An anti-impact shield machine scraper

Abstract

The invention discloses an anti-impact shield tunneling machine scraper. The anti-impact shield tunneling machine scraper comprises a scraper base, a scraper body and a rear press block, a U-shaped groove is formed in the front of the scraper base, a slant plane is arranged in the back of the scraper base, a press block groove is formed in the bottom face of the scraper base and comprises an arranging part and fixing parts, the arranging part is arranged at the portion, located at one end of the U-shaped groove, of the bottom of the scraper base, the fixing parts are arranged at the bottom faces of the two side parts of the U-shaped groove, the tail of the scraper body is inserted into the U-shaped groove, a locating groove is formed in the bottom face of the tail of the scraper body, a press block fixing hole is further formed in the bottom face of the tail of the scraper body, the rear press block is arranged at the bottom of the scraper base and comprises a base and wedge-shaped ribs arranged at the top face of the base, the base is arranged on the arranging part, and the wedge-shaped ribs are inserted into the fixing parts and the locating groove. The anti-impact shield tunneling machine scraper is good in anti-impact capability, a connecting bolt cannot be damaged even if the connecting bolt is overloaded at a low frequency, the overall structure is simple and reliable, and the anti-impact shield tunneling machine scraper is convenient to dismantle and install and high in maintenance efficiency.

Description

technical field [0001] The invention relates to the technical field of shield machines, in particular to an impact-resistant shield machine scraper. Background technique [0002] The full name of the shield machine is the shield tunnel boring machine, which is a special construction machine for tunnel boring. After continuous improvement and development, it has become the most advanced underground tunnel boring machine in the world. It integrates mechanical, electrical, hydraulic, sensing, and information technologies, and can operate without affecting ground conditions. Compared with traditional construction methods, it greatly improves construction efficiency and safety, and reduces costs. It is widely used in subways, Railway, highway, municipal, hydropower and other tunnel projects. During the tunneling process, the shield machine realizes the deflection of the shield body within a certain angle range by controlling the expansion and contraction of the hinged cylinder, ...

AI Technical Summary

Problems solved by technology

[0003] The complex working conditions of the shield construction are generally harsh, and the wear and failure of the scraper is inevitable. During the construction process, the cutter often needs to be replaced. However, due to the limitations of the working environment and working principle of the shield machine, the operating environment of the cutter A more stable structure and a more convenient installation method are required, while the traditional scraper has a complex installation structure, inconvenient disassembly, and limited impact resistance, which is prone to falling off

If the tool is damaged or falls off during the operation, it will greatly affect the progress of the operation

[0004] An invention patent with the publication number CN204646243U discloses a new type of combined shield scraper, which is mainly composed of a scraper body, an alloy body, a wear-resistant layer, bolts, and a knife seat fixed on the panel of the cutter head. It is characterized in that : the scraper body is fixed on the knife seat through bolt connection, the back of the scraper body is provided with a limiting boss, a positioning installation groove and a positioning groove, and the knife seat is provided with a limiting protrusion matching the positioning installation groove The platform and the clamping boss matched with the positioning groove, the invention designs a plurality of mounting countersunk holes on the scraper body, and a plurality of bolt holes corresponding to the counterbore holes of the knife body are designed on the knife seat, and the knife body and the knife seat Two matching grooves and bosses are designed respectively. The knife body is fastened to the knife seat by bolts. However, the frontal impact of the working knife tip will easily cause the failure of the connecting bolts, making the scraper installation not firm and easy to be damaged and fall off. The problem

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