Extension mechanism of butterfly valve actuator

Abstract

The utility model discloses a butterfly valve actuator extension mechanism, which belongs to the field of butterfly valves, and comprises an adjusting structure fixedly arranged on a valve body, an actuator is fixedly arranged on the adjusting structure, the adjusting structure comprises a valve cylinder and a supporting outer cylinder fixedly arranged on the outer wall of the valve body, and the supporting outer cylinder is fixedly arranged on the valve body. A rotating cylinder is rotationally mounted on the supporting outer cylinder; by arranging the adjusting structure, the rotating cylinder rotates forwards or reversely on the supporting outer cylinder to drive the threaded cylinder to move upwards or downwards in the supporting outer cylinder, the threaded cylinder drives the valve rod to move upwards or downwards on the inner wall of the valve cylinder through the actuator, and the problem that an existing butterfly valve actuator extending mechanism cannot achieve the length adjusting function is avoided; the problem that the height of the actuator cannot be adjusted according to the actual burying depth of the butterfly valve under the ground is solved, the length adjusting function of the actuator extending mechanism is achieved, the use flexibility of the butterfly valve is improved, and the use effect of the butterfly valve is better.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, specifically a butterfly valve actuator extension mechanism. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. A butterfly valve is characterized by its closing element (valve disc or butterfly plate) being a disk that rotates around a valve shaft to open and close. Valves can be used to control the flow of various types of fluids, including air, water, steam, various corrosive media, slurry, oil, liquid metals, and radioactive media. In pipelines, they primarily function as shut-off and throttling devices. The butterfly valve's opening and closing element is a disc-shaped butterfly plate that rotates around its own axis within the valve body, thereby achieving opening, closing, or regulation.

[0003] The existing butterfly valve actuator extension mechanism does not have a length adjustment function, and cannot adjust the height of the actuator according to the actual burial depth of the butterfly valve underground, resulting in poor performance of the butterfly valve.

[0004] Therefore, this utility model provides a butterfly valve actuator extension mechanism to solve the above problems. Utility Model Content

[0005] This utility model provides a butterfly valve actuator extension mechanism, which aims to solve the problems mentioned in the background art, such as the inability to adjust the length of existing butterfly valve actuator extension mechanisms, the inability to adjust the height of the actuator according to the actual burial depth of the butterfly valve underground, and the resulting poor performance of the butterfly valve.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a butterfly valve actuator extension mechanism, comprising an adjustment structure fixedly installed on the valve body, wherein an actuator is fixedly installed on the adjustment structure;

[0007] The adjustment structure includes a valve cylinder and a supporting outer cylinder fixedly installed on the outer wall of the valve body. A rotating cylinder is rotatably mounted on the supporting outer cylinder, and a threaded cylinder is threadedly connected to the rotating cylinder. A first limiting block is symmetrically installed on the lower outer wall of the threaded cylinder. A valve stem is slidably mounted on the inner wall of the valve cylinder, and a second limiting block is supported on the upper outer wall of the valve cylinder. By setting up the adjustment structure, the rotating cylinder rotates forward or backward on the supporting outer cylinder, the driving threaded cylinder moves upward or downward in the supporting outer cylinder, and the threaded cylinder drives the valve stem to move upward or downward on the inner wall of the valve cylinder through the actuator. This avoids the problem that existing butterfly valve actuator extension mechanisms cannot perform length adjustment and cannot adjust the height of the actuator according to the actual burial depth of the butterfly valve underground, thus realizing the length adjustment function of the actuator extension mechanism.

[0008] Preferably, a lower flange is installed at the lower end of the supporting outer cylinder, and a first screw that is threadedly connected to the valve body is provided on the lower flange through a connecting hole. An upper flange is installed at the upper end of the threaded cylinder, and a second screw that is threadedly connected to the actuator is provided on the upper flange through a connecting hole. A third screw is provided on the valve cylinder through through holes on the left and right sides.

[0009] Preferably, the inner wall of the valve body is provided with a butterfly plate that is fixedly connected to the lower end of the valve cylinder, and the lower end of the rotating cylinder is equipped with a connector, which is adapted to the mounting groove.

[0010] Preferably, the upper end of the valve stem extends into the interior of the actuator and is fixedly connected to the drive component in the actuator, and a handwheel is installed on the actuator connecting rod.

[0011] Preferably, the inner wall of the supporting outer cylinder is provided with a first sliding groove that is slidably connected to the first limiting block, and the outer wall of the valve stem is provided with a second sliding groove that is slidably connected to the second limiting block.

[0012] Preferably, the second limiting block has a threaded hole that is threadedly connected to the third screw.

[0013] Beneficial effects: By setting an adjustment structure, using the supporting outer cylinder, rotating cylinder, threaded cylinder, first limit block, and valve stem in combination, the rotating cylinder rotates forward or backward on the supporting outer cylinder, driving the threaded cylinder to move up or down in the supporting outer cylinder. The threaded cylinder, through the actuator, drives the valve stem to move up or down on the inner wall of the valve cylinder. This avoids the problem that the existing butterfly valve actuator extension mechanism cannot perform length adjustment and cannot adjust the height of the actuator according to the actual burial depth of the butterfly valve underground. It realizes the length adjustment function of the actuator extension mechanism, improves the flexibility of butterfly valve use, and makes the butterfly valve perform better. Attached Figure Description

[0014] Figure 1 A three-dimensional structural schematic diagram of an extension mechanism for a butterfly valve actuator;

[0015] Figure 2 A three-dimensional cross-sectional schematic diagram of an extension mechanism for a butterfly valve actuator;

[0016] Figure 3 This is a schematic diagram of the adjustment structure of an extension mechanism for a butterfly valve actuator;

[0017] Figure 4 This is a partially disassembled and cross-sectional schematic diagram of the adjustment structure of an extension mechanism for a butterfly valve actuator;

[0018] Figure 5 This is a schematic diagram of the valve cylinder and valve stem of an extension mechanism for a butterfly valve actuator;

[0019] Figure 6 This is an enlarged structural diagram of point A of an extension mechanism for a butterfly valve actuator.

[0020] In the diagram: 1. Valve body; 11. Butterfly plate; 2. Adjustment structure; 21. Support outer cylinder; 211. Mounting groove; 212. First slide groove; 22. Rotating cylinder; 221. Connecting piece; 23. Threaded cylinder; 24. First limit block; 25. Valve cylinder; 251. Through hole; 26. Valve stem; 261. Second slide groove; 27. Second limit block; 271. Threaded hole; 3. Actuator; 31. Handwheel; 4. Lower flange; 41. First screw; 5. Upper flange; 51. Second screw; 6. Third screw. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] This embodiment provides a butterfly valve actuator extension mechanism, such as... Figure 1-6 As shown, the extension mechanism includes an adjustment structure 2 fixedly mounted on the valve body 1, and an actuator 3 fixedly mounted on the adjustment structure 2;

[0024] The regulating structure 2 includes a valve cylinder 25 and a supporting outer cylinder 21 fixedly installed on the outer wall of the valve body 1. A rotating cylinder 22 is rotatably installed on the supporting outer cylinder 21. A threaded cylinder 23 is threadedly connected to the rotating cylinder 22. A first limiting block 24 is symmetrically installed on the lower outer wall of the threaded cylinder 23. A valve stem 26 is slidably installed on the inner wall of the valve cylinder 25. A second limiting block 27 is supported on the upper outer wall of the valve cylinder 25.

[0025] In use, based on the actual operating scenario of the butterfly valve and the required burial depth of the valve body 1, the actuator 3 is ensured to be above ground, enabling the opening and closing of the butterfly plate 11 in the valve body 1. The user drives the rotating cylinder 22 to rotate in the forward or reverse direction. The rotating cylinder 22 synchronously rotates the connecting piece 221 in the mounting groove 211 on the supporting outer cylinder 21. The mounting groove 211 restricts the vertical position of the connecting piece 221. The rotating cylinder 22 drives the threaded cylinder 23 to move up or down in the supporting outer cylinder 21. The threaded cylinder 23 drives the actuator 3 to move, and the threaded cylinder 23 moves the valve stem 26. The valve stem 26 moves up or down on the inner wall of the valve cylinder 25, thereby realizing the length adjustment function of the actuator 3 extension mechanism. This avoids the problem that the existing butterfly valve actuator extension mechanism cannot perform length adjustment and cannot adjust the height of the actuator according to the actual burial depth of the butterfly valve underground. This improves the flexibility of the butterfly valve and makes the butterfly valve perform better.

[0026] In this embodiment, a butterfly plate 11 is provided on the inner wall of the valve body 1 and is fixedly connected to the lower end of the valve cylinder 25. A connector 221 is installed at the lower end of the rotating cylinder 22. The connector 221 is adapted to the mounting groove 211. The upper end of the valve stem 26 extends into the interior of the actuator 3 and is fixedly connected to the drive component in the actuator 3. A handwheel 31 is installed on the connecting rod of the actuator 3.

[0027] The connector 221 is adapted to the mounting groove 211, and the connection of the connector 221 in the mounting groove 211 is more stable, thereby realizing the function of the rotating cylinder 22 driving the threaded cylinder 23 to move up and down.

[0028] In this embodiment, the inner wall of the outer cylinder 21 is provided with a first groove 212 that is slidably connected to the first limiting block 24, and the outer wall of the valve stem 26 is provided with a second groove 261 that is slidably connected to the second limiting block 27.

[0029] The first limiting block 24 and the first sliding groove 212 work together to control the movement range of the first limiting block 24, preventing the threaded cylinder 23 from detaching from the supporting outer cylinder 21 during its upward movement. The second limiting block 27 and the second sliding groove 261 work together to drive the first limiting block 24 to rotate. With the cooperation of the first limiting block 24 and the second limiting block 27, the threaded cylinder 23 can rotate the valve cylinder 25, and the valve cylinder 25 drives the butterfly plate 11 to achieve the opening and closing functions.

[0030] Example 2

[0031] Unlike Embodiment 1, existing extension mechanisms are fixedly installed between the valve body and the actuator, which makes it inconvenient to disassemble the extension mechanism and hinders its maintenance. Therefore, a lower flange 4 is installed at the lower end of the outer cylinder 21. The lower flange 4 is provided with a first screw 41 threadedly connected to the valve body 1 through the connection hole. An upper flange 5 is installed at the upper end of the threaded cylinder 23. The upper flange 5 is provided with a second screw 51 threadedly connected to the actuator 3 through the connection hole. A third screw 6 is provided on the valve cylinder 25 through the through holes 251 on the left and right sides.

[0032] In use, the first screw 41 and the second screw 51 are removed in sequence to separate the lower flange 4 from the valve body 1 and the upper flange 5 from the actuator 3. The rotating cylinder 22 is driven to retract the threaded cylinder 23 into the supporting outer cylinder 21. Then, the third screw 6 is removed and the second limit block 27 is taken off. The valve stem 26 is moved out from the upper port of the valve cylinder 25 to realize the disassembly function of the extension mechanism, which facilitates the maintenance and repair of the extension mechanism and thus helps to improve its service life.

[0033] In this embodiment, the second limiting block 27 has a threaded hole 271 that is threadedly connected to the third screw 6.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A butterfly valve actuator extension mechanism comprising an adjustment structure (2) fixedly mounted on a valve body (1), characterized in that: The adjusting structure (2) is fixedly provided with an actuator (3); The adjusting structure (2) comprises a valve cylinder (25) and a supporting outer cylinder (21) fixedly arranged on the outer wall of the valve body (1), the supporting outer cylinder (21) is rotatably provided with a rotating cylinder (22), the rotating cylinder (22) is threadedly connected with a threaded cylinder (23), the lower outer wall of the threaded cylinder (23) is symmetrically provided with a first limiting block (24), the inner wall of the valve cylinder (25) is slidably provided with a valve rod (26), and the upper outer wall of the valve cylinder (25) is oppositely provided with a second limiting block (27).

2. The butterfly valve actuator extension mechanism of claim 1, wherein: The lower end of the supporting outer cylinder (21) is provided with a lower flange plate (4), the lower flange plate (4) is provided with a first screw (41) threadedly connected with the valve body (1) through a connecting hole, the upper end of the threaded cylinder (23) is provided with an upper flange plate (5), the upper flange plate (5) is provided with a second screw (51) threadedly connected with the actuator (3) through a connecting hole, and the valve cylinder (25) is provided with a third screw (6) through left and right through holes (251).

3. The butterfly valve actuator extension mechanism of claim 1, wherein: The inner wall of the valve body (1) is provided with a butterfly plate (11) fixedly connected with the lower end of the valve cylinder (25), the lower end of the rotating cylinder (22) is provided with a connecting piece (221), and the connecting piece (221) is matched with the mounting groove (211).

4. The butterfly valve actuator extension mechanism of claim 1, wherein: The upper end of the valve rod (26) extends into the actuator (3) and is fixedly connected with a driving member in the actuator (3), and the connecting rod of the actuator (3) is provided with a hand wheel (31).

5. The butterfly valve actuator extension mechanism of claim 1, wherein: The inner wall of the supporting outer cylinder (21) is provided with a first sliding groove (212) slidably connected with the first limiting block (24), and the outer wall of the valve rod (26) is provided with a second sliding groove (261) slidably connected with the second limiting block (27).

6. The butterfly valve actuator extension mechanism of claim 2, wherein: The second limiting block (27) is provided with a threaded hole (271) threadedly connected with the third screw (6).

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