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Dynamic tri-axial experiment device with ultrasonic scanning function for hydrate deposit of natural gas and method

A technology of hydrate sediment and ultrasonic scanning, which is applied in the direction of applying stable tension/pressure to test the strength of materials, and achieves the effect of fast and effective positioning, simple operation and simple structure

Pending Publication Date: 2019-05-14
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

When the sample is disassembled, a relatively loose gas hydrate sediment sample may be obtained, but the cracks and damage patterns generated during the test become a blind spot in the test process

Method used

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  • Dynamic tri-axial experiment device with ultrasonic scanning function for hydrate deposit of natural gas and method
  • Dynamic tri-axial experiment device with ultrasonic scanning function for hydrate deposit of natural gas and method
  • Dynamic tri-axial experiment device with ultrasonic scanning function for hydrate deposit of natural gas and method

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Embodiment Construction

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0030] Such as figure 1 As shown, the embodiment of the present invention provides a dynamic triaxial experimental device for natural gas hydrate deposits with ultrasonic scanning, including: a dynamic triaxial pressure chamber 26, respectively located above and below the dynamic triaxial pressure chamber 26 Top cover 1 and base 17.

[0031] The dynamic triaxial pressure chamber 26 includes an upper end cover 3 , a lower end cover 8 and a cylinder body 21 , and the lower end cover 8 is fixed on the base 17 through the lower vertical shaft 16 . A sample table 5 is provided in the cylinder body 21, and an upper indenter 4 and a lower indenter 6 are respectively arranged on the top and bottom of the sample table 5, and a sample is added in the sample table...

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Abstract

The invention discloses a dynamic tri-axial experiment device with an ultrasonic scanning function for hydrate deposit of natural gas and a method. The device comprises a dynamic tri-axial pressure chamber, wherein the dynamic tri-axial pressure chamber comprises an upper end cover, a cylinder and a lower end cover, the cylinder is internally provided with a sample table for loading a sample, an upper press head and a lower press head are respectively arranged above and below the sample table, the upper press head is connected with a hydraulic pump station, the sample is dynamically loaded byusing the upper press head, the upper press head and the lower press head are respectively provided with a sound wave receiving device and a sound wave emitting device that are used for longitudinal and transverse wave tests on the sample, the lower press head is further provided with an electrode that is used for specific resistance tests on the sample, the lower end cover is provided with an ultrasonic wave scanning device and an annular rail, the ultrasonic wave scanning device moves around the sample table along the annular rail, so as to perform ultrasonic wave scanning on the sample. Thedynamic tri-axial experiment device has a simple structure, is convenient to operate, has high reliability, has an ultrasonic scanning function, and can rapidly record and position a crack of the sample and damage morphology of the sample in mechanical tests.

Description

technical field [0001] The invention relates to the technical field of dynamic triaxial experimental devices, in particular to a dynamic triaxial experimental device for natural gas hydrate deposits with ultrasonic scanning. Real-time recording and scanning of tiny cracks and damage patterns generated by sediments. Background technique [0002] About 27% of the land (mainly in permafrost) and 90% of the sea contain gas hydrates. Gas hydrate deposits experience complex stress environments in complex engineering. When the load reaches a certain level, the inside of the sample will Some tiny cracks appear. Often these tiny cracks have a great influence on the mechanical properties of gas hydrate deposits. [0003] In order to understand the mechanical properties of natural gas hydrate, we can start with the conventional triaxial compression experiment. However, the conventional triaxial compression experiment can only simulate the stress of the sample under the static load. S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12
CPCY02A90/30
Inventor 胡维宁伏龙刘志超王冬冬张凌刘天乐欧文佳
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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