Power transmission tower bolt pre-tightening force measuring probe and method with temperature compensation

A bolt pre-tightening force, transmission tower technology, applied in force/torque/power measuring instrument, measuring torque/torsion force during tightening, measuring device, etc., can solve problems such as difficult to meet the technical requirements of bolt health status monitoring, and achieve loading and unloading Convenient, Measuring Accurate Results

Active Publication Date: 2021-03-05
HENAN EPRI GAOKE GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent is only based on ultrasonic longitudinal wave single-wave signals, and the bolt stress measurement data needs to be calibrated to the reference state every time it is tightened, which is difficult to meet the technical requirements for the health status monitoring of bolts in service

Method used

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  • Power transmission tower bolt pre-tightening force measuring probe and method with temperature compensation
  • Power transmission tower bolt pre-tightening force measuring probe and method with temperature compensation
  • Power transmission tower bolt pre-tightening force measuring probe and method with temperature compensation

Examples

Experimental program
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Effect test

Embodiment 1

[0033] see figure 1 , a temperature-compensated power transmission tower bolt pre-tightening force measuring probe, comprising an aluminum alloy cylindrical shell 1 and a fixing ring 2 arranged in the shell 1, a temperature sensor 3, a cylindrical longitudinal wave ultrasonic piezoelectric ceramic chip 4, a cylindrical Shaped transverse wave ultrasonic piezoelectric ceramic chip 5, shell 1 protects the internal sensor; cylindrical transverse wave ultrasonic piezoelectric ceramic chip 5 is set in the middle of the shell 1 and fits with the bolt section, the transverse wave signal is 5-8MHz, and the cylindrical longitudinal wave ultrasonic pressure The electric ceramic chip 4 is arranged above the cylindrical transverse wave ultrasonic piezoelectric ceramic chip 5, and the longitudinal wave signal is 2-5 MHz;

[0034] The fixing ring 2 is set on the inner wall of the shell 1 and fixed with the bolts. The fixing ring 2 is a ring-shaped adsorption magnet, which is attracted to the...

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PUM

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Abstract

The invention discloses a power transmission tower bolt pre-tightening force measuring probe and method with temperature compensation, wherein the measuring probe comprises a shell, and a fixed ring,a temperature sensor, a cylindrical longitudinal wave ultrasonic piezoelectric ceramic wafer and a cylindrical transverse wave ultrasonic piezoelectric ceramic wafer which are arranged in the shell. The cylindrical transverse wave ultrasonic piezoelectric ceramic wafer is arranged in the middle in the shell and attached to a bolt, the cylindrical longitudinal wave ultrasonic piezoelectric ceramicwafer is arranged above the cylindrical transverse wave ultrasonic piezoelectric ceramic wafer, and the fixed ring is arranged on the inner wall of the shell and fixed to the bolt. The temperature sensor is arranged between the fixed ring and the cylindrical transverse wave ultrasonic piezoelectric ceramic wafer and makes contact with the bolt, and a backing is arranged in a gap in the shell. Thepower transmission tower bolt pre-tightening force measuring probe with temperature compensation is convenient to assemble and disassemble with a bolt to be measured, accurate in measurement and moresuitable for carrying out online real-time monitoring on the bolt pre-tightening force.

Description

technical field [0001] The invention belongs to the field of health monitoring of bolted connection structures of electric transmission towers, and in particular relates to a probe and method for measuring the pretightening force of bolts of electric transmission towers with temperature compensation based on the ultrasonic thermoacoustic elastic effect. Background technique [0002] The power transmission system is one of the important strategic projects of the country. The connection structure of the transmission tower is the key hardware carrier of the system. Its own service safety and reliability largely depend on the connection strength of the bolt structure. The stiffness and damping characteristics determine the static strength and dynamic strength characteristics of the overall structure of the transmission tower, and its stiffness and damping characteristics are closely related to the preload of the bolted structure. During the service stage after the pre-tightening...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/24
CPCG01L5/246
Inventor 张武能兰光宇汪毅张元吴克华张留斌王晓晨李金峰方堃张帅金俊魏利锋
Owner HENAN EPRI GAOKE GRP
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