Wear-resistant gauge protection tearing cutter

Abstract

The invention discloses a wear-resisting gauge protection tearing cutter. The wear-resisting gauge protection tearing cutter comprises a cutter body and an alloy cutter head fixed to the head of the cutter body; at least one groove is formed in the upper surface of the cutter body and the positions close to the two sides of the cutter body correspondingly; the sides, close to the corresponding side walls of the cutter body, of the grooves are open; alloy blocks are fixedly arranged in the grooves, and the upper surfaces of the alloy blocks are flush with the upper surface of the cutter body; alloy plates detachably connected with the corresponding alloy blocks are arranged on the two sides of the cutter body correspondingly, the length directions of the alloy plates extend in the length direction of the side walls of the cutter body and are tightly attached to the corresponding side walls of the cutter body; and the upper edges of the alloy plates are flush with the upper surface of the cutter body, and the width of the alloy plates is less than or equal to the thickness of the cutter body. The wear-resisting gauge protection tearing cutter is resistant to abrasion and long in service life, the cutter changing frequency can be reduced, the tunneling excavation efficiency is improved, and unnecessary energy consumption caused by frequent starting and stopping of the shield tunneling machine is avoided.

Description

Technical field [0001] The invention relates to an earth pressure balance shield machine tool, in particular to a wear-resistant gauge tearing knife. Background technique [0002] In the process of tunnel excavation using the earth pressure balance shield machine, the geology is found to be a sand and pebble stratum, with a large amount of pebbles, a large particle size and mixed with sand. This stratum leads to severe tool wear, especially for gauges. Tearing knife. The gauge knife is installed on the outermost side of the cutter head to ensure the excavation diameter of the cutter head. If the gauge knife is severely worn, the excavation diameter of the cutter head cannot be guaranteed, and the shield shell of the shield machine will be stuck, the thrust will increase, and the tube segment will be broken. , Resulting in engineering accidents. Although timely replacement of the gauge tearing knife can avoid such accidents, and because the existing gauge tearing knife usually u...

AI Technical Summary

Problems solved by technology

The gauge knife is installed on the outermost side of the cutterhead to ensure the excavation diameter of the cutterhead. If the gauge knife is severely worn, the excavation diameter of the cutterhead cannot be guaranteed, and the shield shell of the shield machine will be stuck, the thrust will increase, and the segments will break , resulting in engineering accidents

Timely replacement of the gauge tearing knife can avoid such accidents, but because the existing gauge tearing knife usually uses an alloy cutter head in the cutter head, but the blade part is rubbed by the hard rocks of the formation due to the rotation of the cutter head. Rapid wear and high frequency of tool changes reduce tunnel excavation efficiency, and the high frequency of start and stop of shield machines also leads to unnecessary energy consumption

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