Butterfly valve with high sealing performance

Abstract

The utility model belongs to the field of valves, particularly relates to a butterfly valve with high sealing performance, and aims to solve the problem that the sealing performance of the conventional butterfly valve is often difficult to meet the requirements of high-precision control occasions. In order to solve the problems that in the prior art, a sealing structure is usually complex and inconvenient to maintain and replace, once a sealing piece is aged or damaged, the whole sealing structure needs to be replaced, and the maintenance cost and time are increased, the following scheme is provided that the sealing structure comprises a valve body, a supporting frame is fixedly connected to the top of the valve body, and a valve rod rotationally penetrates through the top of the valve body; the outer wall of the valve rod is fixedly sleeved with a valve clack, the valve clack and the valve rod are fixedly connected through two first fixing screws which are symmetrically arranged, the sealing gasket is pushed to be attached to the sealing ring more tightly through the synergistic effect of the sliding circular plate, the mounting circular plate and the spring, the sealing effect is further improved, and if the sealing gasket is aged or damaged, the sealing gasket can be tightly attached to the sealing ring. The valve can be quickly replaced, the maintenance cost is reduced, the maintenance time is shortened, and the service life of the valve is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a high-sealing butterfly valve. Background Technology

[0002] In fluid control systems, butterfly valves are a common type of valve widely used in various industrial, civil, and commercial fields. Traditional butterfly valves typically consist of a valve body, valve stem, valve disc, and drive mechanism. Rotating the valve stem drives the valve disc to rotate within the valve body, thereby controlling the flow of fluid.

[0003] However, traditional butterfly valves have some shortcomings in practical applications. First, the sealing performance of traditional butterfly valves often fails to meet the requirements of high-precision control applications. Under high pressure or fluctuating pressure environments, leakage is prone to occur at the seal between the valve disc and the valve body, affecting the normal operation of the system. Second, the sealing structure of traditional butterfly valves is usually quite complex, making maintenance and replacement inconvenient. Once the seals age or are damaged, the entire sealing structure needs to be replaced, increasing maintenance costs and time. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing butterfly valves, whose sealing performance often fails to meet the demands of high-precision control applications. Under high pressure or fluctuating pressure environments, leakage easily occurs at the seal between the valve disc and the valve body, affecting the normal operation of the system. Furthermore, the sealing structure of traditional butterfly valves is typically complex, making maintenance and replacement inconvenient. Once the seals age or are damaged, the entire sealing structure needs to be replaced, increasing maintenance costs and time. Therefore, this invention proposes a butterfly valve with high sealing performance.

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

[0006] A high-sealing butterfly valve includes a valve body, a support frame fixedly connected to the top of the valve body, a valve stem rotatably passing through the top of the valve body, a valve disc fixedly sleeved on the outer wall of the valve stem, and the valve disc and the valve stem being fixedly connected by two symmetrically arranged first fixing screws;

[0007] A drive assembly, which is disposed on top of the support frame and is used to drive the valve stem to rotate;

[0008] A sealing assembly is disposed on one side of the valve disc and is used to improve the sealing performance of the device.

[0009] In one possible design, the drive assembly includes a rectangular box fixedly connected to the top of a support frame, an operating lever rotatably extending through one side of the rectangular box, a worm gear fixedly connected to one end of the operating lever, a valve stem extending into the interior of the rectangular box and fixedly fitted with a worm wheel, the worm gear meshing with the worm wheel, and a handwheel fixedly connected to one end of the operating lever.

[0010] In one possible design, the sealing assembly includes a circular groove formed on one side of the valve disc, one side of which is fixedly connected to the same mounting annular block by a plurality of second fixing screws, and a plurality of sealing gaskets are engaged between the mounting annular block and the inner wall of one side of the circular groove, with the plurality of sealing gaskets abutting against each other.

[0011] In one possible design, a sealing ring is fixedly embedded in the inner wall of the valve body, and the sealing ring abuts against the valve disc and cooperates with the sealing gasket.

[0012] In one possible design, a sliding circular plate is slidably connected to the inner wall of the mounting annular block, and a mounting circular plate is fixedly connected to one side of the sliding circular plate. A groove is formed on one side of the mounting circular plate, and a protruding plate is fixedly connected to the inner wall of one side of the groove. The protruding plate cooperates with the groove, and two symmetrically arranged springs are fixedly connected between one side of the protruding plate and one side of the inner wall of the groove.

[0013] In one possible design, the inner wall of the circular groove is slidably connected with multiple protrusions, one side of each protrusion is fixedly connected with a push rod, one end of the push rod passes through the valve disc and abuts against the sealing gasket, and the protrusion is used in conjunction with the mounting circular plate.

[0014] In one possible design, flanges are integrally formed at both ends of the valve body.

[0015] In this application, during use, by rotating the handwheel, the handwheel drives the operating lever to rotate, the operating lever drives the worm gear to rotate, the worm gear drives the worm wheel to rotate, the worm wheel drives the valve stem to rotate, and the valve stem drives the valve disc on the outer wall to rotate, thereby sealing the inner cavity of the valve body and realizing the opening and closing of the valve;

[0016] At this time, the sealing ring on the inner wall of the valve body abuts against the outer wall of the valve disc, which can ensure the sealing of the device. When water flows against the side facing the valve disc, it will squeeze the sliding circular plate to move laterally. The sliding circular plate drives the mounting circular plate to move laterally. The mounting circular plate squeezes the spring and moves on the outer wall of the convex plate.

[0017] At this point, one side of the mounting plate abuts against the inclined surface of the protrusion, which in turn causes multiple protrusions to move away from each other. The protrusions drive the push rod to move laterally, and one end of the push rod squeezes the sealing gasket. At this point, the sealing gasket abuts against the sealing ring, further improving the sealing performance of the device. In addition, multiple sealing gaskets are pressed against one side of the valve disc by the mounting ring block, and the sealing gaskets can be easily disassembled and replaced.

[0018] Beneficial effects:

[0019] The valve stem rotates by rotating the operating lever via a handwheel, which in turn drives the valve stem through the meshing of a worm gear and worm wheel. This drive method features a compact structure, a large transmission ratio, and easy control over the opening and closing of the valve, improving operational convenience and efficiency.

[0020] The sealing ring on the inner wall of the valve body abuts against the outer wall of the valve disc, forming a basic sealing structure. When the valve disc is subjected to water pressure, the sliding disc, mounting disc, and spring work together to push the sealing gasket to fit more tightly against the sealing ring, further improving the sealing effect. This dynamic sealing mechanism effectively prevents leakage and ensures the reliability of the valve under high pressure or fluctuating pressure environments.

[0021] The gasket is pressed against one side of the valve disc by an mounting ring block. This design makes the gasket easy to remove and replace. After long-term use, if the gasket ages or becomes damaged, it can be quickly replaced, reducing maintenance costs and time, and extending the valve's service life.

[0022] The integrally formed flanges at both ends of the valve body facilitate connection with other piping equipment, enhancing the overall structural strength and stability. Simultaneously, the valve design considers the impact of water flow pressure on sealing performance, and through an automatic adjustment mechanism using protrusions and a push rod, it ensures a good sealing condition under various operating conditions.

[0023] The valve's design fully considers safety during operation. The handwheel and drive assembly make operation more intuitive and easier to understand, reducing the risk of misoperation. At the same time, enhanced sealing performance prevents potential safety accidents caused by leakage. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of a high-sealing butterfly valve proposed in this utility model;

[0025] Figure 2 This is a side sectional view of the high-sealing butterfly valve proposed in this utility model.

[0026] Figure 3 for Figure 2 Enlarged view of section A;

[0027] Figure 4This is a three-dimensional cross-sectional view of the rectangular box in a high-sealing butterfly valve proposed in this utility model.

[0028] In the diagram: 1. Rectangular box; 2. Support frame; 3. Flange; 4. Valve disc; 5. Valve stem; 6. Handwheel; 7. Operating lever; 8. Valve body; 9. First fixing screw; 10. Protruding plate; 11. Sealing ring; 12. Sealing gasket; 13. Second fixing screw; 14. Mounting ring block; 15. Circular groove; 16. Spring; 17. Groove; 18. Mounting circular plate; 19. Protrusion; 20. Push rod; 21. Sliding circular plate; 22. Worm gear; 23. Worm wheel. Detailed Implementation

[0029] 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.

[0030] Example 1

[0031] Reference Figure 1-4 A butterfly valve includes: a valve body 8, a support frame 2 fixedly connected to the top of the valve body 8, a valve stem 5 rotatably passing through the top of the valve body 8, a valve disc 4 fixedly sleeved on the outer wall of the valve stem 5, and the valve disc 4 and the valve stem 5 being fixedly connected by two symmetrically arranged first fixing screws 9.

[0032] The drive assembly is located on the top of the support frame 2 and is used to drive the valve stem 5 to rotate. The drive assembly includes a rectangular box 1 fixedly connected to the top of the support frame 2. An operating rod 7 is rotatably passed through one side of the rectangular box 1. A worm gear 22 is fixedly connected to one end of the operating rod 7. The top of the valve stem 5 extends into the interior of the rectangular box 1 and is fixedly fitted with a worm wheel 23. The worm gear 22 meshes with the worm wheel 23. A handwheel 6 is fixedly connected to one end of the operating rod 7. By rotating the handwheel 6, the handwheel 6 drives the operating rod 7 to rotate, the operating rod 7 drives the worm gear 22 to rotate, the worm gear 22 drives the worm wheel 23 to rotate, the worm wheel 23 drives the valve stem 5 to rotate, and the valve stem 5 drives the valve disc 4 on the outer wall to rotate, thereby sealing the inner cavity of the valve body 8 and realizing the opening and closing of the valve.

[0033] A sealing assembly is located on one side of the valve disc 4 and is used to improve the sealing performance of the device. The sealing assembly includes a circular groove 15 on one side of the valve disc 4. A mounting annular block 14 is fixedly connected to one side of the circular groove 15 by multiple second fixing screws 13. Multiple sealing gaskets 12 are engaged between the mounting annular block 14 and the inner wall of one side of the circular groove 15, and the multiple sealing gaskets 12 abut against each other. A sealing ring 11 is fixedly embedded in the inner wall of the valve body 8. The sealing ring 11 abuts against the valve disc 4 and cooperates with the sealing gasket 12. A sliding circular plate 21 is slidably connected to the inner wall of the mounting annular block 14. A mounting circular plate 18 is fixedly connected to one side of the sliding circular plate 21. A groove 17 is opened on one side of the mounting circular plate 18. A protruding plate 10 is fixedly connected to the inner wall of one side of the circular groove 15. The protruding plate 10 cooperates with the groove 17. At this time, the sealing ring 11 on the inner wall of the valve body 8 abuts against the outer wall of the valve disc 4, which can ensure the sealing performance of the device. When water flows against the side of the valve disc 4, it will squeeze the sliding ring 11. The circular plate 21 moves laterally, and the sliding circular plate 21 drives the mounting circular plate 18 to move laterally. The mounting circular plate 18 compresses the spring 16 and moves on the outer wall of the convex plate 10. Two symmetrically arranged springs 16 are fixedly connected between one side of the convex plate 10 and the inner wall of one side of the groove 17. Multiple protrusions 19 are slidably connected to the inner wall of the circular groove 15. A push rod 20 is fixedly connected to one side of the protrusion 19. One end of the push rod 20 passes through the valve disc 4 and abuts against the sealing gasket 12. The protrusion 19 works in conjunction with the mounting circular plate 18. At this time, one side of the mounting circular plate 18 abuts against the inclined surface of the protrusion 19, which can drive the multiple protrusions 19 to move away from each other. The protrusion 19 drives the push rod 20 to move laterally. One end of the push rod 20 compresses the sealing gasket 12. At this time, the sealing gasket 12 abuts against the sealing ring 11, which further improves the sealing performance of the device. The multiple sealing gaskets 12 are pressed against one side of the valve disc 4 by the mounting annular block 14, and the sealing gaskets 12 can be easily disassembled and replaced.

[0034] This application can be used in the field of valves, or in other fields applicable to this application.

[0035] Example 2

[0036] refer to Figure 1-4 An improvement based on Example 1: a high-sealing butterfly valve, which is applied in the valve field, wherein both ends of the valve body 8 are integrally formed with flanges 3.

[0037] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0038] 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 the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-sealing butterfly valve, characterized in that, include: The valve body (8) has a support frame (2) fixedly connected to its top. The valve stem (5) is rotatably passed through the top of the valve body (8). A valve disc (4) is fixedly sleeved on the outer wall of the valve stem (5). The valve disc (4) and the valve stem (5) are fixedly connected by two first fixing screws (9) arranged symmetrically. A drive assembly is disposed on top of the support frame (2) and is used to drive the valve stem (5) to rotate; A sealing assembly is provided on one side of the valve disc (4) and is used to improve the sealing performance of the valve. The sealing assembly includes a circular groove (15) on one side of the valve disc (4). One side of the circular groove (15) is fixedly connected to the same mounting annular block (14) by multiple second fixing screws (13). Multiple sealing gaskets (12) are engaged between the mounting annular block (14) and the inner wall of one side of the circular groove (15). The multiple sealing gaskets (12) abut against each other. A sealing ring (11) is fixedly embedded in the inner wall of the valve body (8). The sealing ring (11) abuts against the valve disc (4) and cooperates with the sealing gaskets (12). A sliding circular plate (21) is slidably connected to the inner wall of the mounting annular block (14). A mounting plate (18) is fixedly connected to one side of the sliding circular plate (21). A groove (17) is provided on one side of the mounting plate (18). A protruding plate (10) is fixedly connected to the inner wall of one side of the circular groove (15). The protruding plate (10) cooperates with the groove (17). Two springs (16) are symmetrically arranged between one side of the protruding plate (10) and the inner wall of one side of the groove (17). A plurality of protrusions (19) are slidably connected to the inner wall of the circular groove (15). A push rod (20) is fixedly connected to one side of the protrusion (19). One end of the push rod (20) passes through the valve disc (4) and abuts against the sealing gasket (12). The protrusion (19) cooperates with the mounting plate (18).

2. The high-sealing butterfly valve according to claim 1, characterized in that, The drive assembly includes a rectangular box (1) fixedly connected to the top of the support frame (2). An operating rod (7) is rotatably passed through one side of the rectangular box (1). A worm gear (22) is fixedly connected to one end of the operating rod (7). The top of the valve stem (5) extends into the interior of the rectangular box (1) and is fixedly fitted with a worm wheel (23). The worm gear (22) meshes with the worm wheel (23). A handwheel (6) is fixedly connected to one end of the operating rod (7).

3. The high-sealing butterfly valve according to claim 1, characterized in that, Both ends of the valve body (8) are integrally formed with flanges (3).

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