Valve seat structure of butterfly valve

Abstract

The utility model discloses a valve seat structure of a butterfly valve, which belongs to the technical field of butterfly valves and comprises an annular framework component and a rubber sealing ring, the framework component is arranged in the rubber sealing ring and comprises at least two framework parts, the framework parts are connected through horizontal connecting parts, each framework part comprises a plurality of connected snakelike framework sections, and the snakelike framework sections are connected through horizontal connecting parts. The edge of the snakelike framework section is provided with a bend used for enhancing the strength of the rubber sealing ring. The framework assembly is embedded into the rubber sealing ring, the framework assembly at least comprises two framework pieces, each framework piece comprises a snakelike framework section and a bend arranged on the edge of the snakelike framework section, and the strength of the rubber edge can be better supported; the framework pieces are welded through the horizontal connecting parts. The performance of the rubber part is optimized, so that the rubber part is suitable for different environments and applications.

Description

Technical Field

[0001] The utility model belongs to the technical field of butterfly valves, and in particular relates to a valve seat structure of a butterfly valve. Background Art

[0002] At present, the existing centerline wafer butterfly valve seats generally have the following structures: First, a rubber valve seat with a hard skeleton, the sealing surfaces at both ends of the valve seat are narrow bands, requiring that the installed flange cannot use a flat-welded flange, and the inner diameter of the flange is very strict. Second, a wide-band rubber sealing valve seat without a hard skeleton. This structure can use a flat-welded flange, and the inner diameter of the flange is not strict, but there are fatal shortcomings that the rubber valve seat is easily deformed and the valve seat is locked to the valve plate. Third, a wide-edge rubber sealing valve seat directly vulcanized onto the valve body. Although this structure avoids the shortcomings of the first and second valve seats, it has the disadvantages of high manufacturing cost and cannot be repaired or replaced. Once the valve seat is damaged, the valve seat and the valve body can only be burned as a whole or processed by processing, and then re-manufactured, and the cost is higher than replacing a new valve.

[0003] A Chinese patent with publication number CN211820779U and publication date 2020-10-30 discloses a valve seat, including an annular hard skeleton and a rubber sealing ring, wherein the hard skeleton is arranged outside the sealing ring, the side wall of the sealing ring is symmetrically provided with an axial hole that matches the valve stem, and the side wall of the hard skeleton is correspondingly provided with a mounting hole, the center lines of the axial hole and the mounting hole coincide and are perpendicular to the center lines of the sealing ring and the hard skeleton; the cross section of the sealing ring is U-shaped, the hard skeleton is placed in the U-shaped groove of the sealing ring, and the annular convex ridges at both ends of the sealing ring extend to the outside of the end face of the hard skeleton. In this patent, a hard skeleton is arranged outside the sealing ring, a sealing ring with a U-shaped cross section is used, and the hard skeleton is placed in the U-shaped groove of the sealing ring, so that the annular convex ridges at both ends of the sealing ring can extend to the outside of the end face of the hard skeleton, which solves the defect that the valve seat is easily deformed and locked to the valve plate; however, the edge strength of the rubber sealing ring is low, and the adaptability of the valve seat is poor. Utility Model Content

[0004] The purpose of the utility model is to solve the problems of the prior art and provide a valve seat structure of a butterfly valve, wherein a skeleton component is embedded in a rubber sealing ring, wherein the skeleton component comprises at least two skeleton members, wherein a serpentine skeleton segment and a bend arranged at the edge of the serpentine skeleton segment in the skeleton member can better support the strength of the rubber edge; and the skeleton members are welded through a horizontal connecting portion. The utility model optimizes the performance of the rubber part so that it is suitable for different environments and applications.

[0005] The utility model is realized by the following technical solutions:

[0006] A valve seat structure of a butterfly valve includes an annular skeleton component and a rubber sealing ring. The skeleton component is arranged inside the rubber sealing ring. The skeleton component includes at least two skeleton members, which are connected by a horizontal connecting part. The skeleton member includes a plurality of connected serpentine skeleton segments. The edges of the serpentine skeleton segments are provided with bends for strengthening the strength of the rubber sealing ring.

[0007] Preferably, the angle of the bend is 100-110°.

[0008] Preferably, the side wall of the rubber sealing ring is symmetrically provided with an axial hole that cooperates with the valve stem.

[0009] Preferably, there are four metal frame fixing pin holes on the frame assembly at the shaft hole.

[0010] Preferably, the metal frame fixing pin holes are arranged on the serpentine frame segments.

[0011] Preferably, the rubber sealing ring is provided with a groove matching the valve body.

[0012] Preferably, the cross-section of the rubber sealing ring is U-shaped.

[0013] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0014] 1. The utility model provides a valve seat structure of a butterfly valve, in which a skeleton component is embedded in a rubber sealing ring, and the skeleton component includes at least two skeleton members, wherein the serpentine skeleton segment and the bend set at the edge of the serpentine skeleton segment in the skeleton member can better support the strength of the rubber edge; the skeleton members are welded through a horizontal connecting portion. The utility model optimizes the performance of rubber parts to make them suitable for different environments and applications.

[0015] Second, the valve seat structure of a butterfly valve provided by the utility model has the advantages of good elasticity, durability and sealing. Good elasticity: The rubber sealing ring has good elasticity, can absorb impact and reduce vibration. Durability: It has good resistance to temperature, humidity and chemicals. Sealing: The rubber sealing ring can effectively prevent liquid and other substances from penetrating into the interior. Protection function: The rubber sealing ring protects the internal structure from the influence of the external environment. Shock absorption and buffering: It can reduce the vibration and noise generated when the machine is running.

[0016] 3. The utility model provides a butterfly valve seat structure, the skeleton component has the advantages of enhanced stability and uniform distribution; Enhanced stability: the metal material increases the rigidity and stability of the entire part; Uniform distribution: the skeleton component ensures that the entire part is evenly stressed and reduces local wear. Extended life: the skeleton component improves the durability of the entire part. Support function: it supports the rubber seal ring to prevent it from deformation.

[0017] 4. The valve seat structure of a butterfly valve provided by the utility model has two shaft holes, which penetrate the rubber sealing ring; metal frame fixing pin holes: there are 4 metal frame fixing pin holes near the shaft hole to prevent the frame assembly from shifting during the rubber sealing ring manufacturing process. The connection position of the frame member is located around the shaft hole and is connected by spot welding. At the same time, in order to ensure the stability of the position of the frame assembly in the rubber sealing ring and to prevent position shifting, 4 pin holes are specially provided on each side for positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0019] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;

[0020] Figure 3 It is a structural schematic diagram of the central axis hole of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the skeleton assembly in the utility model;

[0022] Figure 5 It is a schematic diagram of the use of the utility model;

[0023] Figure 6 for Figure 5 The enlarged view of point A in the middle;

[0024] Among them: 100, skeleton assembly; 110, skeleton member; 111, serpentine skeleton segment; 112, bend; 113, metal skeleton fixing pin hole; 120, horizontal connecting part; 200, rubber sealing ring; 210, shaft hole; 220, groove; 300, valve stem; 400, valve body. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the embodiments, but the implementation manner of the present invention is not limited thereto.

[0026] Example 1

[0027] like Figure 1-Figure 6 As shown, this embodiment provides a valve seat structure of a butterfly valve, including an annular skeleton component 100 and a rubber sealing ring 200, wherein the skeleton component 100 is arranged inside the rubber sealing ring 200, and the skeleton component 100 includes at least two skeleton members 110, and the skeleton members 110 are connected by a horizontal connecting portion 120, and the skeleton member 110 includes a plurality of connected serpentine skeleton segments 111, and the edges of the serpentine skeleton segments 111 are provided with bends 112 for strengthening the strength of the rubber sealing ring 200.

[0028] The frame assembly 100 is embedded in the rubber sealing ring 200. The frame assembly 100 includes at least two frame members 110. The serpentine frame segment 111 and the bend 112 arranged at the edge of the serpentine frame segment 111 in the frame member 110 can better support the strength of the rubber edge. The frame members 110 are welded through the horizontal connecting part 120. The utility model optimizes the performance of the rubber parts so that they are suitable for different environments and applications.

[0029] Example 2

[0030] The difference between this embodiment and the first embodiment is that the angle of the bend 112 is 100-110°.

[0031] The side wall of the rubber sealing ring 200 is symmetrically provided with an axial hole 210 that matches the valve stem 300 .

[0032] There are four metal frame fixing pin holes 113 on the frame assembly 100 at the shaft hole 210 .

[0033] The metal frame fixing pin hole 113 is arranged on the serpentine frame segment 111 .

[0034] The rubber sealing ring 200 is provided with a groove 220 matching the valve body 400 .

[0035] The cross section of the rubber sealing ring 200 is U-shaped.

[0036] The rubber seal 200 has the advantages of good elasticity, durability and sealing. Good elasticity: The rubber seal 200 has good elasticity, can absorb impact and reduce vibration. Durability: It has good resistance to temperature, humidity and chemicals. Sealing: The rubber seal 200 can effectively prevent liquid and other substances from penetrating into the interior. Protection function: The rubber seal 200 protects the internal structure from the influence of the external environment. Shock absorption and buffering: It can reduce the vibration and noise generated when the machine is running.

[0037] The skeleton assembly 100 has advantages such as enhanced stability and uniform distribution; Enhanced stability: The metal material increases the rigidity and stability of the entire part; Uniform distribution: The skeleton assembly 100 ensures that the entire part is evenly stressed and reduces local wear. Extended life: The skeleton assembly 100 improves the durability of the entire part. Supporting function: It supports the rubber seal ring 200 to prevent it from deforming.

[0038] There are two shaft holes 210, which penetrate the rubber seal ring 200; metal frame fixing pin holes 113: There are 4 metal frame fixing pin holes 113 near the shaft hole 210 to prevent the frame assembly 100 from shifting during the manufacturing process of the rubber seal ring 200. The connection position of the frame member 110 is located around the shaft hole 210, and is connected by spot welding. At the same time, in order to ensure the stability of the position of the frame assembly 100 in the rubber seal ring 200 and to prevent position shifting, 4 pin holes are specially set on each side for positioning.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A valve seat structure of a butterfly valve, comprising an annular skeleton component (100) and a rubber sealing ring (200), wherein the skeleton component (100) is arranged inside the rubber sealing ring (200), and characterized in that: The skeleton assembly (100) comprises at least two skeleton members (110), the skeleton members (110) being connected via a horizontal connecting portion (120), the skeleton members (110) comprising a plurality of connected serpentine skeleton segments (111), the edges of the serpentine skeleton segments (111) being provided with bends (112) for enhancing the strength of the rubber sealing ring (200).

2. The valve seat structure of a butterfly valve according to claim 1, characterized in that: The angle of the bend (112) is 100-110°.

3. The valve seat structure of a butterfly valve according to claim 1, characterized in that: The side wall of the rubber sealing ring (200) is symmetrically provided with an axial hole (210) that matches the valve stem (300).

4. The valve seat structure of a butterfly valve according to claim 3, characterized in that: There are four metal frame fixing pin holes (113) on the frame assembly (100) at the shaft hole (210).

5. The valve seat structure of a butterfly valve according to claim 4, characterized in that: The metal frame fixing pin hole (113) is arranged on the serpentine frame segment (111).

6. The valve seat structure of a butterfly valve according to claim 1, characterized in that: The rubber sealing ring (200) is provided with a groove (220) matching the valve body (400).

7. The valve seat structure of a butterfly valve according to claim 1, characterized in that: The cross section of the rubber sealing ring (200) is U-shaped.

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