SU1455058A1 - Pumping plant - Google Patents

Abstract

Invention m. B. used in hydraulic machines. The purpose of the invention is to increase the reliability of the pumping station. Three pumps 1. 2, 3 are connected by hydrolines (HL) 4, 5, 6 to pressure head CH 7. Check valves 9, 10, 11 are installed in CH 4, 5, 6. Safety valve 13 is installed in drain CH 12. The distributor 8 is made three-position with electromagnetic control. The measuring device 14 is made in the form of three flow relays 18, 19, 20 installed in CH 12 with electrocontacts 21, 22, 23, 24. The power supply 15 is connected via normally open contacts 21, 22 to electromagnet 16 and through normally open contacts 21 , 24 and normally closed contact 23 with an electromagnet 17. Distributor 8 is connected with its inputs 25, 26 h. CH 5, 6 and inputs 27, 28 to pressure head G,; and drain CL 12 between relays 18, 19. 1 and .. 7 i SL cd SP about cd 00

Description

i The invention relates to mechanical engineering. Hydraulics and can be used in hydraulic machines. The purpose of the invention is to increase reliability.

The drawing shows a constructive scheme of the pumping station.

: The pumping station contains at least three pumps 1.2. and 3, connected hydrolines Z1., 4, 5, and b to pressure line 7, distributor 8, check valves 9, 10 and L installed in hydraulic lines 4, 5 and 6, drain valve 12 with installed safety valve 13 and measuring device 14, and it is equipped with an electric power source 15, the distributor is filled with three-position control electromagnets: 16 and 17, the measuring device 14 is made in the form of three successively installed 18 in the discharge hydraulic valve 12 relay 18, 19 and 20 with electro- | |) contacts 21 - 24.

I The power supply source 15 is connected via the normally open contacts 2 and 22 of the first 18 and | the second 19 flow switch with the electromagnet 16 distributor 8 and through normal open contacts 21 and 24 of the first 18 and third 20 flow switches and the normally closed contact 23 of the second flow switch 19 with an electromagnet 17 of the distributor 8, and the distributor 8 is connected by its inputs 25 and 26 to hydrolines 5 and 6 of the second 2 and third 3 pumps, and outputs 27 and 28 to the aaorine hydroline 7 and drain hydroline H between the first 18 and second 19 relays. huda

: The flow switch 18 is set to the minimum allowable flow rate at the drain, the relay 19 of the flow rate is set to the flow rate of pump 2 (Qg); flow switch 20 - to pump 3 flow (Qa) The pumping station operates as follows.

 in the neutral position of the distributor 8, the pumps 1, 2 and 3 are connected to the pressure line 7 and the entire flow of the working fluid flows to the consumer.

1 Consumer requested flow Q Qi + Q3.

At the drain there is a flow of working fluid, and the flow switches 18, 19 and 20 are triggered. The contacts 27, 22 and 24 are closed, and the contacts 23 are open, the solenoid 16 of the distributor 8 is turned on. The distributor is positioned at which the pressure head 6 of the pump 3 is connected to the pressure line 7 of the station, and the head 5 of the pump 2 through the relay 19 and 20 consumption from

0

15

20

25

thirty

40

45

50

is combined with a drain, i.e. pump 2 is discharged. After switching the distributor, auto-oscillations do not occur, as the flow of working fluid Q.Qy continues to flow through the flow switches 19 and 20.

2. The consumer has requested consumption Q Q. + Q2 ..

At the drain is the flow of working fluid, this triggered the relay 18 and 20 flow. Contacts 21, 23 and 24 are closed, contacts 22 are open. The solenoid 17 is turned on. Distributor 8 is placed at the position at which pump 2 is discharged, and the flow of pump working fluid is directed to the discharge line 7 of the station.

3. User requested Q flow.

Qi + Q2.

A flow Q Qa is flowing to the drain. If one of the electromagnets 16 or 17 is turned off, then the flow of working fluid Q QMHH begins to flow through relay 18. The flow switch 18 opens the contacts 21, which leads to de-energizing the electromagnets 16 and 17. All three pumps supply the working fluid to the pressure line 7 of the pumping station.

Claims (1)

Invention Formula A pumping station containing at least three pumps connected hydraulically to a pressure line, a distributor, check valves installed in the hydrolines, a drainage link with a safety valve installed in it, and, in order to increase reliability, it it is supplied with a power source, the distributor is three-position with electromagnetic control, the measuring device is made in the form of three relays installed in the drain hydraulic line An electrode with electrocontacts, the power supply being connected through the normally open contacts of the first and second flow switches to one of the distributor electromagnets and through the normally open contacts of the first and third flow switches and the normally closed contact of the second flow switches to the other solenoid distributors; to the hydrolines of the second and third pumps, and the outputs to the pressure lines and drain lines between the first and second flow switches.