High-temperature true triaxial rock testing machine

Abstract

The invention discloses a high-temperature true triaxial rock testing machine, belongs to rock mechanics experimental experiment and solves the technical problems of low heating temperature and small rock testing pieces of an existing testing machine. The high-temperature true triaxial rock testing machine comprises a rack, an axial loading oil cylinder, a heat preservation shell, a main engine, a thermal insulation plate, a power supply switch, a pressure-temperature-displacement control and measuring system and a pressure source, wherein the axial loading oil cylinder is arranged on a cross beam which is arranged at the top part of the rack; the main engine is arranged on a rack platform and is connected with the axial loading oil cylinder; the thermal insulation plate is arranged between the main engine and the rack platform. According to the high-temperature true triaxial rock testing machine disclosed by the invention, the bottom part of a pressure chamber of the main engine and the periphery of a rock testing piece cavity are provided with electrical heating pipes, the pressure chamber is used for heating the rock testing piece through metal heat conduction and fluid convection, and the heating speed is quick; the axial loading oil cylinder is connected to the pressure chamber through a cooling device, heat is insulated, and the temperature of the pressure chamber reaches not less than 400 DEG C; only the pressure chamber is coated by the heat preservation shell, the axial loading oil cylinder is located at the outer part of the heat preservation shell, the rock testing piece cavity can be designed according to a standard testing piece, and a high-temperature mechanical experiment of a large rock testing piece is completed.

Description

technical field [0001] The invention belongs to experimental equipment of rock mechanics, in particular to a high-temperature rock true triaxial experimental machine. Background technique [0002] Rock mechanics experiment is an important means to study various mechanical properties of rock, and it is the basis for supporting the development of rock mechanics. According to the loading method, the rock testing machine is divided into true triaxial testing machine and false triaxial testing machine. The real triaxial testing machine can apply compressive stress in three directions to the rock specimen, which can simulate the real rock in the formation. State of stress. The fake triaxial testing machine can only provide two mutually unequal pressures. The pressure in the direction of the two pressures is called the confining pressure, and the pressure that is different from the confining pressure and perpendicular to it is called the axial pressure. The triaxial testing machi...

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Problems solved by technology

[0004] The object of the present invention aims at overcoming the shortcoming of prior art, provides a kind of high-temperature true triaxial rock test machine, solves the low heating temperature of existing test machine, and the size of rock test piece is small, can't complete big rock test piece at higher temperature ( 200°C and above), the technical problems of mechanical experiments

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