Industrial microwave-assisted rock breaking device based on point focusing lens antenna

Abstract

The invention relates to a rock breaking technique and belongs to the technical field of rock assisted crushing by focusing high power industrial waves by means of a point focusing lens antenna. A device comprises a high pressure power supply, a microwave generator, a circulator, an automatic or manual impedance tuner, a rectangular-circular conversion wave guide (TE10 mode-TE11 mode), a point focusing medium lens antenna, a lens bracket, a movable lifting platform, a water load and the like. The microwave power supply is connected to the microwave generator, the circulator, the tuner, the rectangular-circular conversion wave guide and the point focusing lens antenna successively through a cable, a rectangular wave guide flange and a round wave guide flange. Except the microwave power supply, the above devices can be placed on the movable lifting platform. The device can focus microwaves in a certain distance by focusing microwaves to improve the microwave power density so as to improve the energy efficiency and the time efficiency of microwave-assisted rock breaking.

Description

technical field [0001] The invention relates to a rock-breaking technology, in particular to an industrial microwave-assisted rock-breaking device based on a point-focus lens antenna. Background technique [0002] In the fields of rock excavation and tunneling, the crushing of rocks with good integrity, high strength and high abrasiveness is a technical problem that needs to be solved urgently. Conventional rock-breaking machines, such as full-face tunnel boring machines (TBMs) and cantilever roadheaders (roadheaders), often experience a sharp increase in tool wear, a severe decline in the excavation rate, and a severe delay in the construction period when working in rocks with low excavability. and a substantial increase in costs. The development of new auxiliary or independent rock breaking methods is imminent. New rock-breaking methods that have been explored include but are not limited to high-pressure water jets, lasers, plasma beams, high-voltage / high-frequency curre...

AI Technical Summary

Problems solved by technology

The common problem of these methods is that it is technically feasible in the laboratory, but the adaptability of the equipment in the field engineering application is poor, and the energy cost is high

The limitation of this invention is that it is difficult to achieve waveguide matching for this variable cross-section waveguide, and a large reflection will be generated at the variable cross-section; at the same time, a very short distance (about 1cm) near the exit of the rectangular waveguide will generate a large energy consumption When the waveguide cannot be in close contact with the rock face, it is difficult to achieve the purpose of focusing microwave power on the face

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