A valve actuator performance detection device

Abstract

The present invention relates to the technical field of valve actuators, and discloses a valve actuator performance detection device, including an operating table mechanism, wherein a detection mechanism is installed on the upper end of the operating table mechanism, and a valve actuator body is installed on the detection mechanism; a driving mechanism is installed on the upper end of the valve actuator body, and the driving mechanism includes a first rotating shaft. When the valve actuator body is opened and closed to a certain extent, the lower corrugated teeth, the lower plate, the elastic member, the clamping mechanism and the valve actuator body can no longer rotate, that is, the lower corrugated teeth cooperate and disengage with the upper corrugated teeth, driving the lower plate to move downward and squeeze the elastic member, thereby unloading the force of the first rotating shaft. Even if the first rotating shaft is always in a rotating state, it is impossible to continue to apply force to the switch of the valve actuator body. The device has a safety protection function and solves the problem that the force of motor control is difficult to control and affects the detection result.

Description

Technical Field

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

[0002] Valve actuators are indispensable actuators in process automation control systems. They are used in large quantities and have a wide range of applications. The working principle of valve actuators is to rotate the output shaft to achieve the angle of valve opening and closing, thereby achieving flow control. The performance of valve actuators needs to be tested before leaving the factory.

[0003] For example, a valve actuator performance detection device with publication number CN212432510U includes a base and a valve actuator, a motor is fixed to the top of the base by bolts, two mounting plates are welded to the upper surface of the base, a mounting hole is opened on one side of the mounting plate, a reciprocating screw is rotatably connected in the mounting hole, one end of the motor output shaft is fixedly connected to one end of the reciprocating screw, and one side of the reciprocating screw is slidably connected to a threaded sleeve, a guide rod is welded between the two mounting plates, a rack is slidably connected to one side of the guide rod, and one side of the rack is fixedly connected to the outer wall of one side of the threaded sleeve, a counter is fixed to the top of the mounting plate by bolts, and a button is provided on one side of the counter. This application can automatically open and close the valve actuator for detection, without manual detection, saving a lot of manpower and material resources, and can detect the service life of the valve actuator and improve the accuracy of detection.

[0004] The above patent uses a motor to open and close the valve actuator, but different valve actuators have different opening and closing degrees. During the detection process, the force of the motor control is difficult to control. If the opening and closing is excessive, it will cause the valve actuator to slip or be damaged. If the opening and closing angle is insufficient, the valve will not close tightly, affecting the detection structure.

[0005] Therefore, we propose a valve actuator performance detection device to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a valve actuator performance detection device to solve the problem raised in the above background technology that during the detection process, the force of motor control is difficult to control, which affects the detection result.

[0007] To achieve the above object, the present invention provides the following technical solution: a valve actuator performance detection device, comprising an operating table mechanism, a detection mechanism is installed on the upper end of the operating table mechanism, and a valve actuator body is installed on the detection mechanism;

[0008] The detection mechanism comprises two connecting pipes, one end of each of the two connecting pipes is provided with a connecting flange connected to the valve actuator body, one end of the connecting pipe away from the connecting flange is connected with a water storage tank, and a water level sensor is installed in each of the water storage tanks;

[0009] A driving mechanism is installed at the upper end of the valve actuator body, and the driving mechanism includes a first rotating shaft;

[0010] The lower end of the driving mechanism is provided with a force unloading mechanism, and the force unloading mechanism includes an upper plate, an upper corrugated tooth is installed at the lower end of the upper plate, a lower corrugated tooth is meshedly installed at the lower end of the upper corrugated tooth, a lower plate is fixedly installed at the lower end of the lower corrugated tooth, a fixing sleeve is fixedly installed at the lower end of the lower plate, and an elastic member is fixedly installed at the lower end of the lower plate;

[0011] A clamping mechanism is installed at the lower end of the force unloading mechanism.

[0012] Preferably, the operating table mechanism includes a base, an operating plate is fixedly installed on the upper end of the base, a slide groove is opened on the upper end of the operating plate, a bidirectional screw rod is rotatably installed in the slide groove, a limit plate is threadedly installed on the bidirectional screw rod, the limit plate is slidably installed in the slide groove, and the valve actuator body is arranged between two relative limit plates.

[0013] Preferably, vertical rods are fixedly installed on the upper ends of the four corners of the base, a top plate is fixedly installed on the upper ends of the vertical rods, a reinforcement plate is installed on the vertical rods, a reinforcement ring is inlaid at the center position of the reinforcement plate, a ranging sensor is installed on the upper end of the reinforcement plate, and the ranging sensor is located at the lower end of the lower plate.

[0014] Preferably, the driving mechanism includes a motor fixedly mounted on the lower end of the top plate, a first gear is mounted on the lower end of the motor, a plurality of first protrusions arranged equidistantly are fixedly mounted on the lower end of the first gear, the upper end of the first rotating shaft is rotatably connected to the top plate, a second gear is coaxially fixedly mounted on the first rotating shaft, and a plurality of the first protrusions are meshingly connected to the second gear.

[0015] Preferably, a third gear is meshedly installed at one end of the first gear, a second rotating shaft is fixedly installed in the middle of the third gear, the second rotating shaft is rotatably installed at the lower end of the top plate, and a plurality of second protrusions equidistantly arranged are fixedly installed at the lower end of the third gear.

[0016] Preferably, a plurality of the first protrusions are arranged on an arc line with the first gear as the center, and a plurality of the second protrusions are arranged on an arc line with the third gear as the center, and the two are symmetrically arranged.

[0017] Preferably, a mounting sleeve is installed in the middle of the reinforcement ring, the upper end of the mounting sleeve is rotatably connected to the elastic member, the mounting sleeve is fixedly installed on the lower end of the lower plate, the clamping mechanism is arranged inside the mounting sleeve, and a rotating ring is rotatably installed on the inner wall of the mounting sleeve.

[0018] Preferably, the clamping mechanism comprises a central shaft, a spiral sleeve is fixedly mounted on the outer periphery of the lower end of the central shaft, the spiral sleeve is threadedly connected to the mounting sleeve, and a connecting block is fixedly mounted on the lower end of the central shaft.

[0019] Preferably, vertical plates are provided on both sides of the lower end of the spiral sleeve, two inclined plates are rotatably mounted on the vertical plates, a clamping plate is commonly mounted on one end of the two inclined plates, and one end of the inclined plate is also rotatably connected to the connecting block.

[0020] Preferably, rubber blocks are fixedly mounted on both ends of the inner wall of the clamping plate, and an arc-shaped plate is fixedly mounted on the lower end of the clamping plate.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. When the valve actuator body is opened and closed to a certain extent, the lower corrugated teeth, the lower plate, the elastic member, the clamping mechanism and the valve actuator body can no longer rotate, that is, the lower corrugated teeth cooperate and disengage with the upper corrugated teeth, driving the lower plate to move downward and squeeze the elastic member, thereby unloading the force on the first rotating shaft. At this time, even if the first rotating shaft is always in a rotating state, it is impossible to continue to apply force to the switch of the valve actuator body. It has a safety protection function and solves the problem proposed in the background technology that the motor control force of the valve actuator body is difficult to control during the detection process, thereby affecting the detection result.

[0023] 2. The top plate is fixed on the base through a vertical rod. The first shaft rotates at a constant speed. When the lower corrugated teeth and the lower plate move downward, the lower plate approaches the distance sensor to the lowest point. The distance sensor detects it. The time difference between the two data detections is used to determine whether there is a difference in the torque of the valve actuator body switch. If the time between the two detections is getting longer and longer, it means that the switch of the valve actuator body will gradually loosen, which is convenient for detecting the service life of the valve actuator body switch. The detection range is relatively diverse.

[0024] 3. When the first gear and multiple first protrusions rotate to engage with the second gear, the second protrusion on the third gear rotates away from the second gear. When the multiple first protrusions on the first gear rotate to away from the second gear, the second protrusion is meshed and connected with the second gear, thereby driving the second gear and the first rotating shaft to reverse, thereby realizing continuous forward and reverse movement of the first rotating shaft, which is convenient for realizing the opening and closing operation of the valve actuator body switch. This device adopts the same driving source to realize continuous opening and closing of the switch, ensure the uniform force of opening the valve actuator body switch, reduce the risk of switch damage, and improve the fluency of data detection and the accuracy of results.

[0025] 4. Through the cooperation between the spiral sleeve and the installation sleeve, the connecting block, the central axis and the spiral sleeve move upward, and the two clamping plates approach each other to clamp the valve actuator body, so as to limit the switch of the valve actuator body. When the clamping plates approach each other to a certain extent, the connecting block, the central axis and the spiral sleeve can no longer move upward, which will drive the connecting block, the central axis, the spiral sleeve and the switch of the valve actuator body to rotate together, which is convenient for subsequent operations. This device adopts a drive, which can realize clamping, limiting, opening and closing, and unloading in one, with strong safety. While ensuring that the valve actuator body is not restricted by external force, each data is accurately detected, which greatly improves the comprehensiveness and accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the operating table mechanism of the present invention;

[0028] Figure 3 It is an overall top view of the present invention;

[0029] Figure 4 For the present invention Figure 3 Middle AA section;

[0030] Figure 5 It is a schematic diagram of the structure of the detection mechanism of the present invention;

[0031] Figure 6 It is a sectional view of the central axis of the present invention;

[0032] Figure 7 It is a schematic diagram of the driving mechanism structure of the present invention;

[0033] Figure 8 It is a schematic diagram of the structure of the force unloading mechanism of the present invention.

[0034] In the figure: 1. operating table mechanism; 11. base; 12. operating panel; 13. slideway; 14. bidirectional screw rod; 15. limit plate; 16. vertical rod; 17. top plate; 18. reinforcement plate; 19. reinforcement ring; 2. detection mechanism; 21. connecting pipe; 22. connecting flange; 23. water tank; 24. water level sensor; 3. valve actuator body; 4. driving mechanism; 41. motor; 42. first gear; 43. first protrusion; 44. second gear; 46. first A rotating shaft; 47, a second rotating shaft; 48, a third gear; 49, a second protrusion; 5, a force unloading mechanism; 51, an upper plate; 52, an upper corrugated tooth; 53, a lower corrugated tooth; 54, a lower plate; 55, a fixed sleeve; 56, an elastic member; 57, a mounting sleeve; 58, a rotating ring; 6, a clamping mechanism; 61, a middle shaft; 62, a spiral sleeve; 63, a connecting block; 64, a vertical plate; 65, an inclined plate; 66, a clamping plate; 67, a rubber block; 68, an arc plate; 7, a distance measuring sensor. DETAILED DESCRIPTION

[0035] 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.

[0036] Example 1: Please refer to Figure 1-Figure 6 , Figure 8 The present invention provides a technical solution: a valve actuator performance detection device, comprising an operating table mechanism 1, a detection mechanism 2 is installed on the upper end of the operating table mechanism 1, a valve actuator body 3 is installed on the detection mechanism 2, the valve actuator body 3 is installed on the upper end of the operating table mechanism 1, and the valve actuator body 3 is detected by the detection mechanism 2;

[0037] The detection mechanism 2 includes two connecting pipes 21, one end of each of the two connecting pipes 21 is equipped with a connecting flange 22 connected to the valve actuator body 3, and the end of the connecting pipe 21 away from the connecting flange 22 is connected to a water tank 23, and a water level sensor 24 is installed in the water tank 23. The model of the water level sensor 24 is KPSI 300DS. A water pump is also installed inside the water tank 23, and the water pump is connected to the connecting pipe 21. The two ends of the valve at the lower end of the valve actuator body 3 are respectively connected to the connecting pipe 21 through the connecting flange 22.

[0038] A driving mechanism 4 is installed on the upper end of the valve actuator body 3 , and the driving mechanism 4 includes a first rotating shaft 46 .

[0039] A force unloading mechanism 5 is provided at the lower end of the driving mechanism 4, and the force unloading mechanism 5 includes an upper plate 51, which is fixedly connected to the first rotating shaft 46, an upper corrugated tooth 52 is installed at the lower end of the upper plate 51, and a lower corrugated tooth 53 is meshingly installed at the lower end of the upper corrugated tooth 52, a lower plate 54 is fixedly installed at the lower end of the lower corrugated tooth 53, a fixed sleeve 55 is fixedly installed at the lower end of the lower plate 54, and an elastic member 56 is fixedly installed at the lower end of the lower plate 54. In the initial state, the elastic member 56 is in a stretched state, so that the upper corrugated tooth 52 and the lower corrugated tooth 53 are meshed together to ensure the connectivity of the device.

[0040] A clamping mechanism 6 is installed at the lower end of the unloading mechanism 5 .

[0041] In this embodiment, the clamping mechanism 6 is connected to the switch of the valve actuator body 3, driving the first rotating shaft 46 to rotate, the upper plate 51 and the upper corrugated teeth 52 to rotate synchronously, and the upper corrugated teeth 52 are engaged with the lower corrugated teeth 53, driving the lower corrugated teeth 53, the lower plate 54, the elastic member 56, the clamping mechanism 6 and the switch of the valve actuator body 3 to rotate together.

[0042] After the valve actuator body 3 is opened, the water pump is turned on together, and the water in one water tank 23 is transferred to the other water tank 23 through the connecting pipe 21 and the valve actuator body 3. The two water level sensors 24 work simultaneously to detect the changes in the water levels in the two water tanks 23 after the water flows.

[0043] When the valve actuator body 3 is opened and closed to a certain extent, the lower corrugated teeth 53, the lower plate 54, the elastic member 56, the clamping mechanism 6 and the valve actuator body 3 can no longer rotate, that is, the lower corrugated teeth 53 and the upper corrugated teeth 52 cooperate and disengage, driving the lower plate 54 to move downward and squeeze the elastic member 56, thereby unloading the force of the first rotating shaft 46. At this time, even if the first rotating shaft 46 is always in a rotating state, it is impossible to continue to apply force to the switch of the valve actuator body 3, which has a safety protection function and solves the problem proposed in the background technology that the force of the motor 41 controlling the valve actuator body 3 during the detection process is difficult to control, thereby affecting the detection result.

[0044] When the first rotating shaft 46 rotates in the reverse direction, the switch of the valve actuator body 3 is gradually closed. After multiple opening and closing cycles, the service life of the valve actuator body 3 is detected by comparing the data of the water level sensor 24.

[0045] Example 2: Please refer to Figure 2-Figure 5 The operating table mechanism 1 includes a base 11, an operating panel 12 is fixedly mounted on the upper end of the base 11, a slide groove 13 is opened on the upper end of the operating panel 12, a bidirectional screw rod 14 is rotatably mounted in the slide groove 13, a limit plate 15 is threadedly mounted on the bidirectional screw rod 14, the limit plate 15 is slidably mounted in the slide groove 13, and the valve actuator body 3 is arranged between two relatively limit plates 15.

[0046] The operating panel 12 is fixed on the base 11, the lower end of the valve actuator body 3 is installed on the operating panel 12 and between a plurality of limit plates 15, the bidirectional screw rod 14 is manually rotated, and the two limit plates 15 on the same bidirectional screw rod 14 are moved closer to or away from each other until a suitable distance is adjusted, so that the bottom of the valve actuator body 3 can be fixed, thereby ensuring the stability of the valve actuator body 3 during the detection process.

[0047] Vertical rods 16 are fixedly installed on the upper ends of the four corners of the base 11, a top plate 17 is fixedly installed on the upper ends of the vertical rods 16, a reinforcement plate 18 is installed on the vertical rods 16, a reinforcement ring 19 is inlaid at the center of the reinforcement plate 18, a distance sensor 7 is installed on the upper end of the reinforcement plate 18, the distance sensor 7 is located at the lower end of the lower plate 54, and the model of the distance sensor 7 is VL53L1X.

[0048] The top plate 17 is fixedly mounted on the base 11 by the vertical rod 16, and the first rotating shaft 46 rotates at a constant speed. When the lower corrugated teeth 53 and the lower plate 54 move downward, when the lower plate 54 approaches the distance sensor 7 to the lowest point, the distance sensor 7 detects it, and judges whether there is a difference in the torque of the switch of the valve actuator body 3 based on the time difference of the two data detections. If the time between the two detections is getting longer and longer, it means that the switch of the valve actuator body 3 will gradually loosen, which is convenient for detecting the service life of the switch of the valve actuator body 3, and the detection range is more diverse.

[0049] Example 3: Please refer to Figure 4 , Figure 6-Figure 7 The driving mechanism 4 includes a motor 41 fixedly mounted on the lower end of the top plate 17, a first gear 42 is mounted on the lower end of the motor 41, a plurality of first protrusions 43 equidistantly arranged are fixedly mounted on the lower end of the first gear 42, an upper end of a first rotating shaft 46 is rotatably connected to the top plate 17, a second gear 44 is coaxially fixedly mounted on the first rotating shaft 46, and a plurality of first protrusions 43 are meshingly connected to the second gear 44.

[0050] After the motor 41 is turned on, the first gear 42 and the first protrusion 43 rotate. When multiple first protrusions 43 rotate to engage with the second gear 44, the second gear 44, the first rotating shaft 46, and the upper corrugated tooth 52 can rotate, and the valve actuator body 3 switch is turned on. When the first protrusion 43 rotates to move away from the second gear 44, the second gear 44 and the first rotating shaft 46 do not rotate, and then the first rotating shaft 46 and the upper corrugated tooth 52 can stop rotating, thereby realizing intermittent rotation of the first rotating shaft 46.

[0051] A third gear 48 is meshed with one end of the first gear 42 , a second shaft 47 is fixedly mounted in the middle of the third gear 48 , the second shaft 47 is rotatably mounted on the lower end of the top plate 17 , and a plurality of second protrusions 49 equidistantly arranged are fixedly mounted on the lower end of the third gear 48 .

[0052] The plurality of first protrusions 43 are arranged on an arc line with the first gear 42 as the center, and the plurality of second protrusions 49 are arranged on an arc line with the third gear 48 as the center, and the two are arranged symmetrically.

[0053] The first gear 42 is meshed and connected with the third gear 48. When the first gear 42 and the plurality of first protrusions 43 rotate to mesh with the second gear 44, the second protrusion 49 on the third gear 48 rotates away from the second gear 44. When the plurality of first protrusions 43 on the first gear 42 rotates to away from the second gear 44, the second protrusion 49 is meshed and connected with the second gear 44, thereby driving the second gear 44 and the first rotating shaft 46 to reverse, thereby realizing continuous forward and reverse movement of the first rotating shaft 46, thereby facilitating the opening and closing operation of the valve actuator body 3 switch.

[0054] The device uses the same driving source to achieve continuous opening and closing of the switch, ensure the uniform force of opening the switch of the valve actuator body 3, reduce the risk of switch damage, and improve the fluency of data detection and the accuracy of results.

[0055] Example 4: Please refer to Figure 4-8 A mounting sleeve 57 is rotatably installed in the middle of the reinforcement ring 19. The mounting sleeve 57 is fixedly installed at the lower end of the lower plate 54. The upper end of the mounting sleeve 57 is rotatably connected to the elastic member 56. The clamping mechanism 6 is arranged inside the mounting sleeve 57. A rotating ring 58 is rotatably installed on the inner wall of the mounting sleeve 57.

[0056] The clamping mechanism 6 includes a central shaft 61 , a spiral sleeve 62 is fixedly mounted on the outer periphery of the lower end of the central shaft 61 , the spiral sleeve 62 is threadedly connected to the mounting sleeve 57 , and a connecting block 63 is fixedly mounted on the lower end of the central shaft 61 .

[0057] Vertical plates 64 are provided on both sides of the lower end of the spiral sleeve 62. The vertical plates 64 are fixedly connected to the mounting sleeve 57. One end of the vertical plates 64 is rotatably connected to the rotating ring 58. Two inclined plates 65 are rotatably installed on the vertical plates 64. A clamping plate 66 is commonly installed at one end of the two inclined plates 65. One end of the inclined plates 65 is also rotatably connected to the connecting block 63. The central axis 61, the spiral sleeve 62, the vertical plate 64, the two inclined plates 65, and the two clamping plates 66 are jointly combined into a mechanical claw mechanism. When the central axis 61 moves upward, the two clamping plates 66 approach each other.

[0058] Rubber blocks 67 are fixedly mounted on both ends of the inner wall of the clamping plate 66 , and an arc-shaped plate 68 is fixedly mounted on the lower end of the clamping plate 66 .

[0059] In this embodiment, the valve actuator body 3 is installed between multiple limit plates 15, and the switch of the valve actuator body 3 is installed between two clamping plates 66 and is resisted by four rubber blocks 67. After the motor 41 is turned on, the first rotating shaft 46, the upper plate 51, the upper corrugated teeth 52, the lower corrugated teeth 53, the lower plate 54, and the mounting sleeve 57 rotate, and the two clamping plates 66 are limited by the switch of the valve actuator body 3 and cannot rotate. Through the cooperation between the spiral sleeve 62 and the mounting sleeve 57, the connecting block 63, the middle axis 61, and the spiral sleeve 62 move upward, and the two clamping plates 66 approach each other to clamp the valve actuator body 3, so that the switch of the valve actuator body 3 can be limited.

[0060] When the clamping plates 66 are close to each other to a certain extent, the connecting block 63, the middle shaft 61, and the spiral sleeve 62 can no longer move upward, that is, when the first rotating shaft 46, the upper plate 51, the upper corrugated teeth 52, the lower corrugated teeth 53, the lower plate 54, and the mounting sleeve 57 rotate, the connecting block 63, the middle shaft 61, the spiral sleeve 62, and the switch of the valve actuator body 3 will be driven to rotate together, which is convenient for subsequent operations.

[0061] The device adopts one drive, which can realize clamping, limiting, opening and closing, and unloading in one, and has strong safety. While ensuring that the valve actuator body 3 is not restricted by external force, each data is accurately detected, which greatly improves the comprehensiveness and accuracy of the detection.

[0062] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0063] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve actuator performance detection device, comprising an operating platform mechanism (1), a detection mechanism (2) being installed at the upper end of the operating platform mechanism (1), and a valve actuator body (3) being installed on the detection mechanism (2); It is characterized in that The detection mechanism (2) comprises two connecting pipes (21), one end of each of the two connecting pipes (21) is provided with a connecting flange (22) connected to the valve actuator body (3), one end of the connecting pipe (21) away from the connecting flange (22) is connected to a water tank (23), and a water level sensor (24) is provided in each of the water tanks (23); A driving mechanism (4) is mounted on the upper end of the valve actuator body (3), and the driving mechanism (4) comprises a first rotating shaft (46); A force unloading mechanism (5) is provided at the lower end of the driving mechanism (4), the force unloading mechanism (5) comprising an upper plate (51), an upper corrugated tooth (52) being mounted at the lower end of the upper plate (51), a lower corrugated tooth (53) being meshedly mounted at the lower end of the upper corrugated tooth (52), a lower plate (54) being fixedly mounted at the lower end of the lower corrugated tooth (53), a fixing sleeve (55) being fixedly mounted at the lower end of the lower plate (54), and an elastic member (56) being fixedly mounted at the lower end of the lower plate (54); A clamping mechanism (6) is installed at the lower end of the unloading mechanism (5); The operating table mechanism (1) comprises a base (11), an operating panel (12) is fixedly mounted on the upper end of the base (11), a slide groove (13) is provided on the upper end of the operating panel (12), a bidirectional screw rod (14) is rotatably mounted in the slide groove (13), a limit plate (15) is threadedly mounted on the bidirectional screw rod (14), the limit plate (15) is slidably mounted in the slide groove (13), and the valve actuator body (3) is arranged between two opposite limit plates (15); Vertical rods (16) are fixedly mounted on the upper ends of the four corners of the base (11); a top plate (17) is fixedly mounted on the upper ends of the vertical rods (16); a reinforcement plate (18) is mounted on the vertical rods (16); a reinforcement ring (19) is inlaid at the center of the reinforcement plate (18); a distance sensor (7) is mounted on the upper end of the reinforcement plate (18); and the distance sensor (7) is located at the lower end of the lower plate (54); The driving mechanism (4) comprises a motor (41) fixedly mounted on the lower end of the top plate (17); a first gear (42) is mounted on the lower end of the motor (41); a plurality of first protrusions (43) arranged at equal intervals are fixedly mounted on the lower end of the first gear (42); an upper end of the first rotating shaft (46) is rotatably connected to the top plate (17); a second gear (44) is coaxially fixedly mounted on the first rotating shaft (46); and a plurality of the first protrusions (43) are meshingly connected to the second gear (44); A third gear (48) is meshedly mounted on one end of the first gear (42); a second rotating shaft (47) is fixedly mounted in the middle of the third gear (48); the second rotating shaft (47) is rotatably mounted on the lower end of the top plate (17); and a plurality of second protrusions (49) are fixedly mounted at an equal distance from each other on the lower end of the third gear (48); A plurality of the first protrusions (43) are arranged on an arc line with the first gear (42) as the center, and a plurality of the second protrusions (49) are arranged on an arc line with the third gear (48) as the center, and the two are arranged symmetrically; A mounting sleeve (57) is installed in the middle of the reinforcement ring (19); the upper end of the mounting sleeve (57) is rotatably connected to the elastic member (56); the mounting sleeve (57) is fixedly installed at the lower end of the lower plate (54); the clamping mechanism (6) is arranged inside the mounting sleeve (57); and a rotating ring (58) is rotatably installed on the inner wall of the mounting sleeve (57); The clamping mechanism (6) comprises a central shaft (61), a spiral sleeve (62) is fixedly mounted on the outer periphery of the lower end of the central shaft (61), the spiral sleeve (62) is threadedly connected to the mounting sleeve (57), and a connecting block (63) is fixedly mounted on the lower end of the central shaft (61); Vertical plates (64) are provided on both sides of the lower end of the spiral sleeve (62), one end of the vertical plate (64) is rotatably connected to the rotating ring (58), two inclined plates (65) are rotatably mounted on the vertical plate (64), one end of the two inclined plates (65) is commonly mounted with a clamping plate (66), and one end of the inclined plate (65) is also rotatably connected to the connecting block (63).

2. A valve actuator performance detection device according to claim 1, characterized in that: Rubber blocks (67) are fixedly mounted on both ends of the inner wall of the clamping plate (66), and an arc-shaped plate (68) is fixedly mounted on the lower end of the clamping plate (66).

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