SU1654568A1 - Rock breaking device - Google Patents

Abstract

The invention relates to mining. The purpose of the invention is to increase reliability in operation. The length of the housing 1 of the device is sequentially installed with the possibility of radial extension in one direction of the pressing elements - plungers 3. Under the plungers 3, for extending and returning, the body (PT) is supplied under pressure through the working line and fitting line 22. With the possibility of extension in one direction with plungers 3 in the housing 1 is installed return piston b. On the working line there is a valve-slide valve cut-off unit for supplying the PT at the end of the extension of the plungers 3, consisting of a spool 10 and a valve chamber with a valve 15. Rigidly with the plungers 3, the piston 6 and the spool 10 are connected a longitudinal outer cheek 2. At the same time The working line is led under the piston 6, and the line of the choke 22 is above the piston 6. The spool 10 is installed in the sleeve 11 and has a bore in the middle part communicating the grooves 17 and 18 of the sleeve until the extension of the plungers 3 has finished. through cavity 1 9 under the butt of the spool 10, the opposite cheek 2, and the groove 18, and after turning them off through the grooves 18 and 17. 1 C.p. f-ly, 9 ill. t

Description

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Claims (2)

Claim 1. A device for breaking rocks, comprising a housing with successively installed pressure elements radially extending in one direction, pressure elements, a working line for supplying a working fluid under pressure for pressure elements to extend them, and a line for supplying a working fluid under pressure for returning pressure elements , characterized in that, in order to improve the reliability of the device. it is equipped with a return piston installed in the housing with the possibility of extension in the same direction with pressure elements located on the working line by a valve-spool assembly for shutting off the supply of the working fluid at the end of the extension of pressure elements and a longitudinal outer cheek rigidly connected to the pressure elements, the return piston and spool valve-spool unit, while the working line is led out under the return piston, and the supply line of the working fluid for returning the pressure elements is above the return piston. 2. The device according to claim 1, characterized in that the valve-spool unit is made with zoopotnik and valve chambers located in the housing, and the spool is made with an annular bore in the middle part, which communicates the working line with the space under pressure with 5 elements until the end of the extension of these elements, and the channel communicating the cavity under the end face of the spool, the opposite cheek, with the space under the pressure elements at the end of their extension 5, and the cavity of the valve chamber above and below the valve are respectively connected with the working line and along cavity of the spool chamber under the end face of the spool from the opposite cheek side, the valve being spring-loaded from the side of the cavity of the valve chamber under the piston. G -*1 B ~ b 2 --- B-B 19 14 15 FIG. 3 Gg Fig 5 FIG. 4 D ~ D E ~ E FIG. 7