CN210088025U

CN210088025U - Valve seat sealing structure of rubber-lined butterfly valve

Info

Publication number: CN210088025U
Application number: CN201920460229.1U
Authority: CN
Inventors: 曹娟娟; 钱凯峰; 陈森林
Original assignee: Jiangsu Shentong Valve Co Ltd
Current assignee: Jiangsu Shentong Valve Co Ltd
Priority date: 2019-04-08
Filing date: 2019-04-08
Publication date: 2020-02-18
Anticipated expiration: 2029-04-08

Abstract

The utility model provides a lining rubber butterfly valve' S disk seat seal structure, including disk seat and butterfly plate, be equipped with S type sealing strip on the disk seat, S type sealing strip includes the main seal strip, sealing washer and auxiliary seal strip, the main seal strip forms sealed vice with the side reason of butterfly plate, the sealing washer contacts with the butterfly plate axle bed, the sealing washer is globular indent shape, the butterfly plate axle bed is globular evagination, the sealing washer is inosculated each other with the butterfly plate axle bed and is sealed the laminating, the juncture of butterfly plate axle bed and the side reason of butterfly plate is the transition portion of butterfly plate, the sealed laminating of auxiliary seal strip and transition portion. The utility model has the advantages that: the S-shaped sealing strip is adopted, the main sealing strip compresses the sealing surface in a surface contact mode, the abrasion of the sealing surface is reduced, and the service life of the rubber-lined valve seat is prolonged; the sealing ring of the valve shaft insertion part is spherical and convex, so that the height of the valve seat protrusion can be reduced, and the driving torque can be reduced; the auxiliary sealing strip ensures the sealing performance of the transition part on one hand, and reduces the driving torque compared with the existing large-area pressing contact on the other hand.

Description

Valve seat sealing structure of rubber-lined butterfly valve

Technical Field

The utility model relates to a lining rubber butterfly valve, in particular to its disk seat structure.

Background

As shown in fig. 1, the butterfly plate starts to rotate under the action of the driving device until the butterfly plate 2 presses the sealing surface of the valve seat 1 to realize sealing, the whole circle of the bulge part of the valve seat is extruded by the outer ring of the whole butterfly plate, but the valve seat is abraded due to long-term opening and closing, the sealing quality is influenced, the service life of the valve seat is shortened, and the driving torque is far greater than the torque required in the opening and closing process when the valve is opened or closed; in addition, the sealing surfaces of the valve seat and the butterfly plate at the insertion part of the valve shaft are processed into a plane type, and the interference magnitude is larger at the position for ensuring the sealing of the connection part; moreover, when there is impurity in the medium, it is easy to cause the valve seat and the butterfly plate to block.

SUMMERY OF THE UTILITY MODEL

In order to overcome the shortcoming of current lining with rubber butterfly valve disk seat seal structure, the utility model provides a disk seat seal structure that leakproofness is good.

The utility model provides a technical scheme that its technical problem adopted is, a disk seat seal structure of rubber-lined butterfly valve, including disk seat and butterfly plate, be equipped with S type sealing strip on the disk seat, S type sealing strip includes the main seal strip, sealing washer and auxiliary seal strip, the main seal strip forms sealed vice with the side reason of butterfly plate, sealing washer and butterfly plate axle bed contact, the sealing washer is globular indent shape, the butterfly plate axle bed is globular evagination, the sealing washer is anastomotic each other with the butterfly plate axle bed and seals the laminating, the juncture of the side reason of butterfly plate axle bed and butterfly plate is the transition portion of butterfly plate, auxiliary seal strip and the sealed laminating of transition portion.

The utility model has the advantages that: the S-shaped sealing strip is adopted, and the main sealing strip compresses the sealing surface in a surface contact mode through a three-section sealing mode, so that the abrasion of the sealing surface is reduced, and the service life of the rubber-lined valve seat is prolonged; the sealing ring of the valve shaft insertion part is spherical and concave, so that the height of the valve seat protrusion can be reduced, and the driving torque is reduced; the auxiliary sealing strip ensures the sealing performance of the transition part on one hand, and reduces the driving torque compared with the existing large-area pressing contact on the other hand.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic structural diagram of the present embodiment when the butterfly plate is in the open state;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is an enlarged view taken at I in FIG. 2;

FIG. 5 is a schematic structural diagram of the present embodiment when the butterfly plate is in a closed state;

FIG. 6 is a cross-sectional view of FIG. 5B-B;

FIG. 7 is a cross-sectional view of FIG. 5C-C;

fig. 8 is an enlarged view of fig. 7 at ii.

In the figure: 1. a valve seat; 2. a butterfly plate; 3. an S-shaped sealing strip; 3-1, main sealing strip; 3-2. sealing ring; 3-3, auxiliary sealing strips; 4. a side edge; 5. a butterfly plate shaft seat; 6. a transition portion.

Detailed Description

As shown in fig. 1-8, a valve seat sealing structure of a rubber-lined butterfly valve comprises a valve seat 1 and a butterfly plate 2, wherein an S-shaped sealing strip 3 is arranged on the valve seat 1, the S-shaped sealing strip 3 comprises a main sealing strip 3-1, a sealing ring 3-2 and an auxiliary sealing strip 3-3, the main sealing strip 3-1 and a side edge 4 of the butterfly plate 2 form a sealing pair, the sealing ring 3-2 is in contact with a butterfly plate shaft seat 5, the sealing ring 3-2 is in a spherical concave shape, the butterfly plate shaft seat 5 is in a spherical convex shape, the sealing ring 3-2 is inosculated and sealed and attached with the butterfly plate shaft seat 5, a junction of the butterfly plate shaft seat 5 and the side edge 4 of the butterfly plate 2 is a transition part 6 of the butterfly plate, and the auxiliary sealing.

The butterfly plate 2 starts to rotate under the action of the driving device, the side edge 4 of the butterfly plate 2 is in pressure joint with the side surface of the main sealing strip 3-1 to form a main sealing area, and the main sealing strip 3-1 can realize the function that the closer and tighter the valve when the valve is closed by using the side surface as a sealing surface; the sealing ring 3-2 is always contacted with the butterfly plate shaft seat 5, on one hand, the sealing ring plays a role of isolating a medium when the valve is closed, and on the other hand, the sealing ring prevents the medium from leaking outwards so as to ensure that no leakage exists; the sealing ring 3-2 is spherical concave and is matched with the spherical convex of the butterfly plate shaft seat 5, so that the contact area is increased; and the auxiliary sealing strip 3-3 is in pressing contact with the transition part 6 and mainly ensures the sealing property of the boundary part of the main sealing strip 3-1 and the sealing ring 3-2.

Claims

1. The utility model provides a lining rubber butterfly valve' S disk seat seal structure, includes disk seat and butterfly plate, is equipped with S type sealing strip on the disk seat, its characterized in that: the S-shaped sealing strip comprises a main sealing strip, a sealing ring and an auxiliary sealing strip, the main sealing strip and the side edge of the butterfly plate form a sealing pair, the sealing ring is in contact with a shaft seat of the butterfly plate, the sealing ring is in a spherical concave shape, the shaft seat of the butterfly plate is in a spherical convex shape, the sealing ring is matched with the shaft seat of the butterfly plate and is in sealing fit with the shaft seat of the butterfly plate, the shaft seat of the butterfly plate is in a transition part of the butterfly plate at the junction of the side edge of the butterfly plate, and the auxiliary sealing strip is in sealing fit with the transition part.