CN2408319Y - Self aid on-and-off valve - Google Patents

Abstract

The utility model relates to a self operated on-off valve which comprises a valve body with a fluid in-out port and a valve cover which is connected with a flange of he valve body. The valve cover is provided with a direction selecting plug valve, and an outlet of the direction selecting plug valve is communicated with the inner cavity of the valve body. The valve body and the valve cover are provided with pressure guiding holes which are respectively communicated the fluid in-out port and the direction selecting plug valve. The inner part of the valve body is provided with an extending body of a fluid outlet pointed to the upper part of the valve body, and the extending body is provided with a flashboard. The inner part of the valve body is also provided with a piece of rubber; one side of the rubber is pressed between the valve body and the valve cover, and the other side of the rubber is fixed with the flashboard. The valve of the utility model has the advantages of novel and reasonable structure, hard abrasion and long service life. The utility model is suitable for fluid media.

Description

Automatic on-off valve

The utility model relates to a kind of valve, is specially automatic on-off valve.

Existing valve is made of the valve opening on valve body and the valve body, closing mechanism device usually, includes screw mandrel in unlatching, the closing mechanism device, finishes the opening and closing of valve by the motion of screw mandrel.Existing valve easily gets rusty owing to screw mandrel, thereby influences the working life of valve.Moreover unlatching, the long-term use of closing mechanism device easily produce and wear and tear, and cause valve seal not tight, produce weeping.

The purpose of this utility model is the defective that overcomes above-mentioned valve, and a kind of valve of new structure is provided, and is specially automatic on-off valve.

The utility model is to adopt following measure to realize: this automatic on-off valve comprises and has fluid and advance, the valve body of outlet, be provided with the fluid output extending body that points to valve body top in the valve body, the inlet of this fluid output extending body is provided with flashboard, have respectively to advance in the upper-end surface of valve body with fluid, the pressure guide hole that outlet communicates, valve body top is provided with the valve gap that connects with valve flange, valve gap middle part is provided with choosing that outlet communicates with body cavity to stopcock, valve gap and contacting of valve body have on the end face respectively with valve body on pressure guide hole match and merge and select the pressure guide hole that communicates to stopcock, simultaneously, in valve, also be provided with and be pressed on valve body on one side, between the valve gap, the rubber that another side and flashboard are fixing.Valve is according to different needs, the importer of its fluid also can be vertical mutually to can be in the same way with Way out, and the water outlet extending body in the valve is bending extension body or vertical extending body accordingly, but all need extend to the top of valve body, so that flashboard is fixing.The said structure of this valve has formed a cavity independently with flashboard top, and the hydrodynamic pressure in it changes (being called the transformation chamber) with choosing to the position of stopcock is different, thereby forms pressure reduction on the two sides of flashboard, realizes unlatching, the closure of valve.

Valve mechanism novelty described in the utility model, reasonable, not easy to wear, long service life.It is extensive to be suitable for flowing medium.

Structural drawing when Fig. 1 is a valve opening state described in the utility model;

Structural drawing when Fig. 2 is a valve closes state described in the utility model;

Fig. 3 is the plan view of Fig. 1;

Fig. 4 is the plan view of valve body;

In conjunction with the accompanying drawings the utility model is further described as follows: this automatic on-off valve comprises and has fluid and advance, outlet 1,2 valve body 3, be provided with the fluid output extending body that points to valve body top in the valve body, the inlet of this fluid output extending body is provided with flashboard 5, have respectively to advance in the upper-end surface of valve body with fluid, outlet 1,2 pressure guide holes that communicate 6,7, valve body top is provided with the valve gap 8 that connects with valve flange, valve gap middle part is provided with choosing that outlet communicates with body cavity to stopcock 10, valve gap and contacting of valve body have on the end face respectively with valve body on pressure guide hole 6,7 match merges the pressure guide hole 12 that communicates to stopcock with choosing, 13, simultaneously, in valve, also be provided with and be pressed on valve body on one side, between the valve gap, the rubber 15 that another side and flashboard are fixing.The utility model has been selected fluid inlet/outlet valve body in the same way for use, and therefore, the outlet extending body in it is the bending extension body---extend elbow 4.Fluid inlet and outlet of the present utility model is all made flange-like, is convenient to and the connecting of fluid circuit.Its working procedure is as follows: when valve is in closed condition, choosing communicates with pressure guide hole 12,6 to stopcock 10, at this moment, the transformation chamber of flashboard top communicates with fluid inlet, and rubber 15 upper and lower pressures are identical, and the pressure above the flashboard is fluid inlet pressure, be outlet pressure below, because inlet pressure is greater than outlet pressure, thereby flashboard is compressed valve closing.When needing Open valve, to select to stopcock Rotate 180 degree, it is communicated with pressure guide hole 13,7, and at this moment, the transformation chamber of flashboard top communicates with fluid output, the suffered hydrodynamic pressure in flashboard above and below is identical, and rubber above be subjected to fluid output pressure, be subjected to fluid inlet pressure below, thus with rubber 15 jack-up, the drive flashboard rises, and realizes the unlatching of valve.When needing with valve closing, to select again to stopcock Rotate 180 degree, the transformation chamber is communicated with fluid inlet, be subjected to fluid inlet pressure above the flashboard, at this moment, the continuous discharge owing to fluid below the flashboard forms a funnel shaped low pressure area, make pressure above the flashboard greater than following pressure, flashboard is depressed, made it be in closed condition, realize the closure of valve.

Claims (2)

1, a kind of automatic on-off valve, comprise and have fluid and advance, outlet (1), (2) valve body (3), it is characterized by: be provided with the fluid output extending body that points to valve body top in the valve body, the inlet of this outlet extending body is provided with flashboard (5), have respectively to advance in the upper-end surface of valve body with fluid, outlet (1), (2) pressure guide hole that communicates (6), (7), valve body top is provided with the valve gap (8) that connects with valve flange, valve gap middle part is provided with choosing that outlet communicates with body cavity to stopcock (10), valve gap and contacting of valve body have on the end face respectively with valve body on pressure guide hole (6), (7) match and merge and select the pressure guide hole (12) that communicates to stopcock, (13), simultaneously, in valve, also be provided with and be pressed on valve body on one side, between the valve gap, the rubber (15) that another side and flashboard are fixing.

2, automatic on-off valve as claimed in claim 1 is characterized by: the fluid output extending body in the valve body is the bending extension body---extend elbow (4).

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