A butterfly valve sealing structure

Abstract

The utility model discloses a butterfly valve sealing structure, including a valve body, a sealing valve cover is fixedly installed on the top of the valve body by screws, a sealing sleeve is arranged inside the valve body, a sealing steel ring is arranged inside the valve body, a sealing bearing is fixedly inlaid on the inner wall of the sealing steel ring, a butterfly plate is arranged inside the sealing steel ring, a valve stem is fixedly connected inside the butterfly plate, and the bottom end of the valve stem is connected to the inner ring of a sealing bearing. The device arranges a sealing steel ring inside the valve body, and the sealing steel ring and the butterfly plate are sealed by the sealing ring. In order to avoid the situation of poor sealing after the sealing ring between the butterfly plate and the sealing steel ring is worn, two arc strips are arranged on the inner wall of the sealing steel ring. The arc strips are designed according to the closing direction of the butterfly plate and will not affect the rotation of the butterfly plate. After the butterfly plate is closed, the butterfly plate and the sealing ring can be in close contact with the sealing gasket on the arc strip, thereby achieving a further sealing effect.

Description

Technical Field

[0001] The utility model relates to the technical 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 that can be used for on-off control of low-pressure pipeline media. A butterfly valve refers to a valve with a closing member as a disc that 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. It mainly plays a cutting and throttling role in the pipeline. The butterfly valve opening and closing member is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulation.

[0003] The butterfly valve is mainly composed of a valve body, a valve stem, a butterfly plate and a sealing ring. The valve body is cylindrical, with a short axial length and a built-in butterfly plate. The butterfly valve has the characteristics of simple structure, small size, light weight, low material consumption, small installation size, rapid switching, 90-degree reciprocating rotation, and small driving torque. It is used to cut off, connect, and regulate the medium in the pipeline. At present, most butterfly valves have a sealing ring set on the butterfly plate to form a seal between the cylinder inside the valve body. When the butterfly valve is opened and closed many times, friction is easily generated between the sealing ring and the valve body, resulting in damage to the sealing ring, thereby affecting the sealing effect of the butterfly valve. To this end, we propose a butterfly valve sealing structure to solve the above problems. Utility Model Content

[0004] The purpose of the present utility model is to provide a butterfly valve sealing structure to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A butterfly valve sealing structure includes a valve body, a sealing valve cover is fixedly installed on the top of the valve body by screws, a sealing sleeve is provided inside the valve body, a sealing steel ring is provided inside the valve body, a sealing bearing is fixedly inlaid on the inner wall of the sealing steel ring, a butterfly plate is provided inside the sealing steel ring, a valve stem is fixedly connected to the inside of the butterfly plate, the bottom end of the valve stem is connected to the inner ring of a sealing bearing, the top of the valve stem passes through another sealing bearing, the sealing sleeve and the sealing valve cover in sequence and extends to the top of the sealing valve cover, the outer surface of the butterfly plate is fixedly connected to the sealing ring, the outer surface of the sealing ring is in contact with the inner wall of the sealing steel ring, the inner wall of the sealing steel ring is fixedly connected to two arcuate strips, and the side surfaces of the two arcuate strips close to each other are fixedly connected to sealing gaskets.

[0007] In a further embodiment, the two arc-shaped strips are respectively located on both sides of the butterfly plate, and the side surfaces of the two sealing gaskets close to each other are in contact with the outer surface of the butterfly plate and the outer surface of the sealing ring.

[0008] In a further embodiment, both left and right ends of the valve body are fixedly connected with connection plates, and a plurality of connection holes are provided on the side surfaces of the two connection plates that are away from each other.

[0009] In a further embodiment, a fixing ear is fixedly connected to the outer surface of the valve body, and a through opening is opened in the middle of the fixing ear.

[0010] In a further embodiment, the top end of the valve stem is fixedly connected to a turning handle, the bottom surface of the turning handle is rotatably connected to a limiting clamp through a rotating shaft, the outer surface of the sealing valve cover is fixedly connected to a limiting gear disk, the limiting clamp is clamped with the limiting gear disk, the outer surface of the sealing valve cover is fixedly connected to two limiting columns, and a reset spring is fixedly connected between the turning handle and the limiting clamp.

[0011] In a further embodiment, a nameplate is provided on the front side of the valve body.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The device is provided with a sealing steel ring inside the valve body, and a sealing ring is used to seal between the sealing steel ring and the butterfly plate. In order to avoid a poor seal after the sealing ring between the butterfly plate and the sealing steel ring is worn, two arc strips are provided on the inner wall of the sealing steel ring. The arc strips are designed according to the closing direction of the butterfly plate and will not affect the rotation of the butterfly plate. After the butterfly plate is closed, the butterfly plate and the sealing ring can be in close contact with the sealing gasket on the arc strips, thereby achieving a further sealing effect, and effectively solving the problem that most of the current butterfly valves are sealed between the sealing ring provided on the butterfly plate and the cylinder inside the valve body. When the butterfly valve is opened and closed many times, friction is easily generated between the sealing ring and the valve body, resulting in damage to the sealing ring and affecting the sealing effect of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural diagram of the butterfly valve sealing structure.

[0015] Figure 2 It is a front cross-sectional view of the valve body in the butterfly valve sealing structure.

[0016] Figure 3 It is a side cross-sectional view of the sealing steel ring in the butterfly valve sealing structure.

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the butterfly plate and curved strip plate in the butterfly valve sealing structure.

[0018] In the figure: 1. Valve body; 2. Nameplate; 3. Connecting hole; 4. Connecting plate; 5. Through port; 6. Fixing ear; 7. Sealing valve cover; 8. Limiting column; 9. Valve stem; 10. Limiting gear plate; 11. Rotating shaft; 12. Limiting clamp; 13. Turning handle; 14. Sealing sleeve; 15. Butterfly plate; 16. Sealing ring; 17. Sealing steel ring; 18. Sealing gasket; 19. Curved strip plate; 20. Sealed bearing. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-4 In the utility model, a butterfly valve sealing structure includes a valve body 1, a sealing valve cover 7 is fixedly installed on the top of the valve body 1 by screws, a sealing sleeve 14 is provided inside the valve body 1, a sealing steel ring 17 is provided inside the valve body 1, the inner wall of the sealing steel ring 17 is fixedly inlaid with a sealing bearing 20, a butterfly plate 15 is provided inside the sealing steel ring 17, the interior of the butterfly plate 15 is fixedly connected with a valve stem 9, the bottom end of the valve stem 9 is connected to the inner ring of a sealing bearing 20, the top of the valve stem 9 passes through another sealing bearing 20, the sealing sleeve 14 and the sealing valve cover 7 in sequence and extends to the top of the sealing valve cover 7, the outer surface of the butterfly plate 15 is fixedly connected with a sealing ring 16, the outer surface of the sealing ring 16 contacts the inner wall of the sealing steel ring 17, the inner wall of the sealing steel ring 17 is fixedly connected with two arc-shaped strips 19, and the side surfaces of the two arc-shaped strips 19 close to each other are fixedly connected with a sealing gasket 18.

[0021] The two arc strips 19 are respectively located on both sides of the butterfly plate 15, and the sides of the two sealing gaskets 18 that are close to each other are in contact with the outer surface of the butterfly plate 15 and the outer surface of the sealing ring 16. The arc strips 19 are arranged on both sides of the butterfly plate 15, which will not affect the normal opening of the butterfly plate 15. The left and right ends of the valve body 1 are fixedly connected to the connecting disk 4, and the sides of the two connecting disks 4 that are away from each other are provided with multiple connecting holes 3. The connecting disks 4 on both sides of the valve body 1 can facilitate the installation and fixation of the butterfly valve. The outer surface of the valve body 1 is fixedly connected to the fixing ear 6, and the middle part of the fixing ear 6 is provided with a through opening 5. By arranging the fixing ear 6 at the bottom of the valve body 1, the butterfly valve can be lifted.

[0022] The top of the valve stem 9 is fixedly connected with a turning handle 13, and the bottom surface of the turning handle 13 is rotatably connected to the limit clamp 12 through the rotating shaft 11. The outer surface of the sealing valve cover 7 is fixedly connected to the limit gear disk 10, and the limit clamp 12 is clamped with the limit gear disk 10. The outer surface of the sealing valve cover 7 is fixedly connected with two limit columns 8. A reset spring is fixedly connected between the turning handle 13 and the limit clamp 12. By setting a movable limit clamp 12 on the turning handle 13, holding the limit clamp 12 can disengage the limit clamp 12 from the limit gear disk 10, and releasing the limit clamp 12, the reset spring rebounds and clamps the limit clamp 12 with the limit gear disk 10 to prevent the valve stem 9 from rotating. A nameplate 2 is provided on the front of the valve body 1. By setting the nameplate 2, the specifications of the butterfly valve can be conveniently marked.

[0023] The working principle of this utility model is:

[0024] When in use, the butterfly valve is first connected and fixed to the flange on the pipeline through the connecting plates 4 at both ends of the valve body 1, and the butterfly plate 15 is driven to rotate by the turning handle 13 at the top of the valve stem 9 in cooperation with the valve stem 9. The butterfly plate 15 is sealed in the sealing steel ring 17 by the sealing ring 16. When the butterfly valve is closed, the butterfly plate 15 rotates to seal the valve body 1. During the rotation of the butterfly plate 15, the butterfly plate 15 contacts the two arc-shaped strips 19 on the inner wall of the sealing steel ring 17. The sealing gasket 18 on the arc-shaped strip 19 further seals the butterfly plate 15, thereby ensuring the sealing effect of the butterfly valve.

[0025] It will be apparent 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 characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0026] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A butterfly valve sealing structure, characterized in that: The valve body (1) comprises a valve body (1), the top end of which is fixedly mounted with a sealing valve cover (7) by means of screws, the interior of the valve body (1) is provided with a sealing sleeve (14), the interior of the valve body (1) is provided with a sealing steel ring (17), the inner wall of the sealing steel ring (17) is fixedly inlaid with a sealing bearing (20), the interior of the sealing steel ring (17) is provided with a butterfly plate (15), the interior of the butterfly plate (15) is fixedly connected with a valve stem (9), and the bottom end of the valve stem (9) is connected to the inner ring of a sealing bearing (20). The top end of the valve stem (9) passes through another sealing bearing (20), a sealing sleeve (14) and a sealing valve cover (7) in sequence and extends to the top of the sealing valve cover (7). The outer surface of the butterfly plate (15) is fixedly connected with a sealing ring (16). The outer surface of the sealing ring (16) contacts the inner wall of the sealing steel ring (17). The inner wall of the sealing steel ring (17) is fixedly connected with two arc-shaped strips (19). The side surfaces of the two arc-shaped strips (19) close to each other are fixedly connected with sealing gaskets (18).

2. A butterfly valve sealing structure according to claim 1, characterized in that: The two arc-shaped strips (19) are respectively located on both sides of the butterfly plate (15), and the side surfaces of the two sealing pads (18) close to each other are in contact with the outer surface of the butterfly plate (15) and the outer surface of the sealing ring (16).

3. A butterfly valve sealing structure according to claim 1, characterized in that: The left and right ends of the valve body (1) are both fixedly connected to connection plates (4), and a plurality of connection holes (3) are provided on the side surfaces of the two connection plates (4) that are away from each other.

4. A butterfly valve sealing structure according to claim 1, characterized in that: A fixing ear (6) is fixedly connected to the outer surface of the valve body (1), and a through opening (5) is opened in the middle of the fixing ear (6).

5. A butterfly valve sealing structure according to claim 1, characterized in that: The top end of the valve stem (9) is fixedly connected to a turning handle (13), the bottom surface of the turning handle (13) is rotatably connected to a limiting clamp (12) via a rotating shaft (11), the outer surface of the sealing valve cover (7) is fixedly connected to a limiting toothed disk (10), the limiting clamp (12) is clamped with the limiting toothed disk (10), the outer surface of the sealing valve cover (7) is fixedly connected to two limiting columns (8), and a reset spring is fixedly connected between the turning handle (13) and the limiting clamp (12).

6. A butterfly valve sealing structure according to claim 1, characterized in that: A nameplate (2) is provided on the front side of the valve body (1).

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