Stepwise decompression type shield machine

A technology of shield machine and shield machine, which is applied to mining equipment, earthwork drilling, tunnels, etc., can solve the problems of high construction cost, and achieve the effects of high production efficiency, simple switching operation, and good fluidity

Pending Publication Date: 2019-01-29
CHINA RAILWAY CONSTR HEAVY IND
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  • Application Information

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Problems solved by technology

The existing dual-mode shield machine does not fundamentally solve th

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[0024] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0025] First of all, it should be noted that the upper and lower parts of the cylinder of the screw machine 1 described in this application are for the convenience of description, with the screw shaft as the center, and the side of the cylinder of the screw machine 1 close to the ground is the "lower part", with The "upper part" on the si...

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Abstract

The invention discloses a stepwise decompression type shield machine. The stepwise decompression type shield machine comprises a shield main machine, a screw conveyor, a main mud inlet pipeline and amain mud discharging pipeline; the screw conveyor, the main mud inlet pipeline and the main mud discharging pipeline are arranged inside a shield of the shield main machine, the main mud inlet pipeline communicates with a soil bin at the front part of the shield main machine, and an inlet of the screw conveyor communicates with the soil bin; blades on a spiral shaft of the screw conveyor are provided with one or more segment interval areas in the axial direction, and the main mud discharging pipeline communicates with a cylinder of the screw conveyor and is provided with a first valve and a first mud pump; and the first mud pump is used for discharging mud in the screw conveyor through the main mud discharging pipeline, and a slag discharging outlet is formed in the tail of the screw conveyor. According to the stepwise decompression type shield machine, in a mud shield tunneling mode, the content of large-particle solids in a mud system can be effectively decreased, thus the installedpower of the pipeline conveying the mud is decreased, the equipment loss and the operating cost are reduced, slag in the screw conveyor is discharged through the slag discharging outlet, the slag precipitated in the screw conveyor can be continuously discharged, and the production efficiency is high.

Description

technical field [0001] The invention belongs to the field of shield tunneling, in particular to a step-by-step decompression shield tunneling machine. Background technique [0002] The full name of the shield machine is the shield tunnel boring machine. It is a special construction machine for tunnel excavation and is widely used in tunnel projects such as railways, highways, municipalities, and subways. Commonly used shield machines are divided into earth pressure balance shield machines and mud-water balance shield machines. The working principle of the earth pressure balance shield machine is that the cutter head cuts the soil layer, and the cut soil enters the soil cabin, and the soil in the soil cabin is balanced with the pressure of the excavation surface, and the slag is discharged by the screw conveyor in the soil cabin. Soil, the soil discharge device at the discharge port will carry out continuous excavation under the condition that the excavation amount and the a...

Claims

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Application Information

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IPC IPC(8): E21D9/12E21D9/06
CPCE21D9/06E21D9/12E21D9/124
Inventor 刘飞香程永亮彭正阳唐崇茂
Owner CHINA RAILWAY CONSTR HEAVY IND
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