SU619642A1 - Work-performing member - Google Patents

Description

one

The invention relates to mining engineering and can be applied in coal mining and tunneling machines with hydro mechanical executive body.

A device for spraying water through a cutting tooth of a mining machine is known, which consists of a cutting bit, a support for a tooth, a device for supplying water, and a valve at the outlet of the cavity of the support part of the tooth 1.

The disadvantage of the device is inoperability when used in hydro-mechanical executive bodies of mining machines, in which high-pressure water in the form of jets is used as a cutting tool that facilitates the work of the cutting lines in the destruction process, since the control valves of this device are controlled by gravity and after closing. during the whole working time (while high pressure takes place in the hydraulic system) they are pressed against the saddle by the force of hydrostatic pressure of water.

Closest to the present invention is the executive body of a coal combine with a device for distributing water supplied to nozzles consisting of a block of axially located valves,

controlled pushers that interact with a swashplate 2.

The disadvantage of it is that the opening and closing of the valves is carried out independently of the force acting on the cutter, which prevents the supply of water to those nozzles in the rezai lines that operate in the zone of a weakened coal array.

The purpose of the invention is to reduce the energy intensity of the destruction of coal.

This is achieved by the fact that the valve with the pusher is installed eccentrically relative to the axis of rotation of the cam with the bit.

The drawing shows the proposed executive body, a cross-section.

Claims (2)

The cam 1 with cutter 2 is eccentrically secured in the body 3 of the actuator on axis 4. The cam 5 is located in the housing, communicating with the control valve 6 and cam base 1. The push rod interaction point with the cam sole is some distance from the axis 4, forming the lever arm . In the fist there is a groove in which the elastic-elastic washer 7 is placed. With the help of the cover 8, the washer is pressed against the body, which prevents the head from entering the work zone,. pusher 5. In the housing 3 there are located a stream-forming device 9, connected by canals to the valve chamber 6 without valve. The operating organ works as follows. In the absence of contact of the cutter 2 with the Mac being destroyed, the ifBOM high-pressure water presses the valve b to the saddle - water access to the jet-forming devices 9 is closed. In the course of operation of the actuator, the cutter 2 interacts with the destroyed array, and the reaction of the cutting force acting on the cutter turns the fist 1 on the axis 4 at a certain angle. With its sole, the fist acts on the pusher 5, which opens the valve 6. In this case, the high-flow water flows to the jetting device 9. When the cutter 2 leaves the zone of interaction with the bottom of the water pressure, the valve closes and stops, and the flow of water to the streaming forming device 9. and the pusher 5 returns the fist back to its original position. Thus, the energy of the highly porous UI) La is spent on the formation of jets. The person in the moment of interaction of the incisors with the face upon achieving the definite - force on the incisor. In the process of working flexible plastipa 7 prevents the penetration of shtyb into the zone of operation of the pusher. Claims The executive body of a mining machine, comprising a housing, a cam with incisors, a jet-forming device, valves with pushers, characterized in that, in order to reduce the energy intensity of coal destruction, the valve with the plunger is set eccentrically relative to the axis of rotation of the cam with a pick. Sources of information taken into account in the examination: 1.UK patent N ° 1144340, cl. E 1 F, 1969. 2. Authors certificate of the USSR Ho 481698, cl. E 21 C 25/10, 1972.