Dynamic tri-axial experiment device and method measuring dynamic strain of hydrate deposit of natural gas

A technology of hydrate sediment and experimental device, which is applied in the field of dynamic triaxial experimental device, can solve the problems of not being able to truly and accurately reflect the strain of natural gas hydrate sediment, the limited accuracy of LVDT and displacement sensor, etc., and achieves simple structure and applicability. Powerful, easy-to-use effects

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

[0004] In the dynamic triaxial compression experiment, the strain of natural gas hydrate is collected, and the displacement sensor and LVDT are generally used to collect the strain, but the accuracy of LVDT and displacement sensor is extremely limited, and sometimes it cannot truly and accurately reflect the strain of gas hydrate deposits

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  • Dynamic tri-axial experiment device and method measuring dynamic strain of hydrate deposit of natural gas
  • Dynamic tri-axial experiment device and method measuring dynamic strain of hydrate deposit of natural gas
  • Dynamic tri-axial experiment device and method measuring dynamic strain of hydrate deposit of natural gas

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Embodiment Construction

[0038] 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.

[0039] Such as figure 1 As shown, the embodiment of the present invention provides a dynamic triaxial experimental device for measuring the strain of natural gas hydrate deposits, including: a cylinder 24, an upper end cover 3 and a lower end cover 10 respectively connected to the upper and lower ends of the cylinder 24 , the sample stage 5 arranged in the cylinder body 24, the upper indenter 4 and the lower indenter 8 respectively connected to the upper and lower ends of the sample stage 5, and the strain gauge 15 attached to the sample.

[0040] The bottom of the upper pressing head 4 is provided with a first temperature sensor 12, the first pressure sensor 13 and an acoustic wave receiving device 14, and the top of the lower pressing head 8 is provide...

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Abstract

The invention discloses a dynamic tri-axial experiment device and method measuring dynamic strain of hydrate deposit of natural gas. The device comprises a cylinder, an upper end cover and a lower endcover, a sample table, an upper press head and a lower press head, wherein the lower press head supports a sample, the upper press head is connected with a hydraulic pump station, the sample is dynamically loaded by vibrating 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, the lowerpress head is further provided with an electrode, the lower end cover is provided with a lower end cover male adapter, two ends of the lower end cover male adapter are respectively connected with a strain sheet female adapter and a lower end cover female adapter, a rubber sleeve sleeved around the sample is provided with a strain sheet, and strain data measured by the strain sheet is transferred to the strain sheet female adapter, the lower end cover male adapter and the lower end cover female adapter in sequence, and is transmitted out through the lower end cover female adapter. The dynamic tri-axial experiment device has a simple structure, is easy to operate, has high reliability, and can accurately measure axial strain and circumferential strain of hydrate deposit of natural gas.

Description

technical field [0001] The invention relates to the technical field of dynamic triaxial experimental devices, in particular to a dynamic triaxial experimental device and method for measuring the dynamic strain of natural gas hydrate deposits. The tiny strains produced by the hydrate deposits are measured. Background technique [0002] Natural gas hydrate, also known as "combustible ice", is an extremely clean energy source. Many problems will be encountered in the mining process. It is necessary to understand the mechanical properties of hydrate. [0003] In-situ testing and indoor sample methods are generally used to study the mechanical properties of natural gas hydrates. Due to the difficulty of in-situ sampling, laboratory synthesis of natural gas hydrates for indoor testing is a better choice. Conventional triaxial compression instruments are generally used to measure mechanical properties, but conventional triaxial compression experiments can only simulate the stress ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12
Inventor 胡维宁伏龙刘志超彭力
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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