SU962458A1 - Hydropneumatic percussive apparatus - Google Patents

Description

The invention is related to construction and is intended for the sinking of piles, grooves and similar elements, as well as for soil compaction in cramped conditions and the destruction of asphalt concrete and concrete road pavements.

A hydraulic percussion device is known, comprising a cylinder, a piston with a rod, and a two-stage spool valve 1.

In the known device When the spool is moved to a position corresponding to the stroke of the striker, the pump capacity is not fully used, since a part of the liquid is poured through the throttle installed in the line that communicates the control cavity with the output channel, which leads to an increase in the switching time and most and reduce the frequency of strokes. In addition, the hydraulic percussion device does not allow energy to be changed. giju blow in the process.

It is also known a hydropneumatic percussion device, including a housing with radial channels, a piston-die, which separates the housing on the platoon and drain cavities, a control unit with a spring-loaded slide valve, an accumulator, an impact energy control mechanism, HanopHsno and a drain line 2.

The known device makes it possible to change the impact energy by changing the stroke of the piston stroke, however, to do this, it is necessary to stop the operation of the device and adjust it to a specific mode, which significantly reduces its performance and efficiency.

15

The purpose of the invention is to improve the performance and efficiency of the impact device.

This goal is achieved by the fact that in the hydropneumatic shock

20 a device comprising a housing with radio channels, a piston-firing pin separating the housing on the platoon and drain cavities, a control unit with a spring-loaded slide valve, an accumulator,

25, the impact energy control mechanism, the pressure and discharge lines, the impact energy control mechanism is made in the form of a multi-position cylindrical gold cube installed between the radial channels communicating with the drain cavity and the drain line, the drain line connecting with the central cavity of the slide valve and on its side surface there are pass-through windows displaced in the vertical and horizontal planes relative to each other, in order to connect the corresponding radial channel This means that the control unit is connected to the platoon cavity {pilot channel with a length equal to 1-1.5 of its diameter. The drawing shows a hydropneumatic percussion device, a general view. The device consists of a housing 1, a piston, a block 2, a control block 3 with a spool 4 and a spring 5, a piston block 2 separates the housing 1 into a cavity 6 of the platoon 7 drain and accumulator torus 8, filled with compressed time. The charging cavity b is connected to the pressure line 9 through the hydroaccumulator 10, made in the form of an elastic pipe, and the radial channel 11, and to the drain line 1 by means of a check valve 13 and channel 14. In the control unit 3, e & spool cavity 15 is connected to drain line 12 through channel 16 and pipeline 17. In control block 3, control cavity 18 is located, which connects to drain cavity 7 via radial channel 19, and to bladder cavity b - through valve 4 and radial channel . 20, whose length is 1-1.5 times its diameter. The housing 1 of the drain cavity 7 has radial channels 21 located at different levels and connected to the drain line 12 via a multi-position cork cylindrical spool 22, on the side surface of which there are passage openings 23 displaced in the vertical and horizontal planes from Kocs- srcvbHO each other, to connect the corresponding radial channel with its central cavity, which is connected to the drain line 12. The number of openings 23 is equal to the number of radial channels 21 and is selected depending on The number of steps for adjusting the impact energy of a hydropneumatic percussion device is shown in the drawing with a device with three steps of adjustment). The windows 23 may alternately co-operate with the respective channels 21 by turning the cork cylindrical spool 11 22 adjusted around the axis. The drain radial channels 21 in the housing 1 are designed so that the rightmost drain channel is cut off from the cavity 7 by the right side of the piston 24 piston-bounce 2 at the end of idling, corresponding to the maximum impact energy, and the location of the other drain channels .21 the values of the strokes of the piston-strike 2, which provide for obtaining lower impact energies, corresponding to the steps. The device operates in the following manner. In the absence of a static press on the device from the side of the working tool, the piston head 2 is in the extreme left position under the action of gas from the battery cavity 8. In this case, the pressure line 9 is separated from the cavity 6 by the left side of ska 24. The spool 4 under the action of the spring 5 is in the extreme right (according to the drawing) position, separating the cavities b and 7. Under the action of the force of the static preload, the piston head 2 moves -, squeezes the gas in the accumulator 8, while the liquid through the valve 13 and the channel 14 enters the cavity b. of the inlet. When opening the channel 11, the liquid from the battery 10 enters the cavity of the platoon b and the piston-striker 2 moves to the right, compressing the gas in the battery 8 (idling). At the same time, the fluid from the drain cavity 7 is forced out through that drainage channel 21 in the housing 1, which in this working cycle (depending on the required energy of impact1) is communicated by the control spool 22 through the passageway 23 with the drain line 12. At the end of idling The piston of the right-sided piston 2 cuts 24 cuts off the emptying of the drain 7 from the window 21 and channel 12. Next, the fluid from the cavity 7 is displaced by the piston-striker 2 into the control cavity 18 of the control unit 3, through the radial channel 19, acts on the spool 4, moving it to the left you Alkiva while the fluid from the cavity 15 through the channel 16 and the pipeline 17 into the drain line 12. When you move the spool 4, the radial channel 20 opens and the fluid from the pressure line 9 of the hydraulic accumulator 10 enters through the platoon cavity b into the cavity 7 and moves the spool with great speed extreme left (according to the drawing) position. The fluid pressure in cavities b and 7 is equalized, and then under the action of the compressed gas of the accumulator 8, the piston-firing pin 2 begins to move at the same acceleration rate (according to the drawing), and a working stroke of the piston-strike occurs. At the same time, the liquid from the cavity is 6 s. Minimum hydraulic soils are displaced to half-way - 7

Claims (1)

Claim Hydropneumatic percussion device, comprising a housing with radial channels, a piston-striker, a separating housing on the platoon and drain cavities / control unit with a spring-loaded spool, an accumulator, a mechanism for regulating impact energy, a pressure and a discharge line, characterized in that, in order to increase performance and efficiency of work, - the mechanism of controlling the impact energy is made in the form of a multi-position ^ cork cylindrical spool installed between the radial channels connected to the drain cavity, and a drain line, wherein the drain line is connected '25 to the central cavity of the spool, and on its side surface there are passage windows displaced in vertical and horizontal planes relative to each other to connect the corresponding radial channel to the drain line, while the control unit' is in communication with the cavity a platoon with a radial channel with a length equal to 1-1.5. its diameter.