Some standard content:
GB6245—1998
Since there is no international standard for fire pumps, the fire pump standards of major technologically advanced countries abroad vary greatly in terms of content and requirements. Therefore, this standard is revised based on the specific national conditions of fire pump production and use in my country and with reference to foreign fire pump standards. On the one hand, this standard modifies the original "Performance Requirements and Test Methods for Vehicle Fire Pumps" standard, and on the other hand, expands the scope of the standard to fire pumps. Compared with the previous version, the revised standard mainly makes the following changes: the compilation of the standard is modified according to the provisions of GB/T1.1-1993; the scope of application is expanded from vehicle fire pumps to fire pumps; the content of performance requirements and test methods for high-pressure, high-low pressure, medium-pressure and medium-low pressure vehicle fire pumps and fire pump groups is newly added; the compilation of models is unified; after many discussions and repeated coordination, the division of medium-pressure and low-pressure ranges of pumps is stipulated; it is clarified that vibration should comply with JB/T8097-95; the water pressure test method is modified; the continuous operation test method of the water diversion device is added. Fire pumps or vehicle fire pump product standards that are formulated by citing the performance requirements and test methods standards for vehicle fire pumps shall be implemented in accordance with the revised version.
This standard will replace GB6245-86 from the date of entry into force. This standard is proposed by the Ministry of Public Security of the People's Republic of China. This standard is under the jurisdiction of the Fourth Technical Subcommittee of the National Technical Committee for Fire Protection Standardization. This standard was drafted by the Shanghai Fire Science Research Institute of the Ministry of Public Security. The main drafters of this standard are: Wang Huan, Gong Xianglei, Wu Jinghua, Chen Qingyuan, Tian Hua, Min Yonglin. This standard was first issued in April 1986.
This standard was first revised in July 1998. 334
1 Scope
National Standard of the People's Republic of China
Performance requirements and test methods for fire pumps
Performance requirements and test methods for fire pumpsGB 6245—1998
Replaces GB6245—86
This standard specifies the performance requirements, test methods and inspection rules for fire pumps, including fire water pumps and fire pump groups (hereinafter referred to as pump groups).
This standard applies to fire pumps or pump groups that use water as the main fire extinguishing agent, such as vehicle fire pumps, fixed fire pumps, etc. This standard does not apply to marine fire pumps, hand-lift fire pumps, and mini-vehicle fire pumps. Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T321491 Method for determination of water pump flow rate GB 3216-89 Test methods for centrifugal pumps, mixed flow pumps, axial flow pumps and vortex pumps GB3797-89 Electronic control equipment Part 2: Electronic control equipment equipped with electronic devices GB4720-84
Electronic control equipment Part 1: Low-voltage electrical appliances and electronic control equipment JB/T 8097-—95
3 Definitions
Method for measuring and evaluating vibration of pumps
This standard adopts the following definitions.
3.1 Vehicle fire pump
A fire pump installed on the chassis of a fire truck. 3.2 Water priming time
The time from the start of the water priming device to the time when the outlet pressure gauge of the fire pump displays the pressure. 3.3 Suction depth
The height difference between the pump reference surface and the suction liquid surface, unit: m. 3.4 Low-pressure pump
A fire pump with a rated working pressure not exceeding 1.3MPa. 3.5 Medium-pressure pump
A fire pump with a rated working pressure between 1.4 and 2.5 MPa. 3.6 Medium-low pressure pump
A fire pump that can provide both medium and low pressure. 3.7 High-pressure pump
A fire pump with a rated working pressure of not less than 3.5 MPa. 3.8 High-low pressure pump
Approved by the State Administration of Quality and Technical Supervision on July 15, 1998 and implemented on June 1, 1999
A fire pump that can provide both high and low pressure. 3.9 High-low pressure combined working condition
The pump can provide both high and low pressure working conditions. 3.10 Medium-low pressure combined working condition
The pump can provide both medium and low pressure working conditions. 4 Model
GB6245—1998
4.1 The product model consists of three parts: pump characteristic code, prime mover characteristic code and main parameters, and its format is as follows:口
4.2 The representation method of pump characteristic code is shown in Table 1.0/O-口
一Enterprise customization
Main parameters
Prime mover characteristic code
Pump characteristic code
4.3 The representation method of prime mover characteristic code is shown in Table 2.4.4 The main parameters are expressed by 10 times the rated pressure and rated flow of the pump, and the representation method and units are shown in Table 3.4.5 Model example
a) Low-pressure fire pump, rated pressure 1.0MPa, rated flow 25L/s, its model is XB10/25. b) Low-pressure fire pump set driven by electric motor, rated pressure 1.0MPa, rated flow 30L/s, model XBD10/30. c) High- and low-pressure fire pump set driven by diesel engine, rated pressure high pressure 4.0MPa, low pressure 1.0MPa; rated flow at high pressure 6L/s, low pressure 40L/s, model XBC40·10/6·40. Table 1
Pump characteristics
Fire pump
Automobile fire pump
Prime mover characteristics
Electric motor
Gasoline engine
Diesel engine
High and low pressure
Medium and low pressure
Low pressure, medium pressure, high pressure
5Performance requirements
Main parameters
High pressure pressure·Low pressure pressure/High pressure flow·Low pressure flowMedium pressure pressure·Low pressure pressure/Medium pressure flow·Low pressure flowPressure/flow
MPa· MPa/L/s· L/s
MPa · MPa/L/s · L/s
MPa/L/s
5.1 Main technical parameters
5.1.1 The pump shall be subjected to performance test according to 6.8. The test results of vehicle fire pump shall comply with the provisions of Table 4, and the test results of pump group shall comply with the provisions of Table 5336
.
GB 6245-1998
5.1.2 Low-pressure vehicle fire pump shall comply with the provisions of 5.1.2.1~5.1.2.3. 5.1.2.1 Working condition 1: At the suction depth of 3m, the rated flow (Q.) and rated pressure (P,) shall be met. 5.1.2.2 Working condition 2 At the suction depth of 3m, the flow is 0.7Qm, and the working pressure shall not be less than 1.3P. . 5.1.2.3 Working condition 3: At the suction depth of 7m, the flow is 0.5Q, and the working pressure shall not be less than 1.0Pm. 5.1.3 Medium-pressure vehicle fire pumps shall comply with the provisions of 5.1.3.1 to 5.1.3.2. 5.1.3.1 Working condition 1: At a suction depth of 3m, the rated flow (Qm) and rated pressure (P) requirements shall be met. 5.1.3.2 Working condition 2: At a suction depth of 7m, the flow is 0.5Qmz, and the working pressure shall not be less than 1.0Pnz. 5.1.4 High-pressure vehicle fire pumps shall comply with the provisions of 5.1.4.1 to 5.1.4.2. Working condition 1: At a suction depth of 3m, the rated flow (Qng) and rated pressure (Png) requirements shall be met. 5. 1.4. 1
5. 1. 4.2
Working condition 2: At a suction depth of 7m, the flow is 0.5Qng, and the working pressure shall not be less than 1.0Png. 5.1.5 Medium and low pressure vehicle fire pumps shall comply with the provisions of 5.1.5.1~5.1.5.4. 5. 1. 5. 1
Working condition 1: At the suction depth of 3m, the low pressure rated flow (Q) and rated pressure (P.) requirements shall be met. Working condition 2: At the suction depth of .3m, the flow is 0.5Q, and the working pressure shall not be less than 1.8MPa. Working condition 3: At the suction depth of 7m, the flow is 0.5Q, and the working pressure shall not be less than 1.0Pn. Medium and low pressure vehicle fire pumps shall have medium and low pressure combined working conditions, except for high and low pressure vehicle fire pumps with medium pressure function. 5. 1. 5. 4
5.1.6 High and low pressure vehicle fire pumps shall comply with the provisions of 5.1.6.1~5.1.6.4. 5.1.6.1
Working Condition 1: At a suction depth of 3m, the requirements of low-pressure rated flow (Q) and rated pressure (P) shall be met. 5.1.6.2
Working Condition 2: At a suction depth of 3m, the requirements of high-pressure rated flow (Qng) and rated pressure (Png) shall be met. Working Condition 3: At a suction depth of 7m, the flow is 0.5Qn, and the working pressure shall not be less than 1.0P. High and low pressure vehicle fire pumps shall have high and low pressure combined working conditions. Electric motor fire pump sets shall comply with the provisions of 5.1.7.1, and engine fire pump sets shall comply with 5.1.7.1~5.1.7.2. 5.1.7.1
Condition 1: At the suction depth of 0m, the rated flow and rated pressure requirements shall be met. Condition 2: At the suction depth of 6m, the pressure is the rated pressure, and the flow shall not be less than 50% of the rated flow. Table 4
Rated flow
Rated pressure
Rated flow
Rated pressure
Rated flow
Rated pressure
Main parameters
Rated flow
Rated pressure
5.2 Structural requirements
Rated working conditions
20.0,25.0,30.0,35.0,40.0,45.0,50.0,55.0,60.0,65.0,70.0,75.0,80.0,85.0,90.0,95.0,100.0≤1.3
20.0,25.0,30.0,35.0,40.0,45.0,50.0,55.0,60.0,65. 0,70. 0,80. 0
4.0,5.0,6.0,7.0,8.0,9.0,10.0>3.5
Rated working condition
5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95,100,105,110,115,120,125,130,140,150,160,180,2000.3~3.0
GB 6245—1998
5.2.1 Fasteners and self-locking devices should not loosen due to vibration and other reasons. 5.2.2 The fire pump body should be cast with an arrow indicating the direction of rotation or have a clear display mark. 5.3 Anti-corrosion performance
The flow surface of the fire pump should have anti-corrosion performance against the medium. The fire pump should be tested for flow surface anti-corrosion according to 6.12, and there should be no defects that affect the performance of the fire pump after the test. 5.4 Mechanical performance
5.4.1 The fire pump should be tested for sealing according to 6.10, and the pump shell should not have defects such as leakage and sweating during the test. 5.4.2 The flow parts of the fire pump should be tested for water pressure according to 6.11, and the pump shell should not have defects such as deformation and cracks that affect the performance during the test.
5.5 Vacuum sealing performance
The fire pump should have good vacuum sealing performance. When tested according to 6.13, the vacuum drop value within 1 minute should not be greater than 2.6kPa. 5.6 Continuous operation performance
The fire pump should be tested for continuous operation according to 6.9, and the requirements of 5.6.1~5.6.4 should be met during the test. 5.6.1 The outlet pressure of the pump shall not be lower than the rated outlet pressure, and the flow rate shall meet the requirements of the rated flow rate. 5.6.2 The outer surface temperature of the bearing seat shall not exceed 75℃, and the temperature rise shall not exceed 35℃. 5.6.3 The shaft seal is well sealed and there is no linear leakage. Adjustment is allowed for the packing seal. 5.6.4 The vibration of the pump shall comply with the provisions of JB/T8097. 5.7 Water priming device
The water priming device shall comply with the provisions of 5.7.1 to 5.7.7. 5.7.1 The maximum vacuum degree of the water priming device of the pump group shall not be less than 80kPa. The maximum vacuum degree of the water priming device used for vehicle pumps shall not be less than 85kPa.
5.7.2 The fire pump shall be tested for the priming time according to 6.14, and the priming time shall comply with the provisions of Table 6. The rated flow specified in Table 6 for medium and low pressure and high and low pressure vehicle fire pumps refers to the low pressure rated flow. Table 6
Rated flow, L/s
Priming time, island
50≤Q<80
5.7.3 When tested according to 6.15, the water-priming device (except the water ring pump) shall operate continuously for 30 minutes without failure. Q≥80
5.7.4 When the pump outlet pressure water is used as the release pressure source of the water-priming device, its release pressure shall not be greater than 0.25MPa. 5.7.5 The structure of the water-priming device shall be easy to maintain. 5.7.6 The storage capacity of the lubricating fluid shall be able to meet the needs of five consecutive water-priming. 5.7.7 The water ring pump shall have antifreeze measures.
5.8 When the fire pump is equipped with a foam proportioning mixer, it shall be able to use foam liquids with no less than two mixing ratios. 5.9 Pressure-stabilizing valve
When the fire pump is equipped with a pressure-stabilizing valve, the opening pressure of the pressure-stabilizing valve shall not exceed 20kPa of the specified pressure. 5.10 Pump Group
5.10.1 All pumps used in the pump group shall be finalized and tested and comply with the provisions of this standard and relevant standards. 5.10.2 All selected prime movers shall be finalized and tested and comply with relevant standards. 5.10.3 The engine shall have good normal temperature starting performance and shall ensure smooth starting within 5 seconds. Within 20 seconds after water is introduced, the fire pump shall be able to reach the rated working condition.
5.10.4 The pump group shall be tested for performance in accordance with 6.8, and the results shall comply with the provisions of 5.1. 5.10.5 The pump group shall be tested for continuous operation in accordance with 6.9. In addition to complying with 5.6, the prime mover and power output device shall meet the following requirements: a) Work normally without water or oil leakage. : b) The engine outlet water temperature and engine oil temperature shall meet the specified requirements. 338
GB6245—1998
c) The lubricating oil temperature of the power output device shall be lower than the maximum allowable operating temperature of the lubricating oil. d) The output bearing seat temperature of the power output device shall not exceed 100℃. e) The working voltage, working current and bearing seat temperature of the motor shall be within the allowable working range. 5.10.6 The pump unit with the engine as the prime mover shall be subjected to a 10-minute overload test in accordance with 6.16. During the test, the pump unit shall operate normally without excessive vibration, oil leakage, water leakage, etc. 5.11 Operation and instrument monitoring system
5.11.1 The operating handles of the pump and pump unit shall be equipped with indicator signs. 5.11.2 Each operating mechanism shall be light and reliable. 5.11.3 The pump unit shall be equipped with an instrument monitoring system and placed in a position that is convenient for observation and operation. 5.11.3.1 The pump shall have the following instruments:
a) Fire pump pressure gauge.
b) Fire pump vacuum gauge.
The accuracy of the above-mentioned meters shall not be less than Class 2.5.
5.11.3.2 The engine pump unit shall also have the following instruments: a) Oil pressure gauge.
b) Water temperature gauge.
c) Fuel level gauge.
d) Ammeter.
e) Fire pump tachometer.
5.11.3.3 The motor pump unit shall also have the following instruments: a) Ammeter.
b) Voltmeter.
c) Fire pump tachometer (applicable to frequency modulation control). 5.12 Electronic control equipment
Electronic control equipment shall comply with the requirements of GB3797 or GB4720. 6 Test methods
6.1 Test environmental conditions
The test shall be carried out under the conditions of standard atmospheric pressure and water temperature of 20°C. When the air pressure deviates from the standard atmospheric pressure and the water temperature is not 20℃, the suction depth and vacuum degree of the water diversion device shall be corrected. 6.1.1 Correction formula for suction depth
H. = Hr - 10. 09 + (P, -- P,)/(pg) Where: H.—corrected suction depth, m,
test suction depth specified in this standard, m,
atmospheric pressure at the test site, Pa;
vaporization pressure at actual water temperature, Pa;
β—density of the transported liquid, kg/m,
g—gravitational acceleration, m/s\.
6.1.2 Correction formula for vacuum degree of water diversion device
P, = P', - P,+ 101
Where: P—
corrected vacuum degree, kPa;
P\vacuum degree actually measured during the test, kPa. 6.2 Test liquid
·(1)
(2)
GB6245--1998
The test liquid shall comply with the provisions of 5.3 of GB3216--89. 6.3 Test equipment
The test equipment shall comply with the provisions of 5.4 of GB3216--89. 6.4 Test results
The test results shall comply with the provisions of 5.5 of GB3216--89. 6.5 Test equipment
The pump shall be tested with the following accessories: a) The relevant accessories actually installed on site, the vehicle pump and the engine pump unit shall be equipped with a non-return valve. b) Or a replica exactly the same as a).
The measurement shall be carried out in accordance with 5.7.2 and 5.7.3 of GB3216--89. 6.5.1 The length of the suction pipe with filter during the test shall comply with the provisions of Table 7. Suction depth
6.6 Measurement accuracy
Suction pipe length
The measurement accuracy should comply with the provisions of 5.8 in GB3216-89. 6.7 Flow, pressure and speed measurement methods
The pressure and speed measurement methods shall comply with the provisions of Chapter 6 of GB3216-89. The pressure measuring point of the outlet pressure of the vehicle pump and the engine pump group shall be at the outer end of the check valve. Flow measurement shall be carried out in accordance with GB/T3214. 6.7.1 The flow measurement can also be carried out by a water gun flow meter (referring to a calibrated special water gun with the measurement accuracy specified in 6.6). A lined fire hose not less than 5m long shall be connected between the pump and the water gun flow meter. 6.8 Performance test
The relationship between the pressure, speed and flow of the pump shall be determined through the performance test. The test shall be carried out sequentially from the working condition with the lowest power. The test shall have sufficient duration to obtain consistent results and achieve the expected test accuracy. There shall be a certain time interval between each flow point, and the flow, pressure and speed shall be measured at the same time. The test results shall comply with the provisions of 5.1. 6.9 Operation test
6.9.1 The low-pressure vehicle pump and the engine pump group shall operate for 2 hours under working condition 1 and for 2 hours under working condition 2. The entire operation shall not be interrupted. 6.9.2 The medium- and low-pressure pumps shall operate for 2 hours under low-pressure working conditions and for 1 hour under medium-pressure working conditions and combined working conditions. The entire operation shall not be interrupted. 6.9.3 The high- and low-pressure pumps shall operate for 2 hours under low-pressure working conditions and for 1 hour under high-pressure working conditions and combined working conditions. The entire operation shall not be interrupted. 6.9.4 The pumps and motor pump groups other than the above shall operate for 4 hours under rated working conditions. 6.9.5 When the pump is undergoing the operation test, the temperature rise of the bearing shall be checked. From the start of the pump, the temperature of the bearing seat surface shall be measured every 15 minutes until the values measured three times in a row are the same; at the same time, the flow rate, outlet pressure and speed of the pump shall also be measured. The test results shall comply with the provisions of 5.6.
6.10 Sealing test
Block the pump inlet, close the outlet valve, and gradually pressurize the pump to 1.1 times the maximum pressure. Keep it at this pressure for not less than 5 minutes. You can also rely on the pressure generated by the pump itself to make it reach 1.1 times the maximum working pressure for 5 minutes. The test results should comply with the provisions of 5.4.1.
6.11 Water pressure test
Block all openings of the pump's flow-through parts, and gradually pressurize the pump parts to 1.5 times the maximum working pressure. Keep it at this pressure for 5 minutes. The test results should comply with the provisions of 5.4.2. 6.12 Corrosion resistance test
GB6245—1998
6.12.1 Before the test, carefully clean the flow-through surface of the pump with warm water. No grease or dirt should be left. Abrasives or solvents should not be used during cleaning. 6.12.2 The test solution is prepared by adding sodium fluoride to distilled water, with a concentration of 10kg/m3 ± 1kg/m3. The pump is filled with the solution and placed in a temperature environment of 35℃ ± 2℃; after 8 hours, the water is drained and then placed for 16 hours. Repeat this for five cycles. 6.12.3 After the test, drain the solution in the pump, clean the flow surface with warm water, and carefully check its corrosion. The test results should comply with the provisions of 5.3.
6.12.4 For pumps made of cast iron, cast aluminum, cast copper, and other flow parts made of highly corrosion-resistant materials such as stainless steel, bronze or aluminum alloy, the above test may not be carried out.
6.13 Vacuum sealing test
6.13.1 During the test, the pump is connected to a standard suction pipe. The length of the suction pipe should comply with the provisions of 6.5.1. 6.13.2 Drain the remaining water in the pump and the suction pipe, seal the suction pipe inlet to prevent air leakage; close the outlet valve, use the water diversion device to remove the air in the pump and the suction pipe to the maximum vacuum, immediately close the water diversion device, and measure the vacuum drop value within 1 minute. The result should comply with the provisions of 5.5.
6.14 Water diversion time test
When the pump is tested for water diversion time on the open test bench, a standard water diversion pipe with a filter should be connected, and its length should comply with the provisions of 6.5.1. The suction depth of the vehicle pump is 7m, and the suction depth of the pump group is 6m. The number of tests should not be less than three times. The test results should comply with the provisions of 5.7.2.
6.15 Continuous operation test of water diversion device
Install a 0.4-level vacuum gauge at the inlet of the water diversion device, control the lubricating liquid supply valve at the normal supply position, adjust the speed, make the vacuum reach the specified value, and measure the flow rate of the lubricating liquid by the volumetric method. Observe and record the vacuum degree, lubricating fluid flow, the temperature of the housing at the bearing and shaft seal and the middle of the device housing every 5 minutes. The test results shall comply with the provisions of 5.7. 6.16 Overload test
When the suction depth of the pump group is 3m, adjust the engine throttle and the pump outlet valve so that the pump flow is maintained at the rated flow and the pump pressure is maintained at 1.1 times the rated pressure. The test is continuously operated for 10 minutes. The test results shall comply with the provisions of 5.10.6. 6.17 Normal temperature engine start test
The start test is carried out in a cold state at normal temperature (5℃～35℃) according to the engine operating procedures. The start time is from pressing the start button to releasing the button when the engine can maintain idle speed. After the engine speed stabilizes, quickly adjust the throttle and the pump outlet valve to make the pump reach the rated working condition as soon as possible, and record the time from the engine speed increase to the pump reaching the rated working condition. After the test is completed, stop the machine and start it again after an interval of 2 minutes. At least two of the three tests shall comply with the provisions of 5.10.3. 7 Inspection rulesbzxZ.net
7.1 Inspection categories
7.1.1 Type inspection
Type inspection shall be carried out in any of the following cases, and the sample for type inspection shall be one unit. a) When new products are identified or old products are converted to new products; b) After formal production, when there are major changes in raw materials, Wangyi and design. 7.1.2 Factory inspection
The pump shall be inspected and qualified by the factory inspection department one by one and the certificate of conformity shall be issued before it can be shipped out of the factory. 7.2 Inspection items
7.2.1 The contents of type inspection are all items specified in this standard, and the inspection results shall meet the requirements of the standard. 7.2.2 In addition to the requirements of 5.2, 5.4, 5.5, 5.7 and 5.11, the factory inspection shall also check whether each operating point meets the requirements of 5.1. During the inspection, if one indicator fails, twice the number of products in the same batch shall be sampled to re-inspect the item. If one item is still unqualified after re-inspection, the batch of products will be judged as unqualified products.2 The test solution is prepared by adding sodium fluoride to distilled water, with a concentration of 10kg/m3 ± 1kg/m3. The pump is filled with the solution and placed in a temperature environment of 35℃ ± 2℃; after 8 hours, the water is drained and then placed for 16 hours. Repeat this for five cycles. 6.12.3 After the test, drain the solution in the pump, clean the flow surface with warm water, and carefully check its corrosion. The test results should comply with the provisions of 5.3.
6.12.4 For pumps made of cast iron, cast aluminum, cast copper, and other flow parts made of highly corrosion-resistant materials such as stainless steel, bronze or aluminum alloy, the above test may not be carried out.
6.13 Vacuum sealing test
6.13.1 During the test, the pump is connected to a standard suction pipe. The length of the suction pipe should comply with the provisions of 6.5.1. 6.13.2 Drain the remaining water in the pump and the suction pipe, seal the suction pipe inlet to prevent air leakage; close the outlet valve, use the water diversion device to remove the air in the pump and the suction pipe to the maximum vacuum, immediately close the water diversion device, and measure the vacuum drop value within 1 minute. The result should comply with the provisions of 5.5.
6.14 Water diversion time test
When the pump is tested for water diversion time on the open test bench, a standard water diversion pipe with a filter should be connected, and its length should comply with the provisions of 6.5.1. The suction depth of the vehicle pump is 7m, and the suction depth of the pump group is 6m. The number of tests should not be less than three times. The test results should comply with the provisions of 5.7.2.
6.15 Continuous operation test of water diversion device
Install a 0.4-level vacuum gauge at the inlet of the water diversion device, control the lubricating liquid supply valve at the normal supply position, adjust the speed, make the vacuum reach the specified value, and measure the flow rate of the lubricating liquid by the volumetric method. Observe and record the vacuum degree, lubricating fluid flow, the temperature of the housing at the bearing and shaft seal and the middle of the device housing every 5 minutes. The test results shall comply with the provisions of 5.7. 6.16 Overload test
When the suction depth of the pump group is 3m, adjust the engine throttle and the pump outlet valve so that the pump flow is maintained at the rated flow and the pump pressure is maintained at 1.1 times the rated pressure. The test is continuously operated for 10 minutes. The test results shall comply with the provisions of 5.10.6. 6.17 Normal temperature engine start test
The start test is carried out in a cold state at normal temperature (5℃～35℃) according to the engine operating procedures. The start time is from pressing the start button to releasing the button when the engine can maintain idle speed. After the engine speed stabilizes, quickly adjust the throttle and the pump outlet valve to make the pump reach the rated working condition as soon as possible, and record the time from the engine speed increase to the pump reaching the rated working condition. After the test is completed, stop the machine and start it again after an interval of 2 minutes. At least two of the three tests shall comply with the provisions of 5.10.3. 7 Inspection rules
7.1 Inspection categories
7.1.1 Type inspection
Type inspection shall be carried out in any of the following cases, and the sample for type inspection shall be one unit. a) When new products are identified or old products are converted to new products; b) After formal production, when there are major changes in raw materials, Wangyi and design. 7.1.2 Factory inspection
The pump shall be inspected and qualified by the factory inspection department one by one and the certificate of conformity shall be issued before it can be shipped out of the factory. 7.2 Inspection items
7.2.1 The contents of type inspection are all items specified in this standard, and the inspection results shall meet the requirements of the standard. 7.2.2 In addition to the requirements of 5.2, 5.4, 5.5, 5.7 and 5.11, the factory inspection shall also check whether each operating point meets the requirements of 5.1. During the inspection, if one indicator fails, twice the number of products in the same batch shall be sampled to re-inspect the item. If one item is still unqualified after re-inspection, the batch of products will be judged as unqualified products.2 The test solution is prepared by adding sodium fluoride to distilled water, with a concentration of 10kg/m3 ± 1kg/m3. The pump is filled with the solution and placed in a temperature environment of 35℃ ± 2℃; after 8 hours, the water is drained and then placed for 16 hours. Repeat this for five cycles. 6.12.3 After the test, drain the solution in the pump, clean the flow surface with warm water, and carefully check its corrosion. The test results should comply with the provisions of 5.3.
6.12.4 For pumps made of cast iron, cast aluminum, cast copper, and other flow parts made of highly corrosion-resistant materials such as stainless steel, bronze or aluminum alloy, the above test may not be carried out.
6.13 Vacuum sealing test
6.13.1 During the test, the pump is connected to a standard suction pipe. The length of the suction pipe should comply with the provisions of 6.5.1. 6.13.2 Drain the remaining water in the pump and the suction pipe, seal the suction pipe inlet to prevent air leakage; close the outlet valve, use the water diversion device to remove the air in the pump and the suction pipe to the maximum vacuum, immediately close the water diversion device, and measure the vacuum drop value within 1 minute. The result should comply with the provisions of 5.5.
6.14 Water diversion time test
When the pump is tested for water diversion time on the open test bench, a standard water diversion pipe with a filter should be connected, and its length should comply with the provisions of 6.5.1. The suction depth of the vehicle pump is 7m, and the suction depth of the pump group is 6m. The number of tests should not be less than three times. The test results should comply with the provisions of 5.7.2.
6.15 Continuous operation test of water diversion device
Install a 0.4-level vacuum gauge at the inlet of the water diversion device, control the lubricating liquid supply valve at the normal supply position, adjust the speed, make the vacuum reach the specified value, and measure the flow rate of the lubricating liquid by the volumetric method. Observe and record the vacuum degree, lubricating fluid flow, the temperature of the housing at the bearing and shaft seal and the middle of the device housing every 5 minutes. The test results shall comply with the provisions of 5.7. 6.16 Overload test
When the suction depth of the pump group is 3m, adjust the engine throttle and the pump outlet valve so that the pump flow is maintained at the rated flow and the pump pressure is maintained at 1.1 times the rated pressure. The test is continuously operated for 10 minutes. The test results shall comply with the provisions of 5.10.6. 6.17 Normal temperature engine start test
The start test is carried out in a cold state at normal temperature (5℃～35℃) according to the engine operating procedures. The start time is from pressing the start button to releasing the button when the engine can maintain idle speed. After the engine speed stabilizes, quickly adjust the throttle and the pump outlet valve to make the pump reach the rated working condition as soon as possible, and record the time from the engine speed increase to the pump reaching the rated working condition. After the test is completed, stop the machine and start it again after an interval of 2 minutes. At least two of the three tests shall comply with the provisions of 5.10.3. 7 Inspection rules
7.1 Inspection categories
7.1.1 Type inspection
Type inspection shall be carried out in any of the following cases, and the sample for type inspection shall be one unit. a) When new products are identified or old products are converted to new products; b) After formal production, when there are major changes in raw materials, Wangyi and design. 7.1.2 Factory inspection
The pump shall be inspected and qualified by the factory inspection department one by one and the certificate of conformity shall be issued before it can be shipped out of the factory. 7.2 Inspection items
7.2.1 The contents of type inspection are all items specified in this standard, and the inspection results shall meet the requirements of the standard. 7.2.2 In addition to the requirements of 5.2, 5.4, 5.5, 5.7 and 5.11, the factory inspection shall also check whether each operating point meets the requirements of 5.1. During the inspection, if one indicator fails, twice the number of products in the same batch shall be sampled to re-inspect the item. If one item is still unqualified after re-inspection, the batch of products will be judged as unqualified products.
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