CN201818810U

CN201818810U - Sealing type butterfly valve at bilateral sides of shaft sleeve

Info

Publication number: CN201818810U
Application number: CN2010205739604U
Authority: CN
Inventors: 郑荣敏
Original assignee: Tianjin Yinhe Valve Co Ltd
Current assignee: Tianjin Yinhe Valve Co Ltd
Priority date: 2010-10-22
Filing date: 2010-10-22
Publication date: 2011-05-04
Anticipated expiration: 2020-10-22

Abstract

The utility model relates to a sealing type butterfly valve at bilateral sides of a shaft sleeve, which comprises a valve body, a valve seat arranged in the valve body and a valve plate supported through a valve shaft, wherein two shaft ends of the valve shaft are respectively inserted into shaft holes of an upper valve neck and a lower valve neck of the valve body; the inner wall and the end surface of an orifice of the shaft hole of the upper valve neck of the valve body are set into annular dual-step grooves; a shaft sleeve and O rings are arranged in the step groove on the inner wall of the orifice; a sleeve shaft check ring is pressed and covered at the upper end of the shaft sleeve; and a pressure plate sheathed at the shaft end in the step groove of the end surface of the orifice compresses a sleeve shaft check ring to be fixed on the groove surface of the step groove. The sealing type butterfly valve is characterized in that the shaft sleeve is made of copper, more than two inner circumferential grooves and more than two outer circumferential grooves are respectively arranged at the inner side and the outer side of the copper shaft sleeve, and the O rings corresponding to the sizes of the inner circumferential grooves and the outer circumferential grooves are respectively embedded in the inner circumferential grooves and the outer circumferential grooves. The sealing type butterfly valve has the benefits of significantly improving the sealing property and prolonging the service life.

Description

Axle sleeve bilateral sealed type butterfly valve

Technical field

The utility model relates to a kind of butterfly valve, relates in particular to a kind of axle sleeve bilateral sealed type butterfly valve.

Background technique

Butterfly valve is simple in structure because of it, volume is little, in light weight, open-close convenient is laborsaving rapidly and have good fluid control characteristic is widely used in industrial fields such as oil, coal gas, chemical industry, water treatment.Butterfly valve mainly comprises valve body, valve seat, valve plate and valve shaft, and valve shaft up and down two ends is installed in valve body respectively up and down in the axis hole of valve neck.Sealing is the key performance of valve body, last valve neck length length is again the force side that is connected with driving mechanism, for preventing that valve neck axis hole from leaking, common centre-pivoted butterfly valve is up and down between two ends and the valve shaft two axle sleeves to be installed respectively respectively at last valve neck axis hole in the traditional method, shaft room adds the sealing of O type circle, but the defective of this seal form is, when assembling by pressure unit, the excessive O type of pressure circle meeting deformed damaged, pressure is too small again can not good seal, processed complex not only, and since between valve neck and valve shaft the slit long and wide, the distortion that can be shifted of O type circle still can not obtain excellent sealing effect.In recent years, novel sealing structure has appearred again, the last valve neck axis hole aperture end face and the aperture inwall that are valve body are set to annular double step groove, in the inwall stepped slot of aperture, by bottom land pack into successively from bottom to top O type circle and teflon axle sleeve, gland cover shaft retaining ring above the axle sleeve, in the end face stepped slot of aperture, the pressing plate clamping sleeve shaft retaining ring that is sleeved on axle head is fixed on this stepped slot groove face.This novel sealing structure, make the butterfly valve seal raising, although and be positioned at the bottom O type circle under platen pressure and stepped slot support force by elastic strain shutoff slit, all have the gap between O type circle and last valve neck and valve shaft, can't reach tight shutoff, still have seepy question.

The model utility content

Main purpose of the present utility model is at the problems referred to above, and a kind of axle sleeve bilateral sealed type butterfly valve is provided, and by adopting both sides inside and outside the copper axle sleeve structure of O type circle is set respectively, butterfly valve seal is significantly improved, and increase the service life.

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

A kind of axle sleeve bilateral sealed type butterfly valve, comprise valve body, be loaded on the valve seat in the valve body, valve plate by the valve shaft support, the two axial ends of valve shaft insert respectively valve body on, in the following valve neck axis hole, the last valve neck axis hole aperture inwall and the aperture end face of described valve body are set to annular double step groove, axle sleeve and O type circle are housed in the inwall stepped slot of aperture, axle sleeve upper end gland cover shaft retaining ring, in the end face stepped slot of aperture, the pressing plate clamping sleeve shaft retaining ring that is sleeved on axle head is fixed on this stepped slot groove face, it is characterized in that described axle sleeve is copper axle sleeve, in it, in outer both sides are respectively equipped with more than two, the all grooves of outer shroud are with interior, in the corresponding described O type circle of outer shroud week groove size is inlaid in respectively, in all grooves of outer shroud.

The beneficial effects of the utility model are: adopt copper axle sleeve, the rigidity height, not yielding, lubricated and sealing is good, its inside and outside both sides are respectively equipped with two above inner and outer rings week groove setting-in O type circles, the gap of the inside and outside both sides of axle sleeve and valve neck and valve shaft is sealed respectively, and in addition, O type circle is inlaid in all grooves of ring of copper axle sleeve, positioning stablity, extruding force is strong, and butterfly valve seal is significantly improved, and increases the service life.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a structure for amplifying schematic representation of going up valve neck part among Fig. 1.

Among the figure: 1 valve body, valve neck on 11,12 times valve necks, 13 aperture inwall stepped slots, 14 aperture end face stepped slots, 2 pressing plates, 3 screws, 4 cover shaft retaining rings, 5O type circle, 6 axle sleeves, all grooves of ring in 61,62 outer shrouds week groove, 7 valve shafts, 8 valve seats, 9 valve plates.

Below in conjunction with drawings and Examples the utility model is described in detail.

Embodiment

Fig. 1～Fig. 2 illustrates a kind of axle sleeve bilateral sealed type butterfly valve, comprise valve body 1, be loaded on the valve seat 8 in the valve body, valve plate 9 by valve shaft 7 supports, the last valve neck 11 that the two axial ends of valve shaft 7 is inserted valve body respectively reaches in the axis hole of following valve neck 12, the last valve neck 11 axis hole aperture inwalls and the aperture end face of above-mentioned valve body 1 are set to annular double step groove, axle sleeve 6 and O type circle 5 are housed in aperture inwall stepped slot 13, axle sleeve upper end gland cover shaft retaining ring 4, in aperture end face stepped slot 14, be sleeved on the pressing plate 2 clamping sleeve shaft retaining rings 4 of axle head and be fixed on this stepped slot groove face by screw 3, it is characterized in that above-mentioned axle sleeve 6 is copper axle sleeve, in it, outer both sides are respectively equipped with two with all grooves 61 of upper inner ring and all grooves 62 of outer shroud, in the present embodiment, in the copper axle sleeve, outer both sides are respectively equipped with all grooves 61 of ring and all grooves 62 of outer shroud in two, with interior, in being inlaid in respectively, the corresponding O type of outer shroud week groove size circle 5 encircles in all grooves 61 and all grooves 62 of outer shroud.

The above only is a preferred embodiment of the present utility model, is not content of the present utility model is done any pro forma restriction.Every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.

Claims

1. axle sleeve bilateral sealed type butterfly valve, comprise valve body, be loaded on the valve seat in the valve body, valve plate by the valve shaft support, the two axial ends of valve shaft insert respectively valve body on, in the following valve neck axis hole, the last valve neck axis hole aperture inwall and the aperture end face of described valve body are set to annular double step groove, axle sleeve and O type circle are housed in the inwall stepped slot of aperture, axle sleeve upper end gland cover shaft retaining ring, in the end face stepped slot of aperture, the pressing plate clamping sleeve shaft retaining ring that is sleeved on axle head is fixed on this stepped slot groove face, it is characterized in that described axle sleeve is copper axle sleeve, in it, in outer both sides are respectively equipped with more than two, the all grooves of outer shroud are with interior, in the corresponding described O type circle of outer shroud week groove size is inlaid in respectively, in all grooves of outer shroud.