Temperature-controllable portable multifunctional pressure chamber

Abstract

The invention relates to a temperature-controllable portable multifunctional pressure chamber, which is characterized in that a confining pressure chamber is connected with the oil source of an external confining pressure loading device by a confining-pressure oil inlet; an axial pressure chamber is connected with the oil source of an external axial pressure loading device by an axial pressure oil inlet; an axial pressure piston is arranged in the axial pressure chamber, and enters the confining pressure chamber after passing through the head cover of the confining pressure chamber; a sample cylinder is composed of a side wall, a base and an upper pressing board, wherein the base is provided with a porous disc, and samples are placed on the porous disc and then covered by a head cover; a spiral refrigerating-fluid circulating pipe winding the cavity of the confining pressure chamber and the base and the upper cover of the sample cylinder are internally carved twin-spiral refrigerating-fluid circulating slots respectively, and connected with an external refrigerating plant; temperature sensors arranged in the confining pressure chamber and on the base and the upper cover of the sample cylinder are respectively connected with an external temperature controller; the external temperature controller is connected with the external refrigerating plant, and the porous disc is connected with a water replenishing or drainage connector. The temperature-controllable portable multifunctional pressure chamber of the invention has the characteristics of accurate and independent multi-point temperature control and multifunction and is easy to carry, can be used with freeze thawing cycling testers, triaxial testers and CT scanners, and does not need to be performed installation and sample taking for many times and cause disturbances on samples, thereby simplifying the test process.

Description

technical field [0001] The invention relates to a temperature-controllable portable multifunctional pressure chamber. Background technique [0002] Frozen soil is a soil body whose temperature is equal to or below zero and contains ice. Permafrost is widely distributed in the world, accounting for about 50% of the total land area. To carry out engineering construction in permafrost regions, it is necessary to fully understand the basic physical and mechanical properties of permafrost. The external factors affecting the physical and mechanical properties of frozen soil mainly include temperature and load. When the temperature changes, the frozen soil will undergo frost heave or thaw settlement, and the internal structure of the soil will also change; when the external force load is applied to the frozen soil, the soil will be deformed or even destroyed. It is very important to place the sample in a temperature-controllable pressure chamber and use it together with a freeze...

AI Technical Summary

Problems solved by technology

It can be seen that the test process is very cumbersome, and it is necessary to install and take out the sample many times in one test, which will inevitably cause disturbance, and it is impossible to achieve real-time CT scanning observation

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