Combined spiral conveyor used in high-water-pressure mixed stratum

Abstract

The invention discloses a combined spiral conveyor for a high-water-pressure mixed stratum, which comprises a belt spiral conveyor and a shaft type spiral conveyor mounted on one side of the belt spiral conveyor; when a shield advances in the high-water-pressure mixed stratum, the belt spiral conveyor can discharge large-particle gravels as much as possible, a limiting grating is arranged at an inlet of the shaft type spiral conveyor to prevent the large-particle gravels from entering the shaft type spiral conveyor; after it is found that large particles are accumulated to a certain degree through an observation opening at the belt type spiral conveyor, the large particles are discharged into a slag car through a first slag outlet at the tail end of the belt type spiral conveyor; the shaft type spiral conveyor is mainly used for discharging small particles; a soil plug is formed in a cylinder body to resist the gushing phenomenon under the action of high water pressure, discharged muck is conveyed out through a belt conveyor, large-particle pebbles can be discharged as much as possible to reduce abrasion of the spiral conveyor; and meanwhile, the soil plug can be effectively formed, the length of the spiral conveyor is increased, and the gushing phenomenon is prevented.

Description

technical field [0001] The patent of the present invention relates to the technical field of earth pressure shield tunneling muck transportation equipment, in particular, it relates to a combined screw conveyor used in high water pressure mixed formations. Background technique [0002] The screw conveyor is an important part of the earth pressure balance shield. It is mainly used to smoothly discharge the muck in the soil bin, and then transport it out through the belt conveyor and dregs truck. [0003] There are two main types of screw conveyors. One is the axial screw conveyor, which is suitable for water-rich strata and fine-grained strata. By forming a "soil plug" to balance the pressure in the soil bin, it prevents water and soil from gushing in the screw conveyor. The other is a belt-type screw machine, which can discharge larger slag particles, which reduces the wear on the screw shaft and screw blades, but it is not easy to form "soil plugs" and easily cause gushing....

AI Technical Summary

Problems solved by technology

[0003] There are two main types of screw conveyors. One is the axial screw conveyor, which is suitable for water-rich strata and fine-grained strata. By forming a "soil plug" to balance the pressure in the soil bin, it prevents water and soil from gushing in the screw conveyor. The other is a belt-type screw machine, which can discharge larger slag particles, which reduces the wear on the screw shaft and screw blades, but it is not easy to form "soil plugs" and easily cause gushing. Both types of screw machines are suitable for The formation has certain applicability. The shaft screw machine can discharge smaller soil particles, but it can effectively prevent the occurrence of gushing phenomenon. The belt screw machine is suitable for large particle formation, but it is not easy to form "soil plug", which is easy to appear Soil gushing

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