CN218818217U

CN218818217U - Sealing performance enhanced butterfly valve

Info

Publication number: CN218818217U
Application number: CN202223075784.3U
Authority: CN
Inventors: 张启亮
Original assignee: Tianjin Ruist Fluid Technology Co ltd
Current assignee: Tianjin Ruist Fluid Technology Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-04-07
Anticipated expiration: 2032-11-21

Abstract

The utility model discloses a sealing performance enhancement mode butterfly valve, including valve body, disk seat and valve plate, the disk seat arrange in the internal surface of valve body, the valve plate is installed in the disk seat inboardly, with the disk seat cooperation can compress tightly and realize that peripheral is sealed, the valve plate is connected with the valve shaft, realizes opening or closing by the valve shaft drive, the disk seat is the rubber disk seat, the internal face of valve body corresponds the position in the valve shaft hole of disk seat is through recessed ring channel that forms one with the axle center, an elastic support ring is arranged to the ring channel, the valve shaft passes the valve shaft hole of valve body the elastic support ring the valve shaft hole of disk seat with the valve shaft jogged joint of valve plate. Through the setting of support ring, it is even to enable end footpath department rubber thickness, and it is even that rubber receives the extrusion force of valve plate, makes the sealing performance of valve have more the security.

Description

Sealing performance enhanced butterfly valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to a sealing performance enhancement mode butterfly valve.

Background

Butterfly valves are generally applied to chemical engineering, pharmacy, coal gas, liquefied petroleum, sewage treatment and other projects, most of media contacted with the butterfly valves are acid and alkali corrosive liquids (or gases), the working environment is relatively severe, and the danger is relatively high. The sealing of the valve plate and the valve seat of the butterfly valve in the prior art adopts an interference fit method to achieve the sealing effect. The extrusion type sealing principle is easy to cause in design: firstly, the interference fit is small, and the sealing effect is poor; secondly, the interference fit is large, the torque of the valve is increased, the damage to the valve shaft is easily caused, and the power of the driving device is increased; thirdly, the butterfly valve is easy to leak internally or externally after being used for a period of time, once leakage occurs, environmental pollution, equipment damage and casualty accidents are caused; fourthly, the general pressure resistance of the existing butterfly valve is PN10, the small specification reaches PN16, and the large specification is only PN3-6. And the torque is relatively large, the application range of the anti-corrosion butterfly valve is severely restricted, and the purchasing cost is greatly increased when the system pressure is high and a user has to select a ball valve or a stop valve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sealing performance enhancement mode butterfly valve to the technical defect who exists among the prior art.

For realizing the utility model discloses a technical scheme that the purpose adopted is:

the utility model provides a sealing performance enhancement mode butterfly valve, includes the valve body, disk seat and valve plate, the disk seat arrange in the internal surface of valve body, the valve plate is installed in the disk seat inboard, with the disk seat cooperation can compress tightly and realize that peripheral is sealed, the valve plate is connected with the valve shaft, realizes opening or closing by the valve shaft drive, the disk seat is the rubber disk seat, the internal face of valve body corresponds the position in the valve shaft hole of disk seat forms an annular channel with the axle center through recessed, an elastic support ring is arranged to the annular channel, the valve shaft passes the valve shaft hole of valve body the elastic support ring the valve shaft hole of disk seat with the valve shaft jogged joint of valve plate.

Wherein, the elastic support ring is a rubber support ring.

The valve shaft at the near end is in running fit with the valve shaft sleeve and the sealing ring which are made of high polymer materials and arranged in the valve shaft matching part of the valve body.

The outer end of the valve shaft at the far end is in threaded connection with a T-shaped seal head, the inner side of the T-shaped seal head is connected with the valve shaft matching part of the valve body through an O-shaped sealing ring, and the valve shaft at the far end is in running fit with the sealing ring in the valve shaft matching part of the valve body and the valve shaft sleeve made of high polymer materials.

The shaft head of the valve shaft at the near end is exposed out of the valve body, a V-shaped sealing ring is arranged between the shaft head and the position close to the upper end of the valve shaft matching part of the valve body, a sealing group ring is arranged at the upper end of the V-shaped sealing ring, a gland is arranged at the upper end of the sealing group ring, a U-shaped clamp is arranged at the upper end of the gland, and the U-shaped clamp is connected with the end face of the valve shaft matching part of the valve body through screws.

The utility model discloses sealing performance enhancement mode butterfly valve corresponds through the internal face at the valve body the position in the valve shaft hole of disk seat forms a ring channel with the axle center through recessed, an elastic support ring is arranged to the ring channel, the valve shaft passes the valve shaft hole of valve body the elastic support ring the valve shaft hole of disk seat with the valve shaft jogged joint of valve plate enables the end footpath department rubber thickness even, and the extrusion force that rubber received the valve plate is even, makes the sealing performance of valve have more the security.

Drawings

Fig. 1 is a schematic structural diagram of the sealing performance enhanced butterfly valve of the present invention.

Fig. 2 is a schematic structural diagram (without valve plate) of the sealing performance enhanced butterfly valve of the present invention.

Fig. 3 is a schematic view of the sealing performance enhanced butterfly valve of the present invention.

Fig. 4 is a schematic cross-sectional view of the sealing performance enhanced butterfly valve of the present invention.

Fig. 5 is a schematic view of the cross-sectional structure of the butterfly valve with enhanced sealing performance along the rotation line of the present invention.

Fig. 6 is an enlarged partial schematic view of fig. 5.

Fig. 7 is another partially enlarged schematic view of fig. 5.

Fig. 8 is a schematic view of the connection between the valve body and the valve shaft of the sealing performance enhanced butterfly valve of the present invention.

Fig. 9 is a partial enlarged view of the upper portion of fig. 8.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 to 9, a butterfly valve with enhanced sealing performance comprises a valve body 1, a valve seat 2 and a valve plate 3, wherein a plurality of flange connecting lugs are arranged on the outer peripheral surface of the valve body 1, bolt holes 4 are formed in the flange connecting lugs, the flange connecting lugs are conveniently connected with flanges of pipe ends of a pipeline through bolts, the shapes of the flange connecting lugs are uniformly distributed, the valve seat is arranged on the inner surface of the valve body, the valve plate is mounted on the inner side of the valve seat and can be compressed to realize peripheral sealing through matching with the valve seat, the valve plate is connected with the valve shaft and driven by the valve shaft to be opened or closed, the valve shaft comprises a valve shaft 5 at the near end and a valve shaft 7 at the far end and is respectively connected with valve shaft holes at the two ends of the valve plate, the valve seat is a rubber valve seat, an annular groove with the same axis is formed in the position of a valve shaft hole of the valve seat through sinking, a circular space is formed between the valve body and the valve seat, an elastic support ring 14 is arranged on the valve shaft, namely, the valve shaft is pressed in the circular space, and the valve shaft passes through the valve shaft hole of the valve body, the elastic support ring and the valve shaft hole of the valve seat is connected with the valve plate.

As a preferred example or embodiment, the elastic support ring 14 is a rubber support ring.

As a preferred embodiment or implementation manner, the valve shaft at the proximal end is rotationally matched with the polymeric valve shaft bushing 13 and the sealing ring 15 in the valve shaft matching portion of the valve body, the polymeric valve shaft bushing 13 may be multiple segments, the sealing ring 15 is an O-shaped sealing ring, and is disposed between the two upper segments of the polymeric valve shaft bushings 13, as shown in fig. 8, the other segment of the polymeric valve shaft bushing 13 is pressed on the supporting ring 14 and is spaced from the other two segments of the polymeric valve shaft bushings 13.

As a preferred embodiment or implementation manner, a T-shaped seal head 6 is disposed at the outer end of the valve shaft at the far end in a threaded connection manner, and is in threaded connection with the valve body, the inner side of the T-shaped seal head is in sealing fit with the valve shaft matching portion of the valve body through an O-shaped seal ring 15, the valve shaft at the far end is in rotating fit with the seal ring 15 in the valve shaft matching portion of the valve body and the valve shaft bushing 13 made of polymer material, the valve shaft bushing 13 made of polymer material is in two sections, and the seal ring 1 separates the two sections of valve shaft bushings 13 made of polymer material, as shown in fig. 8. Through the arrangement, the valve shaft at the far end is mounted in a sealing mode, and a good sealing structure is formed.

The shaft head of the valve shaft 5 at the near end is exposed out of the valve body, particularly the shaft head of the connecting flange 8 at the near end of the valve body is extended out of the top end surface, a V-shaped sealing ring 12 is arranged between the shaft head and the position close to the upper end of the valve shaft matching part of the valve body, a sealing group ring 16 is arranged at the upper end of the V-shaped sealing ring, a gland 11 is arranged at the upper end of the sealing group ring, a U-shaped clamp 9 is arranged at the upper end of the gland, the U-shaped clamp is connected with the end surface of the valve shaft matching part of the valve body through a screw 10, and through the arrangement, the sealing installation of the valve shaft at the near end is realized, and a good sealing structure is formed.

Particularly, the supporting ring 14 between the valve seat and the valve body is arranged, so that the thickness of rubber at the end diameter is uniform, the extrusion force of the rubber on the valve plate is uniform, and the sealing performance of the valve is guaranteed.

Having shown and described the basic principles and principal features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof;

the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. Sealing performance enhancement mode butterfly valve, including the valve body, disk seat and valve plate, the disk seat arrange in the internal surface of valve body, the valve plate is installed in the disk seat inboard, with the disk seat cooperation can compress tightly and realize peripheral sealing, the valve plate is connected with the valve shaft, realizes opening or closing by the valve shaft drive, its characterized in that, the disk seat is the rubber disk seat, the internal face of valve body corresponds the position in the valve shaft hole of disk seat forms an annular channel with the axle center through recessed, an elastic support ring is arranged to the annular channel, the valve shaft passes the valve shaft hole of valve body the elastic support ring the valve shaft hole of disk seat with the valve shaft jogged joint of valve plate.

2. The butterfly valve with enhanced sealing performance of claim 1, wherein said resilient support ring is a rubber support ring.

3. The butterfly valve with enhanced sealing performance as claimed in claim 1, wherein the valve shaft at the proximal end is rotatably engaged with a shaft sleeve and a sealing ring of a polymer material in the valve shaft engaging portion of the valve body.

4. The butterfly valve with enhanced sealing performance as claimed in claim 1, wherein the outer end of the valve shaft at the far end is screwed with a T-shaped seal head, the inner side of the T-shaped seal head is connected with the valve shaft matching part of the valve body through an O-shaped sealing ring, and the valve shaft at the far end is rotatably matched with the sealing ring in the valve shaft matching part of the valve body and the valve shaft sleeve made of polymer material.

5. The butterfly valve with the enhanced sealing performance according to claim 1, wherein a shaft head of the valve shaft at the near end is exposed out of the valve body, a V-shaped sealing ring is arranged between the shaft head and a position near the upper end of a matching part of the valve shaft and the valve body, a sealing ring set is arranged at the upper end of the V-shaped sealing ring, a gland is arranged at the upper end of the sealing ring set, a U-shaped clamp is arranged at the upper end of the gland, and the U-shaped clamp is connected with an end face of the matching part of the valve shaft of the valve body through a screw.