Multi-field coupling in-situ experimental instrument

Abstract

The invention relates to a multi-field coupling in-situ experimental instrument. The multi-field coupling in-situ experimental instrument comprises a pressure chamber, a pressure chamber upper cover and a pressure chamber lower cover, the sample sleeve is sleeved in the pressure chamber, the upper end of the sample sleeve is sleeved on an axial pressure transmission shaft of the upper cover of the pressure chamber, a pore pressure pipeline is arranged in the axial pressure transmission shaft, the lower end of the sample sleeve is sleeved on a convex middle shaft at the top of the lower cover of the pressure chamber, a pore pressure pipeline is arranged in the middle shaft, and the upper and lower pore pressure pipelines are communicated in the sample sleeve; the driver can drive the pressure sensor and the axial pressure transmission shaft to move downwards so as to apply axial pressure to the sample in the sample sleeve; the base is connected with the bottom of the pressure chamber lower cover; the confining pressure circulating system comprises a centrifugal pump, a confining pressure circulating pipeline and a flow guide pipe; and the temperature control system is arranged on the base. The device is compact in design, and has the advantages that the image resolution is remarkably improved, the X-ray energy utilization rate is improved, the image quality is improved, and the sample temperature is accurately controlled.

Description

technical field [0001] The invention relates to the technical field of in-situ experimental instrument equipment, in particular to a multi-field coupling in-situ experimental instrument. Background technique [0002] The multi-field coupled in-situ experimenter based on CT scanning technology can apply axial pressure, confining pressure and pore pressure to the sample to control the stress state of the sample, measure the seepage characteristics of the sample by controlling the pore pressure at the inlet and outlet, control the temperature of the sample, and use CT imaging The technique analyzes sample strain and shape changes to analyze the mechanical, seepage and other physical properties of the sample. [0003] However, the current in-situ experimental instrument adopts flange connection between the pressure chamber and the upper and lower covers of the pressure chamber, so that the outer diameter of the upper and lower ends of the pressure chamber is too large, thereby i...

AI Technical Summary

Problems solved by technology

[0003] However, the pressure chamber of the current in-situ experimental instrument adopts a flange connection method between the upper and lower covers of the pressure chamber, which makes the outer diameter of the upper and lower ends of the pressure chamber too large, thereby increasing the distance between the X-ray source, the sample and the receiver. Result in lower image resolution, longer scan times, impact image quality, and prevent efficient use of CT scanners

At the same time, due to the lack of circulation structure, the current in-situ experimental instrument still has the problem of difficult temperature control, which leads to large temperature inhomogeneity inside the sample, which seriously affects the credibility of the data.

Images