SU806976A1 - Apparatus for suppressing hydraulic shocks - Google Patents

Description

(54) DEVICE FOR THE EXPLANATION OF HYDRAULIC

HITS 38 A device for extinguishing persons. The blows contain a bypass line I, a gate valve 2 with a hygrophilus, an electric switch 3, a 4-time relay and interlock contacts 5-11. The bypass line 1 is connected to pressure pipe sections located before and after the check valve 12. A valve 2 is installed on the telephone line ( which is connected with a pressure pipe by means of electrical fittings, Orele 3 is connected with a pressure pipeline and with an atmosphere. Electric, hydraulics 3, time relay 4 and interlock contacts 5-11 are electrically and mechanically connected to the drive motor control system and valve cylinder 2 hydraulic cylinder. The device operates as follows. The absorption of a water hammer that occurs as a result of the actuation of the check valve 12 when the pump 13 suddenly stops, is provided by having a bypass valve I with the valve 2 fully open on it. After an emergency power off or protection of the drive motor 14 by opening the contacts 5, the coil of the electromagnet 15 is de-energized and the channels of the electrodrainer 3 are switched to the water supply from the discharge pipe 16 to close the valve 2 under the action of static pressure. The duration of the complete closing of the valve is 45-6 O s. In normal operation, before stopping the pump 13 after closing the contacts 6, the shut-off body 18 with the electric actuator 19 is closed first and then through the limit switch c. end with; The cover of the organ 18 by opening the contacts 7 is automatically turned off by the driving motor 14 and at the same time the contacts 8 are closed. In this case, the channels of the electro-relay 3 are crossing / leaking to close the locking 2, but it remains open, as the water does not flow into the hydraulic cylinder 17. Since contacts 9 are closed in a closed state, in order to completely close the closure member 18, the actuator 19 is turned on to open the newly closed member 18, the block contacts 10 are open, which are disconnected when the switch is turned off. 6. To start the pump agro-ata, the contacts 20 are blocked, which are blocked by the contacts 5 after switching on the start of the bodies 21. At the same time, the electrohydraulic relay 3 is energized on the coil of the electromagnet 15, in which the channels are switched to the supply Under pressure from the pump 13 into the lower cavity of the hydraulic cylinder 17 to open the valve 2 on the bypass line I. At the moment of opening of the valve 2, its rod closes contacts 9 that turn on the electric actuator 19 to open the stop valve 18 located on the discharge line of the pump 13. An electrically operated gate valve or an electrically operated qaTBOp disk valve may be used as the locking member 18. In order for the motor 14 to not be switched off when starting up as a result of opening the contacts 7 when the limit switch is triggered on the opening valve 18, it is provided for 4 times. It starts working simultaneously with pressing the Start button and closes contacts 22., shunting contacts 7 and 8. 75-80 seconds after pressing the Start button, the relay 4 times off, opening contacts 22 and preparing the circuit to automatically turn off the electric motor 14 by a limit switch at the moment of complete closure of the closure body 18, which may occur in the situations described above / In the event of an unpredictable de-energization of the electromagnet 15 (for example, during the combustion of its coil) under conditions of normal operation of the pump 13, valve 2, when its stem moves downwards, contacts II close and the locking member 18 begins to close, at the moment when it is completely closed, the direct electric motor 14 shuts off through the limit switch, thereby eliminating the possibility of a pump 13 stopping at the closed shutter 2 on the bypass line 1, fu the formation of a water hammer when the anti-shock device is turned off is eliminated. The proposed device makes it possible to use it for hydraulic blows on automated pumping stations, preventing emptying of pressure pipelines and reverse rotation of pumping units.

Csobregen Formula

The device for hydraulics hydraulic cranking, consisting of a check valve placed on the main pipeline connected to the pump, with a check valve integrated into the bypass line, is equipped with a hydraulic control valve that is equipped with a hydraulic control mechanism, in order to improve reliability. hydraulically operated valve consists of an electro-hydraulic actuator, which is equipped with a pump, electro-hydro relay, time relay and interlocking contacts included in the control unit of an electro-hydraulic pump and mechanic Interactive interaction with the hydraulic valve stem, which is connected to the pressure line of the pump and to the atmosphere through an electro-relay.

Sources of information taken into account in the examination I. USSR author's certificate N 4362О5, cl. F 16 L 55 / 00,1969.

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Claims (1)

Claim A device for absorbing hydraulic shocks, consisting of a check valve located on the main pipeline connected to the pump, in the bypass line of which there is a valve with a hydraulic actuator rod connected to a control mechanism, characterized by a gem, which, in order to increase the reliability of operation, is a hydraulic valve control mechanism consists of an electric6 hydraulic actuator, which is equipped with a pump, an electrohydro relay, a time relay and interlocking contacts' included in the control circuit of the electrohydraulic actuator of pump 5 and a mechanical cally cooperating with the hydraulic drive rod bolt, which through elektrogidrorele connected to the pressure line and the pump to atmosphere.