An industrial microwave-assisted rock-breaking device based on a point-focus lens antenna

Abstract

The invention relates to a rock crushing technology, which belongs to the technical field of assisting rock crushing by using a point-focus lens antenna to focus high-power industrial microwaves. The device of the present invention includes a high-voltage power supply, a microwave generator, a circulator, an automatic or manual impedance tuner, a rectangular conversion waveguide (TE10-TE11 mode), a point-focus dielectric lens antenna, a lens bracket, a movable lifting platform and a water load Wait. The microwave power supply is connected to the microwave generator, circulator, tuner, rectangular waveguide and point-focus lens antenna through cables, rectangular waveguide flanges and circular waveguide flanges in turn. Except for the microwave power supply, all the above devices are on the movable platform. superior. By focusing the microwaves, the device of the invention can realize the focusing of the microwaves within a certain distance, increase the power density of the microwaves, and improve the energy efficiency and 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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