SU964127A2 - Percussive apparatus for breaking hard material - Google Patents

Description

one

The invention relates to mining and road building machinery and is intended for use in the executive bodies of roadheaders, in drilling rigs for drilling large diameter wells, as well as rippers and hydraulic escalators for loosening heavy and frozen soils, breaking asphalt concrete and concrete pavements and soil compaction in cramped conditions.

According to the main auth. No. 821691, there is known a percussion device for destroying a solid medium, which includes a housing, in which axes of movement are installed, the firing pin has abutments and a piston made around the platoon piston and having a movement limiter, a floating piston; platooning, transmitting and accumulating to the camera; pilot spool; The main and drain lines and working tJIJCTfiVNIGHT 1Д.

A disadvantage of this device is the absence of its automatic feed to the face.

The purpose of the invention is to increase productivity.

This goal is achieved by the fact that the percussion device for destroying a solid medium is supplied with a distributor kinematically connected with it by pressing the hydraulic cylinders and

10, the spool has a channel with a check valve, which is arranged with the possibility of connecting one of the working cavities of the pressing hydrocylder with the pressure input of the control spool housing.

15 In one of the provisions of the latter.

FIG. I and FIG. 2 depicts the principal schematics of a percussion device in various work cycles; Fig, 3 20 hydraulic single bucket excavator with percussion device.

The impactor to destroy the solid medium includes a control

Column I with a housing 2, pressing the hydraulic cylinder 3 with a distributor 4, a housing 5 in which the firing pin 6 moves, a floating piston 7 and a platoon piston 8 that covers the firing pin 6 and

has a travel limiter 9. Limiter 9 is rigidly connected to housing S

and fitted with axial bores. Y. Boeck 6 has sub-stops

in the form of crackers 11. which are installed in the slots 12; the device elements form a cocking 13 between them, transmitting 14 and accumulating 15 cameras; In the platoon piston 8 there are annular grooves 16, 17 and 18 and radial channels 19 and 2O, on the external striker - an annular groove 21, and in the case 5 - openings 22, 23 and 24, the Device has a pressure 25, connected to the entrance of the case 2 of the gold I and a drain 26 of the highway and the tool 27, the Case 2 has a spring 28, the control cavity 29, 30 with a check valve 31. Channel 30 is periodically connected to the working lanes Strongly 32 biasing the hydraulic cylinder 3,

. Impact device

A solid medium is mounted on a single-bucket hydraulic excavator 33, which contains the base belt 34, the boom 35, the arm 36, the bucket 37 and the control hydraulic cylinders. On the front wall of the bucket 37 is fixed to the housing 5 of the percussion device, moved to the bottom of the pitjt hydrocylide 3,

The impactor for destroying a solid medium operates as follows.

Before switching on the work, the firing pin 6 under the action of gas pressure in the accumulating chamber 15 is located in the extreme left (according to the drawing) position (FIG. 2). og drain line 26, Crackers 11 are recessed into the body of the striker 6.

The working fluid from the pump (not shown) of the base machine 34 goes to the spool I and through the check valve 3.1 channel 30 into the cavity 32 of the hydrogenerator 3 and displaces the rod of the latter. At the same time, the handle 36 is rotated and the device body 5 is pressed against the tool 27, on which a force occurs, corresponding to the resistance of the slab. This force is transmitted through the tool 27.

the striker 6, which begins to move to the right (according to the drawing) and releases the crackers II, and also informs with its groove 2 annular grooves 17 and 18 of the piston 8 of the platoon.

The control cavity 9 of spool I communicates through the grooves 17, 18 and groove 21 and, holes 22 and 24 with a drain line 26. Under the action of the spring 28, the valve 2 occupies the extreme right position and informs the platoon 13 of the chamber 13 with the pressure line 25 and cuts the latter from the cavity 32 hydraulic cylinders 3 (FIG. 3), the working fluid, acting on the platoon piston 8, moves it together with the striker 6 (to the right in the drawing), compressing the gas in the accumulating chamber 15, t, e, the mobile masses are recovered.

At the extreme right position of the moving masses (Fig. 3), the crackers 11 come into contact with the stop 9 of the stroke and are recessed into the body of the striker 6, the Striker freed from communication with the platoon piston 8 under the action of the compressed gas of the accumulating chamber 15 and the transmission chamber fluid 14, accelerates and strikes the tool 27. The piston 8 of the platoon, while continuing to move to the right, informs the control lanes 29 of the housing 2 through the radial holes of the housing 22 and 23 and the groove 16 in the piston 8 of the platoon with a pressure line 25.

Spool I moves to the left and cuts off the pressure line 25 from the platoon chamber 13 and communicates it to the drain line 26.

When the fluid pressure in the platoon chamber 13 drops, the piston 8 of the platoon moves to the far left position under the action of the compressed gas of the accumulating chamber 15 and the fluid of the transfer chamber 14. At the same time, the pressure line 25 through channel 30 connects with the band 32 of the hydraulic cylinders 3, the rod of the buoy 37 feeding hydro-cylinder moves, rotates the handle, and consequently presses the body of the percussion device to the tool 27 which moves the strikes 6, the crackers II are free and the cycle repeats.

The use of the proposed device improves performance in the destruction of a solid medium.

Claims (1)

1. USSR author's certificate No. 821691, cl. Е 21 С 3 / 2О, 1978 (prototyon). 7 t / // 3 / I I / F1 / city / fG // / / fug. r A // l // r /// A ///// A /// f // / /