Liquid discharge apparatus for a shearing-loader type mining machine

Abstract

A shearing drum of a shearing-loader type mining machine includes nozzles distributed about the periphery thereof for the delivery of high-pressure liquid from only an arcuate segment of the drum while directed for working a mine face. Conduit members extend radially in the shear drum to communicate with nozzle members. A shaft or tube about which the shearing drum rotates has at least one internal opening to conduct liquid in a direction generally parallel to the rotational axis of the shearing drum. The shaft or tube includes a valve formed by one or diametrically-opposite valve recesses at the longitudinal center within the periphery thereof. The size and configuration of the valve recess are selected to correspond to the period of time for which liquid is discharged from the individual nozzles. Liquid passed from the valve recess is delivered by radial conduit lines formed in a member that rotates with the shear drum while in sealed communication with the valve recess. The shaft or tube may be rotated by a drive such as a linear or rotary motor or a crank drive which includes a disc coupled to the shaft or tube for rotary movement thereof by bars or chains which are arranged parallel and connected to diametrically-opposite points on the disc and extend to the machinery unit where they are anchored by pivot pins.