JB 10143-1999 Technical requirements for automatic fire extinguishers for electric spark forming machines
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JB10143-1999
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The flammable working fluid used in the EDM machine has the risk of fire during operation. Therefore, machine tools are required to have fire prevention and fire extinguishing functions. GB13567-1998 "Technical Requirements for Safety Protection of Electric Discharge Machining Machine Tools" clearly stipulates: "Electric discharge machining machine tools that use flammable working fluids should be equipped with fire extinguishers and reserve automatic fire extinguishing device interfaces. With the development of production, EDM forming is required The fire prevention and fire extinguishing functions of the machine tools are becoming more and more perfect, and the installation of automatic fire extinguishers has greatly enhanced the fire prevention and fire extinguishing capabilities of the machine tools. However, it also raises the question of whether the automatic fire extinguishers themselves are safe and reliable. This standard aims to standardize the design of automatic fire extinguishers. and manufacturing, so that it can truly play the role of fire prevention and fire extinguishing without causing additional risks, so as to improve the safety level of EDM machines. This standard is recommended by the National Technical Committee for Standardization of Special Processing Machine Tools. The drafting unit of this standard is Beijing Electrical Processing Research Institute. The main drafters of this standard are Jiang Hengshun and Ji Renxing. 229
People's Republic of China Machinery Industry Standards
For EDM. Automatic fire extinguishers
Technical conditions
Automatic fire extinguishersfor die sinking electro-discharge machines-Technical requirements scope
JB10143-1999
This standard specifies the specifications for use in EDM machines Models and specifications, technical requirements, test methods, inspection rules, markings and instructions for use, packaging and storage of automatic fire extinguishers
This standard applies to automatic fire extinguishers for spark forming machines using flammable working fluids (below). Referred to as fire extinguishers). 2 Referenced standards
The provisions contained in the following standards constitute provisions of this standard when this standard is published. All standards will be revised. , parties using this standard should explore the possibility of using the latest version of the following standards GB191-1990 Packaging, storage and transportation pictorial markings
GB/T2423.3-1993 Basic environmental testing procedures for electrical and electronic products Test Ca: Constant. Damp heat test method GB/T 2423.10--1995
Environmental testing of electrical and electronic products Part 2: Test method Test Fc and guidelines: Vibration (sinusoidal)
GB/T 2828—1987||tt ||Batch-by-batch inspection and counting sampling procedures and sampling tables (applicable to inspection of continuous batches) GB/T 2829--1987
Periodic inspection and counting sampling procedures and sampling tables (applicable to inspection of production process stability) GB 4716--19931
Technical requirements and test methods for point temperature fire detectors GB 4717-1993
GB 5099--1994
GB 5100--1994
General technical conditions for fire alarm controllers
Steel seamless gas cylinders
Steel welded gas cylinders
GB/T5226.1--1996: Industrial machinery and electrical equipment Part 1: General Technical Conditions
GB9969.1—1998 Industrial Product Instructions General
GB/T13306--1991 Label
GB13567—1998 Electrical Discharge Machining Machine Tool Safety Protection Technical Requirements JB/T8356.1 -1996 Machine tool packaging technical conditions JB/T8356.3-1996 Medium and small wooden boxes for machine tool packaging JB/T9875-1999 Preparation of random technical documents for metal cutting machine tools GN11--1982 Fire protection product model preparation method 3 definition
this The following definitions apply.
3.1 liquid storage bottle
National Machinery Industry Bureau approved 230 on 1999-10-08
2000-03-01 implementation
Cylinders for storing fire extinguishing agents (i.e. fire extinguisher bottles ). 3.2 Heat-sensing fire detector
JB10143-—1999
A device that can quickly sense the temperature rise generated when a fire occurs and output a signal when the temperature reaches a predetermined value to provide a fire alarm or activate a fire extinguisher at the same time .
3.3 Test oil tank
A special steel oil tank used to test the fire extinguishing function of automatic fire extinguishers. 3.4 Basic functions
The functions of detection, alarm, fire extinguishing, power outage and other functions necessary for automatic fire extinguishers. 3.5 Inspection function
After the automatic fire extinguisher is powered on, it has a self-inspection function for the circuit and alarm system. 3.6 Monitor the working status
The automatic fire extinguisher is in a working status that detects and can send out alarm signals. Models and Specifications
4
4.1 Model
The model compilation method of fire extinguishers is in accordance with the regulations of GN11. Marking example:
Art
Nozzle type
-Charging dose, kg
Fire extinguishing agent type
An automatic fire extinguisher
4.2 Type
The type of fire extinguisher is 1211, code Y.
4.3 specifications
Fire extinguishers are divided into specifications according to the amount of filled agent. Series specifications are divided into 2, 3.4, 6kg, etc. 4.4 Type
There are many types of fire extinguishers, such as A-single nozzle type, B-multi-nozzle type, etc. 4.5 Main indicators
The main indicators of fire extinguishers are shown in Table 1.
Table 1
Project
Indicator value
5 Technical requirements
5.1 Function
Using temperature
C|| tt||-10～+50
Induction temperature
C
60±5
Working voltage
24±1
Fire extinguishing Dose/fire extinguishing area
kg/m
[2/1.25.3/2.4/2.5,6/4
Liquid storage bottle pressure
MPa||tt| |1.5±0.1
5.1.1 The fire extinguisher should have the following basic functions: when the machine tool working fluid catches fire, it can directly receive the signal sent by the detector, automatically open the liquid storage bottle, and spray fire extinguishing agent to the fire point. , put out the fire. At the same time, it should be able to send out a signal to cut off the main power supply of the machine tool and an alarm signal. 5.1.2 The fire extinguisher should have a "check button" that can conveniently check the continuity of its circuit and the reliability of the alarm function at any time. During the inspection, the alarm 231
should alarm, but the liquid storage bottle must not be activated.| |tt||JB10143--1999
5.1.3 When the fluctuation amplitude of AC power supply voltage does not exceed ±15% or ±10% of the rated voltage, and the frequency deviation does not exceed ±1% of the standard frequency, the fire extinguisher should Can work normally. 5.1.4 The fire extinguisher should also have the function of manual fire extinguishing. 5.2 Main component performance
The main components of the fire extinguisher should be in compliance with the relevant national standards and should meet 5.2.1~-5.2.3 respectively. Requirements. 5.2.1 The response time and other performance indicators of the temperature-sensitive fire detector used in the detector
fire extinguisher shall comply with the provisions of GB4716. 5.2.2 Liquid storage bottle
The liquid storage bottle of the fire extinguisher. The performance indicators shall comply with the provisions of GB5099 or GB5100. 5.2.3 Electrical devices
The electrical devices of fire extinguishers shall comply with the provisions of GB/T5226.1. 5.3 Appearance and assembly quality
5.3.1 Fire extinguishers The appearance should be flat and smooth, with no peeling or blistering in the coating, and no obvious scratches, cracks, burrs or other mechanical damage. 5.3.2 The fasteners of the fire extinguisher should be fastened reliably, and the fastening parts should not be loose. 5.3. 3. The control of the fire extinguisher and the action of the actuator should be flexible and reliable. 5.4 Equipment requirements on machine tools
5.4.1 The capacity of the fire extinguisher should be determined according to the area of ??the working fluid tank of the EDM machine. 5.4.2 The fire extinguisher should be fixed on the machine tool. The installation of the nozzle and detector can be carried out according to 6.2.2b) and 6.2.2c). The detector should be as close as possible to the discharge part
5.5 Test inspection
The fire extinguisher should be able to withstand the electrical transient test, constant humidity and heat test, vibration (sinusoidal) test, anti-interference test and voltage fluctuation test specified in Chapter 6, and should meet all technical requirements specified in this standard after the test 6 Test Methods | |tt||6.1 Check function test
Test method: Connect the power supply of the fire extinguisher to the 220V, 50Hz AC power supply, and test the "check button function." Test results: Should comply with the provisions of 5.1.2. 6.2Basic functional test
6.2.1 Test conditions
Ambient temperature: 15~35C
Relative humidity: 45%~~75%
Air pressure: 86~106 kPa (650~~800 mmHg) tests are generally conducted indoors.
6.2.2 Test preparation
a) Test oil tank: imitate the working fluid tank of the EDM machine, made of steel plate, the wall thickness shall not be greater than 3mm, and the width of the reinforced edge along the door shall not be greater than 30mm. The size of the inner cavity depends on the capacity of the liquid storage bottle (see Table 2). Put kerosene in the oil tank. The oil level height should be no less than 1/2 of the height of the oil tank cavity. To ensure that the oil level in the tank meets the requirements, clean water can be added, but the thickness of the oil layer shall not be less than 30mm. 232
Test storage bottle capacity
kg
2.3
3+4
6
Length
mm
JB10143—1999
Table 2
1250
1600
2000
width
mm
1000
1250
1500
high
mm
300
300
300
h) Nozzle installation: Use a bracket to fix the nozzle at the corner of the oil tank. The central axis of the nozzle intersects with the diagonal line (1.) along the upper plane of the oil tank at L/5 (approximately 50° downward tilt). The installation height of the nozzle (H) It is about (0.1~0.2)L, see Figure 1. AA
Central axis
Figure 1
Kerosene
Oil tank
c) Detector installation: Use an adjustable bracket to fix the temperature detector on the test The appropriate position in the space above the oil tank is 200 mma from the oil level
6.2.3 Test steps
Ignite the kerosene in the oil tank. When the temperature around the detector reaches 60C ± 5C, the fire extinguisher alarm An alarm signal should be issued quickly and the contactor with a capacity of 3A/380V should be disconnected; at the same time, the valve of the liquid storage bottle should be opened and the fire extinguishing agent should be sprayed out to extinguish the fire. 6.2.4 Test evaluation
a) If the flame is extinguished, no re-ignition occurs within 1 min, and there is residual kerosene in the oil tank, the fire is extinguished successfully. b) If the fire is successfully extinguished after two consecutive tests, it will be deemed qualified. 6.3 Electrical transient test
6.3.1 Test purpose
Test the ability of the fire extinguisher to resist power transient interference. 6.3.2 Test requirements
Conduct the test according to the provisions of Table 3
233
Test name
Electrical transient test
6.3.3 Test steps| |tt||Power-off time
1
JB10143—1999
Table 3
Power-on time
9
Number of on-offs| | tt | )" continuous on and off 500 times according to the fixed procedure. 6.3.4 Test evaluation
a) The fire extinguisher should not send out a fire alarm signal during the test: b) After the test, the "inspection function test" should be carried out according to the provisions of 6.1. Comply with the provisions of 5.1.2. 6.4 Constant humidity and heat test
6.4.1 Test purpose
Test the performance stability of the fire extinguisher under corresponding humidity and heat conditions
According to the table. Test according to the provisions of 4.
Table 4
Test name
Constant humidity and heat test
6.4.3 Test steps
Relative humidity
90
Temperature
C
40
Duration
h
24
Fire extinguisher status
Monitoring status
Fire extinguisher status
Visiting status
6.4.3.1 The liquid storage bottle of the fire extinguisher is filled with nitrogen or carbon dioxide gas according to the designed maximum filling volume, reaching the corresponding level at 20C J. Set the pressure level and place it under normal atmospheric conditions for 2-~4 hours. 6.4.3.2 Place the fire extinguisher in the constant heat and humidity test chamber, turn on the power, and adjust the temperature of the test chamber to 40 (±2). (The relative humidity is 90% to 92% (adjust the temperature first, and then humidify after the temperature stabilizes). Take it out after 24 hours, and immediately conduct a ~pickup function test." The test results should comply with the provisions of 5.1.2. 6.4.3.3 After the "check function test", keep the fire extinguisher in the monitoring state under normal atmospheric conditions for 1 to 2h6.4.4 Test evaluation
a) The fire extinguisher should not send out a fire alarm signal during the test; b) Perform according to 6.1 and 6.2 Test. It should comply with the provisions of 5.1.1 and 5.1.2; c) Check the appearance and fastening parts after the test, and it should comply with the provisions of 5.3; d) The net weight loss of the fire extinguishing agent in the liquid storage bottle should not exceed 0.5 of the filling amount. %, the pressure drop should not exceed 1% of the filling pressure. 6.4.5 Test equipment
Test equipment shall comply with the provisions of Chapter 2 of GB/T2423.3-1993. 6.5 Vibration (sinusoidal) test
6.5.1 Test purpose
Test the performance stability of the fire extinguisher under specified vibration conditions. 6.5.2 Test requirements
Carry out the test according to the provisions of Table 5.
234
Test name
Vibration (positive
string) test
6.5.3 Test steps
Frequency cycle||tt| |Range
Range
Hz
5 ~ 60 ~ 5
6.5.3.1 Same as 6.4.3.1.
Drive amplitude
mm
0.19
(single)
JB10143—1999
Table 5
Scan rate| |tt||octave/min
resonance point
holding time
min
10
6.5.3.2 according to Appendix L in GB4717-1993 The provisions of Chapter L2. 6.5.4 Test evaluation
Same as 6.4.4.
6.5.5 Test equipment
The vibration table and fixtures shall comply with the regulations of GB/T2423.10. 6.6 Anti-interference test
6.6.1 Test purpose
Check the reliability and stability of the fire extinguisher control system. 6.6.2 Test requirements
Connect the detector, turn on the power supply, and put the fire extinguisher in monitoring working status. 6.6.3 Test steps
Resonance point
Drive amplitude
mm
0.19
(single)
Vibration direction||tt| | When the machine performs discharge processing separately under the conditions of pulse width t: 101s, frequency f=25kHz, all power tubes turned on, and 100A working current, the detector should not output an alarm signal. 6.7 Voltage fluctuation test
6.7.1 Test purpose
Test the adaptability of the fire extinguisher to changes in power supply parameters. 6.7.2 Test preparation
Turn on the power supply, and use a voltage regulator to adjust the grid voltage input to the fire extinguisher to 187V and 242V respectively, so that the fire extinguisher is in a monitoring operation state.
6.7.3 Test steps
Same as 6.6.3 or 6.3.3.
6.7.4 Test evaluationbZxz.net
a) For 6.3.3, it should be carried out according to 6.3.4; b) For 6.6.3. The detector shall not output an alarm signal. 7 Inspection Rules
7.1 Products shipped out shall be inspected by the manufacturing unit to ensure that they comply with the requirements of this standard. 7.2 The sampling and result evaluation of the test shall be in accordance with the provisions of GB/T2828 or GB/T2829. 7.3 The inspection items and inspection types of fire extinguishers should be as specified in Table 6. 23
order
2
3
4
5
6
t
8| |tt||No.
Logo and instructions for use
8
JB10143-1999
Table 6
Inspection items
Appearance quality inspection (5.3)
Check function test (6.1)
Basic function test (6.2)
Electrical transient test (6.3)
Steady state damp heat test (6.4)
Vibration (sinusoidal) test (6.5)
Anti-interference test (6.6)
Voltage fluctuation test (6.7)
Inspection type
Factory inspection
Factory inspection
Routine inspection
Routine inspection
Routine inspection
Routine inspection
Routine inspection
8.1 Fire extinguishers should have signs and signs or markings indicating operation, safety, etc. as specified in GB/T 13306 and 6.1 and 6.2 of GB4717-1993.
8.2 The label or sign must include the following: a) Detector model;
b) Detector’s induction temperature value;
c) Storage temperature of the fire extinguisher.
8.3 The random technical documents of the fire extinguisher shall include: instruction manual, certificate of conformity, packing list. 8.4 The compilation method of random technical documents shall comply with the provisions of GB9969.1 and JB/T9875, and the random technical documents of the electrical system shall comply with the provisions of GB/T5226.1.
8.5 The instruction manual shall provide comprehensive information, including the use, installation, transportation, storage, repair, maintenance and refilling of fire extinguishers.
8.6 The instruction manual must explain the relevant safety content, including accidents that are easy to cause by the fire extinguisher itself, safety matters that should be paid attention to during use, etc. 9 Packaging and storage
9.1 The packaging of fire extinguishers shall comply with the provisions of JB/T8356.1 and JB/T8356.3; the packaging, storage and transportation icons and signs shall comply with the provisions of GB191.
9.2 The anti-rust period of fire extinguishers shall not be less than one and a half years. 236
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