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Detecting device and method for pipeline wall thickness

A detection device and detection method technology, applied in the field of ultrasonic detection, can solve the problems of high cost, complex structure, opening holes, etc., and achieve the effect of convenient operation, low cost and simple process

Inactive Publication Date: 2007-10-10
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of the buffer rods proposed by these methods need to penetrate into the container to monitor the high-temperature fluid in the equipment, which also involves the problem of opening holes; some require a special coupling device between the buffer rod and the high-temperature object to achieve measurement. Complex structure and high cost

Method used

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Examples

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Embodiment 1

[0032] The lower end of the measuring rod 5 is welded on a flat circular plate (simulated pipeline). Both the measuring rod 5 and the circular plate are made of 20 steel. The diameter of the measuring rod 5 is 19 mm, the length is 150 mm, and the surface is sprayed with 1Cr18Ni9Ti stainless steel coating. Coating thickness 0.5mm. After calibration, the selected ultrasonic velocity is 5800 m / s; the thickness of the selected circular plate measured by a precision caliper is 15.7 millimeters, and the measuring rod 5 is welded on the circular plate with the welding rod of the same material. After welding, the upper end surface of the measuring rod to The distance between the upper surface of the circular plate is 151.4mm (including the weld seam of 1.4mm). Fix the probe positioning block 7 with the countersunk head screw 8 at 4-6 mm from the end of the measuring rod 5, place the probe 10 in the central stepped hole 15 of the probe positioning block 7, and fit the upper end of the ...

Embodiment 2

[0035] Based on Example 1, a cooling assembly is installed in the middle of the measuring rod 5; the sleeve 5 is a seamless steel pipe with an outer diameter of 57mm and a wall thickness of 3.5mm, equipped with an end cover 2 and a gland 1, and on the sleeve 5 The water inlet pipe interface 6 and the water outlet pipe interface 6' of the cooling water are set on the wall of the cylinder, and the cooling water circulation system is connected externally, and the cooling length is designed to be 50mm; Water flow 25m 3 / h, the temperature of the end surface of the measuring rod 5 is 40°C; in order to calibrate the sound velocity of the system under this temperature environment, set the sound velocity so that the measured H value is 15.7mm (remaining the same as implementation 1). Then, another set of testing devices with the same size welded measuring rods but with a circular plate thickness of 19.5 mm is installed with the same water circulation cooling system and heating system....

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Abstract

A detection device of wall thickness on pipe consists of signal collection unit formed by measurement pole and step form ultrasonic wave probe, and ultrasonic wave detection system. Its detecting method includes making material of measurement pole be as the same with material of pipe to be detected and welding one end of measurement pole directly on pipe wall detection point of pipe to be detected.

Description

technical field [0001] The invention relates to ultrasonic detection technology, specifically a detection device and detection method for measuring the wall thickness of pipelines using ultrasonic technology, especially a detection device and detection method for high-temperature and high-pressure pipelines. The main classification number of the international patent is intended to be Int. ). Background technique [0002] The wall thickness of the pipe is related to the safety of its application, so the detection of the pipe wall thickness is of great significance no matter in the production process or in the use process. Relatively speaking, the detection of pipe wall thickness during use is more important and technically more difficult. [0003] Corrosion detection is a detection method of pipeline wall thickness, which can realize the measurement of pipeline wall thickness indirectly. The total or average amount of , it is difficult to correspond to the change of the loc...

Claims

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Application Information

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IPC IPC(8): G01B17/02
Inventor 高炳军赵斌苏秀苹李金红赤俊祥何燕张雅超张国勇
Owner HEBEI UNIV OF TECH
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