A new type of screw machine suitable for small radius turning of shield machine

Abstract

The invention discloses a novel screw conveyor suitable for a shield tunneling machine to make minor-radius turns. The novel screw conveyor comprises a cylinder, a swinging shelf, a spiral rod installed in the cylinder, spiral blades installed on the spiral rod, a driving motor for driving the spiral rod to rotate and a mud outlet formed in the rear end of the cylinder; the cylinder comprises a rear cylinder body, a rotation cylinder body and a front cylinder body, the diameter of the rear cylinder body is identical to that of the rotation cylinder body, the diameter of the rotation cylinder body is smaller than that of the front cylinder body, the front cylinder body is connected with a concave base of the rotation cylinder body through a spherical body, and a VD sealing ring and an O-shaped sealing ring are arranged on the outer surface of the spherical body. When the shield tunneling machine makes turns, firstly, the front cylinder body follows the shield tunneling machine to make turns, and then the rotation cylinder body and the rear cylinder body follow the shield tunneling machine to make turns; the swinging shelf is arranged, and the screw conveyor can quickly conduct follow-up deflection when the shield tunneling machine makes large-radian turns; the problem that a screw conveyor cannot meet the requirement for sharp turns of the shield tunneling machine is solved, andthe novel screw conveyor has good sealing performance and meets the requirement for smaller-radius turns of the shield tunneling machine.

Description

technical field [0001] The invention relates to the field of tunnel engineering construction equipment, in particular to a novel screw machine suitable for small-radius turning of a shield machine. Background technique [0002] During the underground excavation process of the shield machine, it is necessary to remove the excavated slag. According to the classification of the stratum shield machine, it is mainly divided into two categories: earth pressure balance shield machine and mud-water balance shield machine. The mud-water balance shield machine relies on the mud pump And the mud pipeline directly discharges the muck slurry to the dregs pool outside the well, while the earth pressure balance shield machine discharges the muck to the muck pool outside the well by means of a screw machine and a belt conveyor combined with a tunnel transport soil bucket truck. Therefore, the screw To become an earth pressure balance shield machine, key components must be prepared. [0003...

AI Technical Summary

Problems solved by technology

[0003] The shield machine will mainly use the folding device and the replica knife, combined with the appropriate overbreak of the replica knife and the correct selection of the propulsion jack to carry out the turning of the shield machine, but the current design of the screw machine is generally straight cylinder connection, When the shield machine turns, it will be limited by factors such as the screw machine. The deflection angle is generally within the range of 1-1.5°. The turning radius is large during the excavation process, and it is impossible to turn with a small radius. In this way, the shield machine can only meet the requirements of the subway. The project stipulates the turning radius. In water, cable tunnels, considering land acquisition, ground construction, avoidance of underground pipelines, etc., sharp turns with a smaller radius are required, and the straight body connection cannot meet the needs.

Images