Sealing butterfly valve

Abstract

According to the technical scheme, the sealing butterfly valve is characterized by comprising a valve body and a butterfly plate arranged in a valve cavity of the valve body, a water inlet and a water outlet are formed in the two ends of the valve cavity, a control rod is fixedly installed in the middle of the butterfly plate in a penetrating and penetrating mode, and the inner wall of the valve body extends inwards with the center line of the control rod as a boundary to form staggered valve body protrusions. The valve body protrusion at the left end of the valve body is arranged on the water outlet side of the butterfly plate, the valve body protrusion at the right end of the valve body is arranged on the water inlet side of the butterfly plate, the valve body protrusions make contact with the butterfly plate, the valve body protrusions close to one side of the butterfly plate and the valve body are provided with arc faces, and continuous arcs are arranged on the upper end faces of the valve body protrusions. The contact surface of the valve body and the butterfly plate is changed by arranging the valve body, so that the butterfly plate is sealed and is not easy to damage, the valve body is provided with the continuous circular arc, so that fluid foreign matters are difficult to attach and accumulate, and the valve body bulge is arranged, so that a fluid medium can obtain a higher flow speed when passing through, and the valve body bulge and the butterfly plate are cleaned.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically to a sealing butterfly valve. Background Technology

[0002] Currently, butterfly valves are gate components used to control the flow and pressure of various fluids. They are widely used in petroleum, chemical, metallurgical, electric, heating, and water supply industries. The main advantages of butterfly valves are simple structure, small size, light weight, convenient operation, low flow resistance, and good sealing performance.

[0003] Currently, Chinese patent CN202420426957.1 discloses a butterfly valve for concentrated salt pipelines, including a valve body, an upper valve seat, a lower valve seat, a butterfly plate, a drive shaft, and a driven shaft. The upper valve seat and the lower valve seat are located on the inner wall of the valve body. The side of the lower valve seat near the inlet of the valve body is provided with a lower guide block with an inclined guide surface. The butterfly plate is located between the upper valve seat and the lower valve seat and is provided with an anti-corrosion layer. The drive shaft passes through the valve body and the upper valve seat and is connected to the butterfly plate for transmission. The driven shaft passes through the valve body and the lower valve seat and is connected to the butterfly plate for guidance. The rotation axis of the drive shaft has a set offset from the vertical symmetry line of the butterfly plate to drive the butterfly plate to rotate eccentrically.

[0004] However, the above-mentioned existing technology still has some defects. When closed, impurities may accumulate on the surface between the butterfly plate and the valve body, making it difficult to open the butterfly plate. Impurities may also adhere to the closed surface, affecting the sealing effect and causing leakage. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the present invention provides a sealing butterfly valve.

[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes a valve body, a butterfly plate disposed within the valve cavity of the valve body, an inlet and an outlet at both ends of the valve cavity, a control rod fixedly installed in the middle of the butterfly plate, and a staggered valve body protrusion extending inward from the center line of the control rod along the inner wall of the valve body. The valve body protrusion at the left end of the valve body is disposed on the outlet side of the butterfly plate, and the valve body protrusion at the right end of the valve body is disposed on the inlet side of the butterfly plate. The valve body protrusion contacts the butterfly plate, and a continuous arc is provided on the side of the valve body protrusion closest to the butterfly plate.

[0007] The present invention is further configured such that: the valve body protrusion has a groove on its end face, and the groove is used to install a waterproof strip.

[0008] The present invention is further configured such that: the butterfly plate is an olive shape with a thicker middle and thinner sides, and the control rod is located at the thickest part of the butterfly plate; the end face of the butterfly plate is provided with an arc-shaped concave surface.

[0009] The present invention is further configured such that: the butterfly plate is eccentrically designed, and the control rod is located near the right end of the valve body.

[0010] The present invention is further configured such that: the valve body protrusion is adapted to the end face of the butterfly plate, and there is a gap between the outer contour of the butterfly plate and the inner wall of the valve body.

[0011] In summary, this utility model has the following beneficial effects: by setting the valve body to change the multiple contact surfaces between the valve body and the butterfly plate, the butterfly plate seal is not easily damaged; the smooth continuous arc of the valve body makes it difficult for foreign matter to adhere and accumulate in the fluid; the valve body protrusion and the butterfly plate allow the fluid medium to obtain a high flow velocity when passing through the butterfly plate, cleaning the valve body protrusion and the butterfly plate; and the butterfly plate teeth make the accumulated impurities loose and easier to be flushed away. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0013] Figure 2 This is a partial sectional view from one side in this embodiment;

[0014] Figure 3 This is a cross-sectional view along direction AA in this embodiment;

[0015] Reference numerals: 1. Valve body; 11. Inlet; 12. Outlet; 2. Butterfly plate; 21. Control lever; 22. Arc-shaped concave surface; 23. Butterfly plate teeth; 3. Valve body protrusion; 31. Continuous arc; 32. Groove; 33. Waterproof strip. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings.

[0017] This embodiment discloses a sealing butterfly valve, such as Figures 1 to 3As shown, the valve includes a valve body 1 and a butterfly plate 2 disposed within the valve cavity of the valve body 1. The valve cavity has an inlet 11 and an outlet 12 at both ends. A control rod is fixedly installed in the middle of the butterfly plate 2. The inner wall of the valve body 1 extends inward from the center line of the control rod to form a staggered valve body protrusion 3. The valve body protrusion 3 at the left end of the valve body 1 is located on the outlet 12 side of the butterfly plate 2, and the valve body protrusion 3 at the right end of the valve body 1 is located on the inlet 11 side of the butterfly plate 2. The valve body protrusion 3 contacts the butterfly plate 2, and the contact surface between the valve body protrusion 3 and the butterfly plate 2 forms a seal. When the valve is closed, the fluid medium in the pipeline will not directly act on the contact surface, making the seal of the butterfly plate 2 less prone to damage and reducing leakage. A continuous arc 31 is provided on the side of the valve body protrusion 3 closest to the butterfly plate 2. The continuous arc 31 guides the flow of the fluid medium, increasing the flow velocity as the fluid medium passes through it; the continuous arc 31 eliminates dead angles, making it difficult for impurities in the fluid medium to adhere and easier for them to be carried away by the flowing fluid medium.

[0018] Further improvements include a groove 32 on the end face of the valve body protrusion 3, which is used to install a waterproof strip 33. The waterproof strip 33 serves as a seal; when closed, the flexible waterproof strip 33 reduces the impact on the butterfly plate 2, extending its service life.

[0019] Further improvements include an olive-shaped butterfly plate 2, thicker in the middle and thinner at the edges. The control lever 21 is positioned at the thickest point of the butterfly plate 2. This olive-shaped design guides the flow of the fluid medium. When the butterfly plate 2 is open, the fluid cross-section decreases while the flow rate remains constant, resulting in a higher flow velocity. This allows for a larger flow of water, reducing the accumulation of impurities and ensuring the high-velocity flow can effectively clean the valve body 1. The butterfly plate 2 also features an arc-shaped concave surface 22 on its end face. This concave end face and streamlined cross-section reduce the force exerted by the fluid medium, preventing energy waste and slowing the flow rate. Furthermore, the control lever 21 experiences less stress in the open state, making it more durable.

[0020] Further improvements include an eccentric design for the butterfly plate 2, with the control lever 21 positioned near the right end of the valve body 1. This design results in a larger area distribution on the left and a smaller area on the right for the butterfly plate 2. When closed, the left side of the butterfly plate 2 experiences greater pressure than the right side, and the left side of the butterfly plate 2 is supported by the valve body protrusion 3 on the left side, allowing the butterfly plate 2 to remain stably stationary and minimizing the torsional force on the control lever 21.

[0021] Further improvements include that the valve body protrusion 3 is adapted to the end face of the butterfly plate 2, and when closed, the outer contour of the butterfly plate 2 contacts the valve body protrusion 3 to form a second sealing contact surface, so that the present invention can achieve a good sealing effect when closed; the butterfly plate 2 is provided with butterfly plate teeth 23, and the waterproof strip will be more prone to impurity accumulation. The butterfly plate teeth 23 are round protrusions. When closed, the butterfly plate teeth 23 will hit the impurities attached to and accumulated on the waterproof strip 33. The impurities will be broken and the structure will be loosened, making it easier to detach and be washed away with the flow of the fluid medium.

[0022] Working principle of this utility model

[0023] Rotating the control lever 21 will cause the butterfly plate 2 to rotate, opening the valve body 1 of this novel type. The fluid medium flows from the inlet to the outlet 12. When the fluid medium passes through the butterfly plate 2 and the valve body protrusion 3, the flow rate will increase under the combined action of the butterfly plate 2 and the valve body protrusion 3. Impurities in the fluid medium with the increased flow rate are difficult to adhere to this novel type, but are washed away by the fluid medium.

[0024] Reverse rotation of control lever 21 causes the butterfly plate 2 to reverse, closing the valve body 1. The fluid medium is blocked on one side of the inlet 11 by the butterfly plate 2. The pressure of the fluid medium on the eccentrically designed butterfly plate 2 is concentrated on the left side, resulting in a good sealing effect.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing butterfly valve, comprising a valve body (1), a butterfly plate (2) disposed within a valve cavity of the valve body (1), wherein the valve cavity is provided with an inlet (11) and an outlet (12) at both ends, and a control rod (21) is inserted and fixedly installed in the middle of the butterfly plate (2), characterized in that: The inner wall of the valve body (1) extends inward from the center line of the control rod (21) to form a staggered valve body protrusion (3). The valve body protrusion (3) at the left end of the valve body (1) is located on the side of the outlet (12) of the butterfly plate (2), and the valve body protrusion (3) at the right end of the valve body (1) is located on the side of the inlet (11) of the butterfly plate (2). The valve body protrusion (3) contacts the butterfly plate (2), and the side of the valve body protrusion (3) near the butterfly plate (2) is provided with a continuous arc (31). The butterfly plate (2) is an olive shape with a thick middle and thin sides. The control rod (21) is located at the thickest part of the butterfly plate (2). The end face of the butterfly plate (2) is provided with an arc-shaped concave surface (22).

2. A sealing butterfly valve according to claim 1, characterized in that: The valve body protrusion (3) is provided with a groove (32) on the end face, and the groove (32) is used to install a waterproof strip (33).

3. A sealing butterfly valve according to claim 1, characterized in that: The butterfly plate (2) is eccentrically designed, and the control rod (21) is located near the valve body (1).

4. A sealing butterfly valve according to claim 3, characterized in that: The valve body protrusion (3) is adapted to the end face of the butterfly plate (2), and the butterfly plate (2) is provided with butterfly plate teeth (23).

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