A rock sample acoustic emission testing patch device

Abstract

This invention provides a rock sample acoustic emission testing patch device, relating to the field of rock sample acoustic emission testing technology. It includes a bottom metal plate and side metal plates, with the side metal plates foldably mounted on both sides of the bottom metal plate. L-shaped corner clips are fixedly installed at the four corners of the upper surface of the bottom metal plate, and four limiting arc-shaped clip groups are fixedly installed on the upper surface of each side metal plate. Several speckle holes are formed on the side metal plates. This invention uses L-shaped corner clips to secure the sample, and pre-moving annular iron pads mounted on the side metal plates ensure symmetrical alignment between the annular iron pads attached to the sample. The side metal plates maintain continuous pressure and adhesion between the annular iron pads and the sample, resulting in a stronger bond and easier assembly and disassembly. This improves patching efficiency and allows for better acquisition of acoustic emission signals from within the rock during the test, thereby increasing the success rate of the test.

Description

Technical Field

[0001] This utility model relates to the field of acoustic emission testing technology for rock samples, and in particular to a testing patch device for acoustic emission testing of rock samples. Background Technology

[0002] The shear resistance of a specimen is one of the fundamental mechanical properties. The shear strength, toughness, and crack propagation of the material are all key research areas and have high research value.

[0003] By directly shearing the specimen, the variation law of peak strength and residual strength under different normal stresses is explored. In the simulation of deep shear failure test of slope, the main difficulty lies in the installation of acoustic emission test patch on rock specimen. The common method is to glue steel shims to both sides of the rock specimen, and then spray paint after the glue dries. After the paint dries, speckle patch is applied. Finally, the specimen can be completely dried before the test. During the direct shearing of the specimen, Vaseline is applied to the steel plate, and then the acoustic emission probe is attracted to the steel plate with a magnet to obtain the internal acoustic emission data of the rock specimen during the shearing process.

[0004] As research progresses, the technical requirements for acoustic emission testing patches on rock samples are becoming increasingly stringent. This simple patching technique often results in the steel sheet being misaligned or poorly bonded to the specimen, leading to the steel sheet falling off during the rock sample shearing process. This process is cumbersome and laborious, affecting the experimental progress and results.

[0005] Therefore, it is essential to provide a rock sample acoustic emission testing patch device to address the shortcomings of existing technologies. Utility Model Content

[0006] This invention provides a device for testing acoustic emission of rock samples by attaching a patch, which solves the problem that existing simple patching techniques often result in the steel patch being misaligned or having poor adhesion between the steel patch and the specimen, leading to the steel patch falling off during the rock sample shearing process.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A rock sample acoustic emission testing patch device includes a bottom metal plate and two side metal plates. The side metal plates are foldably installed on both sides of the bottom metal plate. L-shaped corner clips are fixedly installed at the four corners of the upper surface of the bottom metal plate. Four limiting arc-shaped clip groups are fixedly installed on the upper surface of each side metal plate. Several speckle holes are opened on the side metal plates.

[0008] Furthermore, each of the arc-shaped locking blocks is internally fitted with an annular iron washer, and the upper surface of the annular iron washer is provided with an adhesive layer.

[0009] Furthermore, the limiting arc-shaped locking block group includes three arc-shaped limiting blocks, which are arranged in a circular array around the center point of the annular iron pad, and the arc-shaped limiting blocks are movably fitted with the side wall of the annular iron pad.

[0010] Furthermore, the four annular iron pads on each of the side metal sheets form two iron pad groups, and the speckle holes are arranged in rows between the two iron pad groups.

[0011] Furthermore, the minimum distance between the edge of the speckle hole and the edge of the side metal sheet is 2mm, and the diameter of the speckle hole is 2mm.

[0012] Furthermore, the bottom metal sheet and the side metal sheet both have a side length of 100mm, and the annular iron pads are distributed in a rectangular array with the geometric center point of the side metal sheet as the center, and the distance between the center points of two adjacent annular iron pads is 60mm.

[0013] Furthermore, the height of the L-shaped corner card is 5mm.

[0014] The beneficial effects of this utility model are as follows: This invention uses L-shaped corner clips to secure the sample, and pre-installs annular iron shims on the side metal plates. This ensures that the annular iron shims attached to the sample are symmetrical and aligned, and the side metal plates continuously maintain a tight bond between the annular iron shims and the sample, making the bond stronger and easier to install and remove. This improves the efficiency of the sample application and allows for better acquisition of acoustic emission signals from inside the rock during the test, thereby increasing the success rate of the test. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the device of this utility model.

[0017] Figure 2 This is a top view of the metal sheet on the side of the device.

[0018] Figure 3 yes Figure 1 Enlarged diagram of point A in the middle.

[0019] Explanation of icon numbers: 1. Bottom metal plate; 2. Side metal plate; 3. L-shaped corner clip; 4. Limiting arc-shaped clip group; 5. Annular iron pad; 6. Adhesive layer; 7. Scattered holes; 8. Arc-shaped limiting clip; 9. Iron pad group. Detailed Implementation

[0020] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0024] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0025] This utility model provides a technical solution: a rock sample acoustic emission testing patch device, such as... Figure 1-3 As shown, it includes a bottom metal sheet 1 and two side metal sheets 2. The bottom metal sheet 1 and the side metal sheets 2 are square in shape and have the same side length. The side metal sheets 2 can be bent and installed on both sides of the bottom metal sheet 1.

[0026] This application is used for acoustic emission testing of rock samples. First, the rock sample is supported and positioned by the bottom metal plate 1. The rock sample is fixed in position on the bottom metal plate 1. The side metal plate 2 can be folded towards the rock sample to achieve further bonding of the test material.

[0027] L-shaped corner clips 3 are fixedly installed at the four corners of the upper surface of the bottom metal sheet 1. Four limiting arc-shaped clip groups 4 are fixedly installed on the upper surface of each side metal sheet 2. An annular iron pad 5 is installed inside each arc-shaped clip group. An adhesive layer 6 is provided on the upper surface of the annular iron pad 5. Several speckle holes 7 are also opened on the side metal sheet 2.

[0028] The bottom metal plate 1 is secured by four L-shaped corner clips 3, which limit the four corners of the rock sample, thus fixing the rock sample onto the bottom metal plate 1. The side metal plate 2 is fitted with four limiting arc-shaped clip groups 4 on the side that is in contact with the rock sample. Each arc-shaped clip group can movably engage an annular iron pad 5, thus pre-positioning the annular iron pad 5. With the help of the adhesive layer 6, the annular iron pad 5 can be attached to the fixed position of the rock sample after the side metal plate 2 is folded. A protective film can be pre-applied to the adhesive layer 6 and peeled off during the bonding process to prevent the adhesion from decreasing.

[0029] The speckle hole 7 can be painted when the side metal sheet 2 is bent and attached to the rock sample, so that several speckles are formed on the rock sample, which is convenient for observing the macroscopic movement of the rock during the shearing process. After the annular iron pad 5 is attached to the rock sample and the speckle hole 7 is painted, the side metal sheet 2 can be opened. At this time, the annular iron pad 5 will remain on the rock sample, and there will be several speckles on the rock sample, which is convenient for subsequent acoustic emission testing of the rock sample.

[0030] The bottom metal sheet 1 and the side metal sheet 2 both have a side length of 100mm. The annular iron pads 5 are arranged in a rectangular array with the geometric center of the side metal sheet as the center. The distance between the center points of two adjacent annular iron pads 5 is 60mm.

[0031] The rock sample is a cube with a side length of 100mm. Therefore, the bottom metal plate 1 and the side metal plate 2 need to be the same size as one side of the rock. This makes it easy for the positions of the annular iron pad 5 and the L-shaped corner card 3 to correspond with the rock sample. The distribution of the annular iron pad 5 makes it easy to obtain internal acoustic emission data of the rock sample from different places.

[0032] The limiting arc-shaped locking block group 4 includes three arc-shaped limiting blocks 8. The three arc-shaped limiting blocks 8 are arranged in a circular array around the center point of the annular iron pad 5. The arc-shaped limiting blocks are in movable contact with the side wall of the annular iron pad 5.

[0033] The four annular iron pads 5 on each side metal sheet 2 form two iron pad groups 9. The speckle holes 7 are arranged in a row between the two iron pad groups 9. The minimum distance between the edge of the speckle hole 7 and the edge of the side metal sheet 2 is 2mm, and the diameter of the speckle hole 7 is 2mm.

[0034] The distribution of speckled pores 7 is relatively dense, allowing for clear observation of the macroscopic movement of the rock sample during shearing.

[0035] The height of the L-shaped corner card 3 is 5mm.

[0036] The L-shaped corner card 3 serves to position the rock sample.

[0037] This invention uses an L-shaped corner clip 3 to fix the sample in place, and an annular iron pad 5 is pre-movably installed on the side metal plate 2. This allows the annular iron pads 5 attached to the sample to be symmetrical and aligned with each other, and the side metal plate 2 can continuously maintain the pressure and adhesion between the annular iron pads 5 and the sample, making the adhesion between the annular iron pads 5 and the sample more secure. It is also easy to install and remove, improving the efficiency of the sample application and enabling better acquisition of acoustic emission signals inside the rock during the test, thereby increasing the success rate of the test.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rock sample acoustic emission test patch device, characterized by, It includes a bottom metal plate (1) and two side metal plates (2). The side metal plates (2) are bendable and installed on both sides of the bottom metal plate (1). L-shaped corner cards (3) are fixedly installed at the four corners of the upper surface of the bottom metal plate (1). Four limiting arc-shaped card blocks (4) are fixedly installed on the upper surface of each side metal plate (2). Several speckle holes (7) are opened on the side metal plate (2).

2. The rock sample acoustic emission test patch apparatus of claim 1, wherein, Each of the limiting arc-shaped locking block groups (4) has an annular iron pad (5) installed inside, and the upper surface of the annular iron pad (5) is provided with an adhesive layer (6).

3. The rock sample acoustic emission test patch apparatus of claim 2, wherein, The limiting arc-shaped locking block group (4) includes three arc-shaped limiting blocks (8). The three arc-shaped limiting blocks (8) are arranged in a circular array around the center point of the annular iron pad (5). The arc-shaped limiting blocks (8) are in contact with the side wall of the annular iron pad (5).

4. The rock sample acoustic emission test patch apparatus of claim 2, wherein, The four annular iron pads (5) on each of the side metal sheets (2) form two iron pad groups (9), and the speckled holes (7) are arranged in rows between the two iron pad groups (9).

5. The rock sample acoustic emission test patch apparatus of claim 4, wherein, The minimum distance between the edge of the speckle hole (7) and the edge of the side metal sheet (2) is 2mm, and the diameter of the speckle hole (7) is 2mm.

6. The rock sample acoustic emission test patch apparatus of claim 2, wherein, The bottom metal sheet (1) and the side metal sheet (2) both have a side length of 100mm. The annular iron pads (5) are arranged in a rectangular array with the geometric center of the side metal sheet (2) as the center. The distance between the center points of two adjacent annular iron pads (5) is 60mm.

7. The rock sample acoustic emission test patch apparatus of claim 1, wherein, The height of the L-shaped corner card (3) is 5mm.

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