Butterfly valve sealing structure

Abstract

The utility model discloses a butterfly valve sealing structure which comprises a butterfly valve body, a valve seat is arranged below the butterfly valve body, a butterfly plate is arranged in the middle of the interior of the valve seat, a wall face reinforcing lining is arranged at the position, aligned with the butterfly plate, of the inner wall of the valve seat, and a concave face is arranged in the center of the surface of the wall face reinforcing lining. Valve rod assembling openings are formed in the upper position and the lower position of one side of the butterfly plate, a sealing plate is arranged on the other side of the butterfly plate, a butterfly plate sealing gasket is arranged between the sealing plate and the butterfly plate, and an invisible notch is formed in the inner ring position of the surface of the sealing plate. The wall surface reinforcing bushing is arranged on the inner wall surface of the valve seat, and the inclined surface structures are arranged on the two sides of the wall surface reinforcing bushing and can play a role in guiding the opening and closing positions of the butterfly plate, so that the surfaces on the two sides of the wall surface reinforcing bushing are smoother and smoother, the friction between the surfaces in contact with the butterfly plate is reduced, and the service life of the butterfly plate is prolonged. And the service life of the butterfly plate sealing gasket is prolonged.

Description

Technical Field

[0001] The utility model relates to the relevant field of butterfly valves, in particular to a butterfly valve sealing structure. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for the on-off control of low-pressure pipeline media. A butterfly valve refers to a valve with a closing member as a disc, which rotates around the valve axis to achieve opening and closing. The valve 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, and mainly plays the role of cutting off and throttling in pipelines.

[0003] There are still certain drawbacks in the use of butterfly valves in the prior art. The sealing structure in a traditional butterfly valve is usually to install a sealing gasket on the butterfly plate. The structure is too simple. The edge of the butterfly plate will be worn during the opening and closing process. Under long-term wear, the sealing gasket will become loose or deformed, affecting the sealing performance of the butterfly valve and reducing the service life of the sealing gasket. Utility Model Content

[0004] The purpose of the utility model is to provide a butterfly valve sealing structure to solve the problem that the sealing structure in the traditional butterfly valve proposed in the above background technology is usually to install a sealing gasket on the butterfly plate, the structure is too simple, and the edge of the butterfly plate will be worn during the opening and closing process. In the case of long-term wear, the sealing gasket will become loose or deformed, affecting the sealing performance of the butterfly valve and reducing the service life of the sealing gasket.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a butterfly valve sealing structure, including a butterfly valve body, a valve seat is provided below the butterfly valve body, a butterfly plate is provided in the middle position inside the valve seat, a wall reinforcement bushing is provided at a position where the inner wall of the valve seat is aligned with the butterfly plate, a concave surface is provided at the center position of the surface of the wall reinforcement bushing, valve stem assembly ports are provided at the upper and lower positions on one side of the butterfly plate, a sealing plate is provided on the other side of the butterfly plate, a butterfly plate sealing gasket is provided between the sealing plate and the butterfly plate, and an invisible recess is provided at the inner circle position of the surface of the sealing plate.

[0006] In a further embodiment, the cross section of the concave surface is set to an inwardly concave arc structure, the cross section of the butterfly plate sealing gasket is set to an outwardly convex arc structure, and the butterfly plate sealing gasket is connected to the concave surface by inlaying.

[0007] In a further embodiment, the wall reinforcement bushing is made of stainless steel metal, two sides of the wall reinforcement bushing are set as inclined structures, and the wall reinforcement bushing is fixedly connected to the valve seat by a first fixing screw.

[0008] In a further embodiment, the butterfly plate sealing gasket is connected to the butterfly plate by inlaying, and the outer ring of the sealing plate is connected to the butterfly plate by an assembling block and a combined groove, the assembling block and the combined groove are fixedly connected by threads, and the center position of the sealing plate and the center position of the butterfly plate are connected by a positioning bayonet and a positioning block.

[0009] In a further embodiment, a plurality of notches are provided at the edge of the outer ring of the sealing plate, and the shape of the notches is provided with a triangular structure.

[0010] In a further embodiment, the sealing plate and the butterfly plate sealing gasket are fixedly connected via a locking block, and the sealing plate, the butterfly plate and the butterfly plate sealing gasket are fixedly connected via a second fixing screw and a fixing screw hole.

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

[0012] 1. In the utility model, a wall reinforcement bushing is provided on the inner wall surface of the valve seat, and both sides of the wall reinforcement bushing are set as inclined structures. The inclined structure can guide the opening and closing position of the butterfly plate, making the surfaces on both sides of the wall reinforcement bushing smoother and flatter, reducing the friction between the surfaces in contact with the butterfly plate, and extending the service life of the butterfly plate sealing gasket. A concave surface is provided inside the wall reinforcement bushing, and the concave surface can strengthen the tightness of the inlay of the butterfly plate sealing gasket and the wall reinforcement bushing, thereby increasing the sealing performance of the butterfly plate closure.

[0013] 2. The position of the butterfly plate sealing gasket in the utility model is fixed by a sealing plate. This installation method can ensure the firmness of the butterfly plate sealing gasket installation, prevent the butterfly plate sealing gasket from loosening or deformation, and extend the service life of the butterfly plate sealing gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a butterfly valve sealing structure of the utility model;

[0015] Figure 2 It is a side view of the butterfly plate of the utility model;

[0016] Figure 3 This is a schematic diagram of the split structure of the butterfly plate of the utility model;

[0017] Figure 4 It is a front view of the butterfly plate of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the combined slot of the utility model;

[0019] Figure 6 It is a structural schematic diagram of the sealing plate of the utility model.

[0020] In the figure: 1. Butterfly valve body; 2. Valve seat; 3. Wall reinforcement bushing; 4. Valve stem assembly port; 5. Butterfly plate; 6. Butterfly plate sealing gasket; 7. Sealing plate; 8. Combination groove; 9. Positioning block; 10. First fixing screw; 11. Locking block; 12. Assembly block; 13. Notch; 14. Second fixing screw; 15. Concave surface; 16. Invisible notch; 17. Fixing screw hole; 18. Positioning bayonet. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] See also Figure 1-6 The utility model provides an embodiment: a butterfly valve sealing structure, including a butterfly valve body 1, a valve seat 2 is provided below the butterfly valve body 1, a butterfly plate 5 is provided in the middle position inside the valve seat 2, a wall reinforcement bushing 3 is provided at the position where the inner wall of the valve seat 2 is aligned with the butterfly plate 5, a concave surface 15 is provided at the center position of the surface of the wall reinforcement bushing 3, a valve stem assembly port 4 is provided at the upper and lower positions of one side of the butterfly plate 5, a sealing plate 7 is provided on the other side of the butterfly plate 5, a butterfly plate sealing gasket 6 is provided between the sealing plate 7 and the butterfly plate 5, and the inner surface of the sealing plate 7 is provided with a butterfly plate sealing gasket 6. An invisible notch 16 is provided at the position of the ring; the valve seat 2 is used to install and fix the butterfly plate 5, and the valve seat 2 is opened or closed by the butterfly plate 5. The wall reinforcement bushing 3 is used to increase the sealing performance of the butterfly plate sealing gasket 6 and reduce the friction between the butterfly plate sealing gasket 6 and the inner wall of the valve seat 2. The sealing plate 7 is used to seal one side of the butterfly plate 5 and fix the position of the butterfly plate sealing gasket 6. The butterfly plate sealing gasket 6 is used to seal the closed position of the butterfly plate 5. The invisible notch 16 facilitates the handheld installation or removal operation of the sealing plate 7.

[0023] The cross section of the concave surface 15 is set as an inwardly concave arc structure, the cross section of the butterfly plate sealing gasket 6 is set as an outwardly convex arc structure, and the butterfly plate sealing gasket 6 and the concave surface 15 are connected by inlaying, which makes it easy to combine or separate the butterfly plate sealing gasket 6 and the concave surface 15.

[0024] The wall reinforcement bushing 3 is made of stainless steel metal, and both sides of the wall reinforcement bushing 3 are set to be inclined structures, and the wall reinforcement bushing 3 is fixedly connected to the valve seat 2 by a first fixing screw 10. Through the inclined structure of the wall reinforcement bushing 3, the two sides of the wall reinforcement bushing 3 can have an inclined surface, thereby reducing the friction between the butterfly plate sealing gasket 6 and the wall reinforcement bushing 3.

[0025] The butterfly plate sealing gasket 6 is connected to the butterfly plate 5 by inlaying, and the outer ring of the sealing plate 7 is connected to the butterfly plate 5 through the assembly block 12 and the combination groove 8, the assembly block 12 and the combination groove 8 are fixedly connected by threads, and the center position of the sealing plate 7 and the center position of the butterfly plate 5 are connected by the positioning bayonet 18 and the positioning block 9, and the sealing plate 7 is convenient to install by connecting the assembly block 12 with the combination groove 8; a plurality of notches 13 are provided at the edge position of the outer ring of the sealing plate 7, and the shape of the notch 13 is provided with a triangular structure, and the notch 13 is used to increase the anti-slip property between the sealing plate 7 and the butterfly plate sealing gasket 6, so that the connection between the two structures is tighter; the sealing plate 7 and the butterfly plate sealing gasket 6 are fixedly connected by the locking block 11, and the sealing plate 7, the butterfly plate 5 and the butterfly plate sealing gasket 6 are fixedly connected by the second fixing screw 14 and the fixing screw hole 17, and the locking block 11 is used to strengthen the firmness of the sealing plate 7.

[0026] Working principle: When in use, install the wall reinforcement bushing 3 at the required position in the valve seat 2, fix it with the first fixing screw 10, inlay the butterfly plate sealing gasket 6 on one side of the butterfly plate 5, hold the invisible recess 16, align it with the combination groove 8 through the assembly block 12, install the sealing plate 7 on one side of the butterfly plate 5, and rotate and tighten it so that the locking block 11 is tightly connected with the butterfly plate sealing gasket 6, and fix the sealing plate 7, butterfly plate sealing gasket 6 and butterfly plate 5 together through the second fixing screw 14 and the fixing screw hole 17, then install the butterfly plate 5 inside the valve seat 2, and connect and fix it with the valve stem through the valve stem assembly port 4. When the butterfly plate 5 is closed, the butterfly plate 5 is completely sealed by inlaying the butterfly plate sealing gasket 6 with the concave surface 15 in the wall reinforcement bushing 3.

[0027] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A butterfly valve sealing structure, comprising a butterfly valve body (1), characterized in that: A valve seat (2) is provided below the butterfly valve body (1), a butterfly plate (5) is provided in the middle position inside the valve seat (2), a wall reinforcement bushing (3) is provided at a position where the inner wall of the valve seat (2) is aligned with the butterfly plate (5), a concave surface (15) is provided at the center position of the surface of the wall reinforcement bushing (3), valve stem assembly ports (4) are provided at upper and lower positions on one side of the butterfly plate (5), a sealing plate (7) is provided on the other side of the butterfly plate (5), a butterfly plate sealing gasket (6) is provided between the sealing plate (7) and the butterfly plate (5), and an invisible recess (16) is provided at the inner circle position of the surface of the sealing plate (7).

2. A butterfly valve sealing structure according to claim 1, characterized in that: The cross section of the concave surface (15) is set to an inwardly concave arc structure, the cross section of the butterfly plate sealing gasket (6) is set to an outwardly convex arc structure, and the butterfly plate sealing gasket (6) and the concave surface (15) are connected by inlaying.

3. A butterfly valve sealing structure according to claim 1, characterized in that: The wall reinforcement bushing (3) is made of stainless steel metal, two sides of the wall reinforcement bushing (3) are arranged as inclined structures, and the wall reinforcement bushing (3) is fixedly connected to the valve seat (2) via a first fixing screw (10).

4. A butterfly valve sealing structure according to claim 1, characterized in that: The butterfly plate sealing gasket (6) is connected to the butterfly plate (5) by embedding, and the outer ring of the sealing plate (7) is connected to the butterfly plate (5) by an assembly block (12) and a combination groove (8), the assembly block (12) and the combination groove (8) are fixedly connected by threads, and the center position of the sealing plate (7) and the center position of the butterfly plate (5) are connected by a positioning bayonet (18) and a positioning block (9) by embedding.

5. A butterfly valve sealing structure according to claim 1, characterized in that: A plurality of notches (13) are provided at the edge of the outer ring of the sealing plate (7), and the shape of the notches (13) is provided with a triangular structure.

6. A butterfly valve sealing structure according to claim 1, characterized in that: The sealing plate (7) and the butterfly plate sealing gasket (6) are fixedly connected via a locking block (11), and the sealing plate (7), the butterfly plate (5) and the butterfly plate sealing gasket (6) are fixedly connected via a second fixing screw (14) and a fixing screw hole (17).

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