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Clamping device of Leeb hardness tester for detecting hardness of pipeline

A Leeb hardness and clamping device technology, which is applied in the field of Leeb hardness tester clamping devices for pipe hardness testing, can solve problems such as consumption of elastic potential energy, overall elastic deformation, and low measurement results, so as to increase rigidity and prevent inaccurate Adherence, the effect of improving measurement accuracy

Pending Publication Date: 2018-04-06
JIANGSU FRONTIER ELECTRIC TECH +2
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Problems solved by technology

[0004] The main factors affecting the accuracy of Leeb hardness measurement are: the displacement or springing of the specimen during the measurement, which consumes the elastic potential energy stored in the specimen during the impact process, especially the mass of the specimen is too small and the overall rigidity is poor When the pipe specimen to be measured has too small wall thickness, too large pipe diameter, and poor local rigidity, the overall elastic deformation may also occur on the cross-section, which will also lead to low measurement results; the operating methods of the inspectors will also affect Uncertain impact on final test results

Method used

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  • Clamping device of Leeb hardness tester for detecting hardness of pipeline
  • Clamping device of Leeb hardness tester for detecting hardness of pipeline
  • Clamping device of Leeb hardness tester for detecting hardness of pipeline

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with specific examples.

[0021] A Leeb hardness tester clamping device for pipe hardness testing, comprising a pipe clamping and fixing part, a Leeb hardness tester fixing base, and a hardness tester sliding track block along the pipeline axis;

[0022] The clamping and fixing part of the pipeline includes a clamp body 6, a fixed baffle 7 on the lower side, a screw 9 passing through the fixed baffle 7, and a fixed V-shaped jaw 11 on the upper side, and the outer end of the screw 9 is a clip. Tightening wheel 8, the inner end is a movable clamping block 10, the position of the movable clamping block 10 is adjusted by rotating the clamping wheel 8, so as to tightly clamp the pipe;

[0023] The fixed base 12 of the Leeb hardness tester is tubular, and a gasket 14 is provided at the bottom thereof. The hole diameter of the spacer 14 is larger than the outer diameter of the conduit thread of the impact bod...

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Abstract

The invention discloses a clamping device of a Leeb hardness tester for detecting the hardness of a pipeline. The clamping device is mainly composed of three parts including a pipeline clamping and fixing part, a Leeb hardness tester fixing part and a sliding rail block for the hardness tester to axially slide along a pipeline. By adopting the device, the Leeb hardness tester can be firmly fixed on a detected pipeline and is used for supporting the pipeline very well, so that a phenomenon that the measurement accuracy is influenced through relative displacement or springing in a measurement process is prevented; meanwhile, the Leeb hardness tester can be strictly moved along the axial direction of the detected pipeline through a sliding rail, so that researches and analysis are convenientto carry out. By adopting the device disclosed by the invention, the measurement accuracy of the Leeb hardness tester can be effectively improved.

Description

technical field [0001] The invention relates to the field of measuring the Leeb hardness on the outer surface of a pipeline, in particular to a clamping device for a Leeb hardness gauge for pipeline hardness testing. Background technique [0002] Nowadays, the single unit capacity of thermal power plants continues to increase, the main steam pressure of ultra-supercritical units reaches above 26MPa, and the temperature exceeds 570°C. Therefore, higher requirements are put forward for the material properties of various parts of the generating unit. In the infrastructure and service process of thermal power plants, it is particularly important to carry out physical and chemical inspections on the quality of pipelines. Due to limited conditions, hardness testing is the main testing method, supplemented by metallographic testing. Due to various limitations of the portable Brinell hardness tester, Leeb hardness testing is mainly used for on-site hardness testing. [0003] Leeb h...

Claims

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Application Information

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IPC IPC(8): G01N3/02G01N3/04G01N3/06G01N3/52
CPCG01N3/02G01N3/04G01N3/062G01N3/52G01N2203/0274G01N2203/0605G01N2203/0076
Inventor 杨超孙雄王舒涛孙和泰马君鹏
Owner JIANGSU FRONTIER ELECTRIC TECH
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