A magnetic chuck device for recording the repair status of steel bridge cracks

Abstract

The invention discloses a magnetic chuck device used for recording the crack repairing states of a steel bridge. The device comprises an elastic telescopic mechanism, a slider-crank mechanism, a built-in permanent magnet, a rotary plate mechanism and a magnetic attraction base; the elastic telescopic mechanism can drive the built-in permanent magnet to rotate; the rotary plate mechanism comprisesa rotary plate, a cover board and a rotary column; the rotary plate device is arranged at the top of the magnetic base; the magnetic base comprises a center magnetizer, a copper board and an arc shell; a guide rail is arranged inside the magnetic base; and the center magnetizer is a soft magnetic material and formed by splicing two pieces, and the two pieces are spaced by a copper board which is not magnetically conductive. The need for recording the different crack repairing states in the steel bridge is simplified, the magnetic telescopic mechanism controls the direction of the built-in permanent magnet, magnetization and demagnetization of the bottom of the magnetic base are achieved, and the whole device can be attracted to the position, nearby cracks, of a steel board conveniently. The changes of visible colors of fluorescent paster are achieved by rotating the rotary column, and the different crack repairing states are recorded by color changes.

Description

technical field [0001] The invention belongs to the technical field of steel bridge crack maintenance and follow-up tracking, and relates to a magnetic sucker device for recording the repair status of steel bridge cracks. Background technique [0002] Orthotropic steel bridge decks are widely used in the construction of long-span bridges due to their advantages such as high torsional rigidity, high strength, light weight, and good integrity. However, due to the complex structure of the steel bridge structure and numerous welds, defects are prone to occur inside it, and fatigue cracking is very easy to occur under repeated vehicle loads. In order to prevent structural problems during the operation of the steel bridge, it is necessary to maintain and repair the cracked parts in a timely manner, and follow up regularly to further repair or replace local components for cracks that re-cracked after repair. [0003] However, due to the complex structure of the real bridge tunnel,...

AI Technical Summary

Problems solved by technology

However, the steel bridge itself vibrates greatly and there is a lot of dust in the bridge cavity. The post-it notes will fail due to the decrease of adhesion force for a period of time. If the same crack is tracked many times in a short period of time, it is necessary to paste post-it notes on the cracks many times, which usually leads to crack information. repetitive, redundant

Images