Stretchable cutter disc capable of releasing after shield-tunneling-machine cutter disc is blocked

Abstract

The invention discloses a stretchable cutter disc capable of releasing after a shield-tunneling-machine cutter disc is blocked. The stretchable cutter disc comprises a cutter disc body composed of anouter cutter disc main body, an inner cutter disc main body and a center cutter disc main body, and is characterized in that at least one outer-cutter-disc-main-body stretchable driving device, an inner-cutter-disc-main-body stretchable driving device and a center-cutter-disc-main-body stretchable driving device which are used for driving the outer cutter disc main body, the inner cutter disc mainbody and the center cutter disc main body to move front and back in the axial direction of a shield tunneling machine are arranged on the back face of the outer cutter disc main body, the back face of the inner cutter disc main body and the back face of the center cutter disc main body respectively, and are electrically connected or wirelessly connected with a control center of the shield tunneling machine, and the cutter disc is controlled by the control center to stretch front and back. By means of the stretchable cutter disc capable of releasing after the shield-tunneling-machine cutter disc is blocked, the stretchable cutter disc can release in a manner of stretching the outer cutter disc main body, the inner cutter disc main body and the center cutter disc main body after the cutterdisc is blocked, and the using state of the cutter disc is recovered.

Description

technical field [0001] The invention relates to a shield machine, in particular to a telescopic cutter head which can be released after the cutter head of the shield machine is stuck. Background technique [0002] In recent years, my country's urbanization process has accelerated, and more and more cities regard the development of rail transit as an effective means to solve this problem. Underground space, as another valuable resource of the city, has been intensively developed and utilized, making the underground space more and more crowded, and the requirements for underground engineering construction are getting higher and higher. The use of shield machines to excavate underground passages has the advantages of small excavation volume, little disturbance to the environment, no settlement of surrounding soil layers, few restrictive conditions, and high degree of mechanization. Therefore, it is widely used in rail transit and tunnel construction. During the excavation proc...

AI Technical Summary

Problems solved by technology

During the excavation process of clay layer, silty clay layer and argillaceous siltstone and other strata, due to insufficient or excessive mud concentration, some relatively large pebbles remain in the excavation chamber, resulting in the following problems: (1). Concentrated mud will form a thick layer of mud cake on the excavation surface, and the cutterhead cutter may be embedded in the mud cake; (2), after stopping the propulsion, the cutterhead rotation time and mud circulation time are too short, and the stop torque is too large , making it difficult to start the cutter head again; (3) After the excavation is completed, the formation may deform and press the cutter head during the pressure holding process, which will cause a large frictional moment of the cutter head and cause the cutter head to be stuck

The patented technical method belongs to releasing the restriction of the stratum soil on the cutter head of the shield machine from the outside, so as to get out of trouble. The operation process is relatively cumbersome, and the operation time is long, so it is not easy to popularize

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