Valve leakage testing device

Abstract

The utility model discloses a valve leakage test device, which relates to the technical field of valve quality detection and comprises a first test pipeline, a liquid input pipeline, a gas input pipeline, a first air compression device, a recovery pipeline, a liquid flow test assembly and a gas flow test assembly. The liquid input pipeline is connected with the first test pipeline in an on-off manner; the gas input pipeline is connected with the first test pipeline in an on-off manner; the first air compression device is used for driving liquid or gas to enter the first experiment pipeline; one end of the recovery pipeline is connected with the first test pipeline in an on-off manner, the other end of the recovery pipeline is communicated with the first container, and a driving pump is arranged on the recovery pipeline; the gas flow testing assembly is used for being connected with the other end of the valve to be tested; on the basis that various media can be measured, it is guaranteed that a single medium is used in the measurement process, and the accuracy of a test result is improved.

Description

Technical Field

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

[0002] Valves play a crucial role in pipeline systems and are the most commonly used components in liquid and gas transmission systems, as well as in equipment and facilities. The quality of valves directly affects production and safety. When product quality supervision and inspection agencies evaluate the quality of valves, shell tests and seal tests are two main assessment indicators. However, for seal tests, it is still difficult to accurately determine the leakage rate.

[0003] Currently, at home and abroad, mainly pressure testing machines are used for auxiliary measurement. At present, there are two methods for measuring the leakage rate of seal tests. One is the liquid volume per unit time, and the other is the number of bubbles per unit time. Measuring the leakage rate by volume is more scientific, but in specific operations, it is not intuitive. Measuring the leakage rate by bubbles is more convenient, but the bubbles have different sizes, and the expression is not precise. In addition, there is a situation where gas media and liquid media are mixed in the cavity of the valve, and existing devices cannot measure all of them, making it difficult to comprehensively evaluate the quality of valves. Summary of the Utility Model

[0004] The main purpose of the utility model is to propose a valve leakage test device, aiming to ensure that it is a single medium during measurement on the basis of being able to measure various media, and intuitively reflect the test results, improving the reliability and accuracy of the test results.

[0005] To achieve the above purpose, the utility model proposes a valve leakage test device, which includes:

[0006] A first test pipeline for connecting to one end of the valve to be tested;

[0007] A liquid input pipeline, which is connected to the first test pipeline in a switchable manner, and a first container is arranged on the liquid input pipeline;

[0008] A gas input pipeline, which is connected to the first test pipeline in a switchable manner;

[0009] A first air pressure device, selectively communicating with one of the liquid input pipeline and the gas input pipeline to correspondingly drive the liquid in the liquid input pipeline to flow from the first test pipeline into the valve to be tested, and drive the gas in the gas input pipeline to flow from the first test pipeline into the valve to be tested;

[0010] A recovery pipeline, one end of which is connected to the first test pipeline in a switchable manner, and the other end is connected to the first container, and a driving pump is arranged on the recovery pipeline;

[0011] A gas flow rate testing component for connecting to the other end of the valve to be tested; and,

[0012] A liquid flow rate testing component for connecting to the other end of the valve to be tested.

[0013] In one embodiment, the valve leakage testing device includes an air supply pipe, one end of which communicates with the first container and the other end communicates with the first air compressor device;

[0014] One end of the gas input pipeline is connected to the middle of the air supply pipe, and the other end of the air supply pipe is connected to the first test pipeline;

[0015] Wherein, a first solenoid valve is provided at the end of the first container connected to the air supply pipe, and a second solenoid valve is provided on the gas input pipeline.

[0016] In one embodiment, a first stop valve is provided at the air supply pipe near the first air compressor device.

[0017] In one embodiment, the liquid input pipeline includes:

[0018] A first water inlet pipe communicating with the first container;

[0019] Wherein, a second stop valve is provided on the first water inlet pipe, and a third solenoid valve is provided at the first test pipeline near the first container.

[0020] In one embodiment, the recovery pipeline includes:

[0021] A second container;

[0022] A first drain pipe, one end of which communicates with the second container and the other end communicates with the first test pipeline;

[0023] A second water inlet pipe, one end of which communicates with the first container and the other end is connected to the driving pump;

[0024] Wherein, a fourth solenoid valve is provided on the first drain pipe, and a fifth solenoid valve is provided on the second water inlet pipe.

[0025] In one embodiment, the gas flow rate testing component includes a gas flow meter; and / or,

[0026] The liquid flow rate testing component includes:

[0027] A third container;

[0028] A second drain pipe, one end of which is used to connect to the other end of the valve to be tested and the other end communicates with the third container;

[0029] A sixth solenoid valve, which is arranged on the second drain pipe.

[0030] In one embodiment, the valve leakage test device includes:

[0031] A second air compressor device, which is used to connect with the valve under test set as a regulating valve to adjust the opening size of the valve under test.

[0032] In one embodiment, the valve leakage test device includes:

[0033] A second test pipeline, one end of which is used to connect with the other end of the valve under test, and the second test pipeline is communicated with the liquid flow rate test assembly and the liquid flow rate test assembly;

[0034] A filtering device, which is connected to the other end of the second test pipeline.

[0035] In one embodiment, the materials of the first test pipeline, the liquid input pipeline, the gas input pipeline, the first air compressor device, the recovery pipeline, and the liquid flow rate test assembly are all stainless steel.

[0036] In one embodiment, the valve leakage test device further includes a control device and a display panel electrically connected to the control device.

[0037] In the technical solution of the present utility model, when measuring the leakage amount of the liquid medium, the liquid medium is injected into the first container through the liquid input pipeline. When the liquid medium in the first container reaches a certain height, the first air compressor device is sequentially communicated with the liquid input pipeline, the liquid input pipeline is communicated with the first test pipeline, the first air compressor device provides pressure for the liquid input pipeline, drives the liquid medium to enter the first test pipeline, and passes through the valve under test. The liquid flow rate test assembly measures the amount of liquid flowing out of the other end of the valve under test, which is the leakage amount of the liquid medium;

[0038] When measuring the leakage of the gas medium, first disconnect all connections, then connect the recovery pipeline to the first test pipeline. After exhausting the liquid medium, disconnect the connection between the recovery pipeline and the first test pipeline. Then, connect the first air compressor device to the gas input pipeline in sequence, and connect the gas input pipeline to the first test pipeline. The first air compressor device provides pressure for the gas input pipeline, driving the gas medium into the first test pipeline and passing through the valve under test. The gas flow test component measures the gas volume at the other end of the valve under test, which is the leakage of the gas medium. In addition, the recovery pipeline can also pump the recovered liquid medium back to the first container through a driving pump for reuse, reducing waste.

[0039] By providing the first test pipeline, liquid input pipeline, gas input pipeline, first air compressor device, and recovery pipeline, the measurement of the liquid leakage and gas leakage of the valve under test can be completed with one device, and it is ensured that there is only a single medium during the measurement, improving the measurement accuracy. At the same time, by providing a liquid flow test component and a gas flow test component, a rigorous quantitative evaluation of the valve under test is carried out, improving the measurement reliability. In addition, the recovery pipeline can also pump the recovered liquid medium back to the first container through a driving pump for reuse, reducing waste. Description of the Drawings

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0041] Figure 1 It is a schematic structural diagram of an embodiment of the valve leakage test device provided by the present invention;

[0042] Explanation of the Reference Numerals in the Drawings

[0043] 100. Valve leakage test device; 1. First test pipeline; 11. Pressure gauge; 2. Liquid input pipeline; 21. First water inlet pipe; 22. Second stop valve; 23. Third solenoid valve; 24. First container; 3. Gas input pipeline; 31. Second solenoid valve; 4. First air compressor device; 41. First stop valve; 5. Air supply pipe; 51. First solenoid valve; 6. Recovery pipeline; 61. Second container; 62. First drain pipe; 63. Second water inlet pipe; 64. Fourth solenoid valve; 65. Fifth solenoid valve; 66. Driving pump; 7. Gas flow rate test component; 8. Liquid flow rate test component; 81. Third container; 82. Second drain pipe; 83. Sixth solenoid valve; 9. Second air compressor device; 10. Control device;

[0044] 200. Valve to be tested.

[0045] The realization, functional features and advantages of the purpose of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0046] 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 creative efforts shall fall within the protection scope of the present utility model.

[0047] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0048] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0049] Currently, at home and abroad, auxiliary measurements are mainly carried out with the help of a pressure testing machine. At present, there are two measurement methods for the leakage amount in the seal test. One is the liquid volume per unit time, and the other is the number of bubbles per unit time. Measuring the leakage amount by volume is more scientific, but in specific operations, it is not intuitive. Measuring the leakage amount by bubbles is more convenient, but the bubbles are of different sizes, and the expression is not rigorous. In addition, there is a situation where gas medium and liquid medium are mixed in the cavity of the valve, and the existing devices cannot measure all of them, making it difficult to comprehensively evaluate the quality of the valve.

[0050] Therefore, the present utility model proposes a valve leakage test device.

[0051] It should be noted that the valve to be tested 200 in the present utility model can be any valve that needs to bear hydraulic pressure or air pressure, including regulating valves and globe valves. The present utility model does not make any restrictions here.

[0052] Please refer to Figure 1 , in an embodiment of the present utility model, the valve leakage test device includes a first test pipeline 1, a liquid input pipeline 2, a gas input pipeline 3, a first air compressor device 4, a recovery pipeline 6, a gas flow test component 7, and a liquid flow test component 8. The first test pipeline 1 is used to connect to one end of the valve to be tested 200, and both the gas medium and the liquid medium are transported to the valve to be tested 200 through the first test pipeline 1; the liquid input pipeline 2 is connected to the first test pipeline 1 in a switchable manner, and a first container 24 is arranged on the liquid input pipeline 2; the gas input pipeline 3 is connected to the first test pipeline 1 in a switchable manner; the first air compressor device 4 is selectively communicated with one of the liquid input pipeline 2 and the gas input pipeline 3 to correspondingly drive the liquid in the liquid input pipeline 2 to flow from the first test pipeline 1 into the valve to be tested 200, and drive the gas in the gas input pipeline 3 to flow from the first test pipeline 1 into the valve to be tested 200; one end of the recovery pipeline 6 is connected to the first test pipeline 1 in a switchable manner, and the other end is communicated with the first container 24, and a driving pump 66 is arranged on the recovery pipeline 6; the gas flow test component 7 is used to connect to the other end of the valve to be tested 200; the liquid flow test component 8 is used to connect to the other end of the valve to be tested 200.

[0053] In the technical solution of the present utility model, when measuring the leakage amount of a liquid medium, a liquid medium is injected into the first container 24 through the liquid input pipeline 2. When the liquid medium in the first container 24 reaches a certain height, the first air pressure device 4 is successively connected to the liquid input pipeline 2, the liquid input pipeline 2 is connected to the first test pipeline 1, the first air pressure device 4 provides pressure for the liquid input pipeline 2, drives the liquid medium into the first test pipeline 1, and passes through the valve under test 200. The liquid flow test assembly 8 measures the amount of liquid flowing out of the other end of the valve under test 200, which is the leakage amount of the liquid medium;

[0054] When measuring the leakage amount of a gas medium, first disconnect all connections, then connect the recovery pipeline 6 to the first test pipeline 1. After exhausting the liquid medium, disconnect the connection between the recovery pipeline 6 and the first test pipeline 1. Successively connect the first air pressure device 4 to the gas input pipeline 3, the gas input pipeline 3 is connected to the first test pipeline. The first air pressure device 4 provides pressure for the gas input pipeline 3, drives the gas medium into the first test pipeline 1, and passes through the valve under test 200. The gas flow test assembly 7 measures the amount of gas at the other end of the valve under test 200, which is the leakage amount of the gas medium. In addition, the recovery pipeline 6 can also pump the recovered liquid medium back to the first container 24 through the driving pump 66 for reuse, reducing waste.

[0055] By setting up the first test pipeline 1, the liquid input pipeline 2, the gas input pipeline 3, the first air pressure device 4, and the recovery pipeline 6, the measurement of the liquid leakage amount and the gas leakage amount of the valve under test 200 can be completed with one device, and it is ensured that there is only a single medium during the measurement, improving the measurement accuracy; at the same time, by setting up the liquid flow test assembly 8 and the gas flow test assembly 7, a rigorous quantitative evaluation of the valve under test 200 is carried out, improving the measurement reliability. In addition, the recovery pipeline 6 can also pump the recovered liquid medium back to the first container 24 through the driving pump 66 for reuse, reducing waste.

[0056] In an embodiment of the present utility model, the valve leakage test device includes an air supply pipe 5. One end of the air supply pipe 5 is communicated with the first container 24, and the other end is communicated with the first air compressor device 4. One end of the gas input pipeline 3 is connected to the middle part of the air supply pipe 5, and the other end of the air supply pipe 5 is connected to the first test pipeline 1. Wherein, a first solenoid valve 51 is arranged at the end of the first container 24 connected to the air supply pipe 5, and a second solenoid valve 31 is arranged on the gas input pipeline 3. When measuring the leakage amount of the liquid medium, the second solenoid valve 31 is closed, and the first air compressor device 4 applies pressure to the first container 24 through the air supply pipe 5 to press the liquid in the first container 24 into the first test pipeline 1. When measuring the leakage amount of the gas medium, the first solenoid valve 51 is closed, and the pressurized gas provided by the first air compressor device 4 enters the first test pipeline 1 through the air supply pipe 5 and the gas input pipeline 3. Further, the pressurized gas provided by the first air compressor device 4 can be directly used as the gas medium for testing. In this embodiment, by controlling the operation of the first solenoid valve 51 and the second solenoid valve 31 (including opening and closing and the flow rate of opening), the connection between the first container 24 and the first air compressor device 4 and the connection between the gas input pipeline 3 and the first air compressor device 4 can be connected and disconnected; thereby controlling the pressure of the liquid to be measured and reducing the labor intensity of technicians.

[0057] Further, for the consideration of safety protection and convenient maintenance, a first stop valve 41 is arranged near the first air compressor device 4 on the air supply pipe 5. By setting the first stop valve 41 at the key air intake position and manually controlling the valve switch, when the solenoid valve or the control system of the first air compressor device 4 fails, the excessive air pressure in the pipeline can still be prevented, increasing the reliability of the device. In addition, when the device needs to be maintained or a certain section of the pipeline needs to be isolated, the first stop valve 41 can be quickly closed to effectively cut off the fluid, facilitating operations such as maintenance, component replacement, or pipeline cleaning. In an emergency, the first stop valve 41 can be quickly closed as the first line of defense to prevent the expansion of the accident. For example, when a leakage occurs, the source can be immediately cut off to reduce losses.

[0058] In an embodiment of the present utility model, the liquid input pipeline 2 further includes a first water inlet pipe 21, and the first water inlet pipe 21 is communicated with the first container 24. When measuring the leakage amount of the liquid medium, the liquid medium for measurement is input into the first container 24 through the first water inlet pipe 21. The first water inlet pipe 21 is provided with a second stop valve 22, and the valve switch is manually controlled to prevent the pipeline from still inputting liquid and causing damage to the device when the control system in the device fails, thereby increasing the reliability of the device; a third solenoid valve 23 is arranged near the first container 24 on the first test pipeline 1. In this embodiment, by controlling the operation of the third solenoid valve 23 (including opening and closing and the flow rate of opening), the first test pipeline 1 and the first container 24 can be connected in a switchable manner; thereby controlling the pressure of the liquid to be measured and reducing the labor intensity of technicians.

[0059] In an embodiment of the present utility model, the recovery pipeline 6 includes a second container 61, a first drain pipe 62, and a second water inlet pipe 63. One end of the second water inlet pipe 63 is communicated with the second container 61, and the other end is communicated with the first test pipeline; one end of the second water inlet pipe 63 is communicated with the first container 24, and the other end is connected to the drive pump 66; wherein, a fourth solenoid valve 64 is arranged on the first drain pipe 62, and a fifth solenoid valve 65 is arranged on the second water inlet pipe 63. In this embodiment, by controlling the operation of the fourth solenoid valve 64 and the fifth solenoid valve 65 (including opening and closing and the flow rate of opening), the first test pipeline 1 and the second container 61, and the second container 61 and the first container 24 can be connected in a switchable manner; thereby controlling the pressure of the liquid to be measured and reducing the labor intensity of technicians; after the leakage amount test of the liquid medium is completed, the fourth solenoid valve 64 is opened, and the liquid medium enters the second container 61 from the first drain pipe 62 through the first test pipeline 1 for storage. When the liquid medium flows out from the first test pipeline, the fourth solenoid valve 64 is closed, so as to ensure that there is no interference from the previous liquid medium when the valve leakage test device conducts a new leakage test, thereby increasing the test accuracy. In addition, when the liquid in the second container 61 accumulates to a certain amount, or when the valve leakage test device needs to conduct a new liquid medium leakage test, the fifth solenoid valve 65 can be opened, and the drive pump 66 pumps the liquid medium in the second container 61 back into the first container 24 to form a closed-loop liquid medium circulation system, thereby reducing the water consumption required for multiple tests of the leakage amount of the regulating valve and reducing waste.

[0060] In an embodiment of the present utility model, the gas flow rate testing assembly 7 includes a gas flow meter. When testing the leakage rate of a gas medium, the gas flow meter is used to connect to the other end of the valve under test 200, and the gas flow rate measured in the gas flow meter is the gas leakage rate of the valve under test 200.

[0061] In an embodiment of the present utility model, the liquid flow rate testing assembly 8 includes: a third container 81 and a second drain pipe 82. One end of the second drain pipe 82 is used to connect to the other end of the valve under test 200, and the other end is communicated with the third container 81. Among them, a sixth solenoid valve 83 is arranged on the second water inlet pipe 63 to realize the electric control of the on-off of the second water inlet pipe 63. When testing the leakage rate of a liquid medium, the sixth solenoid valve 83 is opened, and the liquid medium leaked from the valve under test 200 enters the third container 81 through the second drain pipe 82. The liquid medium collected in the third container 81 is the liquid leakage rate of the valve under test 200. By reading the liquid content in the third container 81 and the gas flow rate of the gas flow meter, the leakage rate of the valve under test 200 can be known, and the test result can be clearly and intuitively reflected.

[0062] In an embodiment of the present utility model, the valve leakage testing device further includes a second air pressure device 9. When the valve under test 200 is set as a regulating valve, the second air pressure device 9 is connected to the actuator of the regulating valve to provide power for the actuator to control the opening size of the regulating valve. In addition, in order to save costs, the first air pressure device 4 can also be used as a power device to control the opening size of the regulating valve.

[0063] It can be foreseen that the leakage rate of the valve under test 200 is very small, and the air flow in the environment where the valve leakage testing device is located and the liquefaction of water vapor in the air are likely to affect the test result of the leakage rate. Therefore, the valve leakage testing device further includes a second test pipeline and a filtering device. One end of the second test pipeline is used to connect to the other end of the valve under test 200, and the second test pipeline is communicated with the liquid flow rate testing assembly 8 and the liquid flow rate testing assembly 8. The filtering device is connected to the other end of the second test pipeline. In an embodiment of the present utility model, the filtering device can be a pressure regulating valve. By keeping the pressure in the valve leakage testing device slightly greater than the atmospheric pressure, air is prevented from entering the device, thereby preventing air and water vapor in the air from affecting the gas-liquid flow rate testing assembly. In another embodiment of the present utility model, the filtering device can also be a drying pipe or a drying device, which filters the water vapor entering the second test pipeline to prevent the liquid flow rate testing assembly 8 from generating errors.

[0064] In an embodiment of the present utility model, the liquid medium or the gas medium may be corrosive, which affects the service life of the pipeline. Therefore, the materials of the first test pipeline 1, the liquid input pipeline 2, the gas input pipeline 3, the first air compressor device 4, the recovery pipeline 6, and the liquid flow rate test assembly 8 are all stainless steel. Compared with other materials such as carbon steel, stainless steel has strong corrosion resistance and can be used multiple times, making the device more reliable and the comprehensive cost lower.

[0065] In an embodiment of the present utility model, scales are installed on the first container 24, the second container 61, and the third container 81; a pressure sensor is provided in the first container 24, and a pressure gauge 11 is provided on the test pipeline, and the pressure gauge 11 is located between the first container 24 and the test valve; the valve leakage test device further includes a control device 10 and a display panel electrically connected to the control device 10. The control system is used to control the switching of components such as the air compressor device, the solenoid valve, and the driving pump 66; the control system includes a display panel to display the pressure in the first container 24, the pressure in the test pipeline, the water level height in the first container 24, the water level height in the second container 61, the water level height in the third container 81, and the gas flow rate of the gas flowmeter. By controlling, displaying, and processing the device through the control system, the valve leakage test is made more convenient and the test results are more accurate.

[0066] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A valve leakage testing device, characterized in that: include: A first test pipeline, which is used to be connected to one end of the valve to be tested; A liquid input pipeline, connected to the first test pipeline in an on-off manner, wherein a first container is arranged on the liquid input pipeline; A gas input pipeline, connected to the first test pipeline in an on-off manner; A first air compressor is selectively connected to one of the liquid input pipeline and the gas input pipeline to drive the liquid in the liquid input pipeline to flow from the first test pipeline to the valve to be tested, and drives the gas in the gas input pipeline to flow from the first test pipeline to the valve to be tested; A recovery pipeline, one end of which is connected to the first test pipeline in an on-off manner, and the other end of which is connected to the first container, and a driving pump is provided on the recovery pipeline; a gas flow test assembly, which is used to be connected to the other end of the valve to be tested; and The liquid flow test assembly is used to be connected to the other end of the valve to be tested.

2. A valve leakage testing device as claimed in claim 1, characterized in that: The valve leakage testing device comprises an air supply pipe, one end of which is connected to the first container, and the other end of which is connected to the first air compressor; One end of the gas input pipeline is connected to the middle of the gas supply pipe, and the other end of the gas supply pipe is connected to the first test pipeline; Wherein, a first solenoid valve is arranged at one end of the gas supply pipe connected to the first container, and a second solenoid valve is arranged on the gas input pipeline.

3. A valve leakage testing device as claimed in claim 2, characterized in that: The air supply pipe is provided with a first stop valve near the first air compressor.

4. A valve leakage testing device as claimed in claim 1, characterized in that: The liquid input pipeline comprises: a first water inlet pipe, the first water inlet pipe being in communication with the first container; Wherein, the first water inlet pipe is provided with a second stop valve, and the first test pipeline is provided with a third solenoid valve near the first container.

5. A valve leakage testing device as claimed in claim 1, characterized in that: The recovery pipeline comprises: a second container; a first drain pipe, one end of which is connected to the second container and the other end of which is connected to the first test pipeline; a second water inlet pipe, one end of which is connected to the first container and the other end of which is connected to the driving pump; Wherein, a fourth solenoid valve is arranged on the first drainage pipe, and a fifth solenoid valve is arranged on the second water inlet pipe.

6. A valve leakage testing device as claimed in claim 1, characterized in that: The gas flow test assembly comprises a gas flow meter; and / or, The liquid flow test assembly comprises: The third container; A second drain pipe, one end of which is connected to the other end of the valve to be tested, and the other end of which is communicated with the third container; Wherein, a sixth solenoid valve is arranged on the second drain pipe.

7. A valve leakage testing device as claimed in claim 1, characterized in that: The valve leakage testing device comprises: The second air compressor is used to be connected to the valve to be tested which is set as a regulating valve to adjust the opening size of the valve to be tested.

8. A valve leakage testing device according to claim 1, comprising: A second test pipeline, one end of which is used to be connected to the other end of the valve to be tested, and the second test pipeline is in communication with the liquid flow test assembly and the liquid flow test assembly; A filtering device is connected to the other end of the second test pipeline.

9. A valve leakage testing device as claimed in claim 1, characterized in that: The first test pipeline, the liquid input pipeline, the gas input pipeline, the first air compressor, the recovery pipeline, and the liquid flow test assembly are all made of stainless steel.

10. A valve leakage testing device as claimed in claim 1, characterized in that: The valve leakage testing device includes a control device and a display panel electrically connected to the control device.

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