Valve actuator multi-dimensional position detection device with temperature and pressure compensation

Abstract

This invention discloses a multi-dimensional position detection device for valve actuators with temperature and pressure compensation, belonging to the technical field of valve testing equipment. It includes a detection mechanism, a limiting mechanism, and a stabilizing mechanism installed within a testing chamber. The limiting mechanism comprises a fixing plate, multiple sets of limiting components, and a driving component. The stabilizing mechanism, installed within the testing chamber, utilizes the power of the driving component to drive itself, thereby pressing and fixing the valve actuator. The multi-dimensional position detection device for valve actuators with temperature and pressure compensation in this invention, by setting up the limiting and stabilizing mechanisms, allows multiple sets of limiting components and the stabilizing mechanism to operate simultaneously when the driving component is running, achieving sequential linkage between horizontal fixation of the valve actuator and vertical pressing of the housing. Compared to traditional step-by-step clamping methods, this significantly improves clamping efficiency and eliminates the cumulative errors caused by step-by-step operations.

Description

Technical Field

[0001] This invention belongs to the technical field of valve testing equipment, and particularly relates to a multi-dimensional position detection device for valve actuators with temperature and pressure compensation. Background Technology

[0002] As the core actuator of industrial fluid control systems, valve actuators directly determine the stability and safety of pipeline media transportation through their position control accuracy, and are widely used in key fields such as petrochemicals, power, and municipal water supply and drainage. With the improvement of industrial automation, higher requirements are placed on the position detection accuracy, operating condition adaptability, and fault prediction capabilities of valve actuators. Currently, for clamping and positioning, the industry generally adopts a solution of flange bolt fastening combined with V-block support, supplemented by manual pressure plates to achieve multi-degree-of-freedom constraints.

[0003] However, existing valve actuator testing devices still have some shortcomings in engineering applications. For example, the clamping system often uses a combination of locating pins and bolts for clamping, which results in low clamping efficiency. Furthermore, the cumulative error generated by step-by-step clamping is directly transmitted to the measurement link, increasing the detection error. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-dimensional position detection device for valve actuators with temperature and pressure compensation, which solves the technical problem of low clamping efficiency caused by the use of a combination of locating pins and bolts in existing clamping systems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A multi-dimensional position detection device for valve actuators with temperature and pressure compensation includes a detection mechanism, a limiting mechanism, and a stabilizing mechanism installed in a detection box. The limiting mechanism includes: a fixed plate installed in the detection box; multiple sets of limiting components, all slidably connected to the fixed plate, for cooperating with the flange of the valve actuator to position and lock the valve actuator in the horizontal direction; and a drive component for synchronously driving the multiple sets of limiting components to move axially. The stabilizing mechanism is installed in the detection box and is used to drive itself to move in the vertical direction through the power output from the drive component, thereby applying preload pressure to the top of the valve actuator.

[0006] Preferably, the limiting component includes: a movable cylinder slidably connected to the fixed plate, with multiple through holes evenly distributed circumferentially on its side wall; a threaded cylinder fixedly connected to the movable cylinder; multiple horizontal plates, all located inside the movable cylinder, with a movable plate and a bent plate mounted on the horizontal plates, the movable plate being located within the through holes; multiple second springs for connecting the horizontal plates and the inner walls of the movable cylinder; a hollow cylinder located between the multiple horizontal plates, with a tapered head at one end near the bent plate, and a connecting rod mounted at the other end of the tapered head; a threaded rod passing through the threaded cylinder and threadedly connected to the threaded cylinder, and fixedly connected to the connecting rod; and a gear fixedly sleeved on the portion of the threaded rod located outside the movable cylinder.

[0007] Preferably, the limiting component further includes: a plurality of crossbars, each fixedly connected to the end of the hollow cylinder away from the conical head; and a push plate, located inside the movable cylinder, fixedly connected to the plurality of crossbars.

[0008] Preferably, the limiting component further includes: a sealing plate, which is fixedly connected to the end of the movable cylinder away from the threaded cylinder; and a fixing rod, which is fixedly connected to the sealing plate and inserted into the hollow cylinder.

[0009] Preferably, the drive assembly includes: a rotating shaft passing through one side of the detection box and rotatably connected to the detection box; a turntable located outside the detection box and fixedly connected to the rotating shaft; a gear ring post located inside the detection box, fixedly connected to the rotating shaft, meshing with a plurality of gears, the axial length of which is greater than the thickness of the gears; and a first bevel gear fixedly sleeved on the rotating shaft.

[0010] Preferably, the stabilizing mechanism includes: a lead screw, rotatably mounted on the inner wall of the testing box via a mounting base; a second bevel gear, mounted on the lower end of the lead screw and meshing with the first bevel gear; a lead screw nut, sleeved on the lead screw; a lifting plate, fixedly sleeved on the lead screw nut; a guide plate, mounted on the inner top surface of the testing box, penetrating the lifting plate and slidably connected to it; a pressure plate, located directly below the lifting plate; multiple third springs for connecting the pressure plate and the lifting plate; and multiple guide posts, all mounted on the top surface of the pressure plate, penetrating the lifting plate and slidably connected to it.

[0011] Preferably, the detection mechanism includes: a movable frame, which is slidably connected to the bottom surface of the detection box and has a cavity inside; a first electric push rod, which is installed on the inner wall of the detection box and whose extension end is fixedly connected to the movable frame; two movable frames, both of which are slidably connected to the movable frame; and two follower plates, which are rotatably connected to the movable frames through shafts, and angle sensors are installed on the shafts.

[0012] Preferably, the detection mechanism further includes: two telescopic rods, both installed in the cavity of the movable frame, with the extension ends of the two telescopic rods fixedly connected to the two movable frames respectively; two first springs, respectively sleeved on the two telescopic rods; a limiting plate, slidably connected to the movable frame; and a second electric push rod, installed on the top surface of the movable frame, with its extension end fixedly connected to the limiting plate.

[0013] Preferably, it also includes: a display controller, installed on the front of the testing box; and two box doors, both hinged to the testing box.

[0014] Preferably, it further includes a heater installed inside the detection chamber for regulating the temperature inside the detection chamber.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The multi-dimensional position detection device for valve actuator with temperature and pressure compensation in this invention, by setting a limiting mechanism and a stabilizing mechanism, can simultaneously drive multiple sets of limiting components and stabilizing mechanisms when the drive component is running, thereby realizing the sequential linkage of fixing the valve actuator horizontally and pressing the housing vertically; compared with the traditional step-by-step clamping method, it significantly improves the clamping efficiency and eliminates the cumulative error caused by step-by-step operation.

[0016] 2. The limiting mechanism in this invention sets up multiple sets of limiting components and driving components. In the initial state of the limiting components, the movable plate is retracted into the through hole. When the limiting components pass through the flange hole, the conical head pushes the movable plate out and fits the flange, thereby realizing the rapid positioning and locking of the valve actuator flange and improving the fixing efficiency of the valve actuator. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the multi-dimensional position detection device for valve actuators with temperature and pressure compensation in this invention; Figure 2 This is a three-dimensional schematic diagram of the internal structure of the detection box in this invention; Figure 3 This is a front view of the internal structure of the detection box in this invention; Figure 4 This is a schematic diagram of the multi-dimensional position detection device for valve actuators with temperature and pressure compensation without a detection box in this invention; Figure 5This is a schematic diagram of the assembly structure of the limiting mechanism and the stabilizing mechanism in this invention; Figure 6 This is a perspective view of the limiting mechanism in this invention; Figure 7 This is a perspective view of the limiting component in this invention; Figure 8 In this invention Figure 7 Exploded view; Figure 9 This is a schematic diagram of the butterfly plate in this invention; Figure 10 This is a perspective view of the detection mechanism in this invention; Figure 11 This is a schematic diagram of the assembly structure of the movable frame, follower plate, angle sensor, telescopic rod and first spring in this invention; Reference numerals: 100, Detection box; 101, Display controller; 102, Box door; 110, Detection mechanism; 111, Moving frame; 112, First electric push rod; 113, Movable frame; 114, Follower plate; 115, Angle sensor; 116, Telescopic rod; 117, First spring; 118, Limiting plate; 119, Second electric push rod; 200, Heater; 300, Limiting mechanism; 301, Fixed plate; 310, Limiting assembly; 311, Moving cylinder; 3111, Guide strip; 3112, Through hole; 312, Threaded cylinder; 313, Sealing plate; 314, Fixed rod; 315, Horizontal plate; 3151, Movable plate; 3152, Bend Plate; 3153, Second Spring; 316, Hollow Cylinder; 3161, Conical Head; 3162, Connecting Rod; 317, Threaded Rod; 318, Gear; 319, Push Plate; 3191, Crossbar; 320, Drive Assembly; 321, Rotating Shaft; 322, Turntable; 323, Gear Ring Column; 324, First Bevel Gear; 400, Stabilizing Mechanism; 401, Lead Screw; 402, Mounting Base; 403, Second Bevel Gear; 404, Lead Screw Nut; 405, Lifting Plate; 406, Guide Plate; 407, Pressure Plate; 408, Third Spring; 409, Guide Column; 500, Valve Actuator; 501, Flange; 502, Flange Hole; 503, Butterfly Plate. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0021] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0022] This invention is described in detail with reference to the accompanying drawings. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not to scale. Furthermore, the accompanying drawings are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0023] Furthermore, it should be noted in the description of this invention that the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Example 1: As Figures 1 to 5 As shown, the multi-dimensional position detection device for valve actuators with temperature and pressure compensation includes a detection mechanism 110, a limiting mechanism 300, and a stabilizing mechanism 400 installed in a detection box 100. The limiting mechanism 300 includes a fixing plate 301, multiple sets of limiting components 310, and a drive assembly 320. The fixing plate 301 is installed inside the detection box 100; the multiple sets of limiting components 310 are all slidably connected to the fixing plate 301, and the multiple sets of limiting components 310 are used to fix the valve actuator 500 on the fixing plate 301; the drive assembly 320 is used to drive the multiple sets of limiting components 310 to move simultaneously.

[0026] A stabilizing mechanism 400 is installed inside the detection box 100. The stabilizing mechanism 400 is driven by the power of the drive assembly 320 to press and fix the valve actuator 500. Two flanges 501 are installed on the valve actuator 500, and multiple flange holes 502 are provided through the flanges 501. A butterfly plate 503 is rotatably installed inside the valve actuator 500. The valve actuator 500 uses an existing mature product, and its basic driving principle is not within the scope of this invention and will not be described in detail here.

[0027] A display controller 101 is installed on the front of the testing box 100. Two doors 102 are hinged to the front of the testing box 100, and each door 102 is equipped with a handle. A heater 200 is also installed inside the testing box 100. The heater 200 is used to regulate the temperature inside the testing box 100, thereby facilitating the testing of the valve actuator 500 at different temperatures.

[0028] The test chamber 100 is also equipped with a pressure sensor, a miniature air pump and a pressure relief valve (not shown). The target pressure value is set by the display controller 101, which facilitates the testing of the valve actuator 500 under different pressures.

[0029] Specifically, by placing the valve actuator 500 inside the testing box 100, by passing multiple limit components 310 through the flange holes 502 on the flange 501, and then by driving the drive component 320 to drive the multiple limit components 310 to move simultaneously, thereby causing the multiple limit components 310 to pull the flange 501 of the valve actuator 500 simultaneously, causing the flange 501 to move closer to the fixing plate 301 and finally fit against the fixing plate 301; Furthermore, when the drive component 320 is running, it will also drive the stabilizing mechanism 400 to move, thereby causing the stabilizing mechanism 400 to press the valve actuator 500 and fix the valve actuator 500 by cooperating with the inner bottom surface of the detection box 100; in subsequent detection of the valve actuator 500, the accuracy of the detection can be avoided due to the displacement of the valve actuator 500.

[0030] like Figures 6 to 8 As shown, the limiting assembly 310 includes a movable cylinder 311, a threaded cylinder 312, multiple horizontal plates 315, multiple second springs 3153, a threaded rod 317, and a gear 318.

[0031] The movable cylinder 311 is slidably connected to the fixed plate 301. A guide strip 3111 is installed on the movable cylinder 311, and a guide groove matching the guide strip 3111 is formed on the fixed plate 301. Multiple through holes 3112 are formed on the movable cylinder 311. A threaded cylinder 312 is fixedly connected to the movable cylinder 311. Multiple horizontal plates 315 are located inside the movable cylinder 311. A movable plate 3151 and a bent plate 3152 are installed on each horizontal plate 315, with the movable plate 3151 located within the through hole 3112. Multiple second springs 3153 are used to connect the horizontal plates 315 and the inner walls of the movable cylinder 311. A hollow cylinder 316 is located between the multiple horizontal plates 315, with the hollow cylinder 316 close to the bent plate 3152. One end is provided with a tapered head 3161, and the other end of the tapered head 3161 is equipped with a connecting rod 3162; a threaded rod 317 passes through a threaded cylinder 312 and is threadedly connected to the threaded cylinder 312, and the threaded rod 317 is fixedly connected to the connecting rod 3162; a gear 318 is fixedly sleeved on the part of the threaded rod 317 located outside the movable cylinder 311; in the initial state, the movable plate 3151 is retracted into the through hole 3112, and the movable cylinder 311 of the limiting assembly 310 can pass through the flange hole 502.

[0032] Specifically, since the threaded rod 317 is threadedly connected to the threaded cylinder 312, it will also move while rotating. When the threaded rod 317 moves, it will drive the connecting rod 3162, the conical head 3161 and the hollow cylinder 316 to move. When the conical head 3161 moves towards the bending plate 3152, it will push the movable plate 3151 connected to the bending plate 3152 to move, thereby causing multiple horizontal plates 315 to move towards the edge of the movable cylinder 311, and thus causing multiple movable plates 3151 to protrude from the through hole 3112. Since the movable plates 3151 protrude from the through hole 3112, the limiting component 310 cannot pass through the flange hole 502 of the flange 501.

[0033] like Figure 7 and Figure 8 As shown, the limiting assembly 310 also includes multiple crossbars 3191 and a push plate 319. The multiple crossbars 3191 are all fixedly connected to the end of the hollow cylinder 316 away from the conical head 3161; the push plate 319 is located inside the movable cylinder 311, and the push plate 319 is fixedly connected to the multiple crossbars 3191. When the push plate 319 moves toward the curved plate 3152, the push plate 319 will contact the movable plate 3151.

[0034] Specifically, when multiple movable plates 3151 protrude from the through hole 3112, the threaded rod 317 continues to rotate. The threaded rod 317 will drive the connecting rod 3162, the conical head 3161, and the hollow cylinder 316 to move, which in turn drives multiple crossbars 3191 and push plate 319 to move. The moving push plate 319 will push the movable plate 3151 to move, which in turn pushes multiple crossbars 315 and the movable cylinder 311 to move. In turn, the movable cylinder 311 and multiple movable plates 3151 pull the flange 501 of the valve actuator 500 closer to the fixed plate 301.

[0035] like Figure 7 and Figure 8 As shown, the limiting assembly 310 also includes a sealing plate 313 and a fixing rod 314. The sealing plate 313 is fixedly connected to the end of the movable cylinder 311 away from the threaded cylinder 312; the fixing rod 314 is fixedly connected to the sealing plate 313 and is inserted into the hollow cylinder 316.

[0036] Specifically, by setting the fixing rod 314, the hollow cylinder 316 can be supported, thereby improving the stability of the hollow cylinder 316.

[0037] like Figure 6 As shown, the drive assembly 320 includes a rotating shaft 321, a turntable 322, a gear ring post 323, and a first bevel gear 324. The rotating shaft 321 passes through one side of the detection box 100 and is rotatably connected to the detection box 100; the turntable 322 is located outside the detection box 100 and is fixedly connected to the rotating shaft 321; the gear ring post 323 is located inside the detection box 100 and is fixedly connected to the rotating shaft 321, and the gear ring post 323 meshes with multiple gears 318; the axial length of the gear ring post 323 is greater than the thickness of the gears 318. The first bevel gear 324 is fixedly sleeved on the rotating shaft 321.

[0038] Specifically, when the turntable 322 is rotated, it will drive the rotating shaft 321 to rotate, which in turn drives the gear ring column 323 to rotate, which in turn meshes with and drives multiple gears 318 to rotate. When the gears 318 rotate, they will drive the threaded rod 317 to rotate and move. However, since the axial length of the gear ring column 323 is greater than the thickness of the gear 318, when the threaded rod 317 drives the gear 318 to move, the gear 318 still maintains meshing with the gear ring column 323.

[0039] like Figure 5As shown, the stabilizing mechanism 400 includes a lead screw 401, a second bevel gear 403, a lead screw nut 404, a lifting plate 405, a guide plate 406, a pressure plate 407, multiple third springs 408, and multiple guide columns 409. The lead screw 401 is rotatably mounted on the inner wall of the test box 100 via the mounting base 402; the second bevel gear 403 is mounted on the lower end of the lead screw 401, and the second bevel gear 403 meshes with the first bevel gear 324; the lead screw nut 404 is sleeved on the lead screw 401; the lifting plate 405 is fixedly sleeved on the lead screw nut 404; the guide plate 406 is vertically fixed to the inner top surface of the test box 100, and its lower end passes through the lifting plate 405 and slides with the lifting plate 405; the pressure plate 407 is located directly below the lifting plate 405; multiple third springs 408 are used to connect the pressure plate 407 and the lifting plate 405; multiple guide posts 409 are all mounted on the top surface of the pressure plate 407, and the multiple guide posts 409 all pass through the lifting plate 405 and slide with the lifting plate 405. Among them, the third spring 408 is a compression spring with a pre-compression of 5-8mm. When the pressure plate 407 contacts the top surface of the valve actuator 500, the spring is further compressed to generate a pre-tightening pressure of 10-15N, which not only achieves fixation but also avoids damaging the outer shell of the valve actuator 500.

[0040] Specifically, when the first bevel gear 324 rotates, it meshes with and drives the second bevel gear 403 to rotate, which in turn drives the lead screw 401 to rotate. When the lead screw 401 rotates, the lead screw nut 404 moves vertically, which in turn drives the lifting plate 405 to move, and then drives the pressure plate 407 to move through multiple third springs 408. If the lead screw nut 404 moves downward, it will drive the pressure plate 407 to move downward, which will cause the pressure plate 407 to contact the valve actuator 500 and press the valve actuator 500, thereby further fixing the valve actuator 500.

[0041] like Figures 9 to 11 As shown, the detection mechanism 110 includes a movable frame 111, a first electric push rod 112, two movable frames 113, and two follower plates 114. The movable frame 111 is slidably connected to the bottom surface of the detection box 100, and a cavity is formed inside the movable frame 111. The first electric push rod 112 is installed on the inner wall of the detection box 100, and its extended end is fixedly connected to the movable frame 111. Both movable frames 113 are slidably connected to the movable frame 111. Both movable frames 113 are aligned with the butterfly plate 503 of the valve actuator 500. The follower plates 114 are rotatably connected to the movable frames 113 via shafts, and angle sensors 115 are installed on the shafts. The angle sensors 115 are absolute encoders and are electrically connected to the display controller 101 to transmit the shaft rotation angle data in real time.

[0042] Specifically, by activating the first electric push rod 112, the moving frame 111 is driven to move closer to the valve actuator 500, thereby moving the two follower plates 114 into the valve actuator 500 and making the two follower plates 114 contact the butterfly plate 503 of the valve actuator 500.

[0043] Then, by starting the valve actuator 500 and controlling the butterfly plate 503 to rotate by a specified angle, such as controlling the butterfly plate 503 to rotate by 20°, when the butterfly plate 503 rotates, it will drive the two follower plates 114 to rotate synchronously with the butterfly plate 503. At this time, the angle sensor 115 will measure the angle of rotation of the shaft and the follower plate 114. If the angle data measured by both angle sensors 115 is 20°, it indicates that the valve actuator 500 is normal. If the angle data measured by the two angle sensors 115 is the same, but not 20°, and the difference from 20° is large, it indicates that the valve actuator 500 is abnormal. That is, the angle at which the valve actuator 500 controls the butterfly plate 503 to rotate has an error compared with the actual angle at which the butterfly plate 503 rotates, and the error is greater than the allowable error range. If the difference in measurement data between the two angle sensors 115 exceeds the preset threshold, for example, if the deviation is greater than 0.5°, it is necessary to check the fitting deviation of the detection mechanism 110 or the flatness error of the end face of the butterfly plate 503 of the valve actuator 500.

[0044] like Figure 10 and Figure 11 As shown, the detection mechanism 110 also includes two telescopic rods 116, two first springs 117, a limiting plate 118, and a second electric push rod 119. Both telescopic rods 116 are installed inside the cavity of the movable frame 111, and their extended ends are fixedly connected to the two movable frames 113 respectively. The two first springs 117 are respectively sleeved on the two telescopic rods 116. The limiting plate 118 is slidably connected to the movable frame 111. The second electric push rod 119 is installed on the top surface of the movable frame 111, and its extended end is fixedly connected to the limiting plate 118.

[0045] Specifically, by setting the telescopic rod 116 and the first spring 117, when the butterfly plate 503 rotates, the telescopic rod 116 and the first spring 117 allow the movable frame 113 to move, thereby making the follower plate 114 fit better with the butterfly plate 503.

[0046] When it is necessary to fix the position of the movable frame 113, the second electric push rod 119 is activated to drive the limiting plate 118 to move downward, thereby causing the limiting plate 118 to squeeze the two movable frames 113, so that the movable frame 113 cannot move.

[0047] Working principle: In actual use, the valve actuator 500 is placed inside the detection box 100. In the initial state, the movable plate 3151 is retracted into the through hole 3112. By having the moving cylinders 311 of the multiple limit components 310 pass through the flange holes 502 on the flange 501, the valve actuator 500 is positioned below the pressure plate 407.

[0048] Then, by rotating the turntable 322, the rotating shaft 321 is driven to rotate, which in turn drives the gear ring column 323 to rotate, which in turn meshes and drives multiple gears 318 to rotate. When the gears 318 rotate, they will drive the threaded rod 317 to rotate. Since the threaded rod 317 is threadedly connected to the threaded cylinder 312, it will also move while rotating. When the threaded rod 317 moves, it will drive the connecting rod 3162, the conical head 3161 and the hollow cylinder 316 to move. When the conical head 3161 moves towards the bending plate 3152, it will push the movable plate 3151 connected to the bending plate 3152 to move, which will cause multiple horizontal plates 315 to move towards the edge of the movable cylinder 311, which will cause multiple movable plates 3151 to protrude from the through hole 3112. Since the movable plates 3151 protrude from the through hole 3112 at this time, the limiting component 310 cannot pass through the flange hole 502 of the flange 501.

[0049] As the turntable 322 continues to rotate, it drives the threaded rod 317 to rotate. The threaded rod 317 drives the connecting rod 3162, the conical head 3161, and the hollow cylinder 316 to move, which in turn drives multiple crossbars 3191 and push plates 319 to move. The moving push plates 319 push the movable plate 3151 to move, which in turn pushes multiple crossbars 315 and movable cylinders 311 to move. Then, through the movable cylinders 311 and multiple movable plates 3151, the flange 501 of the valve actuator 500 is pulled closer to the fixed plate 301, so that multiple sets of limit components 310 simultaneously pull the flange 501 of the valve actuator 500, so that the flange 501 moves closer to the fixed plate 301 and finally fits against the fixed plate 301.

[0050] When the first bevel gear 324 rotates, it meshes with and drives the second bevel gear 403 to rotate, which in turn drives the lead screw 401 to rotate. When the lead screw 401 rotates, the lead screw nut 404 moves vertically, which in turn drives the lifting plate 405 to move, and then drives the pressure plate 407 to move through multiple third springs 408. If the lead screw nut 404 moves downward, it will drive the pressure plate 407 to move downward, which will cause the pressure plate 407 to contact the valve actuator 500 and press the valve actuator 500, thereby further fixing the valve actuator 500. In subsequent testing of the valve actuator 500, this can prevent the valve actuator 500 from being displaced, thus avoiding a decrease in the accuracy of the test.

[0051] Then, the first electric push rod 112 is activated, which drives the moving frame 111 to move closer to the valve actuator 500, thereby moving the two follower plates 114 into the valve actuator 500 and making the two follower plates 114 contact the butterfly plate 503 of the valve actuator 500.

[0052] Then, by starting the valve actuator 500 and controlling the butterfly plate 503 to rotate by a specified angle, such as controlling the butterfly plate 503 to rotate by 20°, when the butterfly plate 503 rotates, it will drive the two follower plates 114 to rotate synchronously with the butterfly plate 503. At this time, the angle sensor 115 will measure the angle of rotation of the shaft and the follower plate 114. If the angle data measured by both angle sensors 115 is 20°, it indicates that the valve actuator 500 is normal. If the angle data measured by the two angle sensors 115 are the same, but not 20°, and the difference from 20° is large, it indicates that the valve actuator 500 is abnormal. That is, the angle at which the valve actuator 500 controls the butterfly plate 503 to rotate has an error compared with the actual angle at which the butterfly plate 503 rotates, and the error is greater than the allowable error range, then the valve actuator 500 is abnormal.

[0053] When it is necessary to detect the working status of the valve actuator 500 at different temperatures, the heater 200 inside the detection box 100 can be activated to adjust the temperature inside the detection box 100.

[0054] Example 2: While all other parts are the same as in Example 1, the difference between this example and Example 1 is as follows: A linear displacement sensor (not shown) is also installed on the movable frame 113. The linear displacement sensor is used to detect the axial movement of the butterfly plate 503. A miniature pressure sensor (not shown) is set at the contact end of the follower plate 114. The radial offset of the butterfly plate 503 is determined by the difference in pressure distribution, so that the rotation angle, axial movement and radial offset of the butterfly plate 503 can be detected.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0056] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-dimensional position detection device for valve actuators with temperature and pressure compensation, comprising a detection mechanism, a limiting mechanism, and a stabilizing mechanism installed in a detection box, characterized in that, The limiting mechanism includes: A fixing plate is installed inside the testing box; Multiple sets of limiting components are slidably connected to the fixed plate and are used to cooperate with the flange of the valve actuator to lock the valve actuator in the horizontal direction. A driving component is used to synchronously drive multiple sets of the limiting components to move axially. The stabilizing mechanism is installed inside the detection box. The stabilizing mechanism is used to drive itself to move in the vertical direction by the power output from the drive component, thereby applying pre-tightening pressure to the top of the valve actuator.

2. The multi-dimensional position detection device for valve actuators with temperature and pressure compensation according to claim 1, characterized in that, The limiting component includes: The movable cylinder is slidably connected to the fixed plate, and its side wall has multiple through holes evenly distributed along the circumference. A threaded cylinder is fixedly connected to the movable cylinder; Multiple horizontal plates are located inside the movable cylinder. Movable plates and curved plates are installed on the horizontal plates, and the movable plates are located inside the through holes. Multiple second springs are used to connect the cross plate and the inner wall of the movable cylinder; A hollow cylinder is located between multiple horizontal plates, with a conical head at one end near the curved plate and a connecting rod installed at the other end of the conical head; A threaded rod passes through the threaded cylinder and is threadedly connected to the threaded cylinder, and is fixedly connected to the connecting rod; The gear is fixedly sleeved on the portion of the threaded rod located outside the movable cylinder.

3. The multi-dimensional position detection device for valve actuators with temperature and pressure compensation according to claim 2, characterized in that, The limiting component also includes: Multiple crossbars are fixedly connected to the end of the hollow cylinder away from the conical head; The push plate is located inside the movable cylinder and is fixedly connected to the multiple crossbars.

4. The multi-dimensional position detection device for valve actuators with temperature and pressure compensation according to claim 2, characterized in that, The limiting component also includes: A sealing plate is fixedly connected to the end of the movable cylinder away from the threaded cylinder; The fixing rod is fixedly connected to the sealing plate and inserted into the hollow cylinder.

5. The multi-dimensional position detection device for valve actuators with temperature and pressure compensation according to claim 3, characterized in that, The driving component includes: A rotating shaft passes through one side of the detection box and is rotatably connected to the detection box; The turntable is located outside the detection box and is fixedly connected to the rotating shaft; A toothed ring post, located inside the detection box, is fixedly connected to the rotating shaft and meshes with multiple gears, and its axial length is greater than the thickness of the gears; The first bevel gear is fixedly sleeved on the rotating shaft.

6. The multi-dimensional position detection device for valve actuators with temperature and pressure compensation according to claim 5, characterized in that, The stabilizing mechanism includes: The lead screw is rotatably mounted on the inner wall of the testing box via a mounting base; The second bevel gear is installed at the lower end of the lead screw and meshes with the first bevel gear. A lead screw nut is fitted onto the lead screw. The lifting plate is fixedly sleeved on the lead screw nut; A guide plate is installed on the inner top surface of the detection box, passes through the lifting plate, and is slidably connected to the lifting plate; The pressure plate is located directly below the lifting plate; Multiple third springs are used to connect the pressure plate and the lifting plate; Multiple guide columns are installed on the top surface of the pressure plate, and all penetrate the lifting plate and are slidably connected to the lifting plate.

7. The multi-dimensional position detection device for valve actuators with temperature and pressure compensation according to claim 1, characterized in that, The testing institutions include: The movable frame is slidably connected to the bottom surface of the detection box, and a cavity is provided inside it; The first electric push rod is installed on the inner wall of the detection box, and its extended end is fixedly connected to the movable frame; Both movable frames are slidably connected to the mobile frame; Two follower plates are rotatably connected to the movable frame via shafts, and angle sensors are mounted on the shafts.

8. The multi-dimensional position detection device for valve actuators with temperature and pressure compensation according to claim 7, characterized in that, The testing institution also includes: Two telescopic rods are installed inside the cavity of the movable frame, and the extension ends of the two telescopic rods are fixedly connected to the two movable frames respectively; Two first springs are respectively fitted onto two telescopic rods; The limiting plate is slidably connected to the movable frame; The second electric push rod is installed on the top surface of the movable frame, and its extension end is fixedly connected to the limiting plate.

9. The multi-dimensional position detection device for valve actuators with temperature and pressure compensation according to claim 8, characterized in that, Also includes: The display controller is installed on the front of the detection box; Both doors are hinged to the testing box.

10. The multi-dimensional position detection device for valve actuators with temperature and pressure compensation according to claim 9, characterized in that, Also includes: A heater, installed inside the testing chamber, is used to regulate the temperature inside the testing chamber.

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