An electric valve actuator testing device and testing method

Abstract

This invention relates to the field of testing equipment technology and discloses an electric valve actuator testing device, including a device frame and an electric valve actuator, and further including: a torque testing component installed on one side of the inner wall of the device frame; in this invention, the electric valve actuator is directly placed inside the corresponding stop groove on the top of the support plate, and the top pressure cylinder pushes the connecting frame to move down as a whole. During the downward movement of the connecting frame, the movable sleeves at both ends and the lifting frame at the bottom move down synchronously. When the lifting frame moves down, the bottom abutment plate first abuts against the top of the electric valve actuator. As the top pressure cylinder continues to push the connecting frame down, the connecting frame applies downward pressure to the lifting frame through the support spring, and then the abutment plate completes the pressing and positioning of the top of the electric valve actuator. This enables rapid positioning of the electric valve actuator and avoids displacement of the electric valve actuator during the test, which would cause test force components and insufficient test accuracy.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, specifically to a testing device and method for an electric valve actuator. Background Technology

[0002] Various valves typically rely on actuators for opening and closing control. Actuators can be categorized into pneumatic, electric, and hydraulic types based on their power source, with electric actuators being the most widely used due to their high control precision, fast response, and ease of integration into automation systems. During the production process of electric valve actuators, key indicators such as output torque, stroke accuracy, response time, and insulation performance must be comprehensively tested to ensure that the products meet design requirements and safety standards, preventing substandard actuators from entering the market and affecting the reliability and service life of the entire valve system. Torque performance testing, in particular, directly relates to whether the valve can open and close normally under rated load and is a core aspect of actuator quality control. Therefore, developing efficient, accurate, and automated torque detection devices is of great significance.

[0003] For example, Chinese Patent Publication No. CN206095493U discloses a torque detection device for an electric valve actuator, which includes a bearing, a base plate, a lever, a flange, a force measuring block, and a pressure sensor. The bearing is fixedly mounted on the base plate. The lever includes a fixed end and a free end, which are fixedly connected to the bearing through the fixed end and can rotate horizontally through the bearing. A flange that can be connected to the electric valve actuator that needs to be torque detected is fixedly connected to the top of the fixed end. A shaft stabilizer is provided in the middle of the flange, which can be fixedly connected to the rotating shaft of the electric valve actuator that is installed on the flange for torque detection.

[0004] The above-cited document states that by activating the electric valve actuator, the flange can be driven to rotate around the axis of the bearing; the force measuring block is installed on the base plate on one side of the free end; the pressure sensor is installed on the force measuring block and located between the free end and the force measuring block. When the lever rotates, its free end can convert the torque on the lever into pressure and transmit it to the pressure sensor.

[0005] However, in the aforementioned cited documents, when the electric valve actuator is connected to the testing equipment, the connection between the equipment and the electric valve actuator needs to be manually calibrated and disassembled. This not only increases the workload of manual operation but also slows down the overall testing efficiency. In addition, positioning deviations are prone to occur during manual docking and calibration, which leads to errors in the torque test results and affects the accuracy of the test results. Summary of the Invention

[0006] The purpose of this invention is to provide a testing device and method for electric valve actuators, which enables rapid docking and fixing of the electric valve actuator and the device, as well as synchronous torque transmission. This reduces the burden of manual operation, improves testing efficiency, ensures accurate docking and positioning, and enhances the precision of test results, thus solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an electric valve actuator testing device, comprising a device frame and an electric valve actuator mechanism, and further comprising: A torque testing assembly is installed on one side of the inner wall of the equipment frame. The torque testing assembly includes a linear slide fixedly installed on one side of the inner wall of the equipment frame. The torque testing assembly is used to test the torque of the electric valve actuator. A top-pressing assembly is installed on the top of the inner wall of the equipment frame. The top-pressing assembly includes a top-pressing cylinder installed on the top of the inner wall of the equipment frame. The top-pressing assembly is used to press and position the top of the electric valve actuator. A support assembly is installed in the inner wall of the equipment frame. The support assembly includes a support plate installed in the middle of the inner wall of the equipment frame. The support assembly is used to support the top of the electric valve actuator. A rotary positioning assembly is installed at the bottom of the inner wall of the equipment frame. The rotary positioning assembly includes a base plate fixedly installed at the bottom of the inner wall of the equipment frame. The rotary positioning assembly is used for torque conversion of the electric valve actuator. A quick-connect assembly is installed at the bottom of the support plate. The quick-connect assembly includes a movable sleeve and is used to quickly assemble the rotary positioning assembly with the electric valve actuator. A synchronous torsion assembly is movably mounted on the top of the base plate. The synchronous torsion assembly includes a spline sleeve and is used to synchronously drive the rotary positioning assembly and the electric valve actuator after assembly.

[0008] Preferably, a fixing plate is fixedly installed in the inner wall of the equipment frame, the top pressure cylinder is fixedly installed on the top of the fixing plate, a connecting frame is fixedly installed at the telescopic end of the top pressure cylinder, a fixing frame is fixedly installed in the middle of the bottom surface of the fixing plate, and a lifting frame is slidably connected inside the fixing frame.

[0009] Preferably, the inner walls of the fixed frame are provided with sliding grooves on both sides, and multiple sets of support springs are fixedly installed at equal intervals between the top of the lifting frame and the top of the inner wall of the connecting frame. A stop plate is fixedly installed at the bottom of the lifting frame, and the stop plate matches the top shape of the electric valve actuator. The connecting frame and the two sides of the lifting frame slide in the corresponding sliding grooves. The bottom ends of the connecting frame extend movably through the top of the support plate to the bottom of the support plate, and the bottom ends of the lifting frame extend movably through the fixed frame to the top of the support plate.

[0010] Preferably, a stroke cylinder is fixedly installed at the top of the linear slide table away from the electric valve actuator. A force measuring block is fixedly installed at the telescopic end of the stroke cylinder. A pressure sensor is fixedly installed at the end of the force measuring block. The force measuring block slides on the top of the linear slide table. A lever is provided on the outside of the rotary positioning assembly. A U-shaped stop is slidably connected to the outside of the lever. The U-shaped stop is fixedly connected to the pressure sensor. A guide platform is fixedly installed on the top of the base plate near the linear slide table. The lever is located in a groove on the top of the guide platform with clearance fit. A proximity switch is fixedly installed in the middle of the bottom surface of the fixed plate. A controller is electrically connected between the proximity switch and the stroke cylinder.

[0011] Preferably, the electric valve actuator has an axial groove at its bottom, and multiple sets of support rods are fixedly installed at equal intervals on the circumference between the bottom of the support plate and the top of the base plate. A through groove is opened in the middle of the support plate, and stop grooves are opened on both sides of the top of the support plate. The flanges on both sides of the electric valve actuator correspond to the two sets of stop grooves respectively.

[0012] Preferably, a bearing is rotatably mounted at the top center of the rotary positioning assembly, a fixed shaft is fixedly mounted in the inner diameter of the bearing, a splined shaft is fixedly mounted on the top of the fixed shaft, the fixed shaft is rotatably mounted on the top of the base plate through the bearing, and the lever is fixedly mounted on the periphery of the fixed shaft near the torque testing assembly.

[0013] Preferably, the bottom ends of the connecting frame are fixedly connected to the outer sides of the movable sleeve, and an annular groove is formed on the inner diameter of the movable sleeve. Multiple sets of movable rods are movably connected through the inner wall of the annular groove at equal intervals. A wedge is fixedly installed at the inner end of the movable rod, and a return spring is fixedly installed between the wedge and the inner wall of the annular groove.

[0014] Preferably, the spline sleeve is slidably sleeved outside the spline shaft, the top of the spline sleeve is integrally formed with a through shaft, a rotating sleeve is fixedly installed on the outside of the spline sleeve, and a movable ring sleeve and a fixed ring sleeve are respectively provided at the top and bottom of the outer periphery of the rotating sleeve.

[0015] Preferably, the fixed ring is fixedly installed on the top periphery of the rotating sleeve, and the movable ring is slidably installed on the bottom periphery of the rotating sleeve. Both the movable ring and the fixed ring have isosceles trapezoidal side sections.

[0016] Preferably, in step S1, the electric valve actuator is placed on the support plate in the support assembly, and the top pressure cylinder in the top pressure assembly applies continuous pressure to the top of the electric valve actuator, while simultaneously connecting the quick-connect assembly and the rotary positioning assembly; in step S2, the movable sleeve in the quick-connect assembly quickly positions the synchronous torsion assembly on the top of the rotary positioning assembly, and drives the through shaft in the synchronous torsion assembly to assemble and position with the electric valve actuator. S3. The electric valve actuator's actuating structure drives the rotary positioning component to twist. Through the cooperation of the force measuring block and the pressure sensor, the torque of the electric valve actuator can be converted into the lever. The maximum torque of the electric valve actuator can be calculated by the length of the lever arm. S4. The top pressure cylinder in the top pressure assembly moves up periodically by a certain amount. Through the cooperation of the proximity switch and the controller, the stroke cylinder can change the sliding position of the force measuring block and the pressure sensor on the lever, thereby periodically changing the lever arm length and averaging multiple sets of arm data. S5. When the top pressure cylinder in the top pressure assembly moves down to its maximum stroke, the synchronous torsion assembly at the top of the quick-connect assembly and the rotary positioning assembly quickly separates, the lifting frame releases the pressure on the top of the electric valve actuator, and the next set of electric valve actuators to be tested is replaced.

[0017] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the electric valve actuator is placed directly inside the corresponding stop groove on the top of the support plate, completing the initial placement and positioning of the electric valve actuator. Subsequently, the top pressure cylinder works to push the connecting frame downward as a whole. During the downward movement of the connecting frame, the movable sleeves at both ends and the lifting frame at the bottom move downward simultaneously. When the lifting frame moves downward, the bottom abutment plate first fits against the top of the electric valve actuator. As the top pressure cylinder continues to push the connecting frame downward, the connecting frame applies downward pressure to the lifting frame through the support spring, thereby completing the pressing and positioning of the top of the electric valve actuator through the abutment plate. This enables rapid positioning of the electric valve actuator and avoids displacement of the electric valve actuator during the testing process, which would cause test force components and insufficient test accuracy.

[0018] In this invention, when the connecting frame moves downward, it simultaneously drives the movable sleeve to move downward to the outside of the through shaft. During the downward movement of the movable sleeve, multiple sets of wedges on the inner diameter are subjected to outward squeezing force from the fixed ring sleeve, which squeezes the corresponding movable rod outward, causing multiple sets of wedges to enter between the fixed ring sleeve and the movable ring sleeve. Under the reset of the return spring, the multiple wedges are engaged between the movable ring sleeve and the fixed ring sleeve and limited by the fixed ring sleeve. This completes the lifting of the entire synchronous torsion assembly. After the synchronous torsion assembly is lifted, the through shaft at the top is inserted upward into the axial groove at the bottom of the electric valve actuator, thereby completing the quick connection and fixation between the electric valve actuator and the rotary positioning assembly. There is no need to manually align and tighten the bolts for assembly, making the operation convenient. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the assembly structure of the electric valve actuator and the rotary positioning component in this invention; Figure 3 This is a schematic diagram of the top pressure assembly structure in this invention; Figure 4 This is a schematic diagram of the support component structure in this invention; Figure 5 This is a schematic diagram of the structure of the quick-connect component and the synchronous torsion component in this invention; Figure 6 This is a schematic diagram of the side cross-sectional structure of the movable sleeve and the internal spline sleeve in this invention; Figure 7 for Figure 6 A magnified view of the structure at point A in the middle; Figure 8 This is a schematic block diagram of the electric valve actuator testing equipment of the present invention; Figure 9 This is a flowchart of the valve actuator testing method of the present invention. In the diagram: 100, Equipment frame; 200, Torque testing assembly; 300, Top pressure assembly; 400, Electric valve actuator; 500, Support assembly; 600, Rotary positioning assembly; 700, Quick-connect assembly; 800, Synchronous torsion assembly; 11, Fixed plate; 21, Linear slide; 22, Stroke cylinder; 23, U-shaped stop; 24, Lever; 25, Guide table; 26, Proximity switch; 211, Force measuring block; 212, Pressure sensor; 31, Top pressure cylinder; 32, Fixed frame. 33. Connecting frame; 34. Lifting frame; 321. Slide groove; 341. Support spring; 342. Support plate; 41. Axial groove; 51. Support plate; 52. Stop groove; 53. Support rod; 54. Through groove; 61. Base plate; 62. Bearing; 63. Fixed shaft; 64. Splined shaft; 71. Movable sleeve; 72. Ring groove; 73. Movable rod; 74. Return spring; 75. Wedge block; 81. Splined sleeve; 82. Through shaft; 83. Rotating sleeve; 831. Movable ring sleeve; 832. Fixed ring sleeve. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. The embodiments described with respect to the reset spring are only some embodiments of the present invention, and not all embodiments.

[0021] Example 1

[0022] This embodiment provides a testing device and method for an electric valve actuator, such as... Figures 1-7 As shown, the device includes a frame 100 and an electric valve actuator 400, and also includes: Torque testing assembly 200 is installed on one side of the inner wall of equipment frame 100. Torque testing assembly 200 includes a linear slide 21 fixedly installed on one side of the inner wall of equipment frame 100. Torque testing assembly 200 is used to test the torque of electric valve actuator 400. The top pressure assembly 300 is installed on the top of the inner wall of the equipment frame 100. The top pressure assembly 300 includes a top pressure cylinder 31 installed on the top of the inner wall of the equipment frame 100. The top pressure assembly 300 is used to press and position the top of the electric valve actuator 400. A support assembly 500 is installed in the inner wall of the equipment frame 100. The support assembly 500 includes a support plate 51 installed in the middle of the inner wall of the equipment frame 100. The support assembly 500 is used to support the top of the electric valve actuator 400. A rotary positioning assembly 600 is installed on the bottom of the inner wall of the equipment frame 100. The rotary positioning assembly 600 includes a base plate 61 fixedly installed on the bottom of the inner wall of the equipment frame 100. The rotary positioning assembly 600 is used for torque conversion of the electric valve actuator 400.

[0023] A fixed plate 11 is fixedly installed in the inner wall of the equipment frame 100. A top-pressure cylinder 31 is fixedly installed on the top of the fixed plate 11. A connecting frame 33 is fixedly installed on the telescopic end of the top-pressure cylinder 31. A fixed frame 32 is fixedly installed in the middle of the bottom surface of the fixed plate 11. A lifting frame 34 is slidably connected inside the fixed frame 32. Slide grooves 321 are respectively opened on both sides of the inner wall of the fixed frame 32. Multiple sets of support springs 341 are fixedly installed at equal intervals between the top of the lifting frame 34 and the top of the inner wall of the connecting frame 33. A stop plate 342 is fixedly installed at the bottom of the lifting frame 34. The stop plate 342 matches the top shape of the electric valve actuator 400. The connecting frame 33 and the lifting frame 34 slide in the corresponding slide grooves 321 on both sides. The bottom ends of the connecting frame 33 extend through the top of the support plate 51 to the bottom of the support plate 51. The bottom ends of the lifting frame 34 extend through the fixed frame 32 to the top of the support plate 51. The electric valve actuator 400 is placed directly inside the corresponding stop groove 52 on the top of the support plate 51. Then, the top pressure cylinder 31 works to push the connecting frame 33 to move down as a whole. During the downward movement of the connecting frame 33, the movable sleeves 71 at both ends and the lifting frame 34 at the bottom move down synchronously. When the lifting frame 34 moves down, the bottom abutment plate 342 first fits against the top of the electric valve actuator 400. As the top pressure cylinder 31 continues to push the connecting frame 33 down, the connecting frame 33 applies downward pressure to the lifting frame 34 through the support spring 341, and then the abutment plate 342 completes the pressing and positioning of the top of the electric valve actuator 400. This enables the electric valve actuator 400 to be quickly positioned.

[0024] A stroke cylinder 22 is fixedly installed on the top of the linear slide 21, away from the electric valve actuator 400. A force measuring block 211 is fixedly installed on the telescopic end of the stroke cylinder 22, and a pressure sensor 212 is fixedly installed on the end of the force measuring block 211. The force measuring block 211 slides on the top of the linear slide 21. A lever 24 is provided on the outside of the rotary positioning assembly 600. A U-shaped stop 23 is slidably connected to the outside of the lever 24. The U-shaped stop 23 is fixedly connected to the pressure sensor 212. A guide platform 25 is fixedly installed on the top of the base plate 61 near the linear slide 21. The lever 24 is located in the groove at the top of the guide platform 25 with clearance fit. A proximity switch 26 is fixedly installed in the middle of the bottom surface of the fixed plate 11. A controller is electrically connected between the proximity switch 26 and the stroke cylinder 22. A control is provided at the bottom of the electric valve actuator 400. Axial groove 41, multiple sets of support rods 53 are fixedly installed at equal intervals on the circumference between the bottom of support plate 51 and the top of base plate 61. A through groove 54 is opened in the middle of support plate 51, and stop grooves 52 are opened on both sides of the top of support plate 51. The flanges on both sides of electric valve actuator 400 correspond to the two sets of stop grooves 52 respectively. After the torque test assembly 200 is assembled with the axial connecting parts of electric valve actuator 400, the fixed shaft 63 and the external lever 24 are rotated by the axial rotation of electric valve actuator 400. The lever 24 is guided by guide table 25 to squeeze pressure sensor 212 and force measuring block 211. The maximum torque of electric valve actuator 400 is tested by lever principle. The maximum torque of electric valve actuator 400 is tested by force measuring block 211 and pressure sensor 212.

[0025] In this embodiment, after the torque testing component 200 is assembled with the axial connecting part of the electric valve actuator 400, the fixed shaft 63 and the external lever 24 are twisted by the axial torsion of the electric valve actuator 400. Under the guidance of the guide table 25, the lever 24 squeezes the pressure sensor 212 and the force measuring block 211, thereby enabling the maximum torque of the electric valve actuator 400 to be tested through the lever principle. The technical solution of testing the maximum torque of the electric valve actuator 400 through the force measuring block 211 and the pressure sensor 212 is the prior art and will not be described in detail here.

[0026] In this embodiment, the electric valve actuator 400 is placed directly inside the stop groove 52 on the top of the support plate 51 to complete the initial placement and positioning of the electric valve actuator 400. Then, the top pressure cylinder 31 works to push the connecting frame 33 to move down as a whole. During the downward movement of the connecting frame 33, the movable sleeves 71 at both ends and the lifting frame 34 at the bottom move down synchronously. When the lifting frame 34 moves down, the bottom abutment plate 342 first fits against the top of the electric valve actuator 400. As the top pressure cylinder 31 continues to push the connecting frame 33 down, the connecting frame 33 applies downward pressure to the lifting frame 34 through the support spring 341, and then the abutment plate 342 completes the pressing and positioning of the top of the electric valve actuator 400. This can achieve rapid positioning of the electric valve actuator 400 and avoid displacement of the electric valve actuator 400 during the test, which would cause test force and make the test inaccurate.

[0027] In this embodiment, when the connecting frame 33 moves down, it simultaneously drives the movable sleeve 71 to move down to the outside of the through shaft 82. During the downward movement of the movable sleeve 71, multiple sets of wedges 75 on the inner diameter are subjected to outward squeezing force from the fixed ring sleeve 832, which squeezes the corresponding movable rod 73 outward, so that multiple sets of wedges 75 enter between the fixed ring sleeve 832 and the movable ring sleeve 831. Under the reset of the return spring 74, the multiple wedges 75 are engaged between the movable ring sleeve 831 and the fixed ring sleeve 832 and are limited by the fixed ring sleeve 832. This completes the overall lifting of the synchronous torsion assembly 800. After the synchronous torsion assembly 801 is lifted, the through shaft 82 at the top is inserted upward into the axial groove 41 at the bottom of the electric valve actuator 400, thereby completing the quick connection and fixation between the electric valve actuator 400 and the rotary positioning assembly 600. There is no need to manually align and tighten the bolts for assembly, making the operation convenient.

[0028] Example 2

[0029] Based on Example 1, this example provides an electric valve actuator testing device and testing method, such as... Figures 3-7 As shown, it includes: A quick-connect assembly 700 is installed at the bottom of the support plate 51. The quick-connect assembly 700 includes a movable sleeve 71 and is used to quickly assemble the rotary positioning assembly 600 with the electric valve actuator 400. The synchronous torsion assembly 800 is movably mounted on the top of the base plate 61. The synchronous torsion assembly 800 includes a spline sleeve 81 and is used to synchronously drive the rotary positioning assembly 600 and the electric valve actuator 400 after assembly.

[0030] The rotary positioning assembly 600 has a bearing 62 rotatably mounted at its top center. A fixed shaft 63 is fixedly mounted inside the bearing 62, and a splined shaft 64 is fixedly mounted on top of the fixed shaft 63. The fixed shaft 63 is rotatably mounted on the top of the base plate 61 via the bearing 62. A lever 24 is fixedly mounted on the outer side of the fixed shaft 63 near the torque testing assembly 200. The bottom ends of the connecting frame 33 are fixedly connected to the outer sides of the movable sleeve 71. An annular groove 72 is formed on the inner diameter of the movable sleeve 71. Multiple sets of movable rods 73 are movably connected at equal intervals through the inner wall of the annular groove 72. A wedge 75 is fixedly mounted on the inner end of the movable rod 73. A return spring 74 is fixedly mounted between the wedge 75 and the inner wall of the annular groove 72. During the downward movement of the movable sleeve 71... Multiple sets of wedges 75 on the inner diameter are subjected to outward extrusion force from the fixed ring sleeve 832, which pushes the corresponding movable rod 73 outward, causing the multiple sets of wedges 75 to enter between the fixed ring sleeve 832 and the movable ring sleeve 831. Under the reset of the return spring 74, the multiple wedges 75 are engaged between the movable ring sleeve 831 and the fixed ring sleeve 832 and are limited by the fixed ring sleeve 832. This completes the overall lifting of the synchronous torsion assembly 800. After the synchronous torsion assembly 801 is lifted, the through shaft 82 at the top is inserted upward into the axial groove 41 at the bottom of the electric valve actuator 400, thereby completing the quick connection and fixation between the electric valve actuator 400 and the rotary positioning assembly 600. There is no need to manually align and tighten the bolts for assembly, making the operation convenient.

[0031] The spline sleeve 81 is slidably sleeved on the outside of the spline shaft 64. A through shaft 82 is integrally formed on the top of the spline sleeve 81. A rotating sleeve 83 is fixedly installed on the outside of the spline sleeve 81. A movable ring sleeve 831 and a fixed ring sleeve 832 are respectively provided at the top and bottom of the outer periphery of the rotating sleeve 83. The fixed ring sleeve 832 is fixedly installed on the top periphery of the rotating sleeve 83, and the movable ring sleeve 831 is slidably installed on the bottom periphery of the rotating sleeve 83. Both the movable ring sleeve 831 and the fixed ring sleeve 832 have isosceles trapezoidal side sections. After all tests are completed, the top-pressure cylinder 31 drives the connecting frame 33 to move downwards to its maximum stroke, causing multiple sets of wedges 75 on the inner diameter of the movable sleeve 71. After being positioned by the bottom stop block of the movable ring 831, it is squeezed outward again and slid to the outer periphery of the movable ring 831. After multiple sets of wedges 75 are reset twice by the reset spring 74, they drive the movable sleeve 71 to move up to the fixed ring 832. The wedges 75 slide sequentially on the outer inclined surfaces of the movable ring 831 and the fixed ring 832 to the top of the outer periphery of the rotating sleeve 83, thereby releasing the positioning of the rotary positioning component 600. At this time, the synchronous torsion component 800 inside the rotary positioning component 600 slides down under gravity. At this time, the tested electric valve actuator 400 can be directly removed. The overall testing process is highly automated and easy to disassemble and assemble.

[0032] In this embodiment, the connecting frame 33 moves downward, allowing the movable sleeve 71 to connect with the rotary positioning component 600. Then, it lifts upward, causing the synchronous torsion component 800 at the top of the rotary positioning component 600 to quickly connect and assemble with the electric valve actuator 400. During this process, the support spring 341 remains compressed, ensuring that the lifting frame 34 consistently exerts downward pressure on the top of the electric valve actuator 400. This prevents the electric valve actuator 400 from shifting during assembly, ensuring accurate positioning of the through shaft 82 and axial groove 41, preventing connection failure. After one test... After completion, the extension end of the top pressure cylinder 31 drives the connecting frame 33 to move upward, changing the distance between the connecting frame 33 and the proximity switch 26. The proximity switch 26 sends a signal to the controller, which controls the stroke cylinder 22 to extend a certain stroke, causing the force measuring block 211 to drive the pressure sensor 212 and the U-shaped stop block 23 to move closer to the periphery of the rotary positioning component 600. This can periodically change the lever arm length of the lever principle during the test, thereby obtaining multiple sets of test data. By averaging the data, the data error caused by friction and material deformation can be reduced.

[0033] A testing method for an electric valve actuator testing device, characterized by comprising the following steps: S1. The electric valve actuator 400 is placed on the support plate 51 in the support assembly 500. The top pressure cylinder 31 in the top pressure assembly 300 applies continuous pressure to the top of the electric valve actuator 400, and at the same time connects the quick-connect assembly 700 and the rotary positioning assembly 600. S2. The movable sleeve 71 in the quick-connect assembly 700 quickly positions the synchronous torsion assembly 800 on the top of the rotary positioning assembly 600, and drives the through shaft 82 in the synchronous torsion assembly 800 to assemble and position with the electric valve actuator 400. S3. The electric valve actuator 400 drives the rotary positioning component 600 to twist. Through the cooperation of the force measuring block 211 and the pressure sensor 212, the torque of the electric valve actuator 400 can be converted to the lever 24. The maximum torque of the electric valve actuator 400 can be calculated by the lever arm length of the lever 24. S4. In the top pressure assembly 300, the top pressure cylinder 31 periodically moves upward by a certain amount. Through the proximity switch 26 and the controller, the stroke cylinder 22 can change the sliding position of the force measuring block 211 and the pressure sensor 212 on the lever 24, thereby periodically changing the lever arm length of the lever 24, and thus averaging multiple sets of lever arm data. S5, the top pressure cylinder 31 in the top pressure assembly 300 moves down to its maximum stroke, the quick connection assembly 700 and the synchronous torsion assembly 800 on the top of the rotary positioning assembly 600 quickly separate, the lifting frame 34 releases the pressure on the top of the electric valve actuator 400, and the next set of electric valve actuators 400 to be tested is replaced.

[0034] Working principle: When using this electric valve actuator testing equipment, the user first places the electric valve actuator 400 to be tested directly inside the two sets of stop grooves 52 on the top of the support plate 51. Then, the top pressure cylinder 31 works to push the connecting frame 33 to move down as a whole. During the downward movement of the connecting frame 33, the movable sleeves 71 at both ends and the lifting frame 34 at the bottom move down synchronously. When the lifting frame 34 moves down, the bottom abutment plate 342 first fits against the top of the electric valve actuator 400. As the top pressure cylinder 31 continues to push the connecting frame 33 down, the connecting frame 33 applies downward pressure to the lifting frame 34 through the support spring 341, and then the abutment plate 342 completes the pressing and positioning of the top of the electric valve actuator 400, so as to avoid the electric valve actuator 400 from shifting during the test and affecting the test accuracy.

[0035] Then, as the connecting frame 33 moves downward, it synchronously drives the movable sleeve 71 downward. During the process of the movable sleeve 71 being fitted onto the outside of the rotating sleeve 83, the multiple sets of wedges 75 on the inner diameter are subjected to the outward squeezing force of the fixed ring sleeve 832, pushing the corresponding movable rod 73 outward, so that the multiple sets of wedges 75 enter the annular groove 72. When the movable sleeve 71 moves to the position between the multiple sets of wedges corresponding to the movable ring sleeve 831 and the fixed ring sleeve 832, the return spring 74 pushes the wedges 75 to return and extend, and the multiple wedges 75 are engaged in the movable ring sleeve 831. The movable sleeve 71 is limited by the fixed ring 832, and after the movable sleeve 71 continues to move down with the connecting frame 33 to complete the positioning, the rotating sleeve 83 and the entire synchronous torsion assembly 800 are lifted synchronously, so that the through shaft 82 at the top of the synchronous torsion assembly 800 is inserted upward into the axial groove 41 at the bottom of the electric valve actuator 400, completing the synchronous transmission connection between the output shaft of the electric valve actuator 400 and the rotary positioning assembly 600. There is no need to manually align and tighten the bolts for assembly, making the operation convenient.

[0036] Then, the output shaft of the electric valve actuator 400 is turned. The output shaft drives the spline sleeve 81, spline shaft 64 and fixed shaft 63 to turn as a whole through the through shaft 82. The rotation of the fixed shaft 63 drives the outer lever 24 to turn. The lever 24 rotates around the center of the fixed shaft 63. The outer end of the lever 24 presses the U-shaped stop 23 and the pressure sensor 212 with a certain torque. The pressure sensor 212 collects pressure data, and the output torque of the electric valve actuator 400 can be calculated by cooperating with the lever arm to complete a single test. After one test is completed, the extension end of the top pressure cylinder 31 drives the connecting frame 33 to move slightly upward, changing the distance between the connecting frame 33 and the proximity switch 26. The proximity switch 26 sends a signal to the controller, which controls the stroke cylinder 22 to extend the corresponding stroke, driving the force measuring block 211, pressure sensor 212 and U-shaped stop block 23 to move towards the rotation positioning component 600, changing the lever arm length. The second set of test data can be obtained by performing the test again. After multiple adjustments, multiple sets of test data can be obtained. Taking the average of the data can reduce the error caused by friction and material deformation, and improve the test accuracy.

[0037] After all tests are completed, the top pressure cylinder 31 drives the connecting frame 33 to move downward to its maximum stroke. This causes multiple sets of wedges 75 on the inner diameter of the movable sleeve 71 to be positioned by the bottom stop block of the movable ring sleeve 831 and then squeezed outward again, sliding to the outer periphery of the movable ring sleeve 831. After the multiple sets of wedges 75 are reset for the second time by the return spring 74, the movable sleeve 71 is moved upward to the fixed ring sleeve 832. The wedges 75 slide sequentially on the outer inclined surfaces of the movable ring sleeve 831 and the fixed ring sleeve 832 to the top of the outer periphery of the rotating sleeve 83, thereby releasing the positioning of the rotary positioning component 600. At this time, the synchronous torsion component 800 inside the rotary positioning component 600 slides down under gravity. At this point, the tested electric valve actuator 400 can be directly removed. The overall testing process is highly automated, easy to disassemble and assemble, and effectively improves the torque testing efficiency of the electric valve actuator.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications 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. An electric valve actuator testing device, comprising a frame (100) and an electric valve actuator (400), characterized in that, Also includes: Torque testing assembly (200) is installed on one side of the inner wall of the equipment frame (100). The torque testing assembly (200) includes a linear slide (21) fixedly installed on one side of the inner wall of the equipment frame (100). The torque testing assembly (200) is used to test the torque of the electric valve actuator (400). A top-pressing assembly (300) is installed on the top of the inner wall of the equipment frame (100). The top-pressing assembly (300) includes a top-pressing cylinder (31) installed on the top of the inner wall of the equipment frame (100). The top-pressing assembly (300) is used to press and position the top of the electric valve actuator (400). A support assembly (500) is installed in the inner wall of the equipment frame (100). The support assembly (500) includes a support plate (51) installed in the middle of the inner wall of the equipment frame (100). The support assembly (500) is used to support the top of the electric valve actuator (400). A rotary positioning assembly (600) is installed on the bottom of the inner wall of the equipment frame (100). The rotary positioning assembly (600) includes a base plate (61) fixedly installed on the bottom of the inner wall of the equipment frame (100). The rotary positioning assembly (600) is used for torque conversion of the electric valve actuator (400).

2. The electric valve actuator testing device according to claim 1, characterized in that: It also includes a quick-connect assembly (700) installed at the bottom of the support plate (51), the quick-connect assembly (700) including a movable sleeve (71), the quick-connect assembly (700) being used to quickly assemble the rotary positioning assembly (600) with the electric valve actuator (400); A synchronous torsion assembly (800) is movably mounted on the top of the base plate (61). The synchronous torsion assembly (800) includes a spline sleeve (81). The synchronous torsion assembly (800) is used to synchronously drive the rotary positioning assembly (600) and the electric valve actuator (400) after assembly. A fixed plate (11) is fixedly installed in the inner wall of the equipment frame (100). The top pressure cylinder (31) is fixedly installed on the top of the fixed plate (11). A connecting frame (33) is fixedly installed at the telescopic end of the top pressure cylinder (31). A fixed frame (32) is fixedly installed in the middle of the bottom surface of the fixed plate (11). A lifting frame (34) is slidably connected inside the fixed frame (32).

3. The electric valve actuator testing equipment according to claim 2, characterized in that: The inner walls of the fixed frame (32) are respectively provided with sliding grooves (321). Multiple sets of support springs (341) are fixedly installed at equal intervals between the top of the lifting frame (34) and the top of the inner wall of the connecting frame (33). A stop plate (342) is fixedly installed at the bottom of the lifting frame (34). The stop plate (342) matches the top shape of the electric valve actuator (400). The connecting frame (33) and the two sides of the lifting frame (34) slide in the corresponding sliding grooves (321). The bottom ends of the connecting frame (33) extend through the top of the support plate (51) to the bottom of the support plate (51). The bottom ends of the lifting frame (34) extend through the fixed frame (32) to the top of the support plate (51).

4. The electric valve actuator testing equipment according to claim 3, characterized in that: A stroke cylinder (22) is fixedly installed at the top of the linear slide (21) away from the electric valve actuator (400). A force measuring block (211) is fixedly installed at the extension end of the stroke cylinder (22). A pressure sensor (212) is fixedly installed at the end of the force measuring block (211). The force measuring block (211) slides on the top of the linear slide (21). A lever (24) is provided on the outside of the rotary positioning assembly (600). A U-shaped stop (23) is slidably connected to the outside of the lever (24). The U-shaped stop (23) is fixedly connected to the pressure sensor (212). A guide platform (25) is fixedly installed on the top of the base plate (61) near the linear slide (21). The lever (24) is located in the groove at the top of the guide platform (25) with clearance fit. A proximity switch (26) is fixedly installed in the middle of the bottom surface of the fixed plate (11). A controller is electrically connected between the proximity switch (26) and the stroke cylinder (22).

5. The electric valve actuator testing device according to claim 4, characterized in that: The electric valve actuator (400) has an axial groove (41) at its bottom. Multiple sets of support rods (53) are fixedly installed at equal intervals on the circumference between the bottom of the support plate (51) and the top of the base plate (61). A through groove (54) is opened in the middle of the support plate (51). Stop grooves (52) are opened on both sides of the top of the support plate (51). The flanges on both sides of the electric valve actuator (400) correspond to the two sets of stop grooves (52).

6. The electric valve actuator testing device according to claim 5, characterized in that: A bearing (62) is rotatably mounted at the top center of the rotary positioning assembly (600). A fixed shaft (63) is fixedly mounted in the inner diameter of the bearing (62). A spline shaft (64) is fixedly mounted on the top of the fixed shaft (63). The fixed shaft (63) is rotatably mounted on the top of the base plate (61) through the bearing (62). The lever (24) is fixedly mounted on the periphery of the fixed shaft (63) near the torque testing assembly (200).

7. The electric valve actuator testing device according to claim 6, characterized in that: The bottom ends of the connecting frame (33) are fixedly connected to the outer sides of the movable sleeve (71). The inner diameter of the movable sleeve (71) is provided with an annular groove (72). Multiple sets of movable rods (73) are movably connected at equal intervals on the inner wall of the annular groove (72). A wedge (75) is fixedly installed at the inner end of the movable rod (73). A return spring (74) is fixedly installed between the wedge (75) and the inner wall of the annular groove (72).

8. The electric valve actuator testing device according to claim 7, characterized in that: The spline sleeve (81) is slidably sleeved outside the spline shaft (64). The top of the spline sleeve (81) is integrally formed with a through shaft (82). A rotating sleeve (83) is fixedly installed outside the spline sleeve (81). The top and bottom of the outer periphery of the rotating sleeve (83) are respectively provided with a movable ring sleeve (831) and a fixed ring sleeve (832).

9. The electric valve actuator testing device according to claim 8, characterized in that: The fixed ring (832) is fixedly installed on the top periphery of the rotating sleeve (83), and the movable ring (831) is slidably installed on the bottom periphery of the rotating sleeve (83). The side sections of the movable ring (831) and the fixed ring (832) are both isosceles trapezoidal structures.

10. The test method for an electric valve actuator test device according to any one of claims 1-9, characterized in that, Includes the following steps: S1. The electric valve actuator (400) is placed on the support plate (51) in the support assembly (500), and the top pressure cylinder (31) in the top pressure assembly (300) applies continuous pressure to the top of the electric valve actuator (400), while connecting the quick-connect assembly (700) and the rotary positioning assembly (600). S2. The movable sleeve (71) in the quick-connect assembly (700) quickly positions the synchronous torsion assembly (800) on the top of the rotary positioning assembly (600), and drives the through shaft (82) in the synchronous torsion assembly (800) to assemble and position with the electric valve actuator (400); S3. The electric valve actuator (400) drives the rotary positioning component (600) to twist. Through the cooperation of the force measuring block (211) and the pressure sensor (212), the torque of the electric valve actuator (400) can be converted to the lever (24). The maximum torque of the electric valve actuator (400) can be calculated by the lever arm length of the lever (24). S4. In the top pressure assembly (300), the top pressure cylinder (31) periodically moves upward by a certain amount. Through the proximity switch (26) and the controller, the stroke cylinder (22) can change the sliding position of the force measuring block (211) and the pressure sensor (212) on the lever (24), thereby periodically changing the lever arm length of the lever (24), and thus averaging multiple sets of lever arm data. S5. The top pressure cylinder (31) in the top pressure assembly (300) moves down to its maximum stroke, the quick connection assembly (700) and the synchronous torsion assembly (800) on the top of the rotary positioning assembly (600) quickly separate, the lifting frame (34) releases the pressure on the top of the electric valve actuator (400), and the next set of electric valve actuators (400) to be tested is replaced.

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