SU804988A1 - Device for suppression of hydraulic shock - Google Patents

Description

The invention relates to energy absorbers, in particular to devices for damping water hammer.

A device for extinguishing a hydraulic or hydraulic shock is known, in which the outlet pipe is blocked by a membrane and an air cushion is formed in the subvalvular cavity of the main valve [1].

However, this valve is designed to extinguish water hammer, starting with high pressure, and is difficult to manufacture.

A device is known for quenching a water hammer, in the housing of which there is a working chamber, one of the walls of which is made in the form of an elastic diaphragm overlapping the discharge pipe of the protected pipeline, and windows are made connecting the submembrane cavity with an atmosphere of £ 2j.

However, this valve is designed to extinguish water hammer, starting with both low and high pressure in the pipeline, and also has a complex structure.

The purpose of the invention is to simplify the design and ensure speed. Wii operation.

This goal is achieved by the fact that the working chamber is made in the form of a closed volume, and the diaphragm is equipped with a throttle hole connecting the inner cavity of the chamber with the pipeline.

The drawing shows a diagram of the proposed device.

In the housing of the device there is a camera 1 made in the form of a closed volume (cavity), one of the walls of which is made in the form of an elastic diaphragm 2 with a throttle hole

3, overlapping discharge pipe

4, and windows 5 are made connecting the submembrane cavity with the atmosphere.

The device operates as follows.

When the transported medium passes under pressure through the pipeline, pressure of the same magnitude is created in cavity A. Since the diaphragm’s area on the side of cavity A is more effective, it closes the discharge pipe. When a continuous flow of the transported medium ruptures, two diverging flows are formed, as a result of which a vacuum is created in the pipeline. Due to the difference in the working areas from the side of cavity A and the discharge pipe 4, the diaphragm 2 rises under the influence of atmospheric pressure from the side of the windows, connecting the internal cavity of the pipeline with the atmosphere. Air will flow into the pipeline until the flows stop and start moving towards each other. Air begins to be displaced into the atmosphere and compressed by the liquid creates excess pressure. The same pressure will be created in the cavity _j A, as a result of which the diaphragm 2 will block. discharge pipe 4. Due to air compression in the pipeline, the fluid flows are inhibited and their kinetic energy is extinguished.

Claims (2)

This invention relates to energy absorbers, namely, water hammer damping devices. A device for damping a water hammer is known, in which the discharge patrubo is blocked by a membrane, and an air cushion 1 is formed in the subvalvular cavity of the main valve. However, this valve is designed to extinguish the water hammer starting from the overpressure and is difficult to manufacture. A device for damping a hydraulic shock is known, in the case of which a working chamber is placed, one of the walls of which is made in the form of an elastic diaphragm blocking the discharge port of the protected pipeline, and windows are made connecting the membrane membrane with the atmosphere 2. However, this valve is intended to dampen hydraulic shock, start both with reduced and with subsurface pressure in the pipeline, and also has a complex structure. The purpose of the invention is to simplify the design and ensure fast response. This goal is achieved by the fact that the working chamber is filled in the form of a closed volume, and the diaphragm is provided with a throttle opening connecting the internal cavity of the chamber with the pipeline. The drawing is a diagram of the proposed device. The device 1 contains a chamber 1, made in the form of a closed volume of a volume (cavity), one of the walls of which is made in the form of an elastic diaphragm 2 with a throttle bore 3 overlying the discharge nozzle 4, and windows 5 are made connecting the submembrane cavity with the atmosphere. The device works as follows. When a conveyed medium passes under pressure through a pipeline, a pressure of the same magnitude is created in cavity A. Since the effective area of the diaphragm on the side of cavity A is greater, it overlaps the discharge nozzle. When a continuous stream of transported medium is broken, two divergent streams are formed, resulting in vacuum is created in the pipeline. Due to the difference in the working area from the side of the cavity A and the discharge pipe 4, the diaphragm 2POD rises by the action of atmospheric pressure from the side of the windows 5, connecting the internal cavity of the pipeline to the atmosphere. Air will flow into the pipeline until the flows stop and begin to move towards each other. The air will begin to be forced out into the atmosphere and the fluid being compressed will ripen the excess pressure. The same pressure will be created in cavity A, as a result, diaphragm 2 will overlap. discharge pipe 4. Due to the compression of air in the pipeline, the fluid flows are inhibited and their kinetic energy is quenched. Apparatus of the Invention A hydrocooler is used for suppressing a housing chamber with one wall of which has the form of an elastic diaphragm blocking the discharge pipe of the protected pipeline, and windows that connect the submembrane cavity with an atmosphere characterized in that simplify the design and provide quick response; the chamber is designed as a closed volume, and the diaphragm is provided with a throttle orifice connecting the internal cavity of the chamber with the pipeline. Sources of information taken into account in the examination 1. The author's certificate of the USSR 495498, class, F 16 C 55/02, 1973. 2. USSR Author's Certificate No. 508631, cl. F 16 C 47/00, 1972.