Valve positioner adjustment device

Abstract

This utility model provides a valve positioner adjustment device. The adjustment device is located on the upper part of the valve positioner housing and includes a bracket. An adjustment box is mounted on the bracket, and a telescopic push rod is installed inside the adjustment box. A driving component is provided at the output rod end of the telescopic push rod, and a locking assembly is provided at the output shaft end of the driving component. An adjustment disc is located below the locking assembly and is rotatably mounted on the adjusting valve shaft of the positioner. The adjustment disc is provided with scale markings that can display the rotation angle of the adjusting valve shaft. This utility model can push the driving component and the locking assembly below the driving component onto the adjusting valve shaft by extending the output rod of the telescopic push rod. Then, the rotation of the output shaft of the driving component will rotate the adjustment disc and the adjusting valve shaft together, realizing convenient and quick adjustment of the valve opening angle, thereby achieving rapid adjustment of the valve positioner, making the operation more time-saving and labor-saving.

Description

Technical Field

[0001] This utility model relates to the field of regulating equipment technology, specifically to a valve positioner regulating device. Background Technology

[0002] Valve positioners, classified by structure into pneumatic valve positioners, electric valve positioners, and intelligent valve positioners, are key accessories for control valves and are typically used in conjunction with pneumatic control valves. Existing valve positioners suffer from insufficient stability during use, leading to reduced effectiveness and inconvenience in installation on valve pipelines, resulting in extended working time and reduced work efficiency. Patent documents have now addressed these issues.

[0003] For example, Chinese patent CN217463840U discloses a high-stability adjustment mechanism for a high-precision valve positioner, comprising a base. A placement groove is provided at the center of the top of the base. The inner walls of the front and rear sides of the placement groove are respectively fixedly connected to one end of a fixing spring. The other end of the fixing spring is respectively fixedly connected to the left and right ends of one side of a fixing clamp. The valve positioner body is located at the center of the bottom inner wall of the placement groove. Moving plates are slidably connected to the left and right sides of the bottom of the base. In this invention, rotating the rotating disk drives a bidirectional screw to rotate. The bidirectional screw drives the left and right moving plates, movable rod, fixed seat, fixing plate, and second rubber pad to approach the pipeline, thereby realizing the function of installing the base on the pipeline. The fixing clamp and the first rubber pad, under the action of the placement groove, approach the valve positioner body, achieving fixed clamping of the valve positioner body.

[0004] Existing valve positioner adjustment methods mostly rely on manual operation using a wrench to rotate the valve shaft. Without precise scale references, the opening degree depends entirely on experience, which greatly increases adjustment errors, resulting in insufficient flow control accuracy and affecting product quality. Furthermore, the valve shaft rotation resistance of large-diameter valves is high, and manual adjustment requires repeated force application, which is laborious and time-consuming. Especially when working at heights or in confined spaces, the safety and efficiency are extremely low. Therefore, a high-precision valve positioner adjustment device that can be accurately and quickly installed is designed to solve these defects. Utility Model Content

[0005] In view of this, the present invention provides a valve positioner adjustment device, which can achieve precise and convenient adjustment of the rotation angle of the regulating valve shaft through the telescopic push rod in conjunction with the driving component, the snap-fit ​​assembly and the scale markings on the adjustment plate, making it more efficient, labor-saving and easier to operate.

[0006] To solve the above-mentioned technical problems, this utility model provides a valve positioner adjustment device. The adjustment device is located on the upper part of the valve positioner housing and includes a bracket. An adjustment box is mounted on the bracket, and a telescopic push rod is installed inside the adjustment box. A driving component is provided at the output rod end of the telescopic push rod, and a locking assembly is provided at the output shaft end of the driving component. An adjustment disc is located below the locking assembly and is rotatably mounted on the adjusting valve shaft of the positioner. The adjustment disc is provided with scale markings that can display the rotation angle of the adjusting valve shaft. This utility model can push the driving component and the locking assembly below the driving component onto the adjusting valve shaft by extending the output rod of the telescopic push rod. Then, the rotation of the output shaft of the driving component will rotate the adjustment disc and the adjusting valve shaft together, realizing convenient and quick adjustment of the valve opening angle. Moreover, the valve opening degree can be monitored in real time through the scale markings on the adjustment disc, thereby realizing rapid adjustment of the valve positioner, making the operation more time-saving and labor-saving.

[0007] The locking assembly includes a locking pin at the end of the output shaft of the drive component, an elastic element on the locking pin, and a locking ball at the end of the elastic element. A sleeve adapted to the locking pin is located on the upper part of the regulating valve shaft, and a pin hole adapted to the locking ball is provided on the sleeve. This invention allows the operator to press the locking ball along the axis of the valve, causing it to smoothly enter the sleeve until it is successfully locked into the pin hole. Simultaneously, the extension of the telescopic push rod stops, and the drive component is activated to rotate, causing the regulating valve shaft and regulating disc to rotate to a suitable angle. This enables convenient and rapid adjustment of the valve opening, thereby achieving the valve positioning function and making operation more convenient.

[0008] The regulating disc is fitted onto the regulating valve shaft and rotates synchronously with the regulating valve shaft.

[0009] The driving component is a servo motor.

[0010] The side wall of the locking pin has an installation hole, and the elastic element is installed in the installation hole. The axis of the elastic element is perpendicular to the axis of the locking pin.

[0011] The elastic element is a spring.

[0012] The upper part of the regulating box is also equipped with a transparent observation window, through which the scale markings on the regulating dial can be clearly viewed, making it more convenient.

[0013] The telescopic push rod is either an electric push rod or a pneumatic push rod.

[0014] The bracket is bolted to the upper part of the valve positioner housing, which facilitates the disassembly of the bracket and adjustment of the device.

[0015] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects: 1. High adjustment precision: This utility model can solve the problems of traditional manual adjustment having no precise reference and large error by using the servo motor's ±0.5° rotation accuracy and the adjustment dial's 1° minimum scale. The opening adjustment error can be controlled within ±1°, improving the stability of flow control.

[0016] 2. Effortless and efficient operation: This utility model can automatically complete the locking and docking through an electric push rod, and the servo motor replaces manual force to drive the valve shaft, solving the problem of laborious and time-consuming adjustment of large-diameter valves. The adjustment time is greatly shortened and the operation intensity is reduced.

[0017] 3. Stable snap-fit ​​positioning: This utility model can use a spring to drive the snap-fit ​​ball to elastically engage with the snap-fit ​​pin hole, forming a circumferential anti-disengagement structure, solving the problem of easy slippage in traditional wrench adjustment, greatly improving the reliability of snap-fit, and avoiding damage to components during adjustment.

[0018] 4. Visualized Adjustment Status: This invention can solve the problem of having to get close to check the status during the adjustment process by using the acrylic observation window of the adjustment box in conjunction with the laser scale adjustment dial. Operators can remotely monitor the opening degree in real time without repeated confirmation, further improving efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the valve positioner adjustment device and the valve positioner of this utility model; Figure 2 This is a front view of the valve positioner adjustment device and the valve positioner of this utility model; Figure 3 This utility model Figure 2 Sectional view at point AA; Figure 4 This utility model Figure 3 Enlarged view of section B in the middle.

[0020] Explanation of reference numerals in the attached drawings: 100, housing; 200, bracket; 300, adjustment box; 310, transparent observation window; 320, telescopic push rod; 400, driving component; 500, snap-fit ​​assembly; 510, snap pin; 511, mounting hole; 520, elastic element; 530, retaining ball; 540, retaining sleeve; 541, pin hole; 600, adjustment disc; 610, scale marking. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the appendices of the embodiments of this utility model. Figure 1-4The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0022] like Figure 1-4 As shown: This embodiment provides a valve positioner adjustment device. The adjustment device is located on the upper part of the valve positioner housing 100. The adjustment device includes a bracket 200, which is bolted to the upper part of the valve positioner housing 100 for easy disassembly of the bracket 200 and the adjustment device. An adjustment box 300 is provided on the bracket 200, and a telescopic push rod 320 is provided inside the adjustment box 300. The telescopic push rod 320 is an electric push rod or a pneumatic push rod, and a driving element 400 is provided at the output rod end of the telescopic push rod 320. The output shaft end of the drive component 400 is equipped with a snap-fit ​​assembly 500, and below the snap-fit ​​assembly 500 is an adjusting plate 600. The adjusting plate 600 is rotatably mounted on the regulating valve shaft of the positioner. The adjusting plate 600 is equipped with a scale mark 610, which can display the rotation angle of the regulating valve shaft. The upper part of the adjusting box 300 is also equipped with a transparent observation window 310, which allows for a clear view of the scale mark 610 on the adjusting plate 600, making it more convenient. Specifically, the bracket 200 is made of 6061 aluminum alloy and adopts an L-shaped structure. The horizontal plate has a waist-shaped mounting hole 511, which is connected to the threaded hole on the upper part of the valve positioner housing 100 through an internal hex bolt (manufacturer: Zhejiang Ningbo Beilun Fastener Co., Ltd.). The aluminum alloy material has low density and high strength, the waist-shaped hole facilitates fine adjustment of the installation position, and the bolt connection enables quick disassembly and assembly, reducing maintenance difficulty. The regulating box 300 is made of 304 stainless steel and has a rectangular structure. Its top is welded and fixed to the bracket 200. A transparent observation window 310 is inlaid on its front, made of acrylic sheet (manufacturer: Shanghai Degussa Acrylic Co., Ltd.), and sealed with epoxy resin. 304 stainless steel is resistant to industrial corrosion, while the acrylic sheet combines high light transmittance and impact resistance, facilitating clear observation of the internal scale. The telescopic push rod 320 can be an electric push rod (model DT1000, manufacturer: Jiangsu Taizhou Huaneng Electric Push Rod Co., Ltd.), fixed to the top of the inner wall of the regulating box 300 with 45# steel angle bracket bolts. The output rod end of the telescopic push rod 320 is bolted to the housing 100 of the drive component 400 via a flange, with the output rod axis collinear with the regulating valve shaft axis. The electric push rod operates smoothly with controllable stroke, precisely driving the locking assembly 500 to dock with the valve shaft.

[0023] According to one embodiment of the present invention, such as Figure 1-4As shown, the snap-fit ​​assembly 500 includes a snap-fit ​​pin 510 disposed at the end of the output shaft of the drive member 400. An elastic element 520, which is a spring or a tin bronze spring, is disposed on the snap-fit ​​pin 510. A retaining ball 530 is disposed at the end of the elastic element 520. A retaining sleeve 540, which is adapted to the snap-fit ​​pin 510, is disposed on the upper part of the regulating valve shaft. A pin hole 541, which is adapted to the retaining ball 530, is disposed on the retaining sleeve 540. Specifically, the snap-fit ​​pin 510 is made of 45# steel, and two symmetrical mounting holes 511 are radially opened on its side wall. The spring is a 304 stainless steel compression spring (manufacturer: Guangdong Dongguan Dongsheng Spring Co., Ltd.), which is embedded in the mounting hole 511, and its axis is perpendicular to the axis of the snap-fit ​​pin 510. The retaining ball 530 is made of GCr15 bearing steel and is bonded and fixed to the outer end of the spring. The 45# steel locking pin 510 boasts high strength, the stainless steel spring is rust-resistant, and the bearing steel locking ball 530 exhibits excellent wear resistance, ensuring long-term stability of the locking structure. The ferrule 540, made of 40Cr alloy steel, is interference-fitted onto the upper part of the regulating valve shaft, rotating synchronously with it. The inner wall of the ferrule 540 has a groove that mates with the locking pin 510, and four evenly distributed pin holes 541 that mate with the locking ball 530 are located on the sidewall of the groove. The 40Cr alloy steel, after heat treatment, provides high strength, and the interference fit ensures no relative sliding between the ferrule 540 and the valve shaft. Multiple sets of pin holes 541 accommodate different adjustment starting positions. This utility model allows the operator to press the ball 530 along the axis to smoothly enter the sleeve 540 until it is successfully engaged in the pin hole 541. At the same time, the output rod of the telescopic push rod 320 is extended and the drive component 400 is started to rotate, which rotates the regulating valve shaft and the regulating disc 600 to a suitable angle. This enables convenient and quick adjustment of the valve opening, thereby achieving the valve positioning function and making the operation more convenient.

[0024] According to another embodiment of the present invention, such as Figure 1 and Figure 2As shown, the regulating disc 600 is mounted on the regulating valve shaft and rotates synchronously with it. Specifically, the regulating disc 600 is made of polycarbonate (PC), has a circular structure, and a keyway in the center that matches the regulating valve shaft. It connects to the valve shaft via a flat key to achieve synchronous rotation. The disc surface is printed with scale markings 610 along the circumference, with a minimum scale value of 1°. The scale lines are laser-engraved (manufacturer: Suzhou Laser Engraving Co., Ltd.), making them wear-resistant and clear. The PC material has strong impact resistance, and the laser-engraved scale prevents wear and blurring over long-term use. This utility model can push the drive component 400 and the snap-fit ​​component 500 below the drive component 400 onto the regulating valve shaft by extending the output rod of the telescopic push rod 320. Then, the rotation of the output shaft of the drive component 400 will cause the regulating plate 600 and the regulating valve shaft to rotate together, so as to realize the convenient and quick adjustment of the valve opening angle. Moreover, the valve opening degree can be monitored in real time by the scale mark 610 on the regulating plate 600, thereby realizing the quick adjustment of the valve positioner, making the operation more time-saving and labor-saving.

[0025] The drive unit 400 is a servo motor, model ES08MAII, manufactured by Shenzhen Yinyan Technology Co., Ltd. Its housing 100 is fixed to the output end of the telescopic push rod 320 with bolts. The output shaft end is connected to the locking pin 510 via a flat key and is equipped with an angle feedback module, which can transmit the rotation angle to an external controller (optional Siemens S7-200 SMART controller). The servo motor has high angular accuracy, enabling fine-tuning of valve opening. According to another embodiment of the present invention, as shown in Figures 3 and 4 Figure 4 The pin 510 shown has a mounting hole 511 on its side wall, and an elastic element 520 is disposed in the mounting hole 511. The axis of the elastic element 520 is perpendicular to the axis of the pin 510.

[0026] How to use this utility model: First, it needs to be clarified that the adjusting device involved in this utility model is mainly used to adjust the angle of the valve's adjusting spindle in order to control the valve's opening degree, thereby achieving the function of adjusting the opening degree of the valve positioner. This utility model takes the adjustment of the valve regulator as an example to explain its working principle or usage method in detail. The working principle is as follows: This invention achieves precise adjustment of valve opening by combining mechanical locking and positioning with electric drive. The core principle is as follows: Installation and positioning process: The bracket 200 is fixed to the valve positioner housing 100 by bolts, and the regulating box 300 is coaxially aligned with the regulating valve shaft to ensure that the snap-fit ​​component 500 and the ferrule 540 are precisely aligned; Snap-fit ​​docking process: Activate telescopic push rod 320 (electric push rod extends when energized), push the servo motor and snap-fit ​​assembly 500 to move downward along the axis. When snap ball 530 contacts sleeve 540, it is squeezed and compresses the spring. After snap pin 510 is fully inserted into the groove of sleeve 540, the spring returns to its original position and pushes snap ball 530 into pin hole 541, realizing circumferential positioning of snap-fit ​​assembly 500 and valve shaft. Precision adjustment process: The external controller (or the controller built into the servo motor) receives the adjustment command and drives the servo motor output shaft to rotate. Through the snap-fit ​​component 500, the snap-fit ​​sleeve 540, the regulating valve shaft and the regulating disc 600 rotate synchronously. The scale mark 610 of the regulating disc 600 rotates with the valve shaft. The operator reads the opening degree in real time through the transparent observation window 310. Adjustment completion stage: After reaching the target scale, the servo stops rotating, the telescopic push rod 320 retracts, causing the locking assembly 500 to disengage upward from the sleeve 540, and the locking ball 530 is squeezed and retracted by the edge of the sleeve 540. After the adjustment is completed, it resets and waits for the next operation. The usage method is as follows: Device installation: Attach the horizontal plate of bracket 200 to the upper part of valve positioner housing 100, and tighten it by passing M8 stainless steel bolts through the waist-shaped hole. Adjust the position of bracket 200 so that the axis of snap-fit ​​assembly 500 is aligned with the axis of regulating valve shaft.

[0027] Parameter preset: According to process requirements, the target opening value (e.g., 30°) is set through an external controller, the servo rotation direction and angle are preset, and the electric push rod stroke is set to 50mm (adjusted according to the 540 height of the ferrule).

[0028] Snap-in positioning: Activate the electric push rod extension mode. The output rod pushes the servo and snap-in assembly 500 downward until a "click" sound is heard (the locking ball 530 snaps into the pin hole 541). The push rod automatically stops extending, completing the snap-in. Opening adjustment: The controller issues an adjustment command, and the servo drives the valve shaft and adjustment plate 600 to rotate. The operator observes the scale change through the transparent observation window 310. When the pointer points to the target scale, the stop button is pressed and the servo brakes immediately. Reset and standby: After adjustment, start the electric push rod retraction mode, the locking component 500 moves upward and disengages from the locking sleeve 540, returning to the initial position and waiting for the next adjustment command; if manual emergency adjustment is required, the bracket 200 can be directly removed to take off the device. Maintenance: Regularly check the wear of the snap-fit ​​assembly 500 through the observation window. If the snap-fit ​​ball 530 or spring fails, unscrew the side plate bolts of the adjustment box 300, replace the damaged parts, and recalibrate the axis position after maintenance.

[0029] This utility model can achieve precise and convenient adjustment of the rotation angle of the regulating valve shaft by means of the telescopic push rod 320, the drive component 400, the snap-fit ​​component 500, and the scale markings 610 on the adjusting plate 600, which is more efficient, labor-saving, and easier to operate.

[0030] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A valve positioner adjusting device, wherein the adjusting device is disposed on the upper part of the valve positioner housing (100), characterized in that: The adjustment device includes a bracket (200), on which an adjustment box (300) is mounted. A telescopic push rod (320) is mounted inside the adjustment box (300). A drive member (400) is mounted at the output rod end of the telescopic push rod (320). A snap-fit ​​assembly (500) is mounted at the output shaft end of the drive member (400). An adjustment disc (600) is mounted below the snap-fit ​​assembly (500). The adjustment disc (600) is rotatably mounted on the regulating valve shaft of the positioner. A scale mark (610) is mounted on the adjustment disc (600), which can display the angle of rotation of the regulating valve shaft.

2. The valve positioner adjusting device as described in claim 1, characterized in that: The snap-fit ​​assembly (500) includes a snap pin (510) disposed at the end of the output shaft of the drive member (400), an elastic element (520) disposed on the snap pin (510), a ball (530) disposed at the end of the elastic element (520), and a sleeve (540) adapted to the snap pin (510) disposed on the upper part of the regulating valve shaft, and a pin hole (541) adapted to the ball (530) disposed on the sleeve (540).

3. The valve positioner adjusting device as described in claim 1, characterized in that: The regulating disc (600) is sleeved on the regulating valve shaft and rotates synchronously with the regulating valve shaft.

4. The valve positioner adjusting device as described in claim 1, characterized in that: The drive unit (400) is a servo motor.

5. The valve positioner adjusting device as described in claim 2, characterized in that: The side wall of the locking pin (510) is provided with a mounting hole (511), and the elastic element (520) is disposed in the mounting hole (511). The axis of the elastic element (520) is perpendicular to the axis of the locking pin (510).

6. The valve positioner adjusting device as described in claim 2, characterized in that: The elastic element (520) is a spring.

7. The valve positioner adjusting device as described in claim 1, characterized in that: The upper part of the regulating box (300) is also provided with a transparent observation window (310).

8. The valve positioner adjusting device as described in claim 1, characterized in that: The telescopic push rod (320) is an electric push rod or a pneumatic push rod.

9. The valve positioner adjusting device as described in claim 1, characterized in that: The bracket (200) is bolted to the upper part of the housing (100) of the valve positioner.

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