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

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...

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 creep test under normal temperature and single axis; 2. The creep test needs to run for a long time, and the hydraulic servo material testing machine will consume A large amount of energy such as electricity and water has high operating costs; 3. The cost of instruments is high

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