A horizontal freezing tube extubation device

Abstract

The invention discloses a horizontal frozen tube extubation device, comprising a wire rope, a hoist, a tube extubator support, a first fixed pulley and a second fixed pulley; On the facade, the first fixed pulley is installed on the second end of the tube extubator bracket; the second fixed pulley is installed on the flange of the horizontal freezing tube freezer to be pulled out; The freezer flange of the horizontal freezing pipe to be pulled out is fixedly connected, and the other end of the wire rope goes around the first fixed pulley and the second fixed pulley in turn and is wound on the drum of the hoist; when the wire rope When the horizontal freezing tube freezer flange is to be pulled out by tensioning and pulling, the tube extractor bracket is pressed against the vertical surface of the ground connecting wall structure. The force point of the horizontal freezing tube extubation device provided by the invention is completely separated from the scaffold and the working platform, so as to avoid the deformation and collapse of the scaffold construction platform due to the force.

Description

technical field [0001] The invention relates to the technical field of frozen tube extubation, in particular to a horizontal frozen tube extubation device. Background technique [0002] Municipal subway projects are generally counted by bidding section. According to the bidding method and common practice, generally a unit will win no more than 2 adjacent bidding sections. There is a construction end well structure between different bidding sections, and the shield is hoisted, lowered, and received. , The origination is carried out through the end well. In the area of ​​water-bearing sand layer, it is generally necessary to freeze due to geological reasons, including the freezing of vertical holes on the ground and the construction of horizontal holes at the end well. The construction and removal of the frozen pipe shall be carried out within the scope. In recent years, no-extraction technology has been developed, and PVC pipes are used to replace the freezing of seamless s...

AI Technical Summary

Problems solved by technology

[0004] (1) High risk: whether it is chain hoist, electric hoist or fixed pulley, it is directly fixed on the scaffold, and the scaffold is mainly a platform built for high-altitude workers to facilitate high-altitude operations. If the friction resistance in the frozen wall is too high Large, the wire rope pulling force will pull the scaffold to the direction of the ground and the wall or even bend it; and if the hoist is used with the fixed pulley for construction, once it is "over-rolled", the entire scaffold will be easily pulled down

Therefore, this way of extubation makes the construction personnel on the scaffold platform have higher personal risks

[0005] 2) In terms of technology: the position distribution of the frozen tubes to be removed is generally circular, while the scaffolding space is square. In the actual tube removal, it cannot be guaranteed that each frozen tube is aligned with the fixed pulley or hoist attached to the scaffold along the axis. As a result, considerable eccentricity occurs during extubation

At this time, in addition to resisting the friction resistance generated by the frozen wall and the ground connection wall, the pulling force also needs to overcome the bending moment caused by eccentricity, which will increase the difficulty of pulling the tube

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