Device and method for diagnosing loose bolts at connection nodes of transmission tower rods

A technology for loosening bolts and connecting nodes. It is applied to electromagnetic measuring devices, measuring devices, and deformation measurement of electric/magnetic solids. It can solve the problems of time-consuming and laborious manual inspection, large number of node bolts, and bolt loosening failure, so as to avoid manual inspection. , to avoid threats to personal safety and to avoid costly effects

Active Publication Date: 2021-07-16
STATE GRID HUBEI ELECTRIC POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a device and method for diagnosing the bolt looseness of the connection node of the transmission tower rod, which can realize the real-time strain response monitoring near the node bolt of the transmission tower, and realize the intelligent diagnosis of the bolt looseness and failure, so as to overcome the problems of the existing transmission tower The number of node bolts is huge, and manual detection of time-consuming and labor-intensive defects can effectively solve the problems of node bolt detection, operation and maintenance

Method used

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  • Device and method for diagnosing loose bolts at connection nodes of transmission tower rods
  • Device and method for diagnosing loose bolts at connection nodes of transmission tower rods
  • Device and method for diagnosing loose bolts at connection nodes of transmission tower rods

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Effect test

Embodiment 1

[0062] Embodiment 1: When the connection node of the pole material of the transmission tower is a K-shaped node connected by a vertical or horizontal auxiliary material and an oblique pole material, such as figure 2 and image 3 As shown, at this time, the rods 13 are connected by connecting steel plates 6 and a plurality of node bolts 4 distributed on the connecting steel plates 6, and two piezoelectric film strain gauges 2 are installed at the connecting nodes, and the two piezoelectric film strain gauges The sheets 2 are vertically distributed to each other, and the piezoelectric material sheets 2-1 are bonded to the connecting steel plate 6 by strong glue, and each piezoelectric film strain gauge 2 is provided with a plastic protective cover 3 outside, and the plastic protective cover 3 is glued to Connect or fix it by fastening the bolts, and the connecting wire 2-2 of the piezoelectric film strain gauge 2 is drawn out from the protective cover 3.

[0063] Implementatio...

Embodiment 3

[0064] Embodiment 3: When the connection nodes of transmission tower rods are complex nodes connected by vertical main materials, horizontal auxiliary materials and oblique rods, such as Figure 5 As shown, the rods are connected by connecting steel plates 6 and node bolt groups distributed on the connecting steel plates 6, and four piezoelectric film strain gauges 2 are installed at the connecting nodes, and the four piezoelectric film strain gauges 2 are perpendicular to each other and Arranged in the middle of the bolt group connecting the steel plate 6 in a rectangular shape, each piezoelectric film strain gauge 2 is provided with a plastic protective cover 3 outside, and the plastic protective cover 3 is fixed by bonding or fastening the bolts, and the piezoelectric film strain gauge 2 connecting lead 2-2 is drawn from protective cover 3.

[0065] The following is a detailed description of the bolt loosening diagnosis process of the bolt loosening diagnostic module for th...

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Abstract

The invention discloses a device and a method for diagnosing the loosening of bolts at connection nodes of transmission tower rods. The device for diagnosing bolt looseness at the pole connection node of the transmission tower includes a strain data acquisition device, a wireless sensor network system, a bolt looseness diagnosis module and a diagnosis result display terminal; at least two strain data acquisition devices are installed on the pole connection node of the transmission tower Near the node bolts, it is used to collect real-time strain response data at the joints of the rods, and transmit it to the bolt loosening diagnosis module through the wireless sensor network system. The bolt loosening diagnosis module judges the failure of the bolt loosening, and finally displays the terminal through the diagnosis results. Bolt loose failure diagnosis results. The invention realizes intelligent diagnosis of bolt looseness and failure, avoids manual detection that consumes a lot of manpower and material resources, and effectively solves the problems of node bolt detection, operation and maintenance.

Description

technical field [0001] The invention belongs to the technical field of transmission tower structure engineering, and in particular relates to an intelligent diagnosis device and method for bolt loosening of connection nodes of transmission tower rods based on wireless piezoelectric strain monitoring. Background technique [0002] In engineering structures, bolts often play the role of connecting rods. Because of their advantages such as simple construction and easy maintenance, they are widely used in transmission tower structures. The reliability of the bolted connection is closely related to the operation safety of the transmission line, so the working performance of the bolts connected by the rod is very important for the safe operation of the transmission tower structure. [0003] Under the action of wind load, ice and snow load or earthquake load, etc., the wires of the transmission line will vibrate or even dance, making the structure of the transmission tower bear var...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00G01B7/16
CPCG01B7/16G01M13/00
Inventor 周学明胡丹晖张耀东毕如玉李小华冯志强付剑津史天如黄泽琦刘继承余希洋
Owner STATE GRID HUBEI ELECTRIC POWER RES INST
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