Variable angle loading testing machine

Patent metadata

Field	Value
Publication number	US-11287356-B1
Application number	US-202117474204-A
Country	US
Kind code	B1
Filing date	Sep 14, 2021
Priority date	Jul 19, 2021
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

A variable angle loading testing machine is provided, which may include a bottom plate and a base fixedly connected to the bottom plate. A rock-sample accommodating cavity is formed in the base, and a rectangle-shaped sample is suitable for being placed into the rock-sample accommodating cavity. A side of the base is fixedly connected to two arc-shaped tension beams arranged in parallel, and a variable angle loading mechanism is slidably connected between the two arc-shaped tension beams. Through-holes are formed on the base, and an output end of the variable angle loading mechanism abuts against the rectangle-shaped sample through one of the through-holes. Loading and unloading of a stress with variable direction and magnitude under excavation disturbance can be simulated, which is of great significance for understanding mechanical behaviors of rock-soil mass under excavation disturbance.

First claim

What is claimed is:

1. A variable angle loading testing machine, comprising: a bottom plate and a base fixedly connected to the bottom plate;
wherein a rock-sample accommodating cavity is formed in the base, and the rock-sample accommodating cavity is configured to be placed a rectangle-shaped sample therein;
wherein a side of the base is fixedly connected to two arc-shaped tension beams arranged in parallel, a variable angle loading mechanism is slidably connected between the two arc-shaped tension beams; and
wherein through-holes are formed on the base, and an output end of the variable angle loading mechanism is configured to abut against the rectangle-shaped sample through one of the through-holes.

2. The variable angle loading testing machine according to claim 1 , wherein the variable angle loading mechanism comprises a first pressure cylinder slidably connected between the two arc-shaped tension beams, and an output end of the first pressure cylinder is fixedly connected with a pressure pad;
wherein a side of the pressure pad away from the first pressure cylinder is fixedly connected to a side of a load sensor, another side of the load sensor is fixedly connected to a round indenter, and the round indenter is configured to abut against the rectangle-shaped sample; and
wherein piston cylinders are symmetrically hinged on the first pressure cylinder, each of the piston cylinders is located between the two arc-shaped tension beams, and each of the piston cylinders is hinged to the two arc-shaped tension beams.

3. The variable angle loading testing machine according to claim 2 , wherein a first pressure plate and a plurality of second pressure plates are configured to be fixedly connected to an outside of the rectangle-shaped sample, and the plurality of second pressure plates abut against the rock-sample accommodating cavity, a side of the first pressure plate away from the rectangle-shaped sample is provided with an arc-shaped groove matched with the round indenter, and the round indenter abuts against the arc-shaped groove.

4. The variable angle loading testing machine according to claim 3 , wherein a side of the first pressure cylinder away from the pressure pad is fixedly connected to two pulling plates, a side of the first pressure cylinder close to the pressure pad is fixedly connected to supporting plates, and the two arc-shaped tension beams are located between the supporting plates and the two pulling plates; and
wherein ends of the two pulling plate and the supporting plates are rotatably connected with rollers, and the rollers are slidably engaged with the arc-shaped tension beam.

5. The variable angle loading testing machine according to claim 3 , wherein rotating sleeves are arranged between the two arc-shaped tension beams, the rotating sleeves are rotatably connected to the two arc-shaped tension beams, and the piston cylinders are rotatably connected to the two arc-shaped tension beams through the rotating sleeves respectively.

6. The variable angle loading testing machine according to claim 3 , wherein both sides of the first pressure cylinder are fixedly connected to articulated bases respectively, and output ends of the piston cylinders are hinged with the first pressure cylinder through the articulated bases respectively.

7. The variable angle loading testing machine according to claim 4 , wherein the through-holes comprise: a first through-hole, a second through-hole, a fourth through-hole, a fifth through-hole and a sixth through-hole;
wherein the second through-hole, the fourth through-hole, the fifth through-hole and the sixth through-hole are located in a same plane; and axes of the second through-hole, the fourth through-hole, the fifth through-hole and the sixth through-hole are all perpendicular to an axis of the first through-hole;
wherein directional loading mechanisms are respectively arranged in the second through-hole, the fourth through-hole, the fifth through-hole and the sixth through-hole; and the directional loading mechanism arranged in the sixth through-hole is fixedly connected to the bottom plate;
wherein output ends of the directional loading mechanisms abut against the second pressure plates; and
wherein the variable angle loading mechanism abuts against the first pressure plate through the first through-hole.

8. The variable angle loading testing machine according to claim 7 , wherein each of the directional loading mechanisms comprises a second pressure cylinder, a piston end of the second pressure cylinder is fixedly connected to a second pressure pad; and
wherein a side of the second pressure pad away from the second pressure cylinder is fixedly connected to a side of a second load sensor, another side of the second load sensor is fixedly connected to a ball seat, an end of the ball seat away from the second load sensor is fixedly connected to a joint, and the joint abuts against the second pressure plate.

9. The variable angle loading testing machine according to claim 8 , wherein a third through-hole is formed on a side of the base away from the first through-hole, the third through-hole is coaxial with the first through-hole, and the third through-hole is communicated with the rock-sample accommodating cavity;
wherein the bottom plate is fixedly connected to supporting pillars, an end of each of the supporting pillars away from the bottom plate is fixedly connected to a lower beam, a side of the base away from the arc-shaped tension beams is fixedly connected to columns, and an end of each of the columns away from the base is fixedly connected to the lower beam; and
wherein the lower beam is provided with a mounting hole, a directional loading mechanism is installed in the mounting hole and an output end thereof abuts against the second pressure plate through the third through-hole.

10. The variable angle loading testing machine according to claim 8 , wherein each of the first pressure cylinder and the second pressure cylinders is mounted a displacement sensor thereon.

Assignees

• Inst Geology & Geophysics Cas

Inventors

• Guo Songfeng
• Qi Shengwen
• Cai Ming
• Shang Yanjun
• Hao Qingze
• Zhao Haijun
• Cui Zhendong
• Xue Lei
• Wang Xueliang
• Zhang Zhaobin
• Huang Xiaolin
• Liang Ning
• Zheng Bowen
• Zou Yu
• Wang Xin
• Hou Xiaokun
• Song Shuaihua
• Xiong Feng
• Li Yongchao
• Ma Lina
• Tang Fengjiao
• Wang Xin
• Jiang Libo
• Li Jinxuan
• Xiao Yidong

Classifications

• G01N2203/04

  Chucks, fixtures, jaws, holders or anvils · CPC title

• G01N2203/0258

  Non axial, i.e. the forces not being applied along an axis of symmetry of the specimen · CPC title

• G01N2203/0044

  Pneumatic means · CPC title

• G01N2203/0026

  Combination of several types of applied forces · CPC title

• G01N2203/0019

  Compressive · CPC title