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Pipe stress detection method

A detection method and pipe technology, applied in the field of detection, can solve the problems of inability to satisfy people, low detection efficiency, cumbersome detection methods, etc., and achieve the effects of less resource consumption, simple operation and high measurement accuracy

Inactive Publication Date: 2018-03-23
江苏建纬检验检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the connection of pipes and pipes, the connection part, as the most stress-bearing part and the most critical part of the connection, often receives extensive attention. Therefore, after the pipe is manufactured, the stress test of the end is often carried out to determine whether it can meet the national standard. However, , the existing detection methods are cumbersome, resulting in low detection efficiency and unable to meet people's needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for detecting pipe stress, comprising the steps of:

[0023] 1) Measure the pipe with unit length as the detection object;

[0024] 2) Select one end of the pipe for detection, and evenly paste several strain gauges on the inner side of the detection end of the pipe, and keep the distance between the strain gauges and the strain gauges equal;

[0025] 3) Apply a force equal to the number of strain gauges on the outside of the detection end, and keep the distance between each force point equal, and the magnitude of the force is equal;

[0026] 4) Continue to apply force until the deformation of the tube under force can be observed with the naked eye;

[0027] 5) Stress values ​​detected at each point when recording deformation.

[0028] Among them, the unit length in step 1) is 3m. According to the experiment, the length will have an impact on the stress. After the length is greater than 3m, the stress tends to be stable. 3m is the minimum limit of the stress,...

Embodiment 2

[0030] A method for detecting pipe stress, comprising the steps of:

[0031] 1) Measure the pipe with unit length as the detection object;

[0032] 2) Select one end of the pipe for detection, and evenly paste several strain gauges on the inner side of the detection end of the pipe, and keep the distance between the strain gauges and the strain gauges equal;

[0033] 3) Apply a force equal to the number of strain gauges on the outside of the detection end, and keep the distance between each force point equal, and the magnitude of the force is equal;

[0034] 4) Continue to apply force until the deformation of the tube under force can be observed with the naked eye;

[0035] 5) Stress values ​​detected at each point when recording deformation.

[0036] Among them, the unit length in step 1) is 5m. According to the experiment, the length will have an impact on the stress. After the length is greater than 3m, the stress tends to be stable. 3m is the minimum limit of the stress,...

Embodiment 3

[0038] A method for detecting pipe stress, comprising the steps of:

[0039] 1) Measure the pipe with unit length as the detection object;

[0040] 2) Select one end of the pipe for detection, and evenly paste several strain gauges on the inner side of the detection end of the pipe, and keep the distance between the strain gauges and the strain gauges equal;

[0041] 3) Apply a force equal to the number of strain gauges on the outside of the detection end, and keep the distance between each force point equal, and the magnitude of the force is equal;

[0042] 4) Continue to apply force until the deformation of the tube under force can be observed with the naked eye;

[0043] 5) Stress values ​​detected at each point when recording deformation.

[0044] Among them, the unit length in step 1) is 4m. According to the experiment, the length will have an impact on the stress. After the length is greater than 3m, the stress tends to be stable. 3m is the minimum limit of the stress,...

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Abstract

The invention discloses a pipe stress detection method and relates to the field of stress detection methods. The pipe stress detection method includes the steps of 1) measuring the pipe length per unit as a detection object; 2) selecting one end of the pipe for detection, attaching a plurality of strain gauges uniformly onto the inner side of the detection end portion of the pipe, and keeping thedistance among the strain gauges equal; 3) applying forces with the number equal to the number of strain gauges to the outer side of the detection end and keeping the distances among the force receiving points equal and the forces equal in magnitude; 4) applying the forces continuously until the deformation at the force receiving part of the pipe can be observed by naked eyes; and 5) recording thedetected stress value at each point during deformation.

Description

technical field [0001] The invention belongs to the field of detection methods, in particular to a detection method of pipe stress. Background technique [0002] Pipes are necessary materials for construction projects. Commonly used are water supply pipes, drainage pipes, gas pipes, heating pipes, wire conduits, rainwater pipes, etc. With the development of science and technology, the pipes used in home decoration have also experienced the development process of ordinary cast iron pipe→cement pipe→reinforced concrete pipe, asbestos cement pipe→ductile iron pipe, galvanized steel pipe→plastic pipe and aluminum-plastic composite pipe. In the connection of pipes and pipes, the connection part, as the most stress-bearing part and the most critical part of the connection, often receives extensive attention. Therefore, after the pipe is manufactured, the stress test of the end is often carried out to determine whether it can meet the national standard. However, , the existing det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00
CPCG01L5/00
Inventor 褚家于刘成沙云
Owner 江苏建纬检验检测有限公司