Full cross-section rock tunnel heading machine knife flywheel for assisting to break rock with burning and water-shocking

Abstract

The invention discloses a full cross-section rock tunnel heading machine knife flywheel for assisting to break rock with burning and water-shocking. The full cross-section rock tunnel heading machineknife flywheel for assisting to break the rock with the burning and water-shocking comprises a rock tunnel heading machine knife flywheel body, and the rock tunnel heading machine knife flywheel bodyis provided with side hobs, center blades, positive hobs, ballast outlets and ballast scraping buckets. Multiple high-temperature flame nozzles and low-temperature water nozzles are evenly arranged onthe end face of the knife flywheel body, and the arrangement height of the high-temperature flame nozzles and the low-temperature water nozzles is lower than the height of the envelope surfaces of the positive hobs; and the high-temperature flame nozzles communicate with a combustible gas pipeline and an oxygen pipeline, and the low-temperature water nozzles communicate with a water supply pipeline. The problems of low rock-breaking and tunnelling efficiency and serious hob wear in the process of breaking hard rock by rock tunnel heading machine in the prior art is solved, the initiation andthe extension of cracks in the rock is promoted based on the principle of thermal expansion and thermal contraction the thermal splitting, so that rocks are easy to break, the rock breaking efficiencyof hobs is improved, the wear of hobs is reduced, and the construction cost is reduced.

Description

technical field [0001] The invention relates to the technical field of mechanical design, in particular to a cutter head of a full-section rock tunnel boring machine which assists in crushing rocks by fire and water excitation. Background technique [0002] Full-face rock tunnel boring machine is the preferred equipment for excavating long-distance rock tunnels. Because of its safety, reliability, low environmental impact, low labor intensity, and fast excavation speed, it is widely used in underground transportation, water diversion projects, and high-speed railways. The operating objects of rock tunnel boring machines are usually high-strength and highly abrasive rocks. Therefore, the construction conditions are complex and harsh, which causes serious tool wear, maintenance and replacement are time-consuming and laborious, and affect the construction efficiency and cost of tunnel engineering. [0003] The cutter head is a key component of the rock tunnel boring machine. It...

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Problems solved by technology

[0004] The object of the present invention is to provide a full-section rock tunnel boring machine cutter head that is assisted by fire and water shock to crush rocks; it solves the problem of low rock-breaking excavation efficiency and serious hob wear in the process of rock tunnel boring machines breaking hard rock in the prior art problem, the present invention uses the principle of thermal expansion and contraction of rock and thermal splitting to promote the initiation and expansion of cracks inside the rock, so that the rock is easy to break, improves the rock-breaking efficiency of the hob, reduces the wear of the hob, and reduces the construction cost

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