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How to make a shaftless screw conveyor

A technology of screw conveyor and manufacturing method, which is applied in the direction of packaging, etc., can solve the problems of difficult discharge of steel bars and concrete slag fragments, direct cutting of reinforced concrete without considering the shield, and achieve the effect of reducing damage

Active Publication Date: 2016-04-13
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the design and manufacture of the conventional shaftless screw conveyor does not take into account the working condition of the shield directly cutting reinforced concrete, it is difficult to ideally discharge the steel bars and concrete slag fragments, especially when the cutting contains more, For large-diameter pile foundations with thicker steel bars

Method used

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  • How to make a shaftless screw conveyor

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Embodiment Construction

[0020] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0021] This embodiment is a shaftless screw conveyor manufactured in conjunction with the shield cutting of 14 large-diameter bridge pile foundation projects on Suzhou Rail Transit Line 2. The left and right lines of the project respectively cut 7 drills with a diameter of 1000 to 1200 mm in full section. Hole pouring pile, main reinforcement Φ20-22mm, concrete strength C30.

[0022] The method includes the following steps:

[0023] According to the allowable space inside the shield machine, the diameter of the inner wall of the screw conveyor cylinder 1 is taken to a maximum value of 670mm;

[0024] Assuming that the largest possible external dimension of the concrete fragment is 30cm, the pitch L of the screw blade...

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Abstract

The invention discloses an improvement method for a shaftless screw conveyor in the field of screw conveyors. The improvement method includes: determining the diameter of the inner wall of a screw conveyor barrel; determining screw pitch; changing section shaft of a screw; additionally paving a wear-resistant surfacing layer on the outer surface of the screw; adding a wear-resistant grille to the inner wall of the barrel located in the front within 2mm; strictly controlling gap distance between the wear-resistant grille layer on the inner wall of the barrel and the wear-resistant surfacing layer on the screw; increasing rated torque of the screw conveyor; adding grouting heads on a shell of the screw conveyor barrel; adding observation holes on the barrel. The improvement method has the advantages that the improved shaftless screw conveyor can discharge irregular thick bar reinforcements and large-sized broken concrete smoothly, self damage of the screw conveyor can be reduced, and coping capacity in case that the screw conveyor is stuck by the bar reinforcements is realized.

Description

technical field [0001] The invention belongs to the field of screw conveyors, in particular to a manufacturing method of a shaftless screw conveyor. Background technique [0002] The shield tunneling method is widely used in the construction of rail transit in major cities in my country due to its many advantages such as fast excavation, little impact on the stratum and surrounding environment, and high mechanical degree. With the continuous construction and densification of the line, it is increasingly unavoidable to encounter underground obstacles such as pile foundations of existing buildings (structures) during the shield excavation process. As an international cutting-edge technology, shield directly cutting piles has significant advantages such as saving engineering investment, reducing the impact on the surrounding environment, and shortening the construction period compared with traditional methods such as removing piles from the superstructure and manually digging p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65G33/14B65G33/26B65G33/24
Inventor 袁大军王占生丁洲祥穆永江李海
Owner BEIJING JIAOTONG UNIV
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