CN2360686Y

CN2360686Y - Non-leakage stop valve

Info

Publication number: CN2360686Y
Application number: CN 98248650
Authority: CN
Inventors: 蔡树建
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-11-11
Filing date: 1998-11-11
Publication date: 2000-01-26
Anticipated expiration: 2008-11-11

Abstract

The utility model belongs to a non-leakage stop valve which can be used in various pipelines. The utility model comprises a valve body, a valve cover, a hand wheel, a valve stem, a valve disc, a fastening piece, etc. The utility model is characterized in that the non-leakage stop valve also comprises a separating element connected with the valve disc, and the edge of the separating element is fixed at the binding site between the valve body and the valve cover. The utility model has the advantages of simple design and convenient realization, and can effectively prevent the leakage of the valve. The loss of the material is reduced, the corrosion and the damage on equipment from the leakage object are avoided, the pollution is reduced and the environmental is protected.

Description

Non-leakage stopping valve

The utility model relates to a kind of valve, especially a kind of non-leakage stopping valve.

Valve is widely used in all kinds of fluid-transporting tubings.But for a long time, the leakage problem of valve between valve rod and valve gap never thoroughly solves.For this reason, some product is filled filler in the slit between valve rod and valve gap, leak to stop up, but after a period of time used, filler can wear and tear, wear out, and sealability descends, and leaks progressively aggravation.Leak the loss not only can cause material, also can etching apparatus, befouling environment.

The purpose of this utility model is to design a kind of stop valve that can not produce leakage.

The technical solution of the utility model is: a kind of non-leakage stopping valve, comprise valve body 1, valve gap 2, handwheel 3, valve rod 4, valve disc 5 and fastening piece etc., it is characterized in that: also comprise a slider 6 that is connected with valve disc 5, its edge is fixed on the connecting part of valve body 1 and valve gap 2.

Be described further below in conjunction with the embodiment in the accompanying drawing.

Fig. 1: the utility model embodiment 1.

Fig. 2: the utility model embodiment 2.

The effect of slider 6 is that the cavity between valve body 1 and the valve gap 2 is isolated into two parts, and valve rod 4, valve disc 5 are in the upper cavity of slider 6 and valve gap 2 formations, with the fluid isolation in the lower cavity, thereby have avoided fluid to leak along valve rod 4.The top edge of slider 6 is clipped between the connecting part of valve body 1 and valve gap 2 with seal ring, and fixes with fastening piece.

Referring to the embodiment among Fig. 11.

The middle part of described slider 6 is coated on the valve disc 5, and slider 6 can be by rubber, also can be made of poly-perfluoro second propylene (F46) plastics.Because slider 6 is to be made by flexible material, therefore can not hinder the upper and lower motion of valve disc 5 with valve rod 4.Simultaneously; Be coated on flexible isolating body 6 on the valve disc 5 also make between valve disc 5 and the valve body 1 engage tighter, better tightness.

Referring to the embodiment among Fig. 22.

Described slider 6 comprises a metal bellows expansion bend 7 and the expansion bend loam cake 8 that is tightly connected with it, and the lower end of metal bellows expansion bend 7 is connected with the top seal of valve disc 5, and the edge of expansion bend loam cake 8 is fixed on the connecting part of valve body 1 and valve gap 2.Because metal bellows expansion bend 7 can be stretched vertically under external force, contract, so also can not influence the upper and lower motion of valve disc 5 and valve rod 4.Tightly welding between metal bellows expansion bend 7 and the valve disc 5 is to guarantee its sealing.Among the figure, the 9th, seal ring, A are opening state, B is a closed condition.

Because valve rod 4 no longer is subjected to the restriction of filler size, and the screw thread pitch diameter of valve rod 4 can be amplified as required, single screw thread becomes multiple thread, thus can also produce the effect that makes the valve quick closing valve, and avoided the excessive influence of helix angle to close the drawback of power.

The utility model simplicity of design is convenient to realize.Can prevent valve leak effectively, both reduce the loss of material, avoid the burn into destruction of leakage again, can also reduce pollution, the protection environment equipment.

Claims

1. non-leakage stopping valve, comprise valve body (1), valve gap (2), handwheel (3), valve rod (4), valve disc (5) and fastening piece etc., it is characterized in that: also comprise a slider (6) that is connected with valve disc (5), its edge is fixed on the connecting part of valve body (1) and valve gap (2).

2. non-leakage stopping valve according to claim 1 is characterized in that: the middle part of described slider (6) is coated on the valve disc (5), and slider (6) can be by rubber, also can be made of poly-perfluoro second propylene (F46) plastics.

3. non-leakage stopping valve according to claim 1, it is characterized in that: the expansion bend loam cake (8) that described slider (6) comprises a metal bellows expansion bend (7) and is tightly connected with it, the lower end of metal bellows expansion bend (7) is connected with the top seal of valve disc (5), and the edge of expansion bend loam cake (8) is fixed on the connecting part of valve body (1) and valve gap (2).