CN115931342A - Comprehensive test bed for safety valve and comprehensive test method - Google Patents

Comprehensive test bed for safety valve and comprehensive test method Download PDF

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Publication number
CN115931342A
CN115931342A CN202310243706.XA CN202310243706A CN115931342A CN 115931342 A CN115931342 A CN 115931342A CN 202310243706 A CN202310243706 A CN 202310243706A CN 115931342 A CN115931342 A CN 115931342A
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pressure
safety valve
tested
test
gas
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CN115931342B (en
Inventor
何明
孙瑞亮
李豪
刘志龙
朱全琛
陶波
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HEFEI GENERAL ENVIRONMENT CONTROL TECHNOLOGY CO LTD
Hefei General Machinery Research Institute Co Ltd
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HEFEI GENERAL ENVIRONMENT CONTROL TECHNOLOGY CO LTD
Hefei General Machinery Research Institute Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Abstract

The invention discloses a comprehensive test bed for a safety valve and a comprehensive test method, which relate to the technical field of safety valve test and comprise the following steps: the device comprises a supercharging device, a first pressure container, a temperature adjusting device, an air path adjusting device, a second pressure container, a safety valve test branch, a safety valve to be tested and a numerical control center which are sequentially connected along the gas transmission direction; the safety valve to be tested is placed in the environment adjusting bin, and different working environment temperatures are provided for the safety valve to be tested; the safety valve to be measured is provided with a spraying device and an image acquisition device, the spraying device is used for spraying leakage measurement liquid to the safety valve to be measured, and the image acquisition device is used for acquiring a surface image of the safety valve to be measured. The safety valve test system can simulate different working temperatures and different working pressures of the safety valve and can also simulate different working environments of the safety valve, so that various tests can be performed on the safety valve to be tested under different working temperatures, different working pressures and different working environments, and the working performance of the safety valve to be tested can be comprehensively tested.

Description

Comprehensive test bed for safety valve and comprehensive test method
Technical Field
The invention relates to the technical field of safety valve testing, in particular to a comprehensive test bed for a safety valve and a comprehensive test method.
Background
With the vigorous development of rail transit, high-speed railway trains and urban rail trains work under various external conditions of different temperatures, humidity and the like, wherein a wind source device for providing clean high-pressure gas power for a braking system is a safety-related core device.
The compressor in the air source device finishes compressing atmospheric air and stores subsequent purified high-pressure air into the high-pressure air storage tank, and the safety valve is used for adjusting the air pressure in the air storage tank to be within a safety air pressure threshold value.
The safety valve is a valve for safety protection, and is an automatic pressure relief valve, its opening and closing member is under the action of external force and is in the normally closed state, when the pressure of medium in the equipment or pipeline is raised and exceeds the defined safety value, the valve is automatically opened, and a rated quantity of medium is discharged to the exterior of system so as to prevent the pressure of medium in the pipeline or equipment from exceeding the defined safety value, and when the pressure of medium in the pipeline or equipment is recovered to normal state, the valve is closed again and can prevent medium from continuously flowing out.
Therefore, it is necessary to perform a test on the safety valve to test the working performance of the safety valve.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a comprehensive test bed for a safety valve, which can simulate different working temperatures and different working pressures of the safety valve and can also simulate different working environments of the safety valve, so that various tests can be performed on the safety valve to be tested under different working temperatures, different working pressures and different working environments, and the working performance of the safety valve to be tested can be comprehensively tested.
In order to achieve the purpose, the invention adopts the following technical scheme that:
a combination test stand for a safety valve, the combination test stand comprising: the device comprises a supercharging device, a first pressure container, a temperature adjusting device, an air path adjusting device, a second pressure container, a safety valve test branch and a safety valve to be tested, which are sequentially connected along the gas transmission direction;
the pressurizing device is used for pressurizing gas and inputting the pressurized gas into the first pressure container; the temperature adjusting device is used for adjusting the temperature of the gas flowing into the second pressure container; the gas path adjusting device is used for adjusting the gas flow flowing into the second pressure container; the second pressure container is used for storing gas with set pressure and set temperature and is used for testing the safety valve to be tested; the safety valve to be tested is connected with the second pressure container through a safety valve test branch;
the second pressure vessel is also connected with a discharge device, and the discharge device is used for discharging the gas in the second pressure vessel;
the first pressure container and the second pressure container are both provided with a temperature sensor and a pressure sensor which are used for collecting the gas temperature and the gas pressure in the pressure containers;
the comprehensive test bed also comprises an environment adjusting bin, the safety valve to be tested is placed in the environment adjusting bin, and the environment adjusting bin is used for providing different working environment temperatures for the safety valve to be tested;
the comprehensive test bed also comprises a spraying device and an image acquisition device, wherein the spraying device is used for spraying leakage measurement liquid to the safety valve to be tested, and the image acquisition device is used for acquiring a surface image of the safety valve to be tested;
the comprehensive test bed also comprises a numerical control center, wherein the numerical control center is connected with each sensor and is used for receiving the acquired data of each sensor; the numerical control center is also connected with each device and used for controlling each device.
Preferably, the supercharging device comprises a high-pressure gas path and a normal-pressure gas path which are connected in parallel, the high-pressure gas path is provided with a first stop valve and a booster pump, and the normal-pressure gas path is provided with a second stop valve; the discharging device comprises a second one-way valve, a third regulating valve and a silencer which are sequentially connected along the gas transmission direction.
Preferably, the temperature adjusting means includes a cooler and a heater.
Preferably, the gas path adjusting device comprises a third stop valve, a first one-way valve and an adjusting valve assembly which are sequentially connected along the gas transmission direction; the regulating valve assembly comprises a first regulating valve and a second regulating valve which are connected in parallel; the first regulating valve and the second regulating valve are used for regulating air quantity, and the regulating precision of the first regulating valve is smaller than that of the second regulating valve.
Preferably, the spraying device comprises a liquid storage tank, a liquid pump, a third pressure sensor and a spraying head which are sequentially connected along the liquid flow direction; the liquid storage pot is used for storing leakage measuring liquid, the liquid pump is used for adjusting hydraulic pressure, the third pressure sensor is used for measuring hydraulic pressure, and the spray header is located above the safety valve to be measured and used for spraying the safety valve to be measured.
Preferably, the camera of the image acquisition device is arranged on the side of the safety valve to be measured, and performs rotary displacement along the surface of the safety valve to be measured, so as to acquire surface images of the safety valve to be measured at various angles.
Preferably, the comprehensive test bed further comprises a gas purification device for purifying the gas input into the first pressure container; the purification treatment comprises dust removal, oil removal and water removal; the gas purification device comprises a dust remover, an oil remover and a water remover which are sequentially connected along the gas transmission direction.
The invention also provides a comprehensive test method of the comprehensive test bed for the safety valve, which is used for carrying out the air tightness test on the safety valve to be tested by utilizing the comprehensive test bed, and the specific method is as follows:
s11, mounting the safety valve to be tested on a safety valve test branch of the comprehensive test bed, and recording factory parameters of the safety valve to be tested into a numerical control center as calibration parameters;
s12, connecting the input end of the supercharging device with an air source, inputting air into the supercharging device, and controlling the supercharging device by the numerical control center to input high-pressure air into the first pressure container;
s13, the numerical control center opens the gas path adjusting device, inputs the high-pressure gas stored in the first pressure container into the second pressure container and the safety valve test branch, and closes the gas path adjusting device after adjusting the gas pressure in the second pressure container to reach the set pressure by controlling the gas path adjusting device; wherein the set pressure is A% of the factory set pressure of the safety valve to be tested;
s14, the numerical control center opens a spraying device, sprays leakage measuring liquid to the safety valve to be measured, and closes the spraying device after the surface of the safety valve to be measured is soaked with the leakage measuring liquid;
s15, the numerical control center opens the image acquisition device, acquires the surface image of the safety valve to be detected at the current moment, namely the moment T1, and sends the surface image of the safety valve to be detected at the moment T1 to the numerical control center;
s16, after the time interval delta T, collecting a surface image of the safety valve to be detected at the current moment, namely the moment T2, and sending the surface image of the safety valve to be detected at the moment T2 to a numerical control center; t2= T1+ Δ T;
s17, the numerical control center carries out comparative analysis on the surface images of the safety valve to be tested at the front moment and the rear moment according to the surface images of the safety valve to be tested at the front moment and the rear moment, namely the moment T1 and the moment T2:
counting the number of bubbles in the surface images at the two moments before and after, and the positions and the circumferences of all the bubbles, wherein if the number of the bubbles in the surface image at the moment T2 is greater than the number of the bubbles in the surface image at the moment T1, or the circumference of a certain bubble in the surface image at the moment T2 is greater than the circumference of the bubble at the corresponding position in the surface image at the moment T1, the safety valve to be tested leaks air under the factory setting pressure of A%; otherwise, indicating that the safety valve to be tested does not generate air leakage under the factory setting pressure of A%;
s18, the numerical control center control gas circuit adjusting device pressurizes a second pressure container, so that the gas pressure in the second pressure container is increased by delta a% each time until the second pressure container is pressurized to a factory setting pressure, and the airtightness of the safety valve to be tested under the factory setting pressure of (A + delta a)%, (A +2 delta a)% and (A +3 delta a)% is respectively tested according to the mode of the steps S14 to S17;
and S19, controlling a temperature adjusting device by the numerical control center, adjusting the gas temperature in the second pressure container, and testing the air tightness of the safety valve to be tested at different gas temperatures respectively according to the mode of the steps S14-S18.
Preferably, a comprehensive test bed is used for sequentially carrying out a discharge pressure test, a pressure maintaining test, a recoil pressure test, a pulse pressure withstanding test and a reliability test on the safety valve to be tested, and the specific method is as follows:
s21, mounting the safety valve to be tested on a safety valve test branch of the comprehensive test bed, and recording factory parameters of the safety valve to be tested into a numerical control center as calibration parameters;
s22, connecting the input end of the supercharging device with an air source, inputting air into the supercharging device, and controlling the supercharging device by the numerical control center to input high-pressure air into the first pressure container;
s23, the numerical control center opens the gas path adjusting device and inputs the high-pressure gas stored in the first pressure container into the second pressure container and the safety valve test branch;
s24, carrying out a discharge pressure test on the safety valve to be tested:
s241, the numerical control center controls the gas path adjusting device to pressurize the second pressure container, so that the gas pressure in the second pressure container reaches the set pressure, and then the gas path adjusting device is closed; wherein the set pressure is A% of the factory set pressure of the safety valve to be tested;
s242, the numerical control center controls the gas circuit adjusting device to continuously pressurize the second pressure container, the pressurizing speed is lower than the pressurizing speed in the step S241, the numerical control center judges the pressure drop in the second pressure container in real time according to the data collected by the pressure sensor on the second pressure container, if the pressure drop rate exceeds a set threshold value, the gas pressure in the second pressure container when the first pressure drop rate exceeds the set threshold value is recorded, and the gas pressure in the second pressure container at the moment is used as the actual setting pressure of the safety valve to be tested; otherwise, continuously pressurizing until the first pressure drop rate exceeds a set threshold value, and obtaining the actual set pressure of the safety valve to be tested;
s243, after the first pressure drop rate exceeds the set threshold, the numerical control center controls the gas path adjusting device to continuously pressurize the second pressure container, the pressurizing speed is lower than the pressurizing speed in the step S241, the numerical control center judges the pressure drop in the second pressure container in real time according to the data collected by the pressure sensor on the second pressure container, if the pressure drop rate exceeds the set threshold, the gas pressure in the second pressure container when the second pressure drop rate exceeds the set threshold is recorded, and the gas pressure in the second pressure container at the moment is used as the actual discharge pressure of the safety valve to be tested; if not, continuously pressurizing until the second pressure drop rate exceeds a set threshold value, and obtaining the actual discharge pressure of the safety valve to be tested;
if the discharge pressure test of the safety valve to be tested is qualified, namely the actual discharge pressure and the actual setting pressure of the safety valve to be tested both meet the error range of the calibration parameters, carrying out the next test, otherwise, terminating the test and reporting the reason for terminating the test;
s25, carrying out a pressure maintaining test on the safety valve to be tested:
s251, the numerical control center controls the gas path adjusting device to close the gas path adjusting device after the gas pressure in the second pressure container reaches the set pressure; wherein the set pressure is A% of the actual set pressure of the safety valve to be tested;
s252, the numerical control center judges the pressure drop in the second pressure container in real time according to the data acquired by the pressure sensor on the second pressure container, and if the pressure drop rate exceeds a set threshold or the pressure drop exceeds a set value within a set time, the safety valve to be tested does not maintain pressure under the actual set pressure of A%; otherwise, the safety valve to be tested is subjected to pressure maintaining under the factory setting pressure of A%;
s253, the numerical control center control gas circuit adjusting device boosts the second pressure container to enable the gas pressure in the second pressure container to be increased by delta a% each time until the gas pressure is boosted to the actual setting pressure, and the pressure maintaining performance of the safety valve to be tested under the actual setting pressure of (A + delta a)% and the actual setting pressure of (A +2 delta a)% and the actual setting pressure is tested respectively according to the mode of the step S252;
if the pressure maintaining test of the safety valve to be tested is qualified, namely the safety valve to be tested has pressure maintaining performance, carrying out the next test, otherwise, terminating the test and reporting the reason for terminating the test;
s26, carrying out a recoil pressure test on the safety valve to be tested:
s261, the numerical control center controls the gas path adjusting device to close the gas path adjusting device after the gas pressure in the second pressure container reaches the set pressure; setting the pressure as the actual discharge pressure of the safety valve to be tested;
s262, the numerical control center opens the discharge device, the gas in the second pressure container is discharged, namely, the pressure is reduced, the numerical control center judges the pressure drop in the second pressure container in real time according to the data collected by the pressure sensor on the second pressure container until the gas pressure in the second pressure container is unchanged, namely, the pressure drop is 0, the gas pressure in the second pressure container when the pressure drop is 0 is recorded and is used as the actual recoil pressure of the safety valve to be tested;
if the recoil pressure test of the safety valve to be tested is qualified, namely the actual recoil pressure of the safety valve to be tested meets the error range of the calibration parameters, carrying out the next test, otherwise, terminating the test and reporting the test termination reason;
s27, carrying out a pulse pressure resistance test on the safety valve to be tested:
s271, the numerical control center controls the gas path adjusting device to close the gas path adjusting device after the gas pressure in the second pressure container reaches the set pressure; the set pressure is the actual set pressure of the safety valve to be measured;
s272, the numerical control center opens the discharge device, and discharges the gas in the second pressure container by using the discharge device until the gas pressure in the second pressure container is discharged to zero;
and S273, the steps S271 to S272 are repeated, and after a plurality of times of circulation, whether the safety valve to be detected is damaged is judged, wherein the judgment mode is as follows:
according to the mode of the steps S24 and S26, carrying out a discharge pressure test and a recoil pressure test on the safety valve to be tested again to obtain the setting pressure, the discharge pressure and the recoil pressure of the safety valve to be tested after the pulse pressure-resistant test, judging whether the setting pressure, the discharge pressure and the recoil pressure are in the error range of the calibration parameters or not, and if the setting pressure, the discharge pressure and the recoil pressure are in the error range of the calibration parameters, indicating that the safety valve to be tested has pulse pressure resistance; otherwise, the safety valve to be tested does not have pulse pressure resistance;
if the pulse pressure resistance test of the safety valve to be tested is qualified, namely the safety valve to be tested has pulse pressure resistance, carrying out the next test, otherwise, terminating the test and reporting the reason for terminating the test;
s28, carrying out reliability test on the safety valve to be tested:
s281, the numerical control center controls the temperature adjusting device to adjust the temperature of the gas in the second pressure container;
s282, carrying out a discharge pressure test, a pressure maintaining test, a recoil pressure test and a pulse pressure resistance test on the safety valve to be tested in sequence at different gas temperatures according to the mode of the steps S24-S27, and testing the setting pressure, the discharge pressure, the pressure maintaining property, the recoil pressure and the pulse pressure resistance of the safety valve to be tested at different gas temperatures;
if the safety valve to be tested is qualified in all tests at different gas temperatures, the test is finished, and if the safety valve to be tested is unqualified in a certain test at a certain gas temperature, the test is terminated and the reason for terminating the test is reported.
Preferably, a comprehensive test bed is used for carrying out a working environment test on the safety valve to be tested, and the specific method is as follows:
s31, mounting the safety valve to be tested on a safety valve test branch of the comprehensive test bed, and recording factory parameters of the safety valve to be tested into a numerical control center as calibration parameters;
s32, connecting the input end of the supercharging device with an air source, inputting air into the supercharging device, and controlling the supercharging device by the numerical control center to input high-pressure air into the first pressure container;
s33, the numerical control center opens the gas path adjusting device, and high-pressure gas stored in the first pressure container is input into the second pressure container and the safety valve test branch;
s34, the numerical control center controls the environment adjusting bin to adjust the working environment temperature of the safety valve to be measured;
s35, performing various tests on the safety valve to be tested at various working environment temperatures respectively, and testing the working performance of the safety valve to be tested at different working environment temperatures
The invention has the advantages that:
(1) The safety valve test device can simulate different working temperatures and different working pressures of the safety valve and can also simulate different working environments of the safety valve, so that various tests including an air tightness test, a discharge pressure test, a pressure maintaining test, a recoil pressure test, a pulse pressure-resistant test, a reliability test and a working environment test can be performed on the safety valve to be tested under different working temperatures, different working pressures and different working environments, and the working performance of the safety valve to be tested can be comprehensively tested.
(2) The invention provides the test air volume for the whole comprehensive test bed after the first pressure container is charged with the scalar air volume by the aid of the supercharging device at one time. Because the second pressure vessel is a small pressure vessel and involves multiple deflation and inflation, a certain amount of high-pressure reference is reserved in the large pressure vessel, namely the first pressure vessel, and then the small pressure vessel can be continuously inflated, so that the frequent operation of a booster pump compressor is avoided.
(3) The invention utilizes the cooler and the heater in the temperature adjusting device to lead the comprehensive test bed to simulate different working temperatures, thereby facilitating the completion of the working performance test of the safety valve to be tested at different working temperatures.
(4) According to the invention, the gas path adjusting device is used for inputting gas to the second pressure container, the first adjusting valve is used for roughly adjusting the gas flow, and the second adjusting valve is used for finely adjusting the gas flow, so that the gas pressure in the second pressure container is accurately adjusted, and the comprehensive test bed can simulate different working pressures, so that the working performance test of the safety valve to be tested can be conveniently completed under different working pressures.
(5) The gas purification device is used for purifying the gas, so that the influence of dust in the gas is reduced, the service life of the comprehensive test bed is prolonged, and the measurement error of working performance parameters is reduced.
(6) The air tightness test of the safety valve to be tested can be automatically completed based on the spraying device, the image acquisition device and the target identification.
(7) The invention provides a comprehensive test method on the basis of a comprehensive test bed, which comprises an air tightness test, a discharge pressure test, a pressure maintaining test, a recoil pressure test, a pulse pressure-resistant test, a reliability test and a working environment test, has comprehensive test items, and ensures comprehensive test of the working performance of the safety valve to be tested.
Drawings
Fig. 1 is an overall schematic view of a comprehensive test bed for a safety valve according to the present invention.
Description of reference numerals:
1-a first stop valve, 2-a booster pump, 3-a second stop valve, 4-a dust remover, 5-an oil remover, 6-a dehydrator, 7-a first pressure vessel, 8-a first temperature sensor, 9-a first pressure sensor, 10-a cooler, 11-a heater, 12-a third stop valve, 13-a first check valve, 14-a first regulating valve, 15-a second regulating valve, 16-a second pressure vessel, 17-a second temperature sensor, 18-a second pressure sensor, 19-a second check valve, 20-a third regulating valve, 21-a muffler, 22-a fifth stop valve, 23-an environment adjusting bin, 24-a second safety valve to be tested, 25-a fourth stop valve, 26-a first safety valve to be tested, 27-a camera, 29-a liquid pump, 30-a third pressure sensor, 31 a shower head and 32-a numerical control center.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a comprehensive test bed for a safety valve according to the present invention includes: the device comprises a supercharging device, a gas purification device, a first pressure container 7, a temperature regulation device, a gas circuit regulation device, a second pressure container 16, a discharge device, a safety valve test branch, a safety valve to be tested, an environment regulation bin 23, a spraying device, an image acquisition device, a data acquisition circuit, a device control circuit and a data processing and control center, namely a numerical control center 32.
The supercharging device comprises a high-pressure gas circuit and a normal-pressure gas circuit which are connected in parallel, a first stop valve 1 and a booster pump 2 are arranged on the high-pressure gas circuit, a second stop valve 3 is arranged on the normal-pressure gas circuit, the parallel input ends of the high-pressure gas circuit and the normal-pressure gas circuit, namely the input end of the supercharging device, are used for inputting gas, and the parallel output ends of the high-pressure gas circuit and the normal-pressure gas circuit, namely the output end of the supercharging device, are connected with the input end of the gas purification device; the high-pressure gas circuit is used for pressurizing gas.
The gas purification device comprises a dust remover 4, an oil remover 5 and a dehydrator 6 which are sequentially connected along the gas transmission direction; the gas purification device is used for purifying gas, and comprises dust removal, oil removal and water removal.
The output end of the gas purification device, namely the output end of the dehydrator 6 is connected with the input end of the first pressure container 7; the output end of the first pressure container 7 is connected with the input end of the temperature adjusting device; the first pressure container 7 is provided with a first temperature sensor 8 and a first pressure sensor 9 which are used for respectively measuring the gas temperature and the gas pressure in the first pressure container 7; the first pressure container 7 is used for providing test air for the whole test bed after being filled with calibration air for one time.
The temperature adjusting device comprises a cooler 10 and a heater 11 which are sequentially connected along the gas transmission direction; the temperature adjusting device is used for adjusting the gas temperature, namely adjusting the inlet temperature of the safety valve to be tested, supporting the test bed to simulate different working temperatures, and completing the working performance test of the safety valve to be tested at the simulated different working temperatures; the output end of the temperature adjusting device, namely the output end of the heater 11, is connected with the input end of the air path adjusting device.
The gas path adjusting device comprises a third stop valve 12, a first one-way valve 13 and an adjusting valve component which are sequentially connected along the gas transmission direction; the regulating valve assembly comprises a first regulating valve 14 and a second regulating valve 15 which are connected in parallel; the input end of the first check valve 13 is connected with the output end of the third stop valve 12, the output end of the first check valve 13 is connected with the input end of the regulating valve component, namely the parallel input ends of the first regulating valve 14 and the second regulating valve 15, and the output end of the regulating valve component, namely the parallel output ends of the first regulating valve 14 and the second regulating valve 15, is connected with the output end of the second pressure container 16; the first regulating valve 14 is used for coarse air regulation, and the second regulating valve 15 is used for fine air regulation. The gas circuit adjusting device is used for adjusting the working pressure of the safety valve to be tested, supporting the test bed to simulate different pressure conditions and completing the working performance test of the safety valve to be tested under the simulated different pressure conditions.
A first output of the second pressure vessel 16 is connected to an input of a discharge device; the discharge device comprises a second one-way valve 19, a third regulating valve 20 and a silencer 21 which are sequentially connected along the gas transmission direction; the output end of the discharge device is used for discharging gas outwards.
A second output end of the second pressure container 16 is connected with an input end of the safety valve test branch; the second pressure container 16 is provided with a second temperature sensor 17 and a second pressure sensor 18, which are used for respectively measuring the gas temperature and the gas pressure in the second pressure container 16; the second pressure vessel 16 is used to provide test gas for a single type of test that meets temperature and pressure conditions. The tail end, namely the output end, of the safety valve test branch is connected with a safety valve to be tested.
In the invention, the safety valve to be tested is placed in an environment adjusting bin 23, and the environment adjusting bin 23 is used for providing different working environment temperatures for the safety valve to be tested; or the safety valve to be detected is provided with a spraying device and an image acquisition device, wherein the spraying device is used for spraying leakage measurement liquid to the safety valve to be detected, and the image acquisition device is used for acquiring a surface image of the safety valve to be detected; or, the safety valve to be tested is placed in the environment adjusting bin 23 and is provided with a spraying device and an image acquisition device.
In this embodiment, consider the size of combined test platform, because spray set and image acquisition device's occupation space is great, consequently, do not set up spray set and image acquisition device in the environmental conditioning storehouse, but the solitary environmental conditioning storehouse that sets up respectively to and spray set and image acquisition device, as shown in fig. 1, combined test platform provides two relief valve test branch roads, is the test branch road of first relief valve test branch road and second relief valve respectively for carry out the test of different projects to two relief valves that await measuring simultaneously.
A fourth stop valve 25 is arranged on the first safety valve test branch, and the last output end of the first safety valve test branch is connected with a first safety valve 26 to be tested; the first valve 26 to be tested is equipped with a spray device and an image acquisition device. The first safety valve test branch is used for performing an air tightness test, a discharge pressure test, a pressure maintaining test, a recoil pressure test, a pulse pressure test and a reliability test on the first safety valve 26 to be tested.
A fifth stop valve 22 is arranged on the second safety valve test branch, and the output end of the second safety valve test branch is connected with a second safety valve 24 to be tested; the second safety valve to be tested 24 is provided with an environment adjusting bin 23, that is, the second safety valve to be tested 24 is located in the environment adjusting bin 23, the environment adjusting bin 23 provides the second safety valve to be tested 24 with a working environment temperature of-40 ℃ to +65 ℃, the second safety valve to be tested is used for simulating an extreme working environment of burning sun and severe cold, and the working performance of the second safety valve to be tested 24 under the extreme working environment can be tested. The second safety valve test branch is used for performing a discharge pressure test, a pressure maintaining test, a recoil pressure test, a pulse pressure withstanding test and a reliability test of the second safety valve 24 to be tested in an extreme working environment.
In this embodiment, when the first safety valve 26 to be tested is subjected to the air-tight test, the discharge pressure test, the pressure holding test, the recoil pressure test, the pulse withstand voltage test, and the reliability test in this order, the fourth stop valve 25 is opened and the fifth stop valve 22 is closed. When a discharge pressure test, a pressure maintaining test, a recoil pressure test, a pulse pressure withstanding test and a reliability test are sequentially performed on the second safety valve 24 to be tested at each working environment temperature, the fourth stop valve 25 is closed and the fifth stop valve 22 is opened.
The spraying device comprises a liquid storage tank 28, a liquid pump 29, a third pressure sensor 30 and a spraying head 31 which are sequentially connected along the liquid flow direction; the liquid storage tank 28 is used for storing leakage measuring liquid, the liquid pump 29 is used for adjusting hydraulic pressure, the third pressure sensor 30 is used for measuring hydraulic pressure, and the spray header 31 is located above the safety valve to be tested and used for spraying the safety valve to be tested. Specifically, the leakage measuring liquid is a solution to which a surfactant component such as soapy water or the like is added.
The camera 27 of the image acquisition device is arranged on the side of the safety valve to be detected, and performs rotary displacement along the safety valve to be detected, so as to acquire surface images of the safety valve to be detected at all angles; specifically, the image capture device utilizes a rail mechanism to provide rotational displacement capability to the camera 27.
The data acquisition circuit is used for respectively connecting the first temperature sensor 8, the first pressure sensor 9, the second temperature sensor 17, the second pressure sensor 18 and the third pressure sensor 30 with the numerical control center 32, and the acquired data of each sensor is sent to the numerical control center 32.
The device control circuit is used for respectively connecting the first stop valve 1, the booster pump 2, the second stop valve 3, the dust remover 4, the oil remover 5, the dehydrator 6, the cooler 10, the heater 11, the third stop valve 12, the first regulating valve 14, the second regulating valve 15, the third regulating valve 20, the fourth stop valve 25, the fifth stop valve 22, the environment adjusting bin 23 and the liquid pump 29 with the numerical control center 32, and the numerical control center 32 controls each controlled object.
The comprehensive test for the safety valve to be tested according to the comprehensive test bed provided by the invention comprises the following steps: the test system comprises an air tightness test, a discharge pressure test, a pressure maintaining test, a recoil pressure test, a pulse pressure-resistant test, a reliability test and a working environment test.
In this embodiment, the comprehensive test bench is used to perform the air-tightness test on the first to-be-tested safety valve 26 on the first safety valve test branch, and the specific method is as follows:
s11, the first to-be-tested safety valve 26 is installed on a first safety valve test branch of the comprehensive test bed, and factory parameters of the first to-be-tested safety valve 26 are recorded into the numerical control center 32 to serve as calibration parameters, and the method comprises the following steps: nominal pressure, working pressure, setting pressure, discharge pressure, recoil pressure, pressure grade, flow passage diameter and working environment temperature range. A standard calibrated amount of the leak measurement fluid is poured into the reservoir 28. In the initial state, all valves on the test bed are in a closed state, and all devices are in a non-running state.
Wherein, the nominal pressure refers to: the valve body of the safety valve can bear the maximum allowable pressure, such as PN16, PN25, PN40 and PN64. The working pressure is as follows: the normal pressure that the relief valve body itself can bear. The setting pressure is as follows: the preset pressure when the valve clack of the safety valve starts to open under the operation condition is the gauge pressure measured at the valve inlet, namely the pressure of the opening action of the safety valve, when the preset pressure reaches or exceeds the pressure value, the safety valve can open, and the preset pressure is a value set artificially, generally 1.05-1.1 times of the highest working pressure, and is a safety value which is larger than the normal working pressure of equipment and smaller than the design pressure of the equipment. The discharge pressure is: the setting pressure plus the excess pressure (the excess pressure refers to the pressure increment exceeding the setting pressure of the safety valve and is generally expressed by the percentage of the setting pressure), namely the inlet pressure when the valve clack reaches the specified opening height, and the upper limit of the discharge pressure is required to comply with the requirements of national relevant standards or regulations. Recoil pressure means: after the safety valve is discharged, the valve clack compresses the valve seat again, the inlet pressure when the medium stops discharging is the reseating pressure, and the reseating pressure is an important parameter for representing the use quality of the safety valve. The diameter of the flow channel is as follows: the diameter of the smallest cross-sectional area of the flow path between the inlet end of the flapper and the sealing surface of the closure member.
S12, connecting the input end of the supercharging device with an air source, inputting air into the supercharging device, and if the air source is a high-pressure air source, opening the second stop valve 3 by the numerical control center 32, wherein the first stop valve 1 and the supercharging pump 2 are in a closed state; if the air source is a normal-pressure air source, the numerical control center 32 opens the first stop valve 1 and the booster pump 2, and the second stop valve 3 is in a closed state at the moment; meanwhile, the numerical control center 32 opens the dust remover 4, the oil remover 5 and the dehydrator 6, the high-pressure gas flowing out of the supercharging device enters the first pressure container 7 after being purified by the gas purification device, the high-pressure gas is input into the first pressure container 7, and the third stop valve 12 is in a closed state at the moment; in the process of inflating the first pressure container 7, the numerical control center 32 adjusts and controls the second stop valve 3, the first stop valve 1 and the booster pump 2 according to the data acquired by the first pressure container 9 until the gas pressure in the first pressure container 7 reaches the working pressure, then the gas input into the booster device is stopped, and the high-pressure gas stored in the first pressure container 7 is directly used as a test gas source in the subsequent test.
And S13, the numerical control center 32 opens the third stop valve 12, the first regulating valve 14 and the second regulating valve 15, and in the embodiment, the numerical control center 32 also opens the fourth stop valve 25 and the fifth stop valve 22 is in a closed state because the first to-be-tested safety valve 26 is subjected to the air tightness test. Inputting the high-pressure gas stored in the first pressure container 7 into the second pressure container 16 and the first safety valve test branch, receiving the data collected by the second pressure container 18, and gradually adjusting the opening degrees of the first regulating valve 14 and the second regulating valve 15 according to the gas pressure in the second pressure container 16 until the gas pressure in the second pressure container 16 reaches 90% of the factory set pressure, so as to test the air tightness of the first safety valve 26 to be tested under the condition that the gas pressure is 90% of the factory set pressure. The nc center 32 closes the third stop valve 12, the first regulating valve 14, the second regulating valve 15.
S14, the numerical control center 32 turns on the liquid pump 29 and adjusts the pumping speed of the liquid pump 29 until the hydraulic pressure value measured by the third pressure sensor 30 reaches a calibrated value, at this time, the leakage measurement liquid stored in the liquid storage tank 28 sprays the first safety valve 26 to be measured through the spray header 31, and after the surface of the first safety valve 26 to be measured is soaked with the leakage measurement liquid, the liquid pump 29 is turned off.
S15, the numerical control center 32 controls the camera 27 of the image acquisition device to shoot, rotationally displaces along the first to-be-detected safety valve 26, acquires surface images of all angles of the first to-be-detected safety valve 26 at the current moment, namely the moment T1, and sends the surface images to the numerical control center 32; the numerical control center 32 identifies the surface images of the angles, identifies the bubbles in the surface images of the angles, and counts the number of the bubbles in the surface images of the angles at the time T1, and the circle center position and the circumference of each bubble.
And S16, after the time interval delta T, acquiring surface images of the first safety valve to be detected 26 at the current moment, namely at the moment T2, and counting the number of bubbles in the surface images of the angles at the moment T2, and the circle center position and the circumference of each bubble. Where T2= T1+ Δ T.
S17, the numerical control center 32 performs comparative analysis on the surface images of the same angle at the front and rear two moments, namely the moment T1 and the moment T2, according to the surface images of the first safety valve to be measured 26 at the front and rear two moments:
if the number of the bubbles in the surface image at the time T2 is increased compared with the number of the bubbles in the surface image at the time T1, and the increased number of the bubbles exceeds a set threshold, it indicates that the first to-be-tested safety valve 26 leaks gas at 90% of the factory setting pressure; if the circumference of a certain bubble in the surface image at the time T2 is larger than the circumference of a bubble at the corresponding position in the surface image at the time T1, and the increased value of the circumference exceeds the set threshold, it indicates that the first to-be-tested safety valve 26 leaks at 90% of the factory setting pressure; otherwise, it indicates that the first safety valve 26 to be tested does not leak at 90% of the factory set pressure.
And S18, the numerical control center 32 controls the gas path adjusting device to pressurize the second pressure container 16, so that the gas pressure in the second pressure container 16 is increased by 2% each time until the gas pressure is pressurized to the factory setting pressure, and the airtightness of the first to-be-tested safety valve 26 is respectively tested at the factory setting pressures of 92%, 94%, 96%, 98% and 100% according to the modes of the steps S14 to S17.
And S19, controlling a temperature adjusting device by the numerical control center 32, adjusting the gas temperature in the second pressure container 16, and testing the airtightness of the first to-be-tested safety valve 26 at different gas temperatures respectively according to the methods of the steps S14 to S18.
And if the airtightness test of the first to-be-tested safety valve 26 is qualified, performing the next test, otherwise, terminating the test and reporting the reason for terminating the test.
In this embodiment, the integrated test bed is used to sequentially perform the discharge pressure test, the pressure maintaining test, the recoil pressure test, the pulse withstand voltage test and the reliability test on the first to-be-tested safety valve 26 on the first safety valve test branch, and the specific method is as follows:
s21, the first to-be-tested safety valve 26 is installed on a first safety valve test branch of the comprehensive test bed, and factory parameters of the first to-be-tested safety valve 26 are recorded into the numerical control center 32 to serve as calibration parameters, and the method comprises the following steps: nominal pressure, working pressure, setting pressure, discharge pressure, recoil pressure, pressure grade, flow passage diameter and working environment temperature range. In the initial state, all valves on the test bed are in a closed state, and all devices are in a non-running state.
S22, connecting the input end of the supercharging device with a gas source, inputting gas into the supercharging device, simultaneously, opening the gas purification device by the numerical control center 32, purifying the high-pressure gas flowing out of the supercharging device, then entering the first pressure container 7, inputting the high-pressure gas into the first pressure container 7, stopping inputting the gas into the supercharging device until the gas pressure in the first pressure container 7 reaches the working pressure, and directly adopting the high-pressure gas stored in the first pressure container 7 as a test gas source in a subsequent test.
And S23, the numerical control center 32 opens the gas path adjusting device and the fourth stop valve 25, the fifth stop valve 22 is in a closed state, and the high-pressure gas stored in the first pressure container 7 is input into the second pressure container 16 and the first safety valve test branch.
S24, carrying out a discharge pressure test on the first safety valve 26 to be tested:
and S241, the numerical control center 32 controls the gas path adjusting device to pressurize the second pressure container 16, so that the gas pressure in the second pressure container 16 reaches the factory setting pressure of 90%, and then the gas path adjusting device is closed.
S242, the numerical control center 32 controls the gas path adjusting device to continuously pressurize the second pressure container 16, at this time, the pressurizing speed is less than the pressurizing speed of step S241, and the pressurizing can be performed by increasing the gas pressure in the second pressure container 16 by 1% at intervals, in this process, the numerical control center 32 judges the pressure drop in the second pressure container 16 in real time according to the data collected by the second pressure sensor 18 on the second pressure container 16, if the pressure drop rate exceeds a set threshold, that is, the first pressure drops sharply, the gas pressure in the second pressure container 16 at this time when the first pressure drop rate exceeds the set threshold is recorded, and the gas pressure is used as the actual setting pressure of the first safety valve 26 to be measured; otherwise, continuously pressurizing until the first pressure drop rate exceeds the set threshold value, and obtaining the actual setting pressure of the first to-be-detected safety valve 26.
S243, after the first pressure drop rate exceeds the set threshold, the numerical control center 32 controls the gas path adjusting device to continue to pressurize the second pressure container 16, and at this time, the pressurizing speed is less than the pressurizing speed of step S241, and the gas pressure in the second pressure container 16 can be increased by 1% at intervals, in this process, the numerical control center 32 judges the pressure drop in the second pressure container 16 in real time according to the data collected by the second pressure sensor 18, and if the pressure drop rate exceeds the set threshold, that is, the second pressure drops sharply, the gas pressure in the second pressure container 16 at this time when the second pressure drop rate exceeds the set threshold is recorded, and is used as the actual discharge pressure of the first to-be-measured safety valve 26; otherwise, the pressurization is continued until the second pressure drop rate exceeds the set threshold value, and the actual discharge pressure of the first to-be-detected safety valve 26 is obtained.
And if the discharge pressure test of the first to-be-tested safety valve 26 is qualified, namely the actual discharge pressure and the actual setting pressure of the first to-be-tested safety valve 26 both meet the calibration parameter range, carrying out the next test, otherwise, terminating the test and reporting the test termination reason.
S25, performing a pressure maintaining test on the first to-be-tested safety valve 26:
and S251, the numerical control center 32 controls the gas circuit adjusting device to close the gas circuit adjusting device after the gas pressure in the second pressure container 16 reaches 90% of the actual set pressure, so as to test the pressure retaining performance of the first to-be-tested safety valve 26 under 90% of the actual set pressure.
S252, the numerical control center 32 determines the pressure drop in the second pressure vessel 16 in real time according to the data collected by the second pressure sensor 18 on the second pressure vessel 16, and if the pressure drop rate exceeds a set threshold, or the pressure drop exceeds a set value within a predetermined time, it indicates that the first to-be-tested safety valve 26 does not maintain pressure at 90% factory setting pressure; otherwise, it means that the first relief valve to be measured 26 is held at 90% of the actual set pressure. In the invention, if the condition of no pressure maintaining occurs, the reason of no pressure maintaining can be found by combining the air tightness test.
And S253, after a period of time, the numerical control center 32 controls the gas path adjusting device to pressurize the second pressure container 16 once, so that the gas pressure in the second pressure container 16 is increased by 2% each time until the gas pressure is pressurized to the factory setting pressure, and the pressure holding performance of the first to-be-tested safety valve 26 under the actual setting pressures of 92%, 94%, 96%, 98% and 100% is respectively tested according to the mode of the step S252.
And if the pressure maintaining test of the first to-be-tested safety valve 26 is qualified, namely the pressure maintaining performance meets the calibration parameter range, carrying out the next test, otherwise, terminating the test and reporting the reason for terminating the test.
S26, carrying out a reseating pressure test on the first safety valve 26 to be tested:
s261, the numerical control center 32 controls the gas path adjusting device, so that the gas path adjusting device is closed after the gas pressure in the second pressure container 16 reaches the set pressure; wherein the set pressure is the actual discharge pressure of the first to-be-measured relief valve 26.
And S262, the numerical control center 32 opens the discharging device, discharges the gas in the second pressure container 16 by using the discharging device, namely reduces the pressure, and can discharge 1% of the gas pressure in the second pressure container 16 at intervals, the numerical control center 32 judges the pressure drop in the second pressure container 16 in real time according to the data collected by the second pressure sensor 18 until the gas pressure in the second pressure container 16 is kept unchanged for the first time, namely the pressure drop is 0, records the gas pressure in the second pressure container 16 when the pressure drop is 0, and takes the gas pressure as the actual recoil pressure of the first safety valve 26 to be measured.
And if the recoil pressure test of the first to-be-tested safety valve 26 is qualified, namely the actual recoil pressure of the first to-be-tested safety valve 26 meets the range of the calibration parameters, carrying out the next test, otherwise, terminating the test and reporting the reason for terminating the test.
S27, performing a pulse withstand voltage test on the first to-be-tested safety valve 26:
s271, the numerical control center 32 controls the gas path adjusting device to close the gas path adjusting device after the gas pressure in the second pressure container 16 reaches the set pressure; the set pressure is the actual set pressure of the first to-be-measured relief valve 26.
S272, the numerical control center 32 opens the discharge device, and discharges the gas in the second pressure vessel 16 by using the discharge device until the gas pressure in the second pressure vessel 16 is discharged to zero.
And S273, the steps S271 to S272 are repeated, and after a plurality of times of circulation, whether the first to-be-tested safety valve 26 is damaged is judged, wherein the judgment method is as follows:
according to the manner of the steps S24 and S26, the discharge pressure test and the recoil pressure test are carried out on the first safety valve to be tested 26 again to obtain the set pressure, the discharge pressure and the recoil pressure of the first safety valve to be tested 26 after the pulse pressure-resistant test at the moment, whether the set pressure, the discharge pressure and the recoil pressure at the moment are in the range of the calibration parameters is judged, and if the set pressure, the discharge pressure and the recoil pressure are in the range of the calibration parameters, the first safety valve to be tested 26 has the pulse pressure resistance; otherwise, it means that the first to-be-tested safety valve 26 does not have pulse pressure resistance.
And if the pulse withstand voltage test of the first to-be-tested safety valve 26 is qualified, carrying out the next test, otherwise, terminating the test and reporting the reason for terminating the test.
S28, carrying out a reliability test on the first safety valve 26 to be tested:
s281, the numerical control center 32 controls the temperature adjustment device to adjust the temperature of the gas in the second pressure vessel 16.
And S282, sequentially carrying out a discharge pressure test, a pressure maintaining test, a recoil pressure test and a pulse pressure resisting test on the first safety valve to be tested 26 at different gas temperatures according to the modes of the steps S24 to S27, and testing the setting pressure, the discharge pressure, the pressure maintaining property, the recoil pressure and the pulse pressure resisting property of the safety valve to be tested at different gas temperatures.
And if the reliability test of the first to-be-tested safety valve 26 is qualified, carrying out the next test, otherwise, terminating the test and reporting the reason for terminating the test.
In this embodiment, the comprehensive test bench is used to perform the work environment test on the second safety valve 24 to be tested on the test branch of the second safety valve, and the specific mode is as follows:
s31, the safety valve 24 to be tested is installed on a second safety valve test branch of the comprehensive test bed, and factory parameters of the safety valve 24 to be tested are recorded into the numerical control center 32 to serve as calibration parameters, wherein the method comprises the following steps: nominal pressure, working pressure, setting pressure, discharge pressure, recoil pressure, pressure grade, flow passage diameter and working environment temperature range. In the initial state, all valves on the test bed are in a closed state, and all devices are in a non-running state.
And S32, connecting the input end of the supercharging device with a gas source, inputting gas into the supercharging device, simultaneously, opening a gas purification device by the numerical control center 32, purifying the high-pressure gas flowing out of the supercharging device, then entering the first pressure container 7, inputting the high-pressure gas into the first pressure container 7, stopping inputting the gas into the supercharging device until the gas pressure in the first pressure container 7 reaches the working pressure, and directly adopting the high-pressure gas stored in the first pressure container 7 as a test gas source in a subsequent test.
And S33, the numerical control center 32 opens the gas path adjusting device, opens the fifth stop valve 22, closes the fourth stop valve 25, and inputs the high-pressure gas stored in the first pressure container 7 into the second pressure container 16 and the second safety valve test branch.
S34, the numerical control center 32 controls the environment adjusting bin 23, adjusts the working environment temperature of the second safety valve 24 to be tested, divides the temperature interval from minus 40 ℃ to plus 65 ℃ into 21 temperature intervals according to 5 ℃, and obtains 21 working environment temperatures.
And S35, respectively carrying out various tests on the second safety valve to be tested 24 at various working environment temperatures in the manner of the steps S24-S28, wherein the tests comprise a discharge pressure test, a pressure maintaining test, a recoil pressure test, a pulse pressure-resistant test and a reliability test, and testing the working performance of the second safety valve to be tested 24 at different working environment temperatures.
In the invention, the numerical control center 32 also generates a test report of the safety valve to be tested according to the test results. Meanwhile, the operator can flexibly adjust test parameters, test items, test sequences and the like according to the type of the safety valve to be tested and the requirements of the use environment. For example, the first to-be-tested safety valve 26 on the first safety valve test branch may be subjected to a discharge pressure test to obtain an actual set pressure, and then the first to-be-tested safety valve 26 may be subjected to an air-tightness test, in which the actual set pressure is used as a standard in the air-tightness test to test the air-tightness of the first to-be-tested safety valve 26 at the actual set pressures of 92%, 94%, 96%, 98%, and 100%, and then the first to-be-tested safety valve 26 may be subjected to a pressure holding test, a recoil pressure test, a pulse pressure resistance test, and a reliability test. An operator can also install a safety valve to be tested on a first safety valve test branch, firstly perform air tightness test, pressure maintaining test, recoil pressure test, pulse pressure resistance test and reliability test on the safety valve to be tested, then install the safety valve to be tested on a second safety valve test branch after all tests are qualified, and then perform working environment test on the safety valve to be tested, namely perform discharge pressure test, pressure maintaining test, recoil pressure test, pulse pressure resistance test and reliability test on the safety valve to be tested at all working environment temperatures.
The invention is not to be considered as limited to the specific embodiments shown and described, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A combination test stand for a safety valve, the combination test stand comprising: the device comprises a supercharging device, a first pressure container (7), a temperature adjusting device, an air path adjusting device, a second pressure container (16), a safety valve test branch and a safety valve to be tested, which are sequentially connected along the gas transmission direction;
the supercharging device is used for supercharging gas and inputting the supercharged gas into the first pressure container (7); the temperature regulating device is used for regulating the temperature of the gas flowing into the second pressure container (16); the gas path adjusting device is used for adjusting the gas flow rate flowing into the second pressure container (16); the second pressure container (16) is used for storing gas with set pressure and set temperature and is used for testing the safety valve to be tested; the safety valve to be tested is connected with a second pressure container (16) through a safety valve test branch;
the second pressure vessel (16) is also connected with a discharge device, and the discharge device is used for discharging the gas in the second pressure vessel (16);
the first pressure container (7) and the second pressure container (16) are both provided with a temperature sensor and a pressure sensor which are used for collecting the gas temperature and the gas pressure in the pressure containers;
the comprehensive test bed further comprises an environment adjusting bin (23), the safety valve to be tested is placed in the environment adjusting bin (23), and the environment adjusting bin (23) is used for providing different working environment temperatures for the safety valve to be tested;
the comprehensive test bed also comprises a spraying device and an image acquisition device, wherein the spraying device is used for spraying leakage measurement liquid to the safety valve to be tested, and the image acquisition device is used for acquiring a surface image of the safety valve to be tested;
the comprehensive test bed also comprises a numerical control center (32), wherein the numerical control center (32) is connected with each sensor and is used for receiving the acquired data of each sensor; the numerical control center (32) is also connected with each device and used for controlling each device.
2. The comprehensive test bed for the safety valve according to claim 1, wherein the pressure boosting device comprises a high-pressure gas path and a normal-pressure gas path which are connected in parallel, a first stop valve (1) and a booster pump (2) are arranged on the high-pressure gas path, and a second stop valve (3) is arranged on the normal-pressure gas path; the exhaust device comprises a second one-way valve (19), a third regulating valve (20) and a silencer (21) which are sequentially connected along the gas transmission direction.
3. A bench complex for safety valves according to claim 1, characterised in that the temperature regulating means comprise a cooler (10) and a heater (11).
4. The integrated test bench for safety valves according to claim 1, characterized in that the gas path regulating device comprises a third stop valve (12), a first one-way valve (13), a regulating valve assembly connected in sequence along the gas transmission direction; the regulating valve assembly comprises a first regulating valve (14) and a second regulating valve (15) which are connected in parallel; the first adjusting valve (14) and the second adjusting valve (15) are used for adjusting air quantity, and the adjusting precision of the first adjusting valve (14) is smaller than that of the second adjusting valve (15).
5. The integrated test bench for safety valves according to claim 1, wherein the spray device comprises a liquid storage tank (28), a liquid pump (29), a third pressure sensor (30) and a spray header (31) which are connected in sequence along the liquid flow direction; the liquid storage tank (28) is used for storing leakage measuring liquid, the liquid pump (29) is used for adjusting hydraulic pressure, the third pressure sensor (30) is used for measuring hydraulic pressure, and the spray header (31) is located above the safety valve to be measured and used for spraying the safety valve to be measured.
6. The integrated test bench for safety valves according to claim 1, wherein the camera (27) of the image acquisition device is arranged at the side of the safety valve to be tested and performs rotational displacement along the surface of the safety valve to be tested, so as to acquire surface images of the safety valve to be tested at various angles.
7. A bench complex for safety valves according to claim 1, characterized in that the bench complex further comprises a gas purification device for purifying the gas fed into the first pressure vessel (7); the purification treatment comprises dust removal, oil removal and water removal; the gas purification device comprises a dust remover (4), an oil remover (5) and a dehydrator (6) which are sequentially connected along the gas transmission direction.
8. The comprehensive test method of the comprehensive test bed for the safety valve, which is suitable for the safety valve of claim 1, is characterized in that the comprehensive test bed is used for carrying out an air tightness test on the safety valve to be tested, and the specific method is as follows:
s11, mounting the safety valve to be tested on a safety valve test branch of the comprehensive test bed, and recording factory parameters of the safety valve to be tested into a numerical control center (32) as calibration parameters;
s12, connecting the input end of the supercharging device with an air source, inputting air into the supercharging device, and controlling the supercharging device by the numerical control center (32) to input high-pressure air into the first pressure container (7);
s13, the gas path adjusting device is opened by the numerical control center (32), high-pressure gas stored in the first pressure container (7) is input into the second pressure container (16) and the safety valve test branch, and the gas path adjusting device is closed after the gas pressure in the second pressure container (16) is adjusted to reach a set pressure by controlling the gas path adjusting device; wherein the set pressure is A% of the factory set pressure of the safety valve to be tested;
s14, the numerical control center (32) opens the spraying device, sprays the leakage measuring liquid to the safety valve to be measured, and closes the spraying device after the surface of the safety valve to be measured is soaked with the leakage measuring liquid;
s15, the numerical control center (32) opens the image acquisition device, acquires the surface image of the safety valve to be detected at the current moment, namely the moment T1, and sends the surface image of the safety valve to be detected at the moment T1 to the numerical control center (32);
s16, after the time interval delta T, collecting the surface image of the safety valve to be detected at the current moment, namely the moment T2, and sending the surface image of the safety valve to be detected at the moment T2 to a numerical control center (32); t2= T1+ Δ T;
s17, the numerical control center (32) compares and analyzes the surface images of the safety valve to be tested at the front moment and the rear moment according to the surface images of the safety valve to be tested at the front moment and the rear moment, namely the moment T1 and the moment T2:
counting the number of bubbles in the surface images at the two moments before and after, and the positions and the circumferences of all the bubbles, wherein if the number of the bubbles in the surface image at the moment T2 is greater than the number of the bubbles in the surface image at the moment T1, or the circumference of a certain bubble in the surface image at the moment T2 is greater than the circumference of the bubble at the corresponding position in the surface image at the moment T1, the safety valve to be tested leaks air under the factory setting pressure of A%; otherwise, indicating that the safety valve to be tested does not leak gas under A% of factory setting pressure;
s18, the numerical control center (32) controls the gas circuit adjusting device to pressurize the second pressure container (16), so that the gas pressure in the second pressure container (16) is increased by delta a% each time until the gas pressure is increased to the factory setting pressure, and the gas tightness of the safety valve to be tested under the factory setting pressure of (A + delta a)%, (A +2 delta a)% of the factory setting pressure, and (A +3 delta a)% of the factory setting pressure is tested respectively according to the steps S14-S17;
and S19, controlling a temperature adjusting device by the numerical control center (32), adjusting the gas temperature in the second pressure container (16), and testing the air tightness of the safety valve to be tested at different gas temperatures respectively according to the mode of the steps S14-S18.
9. The comprehensive test method of the comprehensive test bed for the safety valve, which is suitable for the safety valve according to claim 1, is characterized in that the comprehensive test bed is used for carrying out a discharge pressure test, a pressure holding test, a recoil pressure test, a pulse pressure test and a reliability test on the safety valve to be tested in sequence, and the specific method is as follows:
s21, mounting the safety valve to be tested on a safety valve test branch of the comprehensive test bed, and recording factory parameters of the safety valve to be tested into a numerical control center (32) as calibration parameters;
s22, connecting the input end of the pressurizing device with an air source, inputting air into the pressurizing device, and controlling the pressurizing device to input high-pressure air into the first pressure container (7) by the numerical control center (32);
s23, the numerical control center (32) opens the gas path adjusting device, and high-pressure gas stored in the first pressure container (7) is input into the second pressure container (16) and the safety valve test branch;
s24, carrying out a discharge pressure test on the safety valve to be tested:
s241, the numerical control center (32) controls the gas path adjusting device to pressurize the second pressure container (16) so that the gas pressure in the second pressure container (16) reaches a set pressure, and then the gas path adjusting device is closed; wherein the set pressure is A% of the factory set pressure of the safety valve to be tested;
s242, the numerical control center (32) controls the gas path adjusting device to continuously pressurize the second pressure container (16), the pressurizing speed is lower than the pressurizing speed of the step S241, the numerical control center (32) judges the pressure drop in the second pressure container (16) in real time according to the data collected by the pressure sensor on the second pressure container (16), if the pressure drop rate exceeds a set threshold value, the gas pressure in the second pressure container (16) when the first pressure drop rate exceeds the set threshold value is recorded, and the gas pressure in the second pressure container (16) at the moment is used as the actual setting pressure of the safety valve to be tested; otherwise, continuously pressurizing until the first pressure drop rate exceeds a set threshold value, and obtaining the actual set pressure of the safety valve to be tested;
s243, after the first pressure drop rate exceeds the set threshold, the numerical control center (32) controls the gas path adjusting device to continuously pressurize the second pressure container (16), the pressurizing speed is lower than the pressurizing speed of the step S241 at the moment, the numerical control center (32) judges the pressure drop in the second pressure container (16) in real time according to the data collected by the pressure sensor on the second pressure container (16), if the pressure drop rate exceeds the set threshold, the gas pressure in the second pressure container (16) when the second pressure drop rate exceeds the set threshold at the moment is recorded, and the gas pressure in the second pressure container (16) at the moment is used as the actual discharge pressure of the safety valve to be tested; if not, continuously pressurizing until the second pressure drop rate exceeds a set threshold value, and obtaining the actual discharge pressure of the safety valve to be tested;
if the discharge pressure test of the safety valve to be tested is qualified, namely the actual discharge pressure and the actual setting pressure of the safety valve to be tested both meet the error range of the calibration parameters, carrying out the next test, otherwise, terminating the test and reporting the reason for terminating the test;
s25, carrying out a pressure maintaining test on the safety valve to be tested:
s251, the numerical control center (32) controls the gas path adjusting device to close the gas path adjusting device after the gas pressure in the second pressure container (16) reaches the set pressure; wherein the set pressure is A% of the actual set pressure of the safety valve to be tested;
s252, the numerical control center (32) judges the pressure drop in the second pressure container (16) in real time according to the data acquired by the pressure sensor on the second pressure container (16), and if the pressure drop rate exceeds a set threshold value or the pressure drop exceeds a set value within a set time, the safety valve to be tested does not maintain pressure under A% of actual set pressure; otherwise, the safety valve to be tested is subjected to pressure maintaining under the factory setting pressure of A%;
s253, the numerical control center (32) controls the gas circuit adjusting device to pressurize the second pressure container (16), so that the gas pressure in the second pressure container (16) is increased by delta a% each time until the gas pressure is increased to the actual set pressure, and the safety valve to be tested is respectively tested for the actual set pressure of (A + delta a)% and the actual set pressure of (A +2 delta a)% and the pressure maintaining performance under the actual set pressure according to the mode of the step S252;
if the pressure maintaining test of the safety valve to be tested is qualified, namely the safety valve to be tested has pressure maintaining performance, carrying out the next test, otherwise, terminating the test and reporting the reason for terminating the test;
s26, carrying out a recoil pressure test on the safety valve to be tested:
s261, the gas path adjusting device is controlled by the numerical control center (32), so that the gas pressure in the second pressure container (16) reaches the set pressure, and then the gas path adjusting device is closed; the set pressure is the actual discharge pressure of the safety valve to be tested;
s262, the numerical control center (32) opens the discharging device, the gas in the second pressure container (16) is discharged, namely, the pressure is reduced, the numerical control center (32) judges the pressure drop in the second pressure container (16) in real time according to the data collected by the pressure sensor on the second pressure container (16) until the gas pressure in the second pressure container (16) is kept unchanged, namely, the pressure drop is 0, and the gas pressure in the second pressure container (16) when the pressure drop is 0 at the moment is recorded and is used as the actual recoil pressure of the safety valve to be tested;
if the recoil pressure test of the safety valve to be tested is qualified, namely the actual recoil pressure of the safety valve to be tested meets the error range of the calibration parameters, carrying out the next test, otherwise, terminating the test and reporting the test termination reason;
s27, carrying out a pulse pressure-resistant test on the safety valve to be tested:
s271, the numerical control center (32) controls the gas path adjusting device to close the gas path adjusting device after the gas pressure in the second pressure container (16) reaches the set pressure; the set pressure is the actual set pressure of the safety valve to be tested;
s272, the numerical control center (32) opens a discharge device, and discharges the gas in the second pressure container (16) by using the discharge device until the gas pressure in the second pressure container (16) is discharged to zero;
and S273, the steps S271 to S272 are repeated, and after a plurality of times of circulation, whether the safety valve to be detected is damaged is judged, wherein the judgment mode is as follows:
according to the mode of the steps S24 and S26, carrying out a discharge pressure test and a recoil pressure test on the safety valve to be tested again to obtain the setting pressure, the discharge pressure and the recoil pressure of the safety valve to be tested after the pulse pressure-resistant test, judging whether the setting pressure, the discharge pressure and the recoil pressure are in the error range of the calibration parameters or not, and if the setting pressure, the discharge pressure and the recoil pressure are in the error range of the calibration parameters, indicating that the safety valve to be tested has pulse pressure resistance; otherwise, the safety valve to be tested does not have pulse pressure resistance;
if the pulse pressure resistance test of the safety valve to be tested is qualified, namely the safety valve to be tested has pulse pressure resistance, carrying out the next test, otherwise, terminating the test and reporting the reason for terminating the test;
s28, carrying out reliability test on the safety valve to be tested:
s281, the numerical control center (32) controls the temperature adjusting device to adjust the gas temperature in the second pressure container (16);
s282, carrying out a discharge pressure test, a pressure maintaining test, a recoil pressure test and a pulse pressure resistance test on the safety valve to be tested in sequence at different gas temperatures according to the mode of the steps S24-S27, and testing the setting pressure, the discharge pressure, the pressure maintaining property, the recoil pressure and the pulse pressure resistance of the safety valve to be tested at different gas temperatures;
if the safety valve to be tested is qualified in all tests at different gas temperatures, the test is finished, and if the safety valve to be tested is unqualified in a certain test at a certain gas temperature, the test is terminated and the reason for terminating the test is reported.
10. The comprehensive test method of the comprehensive test bed for the safety valve, which is suitable for the safety valve of claim 1, is characterized in that the comprehensive test bed is used for carrying out work environment tests on the safety valve to be tested, and the specific method is as follows:
s31, mounting the safety valve to be tested on a safety valve test branch of the comprehensive test bed, and recording factory parameters of the safety valve to be tested into a numerical control center (32) as calibration parameters;
s32, connecting the input end of the supercharging device with an air source, inputting air into the supercharging device, and controlling the supercharging device by the numerical control center (32) to input high-pressure air into the first pressure container (7);
s33, the gas path adjusting device is opened by the numerical control center (32), and the high-pressure gas stored in the first pressure container (7) is input into the second pressure container (16) and the safety valve test branch;
s34, the numerical control center (32) controls the environment adjusting bin (23) to adjust the working environment temperature of the safety valve to be measured;
and S35, performing various tests on the safety valve to be tested at various working environment temperatures respectively, and testing the working performance of the safety valve to be tested at different working environment temperatures.
CN202310243706.XA 2023-03-15 2023-03-15 Comprehensive test bed and comprehensive test method for safety valve Active CN115931342B (en)

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CN103852245A (en) * 2012-12-04 2014-06-11 华东理工大学 Test device and test method for testing heat-state mechanical performance of safety valve
CN205719497U (en) * 2016-04-05 2016-11-23 杭州市特种设备检测研究院 A kind of relief valve performance test and on-line testing instrument calibration equipment
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CN207717355U (en) * 2018-01-25 2018-08-10 鞍山市特种设备监督检验所 A kind of safety valve ultralow temperature checking table
KR102166660B1 (en) * 2020-02-03 2020-10-16 (주) 하늘기업 Device for valve operation precision test
US20200386654A1 (en) * 2018-09-11 2020-12-10 Dalian University Of Technology Test device and test method for dynamic characteristics of spring-loaded safety valve
CN214426930U (en) * 2021-04-10 2021-10-19 重庆市荣昌区川龙阀门有限公司 Leakproofness detection device is used in valve production
CN218211835U (en) * 2022-08-13 2023-01-03 邓州市宏鑫精密铸造有限责任公司 Valve sealing performance detection device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05296883A (en) * 1992-04-17 1993-11-12 Nissei Eng Kk Testing equipment of operation of safety valve
US20100281954A1 (en) * 2008-11-24 2010-11-11 Korea Hydro & Nuclear Power Co., Ltd. Test apparatus and method for safety valve
KR101224192B1 (en) * 2012-04-06 2013-01-21 유종훈 High temperature high pressure valve test device
CN103852245A (en) * 2012-12-04 2014-06-11 华东理工大学 Test device and test method for testing heat-state mechanical performance of safety valve
CN103292986A (en) * 2013-05-17 2013-09-11 深圳市特种设备安全检验研究院 Hot-state type test method and hot-state type test system for spring loaded safety valves
WO2016203273A1 (en) * 2015-06-19 2016-12-22 Seetru Limited Safety valve leak analysis system
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US20200386654A1 (en) * 2018-09-11 2020-12-10 Dalian University Of Technology Test device and test method for dynamic characteristics of spring-loaded safety valve
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CN214426930U (en) * 2021-04-10 2021-10-19 重庆市荣昌区川龙阀门有限公司 Leakproofness detection device is used in valve production
CN218211835U (en) * 2022-08-13 2023-01-03 邓州市宏鑫精密铸造有限责任公司 Valve sealing performance detection device

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