SU1124151A1 - Device for damping hydraulic shocks - Google Patents

Abstract

A DEVICE FOR SUBSTITUTING HYDRAULIC PUNCHES, which includes a drain chamber in the discharge pipe with a check valve and a drain valve in the form of a reinforced elastic diaphragm, which divides the drain chamber into the working cavity and the backpressure chamber connected to the protected pipeline through a choke, which is that, in order to increase reliability, the choke is expanded in the form of a membrane valve, the seat of which has a toroidal surface with radial grooves, and along the peripheral part of the membrane are holes. (L tN5 lu ate 78 /

Description

The invention relates to an armature structure and is intended to protect the main pipelines of the irrigation and water supply systems from hydraulic shocks arising from the sudden shutdown of the pumps, and can be used on the check valve bypass line. A device for damping a hydraulic impact is known, consisting of a working chamber made in the form of a closed volume, one of the walls of which is a diaphragm with a throttle connecting the inner strips of the chamber to the readable pipeline CI. The disadvantage of this device is that it is intended. for damping water hammer starting only with a reduced pressure wave. The closest to the proposed technical essence and the achieved result is a device for damping hydraulic shocks, which includes a drain chamber installed on the discharge pipe with a check valve with a drain valve in the form of a reinforced elastic diaphragm, which divides the drain chamber into the working cavity and the back counter chamber: lazy wired through the choke C2l. The disadvantages of the known device are the complexity of the drive device and the same resistance of the throttle when the drive moves in the forward and reverse directions, which reduces speed and reliability. The purpose of the invention is to increase the reliability of the device. This goal is achieved by the fact that in the device, which includes a drain chamber installed on the pressure pipe with a check valve, with a drain valve in the form of a reinforced elastic diaphragm, which divides the drain chamber into the working cavity and the backpressure chamber, the throttle is made in the form of a membrane valve, the seat of which plays toroidal a surface with radial grooves, and holes are made on the peripheral part of the membrane. Fig about 1 shows the device, a general view; in fig. 2 - section of the throttles when the fluid moves in the forward direction; in FIG. 3, the same. when the fluid moves in the opposite direction. The device (Fig. 1) consists of a drain chamber 1 with a drain valve located inside it in the form of a reinforced elastic diaphragm 2, and it has a drain chamber against the counterpressure chamber 3 and a working cavity 4. The counterpressure chamber 3 is connected through a throttle 5 with a pulse tube 6 with a portion of the discharge pipe 7, which is equipped with a check valve 8. The working cavity 4 of the housing Ibc is connected with the pipeline 7 to the check valve 8 bypass line 9. The throttle 5 (figs, 2 and 3) is filled in the form of a diaphragm valve 10, the saddle of which has a toroidal surface 11 with radial grooves 12. Between the valve seat 10 and the lip 13 there is a diaphragm 14 with openings 15 that are formed on its peripheral part. The device operates as follows. When the pump is operating, the fluid flow opens the check valve 8 of the pipeline 7 and simultaneously enters the working cavity 4 of the discharge chamber 1. Through the impulse tube 6 and the throttle 5 the liquid enters the backpressure chamber 3, the diaphragm 14 due to the pressure difference in the pipeline 7 and the backpressure chamber 3 is applied to toroidal seat II (Fig. 2), and the liquid is throttled only through the openings 15 of the membrane 14 and the radial grooves 12. Due to the fact that the pressure in the backpressure chamber 3 is less than the pressure in the working cavity 4 by the amount of sweat on the non-return valve 8, the resultant C1-III applied to the reinforced elastic diaphragm 2 will be directed upwards (to open it), the diaphragm 2 is raised, opening the path of the fluid through the bypass line 9 of the non-return valve 8. Opening the diaphragm 2 is provided for due to the use of throttles 5, when the diaphragm 2 is moved to the open position, it displaces about the maximum amount of fluid from the backpressure chamber 3 through the throttle 5 (fig. 3). Increasing the number of b, camera-3 provides movement. the membrane 14 up (Fig. 3), which reduces the hydraulic resistance

3112А1

Drossel 5, as the liquid immediately expires through the holes 15. The open position of the diaphragm 2 is maintained when the pump is running.

If the pump is suddenly turned off, the direction of flow of the liquid changes to the opposite after a certain period of time, which causes the check valve 10 8 to close. Since the diaphragm 2 is open by this time, the liquid passes through the control line 9 reducing the amount of water hammering. Che51

through the throttle 5 along the grooves 12 (fig. 2) the liquid enters the backpressure chamber 3 and after some time determined by the flow characteristic of the throttles 5, it sets a pressure equal to the pressure in the pipeline 7. Since the pressure in the working cavity 4 is less than the pressure in chamber 3, the diaphragm 2 closes the drain chamber 1.

The technical and economic effect of the proposed device is to increase the reliability of its operation.

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Claims (1)

GUIDENCING DEVICE RAVLICHESKII SHOCKS, including a drain chamber mounted on a pressure pipe with a non-return valve, with a drain valve in the form of a reinforced elastic diaphragm dividing the drain chamber into a working cavity and a backpressure chamber connected to the protected pipeline through a throttle, which is due to the fact that , in order to increase reliability, the throttle is made in the form of a membrane valve, the seat of which has a toroidal surface with radial grooves, and holes are made along the peripheral part of the membrane. FROM FIG. 1 SU „1124151