Testing device for pneumatic element of speed regulating valve

Abstract

The invention relates to the technical field of speed regulating valve testing, in particular to a speed regulating valve pneumatic element testing device which comprises a testing base, the upper end of the testing base is sunken downwards to be provided with a butt joint groove, an air outlet pipeline is fixedly installed at the bottom of the butt joint groove, and a sealing gasket is installed at the upper end of the air outlet pipeline. The upper end of the testing base is fixedly connected with an L-shaped fixing seat, an air cylinder is fixedly installed at the upper end of the L-shaped fixing seat, a lifting plate is fixedly installed at the end of an inner rod of the air cylinder, a supporting transverse plate is arranged below the lifting plate, and the supporting transverse plate is connected with the lifting plate through a buffering mechanism. The speed regulating valve body is placed between the two clamping seats, the two clamping seats get close to each other under the action of the elastic force of the clamping spring until the two clamping seats are clamped on the side face of the speed regulating valve body, the two fan-shaped clamping blocks are clamped on the side face of an insertion pipe port of the speed regulating valve body, and the speed regulating valve body is clamped and positioned through the clamping mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of speed regulating valve testing, in particular to a speed regulating valve pneumatic element testing device. BACKGROUND

[0002] The speed regulating valve is composed of a constant differential pressure reducing valve and a throttle valve in series, which automatically compensates for load changes to maintain a constant pressure difference before and after the throttle valve and ensure stable flow. The use method of the pneumatic cylinder speed regulating valve mainly includes adjusting the rising and falling speed of the pneumatic cylinder, controlling the air flow speed by adjusting the size of the throttle port of the speed regulating valve, and thus achieving precise control of the movement speed of the pneumatic cylinder. Some speed regulating valves are divided into exhaust throttling type speed regulating valves and intake throttling type speed regulating valves, and the two ports of such speed regulating valves are respectively threaded ports and plug-in ports. In order to ensure the use quality of the speed regulating valve, it needs to be tested after being processed. When testing the speed regulating valve, the speed regulating valve needs to be fixed on the test station first, and then the two ends of the speed regulating valve are connected to the docking ports of the testing device, the gas is introduced into the speed regulating valve, the flow size at the outlet position of the speed regulating valve is observed, the valve stem is rotated to adjust the gas flow size of the speed regulating valve, and then the flow change at the outlet position of the speed regulating valve is observed, so as to realize the testing of the pneumatic element of the speed regulating valve.

[0003] In the process of testing the speed regulating valve, the valve body needs to be fixed first. The existing speed regulating valve fixing method is to fix the valve body on the test base first, and then connect the two ends of the speed regulating valve to the air inlet pipeline and the air outlet pipeline respectively, so that the gas source can introduce gas into the speed regulating valve. However, the existing fixing device has a complicated operation method, which is not conducive to the installation and disassembly of the speed regulating valve. Moreover, when the two ends of the speed regulating valve are connected to the air inlet pipeline and the air outlet pipeline, the accuracy and sealing of the connection cannot be guaranteed. Once leakage occurs at the connection between the two ends of the speed regulating valve and the air inlet pipeline and the air outlet pipeline, it will directly affect the accuracy of the speed regulating valve testing, which is not conducive to actual use. SUMMARY

[0004] The purpose of the present application is to provide a speed regulating valve pneumatic element testing device to solve the problems raised in the background.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a speed regulating valve pneumatic element testing device, comprising a test base, the upper end of the test base is recessed downward to form a docking groove, the bottom of the docking groove is fixedly installed with an air outlet pipeline, and the upper end of the air outlet pipeline is installed with a sealing pad. An L-shaped fixing seat is fixedly connected to the upper end of the test base. A cylinder is fixedly installed on the upper end of the L-shaped fixing seat. A lifting plate is fixedly installed at the end of the inner rod of the cylinder. A supporting horizontal plate is provided below the lifting plate. The supporting horizontal plate and the lifting plate are connected by a buffer mechanism. A clamping mechanism for clamping and positioning the speed control valve body is installed at the lower end of the supporting horizontal plate. A docking mechanism is provided below one end of the supporting horizontal plate. The docking mechanism docks with one port of the speed control valve body. An air sealing mechanism is installed on the docking mechanism. The other port of the speed control valve body is connected to the air outlet pipe.

[0006] As a further embodiment of the present invention, the buffer mechanism includes lifting slide rods that are symmetrically fixedly connected to the upper end of the support cross plate. A buffer spring is sleeved on the lifting slide rod. The upper end of the lifting slide rod passes through the lifting plate and is fixedly sleeved with a limit ring. The lifting slide rod and the lifting plate are slidably connected up and down. The two ends of the buffer spring abut against the lifting plate and the support cross plate, respectively. A guide plate is symmetrically fixedly connected to the upper end of the lifting plate. The upper end of the guide plate passes through the upper end of the L-shaped fixing seat and is slidably connected up and down to the upper end of the L-shaped fixing seat.

[0007] As a further embodiment of the present invention, the clamping mechanism includes a support frame symmetrically fixedly connected to the front and rear sides of the support plate. A clamping seat is symmetrically arranged between the two support frames. A guide rod is symmetrically fixedly connected to the upper and lower sides of the two clamping seats on opposite sides. The end of the guide rod away from the clamping seat passes through the adjacent support frame and is slidably connected to the support frame. A positioning handle is fixedly connected to the end of the guide rod away from the clamping seat. A clamping spring is sleeved on the guide rod. The two ends of the clamping spring abut against the support frame and the clamping seat, respectively. A fan-shaped clamping block is fixedly connected to the lower end of the two clamping seats. A pressing plate is symmetrically fixedly connected to the upper end of the test base.

[0008] As a further embodiment of the present invention, the docking mechanism includes an L-shaped movable seat slidably mounted on the lower end of a supporting horizontal plate. T-shaped grooves are symmetrically provided at the lower end of the supporting horizontal plate. T-shaped sliders are symmetrically fixedly mounted at the upper end of the L-shaped movable seat. The T-shaped sliders are slidably connected to the adjacent T-shaped grooves. A guide sleeve is inserted through the side of the L-shaped movable seat. An air intake pipe is installed at the bottom inner side of the L-shaped movable seat via a pipe fixing bracket. A circular groove is provided through the side of the L-shaped movable seat. A docking sleeve is fixedly fitted onto the outer side of the air intake pipe near the circular groove. The docking sleeve is inserted through the circular groove. An annular docking plate is fixedly connected to the inner end of the air intake pipe within the docking sleeve. A driving mechanism is symmetrically mounted on the front and rear sides of the L-shaped movable seat.

[0009] As a further embodiment of the present invention, a guide slide rod is fixedly connected to the lower end of the supporting horizontal plate, one end of the guide slide rod passes through the guide sleeve, and the guide sleeve and the guide slide rod are slidably connected left and right.

[0010] As a further embodiment of the present invention, the driving mechanism includes connecting plates symmetrically fixedly connected to the front and rear sides of the lifting plate, and transmission plates fixedly connected to the lower ends of the two connecting plates. The two transmission plates are symmetrically distributed on the front and rear sides of the L-shaped moving seat, and transmission grooves are opened on the sides of the two transmission plates. Fixing blocks are symmetrically fixedly installed on the front and rear sides of the L-shaped moving seat, and driving columns are fixedly connected to the sides of the two fixing blocks that are far apart from each other. The driving columns are inserted into the transmission grooves.

[0011] As a further embodiment of the present invention, the drive column is slidably connected to the transmission groove, and the transmission groove is composed of a vertical groove and an inclined groove.

[0012] As a further embodiment of the present invention, an installation groove is provided at one end of the air intake pipe near the docking sleeve. The air sealing mechanism includes a connecting air pipe fixedly installed in the installation groove. One end of the connecting air pipe passes downward through the air intake pipe and extends to the outside. An annular airbag is fixedly installed at the other end of the connecting air pipe. The inner cavity of the connecting air pipe communicates with the inner cavity of the annular airbag. The annular airbag is sleeved on the outside of the annular docking plate. An air guide pipe is installed at the lower end of the connecting air pipe. The other end of the air guide pipe is connected to a push-pull mechanism. The push-pull mechanism is installed at the upper end of the support cross plate.

[0013] As a further embodiment of the present invention, the push-pull mechanism includes an air cylinder fixedly mounted on the upper end of a support cross plate via a mounting bracket. A sealing cap is fixedly mounted on the upper end of the air cylinder. A piston rod is slidably mounted on the upper end of the sealing cap. The lower end of the piston rod extends downward into the inner cavity of the air cylinder and is fixedly connected to a piston head. The piston head is slidably connected to the inner wall of the inner cavity of the air cylinder. An upward push spring is sleeved on the piston rod. A pressure head is fixedly connected to the upper end of the piston rod. The two ends of the upward push spring abut against the sealing cap and the pressure head, respectively. The end of the air guide tube away from the connecting air pipe is fixedly connected to the lower end of the air cylinder.

[0014] The beneficial effects of this invention are: 1. During operation, first open the clamping mechanism and place the speed control valve body between the two clamping seats. Under the action of the clamping spring force, the two clamping seats move closer to each other until they clamp the sides of the speed control valve body. The two sector-shaped clamping blocks clamp the sides of the insertion port of the speed control valve body. The clamping mechanism clamps and positions the speed control valve body. The clamping mechanism allows for easy installation and removal of the speed control valve body. During testing, the extrusion plate firmly abuts against the positioning handle, ensuring that the clamping mechanism firmly clamps and positions the speed control valve body, guaranteeing the stability of the speed control valve body during testing and thus ensuring the accuracy of the speed control valve body test.

[0015] 2. The inner rod of the cylinder extends downward, causing the lifting plate to move downward. The lifting plate, through a buffer mechanism, causes the support plate to move downward. The support plate then causes the docking mechanism, clamping mechanism, and speed control valve body to move downward synchronously until the bottom of the L-shaped moving seat contacts the top of the test base. At this point, the insertion port of the speed control valve body is docked with the outlet pipe. The inner rod of the cylinder continues to drive the lifting plate downward, causing the drive mechanism to move the docking mechanism closer to the threaded port of the speed control valve body until docking is completed. The docking sleeve is then fitted onto the outside of the threaded port of the speed control valve body, and the annular docking plate is inserted into the inside of the threaded port of the speed control valve body. Simultaneously, the annular airbag is positioned between the annular docking plate and the inside of the threaded port. The docking of the threaded port and insertion port of the speed control valve body with the inlet and outlet pipes is automatic, which not only reduces the workload of the operators but also improves the accuracy of the docking.

[0016] 3. After the docking mechanism is docked with the threaded port of the speed control valve body, the drive column slides to the connection between the vertical groove and the inclined groove. The lower end of the lifting plate contacts the upper end of the pressure head, causing the inner rod of the cylinder to continue driving the lifting plate downward. The lifting plate pushes the pressure head downward, causing the pushing mechanism to inject gas into the gas-sealing mechanism. This causes the annular airbag to expand, making the inner wall of the annular airbag tightly contact the outer side of the annular docking plate. At the same time, the outer side of the annular airbag tightly contacts the inner wall of the threaded port, thus sealing the connection between the air intake pipe and the threaded port of the speed control valve body, preventing leakage during the test. The gas-sealing mechanism ensures a good seal between the threaded port of the speed control valve body and the air intake pipe, preventing leakage from affecting the accuracy of the test. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural view of the speed control valve pneumatic component testing device of the present invention; Figure 2 This is a cross-sectional view of the pneumatic component testing device for the speed control valve of the present invention. Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 5 This is a partial three-dimensional structural view of the speed control valve pneumatic component testing device of the present invention; Figure 6 This is a side sectional view of the supporting cross plate and clamping mechanism structure of the present invention; Figure 7 This is an exploded view of the test base, contact mechanism, and speed control valve body structure of the present invention. Figure 8This is an exploded view of the supporting cross plate, buffer mechanism, docking mechanism, and drive mechanism of the present invention. Figure 9 This is an exploded view of the docking mechanism, speed control valve body, air sealing mechanism, and push-pull mechanism of the present invention.

[0018] In the diagram: 1. Test base; 11. Docking groove; 12. Air outlet pipe; 13. Sealing gasket; 2. L-shaped fixed seat; 21. Cylinder; 22. Lifting plate; 23. Supporting cross plate; 24. T-shaped slide rail; 25. Lifting slide rod; 26. Buffer spring; 27. Limiting ring; 28. Guide slide rod; 29. ​​Guide plate; 3. L-shaped moving seat; 31. T-shaped slider; 32. Guide sleeve; 33. Pipe fixing bracket; 34. Air inlet pipe; 35. Mounting groove; 36. Docking sleeve; 37. 4. Annular docking plate; 5. Support frame; 6. Clamping seat; 7. Smooth rod; 8. Clamping spring; 9. Positioning handle; 10. Fan-shaped clamping block; 11. Speed ​​regulating valve body; 12. Extrusion plate; 13. Connecting plate; 24. Transmission plate; 35. Transmission groove; 46. Fixing block; 57. Drive column; 68. Air cylinder; 79. Sealing cap; 80. Piston rod; 81. Piston head; 92. Push spring; 103. Pressure head; 11. Air guide pipe; 22. Connecting air pipe; 33. Annular airbag. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1 to 9 The present invention provides a technical solution: a test device for pneumatic components of speed control valve, including a test base 1, a mating groove 11 is provided at the upper end of the test base 1, an air outlet pipe 12 is fixedly installed at the bottom of the mating groove 11, a sealing gasket 13 is installed at the upper end of the air outlet pipe 12, the lower end of the air outlet pipe 12 passes through the lower end of the test base 1, and the lower end of the air outlet pipe 12 is connected to the test pipe through a flange. An L-shaped fixing seat 2 is fixedly connected to the upper end of the test base 1. A cylinder 21 is fixedly installed on the upper end of the L-shaped fixing seat 2. The inner rod of the cylinder 21 extends downward through the upper end of the L-shaped fixing seat 2. A lifting plate 22 is fixedly installed at the end of the inner rod of the cylinder 21. A support plate 23 is provided below the lifting plate 22. The support plate 23 and the lifting plate 22 are connected by a buffer mechanism. A clamping mechanism for clamping and positioning the speed control valve body 46 is installed at the lower end of the support plate 23. A docking mechanism is provided below one end of the support plate 23. The docking mechanism docks with one port of the speed control valve body 46. An air sealing mechanism is installed on the docking mechanism. The other port of the speed control valve body 46 is connected to the air outlet pipe 12. A sealing gasket 13 is distributed between the port of the speed control valve body 46 and the air outlet pipe 12, thereby sealing the connection between the port of the speed control valve body 46 and the air outlet pipe 12.

[0021] Please see Figure 1 , Figure 2 and Figure 8 The buffer mechanism includes lifting slide rods 25 that are symmetrically fixedly connected to the upper end of the support plate 23. A buffer spring 26 is sleeved on the lifting slide rod 25. The upper end of the lifting slide rod 25 passes through the lifting plate 22 and is fixedly sleeved with a limit ring 27. The lifting slide rod 25 and the lifting plate 22 are slidably connected up and down. The two ends of the buffer spring 26 abut against the lifting plate 22 and the support plate 23 respectively. The buffer spring 26 applies elastic force to the support plate 23. The upper end of the lifting plate 22 is symmetrically fixedly connected to the upper end of the support plate 22. The upper end of the guide plate 29 passes through the upper end of the L-shaped fixed seat 2, and the guide plate 29 and the upper end of the L-shaped fixed seat 2 are slidably connected up and down.

[0022] The lifting plate 22 moves up and down by extending and retracting the inner rod of the cylinder 21. The lifting plate 22 drives the guide plate 29 to slide up and down along the L-shaped fixed seat 2, so that the lifting plate 22 can move up and down stably. The lifting plate 22 drives the support plate 23 to move up and down through the buffer mechanism.

[0023] Please see Figure 6 and Figure 7 The clamping mechanism includes a support frame 4 symmetrically fixedly connected to the front and rear sides of the support plate 23. A clamping seat 41 is symmetrically arranged between the two support frames 4. A smooth rod 42 is symmetrically fixedly connected to the side of the two clamping seats 41 that is far away from each other. The end of the smooth rod 42 away from the clamping seat 41 passes through the adjacent support frame 4 and is slidably connected to the support frame 4. A positioning handle 44 is fixedly connected to the end of the smooth rod 42 away from the clamping seat 41. A clamping spring 43 is sleeved on the smooth rod 42. The two ends of the clamping spring 43 abut against the support frame 4 and the clamping seat 41 respectively. The clamping spring 43 applies elastic force to the clamping seat 41. A fan-shaped clamping block 45 is fixedly connected to the lower end of the two clamping seats 41. A pressing plate 47 is symmetrically fixedly connected to the upper end of the test base 1.

[0024] Each of the two clamping seats 41 has a clamping groove on one side that is close to each other. The clamping groove is a curved groove, and the curvature of the curved groove is the same as the curvature of the side of the speed control valve body 46. The curvature of the inner side of the fan-shaped clamping block 45 is the same as the curvature of the insertion port of the speed control valve body 46. The two clamping seats 41 clamp the side of the speed control valve body 46, and the two fan-shaped clamping blocks 45 clamp the side of the insertion port of the speed control valve body 46. The speed control valve body 46 is firmly clamped and positioned by the cooperation of the two clamping seats 41 and the two fan-shaped clamping blocks 45.

[0025] When clamping and positioning the speed control valve body 46, first pull the two positioning handles 44 to move the two positioning handles 44 away from each other. The positioning handles 44 drive the clamping seat 41 to move synchronously through the light rod 42, so that the two clamping seats 41 move away from each other. When the clamping seat 41 moves, it squeezes the clamping spring 43. Place the speed control valve body 46 between the two clamping seats 41. Then release the pull on the positioning handle 44. Under the action of the clamping spring 43, the two clamping seats 41 will move closer to each other until the two clamping seats 41 clamp the side of the speed control valve body 46. The two fan-shaped clamping blocks 45 clamp the side of the insertion port of the speed control valve body 46. The speed control valve body 46 is clamped and positioned by the clamping mechanism.

[0026] When the support plate 23 moves downward, the clamping mechanism drives the speed control valve body 46 to move downward synchronously, so that the insertion port of the speed control valve body 46 is inserted into the docking groove 11, and at the same time the insertion port contacts the sealing gasket 13. The sealing gasket 13 makes the insertion port of the speed control valve body 46 sealed and connected to the upper end of the air outlet pipe 12. After the clamping mechanism moves downward a certain distance, the positioning handle 44 in the clamping mechanism slides downward along the side of the extrusion plate 47 until the insertion port of the speed control valve body 46 is connected with the air outlet pipe 12. At this time, the clamping mechanism stops moving downward. The extrusion plate 47 abuts and limits the positioning handle 44, preventing the positioning handle 44 from moving away from the support frame 4. This allows the clamping mechanism to firmly clamp and position the speed control valve body 46, preventing the speed control valve body 46 from shaking or moving during the test and ensuring the accuracy of the speed control valve body 46 test.

[0027] Please see Figure 2 , Figure 3 , Figure 8 and Figure 9The docking mechanism includes an L-shaped movable seat 3 slidably mounted on the lower end of a supporting horizontal plate 23. T-shaped grooves 24 are symmetrically provided at the lower end of the supporting horizontal plate 23. T-shaped sliders 31 are symmetrically fixedly mounted at the upper end of the L-shaped movable seat 3. The T-shaped sliders 31 are slidably connected to the adjacent T-shaped grooves 24. A guide sleeve 32 is inserted through the side of the L-shaped movable seat 3 and is fixedly connected to the L-shaped movable seat 3. An air intake pipe 34 is installed on the bottom inner side of the L-shaped movable seat 3 via a pipe fixing bracket 33. The lower end of the L-shaped movable seat 3 is fixedly connected to the bottom of the inner side of the L-shaped movable seat 3. The air intake pipe 34 is fixedly snapped into the inner side of the pipe fixing bracket 33. A circular groove is opened through the side of the L-shaped movable seat 3. A mating sleeve 36 is fixedly sleeved on the outer side of the air intake pipe 34 near the circular groove. The mating sleeve 36 is inserted through the circular groove and is connected to the L-shaped movable seat 3 by a flange. An annular mating plate 37 is fixedly connected to the end of the air intake pipe 34 inside the mating sleeve 36. A drive mechanism is symmetrically installed on the front and rear sides of the L-shaped movable seat 3.

[0028] After the clamping mechanism clamps and positions the speed control valve body 46, the central axis of the threaded port of the speed control valve body 46 is aligned with the central axis of the mating sleeve 36, that is, the threaded port of the speed control valve body 46 is coaxial with the mating sleeve 36.

[0029] A guide slide rod 28 is fixedly connected to the lower end of the supporting horizontal plate 23. One end of the guide slide rod 28 passes through the guide sleeve 32, and the guide sleeve 32 and the guide slide rod 28 are slidably connected left and right.

[0030] When the docking mechanism docks with the threaded port of the speed control valve body 46, the L-shaped moving seat 3 moves closer to the threaded port of the speed control valve body 46. The L-shaped moving seat 3 drives the intake pipe 34 and the docking sleeve 36 to move closer to the threaded port of the speed control valve body 46, so that the docking sleeve 36 is sleeved on the outside of the threaded port of the speed control valve body 46, and the annular docking plate 37 is inserted into the inside of the threaded port of the speed control valve body 46. An annular cavity is formed between the outer side of the annular docking plate 37 and the inner side of the threaded port, until one end of the intake pipe 34 is in close contact with the end of the threaded port of the speed control valve body 46, thereby completing the docking of the docking mechanism with the threaded port of the speed control valve body 46.

[0031] Please see Figure 1 , Figure 5 and Figure 8The drive mechanism includes connecting plates 5 symmetrically fixedly connected to the front and rear sides of the lifting plate 22. The lower ends of the two connecting plates 5 are fixedly connected to transmission plates 51. The two transmission plates 51 are symmetrically distributed on the front and rear sides of the L-shaped moving seat 3. The sides of the two transmission plates 51 are provided with transmission grooves 52. Fixing blocks 53 are symmetrically fixedly installed on the front and rear sides of the L-shaped moving seat 3. The two fixing blocks 53 are fixedly connected to the side of each other that is far apart from each other, and the driving columns 54 are inserted into the transmission grooves 52.

[0032] The drive column 54 is slidably connected to the transmission groove 52, which consists of a vertical groove and an inclined groove. The end of the inclined groove closer to the L-shaped moving seat 3 is higher than the end of the inclined groove farther from the L-shaped moving seat 3, and the upper end of the inclined groove is connected to the lower end of the vertical groove.

[0033] When the support plate 23 moves downward, it drives the L-shaped moving seat 3 to move downward simultaneously for a certain distance. The bottom of the L-shaped moving seat 3 first contacts the upper end of the test base 1. At this time, the test base 1 forms a resistance to the L-shaped moving seat 3, making the L-shaped moving seat 3 unable to continue moving downward. The L-shaped moving seat 3 forms a resistance to the support plate 23, making the support plate 23 unable to continue moving downward either. At this time, the lifting plate 22 continues to move downward. The lifting plate 22 slides downward along the lifting slide bar 25. At the same time, the lifting plate 22 squeezes the buffer spring 26. When the lifting plate 22 moves downward, it drives the transmission plate 51 to move downward synchronously through the connecting plate 5. The transmission groove 52 on the side of the transmission plate 51 slides along the drive column 54. In the initial position, the drive column 54 is at the bottom of the inclined groove. As the transmission groove 52 slides along the drive column 54, the drive column 54 slides from the bottom of the inclined groove to the top of the inclined groove. At this time, the transmission groove 52 drives the drive column 54 to move closer to the speed control valve body 46. The drive column 54 drives the L-shaped moving seat 3 to move closer to the speed control valve body 46 through the fixed block 53. When the drive column 54 slides to the connection between the vertical groove and the inclined groove, the transmission plate 51 continues to move downward, so that the drive column 54 slides into the vertical groove. At this time, the drive column 54 will not continue to move closer to the speed control valve body 46.

[0034] Please see Figure 2 , Figure 3 and Figure 9An installation groove 35 is provided at one end of the air intake pipe 34 near the docking sleeve 36. The air sealing mechanism includes a connecting air pipe 71 fixedly installed in the installation groove 35. One end of the connecting air pipe 71 passes downward through the air intake pipe 34 and extends to the outside. An annular airbag 72 is fixedly installed at the other end of the connecting air pipe 71. The inner cavity of the connecting air pipe 71 is connected to the inner cavity of the annular airbag 72. The annular airbag 72 is installed at the end of the air intake pipe 34 and is sleeved on the outside of the annular docking plate 37. An air guide pipe 7 is installed at the lower end of the connecting air pipe 71. The air guide pipe 7 is a flexible hose, and the setting of the air guide pipe 7 will not affect the normal movement of the docking mechanism and the drive mechanism. The inner cavity of the air guide pipe 7 is connected to the inner cavity of the connecting air pipe 71. The other end of the air guide pipe 7 is connected to the push-pull mechanism, which is installed at the upper end of the support cross plate 23.

[0035] Please see Figure 2 , Figure 4 and Figure 9 The push-pull mechanism includes an air cylinder 6 fixedly mounted on the upper end of the support plate 23 via a mounting bracket. A sealing cap 61 is fixedly mounted on the upper end of the air cylinder 6. A piston rod 62 is slidably mounted on the upper end of the sealing cap 61. The lower end of the piston rod 62 extends downward into the inner cavity of the air cylinder 6 and is fixedly connected to a piston head 63. The piston head 63 is slidably connected to the inner wall of the inner cavity of the air cylinder 6. An upward push spring 64 is sleeved on the piston rod 62. A pressure head 65 is fixedly connected to the upper end of the piston rod 62. The two ends of the upward push spring 64 abut against the sealing cap 61 and the pressure head 65 respectively, and the upward push spring 64 applies elastic force to the pressure head 65. The end of the air guide pipe 7 away from the connecting air pipe 71 is fixedly connected to the lower end of the air cylinder 6, and the inner cavity of the air guide pipe 7 is connected to the inner cavity of the air cylinder 6.

[0036] When the docking mechanism docks with the threaded port of the speed control valve body 46, the annular docking plate 37 is inserted into the inner side of the threaded port, and the annular airbag 72 is located between the annular docking plate 37 and the inner side of the threaded port.

[0037] As the lifting plate 22 moves downward, the drive mechanism drives the docking mechanism to move closer to the speed regulating valve body 46, so that the docking mechanism docks with the threaded port of the speed regulating valve body 46. When the drive column 54 slides to the connection between the vertical groove and the inclined groove, the docking mechanism completes the docking with the threaded port of the speed regulating valve body 46. Simultaneously, the lower end of the lifting plate 22 contacts the upper end of the pressure head 65. At this time, the lifting plate 22 continues to move downward, pushing the pressure head 65 downward. The pressure head 65 drives the piston rod 62 to insert into the air cylinder 6. At this time, the pressure head 65 squeezes the push spring 64, and the piston rod 62 drives the piston head 63 to slide downward along the inner cavity of the air cylinder 6, pushing the gas in the air cylinder 6 into the air guide pipe 7. The gas flows along the air guide pipe 7 into the connecting air pipe 71. The gas flows along the connecting air pipe 71 into the annular air bag 72, causing the annular air bag 72 to expand. This causes the inner wall of the annular air bag 72 to make close contact with the outer side of the annular docking plate 37, and at the same time, it causes the outer side of the annular air bag 72 to make close contact with the inner wall of the threaded port. This seals the connection between the air intake pipe 34 and the threaded port of the speed control valve body 46, preventing leakage during the test.

[0038] After the test is completed, the inner rod of cylinder 21 retracts, and the lifting plate 22 drives the drive mechanism to reset. When the drive mechanism moves upward, the lifting plate 22 releases the downward push of the pressure head 65. Under the action of the upper push spring 64, the pressure head 65 moves upward, causing the piston head 63 to move upward along the inner cavity of the air cylinder 6, drawing away the gas from the annular air bag 72, causing the annular air bag 72 to contract, thereby resetting the air sealing mechanism and the push-pull mechanism. When the drive mechanism moves upward, it drives the docking mechanism to reset, causing the docking mechanism to separate from the threaded port of the speed regulating valve body 46. At this time, the drive column 54 is at the bottom of the inclined groove. At this time, the upper end of the lifting plate 22 contacts the limiting ring 27. When the lifting plate 22 continues to move upward, it drives the limiting ring 27 to move upward, thereby causing the buffer mechanism to move upward. The buffer mechanism drives the supporting horizontal plate 23 to move upward. The supporting horizontal plate 23 drives the speed regulating valve body 46 to move upward through the clamping mechanism until the supporting horizontal plate 23 moves to the top and completes the reset. Then, pull the two positioning handles 44 to move them away from each other, so that the clamping mechanism releases its clamp on the speed regulating valve body 46. Thus, the speed regulating valve body 46, which has been tested, can be disassembled. The disassembly and installation of the speed regulating valve body 46 is simple and convenient.

[0039] Pressure sensors are installed before and after the test valve, that is, pressure sensors are installed on the inlet pipe 34 and the outlet pipe 12 to measure the pressure difference.

[0040] When it is necessary to test the airtightness of the speed control valve, close the speed control valve to prevent airflow from passing through it. Then, introduce high-pressure gas into one port of the speed control valve and observe whether the pressure gauge near that port changes, thereby testing the airtightness of the speed control valve.

[0041] A test pipe is installed on the air outlet pipe 12, and a flow meter or flow sensor is installed on the test pipe to test the flow rate of the speed control valve. An exhaust device is installed at the end of the test pipe to discharge the gas during the test.

[0042] Working principle: Initially, the inner rod of cylinder 21 is in the retracted state. At this time, the lifting plate 22, the support plate 23, the clamping mechanism and the docking mechanism are all at the top. At this time, the docking mechanism is far away from the clamping mechanism and will not hinder the installation and disassembly of the speed control valve body 46.

[0043] During operation, the clamping mechanism is first opened so that the two clamping seats 41 are far apart. The speed control valve body 46 is placed between the two clamping seats 41. Under the action of the clamping spring 43, the two clamping seats 41 are brought closer to each other until the two clamping seats 41 clamp the side of the speed control valve body 46. The two fan-shaped clamping blocks 45 clamp the side of the insertion port of the speed control valve body 46. The speed control valve body 46 is clamped and positioned by the clamping mechanism. The inner rod of cylinder 21 extends downward, and the inner rod drives the lifting plate 22 to move downward. The lifting plate 22 drives the support plate 23 to move downward through the buffer mechanism. The support plate 23 drives the docking mechanism, clamping mechanism and speed control valve body 46 to move downward synchronously until the bottom of the L-shaped moving seat 3 abuts against the upper end of the test base 1. At this time, the support plate 23 stops moving downward, and the insertion port of the speed control valve body 46 is docked with the air outlet pipe 12. At this time, the inner rod of cylinder 21 continues to drive the lifting plate 22 to move downward, and the lifting plate 22 drives the drive mechanism to move downward, so that the drive mechanism drives the docking mechanism to approach the threaded port of the speed control valve body 46 until docking is completed, so that the docking sleeve 36 is sleeved on the outside of the threaded port of the speed control valve body 46, and the annular docking plate 37 is inserted into the inside of the threaded port of the speed control valve body 46, while the annular airbag 72 is located between the annular docking plate 37 and the inside of the threaded port. After the docking mechanism is docked with the threaded port of the speed control valve body 46, the drive column 54 slides to the connection between the vertical groove and the inclined groove. The lower end of the lifting plate 22 contacts the upper end of the pressure head 65, causing the inner rod of the cylinder 21 to continue to drive the lifting plate 22 to move downward. The lifting plate 22 pushes the pressure head 65 downward, causing the pushing mechanism to inject gas into the gas sealing mechanism, thereby inflating the annular airbag 72. This causes the inner wall of the annular airbag 72 to make close contact with the outer side of the annular docking plate 37, and at the same time, the outer side of the annular airbag 72 to make close contact with the inner wall of the threaded port. This ensures a sealed connection between the air intake pipe 34 and the threaded port of the speed control valve body 46, preventing leakage during the test.

[0044] The clamping mechanism allows for easy installation and removal of the speed control valve body 46. During testing, the pressing plate 47 firmly abuts against the positioning handle 44, enabling the clamping mechanism to firmly clamp and position the speed control valve body 46, ensuring the stability of the speed control valve body 46 during testing, and thus ensuring the accuracy of the speed control valve body 46 test.

[0045] The threaded port and plug port of the speed control valve body 46 are automatically connected to the air inlet pipe 34 and the air outlet pipe 12, respectively. This not only reduces the burden on the staff, but also improves the accuracy of the connection. Furthermore, the air-sealing mechanism ensures a good seal between the threaded port of the speed control valve body 46 and the air inlet pipe 34, preventing leakage from affecting the accuracy of the test.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A testing device for pneumatic components of a speed control valve, comprising a testing base (1), characterized in that: The upper end of the test base (1) is recessed downward and has a docking groove (11). An air outlet pipe (12) is fixedly installed at the bottom of the docking groove (11), and a sealing gasket (13) is installed at the upper end of the air outlet pipe (12). The upper end of the test base (1) is fixedly connected to an L-shaped fixed seat (2), and a cylinder (21) is fixedly installed on the upper end of the L-shaped fixed seat (2). A lifting plate (22) is fixedly installed at the end of the inner rod of the cylinder (21). A support plate (23) is provided below the lifting plate (22). The support plate (23) and the lifting plate (22) are connected by a buffer mechanism. A clamping mechanism for clamping and positioning the speed control valve body (46) is installed at the lower end of the support plate (23). A docking mechanism is provided below one end of the support plate (23). The docking mechanism docks with one port of the speed control valve body (46). An air sealing mechanism is installed on the docking mechanism. The other port of the speed control valve body (46) is connected to the air outlet pipe (12).

2. The speed control valve pneumatic component testing device according to claim 1, characterized in that: The buffer mechanism includes a lifting slide rod (25) that is symmetrically fixedly connected to the upper end of the support plate (23). A buffer spring (26) is sleeved on the lifting slide rod (25). The upper end of the lifting slide rod (25) passes through the lifting plate (22) and is fixedly sleeved with a limit ring (27). The lifting slide rod (25) and the lifting plate (22) are slidably connected up and down. The two ends of the buffer spring (26) abut against the lifting plate (22) and the support plate (23) respectively. A guide plate (29) is symmetrically fixedly connected to the upper end of the lifting plate (22). The upper end of the guide plate (29) passes through the upper end of the L-shaped fixed seat (2), and the guide plate (29) and the upper end of the L-shaped fixed seat (2) are slidably connected up and down.

3. The speed control valve pneumatic component testing device according to claim 1, characterized in that: The clamping mechanism includes a support frame (4) symmetrically fixedly connected to the front and rear sides of the support plate (23). A clamping seat (41) is symmetrically arranged between the two support frames (4). A light rod (42) is symmetrically fixedly connected to the side of the two clamping seats (41) that is far away from each other. The end of the light rod (42) that is far away from the clamping seat (41) passes through the adjacent support frame (4) and is slidably connected to the support frame (4). A positioning handle (44) is fixedly connected to the end of the light rod (42) that is far away from the clamping seat (41). A clamping spring (43) is sleeved on the light rod (42). The two ends of the clamping spring (43) abut against the support frame (4) and the clamping seat (41) respectively. A fan-shaped clamping block (45) is fixedly connected to the lower end of the two clamping seats (41). A pressing plate (47) is symmetrically fixedly connected to the upper end of the test base (1).

4. The speed control valve pneumatic component testing device according to claim 1, characterized in that: The docking mechanism includes an L-shaped movable seat (3) that is slidably installed on the lower end of the support plate (23). The lower end of the support plate (23) is symmetrically provided with T-shaped grooves (24). The upper end of the L-shaped movable seat (3) is symmetrically fixedly installed with T-shaped sliders (31). The T-shaped sliders (31) are slidably connected to the adjacent T-shaped grooves (24) in the left and right directions. A guide sleeve (32) is inserted through the side of the L-shaped movable seat (3). An air intake pipe (34) is installed on the bottom of the inner side of the L-shaped movable seat (3) through a pipe fixing bracket (33). A circular groove is opened through the side of the L-shaped movable seat (3). A docking sleeve (36) is fixedly sleeved on the outer side of the air intake pipe (34) near the circular groove. The docking sleeve (36) is inserted through the circular groove. An annular docking plate (37) is fixedly connected to the end of the air intake pipe (34) inside the docking sleeve (36). A driving mechanism is symmetrically installed on the front and rear sides of the L-shaped movable seat (3).

5. The speed control valve pneumatic component testing device according to claim 4, characterized in that: The lower end of the support plate (23) is fixedly connected to a guide slide rod (28), one end of the guide slide rod (28) passes through the guide sleeve (32), and the guide sleeve (32) and the guide slide rod (28) are slidably connected left and right.

6. The speed control valve pneumatic component testing device according to claim 4, characterized in that: The driving mechanism includes connecting plates (5) symmetrically fixedly connected to the front and rear sides of the lifting plate (22). The lower ends of the two connecting plates (5) are fixedly connected to transmission plates (51). The two transmission plates (51) are symmetrically distributed on the front and rear sides of the L-shaped moving seat (3). The sides of the two transmission plates (51) are provided with transmission grooves (52). Fixed blocks (53) are symmetrically fixedly installed on the front and rear sides of the L-shaped moving seat (3). The two fixed blocks (53) are fixedly connected to the side away from each other with drive columns (54). The drive columns (54) are inserted into the transmission grooves (52).

7. The speed control valve pneumatic component testing device according to claim 6, characterized in that: The drive column (54) is slidably connected to the transmission groove (52), which is composed of a vertical groove and an inclined groove.

8. The speed control valve pneumatic component testing device according to claim 4, characterized in that: The intake pipe (34) has an installation groove (35) at one end near the docking sleeve (36). The air sealing mechanism includes a connecting air pipe (71) fixedly installed in the installation groove (35). One end of the connecting air pipe (71) passes through the intake pipe (34) downward and extends to the outside. The other end of the connecting air pipe (71) is fixedly installed with an annular airbag (72). The inner cavity of the connecting air pipe (71) is connected to the inner cavity of the annular airbag (72). The annular airbag (72) is sleeved on the outside of the annular docking plate (37). The lower end of the connecting air pipe (71) is equipped with a guide pipe (7). The other end of the guide pipe (7) is connected to a push-pull mechanism. The push-pull mechanism is installed on the upper end of the support cross plate (23).

9. A testing device for pneumatic components of a speed control valve according to claim 8, characterized in that: The push-pull mechanism includes an air cylinder (6) fixedly mounted on the upper end of the support plate (23) by a mounting bracket. A sealing cap (61) is fixedly mounted on the upper end of the air cylinder (6). A piston rod (62) is slidably mounted on the upper end of the sealing cap (61). The lower end of the piston rod (62) extends downward to the inner cavity of the air cylinder (6) and is fixedly connected to a piston head (63). The piston head (63) is slidably connected to the inner wall of the inner cavity of the air cylinder (6). An upward push spring (64) is sleeved on the piston rod (62). A pressure head (65) is fixedly connected to the upper end of the piston rod (62). The two ends of the upward push spring (64) abut against the sealing cap (61) and the pressure head (65) respectively. The end of the air guide pipe (7) away from the connecting air pipe (71) is fixedly connected to the lower end of the air cylinder (6).

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