Pneumatic flange butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, and specifically to a pneumatic flange butterfly valve. The utility model provides a pneumatic flange butterfly valve, comprising: a flange, a drive assembly, a rotating shaft and a butterfly plate; wherein the drive assembly is fixedly connected to the top of the flange, one end of the rotating shaft is fixedly connected to the drive assembly, and the other end passes through the top of the flange and extends to the bottom of the flange, and the butterfly plate is fixed on the rotating shaft part inside the flange; and the rotating shaft and the flange are rotatably connected, and the diameter of the butterfly plate matches the inner wall diameter of the flange; wherein a cover seam structure is provided at the connection position of the rotating shaft and the flange; the utility model achieves a sealing effect on the connection gap between the rotating shaft and the flange by providing the cover seam structure, avoids liquid from entering the gap and causing wear or corrosion at the rotating position of the rotating shaft, and achieves the effect of delaying the aging speed of the butterfly valve at low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a pneumatic flange butterfly valve. Background Art

[0002] The existing flange butterfly valve is relatively common, such as the patent number 202322328307.1, which is an easy-to-disassemble pneumatic flange butterfly valve. For details, please refer to Figure 1 ,like Figure 1 As shown, a pneumatic flange butterfly valve comprises a flange 1 and a drive shaft 101, wherein the drive shaft 101 is fixedly mounted on the outer surface of the flange 1, a disassembly assembly 2 is arranged at one end of the drive shaft 101, and the disassembly assembly 2 comprises a connecting sleeve arranged on the outer surface of the drive shaft 101, a pneumatic assembly 205 is fixedly connected to one end of the connecting sleeve, a buffer spring 206 is fixedly connected to the inner wall of the groove 204, a protective plate 207 is fixedly connected to one end of the buffer spring 206, a butterfly plate 208 is arranged on the inner wall of the flange 1, and a sealing assembly 3 is arranged on the outer surface of the flange 1. In the above technology, the top and bottom of the butterfly plate 208 are rotatably connected to the inner wall of the flange 1 through a rotating rod, liquid and impurities are easily entered into the connecting gap, and wear and corrosion are prone to occur over a long period of time.

[0003] Therefore, how to solve the problem that the gap between the drive shaft and the flange 1 is susceptible to corrosion is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0004] The utility model provides a pneumatic flange butterfly valve to solve the above technical problems.

[0005] In order to achieve the above-mentioned purpose, an embodiment of the utility model provides a pneumatic flange butterfly valve, comprising: a flange, a drive assembly, a rotating shaft and a butterfly plate; wherein the drive assembly is fixedly connected to the top of the flange, one end of the rotating shaft is fixedly connected to the drive assembly, and the other end passes through the top of the flange and extends to the bottom of the flange, and the butterfly plate is fixed on the rotating shaft part inside the flange; and the rotating shaft and the flange are rotatably connected, and the diameter of the butterfly plate coincides with the inner wall diameter of the flange; wherein a cover seam structure is provided at the connection position between the rotating shaft and the flange.

[0006] Furthermore, the inner wall and both sides of the flange are covered with a rubber sheet structure.

[0007] Furthermore, annular grooves are provided at the top and bottom of the inner wall of the flange; wherein a portion of the cover seam structure extends into the annular grooves.

[0008] Furthermore, the cover seam structure includes an external leakage ring; wherein the external leakage ring is fixed on the rotating shaft.

[0009] Furthermore, the external leakage ring includes a pressing platform and a fixed platform corresponding to the pressing platform; wherein the fixed platform is installed on the side wall of the rotating shaft; and the pressing platform is arranged on the edge of the fixed platform; wherein the bottom surface of the pressing platform is against the inner wall of the flange.

[0010] Furthermore, a built-in ring is provided at the bottom of the connection position between the pressing table and the fixing table; wherein the built-in ring extends into the ring groove. Furthermore, a guide portion is provided at the bottom of the built-in ring; wherein

[0011] The bottom surface of the guide portion abuts against the bottom surface of the annular groove.

[0012] Furthermore, the vertical cross-section of the guide portion is a 1 / 2 arc.

[0013] Furthermore, the thickness of the external leakage ring gradually decreases from the pressing platform toward the fixing platform.

[0014] Furthermore, the bottom surface of the guide portion is provided with a wear-resistant coating.

[0015] Compared with the prior art, the utility model realizes the sealing effect of the gap between the rotating shaft and the flange by setting a cover seam structure, thereby preventing liquid from entering the gap and causing wear or corrosion at the rotating position of the rotating shaft, and effectively delaying the aging speed of the butterfly valve; by structuring the rubber sheet into a multi-layer composite material, the deformation degree of the extruded rubber sheet can change with the hollow position of the grid, so that the contact surface is in an undulating state of an arc surface, further improving the sealing effect of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a structural schematic diagram of a flange butterfly valve in the prior art;

[0018] Figure 2 A three-dimensional diagram of the optimal embodiment of the pneumatic flange butterfly valve of the utility model;

[0019] Figure 3 It is a three-dimensional cross-sectional view of the optimal embodiment of the pneumatic flange butterfly valve of the utility model;

[0020] Figure 4 For this utility model Figure 3 The enlarged structural diagram at A in the middle;

[0021] Figure 5 It is a three-dimensional cross-sectional view of the optimal embodiment of the cover seam structure of the utility model.

[0022] Among them, 1. flange; 2. drive assembly; 3. butterfly plate; 4. rotating shaft; 5. cover seam structure; 51. external leakage ring; 52. internal ring; 53. guide part; 54. pressing table; 55. fixing table; 6. ring groove. DETAILED DESCRIPTION

[0023] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0024] See also Figures 2 to 3 , Figure 2 A three-dimensional diagram of the optimal embodiment of the pneumatic flange butterfly valve of the utility model; Figure 3 This is a three-dimensional cross-sectional view of the optimal embodiment of the pneumatic flange butterfly valve of the utility model. Figures 2 to 3 As shown, at least one embodiment provides a pneumatic flange butterfly valve, including: a flange 1, a drive assembly 2, a rotating shaft 4 and a butterfly plate 3; the inner wall and both sides of the flange 1 are covered with a rubber sheet structure, the butterfly plate 3 and the rubber sheet structure are squeezed to achieve a sealing effect, the rotating shaft 4 is used to flip the butterfly plate 3 to achieve the opening and closing effect of the butterfly valve, and the drive assembly 2 is a pneumatic structure used to rotate the rotating shaft 4. The drive assembly 2 is fixedly connected to the top of the flange 1, one end of the rotating shaft 4 is fixedly connected to the drive assembly 2, and the other end passes through the top of the flange 1 and extends to the bottom of the flange 1, and the butterfly plate 3 is fixed on the rotating shaft 4 inside the flange 1; and the rotating shaft 4 and the flange 1 are rotatably connected, and the diameter of the butterfly plate 3 coincides with the inner wall diameter of the flange 1; in order to prevent the rotating shaft 4 from extending into the gap at the inner wall of the flange 1 and entering the liquid, a cover seam structure 5 is provided at the connection position between the rotating shaft 4 and the flange 1.

[0025] Please continue reading Figure 3 Combined with Figures 4 to 5 , Figure 4 For this utility model Figure 3 The enlarged structural diagram at A in the middle; Figure 5 This is a three-dimensional cross-sectional view of the optimal embodiment of the cover seam structure of the utility model. Figures 3 to 5As shown, the top and bottom of the inner wall of the flange 1 are provided with annular grooves 6; wherein a portion of the cover seam structure 5 extends into the annular groove 6. The composition structure of the cover seam structure 5 is described in detail below. The cover seam structure 5 is made of metal as a whole. The cover seam structure 5 can rotate with the rotating shaft 4, and at the same time, it will generate a certain extrusion force on the rubber sheet structure. The cover seam structure 5 includes an external leakage ring 51; wherein the external leakage ring 51 is fixed on the rotating shaft 4. The external leakage ring 51 includes a pressing table 54 and a fixed table 55 corresponding to the pressing table 54; the edge of the pressing table 54 is provided with an arc chamfer, so that when the rubber sheet structure contacts it, the rotation process is smoother, wherein the fixed table 55 is installed on the side wall of the rotating shaft 4; and the pressing table 54 is provided on the edge of the fixed table 55; wherein the bottom surface of the pressing table 54 is against the inner wall of the flange 1. An internal ring 52 is provided at the bottom of the connection position between the pressing table 54 and the fixed table 55; wherein the internal ring 52 extends into the annular groove 6. A guide portion 53 is provided at the bottom of the inner ring 52; a wear-resistant coating is provided on the bottom surface of the guide portion 53. The bottom surface of the guide portion 53 abuts against the bottom surface of the annular groove 6. The vertical section of the guide portion 53 is a 1 / 2 arc. The thickness of the outer leakage ring 51 gradually decreases from the pressure surface stage 54 to the fixed stage 55, in order to prevent liquid from being retained around the rotating gap of the rotating shaft 4.

[0026] As a preferred solution, the rubber sheet structure is a multi-layer composite material, specifically a rubber sheet, a mesh metal sheet and a sandwich design of a rubber sheet. Two layers of rubber sheets are coated on the mesh metal sheet, so that when the edge of the butterfly valve and the surface of the rubber sheet structure are against each other, the degree of deformation of the extruded rubber sheet can change with the position of the mesh hollowing, so that the contact surface is in an undulating state of an arc surface, further improving the sealing effect of the butterfly valve.

[0027] In summary, by providing the gap cover structure 5, a sealing effect is achieved on the gap between the rotating shaft 4 and the flange 1, preventing liquid from entering the gap and causing the rotating position of the rotating shaft 4 to be worn or corroded, thereby effectively delaying the aging speed of the butterfly valve.

[0028] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A pneumatic flange butterfly valve, characterized in that: include: A flange (1), a driving assembly (2), a rotating shaft (4) and a butterfly plate (3); wherein The driving assembly (2) is fixedly connected to the top of the flange (1), one end of the rotating shaft (4) is fixedly connected to the driving assembly (2), and the other end passes through the top of the flange (1) and extends to the bottom of the flange (1), and the butterfly plate (3) is fixed to the rotating shaft (4) inside the flange (1); and The rotating shaft (4) and the flange (1) are rotatably connected, and the diameter of the butterfly plate (3) matches the inner wall diameter of the flange (1); in A cover seam structure (5) is provided at the connection position between the rotating shaft (4) and the flange (1).

2. The pneumatic flange butterfly valve according to claim 1, characterized in that: The inner wall and both sides of the flange (1) are covered with a rubber sheet structure.

3. The pneumatic flange butterfly valve according to claim 1, characterized in that: The top and bottom of the inner wall of the flange (1) are provided with annular grooves (6); Part of the cover seam structure (5) extends into the annular groove (6).

4. The pneumatic flange butterfly valve according to claim 3, characterized in that: The seam cover structure (5) comprises an external leakage ring (51); wherein The outer leakage ring (51) is fixed on the rotating shaft (4).

5. The pneumatic flange butterfly valve according to claim 4, characterized in that: The external leakage ring (51) comprises a pressing platform (54) and a fixing platform (55) corresponding to the pressing platform (54); wherein The fixing platform (55) is mounted on the side wall of the rotating shaft (4); and The pressing platform (54) is arranged on the edge of the fixing platform (55); wherein The bottom surface of the pressing platform (54) abuts against the inner wall of the flange (1).

6. The pneumatic flange butterfly valve according to claim 5, characterized in that: A built-in ring (52) is provided at the bottom of the connection position between the pressing platform (54) and the fixing platform (55); wherein The built-in ring (52) extends into the annular groove (6).

7. The pneumatic flange butterfly valve according to claim 6, characterized in that: A guide portion (53) is provided at the bottom of the built-in ring (52); wherein The bottom surface of the guide portion (53) abuts against the bottom surface of the annular groove (6).

8. The pneumatic flange butterfly valve according to claim 7, characterized in that: The vertical cross section of the guide portion (53) is a 1 / 2 arc.

9. The pneumatic flange butterfly valve according to claim 8, characterized in that: The thickness of the external leakage ring (51) gradually decreases from the pressing platform (54) toward the fixing platform (55).

10. The pneumatic flange butterfly valve according to claim 9, characterized in that: The bottom surface of the guide portion (53) is provided with a wear-resistant coating.

Images