Hydraulic pipe cutter for horizontal freezing pipe in tunnel

Abstract

The invention discloses a hydraulic pipe cutter for a horizontal freezing pipe in a tunnel, comprising a frame. Guide rods are fixedly connected to the two sides of the top of the frame; sliding sleeves are slidably connected to the surfaces of the guide rods; driving mechanisms are fixedly connected to the side faces of the sliding sleeves; a feed mechanism is fixedly connected to the middle of the top of the frame; the end of a movable rod of the feed mechanism is fixedly connected with the driving mechanisms; and the bottoms of the driving mechanisms are in transmission connection with a mechanical inner cutter mechanism. According to the invention, the driving mechanisms are arranged, the power of the driving mechanisms is a hydraulic motor, the hydraulic motor is small in size, lightin weight, resistant to impact and relatively stable in power output, so that a stable power source can be provided for the mechanical inner cutter mechanism; the hydraulic motor can be used only by matching with a common hydraulic pump station, so that construction and movement can be conveniently performed in a tunnel with narrow space; and the hydraulic pump station and the pipe cutter are of asplit structure, the hydraulic pump station is placed at the bottom of the tunnel during operation, and the pipe cutter operation can be performed only by moving the pipe cutter.

Description

technical field [0001] The invention relates to the technical field of tunnel construction equipment. Specifically, it is a hydraulic pipe cutter for horizontally frozen pipes in tunnels. Background technique [0002] The horizontal freezing pipe is one of the important facilities in the freezing method construction. It can use artificial refrigeration technology to change the natural rock and soil into frozen soil, making it a water-stop curtain with high stability and strength; [0003] After the construction of the side channel structure is completed and the freezer is shut down, the gas flame cutting method is used for cutting the freezing hole at present, that is, the oxygen plus acetylene hand-held cutting torch is used. When cutting, the exposed orifice on the surface of the tunnel segment is cut first. tube and frozen tube, and then cut the frozen tube in the segment, and cut off the frozen tube in the segment by 60-80mm with a torch using a cutting torch (generally...

AI Technical Summary

Problems solved by technology

[0003] After the construction of the side channel structure is completed and the freezer is shut down, the gas flame cutting method is used for cutting the freezing hole at present, that is, the oxygen plus acetylene hand-held cutting torch is used. When cutting, the exposed orifice on the surface of the tunnel segment is cut first. tube and frozen tube, and then cut the frozen tube in the segment, and cut off the frozen tube in the segment by 60-80mm with a torch using a cutting torch (generally 5-6 blocks). During the cutting process, the space in the tube The size of the torch is small, and the torch has a certain size, which hinders the workers' sight, and the high temperature of gas cutting is about 3000°C. The high temperature cutting causes the permafrost to melt, and at the same time, smoke and flames are generated, which makes it impossible for workers to clearly see the situation inside the pipe, and the cutting effect cannot be guaranteed. The pipe can only be cut in pieces, and the deeper the pipe is, the smaller the action range of the torch is, the limited cutting length, and the cutting speed is slow and the efficiency is low, resulting in a long overall construction time. Flame cutting When cutting, multiple workers are required to cooperate with each other. In addition, the space of the side passage is narrow, and sparks are scattered during cutting, which is very prone to danger.

Images