CN219142439U - Acoustic emission sensor fixing device for rock mechanical test - Google Patents
Acoustic emission sensor fixing device for rock mechanical test Download PDFInfo
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- CN219142439U CN219142439U CN202222932311.4U CN202222932311U CN219142439U CN 219142439 U CN219142439 U CN 219142439U CN 202222932311 U CN202222932311 U CN 202222932311U CN 219142439 U CN219142439 U CN 219142439U
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- 239000011435 rock Substances 0.000 title claims abstract description 67
- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 238000002474 experimental method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 239000003292 glue Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The utility model relates to an acoustic emission sensor fixing device for rock mechanics tests, and belongs to the technical field of laboratory acoustic emission experiment sensor clamps. The utility model discloses an acoustic emission sensor fixing device which comprises a hollow base, a movable disc and a flexible fixing piece, wherein the bottom end of the hollow base is provided with an opening, an acoustic emission sensor is placed in a central cavity of the hollow base, the movable disc is arranged at the top of the central cavity of the hollow base and is positioned right above the acoustic emission sensor, the flexible fixing piece is fixedly arranged at the bottom end of the hollow base, and the bottom surface of the flexible fixing piece is adhered to the surface of a rock sample to be tested. The utility model can ensure the close contact between the sensor and the rock sample surface in the laboratory acoustic emission test, and can ensure that the sensor is freely distributed at any position on the rock sample surface, and meanwhile, the utility model is not limited by the shape of the rock sample, and has the advantages of simple structure, convenient operation, strong practicability and the like.
Description
Technical Field
The utility model relates to an acoustic emission sensor fixing device for rock mechanics tests, and belongs to the technical field of laboratory acoustic emission experiment sensor clamps.
Background
The acoustic emission detection technology belongs to a novel dynamic nondestructive detection technology, can continuously provide state information of a detected piece, can know the damage position, the type and the change process of the detected piece in real time, and is suitable for on-line monitoring and early-stage damage early warning. Therefore, the damage position, mode and damage process inside the rock can be known through a laboratory rock mechanics acoustic emission test.
In a laboratory rock mechanics acoustic emission experiment, the rock part can be monitored on line in real time only by installing an acoustic emission sensor at a proper position on the surface of a rock sample, and information such as inoculation and formation processes of cracks, positions and types of the cracks can be obtained in time. But the acoustic emission sensor is used as a core component for acoustic emission detection, has no functions of adhesion, adsorption and the like, and a pickup signal end of the acoustic emission sensor needs to be closely attached to the surface of a rock sample. In the rock mechanics test, the acoustic emission sensor is required to be fixed on the surface of the rock sample by a certain auxiliary method, and the close fitting of the pick-up signal end of the acoustic emission sensor and the surface of the rock sample can be ensured.
The existing acoustic emission sensor fixing device mainly comprises a strong magnet adsorption type fixing device and a sticking type fixing device. The strong magnet adsorption type fixing device has good fixing effect on the magnetic steel product detection piece, but is not suitable for rock samples. The sticking type fixing device mostly sticks the picking signal end of the acoustic emission sensor to the fixing device, and then sticks the fixing device to the surface of the rock sample by adopting glue, so that the acoustic emission waveform must penetrate through the rock, the glue and two or more layers of mediums of the fixing device when propagating, and serious attenuation of signals is caused. In addition, the existing adhesive fixing device has the characteristic of weak adaptability, generally speaking, the fixing device with one specification can only adapt to the sensors with the same model (size), is not beneficial to being adhered to the circular arc surface, and does not have the function of positioning and adjusting the sensors after being adhered.
Disclosure of Invention
Aiming at the defects of the existing acoustic emission sensor fixing device, the utility model provides the acoustic emission sensor fixing device for the rock mechanical test, which can enable the pick-up signal end of the acoustic emission sensor to be directly and tightly attached to the surface of a rock sample, can enable the sensor to be freely distributed at any position on the surface of the rock sample, is suitable for fixing the arc surface and the plane of the sample, can be suitable for fixing sensors of different types (sizes), and has the function of adjusting and positioning the installed sensor again.
The utility model adopts the technical proposal for solving the technical problems that:
the utility model provides an acoustic emission sensor fixing device of rock mechanical test, including cavity base 1, remove disc 4, flexible mounting 5, cavity base 1's bottom opening, cavity base 1 does not have the bottom plate promptly, cavity base 1's lateral wall is equipped with the windowing, acoustic emission sensor 8 is placed in cavity base 1's central cavity, acoustic emission sensor 8's pick-up signal end and the surface contact of rock sample that awaits measuring, remove disc 4 setting at cavity base 1 central cavity's top and be located acoustic emission sensor 8 directly over, flexible mounting 5 sets up in cavity base 1's bottom, flexible mounting 5's end is connected with cavity base 1, flexible mounting 5's bottom surface and the surface bonding of rock sample that awaits measuring.
The top plate center of the hollow base 1 is provided with a jacking positioning threaded hole 6, the jacking positioning threaded hole 6 is internally and in threaded connection with a jacking positioning bolt 2, and the bottom end of the jacking positioning bolt 2 is in contact with the top surface of the movable disc 4.
The bottom of the hollow base 1 is provided with a lateral positioning hole 7, a lateral positioning piece 3 is arranged in the lateral positioning hole 7, and the end head of the lateral positioning piece 3 is contacted with the side wall of the acoustic emission sensor 8.
The lateral positioning hole 7 is uniformly formed along the circumferential direction of the bottom of the hollow base 1, the lateral positioning hole 7 comprises a lateral threaded hole I701, a lateral threaded hole II702, a lateral threaded hole III703 and a lateral threaded hole IV704, the lateral positioning piece 3 comprises a lateral positioning bolt I301, a lateral positioning bolt II302, a lateral positioning bolt III303 and a lateral positioning bolt IV304, the lateral positioning bolt I301, the lateral positioning bolt II302, the lateral positioning bolt III303 and the lateral positioning bolt IV304 of the lateral positioning piece 3 are respectively in threaded connection with the lateral threaded hole I701, the lateral threaded hole II702, the lateral threaded hole III703 and the lateral threaded hole IV704 of the lateral positioning hole 7, and the ends of the lateral positioning bolt I301, the lateral positioning bolt II302, the lateral positioning bolt III303 and the lateral positioning bolt IV304 are in contact with the side wall of the acoustic emission sensor 8.
The flexible fixing piece 5 and the lateral locating piece 3 are alternately arranged at the bottom of the hollow base 1, the flexible fixing piece 5 comprises a soft patch paste strip I501, a soft patch paste strip II502, a soft patch paste strip III503 and a soft patch paste strip IV504, the soft patch paste strip I501, the soft patch paste strip II502, the soft patch paste strip III503 and the soft patch paste strip IV504 are uniformly distributed along the circumferential direction of the bottom of the hollow base 1, the included angles between the soft patch paste strip I501, the soft patch paste strip II502, the soft patch paste strip III503 and the soft patch paste strip IV504 and the adjacent lateral locating piece 3 are 45 ℃, the ends of the soft patch paste strip I501, the soft patch paste strip II502, the soft patch paste strip III and the soft patch paste strip IV504 are connected with the hollow base 1, and the bottom surfaces of the soft patch paste strip I501, the soft patch paste strip II502, the soft patch paste strip III and the soft patch paste strip IV504 are adhered with a rock sample to be tested.
The jacking positioning bolt 2 is an M5 bolt, and the jacking positioning threaded hole 6 is an M5 threaded hole which is adaptive to the jacking positioning bolt 2; the M5 bolt is adjusted to push the movable disc to move up and down along the inner wall in the cavity of the base, so that the acoustic emission sensor is tightly pressed on the surface of the rock sample, and meanwhile, the top end of the acoustic emission sensor is protected.
The positioning piece 3 can be an M2 bolt, and the lateral positioning hole 7 is an M2 threaded hole which is matched with the positioning piece 3; by adjusting the length of the M2 bolts, namely the insertion length of the lateral positioning bolt I301, the lateral positioning bolt II302, the lateral positioning bolt III303 and the lateral positioning bolt IV304, the acoustic emission sensor can be precisely positioned, and meanwhile, the lateral fixing of the acoustic emission sensor is formed.
The flexible fixing piece 5 can be freely bent, and is used for tightly adhering the fixing device on the arc surface or plane of the rock sample after glue is applied.
The application method of the acoustic emission sensor fixing device for the rock mechanical test comprises the following specific steps:
1) Bonding the bottom surface of the flexible fixing piece 5 around a to-be-measured point on the surface of the rock sample to be measured, namely, the to-be-measured point is at the right center of the flexible fixing piece 5;
2) After the acoustic emission sensor 8 picks up the signal end and smears the couplant, the window on the side wall of the hollow base 1 is placed in the central cavity of the hollow base 1, so that the acoustic emission sensor 8 picks up the signal end to be in contact with the surface of the rock sample to be measured;
3) The sound emission sensor 8 picks up the signal end and presses the surface of the rock sample by adjusting the descending height of the movable disc 4, and the movable disc 4 can protect the top end of the sound emission sensor 8.
The utility model has the beneficial effects that:
(1) The device can ensure that the pick-up signal end of the acoustic emission sensor is directly and tightly attached to the surface of the rock sample, and is applicable to the arc surface and the plane of the sample;
(2) The device is suitable for acoustic emission sensors of different models (sizes), but not for acoustic emission sensors of a single specific model (size);
(3) The device can fix the acoustic emission sensor at any position on the surface of the rock sample, but not at a fixed position, does not form annular lateral constraint on the rock sample, and does not form annular lateral constraint force on the sample;
(4) The device can still position and adjust the acoustic emission sensor after being stuck and fixed, has simple structure and can be replaced after parts are worn.
Drawings
FIG. 1 is an acoustic emission sensor fixture for rock mechanics testing;
FIG. 2 is a front view of an acoustic emission sensor fixture for rock mechanics testing;
FIG. 3 is a left side view of an acoustic emission sensor fixture for rock mechanics testing;
FIG. 4 is a top view of an acoustic emission sensor fixture for rock mechanics testing;
FIG. 5 is an acoustic emission sensor fixture of a rock mechanics test after loading an acoustic emission sensor;
in the figure: 1-base, 2-top positioning bolt, 3-side positioning piece, 301-side positioning bolt I, 302-side positioning bolt II, 303-side positioning bolt III, 304-side positioning bolt IV, 4-moving disk, 5-flexible fixing piece, 501-soft patch strip I, 502-soft patch strip II, 503-soft patch strip III, 504-soft patch strip IV, 6-top positioning threaded hole, 701-side threaded hole I, 702-side threaded hole II, 703-side threaded hole III, 704-side threaded hole IV, 8-acoustic emission sensor.
Detailed Description
The utility model will be further described with reference to the following specific embodiments.
Example 1: as shown in fig. 1 to 5, an acoustic emission sensor fixing device for rock mechanics test,
the device comprises a hollow base 1, a movable disc 4 and a flexible fixing piece 5, wherein the bottom end of the hollow base 1 is opened, namely the hollow base 1 is free of a bottom plate, a window is formed in the side wall of the hollow base 1, an acoustic emission sensor 8 is placed in a central cavity of the hollow base 1, a pickup signal end of the acoustic emission sensor 8 is in contact with the surface of a rock sample to be tested, the movable disc 4 is arranged at the top of the central cavity of the hollow base 1 and is positioned right above the acoustic emission sensor 8, the flexible fixing piece 5 is arranged at the bottom end of the hollow base 1, the end head of the flexible fixing piece 5 is connected with the hollow base 1, and the bottom surface of the flexible fixing piece 5 is bonded with the surface of the rock sample to be tested;
the application method of the acoustic emission sensor fixing device for the rock mechanical test comprises the following specific steps:
1) Bonding the bottom surface of the flexible fixing piece 5 around a to-be-measured point on the surface of the rock sample to be measured, namely, the to-be-measured point is at the right center of the flexible fixing piece 5;
2) After the acoustic emission sensor 8 picks up the signal end and smears the couplant, the window on the side wall of the hollow base 1 is placed in the central cavity of the hollow base 1, so that the acoustic emission sensor 8 picks up the signal end to be in contact with the surface of the rock sample to be measured;
3) The sound emission sensor 8 picks up the signal end and presses the surface of the rock sample by adjusting the descending height of the movable disc 4, and the movable disc 4 can protect the top end of the sound emission sensor 8.
Example 2: the acoustic emission sensor fixture of the rock mechanics test of this example is substantially identical to the acoustic emission sensor fixture of the rock mechanics test of example 1, except that: a top positioning threaded hole 6 is formed in the center of the top plate of the hollow base 1, a top positioning bolt 2 is arranged in the top positioning threaded hole 6 in a threaded connection manner, and the bottom end of the top positioning bolt 2 is contacted with the top surface of the movable disc 4;
the jacking positioning bolt 2 is an M5 bolt, and the jacking positioning threaded hole 6 is an M5 threaded hole which is adaptive to the jacking positioning bolt 2; the M5 bolt is adjusted to push the movable disc to move up and down along the inner wall in the cavity of the base, so that the acoustic emission sensor is tightly pressed on the surface of the rock sample, and meanwhile, the top end of the acoustic emission sensor is protected.
Example 3: the acoustic emission sensor fixture of the rock mechanics test of this example is substantially identical to the acoustic emission sensor fixture of the rock mechanics test of example 2, except that:
the bottom of the hollow base 1 is provided with a lateral positioning hole 7, a lateral positioning piece 3 is arranged in the lateral positioning hole 7, and the end head of the lateral positioning piece 3 is contacted with the side wall of the acoustic emission sensor 8;
the lateral positioning holes 7 are uniformly formed along the circumferential direction of the bottom of the hollow base 1, the lateral positioning holes 7 comprise lateral threaded holes I701, II702, III703 and IV704, the lateral positioning piece 3 comprises lateral positioning bolts I301, II302, III303 and IV304, and the lateral positioning bolts I301, II302, III303 and IV304 of the lateral positioning piece 3 are in threaded connection with the lateral threaded holes I701, II702, III703 and IV704 of the lateral positioning holes 7 respectively, and the ends of the lateral positioning bolts I301, II302, III303 and IV304 are in contact with the side wall of the acoustic emission sensor 8;
the positioning piece 3 can select an M2 bolt, and the lateral positioning hole 7 is an M2 threaded hole which is matched with the positioning piece 3; by adjusting the length of the M2 bolts, namely the insertion length of the lateral positioning bolt I301, the lateral positioning bolt II302, the lateral positioning bolt III303 and the lateral positioning bolt IV304, the acoustic emission sensor can be precisely positioned, and meanwhile, the lateral fixing of the acoustic emission sensor is formed.
Example 4: the acoustic emission sensor fixture of the rock mechanics test of this example is substantially identical to the acoustic emission sensor fixture of the rock mechanics test of example 3, except that:
the flexible fixing piece 5 and the lateral locating piece 3 are alternately arranged at the bottom of the hollow base 1, the flexible fixing piece 5 comprises a soft patch paste strip I501, a soft patch paste strip II502, a soft patch paste strip III503 and a soft patch paste strip IV504, the soft patch paste strip I501, the soft patch paste strip II502, the soft patch paste strip III503 and the soft patch paste strip IV504 are uniformly distributed along the circumferential direction of the bottom of the hollow base 1, the included angles between the soft patch paste strip I501, the soft patch paste strip II502, the soft patch paste strip III503 and the soft patch paste strip IV504 and the adjacent lateral locating piece 3 are 45 ℃, the ends of the soft patch paste strip I501, the soft patch paste strip II502, the soft patch paste strip III and the soft patch paste strip IV504 are connected with the hollow base 1, and the bottom surfaces of the soft patch paste strip I501, the soft patch paste strip II503 and the soft patch paste strip IV504 are adhered with a rock sample to be tested;
the preparation method of the acoustic emission sensor fixing device for the rock mechanics test comprises the following specific steps:
1) The flexible fixing piece 5, namely the bottom surfaces of the soft patch sticking strip I501, the soft patch sticking strip II502, the soft patch sticking strip III503 and the soft patch sticking strip IV504 are coated with 502 glue or AB glue, and the soft patch sticking strip I, the soft patch sticking strip III and the soft patch sticking strip IV are adhered to the periphery of a point to be detected (the position where the acoustic emission sensor is prearranged) on the surface of a rock sample to be detected, namely the point to be detected is at the right center of the flexible fixing piece 5;
2) After the acoustic emission sensor 8 picks up the signal end and smears the couplant, the window on the side wall of the hollow base 1 is placed in the central cavity of the hollow base 1, so that the acoustic emission sensor 8 picks up the signal end to be in contact with the surface of the rock sample to be measured;
3) The sound emission sensor 8 picks up a signal end to be pressed on the surface of a rock sample by adjusting the downward inserting depth of the top positioning bolt 2 so as to push the moving disc to descend along the inner wall in the cavity of the base, and the moving disc 4 can protect the top end of the sound emission sensor 8, so that the longitudinal fixing and the preliminary positioning of the sound emission sensor 8 are realized;
4) By adjusting the inserted lengths of the positioning piece 3, namely the lateral positioning bolt I301, the lateral positioning bolt II302, the lateral positioning bolt III303 and the lateral positioning bolt IV304, the acoustic emission sensor can be precisely positioned, and meanwhile, the lateral fixing of the acoustic emission sensor is formed.
The specific embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.
Claims (5)
1. An acoustic emission sensor fixing device for rock mechanics test, which is characterized in that: including cavity base (1), remove disc (4), flexible mounting (5), the bottom opening of cavity base (1), the lateral wall of cavity base (1) is equipped with the windowing, acoustic emission sensor (8) are placed in the central cavity of cavity base (1), the surface contact of the pick-up signal end and the rock sample that awaits measuring of acoustic emission sensor (8), remove disc (4) and set up at the top of cavity base (1) central cavity and be located acoustic emission sensor (8) directly over, flexible mounting (5) are fixed to be set up in the bottom of cavity base (1), the bottom surface of flexible mounting (5) bonds with the rock sample surface that awaits measuring.
2. The acoustic emission sensor fixture of claim 1, wherein: the top plate center of the hollow base (1) is provided with a jacking positioning threaded hole (6), the jacking positioning threaded hole (6) is internally connected with a jacking positioning bolt (2) in a threaded manner, and the bottom end of the jacking positioning bolt (2) is in contact with the top surface of the movable disc (4).
3. Acoustic emission sensor fixture for rock mechanics tests according to claim 1 or 2, characterized in that: the bottom of the hollow base (1) is provided with a lateral positioning hole (7), a lateral positioning piece (3) is arranged in the lateral positioning hole (7), and the end head of the lateral positioning piece (3) is contacted with the side wall of the acoustic emission sensor (8).
4. A rock mechanical test acoustic emission sensor fixture according to claim 3, wherein: lateral positioning hole (7) are evenly offered along the bottom circumference of cavity base (1), lateral positioning hole (7) are including lateral screw hole I (701), lateral screw hole II (702), lateral screw hole III (703) and lateral screw hole IV (704), lateral positioning spare (3) are including lateral positioning bolt I (301), lateral positioning bolt II (302), lateral positioning bolt III (303) and lateral positioning bolt IV (304), lateral positioning bolt I (301) of lateral positioning spare (3), lateral positioning bolt II (302), lateral positioning bolt III (303) and lateral positioning bolt IV (304) respectively with lateral screw hole I (701) of lateral positioning hole (7), lateral screw hole II (702), lateral screw hole III (703) and lateral screw hole IV (704) threaded connection, lateral positioning bolt I (301), lateral positioning bolt II (302), lateral positioning bolt III (303) and lateral positioning bolt IV (304) all end with the lateral wall contact of acoustic emission sensor (8).
5. The acoustic emission sensor fixture of claim 4 for rock mechanics testing, wherein: the flexible fixing piece (5) and the lateral locating piece (3) are alternately arranged at the bottom of the hollow base (1), the flexible fixing piece (5) comprises a soft patch paste strip I (501), a soft patch paste strip II (502), a soft patch paste strip III (503) and a soft patch paste strip IV (504), the soft patch paste strip I (501), the soft patch paste strip II (502), the soft patch paste strip III (503) and the soft patch paste strip IV (504) are uniformly distributed along the circumferential direction of the bottom of the hollow base (1), the soft patch paste strip I (501), the soft patch paste strip II (502), the soft patch paste strip III (503) and the soft patch paste strip IV (504) are respectively connected with the hollow base (1) at 45 ℃ with the included angle of the adjacent lateral locating piece (3), the soft patch paste strip I (501), the soft patch paste strip II (502), the end heads of the soft patch paste strip III (503) and the soft patch paste strip IV (504) being connected with the hollow base (1), the soft patch paste strip II (502), the soft patch paste strip III (503) and the soft patch paste strip IV (503) and the soft patch strip IV (504) being adhered with a rock sample to be tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222932311.4U CN219142439U (en) | 2022-11-03 | 2022-11-03 | Acoustic emission sensor fixing device for rock mechanical test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222932311.4U CN219142439U (en) | 2022-11-03 | 2022-11-03 | Acoustic emission sensor fixing device for rock mechanical test |
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| Publication Number | Publication Date |
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| CN219142439U true CN219142439U (en) | 2023-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222932311.4U Active CN219142439U (en) | 2022-11-03 | 2022-11-03 | Acoustic emission sensor fixing device for rock mechanical test |
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| Country | Link |
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| CN (1) | CN219142439U (en) |
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- 2022-11-03 CN CN202222932311.4U patent/CN219142439U/en active Active
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