CN2156353Y

CN2156353Y - Self-balance valve

Info

Publication number: CN2156353Y
Application number: CN 93227339
Authority: CN
Inventors: 刘树范; 刘富春; 刘德冬; 胡光清; 张国瑞; 陈善域; 丁秀芝; 胡振水
Original assignee: 刘树范
Priority date: 1993-02-18
Filing date: 1993-02-18
Publication date: 1994-02-16
Anticipated expiration: 2003-02-18

Abstract

The utility model opens a straight through small hole on the valve flap of a universal stop valve, making the upper and the lower pressures of the valve flap balance, only needing small axial force to open and close the valve. The stop valve can make a valve rod change thin and the structure of the valve compact, and the stop valve can be made into the stop valve with high pressure and large caliber. The self-balance valve can prolong the service life of the valve, and the self-balance valve is safe.

Description

Self-balance valve

A kind of self-balancing type stop valve, it is the closed circuit device that is applicable on the aqueous medium pipeline, also can be used as the throttling arrangement on the aqueous medium pipeline.

At present, normally used closed circuit device is a stop valve, and it relies on the sealing surface of flap and valve body to form sealing configuration, flowing medium is to flow into from the flap below, the open and close of valve need very big valve rod axial force, and this masterpiece is used on the flap, just can make the sealing pair forced seal.Therefore, valve rod has born very large medium active force and valve forced seal power, has so just limited the development of high pressure, heavy caliber stop valve, makes the physical dimension of stop valve excessive.

The purpose of this utility model provides a kind of pressure balance on the flap that makes, and reduces the axial force of valve rod, makes the valve mechanism compactness, opens and closes labour-saving self-balancing type stop valve.

The purpose of this utility model is achieved in that opens the aperture that stays 1-6 straight-through on flap, the pressure size of neglecting flowing medium greatly in aperture and deciding, and little hole area should be greater than 0.01 with the ratio of flap area.

Because the function of several apertures makes whole lumen be full of medium on the flap, pressure balance on the flap only needs less valve rod axial force just can or close valve opening with overcome friction.Such stop valve can reduce the axial force of valve rod, and valve rod is attenuated, and the valve mechanism compactness can be made into high pressure, the heavy caliber stop valve of present industrial urgent need, and can prolong the working life of valve, and is safe and reliable.

Be described in detail structure of the present utility model as follows in conjunction with the accompanying drawings and embodiments:

Fig. 1 is the structural profile schematic representation of the manual self-balancing type stop valve of the utility model release.

Fig. 2 is the structural profile schematic representation of the electronic self-balancing type stop valve of the utility model release.

Embodiment 1

The self-balancing type stop valve is by valve body 1, flap 2, valve rod gland 3, pilot seal cover 4, valve rod 5, valve gap 6, support 7 and handwheel 8 are formed, valve body 1 two ends are machined into bevel for welding and pipeline welding, flap 2 cylindrical piston types, have O type sealing circular groove on the external diameter, central openings at flap 2 is chosen button, pilot seal is overlapped 4 first halves and is cylindrical block shape, Lower Half is the fence shape that has groove, leading screw is processed on valve rod 5 tops, the middle part polished rod, the bottom stem head, valve gap 6 bottoms are the seams that have the O RunddichtringO, valve body 1 links into an integrated entity with valve gap 6 usefulness threaded pieces, support 7 is integrally welded with valve gap 6, and flap 2 is installed in the pilot seal cover 4, and pilot seal cover 4 fuses with valve gap 6 after being fitted in the valve body 1, valve rod 5 is by support 7, behind the valve gap 6, valve rod gland 3 on lower end and the flap 2 flexibly connects, and makes flap 2 that fine motion can be arranged, and guarantees flap 2 proper motion in pilot seal cover 4, no jam phenomenon, the upper end of valve rod 5 is connected with handwheel 8.Like this, valve body 1 is formed sealing pair with flap 2, O RunddichtringO on flap 2 external diameters and pilot seal cover 4 are formed the soft seal pair, valve gap 6 is formed sealing pair with pilot seal cover 4 and valve rod 5, and between flap 2 and pilot seal cover 4 and valve gap 6, form a changeable middle cavity volume of volume, it is characterized in that opening on flap 2 and stay 1-6 straight-through aperture, little hole area should be greater than 0.01 with the ratio of flap 2 areas.

During the rotation of handwheel 8 clockwise directions, valve rod 5 and flap 2 move downward, and path are cut off then path unlatching when being rotated counterclockwise.

When the utility model uses when throttle valve, but clockwise direction rotation hand wheel 8, and valve rod 5 moves down, and promotes flap 2 and descends along pilot seal cover 4, makes pilot seal overlap 4 open channel areas and dwindles gradually, reduces flow, increases fluid pressure loss; It is opposite to be rotated counterclockwise 8 on handwheel.

Embodiment 2

Handwheel in embodiment 1 the stop valve 8 is removed, allowed the upper end of valve rod 5 be connected, can use the motor opening/shutting valve with Stem Mut 9, clutch 10, Electric actuator 11.

Claims

1, a kind of self-balancing type stop valve, it comprises valve body, flap, the valve rod gland, the pilot seal cover, valve rod, valve gap, support, handwheel, Stem Mut, clutch and Electric actuator, valve body and valve gap link into an integrated entity with threaded piece, support and valve gap are integrally welded, flap is installed in the pilot seal cover, the pilot seal cover fuses with valve gap after being fitted in the valve body again, valve rod passes through support, behind the valve gap, valve rod gland on lower end and the flap flexibly connects, upper end and handwheel or bolt and nut, clutch, Electric actuator connects, and it is characterized in that opening on flap the aperture that stays 1-6 to lead directly to.

2, self-balancing type stop valve according to claim 1 is characterized in that opening on the flap the straight-through aperture that stays, and its area should be greater than 0.01 with the ratio of flap area.