Tunnel boring machine cutterhead for assisting rock breaking through high-pressure water jet

Abstract

The invention provides a tunnel boring machine cutterhead for assisting rock breaking through a high-pressure water jet. The cutterhead comprises a cutterhead body, a first hob assembly, a second hobassembly and a scraper, wherein the first hob assembly, the second hob assembly and the scraper are arranged on the cutterhead body. Each of the first hob assembly and the second hob assembly comprises a rotating shaft and a plurality of hobs arranged on the rotating shaft. The scraper is plowshare-shaped, a spray pipe used for introducing high-pressure water is arranged on the cutter head body and located below the scraper, a pair of spray heads is arranged at the end of the spray pipe, and the included angle between the spray direction of the spray heads and the surface of the cutter head body is 30 degrees. The rotating areas of the first hob assembly and the second hob assembly are intersected. The first hob assembly is provided with hobs which move along the spraying track of each spray head on the tunnel face. According to the cutterhead, the scraper, the hob and the high-pressure water jet are mutually combined to efficiently crush the tunnel face in the tunneling process, so that the service life of the scraper and the hob can be prolonged, and the tunneling efficiency of the tunnel is greatly improved.

Description

technical field [0001] The invention relates to the technical field of roadheading machine equipment, in particular to a tunnel boring machine cutter head with high-pressure water jet assisting rock breaking. Background technique [0002] Tunnel boring machine is a continuous operation with mechanical crushing of rocks, excavation and support. It is a factory-like assembly line tunnel construction equipment integrating mechanical, electrical, hydraulic, optical, and gas systems. The equipment consists of a front shield, a support shield, and a telescopic shield. , stop shield, knife plate, and rear supporting components. According to the cutting process of the roadheader on the working face, it is divided into full-section roadheader and partial-section roadheader. According to different principles of rock crushing, it can be divided into rolling type (disc hob) roadheader and milling type roadheader. Most of the Chinese products are roller-type full-face roadheaders, whic...

AI Technical Summary

Problems solved by technology

During the excavation process of the tunnel boring machine, the hob rubs against the rock and heats up, and the temperature can reach more than 300 degrees, which increases the wear of the hob and shortens its life. It needs to be replaced after about 300-500 meters, and the cost of the tool accounts for a relatively high proportion of the total cost.

The cutter head is subjected to high-intensity impact load during the excavation process, and the vibration is very severe, leading to premature damage and failure of key components, damage to the main bearing, shortened mechanical life, and rock cracks also seriously affect the excavation speed and construction speed. It is reported that it is the highest in my country. The monthly excavation has reached 1209.8 meters, and the efficiency is not very high

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