CN2549273Y

CN2549273Y - Three-eccentric conic sealed butterfly valve

Info

Publication number: CN2549273Y
Application number: CN 02221066
Authority: CN
Inventors: 杨瑞成
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-04
Filing date: 2002-06-04
Publication date: 2003-05-07
Anticipated expiration: 2012-06-04

Abstract

The utility model relates to a butterfly value which is characterized in that: a butterfly board and a pressed seal cirque are an entirety. The value top is provided with a transmission bracket which is rectangular frame type and the joint with the value is step tabling plane connection. The utility model adopts conical surface entire elasticity butterfly board, which improves the nominal pressure level of the butterfly value to 6.3 MPa. The seal function type transmission bracket is adopted, thereby simplifying the bottom structure of the value shaft of the butterfly value, eliminating the possibility of outside leak of the lower end face and improving the reliability of product. The utility model has simple structure, good process and seal performance and wide application.

Description

Three eccentric conical surface seal butterfly valves

Technical field

The utility model relates to a kind of valve, exactly is three eccentric conical surface seal butterfly valves.

Background technique

Seal butterfly valve is minimus a kind of in the ten big classes industry valves, also has been the fastest a kind of of valve production development since nearly 20 years.At present, four kinds of structure types are arranged, first kind is " mesinae rubber seal butterfly valve ", and second kind is " off-axis type rubber seal butterfly valve ", and above-mentioned these two kinds of valves all are subjected to the restriction of rubber material, generally can only be applicable to the industrial pipeline of normal temperature low pressure.Simultaneously owing to weakness such as rubber material are easily aging, and friction ractor is big, so its Applicable scope and working life are very limited.The third is " two eccentric metal hard sealed butterfly damper ", and this structure belongs to circular arc line contact seal, although improve a lot than rubber butterfly bamper on Applicable temperature and pressure, unfavorable is to occur the difficult situation that valve can't be opened sometimes.The 4th kind is " three eccentric metal hard sealed butterfly damper ", for reducing the difficulty on the process engineering, butterfly plate is divided into two-part, a part is the body portion that is connected with valve shaft, another part is that the sealing surface position is designed to a seal ring separately, then two-part is assembled together; But the once assembling up-to-standard rate of product is very low, thereby a large amount of in batch production be restricted, and cost of production is quite high, so restricted applying of this valve.

Summary of the invention

In view of above situation, by the improvement to the 4th kind of butterfly valve structure, the utility model provides a kind of simple in structure, good airproof performance, the wide conical surface seal butterfly valve of Applicable scope.

The concrete structure scheme is as follows:

1, three eccentric conical surface seal butterfly valves comprise valve body, butterfly plate, valve shaft and Sealing, it is characterized in that: butterfly plate is provided with the compression seal annulus of disjunctor.

2, on the compression seal annulus of butterfly plate, bear pressure medium one side and be provided with a circle elasticity groove.

3, be respectively equipped with overlay cladding on butterfly plate sealing surface and the valve body sealing surface.

4, the top of valve body is provided with transmission bracket, and transmission bracket is the rectangle frame posture, is that step inserted type plane is connected with the valve body joint, and the transmission bracket top relative with valve body is provided with the valve shaft through hole.

5, the corresponding valve shaft blind hole that is provided with of valve body lower portion with the upper valve axis hole, the valve shaft lower end is positioned at the blind hole of valve body lower portion, and the valve shaft upper end is arranged with spacing back-up ring, and is positioned at the valve shaft through hole on valve body top.

The utility model has been owing to adopted conical surface integral, flexible butterfly plate, thereby makes the nominal pressure rank of this butterfly valve bring up to 6.3Mpa.Owing to adopted closed function type transmission bracket, thereby the valve shaft substructure of this butterfly valve greatly simplified, also eliminate the lower end surface virtually and caused the possibility that leaks outside, improved reliability of products.Simple in structure, the good manufacturability of the utility model, good airproof performance, applied widely.

Description of drawings

Fig. 1 is the utility model structural representation,

Fig. 2 is Fig. 1 left view,

Fig. 3 is butterfly plate and valve body cooperation place partial enlarged drawing.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

This three eccentric conical surface seal butterfly valve comprises valve body 1, butterfly plate 2, valve shaft 3 and Sealing, sees Fig. 1.The compression seal annulus 8 that disjunctor is arranged on the butterfly plate 2.On the compression seal annulus 8 of butterfly plate 2, bear a circle elasticity groove 9 arranged on pressure medium one side.On butterfly plate 2 sealing surfaces and valve body 1 sealing surface overlay cladding 10 is arranged respectively, see Fig. 3.

The top of valve body 1 is installed with transmission bracket 4, and transmission bracket 4 is the rectangle frame posture, is that step inserted type plane is connected with valve body 1 joint, and this Placement is reliable and stable, bearing capacity is strong, and bolt can not become flexible, and sees Fig. 2; The side of transmission bracket 4 is installed with closed cover 6 respectively, has guaranteed can not accumulate dust and dirt in the transmission bracket, can change or compress stuffing box packing very easily after opening closed cover.

Transmission bracket 4 tops relative with valve body 1 have the valve shaft through hole.Valve body 1 bottom and the corresponding valve shaft blind hole that has of transmission bracket 4 upper valve shaft through-holes.Valve shaft 3 upper ends are set with spacing back-up ring 7, and spacing back-up ring 7 is used for limiting the axial float of valve shaft 3; Valve shaft 3 upper ends are positioned at the valve shaft through hole on valve body 1 top.Valve shaft 3 lower ends are positioned at the blind hole of valve body 1 bottom.

Claims

2, according to claim 1 three eccentric conical surface seal butterfly valves is characterized in that: on the compression seal annulus of butterfly plate, bear pressure medium one side and be provided with a circle elasticity groove.

3, according to claim 1 three eccentric conical surface seal butterfly valves is characterized in that: be respectively equipped with overlay cladding on butterfly plate sealing surface and the valve body sealing surface.

4, according to claim 1 three eccentric conical surface seal butterfly valves, it is characterized in that: the top of valve body is provided with transmission bracket, transmission bracket is the rectangle frame posture, is that step inserted type plane is connected with the valve body joint, and the transmission bracket top relative with valve body is provided with the valve shaft through hole.

5, according to claim 1 three eccentric conical surface seal butterfly valves, it is characterized in that: the corresponding valve shaft blind hole that is provided with of valve body lower portion with the upper valve axis hole, the valve shaft lower end is positioned at the blind hole of valve body lower portion, and the valve shaft upper end is arranged with spacing back-up ring, and is positioned at the valve shaft through hole on valve body top.