CN219736801U

CN219736801U - Valve testing device

Info

Publication number: CN219736801U
Application number: CN202320357026.6U
Authority: CN
Inventors: 彭聪; 王东雨
Original assignee: Weishi Energy Technology Co Ltd
Current assignee: Weishi Energy Technology Co Ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-09-22
Anticipated expiration: 2033-02-28

Abstract

The utility model discloses a valve testing device, which comprises: the device comprises an air supply unit, a sealing unit, an air outlet unit and a detection unit; a sealing chamber is formed inside the sealing unit, so that a sealing environment is provided for a testing process of the valve to be tested through the sealing chamber; the gas supply unit is connected with the gas inlet of the valve to be tested and is used for providing test gases with different pressures for the test process of the valve to be tested; the air outlet unit is connected with the air outlet of the valve to be tested and is used for controlling the air outlet process of the valve to be tested; the detection unit is used for acquiring test data corresponding to the valve to be tested in the test process. The final detection testing efficiency of the valve can be effectively improved, and the manpower and material resources consumed by valve testing are reduced.

Description

Valve testing device

Technical Field

The utility model relates to the technical field of valve testing, in particular to a valve testing device.

Background

The valve is a pipeline accessory for opening and closing a pipeline, controlling the flow direction, adjusting and controlling parameters (temperature, pressure and flow rate) of a conveying medium. In order to ensure safe use of the valves, each valve needs to be tested for various indexes (such as pressure resistance test, internal leakage rate test, opening function test, external leakage rate test, etc.) before the valves leave the factory.

In the related art, when testing the valve, a plurality of tools are mostly needed to be utilized; specifically, in the safety pressure test, the safety pressure test is required to be performed on a safety pressure test bench, and the pressure inside the valve is increased to 1.5 times of rated working pressure by using a booster so as to perform the safety pressure test; when the opening function test is performed, it is necessary to test it using a solenoid valve performance test bench. It can be appreciated that in this way, valve testing consumes a significant amount of human resources and resources; meanwhile, the testing efficiency of the valve is greatly limited, and the mass production of the valve is not facilitated.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, an object of the present utility model is to provide a valve testing device, which can effectively improve the final inspection testing efficiency of the valve and reduce the manpower and material resources consumed by the valve testing.

The embodiment of the utility model provides a valve testing device which comprises an air supply unit, a sealing unit, an air outlet unit and a detection unit; a sealing chamber is formed inside the sealing unit, so that a sealing environment is provided for a testing process of the valve to be tested through the sealing chamber; the gas supply unit is connected with the gas inlet of the valve to be tested and is used for providing test gases with different pressures for the test process of the valve to be tested; the air outlet unit is connected with the air outlet of the valve to be tested and is used for controlling the air outlet process of the valve to be tested; the detection unit is used for acquiring test data corresponding to the valve to be tested in the test process.

According to the valve testing device provided by the embodiment of the utility model, the sealing unit is internally provided with the sealing chamber so as to provide a sealing environment for the testing process of the valve to be tested; the gas supply unit is connected with the gas inlet of the valve to be tested and is used for providing test gases with different pressures for the test process of the valve to be tested; the air outlet unit is connected with the air outlet of the valve to be tested and is used for controlling the air outlet process of the valve to be tested; the detection unit is used for acquiring test data corresponding to the valve to be tested in the test process; therefore, the final detection testing efficiency of the valve is effectively improved, and the manpower and material resources consumed by valve testing are reduced.

In some embodiments, the detection unit includes a test gas leakage detection module, where the test gas leakage detection module is disposed corresponding to the sealed chamber, and the test gas leakage detection module is configured to perform suction detection on the sealed chamber to obtain a leakage rate of the valve to be tested.

In some embodiments, the test gas leak detection module includes a helium mass spectrometer detector interface, a leak detection line, and a helium mass spectrometer leak detection valve; the leak detection pipeline is respectively connected with the helium mass spectrometer interface and the sealing unit, the helium mass spectrometer interface is used for being externally connected with a helium mass spectrometer detector, and the helium mass spectrometer leak detection valve is arranged corresponding to the leak detection pipeline so as to control the opening and closing of the leak detection pipeline through the helium mass spectrometer leak detection valve.

In some embodiments, the valve testing device further includes a purging unit, where the purging unit is disposed corresponding to the sealed chamber, and is configured to purge the sealed chamber when a gas leakage occurs in a testing process of the valve to be tested.

In some embodiments, the purging unit includes a purging inlet line, a purging inlet solenoid valve, a purging outlet line, a purging outlet solenoid valve, and a blower, the purging inlet line connecting the blower and the sealing unit, respectively, to purge the sealed chamber by the blower, the purging outlet line being for exhausting gas output by the blower; the purging inlet electromagnetic valve is arranged corresponding to the purging inlet pipeline so as to control the opening and closing of the purging inlet pipeline through the purging inlet electromagnetic valve; the purging outlet electromagnetic valve is arranged corresponding to the purging outlet pipeline, so that the opening and closing of the purging outlet pipeline can be controlled through the purging outlet electromagnetic valve.

In some embodiments, the detection unit includes a first pressure sensor, a second pressure sensor and a third pressure sensor, the first pressure sensor is installed corresponding to the gas supply unit, the first pressure sensor is used for acquiring gas pressure corresponding to the gas supply unit, the second pressure sensor is installed corresponding to the sealing unit, the second pressure sensor is used for acquiring gas pressure in the sealing chamber, the third pressure sensor is installed corresponding to the gas outlet unit, and the third pressure sensor is used for acquiring gas pressure corresponding to the gas outlet unit.

In some embodiments, the detection unit further comprises a detection pipeline and a precision pressure sensor isolation electromagnetic valve, the third pressure sensor is connected to the air outlet unit through the detection pipeline, and the precision pressure sensor isolation electromagnetic valve is arranged corresponding to the detection pipeline so as to control the opening and closing of the detection pipeline through the precision pressure sensor isolation electromagnetic valve.

In some embodiments, the air supply unit includes a first pressure line including a first air source inlet and a first inlet solenoid valve, a second pressure line including a second air source inlet and a second inlet solenoid valve, and a third pressure line including a third air source inlet and a third inlet solenoid valve.

In some embodiments, the valve to be tested comprises a pressure relief valve and a bottle valve, and the gas cell comprises a pressure relief valve gas cell and a bottle valve gas cell.

In some embodiments, the pressure-reducing valve outlet unit includes a pressure-reducing valve outlet pipe and a pressure-reducing valve outlet solenoid valve, the pressure-reducing valve outlet solenoid valve being disposed in correspondence with the pressure-reducing valve outlet pipe, to control opening and closing of the pressure-reducing valve outlet pipe through the pressure-reducing valve outlet solenoid valve; the bottle valve outlet unit comprises a bottle valve outlet pipeline and a bottle valve outlet electromagnetic valve, and the bottle valve outlet electromagnetic valve is arranged corresponding to the bottle valve outlet pipeline so as to control the opening and closing of the bottle valve outlet pipeline through the bottle valve outlet electromagnetic valve.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic diagram of a valve testing apparatus according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a valve testing apparatus according to another embodiment of the present utility model;

FIG. 3 is a flow chart of a valve test performed by using the valve test device according to the embodiment of the present utility model;

fig. 4 is a graph showing the variation of inlet gas pressure during valve testing by the valve testing apparatus according to the embodiment of the present utility model.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A valve testing apparatus according to an embodiment of the present utility model is described below with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a valve testing device according to an embodiment of the utility model; as shown in fig. 1, the valve testing apparatus includes:

the gas supply unit 10, the sealing unit 20, the gas outlet unit 30, and the detection unit 40.

Wherein a sealing chamber 21 is formed inside the sealing unit 20 to provide a sealing environment for a testing process of the valve to be tested through the sealing chamber 21.

The gas supply unit 10 is connected with the gas inlet of the valve to be tested, and the gas supply unit 10 is used for providing test gases with different pressures for the test process of the valve to be tested.

The air outlet unit 30 is connected with the air outlet of the valve to be tested, and the air outlet unit 30 is used for controlling the air outlet process of the valve to be tested.

The detecting unit 40 is used for acquiring test data corresponding to the valve to be tested in the test process.

In some embodiments, the detecting unit 40 includes a test gas leakage detecting module 41, where the test gas leakage detecting module 41 is disposed corresponding to the sealed chamber 21, and the test gas leakage detecting module 41 is configured to perform suction detection on the sealed chamber to obtain the leakage rate of the valve to be tested.

In some embodiments, test gas leak detection module 41 includes helium mass spectrometer detector interface 411, leak detection line 412, and helium mass spectrometer leak detection valve 413; the leak detection pipeline 412 is respectively connected with the helium mass spectrometer interface 411 and the sealing unit 20, the helium mass spectrometer interface 411 is used for externally connecting with a helium mass spectrometer, and the helium mass spectrometer leak detection valve 413 is arranged corresponding to the leak detection pipeline 412 so as to control the opening and closing of the leak detection pipeline 412 through the helium mass spectrometer leak detection valve 413.

As an example, as shown in fig. 2, the detection unit includes a helium mass spectrometer leak detection valve V8 and a helium mass spectrometer detector interface H; v8 and H are arranged on a helium mass spectrum detection pipeline, the opening and closing of the helium mass spectrum detection pipeline is controlled through V8, and H is used for externally connecting an air inlet end of a helium mass spectrum detector so as to obtain the leakage rate of a valve to be tested by carrying out air extraction detection on a sealed cavity through the helium mass spectrum detector.

In some embodiments, the valve testing device further includes a purging unit 50, where the purging unit 50 is disposed corresponding to the sealed chamber 21, and the purging unit 50 is configured to purge the sealed chamber 21 when a gas leakage occurs during a testing process of the valve to be tested.

In some embodiments, the purge unit 50 includes a purge inlet line 51, a purge inlet solenoid valve 52, a purge outlet line 53, a purge outlet solenoid valve 54, and a fan 55, the purge inlet line 51 connecting the fan 55 and the sealing unit 20, respectively, to purge the sealed chamber 21 by the fan 50, the purge outlet line 53 being for exhausting gas output from the fan 50; the purging inlet solenoid valve 52 is arranged corresponding to the purging inlet pipeline 51 so as to control the opening and closing of the purging inlet pipeline 51 through the purging inlet solenoid valve 52; the purge outlet solenoid valve 54 is provided corresponding to the purge outlet pipe 53 to control the opening and closing of the purge outlet pipe 53 through the purge outlet solenoid valve 54.

As an example, as shown in fig. 2, the purge unit includes a purge inlet solenoid valve V4, a purge outlet solenoid valve V5, and a fan G, V4 disposed on a purge air intake pipe for controlling opening and closing of the purge air intake pipe; v5 is arranged on the purging air outlet pipeline and used for controlling the opening and closing of the purging air outlet pipeline; the fan G is used for sending out a sweeping airflow; in this way, the sealed chamber can be purged by a purge flow with V4, V5, G all open to exclude test gas therein.

In some embodiments, the detecting unit 40 includes a first pressure sensor 42, a second pressure sensor 43, and a third pressure sensor 44, where the first pressure sensor 42 is installed corresponding to the gas supply unit 10, the first pressure sensor 42 is used to obtain a gas pressure corresponding to the gas supply unit 10, the second pressure sensor 43 is installed corresponding to the sealing unit 20, the second pressure sensor 43 is used to obtain a gas pressure in the sealing chamber 21, the third pressure sensor 44 is installed corresponding to the gas outlet unit 30, and the third pressure sensor 44 is used to obtain a gas pressure corresponding to the gas outlet unit 30.

In some embodiments, the detecting unit 40 further includes a detecting pipeline 45 and a precise pressure sensor isolation solenoid valve 46, the third pressure sensor 44 is connected to the air outlet unit 30 through the detecting pipeline 45, and the precise pressure sensor isolation solenoid valve 46 is disposed corresponding to the detecting pipeline 45, so as to control opening and closing of the detecting pipeline 45 through the precise pressure sensor isolation solenoid valve 46.

In some embodiments, the air supply unit 10 includes a first pressure line 11, a second pressure line 12, and a third pressure line 13, the first pressure line 11 including a first air source inlet 111 and a first inlet solenoid valve 112, the second pressure line 12 including a second air source inlet 121 and a second inlet solenoid valve 122, and the third pressure line 13 including a third air source inlet 131 and a third inlet solenoid valve 132.

As an example, as shown in fig. 2, the air supply unit includes a first pressure line, a second pressure line, and a third pressure line, which are in a parallel relationship, wherein the first pressure line includes a first air source inlet A1 and a first inlet solenoid valve V1.1; v1.1 is arranged on the first air source pipeline to control the opening and closing of the first air source pipeline through V1.1; the second pressure pipeline comprises a second air source inlet A2 and a second inlet electromagnetic valve V1.2; v1.2 is arranged on the second air source pipeline to control the opening and closing of the second air source pipeline through V1.2; the third pressure pipeline comprises a third air source inlet A3 and a third inlet electromagnetic valve V1.3, and the V1.3 is arranged on the third air source pipeline so as to control the opening and closing of the third air source pipeline through the V1.3; it should be noted that, A1, A2 and A3 are respectively connected to air sources with different pressures, so that in the testing process, the pressure of the test air provided by the air supply unit can be adjusted by changing the on-off states of V1.1, V1.2 and V1.3. Preferably, A1 is in butt joint with a 105Mpa gas source; a2 is a 87.5Mpa air source; a3 is a 1.5Mpa air source. The gas outlet of the gas supply unit is a test gas inlet B which extends into the sealed chamber and is connected with the valve to be tested through a mechanical interface.

As an example, the first pressure pipeline, the second pressure pipeline and the third pressure pipeline are connected in parallel to a total gas supply pipeline, and the first pressure sensor P1 is arranged corresponding to the total gas supply pipeline so as to acquire the gas pressure corresponding to the gas supply unit through P1; the second pressure sensor P4 is installed corresponding to the sealing unit 20 to acquire the gas pressure of the sealing chamber in the sealing unit 20 through P4; the third pressure sensor P2 is disposed corresponding to the gas outlet pipeline of the gas outlet unit 30 to obtain the gas pressure corresponding to the gas outlet unit; preferably, P2 can be connected to the air outlet line through a precision pressure sensor isolation solenoid valve V6. Therefore, through the combination of the P1, the P4 and the P2, various gas pressure values in the testing process can be effectively obtained, and the internal leakage rate of the valve to be tested is calculated according to the various gas pressure values.

In some embodiments, the valve to be tested comprises a pressure relief valve and a bottle valve, and the gas cell 30 comprises a pressure relief valve gas cell 31 and a bottle valve gas cell 32.

As one example, the valve to be tested includes a pressure relief valve and a bottle valve; as shown in fig. 2, the gas outlet units include a pressure reducing valve gas outlet unit and a bottle valve gas outlet unit; the pressure reducing valve air outlet unit comprises a pressure reducing valve air outlet C, a pressure reducing valve air outlet electromagnetic valve V2 and a medium pressure air outlet D; wherein V2 is arranged on the air outlet pipeline of the pressure reducing valve, so as to control the opening and closing of the air outlet pipeline of the pressure reducing valve through V2; c is connected with an air outlet of the pressure reducing valve through a mechanical interface; the cylinder valve air outlet unit comprises a cylinder valve air outlet E, a cylinder valve air outlet electromagnetic valve V3 and a high-pressure gas outlet F; wherein V3 is arranged on the air outlet pipeline of the bottle valve, so as to control the opening and closing of the air outlet pipeline of the bottle valve through V3; e is connected with the air outlet of the bottle valve through a mechanical interface. It should be noted that, through setting up the different pipelines that relief pressure valve and bottle valve correspond respectively, can conveniently carry out the test to different valves differently. In addition, a corresponding third pressure sensor P3 is arranged corresponding to the bottle valve air outlet pipeline; preferably, P3 is connected to the cylinder valve outlet line by a precision pressure sensor V7.

In some embodiments, the pressure-reducing valve outlet unit 31 includes a pressure-reducing valve outlet pipe 311 and a pressure-reducing valve outlet solenoid valve 312, the pressure-reducing valve outlet solenoid valve 312 being disposed corresponding to the pressure-reducing valve outlet pipe 311 to control opening and closing of the pressure-reducing valve outlet pipe 311 through the pressure-reducing valve outlet solenoid valve 312;

the valve outlet unit 32 includes a valve outlet pipe 321 and a valve outlet solenoid valve 322, and the valve outlet solenoid valve 322 is disposed corresponding to the valve outlet pipe 321, so as to control the opening and closing of the valve outlet pipe 321 through the valve outlet solenoid valve 322.

In addition, in fig. 2, I is a point interface, and a reserved opening (J, K, L) may be further provided on the valve testing device, so that other pipelines may be connected through the reserved opening later.

In summary, according to the valve testing device of the embodiment of the present utility model, the sealing unit is provided with the sealing chamber to provide a sealing environment for the testing process of the valve to be tested; the gas supply unit is connected with the gas inlet of the valve to be tested and is used for providing test gases with different pressures for the test process of the valve to be tested; the air outlet unit is connected with the air outlet of the valve to be tested and is used for controlling the air outlet process of the valve to be tested; the detection unit is used for acquiring test data corresponding to the valve to be tested in the test process; therefore, the final detection testing efficiency of the valve is effectively improved, and the manpower and material resources consumed by valve testing are reduced.

In order to explain the valve testing device according to the present utility model in more detail, as shown in fig. 3, the valve testing device is used for performing the valve testing, which specifically includes the following steps:

s101, acquiring a test start instruction, closing a valve to be tested according to the test start instruction, and controlling the air supply unit to start conveying test air until the detection unit detects that the air pressure corresponding to the air supply unit reaches a first pressure value.

And S102, closing the gas supply unit when the gas pressure corresponding to the gas supply unit reaches a first pressure value, and performing first leakage detection on the valve to be tested through the detection unit.

And S103, controlling the gas supply unit to reduce the test gas pressure so that the gas pressure corresponding to the gas supply unit is a second pressure value, and performing second leakage detection on the valve to be tested through the detection unit.

S104, performing a first switch test on the valve to be tested, controlling the gas supply unit to reduce the test gas pressure after the first switch test is finished, enabling the gas pressure corresponding to the gas supply unit to be a third pressure value, and performing third leakage detection on the valve to be tested through the detection unit.

S105, performing a second switch test on the valve to be tested, and controlling the air outlet unit to discharge test air in the valve testing device after the second switch test is finished.

In some embodiments, the detection unit includes a test gas leak detection module, wherein performing, by the detection unit, a first leak detection of the valve under test includes: after the gas supply unit is closed, timing operation is performed, and when the timing result reaches a first time length threshold value, the sealing chamber of the sealing unit is subjected to air extraction detection through the test gas leakage detection module so as to obtain the leakage rate of the valve to be tested.

In some embodiments, the valve testing apparatus further comprises a purge unit, wherein the control method further comprises: and if the leak rate of the valve to be tested is judged to be the leak rate of the test gas in the sealed chamber, controlling the purging unit to purge the sealed chamber after the second switch test is finished.

In some embodiments, performing a first switching test on a valve under test includes: starting the air supply unit and the air outlet unit, and performing one-time switching operation on the valve to be tested by using the minimum design starting voltage; after the switch operation is finished, closing the air outlet unit, performing timing operation, and detecting the external leakage rate and the internal leakage rate of the valve to be tested through the detection unit when the timing result reaches a second time threshold.

Taking table 1 as an example to describe in detail the use flow of the valve testing device in the testing process, table 1 is the valve control flow (where, v represents open, -represents close) in the bottle valve testing process of the control method of the valve testing device according to the specific embodiment of the present utility model:

TABLE 1

FIG. 4 is a schematic diagram showing the variation of inlet pressure of the air supply unit during the test according to the embodiment of the utility model; as shown in table 1 and fig. 4, the test procedure using the valve test apparatus specifically includes: firstly, in a boosting stage, opening a V1.1 inlet electromagnetic valve of an air supply unit, and closing other valves; the pressure at the inlet, measurable by P1, rises to 105Mpa. Then, the V1.1 inlet solenoid valve was closed, and the V8 helium mass spectrometer leak detection valve was opened to maintain the pressure for 180s, and leak rate detection was performed by a helium mass spectrometer during the pressure maintenance. Then, the V1.2 inlet solenoid valve is opened to perform depressurization, so that the gas pressure is reduced from 105Mpa to 87.5Mpa; then, V7 (bottle valve to be tested closed); after the pressure is maintained for 60 seconds, the internal leakage rate detection and the external leakage rate detection are carried out on the bottle valve to be detected (it can be understood that the external leakage rate detection is carried out through a helium mass spectrometer detector, and the internal leakage rate detection is carried out through calculation through gas pressure values measured by each pressure sensor); then, V3 is opened and the bottle valve is opened once with the minimum design opening voltage (the pressure reducing valve performs the deflation operation once); then, closing V3, opening V7, maintaining the pressure for 60s, and detecting the internal leakage rate and the external leakage rate of the bottle valve to be detected after the pressure is maintained, so as to finish the high-voltage switch test of the bottle valve to be detected; then, closing the V1.2 inlet solenoid valve and the V7, and opening the V1.3 inlet solenoid valve to reduce the gas pressure to 1.5Mpa; then, opening V7, maintaining the pressure for 60s, and detecting the internal leakage rate and the external leakage rate of the bottle valve to be detected after the pressure is maintained; then, V7 is closed, V3 is opened, and the bottle valve is opened once with the minimum design opening voltage (the pressure reducing valve performs the deflation operation once); then, closing V3, opening V7, maintaining the pressure for 60s, and detecting the internal leakage rate and the external leakage rate of the bottle valve to be detected after the pressure is maintained; then, V3 and the bottle valve to be tested are opened to remove the test gas in the valve test device.

Taking table 2 as an example to describe in detail the use flow of the valve testing device in the testing process, table 2 is the valve control flow (where, v represents open, -represents close) in the pressure reducing valve testing process of the control method of the valve testing device according to the specific embodiment of the present utility model:

TABLE 2

As shown in table 2, the test procedure of the pressure reducing valve is substantially identical to the test procedure of the bottle valve, and will not be described in detail herein.

It should be noted that the number of the substrates,

in the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. The valve testing device is characterized by comprising an air supply unit, a sealing unit, an air outlet unit and a detection unit;

a sealing chamber is formed inside the sealing unit, so that a sealing environment is provided for a testing process of the valve to be tested through the sealing chamber;

the gas supply unit is connected with the gas inlet of the valve to be tested and is used for providing test gases with different pressures for the test process of the valve to be tested;

the air outlet unit is connected with the air outlet of the valve to be tested and is used for controlling the air outlet process of the valve to be tested;

the detection unit is used for acquiring test data corresponding to the valve to be tested in the test process.

2. The valve testing device of claim 1, wherein the detection unit comprises a test gas leak detection module disposed in correspondence with the sealed chamber, the test gas leak detection module configured to perform a bleed-off test on the sealed chamber to obtain a leak rate of the valve to be tested.

3. The valve test apparatus of claim 2, wherein the test gas leak detection module comprises a helium mass spectrometer interface, a leak detection line, and a helium mass spectrometer leak detection valve;

the leak detection pipeline is respectively connected with the helium mass spectrometer interface and the sealing unit, the helium mass spectrometer interface is used for being externally connected with a helium mass spectrometer detector, and the helium mass spectrometer leak detection valve is arranged corresponding to the leak detection pipeline so as to control the opening and closing of the leak detection pipeline through the helium mass spectrometer leak detection valve.

4. A valve testing apparatus according to any one of claims 1 to 3, further comprising a purge unit provided in correspondence with the sealed chamber for purging the sealed chamber when a gas leak occurs during the testing of the valve to be tested.

5. The valve testing device of claim 4, wherein the purge unit comprises a purge inlet line, a purge inlet solenoid valve, a purge outlet line, a purge outlet solenoid valve, and a blower, the purge inlet line connecting the blower and the sealing unit, respectively, to purge the sealed chamber by the blower, the purge outlet line for exhausting gas output by the blower;

the purging inlet electromagnetic valve is arranged corresponding to the purging inlet pipeline so as to control the opening and closing of the purging inlet pipeline through the purging inlet electromagnetic valve;

the purging outlet electromagnetic valve is arranged corresponding to the purging outlet pipeline, so that the opening and closing of the purging outlet pipeline can be controlled through the purging outlet electromagnetic valve.

6. The valve testing device according to claim 1, wherein the detecting unit includes a first pressure sensor installed corresponding to the gas supply unit, a second pressure sensor installed corresponding to the sealing unit, and a third pressure sensor installed corresponding to the gas outlet unit, the third pressure sensor being used for acquiring a gas pressure corresponding to the gas outlet unit.

7. The valve testing apparatus of claim 6, wherein the detection unit further comprises a detection line through which the third pressure sensor is connected to the gas outlet unit, and a precision pressure sensor isolation solenoid valve provided in correspondence with the detection line to control opening and closing of the detection line through the precision pressure sensor isolation solenoid valve.

8. The valve testing device of claim 1, wherein the air supply unit comprises a first pressure line comprising a first air source inlet and a first inlet solenoid valve, a second pressure line comprising a second air source inlet and a second inlet solenoid valve, and a third pressure line comprising a third air source inlet and a third inlet solenoid valve.

9. The valve testing apparatus of claim 1, wherein the valve to be tested comprises a pressure relief valve and a bottle valve, and the gas outlet unit comprises a pressure relief valve gas outlet unit and a bottle valve gas outlet unit.

10. The valve testing device according to claim 9, wherein the pressure-reducing valve outlet unit includes a pressure-reducing valve outlet pipe and a pressure-reducing valve outlet solenoid valve, the pressure-reducing valve outlet solenoid valve being disposed in correspondence with the pressure-reducing valve outlet pipe to control opening and closing of the pressure-reducing valve outlet pipe through the pressure-reducing valve outlet solenoid valve;

the bottle valve outlet unit comprises a bottle valve outlet pipeline and a bottle valve outlet electromagnetic valve, and the bottle valve outlet electromagnetic valve is arranged corresponding to the bottle valve outlet pipeline so as to control the opening and closing of the bottle valve outlet pipeline through the bottle valve outlet electromagnetic valve.