RU76414U1 - CRIMPED AIR VALVE - Google Patents

Abstract

A utility model for a shut-off pneumatic valve is designed for shut-off valves, in which air is used to pneumatically control the flow of the working medium through the pipeline. The pneumatic valve comprises a housing, a locking element, a stem, a return spring, a pneumatic actuator including a cup with a piston connected via a rod to the locking element, a sealing collar and a stop. To increase the service life and increase reliability, a shock absorber is inserted in the pneumatic valve located in the glass between its bottom and the limiter, with the possibility of elastic deformation, the return spring is located in the cavity of the valve body, and the valve shutter is formed by the end surfaces of the conical shape of the locking element and the body. 3 s.p. f-ly, 1 ill.

Description

The shut-off pneumatic valve is designed for shut-off valves, in which air is used to pneumatically control the flow of the working medium through the pipeline.

Known shut-off valves, a characteristic feature of which is the speed provided usually by the operation of the spring at the time of closing the valve. The spring is cocked by a pneumatic actuator. The type of action of this valve equipped with springs is NC (normally closed). The shut-off valves are single-seat, two-seat, straight-through and angled, with a diaphragm and piston pneumatic actuator (see, for example, Gurevich D.F., Zarinsky ON, Kuzmin Yu.K. Armature reference book for gas and oil pipelines - L .: Nedra, 1988, p.115).

Known pneumatic valves of this type have an insufficient service life due to the rapid wear of the locking element.

The closest analogue, selected as a prototype for the maximum number of matching features, is a valve company GSR Ventiltechnik GmbH & Co.KG, () containing a housing, a locking element connected by a rod to the piston; return spring, pneumatic actuator. A fitting for supplying a control medium is located on the housing of the pneumatic actuator.

Common features of the prototype with the proposed technical solution are a housing, a locking element connected by a rod to a piston; return spring, pneumatic actuator.

The main disadvantage of the pneumatic valve adopted for the prototype is the lack of service life.

The problem to which the proposed technical solution is directed is to increase the reliability of the valve and increase its service life.

To solve this problem, a shut-off pneumatic valve containing a housing, a locking element, a rod, a return spring, a pneumatic actuator including a glass with a piston connected by a rod to the locking element, a sealing collar and a stopper, is introduced with a shock absorber located in the glass between its bottom and a limiter, with the possibility of elastic deformation, the return spring is located in the cavity of the valve body, and the valve shutter is formed by the end surfaces of the conical shape of the locking element and the body.

The introduction of new features made it possible to eliminate the shock load on the pneumatic actuator piston and reduce the wear of the locking element, which led to an increase in the service life of the pneumatic valve and an increase in its reliability.

The drawing shows a General view of a pneumatic valve.

The pneumatic valve consists of the following main parts and assemblies: the housing 1, the locking element 2, the return spring 3 located in the cavity of the housing 1, the pneumatic actuator consisting of the nozzle 4, the piston 5, the sealing sleeve 6, the limiter 7, the shock absorber 8 located between the limiter 7 and the bottom of the cup 4. On the cup 4 of the pneumatic actuator there is a fitting 9 for supplying a control medium. The locking element 2 is connected by a rod 10 to the piston 5. The end surfaces of the locking element 2 and the housing 1 are conical and form a shutter.

The pneumatic valve operates as follows. The working medium is fed into the cavity (1). In the initial state, the valve is closed. The tightness of the shutter is ensured by pressing the locking element 2 against the housing 1 by the spring 3 and the pressure of the working medium. When applying a control medium with excess pressure to the cavity (2) of the pneumatic actuator, the piston 5 moves up to the stop of the limiter 7 into the shock absorber 8, compressing the return spring 3, and

lifts the locking element 2. The cavities (1) and (2) of the valve are in communication. The valve is open. When the overpressure of the control medium is removed from the cavity (3), the locking element 2, under the action of the force of the return spring 3, moves down, stopping the communication of the cavities (1) and (2) of the valve. The valve is closed.

Thanks to the introduction of the shock absorber and the conical shape of the shutter, it was possible to increase the number of cycles of the pneumatic valve to 5x10 ⁶ , thereby increasing its reliability.

A search was conducted for the VTBF funds to identify similar technical solutions. No solutions matching the distinguishing features were found, on the basis of which it was concluded that the claimed technical solution meets the criterion of the utility model “novelty”.

Claims (3)

1. Shut-off pneumatic valve comprising a housing, a locking element, a rod, a return spring, a pneumatic actuator including a cup with a piston connected by a rod to a locking element, a sealing collar and a stopper, characterized in that a shock absorber located in the cup is inserted into it, between its bottom and the limiter, with the possibility of elastic deformation. 2. The shut-off pneumatic valve according to claim 1, characterized in that the valve shutter is formed by the end surfaces of the conical shape of the locking element and the housing. 3. The shut-off pneumatic valve according to claims 1 and 2, characterized in that the return spring is located in the cavity of the valve body.