Shield tool

A technology of shield cutters and shield cutterheads, which is applied in mining equipment, earthwork drilling, tunnels, etc., can solve problems affecting the construction of mud-water shields and the consolidation of mud cakes in the central area, so as to prevent sedimentation and mud formation, Prevent sedimentation and solve the effect of mud cake consolidation

Active Publication Date: 2018-05-04
SHANGHAI TUNNEL ENG CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art, provide a shield cutting tool, and solve the problem that the hob on the existing shield cutting head is prone to solidification of mud cake in the central area, which affects the construction of the mud-water shield.

Method used

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] refer to Figure 4 , The present invention provides a shield cutter, which is used to solve the problem in the prior art that the hob is arranged in the center area of ​​the cutter head, and mud cake consolidation is likely to occur in the center area, which affects the muddy water shield construction. The shield cutter of the present invention is provided with a middle knife, a first blade and a second blade, and the first blade and the second blade are positioned at both sides of the middle knife, a first gap is formed between the first blade and the middle knife, and the second A second gap is formed between the blade and the middle knife, and the first gap and the second gap are used as conveying channels for soil particles, and the setting direction of the first gap and the second gap is set at a set angle, so that the central area ...

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Abstract

The invention relates to a shield tool. The shield tool is mounted in a center area of a shield cutter disc, the shield tool comprises a cutter barrel, a middle cutter, a first cutter blade and a second cutter blade; the surface of the cutter barrel forms a mounting face, the middle cutter is fixedly arranged on the mounting face and is provided with the first side and the second side, wherein thefirst side and the second side are opposite; the first cutter blade is fixedly arranged on the mounting face and located on the first side of the middle cutter, a first gap is formed between the first cutter blade and the middle cutter in a reserved mode, the second cutter blade is fixedly arranged on the mounting face and located on the second side of the middle cutter, and a second gap is formed between the second cutter blade and the middle cutter in a reserved mode; and a set included angle is formed between the set direction of the second gap and the set direction of the first gap. The shield tool has the functions of soil cutting and stirring, and further has the function of transporting middle soil outwards, so that the effect of preventing soil particles from settling and solidifying into mud at the center of the cutter disc is achieved.

Description

technical field [0001] The invention relates to the field of shield tunneling, in particular to a shield cutter. Background technique [0002] With the increasing population of large cities in my country and the increasing load of ground transportation facilities, the development and utilization of underground space has become the focus of urban planning and design personnel, and the shield method is also widely used in urban rail transit projects. In the construction of shield tunneling in the Yangtze River Basin, Pearl River Basin and other areas, the argillaceous sandstone formation is one of the common crossing geology. In the construction of shield tunneling in this type of stratum, due to reasons such as the large diameter of the shield cutter head, small opening ratio, and low linear velocity in the central area, the fine sand particles and debris cut by the cutter head re-accumulated in the cutter head cabin and The resulting semi-consolidated or consolidated block ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/08E21D9/12
CPCE21D9/08E21D9/12
Inventor 王志华李鸿王胜勇裘华魏林春王皖胡俊张光辉姚力
Owner SHANGHAI TUNNEL ENG CO LTD
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