Low-temperature high-pressure three-axle creep testing instrument

A triaxial creep, low temperature and high pressure technology, applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems of no creep experimental equipment, large energy loss, high operating costs, and achieve no danger and work. The effect of stable pressure and convenient operation

Inactive Publication Date: 2005-04-27
COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] For a long time, people have used hydraulic servo material testing machines for this test, and there is no special creep test equipment.
However, there are many disadvantages in using the hydraulic servo material testing machine for this work: 1. It can only do the ...

Method used

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  • Low-temperature high-pressure three-axle creep testing instrument
  • Low-temperature high-pressure three-axle creep testing instrument

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Embodiment Construction

[0013] A low-temperature and high-pressure triaxial creep tester, including a main machine, a refrigeration system 22, a hydraulic pressure stabilized oil source system 23, and a data acquisition and processing system 24. The main machine test tank 1 is located on the support 2, and the side wall of the test tank 1 is made of high The high-strength seamless steel pipe is integrally finished. The upper part of the test tank 1 is equipped with an upper pressure rod 17, and the lower part is equipped with an axial pressure piston 8. The test sample 11 is between the axial pressure piston 8 and the upper pressure rod 17. The upper end of the upper pressure rod 17 is provided with an axial pressure sensor and an output 16, and is respectively provided with a dust-proof ring 19 and an "O" type sealing ring 20 with the test tank body 1, and the upper pressure rod 17 is fixed by a nut 18; An "O"-shaped seal ring 20 is provided between the axial pressurization piston 8 and the test tank...

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Abstract

The present invention relates to engineering material test instrument, and is especially one kind of low temperature high pressure three-axis creepage test instrument. The instrument includes system unit, refrigerating system, stable pressure hydraulic oil source system and data acquisition and processing system. The test tank of the system unit set on support has inside upper pressure rod, lower axial pressurizing piston with lower part communicated with the stable pressure hydraulic oil source system via the axial pressure loader, inside communicated with the stable pressure hydraulic oil source system via the peripheral pressure loader, and refrigerating compressing tube connected with refrigerating system. All the measuring sensors are connected separately with the data acquisition and processing system. The present invention may be used in completing single- and three-axis creepage and strength test at normal or low temperature.

Description

technical field [0001] The invention relates to the field of engineering material testing instruments, in particular to a low-temperature, high-pressure triaxial creep testing instrument. Background technique [0002] my country is the third largest country in the world with permafrost and seasonal permafrost accounting for 20% and 55% of the country's land area, respectively. Various projects (transportation, energy, water conservancy, communication, etc.) in permafrost regions are increasing day by day. Therefore, it is more and more important to carry out extensive and in-depth research and development in the fields of permafrost and permafrost engineering. In addition, with the strengthening of national power and the development of the national economy, the increase of national investment, the launch of major projects in cold regions, and the excavation of deep foundation pits by artificial freezing method, experimental parameters of frozen soil mechanics indicators are...

Claims

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Application Information

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IPC IPC(8): G01N3/10
Inventor 常小晓马巍程国栋赖远明
Owner COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
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