CN114593879A - Valve test equipment - Google Patents

Valve test equipment Download PDF

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Publication number
CN114593879A
CN114593879A CN202210104993.1A CN202210104993A CN114593879A CN 114593879 A CN114593879 A CN 114593879A CN 202210104993 A CN202210104993 A CN 202210104993A CN 114593879 A CN114593879 A CN 114593879A
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CN
China
Prior art keywords
valve
pipeline
negative pressure
positive pressure
test
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Pending
Application number
CN202210104993.1A
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Chinese (zh)
Inventor
付静
郦强
洪润江
申立影
张坤
赵文博
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Suzhou Endufa Automobile System Co ltd
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Suzhou Endufa Automobile System Co ltd
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Application filed by Suzhou Endufa Automobile System Co ltd filed Critical Suzhou Endufa Automobile System Co ltd
Priority to CN202210104993.1A priority Critical patent/CN114593879A/en
Publication of CN114593879A publication Critical patent/CN114593879A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/003—Machine valves

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The invention provides a valve testing device, which comprises a valve testing device, wherein the valve testing device comprises: malleation test component, negative pressure test component, test pipeline, first flowmeter and first pressure sensor, the test pipeline has relative first end and second end, the first end of test pipeline communicates the second end of first malleation pipeline and the second end of first negative pressure pipeline respectively, the second end of test pipeline is used for communicating the test end of valve that awaits measuring. According to the valve testing device, the valve testing device is simple in structure, high in integration level and high in testing efficiency, and various working conditions of a valve to be tested can be tested by the positive pressure testing assembly, the negative pressure testing assembly and the testing pipeline, so that the performance of the valve can be conveniently and quickly obtained.

Description

Valve test equipment
Technical Field
The invention relates to the technical field of valve testing, in particular to valve testing equipment.
Background
With the rapid development of the automobile industry, the types and applications of parts on automobiles are more and more. The development and detection of various valve devices become more and more important as the key components of the whole vehicle for realizing various control functions under different working conditions. The oil tank isolation valve is used as a key part of the new energy hybrid vehicle and plays a key role in controlling fuel evaporation emission and the like of the new energy hybrid vehicle. Therefore, development verification and performance detection of the oil tank isolation valve are of great importance. However, if the performance state of the fuel tank isolating valve is required to be known, various performance tests need to be carried out on the fuel tank isolating valve, and the performance of the valve under different working conditions is detected. From this, must use multiple test equipment, can't carry out swift comprehensive test to the valve performance for test operation is very inconvenient, and efficiency of software testing is low.
Accordingly, there is a need to ameliorate one or more of the problems with the above-mentioned related art solutions.
It is noted that this section is intended to provide a background or context to the embodiments of the disclosure that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
Disclosure of Invention
The invention aims to provide a valve testing device, which realizes the comprehensive test of the performance of a valve and is particularly suitable for the comprehensive test of an oil tank isolating valve.
The purpose of the invention is realized by adopting the following technical scheme:
the invention provides a valve testing device, which comprises a valve testing device, wherein the valve testing device comprises:
a positive pressure test assembly comprising: the first positive pressure pipeline is provided with a first end and a second end which are opposite, the first end of the first positive pressure pipeline is used for being connected with an air source, and the first positive pressure control valve is arranged on the first positive pressure pipeline and used for controlling the gas in the first positive pressure pipeline to pass through;
negative pressure test assembly includes: the vacuum control system comprises a first negative pressure pipeline, a first vacuum generator and a first negative pressure control valve, wherein the first negative pressure pipeline is provided with a first end and a second end which are opposite to each other, the first negative pressure control valve is arranged on the first negative pressure pipeline and is used for controlling the gas in the first negative pressure pipeline to pass through, and the first vacuum generator is communicated with a pipeline between the first end of the first negative pressure pipeline and the first negative pressure control valve and is used for enabling the first negative pressure pipeline to generate negative pressure;
the first end of the test pipeline is respectively communicated with the second end of the first positive pressure pipeline and the second end of the first negative pressure pipeline, and the second end of the test pipeline is used for being communicated with the test end of the valve to be tested;
the first flowmeter and the first pressure sensor are respectively arranged on the test pipeline.
In some optional embodiments, the positive pressure test assembly further comprises a second positive pressure control valve and/or a first positive pressure gas protection valve, the second positive pressure control valve is arranged on the first positive pressure pipeline and is positioned between the first end of the first positive pressure pipeline and the first positive pressure control valve so as to control the passing of the first positive pressure pipeline, the first positive pressure gas protection valve is arranged on the first positive pressure pipeline and is positioned between the first positive pressure control valve and the second positive pressure control valve, and the first positive pressure gas protection valve is used for limiting the passing gas flow so as to prevent the gas flow from impacting the first flowmeter; and/or the presence of a gas in the gas,
the negative pressure test assembly further comprises a second negative pressure control valve and/or a first negative pressure gas protection valve, the second negative pressure control valve is arranged on the first negative pressure pipeline and located between the first end of the first negative pressure pipeline and the first vacuum generator to control the passing of the first negative pressure pipeline, the first negative pressure gas protection valve is arranged on the first negative pressure pipeline and located between the first vacuum generator and the first negative pressure control valve, and the first negative pressure gas protection valve is used for limiting the passing gas flow to prevent the gas flow from impacting the first flowmeter.
In some optional embodiments, the positive pressure test assembly further comprises a second positive pressure control valve and a first positive pressure gas protection valve, and the negative pressure test assembly further comprises a second negative pressure control valve and a first negative pressure gas protection valve;
the valve testing equipment comprises a plurality of valve testing devices, and the first ends of the first positive pressure pipelines of the valve testing devices are connected with the same air source at the same time.
In some alternative embodiments, the valve test apparatus includes a plurality of valve test devices, each valve test device having a first flow meter with a different test range.
In some optional embodiments, the valve testing apparatus comprises three valve testing devices, wherein the three valve testing devices are a first valve testing device, a second valve testing device and a third valve testing device respectively, the testing range of the first flowmeter of the first valve testing device is-0.050L/min to +0.050L/min, and the testing precision is 0.0001L/min; the test range of the first flowmeter of the second valve test device is-0.5L/min- +0.5L/min, and the test precision is 0.001L/min; the test range of the first flowmeter of the third valve test device is-50L/min to +50L/min, and the test precision is 0.1L/min.
In some optional embodiments, the valve testing apparatus further comprises a differential pressure flow testing device, the differential pressure flow testing device comprising:
the pressure difference pipeline is provided with two third positive pressure control valves and a second positive pressure gas protection valve arranged between the two third positive pressure control valves, the third positive pressure control valves are used for controlling the passing of gas in the pressure difference pipeline, the second positive pressure gas protection valve is used for limiting the flow of the passing gas, the pressure difference pipeline is provided with a first end and a second end which are opposite, and the first end of the pressure difference pipeline is used for being connected with a gas source;
the pressure difference testing pipeline is provided with a first end and a second end which are opposite, the first end of the pressure difference testing pipeline is communicated with the second end of the pressure difference pipeline, and the second end of the pressure difference testing pipeline is used for supplying air to an air inlet of the valve to be tested;
the second flowmeter and the second pressure sensor are respectively arranged on the differential pressure testing pipeline;
and two ends of the differential pressure gauge are respectively communicated with the air outlet of the valve to be tested and the second end of the differential pressure testing pipeline.
In some optional embodiments, further comprising a housing, the valve testing device disposed within the housing;
the shell is provided with a first positive pressure controller, a first negative pressure controller, a first display, a second display and a first interface, the first positive pressure controller is connected with the first positive pressure control valve to control the opening and closing of the first positive pressure control valve, the first negative pressure controller is connected with the first negative pressure control valve to control the opening and closing of the first negative pressure control valve, the first display is used for displaying the measured value of the first pressure sensor, the second display is used for displaying the measured value of the first flowmeter, and the first interface is used for respectively communicating the second end of the test pipeline with the test end of the valve to be tested;
set up second positive pressure controller, third display, fourth display and second interface in addition on the shell, the opening and closing of third positive pressure control valve in order to control third positive pressure control valve are connected to the second positive pressure controller, the third display is used for showing second pressure sensor's measured value, the fourth display is used for showing the measured value of second flowmeter, the second interface is used for communicateing respectively the second end of differential pressure test pipeline with the air inlet of valve to be tested.
In some optional embodiments, the valve testing apparatus further comprises a simulation testing device, the simulation testing device comprising:
the second positive pressure pipeline is provided with two fourth positive pressure control valves and a third positive pressure gas protection valve arranged between the two fourth positive pressure control valves, the fourth positive pressure control valves are used for controlling the gas in the second positive pressure pipeline to pass through, the third positive pressure gas protection valve is used for limiting the flow of the gas passing through, the second positive pressure pipeline is provided with a first end and a second end which are opposite, and the first end of the second positive pressure pipeline is used for being connected with a gas source;
the second negative pressure pipeline is provided with two third negative pressure control valves, a second negative pressure gas protection valve and a second vacuum generator, the second negative pressure gas protection valve is arranged between the two third negative pressure control valves, the third negative pressure control valves are used for controlling the passing of gas in the second negative pressure pipeline, the second negative pressure gas protection valve is used for limiting the flow of the passing gas, the second negative pressure pipeline is provided with a first end and a second end which are opposite, the second vacuum generator is communicated with the pipeline between the first end of the second negative pressure pipeline and the third negative pressure control valves and is used for enabling the second negative pressure pipeline to generate negative pressure, and the second vacuum generator is closer to the first end of the second negative pressure pipeline than the second negative pressure gas protection valve;
the first simulation test pipeline is provided with a first end and a second end which are opposite, and the first end of the first simulation test pipeline is respectively communicated with the second end of the second positive pressure pipeline and the second end of the second negative pressure pipeline;
the gas tank is provided with a first vent hole and a second vent hole which are communicated with an inner cavity of the gas tank, and the first vent hole is communicated with the second end of the first simulation test pipeline;
a third pressure sensor provided on the gas tank to acquire a pressure within the gas tank;
the second simulation test pipeline is provided with a first end and a second end which are opposite, the first end of the second simulation test pipeline is communicated with the second vent of the gas tank, and the second end of the second simulation test pipeline is used for being communicated with the test end of the valve to be tested;
a fourth pressure sensor disposed on the second analog test line;
and the fifth control valve is arranged on the second simulation test pipeline so as to simulate the passing of gas in the test pipeline.
In some optional embodiments, further comprising a housing, the valve testing device disposed within the housing;
the shell is provided with a first positive pressure controller, a first negative pressure controller, a first display, a second display and a first interface, the first positive pressure controller is connected with the first positive pressure control valve to control the opening and closing of the first positive pressure control valve, the first negative pressure controller is connected with the first negative pressure control valve to control the opening and closing of the first negative pressure control valve, the first display is used for displaying the measured value of the first pressure sensor, the second display is used for displaying the measured value of the first flowmeter, and the first interface is used for respectively communicating the second end of the test pipeline with the test end of the valve to be tested;
the shell is provided with a fifth display, a sixth display and a third interface, the fifth display is used for displaying the measured value of a third pressure sensor when positive pressure exists in the air tank, the sixth display is used for displaying the measured value of the third pressure sensor when negative pressure exists in the air tank, and the third interface is used for respectively communicating the second end of the second simulation test pipeline with the test end of the valve to be tested.
In some optional embodiments, the valve testing apparatus further comprises a system controller, the system controller is connected to the third pressure sensor and the second vacuum generator, and the system controller controls the air supply to the first end of the second positive pressure pipeline and the vacuum pumping of the second vacuum generator according to a measurement value of the third pressure sensor.
Compared with the prior art, the invention has the beneficial effects that at least: through valve test equipment, a comprehensive test equipment is provided, various working conditions of the valve to be tested can be tested by utilizing the positive pressure test assembly, the negative pressure test assembly and the test pipeline, the performance of the valve can be conveniently and quickly known, and the test circuit is simple in structure, high in integration level and high in test efficiency.
Drawings
Fig. 1 is a schematic view of a pipe connection structure of a valve testing apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a valve testing apparatus according to an embodiment of the present invention.
In the figure: 10. a valve to be tested; 11. a first valve testing device; 12. a second valve test device; 13. a third valve test device; 100. a positive pressure test assembly; 101. a first positive pressure line; 102. a first positive pressure control valve; 103. a second positive pressure control valve; 104. a first positive pressure gas protection valve; 200. a negative pressure test assembly; 201. a first negative pressure line; 202. a first vacuum generator; 203. a first negative pressure control valve; 204. a second negative pressure control valve; 205. a first negative pressure gas protection valve; 300. testing the pipeline; 301. a first flow meter; 302. a first pressure sensor; 400. a differential pressure flow testing device; 401. a differential pressure line; 4011. a third positive pressure control valve; 4012. a second positive pressure gas protection valve; 402. a differential pressure test pipeline; 4021. a second flow meter; 4022. a second pressure sensor; 403. a differential pressure gauge; 500. a housing; 501. a first positive pressure controller; 502. a first negative pressure controller; 503. a first display; 504. a second display; 505. a first interface; 506. a second positive pressure controller; 507. a third display; 508. a fourth display; 509. a second interface; 5010. a fifth display; 5011. a sixth display; 5012. a third interface; 600. a simulation test device; 601. a second positive pressure line; 6011. a fourth positive pressure control valve; 6012. a third positive pressure gas protection valve; 602. a second negative pressure line; 6021. a third negative pressure control valve; 6022. a second negative pressure gas protection valve; 6023. a second vacuum generator; 603. a first simulation test pipeline; 604. a second analog test pipeline; 6041. a fourth pressure sensor; 6042. a fifth control valve; 700. a gas tank; 701. a first vent; 702. a second vent; 703. a third pressure sensor.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
The words expressing the position and direction described in the present invention are illustrated in the accompanying drawings, but may be changed as required and still be within the scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a valve testing apparatus, including a valve testing device, where the valve testing device includes: positive pressure test assembly 100, negative pressure test assembly 200, test line 300, first flow meter 301, and first pressure sensor 302.
The positive pressure test assembly 100 includes: the first positive pressure pipeline 101 and the first positive pressure control valve 102, the first positive pressure pipeline 101 has a first end and a second end opposite to each other, the first end of the first positive pressure pipeline 101 is used for connecting an air source, the first positive pressure control valve 102 is arranged on the first positive pressure pipeline 101 and is used for controlling the passage of air in the first positive pressure pipeline 101, and the first positive pressure control valve 102 may be a pneumatic control valve.
The negative pressure test assembly 200 includes: the vacuum source comprises a first negative pressure pipeline 201, a first vacuum generator 202 and a first negative pressure control valve 203, wherein the first negative pressure pipeline 201 is provided with a first end and a second end which are opposite to each other, the first negative pressure control valve 203 is arranged on the first negative pressure pipeline 201 and is used for controlling the air in the first negative pressure pipeline 201 to pass through, the first negative pressure control valve 203 can be a pneumatic control valve, and the first vacuum generator 202 is communicated with a pipeline between the first end of the first negative pressure pipeline 201 and the first negative pressure control valve 203 and is used for enabling the first negative pressure pipeline 201 to generate negative pressure.
The test pipeline 300 is provided with a first end and a second end which are opposite to each other, the first end of the test pipeline 300 is respectively communicated with the second end of the first positive pressure pipeline 101 and the second end of the first negative pressure pipeline 201, and the second end of the test pipeline 300 is used for being communicated with the test end of the valve to be tested 10.
A first flow meter 301 and a first pressure sensor 302 are respectively provided on the test line 300.
The working process is as follows: the first end of first positive pressure pipeline 101 is connected the air supply and is in order to produce the malleation, and the first end of first negative pressure pipeline 201 produces the negative pressure through first vacuum generator 202, and the first end of test pipeline 300 communicates respectively the second end of first positive pressure pipeline 101 and the second end of first negative pressure pipeline 201. The first positive pressure pipeline 101 provides positive pressure for the valve 10 to be tested, then the gas flow and the gas pressure in the pipeline are respectively tested through the first flowmeter 301 and the first pressure sensor 302 in the test pipeline 300, and whether the valve 10 to be tested leaks or not is judged according to the measured flow and gas pressure data.
When the first positive pressure pipeline 101 generates positive pressure, the first vacuum generator 202 does not work, the first negative pressure control valve 203 controls the gas in the first negative pressure pipeline 201 to be unable to pass through, and the first positive pressure pipeline 101 provides positive pressure for the valve 10 to be tested, so as to test whether the valve 10 to be tested leaks under the positive pressure condition.
When the first vacuum generator 202 generates negative pressure, the first positive pressure pipeline 101 no longer provides positive pressure to the valve 10 to be tested, the first positive pressure control valve 102 controls the gas in the first positive pressure pipeline 101 not to pass through, and the first negative pressure pipeline 201 provides negative pressure to the valve 10 to be tested, so that whether the valve 10 to be tested leaks under the condition of testing the negative pressure.
By arranging the first flowmeter 301 with different measuring ranges, the leakage condition of the valve 10 to be tested under different measuring accuracies can be tested.
In this embodiment, through above valve test equipment, a comprehensive test equipment is provided, utilize malleation test component 100, negative pressure test component 200 and test pipeline 300 can test the multiple operating mode of valve 10 that awaits measuring, can conveniently, learn the performance of valve fast, test circuit simple structure, integrated level height, efficiency of software testing height.
Optionally, in an embodiment, the positive pressure testing assembly 100 further includes a second positive pressure control valve 103 and/or a first positive pressure gas protection valve 104, the second positive pressure control valve 103 is disposed on the first positive pressure pipeline 101 and located between the first end of the first positive pressure pipeline 101 and the first positive pressure control valve 102 to control the gas passing through the first positive pressure pipeline 101, the second positive pressure control valve 103 may be a pneumatic control valve, the first positive pressure gas protection valve 104 is disposed on the first positive pressure pipeline 101 and located between the first positive pressure control valve 102 and the second positive pressure control valve 103, and the first positive pressure gas protection valve 104 is configured to limit the gas flow passing through so as to prevent the gas flow from impacting the first flow meter 301.
In this embodiment, the second positive pressure control valve 103 is disposed on the first positive pressure pipeline 101 to control the passing gas, so as to perform dual control on the gas, and when one positive pressure control valve is damaged, the other positive pressure control valve can continue to control the passing of the gas, thereby avoiding the excessive pressure in the pipeline. In addition, when the valve testing equipment comprises a plurality of valve testing devices and the first positive pressure pipelines 101 of the plurality of valve testing devices are connected with the same air source, when one of the valve testing devices works and the rest of the valve testing devices do not work, the second positive pressure control valve 103 of the valve testing device which does not work can be closed, so that the valve testing device which does not work can be prevented from influencing the valve testing device which works. The first positive pressure gas protection valve 104 can be used to control the maximum flow rate of the gas flow under the positive pressure condition, and the first positive pressure gas protection valve 104 can be used to further control the gas flow rate, so as to prevent the gas flow from impacting the first flow meter 301, and ensure the safety of the components in the positive pressure test assembly 100 and the smooth performance of the test operation.
In addition, the negative pressure test assembly 200 further comprises a second negative pressure control valve 204 and/or a first negative pressure gas protection valve 205, the second negative pressure control valve 204 is disposed on the first negative pressure pipeline 201 and is located between the first end of the first negative pressure pipeline 201 and the first vacuum generator 202 to control the passage of the first negative pressure pipeline 201, the first negative pressure gas protection valve 205 is disposed on the first negative pressure pipeline 201 and is located between the first vacuum generator 202 and the first negative pressure control valve 203, and the first negative pressure gas protection valve 205 is used for limiting the flow rate of the passing gas to prevent the gas flow from impacting the first flow meter 301.
In this embodiment, similarly, the first negative pressure gas protection valve 205 may be used to control the maximum flow rate of the gas flow under the negative pressure condition, and by providing the second negative pressure control valve 204 and/or the first negative pressure gas protection valve 205 on the first negative pressure pipeline 201, the first flow meter 301 is prevented from being damaged by the excessive gas flow flowing through the first flow meter 301, and the smooth performance of the test operation of the negative pressure test assembly 200 is ensured.
Optionally, in one embodiment, the positive pressure testing assembly 100 further comprises a second positive pressure control valve 103 and a first positive pressure gas protection valve 104, and the negative pressure testing assembly 200 further comprises a second negative pressure control valve 204 and a first negative pressure gas protection valve 205; the valve test equipment comprises a plurality of valve test devices, and the first ends of the first positive pressure pipelines 101 of the valve test devices are simultaneously connected with the same air source.
In this embodiment, through setting up a plurality of valve testing arrangement, can test respectively the condition of revealing of the measurement accuracy condition of valve, only need switch over the air supply and the valve testing arrangement malleation pipeline or the relation of connection of the first end of negative pressure pipeline can, need not carry out complicated line connection again and change first flowmeter 301 and can realize, convenient operation, efficiency of software testing is high.
Optionally, in one embodiment, the valve testing apparatus comprises a plurality of valve testing devices, each valve testing device having a different test range for the first flow meter 301. The first flow meters 301 with different test ranges are used for measuring the leakage condition of the valve 10 to be tested under different measurement precision conditions, so that the application range of the valve test equipment can be widened.
Further, optionally, in an embodiment, the valve testing apparatus includes three valve testing devices, which are the first valve testing device 11, the second valve testing device 12, and the third valve testing device 13, respectively, and respectively test the leakage condition of the valve under the conditions of different measurement accuracies. The test range of the first flowmeter 301 of the first valve test device 11 is-0.050L/min to +0.050L/min, and the test precision is 0.0001L/min; the test range of the first flowmeter 301 of the second valve test device 12 is-0.5L/min- +0.5L/min, and the test precision is 0.001L/mi; the test range of the first flowmeter 301 of the third valve test device 13 is-50L/min to +50L/min, and the test precision is 0.1L/min. The flow meters with different ranges are correspondingly adopted for different flow rates to improve the accuracy and precision of the test, and of course, the range of the first flow meter 301 is not limited thereto, and can be selected according to the actual flow rate.
Specifically, when the test range of the first flow meter 301 of the first valve test device 11 is-0.050L/min to +0.050L/min and the test accuracy is 0.0001L/min, the micro-leakage condition under the positive pressure or negative pressure condition of the valve can be tested due to the high measurement accuracy of the first flow meter 301.
When the test range of the first flowmeter 301 of the second valve testing device 12 is-0.5L/min- +0.5L/min, and the test precision is 0.001L/min, the opening point of the valve can be tested, taking the valve 10 to be tested as the oil tank isolation valve in chinese patent CN110486483A as an example, during measurement, the second end of the test pipeline 300 is communicated with the oil tank end of the oil tank isolation valve (communicated with the first gas guide port of the oil tank), and by continuously applying positive pressure to the oil tank isolation valve, the gas pressure and flow rate when the sub-valve head overcomes the return spring to perform pressure relief under the pressure relief working condition can be measured, so as to obtain the flow rate under the pressure relief working condition of the oil tank isolation valve.
When the test range of the first flowmeter 301 of the third valve testing device 13 is-50L/min- +50L/min, and the test precision is 0.1L/min, the mechanical opening flow of the valve can be tested, taking the valve 10 to be tested as an oil tank isolation valve in chinese patent CN110486483A as an example, during measurement, the second end of the test pipeline 300 is communicated with the oil tank end of the oil tank isolation valve (communicated with the first gas guide port of the oil tank), and by applying positive pressure to the oil tank isolation valve, the gas pressure and flow when the controller controls the combined valve head to lift under the oil filling condition can be measured, so as to obtain the flow when the oil tank isolation valve is mechanically opened.
Optionally, in an embodiment, the valve testing apparatus further includes a differential pressure flow testing device 400, and the differential pressure flow testing device 400 includes: a differential pressure line 401, a differential pressure test line 402, a second flow meter 4021, a second pressure sensor 4022, and a differential pressure meter 403.
Be provided with two third positive pressure control valve 4011 on pressure differential pipeline 401 and set up two second positive pressure gas protection valve 4012 between the third positive pressure control valve 4011, third positive pressure control valve 4011 is used for control the interior gas of pressure differential pipeline 401 passes through, and third positive pressure control valve 4011 can be the gas accuse valve, second positive pressure gas protection valve 4012 is used for restricting the gas flow who passes through, protects second flowmeter 4021, pressure differential pipeline 401 has relative first end and second end, the first end of pressure differential pipeline 401 is used for connecting the air supply.
The differential pressure test pipeline 402 is provided with a first end and a second end which are opposite to each other, the first end of the differential pressure test pipeline 402 is communicated with the second end of the differential pressure pipeline 401, and the second end of the differential pressure test pipeline 402 is used for supplying air to an air inlet of the valve 10 to be tested.
The second flow meter 4021 and the second pressure sensor 4022 are respectively disposed on the differential pressure test line 402. Two ends of the differential pressure gauge 403 are respectively communicated with the air outlet of the valve to be tested 10 and the second end of the differential pressure testing pipeline 402.
In this embodiment, positive pressure gas is supplied to the valve 10 to be tested through the differential pressure pipeline 401 and the differential pressure test pipeline 402, and the differential pressure gauge 403 is used to test the differential pressure between the gas inlet and the gas outlet of the valve 10 to be tested, so as to obtain the differential pressure of the gas flowing through the two ports of the valve 10 to be tested, and further obtain the flow resistance condition of the valve.
Optionally, in an embodiment, the valve testing apparatus further comprises a housing 500, and the valve testing device is disposed in the housing 500; the casing 500 is provided with a first positive pressure controller 501, a first negative pressure controller 502, a first display 503, a second display 504 and a first interface 505, the first positive pressure controller 501 is connected with the first positive pressure control valve 102 to control the opening and closing of the first positive pressure control valve 102, the first negative pressure controller 502 is connected with the first negative pressure control valve 203 to control the opening and closing of the first negative pressure control valve 203, the first display 503 is used for displaying the measurement value of the first pressure sensor 302, the second display 504 is used for displaying the measurement value of the first flowmeter 301, and the first interface 505 is used for respectively communicating the second end of the test pipeline 300 and the test end of the valve 10 to be tested. When the valve testing apparatus includes a plurality of valve testing devices, the housing 500 may include a plurality of sets of the first positive pressure controller 501, the first negative pressure controller 502, the first display 503, the second display 504, and the first interface 505, so as to be used for separately controlling the first positive pressure controller 501 and the first negative pressure controller 502 and displaying the flow rate and the pressure respectively during the tightness test, the opening point test, and the mechanical opening flow rate test, respectively.
The housing 500 is further provided with a second positive pressure controller 506, a third display 507, a fourth display 508 and a second interface 509, the second positive pressure controller 506 is connected with the third positive pressure control valve 4011 to control the opening and closing of the third positive pressure control valve 4011, the third display 507 is used for displaying a measurement value of the second pressure sensor 4022, the fourth display 508 is used for displaying a measurement value of the second flow meter 4021, and the second interface 509 is used for respectively communicating the second end of the differential pressure test pipeline 402 with an air inlet of the valve to be tested 10.
In this embodiment, the opening degree and the closing of each control valve are controlled by each controller, each pressure value and flow value are displayed by the display, and the pipeline and the valve 10 to be tested are communicated by the air channel by each interface, so that each circuit of the valve testing equipment can be conveniently connected, test data can be displayed, and further, rapid testing is realized, and data reading is convenient.
Optionally, in an embodiment, the valve testing apparatus further includes a simulation testing device 600, and the simulation testing device 600 includes: a second positive pressure line 601, a second negative pressure line 602, a first analog test line 603, a gas tank 700, a third pressure sensor 703, a second analog test line 604, a fourth pressure sensor 6041, and a fifth control valve 6042.
The second positive pressure pipeline 601 is provided with two fourth positive pressure control valves 6011 and a third positive pressure gas protection valve 6012 arranged between the two fourth positive pressure control valves 6011, the fourth positive pressure control valve 6011 is used for controlling the passage of gas in the second positive pressure pipeline 601, the fourth positive pressure control valve 6011 is, for example, a gas control valve, the third positive pressure gas protection valve 6012 is used for limiting the flow rate of the gas passing through, protecting a flow meter and other parts and preventing the impact of atmospheric flow, the second positive pressure pipeline 601 has a first end and a second end which are opposite to each other, and the first end of the second positive pressure pipeline 601 is used for connecting a gas source.
The second negative pressure pipeline 602 is provided with two third negative pressure control valves 6021, and a second negative pressure gas protection valve 6022 and a second vacuum generator 6023 arranged between the two third negative pressure control valves 6021, the third negative pressure control valve 6021 is used to control the passage of the gas in the second negative pressure line 602, and the third negative pressure control valve 6021 is, for example, a pneumatic control valve, the second negative pressure gas shield valve 6022 functions to restrict the flow of gas therethrough, protect the flow meter and other components, prevent the impact of atmospheric flow, the second negative pressure line 602 has opposite first and second ends, the second vacuum generator 6023 communicates the line between the first end of the second negative pressure line 602 and the third negative pressure control valve 6021 and serves to generate negative pressure in the second negative pressure line 602, the second vacuum generator 6023 is closer to the first end of the second negative pressure line 602 than the second negative pressure gas protection valve 6022.
The first simulation test pipeline 603 has a first end and a second end opposite to each other, and the first end of the first simulation test pipeline 603 is respectively communicated with the second end of the second positive pressure pipeline 601 and the second end of the second negative pressure pipeline 602.
The gas tank 700 is provided with a first vent 701 and a second vent 702 which are communicated with the inner cavity of the gas tank 700, and the first vent 701 is communicated with the second end of the first simulation test pipeline 603.
The third pressure sensor 703 is provided on the gas tank 700 to acquire the pressure in the gas tank 700.
The second simulation test pipeline 604 has a first end and a second end opposite to each other, the first end of the second simulation test pipeline 604 is communicated with the second vent 702 of the gas tank 700, the second end of the second simulation test pipeline 604 is used for communicating with the test end of the valve to be tested 10, and the test end of the valve to be tested 10 is, for example, the tank end of the tank isolation valve (the first air guide port communicated with the tank) in chinese patent CN 110486483A.
The fourth pressure sensor 6041 is disposed on the second analog test line 604.
The fifth control valve 6042 is provided on the second simulated test line 604 for passage of gas in the second simulated test line 604, and the fifth control valve 6042 is, for example, a pneumatic control valve.
In this embodiment, through the cooperation of gas pitcher 700, first simulation test pipeline 603, second malleation pipeline 601 and second simulation test pipeline 604, can simulate the pressure release time of valve 10 under the pressure release operating mode to know whether valve 10 under test satisfies the designing requirement under the pressure release operating mode. Specifically, taking the example that the valve 10 to be tested is the oil tank isolation valve in CN110486483A, the second end of the second simulation test pipeline 604 is communicated with the oil tank end of the oil tank isolation valve, first, the second negative pressure pipeline 602 is closed by the third negative pressure control valve 6021, the second simulation test pipeline 604 is closed by the fifth control valve 6042, then, positive pressure is provided to the air tank 700 by the second positive pressure pipeline 601, the air tank 700 is used for simulating the oil tank, the pressure in the air tank 700 is obtained by the third pressure sensor 703, when the pressure in the air tank 700 reaches a set value, the second positive pressure pipeline 601 is closed by the fourth positive pressure control valve 6011, the second simulation test pipeline 604 is opened by the fifth control valve 6042, the air tank 700 is communicated with the oil tank end of the oil tank isolation valve, the oil tank isolation valve performs air tank operation, the pressure relief time of the oil tank isolation valve is obtained by calculating the time of reducing the pressure in the air tank 700 from the set value to a preset value, therefore, whether the valve 10 to be tested meets the design requirements under the pressure relief working condition is known.
In addition, the air tank 700, the first simulation test pipeline 603, the second negative pressure pipeline 602 and the second simulation test pipeline 604 are matched, so that the air supplement time of the valve 10 to be tested under the air supplement working condition can be simulated, and whether the valve 10 to be tested meets the design requirements under the air supplement working condition is known. Specifically, taking the example that the valve 10 to be tested is the oil tank isolation valve in CN110486483A, the second end of the second analog testing pipeline 604 is connected to the oil tank end of the oil tank isolation valve, first, the second negative pressure pipeline 602 is opened by the third negative pressure control valve 6021, the second analog testing pipeline 604 is closed by the fifth control valve 6042, then, negative pressure is provided to the air tank 700 by the second negative pressure pipeline 602 and the second vacuum generator 6023, the air tank 700 is used for simulating the oil tank, the pressure in the air tank 700 is obtained by the third pressure sensor 703, when the pressure in the air tank 700 reaches the set value, the second negative pressure pipeline 602 is closed by the third negative pressure control valve 6021, the second analog testing pipeline 604 is opened by the fifth control valve 6042, the air tank 700 is connected to the oil tank end of the oil tank isolation valve, the oil tank isolation valve performs air supplement to the air tank 700, by calculating the time for the pressure in the air tank 700 to rise from the set value to the preset value, and acquiring the air supplementing time of the isolating valve of the oil tank, so as to know whether the valve 10 to be tested meets the design requirements under the air supplementing working condition.
Optionally, in an embodiment, the valve testing apparatus further comprises a housing 500, and the valve testing device is disposed in the housing 500; the casing 500 is provided with a first positive pressure controller 501, a first negative pressure controller 502, a first display 503, a second display 504 and a first interface 505, the first positive pressure controller 501 is connected with the first positive pressure control valve 102 to control the opening and closing of the first positive pressure control valve 102, the first negative pressure controller 502 is connected with the first negative pressure control valve 203 to control the opening and closing of the first negative pressure control valve 203, the first display 503 is used for displaying the measurement value of the first pressure sensor 302, the second display 504 is used for displaying the measurement value of the first flowmeter 301, and the first interface 505 is used for respectively communicating the second end of the test pipeline 300 and the test end of the valve 10 to be tested.
The housing 500 is further provided with a fifth display 5010, a sixth display 5011 and a third interface 5012, the fifth display 5010 is used for displaying the measured value of the third pressure sensor 703 when the pressure in the gas tank 700 is positive, the sixth display 5011 is used for displaying the measured value of the third pressure sensor 703 when the pressure in the gas tank 700 is negative, and the third interface 5012 is used for respectively communicating the second end of the second simulation test pipeline 604 with the test end of the valve to be tested 10.
In this embodiment, the opening degree and the closing of each control valve are controlled by each controller, each pressure value and flow value are displayed by the display, and the pipeline and the valve 10 to be tested are communicated by the air channel by each interface, so that each circuit of the valve testing equipment can be conveniently connected, test data can be displayed, and further, rapid testing is realized, and data reading is convenient.
Optionally, in an embodiment, the valve testing apparatus further includes a system controller, the system controller is connected to the third pressure sensor 703 and the second vacuum generator 6023, and the system controller controls the air supply to the first end of the second positive pressure line 601 and the vacuum pumping of the second vacuum generator 6023 according to a measurement value of the third pressure sensor 703.
In this embodiment, the system controller is used to determine the working conditions of each component in the system circuit according to the measured values of the third pressure sensor 703 and the second vacuum generator 6023, and provide positive pressure or negative pressure to the pipeline at a proper time to test the pressure relief or air supplement condition of the valve 10 to be tested under positive pressure or negative pressure.
The valve testing device can be used for various working conditions of valve testing, and the testing conditions of the various working conditions are described respectively below.
1. Valve tightness test
When the first valve testing device 11 is used for testing the tightness of the valve 10 to be tested, the testing range of the first flowmeter 301 is-0.050L/min to +0.050L/min, and the testing precision is 0.0001L/min.
2. Valve opening point test
When the valve is opened at an instant, the second valve testing device 12 is used for testing, at this time, the testing range of the first flowmeter 301 is-0.5L/min- +0.5L/min, and the testing precision is 0.001L/min.
3. Mechanical turn-on flow test
When the valve is fully opened, the third valve testing device 13 is used for testing, and at the moment, the testing range of the first flowmeter 301 is-50L/min to +50L/min, and the testing precision is 0.1L/min.
4. Flow resistance test
The differential pressure flow testing device 400 is used for measuring the flow resistance of the valve 10 to be tested.
5. Simulated fueling test
And simulating the working condition of the valve during pressure relief or air supply, and simulating the operating condition of the valve to be tested 10 during pressure relief when the oil tank generates positive pressure by matching the first simulation test pipeline 603 and the second positive pressure pipeline 601. And then, the second simulation test pipeline 604 is matched with the second negative pressure pipeline 602 to simulate the pressure condition and the pressure relief time of the pipeline under the air supply condition so as to observe the air supply working condition and the air supply time of the valve 10 to be tested.
Although embodiments of the present invention have been shown and described, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the spirit and scope of the present invention, all such changes being within the scope of the appended claims.

Claims (10)

1. A valve testing apparatus comprising a valve testing device, the valve testing device comprising:
a positive pressure test assembly comprising: the first positive pressure pipeline is provided with a first end and a second end which are opposite, the first end of the first positive pressure pipeline is used for being connected with an air source, and the first positive pressure control valve is arranged on the first positive pressure pipeline and used for controlling the gas in the first positive pressure pipeline to pass through;
negative pressure test assembly includes: the vacuum control system comprises a first negative pressure pipeline, a first vacuum generator and a first negative pressure control valve, wherein the first negative pressure pipeline is provided with a first end and a second end which are opposite to each other, the first negative pressure control valve is arranged on the first negative pressure pipeline and is used for controlling the gas in the first negative pressure pipeline to pass through, and the first vacuum generator is communicated with a pipeline between the first end of the first negative pressure pipeline and the first negative pressure control valve and is used for enabling the first negative pressure pipeline to generate negative pressure;
the first end of the test pipeline is respectively communicated with the second end of the first positive pressure pipeline and the second end of the first negative pressure pipeline, and the second end of the test pipeline is used for being communicated with the test end of the valve to be tested;
the first flowmeter and the first pressure sensor are respectively arranged on the test pipeline.
2. The valve testing apparatus of claim 1, wherein the positive pressure testing assembly further comprises a second positive pressure control valve and/or a first positive pressure gas protection valve, the second positive pressure control valve being disposed on the first positive pressure line and between a first end of the first positive pressure line and the first positive pressure control valve to control passage of the first positive pressure line, the first positive pressure gas protection valve being disposed on the first positive pressure line and between the first positive pressure control valve and the second positive pressure control valve, the first positive pressure gas protection valve being configured to restrict a flow of gas therethrough to prevent the flow of gas from impinging on the first flow meter; and/or the presence of a gas in the gas,
the negative pressure test assembly further comprises a second negative pressure control valve and/or a first negative pressure gas protection valve, the second negative pressure control valve is arranged on the first negative pressure pipeline and located between the first end of the first negative pressure pipeline and the first vacuum generator to control the passing of the first negative pressure pipeline, the first negative pressure gas protection valve is arranged on the first negative pressure pipeline and located between the first vacuum generator and the first negative pressure control valve, and the first negative pressure gas protection valve is used for limiting the passing gas flow to prevent the gas flow from impacting the first flowmeter.
3. The valve testing apparatus of claim 2, wherein the positive pressure testing assembly further comprises a second positive pressure control valve and a first positive pressure gas protection valve, and the negative pressure testing assembly further comprises a second negative pressure control valve and a first negative pressure gas protection valve;
the valve testing equipment comprises a plurality of valve testing devices, and the first ends of the first positive pressure pipelines of the valve testing devices are connected with the same air source at the same time.
4. The valve testing apparatus of claim 1, wherein the valve testing apparatus comprises a plurality of valve testing devices, the first flow meter of each valve testing device having a different testing accuracy and testing range.
5. The valve testing apparatus of claim 4, wherein the valve testing apparatus comprises three valve testing devices, the three valve testing devices are a first valve testing device, a second valve testing device and a third valve testing device respectively, the first flow meter of the first valve testing device has a testing range of-0.050L/min to +0.050L/min and a testing precision of 0.0001L/min; the test range of the first flowmeter of the second valve test device is-0.5L/min- +0.5L/min, and the test precision is 0.001L/min; the test range of the first flowmeter of the third valve test device is-50L/min to +50L/min, and the test precision is 0.1L/min.
6. The valve testing apparatus of claim 1, further comprising a differential pressure flow test device, the differential pressure flow test device comprising:
the pressure difference pipeline is provided with two third positive pressure control valves and a second positive pressure gas protection valve arranged between the two third positive pressure control valves, the third positive pressure control valves are used for controlling the passing of gas in the pressure difference pipeline, the second positive pressure gas protection valve is used for limiting the flow of the passing gas, the pressure difference pipeline is provided with a first end and a second end which are opposite, and the first end of the pressure difference pipeline is used for being connected with a gas source;
the pressure difference testing pipeline is provided with a first end and a second end which are opposite, the first end of the pressure difference testing pipeline is communicated with the second end of the pressure difference pipeline, and the second end of the pressure difference testing pipeline is used for supplying air to an air inlet of the valve to be tested;
the second flowmeter and the second pressure sensor are respectively arranged on the differential pressure testing pipeline;
and two ends of the differential pressure gauge are respectively communicated with the air outlet of the valve to be tested and the second end of the differential pressure testing pipeline.
7. The valve testing apparatus of claim 6, further comprising a housing, the valve testing device being disposed within the housing;
the shell is provided with a first positive pressure controller, a first negative pressure controller, a first display, a second display and a first interface, the first positive pressure controller is connected with the first positive pressure control valve to control the opening and closing of the first positive pressure control valve, the first negative pressure controller is connected with the first negative pressure control valve to control the opening and closing of the first negative pressure control valve, the first display is used for displaying the measured value of the first pressure sensor, the second display is used for displaying the measured value of the first flowmeter, and the first interface is used for respectively communicating the second end of the test pipeline with the test end of the valve to be tested;
set up second positive pressure controller, third display, fourth display and second interface in addition on the shell, the opening and closing of third positive pressure control valve in order to control third positive pressure control valve are connected to the second positive pressure controller, the third display is used for showing second pressure sensor's measured value, the fourth display is used for showing the measured value of second flowmeter, the second interface is used for communicateing respectively the second end of differential pressure test pipeline with the air inlet of valve to be tested.
8. The valve testing apparatus of claim 1, further comprising a simulation testing device, the simulation testing device comprising:
the second positive pressure pipeline is provided with two fourth positive pressure control valves and a third positive pressure gas protection valve arranged between the two fourth positive pressure control valves, the fourth positive pressure control valves are used for controlling the gas in the second positive pressure pipeline to pass through, the third positive pressure gas protection valve is used for limiting the flow of the gas passing through, the second positive pressure pipeline is provided with a first end and a second end which are opposite, and the first end of the second positive pressure pipeline is used for being connected with a gas source;
the second negative pressure pipeline is provided with two third negative pressure control valves, a second negative pressure gas protection valve and a second vacuum generator, the second negative pressure gas protection valve is arranged between the two third negative pressure control valves, the third negative pressure control valves are used for controlling the passing of gas in the second negative pressure pipeline, the second negative pressure gas protection valve is used for limiting the flow of the passing gas, the second negative pressure pipeline is provided with a first end and a second end which are opposite, the second vacuum generator is communicated with the pipeline between the first end of the second negative pressure pipeline and the third negative pressure control valves and is used for enabling the second negative pressure pipeline to generate negative pressure, and the second vacuum generator is closer to the first end of the second negative pressure pipeline than the second negative pressure gas protection valve;
the first simulation test pipeline is provided with a first end and a second end which are opposite, and the first end of the first simulation test pipeline is respectively communicated with the second end of the second positive pressure pipeline and the second end of the second negative pressure pipeline;
the gas tank is provided with a first vent hole and a second vent hole which are communicated with the inner cavity of the gas tank, and the first vent hole is communicated with the second end of the first simulation test pipeline;
a third pressure sensor provided on the gas tank to acquire a pressure inside the gas tank;
the second simulation test pipeline is provided with a first end and a second end which are opposite, the first end of the second simulation test pipeline is communicated with the second vent of the gas tank, and the second end of the second simulation test pipeline is used for being communicated with the test end of the valve to be tested;
a fourth pressure sensor disposed on the second analog test line;
and the fifth control valve is arranged on the second simulation test pipeline so as to simulate the passing of gas in the test pipeline.
9. The valve testing apparatus of claim 8, further comprising a housing, the valve testing device being disposed within the housing;
the shell is provided with a first positive pressure controller, a first negative pressure controller, a first display, a second display and a first interface, the first positive pressure controller is connected with the first positive pressure control valve to control the opening and closing of the first positive pressure control valve, the first negative pressure controller is connected with the first negative pressure control valve to control the opening and closing of the first negative pressure control valve, the first display is used for displaying the measured value of the first pressure sensor, the second display is used for displaying the measured value of the first flowmeter, and the first interface is used for respectively communicating the second end of the test pipeline with the test end of the valve to be tested;
the shell is provided with a fifth display, a sixth display and a third interface, the fifth display is used for displaying the measured value of a third pressure sensor when positive pressure exists in the air tank, the sixth display is used for displaying the measured value of the third pressure sensor when negative pressure exists in the air tank, and the third interface is used for respectively communicating the second end of the second simulation test pipeline with the test end of the valve to be tested.
10. The valve testing apparatus of claim 8, further comprising a system controller, wherein the system controller is connected to the third pressure sensor and the second vacuum generator, and the system controller controls the supply of air to the first end of the second positive pressure line and the evacuation of the second vacuum generator according to a measurement value of the third pressure sensor.
CN202210104993.1A 2022-01-28 2022-01-28 Valve test equipment Pending CN114593879A (en)

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CN202210104993.1A CN114593879A (en) 2022-01-28 2022-01-28 Valve test equipment

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Application Number Priority Date Filing Date Title
CN202210104993.1A CN114593879A (en) 2022-01-28 2022-01-28 Valve test equipment

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CN101382236A (en) * 2008-09-28 2009-03-11 张永华 Fluid multi-pipeline collecting transmission and distribution control system and control method
CN106979162A (en) * 2017-04-26 2017-07-25 广东肯富来泵业股份有限公司 Pump closed testing bench control system and method for testing
CN107014598A (en) * 2017-04-21 2017-08-04 合肥通用机械研究院 A kind of air valve air inlet performance testing device and method of testing
CN109596281A (en) * 2018-12-29 2019-04-09 广东德洛斯照明工业有限公司 A kind of test device for air tightness and test method
CN209961427U (en) * 2019-07-19 2020-01-17 深圳万测试验设备有限公司 Gas positive and negative pressure micro-pressure leakage quantity detection device
CN112240819A (en) * 2020-11-13 2021-01-19 西安航天远征流体控制股份有限公司 Valve detection system
CN113125145A (en) * 2021-04-07 2021-07-16 成都特恩达燃气设备有限公司 Gas valve testing device and testing method
CN113669328A (en) * 2021-08-23 2021-11-19 徐州徐工挖掘机械有限公司 Oil tank breather valve performance detection device and test method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101382236A (en) * 2008-09-28 2009-03-11 张永华 Fluid multi-pipeline collecting transmission and distribution control system and control method
CN107014598A (en) * 2017-04-21 2017-08-04 合肥通用机械研究院 A kind of air valve air inlet performance testing device and method of testing
CN106979162A (en) * 2017-04-26 2017-07-25 广东肯富来泵业股份有限公司 Pump closed testing bench control system and method for testing
CN109596281A (en) * 2018-12-29 2019-04-09 广东德洛斯照明工业有限公司 A kind of test device for air tightness and test method
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