Slurry shield cutter head washing system

Abstract

The invention relates to a slurry shield cutter head washing system. The slurry shield cutter head washing system comprises a water pump and spray nozzles, wherein the spray nozzles are distributed and installed on a slurry shield cutter head, the spray nozzles consist of middle spray nozzles and peripheral spray nozzles, the middle spray nozzles are installed at the side part of a fishtail cutter frame, the peripheral spray nozzles are distributed on the outer surface of a cutter arm of the slurry shield cutter head, the nozzle orifices of the peripheral spray nozzles face to the outer side of the slurry shield cutter head, U-shaped sheaths are arranged at the upper parts of the peripheral spray nozzles, the sheaths are welded on the slurry shield cutter head and the sheaths are welded with the slurry shield cutter head through high-wear-resistance electrodes, wherein the coating of the high-wear-resistance electrode is made of the following raw materials by weight percentage: 2-5 percent of vanadium iron nitride, 2-5 percent of chromium iron nitride, 2-5 percent of ferromanganese iron nitride, 5-10 percent of ferrotitanium, 5-10 percent of tungsten carbide, 5-10 percent of titanium carbide, 1-5 percent of cobalt carbide, 5-10 percent of ferrotungsten, 10-25 percent of metal manganese, 5-10 percent of ferroboron, 1-5 percent of monazite powder, 2-5 percent of nitrocellulose and balance of metal iron.

Description

technical field [0001] The invention relates to a muddy water shield cutterhead cleaning system, in particular to a muddywater shield cutterhead flushing system. Background technique [0002] In the mud-water shield construction, a nozzle is set in the center of the cutter head to pressurize the low-pressure mud in the mud-water circulation system, and the pressurized high-pressure mud passes through the nozzle to continuously wash the soil obliquely, so that it cannot be attached to the center of the cutter head, and then The effect of protecting the cutter and the cutterhead is achieved, but mud still accumulates on the cutterhead arm. Especially in the shield tunneling construction of the full-section expansive hard clay stratum, a large amount of soil is easy to accumulate on the cutter head arm, causing the cutter arm of the cutter head to be blocked. The spout is exposed on the cutterhead. Due to the high viscosity of the soil, the spout is easily blocked by the soil...

AI Technical Summary

Problems solved by technology

[0002] In the mud-water shield construction, a nozzle is set in the center of the cutter head to pressurize the low-pressure mud in the mud-water circulation system, and the pressurized high-pressure mud passes through the nozzle to continuously wash the soil obliquely, so that it cannot be attached to the center of the cutter head, and then The effect of protecting the cutter and cutterhead is achieved, but mud still accumulates on the cutterhead arm

Especially in the shield tunneling construction of the full-section expansive hard clay stratum, a large amount of soil is easy to accumulate on the cutterhead arm, causing the cutterhead arm to be blocked

The nozzle is exposed on the cutter head. Due to the high viscosity of the soil, the soil is easy to block the nozzle, and the attachments cannot be washed away. A large amount of sludge has accumulated on the cutter head, which greatly reduces the working efficiency of the cutter head.

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