SU717331A1 - Rock-breaking apparatus - Google Patents

Description

 : 1 The invention relates to the field of the mountain industry, namely, devices for electrothermal destruction of oversized pieces and whether hangs. Devices for the destruction of rocks by electrical contact are known. method, cocTOHiwe from electrodes connected to a current source and brought into contact with a crushed mass 1. The disadvantages of the known devices are the need to find the best points of application of electrodes and the difficulty of fixing the electrodes at rational points of application of the load, which causes them to be limited Possibilities can be used to destroy the visors on the ledges of the quarries and large pieces lying on their slopes. The closest in technical essence and the achieved result to the present invention is a device for destruction of rocks, including a multipoint electrode flexible grid connected to a current source 2. The disadvantages of the known device are: making electrodes, which occupy a relatively large area, from metal, that when high voltage is applied to them for destruction of lumpy rocks, they can lead to their melting after thermal breakdown of the rock with a sufficiently long time zrusheni; a sharp redistribution of potentials during a breakdown on the surface of similar electrodes, as a result of which an electric current arises there, which can lead to significant energy losses; The known device is difficult to use for breaking peaks, on ledges of quarries and large pieces, lying 1х1Х on their slopes. . The aim of the invention is to increase the efficiency of the destruction of oversize and hangs on the ledges of quarries and in underground ore chutes, as well as to increase the operational reliability of the device. This is achieved by the fact that the electrode grid is made of dielectric tubes, inside of which there are conductors with

they are refractory elements, and dielectric filaments connecting the dielectric tubes to each other, and in the dielectric tubes there is an opening and for fixing the refractory elements on the conductors.

For the convenience of fixing the electrodes on the rock, the electrode grid can be made in three sections, while its intermediate section is mounted from dielectric strands, and graphite washers can serve as refractory elements.

FIG. 1. Shows a device for the destruction of rocks, top view; FIG. 2 is a section along A-A in FIG. one; in fig. 3 is a section along BB in FIG. one; in fig. 4 - 1 replenishment of tight washers, view over g; Fig. 5 illustrates fastening of refractory washers with holes (section BB on fig.1, the second option); fig, b shows the installation of a device for destruction on a piece of rock.

The device includes an electrode grid, the outer sections 1 and 2 of which are made of dielectric tubes 3, and inside the tubes 3, conductors 4 are installed. In this case, the conductors of one of the sections are connected to the negative pole and the conductors of the other are connected to the positive pole of the current source.

On the conductors 4, the refractory elements 5 are reinforced, for example graphite washers, which are installed in the holes of the dielectric tubes 3. The holes are made on the surface in contact with the rock to be destroyed 6, the refractory elements are fixed on the conductors at a certain distance with screws 7, for what The washer from 8 is from the front side.

Another option is to attach the refractory elements 5 to the conductors 4; in the washers 5, a through-hole is made. in the side, when the conductors 4 are installed into the dielectric tubes 3, the refractory elements 5 are gradually strung onto the conductors through the holes in the tubes 3. In the last holes, the refractory elements are fixed with screws. In the second embodiment, the attachment of the refractory elements 5 to the conductors 4, the holes in the dielectric of the Triangle tubes 3 are made as the contact surface. with; destructible rock, and on the opposite. When the refractory elements 5 are worn on one surface, the device can be used with the opposite surface,

 ,

Dielectric tube 3 between

collect connected dielectric

nit mi 9,.

For the convenience of fixing the electrodes on the destructible wire 6, the outer sections 1 and 2 of the electrode grid are connected to each other by an intermediate section 1.0, which is connected from the electrical filaments 11.

A heat-resistant dielectric material, such as polyurethane, can be used to fabricate the proposed electrode grid.

The device works as follows.

A flexible electrode grid is thrown onto a large piece of rock to be destroyed 6. An intermediate section 10 of dielectric material serves to hold the outer sections 1 and 2 on the piece. An electrical voltage, enough to destroy pieces of rock, to the refractory elements 5 is fed through the conductors 4.

- Such a device is easy to throw on the visor formed on the ledge of the quarry on a large piece of rock lying on its slope. In especially hard-to-reach places, for example, in the construction of dams, this can be done with the help of a helicopter.

The advantages of the proposed device in comparison with the known ones are: the possibility of simple and reliable strengthening of the multipoint electrode on large pieces and overhangs; higher operational reliability of the device; the ability to supply multipoint electrodes with a voltage sufficient for dl. destruction of large pieces and freezes.

Claims (3)

1. A device for destruction of rocks, including a multipoint electrode flexible. Grid connected to a source of current, characterized in that, in order to increase the efficiency of destruction of oversize and lags, as well as increase the operational reliability of the device, the electrode grid is made of dielectric tubes inside conductors with the flame-resistant element L and dielectric The threads connecting the dielectric tubes to each other, and in the dielectric tubes there are holes for fixing the refractory elements on the conductors, i 2. The device according to claim 1, which is different from the fact that the electrode grid is made of three sections, while its intermediate section is mounted of dielectric filaments,. 3. The device according to claim 1, except for the fact that the high-melting point of the elements are graphite shay. Sources of information taken into account in the examination 1. USSR author's certificate number 509721, cl. E 21 C 37/18., 1974. 2, Patent CD1A No. 3460766, cl. 241-1, the Republican. 1969. 4 / J J 539 3 g GO tpvf / dA Fig-2 1 Fig. 3  3 FIG.