Auxiliary mounting device and mounting method for acoustic emission monitoring probe of rock sample

Abstract

The invention relates to an auxiliary mounting device and method for a rock sample acoustic emission monitoring probe. The auxiliary mounting device comprises a bottom plate, an auxiliary positioning device and a probe fixing device; a sample bearing area is arranged on the bottom plate; the probe fixing device comprises a fixing sleeve and a probe locking bolt, and the fixing sleeve is in threaded connection with the probe locking bolt; a fitting part is arranged at the front end of the fixing sleeve, and the front end surface of the fitting part is a fitting surface matched with the surface of a sample; the probe fixing device is used for being fixed at a required position on the surface of the rock sample after being positioned by the auxiliary positioning device, so that the attaching part is in close contact with the surface of the rock sample; and the probe fixing device can be dismounted after being fixed on the surface of the rock sample. The probe fixing device is used for installing the probe, the auxiliary positioning device is used for positioning the probe fixing device, the auxiliary positioning device is dismounted after the probe fixing device is firmly pasted on the sample, and positioning is accurate; and adverse effects on test results due to the fact that the device cannot be detached can be avoided.

Description

Technical Field

[0001] The invention relates to geotechnical engineering technology, in particular to an auxiliary installation device and an installation method for a rock sample acoustic emission monitoring probe. Background Art

[0002] Under the disturbance of excavation unloading, engineering rock mass often suffers from fracture disasters such as spalling, landslides and rock bursts, which have posed a serious threat to engineering safety. In-depth revelation of the evolution mechanism of engineering rock mass fracture and the process of disaster incubation is of great significance for disaster warning and prevention. As an important means of studying rock fracture mechanism, acoustic emission monitoring can capture the dynamic information of the generation, expansion and penetration of internal microcracks in the rock during stress in real time, and intuitively display the whole process of internal microcracks in the rock from initiation to rapid development to final destruction, providing valuable real-time data for studying rock fracture mechanism. In addition, using multiple acoustic emission sensors, the fracture source inside the rock can be located to study the starting position and expansion path of rock fracture. Therefore, acoustic emission monitoring is often used in rock indoor uniaxial compression, triaxial compression and direct shear tests to reveal the fracture evolution mechanism and process of rock under different stress states.

[0003] Acoustic emission monitoring equipment mainly consists of three parts: probe, signal amplifier, and analysis system. To ensure the accuracy of collecting acoustic signals, it is necessary to apply an appropriate amount of coupling agent to the surface of the acoustic emission probe and press it against the surface of the rock sample when using the equipment. The probe is generally installed by manual bundling, glue bonding, and adding annular ferrules. However, the above methods have the problems of cumbersome operation, difficult disassembly, affecting the mechanical properties of the rock, and the inability to ensure the contact effect between the probe and the sample.

[0004] In response to this problem, there are existing technologies for designing installation devices for the installation of acoustic emission probes. For example: Chinese Patent 202011208022.9 introduces an acoustic emission probe adsorption device, but it can only be used for specific rock samples, it is difficult to adapt to a variety of samples, and its applicability is not high. The invention patent of Chinese Patent 202210183137.X discloses an acoustic emission probe fixing device, which uses a fixed shell with a built-in acoustic emission probe to achieve a fixing effect, but the fixed shell cannot be removed after installation, which will affect the radial deformation of the rock sample during the test. Chinese Patents 202322053798.3 and 202221277079.9 are respectively an acoustic emission probe installation device for a Brazilian splitting test and a direct shear test, including a closed bracket and a tight top assembly, but these two are not universally applicable, and the device cannot be disassembled and is a closed device, with poor visibility, and cannot meet certain test requirements that require observation of crack propagation. Chinese Patent 201911003888.3 discloses a device for tightly fixing an acoustic emission probe by means of an annular steel, but the annular device cannot be disassembled during the test. The presence of the steel hoop during rock fracturing will affect the expansion of rock cracks and inhibit the falling of rock blocks, thereby affecting the test results. Chinese Patent 202311219799.9 provides a mechanical test acoustic emission probe fixing and protection device, which can freely adjust the position of the slider and ensure the close fit between the probe and the sample through the airbag, but the device cannot be disassembled during the test, and fragments will pop out during the rock destruction process, which may affect the airtightness of the airbag. Chinese Patent 202210472617.8 uses a strap and a probe fixing mechanism to install the acoustic emission probe, but the fixing strap is elastic, and it is difficult to ensure the consistency of the fixing position of the acoustic emission probe for different samples. At the same time, during the test, the length of the strap will change due to the rupture of the sample, thereby changing the position of the acoustic emission probe, and the acoustic emission detection effect cannot be guaranteed. Chinese patents 202011104285.5 and 202010571449.9 both provide a fixing device for an acoustic emission probe, but they are only for cylindrical samples, and the device cannot be disassembled, which will impose certain restrictions on the sample during the compression test and affect the experimental results. Chinese patent 202211304065.6 discloses a fixing device and experimental method for an acoustic emission probe for rock mechanics experiments, but the entire device cannot be disassembled after the acoustic emission probe is installed, and only simple uniaxial tests can be performed. Moreover, for the above-mentioned non-detachable probe installation device, when conducting rock triaxial tests, there are problems such as the device being too cumbersome and the sealing effect cannot be guaranteed.

[0005] In view of the above, most of the current devices generally have defects such as low applicability and the inability to disassemble the devices, which affects the test results. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides an auxiliary installation device and an installation method for a rock sample acoustic emission monitoring probe. The probe is installed by a probe fixing device, and the probe fixing device is positioned by an auxiliary positioning device. After the probe fixing device is firmly pasted on the sample, the auxiliary positioning device is removed. The positioning is accurate and the operation is simple. It can also avoid the adverse effect on the test results caused by the inability to disassemble the device.

[0007] The technical solution adopted by the present invention to solve its technical problems is: an auxiliary installation device for a rock sample acoustic emission monitoring probe, comprising a base plate, an auxiliary positioning device installed on the base plate, and a probe fixing device installed on the positioning end of the auxiliary positioning device; a sample bearing area is arranged on the base plate for bearing the rock sample; the probe fixing device comprises a fixing sleeve and a probe locking bolt, a channel is arranged in the fixing sleeve, and an internal thread is arranged in the rear area of ​​the channel for threaded connection with the probe locking bolt; a fitting portion is arranged at the front end of the fixing sleeve, and the front end surface of the fitting portion is arranged as a fitting surface matching the sample surface; the probe fixing device is used to be fixed to a desired position on the surface of the rock sample after the auxiliary positioning device is positioned, so that the fitting portion is in close contact with the surface of the rock sample; the auxiliary positioning device is also used to be removed after the probe fixing device is fixed on the surface of the rock sample; the probe fixing device is also used to accommodate the probe through the channel, and use the probe locking bolt to adjust the detection end of the probe to fit closely with the surface of the rock sample.

[0008] Furthermore, a notch is provided on the side of the fixing sleeve, so as to avoid the lead wire of the probe when the probe is put into the channel from behind.

[0009] Furthermore, the auxiliary positioning device includes a positioning adjustment mechanism and a positioning seat installed on the adjustment end of the positioning adjustment mechanism; the positioning seat includes a U-shaped limit support; the U-shaped limit support matches the outer diameter of the fixing sleeve, and is used to achieve positioning in the up and down directions and left and right directions when the fixing sleeve is placed in the U-shaped limit support; the outer diameter of the fitting portion is larger than the outer diameter of the fixing sleeve, and the rear end of the fitting portion cooperates with the front end of the positioning seat body, and is used to achieve positioning in the front and back directions when the fixing sleeve is placed in the U-shaped limit support.

[0010] Furthermore, the positioning and adjustment mechanism includes a positioning column assembly, a slidable connecting rod assembly, and a positioning plate assembly; the positioning column assembly is installed on the base plate; the positioning column assembly includes a vertical positioning column, on which a vertical first scale is provided; the slidable connecting rod assembly includes a rod assembly and a connecting assembly; the rod assembly includes a horizontal connecting rod, on which a transverse second scale is provided; the positioning plate assembly includes a positioning plate, on which a third scale along the length direction is provided; the rod assembly is vertically slidably installed on the positioning column; the connecting assembly is transversely slidably installed on the connecting rod; the positioning plate is installed at the front end of the connecting assembly; and the positioning seat is installed on the positioning plate.

[0011] Furthermore, a T-shaped slot is provided on the base plate; the positioning column assembly also includes a positioning column slider provided at the bottom end of the positioning column and cooperating with the T-shaped slot; the positioning column is provided with an external thread near the bottom end and is bolted with a positioning column locking bolt.

[0012] Furthermore, the rod assembly also includes a vertical limit slider sleeved on the positioning column; the connecting rod is fixedly connected to the vertical limit slider; and a vertical locking bolt is also provided on the vertical limit slider.

[0013] Furthermore, the connecting assembly includes a transverse limiting slider sleeved on the connecting rod, and a transverse locking bolt is also provided on the transverse limiting slider.

[0014] Furthermore, the connecting assembly also includes a connecting box fixed on the transverse limiting slider; a square plug is fixed to the rear side of the positioning plate; a square limiting hole is provided at the front end of the connecting box; the square plug is inserted in the square limiting hole; the rear end of the connecting box is also threaded with a fine-tuning bolt; the front end of the fine-tuning bolt extends into the limiting hole and acts on the square plug to fine-tune the position of the positioning plate forward; a plug locking bolt is also provided on the side of the connecting box.

[0015] Furthermore, a mounting seat is also provided on the bottom side of the U-shaped limit support, and the mounting seat has a mounting groove; the mounting groove cooperates with the positioning plate to enable the mounting seat to have the freedom to move along the length direction of the positioning plate; a positioning seat locking bolt is also provided on the side of the mounting seat; a positioning mark is also provided on the rear side of the mounting seat, and the positioning mark cooperates with the third scale.

[0016] The auxiliary installation method of the rock sample acoustic emission monitoring probe is carried out in the following steps:

[0017] S1. Place the rock sample on the sample bearing area of ​​the bottom plate;

[0018] S2. Install the required number of positioning column assemblies, slidable connecting rod assemblies, positioning plate assemblies, and positioning seats according to the shape of the sample and monitoring requirements;

[0019] S3, placing the probe fixture on the corresponding positioning seat, adjusting the positioning column assembly, the slidable connecting rod assembly, the positioning plate assembly and the positioning seat, so that the multiple probe fixtures correspond to the positions to be monitored on the sample surface one by one, and locking the positioning column assembly, the slidable connecting rod assembly, the positioning plate assembly and the positioning seat;

[0020] S4. Remove the probe fixture, apply glue on the fitting surface, put it into the positioning seat, and fine-tune the positioning plate assembly to make the fitting surface of the probe fixture fit tightly with the sample surface;

[0021] S5. After all the probe fixtures are fixed to the sample surface, unlock the positioning column assembly and the bottom plate, move the positioning assembly, and disengage the positioning seat from the probe fixture;

[0022] S6. Take out the sample, install the probe into the probe fixture, and tighten the probe with the probe locking bolt so that the detection end of the probe fits tightly with the surface of the rock sample, thus completing the installation of the probe on the surface of the rock sample.

[0023] The advantages of the present invention are as follows: the auxiliary installation device and installation method of the rock sample acoustic emission monitoring probe of the present invention adopts a probe fixing device to install the probe, adopts an auxiliary positioning device to position the probe fixing device, and removes the auxiliary positioning device after the probe fixing device is firmly pasted on the sample. The positioning is accurate and the operation is simple, and the adverse effect on the test result caused by the inability to disassemble the device can be avoided. The positioning column assembly is installed on the bottom plate by means of a slider and a slide rail, and the surface probe can be accurately installed on samples of various sizes and shapes. After one positioning, the probe positioning of multiple samples can be completed by simply replacing the sample, avoiding excessive repetitive operations, saving time, and improving the efficiency of probe positioning and installation. It can ensure that the probe of each sample is positioned and installed in the same position, reducing the error caused by manual positioning and installation, and improving the accuracy of subsequent acoustic emission monitoring data. The contact area between the adopted probe fixing device and the sample surface is smaller than that of fixing devices such as tapes and iron hoops, ensuring the visualization of the sample surface and avoiding affecting the collection of crack propagation images on the sample surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the rock sample acoustic emission monitoring probe auxiliary installation device used for a square sample in the embodiment;

[0025] Figure 2 A schematic diagram of a bottom plate of a rock sample acoustic emission monitoring probe auxiliary installation device according to an embodiment;

[0026] Figure 3It is a schematic diagram of assembling the auxiliary positioning device and the probe fixing device of the auxiliary installation device of the rock sample acoustic emission monitoring probe of the embodiment;

[0027] Figure 4 A schematic diagram of a positioning column assembly of an auxiliary installation device for a rock sample acoustic emission monitoring probe according to an embodiment;

[0028] Figure 5 A schematic diagram of a rod assembly of an auxiliary installation device for a rock sample acoustic emission monitoring probe according to an embodiment;

[0029] Figure 6 A schematic diagram of a connection assembly of an auxiliary installation device for a rock sample acoustic emission monitoring probe according to an embodiment;

[0030] Figure 7 A schematic diagram of a positioning plate assembly of an auxiliary installation device for a rock sample acoustic emission monitoring probe according to an embodiment;

[0031] Figure 8 A schematic diagram of a positioning seat of the auxiliary installation device for the rock sample acoustic emission monitoring probe according to the embodiment;

[0032] Fig. 9 A schematic diagram of a probe fixing device of the rock sample acoustic emission monitoring probe auxiliary installation device of an embodiment;

[0033] Fig.10 A schematic diagram of a probe mounted on a probe fixing device of an auxiliary installation device for an acoustic emission monitoring probe for a rock sample according to an embodiment;

[0034] Fig.11 is a schematic diagram of a state of a square specimen of the embodiment after the auxiliary installation device is removed;

[0035] Fig.12 It is a schematic diagram of the auxiliary installation device of the rock sample acoustic emission monitoring probe used for a cylindrical sample in the embodiment;

[0036] Among them, 1-bottom plate, 2-auxiliary positioning device, 3-probe fixing device, 4-probe, 5-rock sample, 11-T-shaped slide groove, 12-square sample bearing area, 13-cylindrical sample bearing area, 21-positioning column assembly, 22-slidable connecting rod assembly, 23-positioning plate assembly, 24-positioning seat, 211-positioning column, 212-first scale, 213-positioning column slider, 214-positioning column locking bolt, 221-rod assembly, 222-connecting assembly, 2211-vertical limit slider, 2212-connecting rod, 2213-second scale, 2214-vertical locking bolt, 2215-vertical Horizontal slide groove, 2221-lateral limit slider, 2222-lateral slide groove, 2223-lateral locking bolt, 2224-connecting box, 2225-square limit hole, 2226-fine-tuning bolt, 2227-pillar locking bolt, 231-positioning plate, 232-third scale, 233-slide groove, 234-square pillar, 241-U-shaped limit supporting member, 242-mounting seat, 243-mounting groove, 244-positioning seat locking bolt, 245-positioning mark, 31-fixing sleeve, 32-probe locking bolt, 311-channel, 312-fitting part, 313-fitting surface, 314-notch. DETAILED DESCRIPTION

[0037] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

[0038] Example

[0039] Please refer to Figures 1 to 12 As shown, this embodiment provides an auxiliary installation device for rock sample acoustic emission monitoring probe, including a base plate 1, an auxiliary positioning device 2 installed on the base plate 1, and a probe fixing device 3 installed at the positioning end of the auxiliary positioning device 2; the base plate 1 is provided with a sample bearing area for bearing a rock sample 5; the probe fixing device 3 includes a fixing sleeve 31 and a probe locking bolt 32, the fixing sleeve 31 is provided with a channel 311, and the channel 311 is provided with an internal thread in the rear area for threaded connection with the probe locking bolt 32; the front end of the fixing sleeve 31 is provided with a contact The fitting portion 312 has a front end surface set as a fitting surface 313 matching the sample surface; the probe fixing device 3 is used to be fixed to the required position on the surface of the rock sample 5 after the auxiliary positioning device 2 is positioned, so that the fitting portion 312 is in close contact with the surface of the rock sample 5; the auxiliary positioning device 2 is also used to be removed after the probe fixing device 3 is fixed on the surface of the rock sample 5; the probe fixing device 3 is also used to accommodate the probe 4 through the channel 311, and use the probe locking bolt 32 to adjust the detection end of the probe 4 to fit closely with the surface of the rock sample 5.

[0040] In this embodiment, the fixing sleeve 31 can be 3D printed, and fixing sleeves with different inner diameters and bottom shapes can be printed according to the size of the probe and the surface morphology of the sample to ensure the matching of the fitting surface and the surface of the sample; 3D printing can also achieve a small volume, high strength and light weight of the fixing sleeve; ensure a firm combination of the fixing sleeve and the sample under small area bonding, thereby ensuring the stability of the probe.

[0041] In this embodiment, the sample carrying area can be set according to actual conditions, and can be realized by means of reference lines. The design of the sample carrying area can achieve better repeatability when performing probe installation operations on multiple samples of the same specification, and the consistency of sample probe installation can be ensured by cooperating with the auxiliary positioning device; specifically, Figure 2 As shown, the sample bearing area includes a square sample bearing area 12 and a cylindrical sample bearing area 13, wherein the state of the square sample bearing area 12 bearing the square sample can be referred to Figure 1 As shown, the state of the cylindrical specimen bearing area 13 bearing the cylindrical specimen can be referred to Fig.12 shown.

[0042] Refer to Figures 9 to 11 As shown, a notch 314 is further provided on the side of the fixing sleeve 31 for avoiding the lead wire of the probe 4 when the probe 4 is placed into the channel 311 from behind.

[0043] Refer to Figure 3 and Figure 8 As shown, the auxiliary positioning device 2 includes a positioning adjustment mechanism and a positioning seat 24 installed at the adjustment end of the positioning adjustment mechanism; the positioning seat 24 includes a U-shaped limiting support 241; the U-shaped limiting support 241 matches the outer diameter of the fixing sleeve 31, and is used to achieve positioning in the up-down direction and the left-right direction when the fixing sleeve 31 is placed in the U-shaped limiting support 241; the outer diameter of the fitting portion 312 is larger than the outer diameter of the fixing sleeve 31, and the rear end of the fitting portion 312 cooperates with the front end of the positioning seat body 241, and is used to achieve positioning in the front-back direction when the fixing sleeve 31 is placed in the U-shaped limiting support 241. In this embodiment, the U-shaped limiting support 241 is used to limit and support the probe fixing device 3, and can also be quickly separated from the probe fixing device 3 when the auxiliary positioning device 2 is removed.

[0044] Refer to Figures 3 to 5As shown, the positioning and adjustment mechanism includes a positioning column assembly 21, a slidable connecting rod assembly 22, and a positioning plate assembly 23; the positioning column assembly 21 is installed on the base plate 1; the positioning column assembly 21 includes a vertical positioning column 211, and a vertical first scale 212 is provided on the positioning column 211; the slidable connecting rod assembly 22 includes a rod assembly 221 and a connecting assembly 222; the rod assembly 221 includes a horizontal connecting rod 2212, and a horizontal second scale 2213 is provided on the connecting rod 2212; the positioning plate assembly 23 includes a positioning plate 231, and a third scale 232 along the length direction is provided on the positioning plate 231; the rod assembly 221 is vertically slidably installed on the positioning column 211; the connecting assembly 222 is horizontally slidably installed on the connecting rod 2212; the positioning plate 231 is installed at the front end of the connecting assembly 222; the positioning seat 24 is installed on the positioning plate 231.

[0045] Refer to Figure 2 and Figure 4 As shown, the bottom plate 1 is also provided with a T-shaped slot 11; the positioning column assembly 21 also includes a positioning column slider 213 provided at the bottom end of the positioning column 211 and matched with the T-shaped slot 11; the positioning column 211 is provided with an external thread near the bottom end, and is bolted with a positioning column locking bolt 214. In this embodiment, during operation, the positioning column assembly 21 is moved along the T-shaped slot 11 to a desired position, and then the positioning column assembly 21 is locked with the bottom plate 1 by the positioning column locking bolt 214.

[0046] Refer to Figure 3 , Figure 5 As shown, the rod assembly 221 also includes a vertical limit slider 2211 sleeved on the positioning column 211; the connecting rod 2212 is fixedly connected to the vertical limit slider 2211; and the vertical limit slider 2211 is also provided with a vertical locking bolt 2214. In this embodiment, the positioning column 211 is a cylinder, and the vertical limit slider 2211 is provided with a circular vertical slide groove 2215. The vertical limit slider 2211 cooperates with the positioning column 211 through the vertical slide groove 2215. During operation, the vertical limit slider 2211 is moved vertically along the positioning column 211 to a desired position, and then the vertical limit slider 2211 is locked with the positioning column 211 through the vertical locking bolt 2214.

[0047] Refer to Figure 3 , Figure 6As shown, the connecting assembly 222 includes a transverse limiting slider 2221 sleeved on the connecting rod 2212, and a transverse locking bolt 2223 is also provided on the transverse limiting slider 2221. In this embodiment, the connecting rod 2212 is square, and the transverse limiting slider 2221 is provided with a square transverse sliding groove 2222. The transverse limiting slider 2221 cooperates with the connecting rod 2212 through the transverse sliding groove. During operation, the transverse limiting slider 2221 is moved transversely along the connecting rod 2212 to a desired position, and then the transverse limiting slider 2221 is locked with the connecting rod 2212 through the transverse locking bolt 2223.

[0048] Refer to Figure 3 , Figure 6 and Figure 7 As shown, the connecting component 222 also includes a connecting box 2224 fixed on the transverse limiting slider 2221; a square plug 234 is fixed to the rear side of the positioning plate 231; a square limiting hole 2225 is provided at the front end of the connecting box 2224; the square plug 234 is inserted into the square limiting hole 2225; the rear end of the connecting box 2224 is also threadedly connected with a fine-tuning bolt 2226; the front end of the fine-tuning bolt 2226 extends into the limiting hole 2225 and acts on the square plug 234, for fine-tuning the position of the positioning plate 231 forward; a plug locking bolt 2227 is also provided on the side of the connecting box 2224. In this embodiment, during operation, the positioning plate is moved forward (in the direction of the sample). After the fitting surface 313 of the probe fixture 3 installed on the positioning plate 231 contacts the sample surface, the position of the positioning plate 231 is fine-tuned forward by adjusting the fine-tuning bolt 2226, so that the fitting surface of the probe fixture 3 is in close contact, and then the positioning plate 231 is locked with the connecting box 2224 by the plug locking bolt 2227.

[0049] Refer to Figure 3 and Figure 8As shown, a mounting seat 242 is also provided on the bottom side of the U-shaped limit support 241, and the mounting seat 242 has a mounting groove 243; the mounting groove 243 cooperates with the positioning plate 231 to enable the mounting seat 242 to have the freedom to move along the length direction of the positioning plate 231; a positioning seat locking bolt 244 is also provided on the side of the mounting seat 242; a positioning mark 245 is also provided on the rear side of the mounting seat 242, and the positioning mark 245 cooperates with the third scale 232. In this embodiment, the mounting groove 243 penetrates the mounting seat 242 in the left-right direction, and the bottom side of the mounting groove 243 is open, and the mounting groove 243 cooperates with the top edge of the positioning plate so that the mounting seat can move along the top edge of the positioning plate; when the positioning seat moves to the set position, the positioning mark 245 corresponds to the corresponding position of the third scale 232, and the positioning seat 24 and the positioning plate 231 are locked by the positioning seat locking bolt 244; the positioning plate 231 is provided with a slide rail groove 233 along the length direction of the positioning plate 231 at a position corresponding to the positioning seat locking bolt 244; when the positioning seat 24 is placed on the positioning plate 231, the positioning seat locking bolt 244 can be slightly screwed into the slide rail groove 233, but not locked, so that the positioning seat 24 only has the freedom to move along the length direction of the positioning plate 231, thereby realizing the temporary installation of the positioning seat.

[0050] This embodiment also provides a method for auxiliary installation of a rock sample acoustic emission monitoring probe, which is specifically performed in the following steps:

[0051] S1. Place the rock sample on the sample bearing area of ​​the bottom plate; the specific position can refer to the reference line on the bottom plate, or it can be freely placed on the premise of facilitating subsequent operations;

[0052] S2. According to the shape of the sample and the monitoring requirements, the required number of positioning column assemblies, slidable connecting rod assemblies, positioning plate assemblies, and positioning seats are installed; in this embodiment, the required number of positioning columns are first installed on the base plate according to the requirements of subsequent tests. Specifically, the positioning block slider cooperates with the T-shaped slide groove to position the sample at the required position according to the shape of the sample, and the positioning column assembly is locked with the base plate by the positioning column locking bolt; then the required number of positioning seats are placed on the positioning plate, and the positioning seat locking bolts are used for simple fixing. One or more positioning seats and the installed positioning plate are assembled into a first assembly; according to the test requirements, the required number of first assemblies are assembled, and then the first assembly is assembled. The square plug-in column is used to insert the parts into the square limit hole of the connection box of the connection component, and the plug-in column locking bolt is used for simple fixation. The connecting rod of the rod assembly is inserted into the horizontal slide groove of the horizontal limit slider of the corresponding connection component, and the horizontal locking bolt is used for simple fixation; the required number of first assembly parts are respectively assembled with the corresponding connection components and the slidable connecting rod assembly into the required number of second assembly parts; then the second assembly parts are sleeved on the corresponding positioning columns using the vertical slide grooves, and the vertical locking bolts are used for simple fixation. According to the test requirements, the required number of second assembly parts are installed on the corresponding positioning columns; the above-mentioned "simple fixation" only needs to ensure that they do not fall off during the installation process;

[0053] S3, placing the probe fixture on the corresponding positioning seat, adjusting the positioning column assembly, the slidable connecting rod assembly, the positioning plate assembly and the positioning seat, so that the multiple probe fixtures correspond to the positions to be monitored on the sample surface one by one, and locking the positioning column assembly, the slidable connecting rod assembly, the positioning plate assembly and the positioning seat;

[0054] S4. Remove the probe fixture, apply glue on the fitting surface, put it into the positioning seat, and fine-tune the positioning plate assembly to make the fitting surface of the probe fixture fit tightly with the sample surface;

[0055] S5. After all the probe fixtures are fixed to the sample surface, unlock the positioning column assembly and the bottom plate, move the positioning assembly, and disengage the positioning seat from the probe fixture;

[0056] S6. Take out the sample, install the probe into the probe fixture, and tighten the probe with the probe locking bolt so that the detection end of the probe fits tightly with the surface of the rock sample, thus completing the installation of the probe on the surface of the rock sample.

[0057] In this embodiment, a new sample can be replaced according to the test needs, and the auxiliary positioning device assembled last time can be moved back to its original position using the positioning column assembly. The same probe installation can be performed on the new sample to ensure consistent repeatability of multiple samples. Of course, the position of the probe can also be positioned and adjusted again according to actual needs.

[0058] The above embodiments should not limit the present invention in any way, and any technical solutions obtained by equivalent replacement or equivalent conversion shall fall within the protection scope of the present invention.

Claims

1. Auxiliary installation device for acoustic emission monitoring probe of rock sample, characterized by: The invention comprises a base plate (1), an auxiliary positioning device (2) installed on the base plate (1), and a probe fixing device (3) installed on the positioning end of the auxiliary positioning device (2); the base plate (1) is provided with a sample bearing area for bearing a rock sample (5); the probe fixing device (3) comprises a fixing sleeve (31) and a probe locking bolt (32); a channel (311) is provided in the fixing sleeve (31); an internal thread is provided in the rear area of ​​the channel (311) for threaded connection with the probe locking bolt (32); a fitting portion (312) is provided at the front end of the fixing sleeve (31); the fitting portion (312) The front end surface of the probe (313) is arranged to be a fitting surface (313) matching the sample surface; the probe fixing device (3) is used to be fixed to a desired position on the surface of the rock sample (5) after being positioned by the auxiliary positioning device (2), so that the fitting portion (312) is in close contact with the surface of the rock sample (5); the auxiliary positioning device (2) is also used to be removed after the probe fixing device (3) is fixed on the surface of the rock sample (5); the probe fixing device (3) is also used to accommodate the probe (4) through the channel (311), and to adjust the detection end of the probe (4) to be in close contact with the surface of the rock sample (5) by using the probe locking bolt (32).

2. The rock sample acoustic emission monitoring probe auxiliary installation device according to claim 1 is characterized in that: The side surface of the fixing sleeve (31) is also provided with a notch (314) for avoiding the lead wire of the probe (4) when the probe (4) is placed into the channel (311) from behind.

3. The rock sample acoustic emission monitoring probe auxiliary installation device according to claim 1 or 2, characterized in that: The auxiliary positioning device (2) comprises a positioning adjustment mechanism and a positioning seat (24) installed at the adjustment end of the positioning adjustment mechanism; the positioning seat (24) comprises a U-shaped limit support (241); the U-shaped limit support (241) matches the outer diameter of the fixing sleeve (31) and is used to achieve positioning in the up-down direction and the left-right direction when the fixing sleeve (31) is placed in the U-shaped limit support (241); the outer diameter of the fitting portion (312) is greater than the outer diameter of the fixing sleeve (31), and the rear end of the fitting portion (312) cooperates with the front end of the positioning seat body (241) and is used to achieve positioning in the front-back direction when the fixing sleeve (31) is placed in the U-shaped limit support (241).

4. The rock sample acoustic emission monitoring probe auxiliary installation device according to claim 3 is characterized by: The positioning adjustment mechanism comprises a positioning column assembly (21), a slidable connecting rod assembly (22), and a positioning plate assembly (23); the positioning column assembly (21) is installed on the base plate (1); the positioning column assembly (21) comprises a vertical positioning column (211), and a vertical first scale (212) is provided on the positioning column (211); the slidable connecting rod assembly (22) comprises a rod assembly (221) and a connecting assembly (222); the rod assembly (221) comprises a horizontal connecting rod (2212), and the connecting rod (2212) is provided on the base plate (1); the positioning column assembly (211) comprises a vertical positioning column (211), and a vertical first scale (212) is provided on the positioning column (211); the slidable connecting rod assembly (2 ... comprises a vertical first scale (212) and a vertical first scale (212) 212) is provided with a second horizontal ruler (2213); the positioning plate assembly (23) includes a positioning plate (231), and the positioning plate (231) is provided with a third ruler (232) along the length direction; the rod assembly (221) is vertically slidably installed on the positioning column (211); the connecting assembly (222) is laterally slidably installed on the connecting rod (2212); the positioning plate (231) is installed at the front end of the connecting assembly (222); the positioning seat (24) is installed on the positioning plate (231).

5. The rock sample acoustic emission monitoring probe auxiliary installation device according to claim 4 is characterized in that: The base plate (1) is also provided with a T-shaped slide groove (11); the positioning column assembly (21) further comprises a positioning column slider (213) arranged at the bottom end of the positioning column (211) and cooperating with the T-shaped slide groove (11); the positioning column (211) is provided with an external thread near the bottom end and is bolted with a positioning column locking bolt (214).

6. The rock sample acoustic emission monitoring probe auxiliary installation device according to claim 4 is characterized in that: The rod assembly (221) further comprises a vertical limit slider (2211) sleeved on the positioning column (211); the connecting rod (2212) is fixedly connected to the vertical limit slider (2211); and a vertical locking bolt (2214) is also provided on the vertical limit slider (2211).

7. The rock sample acoustic emission monitoring probe auxiliary installation device according to claim 4 is characterized in that: The connecting assembly (222) comprises a transverse limiting slider (2221) sleeved on the connecting rod (2212), and a transverse locking bolt (2223) is also arranged on the transverse limiting slider (2221).

8. The rock sample acoustic emission monitoring probe auxiliary installation device according to claim 7 is characterized by: The connection assembly (222) also includes a connection box (2224) fixed on the transverse limiting slider (2221); a square plug post (234) is fixed on the rear side of the positioning plate (231); a square limiting hole (2225) is provided at the front end of the connection box (2224); the square plug post (234) is inserted into the square limiting hole (2225); a fine-tuning bolt (2226) is also threadedly connected to the rear end of the connection box (2224); the front end of the fine-tuning bolt (2226) extends into the limiting hole (2225) and acts on the square plug post (234) to fine-tune the position of the positioning plate (231) forward; a plug post locking bolt (2227) is also provided on the side of the connection box (2224).

9. The rock sample acoustic emission monitoring probe auxiliary installation device according to claim 4 is characterized by: A mounting seat (242) is also provided on the bottom side of the U-shaped limiting support member (241), and the mounting seat (242) has a mounting groove (243); the mounting groove (243) cooperates with the positioning plate (231) to enable the mounting seat (242) to have the freedom to move along the length direction of the positioning plate (231); a positioning seat locking bolt (244) is also provided on the side of the mounting seat (242); a positioning mark (245) is also provided on the rear side of the mounting seat (242), and the positioning mark (245) cooperates with the third scale (232).

10. A method for installing the rock sample acoustic emission monitoring probe auxiliary installation device according to any one of claims 4 to 8, characterized in that: Follow these steps: S1. Place the rock sample on the sample bearing area of ​​the bottom plate; S2. Install the required number of positioning column assemblies, slidable connecting rod assemblies, positioning plate assemblies, and positioning seats according to the shape of the sample and monitoring requirements; S3, placing the probe fixture on the corresponding positioning seat, adjusting the positioning column assembly, the slidable connecting rod assembly, the positioning plate assembly and the positioning seat, so that the multiple probe fixtures correspond to the positions to be monitored on the sample surface one by one, and locking the positioning column assembly, the slidable connecting rod assembly, the positioning plate assembly and the positioning seat; S4. Remove the probe fixture, apply glue on the fitting surface, put it into the positioning seat, and fine-tune the positioning plate assembly to make the fitting surface of the probe fixture fit tightly with the sample surface; S5. After all the probe fixtures are fixed to the sample surface, unlock the positioning column assembly and the bottom plate, move the positioning assembly, and disengage the positioning seat from the probe fixture; S6. Take out the sample, install the probe into the probe fixture, and tighten the probe with the probe locking bolt so that the detection end of the probe fits tightly with the surface of the rock sample, thus completing the installation of the probe on the surface of the rock sample.

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