SU1553724A1 - Hydraulic drive of mine car pusher - Google Patents

Abstract

The invention relates to mining equipment, in particular to hydraulic pushers (T) designed to move the mine cargo carriages. The goal is to increase the efficiency of operation T by providing a braking and stopping of the train in any intermediate position when shutting down T. The hydraulic drive T of the mine carriages includes a pressure line 1 communicated through the valve 2 with the end valve (GR) 3 with piston cavities of two hydraulic cylinders (HZ) 4, 5. The rods of the latter are connected with sliders T 6, 7 with pushing 8 and 9 and holding fists 10, 11. The rod cavities of HZ 4, 5 communicate with each other by intermediate hydraulic line 12 with piston cavities through the return Valves 13, 14. Additional intermediate hydrolines 15 with hydrothrottles 16 communicate with intermediate hydrolines 12 by means of additional GR 17, the control line 18 of which is connected to pressure line 1. Working fluid from pressure hydroline 1 through GR 2 enters the rod cavity HZ 4 and through control line 18 into the control cavity of the GR 17. The HZ 4 rod extends through a duty cycle. After the drive is switched off, the pressure in the hydrolines 1 and 18 drops, the GR 17 includes an additional intermediate hydroline 15 with a hydrothrottle 16. System T - the composition comes to a standstill. 1 il.

Description

The invention relates to mining equipment, specifically to hydraulic / hydraulic push rods with reciprocating movement of the hydraulic actuating bodies intended before the movement of the mine freight cars.

and unloading points and mines.

The purpose of the invention is to increase the efficiency of the pusher operation by providing a braking effect and stopping the train in any intermediate position when the pusher is disengaged.

The drawing shows the hydraulic drive pusher.

The hydraulic actuator contains a pressure hydraulic 1, communicated through a hydraulic distributor 2 with an end hydraulic distributor 3 with piston cavities of two hydraulic cylinders 4 and 3, the rods of which are connected to sliders 6 and 7 of the pusher with pushing 8 and 9 and holding 10 and 11 cams.

Rod cavities of hydraulic struts 4 and 5 are interconnected by intermediate hydroline 12, with piston cavities through check valves 13 and 14. In addition, additional intermediate hydroline 15 with hydraulic throttle 16 communicates with intermediate hydraulic line 12 using an additional hydraulic distributor 17, control line 18 which communicated with the pressure hydroline 1.

The pusher works as follows.

The working fluid, which enters the pressure hydraulic line 1 through the hydraulic distributor 2, enters the rod

0

five

0 5

Q

with

0

five

the cavity of the hydraulic cylinder 4 and through the control line 18 - into the control cavity of the additional hydraulic distributor 17. The rod of the hydraulic cylinder 4 extends, making a working cycle.

The liquid willow rod cavity of the hydraulic cylinder 4 through the intermediate hydroline 12 enters the rod cavity of the hydraulic cylinder 5, returning its rod to its original position. Compensation of fluid leaks from the stem cavities is carried out with the hydraulic cylinder 4 stem advanced through the non-return valve 13. This scheme ensures a reliable return of the hydraulic cylinder 5 stem to its original position. After that, the slider 7 acts on the limit valve of the hydraulic distributor 3, and the working fluid through the hydraulic distributor 2 begins to flow into the piston cavity of the hydraulic cylinder 5, actions similar to those indicated are performed

After the drive has been switched off, the pressure in the hydrolines x 1 and 18 drops, the hydraulic distributor 17 turns on an additional intermediate hydroline 15 with a hydraulic choke 16 between the rod cavities of the hydraulic cylinders 4 and 5 instead of the intermediate hydroline 12.

The pusher system - the composition comes to a standstill until its stock of kinetic energy is quenched with the help of throttles 16.

When the pusher is disengaged in any intermediate position, this structure brakes the train until it stops completely. When relieving pressure from a pressure line

the control valve switches the intermediate hydroline to the choke. The pumping of fluid from the rod end is performed with throttling, and the ram with the composition stops.

Thus, the proposed design allows not only variable hydroline communicated with piston cavities of hydraulic cylinders through a hydraulic valve and intermediate hydraulic line communicated with rod stocks and through check valves with piston cavities of hydraulic cylinders, characterized in that, in order to increase efficiency .

To ensure the composition of the carriages under loading JQ is by providing a braking effect and stopping the composition in any intermediate position when the pusher is disengaged, it is equipped with an additional intermediate hydroline with a hydraulic throttle connected to the intermediate line by means of an additional control valve, the control line of which is connected to the pressure line hydroline.

point, but also to slow it down when relieving pressure. This allows for a more metered loading of the trolleys and an increase in the efficiency of the pusher operation.

Claims (1)

Invention Formula The hydraulic drive of the mine trolley pusher, which includes pressure springs by providing a braking effect and stopping the composition in any intermediate position when the pusher is disengaged, is equipped with an additional intermediate hydraulic line with hydraulic throttle connected to the intermediate line through an additional hydraulic distributor, the control line which is connected to the hydraulic head. .