RU2399761C1 - Rock destructing device - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: device includes pipe with communications for supply of fuel, oxidiser and cooling agent, as well as distributor located in upper pipe part and flame jet burner with a tool, which is mounted in lower pipe part. Between the pipe and flame jet burner there arranged is adapter with the bracket on which there fixed is the tool having inner channel interconnected with cooling agent supply communication. At that, bracket is attached to the tool in a movable manner and their position is fixed relative to each other by means of a limit stop. Such device creates thermoelastic stresses in rock lumps, which exceed their strength limit.

EFFECT: increasing rock destruction work efficiency and decreasing work costs.

2 cl, 1 dwg

Description

The invention relates to the mining industry and belongs to devices for thermal destruction of rocks. The most effective area of its application is the secondary crushing of oversize in granite quarries during the production of crushed stone.

A device for rock destruction containing a pipe with communications for supplying fuel and an oxidizing agent, a distributor located in the upper part of the pipe, and a jet burner mounted in the lower part of the pipe with a mechanical tool (see L-1). A disadvantage of the known device is its low operational reliability due to overheating of a mechanical tool located in the impact zone on the face of a high-temperature gas jet.

The closest to the proposed technical essence and the achieved result is a device for the destruction of rocks (see L-2). It is taken as a prototype. The prototype device includes a pipe with communications for supplying fuel, an oxidizing agent and a refrigerant, as well as a distributor located in the upper part of the pipe and a jet burner mounted in the lower part of the pipe with a mechanical tool. The refrigerant (for example, water or antifreeze) in this device is used to cool the working part of a mechanical tool located in the zone of high-temperature heating of the face.

The disadvantages of this device include the complexity of the design and, as a consequence, the low reliability of its operation, as well as the lack of the possibility of exposure to the bottom of high-temperature heating with its subsequent cooling. Such a contrasting temperature effect on the face leads to a significant increase in the efficiency of rock destruction.

The technical result of the claimed invention is to increase the operational reliability of the device and increase the efficiency of the destruction of rocks.

The essence of the invention lies in the fact that the device for rock destruction includes a pipe with communications for supplying fuel, an oxidizing agent and a refrigerant, as well as a distributor located in the upper part of the pipe and a jet burner mounted in the lower part of the pipe, while it further comprises an adapter with a bracket located between the pipe and the jet burner, and on the bracket is fixed a tool having an internal channel in communication with the refrigerant supply communication, and the tool is located outside the height zone okotemperaturnogo heating the bottom and is connected to the bracket movably, in addition, their position relative to each other is fixed by a stopper.

The present invention is illustrated in the drawing, where figure 1 shows a General view of a device for the destruction of rocks.

The inventive device includes a jet burner 1, adapter 2, pipe 3 with communications for supplying fuel 4, oxidizer 5, refrigerant 6, distributor 7, bracket 8, stopper 9, tool 10 with an internal channel 11.

The work of the proposed device for the destruction of rocks is as follows.

Fuel and oxidizer are supplied under pressure to the combustion chamber of the jet burner 1 via communications 4 and 5, where they are mixed. After ignition of the mixture, the products of combustion by intracameral pressure with supersonic speed are ejected through the outgoing nozzle. At the exit of the nozzle, a gas jet is formed with a temperature of 900-1350 ° C and a speed of 1300-1350 m / s.

The tool is located outside the heat-affected zone and does not overheat, and coolant 6 enters the heated surface layer of the rock through its internal channel 11. Due to this contrasting temperature effect on the face in the rock, thermoelastic stresses exceeding the tensile strength arise. Since the temperature of the gas stream varies along its length, the optimal thermal effect on the face depending on the physicomechanical properties of the rock is regulated by installing the tool 10 in the bracket 8 using the stopper 9.

The proposed device can be used as a hand tool for the secondary crushing of oversized granite quarries in the extraction of crushed stone. Compared with the explosive method or the use of hydraulic hammers, the operation of the proposed hand tool will increase the productivity of work and reduce the cost of their implementation.

Information sources

1. Auth. testimonial. No. 905413, IPC Е21В 7/14, 1982.

2. USSR patent No. 1725762, IPC Е21В 7/14, 1991.

Claims (2)

1. A device for rock destruction, including a pipe with communications for supplying fuel, oxidizer and refrigerant, as well as a distributor located in the upper part of the pipe and a jet burner mounted in the lower part of the pipe, characterized in that an adapter is placed between the pipe and the jet burner with a bracket on which a tool is fixed having an internal channel in communication with a refrigerant supply communication. 2. The device for the destruction of rocks according to claim 1, characterized in that the tool is located outside the zone of high-temperature heating of the face and is connected to the bracket movably, while their position relative to each other is fixed by a stopper.

Images