SU1640402A1 - Hydropneumatic impact tool - Google Patents

Abstract

The invention relates to mountain promet, namely, impact devices for the destruction of rocks. The purpose of the invention is to increase the reliability of the device by ensuring the smooth adjustment of the impact energy. In the housing (K) 1 of the device, there are piston-block 3, control 10 and shut-off 13 piston-valves and distributor 6. Control piston-valve 10 is spring-loaded relative to K 1 by spring 11, Piston-head 3 forms K1 chamber 4 forward travel with battery 2 and reverse camera 5. The check piston valve 13 forms with K 1 a control chamber 14. The control piston-valve 10 forms a piston chamber 9 to 1. The back-up chamber 5 is connected via a distributor 6 to a pressure 7 or a drain 8 main. The forward running chamber 4 is in communication with the camera 14 and the camera 9 connected through the valve 15 to the drain line 8. The device is re-adjusted in the direction of increasing the impact energy by pressing the spring 11, and in the direction of decreasing the impact energy by decreasing the compression of the spring 11 and decreasing . the pressure in the chambers 4 and 9 due to their communication through the valve 15 with the drain line 8. 1 Il. with s

Description

-nineteen

about

4 O -N O GO

The invention relates to the mining industry, namely to impact devices for the destruction of rocks,

The purpose of the invention is to increase the reliability of the device by providing the possibility of smooth adjustment of the impact energy.

The drawing shows the device.

The percussion device includes a housing 1 in which an energy battery 2 is placed, with a gas cavity, a piston head 3, which forms a forward stroke chamber 4 with the housing V, charging chamber 5 connected by a distributor 6 with a pressure 7 and drain 8 line mi The forward stroke chamber 4 is hydraulically connected to the piston chamber 9. In the housing 1 which forms the piston chamber 9 forming the piston chamber 9, there is a control piston-valve 10 connected by a spring 11c with an adjustment device 12. The check piston valve 13 forms a control chamber 14 with the housing. Piston chamber 9 is connected to a drain line by means of a valve 15, which is mechanically connected to piston 10 by means of a piston 10, Chambers 9 and 14 are connected to chamber 4 by chamber 17, and chamber 19 is connected to pressure port 7 by cannula 19 7. Channel 20 to throttle 21 connects chamber 22 to channel 19. Chamber 23 is connected to drain line 8.

The device works as follows.

8, in the initial position, the switchgear 6 connects the backstop chamber 5 to the drain line. When supplying the working fluid under pressure to the pressure line 7, it enters the chamber 19 through the channel 19 and, acting on the piston valve 13, moves it to the right (according to the drawing). At the same time, fluid from channel 19 through channel 20 also enters chamber 22 and, acting on the control valve-piston 10, also moves it to the right. From the chamber 22, the liquid enters the chamber 23 through the valve and then into the drain line 8, since the throttle 21 is installed in the channel 20, then with the control valve-piston 10 (right position) open, the pressure s of the chamber 22 is lower than the pressure in the chamber 18 and the valve The piston 13 is held in the right position. This ensures the flow of fluid from chamber 18 into chamber 14 and further along channel 17 into chamber 4 of forward travel. The fluid entering the chamber 4 of the forward stroke gradually compresses the gas in the accumulator 2 and the pressure in the forward stroke chamber 4 increases, and consequently, the pressure in the piston chamber 9 increases.

The control valve-piston 10 on, begins to move to the right, compressing the spring 11 until, until it is on the saddle, blocking the access of fluid from the chamber 22

into the chamber 23. At the same time, the discharge of fluid from the chamber 22 into the drain line stops, which leads to an increase in pressure in the chamber 22 to a pressure in the pressure line 7. As a result of the fact that the area of the piston surface of the valve-piston 13 from the side of the chamber 22 is greater, than from the chamber 18 side, the valve-piston 13 moves to the left and sits on the seat, thereby blocking the access of fluid from the chamber 18 to the chamber 14

5 control and further into the camera 4 forward stroke. Hydro-pneumatic percussion device is ready for operation.

The working cycle of the device starts when the distributor 6 is turned on.

0 the working fluid begins to flow into the chamber 5 of the reverse stroke and the piston-head 3 makes a reverse stroke. At the end of the reverse stroke, the piston head 3 stops, and the distributor 6 connects the return stroke 5 with the drain line 8. At this moment, the force acting on the piston head 3 in the chamber 4 from the side of the energy accumulator 2 becomes greater operating from the side of the camera 5. Under

0 by the action of pressure from the chamber 4 of the forward stroke, the piston head 3 begins to make a forward stroke. As the nipple 3 begins to move, the pressure in chamber 4 decreases and battery 2 begins

5, displacing fluid from the hydraulic cavity, providing a forward stroke of the piston-bushing 3. At the end of the forward stroke, the piston-striker 3 strikes and stops. At this point, the distributor B switches off and the working fluid 5 begins to flow into the forward stroke chamber. Duty cycle repeats. When meeting with rock areas of greater strength, it is necessary to increase the impact energy. it

5 is achieved as follows. The adjustment device 12 produces additional compression of the spring 11, which causes the control piston valve 10 to move and fluid from chamber 22 through chamber 23 and drain line 8 is displaced. The force acting on the shut-off piston valve 13 on the side of chamber 22 becomes less than from the side of chamber 18, and it moves, ensuring the supply of fluid from chamber 18

5 into chamber 14 and further along channel 17 into chamber 4 of the forward stroke.

The fluid entering the chamber 4 of the forward stroke gradually compresses the gas in the accumulator 2 and the pressure in the chamber 4 of the forward stroke increases and, consequently, the pressure in the piston chamber 9 increases. The control valve-piston 10 begins to move to the left, pressing the spring 11 until the seat is no longer on the saddle and fluid from chamber 22 into chamber 23 is stopped. Since the surface area of the locking lip-valve 13 on the side of the chamber 22 is larger than the piston 11 area on the side of the chamber 18, the stop piston-valve 13 moves to the left, blocking the access of liquid from the chamber 18 to the control chamber 14, and further along channel 17 to the chamber 4 forward move. Hydropneumatic percussion device is ready to work on more durable rocks.

When meeting with softer rocks, it is necessary for the adjusting device 12 to reduce the compression of the spring 11 and, by opening the valve 15, reduce the pressure in the chambers 9 and 4, informing them temporarily with the drain line 8. Then the control piston-valve 10 moves to the right, closing valve 15. Moving the control piston valve 10 leads to connecting the chamber 22 to the drain line 8, reducing the pressure in the chamber 22 and moving the shut-off piston - valve 13 to the right. Fluid from chamber 18 begins to flow through channel 17 into chamber 4 of forward travel, and the pressure in it begins to increase. Increasing the pressure causes the control piston-valve 10 to move to the left and the spring 11 to compress. Since the spring 11 has been pre-compressed due to the adjustment of the device 12, the control valve 10 sits on the seat at a lower pressure in the piston chamber 9, and consequently, in the chamber 4 of the forward stroke.

When the piston valve 10 is seated on the saddle, the discharge of fluid from chamber 22 stops and the pressure in it increases as fluid enters chamber 22 through cannap 20 through throttle 21. Shut-off valve 13 moves to the left and sits on the saddle, stopping the access of fluid from camera 18 to camera 4 of the forward stroke. The device is ready for operation to destroy weaker rocks. Reducing the impact energy is provided by reducing the speed of the piston-blow 3, which is determined by the magnitude of the stroke and the force accelerating it, since the piston stroke of the strike arm 3 does not change, and the force accelerating it and pressure-dependent in chamber 4, the forward stroke is reduced, the impact energy of the hydropneumatic device is reduced. This prevents the piston-hammer 3 from colliding with the device parts when the rocks of any fortress are destroyed, while maintaining high productivity of work.

Claims (1)

Invention Formula A hydropneumatic percussion device, comprising a housing, which forms a return stroke chamber with the piston-bike, connected through a distributor to a pressure or drain lines, and a forward stroke chamber, having an energy accumulator and communicating with the control valve of the closing piston-valve, and a valve , characterized in that, in order to increase the reliability of the device operation by providing the possibility of smoothly adjusting the impact energy, the device is equipped with a control piston valve installed in the housing and forming there is a piston chamber in communication with the forward stroke chamber and connected through a valve with a drain line.