Multifunctional valve pressure testing device

Abstract

The invention relates to the field of valve inspection and detection devices, in particular to a multifunctional valve pressure test device, and aims to solve the problems that a current valve pressure test machine is various in configuration type, single in function and poor in sealing effect. The pressure testing device comprises a rack, a fixed pressure testing assembly and a movable pressure testing assembly. The rack comprises a base, a stand column and a cross beam. The fixed pressure testing assembly comprises a fixed tensioning plate, a fixed telescopic cylinder, a fixed pulling plate, a fixed pulling disc, a plurality of fixed clamping jaws, a fixed pressure testing disc and a fixed pressure testing head; the movable pressure testing assembly comprises a movable tensioning plate, a movable telescopic cylinder, a movable pulling plate, a movable pulling disc fixedly connected with the movable pulling plate, a plurality of movable clamping jaws, a movable pressure testing disc and a movable pressure testing head; the fixed clamping jaw and the movable clamping jaw are oppositely arranged. The device is simple in structure, convenient to operate, wide in application range, good in sealing effect and capable of being used for low-pressure gas and high-pressure liquid sealing tests of valves of different specifications and sizes of various manufacturers.

Description

Technical Field

[0001] This invention relates to the field of valve inspection and testing devices, and specifically to a multifunctional valve pressure testing device. Background Technology

[0002] The sealing performance of a valve is its most important technical performance indicator. There are three main sealing points on a valve: the contact point between the sealing surfaces of the valve element and the valve seat; the mating point between the packing and the valve stem and stuffing box; and the connection point between the valve body and the valve cover. Leakage at the first point is called internal leakage, commonly known as incomplete closure, which affects the valve's ability to cut off the medium. For shut-off valves, internal leakage is unacceptable. Leakage at the latter two points is called external leakage, meaning the medium leaks from inside the valve to the outside. External leakage causes material loss, environmental pollution, and in severe cases, accidents. Therefore, valves must have reliable sealing performance.

[0003] Valves come in a wide variety of types and specifications, with significant differences in structure between different types. Therefore, different types of valves require different valve testing machines, and even valves of the same type may require testing machines of different sizes. Furthermore, the independent movement of each pressure claw in existing valve testing machines can lead to a lack of synchronization, thus affecting the valve end seal. Summary of the Invention

[0004] In order to solve the above-mentioned problems in the prior art, namely the problems of the current valve pressure testing machine having a wide variety of configurations, single functions, and poor sealing effect, the present invention provides a multifunctional valve pressure testing device.

[0005] This application discloses a multifunctional valve pressure testing device, which adopts the following technical solution:

[0006] A multifunctional valve pressure testing device includes a frame, a fixed pressure testing assembly, and a movable pressure testing assembly mounted on the frame;

[0007] The frame includes a base, a column fixedly connected to the base, and at least two parallel beams fixedly connected to the column.

[0008] The fixed pressure test assembly includes a fixed tension plate fixedly connected to the crossbeam, a fixed telescopic cylinder fixedly connected to the fixed tension plate, a fixed pull plate that is moved by the fixed telescopic cylinder and sleeved on the crossbeam, a fixed pull plate fixedly connected to the fixed pull plate, multiple fixed claws set on the fixed pull plate and moved together or apart by a fixed motor, a fixed pressure test plate fixedly connected to the crossbeam, and a fixed pressure test head fixedly connected to the fixed pressure test plate.

[0009] The fixed pressure test plate has multiple fixed strip holes for the fixed claws to pass through; the fixed pull plate and the fixed pull disc are arranged between the fixed tension plate and the fixed pressure test plate; one end of the fixed claw is connected to the fixed pull disc, and the other end protrudes from the fixed pressure test plate; the fixed pressure test plate and the fixed pressure test head have fixed pressure test liquid channels.

[0010] The movable pressure testing assembly includes a movable tensioning plate slidably connected to the crossbeam, a movable telescopic cylinder fixedly connected to the movable tensioning plate, a movable pull plate that is moved by the movable telescopic cylinder and sleeved on the crossbeam, a movable pull plate fixedly connected to the movable pull plate, multiple movable claws that are set on the movable pull plate and moved together or apart by a movable motor, a movable pressure testing plate slidably connected to the crossbeam, and a movable pressure testing head fixedly connected to the movable pressure testing plate;

[0011] The movable test pressure plate has multiple movable strip holes for the movable claws to pass through; the movable pull plate and the movable pull disc are arranged between the movable tension plate and the movable test pressure plate; one end of the movable claw is connected to the movable pull disc, and the other end extends out of the movable test pressure plate; the movable test pressure plate and the movable test pressure head have movable test pressure liquid channels.

[0012] The fixed jaw and the movable jaw are arranged opposite to each other.

[0013] By employing the above technical solution, the flange of the valve under test is placed between multiple fixed jaws. A fixed motor on the fixed pull plate drives the multiple fixed jaws to move synchronously towards the center, thereby achieving centered clamping of the valve under test. A fixed telescopic cylinder pulls the fixed pull plate and fixed jaws to move, thus simultaneously tightening the valve flange. At this time, one side of the valve's flow channel is in close contact with the fixed test head, forming a seal. Moving the movable telescopic cylinder, movable pull plate, and movable test plate causes the movable test head to seal the other side of the valve's flow channel. Similarly, the movable test assembly is used to center and clamp the valve under test. With the flow channels at both ends of the valve under test sealed, the valve is opened, and test liquid is injected into the valve cavity through the movable and fixed test liquid channels to perform valve shell and top seal tests. By designing fixed and movable test assemblies, valves of different lengths can be tested.

[0014] Preferably, the fixed pull plate has a fixed cavity inside, and a fixed turntable is arranged in the fixed cavity. The fixed motor drives the fixed turntable to rotate along the axis of the fixed turntable through gears. The fixed turntable has a fixed spiral protrusion on its plate surface, and the fixed pull plate has multiple fixed grooves that communicate with the fixed cavity. The fixed turntable is exposed in the fixed grooves.

[0015] The fixed claw includes a fixed slider and a fixed rod fixedly connected to the fixed slider; the fixed slider of the fixed claw is inserted into the fixed slide groove and engages with the fixed slide groove; the fixed slider has multiple fixed grooves; and when the fixed claw is in the fixed slide groove, the fixed groove of the fixed slider engages with the spiral protrusion on the fixed turntable to realize the threaded connection between the fixed claw and the fixed turntable.

[0016] The movable pull plate has a movable cavity inside, and a movable turntable is arranged in the movable cavity. The movable motor drives the movable turntable to rotate along the axis of the movable turntable through gears. The movable turntable has a movable spiral protrusion on its plate surface. The movable pull plate has multiple movable grooves, which are connected to the movable cavity. The movable turntable is exposed in the movable grooves.

[0017] The movable claw includes a movable slider and a movable rod fixedly connected to the movable slider; the movable slider of the movable claw is inserted into the movable slide groove and engages with the movable slide groove; the movable slider has multiple movable grooves; and when the movable claw is in the movable slide groove, the movable groove of the movable slider engages with the spiral protrusion on the movable turntable to realize the threaded connection between the movable claw and the fixed turntable.

[0018] The other end of the fixed rod passes through the fixed strip hole, and the other end of the movable rod passes through the movable strip hole.

[0019] By adopting the above technical solution, when the fixed turntable rotates, the spiral protrusions on the fixed turntable rotate with it, causing the fixed claws to slide along the length of the fixed slide groove. When the fixed turntable rotates clockwise, multiple fixed claws move away from the center of the fixed pull plate; when the fixed turntable rotates counterclockwise, multiple fixed claws move closer to the center of the fixed pull plate.

[0020] As the movable turntable rotates, the spiral protrusions on it rotate with the turntable, causing the movable claws to slide along the length of the movable groove. When the movable turntable rotates clockwise, multiple movable claws move away from the center of the movable pull plate; when the movable turntable rotates counterclockwise, multiple movable claws move closer to the center of the movable pull plate.

[0021] Preferably, a fixed pull block is fixedly connected to the other end of the fixed rod, and a movable pull block is fixedly connected to the other end of the movable rod.

[0022] By adopting the above technical solution, the fixing block can be locked onto the flange of the valve with the flange, which facilitates the fixing of the pressure testing component and the moving of the pressure testing component to fix the valve under test in the center, thereby facilitating the testing of the valve under test.

[0023] Preferably, the fixed test head is made of an elastic material; the movable test head is made of an elastic material.

[0024] By adopting the above technical solution, it becomes easier for both fixed and movable test heads to block the flow passage of the valve under test.

[0025] Preferably, the side of the fixed test head that protrudes from the fixed test plate is a conical surface; the side of the movable test head that protrudes from the movable test plate is a conical surface.

[0026] By adopting the above technical solution, the fixed test head and the moving test head can seal the flow channel openings of different sizes, thereby improving the test range.

[0027] Preferably, an adjusting plate is fitted onto the crossbeam and fixedly connected to the crossbeam. The adjusting plate is fixedly connected to the side of the movable telescopic cylinder opposite to the fixed claw, and an adjusting telescopic cylinder is fixedly connected to the adjusting plate. The piston rod of the adjusting telescopic cylinder is fixedly connected to the movable tensioning plate. The moving test pressure assembly is moved on the crossbeam by adjusting the telescopic cylinder.

[0028] Preferably, a spacer is fitted on the crossbeam, and the movable tension plate, movable test plate, and movable pull plate are fitted on the spacer, and the movable tension plate and movable test plate are fixedly connected to the spacer.

[0029] Preferably, a water tank is also placed on the base, and a lifting and telescopic cylinder is installed around the water tank. The lifting and telescopic cylinder controls the water tank to rise and fall. After the water tank is raised, the test liquid in the water tank will cover the valve body to be tested, which is held by the fixed test component and the moving test component.

[0030] By adopting the above technical solution, after the water tank is raised, the test liquid in the water tank can cover the valve body to be tested, which is held by the fixed test component and the moving test component, and immerse the valve in water, so that the low-pressure gas sealing test of the valve can be carried out.

[0031] Preferably, the spacer is fitted with a locking nut that is threadedly connected to the spacer and clamps the movable tensioning plate and the movable test pressure plate.

[0032] Preferably, a fixing plate is fixedly connected to the column, and two fixing plates are provided, with the crossbeam arranged between the two fixing plates.

[0033] The beneficial effects of this invention are:

[0034] (1) The present invention adopts a horizontal structure, which can realize the central clamping and synchronous pressing of different valves. The valve inlet and outlet ends are linearly sealed by the fixed test head and the moving test head cone. At the same time, an automatic lifting water tank is designed to realize the low-pressure gas and high-pressure liquid sealing test of valves of different types and specifications.

[0035] (2) The present invention has a simple structure, is easy to operate, has a wide range of applications, and has a good sealing effect. It can be used for low-pressure gas and high-pressure liquid sealing tests of valves of different specifications and sizes from various manufacturers. Attached Figure Description

[0036] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0037] Figure 1 This is a schematic diagram of the multifunctional valve pressure testing device in this embodiment;

[0038] Figure 2 This is a top view of the multifunctional valve pressure testing device in this embodiment;

[0039] Figure 3 This is a schematic diagram of the rack in this embodiment;

[0040] Figure 4 This is a schematic diagram showing the connection between the fixed pressure testing component and the crossbeam in this embodiment;

[0041] Figure 5 This is a schematic diagram of the fixing claws installed on the fixing pull plate in this embodiment;

[0042] Figure 6 This is a schematic diagram of the fixed turntable installed in the fixed pull plate in this embodiment;

[0043] Figure 7 This is a schematic diagram of the fixed pressure test plate in this embodiment;

[0044] Figure 8 This is a schematic diagram of the structure of the fixed test head in this embodiment;

[0045] Figure 9 This is a schematic diagram showing the connection between the movable pressure testing component and the crossbeam in this embodiment;

[0046] Figure 10 This is a schematic diagram of the fixed claws installed on the movable pull plate in this embodiment;

[0047] Figure 11 This is a schematic diagram of the fixed turntable installed in the movable pull plate in this embodiment;

[0048] Figure 12 This is a schematic diagram of the moving test plate in this embodiment;

[0049] Figure 13 This is a schematic diagram of the structure of the movable test head in this embodiment.

[0050] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Base; 12. Column; 13. Fixing plate; 131. Horizontal plate; 132. Vertical plate; 14. Crossbeam; 2. Fixing test pressure assembly; 21. Fixing tension plate; 22. Fixing telescopic cylinder; 23. Fixing pull plate; 24. Fixing pull plate; 241. Fixing cavity; 242. Fixing turntable; 243. Fixing spiral protrusion; 244. Fixing slide groove; 25. Fixing claw; 251. Fixing slider; 252. Fixing rod; 253. Fixing pull block; 254. Fixing groove; 26. Fixing motor; 27. Fixing test pressure plate; 271. Fixing strip hole; 28. Fixing test head; 29. 1. Fixed test pressure liquid channel; 3. Moving test pressure assembly; 31. Moving tension plate; 32. Moving telescopic cylinder; 33. Moving pull plate; 34. Moving pull plate; 341. Moving cavity; 342. Moving turntable; 343. Moving spiral protrusion; 344. Moving slide; 35. Moving claw; 351. Moving slider; 352. Moving rod; 353. Moving pull block; 354. Moving groove; 36. Moving motor; 37. Moving test pressure plate; 371. Moving strip hole; 38. Moving test pressure head; 39. Moving test pressure liquid channel; 4. Adjusting plate; 5. Adjusting telescopic cylinder; 6. Spacer; 7. Water tank; 8. Lifting telescopic cylinder. Detailed Implementation

[0051] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0052] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0053] This invention provides a multifunctional valve pressure testing device, with reference to... Figure 1 , Figure 2 The multi-functional valve pressure testing device includes a frame 1, a fixed pressure testing component 2 mounted on the frame 1, and a movable pressure testing component 3.

[0054] Reference Figure 2 , Figure 3 The frame 1 includes a base 11 disposed on the ground, and four uprights 12 are fixedly connected to the base 11 at its four corners. Two fixing plates 13 are fixedly connected to each upright 12, each fixing plate 13 being fixedly connected to two uprights 12, and the two fixing plates 13 are arranged in parallel. Two crossbeams 14 are fixedly connected between the two fixing plates 13, and the two crossbeams 14 are arranged in parallel.

[0055] The fixing plate 13 includes a horizontal plate 131 and a vertical plate 132 that is vertically fixedly connected to the horizontal plate 131. The fixing plate 13 is an L-shaped plate. The horizontal plate 131 is arranged horizontally and fixedly connected to the end of the column 12. The vertical plate 132 is arranged vertically, and there is a gap between the vertical plate 132 and the column 12. When the fixing plate 13 is installed on the column 12, the vertical plates 132 on the two fixing plates 13 are arranged opposite to each other. The crossbeam 14 is fixedly connected to the vertical plate 132.

[0056] The fixed pressure testing assembly 2 and the movable pressure testing assembly 3 are arranged on the crossbeam 14. The fixed pressure testing assembly 2 and the movable pressure testing assembly 3 are arranged in the form of fixed plate 13-fixed pressure testing assembly 2-movable pressure testing assembly 3-fixed plate 13.

[0057] Reference Figure 4 The fixed pressure testing assembly 2 includes a fixed tension plate 21, which is sleeved on two crossbeams 14 and fixedly connected to them. A fixed telescopic cylinder 22 is fixedly connected to the fixed tension plate 21. The fixed telescopic cylinder 22 is horizontally arranged, and its piston rod passes through the fixed tension plate 21. The fixed telescopic cylinder 22 is located on the side of the fixed tension plate 21 opposite to the movable pressure testing assembly 3. A fixed pull plate 23 is sleeved on the crossbeams 14, which is slidably connected to the two crossbeams 14 and fixedly connected to the piston rod of the fixed telescopic cylinder 22. The fixed pull plate 23 is controlled by the fixed telescopic cylinder 22 to slide along the length of the crossbeams 14. A fixed pull plate 24 is fixedly connected to the side of the fixed pull plate 23 away from the fixed telescopic cylinder 22. Multiple fixed claws 25 are installed on the fixed pull plate 24 and are slidably connected to it. A fixed motor 26 is fixedly connected to the fixed pull plate 24 and controls the movement of the multiple fixed claws 25 on the fixed pull plate 24.

[0058] Specifically, refer to Figure 5 , Figure 6 The fixed pull plate 24 has a fixed cavity 241 inside, and a fixed turntable 242 is arranged in the fixed cavity 241. The fixed motor 26 drives the fixed turntable 242 to rotate along the axis of the fixed turntable 242 through gears. A fixed spiral protrusion 243 is provided on the surface of the fixed turntable 242, and the fixed spiral protrusion 243 is arranged on the side of the fixed turntable 242 opposite to the fixed telescopic cylinder 22. Multiple fixed sliding grooves 244 are provided on the fixed pull plate 24. The fixed sliding grooves 244 are T-shaped grooves and communicate with the fixed cavity 241. The fixed turntable 242 is exposed in the fixed sliding grooves 244. The multiple fixed sliding grooves 244 are arranged at equal intervals along the circumference of the fixed pull plate 24.

[0059] The fixed claw 25 includes a fixed slider 251, a fixed rod 252 fixedly connected to the fixed slider 251, and a fixed pull block 253 fixedly connected to one end of the fixed rod 252; the fixed slider 251 and the fixed pull block 253 are arranged at both ends of the fixed rod 252. The fixed slider 251 of the fixed claw 25 is inserted into the fixed slide groove 244 and engages with the fixed slide groove 244. The fixed slider 251 has multiple fixed grooves 254. When the fixed claw 25 is in the fixed slide groove 244, the fixed grooves 254 of the fixed slider 251 engage with the spiral protrusions on the fixed turntable 242 to achieve a threaded connection between the fixed claw 25 and the fixed turntable 242. When the fixed turntable 242 rotates, the spiral protrusions on the fixed turntable 242 rotate with the fixed turntable 242, causing the fixed claw 25 to slide along the length direction of the fixed slide groove 244. When the fixed turntable 242 rotates clockwise, multiple fixed claws 25 move away from the center of the fixed pull plate 24; when the fixed turntable 242 rotates counterclockwise, multiple fixed claws 25 move closer to the center of the fixed pull plate 24.

[0060] Reference Figure 4 , Figure 7 A fixed test pressure plate 27 is fitted onto the crossbeam 14 and fixedly connected to the crossbeam 14. The fixed test pressure plate 27 is arranged on the side of the fixed pull plate 24 away from the fixed telescopic cylinder 22. The fixed pull plate 24 has multiple fixed strip holes 271, which are aligned with the fixed slide groove 244. The fixed claw 25 passes through the fixed test pressure plate 27. When the fixed claw 25 is installed, the fixed rod 252 is arranged in the fixed strip hole 271, the fixed slider 251 is connected to the fixed pull plate 24, and the fixed pull block 253 and the fixed slider 251 are arranged on both sides of the fixed test pressure plate 27.

[0061] Reference Figure 4 , Figure 8 A fixed test head 28 is fixedly connected to the fixed test plate 27. One side of the fixed test head 28 protrudes from the fixed test plate 27, and this protruding side is conical. When the fixed test head 28 is installed on the fixed test plate 27, a fixed test liquid channel 29 is provided on both the fixed test plate 27 and the fixed test head 28. The fixed test liquid channel 29 is connected to a test liquid pipeline. When the valve to be tested is installed on the fixed test assembly 2, the fixed test head 28 is inserted into the flow channel opening on one side of the valve to be tested. The fixed test liquid channel 29 is connected to the valve to be tested through the fixed test plate 27 and the fixed test head 28. Test liquid is injected into the valve to be tested to test its sealing performance.

[0062] Reference Figure 9The movable pressure testing assembly 3 includes a movable tension plate 31, which is sleeved on two crossbeams 14 and slidably connected to the crossbeams 14. A movable telescopic cylinder 32 is fixedly connected to the movable tension plate 31. The movable telescopic cylinder 32 is horizontally arranged, and its piston rod passes through the movable tension plate 31. The movable telescopic cylinder 32 is arranged on the side of the movable tension plate 31 opposite to the movable pressure testing assembly 3. A movable pull plate 33 is sleeved on the crossbeams 14 and slidably connected to the two crossbeams 14. The movable pull plate 33 is fixedly connected to the piston rod of the movable telescopic cylinder 32, and the movable pull plate 33 is controlled by the movable telescopic cylinder 32 to slide along the length of the crossbeams 14. A movable pull plate 34 is fixedly connected to the side of the movable pull plate 33 away from the movable telescopic cylinder 32. Multiple movable claws 35 are installed on the movable pull plate 34 and are slidably connected to it. A movable motor 36 is fixedly connected to the movable pull plate 34 and controls the movement of the multiple movable claws 35 on the movable pull plate 34.

[0063] Specifically, refer to Figure 10 , Figure 11 The movable pull plate 34 has a movable cavity 341 inside, and a movable turntable 342 is arranged in the movable cavity 341. The movable motor 36 drives the movable turntable 342 to rotate along its axis via gears. A movable spiral protrusion 343 is provided on the surface of the movable turntable 342, and the movable spiral protrusion 343 is arranged on the side of the movable turntable 342 opposite to the movable telescopic cylinder 32. Multiple movable sliding grooves 344 are provided on the movable pull plate 34. The movable sliding grooves 344 are T-shaped grooves and communicate with the movable cavity 341. The movable turntable 342 is exposed in the movable sliding grooves 344. The multiple movable sliding grooves 344 are arranged at equal intervals along the circumference of the movable pull plate 34.

[0064] The movable claw 35 includes a movable slider 351, a movable rod 352 fixedly connected to the movable slider 351, and a movable pull block 353 fixedly connected to one end of the movable rod 352; the movable slider 351 and the movable pull block 353 are arranged at both ends of the movable rod 352. The movable slider 351 of the movable claw 35 is inserted into the movable slide groove 344 and engages with the slide groove 344. The movable slider 351 has multiple movable grooves 354. When the movable claw 35 is in the slide groove 344, the movable grooves 354 of the movable slider 351 engage with the spiral protrusions on the movable turntable 342 to achieve a threaded connection between the movable claw 35 and the movable turntable 342. When the movable turntable 342 rotates, the spiral protrusions on the movable turntable 342 rotate with the movable turntable 342, causing the movable claw 35 to slide along the length direction of the movable slide groove 344. When the movable turntable 342 rotates clockwise, multiple movable claws 35 move away from the center of the movable pull plate 34; when the movable turntable 342 rotates counterclockwise, multiple movable claws 35 move closer to the center of the movable pull plate 34.

[0065] Reference Figure 9 , Figure 12 A movable test pressure plate 37 is fitted onto the crossbeam 14 and slidably connected to the crossbeam 14. The movable test pressure plate 37 is arranged on the side of the movable pull plate 34 away from the movable telescopic cylinder 32. The movable pull plate 34 has multiple movable strip holes 371, which are aligned with the movable slide groove 344. The movable claw 35 passes through the movable test pressure plate 37. When the movable claw 35 is installed, the movable rod 352 is arranged in the movable strip hole 371, the movable slider 351 is connected to the movable pull plate 34, and the movable pull block 353 and the movable slider 351 are arranged on both sides of the movable test pressure plate 37.

[0066] Reference Figure 9 , Figure 13 A movable test head 38 is fixedly connected to the movable test plate 37. One side of the movable test head 38 protrudes from the movable test plate 37, and this protruding side is conical. When the movable test head 38 is installed on the movable test plate 37, a movable test liquid channel 39 is provided on both the movable test plate 37 and the movable test head 38. The movable test liquid channel 39 is connected to a test liquid pipeline. When the valve to be tested is installed on the movable test assembly 3, the movable test head 38 is inserted into the flow channel on one side of the valve to be tested. The movable test liquid channel 39 is connected to the valve to be tested through the movable test plate 37 and the movable test head 38. Test liquid is injected into the valve to be tested to test its sealing performance.

[0067] When the fixed test pressure assembly 2 and the movable test pressure assembly 3 are installed on the crossbeam 14, the fixed claw 25 and the movable claw 35 are arranged opposite to each other. Both the fixed test pressure head 28 and the movable test pressure head 38 are made of elastic material.

[0068] During testing, one side of the valve to be tested is connected to the fixed pressure testing assembly 2. Then, the position of the movable pressure testing assembly 3 is adjusted to connect the movable pressure testing assembly 3 to the valve to be tested. Specifically, the flow port on one side of the valve to be tested is first arranged between multiple fixed clamps 25. The position of the multiple fixed clamps 25 is adjusted to clamp the pipe wall of the valve to be tested, and the flow port of the valve to be tested is placed on the fixed pressure testing head 28, so that the fixed pressure testing head 28 blocks the flow port on one side of the valve to be tested. Then, the fixed telescopic cylinder 22 pulls the fixed pull plate 24, so that the valve to be tested, which is clamped by the fixed clamps 25, is in close contact with the fixed pressure testing plate 27, maintaining the continuous sealing of the flow port on one side of the valve to be tested by the fixed pressure testing head 28, thus completing the connection between the valve to be tested and the fixed pressure testing assembly 2. Then, adjust the position of the movable test pressure assembly 3, block and clamp the flow port on the other side of the valve to be tested through the movable test pressure head 38 of the movable test pressure assembly 3, and then inject the test pressure liquid into the valve body to be tested through the movable test pressure liquid channel 39 and the fixed test pressure liquid channel 29, open the valve body to be tested, and perform the shell and top sealing test on the valve to be tested.

[0069] An adjusting plate 4 is fixedly connected to the crossbeam 14 and fitted onto it. The adjusting plate 4 is fixedly connected to the side of the movable telescopic cylinder 32 opposite to the fixed claw 25. An adjusting telescopic cylinder 5 is fixedly connected to the adjusting plate 4, and the piston rod of the adjusting telescopic cylinder 5 is fixedly connected to the movable tensioning plate 31. The movable pressure testing assembly 3 moves on the crossbeam 14 by adjusting the telescopic cylinder 5. A spacer 6 is fitted onto the crossbeam 14, and the movable tensioning plate 31, the movable pressure testing plate 37, and the movable pull plate 33 are fitted onto the spacer 6. The movable tensioning plate 31 and the movable pressure testing plate 37 are fixedly connected to the spacer 6. To achieve the fixed connection between the movable tensioning plate 31 and the movable pressure testing plate 37 and the spacer 6, a locking nut is installed on the spacer 6, which is threadedly connected to the spacer 6 and clamps the movable tensioning plate 31 and the movable pressure testing plate 37.

[0070] A water tank 7 is placed on the base 11. Multiple lifting and telescopic cylinders 8 are installed around the water tank 7, arranged vertically and fixedly connected to the edge of the water tank 7. The lifting and telescopic cylinders 8 control the raising and lowering of the water tank 7. When the water tank 7 is placed on the base 11, its two side edges are positioned between the vertical plate 132 and the column 12 on the fixed plate 13, and its width exceeds the width of the fixed pressure testing assembly 2 and the movable pressure testing assembly 3. After the water tank 7 is raised, the test liquid in the water tank 7 can cover the valve body to be tested, which is held by the fixed pressure testing assembly 2 and the movable pressure testing assembly 3, immersing the valve in water, thus enabling the low-pressure gas sealing test of the valve.

[0071] The method of using a multifunctional valve pressure testing device disclosed in this application is as follows:

[0072] For the valve under test with a flange, the flange is placed between multiple fixed jaws 25. The fixed motor 26 on the fixed pull plate 24 drives the multiple fixed jaws 25 to move synchronously towards the center, thereby achieving centered clamping of the valve under test. The fixed pull blocks 253 on the fixed jaws 25 also pull the flange, reinforcing the clamping of the valve under test. The fixed telescopic cylinder 22 pulls the fixed pull plate 23 and the fixed jaws 25 to move, thus simultaneously tightening the valve flange. At this time, one side of the valve's flow channel is in close contact with the fixed test head 28, forming a seal. Operating the adjusting telescopic cylinder 5 pushes the moving telescopic cylinder 32, the moving pull plate 33, and the moving test plate 37 to move, causing the moving test head 38 to seal the other side of the valve's flow channel. Similarly, following the previous operation, the moving test assembly 3 is used to center and clamp the valve under test. The flow channels at both ends of the valve under test are sealed. Opening the valve allows for the injection of test liquid into the valve cavity via the movable test liquid channel 39 and the fixed test liquid channel 29, enabling a valve shell and top seal test. Closing the valve and opening one end (i.e., releasing the fixed or movable clamp 25 on one side) allows for a gate seal test, or opening the test liquid channel connected to one end of the valve. Raising the water tank 7 and immersing the valve in the water allows for a low-pressure gas seal test.

[0073] For valves without flanges, the valve to be tested is placed between multiple fixed jaws 25, with the flow port of the valve to be tested tightly against the fixed test head 28. The fixed motor 26 on the fixed pull plate 24 drives the multiple fixed jaws 25 to move synchronously towards the center, thereby achieving centered clamping of the valve to be tested. The operating telescopic cylinder 5 pushes the moving telescopic cylinder 32, the moving pull plate 33, and the moving test plate 37 to move, so that the moving test head 38 seals the flow port on the other side of the valve to be tested. Similarly, the moving test assembly 3 is used to center and clamp the valve to be tested tightly according to the previous operation. The telescopic cylinder 5 will increase the thrust proportionally with the increase of the liquid pressure inside the valve to be tested, thereby ensuring that both ends of the valve are sealed without damaging the valve to be tested.

[0074] Open the valve under test and inject test liquid into the valve cavity through the movable test liquid channel 39 and the fixed test liquid channel 29 to perform a valve body and top seal test. Close the valve under test and open the movable test liquid channel 39 or the fixed test liquid channel 29 connected to one end of the valve to perform a gate seal test on one side of the valve. Then, change the opening and closing of the test liquid channels at both ends of the valve to perform a gate seal test on the other side of the valve. Raise the water tank 7 and immerse the valve in the water to perform a low-pressure gas seal test.

[0075] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0076] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A multifunctional valve pressure testing device, characterized in that: It includes a frame (1) and a fixed pressure testing assembly (2) and a movable pressure testing assembly (3) mounted on the frame (1); The frame (1) includes a base (11), a column (12) fixedly connected to the base (11), and at least two parallel beams (14) fixedly connected to the column (12); The fixed pressure test assembly (2) includes a fixed tension plate (21) fixedly connected to the crossbeam (14), a fixed telescopic cylinder (22) fixedly connected to the fixed tension plate (21), a fixed pull plate (23) moved by the fixed telescopic cylinder (22) and sleeved on the crossbeam (14), a fixed pull plate (24) fixedly connected to the fixed pull plate (23), multiple fixed claws (25) set on the fixed pull plate (24) and moved together or apart by a fixed motor (26), a fixed pressure test plate (27) fixedly connected to the crossbeam (14), and a fixed pressure test head (28) fixedly connected to the fixed pressure test plate (27). The fixed pressure test plate (27) has multiple fixed strip holes (271) for the fixed claws (25) to pass through; the fixed pull plate (23) and the fixed pull plate (24) are arranged between the fixed tension plate (21) and the fixed pressure test plate (27); one end of the fixed claw (25) is connected to the fixed pull plate (24), and the other end protrudes from the fixed pressure test plate (27); the fixed pressure test plate (27) and the fixed pressure test head (28) have fixed pressure test liquid channels (29); The movable pressure test assembly (3) includes a movable tension plate (31) slidably connected to the crossbeam (14), a movable telescopic cylinder (32) fixedly connected to the movable tension plate (31), a movable pull plate (33) driven by the movable telescopic cylinder (32) and sleeved on the crossbeam (14), a movable pull plate (34) fixedly connected to the movable pull plate (33), multiple movable claws (35) set on the movable pull plate (34) and driven by the movable motor (36) to converge or move away, a movable pressure test plate (37) slidably connected to the crossbeam (14), and a movable pressure test head (38) fixedly connected to the movable pressure test plate (37); The movable test pressure plate (37) has multiple movable strip holes (371) through which movable claws (35) pass; the movable pull plate (33) and the movable pull disc (34) are arranged between the movable tension plate (31) and the movable test pressure plate (37); one end of the movable claw (35) is connected to the movable pull disc (34), and the other end extends out of the movable test pressure plate (37); the movable test pressure plate (37) and the movable test pressure head (38) have movable test pressure liquid channels (39); The fixed claw (25) and the movable claw (35) are arranged opposite to each other.

2. The multifunctional valve pressure testing device according to claim 1, characterized in that: The fixed pull plate (24) has a fixed cavity (241) inside, and a fixed turntable (242) is arranged in the fixed cavity (241). The fixed motor (26) drives the fixed turntable (242) to rotate along the axis of the fixed turntable (242) through gears. The fixed turntable (242) has a fixed spiral protrusion (243) on its plate surface. The fixed pull plate (24) has multiple fixed grooves (244) that are connected to the fixed cavity (241). The fixed turntable (242) is exposed in the fixed grooves (244). The fixed claw (25) includes a fixed slider (251) and a fixed rod (252) fixedly connected to the fixed slider (251); the fixed slider (251) of the fixed claw (25) is inserted into the fixed slide groove (244) and engages with the fixed slide groove (244); the fixed slider (251) has multiple fixed grooves (254); when the fixed claw (25) is in the fixed slide groove (244), the fixed groove (254) of the fixed slider (251) engages with the spiral protrusion on the fixed turntable (242) to realize the threaded connection between the fixed claw (25) and the fixed turntable (242); The movable pull plate (34) has a movable cavity (341) inside, and a movable turntable (342) is arranged in the movable cavity (341). The movable motor (36) drives the movable turntable (342) to rotate along the axis of the movable turntable (342) through gears. The movable turntable (342) has a movable spiral protrusion (343) protruding on its plate surface. The movable pull plate (34) has multiple movable grooves (344) connected to the movable cavity (341). The movable turntable (342) is exposed in the movable grooves (344). The movable claw (35) includes a movable slider (351) and a movable rod (352) fixedly connected to the movable slider (351); the movable slider (351) of the movable claw (35) is inserted into the movable groove (344) and engages with the movable groove (344); the movable slider (351) has multiple movable grooves (354); when the movable claw (35) is in the movable groove (344), the movable groove (354) of the movable slider (351) engages with the spiral protrusion on the movable turntable (342) to realize the threaded connection between the movable claw (35) and the fixed turntable (242); The other end of the fixed rod (252) passes through the fixed strip hole (271), and the other end of the movable rod (352) passes through the movable strip hole (371).

3. The multifunctional valve pressure testing device according to claim 2, characterized in that: The other end of the fixed rod (252) is fixedly connected to a fixed pull block (253), and the other end of the movable rod (352) is fixedly connected to a movable pull block (353).

4. The multifunctional valve pressure testing device according to claim 1, characterized in that: The fixed test head (28) is made of elastic material; the movable test head (38) is made of elastic material.

5. The multifunctional valve pressure testing device according to claim 1, characterized in that: The fixed test head (28) has a conical surface on one side protruding from the fixed test plate (27); the movable test head (38) has a conical surface on one side protruding from the movable test plate (37).

6. The multifunctional valve pressure testing device according to claim 1, characterized in that: An adjusting plate (4) is fitted onto the crossbeam (14) and is fixedly connected to the crossbeam (14). The adjusting plate (4) is fixedly connected to the side of the movable telescopic cylinder (32) away from the fixed claw (25). An adjusting telescopic cylinder (5) is fixedly connected to the adjusting plate (4). The piston rod of the adjusting telescopic cylinder (5) is fixedly connected to the movable tensioning plate (31). The moving test pressure assembly (3) is moved on the crossbeam (14) by adjusting the telescopic cylinder (5).

7. The multifunctional valve pressure testing device according to claim 1, characterized in that: A spacer (6) is fitted on the crossbeam (14). The movable tension plate (31), the movable test plate (37), and the movable pull plate (33) are fitted on the spacer (6), and the movable tension plate (31) and the movable test plate (37) are fixedly connected to the spacer (6).

8. The multifunctional valve pressure testing device according to claim 1, characterized in that: A water tank (7) is also placed on the base (11). A lifting telescopic cylinder (8) is installed around the water tank (7). The lifting telescopic cylinder (8) controls the water tank (7) to rise and fall. After the water tank (7) is raised, the test liquid in the water tank (7) will cover the valve body to be tested held by the fixed test component (2) and the moving test component (3).

9. The multifunctional valve pressure testing device according to claim 7, characterized in that: The spacer (6) is fitted with a locking nut that is threadedly connected to the spacer (6) and clamps the movable tension plate (31) and the movable test plate (37).

10. The multifunctional valve pressure testing device according to claim 1, characterized in that: A fixing plate (13) is fixedly connected to the column (12). There are two fixing plates (13), and the crossbeam (14) is arranged between the two fixing plates (13).

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