Electro-pneumatic valve positioner with high sensitivity

Abstract

The utility model discloses an electro-pneumatic valve positioner with higher sensitivity, which comprises a mounting support, an electro-pneumatic valve positioner main body is fixedly mounted at the lower end of the mounting support, a sliding chute is formed in the upper end of the mounting support, a double-thread screw is rotatably connected in the sliding chute, and the double-thread screw is fixedly connected with the mounting support. Two fixing assemblies used for clamping and fixing are symmetrically arranged at the left end and the right end of the double-thread screw. A storage hole is formed in the side wall of the mounting support, a sliding cavity is formed between the storage hole and the sliding groove, and a driving assembly used for driving the double-thread screw to rotate is arranged in the sliding cavity. According to the electro-pneumatic valve positioner, the square hole between the transmission rod and the double-thread screw is matched with the square rod, the knob can be located in the containing hole, operation of a user is facilitated, accidental injury possibly caused by protruding of the knob is avoided, and the situation that the knob is touched, and the fixing effect of the electro-pneumatic valve positioner is affected is avoided.

Description

Technical Field

[0001] This utility model relates to the field of electric valve positioner technology, and in particular to an electric valve positioner with high sensitivity. Background Technology

[0002] Pneumatic valve positioners are crucial devices in industrial automation process control. As a primary accessory to control valves, they are typically used in conjunction with pneumatic control valves. In industrial automation systems, the electric valve positioner receives output signals from the controller and converts these signals into pneumatic signals to drive the pneumatic control valve. Once the control valve actuates, the valve stem displacement is fed back to the electric valve positioner via a mechanical device, and the valve position status is transmitted to the upper-level system via an electrical signal, thus achieving precise control of the control valve.

[0003] According to the patent publication number "CN218348379U" for an air pressure reducing electric valve positioner, the rotation of the screw shaft by the turntable causes two clamping plates to press against the outer sides of the valve body, thereby fixing the positioner to the outside of the valve body. However, the turntable is not designed with any limiting protection, and the clamping plates are easily loosened due to contact, which affects the fixation of the electric valve positioner. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a highly sensitive electric valve positioner. Through the design of the square hole and square rod between the transmission rod and the double-ended screw, the knob can be located in the storage hole. This not only facilitates user operation but also avoids accidental injury that may be caused by the knob protruding, and also prevents the knob from being touched, thus affecting the fixing effect of the electric valve positioner.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A highly sensitive electric valve positioner includes a mounting bracket, on the lower end of which the electric valve positioner body is fixedly mounted. The upper end of the mounting bracket has a sliding groove, and a double-ended screw is rotatably connected inside the sliding groove. Two fixing components for clamping and fixing are symmetrically arranged at the left and right ends of the double-ended screw.

[0007] The side wall of the mounting bracket is provided with a storage hole, and a sliding cavity is formed between the storage hole and the sliding groove. A drive assembly for driving the double-ended screw to rotate is provided in the sliding cavity.

[0008] Preferably, the fixing component includes a slider threaded onto a double-ended screw, a sliding bracket slidably connected to the upper end of the mounting bracket, the sliding bracket being fixedly connected to the slider, a horizontal plate being fixedly installed on the upper inner side of the sliding bracket, and a clamping plate being fixedly installed on the side wall of the horizontal plate.

[0009] Preferably, an anti-slip pad is fixedly installed on the inner side of the clamping plate.

[0010] Preferably, the two ends of the double-headed screw have opposite thread directions.

[0011] Preferably, the driving component includes a transmission rod slidably connected in the sliding cavity. One end of the transmission rod extends into the receiving hole and is fixedly installed with a knob. A retaining ring is fixedly installed on the outer side of the transmission rod, and the retaining ring is elastically connected to the sliding cavity through a spring;

[0012] The other end of the transmission rod is fixedly installed with a square rod, and a square hole adapted to the square rod is opened at one end of the double-headed screw.

[0013] Preferably, the cross-section of the sliding cavity is a middle-shaped structure, and the retaining ring is located at the middle position of the sliding cavity.

[0014] The utility model has the following beneficial effects:

[0015] 1. By rotating the knob, the user can easily drive the double-headed screw to rotate, thereby realizing the clamping or release of the sliding bracket and the clamping plate thereon to the main body of the electric valve positioner. This design greatly simplifies the adjustment process and improves work efficiency;

[0016] 2. The anti-slip pad provided on the clamping plate increases the friction with the main body of the electric valve positioner, effectively preventing sliding or loosening caused by vibration or external force, and ensuring the accuracy and stability of positioning;

[0017] 3. Since the two ends of the double-headed screw have opposite thread directions, when the knob rotates, the sliders at both ends will move in opposite directions simultaneously. This design enables the positioner to adapt to electric valve positioner bodies of different sizes and shapes, improving its versatility and flexibility;

[0018] 4. The matching design of the square hole and the square rod between the transmission rod and the double-headed screw ensures the accuracy and efficiency of transmission. At the same time, the elastic connection of the spring provides a reset function for the transmission rod, making the operation smoother. The knob is located in the receiving hole, which not only facilitates the user's operation but also avoids accidental injuries that may be caused by the protrusion of the knob. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a highly sensitive electric valve positioner proposed by the utility model;

[0020] Figure 2 is a sectional view of a highly sensitive electric valve positioner proposed by the utility model;

[0021] Figure 3This is a schematic diagram of the transmission rod of a highly sensitive electric valve positioner proposed in this utility model.

[0022] In the diagram: 1. Mounting support; 2. Electric valve positioner body; 3. Storage hole; 4. Knob; 5. Slide groove; 6. Double-ended screw; 7. Slider; 8. Sliding bracket; 9. Horizontal plate; 10. Clamping plate; 11. Anti-slip pad; 12. Slide cavity; 13. Square hole; 14. Square rod; 15. Spring; 16. Transmission rod; 17. Retaining ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Reference Figures 1-3 A highly sensitive electric valve positioner includes a mounting bracket 1. The lower end of the mounting bracket 1 is fixedly mounted with the electric valve positioner body 2. The upper end of the mounting bracket 1 is provided with a sliding groove 5. A double-ended screw 6 is rotatably connected inside the sliding groove 5. The two ends of the double-ended screw 6 have opposite thread directions. Two fixing components for clamping and fixing are symmetrically arranged at the left and right ends of the double-ended screw 6. The fixing components include a slider 7 threadedly connected to the double-ended screw 6. A sliding bracket 8 is slidably connected to the upper end of the mounting bracket 1. The sliding bracket 8 is fixedly connected to the slider 7. A horizontal plate 9 is fixedly mounted on the upper inner side of the sliding bracket 8. A clamping plate 10 is fixedly mounted on the side wall of the horizontal plate 9. An anti-slip pad 11 is fixedly mounted on the inner side of the clamping plate 10.

[0026] The side wall of the mounting bracket 1 is provided with a storage hole 3. A sliding cavity 12 is opened between the storage hole 3 and the sliding groove 5. The cross-section of the sliding cavity 12 is a Chinese character shape. The retaining ring 17 is located in the middle of the sliding cavity 12. A drive assembly for driving the double-ended screw 6 to rotate is provided in the sliding cavity 12. The drive assembly includes a transmission rod 16 slidably connected in the sliding cavity 12. One end of the transmission rod 16 extends into the storage hole 3 and is fixedly installed with a knob 4. A retaining ring 17 is fixedly installed on the outside of the transmission rod 16. The retaining ring 17 and the sliding cavity 12 are elastically connected by a spring 15, so that the transmission rod 16 can be kept in the storage hole 3 when it is not subjected to external force, so as to prevent the double-ended screw 6 from being touched and affecting the clamping of the clamping plate 10.

[0027] A square rod 14 is fixedly installed at the other end of the transmission rod 16. A square hole 13 adapted to the square rod 14 is opened at one end of the double-ended screw 6. During the movement of the transmission rod 16, due to the design of the square rod 14 and the square hole 13, the transmission rod 16 will not affect the double-ended screw 6.

[0028] Working principle:

[0029] When the user needs to adjust the position of the electric valve positioner body 2 or fix it, the two clamping plates 10 are placed on the outer sides of the valve body, and then the knob 4 is rotated. Rotation of the knob 4 causes the transmission rod 16 to slide and rotate within the slide cavity 12, which in turn drives the double-ended screw 6 to rotate via the square rod 14. The rotation of the double-ended screw 6 causes the sliders 7 at both ends to move in opposite directions, thereby clamping or releasing the electric valve positioner body 2 through the sliding bracket 8, the horizontal plate 9, and the clamping plates 10. The anti-slip pad 11 increases the friction between the clamping plates 10 and the electric valve positioner body 2, preventing slippage or loosening. When it is necessary to release the electric valve positioner body 2, simply rotate the knob 4 in the opposite direction. At this time, the spring 15 helps the transmission rod 16 and the knob 4 return to their initial positions.

[0030] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A highly sensitive electric valve positioner, characterized in that: It includes a mounting support (1), at the lower end of the mounting support (1), an electric valve positioner body (2) is fixedly installed, at the upper end of the mounting support (1), a chute (5) is provided, inside the chute (5), a double-headed screw rod (6) is rotationally connected, and at the left and right ends of the double-headed screw rod (6), two fixing components for clamping and fixing are symmetrically arranged; On the side wall of the mounting support (1), a storage hole (3) is provided, between the storage hole (3) and the chute (5), a sliding cavity (12) is provided, and inside the sliding cavity (12), a driving component for driving the double-headed screw rod (6) to rotate is provided.

2. The highly sensitive electric valve positioner according to claim 1, characterized in that, The fixing component includes a slider (7) threadedly connected to the double-headed screw rod (6), on the upper end of the mounting support (1), a sliding bracket (8) is slidably connected, the sliding bracket (8) is fixedly connected to the slider (7), at the upper end of the inner side of the sliding bracket (8), a cross plate (9) is fixedly installed, and on the side wall of the cross plate (9), a clamping plate (10) is fixedly installed.

3. The highly sensitive electric valve positioner according to claim 2, characterized in that, On the inner side of the clamping plate (10), an anti-slip pad (11) is fixedly installed.

4. The highly sensitive electric valve positioner according to claim 1, characterized in that, The thread rotation directions at both ends of the double-headed screw rod (6) are opposite.

5. The highly sensitive electric valve positioner according to claim 1, characterized in that, The driving component includes a transmission rod (16) slidably connected inside the sliding cavity (12), one end of the transmission rod (16) extends into the storage hole (3) and a knob (4) is fixedly installed, on the outer side of the transmission rod (16), a retaining ring (17) is fixedly installed, and between the retaining ring (17) and the sliding cavity (12), they are elastically connected by a spring (15); The other end of the transmission rod (16) is fixedly installed with a square rod (14), and on one end of the double-headed screw rod (6), a square hole (13) adapted to the square rod (14) is provided.

6. A highly sensitive electric valve positioner according to claim 5, characterized in that, The cross section of the sliding cavity (12) is of a middle character structure, and the retaining ring (17) is located at the middle position of the sliding cavity (12).

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