MT/T 758-1997 General technical requirements for electrical automatic sprinkler systems for belt conveyors in coal mines
Some standard content:
MT/T758—1997
This standard is formulated on the basis of the relevant enterprise standards of the coal industry, "Technical Conditions for Automatic Fire Extinguishing System of DFH Type Mining Belt Conveyor" (1985), "Technical Conditions for Automatic Fire Extinguishing System of DMH Type Belt Conveyor, DMH-T Temperature Fire Detector and DMH-Z Host, Technical Conditions for DMH-D Power Supply Control Box" (1989), "Technical Conditions for KHJ-1 Type Mine Fire Monitoring System and Automatic Fire Extinguishing Device KG8901 Type Mining Speed Differential Sensor Product and KG8902 Type Mining Temperature Sensor" (1992), "Technical Conditions for Automatic Fire Extinguishing Device of MPZ-1 Type Mining Belt Conveyor" (1992), and the product standards of fire detectors supporting the automatic fire extinguishing system of coal mines, as well as the national standards and industry standards related to fire protection. This standard is proposed by the Science and Technology Education Department of the Ministry of Coal and Coal Industry. This standard is under the jurisdiction of the Coal Mine Safety Standardization Technical Committee of the Ministry of Coal Industry. This standard was drafted by Fushun Branch of China Coal Research Institute. The main drafter of this standard is Yin Fangxiong.
This standard is entrusted to Fushun Branch of China Coal Research Institute for interpretation. 601
Coal Industry Standard of the People's Republic of China
General technical conditions of automatic electric water-spouting fire extinguishing system for coal mine belt conveyor
General technical conditions of automatic electric water-spouting fire extinguishing system for coal mine belt conveyer1Scope
MT/T758-—1997
This standard specifies the basic technical requirements, test methods and inspection rules of the electric water-spouting fire extinguishing system for coal mine belt conveyor. This standard applies to the electric water-spouting fire extinguishing system for coal mine belt conveyor (hereinafter referred to as the system). 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2423.189 Basic environmental testing procedures for electric and electronic products Test A: Low temperature test method GB/T2423.2-89 Basic environmental testing procedures for electric and electronic products Test B: High temperature test method GB/T2423.4-93 Basic environmental testing procedures for electric and electronic products Test Db: Cyclic damp heat test method GB/T2423.5-1995 Basic environmental testing for electric and electronic products Part 2: Test method Test Ea and guidance: Shock GB/T2423.10-1995 Basic environmental testing for electric and electronic products Part 2: Test method Test Fc and guidance: Vibration (sinusoidal)
GB3836 .1--83 General requirements for explosion-proof electrical equipment for explosive atmospheres GB3836.2~-83 Explosion-proof electrical equipment for explosive atmospheres Flameproof electrical equipment "d" GB3836.3---83 Explosion-proof electrical equipment for explosive atmospheres Increased safety electrical equipment "e" GB3836.4--83 Explosion-proof electrical equipment for explosive atmospheres Intrinsically safe circuits and electrical equipment \i" GB4208-93 Enclosure protection grade (IP code) GB/T10111-88 Random sampling method using random numbers MT210-90 Basic test methods for electrical and electronic products for communication, detection and control in coal mines MT382-1995 Mine General technical conditions for smoke sensors MT/T408-1995 DC regulated power supply for coal mines MT443-1995 General technical conditions for sensors for underground environment monitoring in coal mines MT/T627-1996 General technical conditions for fusible alloy automatic sprinkler fire extinguishing systems for coal mine belt conveyors 3 Technical requirements
3.1 General requirements
3.1.1 Working environment conditions:
Temperature 0~40℃;
Relative humidity ≤95% (+25C);
Approved by the Ministry of Coal Industry of the People's Republic of China on December 30, 1997 602
Implementation on June 1, 1998 || tt||There is no corrosive gas around;
There is no significant turbulence or impact;
- Atmospheric pressure is 80~106kPa.
3.1.2 Storage temperature:
-40-~60C.
3.1.3 System composition:
The system consists of the following:
Fire detection sensor;
Control device:
Water sprinkler, etc.
Among them, the fire detection sensor can be
Thermal fire detector;
Smoke sensor;
Carbon monoxide sensor;
MT/T 758-1997
It is composed of one or more combinations of ultraviolet flame detectors and other sensors. The control device consists of
power supply;
alarm and display devices;
electromagnetic valves for starting water sprinkler fire extinguishing devices. The water sprinkler fire extinguishing device consists of
control valves;
sprinklers,
water pipes, etc.
3.1.4 The system should ensure that 40m2 of fire protection is provided near the belt conveyor and drive rollers, and the design flow rate should reach 500 L./s.
3.1.5 The system should be equipped with a device for manually opening the control valve. 3.1.6 When the system is in operation, the water flow rate in the pipeline should not exceed 5m/s, and the local pipeline should not exceed 10m/s under special circumstances. 3.1.7 The fire detection sensors of the system should be easy to install and reliable. 3.2 General requirements
3.2.1 The fire detection sensor shall adopt an intrinsically safe explosion-proof structure and shall comply with the relevant provisions of GB3836.1, GB3836.3 and GB3836.4.
3.2.2 The system control device shall adopt an intrinsically safe or flameproof and intrinsically safe explosion-proof structure and shall comply with the relevant provisions of GB3836.1, GB3836.2, GB3836.3 and GB3836.4. 3.2.3 There shall be no obvious scratches on the surface of each component of the system; the coating on the surface of the shell shall be firm and shall not be corroded or deformed. 3.2.4 Each component of the system shall ensure convenient and reliable commissioning, maintenance and installation; the sensor shall be equipped with a structure that is convenient for hanging or supporting. 3.2.5 The shell protection performance of each component of the system shall comply with the provisions of IP54 in GB4208. 3.2.6 Each component of the system shall be made of stainless material or undergo anti-corrosion treatment. 3.2.7 The connections of all pipes and fittings, connectors or fasteners in the system should be firm and reliable. 3.2.8 The light transmittance of all observation window glasses in the system should be kept good, without defects such as oil stains and scratches. 3.2.9 The buttons in the system should be sensitive and reliable, and the indicator lights and display devices should be clear and bright. 3.3 Fire detection sensors
General requirements
The power supply of the sensor should comply with the provisions of MT/T408. 3.3. 1.1
MT/T 758—1997
3.3.1.2 The maximum operating current of the sensor should not exceed DC 200mA. 3.3.1.3 The output signal system of the sensor should comply with the provisions of 4.2.5 of MT443. 3.3.2 Sensor sensitivity and response time
3.3.2.1 The action temperature and response time of temperature-sensitive fire detectors: a) The relative error between the action temperature of fixed-temperature fire detectors and the calibrated action temperature specified in the product standard shall not exceed 5%; b) The response time of differential temperature fire detectors shall be within the upper and lower limits specified in Table 1 when the heating rate is 10℃/min. Table 1
Heating rate
3.3.2.2 Smoke sensor sensitivity and response time: Lower limit of response time
Upper limit of response time
When the smoke concentration is 0.1mg/m2, the response time corresponding to the sensitivity levels of I, II, and II shall not exceed 15s, 30s, and 60s respectively
3.3.2.3 The sensitivity and response time of other sensors shall comply with the provisions of the corresponding product standards. 3.3.3 Working stability
The sensor shall meet the requirements of 3.3.2 during the working stability test. 3.3.4 Environmental adaptability
3.3.4.1 When the sensor is tested in high and low temperature environments in the working state, it shall meet the requirements of 3.2.2 and 3.3.3. 3.3.4.2 After the sensor is tested in high and low temperature storage and transportation environments in the non-working state, it shall meet the requirements of 3.3.2. 3.3.4.3 After the sensor is tested in impact, no false alarm or false operation shall occur. And it shall meet the requirements of 3.3.2. 3.3.4.4 After the vibration test, the sensor shall not have false alarms or malfunctions, and shall meet the requirements of 3.3.2. 3.3.4.5 After the alternating damp heat test in the non-working state, the sensor shall meet the following requirements: a) The insulation resistance between the live circuit and the shell shall not be less than 1MQ; b) The live circuit and the shell shall withstand a 50Hz, 500V, 1min withstand voltage test; c) It shall meet the requirements of 3.3.2.
3.4 Control device
3.4.1 Functions of the control device
a) It should be able to conduct multi-point real-time fire monitoring; b) When any sensor in the multi-channel sensor senses a fire, it should be able to immediately display and send out a fire alarm signal; c) When there is a fire alarm signal, the solenoid valve should be activated, and then the control valve should be opened to spray water to extinguish the fire; d) When there is a fire alarm signal, it can provide a contact to cut off the power supply of the belt conveyor; e) When there is a fire alarm signal, the fire alarm signal should be transmitted to the mine general dispatching room through the mine and environmental monitoring system; f) It should have a self-test function.
3.4.2 Power grid conditions
The power grid voltage connected to the control device is AC 127,380.660V. After the voltage fluctuation test, it should meet the functional requirements of 3.4.1. 3.4.3 Environmental adaptability
3.4.3.1 When the control device is tested in high and low temperature environments under working conditions, it should meet the requirements of 3.4.1. 3.4.3.2 After the control device has been tested in the non-working high-temperature and low-temperature storage and transportation environment, it shall meet the requirements of 3.2.3 and 3.4.1.
After the control device has been tested in the impact test, it shall meet the requirements of 3.4.1. 3.4.3.3
After the control device has been tested in the vibration test, it shall meet the requirements of 3.4.1. 3.4.3.4
3.4.3.5 After the control device has been tested in the alternating damp heat test, it shall meet the following requirements: 604
a) The electrical insulation resistance shall not be less than 1MQ; MT/T 758—1997
b) It shall be able to withstand the withstand voltage test of 50Hz frequency and 2000V, 1min; c) It shall meet the requirements of 3.4.1.
3.4.4 Solenoid valve working pressure range
The solenoid valve used to start the control valve in the water sprinkler fire extinguishing device should have a working pressure range of 0.1~1.6MPa, the minimum operating pressure should not be greater than 0.1MPa, and the minimum pressure difference should not be greater than 0.1MPa. 3.5 Water sprinkler fire extinguishing bag
The control valve, sprinkler and spray nozzle in the water sprinkler fire extinguishing device shall comply with the relevant provisions of MT/T627. 4 Test method
4.13.2.3, 3.2.4, 3.2.7, 3.2.8, 3.2.9, 3.2.10 shall be inspected by sensory and operational means. 4.23.2.6 The shell protection performance shall be carried out in accordance with the provisions of 5 and 6 of GB4208-93. 4.3 Sensor sensitivity and response time test: 4.3.1 Temperature fire detector:
a) Fixed temperature fire detector action temperature test, observe its action temperature value under the condition of heating at a rate of 1℃/min; b) Differential temperature fire detector response time test, observe its lower and upper limits of response time under the condition of heating at a rate of 10℃/min at a wind speed of 1m/s.
4.3.2 Smoke sensor:
Perform the test in accordance with the method specified in Appendix B of MT382-1995. 4.4 Sensor working stability test:
The sensor is powered on for no less than 2d, and the sensor sensitivity is measured 4 times, with a time interval of 12h. 4.5 Ambient temperature test under working state: Perform the test Ab in GB/T2423.1 and test Bb in GB/T2423.2. Severity level: low temperature 0℃, high temperature 40℃, and the holding time is 2h each. 4.6 Storage and transportation environment temperature test under non-working conditions: 4.6.1 Low temperature test shall be carried out in accordance with the provisions of test Ab in GB/T2423.1. a) Severity level: temperature 40±3℃, holding time 2h; b) After the test, the temperature shall be restored to room temperature in the test box. 4.6.2 High temperature test shall be carried out in accordance with the provisions of test Bb in GB/T2423.2. a) Severity level: temperature 60±3℃, holding time 2h; b) After the test, the temperature shall be restored to room temperature in the test box. 4.7 Impact test:
Carry out in accordance with the provisions of GB/T2423.5.
a) Severity level: peak acceleration is 500m/s, pulse duration is 11±1ms; b) The test sample is not packaged and no intermediate inspection is performed. 4.8 Vibration test:
Carry out in accordance with the provisions of GB/T2423.10-1995. a) Severity level: sweep frequency range 10～150Hz, acceleration 20m/s2, sweep cycle 5 times; b) The test sample is not packaged and no intermediate inspection is performed. 4.9 Alternating damp heat test:
Performed in accordance with the method specified in GB/T2423.4-93. a) Severity level: Maximum temperature 40±2℃, test cycle 12d, b) Placed at room temperature for 2h after the test to remove surface moisture; 605
MT/T 758--1997
c) Insulation resistance is measured in accordance with the method specified in 7 of MT210; d) Power frequency withstand voltage is carried out in accordance with the method specified in 8.6 of GB3836.4. 4.10 Control device function test:
Actual operation and sensory inspection method should be used when the system is online and powered on. 4.11 Voltage fluctuation test:
It should be carried out according to the method in 10 of MT210, and the fluctuation range is -20% to +15% of the nominal voltage value. 5 Inspection rules
5.1 Appraisal inspection
5.1.1 Inspection implementation
It shall be carried out by the quality inspection department designated by the state and the quality inspection department of the manufacturer. 5.1.2 Inspection items
It shall be carried out according to the items specified in Table 2.
Table 2 Inspection items
Item number
Inspection items
3.2.1, 3.2.2
3.2.3, 3.2.4
3.2.6~3.2.10
1 () indicates the items that must be inspected. 2△ indicates the items selected and determined according to the specific situation. 3 indicates the items that are not inspected.
5.1.3 Sampling method
Identification inspection
Delivery inspection
According to the provisions of GB/T10111, the sampling quantity shall not be less than 2 sets from the products that have passed the factory inspection. 5.1.4 Inspection rules
a) For the items of factory inspection in Table 2, each set shall be subject to: Type inspection
b) 3.2.1 and 3.2.2 shall be conducted in accordance with GB3836.1, GB3836.2, GB3836.3, GB3836.4 and other relevant provisions; c) For the other items in Table 1, one set shall be selected from the products that have passed the factory inspection items. 5.1.5 Determination rules
a) The inspection results of 3.2.1 and 3.2.2 shall be in accordance with GB3836.1, GB3836.2, GB3836.3 and GB3836.4 and other relevant regulations 606
MT/T 758-1997
b) The inspection results of other items shall meet the requirements of product standards; c) If any one item in the identification inspection fails, the inspection shall be deemed to be unqualified. 5.2 Factory inspection
5.2.1 Inspection implementation
The factory inspection shall be carried out by the quality inspection department of the manufacturer for each unit. 5.2.2 Inspection items
The items specified in Table 2 shall be carried out.
5.2.3 Inspection rules
If any item in the factory inspection fails, the cause must be found out, the defect must be eliminated, the product must be modified, and the inspection must be carried out again. 5.3 Type inspection
5.3.1 Inspection cycle
Type inspection is carried out in the following cases:
a) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; b) During normal production, an inspection should be carried out periodically after a certain amount of production has been accumulated; c) When the product is stopped for more than 2 years and then resumed; d) When the factory inspection results are significantly different from the last type inspection; e) When the product is transferred to another factory,
f) When the national quality supervision agency makes an inspection request. 5.3.2 Inspection implementation
It shall be carried out by the quality inspection department designated by the state. 5.3.3 Inspection items
It shall be carried out according to the items specified in Table 2.
5.3.4 Inspection rules
5.3.4.1 12 sets of products that have passed the factory inspection shall be selected for testing. 5.3.4.2 If any item fails during the test, double the number of items should be retested. If there is still one set that fails, the type inspection fails and production of the product or individual parts must be stopped. Production can only be continued after the defects are eliminated and the inspection is passed.5 After the sensor has been subjected to the alternating damp heat test in the non-working state, it shall meet the following requirements: a) The insulation resistance between the live circuit and the shell shall not be less than 1MQ; b) The live circuit and the shell shall withstand a withstand voltage test of 50Hz, 500V, 1min; c) It shall meet the requirements of 3.3.2.
3.4 Control device
3.4.1 Function of the control device
a) It shall be able to conduct multi-point real-time fire monitoring; b) When any sensor in the multi-channel sensor senses a fire, it shall be able to immediately display and send out a fire alarm signal; c) When there is a fire alarm signal, the solenoid valve shall be activated, and then the control valve shall be opened to spray water to extinguish the fire; d) When there is a fire alarm signal, it can provide a contact to cut off the power supply of the belt conveyor; e) When there is a fire alarm signal, the fire alarm signal shall be transmitted to the mine general dispatching room through the mine and environmental monitoring system; f) It shall have a self-test function.
3.4.2 Grid conditions
The grid voltage to which the control device is connected is AC 127,380.660V. After the voltage fluctuation test, it shall meet the functional requirements of 3.4.1. 3.4.3 Environmental adaptability
3.4.3.1 When the control device is tested in high and low temperature environments under working conditions, it shall meet the requirements of 3.4.1. 3.4.3.2 After the control device is tested in high and low temperature storage and transportation environments under non-working conditions, it shall meet the requirements of 3.2.3 and 3.4.1.
After the impact test, the control device shall meet the requirements of 3.4.1. 3.4.3.3
After the vibration test, the control device shall meet the requirements of 3.4.1. 3.4.3.4
3.4.3.5 After the alternating damp heat test, the control device shall comply with the following provisions: 604
a) The electrical insulation resistance shall not be less than 1MQ; MT/T 758-1997
b) It shall be able to withstand the voltage test of 50Hz and 2000V, 1min; c) It shall comply with the requirements of 3.4.1.
3.4.4 Working pressure range of solenoid valve
The working pressure range of the solenoid valve used to start the control valve in the water sprinkler fire extinguishing device shall be 0.1~1.6MPa, the minimum operating pressure shall not be greater than 0.1MPa, and the minimum pressure difference shall not be greater than 0.1MPa. 3.5 Water sprinkler fire extinguishing bag
The control valve, sprinkler and spray nozzle in the water sprinkler fire extinguishing device shall comply with the relevant provisions of MT/T627. 4 Test methods
4.13.2.3, 3.2.4, 3.2.7, 3.2.8, 3.2.9, 3.2.10 shall be inspected by sensory organs and operation. 4.23.2.6 The protection performance of the housing shall be carried out in accordance with the provisions of 5 and 6 of GB4208-93. 4.3 Sensor sensitivity and response time test: 4.3.1 Temperature sensing fire detector:
a) Fixed temperature temperature sensing fire detector action temperature test, observe its action temperature value under the condition of heating at a rate of 1℃/min; b) Differential temperature temperature sensing fire detector response time test, observe its lower limit and upper limit of response time under the condition of heating at a rate of 10℃/min when the wind speed is 1m/s.
4.3.2 Smoke sensor:
Perform the method specified in Appendix B of MT382-1995. 4.4 Sensor working stability test:
The sensor is powered on for no less than 2 days, and the sensitivity of the sensor is measured 4 times, with a time interval of 12 hours. 4.5 Ambient temperature test under working state: Conducted in accordance with the provisions of test Ab in GB/T2423.1 and test Bb in GB/T2423.2. Severity level: low temperature 0℃, high temperature 40℃, holding time 2h each. 4.6 Storage and transportation environmental temperature test under non-working state: 4.6.1 Low temperature test is conducted in accordance with the provisions of test Ab in GB/T2423.1. a) Severity level: temperature 40±3℃, holding time 2h; b) After the test, it is restored to room temperature in the test box. 4.6.2 High temperature test is conducted in accordance with the provisions of test Bb in GB/T2423.2. a) Severity level: temperature 60±3℃, holding time 2h; b) After the test, it is restored to room temperature in the test box. 4.7 Impact test:
Conducted in accordance with the provisions of GB/T2423.5.
a) Severity level: peak acceleration is 500m/s, pulse duration is 11±1ms; b) The test sample is not packaged and no intermediate test is performed. 4.8 Vibration test:
Performed in accordance with the provisions of GB/T2423.10-1995. a) Severity level: sweep frequency range is 10～150Hz, acceleration is 20m/s2, and the number of sweep cycles is 5 times; b) The test sample is not packaged and no intermediate test is performed. 4.9 Alternating damp heat test:
Performed in accordance with the method specified in GB/T2423.4-93. a) Severity level: maximum temperature 40±2℃, test cycle 12d, b) place at room temperature for 2h after the test to remove surface moisture; 605
MT/T 758--1997
c) insulation resistance is measured according to the method specified in 7 of MT210; d) power frequency withstand voltage is carried out according to the method specified in 8.6 of GB3836.4. 4.10 Control device function test:
actual operation and sensory inspection method should be adopted when the system is online and powered on. 4.11 Voltage fluctuation test:
should be carried out according to the method in 10 of MT210, and the fluctuation range is -20% to +15% of the nominal voltage value. 5 Inspection rules
5.1 Appraisal inspection
5.1.1 Inspection implementation
It shall be carried out by the quality inspection department designated by the state and the quality inspection department of the manufacturer. 5.1.2 Inspection items
It shall be carried out according to the items specified in Table 2.
Table 2 Inspection Items
Item No.
Inspection Items
3.2.1, 3.2.2
3.2.3, 3.2.4
3.2.6~3.2.10
1（) indicates items that must be inspected. 2△ indicates items that are selected and determined according to specific circumstances. 3 indicates items that are not inspected.
5.1.3 Sampling Method
Identification Inspection
Delivery Inspection
According to the provisions of GB/T10111, the sampling quantity shall be no less than 2 sets from the products that have passed the factory inspection. 5.1.4 Inspection rules
a) For the items in Table 2, each set shall be subject to: Type inspection
b) 3.2.1 and 3.2.2 shall be subject to GB3836.1, GB3836.2, GB3836.3, GB3836.4 and other relevant regulations; c) For the other items in Table 1, one set shall be selected from the qualified products for the factory inspection. 5.1.5 Judgment rules
a) The inspection results of 3.2.1 and 3.2.2 shall be subject to GB3836.1, GB3836.2, GB3836.3 and GB3836.4 and other relevant regulations 606
MT/T 758—1997
b) The inspection results of other items shall meet the requirements of product standards; c) As long as one item in the identification inspection is unqualified, the inspection shall be judged as unqualified. 5.2 Factory Inspection
5.2.1 Inspection Implementation
Factory inspection is conducted by the quality inspection department of the manufacturer for each unit. 5.2.2 Inspection Items
The inspection is conducted according to the items specified in Table 2.
5.2.3 Inspection Rules
If any item fails in the factory inspection, the cause must be found out, the defect must be eliminated, the product must be modified, and the inspection must be conducted again. 5.3 Type Inspection
5.3.1 Inspection Cycle
Type inspection is conducted in the following cases:
a) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; b) During normal production, an inspection should be conducted periodically after a certain amount of production has been accumulated; c) When the product is stopped for more than 2 years and then resumed; d) When the factory inspection results are significantly different from the last type inspection; e) When the product is transferred to another factory,
f) When the national quality supervision agency makes an inspection request. 5.3.2 Inspection implementation
It shall be carried out by the quality inspection department designated by the state. 5.3.3 Inspection items
It shall be carried out according to the items specified in Table 2.
5.3.4 Inspection rules
5.3.4.1Twelve sets of products that have passed the factory inspection shall be selected for testing. 5.3.4.2 If any item fails during the test, double the number of products shall be taken for retesting. If one set still fails, the type inspection fails and the production of the product or individual parts must be stopped. Production can only be continued after the defects are eliminated and the inspection is passed. 6075 After the sensor has been subjected to the alternating damp heat test in the non-working state, it shall meet the following requirements: a) The insulation resistance between the live circuit and the shell shall not be less than 1MQ; b) The live circuit and the shell shall withstand a withstand voltage test of 50Hz, 500V, 1min; c) It shall meet the requirements of 3.3.2.
3.4 Control device
3.4.1 Function of the control device
a) It shall be able to conduct multi-point real-time fire monitoring; b) When any sensor in the multi-channel sensor senses a fire, it shall be able to immediately display and send out a fire alarm signal; c) When there is a fire alarm signal, the solenoid valve shall be activated, and then the control valve shall be opened to spray water to extinguish the fire; d) When there is a fire alarm signal, it can provide a contact to cut off the power supply of the belt conveyor; e) When there is a fire alarm signal, the fire alarm signal shall be transmitted to the mine general dispatching room through the mine and environmental monitoring system; f) It shall have a self-test function.
3.4.2 Grid conditions
The grid voltage to which the control device is connected is AC 127,380.660V. After the voltage fluctuation test, it shall meet the functional requirements of 3.4.1. 3.4.3 Environmental adaptability
3.4.3.1 When the control device is tested in high and low temperature environments under working conditions, it shall meet the requirements of 3.4.1. 3.4.3.2 After the control device is tested in high and low temperature storage and transportation environments under non-working conditions, it shall meet the requirements of 3.2.3 and 3.4.1.
After the impact test, the control device shall meet the requirements of 3.4.1. 3.4.3.3
After the vibration test, the control device shall meet the requirements of 3.4.1. 3.4.3.4
3.4.3.5 After the alternating damp heat test, the control device shall comply with the following provisions: 604
a) The electrical insulation resistance shall not be less than 1MQ; MT/T 758-1997
b) It shall be able to withstand the voltage test of 50Hz and 2000V, 1min; c) It shall comply with the requirements of 3.4.1.
3.4.4 Working pressure range of solenoid valve
The working pressure range of the solenoid valve used to start the control valve in the water sprinkler fire extinguishing device shall be 0.1~1.6MPa, the minimum operating pressure shall not be greater than 0.1MPa, and the minimum pressure difference shall not be greater than 0.1MPa. 3.5 Water sprinkler fire extinguishing bag
The control valve, sprinkler and spray nozzle in the water sprinkler fire extinguishing device shall comply with the relevant provisions of MT/T627. 4 Test methods
4.13.2.3, 3.2.4, 3.2.7, 3.2.8, 3.2.9, 3.2.10 shall be inspected by sensory organs and operation. 4.23.2.6 The protection performance of the housing shall be carried out in accordance with the provisions of 5 and 6 of GB4208-93. 4.3 Sensor sensitivity and response time test: 4.3.1 Temperature sensing fire detector:
a) Fixed temperature temperature sensing fire detector action temperature test, observe its action temperature value under the condition of heating at a rate of 1℃/min; b) Differential temperature temperature sensing fire detector response time test, observe its lower limit and upper limit of response time under the condition of heating at a rate of 10℃/min when the wind speed is 1m/s.
4.3.2 Smoke sensor:
Perform the method specified in Appendix B of MT382-1995. 4.4 Sensor working stability test:
The sensor is powered on for no less than 2 days, and the sensitivity of the sensor is measured 4 times, with a time interval of 12 hours. 4.5 Ambient temperature test under working state: Conducted in accordance with the provisions of test Ab in GB/T2423.1 and test Bb in GB/T2423.2. Severity level: low temperature 0℃, high temperature 40℃, holding time 2h each. 4.6 Storage and transportation environmental temperature test under non-working state: 4.6.1 Low temperature test is conducted in accordance with the provisions of test Ab in GB/T2423.1. a) Severity level: temperature 40±3℃, holding time 2h; b) After the test, it is restored to room temperature in the test box. 4.6.2 High temperature test is conducted in accordance with the provisions of test Bb in GB/T2423.2. a) Severity level: temperature 60±3℃, holding time 2h; b) After the test, it is restored to room temperature in the test box. 4.7 Impact test:
Conducted in accordance with the provisions of GB/T2423.5.
a) Severity level: peak acceleration is 500m/s, pulse duration is 11±1ms; b) The test sample is not packaged and no intermediate test is performed. 4.8 Vibration test:
Performed in accordance with the provisions of GB/T2423.10-1995. a) Severity level: sweep frequency range is 10～150Hz, acceleration is 20m/s2, and the number of sweep cycles is 5 times; b) The test sample is not packaged and no intermediate test is performed. 4.9 Alternating damp heat test:
Performed in accordance with the method specified in GB/T2423.4-93. a) Severity level: maximum temperature 40±2℃, test cycle 12d, b) place at room temperature for 2h after the test to remove surface moisture; 605
MT/T 758--1997
c) insulation resistance is measured according to the method specified in 7 of MT210; d) power frequency withstand voltage is carried out according to the method specified in 8.6 of GB3836.4. 4.10 Control device function test:
actual operation and sensory inspection method should be adopted when the system is online and powered on. 4.11 Voltage fluctuation test:
should be carried out according to the method in 10 of MT210, and the fluctuation range is -20% to +15% of the nominal voltage value. 5 Inspection rules
5.1 Appraisal inspection
5.1.1 Inspection implementation
It shall be carried out by the quality inspection department designated by the state and the quality inspection department of the manufacturer. 5.1.2 Inspection items
It shall be carried out according to the items specified in Table 2.
Table 2 Inspection Items
Item No.
Inspection Items
3.2.1, 3.2.2
3.2.3, 3.2.4
3.2.6~3.2.10
1（) indicates items that must be inspected. 2△ indicates items that are selected and determined according to specific circumstances. 3 indicates items that are not inspected.
5.1.3 Sampling Method
Identification Inspection
Delivery Inspection
According to the provisions of GB/T10111, the sampling quantity shall be no less than 2 sets from the products that have passed the factory inspection. 5.1.4 Inspection rules
a) For the items in Table 2, each set shall be subject to: Type inspection
b) 3.2.1 and 3.2.2 shall be subject to GB3836.1, GB3836.2, GB3836.3, GB3836.4 and other relevant regulations; c) For the other items in Table 1, one set shall be selected from the qualified products for the factory inspection. 5.1.5 Judgment rules
a) The inspection results of 3.2.1 and 3.2.2 shall be subject to GB3836.1, GB3836.2, GB3836.3 and GB3836.4 and other relevant regulations 606
MT/T 758—1997
b) The inspection results of other items shall meet the requirements of product standards; c) As long as one item in the identification inspection is unqualified, the inspection shall be judged as unqualified. 5.2 Factory Inspection
5.2.1 Inspection Implementation
Factory inspection is conducted by the quality inspection department of the manufacturer for each unit. 5.2.2 Inspection Items
The inspection is conducted according to the items specified in Table 2.
5.2.3 Inspection Rules
If any item fails in the factory inspection, the cause must be found out, the defect must be eliminated, the product must be modified, and the inspection must be conducted again. 5.3 Type Inspection
5.3.1 Inspection Cycle
Type inspection is conducted in the following cases:
a) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; b) During normal production, an inspection should be conducted periodically after a certain amount of production has been accumulated; c) When the product is stopped for more than 2 years and then resumed; d) When the factory inspection results are significantly different from the last type inspection; e) When the product is transferred to another factory,
f) When the national quality supervision agency makes an inspection request. 5.3.2 Inspection implementation
It shall be carried out by the quality inspection department designated by the state. 5.3.3 Inspection items
It shall be carried out according to the items specified in Table 2.
5.3.4 Inspection rules
5.3.4.1Twelve sets of products that have passed the factory inspection shall be selected for testing. 5.3.4.2 If any item fails during the test, double the number of products shall be taken for retesting. If one set still fails, the type inspection fails and the production of the product or individual parts must be stopped. Production can only be continued after the defects are eliminated and the inspection is passed. 6071min withstand voltage test; c) should meet the requirements of 3.3.2.
3.4 Control device
3.4.1 Functions of the control device
a) It should be able to conduct multi-point real-time fire monitoring; b) When any sensor in the multi-channel sensor senses a fire, it should be able to immediately display and send out a fire alarm signal; c) When there is a fire alarm signal, the solenoid valve should be activated, and then the control valve should be opened to spray water to extinguish the fire; d) When there is a fire alarm signal, it can provide a contact to cut off the power supply of the belt conveyor; e) When there is a fire alarm signal, the fire alarm signal should be transmitted to the mine general dispatching room through the mine and environmental monitoring system; f) It should have a self-test function.
3.4.2 Power grid conditions
The power grid voltage connected to the control device is AC 127,380.660V. After the voltage fluctuation test, it should meet the functional requirements of 3.4.1. 3.4.3 Environmental adaptability
3.4.3.1 When the control device is tested in high and low temperature environments in the working state, it shall meet the requirements of 3.4.1. 3.4.3.2 After the control device is tested in high and low temperature storage and transportation environments in the non-working state, it shall meet the requirements of 3.2.3 and 3.4.1.
After the control device is tested in impact, it shall meet the requirements of 3.4.1. 3.4.3.3
After the control device is tested in vibration, it shall meet the requirements of 3.4.1. 3.4.3.4
3.4.3.5 After the alternating damp heat test, the control device shall comply with the following provisions: 604
a) The electrical insulation resistance shall not be less than 1MQ; MT/T 758-1997
b) It shall be able to withstand the voltage test of 50Hz and 2000V, 1min; c) It shall comply with the requirements of 3.4.1.
3.4.4 Working pressure range of solenoid valve
The working pressure range of the solenoid valve used to start the control valve in the water sprinkler fire extinguishing device shall be 0.1~1.6MPa, the minimum operating pressure shall not be greater than 0.1MPa, and the minimum pressure difference shall not be greater than 0.1MPa. 3.5 Water sprinkler fire extinguishing bag
The control valve, sprinkler and spray nozzle in the water sprinkler fire extinguishing device shall comply with the relevant provisions of MT/T627. 4 Test methods
4.13.2.3, 3.2.4, 3.2.7, 3.2.8, 3.2.9, 3.2.10 shall be inspected by sensory organs and operation. 4.23.2.6 The protection performance of the housing shall be carried out in accordance with the provisions of 5 and 6 of GB4208-93. 4.3 Sensor sensitivity and response time test: 4.3.1 Temperature sensing fire detector:
a) Fixed temperature temperature sensing fire detector action temperature test, observe its action temperature value under the condition of heating at a rate of 1℃/min; b) Differential temperature temperature sensing fire detector response time test, observe its lower limit and upper limit of response time under the condition of heating at a rate of 10℃/min when the wind speed is 1m/s.
4.3.2 Smoke sensor:
Perform the method specified in Appendix B of MT382-1995. 4.4 Sensor working stability test:
The sensor is powered on for no less than 2 days, and the sensitivity of the sensor is measured 4 times, with a time interval of 12 hours. 4.5 Ambient temperature test under working state: Conducted in accordance with the provisions of test Ab in GB/T2423.1 and test Bb in GB/T2423.2. Severity level: low temperature 0℃, high temperature 40℃, holding time 2h each. 4.6 Storage and transportation environmental temperature test under non-working state: 4.6.1 Low temperature test is conducted in accordance with the provisions of test Ab in GB/T2423.1. a) Severity level: temperature 40±3℃, holding time 2h; b) After the test, it is restored to room temperature in the test box. 4.6.2 High temperature test is conducted in accordance with the provisions of test Bb in GB/T2423.2. a) Severity level: temperature 60±3℃, holding time 2h; b) After the test, it is restored to room temperature in the test box. 4.7 Impact test:
Conducted in accordance with the provisions of GB/T2423.5.
a) Severity level: peak acceleration is 500m/s, pulse duration is 11±1ms; b) The test sample is not packaged and no intermediate test is performed. 4.8 Vibration test:
Performed in accordance with the provisions of GB/T2423.10-1995. a) Severity level: sweep frequency range is 10～150Hz, acceleration is 20m/s2, and the number of sweep cycles is 5 times; b) The test sample is not packaged and no intermediate test is performed. 4.9 Alternating damp heat test:
Performed in accordance with the method specified in GB/T2423.4-93. a) Severity level: maximum temperature 40±2℃, test cycle 12d, b) place at room temperature for 2h after the test to remove surface moisture; 605
MT/T 758--1997
c) insulation resistance is measured according to the method specified in 7 of MT210; d) power frequency withstand voltage is carried out according to the method specified in 8.6 of GB3836.4. 4.10 Control device function test:
actual operation and sensory inspection method should be adopted when the system is online and powered on. 4.11 Voltage fluctuation test:
should be carried out according to the method in 10 of MT210, and the fluctuation range is -20% to +15% of the nominal voltage value. 5 Inspection rules
5.1 Appraisal inspection
5.1.1 Inspection implementation
It shall be carried out by the quality inspection department designated by the state and the quality inspection department of the manufacturer. 5.1.2 Inspection items
It shall be carried out according to the items specified in Table 2.
Table 2 Inspection Items
Item No.
Inspection Items
3.2.1, 3.2.2
3.2.3, 3.2.4
3.2.6~3.2.10
1（) indicates items that must be inspected. 2△ indicates items that are selected and determined according to specific circumstances. 3 indicates items that are not inspected.
5.1.3 Sampling Method
Identification Inspection
Delivery Inspection
According to the provisions of GB/T10111, the sampling quantity shall be no less than 2 sets from the products that have passed the factory inspection. 5.1.4 Inspection rules
a) For the items in Table 2, each set shall be subject to: Type inspection
b) 3.2.1 and 3.2.2 shall be subject to GB3836.1, GB3836.2, GB3836.3, GB3836.4 and other relevant regulations; c) For the other items in Table 1, one set shall be selected from the qualified products for the factory inspection. 5.1.5 Judgment rules
a) The inspection results of 3.2.1 and 3.2.2 shall be subject to GB3836.1, GB3836.2, GB3836.3 and GB3836.4 and other relevant regulations 606
MT/T 758—1997
b) The inspection results of other items shall meet the requirements of product standards; c) As long as one item in the identification inspection is unqualified, the inspection shall be judged as unqualified. 5.2 Factory Inspection
5.2.1 Inspection Implementation
Factory inspection is conducted by the quality inspection department of the manufacturer for each unit. 5.2.2 Inspection Items
The inspection is conducted according to the items specified in Table 2.
5.2.3 Inspection Rules
If any item fails in the factory inspection, the cause must be found out, the defect must be eliminated, the product must be modified, and the inspection must be conducted again. 5.3 Type Inspection
5.3.1 Inspection Cycle
Type inspection is conducted in the following cases:
a) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; b) During normal production, an inspection should be conducted periodically after a certain amount of production has been accumulated; c) When the product is stopped for more than 2 years and then resumed; d) When the factory inspection results are significantly different from the last type inspection; e) When the product is transferred to another factory,
f) When the national quality supervision agency makes an inspection request. 5.3.2 Inspection implementation
It shall be carried out by the quality inspection department designated by the state. 5.3.3 Inspection items
It shall be carried out according to the items specified in Table 2.
5.3.4 Inspection rules
5.3.4.1Twelve sets of products that have passed the factory inspection shall be selected for testing. 5.3.4.2 If any item fails during the test, double the number of products shall be taken for retesting. If one set still fails, the type inspection fails and the production of the product or individual parts must be stopped. Production can only be continued after the defects are eliminated and the inspection is passed. 6071min withstand voltage test; c) should meet the requirements of 3.3.2.
3.4 Control device
3.4.1 Functions of the control device
a) It should be able to conduct multi-point real-time fire monitoring; b) When any sensor in the multi-channel sensor senses a fire, it should be able to immediately display and send out a fire alarm signal; c) When there is a fire alarm signal, the solenoid valve should be activated, and then the control valve should be opened to spray water to extinguish the fire; d) When there is a fire alarm signal, it can provide a contact to cut off the power supply of the belt conveyor; e) When there is a fire alarm signal, the fire alarm signal should be transmitted to the mine general dispatching room through the mine and environmental monitoring system; f) It should have a self-test function.
3.4.2 Power grid conditions
The power grid voltage connected to the control device is AC 127,380.660V. After the voltage fluctuation test, it should meet the functional requirements of 3.4.1. 3.4.3 Environmental adaptability
3.4.3.1 When the control device is tested in high and low temperature environments in the working state, it shall meet the requirements of 3.4.1. 3.4.3.2 After the control device is tested in high and low temperature storage and transportation environments in the non-working state, it shall meet the requirements of 3.2.3 and 3.4.1.
After the control device is tested in impact, it shall meet the requirements of 3.4.1. 3.4.3.3
After the control device is tested in vibration, it shall meet the requirements of 3.4.1. 3.4.3.4
3.4.3.5 After the alternating damp heat test, the control device shall comply with the following provisions: 604
a) The electrical insulation resistance shall not be less than 1MQ; MT/T 758-1997
b) It shall be able to withstand the voltage test of 50Hz and 2000V, 1min; c) It shall comply with the requirements of 3.4.1.
3.4.4 Working pressure range of solenoid valve
The working pressure range of the solenoid valve used to start the control valve in the water sprinkler fire extinguishing device shall be 0.1~1.6MPa, the minimum operating pressure shall not be greater than 0.1MPa, and the minimum pressure difference shall not be greater than 0.1MPa. 3.5 Water sprinkler fire extinguishing bag
The control valve, sprinkler and spray nozzle in the water sprinkler fire extinguishing device shall comply with the relevant provisions of MT/T627. 4 Test methods
4.13.2.3, 3.2.4, 3.2.7, 3.2.8, 3.2.9, 3.2.10 shall be inspected by sensory organs and operation. 4.23.2.6 The protection performance of the housing shall be carried out in accordance with the provisions of 5 and 6 of GB4208-93. 4.3 Sensor sensitivity and response time test: 4.3.1 Temperature sensing fire detector:
a) Fixed temperature temperature sensing fire detector action temperature test, observe its action temperature value under the condition of heating at a rate of 1℃/min; b) Differential temperature temperature sensing fire detector response time test, observe its lower limit and upper limit of response time under the condition of heating at a rate of 10℃/min when the wind speed is 1m/s.
4.3.2 Smoke sensor:
Perform the method specified in Appendix B of MT382-1995. 4.4 Sensor working stability test:
The sensor is powered on for no less than 2 days, and the sensitivity of the sensor is measured 4 times, with a time interval of 12 hours. 4.5 Ambient temperature test under working state: Conducted in accordance with the provisions of test Ab in GB/T2423.1 and test Bb in GB/T2423.2. Severity level: low temperature 0℃, high temperature 40℃, holding time 2h each. 4.6 Storage and transportation environmental temperature test under non-working state: 4.6.1 Low temperature test is conducted in accordance with the provisions of test Ab in GB/T2423.1. a) Severity level: temperature 40±3℃, holding time 2h; b) After the test, it is restored to room temperature in the test box. 4.6.2 High temperature test is conducted in accordance with the provisions of test Bb in GB/T2423.2. a) Severity level: temperature 60±3℃, holding time 2h; b) After the test, it is restored to room temperature in the test box. 4.7 Impact test:
Conducted in accordance with the provisions of GB/T2423.5.
a) Severity level: peak acceleration is 500m/s, pulse duration is 11±1ms; b) The test sample is not packaged and no intermediate test is performed. 4.8 Vibration test:
Performed in accordance with the provisions of GB/T2423.10-1995. a) Severity level: sweep frequency range is 10～150Hz, acceleration is 20m/s2, and the number of sweep cycles is 5 times; b) The test sample is not packaged and no intermediate test is performed. 4.9 Alternating damp heat test:
Performed in accordance with the method specified in GB/T2423.4-93. a) Severity level: maximum temperature 40±2℃, test cycle 12d, b) place at room temperature for 2h after the test to remove surface moisture; 605
MT/T 758--1997
c) insulation resistance is measured according to the method specified in 7 of MT210; d) power frequency withstand voltage is carried out according to the method specified in 8.6 of GB3836.4. 4.10 Control device function test:
actual operation and sensory inspection method should be adopted when the system is online and powered on. 4.11 Voltage fluctuation test:
should be carried out according to the method in 10 of MT210, and the fluctuation range is -20% to +15% of the nominal voltage value. 5 Inspection rules
5.1 Appraisal inspection
5.1.1 Inspection implementation
It shall be carried out by the quality inspection department designated by the state and the quality inspection department of the manufacturer. 5.1.2 Inspection items
It shall be carried out according to the items specified in Table 2.
Table 2 Inspection Items
Item No.
Inspection Items
3.2.1, 3.2.2
3.2.3, 3.2.4
3.2.6~3.2.10
1（) indicates items that must be inspected. 2△ indicates items that are selected and determined according to specific circumstances. 3 indicates items that are not inspected.
5.1.3 Sampling Method
Identification Inspection
Delivery Inspection
According to the provisions of GB/T10111, the sampling quantity shall be no less than 2 sets from the products that have passed the factory inspection. 5.1.4 Inspection rules
a) For the items in Table 2, each set shall be subject to: Type inspection
b) 3.2.1 and 3.2.2 shall be subject to GB3836.1, GB3836.2, GB3836.3, GB3836.4 and other relevant regulations; c) For the other items in Table 1, one set shall be selected from the qualified products for the factory inspection. 5.1.5 Judgment rules
a) The inspection results of 3.2.1 and 3.2.2 shall be subject to GB3836.1, GB3836.2, GB3836.3 and GB3836.4 and other relevant regulations 606
MT/T 758—1997
b) The inspection results of other items shall meet the requirements of product standards; c) As long as one item in the identification inspection is unqualified, the inspection shall be judged as unqualified. 5.2 Factory Inspection
5.2.1 Inspection Implementation
Factory inspection is conducted by the quality inspection department of the manufacturer for each unit. 5.2.2 Inspection Items
The inspection is conducted according to the items specified in Table 2.
5.2.3 Inspection Rules
If any item fails in the factory inspection, the cause must be found out, the defect must be eliminated, the product must be modified, and the inspection must be conducted again. 5.3 Type InspectionwwW.bzxz.Net
5.3.1 Inspection Cycle
Type inspection is conducted in the following cases:
a) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; b) During normal production, an inspection should be conducted periodically after a certain amount of production has been accumulated; c) When the product is stopped for more than 2 years and then resumed; d) When the factory inspection results are significantly different from the last type inspection; e) When the product is transferred to another factory,
f) When the national quality supervision agency makes an inspection request. 5.3.2 Inspection implementation
It shall be carried out by the quality inspection department designated by the state. 5.3.3 Inspection items
It shall be carried out according to the items specified in Table 2.
5.3.4 Inspection rules
5.3.4.1Twelve sets of products that have passed the factory inspection shall be selected for testing. 5.3.4.2 If any item fails during the test, double the number of products shall be taken for retesting. If one set still fails, the type inspection fails and the production of the product or individual parts must be stopped. Production can only be continued after the defects are eliminated and the inspection is passed. 6071 Function of the control device
a) It should be able to conduct multi-point real-time fire monitoring; b) When any sensor in the multi-channel sensor senses a fire, it should be able to immediately display and send out a fire alarm signal; c) When there is a fire alarm signal, the solenoid valve should be activated, and then the control valve should be opened to spray water to extinguish the fire; d) When there is a fire alarm signal, it can provide a contact to cut off the power supply of the belt conveyor; e) When there is a fire alarm signal, the fire alarm signal should be transmitted to the mine general dispatching room through the mine and environmental monitoring system; f) It should have a self-test function.
3.4.2 Power grid conditions
The power grid voltage connected to the control device is AC 127,380.660V. After the voltage fluctuation test, it should meet the functional requirements of 3.4.1. 3.4.3 Environmental adaptability
3.4.3.1 When the control device is tested in high and low temperature environments under working conditions, it should meet the requirements of 3.4.1. 3.4.3.2 After the control device has been tested in the non-working high-temperature and low-temperature storage and transportation environment, it shall meet the requirements of 3.2.3 and 3.4.1.
After the control device has been tested in the impact test, it shall meet the requirements of 3.4.1. 3.4.3.3
After the control device has been tested in the vibration test, it shall meet the requirements of 3.4.1. 3.4.3.4
3.4.3.5 After the control device has been tested in the alternating damp heat test, it shall meet the following requirements: 604
a) The electrical insulation resistance shall not be less than 1MQ; MT/T 758—1997
b) It shall be able to withstand the withstand voltage test of 50Hz frequency and 2000V, 1min; c) It shall meet the requirements of 3.4.1.
3.4.4 Solenoid valve working pressure range
The solenoid valve used to start the control valve in the water sprinkler fire extinguishing device should have a working pressure range of 0.1~1.6MPa, the minimum operating pressure should not be greater than 0.1MPa, and the minimum pressure difference should not be greater than 0.1MPa. 3.5 Water sprinkler fire extinguishing bag
The control valve, sprinkler and spray nozzle in the water sprinkler fire extinguishing device shall comply with the relevant provisions of MT/T627. 4 Test method
4.13.2.3, 3.2.4, 3.2.7, 3.2.8, 3.2.9, 3.2.10 shall be inspected by sensory and operational means. 4.23.2.6 The shell protection performance shall be carried out in accordance with the provisions of 5 and 6 of GB4208-93. 4.3 Sensor sensitivity and response time test: 4.3.1 Temperature fire detector:
a) Fixed temperature fire detector action temperature test, observe its action temperature value under the condition of heating at a rate of 1℃/min; b) Differential temperature fire detector response time test, observe its lower and upper limits of response time under the condition of heating at a rate of 10℃/min at a wind speed of 1m/s.
4.3.2 Smoke sensor:
Perform the test in accordance with the method specified in Appendix B of MT382-1995. 4.4 Sensor working stability test:
The sensor is powered on for no less than 2d, and the sensor sensitivity is measured 4 times, with a time interval of 12h. 4.5 Ambient temperature test under working state: Perform the test Ab in GB/T2423.1 and test Bb in GB/T2423.2. Severity level: low temperature 0℃, high temperature 40℃, and the holding time is 2h each. 4.6 Storage and transportation environment temperature test under non-working conditions: 4.6.1 Low temperature test shall be carried out in accordance with the provisions of test Ab in GB/T2423.1. a) Severity level: temperature 40±3℃, holding time 2h; b) After the test, the temperature shall be restored to room temperature in the test box. 4.6.2 High temperature test shall be carried out in accordance with the provisions of test Bb in GB/T2423.2. a) Severity level: temperature 60±3℃, holding time 2h; b) After the test, the temperature shall be restored to room temperature in the test box. 4.7 Impact test:
Carry out in accordance with the provisions of GB/T2423.5.
a) Severity level: peak acceleration is 500m/s, pulse duration is 11±1ms; b) The test sample is not packaged and no intermediate inspection is performed. 4.8 Vibration test:
Carry out in accordance with the provisions of GB/T2423.10-1995. a) Severity level: sweep frequency range 10～150Hz, acceleration 20m/s2, sweep cycle 5 times; b) The test sample is not packaged and no intermediate inspection is performed. 4.9 Alternating damp heat test:
Performed in accordance with the method specified in GB/T2423.4-93. a) Severity level: Maximum temperature 40±2℃, test cycle 12d, b) Placed at room temperature for 2h after the test to remove surface moisture; 605
MT/T 758--1997
c) Insulation resistance is measured in accordance with the method specified in 7 of MT210; d) Power frequency withstand voltage is carried out in accordance with the method specified in 8.6 of GB3836.4. 4.10 Control device function test:
Actual operation and sensory inspection method should be used when the system is online and powered on. 4.11 Voltage fluctuation test:
It should be carried out according to the method in 10 of MT210, and the fluctuation range is -20% to +15% of the nominal voltage value. 5 Inspection rules
5.1 Appraisal inspection
5.1.1 Inspection implementation
It shall be carried out by the quality inspection department designated by the state and the quality inspection department of the manufacturer. 5.1.2 Inspection items
It shall be carried out according to the items specified in Table 2.
Table 2 Inspection items
Item number
Inspection items
3.2.1, 3.2.2
3.2.3, 3.2.4
3.2.6~3.2.10
1 () indicates the items that must be inspected. 2△ indicates the items selected and determined according to the specific situation. 3 indicates the items that are not inspected.
5.1.3 Sampling method
Identification inspection
Delivery inspection
According to the provisions of GB/T10111, the sampling quantity shall not be less than 2 sets from the products that have passed the factory inspection. 5.1.4 Inspection rules
a) For the items of factory inspection in Table 2, each set shall be subject to: Type inspection
b) 3.2.1 and 3.2.2 shall be conducted in accordance with GB3836.1, GB3836.2, GB3836.3, GB3836.4 and other relevant provisions; c) For the other items in Table 1, one set shall be selected from the products that have passed the factory inspection items. 5.1.5 Determination rules
a) The inspection results of 3.2.1 and 3.2.2 shall be in accordance with GB3836.1, GB3836.2, GB3836.3 and GB3836.4 and other relevant regulations 606
MT/T 758-1997
b) The inspection results of other items shall meet the requirements of product standards; c) If any one item in the identification inspection fails, the inspection shall be deemed to be unqualified. 5.2 Factory inspection
5.2.1 Inspection implementation
The factory inspection shall be carried out by the quality inspection department of the manufacturer for each unit. 5.2.2 Inspection items
The items specified in Table 2 shall be carried out.
5.2.3 Inspection rules
If any item in the factory inspection fails, the cause must be found out, the defect must be eliminated, the product must be modified, and the inspection must be carried out again. 5.3 Type inspection
5.3.1 Inspection cycle
Type inspection is carried out in the following cases:
a) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; b) During normal production, an inspection should be carried out periodically after a certain amount of production has been accumulated; c) When the product is stopped for more than 2 years and then resumed; d) When the factory inspection results are significantly different from the last type inspection; e) When the product is transferred to another factory,
f) When the national quality supervision agency makes an inspection request. 5.3.2 Inspection implementation
It shall be carried out by the quality inspection department designated by the state. 5.3.3 Inspection items
It shall be carried out according to the items specified in Table 2.
5.3.4 Inspection rules
5.3.4.1 12 sets of products that have passed the factory inspection shall be selected for testing. 5.3.4.2 If any item fails during the test, double the number of items should be retested. If there is still one set that fails, the type inspection fails and production of the product or individual parts must be stopped. Production can only be continued after the defects are eliminated and the inspection is passed.1 Functions of the control device
a) It should be able to conduct multi-point real-time fire monitoring; b) When any sensor in the multi-channel sensor senses a fire, it should be able to immediately display and send out a fire alarm signal; c) When there is a fire alarm signal, the solenoid valve should be activated, and then the control valve should be opened to spray water to extinguish the fire; d) When there is a fire alarm signal, it can provide a contact to cut off the power supply of the belt conveyor; e) When there is a fire alarm signal, the fire alarm signal should be transmitted to the mine general dispatching room through the mine and environmental monitoring system; f) It should have a self-test function.
3.4.2 Power grid conditions
The power grid voltage connected to the control device is AC 127,380.660V. After the voltage fluctuation test, it should meet the functional requirements of 3.4.1. 3.4.3 Environmental adaptability
3.4.3.1 When the control device is tested
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.