Vertical shaft boring machine

Abstract

The invention discloses a vertical shaft boring machine which comprises a drilling rod system, a shield, a cutterhead, a derrick used for being installed on the ground, an upper driving device, a rod replacing device and a lifting oil cylinder, wherein the upper driving device, the rod replacing device and the lifting oil cylinder are installed on the derrick. One end of the drilling rod system is connected to the upper driving device, and the other end of the drilling rod system is connected to the input end of a speed reducer; and the output end of the speed reducer is connected to the cutterhead, a main beam is arranged on the shield, a sliding frame is arranged on the main beam, the sliding frame is connected to a supporting shoe through a tight supporting device, the supporting shoe is used for supporting the well wall tightly to provide reverse thrust, a propelling device is connected between the supporting shoe and the shield, and the speed reducer is fixedly installed on the shield. The driving torque is transmitted to the cutterhead through the upper driving device, the drill rod system and the speed reducer, so that the cutterhead driving torque is greatly increased; and meanwhile, the cutterhead can obtain larger propulsive force, the rock breaking footage under the unit rotating speed is improved, the cutterhead clamping risk is greatly reduced, a drill rod does not need to bear large torque, and the requirement for the performance of the drill rod and the manufacturing cost are reduced.

Description

technical field [0001] The invention relates to the technical field of building construction, and more specifically, relates to a shaft drilling machine. Background technique [0002] Shaft engineering is widely used in underground development fields such as mines, pumped storage hydropower stations, tunnel ventilation shafts, subway and railway tunnel shield initiation. At present, the common method of drilling and blasting is widely used in shaft engineering, which requires workers to work underground and directly contact the wall of the shaft. Due to the large disturbance of the surrounding rock by blasting, the working environment is very dangerous. Ordinary drilling method has high work intensity, slow construction speed, high cost and poor safety, so mechanized drilling method is the future development direction. [0003] Drilling method Drilling is a method of drilling a wellbore using shaft drilling rigs and other equipment. Its principle is to use the drill pipe of...

AI Technical Summary

Problems solved by technology

The drilling rig cutterhead drive system is arranged on the ground, and the driving torque is transmitted to the downhole cutterhead by the drill pipe. Due to the restriction of the drill pipe material structure and material performance, excessive torque and thrust cannot be transmitted, and the drilling depth is limited. At this time, the drill pipe is too long to withstand the huge torque and thrust, so the drilling thrust of the downhole cutterhead depends entirely on the counterweight, and the thrust cannot be adjusted. It is difficult or even impossible to excavate in hard rock formations.

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