CN114112236A - Exhaust test device and system - Google Patents
Exhaust test device and system Download PDFInfo
- Publication number
- CN114112236A CN114112236A CN202111366025.XA CN202111366025A CN114112236A CN 114112236 A CN114112236 A CN 114112236A CN 202111366025 A CN202111366025 A CN 202111366025A CN 114112236 A CN114112236 A CN 114112236A
- Authority
- CN
- China
- Prior art keywords
- end interface
- exhaust
- sealing gasket
- sealing
- automatic exhaust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- 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
- G01M3/30—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 using progressive displacement of one fluid by another
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Engines (AREA)
Abstract
The application provides an exhaust test device and a system, which belong to the technical field of aerospace fuel valve air tightness tests, and the device comprises a rear-end interface, a first sealing gasket, a second sealing gasket, a front-end interface and an automatic exhaust assembly, wherein the outlet end of the front-end interface is provided with the second sealing gasket, the side surface of the front-end interface is provided with the automatic exhaust assembly, an exhaust port of the automatic exhaust assembly is communicated with the inner cavity of the front-end interface, the automatic exhaust assembly is in sealing connection with the front-end interface, and one end of the rear-end interface is provided with the first sealing gasket; the rear end interface is provided with one end of a first sealing gasket and is in sealing connection with the outlet end of the fuel valve, and the front end interface is provided with the outlet end of a second sealing gasket and is in sealing connection with the inlet end of the fuel valve. This application satisfies the airtight requirement of product simultaneously, can be automatic with the evacuation of air in the system, in addition, testing arrangement can also send the signal of telecommunication to the suggestion air has been emptied, is used for the fuel valve.
Description
Technical Field
The application belongs to the technical field of fuel valve air tightness tests, and particularly relates to an exhaust test device and system.
Background
The structure of an air tightness test device of a fuel valve always refers to the structure of an air valve device, namely, a front end tool of a product is installed without an air emptying device. Because the test medium of the air valve is air, the process of emptying air during product test does not exist
However, testing fuel valves using this configuration can have drawbacks. The fuel entering the tool under the pressurizing condition and the compressed residual air exist in the tool, so that the valve actually bears the pressure generated by the mixture of the air and the fuel instead of the pressure generated by the pure fuel, and the design test requirement has great deviation. Air rather than fuel may be discharged during the air-tightness test, and wrong test results occur.
Disclosure of Invention
In order to solve the technical problems that air in a tool cavity is not eliminated and has great deviation with design test requirements during a fuel oil airtight test in the related art, the application provides an exhaust test device and system, and the technical scheme is as follows:
in a first aspect, there is provided an exhaust gas testing apparatus comprising: the automatic exhaust device comprises a rear end interface, a first sealing gasket, a second sealing gasket, a front end interface and an automatic exhaust assembly.
The outlet end of the front end interface is provided with a second sealing gasket, the side surface of the front end interface is provided with an automatic exhaust assembly, an exhaust port of the automatic exhaust assembly is communicated with the inner cavity of the front end interface, the automatic exhaust assembly is in sealing connection with the front end interface, and one end of the rear end interface is provided with a first sealing gasket;
the rear end interface is provided with one end of a first sealing gasket and is in sealing connection with the outlet end of the fuel valve, and the front end interface is provided with the outlet end of a second sealing gasket and is in sealing connection with the inlet end of the fuel valve.
The exhaust test device further comprises a signal transmission assembly, and the signal transmission assembly is in wired connection with the test bed;
the signal transmission assembly is arranged at an exhaust port of the automatic exhaust assembly and used for transmitting an exhaust signal to the test bed, and the exhaust signal is used for indicating that gas in an inner cavity of the front-end interface is exhausted.
The signal transmission assembly comprises a signaler and a clamp spring, the signaler is in wired connection with the test bed, and a hole groove is formed in the side face of the front-end interface;
the annunciator is fixedly connected with the automatic exhaust assembly through a clamp spring and is arranged in a hole groove of the front end interface, and the annunciator is in sealing connection with the automatic exhaust assembly through an O-shaped ring;
the annunciator is provided with a microswitch and is used for being opened under the action of gas exhaust force of the inner cavity of the front-end interface and triggering the annunciator to transmit an exhaust signal to the test bed.
The automatic exhaust assembly comprises a floating ball and a thimble;
the floating ball floats on the surface of the liquid by utilizing buoyancy, the position of the floating ball in the channel also synchronously rises along with the rise of the liquid level, and after the air in the inner cavity of the front end interface is exhausted, the floating ball is tightly pressed on an exhaust outlet of the automatic exhaust assembly under the action of the liquid pressure in the inner cavity, so that the automatic exhaust assembly is completely sealed, and meanwhile, the thimble is pushed to open the microswitch.
The automatic exhaust device is connected with the front end interface in a sealing mode through an O-shaped ring, and the O-shaped ring is made of a nitrile rubber material.
Wherein the first sealing gasket and the second sealing gasket are made of nitrile rubber materials.
Wherein the rear-end interface and the front-end interface are made of stainless steel.
In a second aspect, there is provided an exhaust gas testing system comprising: a vent test device and a fuel valve, the vent test device comprising the vent test device of the first aspect.
One end of the rear end interface of the exhaust test device, which is provided with a first sealing gasket, is in sealing connection with the outlet end of the fuel valve, and the outlet end of the front end interface, which is provided with a second sealing gasket, is in sealing connection with the inlet end of the fuel valve.
The application provides that the exhaust test device is installed in an exhaust test system, in the test process, fuel enters a front-end interface inner cavity from a fuel inlet, and air in the front-end interface inner cavity is automatically exhausted through an automatic exhaust assembly in the exhaust test device along with the gradual increase of the fuel; when the air is exhausted, the annunciator automatically outputs signals to display that the air in the inner cavity of the front-end interface is in an exhausted state, so that the air tightness test time of fuel products can be saved, and the accuracy of measured data is improved. The exhaust test device and the exhaust test system integrate structures such as a front end interface, a fuel valve, an automatic exhaust assembly, a annunciator, a rear end interface and a bolt, the whole test device is connected by the bolt, and the exhaust test device has the characteristics of compact structure, high strength and high reliability, and can be applied to the field of airtight and pressure-resistant tests of other product medium systems.
Drawings
FIG. 1 is a schematic diagram of a related art test embodiment without an exhaust;
FIG. 2 is a schematic diagram of an exhaust testing apparatus and system according to the present application;
FIG. 3 is a schematic diagram of an optimized structure of the exhaust test device and system shown in FIG. 2;
FIG. 4 is a schematic view of the automatic exhaust assembly shown in FIG. 3;
FIG. 5 is a schematic diagram of an embodiment of the vent testing apparatus and system shown in FIG. 3.
Detailed Description
The present application is further described with reference to the following figures and examples:
in the related art, the fuel valve was tested using the structure shown in fig. 1: the inlet end of the fuel valve 103 is provided with a front end interface 101 and a first sealing gasket 102, and the outlet end of the fuel valve 3 is provided with a rear end interface 104 and a second sealing gasket 105 which are fixedly connected by screws. Fuel enters the front end interface 101 from a fuel inlet, and the front end interface 101 is free of an air evacuation device, so that the inner cavity of the front end interface 101 is filled with pressurized entering fuel and compressed residual air, the fuel valve 103 is actually subjected to pressure generated by a mixture of air and fuel instead of pressure generated by pure fuel, and great deviation exists between the pressure and the design and test requirements. The rear interface 104 may be vented to the atmosphere rather than fuel during the air-tight test, resulting in erroneous test results.
As shown in fig. 2, the present application provides an exhaust gas test apparatus including: a rear end interface 1, a first gasket 2, a second gasket 4, a front end interface 5 and an automatic exhaust assembly 7.
The outlet end of the front-end interface 5 is provided with a second sealing gasket 4, the side surface of the front-end interface 5 is provided with an automatic exhaust assembly 7, an exhaust port of the automatic exhaust assembly 7 is communicated with the inner cavity of the front-end interface 5, the automatic exhaust assembly 7 is in sealing connection with the front-end interface 5, and one end of the rear-end interface 1 is provided with a first sealing gasket 2;
the rear end interface 1 is provided with one end of a first sealing gasket 2 and is in sealing connection with the outlet end of the fuel valve, and the front end interface 5 is provided with the outlet end of a second sealing gasket 4 and is in sealing connection with the inlet end of the fuel valve.
As shown in fig. 3, the present application also provides an exhaust gas testing apparatus, including: the rear end interface 1, the first sealing gasket 2, the second sealing gasket 4, the front end interface 5 and the automatic exhaust assembly 7;
the outlet end of the front-end interface 5 is provided with a second sealing gasket 4, the side surface of the front-end interface 5 is provided with an automatic exhaust assembly 7, an exhaust port of the automatic exhaust assembly 7 is communicated with the inner cavity of the front-end interface 5, the automatic exhaust assembly 7 is in sealing connection with the front-end interface 5, and one end of the rear-end interface 1 is provided with a first sealing gasket 2; the front end interface 5 and the rear end interface 1 are used for clamping and fixing the fuel valve and providing an inner cavity meeting the test requirements, before the fuel valve is tested, the inner cavity starts to be filled with fuel, and air in the inner cavity is automatically discharged from the automatic exhaust device, so that the test inner cavity is filled with the fuel.
The rear end interface 1 is provided with one end of a first sealing gasket 2 and is in sealing connection with the outlet end of the fuel valve, and the front end interface 5 is provided with the outlet end of a second sealing gasket 4 and is in sealing connection with the inlet end of the fuel valve. For sealing between the rear end interface 1 and the fuel valve outlet and between the front end interface 5 and the fuel valve inlet.
The exhaust test device also comprises a signal transmission assembly, and the signal transmission assembly is in wired connection with the test bed;
the signal transmission assembly is arranged at an exhaust port of the automatic exhaust assembly 7 and used for transmitting an exhaust signal to the test bed, and the exhaust signal is used for indicating that gas in the inner cavity of the front-end interface 5 is exhausted.
The signal transmission assembly comprises a signaler 8 and a clamp spring 9, the signaler 8 is in wired connection with the test bed, and a hole groove is formed in the side face of the front-end interface 5;
the annunciator 8 is fixedly connected with the automatic exhaust assembly 7 through a clamp spring 9, is arranged in a hole groove of the front end interface 5 in a built-in mode, and is connected with the automatic exhaust assembly 7 in a sealing mode through an O-shaped ring; utilize jump ring structure both convenient maintenance can effectual chucking annunciator 8 again, prevent that annunciator 8 from deviating from automatic exhaust subassembly 7.
The annunciator 8 is provided with a microswitch and is used for being opened under the action of the gas exhaust force of the inner cavity of the front end interface 5 and triggering the annunciator 8 to transmit an exhaust signal to the test bed. The annunciator 8 is matched with the automatic exhaust component 7 for use, and after the air in the inner cavity is exhausted, the annunciator 8 is used for sending a signal to prompt that the air is exhausted and can continue to perform subsequent tests according to test requirements.
As shown in fig. 4, the automatic exhaust assembly 7 includes a floating ball 11 and a thimble 10;
the floating ball 11 floats on the liquid surface by utilizing buoyancy, the position of the floating ball in the channel also synchronously rises along with the rise of the liquid level, after the air in the inner cavity of the front end interface 5 is exhausted, the floating ball 11 is tightly pressed on an exhaust outlet of the automatic exhaust component 7 under the action of the liquid pressure in the cavity, so that the automatic exhaust component 7 is completely sealed, and meanwhile, the thimble 10 is pushed to open the microswitch. After the automatic exhaust is finished, the microswitch is triggered, so that the function of automatic exhaust can be realized, and a signal can be sent to prompt that the air in the inner cavity is exhausted.
Wherein, the automatic exhaust component 7 is hermetically connected with the front end interface 5 by adopting an O-shaped ring 6. The O-shaped ring 6 can be made of nitrile rubber, cloth-sandwiched rubber, polyformaldehyde, polytetrafluoroethylene, nylon and other materials. The sealing performance of the automatic exhaust component 7 and the front end interface 5 can be effectively ensured while the installation is convenient.
The first sealing gasket 2 and the second sealing gasket 4 can be made of nitrile rubber, cloth-sandwiched rubber, polyformaldehyde, polytetrafluoroethylene, nylon and other materials. The direct contact between the front end interface 5 and the rear end interface 1 with the fuel valve is avoided, the sealing requirement can be met, and the fuel valve can be protected from being crushed.
Wherein, the rear end interface 1 and the front end interface 5 are made of stainless steel. And a stable and reliable inner cavity is formed between the fuel oil valve and the fuel oil valve, so that the reliability of the structure of the exhaust test device is improved.
The application provides an exhaust test system, includes: a vent test device and a fuel valve, the vent test device comprises the vent test device shown in figure 2 or figure 3.
As shown in fig. 5, one end of the rear end interface of the exhaust testing device, which is provided with the first sealing gasket, is in sealing connection with the outlet end of the fuel valve, and the outlet end of the front end interface, which is provided with the second sealing gasket, is in sealing connection with the inlet end of the fuel valve.
Referring to fig. 5, the operation process of the exhaust test apparatus provided by the present application includes: the inlet end of the fuel valve 3 is provided with a front end interface 5 and a second sealing gasket, and the outlet end of the fuel valve 3 is provided with a rear end interface and a first sealing gasket which are fixedly connected by screws. After fuel enters the inner cavity of the front end interface 5 from a fuel inlet, the inner cavity is gradually filled with the fuel, a floating ball 11 in the automatic exhaust assembly floats on the liquid surface by utilizing buoyancy, the position of the floating ball 11 in a channel also synchronously rises along with the rise of the liquid level, after the air in the inner cavity of the front end interface 5 is emptied, the floating ball 11 is tightly pressed at an exhaust outlet under the action of the liquid pressure in the cavity, the automatic exhaust assembly is completely sealed, meanwhile, a thimble 10 is pushed to open a microswitch in an annunciator 8, the annunciator 8 sends out an electric signal after being opened, the air in the inner cavity of the front end interface 5 is indicated to be emptied, the whole test system meets the design test requirements, and an operator is reminded to continue to carry out specific test operation according to the design requirements.
The application provides that the exhaust test device is installed in an exhaust test system, in the test process, fuel enters a front-end interface inner cavity from a fuel inlet, and air in the front-end interface inner cavity is automatically exhausted through an automatic exhaust assembly in the exhaust test device along with the gradual increase of the fuel; when the air is exhausted, the annunciator automatically outputs signals to display that the air in the inner cavity of the front-end interface is in an exhausted state, so that the air tightness test time of fuel products can be saved, and the accuracy of measured data is improved. The exhaust test device and the exhaust test system integrate structures such as a front end interface, a fuel valve, an automatic exhaust assembly, a annunciator, a rear end interface and a bolt, the whole test device is connected by the bolt, and the exhaust test device has the characteristics of compact structure, high strength and high reliability, and can be applied to the field of airtight and pressure-resistant tests of other product medium systems.
The foregoing examples are given for the purpose of illustration only and are not to be construed as limiting the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description.
Claims (8)
1. An exhaust gas testing apparatus, comprising: a rear end interface (1), a first sealing gasket (2), a second sealing gasket (4), a front end interface (5) and an automatic exhaust component (7),
the outlet end of the front-end interface (5) is provided with a second sealing gasket (4), the side surface of the front-end interface (5) is provided with an automatic exhaust assembly (7), an exhaust port of the automatic exhaust assembly (7) is communicated with the inner cavity of the front-end interface (5), the automatic exhaust assembly (7) is in sealing connection with the front-end interface (5), and one end of the rear-end interface (1) is provided with a first sealing gasket (2);
the rear end interface (1) is provided with one end of a first sealing gasket (2) and is in sealing connection with the outlet end of the fuel valve, and the front end interface (5) is provided with the outlet end of a second sealing gasket (4) and is in sealing connection with the inlet end of the fuel valve.
2. The exhaust testing apparatus of claim 1, further comprising a signal transmission assembly, the signal transmission assembly being in wired connection with the test stand,
the signal transmission assembly is arranged at an exhaust port of the automatic exhaust assembly (7) and used for transmitting an exhaust signal to the test bed, and the exhaust signal is used for indicating that gas in an inner cavity of the front-end interface (5) is exhausted.
3. The exhaust test device according to claim 2, wherein the signal transmission assembly comprises an annunciator (8) and a clamp spring (9), the annunciator (8) is in wired connection with the test bed, and a hole groove is formed in the side surface of the front-end interface (5);
the annunciator (8) is fixedly connected with the automatic exhaust assembly (7) through a clamp spring (9) and is arranged in a hole groove of the front end interface (5), and the annunciator (8) is in sealing connection with the automatic exhaust assembly (7) through an O-shaped ring;
the annunciator (8) is provided with a microswitch and is used for being opened under the action of the gas exhaust force of the inner cavity of the front end interface (5) and triggering the annunciator (8) to transmit an exhaust signal to the test bed.
4. The exhaust test device according to claim 3, characterized in that the automatic exhaust assembly (7) comprises a floating ball (11) and a thimble (10);
the floating ball (11) floats on the liquid surface by utilizing buoyancy, the position of the floating ball in the channel also synchronously rises along with the rise of the liquid level, after the air in the inner cavity of the front end interface (5) is emptied, the floating ball (11) is tightly pressed on an exhaust outlet of the automatic exhaust component (7) under the action of the liquid pressure in the cavity, so that the automatic exhaust component (7) is completely sealed, and meanwhile, the thimble (10) is pushed to open the microswitch.
5. The exhaust gas testing apparatus according to claim 1,
the automatic exhaust device (7) is connected with the front end interface (5) in a sealing way by adopting an O-shaped ring (6).
6. The exhaust gas testing apparatus according to claim 1,
the first sealing gasket (2) and the second sealing gasket (4) are made of nitrile rubber materials.
7. The exhaust gas testing apparatus according to claim 1,
the rear end interface (1) and the front end interface (5) are made of stainless steel.
8. An exhaust testing system, comprising: a vent test device and a fuel valve, the vent test device comprising the vent test device of any one of claims 1 to 7,
one end of the rear end interface of the exhaust test device, which is provided with a first sealing gasket, is in sealing connection with the outlet end of the fuel valve, and the outlet end of the front end interface, which is provided with a second sealing gasket, is in sealing connection with the inlet end of the fuel valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111366025.XA CN114112236B (en) | 2021-11-18 | 2021-11-18 | Exhaust test device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111366025.XA CN114112236B (en) | 2021-11-18 | 2021-11-18 | Exhaust test device and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114112236A true CN114112236A (en) | 2022-03-01 |
| CN114112236B CN114112236B (en) | 2023-09-12 |
Family
ID=80397265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111366025.XA Active CN114112236B (en) | 2021-11-18 | 2021-11-18 | Exhaust test device and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114112236B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002277342A (en) * | 2001-03-16 | 2002-09-25 | Yamaha Fine Technologies Co Ltd | Leakage testing device |
| CN1480630A (en) * | 2002-09-02 | 2004-03-10 | 兵 李 | Dual Y typed rotor piston internal combustion engine |
| CN102840071A (en) * | 2012-06-13 | 2012-12-26 | 张银科 | Novel automatic air removal diesel filter |
| CN207195040U (en) * | 2017-08-15 | 2018-04-06 | 中国航空工业集团公司沈阳飞机设计研究所 | Aircraft air fuel oil radiator air inlet and outlet device |
| CN109186889A (en) * | 2018-09-05 | 2019-01-11 | 苏州科爱佳自动化科技有限公司 | A kind of diesel engine automated watch-keeping facility |
| CN109488797A (en) * | 2018-12-31 | 2019-03-19 | 亚普汽车部件股份有限公司 | A kind of new-type oil tank liquid level control exhaust valve |
| CN111189596A (en) * | 2020-03-11 | 2020-05-22 | 郑州赛奥电子股份有限公司 | Gas relay sealing performance testing device and testing method |
-
2021
- 2021-11-18 CN CN202111366025.XA patent/CN114112236B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002277342A (en) * | 2001-03-16 | 2002-09-25 | Yamaha Fine Technologies Co Ltd | Leakage testing device |
| CN1480630A (en) * | 2002-09-02 | 2004-03-10 | 兵 李 | Dual Y typed rotor piston internal combustion engine |
| CN102840071A (en) * | 2012-06-13 | 2012-12-26 | 张银科 | Novel automatic air removal diesel filter |
| CN207195040U (en) * | 2017-08-15 | 2018-04-06 | 中国航空工业集团公司沈阳飞机设计研究所 | Aircraft air fuel oil radiator air inlet and outlet device |
| CN109186889A (en) * | 2018-09-05 | 2019-01-11 | 苏州科爱佳自动化科技有限公司 | A kind of diesel engine automated watch-keeping facility |
| CN109488797A (en) * | 2018-12-31 | 2019-03-19 | 亚普汽车部件股份有限公司 | A kind of new-type oil tank liquid level control exhaust valve |
| CN111189596A (en) * | 2020-03-11 | 2020-05-22 | 郑州赛奥电子股份有限公司 | Gas relay sealing performance testing device and testing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114112236B (en) | 2023-09-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6904944B2 (en) | Fuel filling device and fuel leakage detection method | |
| US5000047A (en) | Pressure sensor | |
| US3787650A (en) | Water detection device for fuel line | |
| CN100585359C (en) | Gas pressure regulator test device | |
| US5307669A (en) | Method for testing a waterproof casing | |
| CN208719497U (en) | A kind of explosion-proof valve for inflating spool, fast aeration detection box leakproofness | |
| CN117606668A (en) | High-precision intelligent pressure transmitter | |
| CN114112236A (en) | Exhaust test device and system | |
| EP0188509A1 (en) | Leakage and defect test apparatus. | |
| CN213902768U (en) | Helium leak detection tool | |
| CN212300763U (en) | Metal bellows leak hunting equipment | |
| CN112038996B (en) | Water retaining sealing device for cable protection pipe and sealing detection method | |
| CN213181916U (en) | Online checking and diagnosing device for gas density relay | |
| CN109085793A (en) | A kind of PLC control system of helium leak check filling recyclable device | |
| CN101839788A (en) | Gas pressure detection sensing device for gas charging cabinet | |
| CN221004026U (en) | Pressure maintaining valve for gas cylinder | |
| CN201210104Y (en) | Test apparatus for gas regulator | |
| CN217484042U (en) | Quick safe pressure relief device | |
| CN205352630U (en) | Airtight and withstand voltage quick detection device of conformal transducer | |
| CN113252247B (en) | Test head and be used for gas tightness detecting system of pipeline | |
| CN212083105U (en) | Safety device for pressure resistance test of gas pipeline | |
| CN214096502U (en) | Tool for detecting air damper sealing performance | |
| CN219013470U (en) | Pressure relief valve and hydrogen supply system | |
| CN212483188U (en) | Device for rapidly testing pressure resistance of all fittings of whole pipeline system | |
| CN218674142U (en) | Airtight testing arrangement of storage tank edge seal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |