Automatic arch frame lifting device for cantilever type heading machine and working method thereof

Abstract

The invention discloses an automatic arch frame lifting device for a cantilever type heading machine. The automatic arch frame lifting device comprises a frame, lifting arms, an adjusting oil cylinderand a rotating platform, wherein the frame is mounted on a cutting arm of the cantilever type heading machine; a positioning shaft positioned above the frame is fixedly mounted at one end of the topof the frame; two shaft sleeves are mounted on the positioning shaft in a sleeving manner; the adjusting oil cylinder is fixedly mounted in the center of the top of the frame; a piston rod of the adjusting oil cylinder is hinged to the two shaft sleeves; the two lifting arms are respectively positioned on two sides of the adjusting oil cylinder; one end of each of the two lifting arms is and fixedly mounted on the corresponding shaft sleeve in a sleeving manner; the rotating platform is fixedly mounted at the other ends of the lifting arms; a balance rod is fixedly mounted at the top of the rotating platform; two telescopic oil cylinders are mounted inside the balance rod; piston rods of the two telescopic oil cylinders respectively extend out of two ends of the balance rod; and positioning plates are mounted at the end parts of the piston rods. The invention further discloses a working method of the automatic arch frame lifting device. According to the automatic arch frame lifting device disclosed by the invention, the mechanization and automation degree of arch frame mounting can be improved, and conditions are provided for integrated construction of 'anchor digging and spraying'of the cantilever type heading machine.

Description

technical field [0001] The invention belongs to the technical field of tunnel excavation and construction, and relates to construction equipment for arch support in tunnels, in particular to an automatic arch lifting device for a cantilever type boring machine and a working method thereof. Background technique [0002] At present, in the construction of tunnels with weak surrounding rocks in China, it is necessary to install arches and cooperate with reinforced mesh shotcrete support to strengthen the structural strength of tunnel surrounding rocks. The lifting and installation of the arch frame is divided into manual and mechanical methods: 1. The manual installation method is to lift the arch frame on the edge of the rock formation by manpower, fix it with anchor rods, and then connect it into a ring in turn to form the surrounding rock. supporting structure. The single-piece weight of the arch frame is generally more than 100Kg, which requires the cooperation of multiple...

AI Technical Summary

Problems solved by technology

The repeated entry and exit of this kind of machinery virtually increases the loss and energy consumption of the machinery, increases the maintenance cost of the machinery, and reduces the economic benefits of construction; The ineffective working time of leaving the site is also continuously increasing, especially in the excavation construction of ultra-long tunnels. This invalid working time of entering and leaving the site accounts for most of the construction time and has a huge impact on the construction speed of the roadheader.

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