A method for removing and repairing reusable expansion bolts

A technology of expansion bolts and repair methods, which is applied in the direction of manufacturing tools and hand-held tools, etc., can solve the problems that expansion bolts are difficult to remove and cannot be reused, and achieve the effects of reasonable and reliable process design, low cost, and reduced damage

Active Publication Date: 2019-01-22
CHINA RAILWAY NO 17 BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems that existing expansion bolts are difficult to dismantle and cannot be reused after dismantling, the present invention provides a method for dismantling and repairing reusable expansion bolts

Method used

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  • A method for removing and repairing reusable expansion bolts
  • A method for removing and repairing reusable expansion bolts
  • A method for removing and repairing reusable expansion bolts

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Embodiment Construction

[0013] A method for removing and repairing reusable expansion bolts, characterized in that: the following steps are adopted:

[0014] a. Make reusable expansion bolts. The reusable expansion bolts include a screw 1 and an expansion tube 2 sleeved on its outside. The left end of the screw 1 is provided with a nut 3 threaded with it, and the right end of the screw 1 is provided with a right diameter The tapered boss 4 that is larger than the diameter on the left side and greater than the inner diameter of the expansion tube 2, the left end of the expansion tube 2 is provided with a gasket I5 that is integrated with it and is located outside it, and the outer wall of the expansion tube 2 is provided with a pad that is located on the right side of the gasket I5 and outside it. The gasket II7 whose diameter is larger than the inner diameter of the installation hole 6, the outer diameter of the gasket I5 is larger than the outer diameter of the gasket II7, the right end side wall of ...

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Abstract

The invention provides a dismounting and repairing method of a reusable expansion bolt. The problem that an existing expansion bolt is not easy to dismount and cannot be repeatedly utilized after being dismounted is solved. The dismounting and repairing method comprises the steps that (a) the reusable expansion bolt is manufactured; (b) a nut is screwed to be flush with the left end of a screw, the head portion of the screw is hammered, the screw retreats from an expansion tube, and the nut is screwed down from the screw; (c) a dismounting mechanism is manufactured; (d) a prying handle is pressed down with double hands to make a prying head clamp the expansion tube, and the expansion tube can be pulled out of an installing hole; (e) a repairing mechanism is manufactured; (f) the expansion tube is put in a semi-cylindrical groove, a construction worker turns an operating handle to drive a gear and a rack to move towards the left side, and meanwhile a cylindrical ejection rod enters a cavity of the expansion tube for repair. The dismounting and repairing method ensures no hard damage and stress uniformity of the fixing surface of the installing hole, repeated utilization of repaired bolts is achieved, and lots of costs are saved.

Description

technical field [0001] The invention relates to a technology for removing and repairing fasteners, in particular to a method for removing and repairing reusable expansion bolts. Background technique [0002] An expansion bolt is an anchoring device that can be drilled and installed on existing buildings. When installing, put the expansion bolt into the drilled hole of the existing building, pull the screw outward by tightening the nut, and the iron tube with the cut end will be passively opened outward, so that the cone head of the screw exerts a force perpendicular to the hole on the iron tube. The normal pressure of the wall, thereby generating a certain pull-out force, to achieve the purpose of anchoring. [0003] Due to the cheap price and convenient installation of expansion bolts, they are very popular in engineering circles. But it is undeniable that the existing expansion bolts have the problem of difficulty in dismantling, which makes the exposed bolt shafts diffi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25B27/02
CPCB25B27/02
Inventor 王新民马瑞华李刚戴志勇李浩宇杨帆高娃
Owner CHINA RAILWAY NO 17 BUREAU GRP
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