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Corrugated pipe fatigue life test machine cramping apparatus

A fatigue life and corrugated pipe technology, applied in the field of fixtures used in testing machines, can solve the problems of scrapped corrugated pipes, affected material properties of corrugated pipes, incorrect test data, etc., and achieve the effect of convenient loading and unloading

Inactive Publication Date: 2008-03-12
徐浩然
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to quality problems in welding, such as air leakage; welding affects the material performance of the bellows, which makes the test data wrong; moreover, the bellows is scrapped after the test

Method used

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  • Corrugated pipe fatigue life test machine cramping apparatus

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] In the figure: 1 is the corrugated pipe to be tested, 2 is the gland, which is tightly connected with the tie rod 9; 3 is the sealing ring, which is used to fix and seal the bellows 1; 4 is the tension sleeve, which is used to compress the sealing ring 3; 5 7 is the middle seat; 8 is the fixture seat; 9 is the pull rod. When the pull rod 9 is pulled down, the gland 2 presses the tension sleeve 4 so that the sealing ring 3 is supported. Tighten the inner diameter of the bellows 1; 10, the spring, used to reset the pull rod; 11, the adjustment disc, used to adjust the upper and lower positions of the clamp seat and the pull rod, so as to adapt to bellows of different specifications; 12, the adjustment rod, used to drive the adjustment disc; 13. The limit plate is used to guide and limit the pull rod; 14. The support plate is used to support components such as the adjustment plate and the fixture seat; 15. The base acts as a support member; 16. The pull rod head is located ...

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Abstract

The invention relates to a testing machine for a corrugated pipe, in particular to a clamp for the testing machine. According to the design scheme provided in the invention, a lower base is provided with a clamping sleeve and a positioning sleeve, an end part holding the corrugated pipe and the space of a sealing ring are arranged between the clamping sleeve and the positioning sleeve, and the clamping sleeve is provided with a drive mechanism for driving the clamping sleeve to press the sealing ring. The interior of the lower base is provided a pull rod, and the upper end of the pull rod is connected with the clamping sleeve and the lower end stretches out of the lower base; a spring is arranged between the upper end of the lower base and the clamping sleeve. The invention can facilitate the test and improve the accuracy of the test.

Description

technical field [0001] The invention relates to a testing machine for bellows, in particular to a fixture used in the testing machine. Background technique [0002] The bellows fatigue life test is used to check whether the material and manufacturing process of the bellows meet the standard requirements for bellows tension and compression. During the test, special fixtures are required to clamp and seal both ends of the bellows. There is an air pressure of 0.1Mpa in the bellows. The bellows were stretched and compressed 150,000 times and the bellows were not broken, indicating that the tested bellows met the standard requirements. [0003] The structure of the fixture currently used is shown in Figure 2a and 2b. In Figure 2a, two waves are lost during the test due to the pressure plate pressing in the wave grooves at both ends, resulting in inaccurate test data. Figure 2b The corrugated pipe to be tested is welded on a copper plate and pressed with a pressure plate. Due ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/32G01M19/00G01M99/00
Inventor 徐浩然
Owner 徐浩然
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