A new type of cover plate for inspection hole of screw earth excavator

Abstract

The invention provides a novel cover plate for a manhole of a spiral earth excavator. The plate comprises a barrel (1), in which a dredging port (2) is arranged. The dredging port (2) is provided with a cover plate (3) matching the dredging port. The novel cover plate is characterized in that a pair of cover plate guide grooves (4) matching the cover plate (3) is arranged on the barrel (1); end surfaces on two sides of the cover plate (3) are provided with racks (3a); the barrel (1) on one side of the cover plate guide grooves (4) is provided with gears (4a) connected with a motor through a driving shaft; and the bottoms of the cover plate guide grooves (4) are provided with through holes such that the gears (4a) are matched with the racks (3a).The novel cover plate for the manhole of the spiral earth excavator has following beneficial effects: the plate is simple in structure and convenient in operation; due to a novel structure, pressure on the cover plate is bore by the cover plate guide grooves arranged in the barrel of a screw conveyor in case of accidental spurt; and defects in the prior art are solved so that installation is carried out by avoiding manpower.

Description

Technical field: [0001] The invention relates to a clogging cover plate of an excavating machine, in particular to a new type cover plate of a manhole for a spiral earth-moving excavator. Background technique: [0002] In the earth pressure balance shield machine for subway construction, the screw conveyor is widely used as the excavated soil. The structure of the screw conveyor generally has the shaft type and the belt type. In most projects in the eastern part of the inland, the shaft screw machine, which is more beneficial to water resistance, is often used, and the excavation port is equipped with two gates at the end of the screw machine. The screw conveyor is driven by 3 hydraulic motors and is supplied by 2 variable pumps, which is easy to change speed and resistant to shocks. Configure the maximum output torque, maximum speed and theoretical excavation capacity of the screw machine as required. [0003] The structure of screw conveyor is currently divided into fixed type ...

AI Technical Summary

Problems solved by technology

[0008] However, in actual construction, since the end cover of the maintenance door of the existing model is designed as a flange cover bolt connection, whether it is the first type of fixed screw machine without a safety door for the soil bin or the second type with an earth bin The retractable screw machine safety gate of the safety door is not closed tightly (mechanism failure or blockage of stones and gravels, etc.), and mud, water and sand will leak out in case of unexpected accidents in the process of opening the screw machine discharge port for maintenance and blockage removal. However, the current design structure makes it difficult to close the maintenance door quickly, and even once a sudden leakage and gushing occurs, the pressure is so high that it is impossible to cover the cover at all, causing muddy water to flood into the front soil bin, flooding the tunnel and equipment, and serious ground subsidence, etc. catastrophic accident

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