Valve leakage test device

Abstract

The utility model belongs to the technical field of valve test equipment, and particularly relates to a valve leakage test device which comprises a rack, two sealing plates, a liquid inlet pipe, a liquid outlet pipe, a first pressure measuring instrument, a liquid storage tank, a pressurizing mechanism and a second pressure measuring instrument. Two sealing plates are arranged on the rack, the two sealing plates are in sealing connection with a medium inlet and a medium outlet of the valve respectively, a liquid inlet pipe communicated with the medium inlet is arranged on one sealing plate, a liquid outlet pipe communicated with the medium outlet is arranged on the other sealing plate, and a first pressure measuring instrument is arranged on the liquid outlet pipe; a pressurizing chamber is arranged in the liquid storage tank; the pressurizing mechanism comprises an adjusting rod capable of partially entering the pressurizing chamber and an adjusting piece capable of increasing or decreasing the volume of the adjusting rod entering the pressurizing chamber; the second pressure measuring instrument can monitor the pressure of the liquid in the pressurizing chamber; compared with the prior art, when the test device is used for carrying out a leakage test on the valve, the test pressure can be adjusted in a sectional mode, and the sealing performance of the valve can be better evaluated.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve test equipment, and particularly relates to a valve leakage test device. Background Art

[0002] A valve is a device used to control the flow of fluids (liquids, gases, steam, etc.), and adjusts the flow rate, pressure, and flow direction of the fluid by opening, closing, or partially closing.

[0003] If a valve leaks during application, it may cause major accidents. Therefore, after the valve is processed, it is necessary to conduct a leakage test on the valve. For some special application sites, it is also necessary to periodically conduct a leakage test on the valve. Traditional valve detection methods generally only test the valve at the rated pressure. When encountering special situations, such as when the flow rate of the medium in the valve increases sharply, the pressure on the valve will gradually increase. At this time, the sealing performance of the valve cannot be accurately evaluated only through the rated pressure test. Therefore, it is necessary to improve the existing valve leakage test method. Content of the Utility Model

[0004] The purpose of the utility model is to provide a valve leakage test device for the above-mentioned existing technical problems. When this test device conducts a leakage test on a valve, it can adjust the test pressure in a segmented manner, and can better evaluate the sealing performance of the valve.

[0005] In view of this, the utility model provides a valve leakage test device, including:

[0006] A frame, on which two sealing plates are arranged. The two sealing plates are respectively sealed and connected to the medium inlet and the medium outlet of the valve. A liquid inlet pipe communicating with the medium inlet is arranged on one sealing plate, and a liquid outlet pipe communicating with the medium outlet is arranged on the other sealing plate. A first pressure gauge is arranged on the liquid outlet pipe, and the first pressure gauge can monitor the pressure of the liquid in the liquid outlet pipe;

[0007] A liquid storage tank, in which there is a pressurizing chamber, and the pressurizing chamber can store liquid. The end of the liquid outlet pipe far from the sealing plate is communicated with the pressurizing chamber;

[0008] A pressurizing mechanism, which includes an adjusting rod that can partially enter the pressurizing chamber, and an adjusting member that can increase or decrease the volume of the adjusting rod entering the pressurizing chamber;

[0009] A second pressure gauge, which can monitor the pressure of the liquid in the pressurizing chamber;

[0010] Wherein, when the volume of the adjusting rod entering the pressurizing chamber increases, the pressure of the liquid in the pressurizing chamber increases.

[0011] In this technical solution, initially, the volume of the adjusting rod entering the pressurizing chamber is the smallest, and the pressure of the liquid in the pressurizing chamber is the lowest. With the valve in the closed state, the medium inlet and medium outlet of the valve are sealed by two sealing plates, and the valve is fixed on the frame. Then, the volume of the adjusting rod entering the pressurizing chamber is increased through the adjusting member, so that the pressure in the pressurizing chamber increases, and the liquid in the pressurizing chamber is pressed into the valve. Observe the first pressure gauge to determine whether the valve leaks. Then continue to increase the volume of the adjusting rod entering the pressurizing chamber through the adjusting member to pressurize the liquid in the pressurizing chamber and the valve, and observe the second pressure gauge in real time to understand the pressure of the liquid in the current pressurizing chamber. After the pressure increases by a certain value, maintain it for a period of time, and observe the first pressure gauge to determine whether the valve leaks. After that, the volume of the adjusting rod entering the pressurizing chamber can continue to be increased through the adjusting member to pressurize the liquid in the pressurizing chamber and the valve. After the pressure increases by a certain value, maintain it for a period of time, and observe the first pressure gauge to determine whether the valve leaks. In this way, the valve is leak-tested by means of multi-stage pressurization testing.

[0012] In the above technical solution, further, a first control valve is provided on the liquid outlet pipe and on the side of the first pressure gauge away from the sealing plate.

[0013] In the above technical solution, further, a liquid replenishing pipe is connected to the liquid storage tank. One end of the liquid replenishing pipe is communicated with the pressurizing chamber, the other end of the liquid replenishing pipe is connected with a liquid supply device, and a liquid replenishing valve is provided on the liquid replenishing pipe.

[0014] In the above technical solution, further, a second control valve is provided on the liquid inlet pipe.

[0015] In the above technical solution, further, the adjusting member includes:

[0016] A cylinder body, which is connected to the liquid storage tank. The inside of the cylinder body has a piston that can approach and move away from the liquid storage tank. One end of the adjusting rod is connected to the piston;

[0017] Two air supply pipes, which are respectively arranged at both ends of the cylinder body and are both communicated with the inside of the cylinder body. Both air supply pipes are connected to an air supply device, and the two air supply pipes drive the piston to move inside the cylinder body by selectively supplying air into the cylinder body.

[0018] In the above technical solution, further, a first switching valve is provided between the two air supply pipes and the air supply device. The first switching valve can selectively connect the air supply device to the two air supply pipes and can switch the connection.

[0019] In the above technical solution, further, a third air supply pipe is connected to the liquid storage tank. One end of the third air supply pipe is communicated with the pressurizing chamber, the other end of the third air supply pipe is connected with an air supply device, and a third control valve is provided on the third air supply pipe.

[0020] In the above technical solution, further, a connecting pipe is connected to the inlet end of the first switching valve, and a second switching valve is connected between the connecting pipe and the third gas supply pipe. The second switching valve can selectively connect the gas supply device to the connecting pipe and the third gas supply pipe and can switch the connection.

[0021] In the above technical solution, further, a baffle is provided on the frame at a position opposite to the position of the liquid outlet pipe, and the baffle is close to the liquid outlet end of the liquid outlet pipe.

[0022] The beneficial effects of the present utility model are as follows:

[0023] 1. The two ports of the valve are sealed and fixed on the frame by two sealing plates. By introducing the liquid in the pressurized chamber in the liquid storage tank into the closed valve, and monitoring whether there is liquid leakage in the liquid outlet pipe through the first pressure gauge, it can be judged whether the valve leaks. And through the cooperation of the pressurizing mechanism and the second pressure gauge, multi-stage pressurization test is carried out on the liquid in the valve, so as to more accurately evaluate the sealing performance of the valve.

[0024] 2. By connecting a liquid replenishing pipe to the liquid storage tank to enable the liquid supply device to replenish liquid into the pressurized chamber, and controlling the conduction and cutoff of the liquid replenishing pipe through a liquid replenishing valve, the required liquid can be replenished into the pressurized chamber at the beginning of each test, which is convenient for replenishing the liquid in the pressurized chamber.

[0025] 3. By connecting a third gas supply pipe to the liquid storage tank, a third gas supply valve is provided on the third gas supply pipe, and the pressurized chamber is connected to the gas supply device through the third gas supply pipe. After the valve leakage test is completed, the third gas supply valve is opened, and the gas supply device fills the pressurized chamber with gas through the third gas supply pipe. The gas enters the valve through the liquid inlet pipe and squeezes the liquid in the valve out of the liquid outlet pipe, realizing the rapid removal of the test liquid in the valve.

[0026] 4. By providing a baffle on the frame, and the baffle is close to the liquid outlet end of the liquid outlet pipe. In this way, if the valve leaks during the pressure maintaining process or during the pressurization process, the high-pressure liquid ejected from the liquid outlet pipe can be blocked by the baffle, avoiding the harm caused by the ejection of the high-pressure liquid to the operator or other objects. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic diagram of the liquid in the pressurized chamber of the present utility model in a low-pressure state.

[0029] Figure 2 Schematic diagram of the liquid in the pressurization chamber being in a high-pressure state in the present utility model.

[0030] Figure 3 Schematic diagram after the liquid in the pressurization chamber of the present utility model is discharged.

[0031] Figure 4 First-direction schematic diagram of a setting manner of the frame, two sealing plates, liquid storage tank, cylinder body, and baffle in the present utility model.

[0032] Figure 5 Second-direction schematic diagram of a setting manner of the frame, two sealing plates, liquid storage tank, cylinder body, and baffle in the present utility model.

[0033] The markings in the figure are represented as:

[0034] 1. Frame; 2. Sealing plate; 3. Liquid inlet pipe; 301. Second control valve; 4. Liquid outlet pipe; 5. First pressure gauge; 6. Liquid storage tank; 7. Pressurization chamber; 8. Adjusting rod; 9. Second pressure gauge; 10. First control valve; 11. Liquid replenishing pipe; 12. Liquid supply device; 13. Liquid replenishing valve; 14. Cylinder body; 15. Piston; 16. First gas supply pipe; 17. Second gas supply pipe; 18. Gas supply device; 19. First switching valve; 20. Third gas supply pipe; 21. Third control valve; 22. Connecting pipe; 23. Second switching valve; 24. Baffle; F. Valve. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0036] In the description of the present utility model, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. For the sake of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0037] The valve F to be tested in the present utility model is a valve F sold on the market. The valve F includes an inner cavity, a medium inlet and a medium outlet located at both ends of the valve F and communicating with the inner cavity, and a closing member for opening or closing the valve F by conducting or truncating the inner cavity.

[0038] Embodiment 1

[0039] This embodiment provides a valve leakage test device, including: a frame 1, two sealing plates 2, a liquid inlet pipe 3, a liquid outlet pipe 4, a first pressure gauge 5, a liquid storage tank 6, a pressurizing mechanism, and a second pressure gauge 9;

[0040] Two sealing plates 2 are provided on the frame 1. Please refer to Figure 4 Or Figure 5 , the two sealing plates 2 are spaced apart on the frame 1. The outer shape of the sealing plate 2 is adapted to the flange structure of the two ports of the valve F. The sealing plate 2 is connected to the flange of the valve F port through fasteners, so as to realize the sealing connection of the two sealing plates 2 with the medium inlet and the medium outlet of the valve F respectively. After the two sealing plates 2 seal the two ports of the valve F, the valve F is fixed on the frame 1;

[0041] Please refer to Figures 1-3 Any one of the drawings. A liquid inlet pipe 3 communicating with the medium inlet is provided on one sealing plate 2, and a liquid outlet pipe 4 communicating with the medium outlet is provided on the other sealing plate 2. The liquid inlet pipe 3 and the liquid outlet pipe 4 can also be supported by the frame 1 (not shown in the support structure diagram). A first pressure gauge 5 is provided on the liquid outlet pipe 4, and the first pressure gauge 5 can monitor the pressure of the liquid in the liquid outlet pipe 4;

[0042] The liquid storage tank 6 has a pressurizing chamber 7, and the pressurizing chamber 7 can store liquid. The end of the liquid outlet pipe 4 away from the sealing plate 2 is communicated with the pressurizing chamber 7. After the valve F is closed and connected by the two sealing plates 2, pressurizing the pressurizing chamber 7 can squeeze the liquid in the pressurizing chamber 7 into the valve F;

[0043] The pressurizing mechanism includes an adjusting rod 8 that can partially enter the pressurizing chamber 7, and an adjusting member that can increase or decrease the volume of the adjusting rod 8 entering the pressurizing chamber 7. When the volume of the adjusting rod 8 entering the pressurizing chamber 7 increases, the pressure of the liquid in the pressurizing chamber 7 increases; when the volume of the adjusting rod 8 entering the pressurizing chamber 7 decreases, the pressure of the liquid in the pressurizing chamber 7 decreases. In this embodiment, one end of the adjusting rod 8 is in sealed sliding connection with the pressurizing chamber 7, and the adjusting member realizes the increase and decrease of the volume of the adjusting rod 8 in the pressurizing chamber 7 by driving the adjusting rod 8 to move axially.

[0044] The second pressure gauge 9 can monitor the pressure of the liquid in the pressurizing chamber 7, and observe the second pressure gauge 9 during the pressurization of the pressurizing chamber 7 to confirm the increased pressure value.

[0045] In this embodiment, both the first pressure gauge 5 and the second pressure gauge 9 can be products sold on the market. After monitoring the pressure of the liquid, the first pressure gauge 5 and the second pressure gauge 9 can display the readings through the instrument for the operator to quickly read.

[0046] In this embodiment, Figure 4 and Figure 5 a layout of the frame 1, two sealing plates 2, a liquid storage tank 6, and a pressurizing mechanism is disclosed. In the figure, these structures are arranged in a straight line. However, in actual layout, the liquid storage tank 6 and the pressurizing mechanism can be arranged on the sides of the two sealing plates 2, such as Figures 1-3 the layout shown, so as to reduce the excessive space occupied by the test device in a certain direction.

[0047] In this embodiment, please refer to Figure 1 , initially, the volume of the adjusting rod 8 entering the pressurizing chamber 7 is the smallest, and the pressure of the liquid in the pressurizing chamber 7 is the smallest. Seal the medium inlet and outlet of the valve F through the two sealing plates 2 with the valve F in the closed state, and fix the valve F on the frame 1. Then please refer to Figure 2 , increase the volume of the adjusting rod 8 entering the pressurizing chamber 7 through the adjusting member to increase the pressure in the pressurizing chamber 7, press the liquid in the pressurizing chamber 7 into the valve F, observe the first pressure gauge 5 to judge whether the valve F leaks, then continue to increase the volume of the adjusting rod 8 entering the pressurizing chamber 7 through the adjusting member to pressurize the liquid in the pressurizing chamber 7 and the valve F, and observe the second pressure gauge 9 in real time to understand the current pressure of the liquid in the pressurizing chamber 7. After the pressure increases by a certain value, maintain it for a period of time, observe the first pressure gauge 5 to judge whether the valve F leaks. After that, continue to increase the volume of the adjusting rod 8 entering the pressurizing chamber 7 through the adjusting member to pressurize the liquid in the pressurizing chamber 7 and the valve F. After the pressure increases by a certain value, maintain it for a period of time, observe the first pressure gauge 5 to judge whether the valve F leaks. In this way, the leakage test of the valve F is carried out by means of multi-stage pressurization test, and the sealing performance of the valve F can be evaluated more accurately.

[0048] Example 2

[0049] On the basis of Example 1, this example also improves the structure on the liquid outlet pipe 4;

[0050] In this example, please refer to Figures 1-3 any one of the drawings. A first control valve 10 is provided on the liquid outlet pipe 4 and on the side of the first pressure gauge 5 away from the sealing plate 2. The first control valve 10 can conduct or cut off the liquid outlet pipe 4;

[0051] During the test of valve F, the liquid outlet pipe 4 can be cut off through the first control valve 10. In this way, if valve F leaks during the pressure holding process or during the pressurization process, the high-pressure liquid will not immediately spray out from the liquid outlet pipe 4, leaving a reaction time for the operator to stop the test.

[0052] Example 3

[0053] On the basis of Example 1, this example also optimizes the structure of the test device;

[0054] In this example, please refer to Figures 1-3 any one of the drawings. A liquid replenishing pipe 11 is connected to the liquid storage tank 6. One end of the liquid replenishing pipe 11 communicates with the pressurization chamber 7, and the other end of the liquid replenishing pipe 11 is connected to a liquid supply device 12. The liquid supply device 12 includes a container capable of holding liquid and a pump capable of pumping the liquid in the container into the liquid replenishing pipe 11. A liquid replenishing valve 13 is provided on the liquid replenishing pipe 11; the liquid replenishing valve 13 can conduct or cut off the liquid replenishing pipe 11;

[0055] In addition, a second control valve 301 is provided on the liquid inlet pipe 3. The second control valve 301 can conduct or cut off the liquid inlet pipe 3;

[0056] After each test, the liquid inlet pipe 3 can be cut off through the second control valve 301. After removing valve F, the liquid inlet pipe 3 is conducted through the second control valve 301, and by increasing the pressure in the pressurization chamber 7, the liquid in the pressurization chamber 7 is discharged through the liquid outlet pipe 4; before each test, first cut off the liquid inlet pipe 3 through the second control valve 301, then conduct the liquid replenishing pipe 11 through the liquid replenishing valve 13. At this time, liquid is introduced into the liquid replenishing pipe 11 through the liquid supply device 12, and the liquid enters the pressurization chamber 7 through the liquid replenishing pipe 11;

[0057] In this example, the liquid in the pressurization chamber 7 can be water. When discharging the liquid in the pressurization chamber 7, a container for collecting the liquid can be placed at the outlet of the liquid outlet pipe 4, or the liquid can be directly discharged onto the ground.

[0058] Example 4

[0059] On the basis of Embodiment 1, this embodiment also discloses a structure of the adjusting member;

[0060] The adjusting member includes: a cylinder block 14, a piston 15, and two air supply pipes;

[0061] Please refer to Figures 1-3 any one of the drawings. The cylinder block 14 is a cylindrical structure with one end open. A detachable sealing structure is provided at the open end of the cylinder block 14. The open end of the cylinder block 14 is connected to the liquid storage tank 6. Inside the cylinder block 14, there is a piston 15 that can approach and move away from the liquid storage tank 6. The piston 15 divides the interior of the cylinder block 14 into two chambers. One end of the adjusting rod 8 away from the pressurizing chamber 7 penetrates through the side wall of the liquid storage tank 6 and the sealing structure at the end of the cylinder block 14 and is connected to the piston 15; a pressure relief port communicating with the inside can be provided on the cylinder block 14, and the pressure relief port can be opened and closed. When the pressure inside the cylinder block 14 suddenly increases accidentally, the pressure inside the cylinder block 14 can be quickly released through the pressure relief port;

[0062] The two air supply pipes are respectively arranged at both ends of the cylinder block 14 and are both communicated with the inside of the cylinder block 14. The two air supply pipes are both connected to the air supply device 18. The two air supply pipes drive the piston 15 to move inside the cylinder block 14 by supplying air to the inside of the cylinder block 14 alternately;

[0063] Specifically, the two air supply pipes are respectively defined as the first air supply pipe 16 and the second air supply pipe 17. One end of the first air supply pipe 16 is communicated with the chamber on the side of the piston 15 away from the pressurizing chamber 7, and one end of the second air supply pipe 17 is communicated with the chamber on the side of the piston 15 close to the pressurizing chamber 7. One end of the first air supply pipe 16 away from the cylinder block 14 and one end of the second air supply pipe 17 away from the cylinder block 14 can be respectively connected to an air supply device 18. The air supply device 18 is a device that can introduce gas into the inside of the cylinder block 14 through the air supply pipe, such as an air compressor sold on the market, etc.;

[0064] In this embodiment, when the air supply device 18 introduces gas into the first air supply pipe 16, the pressure in the chamber on the side of the piston 15 away from the pressurizing chamber 7 is greater than the pressure in the other chamber. At this time, the piston 15 moves towards the direction close to the pressurizing chamber 7. During this process, the piston 15 drives the adjusting rod 8 to move, and the volume of the adjusting rod 8 entering the pressurizing chamber 7 increases; when the air supply device 18 introduces gas into the second air supply pipe 17, the pressure in the chamber on the side of the piston 15 close to the pressurizing chamber 7 is greater than the pressure in the other chamber. At this time, the piston 15 moves towards the direction away from the pressurizing chamber 7. During this process, the piston 15 drives the adjusting rod 8 to move, and the volume of the adjusting rod 8 entering the pressurizing chamber 7 decreases.

[0065] Embodiment 5

[0066] On the basis of Embodiment 4, this embodiment also optimizes the connection between the two air supply pipes and the air supply device 18;

[0067] Please refer toFigures 1-3 In any one of the drawings, a first switching valve 19 is provided between two gas supply pipes and the gas supply device 18. The first switching valve 19 can selectively connect the gas supply device 18 to the two gas supply pipes and can switch the connection.

[0068] The first switching valve 19 can be a two-position three-way valve. One end of the first gas supply pipe 16 away from the cylinder block 14 and one end of the second gas supply pipe 17 away from the cylinder block 14 are respectively connected to two outlet ends of the first switching valve 19. The outlet of the gas supply device 18 is connected to the inlet end of the first switching valve 19 through a pipeline. In this way, the two gas supply pipes can be respectively supplied with gas by one gas supply device 18.

[0069] Figure 1 Shown is a schematic diagram when the first switching valve 19 connects the gas supply device 18 to the second gas supply pipe 17. At this time, the connection between the gas supply device 18 and the first gas supply pipe 16 is cut off. Figure 2 Shown is a schematic diagram when the first switching valve 19 connects the gas supply device 18 to the first gas supply pipe 16. At this time, the connection between the gas supply device 18 and the second gas supply pipe 17 is cut off.

[0070] Embodiment 6

[0071] On the basis of Embodiment 5, the structure of the test device is further optimized in this embodiment.

[0072] Please refer to Figures 1-3 In any one of the drawings, a third gas supply pipe 20 is connected to the liquid storage tank 6. One end of the third gas supply pipe 20 communicates with the pressurization chamber 7. The other end of the third gas supply pipe 20 is connected to a gas supply device 18. A third control valve 21 is provided on the third gas supply pipe 20. The third control valve 21 can conduct or cut off the third gas supply pipe 20.

[0073] During the test, the third control valve 21 cuts off the third gas supply pipe 20. After the test is over, the third control valve 21 conducts the third gas supply pipe 20. At this time, the gas supply device 18 can introduce air into the pressurization chamber 7 through the third gas supply pipe 20, increasing the air pressure in the pressurization chamber 7, so that the liquid in the pressurization chamber 7 sequentially passes through the liquid inlet pipe 3, the valve F, and the liquid outlet pipe 4 and is discharged.

[0074] Embodiment 7

[0075] On the basis of Embodiment 6, the structure of the test device is further optimized in this embodiment.

[0076] Please refer to Figures 1-3 In any one of the drawings, a connecting pipe 22 is connected to the inlet end of the first switching valve 19. A second switching valve 23 is connected between the connecting pipe 22 and the third gas supply pipe 20. The second switching valve 23 can selectively connect the gas supply device 18 to the connecting pipe 22 and the third gas supply pipe 20 and can switch the connection.

[0077] The second switching valve 23 can be a two-position three-way valve. One end of the connecting pipe 22 away from the first switching valve 19 is connected to an outlet end of the second switching valve 23, and one end of the third gas supply pipe 20 away from the liquid storage tank 6 is connected to another outlet end of the second switching valve 23. The output port of the gas supply device 18 is connected to the inlet end of the second switching valve 23 through a pipeline. In this way, a single gas supply device 18 can supply gas to the three gas supply pipes simultaneously, reducing the usage cost.

[0078] Figure 1 and Figure 2 Shown is a schematic diagram when the second switching valve 23 connects the gas supply device 18 to the connecting pipe 22. At this time, the connection between the gas supply device 18 and the third gas supply pipe 20 is cut off, and the piston 15 in the cylinder block 14 can be driven. Figure 3 Shown is a schematic diagram when the second switching valve 23 connects the gas supply device 18 to the third gas supply pipe 20. At this time, the connection between the gas supply device 18 and the connecting pipe 22 is cut off, and gas can be delivered into the pressurizing chamber 7 through the third gas supply pipe 20.

[0079] Embodiment 8

[0080] Based on Embodiment 1, the structure of the frame 1 is further optimized in this embodiment.

[0081] In this embodiment, please refer to Figure 4 and Figure 5 , a baffle 24 is provided at a position on the frame 1 opposite to the position of the liquid outlet pipe 4. The baffle 24 is detachably connected to the frame 1, and the whole baffle 24 or a part thereof close to the liquid outlet pipe 4 can be made of an elastic material. Please refer to Figures 1-3 any one of the attached drawings. The liquid outlet end of the baffle 24 is close to the liquid outlet pipe 4. In this way, if the valve F leaks during the pressure maintaining process or during the pressurizing process, the high-pressure liquid ejected from the liquid outlet pipe 4 can be blocked by the baffle 24, preventing the high-pressure liquid from ejecting and causing harm to the operator or other objects.

[0082] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments in this application can be combined with each other. This application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Those of ordinary skill in the art, under the inspiration of this application and without departing from the purpose of this application and the scope protected by the claims, can also make many forms, all of which fall within the protection scope of this application.

Claims

1. A valve leakage test device, characterized in that: include: A frame (1), wherein two sealing plates (2) are arranged on the frame (1), and the two sealing plates (2) are respectively sealed and connected to the medium inlet and the medium outlet of the valve (F); one of the sealing plates (2) is provided with a liquid inlet pipe (3) connected to the medium inlet, and the other sealing plate (2) is provided with a liquid outlet pipe (4) connected to the medium outlet, and the liquid outlet pipe (4) is provided with a first pressure gauge (5), and the first pressure gauge (5) can monitor the pressure of the liquid in the liquid outlet pipe (4); A liquid storage box (6), wherein the liquid storage box (6) has a pressurizing chamber (7), wherein the pressurizing chamber (7) can store liquid, and an end of the liquid outlet pipe (4) away from the sealing plate (2) is connected to the pressurizing chamber (7); A pressurizing mechanism, the pressurizing mechanism comprising an adjusting rod (8) capable of partially entering the pressurizing chamber (7), and an adjusting member capable of increasing or decreasing the volume of the pressurizing chamber (7) entered by the adjusting rod (8); a second pressure gauge (9), the second pressure gauge (9) being capable of monitoring the pressure of the liquid in the pressurized chamber (7); When the volume of the adjusting rod (8) entering the pressurizing chamber (7) increases, the pressure of the liquid in the pressurizing chamber (7) increases.

2. The valve leakage test device according to claim 1, characterized in that: A first control valve (10) is provided on the liquid outlet pipe (4) and is located on a side of the first pressure measuring instrument (5) away from the sealing plate (2).

3. The valve leakage test device according to claim 1, characterized in that: The liquid storage tank (6) is connected to a liquid infusion tube (11), one end of the liquid infusion tube (11) is in communication with the pressurizing chamber (7), the other end of the liquid infusion tube (11) is connected to a liquid supply device (12), and a liquid infusion valve (13) is provided on the liquid infusion tube (11).

4. The valve leakage test device according to claim 3, characterized in that: The liquid inlet pipe (3) is provided with a second control valve (301).

5. The valve leakage test device according to claim 1, characterized in that: The adjusting member comprises: A cylinder body (14), the cylinder body (14) being connected to the liquid storage tank (6), the cylinder body (14) having a piston (15) inside thereof which can move closer to and farther from the liquid storage tank (6), and one end of the adjusting rod (8) being connected to the piston (15); Two air supply pipes are respectively arranged at two ends of the cylinder body (14) and are both connected to the interior of the cylinder body (14). The two air supply pipes are both connected to an air supply device (18). The two air supply pipes drive the piston (15) to move inside the cylinder body (14) by selectively supplying air to the interior of the cylinder body (14).

6. The valve leakage test device according to claim 5, characterized in that: A first switching valve (19) is provided between the two gas supply pipes and the gas supply device (18), and the first switching valve (19) can selectively connect the gas supply device (18) to one of the two gas supply pipes and can switch the connection.

7. The valve leakage test device according to claim 6, characterized in that: The liquid storage tank (6) is connected to a third air supply pipe (20), one end of the third air supply pipe (20) is in communication with the pressurized chamber (7), the other end of the third air supply pipe (20) is connected to an air supply device (18), and a third control valve (21) is provided on the third air supply pipe (20).

8. The valve leakage test device according to claim 7, characterized in that: The inlet end of the first switching valve (19) is connected to a connecting pipe (22), and a second switching valve (23) is connected between the connecting pipe (22) and the third air supply pipe (20). The second switching valve (23) can selectively connect the air supply device (18) to either the connecting pipe (22) or the third air supply pipe (20), and can switch the connection.

9. The valve leakage test device according to claim 1, characterized in that: A baffle (24) is provided on the frame (1) at a position opposite to the liquid outlet pipe (4), and the baffle (24) is close to the liquid outlet end of the liquid outlet pipe (4).

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