CN2474853Y

CN2474853Y - Tetrafluoro butterfly valve shaft seat sealing structure

Info

Publication number: CN2474853Y
Application number: CN 01219192
Authority: CN
Inventors: 靳兆贤
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-11
Filing date: 2001-04-11
Publication date: 2002-01-30
Anticipated expiration: 2011-04-11

Abstract

The utility model relates to a four fluorine butterfly valve lower shaft seat sealed structure, wherein, a blind hole is positioned at the lower end of a valve body, an axostyle positioned at the lower end of the four fluorine valve liner in the blind hole is sleeve arranged with a four fluorine sealed circle, the middle portion of the four fluorine sealed circle is provided with a butyl rubber O-style circle. The utility model achieves simple and reasonable structure, no leakage in all medium, prevention of the leakage of the four fluorine butterfly valves and effective promotion of the rotation lubrication of the valve board.

Description

Axle bed sealing configuration under the tetrafluoro butterfly valve

The utility model relates to butterfly valve, axle bed sealing configuration under especially a kind of tetrafluoro butterfly valve.

In the prior art, the complete anticorrosion butterfly valve of tetrafluoroethylene (being called for short the tetrafluoro butterfly valve) Lower Half valve body lower end is a through hole, covers with gland below and fixes, and its shortcoming is that the seepage weeping often appears in the valve lower end, and reason is that sealing configuration is unreasonable.Because pipeline medium mostly is corrosive liquids greatly, this seepage water clock can cause situations such as burn into pollution.

The purpose of this utility model is to overcome the deficiency of prior art, and axle bed sealing configuration under a kind of tetrafluoro butterfly valve that can effectively prevent tetrafluoro butterfly valve seepage water clock is provided.

The purpose of this utility model is achieved in that

The lower end of valve body is made as blind hole, and the shaft rod upper sleeve of the tetrafluoro valve pocket lower end in this blind hole has a polytetrafluoroethylsealed sealed circle, and this polytetrafluoroethylsealed sealed circle middle part is with monobutyl glue O type circle.

Polytetrafluoroethylsealed sealed circle is 45 with the tetrafluoro valve pocket and is connected, and is equipped with a phenyl tetrafluoride pad at the blind hole inner bottom part.

Advantage of the present utility model and good effect are:

Valve body lower end adopts blind hole to replace through hole, and the joint of axostylus axostyle sheath and polytetrafluoroethylsealed sealed circle is 45 in the sealing configuration of lower end, and clamps monobutyl glue O type circle at polytetrafluoroethylsealed sealed circle middle part.Because PTFE has certain ductility, under the axostylus axostyle pressure compression, polytetrafluoroethylsealed sealed circle and phenyl tetrafluoride pad can seal tightly axostylus axostyle, and this moment, butyl rubber O type circle had certain support to axostylus axostyle again, therefore promptly prevented the seepage water clock of tetrafluoro butterfly valve, promoted effectively that again the rotation of valve plate is lubricated.The utility model is simple and reasonable, can be implemented in equal ne-leakage water clock in any medium.

Description of drawings:

Fig. 1 is a structure sectional view of the present utility model.

Below in conjunction with accompanying drawing the utility model embodiment is described in further detail:

The lower end of valve body 1 is made as blind hole, in this blind hole, be with tetrafluoro valve pocket 4 on the axostylus axostyle 2, the shaft rod upper sleeve in tetrafluoro valve pocket lower end has a polytetrafluoroethylsealed sealed circle 6, this polytetrafluoroethylsealed sealed circle is 45 with the tetrafluoro valve pocket and is connected, and polytetrafluoroethylsealed sealed circle middle part is with monobutyl glue O type circle 5.Be equipped with a phenyl tetrafluoride pad 7 at the blind hole inner bottom part.Between polytetrafluoroethylsealed sealed circle, tetrafluoro valve pocket and axostylus axostyle, be with an axostylus axostyle sheath 3.Because PTFE has certain ductility, under the axostylus axostyle pressure compression, polytetrafluoroethylsealed sealed circle and phenyl tetrafluoride pad can seal tightly axostylus axostyle, and this moment, butyl rubber O type circle had certain support to axostylus axostyle again, therefore promptly prevented the seepage water clock of tetrafluoro butterfly valve, promoted effectively that again the rotation of valve plate is lubricated.

Claims

1. axle bed sealing configuration under the tetrafluoro butterfly valve, constitute by valve body, axostylus axostyle, tetrafluoro valve pocket, it is characterized in that: the lower end of valve body is made as blind hole, and the shaft rod upper sleeve of the tetrafluoro valve pocket lower end in this blind hole has a polytetrafluoroethylsealed sealed circle, and this polytetrafluoroethylsealed sealed circle middle part is with monobutyl glue O type circle.

2. axle bed sealing configuration under the tetrafluoro butterfly valve according to claim 1 is characterized in that: polytetrafluoroethylsealed sealed circle is 45 with the tetrafluoro valve pocket and is connected, and is equipped with a phenyl tetrafluoride pad at the blind hole inner bottom part.