A gas-liquid testing device for fluid valves

Abstract

The present application relates to a gas-liquid testing device for a fluid valve, which includes an operating table, a gas supply assembly, a liquid supply assembly, and a sealing tube assembly. The gas supply assembly and the liquid supply assembly are both connected to the operating table. The sealing tube assembly is provided with multiple sealing tube assemblies. The sealing tube assembly includes a valve connection end and a device connection end. The device connection end is connected to the gas supply assembly and the liquid supply assembly. The valve connection end is used to connect a fluid valve. A switch is provided in the sealing tube assembly. The switch is used to control the flow of fluid between the valve connection end and the device connection end. The present application has the effect of simplifying the process of detecting the air tightness of fluid valves and the detection process of the tightness of fluids.

Description

Technical Field

[0001] The present application relates to the field of gas-liquid testing equipment, and in particular to a gas-liquid testing equipment for a fluid valve. Background Art

[0002] Currently, fluid valves are used to control the flow rate of fluid in a flow path, and therefore fluid valves are widely used as components in industrial equipment.

[0003] In related technologies, fluid valves, as precision components, must have excellent airtightness. Furthermore, they must withstand a certain amount of fluid pressure during operation, so they also need to have excellent fluid tightness. Generally, to ensure that fluid valves have excellent airtightness and fluid tightness, they must be tested after manufacture.

[0004] Regarding the above-mentioned related technologies, in most cases, the air tightness test and fluid tightness test of the fluid valve need to be performed by different equipment. Therefore, during the test process, the fluid valve and the test equipment need to be sealed twice, which makes the test process more complicated. Summary of the Invention

[0005] In order to simplify the process of detecting the air tightness of a fluid valve and the fluid tightness, the present application provides a gas-liquid testing device for a fluid valve.

[0006] The present application provides a gas-liquid testing device for a fluid valve using the following technical solution:

[0007] A gas-liquid testing device for a fluid valve comprises an operating table, a gas supply assembly, a liquid supply assembly and a sealing tube assembly, wherein the gas supply assembly and the liquid supply assembly are both connected to the operating table, and the sealing tube assembly is provided with multiple components, each of which comprises a valve connection end and a device connection end, wherein the device connection end is connected to the gas supply assembly and the liquid supply assembly, and the valve connection end is used to connect a fluid valve, and a switch component is provided in the sealing tube assembly, and the switch component is used to control the flow of fluid between the valve connection end and the device connection end.

[0008] By adopting the above technical solution, the valve connection end of the blocking tube assembly is connected to the fluid valve, and the blocking tube assembly corresponds to the valve port of the fluid valve one by one. When testing the air tightness of the fluid valve, first open the switch of one of the blocking tube assemblies, and at the same time close the switch of the other blocking tube assemblies, and then the gas supply assembly connected to the opened blocking tube assembly injects gas into the fluid valve. When the air pressure in the fluid valve reaches the specified air pressure, the gas supply assembly stops supplying gas. If the air pressure in the fluid valve remains unchanged for a period of time, it indicates that the air tightness of the fluid valve is good, otherwise the air tightness of the fluid valve is poor. When testing the fluid tightness of the fluid valve, first open the switch of two of the blocking tube assemblies, and at the same time close the switch of the other blocking tube assemblies, and then one of the liquid supply assemblies connected to the opened blocking tube assembly injects fluid into the fluid valve. If the fluid flow rate flowing into the fluid valve along this blocking tube assembly is equal to the fluid flow rate flowing out of the fluid valve along the other blocking tube assembly, it indicates that the fluid tightness of the fluid valve is good, otherwise the fluid tightness of the fluid valve is poor. Therefore, this solution can detect the air tightness and fluid tightness of the fluid valve through the same equipment, thereby simplifying the fluid valve air tightness detection and fluid tightness detection process.

[0009] Preferably, the device connection end of one of the blocking tube assemblies is connected to at least two of the liquid supply assemblies.

[0010] By adopting the above-mentioned technical solution, when the fluid valve to be tested needs to be tested for fluid tightness for different types of fluids, each sealing tube assembly in this solution is connected to multiple liquid supply assemblies, and each liquid supply assembly can inject different types of fluids into the fluid valve. Therefore, this solution can perform fluid tightness testing on the fluid valve for different types of fluids through the same equipment, thereby further simplifying the fluid tightness testing process of the fluid valve.

[0011] Preferably, a flexible diaphragm is provided on the inner wall of the sealing tube assembly, and the flexible diaphragm is used to separate the gas supplied by the gas supply assembly and the liquid supplied by the liquid supply assembly, or to separate the liquids supplied by the two liquid supply assemblies. Under the pressure of the fluid, the flexible diaphragm can be tightly attached to the sealing tube assembly.

[0012] By adopting the above technical solution, different liquid supply assemblies connected to the same plugging tube assembly are used to supply different types of liquids. In this solution, after the fluid valve performs a fluid tightness test for one liquid, it is necessary to clean the fluid valve with clean water before performing a fluid tightness test for another liquid. Therefore, after long-term operation of the plugging tube assembly, the inner wall may be contaminated with viscous liquid. The liquid adhering to the inner wall of the plugging tube assembly may contaminate other fluids, thereby affecting the fluid tightness of the fluid valve. Therefore, in this solution, different liquid supply assemblies are separated by flexible diaphragms. When the liquid supplied by the liquid supply assembly flows in the plugging tube assembly, it can only contact the corresponding flexible diaphragm. At the same time, the flexible diaphragm can adhere to the inner wall of the plugging tube assembly under the action of fluid pressure. Therefore, the flexible diaphragm can separate the different liquid supply assemblies while minimizing the impact on the fluid flow rate.

[0013] Preferably, it further comprises a driving assembly, the driving assembly is connected to the operating table, the blocking tube assembly is movably connected to the operating table, and the driving assembly is used to drive the blocking tube assembly to move.

[0014] By adopting the above-mentioned technical solution, the blocking tube assembly can move relative to the operating table under the driving action of the driving assembly. Therefore, this solution can change the position of the blocking tube assembly for fluid valves of different sizes, so that the blocking tube assembly can be connected to the valve ports of fluid valves of different sizes. Therefore, this solution can be applicable to fluid valves of different sizes.

[0015] Preferably, the driving assembly includes a driving cylinder and a connecting block, the driving cylinder is provided with a plurality of piston rods, one end of the connecting block is connected to the blocking tube assembly, and the other end of the connecting block is connected to the piston rod of the driving cylinder.

[0016] By adopting this technical solution, when the blocking tube assembly is connected to the fluid valve, the driving cylinder can also apply force to the blocking tube assembly, causing it to press against the fluid valve, thereby further tightening the connection between the blocking tube assembly and the fluid valve in this solution. Furthermore, the driving cylinder has multiple piston rods, allowing the driving cylinder to apply force to the connecting block from different points, ensuring that the connecting block can more stably support the blocking tube assembly.

[0017] Preferably, the sealing tube assembly is connected to the center of the end face of the connecting block, the piston rods of the driving cylinders are arranged in a row perpendicular to the moving direction of the sealing tube assembly, and the distance between the piston rods of the first and last driving cylinders is greater than the outer diameter of the sealing tube assembly.

[0018] By adopting the above technical solution, the piston rod of the driving cylinder can better support the sealing tube assembly through the connecting block, making the sealing tube assembly less likely to shake when subjected to axial force during operation, thereby improving the overall stability of this solution.

[0019] Preferably, it further comprises a fixing frame assembly, wherein the fixing frame assembly is slidably connected to the operating table and is used to fix the flow valve.

[0020] By adopting the above technical solution, under the action of the fixing frame assembly, the position of the fluid valve relative to the blocking tube assembly is easier to adjust, so this solution can further facilitate the connection between the blocking tube assembly and the valve port of the fluid valve.

[0021] Preferably, the fixing frame assembly includes a sliding connector and a valve fixing member, the valve fixing member is used to fix the flow valve, and the valve fixing member is connected to the sliding connector; two parallel guide rails are provided on the operating table, one end of the sliding connector is slidably connected to one of the guide rails, and the other end of the sliding connector is slidably connected to the other guide rail, and the valve fixing member is arranged between the two guide rails.

[0022] By adopting the above technical solution, under the action of the guide rails and the sliding connector, the movement of the fixing frame assembly is easier to operate; at the same time, when the valve fixing member is arranged between the two guide rails, the guide rails can provide better support for the valve fixing seat, so the fluid valve can be more stable during the detection process.

[0023] Preferably, the switch element is arranged close to the valve connection end.

[0024] By adopting the above technical solution, before performing air tightness detection and fluid tightness detection on the fluid valve, this solution first closes the switch parts on each sealing tube assembly, and then opens all gas supply assemblies to detect whether the air tightness of the sealing tube assembly itself is good.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The valve connection end of the blocking tube assembly is connected to the fluid valve, and the blocking tube assembly corresponds to the valve port of the fluid valve one by one. When testing the air tightness of the fluid valve, first open the switch of one of the blocking tube assemblies, and close the switch of the other blocking tube assemblies at the same time, and then use the gas supply assembly connected to the opened blocking tube assembly to inject gas into the fluid valve. When the air pressure in the fluid valve reaches the specified air pressure, the gas supply assembly stops supplying gas. If the air pressure in the fluid valve remains unchanged for a period of time, it indicates that the air tightness of the fluid valve is good, otherwise the air tightness of the fluid valve is poor. When testing the fluid tightness of the fluid valve, first open the switch of two of the blocking tube assemblies, and close the switch of the other blocking tube assemblies at the same time, and then use the liquid supply assembly connected to the opened blocking tube assembly to inject fluid into the fluid valve. If the fluid flow rate flowing into the fluid valve along this blocking tube assembly is equal to the fluid flow rate flowing out of the fluid valve along the other blocking tube assembly, it indicates that the fluid tightness of the fluid valve is good, otherwise the fluid tightness of the fluid valve is poor. Therefore, this solution can detect the air tightness and fluid tightness of the fluid valve through the same equipment, thereby simplifying the fluid valve air tightness detection and fluid tightness detection process;

[0027] 2. Different liquid supply assemblies connected to the same blocking tube assembly are used to supply different types of liquids. In this solution, after the fluid valve performs a fluid tightness test for one liquid, it is necessary to clean the fluid valve with clean water, and then perform a fluid tightness test for another liquid. Therefore, after long-term operation of the blocking tube assembly, the inner wall may be contaminated with viscous liquid. The liquid sticking to the inner wall of the blocking tube assembly may pollute other fluids, thereby affecting the fluid tightness of the fluid valve. Therefore, in this solution, different liquid supply assemblies are separated by flexible diaphragms. The liquid supplied by the liquid supply assembly can only contact the corresponding flexible diaphragm when flowing in the blocking tube assembly. At the same time, the flexible diaphragm can stick to the inner wall of the blocking tube assembly under the action of fluid pressure. Therefore, the flexible diaphragm can separate different liquid supply assemblies while minimizing the impact on the fluid flow rate.

[0028] 3. Under the driving action of the driving assembly, the sealing tube assembly can move relative to the operating table. Therefore, this solution can change the position of the sealing tube assembly for fluid valves of different sizes, so that the sealing tube assembly can be connected to the valve ports of fluid valves of different sizes. Therefore, this solution can be applicable to fluid valves of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 An axonometric view of a gas-liquid test device for fluid valves.

[0030] Figure 2 is a cross-sectional view of the plugging tube assembly.

[0031] Figure 3 is a cross-sectional view of the flexible diaphragm member.

[0032] Explanation of the accompanying drawings: 1. Operating table; 11. Guide rail; 12. Mounting seat; 13. Working position; 2. Gas supply assembly; 3. Liquid supply assembly; 4. Sealing pipe assembly; 41. Switch member; 42. Valve connection end; 43. Equipment connection end; 44. Flexible diaphragm member; 441. Inlet; 442. Outlet; 45. Connection port; 5. Drive assembly; 51. Drive cylinder; 52. Connecting block; 6. Fixed frame assembly; 61. Sliding connector; 62. Valve fixing member; 63. Drive component; 7. Liquid collection assembly. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0034] An embodiment of the present application discloses a gas-liquid testing device for a fluid valve.

[0035] Reference Figure 1 A gas-liquid testing device for a fluid valve includes an operating table 1, a gas supply assembly 2, a liquid supply assembly 3, a sealing tube assembly 4, a driving assembly 5 and a fixing frame assembly 6; wherein the sealing tube assembly 4 and the fixing frame assembly 6 can be movably connected to the operating table 1, the fixing frame assembly 6 is used to fix the fluid valve, and the sealing tube assembly 4 is used to connect the valve port of the fluid valve; the gas supply assembly 2, the liquid supply assembly 3 and the driving assembly 5 are connected to the operating table 1, the driving assembly 5 is used to move the sealing tube assembly 4, the gas supply assembly 2 is used to transport gas into the fluid valve along the sealing tube assembly 4, and the liquid supply assembly 3 is used to transport liquid into the fluid valve along the sealing tube assembly 4.

[0036] Through the above structure, when this scheme performs air tightness testing on the fluid valve, the fixing frame assembly 6 fixes the fluid valve, and then the fixing frame assembly 6 is moved to an appropriate position, and then connected to the valve port of the fluid valve through the sealing tube assembly 4. Then, according to the test requirements, the sealing tube assembly 4 corresponding to the valve port to be tested is opened, and the other part of the sealing tube assembly 4 is closed. Then, the gas supply assembly 2 injects gas into the fluid valve along the opened sealing tube assembly 4, so that the air pressure in the closed fluid valve reaches the specified value. The change of the air pressure in the fluid valve is observed over the next period of time. If the air pressure in the fluid valve remains constant, it means that the air tightness of the fluid valve is good.

[0037] In addition, when this solution performs a fluid tightness test on a fluid valve, the sealing tube assembly 4 corresponding to the valve port to be tested is opened, and the other sealing tube assembly 4 is closed. The valve ports to be tested of the fluid valve are interconnected to form a fluid flow channel. Subsequently, the liquid supply assembly 3 injects liquid into one of the valve ports to be tested. After a period of time, if the flow rate of liquid flowing into the fluid valve is equal to the flow rate of liquid flowing out of the fluid valve, it indicates that the fluid tightness of the fluid valve is good. Therefore, this solution can test the air tightness and fluid tightness of a fluid valve using the same equipment, thereby simplifying the fluid valve air tightness test and fluid tightness test process.

[0038] Reference Figure 1 Specifically, the operating table 1 is provided with two mutually parallel guide rails 11 and a protruding mounting seat 12. The guide rails 11 are used to guide the movement of the fixed frame assembly 6, and the protruding mounting seat 12 is used for the installation of the drive assembly 5. In this embodiment, the number of the blocking tube assemblies 4 and the drive assemblies 5 are both three; in other embodiments, the blocking tube assemblies 4 can also be set to other numbers according to the number of valve ports of the fluid valve to be tested, and the blocking tube assemblies 4 and the drive assemblies 5 correspond one to one. A working position 13 is provided on the operating table 1. The fixed frame assembly 6 can drive the fluid valve to move to the working position 13. The blocking tube assembly 4 can move in a direction toward or away from the working position 13, and the moving direction of the blocking tube assembly 4 is perpendicular to the extension direction of the guide rails 11.

[0039] One of the drive assemblies 5 is connected to the mounting base 12, and the other two drive assemblies 5 are connected to the upper end surface of the operating table 1. The drive assembly 5 connected to the mounting base 12 can drive the corresponding blocking tube assembly 4 to move perpendicularly to the end surface of the operating table 1, and the other two drive assemblies 5 can drive the corresponding blocking tube assembly 4 to move parallel to the end surface of the operating table 1. The two drive assemblies 5 connected to the upper end surface of the operating table 1 are symmetrically arranged along the working position 13.

[0040] The driving assembly 5 includes a driving cylinder 51 and a connecting block 52. The driving cylinder 51 is provided with a plurality of mutually parallel piston rods. In this embodiment, the number of piston rods of the driving cylinder 51 is three. In other embodiments, the number of piston rods of the driving cylinder 51 can also be other numbers. The connecting block 52 is a rectangular parallelepiped. The piston rods of the driving cylinder 51 are all connected to one end face of the connecting block 52. The end of the sealing tube assembly 4 away from the working position 13 is connected to the other end face of the connecting block 52. The three piston rods of the driving cylinder 51 are arranged in a row. The axis of the sealing tube assembly 4, the axis of the connecting block 52 and the axis of the middle piston rod are collinear. The distance between the other two piston rods is greater than the outer diameter of the sealing tube assembly 4.

[0041] Through the above structure, the driving cylinder 51 can drive the sealing tube assembly 4 to move, so this solution can be adapted to fluid valves of different sizes. At the same time, when the sealing tube assembly 4 is connected to the corresponding fluid valve port, the driving cylinder 51 can also enable the sealing tube assembly 4 to press the fluid valve, so that the fluid valve is not easy to shake during the measurement process. Therefore, this solution also has better stability.

[0042] Reference Figure 1 Specifically, the fixed frame assembly 6 includes a sliding connector 61, a valve fixing member 62, and a drive component 63. The sliding connector 61 is a rectangular parallelepiped. The guide rail 11 is a smooth straight rod, which is erected along both ends. One end face of the sliding connector 61 is connected to the guide rail 11 via a linear bearing, and the other opposite end face of the sliding connector 61 is connected to the valve fixing member 62. The valve fixing member 62 is used to fix the fluid valve. In a top view, the valve fixing member 62 is located between the two guide rails 11. The drive component 63 is a motor, which is fixedly connected to the operating table 1. The rotating shaft of the drive component 63 is connected to a screw rod. The sliding connector 61 cooperates with the screw rod on the drive component 63 through a slider.

[0043] Through the above structure, the fixing frame assembly 6 can drive the fluid valve to move, so the valve ports of fluid valves of different sizes in this solution can be moved to the appropriate position, allowing the sealing tube assembly 4 to connect with the valve port of the fluid valve. At the same time, because the valve fixing member 62 is located between the two guide rails 11, the guide rails 11 can better support the valve fixing seat, thereby achieving better stability of this solution.

[0044] Reference Figure 1 and 2 Specifically, the blocking tube assembly 4 includes a valve connection end 42 and a device connection end 43. The valve connection end 42 is used to connect to the valve port of the flow valve, and the device connection end 43 is connected to the drive assembly 5. The blocking tube assembly 4 is provided with a switch 41 at the valve connection end 42. The switch 41 is a solenoid valve. The switch 41 is used to control the caliber of the flow through the blocking tube assembly 4. The blocking tube assembly 4 is provided with a plurality of connection ports 45 on one side of the device connection end 43. The connection ports 45 are evenly distributed along the circumference of the axis of the blocking tube assembly 4. The connection ports 45 are connected to the gas supply assembly 2, the liquid supply assembly 3 or the liquid collection assembly 7 through a hose. The liquid collection assembly 7 is used to collect and measure the liquid flowing out of the fluid pump. In this solution, the liquid collection assembly 7 is a measuring cup. In other embodiments, the liquid collection assembly 7 can also be other containers with a volume measurement function.

[0045] Reference Figure 1 、 23. In this embodiment, the number of liquid supply components 3 is two. In other embodiments, the number of liquid supply components 3 can also be other. Different liquid supply components 3 are used to hold different types of liquids, and each liquid supply component 3 is simultaneously connected to three blocking tube components 4. A flexible diaphragm component 44 is also provided in the blocking tube component 4. The flexible diaphragm component 44 is made of elastic rubber material and is sleeve-shaped. An inlet 441 is provided at one end of the flexible diaphragm component 44, and an outlet 442 is provided at the other end of the flexible diaphragm component 44. The inlet hole of the flexible diaphragm component 44 is connected to the corresponding connecting port 45. The outer wall of the end of the flexible diaphragm component 44 with the outlet 442 is adhered to the inner wall of the blocking tube component 4. When fluid flows out along the connecting port 45, the corresponding flexible diaphragm component 44 can open under the pressure of the fluid, and the outer wall of the flexible diaphragm component 44 can be tightly attached to the inner wall of the blocking tube component 4.

[0046] Through the above structure, when measuring the fluid tightness of the fluid valve, the liquid supply component 3 inputs the test liquid along the corresponding sealing tube component 4, the liquid flows through the fluid valve and flows out along another sealing tube component 4, and the outflowing liquid finally flows into the liquid collection component 7. After a period of time, if the liquid in the liquid collection component 7 is consistent with the liquid output by the liquid supply component 3, it means that the fluid tightness of the fluid valve is good.

[0047] In addition, when gas or liquid flows along the flexible diaphragm 44, the flexible diaphragm 44 can open and fit against the side wall of the sealing tube assembly 4. Therefore, this solution can ensure that the maximum flow rate of the fluid along the sealing tube assembly 4 remains unchanged. At the same time, under the action of the flexible diaphragm 44, different types of fluids can only contact the inner wall of the corresponding flexible diaphragm 44. Therefore, different types of fluids are difficult to contact each other in the process of flowing along the sealing tube assembly 4 to the fluid valve, thereby greatly reducing the measurement error caused by the mixing of different test liquids in the sealing tube assembly 4.

[0048] In summary, in this solution, the device connection end 43 of the sealing tube assembly 4 is connected to the gas supply assembly 2, and the device connection end 43 of the sealing tube assembly 4 is connected to the liquid supply assembly 3. Therefore, this solution can sequentially perform air tightness tests and fluid tightness tests on the fluid valve on the fixed frame assembly 6, thereby simplifying the fluid valve air tightness testing and fluid tightness testing processes. In addition, under the action of the flexible diaphragm 44, different liquids flowing through the sealing tube assembly 4 are unlikely to directly contact the inner wall of the sealing tube during the process of flowing into the fluid valve, so different liquids are unlikely to mix with each other. Therefore, this solution can reduce errors caused by the mixing of liquids flowing into the fluid valve.

[0049] The implementation principle of the gas-liquid testing equipment for fluid valves in an embodiment of the present application is as follows: the fluid valve is connected to the fixed frame assembly 6, and then the fixed frame assembly 6 is moved to an appropriate position, and then the sealing tube assembly 4 is connected to the valve port corresponding to the fluid valve. One of the sealing tube assemblies 4 is opened, and the fluid valve is tested for air tightness through the gas supply assembly 2. Subsequently, the corresponding sealing tube assembly 4 is opened according to the liquid flow path that needs to be tested by the fluid valve, and then the liquid supply assembly 3 performs a fluid tightness test on the fluid valve. Therefore, this solution can perform air tightness tests and fluid tightness tests on the fluid valve on the fixed frame assembly 6 in turn, and thus this solution simplifies the fluid valve air tightness test and fluid tightness test process.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A gas-liquid testing device for a fluid valve, characterized by: The invention comprises an operating table (1), a gas supply assembly (2), a liquid supply assembly (3) and a plugging pipe assembly (4), wherein the gas supply assembly (2) and the liquid supply assembly (3) are both connected to the operating table (1), a plurality of plugging pipe assemblies (4) are provided, the plugging pipe assembly (4) comprises a valve connection end (42) and an equipment connection end (43), the equipment connection end (43) is connected to the gas supply assembly (2) and the liquid supply assembly (3), the valve connection end (42) is used to connect a fluid valve, a switch element (41) is provided in the plugging pipe assembly (4), and the switch element (41) is used to control the flow of fluid between the valve connection end (42) and the equipment connection end (43); A flexible diaphragm (44) is provided on the inner wall of the blocking tube assembly (4), and the flexible diaphragm (44) is used to separate the gas supplied by the gas supply assembly (2) and the liquid supplied by the liquid supply assembly (3), or to separate the liquids supplied by the two liquid supply assemblies (3). Under the pressure of the fluid, the flexible diaphragm (44) can be in close contact with the blocking tube assembly (4); It also includes a driving assembly (5), the driving assembly (5) is connected to the operating table (1), the blocking tube assembly (4) is movably connected to the operating table (1), and the driving assembly (5) is used to drive the blocking tube assembly (4) to move; It also includes a fixing frame assembly (6), the fixing frame assembly (6) is slidably connected to the operating table (1), and the fixing frame assembly (6) is used to fix the flow valve; The fixing frame assembly (6) includes a sliding connection (61) and a valve fixing member (62), wherein the valve fixing member (62) is used to fix the flow valve, and the valve fixing member (62) is connected to the sliding connection member (61); two mutually parallel guide rails (11) are provided on the operating table (1), one end of the sliding connection member (61) is slidably connected to one of the guide rails (11), and the other end of the sliding connection member (61) is slidably connected to the other guide rail (11), and the valve fixing member (62) is arranged between the two guide rails (11).

2. The gas-liquid testing device for a fluid valve according to claim 1, characterized in that: The device connection end (43) of one of the blocking tube assemblies (4) is connected to at least two of the liquid supply assemblies (3).

3. The gas-liquid testing device for a fluid valve according to claim 1, characterized in that: The driving assembly (5) comprises a driving cylinder (51) and a connecting block (52); the driving cylinder (51) is provided with a plurality of piston rods; one end of the connecting block (52) is connected to the blocking tube assembly (4); and the other end of the connecting block (52) is connected to the piston rod of the driving cylinder (51).

4. The gas-liquid testing device for a fluid valve according to claim 3, characterized in that: The blocking tube assembly (4) is connected to the exact center of the end face of the connecting block (52), the piston rods of the driving cylinders (51) are arranged in a row perpendicular to the moving direction of the blocking tube assembly (4), and the distance between the piston rods of the first and last two driving cylinders (51) is greater than the outer diameter of the blocking tube assembly (4).

5. The gas-liquid testing device for a fluid valve according to claim 1, characterized in that: The switch element (41) is arranged closely against the valve connection end (42).

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