US 11,815,496 B2
Rock mechanics triaxial testing machine has shaft pressure driving piece and lifting mechanism driving inner pressure chamber to lift
Shouding Li, Beijing (CN); Xiao Li, Beijing (CN); Zhongming Zhou, Beijing (CN); and Bo Zheng, Beijing (CN)
Assigned to INSTITUTE OF GEOLOGY AND GEOPHYSICS, CHINESE ACADEMY OF SCIENCES, Beijing (CN)
Filed by INSTITUTE OF GEOLOGY AND GEOPHYSICS, CHINESE ACADEMY OF SCIENCES, Beijing (CN)
Filed on Sep. 21, 2021, as Appl. No. 17/480,772.
Claims priority of application No. 202011165010.2 (CN), filed on Oct. 27, 2020.
Prior Publication US 2022/0128441 A1, Apr. 28, 2022
Int. Cl. G01N 3/12 (2006.01); G01N 3/36 (2006.01); G01N 3/08 (2006.01)
CPC G01N 3/12 (2013.01) [G01N 3/36 (2013.01); G01N 2203/0019 (2013.01); G01N 2203/0048 (2013.01); G01N 2203/0256 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A rock mechanics triaxial testing machine, comprising:
an outer pressure chamber and an inner pressure chamber located inside the outer pressure chamber, wherein a side wall of the inner pressure chamber is provided with a communication hole for communicating with the outer pressure chamber;
an upper pressure head and a lower pressure head which is placeable inside the inner pressure chamber;
an axial pressure driving member, wherein the axial pressure driving member is configured to drive the upper pressure head and lower pressure head to approach each other for squeezing the rock sample;
an axial deformation sensor for detecting axial compressed deformation of the rock sample;
a radial deformation sensor for detecting radial expansive deformation of the rock sample;
a lifting mechanism, wherein the lifting mechanism is configured to drive the inner pressure chamber to rise and fall,
wherein an axial pressure through hole is defined on a bottom wall of the inner pressure chamber,
the axial pressure driving member comprises a telescopic oil cylinder, and a piston of the telescopic oil cylinder is configured to pass through the axial pressure through hole to squeeze the lower pressure head.