An eccentric butterfly valve with low torque operation

Abstract

The utility model relates to valve technical field, concretely is a kind of eccentric butterfly valve of low torque operation, including valve body, the inside installation of valve body has valve plate and rotating rod, valve plate outside is equipped with sealing assembly;The sealing assembly includes rubber block, rubber block is fixedly connected with valve plate, rubber block outer ring is fixedly connected with boss ring, outer push subassembly is installed between valve plate and boss ring, and the outer push subassembly includes elastic plate, the lateral groove for accommodating elastic plate is set up in the side of valve plate, and elastic plate is fixedly connected with the inner wall of lateral groove, and the one end fixedly connected with push plate of elastic plate is close to boss ring, and the length of elastic plate is greater than the maximum distance between lateral groove and boss ring.Solved the valve plate of current butterfly valve after long time use still can cause water leakage due to abrasion, difficult to keep the extrusion degree between valve plate and valve body, still difficult to maintain and valve body extrusion sealing technical problem after the abrasion of valve plate.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to an eccentric butterfly valve with low torque operation. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve that can be used for on / off control of low-pressure pipeline media. A search revealed a patent with application number CN202322737736.4, which discloses a low-torque eccentric butterfly valve. When the rotating rod rotates, the moving rod inserts into the groove and contacts the waterproof gasket, sealing the pipeline. Simultaneously, the sliding block moves and compresses the spring, thus preventing contact wear between the valve plate and the inner wall of the eccentric butterfly valve body during pipeline sealing. This extends the valve plate's service life and reduces the frequency of valve plate replacement.

[0003] The above-mentioned device slows down the wear rate of the valve plate, but after long-term use, the valve plate will still leak water due to wear, making it difficult to maintain the squeezing force between the valve plate and the valve body. After the valve plate wears, it is still difficult to maintain the squeezing seal with the valve body. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a low-torque eccentric butterfly valve, which solves the technical problem that existing butterfly valves still leak water due to wear of the valve plate after long-term use, making it difficult to maintain the squeezing force between the valve plate and the valve body, and making it difficult to maintain the squeezing seal between the valve plate and the valve body even after the valve plate has worn down.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A low-torque-operated eccentric butterfly valve includes a valve body, wherein a valve plate and a rotating rod are installed inside the valve body, and a sealing assembly is installed outside the valve plate.

[0007] The sealing assembly includes a rubber block, which is fixedly connected to a valve plate. A convex ring is fixedly connected to the outer ring of the rubber block, and an outward push assembly is installed between the valve plate and the convex ring.

[0008] Furthermore, the push assembly includes an elastic plate, and a transverse groove for accommodating the elastic plate is provided on one side of the valve plate. The elastic plate is fixedly connected to the inner wall of the transverse groove, and a push plate is fixedly connected to one end of the elastic plate near the convex ring.

[0009] Furthermore, the length of the elastic plate is greater than the maximum distance between the transverse groove and the convex ring, and multiple side plates are fixedly connected to the side of the elastic plate away from the valve plate.

[0010] Furthermore, the rubber block has an arc-shaped groove inside, which is filled with multiple rubber balls and water.

[0011] Furthermore, a hollow ball is installed inside the rubber ball, and a spring is fixedly connected to the bottom of the rubber ball.

[0012] Furthermore, the diameter of the rubber block is larger than the inner diameter of the valve body, and the rubber block extends into the interior of the valve plate.

[0013] By employing the above technical solution, this utility model provides an eccentric butterfly valve with low torque operation, which has at least the following beneficial effects:

[0014] 1. The present invention, through the sealing component, can provide the valve plate to push the valve body outward, reducing the possibility of water leakage due to wear of the valve plate after long-term use, maintaining the squeezing force between the valve plate and the valve body, so that the sealing component on the valve plate can still squeeze the valve body even after wear, maintaining the sealing between the valve plate and the valve body.

[0015] 2. By using the side plate, this utility model can increase the force that pushes the convex ring to move outward by the water flow passing through the valve, so that the convex ring can squeeze the valve body with greater force, thereby improving the sealing degree between the valve plate and the valve body.

[0016] 3. This utility model, through the setting of rubber balls and springs, can squeeze the rubber block outward from different positions, so that different positions of the rubber block can squeeze the valve body to improve the sealing between the valve body and the valve body. At the same time, after the rubber block is squeezed, the rubber balls filled inside can move flexibly to provide cushioning. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the valve plate of this utility model;

[0020] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A;

[0021] Figure 4 This is an internal cross-sectional view of the rubber block of this utility model.

[0022] In the diagram: 1. Valve body; 2. Valve plate; 3. Rotating rod; 4. Sealing assembly; 41. Rubber block; 42. Convex ring; 43. Push assembly; 431. Elastic plate; 432. Push plate; 5. Side plate; 6. Arc groove; 7. Rubber ball; 8. Hollow ball; 9. Spring. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example

[0025] To maintain the compressive force on the valve body even after the valve plate wears, and to reduce the possibility of leakage due to valve plate wear, please refer to... Figures 1-4 This embodiment proposes a low-torque eccentric butterfly valve, including a valve body 1. A valve plate 2 and a rotating rod 3 are installed inside the valve body 1. A sealing assembly 4 is installed on the outside of the valve plate 2. The sealing assembly 4 includes a rubber block 41, which is fixedly connected to the valve plate 2. A convex ring 42 is fixedly connected to the outer ring of the rubber block 41. An outward push assembly 43 is installed between the valve plate 2 and the convex ring 42. The outward push assembly 43 includes an elastic plate 431. A transverse groove for accommodating the elastic plate 431 is opened on one side of the valve plate 2. The elastic plate 431 is fixedly connected to the inner wall of the transverse groove. A push plate 432 is fixedly connected to the end of the elastic plate 431 near the convex ring 42.

[0026] In use, the elastic plate 431 is in a bent state. The elastic force of the elastic plate 431 pushes the convex ring 42 to move towards the outer ring of the valve plate 2, thereby expanding the overall diameter of the valve plate 2 and the sealing assembly 4 until the convex ring 42 is blocked by the inner wall of the valve body 1. During the rotation of the valve plate 2, the convex ring 42 contacts and rubs against the valve body 1. After the convex ring 42 wears, the elastic plate 431 pushes the convex ring 42 to move towards the outer ring, so that the convex ring 42 still squeezes the valve body 1. This provides the valve plate 2 with the thrust to squeeze the valve body 1 towards the outer ring, reducing the possibility of water leakage due to wear of the valve plate after long-term use. It maintains the squeezing force between the valve plate and the valve body, so that the sealing assembly 4 on the valve plate 2 can still squeeze the valve body 1 even after it is worn, maintaining the sealing between the valve plate 2 and the valve body 1.

[0027] To enhance the effect of pressing the convex ring 42 outwards, and to push the convex ring 42 towards the valve body 1 with greater force, thereby strengthening the sealing between the valve plate 2 and the valve body 1, refer to... Figure 2 and Figure 3The length of the elastic plate 431 is greater than the maximum distance between the transverse groove and the convex ring 42. Multiple side plates 5 are fixedly connected to the side of the elastic plate 431 away from the valve plate 2.

[0028] In use, the side plate 5 obstructs the water flowing through the valve body 1. When the water flows through the valve body 1, the side plate 5 is pushed by the water flow, which increases the thrust of the elastic plate 431 and the side plate 5 as a whole. This promotes the elastic plate 431 to bend towards the valve plate 2, causing the elastic plate 431 to tend to move onto a plane. Since one end of the elastic plate 431 is blocked by the transverse groove, it will extend to the other end, generating an outward thrust on the convex ring 42. The water flow through the valve can be used to increase the force that pushes the convex ring 42 to move outward, so that the convex ring 42 can squeeze the valve body 1 with greater force, thereby improving the sealing degree between the valve plate 2 and the valve body 1.

[0029] To compress the rubber block 41 from different positions to extend it outwards, and to enhance the deformation buffering capacity of the rubber block 41 when it is compressed, refer to... Figure 4 The rubber block 41 has an arc-shaped groove 6 inside, and multiple rubber balls 7 are filled inside the arc-shaped groove 6. Water is filled inside the arc-shaped groove 6, and hollow balls 8 are installed inside the rubber balls 7. A spring 9 is fixedly connected to the bottom of the rubber balls 7. The diameter of the rubber block 41 is larger than the inner diameter of the valve body 1, and the rubber block 41 extends into the valve plate 2.

[0030] In use, the rubber ball 7 and the hollow ball 8 are inside the rubber block 41. Under the combined action of the elastic force of the spring 9 and the buoyancy of the water inside the rubber block 41, the rubber ball 7 moves to different heights inside the rubber block 41. When the rubber block 41 squeezes the valve body 1, the rubber block 41 is squeezed and deformed by the reaction force of the valve body 1, which pushes the rubber ball 7 inside it to move along the arc groove 6. The rubber ball 7 also plays the role of separating the water in the arc groove 6, preventing the weight of the water in the arc groove 6 from acting entirely on the bottom of the rubber block 41. It can squeeze the rubber block 41 outward from different positions, so that different positions of the rubber block 41 can squeeze the valve body 1 to improve the sealing between them. At the same time, after the rubber block 41 is squeezed, the rubber ball 7 inside it can move flexibly to provide cushioning.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-torque-operated eccentric butterfly valve, comprising a valve body (1), characterized in that, The valve body (1) is equipped with a valve plate (2) and a rotating rod (3) inside, and a sealing assembly (4) is installed on the outside of the valve plate (2). The sealing assembly (4) includes a rubber block (41), which is fixedly connected to the valve plate (2). A convex ring (42) is fixedly connected to the outer ring of the rubber block (41), and an outward push assembly (43) is installed between the valve plate (2) and the convex ring (42).

2. The eccentric butterfly valve with low torque operation according to claim 1, characterized in that, The push assembly (43) includes an elastic plate (431). A transverse groove for accommodating the elastic plate (431) is provided on one side of the valve plate (2). The elastic plate (431) is fixedly connected to the inner wall of the transverse groove. A push plate (432) is fixedly connected to one end of the elastic plate (431) near the protruding ring (42).

3. The eccentric butterfly valve with low torque operation according to claim 2, characterized in that, The length of the elastic plate (431) is greater than the maximum distance between the transverse groove and the convex ring (42), and multiple side plates (5) are fixedly connected to the side of the elastic plate (431) away from the valve plate (2).

4. The eccentric butterfly valve with low torque operation according to claim 1, characterized in that, The rubber block (41) has an arc-shaped groove (6) inside, and the arc-shaped groove (6) is filled with multiple rubber balls (7) and water.

5. The eccentric butterfly valve with low torque operation according to claim 4, characterized in that, A hollow ball (8) is installed inside the rubber ball (7), and a spring (9) is fixedly connected to the bottom of the rubber ball (7).

6. The eccentric butterfly valve with low torque operation according to claim 1, characterized in that, The diameter of the rubber block (41) is larger than the inner diameter of the valve body (1), and the rubber block (41) extends into the interior of the valve plate (2).

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