A performance detection device and method for valve actuator

Abstract

The invention discloses a performance detection device and method for a valve actuator, and relates to the field of actuator detection technology, including a frame, a connecting component, and a detection component. The detection component includes a plane groove opened on the surface of the connecting component. Two mounting plates are installed on one side of the connecting component. The inner wall of the mounting plate is slidably connected with a sliding rod. One end of the sliding rod is connected with a contact rod through a limit plate. The contact rod contacts the plane groove. A telescopic spring is sleeved on the outer periphery of the sliding rod. When the fatigue of the pneumatic actuator is detected, the air pump is started, and the pneumatic actuator is inflated through the ventilation pipe to drive its internal transmission mechanism to move, thereby driving the opening and closing rod to rotate. The rotation of the opening and closing rod will push the contact rod to move, and the sliding rod is further driven to slide inside the mounting plate through the limit plate and squeeze the telescopic spring. The connecting plate moves with the sliding rod, and the fatigue of the opening and closing rod is judged by observing the position changes of the marking arrows and scale lines on the surface of the connecting plate.

Description

Technical Field

[0001] The present invention relates to the technical field of actuator detection, and in particular to a performance detection device and method for a valve actuator. Background Art

[0002] Valve pneumatic actuator is an important industrial automation equipment. It uses compressed air as a power source to drive the opening, closing or adjustment of the valve. Its working principle is mainly based on the energy conversion mechanism of compressed air: when compressed air is introduced into the actuator, the gas force will push the piston to produce a corresponding displacement. Subsequently, this displacement is transmitted to the valve stem of the valve through a precisely designed transmission mechanism, thereby driving the valve stem to move and achieve precise control of the valve.

[0003] In industrial production, the performance stability and durability of valve pneumatic actuators are crucial. In order to ensure that the actuator can maintain a stable operating state during long-term use, a key test is performed on it in the existing technology - fatigue test. This test is designed to simulate the cyclic load conditions that the valve may be subjected to during actual operation, so as to comprehensively evaluate the dynamic response capability and durability of the actuator.

[0004] Specifically, fatigue testing usually includes multiple cycles of operation, which simulate the switching or adjustment actions of the valve in actual work. By repeatedly performing these actions, inspectors can observe the performance changes of the actuator after long-term operation, thereby evaluating its fatigue life. This testing process is of great significance to ensuring the quality and reliability of valve pneumatic actuators, and helps reduce production interruptions and safety hazards caused by equipment failures. Summary of the invention

[0005] The purpose of the present invention is to propose a solution to solve the periodic load conditions that the valve may be subjected to during actual operation so as to comprehensively evaluate the dynamic response capability and durability of the actuator.

[0006] In order to achieve the above-mentioned object, the present invention adopts the following technical solution: a performance detection device for a valve actuator: comprising a frame, and further comprising: a connecting component and a detection component assembled at the bottom of the frame;

[0007] The detection component includes a plane groove opened on the surface of the connecting component, and two symmetrical mounting plates are installed on one side of the connecting component, and a plurality of sliding rods are slidably connected to the inner wall of the mounting plate, one end of the sliding rod is connected to a contact rod through a limit plate, and the contact rod is in contact with the plane groove, a telescopic spring is sleeved on the outer periphery of the sliding rod, the other end of the sliding rod is connected to a connecting plate, and a marking arrow is arranged on the top of the connecting plate, a plurality of mounting blocks are fixedly connected to one side of the sliding rod, and scale lines are opened on the surface of the mounting block, and an extension plate is connected to the top of one of the connecting plates;

[0008] The connecting assembly rotates, and the contact rod abutting against the plane groove drives the sliding rod to slide with the rotation, and pushes the connecting plate, and the position of the marking arrow and the scale line is observed to see whether there is a change.

[0009] As a further description of the above technical solution:

[0010] The connecting assembly includes an opening and closing rod rotatably connected to the inside of the frame body, and a connecting frame connected to the bottom of the frame body, the bottom of the connecting frame is connected to the valve body, the opening and closing rod passes through the connecting frame and extends into the valve body to connect with the valve core, and a measuring assembly is installed inside the connecting frame.

[0011] As a further description of the above technical solution:

[0012] The measuring assembly includes a plurality of arc plates fixedly connected to the inside of the connecting frame, and the bottoms of the plurality of arc plates are connected to a fixed disc, the inside of the fixed disc is provided with a plurality of slide grooves, and the inside of each slide groove is slidably connected to a sliding block, the bottom of the sliding block is connected to a transmission part, and the top of the fixed disc is connected to a measuring part.

[0013] As a further description of the above technical solution:

[0014] The transmission member includes a mounting rod connected to the bottom of the sliding block, and the mounting rod is connected to a connecting rod through an L-shaped sleeve plate on the periphery, the top of the connecting rod is connected to the circular plate, and each mounting rod and the bottom of the connecting rod are installed with a limit block.

[0015] As a further description of the above technical solution:

[0016] The measuring part includes a connecting rod connected to one side of the sliding block, the connecting rod is connected to the extension plate through an internal embedded groove, a moving block is installed on the top of the sliding block, and the top of the moving block is connected to a fixed plate, the inner wall of the moving block is fixedly connected to a welding frame, a positioning rod is connected between the inner walls of the welding frame, the positioning rod is rotatably connected to a rotating sleeve block through a sleeved torsion spring, and a toggle plate is installed on the outer periphery of the rotating sleeve block, and a warning member in contact with the toggle plate is installed inside the moving block.

[0017] As a further description of the above technical solution:

[0018] The surface of the fixed plate is provided with an inclined surface, and the surface of the shifting plate is provided with an inclined surface.

[0019] As a further description of the above technical solution:

[0020] The warning member includes a frame connected to the outside of the moving block, and an alarm light is connected to the inside of the frame, one end of the alarm light is connected to the power-on plate, and the inside of the moving block is slidably connected to a stop rod that contacts the toggle plate, and one end of the stop rod passes through the moving block and is connected to a conductive plate, and a battery is installed on one side of the conductive plate, and the battery and the conductive plate are electrically connected.

[0021] As a further description of the above technical solution:

[0022] The frame body comprises a mounting frame, a pneumatic actuator is mounted at the bottom of the mounting frame, an air pump is mounted at the top of the mounting frame, and a ventilation pipe is connected between the air pump and the pneumatic actuator.

[0023] As a further description of the above technical solution:

[0024] A performance detection method for a valve actuator comprises the following steps:

[0025] S01: Start the air pump, which performs an inflating operation through the vent pipe, so that the gas can smoothly flow into the interior of the pneumatic actuator along the vent pipe;

[0026] S02: When the gas flows into the interior of the pneumatic actuator, it drives the transmission mechanism inside the pneumatic actuator to move. This movement is transmitted through the transmission mechanism, further driving the opening and closing rod to rotate, and driving the valve core to open and close;

[0027] S03: The opening and closing rod rotates. The rotation of the opening and closing rod causes the contact rod to move in the plane groove, and drives the sliding rod to slide in the mounting plate through the limit plate. At the same time, the telescopic spring is squeezed, and the movement of the sliding rod drives the connecting plate to move. After multiple operations, the fatigue degree of the opening and closing rod can be judged by observing the position of the marking arrow and the scale line on the connecting plate;

[0028] S04: If the positions of the two scale lines are consistent, it means that the opening and closing rod is not fatigued. If the positions are inconsistent, there may be a fatigue problem. After the opening and closing rod has worked for a long time, it is opened, the telescopic spring is reset, and the contact rod and the sliding rod are pushed to reset. At this time, if the position of the opening and closing rod has not changed, the values ​​of the three marked arrows and the scale lines should be consistent. If the values ​​are different, it means that the position of the opening and closing rod has changed, and its fatigue level can be evaluated.

[0029] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0030] When testing the fatigue of the pneumatic actuator, start the air pump, inflate the pneumatic actuator through the ventilation pipe, drive its internal transmission mechanism to move, and then drive the opening and closing rod to rotate. The rotation of the opening and closing rod will push the contact rod to move, and further drive the sliding rod to slide inside the mounting plate through the limit plate, and squeeze the telescopic spring. The connecting plate moves with the sliding rod. By observing the position changes of the marking arrows and scale lines on the surface of the connecting plate, the fatigue of the opening and closing rod can be judged.

[0031] In addition, the sealing performance of the pneumatic actuator is also crucial. During the rotation of the opening and closing rod, through a series of mechanical linkages, the four sliding blocks will shrink toward the center, driving the moving block and the welding frame to move together to form a closed circle. If there is a leak at the connection between the opening and closing rod and the pneumatic actuator, the leaked gas will accelerate along the inclined surface, blowing the toggle plate to swing, and then driving the rotating sleeve block to rotate and squeeze the torsion spring. By observing the swing of the toggle plate, the leakage problem can be detected and located intuitively and effectively;

[0032] At the same time, the swing of the toggle plate will push the actuating rod to move. When the conductive plate contacts the energized plate, the alarm light will light up, prompting the inspector of the specific scope of the leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The overall structural diagram of the present invention is shown;

[0034] Figure 2 A schematic diagram of the structure of the connection assembly of the present invention is shown;

[0035] Figure 3 The present invention is shown Figure 2 A partial enlarged view of the middle part;

[0036] Figure 4 A schematic diagram of the structure of the measuring assembly of the present invention is shown;

[0037] Figure 5 Another structural schematic diagram of the measuring component of the present invention is shown;

[0038] Figure 6 A schematic diagram of the fixed disc structure of the present invention is shown;

[0039] Figure 7 A schematic diagram of the connecting rod structure of the present invention is shown;

[0040] Figure 8 A schematic cross-sectional structure diagram of the moving block of the present invention is shown.

[0041] Legend:

[0042] 10. Frame; 11. Mounting frame; 12. Pneumatic actuator; 13. Air pump; 14. Ventilation pipe;

[0043] 20. Connecting assembly; 21. Opening and closing rod; 22. Connecting frame; 23. Valve body;

[0044] 30. Detection assembly; 31. Plane groove; 32. Mounting plate; 33. Sliding rod; 34. Limiting plate; 341. Contact rod; 342. Telescopic spring; 343. Connecting plate; 344. Marking arrow; 35. Mounting block; 351. Scale line; 36. Extension plate;

[0045] 40. Measuring assembly; 41. Arc plate; 42. Fixed disc; 421. Slide groove; 43. Sliding block; 431. Mounting rod; 432. L-shaped sleeve plate; 433. Circular plate; 434. Connecting rod; 435. Limiting block; 44. Connecting rod; 441. Embedded groove; 45. Moving block; 451. Fixed plate; 452. Inclined surface; 46. Welding frame; 461. Positioning rod; 462. Torsion spring; 463. Rotating sleeve block; 464. Toggle plate; 465. Inclined surface; 47. Frame; 471. Abutting rod; 472. Power-on plate; 473. Warning light; 474. Conductive plate; 475. Battery. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] like Figure 1-Figure 8 As shown, the present invention provides a performance detection device for a valve actuator: comprising a frame 10, the frame 10 comprising a mounting frame 11, a pneumatic actuator 12 is mounted at the bottom of the mounting frame 11, an air pump 13 is mounted at the top of the mounting frame 11, a vent pipe 14 is connected between the air pump 13 and the pneumatic actuator 12, and further comprising: a connecting component 20 and a detection component 30 assembled at the bottom of the mounting frame 11;

[0048] When the fatigue of the pneumatic actuator 12 needs to be detected, the air pump 13 needs to be started first, and the air pump 13 performs an inflation operation through the vent pipe 14 so that the gas can smoothly flow into the inside of the pneumatic actuator 12 along the vent pipe 14 .

[0049] like Figure 1 , Figure 2As shown, the connection assembly 20 includes an opening and closing rod 21 rotatably connected to the inside of the pneumatic actuator 12, and a connection frame 22 connected to the bottom of the frame 10, the bottom of the connection frame 22 is connected to the valve body 23, the opening and closing rod 21 passes through the connection frame 22 and extends into the valve body 23 to connect with the valve core, and a measuring assembly 40 is installed inside the connection frame 22;

[0050] When the gas flows into the interior of the pneumatic actuator 12, it drives the transmission mechanism inside the pneumatic actuator 12 to move. This movement is transmitted through the transmission mechanism, further driving the opening and closing rod 21 to rotate, and driving the valve core to open and close. By repeatedly operating the opening and closing rod 21 to open and close, it can be detected whether the rotation of the opening and closing rod 21 will change the rotation position of the valve core inside the valve body 23 during a long opening and closing process. The purpose of this detection is to observe whether the opening and closing rod 21 can accurately and completely open or close the valve core under long-term work to avoid the situation where it is not in place.

[0051] like Figure 1 , Figure 2 , Figure 3 As shown, the detection assembly 30 includes a plane groove 31 opened on the surface of the opening and closing rod 21, and two symmetrical mounting plates 32 are installed on one side of the connecting frame 22, and three sliding rods 33 are slidably connected to the inner wall of the mounting plate 32, one end of each sliding rod 33 is connected to a contact rod 341 through a limit plate 34, and the contact rod 341 contacts the plane groove 31, and a telescopic spring 342 is sleeved on the outer periphery of the sliding rod 33, and a connecting plate 343 is connected to the other end of the sliding rod 33, and a marking arrow 344 is arranged on the top of the connecting plate 343, and three mounting blocks 35 are fixedly connected to one side of the sliding rod 33, and scale lines 351 are opened on the surface of the mounting block 35, and an extension plate 36 is connected to the top of one of the connecting plates 343, and it should be noted that when the contact rod 341 contacts the plane groove 31 opened on the side of the opening and closing rod 21, the valve core of the valve body 23 is in an open state, and when the contact rod 341 contacts the outer periphery of the opening and closing rod 21, the valve core of the valve body 23 is in a closed state;

[0052] As the opening and closing rod 21 rotates repeatedly, the contact rod 341 abutting against the plane groove 31 opened on the side thereof will move accordingly. The opening and closing rod 21 will push the contact rod 341 to move during the rotation process. This movement further drives the sliding rod 33 to slide inside the mounting plate 32 through the limit plate 34. At the same time, the sliding of the sliding rod 33 will produce a compression effect on the telescopic spring 342.

[0053] As the sliding rod 33 slides, the connecting plate 343 will also move accordingly. When the opening and closing rod 21 completes the closing action and is in place, the contact rod 341 in the middle will contact the outer periphery of the opening and closing rod 21. Since the outer periphery of the opening and closing rod 21 is circular, the contact rod 341 in the middle will move a farther distance as the opening and closing rod 21 rotates, thereby pushing the connecting plate 343 to move a farther distance. At the same time, the contact rod 341 in the middle will also drive the extension plate 36 to move together when moving.

[0054] After multiple closing operations, the fatigue degree of the opening and closing rod 21 can be judged by observing the positions of the marking arrows 344 and the scale lines 351 on the surfaces of the two outer connecting plates 343. If the positions of the two scale lines 351 are the same, it means that the opening and closing rod 21 has not changed its position under long-term opening and closing, that is, it has not been fatigued. If the positions of the two scale lines 351 are inconsistent, it means that the opening and closing rod 21 has changed its position under long-term opening and closing, that is, there may be a fatigue problem.

[0055] On the contrary, when the opening and closing rod 21 is opened after working for a long time and the telescopic spring 342 in the squeezed state is reset, it will push the limit plate 34 to move. Driven by the limit plate 34, the contact rod 341 and the sliding rod 33 will also be reset, so that the contact rod 341 will contact the flat groove 31 on the side of the opening and closing rod 21 again. At this time, if the position of the opening and closing rod 21 has not changed, the values ​​between the three marking arrows 344 and the scale line 351 should be consistent. If the values ​​are different, it means that the position of the opening and closing rod 21 has changed. Therefore, by observing the numerical position between the three marking arrows 344 and the scale line 351, it is possible to judge which side the opening and closing rod 21 is deflected to, thereby further evaluating its fatigue degree.

[0056] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, the measuring assembly 40 includes a plurality of arc-shaped plates 41 fixedly connected to the inside of the connecting frame 22, and a fixed disc 42 is connected to the bottom of the plurality of arc-shaped plates 41, and four slide grooves 421 are provided inside the fixed disc 42, and a sliding block 43 is slidably connected to the inside of each slide groove 421, and a transmission member is connected to the bottom of the sliding block 43, and the transmission member includes a mounting rod 431 connected to the bottom of the sliding block 43, and the mounting rod 431 is connected to a connecting rod 434 through an L-shaped sleeve plate 432 on the periphery, the top of the connecting rod 434 is connected to the circular plate 433, and the circular plate 433 is rotatably connected to the opening and closing rod 21, and a limiting block 435 is installed at the bottom of each mounting rod 431 and the connecting rod 434, and a measuring member is connected to the top of the fixed disc 42, and the measuring member includes a mounting rod 431 connected to the bottom of the sliding block 431, and the measuring member includes a mounting rod 431 connected to the bottom of the sliding block 431, and the mounting rod 431 is connected to the connecting rod 434 through an L-shaped sleeve plate 432 on the periphery, and the top of the connecting rod 434 is connected to the circular plate 433, and the circular plate 433 is rotatably connected to the opening and closing rod 21, and a limiting block 435 is installed at the bottom of each mounting rod 431 and the connecting rod 434, and a measuring member is connected to the top of the fixed disc 42, and the measuring member includes a mounting rod 431 connected to the bottom of the sliding block 431, and the measuring member includes a mounting rod 431 connected to the bottom of the sliding block 431, and the measuring member includes a mounting rod 431 The connecting rod 44 is connected to one side of the sliding block 43, and the connecting rod 44 is connected to the extension plate 36 through the internal embedded groove 441. A moving block 45 is installed on the top of the sliding block 43, and a fixed plate 451 is connected to the top of the moving block 45. The top of the fixed plate 451 is in contact with the inner wall of the connecting frame 22. The inner wall of the moving block 45 is fixedly connected to the welding frame 46, and a positioning rod 461 is connected between the inner walls of the welding frame 46. The positioning rod 461 is rotatably connected to the rotating sleeve block 463 through a sleeved torsion spring 462, and a toggle plate 464 is installed on the outer periphery of the rotating sleeve block 463. The surface of the fixed plate 451 is provided with an inclined surface 452, and the surface of the toggle plate 464 is provided with an inclined surface 465. A warning member in contact with the toggle plate 464 is installed inside the moving block 45;

[0057] With the long-term rotation of the opening and closing rod 21, the sealing gasket between it and the pneumatic actuator 12 may be worn and cause the sealing performance to decline. Therefore, it is necessary to accurately measure the connection point between the opening and closing rod 21 and the pneumatic actuator 12. Since the pneumatic actuator 12 needs to be inflated when the valve core is opened, the sealing measurement is required. When the valve core is closed, the gas inside the pneumatic actuator 12 will be pumped away, so when the valve core is closed, the sealing measurement is not required.

[0058] When the opening and closing rod 21 rotates to open, the connecting plate 343 in the middle will drive the extension plate 36 to move together, and the movement of the extension plate 36 further promotes the movement of the connecting rod 44, and the connecting rod 44 pushes the sliding block 43 to slide in the preset sliding groove 421. As the sliding block 43 moves, the mounting rod 431 at its bottom will drive the L-shaped sleeve plate 432 to move, thereby causing the L-shaped sleeve plate 432 to push the connecting rod 434. The force of the connecting rod 434 will drive the circular plate 433 to rotate around the outer periphery of the opening and closing rod 21. The rotation of the circular plate 433 pulls the other two sliding blocks 43 connected by the mounting rod 431 to slide in the sliding groove 421 through the connecting rod 434. In this way, the four sliding blocks 43 will shrink toward the center, and at the same time drive the moving blocks 45 at their tops to shrink together;

[0059] When the four sliding blocks 43 are retracted into place, they and the top fixed plate 451 will form a closed circle. As the moving block 45 moves, the welding frame 46 is also driven to move together. The positioning rod 461 on the welding frame 46 will push the rotating sleeve block 463 and the toggle plate 464 connected thereto to move together until the four toggle plates 464 also form a closed circle.

[0060] If there is leakage at the connection between the opening and closing rod 21 and the pneumatic actuator 12, the leaked gas will flow along the inclined surface 452, and through the acceleration effect of the inclined surface 452, the gas will quickly flow downward along the interval area between the inclined surface 452 and the opening and closing rod 21. The gas accelerated by the inclined surface 452 will blow the inclined surface 465, causing the toggle plate 464 to swing downward to a certain extent. The swing of the toggle plate 464 will drive the rotating sleeve 463 to rotate and squeeze the torsion spring 462.

[0061] When the toggle plate 464 is observed to swing, it can be determined that a leakage has occurred between the opening and closing rod 21 and the pneumatic actuator 12. By observing the swing of the toggle plate 464 at different positions, the specific leakage range can be further determined. This design provides an intuitive and effective way to detect and locate the leakage problem between the opening and closing rod 21 and the pneumatic actuator 12.

[0062] like Figure 4 , Figure 7 , Figure 8 As shown, the warning member includes a frame 47 connected to the outside of the moving block 45, and the frame 47 is internally connected with a warning light 473, one end of the warning light 473 is connected to the power-on plate 472, the moving block 45 is internally slidably connected with a push rod 471 in contact with the toggle plate 464, and one end of the push rod 471 passes through the moving block 45 and is connected to a conductive plate 474, and a battery 475 is installed on one side of the conductive plate 474, and the battery 475 and the conductive plate 474 are electrically connected;

[0063] As the toggle plate 464 swings, it will come into contact with the abutting rod 471, thereby pushing the abutting rod 471 to move inside the moving block 45. When the conductive plate 474, which is energized at this time, comes into contact with the energized plate 472, the alarm light 473 will be activated and light up, thereby prompting the inspector to indicate in which specific range the leakage has occurred.

[0064] The present invention also discloses a performance detection method for a valve actuator, comprising the following steps:

[0065] S01: starting the air pump 13, and the air pump 13 performs an inflation operation through the vent pipe 14, so that the gas can smoothly flow into the interior of the pneumatic actuator 12 along the vent pipe 14;

[0066] S02: When the gas flows into the inside of the pneumatic actuator 12, it drives the transmission mechanism inside the pneumatic actuator 12 to move. This movement is transmitted by the transmission mechanism, further driving the opening and closing rod 21 to rotate, and driving the valve core to open and close;

[0067] S03: The opening and closing rod 21 rotates. The rotation of the opening and closing rod 21 causes the contact rod 341 to move in the plane groove 31, and drives the sliding rod 33 to slide in the mounting plate 32 through the limit plate 34, and at the same time squeezes the telescopic spring 342. The movement of the sliding rod 33 drives the connecting plate 343 to move. After multiple operations, the fatigue degree of the opening and closing rod 21 can be judged by observing the position of the marking arrow 344 and the scale line 351 on the connecting plate 343;

[0068] S04: If the positions of the two scale lines 351 are consistent, it means that the opening and closing rod 21 is not fatigued. If the positions are inconsistent, there may be a fatigue problem. After the opening and closing rod 21 has worked for a long time, it is opened, and the telescopic spring 342 is reset, pushing the contact rod 341 and the sliding rod 33 to reset. At this time, if the position of the opening and closing rod 21 has not changed, the values ​​of the three marking arrows 344 and the scale lines 351 should be consistent. If the values ​​are different, it means that the position of the opening and closing rod 21 has changed, and its fatigue level can be evaluated.

[0069] Working principle: In order to detect the fatigue of the pneumatic actuator 12, first start the air pump 13, and inflate the pneumatic actuator 12 through the ventilation pipe 14. The gas drives the transmission mechanism inside the pneumatic actuator 12 to move, and then drives the opening and closing rod 21 to rotate. The rotation of the opening and closing rod 21 will cause the contact rod 341 to move in the plane groove 31, and drive the sliding rod 33 to slide in the mounting plate 32 through the limit plate 34, and at the same time squeeze the telescopic spring 342. The movement of the sliding rod 33 drives the connecting plate 343 to move. After multiple operations, the fatigue of the opening and closing rod 21 can be judged by observing the position of the marking arrow 344 and the scale line 351 on the connecting plate 343;

[0070] If the positions of the two scale lines 351 are consistent, it means that the opening and closing rod 21 is not fatigued. If the positions are inconsistent, there may be a fatigue problem. After the opening and closing rod 21 has been working for a long time, it is opened, and the telescopic spring 342 is reset, pushing the contact rod 341 and the sliding rod 33 to reset. At this time, if the position of the opening and closing rod 21 has not changed, the values ​​of the three marking arrows 344 and the scale lines 351 should be consistent. If the values ​​are different, it means that the position of the opening and closing rod 21 has changed, and its fatigue degree can be evaluated.

[0071] After long-term use, the sealing gasket between the opening and closing rod 21 and the pneumatic actuator 12 may be worn, and the connection point needs to be accurately measured. When the opening and closing rod 21 rotates to open, the connecting plate 343 drives the extension plate 36 and the connecting rod 44 to move, thereby pushing the sliding block 43 to slide in the sliding groove 421. The four sliding blocks 43 shrink toward the center, driving the moving block 45 and the welding frame 46 to move until the four toggle plates 464 form a closed circle;

[0072] If there is a leak at the connection, the gas will accelerate along the inclined surface 452, blowing the inclined surface 465, causing the toggle plate 464 to swing and drive the rotating sleeve block 463 to rotate, squeezing the torsion spring 462. When the toggle plate 464 is observed to swing, it can be determined that a leak has occurred. The leakage range can be determined by observing the swinging situation. The swinging of the toggle plate 464 will contact the abutting rod 471, pushing it to move in the moving block 45. When the conductive plate 474 contacts the energized plate 472, the alarm light 473 lights up, reminding the inspection personnel of the leakage range.

[0073] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A performance detection device for a valve actuator, comprising a frame (10), characterized in that: Also includes: A connecting component (20) and a detecting component (30) assembled on the bottom of the frame (10); The detection component (30) comprises a plane groove (31) formed on the surface of the connection component (20), and two symmetrical mounting plates (32) are mounted on one side of the connection component (20), and a plurality of sliding rods (33) are slidably connected to the inner wall of the mounting plate (32), one end of the sliding rod (33) is connected to a contact rod (341) via a limit plate (34), and the contact rod (341) is in contact with the plane groove (31), a telescopic spring (342) is sleeved on the outer periphery of the sliding rod (33), the other end of the sliding rod (33) is connected to a connecting plate (343), and a marking arrow (344) is disposed on the top of the connecting plate (343), a plurality of mounting blocks (35) are fixedly connected to one side of the sliding rod (33), and a scale mark (351) is disposed on the surface of the mounting block (35), and an extension plate (36) is connected to the top of one of the connecting plates (343); The connecting assembly (20) rotates, and the contact rod (341) abutting against the plane groove (31) drives the sliding rod (33) to slide as it rotates, and pushes the connecting plate (343). Whether changes are observed is determined by observing the positions of the marking arrow (344) and the scale line (351).

2. A performance detection device for a valve actuator according to claim 1, characterized in that: The connecting assembly (20) comprises an opening and closing rod (21) rotatably connected to the inside of the frame (10), and a connecting frame (22) connected to the bottom of the frame (10), the bottom of the connecting frame (22) is connected to a valve body (23), the opening and closing rod (21) passes through the connecting frame (22) and extends into the valve body (23) to be connected to the valve core, and a measuring assembly (40) is installed inside the connecting frame (22).

3. A performance detection device for a valve actuator according to claim 2, characterized in that: The measuring assembly (40) comprises a plurality of arc-shaped plates (41) fixedly connected to the inside of the connecting frame (22), wherein the bottoms of the plurality of arc-shaped plates (41) are connected to a fixed disc (42), the inside of the fixed disc (42) is provided with a plurality of slide grooves (421), and the inside of each slide groove (421) is slidably connected to a sliding block (43), the bottom of the sliding block (43) is connected to a transmission member, and the top of the fixed disc (42) is connected to a measuring member.

4. A performance detection device for a valve actuator according to claim 3, characterized in that: The transmission member comprises a mounting rod (431) connected to the bottom of the sliding block (43), and the mounting rod (431) is connected to a connecting rod (434) via an L-shaped sleeve plate (432) on the outer periphery, the top of the connecting rod (434) is connected to the circular plate (433), and a limiting block (435) is installed at the bottom of each mounting rod (431) and the connecting rod (434).

5. A performance detection device for a valve actuator according to claim 4, characterized in that: The measuring member comprises a connecting rod (44) connected to one side of a sliding block (43), the connecting rod (44) being connected to an extension plate (36) via an internal embedded groove (441), a moving block (45) being mounted on the top of the sliding block (43), and a fixing plate (451) being connected to the top of the moving block (45), a welding frame (46) being fixedly connected to the inner wall of the moving block (45), a positioning rod (461) being connected between the inner walls of the welding frame (46), the positioning rod (461) being rotatably connected to a rotating sleeve block (463) via a sleeved torsion spring (462), and a toggle plate (464) being mounted on the outer periphery of the rotating sleeve block (463), and a warning member contacting the toggle plate (464) being mounted inside the moving block (45).

6. A performance detection device for a valve actuator according to claim 5, characterized in that: The surface of the fixing plate (451) is provided with an inclined surface (452), and the surface of the shifting plate (464) is provided with an inclined surface (465).

7. A performance detection device for a valve actuator according to claim 6, characterized in that: The warning member comprises a frame (47) connected to the outside of the moving block (45), and the frame (47) is internally connected to a warning light (473), one end of the warning light (473) is connected to a power-on plate (472), the moving block (45) is internally slidably connected to a stopper rod (471) in contact with a toggle plate (464), one end of the stopper rod (471) passes through the moving block (45) and is connected to a conductive plate (474), a battery (475) is installed on one side of the conductive plate (474), and the battery (475) and the conductive plate (474) are electrically connected.

8. A performance detection device for a valve actuator according to claim 7, characterized in that: The frame (10) comprises a mounting frame (11), a pneumatic actuator (12) is mounted on the bottom of the mounting frame (11), an air pump (13) is mounted on the top of the mounting frame (11), and a ventilation pipe (14) is connected between the air pump (13) and the pneumatic actuator (12).

9. A performance detection method for a valve actuator, using the performance detection device for a valve actuator according to claim 8, characterized in that: The detection method includes the following steps: S01: starting the air pump (13), and the air pump (13) performs an inflation operation through the vent pipe (14), so that the gas can smoothly flow along the vent pipe (14) into the interior of the pneumatic actuator (12); S02: When the gas flows into the interior of the pneumatic actuator (12), it drives the transmission mechanism inside the pneumatic actuator (12) to move. This movement is transmitted through the transmission mechanism, further driving the opening and closing rod (21) to rotate, and driving the valve core to open and close; S03: The opening and closing rod (21) rotates. The rotation of the opening and closing rod (21) causes the contact rod (341) to move in the plane groove (31), and drives the sliding rod (33) to slide in the mounting plate (32) through the limit plate (34). At the same time, the telescopic spring (342) is squeezed. The movement of the sliding rod (33) drives the connecting plate (343) to move. After multiple operations, the fatigue degree of the opening and closing rod (21) is judged by observing the position of the marking arrow (344) and the scale line (351) on the connecting plate (343); S04: If the positions of the two scale lines (351) are consistent, it means that the opening and closing rod (21) is not fatigued. If the positions are inconsistent, there is a fatigue problem. After the opening and closing rod (21) has been working for a long time, it is opened, and the telescopic spring (342) is reset, pushing the contact rod (341) and the sliding rod (33) to reset. At this time, if the position of the opening and closing rod (21) has not changed, the values ​​of the three marking arrows (344) and the scale lines (351) should be consistent. If the values ​​are different, it means that the position of the opening and closing rod (21) has changed, and its fatigue level is evaluated.

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