CN2184818Y - Pressure-free water stop valve - Google Patents

Abstract

The utility model relates to a valve, particularly a valve which can be automatically closed when the water supply is cut off. the inside of a valve body is provided with an elastic sealing pad, and the elastic sealing pad is pressed and sealed by a piston; the upper part of a piston rod is pushed against the tip part of a wedged rod; when the valve is opened, the wedged rod shrinks backwards, and the piston can move upwards; when the water supply is cut off, the tip of the wedged rod is pushed against the piston rod, and the piston rod can move downwards to press and seal the sealing pad; the purpose that the automatic closure can be carried out when the water supply is cut off is reached thereby.

Description

Pressure-free water stop valve

The utility model relates to a kind of valve, the valve that can close automatically during particularly a kind of cutting off the water.

Because water system such as building is often cut off the water, unmanned and do not close or the water tap that is not closed completely is metalled run out with regard to making in that room when sending water once more, flood house earth surface, dashed the neighbours house that wet, both caused certain economic loss, also wasted the energy.

The purpose of this utility model is to provide a kind of elastic sealing gasket that installs in valve body, and by the piston press seal, piston rod top withstands on the tapered bar tip, when opening, behind the tapered bar, contract, make on the piston and move, piston rod is lived on the tapered bar pinnacle when cutting off the water, make it move down the press seal sealing gasket, reach the purpose of water-stopping self-closing.

The purpose of this utility model realizes by following measure:

It comprises valve body, sealing gasket, trim ring, piston, clamping nut, spring, valve gap, tapered bar, stage clip, the upper end has vertical port in the described flow channel of valve water intake, encapsulation one elastic sealing gasket on this port, around the pad by the trim ring press seal in valve body on the concave station, piston is contained in the trim ring, one spring is pressed thereon, the upper end withstands in the valve gap inner groovy, one clamping nut is screwed in the inner bolt hole of valve body top, trim ring is compressed, spiral cover has valve gap on this screw, and the valve rod string is crossed valve gap and withstood in the horizontal hole; Tapered bar is contained in the horizontal shrinkage pool of valve gap, and stage clip one end withstands on the tapered bar boss, and the other end withstands on the nut; The inner ring of described trim ring and sealing gasket touching position has chamfering; The front end of tapered bar is cone-shaped, and the rear end is equipped with handwheel, is connected on the tapered bar through nut.

Advantage of the present utility model and effect are:

1. the casting of valve body and valve gap is made, in addition two spring one pistons and tapered bar; Its designs simplification is given and is made, installs and brought convenience, has reduced product cost simultaneously.

2. in valve body the flow channel, all sealed pad of other parts is isolated in the erosion that top is not subjected to water, thereby can the holding member action errorless, does not damage, and has improved the life-span of product.

Description of drawings is as follows:

Accompanying drawing is the utility model overall structure cut-away view.

Below in conjunction with the accompanying drawing illustrated embodiment, the utility model is done further detailed description:

Valve body 1 can once be cast by cast iron or plastics, and sealing gasket 2 is made by rubber or plastic materials, and envelope is pressed in valve body 1 vertical port 13 places.Trim ring 3 inner ring chamferings 15 have been the effects that enlarge current, and the out-of-date sealing gasket 2 of washing open of current is attached to it and is arcuation on chamfering.Pushed down by trim ring 3 around the sealing gasket 2, nut 6 compresses in the valve body 1 top screw and trim ring 3 is screwed in, valve gap 8 is spun in this screw equally, be equipped with tapered bar 9, stage clip 12 on the valve gap 8 in the lid of similar hilt shape, get up through nut 11 encapsulation, tapered bar 9 can turn in nut 11 endoporus, nut 16 is fastened on tapered bar one end, do not come off to block handwheel 10, with the tapered bar 9 coaxial horizontal holes 14 that have, to consider available in case of necessity thimble top tapered bar or usefulness easy to maintenance.

When using, the water that contains certain pressure enters valve body 1 chamber from the left side, because hydraulic action makes sealing gasket 2 stressed, passes to piston 4 again, because the top of tapered bar 9 end wedging piston rods 5, thereby the hydraulic pressure piston of not opening, water just can not be from the outflow of right chamber.When water, with handwheel 10 outwards pulling make tapered bar 9 ends leave the wedge position, move up because of the pressure of water promotes piston 4, pressure spring 7, piston rod 5, sealing gasket 2 is washed open water by water and is just flowed out from right chamber.When cutting off the water, because of no hydraulic pressure, thereby promotion piston 4 makes sealing gasket 2 cover water intake under the effect of spring 7, tapered bar 9 makes the top of its front end wedge at piston rod 5 under the effect of stage clip 12 simultaneously, limited piston 4 must not move up, when making it that hydraulic pressure be arranged, water can not flow to right chamber from left chamber yet, has finished not have and has pressed the function of cutting off the water automatically.

Claims (2)

1, do not have and press the valve of cutting off the water, comprise valve body 1, sealing gasket 2, trim ring 3, piston 4, clamping nut 6, spring 7, valve gap 8, tapered bar 9, stage clip 12, it is characterized in that the upper end has vertical port 13 in the described valve body 1 flow channel water intake, encapsulation one elastic sealing gasket 2 on this port, around the pad by trim ring 3 press seals in valve body 1 on the concave station, piston 4 is contained in the trim ring 3, one spring 7 is pressed thereon, the upper end withstands in valve gap 8 inner groovies, one clamping nut 6 is screwed in the valve body 1 top inner bolt hole, trim ring 3 is compressed, and spiral cover has valve gap 8 on this screw, and valve rod 5 was gone here and there valve gap and withstood in the horizontal hole 14; Tapered bar 9 is contained in the horizontal shrinkage pool of valve gap, and stage clip 12 1 ends withstand on tapered bar 9 boss, and the other end withstands on the nut 11.

2, the valve of cutting off the water as claimed in claim 1 is characterized in that the described trim ring 3 and the inner ring of sealing gasket 2 touching positions have chamfering 15; The front end of tapered bar 9 is cone-shaped, and the rear end is equipped with handwheel 10, is connected on the tapered bar 9 through nut 16.

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