SU875164A1 - Apparatus for suppressing hydraulic shock - Google Patents

Description

(54) DEVICE FOR EXTING HYDRAULIC IMPACT

I

The invention relates to pipe fittings and can be used to protect the discharge piping of pumping stations from hydraulic shocks.

A device for hydraulic shock suppression is known, comprising a valve installed on a line with a hydraulic actuator connected by pipes to a check valve, in the plate of which a hole 1 is made.

The known device has a low degree of damping of the water hammer, it is unreliable, since the check valve is located outside the line and there is no smooth actuation of the valve during the manufacture of the return wave, through the opening of the check valve.

The purpose of the invention is to provide an effective hydraulic shock and increase reliability.

The goal is achieved by the fact that the check valve is located in the line behind the valve, and the working cavities of the piston hydraulic actuator are connected by pipes C to the line and the valve and after the check valve.

The drawing schematically shows the invention.

The device is a series-connected gate valve with a piston hydraulic actuator 1 and a check valve 2, on the plate 3 of which holes are drilled. The working cavity of the hydraulic drive is connected to the pipeline 4 by means of tubes 5 and b, having valves 7. and 8.

Before starting the pump water through the tube 5 enters the piston of the cylinder, raising

10 it and thereby opening the valve hydraulic drive. At the same time, the check valve 2 opens and water enters the line 4.

When the power supply to the motor of the pump is turned off, the water in line 4 after some time under the action of static pressure begins to move in the opposite direction, closing the plate 3 of the check valve.

When the check valve is closed, the por 20 of the hydraulic actuator is lowered under the action of the resulting pressure drop and an automatic overlap of the main takes place and thereby prevents the main from emptying, closing the hydraulic actuator valve.

Hydraulic shock suppression is achieved by passing water through the holes of the non-return valve plate.

Claims (1)

Invention Formula A device for hydraulic shock suppression, comprising a gate valve with a hydraulic piston placed on the line, connected by pipes with a reverse a valve with a hole in the plate, characterized in that, in order to ensure effective water hammer and increase reliability, the check valve is located in the line behind the valve and the working cavities of the piston hydraulic actuator are connected to the line before the valve and after the valve. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 82343, cl. F 16 K 47/10, 1949.