SU1668671A1 - Method for water-jet rock disintegration and relevant device - Google Patents

Abstract

The invention relates to the mining industry and is intended for hydraulic destruction of the soil. The goal is to increase the productivity of the destruction of the soil by increasing the hydrodynamic effect of a pulsed jet of water. The device includes a barrel 2, a nozzle 3 fixed thereto with a nozzle 4 and electrodes 5. Electrodes 5 are connected to a voltage source 7 and are mounted on the outer side nozzle 3 in front of its nozzle 4. Electrodes 5 are arranged to create a pulsed electric spark in the jet water, pressurized water is supplied to the barrel 2. A water jet is formed in the nozzle 4. A pulsed electric spark is produced from the outside of the nozzle 3 in a water jet after it has flowed out of the nozzle 4 with a time interval equal to the phase of propagation of disturbances in the water jet. 2 sec. f-ly, 1 ill.

Description

The invention relates to the mining industry and is intended for hydraulic destruction of the soil.

The purpose of the invention is to increase the productivity with the destruction of the soil due to the increased hydrodynamic effect of a pulsed jet of water.

The drawing shows the device, side view.

The device includes a pressure hose 1, a barrel 2, a nozzle 3 fixed on it with a nozzle 4, and electrodes 5 installed in a dielectric 6 and connected to a voltage source 7 by wires 8.

Electrodes 5 are installed on the outside of the nozzle 3 in front of its nozzle 4 with the possibility of creating a pulsed electric spark in a jet of water.

The method of destroying the soil with a stream of water is carried out as follows.

Water is fed through the pressure hose 1 into the barrel 2 and the nozzle 3. Having elapsed with a compact jet from the nozzle 4 at high speed, it creates a hydrodynamic effect on the eroded soil and its subsequent destruction. Electrodes 5 are installed as follows. that electrical discharge occurs in the plane of the cross section of the jet, and a spark pierces the jet of water. Having a higher temperature, the spark turns water into steam, and a discontinuity of the jet occurs. A local pressure jump occurs in it, the propagation of which along the jet is accompanied by a change in the area of the living section of the jet and the appearance of cavitation bubbles in the rarefaction region. Water is pumped by a high-pressure pump under pressure above 1-2 MPa, acquiring a velocity V above 20-60 m / s at the exit of the nozzle. Strengthening the impact of the jet on the eroded

ABOUT

about with

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the soil is achieved by creating a pulsed electric spark over time intervals T equal to the propagation phase of disturbances in the jet:

(1-V2 / C2),

where C is the velocity of propagation of the shock wave;

I is the distance from the nozzle to the bottom. The resonance creates a significant amplitude of the shock wave of a pressure jump, the propagation of which in rocky soil leads to an increase in microcracks and a decrease in the ability to resist erosion.

F about rmul and izrete ni

1. A method of destroying soil with a stream of water, including the supply of pressurized water to the barrel, the implementation of a pulsed electric spark discharge and the formation of a jet of water in the nozzle of the nozzle, is different from the fact that, in order to increase productivity during the destruction of the soil by increasing the impact of a pulsed jet of water, a pulsed electric spark is produced from the outside of the nozzle in a jet of water after it has elapsed from the nozzle with a time interval equal to the phase of propagation of disturbances in the jet of water.

2. A device for destroying soil with a stream of water, including a barrel, a nozzle attached to it with nozzles, and electrodes connected to a voltage source, which is concerned with the aim of increasing the productivity of soil destruction by increasing the hydrodynamic effect of a pulsed water jet. The electrodes are mounted on the outer side of the nozzle in front of its nozzle with the possibility of creating a pulsed electric spark discharge in a jet of water.

7-X ///// W /

6 5

Claims (2)

Claim 1. The method of destruction of the soil by a water jet, including the supply of pressure water to the barrel, the implementation of a pulsed electric spark discharge and the formation of a water jet in a nozzle nozzle, characterized in that, in order to increase productivity during soil destruction by enhancing the hydrodynamic effect of a pulsed water jet, impulse ”^ an electric spark discharge is produced from the outside of the nozzle in the water stream after it expires from the nozzle with a time interval equal to the propagation phase of disturbances in the water stream, 2, A device for destroying soil with a water jet, including a barrel, a nozzle attached to it with a nozzle and electrodes connected to a voltage source, characterized in that, in order to increase productivity during soil destruction by enhancing the hydrodynamic effect of a pulsed water jet, electrodes mounted on the outside of the nozzle in front of its nozzle with the possibility of creating a pulsed electric spark discharge in a stream of water.