CN105738049A - Large aperture valve thermal state test mechanism - Google Patents
Large aperture valve thermal state test mechanism Download PDFInfo
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- CN105738049A CN105738049A CN201610114390.4A CN201610114390A CN105738049A CN 105738049 A CN105738049 A CN 105738049A CN 201610114390 A CN201610114390 A CN 201610114390A CN 105738049 A CN105738049 A CN 105738049A
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- valve
- electrical heating
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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
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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a large aperture valve thermal state test mechanism, comprising a surge tank connected to an air storage tank; a test pressure plate is arranged on the back of the surge tank; a tested valve is installed between the surge tank and the test pressure plate; the surge tank, the test pressure plate and the tested valve are communicated with each other to form a cavity; the surge tank, the test plate and the tested valve are positioned in an electric heating room; the upper part, the lower part, the left part, the right part, the front part and the back part inside the electric heating room are provided with electric heaters; an air delivery pipe is provided with a second stop valve and a regulation valve; the second stop valve is arranged in front of the regulation valve; the air storage tank is provided with a first safety valve, a first pressure sensor, and a first temperature sensor; the surge tank is provided with a second safety valve, a second pressure sensor and a second temperature sensor; the test pressure plate is provided with a discharging valve; and the tested valve is connected to a drive device which drives the tested valve to start and stop. The large aperture valve thermal state test mechanisminvention is reasonable in structure and improves the reliability of the valve working.
Description
Technical field
The present invention relates to a kind of hot mechanism for testing of large bore valves.
Background technology
The experiments of sealing performance of usual large bore valves carries out all at normal temperatures, due to the impact of degradation complicated factor by expanding with heat and contract with cold under the condition of high temperature, under material property, the product that often cold test is qualified, is used under actual worst hot case, occurs leakage to exceed standard, the problem such as jam, poor reliability.
Summary of the invention
It is an object of the invention to provide a kind of rational in infrastructure, improve the hot mechanism for testing of large bore valves of the functional reliability of valve.
The technical solution of the present invention is:
A kind of hot mechanism for testing of large bore valves, is characterized in that: include vacuum tank tank connected with gas storage, arranges pressure testing plate after vacuum tank, fills tested valve between vacuum tank and pressure testing plate, and vacuum tank, pressure testing plate, tested valve three communicate composition cavity；Vacuum tank, pressure testing plate, tested valve are respectively positioned in electrical heating room, and up, down, left, right, before and after within described electrical heating room is hexahedro is respectively provided with electric heater；Appendix arranges the second stop valve, regulates valve, and the second stop valve is positioned at adjustment valve front；Air accumulator is provided with the first relief valve, the first pressure transducer, the first temperature sensor；Vacuum tank arranges the second relief valve, the second pressure transducer, the second temperature sensor；Pressure testing plate arranges diffusion valve；Tested valve is connected with the driving device driving tested valve to open and close.
Using method: before test, first by driving device action, opens tested valve, can all or part of open；Second stop valve is closed；Start the electric heater on internal six faces of up, down, left, right, before and after, electrical heating room, open the second stop valve, compression air entrance vacuum tank, pressure testing plate, tested valve three communicate in composition cavity, flow velocity is by governor valve control, temperature, pressure in cavity all rise, after pressure, temperature rise to setting value, stablize a period of time；Close the second stop valve and electrical heating, close tested valve, open diffusion valve, observe the second pressure transducer, without falling pressure for qualified.
If tested valve is the form with two way seal function, then, after the test of another side, rotates 180 ° around valve shaft centrage, repeat test process.
Up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 3-10 electric heater, and electric heater is uniformly distributed.
Up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 3 electric heaters, and electric heater is uniformly distributed.
Up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 5 electric heaters, and electric heater is uniformly distributed.
Up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 8 electric heaters, and electric heater is uniformly distributed.
Up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 9 electric heaters, and electric heater is uniformly distributed.
Up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 10 electric heaters, and electric heater is uniformly distributed.
Up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 4 electric heaters, and electric heater is uniformly distributed.
Present configuration is reasonable, is effectively improved the functional reliability of valve.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the structural representation of one embodiment of the invention.
Detailed description of the invention
Embodiment 1:
A kind of hot mechanism for testing of large bore valves, including the vacuum tank 5 being connected with air accumulator 1, arranges pressure testing plate 6 after vacuum tank, fill tested valve 7 between vacuum tank and pressure testing plate, and vacuum tank, pressure testing plate, tested valve three communicate composition cavity；Vacuum tank, pressure testing plate, tested valve are respectively positioned in electrical heating room, and up, down, left, right, before and after within described electrical heating room is hexahedro is respectively provided with electric heater 8；Appendix arranges the second stop valve 9, regulates valve 10, and the second stop valve is positioned at adjustment valve front；Air accumulator is provided with first relief valve the 11, first pressure transducer the 12, first temperature sensor 13；Vacuum tank arranges second relief valve the 14, second pressure transducer the 15, second temperature sensor 16；Pressure testing plate arranges diffusion valve 17；Tested valve is connected with the driving device driving tested valve to open and close.
Air accumulator is connected with air compression station or air pressure pump by the first stop valve 2, and the outlet side of air accumulator is connected with the vacuum tank 5 in electrical heating room 4 by appendix 3.
Using method: before test, first by driving device action, opens tested valve, can all or part of open；Then opening the first stop valve, now the second stop valve is closed；Start the electric heater on internal six faces of up, down, left, right, before and after, electrical heating room, it is inflated to after setting pressure until air accumulator, close the first stop valve, open the second stop valve, compression air entrance vacuum tank, pressure testing plate, tested valve three communicate in composition cavity, and flow velocity is by governor valve control, and temperature, pressure in cavity all rise, after pressure, temperature rise to setting value, stablize a period of time；Close the second stop valve and electrical heating, close tested valve, open diffusion valve, observe the second pressure transducer, without falling pressure for qualified.
If tested valve is the form with two way seal function, then, after the test of another side, rotates 180 ° around valve shaft centrage, repeat test process.
Up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 3 electric heaters, and electric heater is uniformly distributed.
Embodiment 2:
A kind of hot mechanism for testing of large bore valves, including vacuum tank tank connected with gas storage, arranges pressure testing plate after vacuum tank, fill tested valve between vacuum tank and pressure testing plate, and vacuum tank, pressure testing plate, tested valve three communicate composition cavity；Vacuum tank, pressure testing plate, tested valve are respectively positioned in electrical heating room, and up, down, left, right, before and after within described electrical heating room is hexahedro is respectively provided with electric heater；Appendix arranges the second stop valve, regulates valve, and the second stop valve is positioned at adjustment valve front；Air accumulator is provided with the first relief valve, the first pressure transducer, the first temperature sensor；Vacuum tank arranges the second relief valve, the second pressure transducer, the second temperature sensor；Pressure testing plate arranges diffusion valve；Tested valve is connected with the driving device driving tested valve to open and close.
Using method: before test, first by driving device action, opens tested valve, can all or part of open；Then opening the first stop valve, now the second stop valve is closed；Start the electric heater on internal six faces of up, down, left, right, before and after, electrical heating room, it is inflated to after setting pressure until air accumulator, close the first stop valve, open the second stop valve, compression air entrance vacuum tank, pressure testing plate, tested valve three communicate in composition cavity, and flow velocity is by governor valve control, and temperature, pressure in cavity all rise, after pressure, temperature rise to setting value, stablize a period of time；Close the second stop valve and electrical heating, close tested valve, open diffusion valve, observe the second pressure transducer, without falling pressure for qualified.
If tested valve is the form with two way seal function, then, after the test of another side, rotates 180 ° around valve shaft centrage, repeat test process.
Up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 5 electric heaters, and electric heater is uniformly distributed.
Embodiment 3:
A kind of hot mechanism for testing of large bore valves, including vacuum tank tank connected with gas storage, arranges pressure testing plate after vacuum tank, fill tested valve between vacuum tank and pressure testing plate, and vacuum tank, pressure testing plate, tested valve three communicate composition cavity；Vacuum tank, pressure testing plate, tested valve are respectively positioned in electrical heating room, and up, down, left, right, before and after within described electrical heating room is hexahedro is respectively provided with electric heater；Appendix arranges the second stop valve, regulates valve, and the second stop valve is positioned at adjustment valve front；Air accumulator is provided with the first relief valve, the first pressure transducer, the first temperature sensor；Vacuum tank arranges the second relief valve, the second pressure transducer, the second temperature sensor；Pressure testing plate arranges diffusion valve；Tested valve is connected with the driving device driving tested valve to open and close.
Using method: before test, first by driving device action, opens tested valve, can all or part of open；Then opening the first stop valve, now the second stop valve is closed；Start the electric heater on internal six faces of up, down, left, right, before and after, electrical heating room, it is inflated to after setting pressure until air accumulator, close the first stop valve, open the second stop valve, compression air entrance vacuum tank, pressure testing plate, tested valve three communicate in composition cavity, and flow velocity is by governor valve control, and temperature, pressure in cavity all rise, after pressure, temperature rise to setting value, stablize a period of time；Close the second stop valve and electrical heating, close tested valve, open diffusion valve, observe the second pressure transducer, without falling pressure for qualified.
If tested valve is the form with two way seal function, then, after the test of another side, rotates 180 ° around valve shaft centrage, repeat test process.
Up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 4 electric heaters, and electric heater is uniformly distributed.
Embodiment 4:
A kind of hot mechanism for testing of large bore valves, including vacuum tank tank connected with gas storage, arranges pressure testing plate after vacuum tank, fill tested valve between vacuum tank and pressure testing plate, and vacuum tank, pressure testing plate, tested valve three communicate composition cavity；Vacuum tank, pressure testing plate, tested valve are respectively positioned in electrical heating room, and up, down, left, right, before and after within described electrical heating room is hexahedro is respectively provided with electric heater；Appendix arranges the second stop valve, regulates valve, and the second stop valve is positioned at adjustment valve front；Air accumulator is provided with the first relief valve, the first pressure transducer, the first temperature sensor；Vacuum tank arranges the second relief valve, the second pressure transducer, the second temperature sensor；Pressure testing plate arranges diffusion valve；Tested valve is connected with the driving device driving tested valve to open and close.
Using method: before test, first by driving device action, opens tested valve, can all or part of open；Then opening the first stop valve, now the second stop valve is closed；Start the electric heater on internal six faces of up, down, left, right, before and after, electrical heating room, it is inflated to after setting pressure until air accumulator, close the first stop valve, open the second stop valve, compression air entrance vacuum tank, pressure testing plate, tested valve three communicate in composition cavity, and flow velocity is by governor valve control, and temperature, pressure in cavity all rise, after pressure, temperature rise to setting value, stablize a period of time；Close the second stop valve and electrical heating, close tested valve, open diffusion valve, observe the second pressure transducer, without falling pressure for qualified.
If tested valve is the form with two way seal function, then, after the test of another side, rotates 180 ° around valve shaft centrage, repeat test process.
Up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 6 electric heaters, and electric heater is uniformly distributed.
Embodiment 5:
A kind of hot mechanism for testing of large bore valves, including vacuum tank tank connected with gas storage, arranges pressure testing plate after vacuum tank, fill tested valve between vacuum tank and pressure testing plate, and vacuum tank, pressure testing plate, tested valve three communicate composition cavity；Vacuum tank, pressure testing plate, tested valve are respectively positioned in electrical heating room, and up, down, left, right, before and after within described electrical heating room is hexahedro is respectively provided with electric heater；Appendix arranges the second stop valve, regulates valve, and the second stop valve is positioned at adjustment valve front；Air accumulator is provided with the first relief valve, the first pressure transducer, the first temperature sensor；Vacuum tank arranges the second relief valve, the second pressure transducer, the second temperature sensor；Pressure testing plate arranges diffusion valve；Tested valve is connected with the driving device driving tested valve to open and close.
Using method: before test, first by driving device action, opens tested valve, can all or part of open；Then opening the first stop valve, now the second stop valve is closed；Start the electric heater on internal six faces of up, down, left, right, before and after, electrical heating room, it is inflated to after setting pressure until air accumulator, close the first stop valve, open the second stop valve, compression air entrance vacuum tank, pressure testing plate, tested valve three communicate in composition cavity, and flow velocity is by governor valve control, and temperature, pressure in cavity all rise, after pressure, temperature rise to setting value, stablize a period of time；Close the second stop valve and electrical heating, close tested valve, open diffusion valve, observe the second pressure transducer, without falling pressure for qualified.
If tested valve is the form with two way seal function, then, after the test of another side, rotates 180 ° around valve shaft centrage, repeat test process.
Up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 7 electric heaters, and electric heater is uniformly distributed.
Embodiment 6:
A kind of hot mechanism for testing of large bore valves, including vacuum tank tank connected with gas storage, arranges pressure testing plate after vacuum tank, fill tested valve between vacuum tank and pressure testing plate, and vacuum tank, pressure testing plate, tested valve three communicate composition cavity；Vacuum tank, pressure testing plate, tested valve are respectively positioned in electrical heating room, and up, down, left, right, before and after within described electrical heating room is hexahedro is respectively provided with electric heater；Appendix arranges the second stop valve, regulates valve, and the second stop valve is positioned at adjustment valve front；Air accumulator is provided with the first relief valve, the first pressure transducer, the first temperature sensor；Vacuum tank arranges the second relief valve, the second pressure transducer, the second temperature sensor；Pressure testing plate arranges diffusion valve；Tested valve is connected with the driving device driving tested valve to open and close.
Using method: before test, first by driving device action, opens tested valve, can all or part of open；Then opening the first stop valve, now the second stop valve is closed；Start the electric heater on internal six faces of up, down, left, right, before and after, electrical heating room, it is inflated to after setting pressure until air accumulator, close the first stop valve, open the second stop valve, compression air entrance vacuum tank, pressure testing plate, tested valve three communicate in composition cavity, and flow velocity is by governor valve control, and temperature, pressure in cavity all rise, after pressure, temperature rise to setting value, stablize a period of time；Close the second stop valve and electrical heating, close tested valve, open diffusion valve, observe the second pressure transducer, without falling pressure for qualified.
If tested valve is the form with two way seal function, then, after the test of another side, rotates 180 ° around valve shaft centrage, repeat test process.
Up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 8 electric heaters, and electric heater is uniformly distributed.
Embodiment 7:
A kind of hot mechanism for testing of large bore valves, including vacuum tank tank connected with gas storage, arranges pressure testing plate after vacuum tank, fill tested valve between vacuum tank and pressure testing plate, and vacuum tank, pressure testing plate, tested valve three communicate composition cavity；Vacuum tank, pressure testing plate, tested valve are respectively positioned in electrical heating room, and up, down, left, right, before and after within described electrical heating room is hexahedro is respectively provided with electric heater；Appendix arranges the second stop valve, regulates valve, and the second stop valve is positioned at adjustment valve front；Air accumulator is provided with the first relief valve, the first pressure transducer, the first temperature sensor；Vacuum tank arranges the second relief valve, the second pressure transducer, the second temperature sensor；Pressure testing plate arranges diffusion valve；Tested valve is connected with the driving device driving tested valve to open and close.
Using method: before test, first by driving device action, opens tested valve, can all or part of open；Then opening the first stop valve, now the second stop valve is closed；Start the electric heater on internal six faces of up, down, left, right, before and after, electrical heating room, it is inflated to after setting pressure until air accumulator, close the first stop valve, open the second stop valve, compression air entrance vacuum tank, pressure testing plate, tested valve three communicate in composition cavity, and flow velocity is by governor valve control, and temperature, pressure in cavity all rise, after pressure, temperature rise to setting value, stablize a period of time；Close the second stop valve and electrical heating, close tested valve, open diffusion valve, observe the second pressure transducer, without falling pressure for qualified.
If tested valve is the form with two way seal function, then, after the test of another side, rotates 180 ° around valve shaft centrage, repeat test process.
Up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 9 electric heaters, and electric heater is uniformly distributed.
Claims (10)
1. the hot mechanism for testing of large bore valves, is characterized in that: include vacuum tank tank connected with gas storage, arranges pressure testing plate after vacuum tank, fills tested valve between vacuum tank and pressure testing plate, and vacuum tank, pressure testing plate, tested valve three communicate composition cavity；Vacuum tank, pressure testing plate, tested valve are respectively positioned in electrical heating room, and up, down, left, right, before and after within described electrical heating room is hexahedro is respectively provided with electric heater；Appendix arranges the second stop valve, regulates valve, and the second stop valve is positioned at adjustment valve front；Air accumulator is provided with the first relief valve, the first pressure transducer, the first temperature sensor；Vacuum tank arranges the second relief valve, the second pressure transducer, the second temperature sensor；Pressure testing plate arranges diffusion valve；Tested valve is connected with the driving device driving tested valve to open and close.
2. the hot mechanism for testing of large bore valves according to claim 1, is characterized in that: it is characterized in that: using method: before test, first by driving device action, is opened by tested valve, can all or part of open；Second stop valve is closed；Start the electric heater on internal six faces of up, down, left, right, before and after, electrical heating room, open the second stop valve, compression air entrance vacuum tank, pressure testing plate, tested valve three communicate in composition cavity, flow velocity is by governor valve control, temperature, pressure in cavity all rise, after pressure, temperature rise to setting value, stablize a period of time；Close the second stop valve and electrical heating, close tested valve, open diffusion valve, observe the second pressure transducer, without falling pressure for qualified.
3. the hot mechanism for testing of large bore valves according to claim 2, is characterized in that: if tested valve is the form with two way seal function, then, after the test of another side, rotate 180 ° around valve shaft centrage, repeat test process.
4. the hot mechanism for testing of large bore valves according to claim 1, is characterized in that: up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 3-10 electric heater, and electric heater is uniformly distributed.
5. the hot mechanism for testing of large bore valves according to claim 1, is characterized in that: up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 3 electric heaters, and electric heater is uniformly distributed.
6. the hot mechanism for testing of large bore valves according to claim 1, is characterized in that: up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 5 electric heaters, and electric heater is uniformly distributed.
7. the hot mechanism for testing of large bore valves according to claim 1, is characterized in that: up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 8 electric heaters, and electric heater is uniformly distributed.
8. the hot mechanism for testing of large bore valves according to claim 1, is characterized in that: up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 9 electric heaters, and electric heater is uniformly distributed.
9. the hot mechanism for testing of large bore valves according to claim 1, is characterized in that: up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 10 electric heaters, and electric heater is uniformly distributed.
10. the hot mechanism for testing of large bore valves according to claim 1, is characterized in that: up, down, left, right, before and after within electrical heating room is hexahedro is respectively provided with 4 electric heaters, and electric heater is uniformly distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610114390.4A CN105738049B (en) | 2016-03-01 | 2016-03-01 | The application method of the hot mechanism for testing of large bore valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610114390.4A CN105738049B (en) | 2016-03-01 | 2016-03-01 | The application method of the hot mechanism for testing of large bore valves |
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| Publication Number | Publication Date |
|---|---|
| CN105738049A true CN105738049A (en) | 2016-07-06 |
| CN105738049B CN105738049B (en) | 2018-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610114390.4A Active CN105738049B (en) | 2016-03-01 | 2016-03-01 | The application method of the hot mechanism for testing of large bore valves |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484986A (en) * | 2020-11-17 | 2021-03-12 | 上海昱章电气成套设备有限公司 | Valve test system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4766765A (en) * | 1986-11-13 | 1988-08-30 | Westinghouse Electric Corp. | Multiphase valve testing |
| CN202814670U (en) * | 2012-07-30 | 2013-03-20 | 苏州泰伦思气体设备有限公司 | Valve air-tightness detection device |
| CN103411771A (en) * | 2013-09-02 | 2013-11-27 | 上海开维喜阀门集团有限公司 | Large environment simulation test device for pipeline ball valve test |
| CN103884479A (en) * | 2014-04-11 | 2014-06-25 | 慈溪市三洋电子有限公司 | Method and system for testing sealing performance of valve |
| CN103940559A (en) * | 2014-04-14 | 2014-07-23 | 石家庄新奥燃气有限公司 | Leak detection device for valve |
| CN205506318U (en) * | 2016-03-01 | 2016-08-24 | 江苏神通阀门股份有限公司 | Hot accredited testing organization of heavy -calibre valve |
-
2016
- 2016-03-01 CN CN201610114390.4A patent/CN105738049B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4766765A (en) * | 1986-11-13 | 1988-08-30 | Westinghouse Electric Corp. | Multiphase valve testing |
| CN202814670U (en) * | 2012-07-30 | 2013-03-20 | 苏州泰伦思气体设备有限公司 | Valve air-tightness detection device |
| CN103411771A (en) * | 2013-09-02 | 2013-11-27 | 上海开维喜阀门集团有限公司 | Large environment simulation test device for pipeline ball valve test |
| CN103884479A (en) * | 2014-04-11 | 2014-06-25 | 慈溪市三洋电子有限公司 | Method and system for testing sealing performance of valve |
| CN103940559A (en) * | 2014-04-14 | 2014-07-23 | 石家庄新奥燃气有限公司 | Leak detection device for valve |
| CN205506318U (en) * | 2016-03-01 | 2016-08-24 | 江苏神通阀门股份有限公司 | Hot accredited testing organization of heavy -calibre valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484986A (en) * | 2020-11-17 | 2021-03-12 | 上海昱章电气成套设备有限公司 | Valve test system |
| CN112484986B (en) * | 2020-11-17 | 2022-01-04 | 上海昱章电气股份有限公司 | Valve test system |
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| Publication number | Publication date |
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| CN105738049B (en) | 2018-04-06 |
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