CN2438899Y

CN2438899Y - Sealing elastic inner pressing self-sealing valve

Info

Publication number: CN2438899Y
Application number: CN 00217425
Authority: CN
Inventors: 周孝民
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-26
Filing date: 2000-04-26
Publication date: 2001-07-11
Anticipated expiration: 2010-04-26

Abstract

The utility model relates to a sealing elastic inner pressing self-sealing valve, which comprises a hand wheel, a valve rod, a valve cap, a valve body, a valve clack and a nut. The utility model is characterized in that a positioning check ring is arranged in the nut, a V-shaped sealing ring is arranged between the valve rod and the nut, and an elastic steel ring is arranged on the V-shaped sealing ring. The utility model has the advantage of compact structure, fully uses a negative pressure zone in the valve, solves the easily generated leakage problem caused by the mechanical wear of traditional valves, and extends the service life of the valve.

Description

Sealed type elasticity Pressure seat valve

The utility model relates to a kind of sealed type elasticity Pressure seat valve.

A mouthful sealing means all adopts asbestos rope, Tetrafluoro spacer as filler in the conventional valves valve rod, is pressed in the filler chamber valve rod is compressed, and in use has the wearing and tearing between valve rod and the filler and is easy to become flexible, and causes problems such as leakage.

A new generation's plunger valve seal degree slightly improves, its adopts metal and different high temperature in conjunction with fluid of expansion ratio between nonmetal, adds that mechanical pressure is pressed on the graphite plastic circle in the filler chamber, but ten thousand changes are not from wherein, finally do not break away from bigger mechanical wear, cause valve leak.

The purpose of this utility model is to provide a kind of sealed type elasticity Pressure seat valve, and it is on the basis of conventional valves, improves and improves, and removes the filler part, has solved the easy leakage problem of above-mentioned existence effectively, and longer service life.

The purpose of this utility model takes following measure to realize:

The utility model adopts seal ring that specific rubber makes to reach valve rod rotating continuously for a long time or moving up and down and do not leak in conjunction with pressing in the fluid, opens and closes design proposal easily.The utility model utilizes the elastic device of rubber seal, and the valve rod bullet is tight, makes valve rod make regular motion up and down by handwheel as circular movement, and the promotion valve is done and opened and closed.The specific design scheme is: the location ring washer is set in the nut of former valve, V-shaped seal ring or U RunddichtringO are set between valve rod and nut, flexible steel ring is set on seal ring.

Embodiment elaborates to the utility model below in conjunction with accompanying drawing:

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

Among the figure: 1. handwheel 2. location ring washer 3. nut 4.V RunddichtringOs 5. flexible steel rings 6. negative pressuren zones 7. valve rods 8. valve gaps 9. valve bodies 10. valves are done 11. outlet passages

Embodiment with reference to the accompanying drawings:

The utility model sealed type elasticity Pressure seat valve is the improvement of valve mechanism commonly used.It comprises that handwheel 1, valve rod 7, valve body 9, valve gap 8, nut 3, valve do 10 and outlet passage 11.Handwheel 1 is affixed with an end of valve rod 7, and the other end of valve rod 7 is connected with valve and does 10.Valve gap 8 is connected as a single entity with valve body 9.3 on valve rod 7 and nut are provided with seal ring, and the structure of seal ring can be a V-structure, also can be U type structures, and present embodiment is a V-shaped seal ring 4.One circle flexible steel ring 5 is set on the V-type angle of V-shaped seal ring 4, and its effect is to strengthen the elastic force of V-type rubber seal to valve rod 7.Sheathed location ring washer 2 on the valve rod 7 in nut 3, it act as the elastic force of strengthening 4 pairs of valve rods 7 of V-type rubber seal.Valve rod 7, valve gap 8 and 4 of V-type rubber seal form negative pressuren zone 6.Under the pressure of nut 3, seal ring is in the static sealing state; Owing under the effect of flexible steel ring 5 and negative pressuren zone 6, make seal ring reach the dynamic seal (packing) state.In the time of need opening valve, toward rotation counterclockwise, valve rod 7 drives valve and does 10 pull-ups, and outlet passage 11 is opened with handwheel 1; During throttle down, toward the clockwise direction rotation, valve rod 7 promotion valves are done 10 and are depressed, and outlet passage 11 is closed with handwheel 1.

Structural design of the present utility model compared with prior art has outstanding advantage: this Utility model arranges V-shaped seal ring and flexible steel ring between nut and valve rod, take full advantage of bullet The negative pressuren zone of property steel ring bottom under the pressure of nut, makes sealing ring be in the static sealing state, And under the effect of flexible steel ring and negative pressuren zone, make again sealing ring reach the dynamic seal (packing) state, because of And reduced the mechanical wear of valve rod, prolonged service life.

Claims

1, a kind of sealed type elasticity Pressure seat valve comprises that handwheel, valve rod, valve gap, valve body, valve do and nut, it is characterized in that the location ring washer is set in the described nut, between valve rod and nut V-shaped seal ring is set, and flexible steel ring is set on the V-shaped seal ring.

2, sealed type elasticity Pressure seat valve according to claim 1 is characterized in that described V-shaped seal ring can be arranged to U type structure.