Valve detection device

Abstract

The utility model provides a valve detection device. The valve detection device comprises a rack. The detection part comprises a tank body, at least one first detection component, at least one second detection component and a pressure detection component, the tank body is arranged on the rack, the tank body is provided with a pressure cavity, the first detection component and the second detection component are arranged in an openable and closable mode, and one end of the first detection component and one end of the second detection component are communicated with the pressure cavity; the other end of the first detection component is provided with a flange connecting piece, the other end of the second detection component is provided with a screwed joint, the flange connecting piece and the screwed joint are respectively connected with different valves to be detected, and one end of the pressure detection component extends into the pressure chamber; and the pressure input part is communicated with the pressure chamber, and the pressure input part is used for introducing pressure into the pressure chamber. According to the technical scheme of the utility model, the problem that a valve detection device in the prior art is difficult to detect valves with different joints is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve detection technical field, specifically, relate to a valve detection device. BACKGROUND

[0002] Valve plays an important control role in the production process, and the old valve replaced after long time use is generally directly scrapped, which is mainly because the detection of valve is difficult, and the detection by a third party will produce high detection cost and increase production cost on the one hand, and the detection time of the third party detection agency is usually longer.

[0003] In the prior art, the valve detection device can detect different types of valves with the same connector to determine whether the valve leaks, but the existing valve detection device is difficult to detect valves with different connectors. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a valve detection device to solve the problem that the valve detection device in the prior art is difficult to detect valves with different connectors.

[0005] In order to achieve the above purpose, the utility model provides a valve detection device, which comprises a rack, a detection part, at least one first detection component, at least one second detection component and a pressure detection component, the tank body is provided on the rack, the tank body has a pressure chamber, the first detection component and the second detection component are openably and closably arranged, one end of the first detection component and the second detection component is communicated with the pressure chamber, the other end of the first detection component is provided with a flange connector, the other end of the second detection component is provided with a threaded connector, the flange connector and the threaded connector are connected with different valves to be detected respectively, one end of the pressure detection component extends into the pressure chamber, and the pressure detection component is used for detecting the pressure value in the pressure chamber.

[0006] Further, the first detection component comprises a first pipe connector, one end of the first pipe connector is communicated with the pressure chamber; a first valve, one end of the first valve is communicated with the other end of the first pipe connector, and the other end of the first valve is provided with a flange connector.

[0007] Further, the second detection component comprises a second pipe connector, one end of the second pipe connector is communicated with the pressure chamber; a second valve, one end of the second valve is communicated with the other end of the second pipe connector, and the other end of the second valve is provided with a threaded connector.

[0008] Further, the first detection members and the second detection members are provided in plurality, the flange connectors are provided in plurality, the threaded joints are provided in plurality, the plurality of flange connectors are provided in correspondence with the plurality of first detection members, the plurality of threaded joints are provided in correspondence with the plurality of second detection members, the plurality of flange connectors are different in installation size, and the plurality of threaded joints are different in installation size.

[0009] Further, the pressure input part comprises a liquid inlet member for introducing liquid into the pressure chamber, and a pressure input member for introducing pressure medium into the pressure chamber, and the liquid inlet member and the pressure input member are provided in an openable and closable manner.

[0010] Further, the liquid inlet member comprises a first pipeline having a liquid inlet and a liquid outlet, the liquid inlet is used for introducing liquid, and the liquid outlet is communicated with the pressure chamber, and a third valve is arranged on the first pipeline.

[0011] Further, the pressure input member comprises a second pipeline, one end of the second pipeline is used for introducing pressure medium, and the other end of the second pipeline is communicated with the pressure chamber, and a plunger pump is arranged on the second pipeline.

[0012] Further, the valve detection device further comprises a control member arranged on the rack, the control member is electrically connected with the plunger pump, and the control member is electrically connected with the pressure detection member.

[0013] Further, the valve detection device further comprises a safety valve, and a third pipe joint, one end of the third pipe joint is communicated with the pressure chamber, and the other end of the third pipe joint is connected with the safety valve.

[0014] Further, the valve detection device further comprises a third pipeline, one end of the third pipeline is communicated with the pressure chamber, and a fourth valve is communicated with the other end of the third pipeline, and the fourth valve is used for discharging liquid and pressure medium in the pressure chamber.

[0015] Applying the technical solution of this utility model, a valve to be tested is connected to a flange connector, ensuring a good seal between the valve and the flange connector. The first detection component connected to the valve is opened, and the second detection component is closed. Pressure is introduced into the pressure chamber through the pressure input section, and the pressure is gradually increased to reach a preset detection pressure value. This pressure is maintained for a period of time, and the pressure value of the pressure detection component is observed. If the pressure value of the pressure detection component does not drop significantly, it can be preliminarily judged that the sealing performance of the valve is good; conversely, if the pressure value drops significantly, the valve has a leakage problem. Another valve to be tested is connected to a threaded joint, ensuring a good seal between the valve and the threaded joint. The valve is opened... The second detection component connected to the door closes the first detection component. Pressure is introduced into the pressure chamber through the pressure input section and gradually increased to reach the preset detection pressure value. The pressure is maintained at the set detection pressure for a period of time, and the pressure value of the pressure detection component is observed. If the pressure value of the pressure detection component does not drop significantly, it can be preliminarily judged that the sealing performance of the valve under test is good. Conversely, if the pressure value drops significantly, the valve under test has a leakage problem. Compared with the valve detection device in the prior art, which can only detect valves with a single type of connector, in this embodiment, by setting flange connectors and threaded connectors, the flange connectors and threaded connectors can be connected to valves with different connectors respectively, thereby realizing the detection of leakage of valves with different connectors. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of an embodiment of the valve detection device of this utility model is shown;

[0018] Figure 2 It shows Figure 1 Front view of the valve detection device;

[0019] Figure 3 It shows Figure 1 Left view of the valve detection device;

[0020] Figure 4 It shows Figure 1 Right view of the valve detection device.

[0021] The above figures include the following reference numerals:

[0022] 1. Frame; 2. Tank; 3. First pipe joint; 4. Second pipe joint; 5. Third pipe joint; 10. Pressure input unit; 11. Casters; 12. Control unit; 21. Fourth valve; 30. First detection component; 31. First valve; 32. Flange connector; 40. Second detection component; 41. Second valve; 42. Threaded joint; 51. Safety valve; 6. Sixth pipe joint; 61. Pressure relief valve; 7. Pressure detection component; 80. Liquid inlet component; 81. Third valve; 82. First pipeline; 821. Fourth pipe joint; 822. First pipe section; 90. Pressure input component; 91. Piston pump; 92. Second pipeline; 921. Fifth pipe joint; 922. Second pipe section. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] like Figures 1 to 4 As shown, an embodiment of this utility model provides a valve testing device. The valve testing device includes a frame 1; a testing section including a tank 2, at least one first testing component 30, at least one second testing component 40, and a pressure testing component 7. The tank 2 is disposed on the frame 1 and has a pressure chamber. The first testing component 30 and the second testing component 40 are both openable and closable. One end of both the first testing component 30 and the second testing component 40 is connected to the pressure chamber. The other end of the first testing component 30 is provided with a flange connector 32, and the other end of the second testing component 40 is provided with a threaded connector 42. The flange connector 32 and the threaded connector 42 are respectively connected to different valves to be tested. One end of the pressure testing component 7 extends into the pressure chamber and is used to detect the pressure value in the pressure chamber. A pressure input section 10 is connected to the pressure chamber and is used to supply pressure to the pressure chamber.

[0025] In the above technical solution, a valve to be tested is connected to a flange connector 32 to ensure a good seal between the valve and the flange connector 32. The first detection component 30 connected to the valve is opened, and the second detection component 40 is closed. Pressure is introduced into the pressure chamber through the pressure input section 10, and the pressure is gradually increased to reach a preset detection pressure value. The pressure is maintained at the set detection pressure for a period of time, and the pressure value of the pressure detection component 7 is observed. If the pressure value of the pressure detection component 7 does not drop significantly, it can be preliminarily judged that the sealing performance of the valve to be tested is good. Conversely, if the pressure value drops significantly, the valve to be tested has a leakage problem. Another valve to be tested is connected to a threaded joint 42 to ensure a good seal between the valve and the threaded joint 42. The valve to be tested is opened... The second detection component 40 closes the first detection component 30, and pressure is introduced into the pressure chamber through the pressure input section 10, gradually increasing the pressure to reach the preset detection pressure value. The pressure is maintained at the set detection pressure for a period of time, and the pressure value of the pressure detection component 7 is observed. If the pressure value of the pressure detection component 7 does not drop significantly, it can be preliminarily judged that the sealing performance of the valve under test is good. Conversely, if the pressure value drops significantly, the valve under test has a leakage problem. Compared with the valve detection device in the prior art, which can only detect valves with a single joint type, in this embodiment, by setting the flange connector 32 and the threaded connector 42, the flange connector 32 and the threaded connector 42 can be connected to valves with different joint types respectively, thereby realizing the detection of leakage of valves with different joints.

[0026] Specifically, in the embodiments of this utility model, the pressure detection component 7 is a pressure gauge.

[0027] Specifically, in the embodiments of this utility model, the flange connector 32 is a flange joint, and the threaded joint 42 is an internal thread pipe joint. For valves with flange interfaces, the flange connector 32 is used for connection; for valves with external thread interfaces, the threaded joint 42 is used for connection.

[0028] Specifically, in the embodiments of this utility model, the flange connector 32 adopts a universal flange interface, which can be quickly connected to various valves that conform to flange standards, thereby enhancing the flexibility of the valve detection device.

[0029] like Figures 1 to 4 As shown, in an embodiment of the present invention, the first detection component 30 includes a first pipe joint 3, one end of which is connected to the pressure chamber; and a first valve 31, one end of which is connected to the other end of the first pipe joint 3, and the other end of the first valve 31 is provided with a flange connector 32.

[0030] In the above technical solution, after the valve to be tested is connected to the flange connector 32, the first valve 31 is opened. The first valve 31 allows the pressure medium to flow from the pressure chamber through the first pipe joint 3 to the valve to be tested, so as to facilitate the testing of the valve to be tested.

[0031] Specifically, in the embodiments of this utility model, the introduction of the first valve 31 enables the effective cutting off of the fluid passage between the pressure chamber and the outside before connecting the valve to be tested or after the test is completed, preventing accidental pressure leakage during the replacement or testing of the valve to be tested, thereby ensuring the safety of the operator and the sealing of the test environment.

[0032] Specifically, in the embodiments of this utility model, the first valve 31 is a check valve. The specific structure of the check valve can be referred to the prior art, and will not be described in detail here.

[0033] Preferably, in an embodiment of the present invention, the first pipe joint 3 is welded to the tank body 2.

[0034] like Figures 1 to 4 As shown in the embodiment of the present invention, the second detection component 40 includes a second pipe connector 4, one end of which is connected to the pressure chamber; and a second valve 41, one end of which is connected to the other end of the second pipe connector 4, and the other end of the second valve 41 is provided with a threaded connector 42.

[0035] In the above technical solution, after the valve to be tested is connected to the threaded joint 42, the second valve 41 is opened. The opening of the second valve 41 allows the pressure medium to flow from the pressure chamber to the valve to be tested through the second pipe joint 4. The pressure medium is introduced into the pressure chamber through the pressure input part 10 to achieve the preset test pressure. The pressure detection component 7 continuously monitors the pressure change in the pressure chamber. If the pressure value does not drop significantly, it can be preliminarily judged that the sealing performance of the valve to be tested is good.

[0036] Specifically, in the embodiments of this utility model, the second valve 41 is a check valve, and the second pipe joint 4 is welded to the tank body 2.

[0037] like Figures 1 to 4 As shown in the embodiment of this utility model, there are multiple first detection components 30 and multiple second detection components 40, multiple flange connectors 32, and multiple threaded joints 42. The multiple flange connectors 32 are correspondingly arranged with the multiple first detection components 30, and the multiple threaded joints 42 are correspondingly arranged with the multiple second detection components 40. The installation dimensions of the multiple flange connectors 32 are different, and the installation dimensions of the multiple threaded joints 42 are different.

[0038] In the technical scheme, the flange connecting piece 32 with multiple installation sizes and the threaded joint 42 with multiple installation sizes are provided, so that the valve detection device can not only adapt to different joints of the valve to be detected, but also adapt to different sizes of the valve to be detected, thereby expanding the application range of the valve detection device.

[0039] Preferably, in the embodiment of the utility model, the plurality of second detection members 40 are arranged along the axial direction of the tank body 2, and the number of the second detection members 40 is three.

[0040] Preferably, in the embodiment of the utility model, the number of the first detection members 30 is four, three of the four first detection members 30 are arranged along the axial direction of the tank body 2, and the other first detection member 30 of the four first detection members 30 is arranged on the side of the tank body 2 away from the pressure detection member 7.

[0041] It should be noted that, in the embodiment of the utility model, the installation size of the threaded joint 42 refers to the inner diameter of the threaded joint 42, and the installation size of the flange connecting piece 32 refers to the bolt hole center distance of the flange joint, and the bolt hole center distance refers to the diameter of the circle formed by the center points of all the bolt holes on the flange.

[0042] As shown in Figure 1 and Figure 2 , in the embodiment of the utility model, the pressure input part 10 includes a liquid inlet member 80 for introducing liquid into the pressure chamber, and a pressure input member 90 for introducing pressure medium into the pressure chamber, and the liquid inlet member 80 and the pressure input member 90 are both provided in an openable and closable manner.

[0043] In the technical scheme, when the liquid inlet member 80 is opened, liquid flows into the pressure chamber, when the liquid inlet member 80 is closed and the pressure input member 90 is opened, pressure medium flows into the pressure chamber, so that the pressure in the pressure chamber reaches the required pressure value for detection.

[0044] Preferably, in the embodiment of the utility model, the pressure medium can be one of hydraulic oil, water and compressed gas.

[0045] As shown in Figure 1 , Figure 2 and Figure 4 , in the embodiment of the utility model, the liquid inlet member 80 includes a first pipeline 82 having a liquid inlet and a liquid outlet, the liquid inlet is used to introduce liquid, and the liquid outlet is in communication with the pressure chamber; and a third valve 81 is arranged on the first pipeline 82.

[0046] In the technical scheme, when it is needed to introduce liquid into the pressure chamber, the third valve 81 is opened, the liquid inlet is connected with a liquid storage tank, liquid is introduced into the pressure chamber through the first pipeline 82 from the liquid inlet until the pressure chamber is filled with liquid, and then the third valve 81 is closed.

[0047] Preferably, in the embodiment of the utility model, the third valve 81 is a check valve.

[0048] Preferably, in the embodiment of the utility model, the liquid can be water or hydraulic oil.

[0049] Specifically, in the embodiment of the utility model, the first pipeline 82 includes a first pipe section 822 and a fourth pipe joint 821, one end of the first pipe section 822 is communicated with the third valve 81, the other end of the first pipe section 822 is communicated with the liquid storage tank, one end of the fourth pipe joint 821 is communicated with the third valve 81, and the other end of the fourth pipe joint 821 is communicated with the pressure chamber.

[0050] As shown in Figure 1 , Figure 2 and Figure 4 , in the embodiment of the utility model, the pressure input member 90 includes a second pipeline 92, one end of the second pipeline 92 is used for inputting pressure medium, the other end of the second pipeline 92 is communicated with the pressure chamber; and a plunger pump 91 is arranged on the second pipeline 92.

[0051] In the above technical scheme, under the action of the plunger pump 91, the pressure medium flows into the pressure chamber from the second pipeline 92, the pressure in the pressure chamber gradually rises to a preset detection pressure value, the pressure input member 90 is closed, and the pressure value of the pressure detection member 7 is observed to determine whether the valve to be detected has a leakage condition.

[0052] Specifically, in the embodiment of the utility model, the second pipeline 92 includes a second pipe section 922 and a fifth pipe joint 921, the second pipe section 922 is communicated with the plunger pump 91, one end of the fifth pipe joint 921 is communicated with the plunger pump 91, and the other end of the fifth pipe joint 921 is communicated with the pressure chamber.

[0053] In one embodiment, the liquid input member 80 can not be arranged, and compressed gas is directly input into the second pipeline 92 to gradually raise the air pressure in the pressure chamber to a preset detection pressure value.

[0054] As shown in Figures 1 to 4 , in the embodiment of the utility model, the valve detection device further includes a control member 12 arranged on the rack 1, the control member 12 is electrically connected with the plunger pump 91, and the control member 12 is electrically connected with the pressure detection member 7.

[0055] In the technical scheme, the control member 12 sends a starting signal to the plunger pump 91, the plunger pump 91 starts, and the pressure medium is pumped into the pressure chamber from the second pipeline 92; since the control member 12 is electrically connected with the pressure detection member 7, when the pressure value fed back by the pressure detection member 7 reaches a preset detection pressure value, the control member 12 sends a stopping signal to the plunger pump 91, and the plunger pump 91 is closed.

[0056] Specifically, in the embodiment of the utility model, the control member 12 is a controller.

[0057] As shown in Figures 1 to 4 In the embodiment of the utility model, the valve detection device further includes a safety valve 51; a third pipe joint 5, one end of the third pipe joint 5 is communicated with the pressure chamber, and the other end of the third pipe joint 5 is connected with the safety valve 51.

[0058] In the technical scheme, the safety valve 51 can be automatically opened when the pressure in the pressure chamber exceeds a preset safety threshold, and the excessive pressure medium is released to reduce the pressure, which effectively avoids the safety risks such as damage, leakage or explosion of the valve detection device caused by excessively high pressure during operation.

[0059] As shown in Figure 2 and Figure 3 In the embodiment of the utility model, the valve detection device further includes a third pipeline, one end of the third pipeline is communicated with the pressure chamber; a fourth valve 21, the fourth valve 21 is communicated with the other end of the third pipeline, and the fourth valve 21 is used for discharging the liquid and the pressure medium in the pressure chamber.

[0060] In the technical scheme, through the combination of the third pipeline and the fourth valve 21, the valve detection device can quickly discharge the liquid and the pressure medium in the pressure chamber after the test is completed, so that not only the detection efficiency can be improved, but also the plugging problem caused by the residual pressure medium and liquid in the pressure chamber can be reduced, thereby improving the service life of the valve detection device.

[0061] Specifically, in the embodiment of the utility model, the fourth valve 21 is an emptying valve.

[0062] Specifically, in the embodiment of the utility model, the valve detection device further includes a plurality of moving wheels 11, and the plurality of moving wheels 11 are fixedly installed on the rack 1, and the moving wheels 11 are used for assisting the valve detection device to move.

[0063] Specifically, in the embodiment of the utility model, the valve detection device further includes a pressure relief valve 61 and a sixth pipe joint 6, one end of the sixth pipe joint 6 is communicated with the pressure chamber, and the other end of the sixth pipe joint 6 is connected with the pressure relief valve 61, and by arranging the pressure relief valve 61, the pressure in the pressure chamber can be reduced after each detection is completed by manually opening the pressure relief valve 61.

[0064] Specifically, in the embodiment of the utility model, the valve detection device has the advantages that the first detection member 30 and the second detection member 40 are arranged, one end of the first detection member 30 is provided with a flange connector 32, and one end of the second detection member 40 is provided with a threaded joint 42, so that different types of valves can be installed and detected, and the function of one machine with multiple uses is realized. The utility model obtains the data of the internal pressure of the tank body 2 through the pressure detection member 7, controls the internal pressure of the tank body 2 through the plunger pump 91, realizes the automatic pressure holding detection of the valve, has the advantages of simple structure, easy operation and flexible movement, and can effectively solve the problem of difficult valve detection.

[0065] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects: a valve to be detected is connected with the flange connector, the sealing between the valve to be detected and the flange connector is ensured, the first detection member connected with the valve to be detected is opened, the second detection member is closed, pressure is introduced into the pressure chamber through the pressure input part, and the pressure is gradually increased to reach the preset detection pressure value. A period of time is maintained at the set detection pressure, and the pressure value of the pressure detection member is observed. If the pressure value of the pressure detection member does not decrease significantly, it can be preliminarily judged that the sealing performance of the valve to be detected is good, otherwise, if the pressure value decreases significantly, the valve to be detected has a leakage problem. Another valve to be detected is connected with the threaded joint, the sealing between the valve to be detected and the threaded joint is ensured, the second detection member connected with the valve to be detected is opened, the first detection member is closed, pressure is introduced into the pressure chamber through the pressure input part, and the pressure is gradually increased to reach the preset detection pressure value. A period of time is maintained at the set detection pressure, and the pressure value of the pressure detection member is observed. If the pressure value of the pressure detection member does not decrease significantly, it can be preliminarily judged that the sealing performance of the valve to be detected is good, otherwise, if the pressure value decreases significantly, the valve to be detected has a leakage problem. Compared with the valve detection device in the prior art which can only detect valves with a single joint, in the embodiment, the flange connector and the threaded joint can be connected with valves of different joint types respectively, so that the leakage of valves with different joints can be detected.

[0066] The above only describes the preferred embodiments of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A valve testing device, characterized by, The utility model relates to a detection device for valve, including: Frame (1); Detection part, including jar body (2), at least one first detection component (30), at least one second detection component (40) and pressure detection component (7), the jar body (2) is arranged in the frame (1), the jar body (2) has pressure chamber, the first detection component (30) and the second detection component (40) can be open and closed arrangement, one end of the first detection component (30) and the second detection component (40) all communicate with the pressure chamber, the other end of the first detection component (30) is equipped with flange connecting piece (32), the other end of the second detection component (40) is equipped with threaded joint (42), the flange connecting piece (32) and threaded joint (42) are connected with different valve to be detected respectively, one end of pressure detection component (7) extends into the pressure chamber, and pressure detection component (7) is used for detecting the pressure value in the pressure chamber; Pressure input part (10) is communicated with the pressure chamber, and the pressure input part (10) is used to import pressure into the pressure chamber.

2. The valve testing apparatus of claim 1, wherein The first detection component (30) includes: First pipe joint (3), one end of the first pipe joint (3) is communicated with the pressure chamber; First valve (31), one end of the first valve (31) is communicated with the other end of the first pipe joint (3), and the other end of the first valve (31) is equipped with the flange connecting piece (32).

3. The valve testing apparatus of claim 1, wherein, The second detection component (40) includes: Second pipe joint (4), one end of the second pipe joint (4) is communicated with the pressure chamber; Second valve (41), one end of the second valve (41) is communicated with the other end of the second pipe joint (4), and the other end of the second valve (41) is equipped with the threaded joint (42).

4. The valve testing apparatus of any one of claims 1 to 3, wherein, The first detection component (30) and the second detection component (40) are arranged as multiple, the flange connecting piece (32) is multiple, the threaded joint (42) is multiple, multiple flange connecting pieces (32) are correspondingly arranged with multiple first detection components (30), multiple threaded joints (42) are correspondingly arranged with multiple second detection components (40), the installation size of multiple flange connecting pieces (32) is different, and the installation size of multiple threaded joints (42) is different.

5. The valve testing apparatus of any one of claims 1 to 3, wherein, The pressure input part (10) includes: Liquid inlet component (80) is used to import liquid into the pressure chamber; Pressure input component (90) is used to import pressure medium into the pressure chamber, and the liquid inlet component (80) and the pressure input component (90) are open and closed arrangement.

6. The valve testing apparatus of claim 5, wherein, The liquid inlet component (80) includes: First pipeline (82) has liquid inlet and liquid outlet, the liquid inlet is used to import liquid, and the liquid outlet is communicated with the pressure chamber; Third valve (81) is arranged on the first pipeline (82).

7. The valve testing apparatus of claim 5, wherein, The pressure input component (90) includes: A second pipe (92) having one end for communicating with a pressure medium and the other end communicating with the pressure chamber; A plunger pump (91) arranged on the second pipe (92).

8. The valve testing apparatus of claim 7, wherein, The valve detection device further comprises a control member (12) arranged on the frame (1), the control member (12) being electrically connected with the plunger pump (91) and the pressure detection member (7).

9. The valve testing apparatus of any one of claims 1 to 3, wherein, The valve detection device further comprises: A safety valve (51); A third pipe joint (5) having one end communicating with the pressure chamber and the other end connected with the safety valve (51).

10. The valve testing apparatus of any one of claims 1 to 3, wherein, The valve detection device further comprises: A third pipe having one end communicating with the pressure chamber; A fourth valve (21) communicating with the other end of the third pipe, the fourth valve (21) being used for discharging the liquid and pressure medium in the pressure chamber.

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