Eccentric butterfly valve

Abstract

The utility model belongs to the technical field of butterfly valves, and particularly relates to an eccentric butterfly valve which comprises a valve body. A valve cavity is formed in the valve body; the inner wall of the valve cavity is rotationally connected with a butterfly valve plate. A supporting shaft is clamped on the surface of the butterfly valve plate; an adjusting rotating shaft is clamped on the surface of the butterfly valve plate; the top end and the bottom end of the adjusting rotating shaft are fixedly connected with transmission clamping blocks. Transmission clamping grooves are formed in the surface of the butterfly valve plate and the inner wall of the valve cavity. The surface of the adjusting rotating shaft is rotationally connected with an adjusting nut. By arranging the transmission clamping block and the transmission clamping groove to be matched, the adjusting rotating shaft can drive the butterfly valve plate to rotate, meanwhile, the adjusting rotating shaft is clamped into the valve body through the adjusting nut, during disassembly, only the adjusting nut needs to be rotated to pull the adjusting rotating shaft out of the surface of the butterfly valve plate, the supporting shaft is connected with the butterfly valve plate in a clamped mode, and therefore the butterfly valve plate is taken out. The device is convenient to overhaul and replace, and the use adaptability is improved.

Description

Technical Field

[0001] This utility model belongs to the field of butterfly valve technology, specifically an eccentric butterfly valve. Background Technology

[0002] A butterfly valve is a common industrial valve, characterized by its simple structure and easy operation. It gets its name from its shape, which resembles a half-open butterfly wing. The main purpose of a butterfly valve is to control the flow of liquids or gases in pipelines. Its main components include the valve body, valve shaft, valve disc, and sealing ring. The valve disc is typically a disc or butterfly-shaped structure, and its rotation controls the flow of fluid. Butterfly valves can be operated manually or automatically, depending on the application requirements.

[0003] Chinese patent CN212718047U discloses a special double-eccentric soft-seal butterfly valve, including a pressure ring and a cylindrical pin. The pressure ring is connected to the valve body by a screw. A valve seat is installed on the right side of the screw, and a gasket is placed above the valve seat. A limit bolt is located on the upper right side of the valve seat, and a butterfly plate is located on the right side of the limit bolt. The cylindrical pin is located inside the butterfly plate, and a valve stem is located below the cylindrical pin. A rubber gasket is installed below the butterfly plate, and a guide plate is located below the rubber gasket. Compared with existing ordinary butterfly valves, this special double-eccentric soft-seal butterfly valve significantly improves the overall performance of the butterfly valve while increasing its structure. The improved butterfly valve avoids internal blockage, has a lower opening torque, more reliable sealing, enhances the stability of the device, guides the water source, and reduces the impact force of water flow on the butterfly plate, effectively meeting people's needs.

[0004] As mentioned above, the patent provides a special double-eccentric soft-seal butterfly valve, which can improve the overall performance of the butterfly valve and avoid blockage. However, during use, the internal butterfly plate will inevitably experience surface corrosion, which will lead to some contamination of the liquid passing through. Furthermore, the double-eccentric soft-seal butterfly valve is difficult to disassemble, replace, or repair due to the fixed limit bolts, resulting in low adaptability.

[0005] Therefore, an eccentric butterfly valve is proposed to address the above problems. Utility Model Content

[0006] To overcome the shortcomings of existing technologies and solve the above problems, an eccentric butterfly valve is proposed.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: An eccentric butterfly valve of this utility model includes a valve body; a valve cavity is opened inside the valve body; a butterfly valve plate is rotatably connected to the inner wall of the valve cavity; a support shaft is snapped onto the surface of the butterfly valve plate; an adjusting shaft is snapped onto the surface of the butterfly valve plate; transmission blocks are fixedly connected to the top and bottom ends of the adjusting shaft; transmission grooves are opened on the surface of the butterfly valve plate and the inner wall of the valve cavity; an adjusting nut is rotatably connected to the surface of the adjusting shaft; the surface of the adjusting nut is threadedly connected to the surface of the valve body.

[0008] Preferably, a support frame is fixedly connected to the top of the valve body; an adjusting screw is rotatably connected to the surface of the support frame; a lifting plate is threadedly connected to the surface of the adjusting screw; and a limit rod is slidably connected to the surface of the lifting plate.

[0009] Preferably, the bottom end of the limiting rod is fixedly connected to the surface of the valve body; the top end of the adjusting screw is fixedly connected to an adjusting spline; and a protective cover is snapped onto the surface of the support frame.

[0010] Preferably, the surface of the lifting plate is rotatably connected to a transmission cylinder adapted to the transmission block; a rotating handle is fixedly connected to the top of the transmission cylinder; the number of the support frame, adjusting screw, and limiting rod is set to two, and the two support frames, adjusting screws, and limiting rods are symmetrically arranged on both sides of the transmission cylinder.

[0011] Preferably, the inner wall of the valve cavity is provided with a placement groove; a sealing ring is engaged inside the placement groove; the inner wall of the valve cavity is provided with a support groove adapted to the support shaft; and connecting grooves are provided on both sides of the valve body.

[0012] Preferably, a base is snapped onto the surface of the valve body; a fixing bolt is slidably connected to the surface of the valve body; one end of the fixing bolt passes through the valve body and the base in sequence and extends to one side of the base; a fixing nut is threaded onto the end of the fixing bolt located on the side of the base.

[0013] The beneficial effects of this utility model are:

[0014] This utility model provides an eccentric butterfly valve. By setting a transmission block and a transmission slot, the adjusting shaft can drive the butterfly valve plate to rotate. At the same time, the adjusting nut locks the adjusting shaft into the valve body. When disassembling, simply turn the adjusting nut to pull the adjusting shaft out from the surface of the butterfly valve plate. The support shaft is also locked with the butterfly valve plate, so the butterfly valve plate can be removed, which facilitates its maintenance and replacement and improves its adaptability. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0016] Figure 1 This is a perspective view of the present invention;

[0017] Figure 2 This is a side view of the present invention;

[0018] Figure 3 This is a perspective view of the top part of the valve body structure in this utility model;

[0019] Figure 4 This is a perspective view of the cross-sectional structure of the valve body in this utility model;

[0020] Figure 5 This is an exploded view of a portion of the structure of this utility model;

[0021] Legend:

[0022] 1. Valve body; 2. Valve cavity; 3. Butterfly valve plate; 4. Support shaft; 5. Adjusting shaft; 6. Transmission block; 7. Transmission slot; 8. Adjusting nut; 9. Support frame; 10. Adjusting screw; 11. Lifting plate; 12. Limiting rod; 13. Protective cover; 14. Transmission sleeve; 15. Placement slot; 16. Sealing ring; 17. Support groove; 18. Connecting groove; 19. Placement base; 20. Fixing bolt; 21. Fixing nut. 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. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Specific implementation examples are given below.

[0025] Please see Figure 1 - Figure 5This utility model provides an eccentric butterfly valve, including a valve body 1; a valve cavity 2 is formed inside the valve body 1; a butterfly valve plate 3 is rotatably connected to the inner wall of the valve cavity 2; a support shaft 4 is snapped onto the surface of the butterfly valve plate 3; an adjusting shaft 5 is snapped onto the surface of the butterfly valve plate 3; transmission blocks 6 are fixedly connected to the top and bottom ends of the adjusting shaft 5; transmission grooves 7 are formed on the surface of the butterfly valve plate 3 and the inner wall of the valve cavity 2; an adjusting nut 8 is rotatably connected to the surface of the adjusting shaft 5; the surface of the adjusting nut 8 is threadedly connected to the surface of the valve body 1; during operation, the valve cavity 2 is located on the valve body 1... Inside, the butterfly valve plate 3 rotates within the valve cavity 2. The support shaft 4 supports and limits the butterfly valve plate 3, slightly engaging with its surface, allowing it to be removed from the valve cavity 2. Additionally, a transmission block 6 and a transmission groove 7 work together to allow the adjusting shaft 5 to rotate the butterfly valve plate 3. Simultaneously, the adjusting nut 8 engages the adjusting shaft 5 within the valve body 1. During disassembly, simply rotating the adjusting nut 8 pulls the adjusting shaft 5 out of the butterfly valve plate 3, and the support shaft 4 engages with the butterfly valve plate 3, allowing the butterfly valve plate 3 to be removed. This facilitates maintenance and replacement, improving its adaptability.

[0026] Furthermore, such as Figure 2 , Figure 3 and Figure 5As shown, a support frame 9 is fixedly connected to the top of the valve body 1; an adjusting screw 10 is rotatably connected to the surface of the support frame 9; a lifting plate 11 is threadedly connected to the surface of the adjusting screw 10; a limit rod 12 is slidably connected to the surface of the lifting plate 11; the bottom end of the limit rod 12 is fixedly connected to the surface of the valve body 1; an adjusting spline is fixedly connected to the top end of the adjusting screw 10; a protective cover 13 is snapped onto the surface of the support frame 9; a transmission cylinder 14 adapted to the transmission block 6 is rotatably connected to the surface of the lifting plate 11; a rotating handle is fixedly connected to the top end of the transmission cylinder 14; the number of the support frame 9, the adjusting screw 10, and the limit rod 12 are all set to two, and the two support frames 9, the adjusting screw 10, and the limit rod 12 are symmetrically arranged on both sides of the transmission cylinder 14. During operation, the support frame 9 is fixed to the top of the valve body 1 and is used to rotate the support adjusting screw 10. The rotation of the adjusting screw 10 can drive the lifting plate 11 to rise and fall, and at the same time slide on the surface of the limiting rod 12. The limiting rod 12 is used to limit the lifting plate 11. When the lifting plate 11 rises and falls, it drives the transmission clamp 14 to rise and fall, thereby realizing the function of locking the transmission clamp 14 into the transmission clamp 6 at the top of the adjusting shaft 5. This ensures that after the rotating handle is turned, it can cooperate with the transmission clamp 14 to drive the adjusting shaft 5 to rotate. When the butterfly valve plate 3 needs to be repaired or replaced, the transmission clamp 14 is disengaged from the transmission clamp 6 at the top of the adjusting shaft 5, so that the adjusting shaft 5 can be lifted upward. The protective cover 13 protects its interior. The whole system can be easily disassembled while allowing for corresponding rotation and adjustment, thus improving its adaptability.

[0027] Furthermore, such as Figure 1 and Figure 4 As shown, the inner wall of the valve cavity 2 is provided with a placement groove 15; a sealing ring 16 is engaged inside the placement groove 15; a support groove 17 adapted to the support shaft 4 is provided on the inner wall of the valve cavity 2; connecting grooves 18 are provided on both sides of the valve body 1; a placement base 19 is engaged on the surface of the valve body 1; a fixing bolt 20 is slidably connected to the surface of the valve body 1; one end of the fixing bolt 20 passes through the valve body 1 and the placement base 19 and extends to one side of the placement base 19; a fixing nut 21 is threadedly connected to the end of the fixing bolt 20 located on one side of the placement base 19. During operation, the placement groove 15 is used to place the sealing ring 16 to ensure the sealing effect on both sides of the butterfly valve plate 3, the support groove 17 is used to place the support shaft 4, the connecting groove 18 is used to connect external pipes, and the fixing bolt 20, together with the fixing nut 21, fixes the placement base 19 to the valve body 1, thereby supporting the valve body 1 and ensuring its stability during operation.

[0028] Working Principle: While the aforementioned patent provides a special double-eccentric soft-seal butterfly valve that improves overall valve performance and prevents clogging, the internal butterfly plate inevitably experiences surface corrosion during use, leading to contamination of the passing liquid. Furthermore, the double-eccentric soft-seal butterfly valve suffers from limited adaptability due to the difficulty in disassembly, replacement, or maintenance caused by the fixed limit bolts. During operation, the valve chamber 2 is located inside the valve body 1, and the butterfly valve plate 3 rotates within the valve chamber 2. The support shaft 4 supports and limits the butterfly valve plate 3, slightly engaging its surface to allow it to be removed from the valve chamber 2. A transmission locking block is also included. 6 and the transmission slot 7 cooperate to allow the adjusting shaft 5 to drive the butterfly valve plate 3 to rotate. Simultaneously, the adjusting nut 8 engages the adjusting shaft 5 into the valve body 1. During disassembly, simply rotate the adjusting nut 8 to pull the adjusting shaft 5 out of the surface of the butterfly valve plate 3. The support shaft 4 also engages with the butterfly valve plate 3, allowing the butterfly valve plate 3 to be removed for easy maintenance and replacement, improving its adaptability. The support frame 9 is fixed to the top of the valve body 1 and is used to rotate and support the adjusting screw 10. Rotation of the adjusting screw 10 drives the lifting plate 11 to rise and fall, while simultaneously sliding on the surface of the limiting rod 12. The limiting rod 12 limits the lifting plate 11. When the lifting plate 11... During lifting and lowering, the transmission retainer 14 is driven to move up and down, thereby locking the transmission retainer 14 into the transmission block 6 at the top of the adjusting shaft 5. This ensures that the rotating handle can rotate in conjunction with the transmission retainer 14 to drive the adjusting shaft 5 to rotate. When the butterfly valve plate 3 needs to be inspected or replaced, the transmission retainer 14 is disengaged from the transmission block 6 at the top of the adjusting shaft 5, making it easy to lift the adjusting shaft 5 upwards. The protective cover 13 protects its interior. The overall design allows for easy disassembly while also enabling corresponding rotational adjustments, improving its adaptability. The slot 15 is used to place the sealing ring 16 to ensure the sealing effect on both sides of the butterfly valve plate 3 and provide support. The groove 17 is used to place the support shaft 4, and the connecting groove 18 is used to connect the external pipe. The fixing bolt 20, together with the fixing nut 21, fixes the base 19 to the valve body 1, thereby supporting the valve body 1 and ensuring its stability during operation. By setting the transmission block 6 and the transmission groove 7, the adjusting shaft 5 can drive the butterfly valve plate 3 to rotate. At the same time, the adjusting nut 8 locks the adjusting shaft 5 into the valve body 1. When disassembling, simply rotate the adjusting nut 8 to pull the adjusting shaft 5 out from the surface of the butterfly valve plate 3. The support shaft 4 is also locked with the butterfly valve plate 3, thereby removing the butterfly valve plate 3 for easy maintenance and replacement, improving its adaptability.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An eccentric butterfly valve, characterized in that: The valve body (1) includes a valve cavity (2) inside the valve body (1); a butterfly valve plate (3) is rotatably connected to the inner wall of the valve cavity (2); a support shaft (4) is snapped onto the surface of the butterfly valve plate (3); an adjusting shaft (5) is snapped onto the surface of the butterfly valve plate (3); a transmission block (6) is fixedly connected to the top and bottom of the adjusting shaft (5); a transmission groove (7) is opened on the surface of the butterfly valve plate (3) and the inner wall of the valve cavity (2); an adjusting nut (8) is rotatably connected to the surface of the adjusting shaft (5); and the surface of the adjusting nut (8) is threadedly connected to the surface of the valve body (1).

2. The eccentric butterfly valve according to claim 1, characterized in that: A support frame (9) is fixedly connected to the top of the valve body (1); an adjusting screw (10) is rotatably connected to the surface of the support frame (9); a lifting plate (11) is threadedly connected to the surface of the adjusting screw (10); and a limit rod (12) is slidably connected to the surface of the lifting plate (11).

3. An eccentric butterfly valve according to claim 2, characterized in that: The bottom end of the limiting rod (12) is fixedly connected to the surface of the valve body (1); the top end of the adjusting screw (10) is fixedly connected to an adjusting spline; and a protective cover (13) is snapped onto the surface of the support frame (9).

4. An eccentric butterfly valve according to claim 2, characterized in that: The surface of the lifting plate (11) is rotatably connected to a transmission cylinder (14) adapted to the transmission block (6); the top of the transmission cylinder (14) is fixedly connected to a rotating handle; the number of the support frame (9), the adjusting screw (10) and the limiting rod (12) are all set to two, and the two support frames (9), adjusting screws (10) and limiting rods (12) are symmetrically arranged on both sides of the transmission cylinder (14).

5. An eccentric butterfly valve according to claim 1, characterized in that: The valve cavity (2) has a placement slot (15) on its inner wall; a sealing ring (16) is engaged inside the placement slot (15); the valve cavity (2) has a support groove (17) adapted to the support shaft (4); and the valve body (1) has connecting grooves (18) on both sides.

6. An eccentric butterfly valve according to claim 5, characterized in that: The valve body (1) is fitted with a base (19); a fixing bolt (20) is slidably connected to the surface of the valve body (1); one end of the fixing bolt (20) passes through the valve body (1) and the base (19) in sequence and extends to one side of the base (19); a fixing nut (21) is threaded to one end of the fixing bolt (20) located on one side of the base (19).

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