Hydraulic control device of butterfly valve

Abstract

The utility model discloses a hydraulic control device of a butterfly valve, which belongs to the field of valves and comprises a valve body, the top of the valve body is fixedly connected with a housing, a valve rod is rotatably mounted in the housing, the bottom of the valve rod is fixedly connected with a valve plate, one side of the housing is fixedly connected with a cylinder body, a movable frame is arranged in the cylinder body, and the movable frame is fixedly connected with the valve plate. Pistons are fixedly connected to the two ends of the movable frame and slidably connected with the inner wall of the cylinder body, a tooth groove is formed in the inner bottom wall of the movable frame, a gear is meshed with the top of the tooth groove, a rotating shaft is fixedly connected to one side of the gear, and one end of the rotating shaft extends into the housing and is fixedly connected with a worm. One side of the worm is meshed with a worm gear, and the worm gear is fixedly installed on the valve rod. Through the arrangement of the cylinder body, the movable frame, the piston, the tooth groove, the gear, the rotating shaft, the worm and the worm gear, the output power requirement of the hydraulic oil cylinder can be lowered, and the stability of the valve plate can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and in particular relates to a hydraulic control device of a butterfly valve. Background Art

[0002] Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Butterfly valve, also known as flap valve, is a simple regulating valve that can be used for the on-off control of low-pressure pipeline media. Butterfly valve refers to a valve whose closing part (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing. It mainly plays a role of cutting off and throttling on the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating.

[0003] Existing hydraulic butterfly valves generally use hydraulic cylinders to directly drive the valve stem to rotate, so that the valve stem drives the valve plate to rotate to open and close the valve. This requires a high output power of the hydraulic cylinder and the stability of the valve plate is low. Utility Model Content

[0004] The purpose of the utility model is to provide a hydraulic control device for a butterfly valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic control device for a butterfly valve, comprising a valve body, a cover shell fixedly connected to the top of the valve body, a valve stem rotatably installed inside the cover shell, a valve plate fixedly connected to the bottom of the valve stem, a cylinder body fixedly connected to one side of the cover shell, a movable frame provided inside the cylinder body, pistons fixedly connected to both ends of the movable frame, the pistons are slidably connected to the inner wall of the cylinder body, a tooth groove is provided on the inner bottom wall of the movable frame, a gear is meshed at the top of the tooth groove, a rotating shaft is fixedly connected to one side of the gear, one end of the rotating shaft extends into the cover shell and is fixedly connected to a worm, a worm wheel is meshed on one side of the worm, and the worm wheel is fixedly installed on the valve stem.

[0006] As a preferred implementation, flanges are provided on both sides of the valve body.

[0007] As a preferred implementation, a sealing ring is fixedly connected to the edge of the valve plate.

[0008] As a preferred embodiment, both ends of the top of the cylinder body are provided with oil inlet and outlet ports.

[0009] As a preferred implementation, a bearing is fixedly mounted in the middle of one side of the cylinder body, and the rotating shaft is rotatably mounted in the bearing.

[0010] As a preferred embodiment, end covers are fixedly mounted on both ends of the cylinder body by bolts.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The hydraulic control device of the butterfly valve is provided with a cylinder body, a movable frame, a piston, a tooth groove, a gear, a rotating shaft, a worm and a worm wheel. When the valve is opened or closed, oil can be injected into the cylinder body through one of the oil inlets and outlets, and the oil in the cylinder body can be discharged through the other oil inlet and outlet, so that the piston drives the movable frame to move in the cylinder body, the movable frame drives the gear to rotate through the tooth groove, the gear drives the rotating shaft to rotate, the rotating shaft drives the worm to rotate, the worm drives the worm wheel to rotate, the worm wheel drives the valve stem to rotate, and the valve stem drives the valve plate to rotate, so as to realize the opening and closing of the valve, and reduce the output power requirement of the hydraulic oil cylinder;

[0013] The hydraulic control device of the butterfly valve can improve the stability of the valve plate by utilizing the irreversibility of the worm and worm wheel transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the cylinder body of the utility model;

[0017] Figure 4 It is a schematic diagram of the internal structure of the cylinder body of the utility model.

[0018] In the figure: 1. valve body; 2. cover; 3. valve stem; 4. valve plate; 5. cylinder body; 6. movable frame; 7. piston; 8. tooth groove; 9. gear; 10. rotating shaft; 11. worm; 12. worm wheel; 13. flange; 14. sealing ring; 15. oil inlet and outlet; 16. bearing; 17. end cover. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the embodiments.

[0020] The following examples are used to illustrate the present invention, but cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0021] See also Figure 1-4The utility model provides a hydraulic control device for a butterfly valve, including a valve body 1. Both sides of the valve body 1 are provided with flanges 13. The butterfly valve can be installed with a fluid pipeline through the flanges 13. The top of the valve body 1 is fixedly connected with a cover shell 2. A valve stem 3 is rotatably installed inside the cover shell 2. The bottom of the valve stem 3 is fixedly connected with a valve plate 4. A sealing ring 14 is fixedly connected to the edge of the valve plate 4. The sealing performance of the valve plate 4 can be improved by setting the sealing ring 14.

[0022] A cylinder body 5 is fixedly connected to one side of the housing 2, and both ends of the top of the cylinder body 5 are provided with oil inlet and outlet ports 15. A movable frame 6 is provided inside the cylinder body 5, and both ends of the movable frame 6 are fixedly connected to pistons 7. The piston 7 is slidably connected to the inner wall of the cylinder body 5. A tooth groove 8 is provided on the inner bottom wall of the movable frame 6, and a gear 9 is meshed with the top of the tooth groove 8. A rotating shaft 10 is fixedly connected to one side of the gear 9. One end of the rotating shaft 10 extends into the housing 2 and is fixedly connected to a worm 11. A worm wheel 12 is meshed with one side of the worm 11. The worm wheel 12 is fixedly mounted on the valve stem 3. Through the cylinder body 5, the movable frame 6, the piston 7, the tooth groove 8, the gear 9, the rotating shaft 10, the worm 11 and the worm wheel 12 It is arranged that when the valve is opened or closed, oil can be injected into the cylinder body 5 through one of the oil inlet and outlet ports 15, and the oil in the cylinder body 5 can be discharged through the other oil inlet and outlet port 15, so that the piston 7 drives the movable frame 6 to move in the cylinder body 5, and the movable frame 6 drives the gear 9 to rotate through the tooth groove 8, so that the gear 9 drives the rotating shaft 10 to rotate, and the rotating shaft 10 drives the worm 11 to rotate, and the worm 11 drives the worm wheel 12 to rotate, and the worm wheel 12 drives the valve stem 3 to rotate, and the valve stem 3 drives the valve plate 4 to rotate, so as to realize the opening and closing of the valve, reduce the output power requirement of the hydraulic cylinder, and utilize the irreversibility of the transmission of the worm 11 and the worm wheel 12 to improve the stability of the valve plate 4.

[0023] A bearing 16 is fixedly installed in the middle of one side of the cylinder body 5, and the rotating shaft 10 is rotatably installed in the bearing 16. The arrangement of the bearing 16 can improve the stability of the rotating shaft 10 during rotation.

[0024] Wherein, both ends of the cylinder body 5 are fixedly mounted with end covers 17 by bolts. Through the arrangement of the end covers 17 , the two ends of the cylinder body 5 can be disassembled, so that the interior of the cylinder body 5 can be easily maintained.

[0025] The working principle and use process of the utility model are as follows: firstly, through the arrangement of the cylinder body 5, the movable frame 6, the piston 7, the tooth groove 8, the gear 9, the rotating shaft 10, the worm 11 and the worm wheel 12, when the valve is opened and closed, oil can be injected into the cylinder body 5 through one of the oil inlet and outlet ports 15, and the oil in the cylinder body 5 can be discharged through the other oil inlet and outlet ports 15, so that the piston 7 drives the movable frame 6 to move in the cylinder body 5, and the movable frame 6 drives the gear 9 to rotate through the tooth groove 8, so that the gear 9 drives the rotating shaft 10 to rotate, so that the rotating shaft 10 drives the worm 11 to rotate, so that the worm 11 drives the worm wheel 12 to rotate, so that the worm wheel 12 drives the valve stem 3 to rotate, so that the valve stem 3 drives the valve plate 4 to rotate, so as to realize the opening and closing of the valve, reduce the output power requirement of the hydraulic cylinder, and utilize the irreversibility of the transmission of the worm 11 and the worm wheel 12 to improve the stability of the valve plate 4.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic control device for a butterfly valve, comprising a valve body (1), characterized in that: The top of the valve body (1) is fixedly connected to a cover shell (2), a valve stem (3) is rotatably mounted inside the cover shell (2), a valve plate (4) is fixedly connected to the bottom of the valve stem (3), a cylinder body (5) is fixedly connected to one side of the cover shell (2), a movable frame (6) is provided inside the cylinder body (5), pistons (7) are fixedly connected to both ends of the movable frame (6), the piston (7) is slidably connected to the inner wall of the cylinder body (5), a tooth groove (8) is provided on the inner bottom wall of the movable frame (6), a gear (9) is meshed at the top of the tooth groove (8), a rotating shaft (10) is fixedly connected to one side of the gear (9), one end of the rotating shaft (10) extends into the cover shell (2) and is fixedly connected to a worm (11), a worm wheel (12) is meshed on one side of the worm (11), and the worm wheel (12) is fixedly mounted on the valve stem (3).

2. A butterfly valve hydraulic control device according to claim 1, characterized in that: Flanges (13) are provided on both sides of the valve body (1).

3. A butterfly valve hydraulic control device according to claim 1, characterized in that: A sealing ring (14) is fixedly connected to the edge of the valve plate (4).

4. A butterfly valve hydraulic control device according to claim 1, characterized in that: Both ends of the top of the cylinder body (5) are provided with oil inlet and outlet ports (15).

5. The hydraulic control device of a butterfly valve according to claim 1, characterized in that: A bearing (16) is fixedly mounted in the middle of one side of the cylinder body (5), and the rotating shaft (10) is rotatably mounted in the bearing (16).

6. The hydraulic control device of a butterfly valve according to claim 1, characterized in that: End covers (17) are fixedly mounted on both ends of the cylinder body (5) by means of bolts.

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