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An orthotropic steel bridge deck fatigue crack detection equipment and its use method

A technology for steel bridge decks and fatigue cracks, which is used in measuring devices, analyzing solids using sonic/ultrasonic/infrasonic waves, and using sonic/ultrasonic/infrasonic waves for material analysis, etc. Lateral movement, etc.

Active Publication Date: 2021-04-16
SOUTHWEST JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical application, due to various factors such as the environment of the structure, load changes, and production technology, fatigue cracks often occur on orthotropic steel bridge decks. After large fatigue cracks appear, traffic needs to be interrupted for maintenance and reinforcement, which is harmful to the society. cause greater impact
At present, the fatigue crack detection of existing orthotropic steel deck bridges is mainly carried out manually in the steel box girder. The detection efficiency is low, the manipulation space is small, and the fatigue cracks cannot be detected comprehensively and timely.
[0003] Existing orthotropic bridge deck testing equipment mainly uses a crawler-type magnetic wheel mechanism as the walking system, for example, the invention patent with the publication number of CN106950286B discloses a self-propelled trolley for ultrasonic testing of weld seams on the top plate of steel bridge decks; The invention patent No. CN111021244A discloses an intelligent orthotropic steel bridge deck fatigue crack detection robot, and for example, the invention patent with the publication number CN109613010A discloses an orthotropic steel bridge deck fatigue crack detection system, but the above-mentioned system While walking, the ultrasonic probe is used for detection, but the track wheel will vibrate the steel structure to a certain extent, which will affect the accuracy of ultrasonic detection; another way is to use a smooth permanent magnet wheel, such as the invention patent with the publication number CN110824011B, published A device for fatigue crack detection of orthotropic deck is developed. The ultrasonic probe carried by the device is used to inspect the fatigue crack of orthotropic steel bridge deck, but the device can only detect one U-rib of the orthotropic deck. The weld seam on one side of the groove cannot realize automatic lateral movement, and the existing inspection equipment cannot start from the end of a steel box girder to the end of the other side

Method used

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  • An orthotropic steel bridge deck fatigue crack detection equipment and its use method
  • An orthotropic steel bridge deck fatigue crack detection equipment and its use method
  • An orthotropic steel bridge deck fatigue crack detection equipment and its use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Such as Figure 1 to Figure 14 As shown, an orthotropic steel bridge deck fatigue crack detection equipment of the present invention includes a walking assembly 1 and a detection platform assembly 2, and the walking assembly 1 includes an active traveling mechanism 45, a passive traveling mechanism 49 and a third driving mechanism 44, The active traveling mechanism 45 and the passive traveling mechanism 49 are all arc-shaped structures, and the tops at both ends of the active traveling mechanism 45 and the passive traveling mechanism 49 are provided with electromagnets 46, and the transmission shaft 48 of the third driving mechanism 44 runs through the passive The running gear 49 is threadedly connected with the active running gear 45, and when the third driving mechanism 44 drives the transmission shaft 48 to rotate, the active running gear 45 can move closer or far away from the passive running gear 49;

[0057] The detection platform assembly 2 includes a first suppo...

Embodiment 2

[0061] On the basis of embodiment 1, there are two passive running gears 49, and the active running gear 45 is located between the two passive running gears 49; the active running gear 45 and the passive running gear 49 all include a fixed plate 52, two A connecting arm 50 and two fixing heads 51, the two connecting arms 50 are hollow structures, one end of the two connecting arms 50 is connected to both sides of the fixing plate 52, and the other end is connected to the fixing head 51, the whole is arc Shaped structure, the electromagnet 46 is located at the top of the fixed head 51, the first support plate 14 of the detection platform assembly 2 is located at the top of each fixed plate 52; the third drive mechanism 44 is located at the top of one of the passive traveling mechanisms 49 On the side wall, the transmission shaft 48 of the third driving mechanism 44 runs through the fixed plate 52 of the active running mechanism 45 and the passive running mechanism 49 in sequence...

Embodiment 3

[0063] On the basis of Embodiment 2, the top of the track square pipe 12 is also provided with a first slide rail 42, and the top of the first slide rail 42 is provided with a first slide block 16 matching it, and the first slide block 16 It can slide on the first slide rail 42 along the direction of the first slide rail 42 , and the top of the first slide block 16 is connected with the bottom of the second support plate 17 .

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Abstract

The invention discloses fatigue crack detection equipment for orthotropic steel bridge decks, which includes a walking assembly and a detection platform assembly. The walking assembly includes an active walking mechanism, a passive walking mechanism and a third driving mechanism. The active walking mechanism and the passive The traveling mechanisms are all arc-shaped structures, and electromagnets are arranged on the tops of both ends of the active traveling mechanism and the passive traveling mechanism. When the mechanism drives the transmission shaft to rotate, the active traveling mechanism can move closer to or move away from the passive traveling mechanism. The invention realizes the automatic detection of the fatigue cracks of the orthotropic plate by carrying a phased array ultrasonic detector, and at the same time, can reduce the vibration of the equipment and improve the detection accuracy during the movement process on the orthotropic steel bridge surface.

Description

technical field [0001] The invention relates to the technical field of fatigue crack detection of orthotropic steel bridge decks, in particular to fatigue crack detection equipment for orthotropic steel bridge decks. Background technique [0002] Orthotropic steel bridge decks have outstanding advantages such as light weight, high bearing capacity, and wide applicability, and are widely used in bridge engineering. Since the stiffness of the structure is different in the longitudinal and transverse directions of the bridge, the anisotropy of the structure is caused. In practical application, due to various factors such as the environment of the structure, load changes, and production technology, fatigue cracks often occur on orthotropic steel bridge decks. After large fatigue cracks appear, traffic needs to be interrupted for maintenance and reinforcement, which is harmful to the society. cause greater impact. At present, the fatigue crack detection of existing orthotropic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04G01N29/265E01D19/10B62D57/02
CPCB62D57/02E01D19/106G01N29/04G01N29/265
Inventor 勾红叶韩冰王君明华辉蒲黔辉赵天祺钟子城李金耀
Owner SOUTHWEST JIAOTONG UNIV
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