CN202109011U

CN202109011U - Butterfly valve seat

Info

Publication number: CN202109011U
Application number: CN201120155725XU
Authority: CN
Inventors: 刘玉山
Original assignee: TIANJIN BINHAI NEW AREA TANGGU YUZHUANG RUBBER PLANT
Current assignee: TIANJIN BINHAI NEW AREA TANGGU YUZHUANG RUBBER PLANT
Priority date: 2011-05-16
Filing date: 2011-05-16
Publication date: 2012-01-11
Anticipated expiration: 2021-05-16

Abstract

The utility model discloses a butterfly valve seat, which has a circular-ring shape matched with that of a butterfly valve body. The outer ring of the circular ring-shaped valve seat is a groove-shaped combining portion which has a T-shaped groove structure and can be embedded with the valve body in terms of shape. A circle of convex ribs are arranged at the central portion of the groove-shaped combining portion along the outer ring. The circular ring-shaped valve seat is radially provided with two corresponding through holes, side walls of which are inwardly-projecting camber convex rings. The butterfly valve seat of the utility model can be conveniently and tightly combined with a valve body. Since the inner ring is equipped with a circular slope-shaped sealing strip, the larger the pressure on a valve plate, the tighter the valve is sealed and the better the sealing performance is, thereby realizing the aim of never leakage. Adopted rubbers are authenticated by WRAS EPDM, achieving environmentally-friendly, non-toxic and tasteless effects and long service lifetime as well.

Description

Butterfly valve seat

Technical field

The utility model relates to the valve seat of a kind of control flow rate with valve, particularly relates in a kind of engineering pipeline control flow rate with the butterfly valve rubber valve seat of valve.

Background technique

Valve seat is one of major part of butterfly valve.Valve seat is contained on the valve body, and when rotating shaft drove the valve plate rotation, valve plate contacted with rubber valve seat, makes valve closing reach the effect of sealing.

Chinese patent 200920089637.7 discloses a kind of rubber valve seat that is used for butterfly valve, comprises the pedestal that is installed on the valve plate, and the set inside of said pedestal has support frame.Said support frame is a metal o-ring.Its set inside at pedestal has support frame, when being used for hyperbaric environment, and the non-deformability of Reinforced Rubber valve seat.

But the means of fixation of the valve seat of said structure adopts mode secure fit such as screw, and it is bad to cause the later stage to change, and introduces metal frame, and cost is higher.Existing valve seat, the structure that adopts backrest to combine with valve body more, this structural orientation property is bad.

The model utility content

The utility model technical problem to be solved is a kind of good seal performance to be provided, with the compact butterfly valve rubber valve seat of valve body.

To achieve these goals, the technological scheme of the utility model is following:

A kind of butterfly valve seat; It is the toroidal that is complementary with butterfly valve body; The outer ring of round ring seat is T font groove shape connecting part; One week was provided with convex tendon along the outer ring in the intermediate portion of groove shaped connecting part, round ring seat radially correspondence be provided with two through holes, described through hole up and down two ends is a spherical.

Preferably, be provided with seal ring on described spherical top.

Preferably, be provided with seal ring on described through hole top.

Preferably, the inner ring at round ring seat is the wedge-type seal band that corresponding points are provided with symmetry along the inner peripheral surface central position with two through holes.

It is convenient, tight that the utility model combines with valve body, and its inner ring is provided with a circle slope shape sealing strip, and is big more to valve plate pressure; Close tight more; Sealing is also good more, has reached the purpose that water does not leak, the rubber that adopts for through WRAS EPDM (Britain's potable water authentication) authentication material; Environmental protection, nontoxic, tasteless, long service life.

Description of drawings

Fig. 1 is the integral outer schematic representation of the utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the partial enlarged drawing of Fig. 2;

Fig. 4 is the B-B sectional view of Fig. 1.

Embodiment

Be elaborated below in conjunction with the structure of accompanying drawing to the utility model.

Shown in Fig. 1-4; The butterfly valve seat integral body of the utility model is the toroidal that is complementary with butterfly valve body; The outer ring shaped design of round ring seat be can with the valve body groove shaped connecting part 1 of embedding mutually; Described groove shaped connecting part is that the ring-shaped valve seats outer ring is recessed to form groove outwards is recessed to form the sidewall channels composition then in the groove walls both sides T font groove structure to the place, axle center, and one week was provided with convex tendon 2 along the outer ring in the intermediate portion of groove shaped connecting part 1, and the inner ring of valve seat is a spherical; Round ring seat radially correspondence be provided with two through holes 4 so that pin shaft structure passes, preferably, be to strengthen the inner seal of through hole 4, described through hole about in the of 4 two ends be spherical.Simultaneously, be provided with a circle and the seal ring 21 that spherical matees, utilize seal ring further to strengthen the sealing at bearing pin place on described spherical top.

At the inner ring of round ring seat, be corresponding points along the inner peripheral surface central position with two through holes 4, be provided with the sealing strip 3 of the wedge shape 20 of symmetry, i.e. the wedge shape 20 mirror image setting each other of both sides, big more to realize valve plate pressure, the effect that tightness is good more.

Chamfering 5 in the dual-side of circle is provided with in round ring seat interferes with valve body avoiding.The material of valve seat all adopts rubber to make, and preferably, described rubber is through WRAS EPDM (Britain's potable water authentication) authentication material, environmental protection, nontoxic, tasteless, and long service life is reached advanced world standards; And overall structure adopts no backrest design, and elasticity is big, good airproof performance.

The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.

Claims

1. butterfly valve seat; It is the toroidal that is complementary with butterfly valve body; It is characterized in that: the outer ring of round ring seat is T font groove shape connecting part; One week was provided with convex tendon along the outer ring in the intermediate portion of groove shaped connecting part, round ring seat radially correspondence be provided with two through holes, described through hole up and down two ends is a spherical.

2. butterfly valve seat as claimed in claim 1 is characterized in that: be provided with seal ring on described through hole top.

3. butterfly valve seat as claimed in claim 1 is characterized in that: the inner ring at round ring seat is the wedge-type seal band that corresponding points are provided with symmetry along the inner peripheral surface central position with two through holes.