SU779708A1 - Pressure valve - Google Patents

Description

(54) PRESSURE VALVE

This invention relates to a valve industry.

A pressure valve is known, consisting of a housing, a spool and a discharge valve fl.

The disadvantage of the valve is its narrow, wide range of application., Closest to the proposed one. is a pressure valve, in the case of which, with high and low pressure cavities, a valve with a seal and a control piston are placed

The disadvantage of the valve is the complexity of the design of the device located in the cavity of a high distance. ,

The purpose of the invention is to increase / reliability of the sealing element.

The goal is achieved by the fact that the end: the housing on the high pressure side is made in the form of a guide with radial grooves interacting with the sealing element of the plunger.

FIG. 1 shows a valve, a general view of FIG. 2 - section aa in figure 1

In the valve body 1, the plunger 2 is moved with the slots 3. The plunger is provided with a sealing element 4. A coaxial plunger is mounted in the housing

the control piston 5. By the spring 6 the plunger 2 with the piston 5 is kept in the Starting position, while the high pressure cavity 7 is separated from the low pressure cavity 8 and (discharge). From the side of the high pressure cavity, the end of the body is made in the form of a guide 9 with radial points 10. The piston is driven by applying pressure to the cavity 11.

The valve operates as follows.

The working fluid from the pressure line enters the cavity 8 (resetting the pressure, the plunger 2 compresses the spring 6 and moves oleo. When the sealing element 4 enters the guide 9 through the grooves 3 and 10, the cavity 20 7 is filled with liquid. When the valve opens, the guide 9 prevents sealing element 4 from destruction by fluid flow. When the pressure drops, plunger 2 returns to its original position under the action of spring 6.

The forced release of pressure from the cavity is accomplished by applying pressure to the cavity 11.

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779708

Overcoming the force of the spring 6 and the pressure in the cavity 7, the plunger 2 moves to the left until it stops.

At the same time, work the liquid through the grooves 10 and 3 flows into the cavity 8.

When relieving pressure, plunger 2 with piston 5 returns to its original position.

invention formula

The pressure valve, in the case of which a spring-loaded are located with high and low pressure cavities

a plunger with a sealing element and a control piston, which is distinguished by the fact that, in order to increase the reliability of the sealing element, the end of the casing on the high pressure sides is designed as a guide with radial grooves interacting with the sealing element of the plunger.

Sources of information taken into account in the examination

1. USSR author's certificate number 316850, cl. E 21 D 23/16, 1970.

2. Authors certificate of the USSR W 422907, cl. F 16 K 17/00, 1972.

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Claims (1)

Claim A pressure valve with a spring-loaded plunger with a sealing element and a control piston in the casing with high and low pressure cavities, distinguishing it with a plunger that, in order to increase the reliability of the sealing element, the end face of the casing on the high pressure side is made in in the form of a guide with radial grooves interacting with the sealing element of the plunger.