CN-224216637-U - Measure and contain experimental cushion device of biax of chamber structure acoustic emission location

Abstract

The utility model relates to the field of rock mechanics tests and nondestructive tests, in particular to a double-shaft test cushion block device for measuring acoustic emission positioning of a structure containing a cavity, which comprises a connecting bottom plate and also comprises a cushion block, wherein connecting holes are formed in the inner sides of the cushion block, a sleeve is fixedly arranged in the connecting holes, a movable block is arranged in the sleeve, a movable rod is fixedly arranged on the movable block, one end of the movable rod, which is far away from the movable block, extends to the outer side of the sleeve, a mounting plate is fixedly arranged on the surface of the movable rod, a spring is arranged on the surface of the mounting plate, and a through hole is formed in the surface of the mounting plate.

Inventors

• WANG YANG
• YANG ZHIHUA
• Wu ruian
• ZHONG NING
• GUO YUNPENG

Assignees

• 中国地质科学院地质力学研究所

Dates

Publication Date

20260508

Application Date

20250526

Claims (7)

1. 1. The utility model provides a measure biax test cushion device that contains hole structure acoustic emission location, including connecting bottom plate (1), and a serial communication port (2), connecting hole (3) have been seted up to the inboard of cushion (2), the inside fixed mounting of connecting hole (3) has sleeve (4), the inside of sleeve (4) is provided with movable block (5), fixed mounting has movable rod (6) on movable block (5), the one end that movable rod (6) kept away from movable block (5) extends to the outside fixed mounting of sleeve (4) has mounting panel (7), the surface of movable rod (6) is provided with spring (8), through-hole (9) have been seted up on the surface of mounting panel (7), the inboard of mounting panel (7) is provided with acoustic emission sensor (10), threaded hole (11) have been seted up to the front end of acoustic emission sensor (10), the lower extreme fixed mounting of cushion (2) has protruding piece (12), draw-in groove (13) have all been seted up to the left and right sides of connecting bottom plate (1) upper end, the inside of wire casing (14) has all been seted up to the left and right sides of connecting bottom plate (1) front end, both sides of wire casing (14) are all installed to the both sides.
2. 2. The dual-shaft test cushion block device for measuring acoustic emission positioning of a structure containing a cavity according to claim 1, wherein the surface of the movable block (5) is in sliding connection with the sleeve (4), and the surface of the movable rod (6) is in sliding connection with the sleeve (4).
3. 3. The double-shaft test cushion block device for measuring acoustic emission positioning of a structure containing a cavity according to claim 2 is characterized in that the surface of a movable rod (6) is sleeved with a spring (8), and the surface of a mounting plate (7) is in sliding connection with a connecting hole (3).
4. 4. The dual-shaft test cushion block device for measuring acoustic emission positioning of a structure containing a cavity according to claim 3, wherein one end of a spring (8) is fixedly connected with a sleeve (4), and the other end of the spring (8) is fixedly connected with a mounting plate (7).
5. 5. The dual-shaft test cushion block device for measuring acoustic emission positioning of a structure containing a cavity, which is characterized in that an acoustic emission sensor (10) is connected with a mounting plate (7) in a clamping manner, and a threaded hole (11) is connected with a through hole (9) through a bolt.
6. 6. The dual-shaft test cushion block device for measuring acoustic emission positioning of a structure containing a cavity according to claim 5, wherein a wire insertion hole is formed in the side of the front end of the acoustic emission sensor (10) located at the threaded hole (11), and the protruding block (12) is connected with the clamping groove (13) in a clamping mode.
7. 7. The double-shaft test cushion block device for measuring acoustic emission positioning of a structure containing a cavity according to claim 1, wherein the beam slots (14) are distributed at equal intervals, and cambered surface guide openings are formed in the front ends of the elastic blocks (15).

Description

Measure and contain experimental cushion device of biax of chamber structure acoustic emission location Technical Field The utility model relates to the field of rock mechanics tests and nondestructive testing, in particular to a biaxial test cushion block device for measuring acoustic emission positioning of a structure containing a cavity. Background In the current rock mechanics experimental research, the acoustic emission technology is used as a nondestructive detection means and is commonly used for research such as rock mass damage evolution, crack propagation, rock burst prediction and the like, however, for a rock sample with a cavity structure, certain difficulties still exist in arranging the acoustic emission sensor under the condition of biaxial loading, and particularly, the close contact between the acoustic emission sensor and the rock sample and the stability of a loading surface are required to be ensured simultaneously. For example, patent number (CN 204086017U) discloses a rock double-shaft unloading test device, which comprises a base, a longitudinal load sensor, a transverse load sensor and a long guide rail, wherein a door type loading frame and a lower cushion block are arranged on the base, a longitudinal loading motor is arranged on the door type loading frame, the lower end of the longitudinal loading motor is connected with the upper cushion block, a sample is arranged between the upper cushion block and the lower cushion block, a transverse loading system is arranged on the long guide rail, the transverse loading system comprises a frame, a servo motor and two baffle plates, the servo motor is arranged on the frame and respectively connected with a screw rod through a speed reducer, the screw rod is connected with a left press block through a nut, one baffle plate is arranged on the frame, the other baffle plate is connected with the frame through a pull rod, and a right press block is arranged on the other baffle plate. At present, most of traditional loading cushion blocks are of a rigid integral structure, and arrangement and stable loading of sensors are difficult to achieve, so that acoustic emission signals are unstable and even lost. Disclosure of utility model In order to solve the problems that the arrangement and stable loading of the sensors are difficult to achieve by the aid of the traditional cushion blocks, the mounting process of the sensors is complex, the positions cannot be quickly adjusted, and experimental efficiency is greatly limited. The double-shaft test cushion block device for measuring acoustic emission positioning of the structure of the cavity comprises a connecting bottom plate, a cushion block, a connecting hole, a sleeve, a movable block, a movable rod, a mounting plate, a spring, a through hole, an acoustic emission sensor, a threaded hole, a protruding block, clamping grooves, a binding groove and elastic blocks, wherein the connecting hole is formed in the inner side of the cushion block, the sleeve is fixedly arranged in the connecting hole, the movable block is fixedly provided with the movable rod, the mounting plate is fixedly arranged on the movable block, the spring is arranged on the surface of the movable rod, the through hole is formed in the surface of the mounting plate, the acoustic emission sensor is arranged in the inner side of the mounting plate, the threaded hole is formed in the front end of the acoustic emission sensor, the protruding block is fixedly arranged at the lower end of the cushion block, the clamping grooves are formed in the left side and the right side of the upper end of the connecting bottom plate, and the elastic blocks are fixedly arranged at the left side and the right side of the inner side of the binding groove. Preferably, the cushion blocks are divided into a left cushion block and a right cushion block, a plurality of connecting holes are formed in each connecting hole, an acoustic emission sensor and a spring structure for propping the acoustic emission sensor against a rock sample are arranged in each connecting hole, two clamping grooves are formed in a connecting bottom plate, protruding blocks matched with the clamping grooves are arranged at the bottoms of the left cushion block and the right cushion block, the connecting bottom plate is of a rectangular structure, two clamping grooves are formed in the connecting bottom plate and used for positioning the cushion blocks at the left side and the right side, the protruding blocks are arranged at the bottoms of the cushion blocks and can be inserted into the clamping grooves of the connecting bottom plate, connecting holes are formed in each cushion block and used for installing the acoustic emission sensor, the acoustic emission sensor is square and can be stably embedded into the connecting holes, the spring structure is used for propping up the acoustic emission sensor tightly against the rock sample, the rock sample is placed between the two cush