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Portable temporary manhole closing device for bridge maintenance

A closed device and portable technology, which is applied in the field of bridge inspection and maintenance manhole covers, can solve the problems of deteriorating bridge inspection and maintenance work environment, poor ventilation inside the box girder, and difficulty in implementation, and achieve simple, convenient and economic benefits, prevent high-altitude falling incidents, Easy to carry effects

Inactive Publication Date: 2019-04-12
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are a large number of bridges in actual work that have not installed the above-mentioned type of manhole cover, and it is very uneconomical and difficult to implement the above-mentioned device for each bridge that has a manhole. Closed, it will cause poor ventilation inside the box girder, block light from entering the bridge, and deteriorate the inspection and maintenance work environment in the bridge

Method used

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  • Portable temporary manhole closing device for bridge maintenance
  • Portable temporary manhole closing device for bridge maintenance
  • Portable temporary manhole closing device for bridge maintenance

Examples

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Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the drawings.

[0019] figure 2 It is a structural top view of the portable bridge maintenance floor manhole temporary closing device according to the present invention when it is in a folded storage state. The portable bridge maintenance and repair floor manhole temporary closing device of the present invention can be brought into the bridge by bridge maintenance personnel through the manhole when it is in the folded storage state. After entering the bridge, manipulate the upper composite support rod 2 to move to both sides. While the upper composite support rod 2 moves to both sides, it will drive the two ends of the lower composite support rod 10 to move through the bolts 5, thereby making the folded state The lower composite support rod 10 rotates around the hinge 9, and the upper composite support rod 2 is continuously pulled to both sides until the lower composite support rod 10 chan...

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Abstract

The invention discloses a portable temporary manhole closing device for bridge maintenance. The portable temporary manhole closing device comprises an upper combined supporting rod layer, a lower combined supporting rod layer, ropes, rope expansion devices and a vertical supporting rod. The upper combined supporting rod layer and the lower combined supporting rod layer are connected by bolts and can rotate around bolts; the lower combined supporting rod layer comprises two groups of foldable rod pieces provided with hinges at axial centers; the rod pieces can rotate around the hinges to be folded inwards, so that the device is convenient to contain and carry. After the device is unfolded, the upper combined supporting rods and the lower combined supporting rods form a quadrangular frame tobe supported around the manhole in the bridge base slab, the vertical supporting rod arranged on the lower surface of the lower combined supporting rod layer is tightly attached to the inner wall ofthe manhole so as to achieve an effect of fixing the device, the ropes on the rope expansion devices of the upper and lower combined supporting rods are arranged in the quadrangular frame in a criss-cross manner, and the anti-falling effect is achieved.

Description

Technical field [0001] The invention relates to the field of bridge maintenance, in particular to a manhole cover for bridge maintenance. Background technique [0002] When inspecting and repairing a bridge with a manhole at the bottom, maintenance personnel are usually required to enter the bridge through the manhole at the bottom plate to perform inspection and repair operations. After the operators entered the bridge through the manhole, due to the narrow space inside the bridge, and most of the maintenance personnel focused on observing the diseases on the inner wall of the bridge during work, they neglected to observe the feet, and the personnel fell from a high altitude when moving near the manhole risk. The existing method is to install a fixed manhole cover at the bottom plate manhole. For example, the Chinese utility model patent with the announcement number CN203452097U discloses "a manhole cover for bridge maintenance", which protects the safety of the operators insi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 李永义孙海鹏张明
Owner NANJING UNIV OF TECH
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