CN203670840U

CN203670840U - Butterfly valve seat good in sealing performance

Info

Publication number: CN203670840U
Application number: CN201320735695.9U
Authority: CN
Inventors: 赵树起; 张小娟; 庞慧高
Original assignee: QICHANG VALVE MANUFACTURING Co Ltd
Current assignee: QICHANG VALVE MANUFACTURING Co Ltd
Priority date: 2013-11-19
Filing date: 2013-11-19
Publication date: 2014-06-25
Anticipated expiration: 2023-11-19

Abstract

The utility model relates to a butterfly valve seat good in sealing performance. The butterfly valve seat good in sealing performance is of a ring body structure, the upper end and the lower end of the ring body are respectively provided with a fixed convex ring, the two fixed convex rings are coaxial and symmetrical, an inner boss is coaxially arranged in the middle of the inner edge of the ring body, and two through shaft sleeve holes are formed in the position where the inner boss is located of the ring body. The butterfly valve seat good in sealing performance is characterized in that spherical surfaces which are in mirror symmetry are arranged on the two shaft sleeve holes and located at the position where the inner boss is located, and an upper shaft sleeve surface and a lower shaft sleeve surface of a valve plate operate on the two spherical surfaces. According to the butterfly valve seat good in sealing performance, due to the fact that the contact surfaces between the valve seat and a shaft sleeve of the valve plate are designed into spherical surfaces, the contact area between the valve seat and the valve plate is enlarged, stress of the valve seat is made more even, and the torque is small.

Description

A kind of butterfly valve seat of good airproof performance

Technical field

The utility model belongs to valve field, relates to butterfly valve, especially a kind of butterfly valve seat of good airproof performance.

Background technique

Butterfly valve is widely used in all kinds of pipelines, and the fluid in pipeline is regulated or blocked, and valve seat has played vital effect in this type of valve.Valve seat conventional in butterfly valve generally has metal seat valve and rubber valve seat, and metal seat valve is used in mesolow work condition environment, but in actual applications, the undesirable and processed complex of leakage rate; The sealability of rubber valve seat is good, in environment under low pressure, can reach zero leakage, but while application in hyperbaric environment, because the pressure medium in pipeline is large, rubber valve seat can deform and even be come off by impact, has limited the application of soft sealing butterfly valve in high-pressure environment.

The axle sleeve hole of existing rubber valve seat and the surface of contact of valve plate are designed to plane, although good processing, this structural entity discontinuity, it is not firm that valve plate contacts with valve seat, easily causes leakage.

Model utility content

The purpose of this utility model is to overcome the deficiencies in the prior art part, provides a kind of simple in structure, the butterfly valve seat of good seal performance.

The technological scheme that the utility model technical solution problem adopts is:

A kind of butterfly valve seat of good airproof performance, described valve seat is a cirque body structure, respectively be shaped with a fixing bulge loop at the upper and lower two side ends coaxial-symmetrical of cirque body, coaxially be shaped with an inner convex platform at cirque body inner edge middle part, on the cirque body of inner convex platform position, be radially shaped with consistent two logical axle sleeve holes, it is characterized in that: described two axle sleeve holes in inner convex platform position equal mirror image symmetry make sphere, on these two spheres, move upper, two boss face of valve plate.

Advantage of the present utility model and good effect are:

1, the axle sleeve surface of contact of valve seat and valve plate is designed to sphere by this valve seat, increased thus the area of contact of valve seat and valve plate, makes it stressed more even, and moment of torsion is little.

2, the structure of this valve seat is more suitable for the valve plate of arc, and valve seat and valve plate fit tightly, good sealing effect.

Accompanying drawing explanation

Fig. 1 is plan view of the present utility model;

Fig. 2 is use phase diagram of the present utility model.

Embodiment

Below in conjunction with accompanying drawing and by specific embodiment, the utility model is described in further detail, and following examples are descriptive, are not determinate, can not limit protection domain of the present utility model with this.

A kind of butterfly valve seat of good airproof performance, described valve seat is cirque body 2 structures, respectively be shaped with a fixing bulge loop 1 at the upper and lower two side ends coaxial-symmetrical of cirque body, coaxially be shaped with an inner convex platform 3 at cirque body inner edge middle part, on the cirque body of inner convex platform position, be radially shaped with consistent two logical axle sleeve holes, these two axle sleeve holes in inner convex platform position equal mirror image symmetry make sphere 4, on these two spheres, move upper, two boss face of valve plate.

Claims

1. the butterfly valve seat of a good airproof performance, described valve seat is a cirque body structure, respectively be shaped with a fixing bulge loop at the upper and lower two side ends coaxial-symmetrical of cirque body, coaxially be shaped with an inner convex platform at cirque body inner edge middle part, on the cirque body of inner convex platform position, be radially shaped with consistent two logical axle sleeve holes, it is characterized in that: described two axle sleeve holes in inner convex platform position equal mirror image symmetry make sphere, on these two spheres, move upper, two boss face of valve plate.