CN2122275U

CN2122275U - Sealing valve without leakage

Info

Publication number: CN2122275U
Application number: CN 92228083
Authority: CN
Inventors: 蒋光丛
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-17
Filing date: 1992-07-17
Publication date: 1992-11-18

Abstract

The utility model discloses a valve which can ensure that after the valve is opened, the valve can not be leaked. The valve of the utility model adopts an elastic corrugated pipe instead of the sealing mode of traditional padding, such as asbestos packing, etc. Both ends of the corrugated pipe are respectively and tightly connected with a valve body and a valve stem without any leakage. The valve stem can only longitudinally move from top to bottom and can not rotate. Therefore, after the valve is opened, any leakage can not occur.

Description

Sealing valve without leakage

The utility model relates to a kind of seal valve of elastic bellows, as long as the permission of the life-span of this bellows, the sealing valve promptly can not leak after unlatching, and is especially more effective to gas.

At present, the general sealing means of various valves promptly removes to compress fillers 2 such as asbestos packing, as shown in Figure 1 to reach the purpose of sealing with gland nut 1.But, because valve rod 3 will move up and down with respect to adding material 2 in rotation, between them the gap will appear, behind valve opening, will leak, and when particularly the valve of this structure was used for gas (as natural gas, coal gas etc.), its leakage was even more serious.

The purpose of this utility model provides a kind of seal valve that do not leak, and it can solve the leakage problem behind the valve opening up hill and dale.

The purpose of this utility model is achieved in that and does not at first re-use traditional fillers such as asbestos packing, replaces a kind of flexible bellows.One end of this bellows is connected with valve body, and the other end connects with valve rod, because the connection at these two ends all very closely (as bonding, as to compress etc.) does not have relative movement again, sealing will not leaked.Because bellows can only do tension and compression longitudinally, to guarantee on structural design therefore that valve rod also can only be done longitudinally to move up and down, can not rotate.More such measures have been arranged, just can realize its purpose satisfactorily.

Owing to adopt such scheme, just can guarantee valve after opening, no longer occur between valve rod and the valve body leaking.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 2, Fig. 3, Fig. 4 are three embodiments' sectional structure charts.

In the drawings, the 1-handle, 2-opens nut, the 3-gland nut, the 4-packing washer, the 5-elastic bellows, the 6-valve rod, the 7-valve body, 8-prevents bull stick, 9-prevents rotor.

In Fig. 2, tighten gland nut 3, can exert pressure to packing washer 4, thereby the upper end that makes the top of bellows 5 and valve rod 7 shutting tightly can not leaked.Can guarantee not leak with binder or other mode being linked together tightly between the lower end of bellows and the valve rod 6.When rotatable handle 1, promptly drive and open nut 2 rotations, thereby valve rod 6 is risen.In order to guarantee that valve rod does not rotate, designed two to four anti-rotation bars 8 in its underpart, because it is the indentation, there (seeing partial view A) that is inserted in the valve body, therefore guaranteed the valve rod Shi Buhui rotation that moves up and down.

Fig. 3 and Fig. 2 do not have the difference of essence, have just done a little changes on superstructure, make the valve body upper opening can be bigger, thereby make the valve rod lower end can be more greatly yet, so just can make valve opening after flow area greatly.

Fig. 4 is a kind of structure of needle type valve, is more suitable in gas medium.Because the lower end of valve rod 6 is cones, can not arrange anti-bull stick again, therefore just opened two grooves at an upper portion thereof, because the effect of anti-rotor 9 makes it can not rotate (seeing sectional view A-A).Certainly, this structure also can be used on Fig. 2, among the embodiment of Fig. 3.

Claims

1, a kind of seal valve that do not leak is made up of handle, valve rod, valve body, it is characterized in that: by gland nut, packing washer, the two ends of elastic bellows are compressed with valve rod, valve body respectively.

2, the seal valve that do not leak according to claim 1 is characterized in that: the two ends of elastic bellows are bonding with valve rod, valve body respectively.

3, according to claim 1, the 2 described seal valves that do not leak, it is characterized in that: anti-bull stick is arranged at the bottom of valve rod, inserts the indentation, there in the valve body.

4, according to claim 1, the 2 described seal valves that do not leak, it is characterized in that: two grooves are arranged at the top of valve rod, and the inside is inserted with anti-rotor.