SU1372039A1 - Percussive device - Google Patents

Description

(21) 4030388 / 22-03

(22) 24.02.86

(46) 07.02.88. Bul № 5

(71) Vinnitsa Polytechnic Institute

(72) A.F. Ponomarchuk, B.G. Bovduy, I.V. Kots, G.S. Town Hall to and V.A. Deprived in

(53) 622.233.5 (088.8)

(56) Copyright testimony of the USSR No. 1141190, cl. E 21 C 3/20, 1983.

USSR author's certificate 985273, cl. E 21 C 3/20, 1981.

(54) DEVICE OF SHOCK ACTION

(57) The invention relates to the mining industry and makes it possible to increase the reliability of the device and to simplify its design by implementing one-step control of the piston head. The device includes a housing (K) 1, forming a cavity 3 with PB 2, periodically communicated

through the control unit 5 with pressure 6 or drain 7 lines (M), and tool 8. Block 5 is made in the form of a spring-loaded spool 11 placed in a bore 9 K I with the first 12 and second 13 channels, a groove 14 and two end bores 15, and two different in diameter plungers 17, 18. They are placed in bores 15, 16 and form a control cavity 19, 20 with a spool 11. Moreover, a smaller plunger 18 is placed in the bore of the spool 11 on the side of the spring 10. The working fluid enters in MB , and PB2 is idling. The working stroke cavity 4 is connected to the drain line, and the spool 11 is displaced to the right. The cavity 19 is combined with the drain, and the oil distribution groove 23 of the spool 11 - with a boring 24 K 1. As a result, PB 2 makes a working stroke. The spool 11 returns to the left. The cycle is repeated. 1 il.

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The invention relates to the mining industry, namely to impact devices for the destruction of rocks and artificial materials.

The purpose of the invention is to increase the reliability of the device and simplify its design by implementing single-stage control of the piston head.

The drawing shows the proposed device.

The percussion device comprises a housing 1, formations with a piston-brisk 2 cavity 3 of idling and a cavity 4 of the stroke, which is periodically communicated through the control unit 5 with pressure 6 or drain 7 manifolds, and tool 8.

The control unit 5 is made in the form of spring-loaded spring-loaded 10 of spool 1 1 located in the bore 9 of the housing 1 with the first 12 and second 13 channels, the groove 14 and two front 25 bores 15 and 16, and two different plungers of different sizes 15 and 16 spool 11 and the control cavities 19 and 20 forming with it .30

In the bore of the spool 11 on the side of the spring 10 a smaller piston 18 is placed. The first channel 12 of the groove 14 of the spool 11 periodically reports a control cavity 19 located on the side of jj spring 10 with a pressure 6 or drain 7 main, and the second channel 13 of the spool 11 communicates a cavity 20 controls with a pressure line 6. A no-load cavity 3 is in communication with a pressure line 6 of pump 21, having a battery 22.

The spool 11 has an oil distribution groove 23, and the housing has a pressure bearing 24, drain bores 25 and 26 connected by channel 27, and channel 28. The control unit 5 has an adjusting screw 29.

The device works as follows.

The working fluid enters under pressure from the hydraulic pump 21 to the pressure line 6. Hydropneumatic accumulator 22 is charged and pressure in the cavity 3 and the pressure bore 24 increases. Under the action of increasing pressure, the piston head 2 is displaced to the extreme right position,

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goes idle. In this case, the cavity 4 is connected by means of the control channel 28 of the groove 23 and the drain bore 25 to the drain main. The resulting force from the influence of the working fluid at the end of the plungers

17 and 18, the valve 11 displaces the latter to the right, overcoming the force of the spring 10. In doing so, the groove 14 cuts off the pressure bore 24 and communicates with the drain bore 26, with the result that the cavity 19 communicates with the drain. Thus, at the initial moment, the force of moving the spool 11 is determined by the product of the difference in the working areas of the plungers 17 and

18 on the pressure of the supplied working fluid, developed as a result of overcoming the resistance of the force from the side of the spring 10. After communication of the cavity 19 with the drainage, the force from the pressure of the working fluid

The spool 11 is determined only by the effective working area of the plunger 17. This results in a fixed holding of the spool 11 in the extreme right position during the period when the roll 23 due to the displacement of the spool 11 communicates with the pressure bore 24. In this case, the channel 28 is connected to cavity 4. Hydropneumatic accumulator 22 is discharged, and the firing piston makes working stroke before colliding with tool 8. Pressure in pressure line 6 decreases, which leads to return of the spool 11 to the extreme left position. Further, the duty cycle is repeated in automatic mode.

By adjusting the spring 10 with the screw 29, the switching start pressure value of the spool 11 can be changed in the required range. This allows control of the impact energy of the piston-blow 2 over tool 8. The frequency of impacts is controlled by changing the performance of the hydraulic pump 21. By selecting the required frequency and energy of impacts Piston-friction ensures optimal drilling mode depending on the parameters of the rock.

Claims (1)

The invention of the percussion device, comprising a housing, forming with the piston-brisk cavity, periodically communicated through the control unit with 311320394 porous or drain lines, searched in the bores of the spool and the tool, characterized by control spaces with it, with the aim of increasing the reliability of the device and simplifying the bore in the spool from the side of the device - its design is due to the plunger being carried out, with the first channel not having a single-stage control; the piston and the groove of the valve periodically are non-stop, the control unit executes the control-spring located on the side in the form of a spring-spring located in the bore From the spring-loaded spool with a nep-jg or drain main, and the second and second channels, the spool bore groove informs the other two frontal bore holes, and the two-side control cavity with pressure pistons of different diameters, gistralyu.