CN101539209A

CN101539209A - Plug valve with replaceable valve seat and production method of valve seat

Info

Publication number: CN101539209A
Application number: CN200910011313A
Authority: CN
Inventors: 黄剑峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-28
Filing date: 2009-04-28
Publication date: 2009-09-23

Abstract

The invention relates to a plug valve with a replaceable valve seat and a production method of the valve seat, aiming to solving the problem that a prior plug valve with a replaceable valve seat prevents an integral PFA fluoroplastic valve seat from being easy to deform and the positioning from being difficult during production. The plug valve with the replaceable valve seat comprises a valve body, the valve seat, a plug cock, a valve cover, a sealing membrane and a handle, wherein an integral stainless steel framework is embedded into the valve seat, the cone wall of the stainless steel framework is provided with four windows which are opposite in pairs, one pair of opposite windows is respectively embedded into the circumferences of two sealing passages of the valve seat, and the upper end and the lower end of the integral stainless steel framework are provided with a plurality of positioning openings. The production method of the valve seat is as follows: when the valve seat of the plug valve with the replaceable valve seat is produced, the integral stainless steel framework is placed into a valve seat injection mould, a positioning pin of the valve seat injection mould is clamped on the positioning openings positioned on the upper end and the lower end of the integral stainless steel framework, and then PFA fluoroplastic is injected. The invention has the advantages that the valve seat is difficult to be deformed during production and usage and has easy and accurate positioning during the production.

Description

The production method of exchangeable valve seat stopcock and valve seat thereof

Technical field:

The present invention relates to the production method of a kind of exchangeable valve seat stopcock and valve seat thereof.

Background technique:

Existing exchangeable valve seat stopcock is in order to prevent the distortion of PFA fluoroplastic valve seat and to increase valve seat intensity, what have buries skeleton on every side respectively underground at two sealing channels, the position contraction deformation of not burying skeleton when problem is production underground is big, particularly under high temperature, condition of high voltage, use distortion more serious, so that cause the valve seat bulk deformation, influence usability; Another problem that exists is that two skeletons set up separately, and positioning difficulty is big during production.

Summary of the invention:

It is not yielding under high temperature, condition of high voltage that technical problem to be solved by this invention provides a kind of valve seat yet, and the location is easy to the production method of exchangeable valve seat stopcock and valve seat thereof during production.

It is that it also comprises valve body, valve seat, cock, valve gap, seal membrane, handle etc. that above-mentioned purpose is achieved in that same as the prior art, and valve seat is a separate piece that is installed in the valve body, and is detachable; Unlike the prior art be to be embedded with the whole stainless steel insert that has identical tapering with valve seat in the described valve seat, on the cone wall of skeleton, establish four windows, relative in twos, wherein a pair of relative window be embedded in respectively valve seat two sealing channels around, there are several positioning ports the top and bottom of whole stainless steel insert;

The production method of valve seat is: when making the valve seat of exchangeable valve seat stopcock, whole stainless steel insert is put into the valve seat injection mould, the locating stud of mould is stuck on the positioning port of stainless steel integrated skeleton upper and lower end, then injection moulding PFA fluoroplastic.

Advantage of the present invention is: because the stainless steel insert that is embedded in the valve seat is whole skeleton, so valve seat is not yielding when producing, under high temperature, condition of high voltage, use not yielding yet, valve seat intensity height, usability can not change; And because stainless steel insert is whole skeleton, and the skeleton upper and lower end has positioning port, so the location easily, accurately.

Description of drawings:

Fig. 1 is the overall structure generalized section of exchangeable valve seat stopcock of the present invention;

Fig. 2 is the cross-sectional view of overlooking of valve seat amplification of the present invention;

Fig. 3 is that the master that the whole skeleton buried underground in the valve seat of the present invention amplifies looks cross-sectional view;

Fig. 4 is the side-looking cross-sectional view that the whole skeleton buried underground in the valve seat of the present invention amplifies;

Fig. 5 be the whole skeleton buried underground in the valve seat of the present invention amplify overlook cross-sectional view.

Embodiment:

Referring to figs. 1 through 5, it comprises valve body 1, valve seat 2, cock 3, valve gap 4, seal membrane 5, handle 6, and valve seat is a separate piece that is installed in the valve body, and is detachable; Be embedded with the whole stainless steel insert 7 that has identical tapering with valve seat in the described valve seat, on the cone wall of skeleton, establish four windows, relative in twos, wherein a pair of relative window 8 be embedded in respectively valve seat two sealing channels around, there are several positioning ports the top and bottom of whole stainless steel insert.

Claims

1, exchangeable valve seat stopcock comprises valve body (1), valve seat (2), cock (3), valve gap (4), seal membrane (5), handle (6), and valve seat is a separate piece that is installed in the valve body, and is detachable; It is characterized in that being embedded with in the described valve seat the whole stainless steel insert (7) that has identical tapering with valve seat, on the cone wall of skeleton, establish four windows, relative in twos, wherein a pair of relative window (8) be embedded in respectively valve seat two sealing channels around, there are several positioning ports the top and bottom of whole stainless steel insert.

2, the production method of exchangeable valve seat stopcock valve seat, it is characterized in that: when making the valve seat of exchangeable valve seat stopcock, whole stainless steel insert is put into the valve seat injection mould, the locating stud of mould is stuck on the positioning port of stainless steel integrated skeleton upper and lower end, then injection moulding PFA fluoroplastic.