Device and method for testing the mechanical properties of a metal mesh

Abstract

The application provides a device and method for testing mechanical properties of metal mesh, and belongs to the technical field of testing mechanical properties of metal mesh in chamber support components; the device comprises a fixing structure and a force applying assembly; the fixing structure comprises a fixing frame, and the top sidewall of the fixing frame is used for fixing the metal mesh; the force applying assembly is arranged inside the fixing frame and is installed on the bottom sidewall; the force applying assembly comprises a fixed force applying structure and a movable force applying structure; the fixed force applying structure is used for applying a loading force at a fixed position to the metal mesh; the movable force applying structure comprises a plurality of dispersed force applying parts which are arranged around the fixed force applying structure and can be slidably matched with the fixing frame to change positions, and is used for simulating dynamic disturbance suffered by the metal mesh; and the device is mainly used to solve the technical problem that the existing device for detecting deformation and mechanical properties of metal mesh deviates from the actual situation in the force applying mode, so that the test data cannot accurately reflect the actual stress condition of the metal mesh.

Description

Technical Field

[0001] This invention belongs to the technical field of mechanical property testing of metal mesh in tunnel support components, specifically relating to a device and method for testing the mechanical properties of metal mesh. Background Technology

[0002] With the improvement of the national economic modernization level and the rapid development of industrial technology, the demand for coal mining is constantly increasing, and the mining environment and geological conditions are becoming increasingly complex. Coal mine roadway support technology plays a crucial role in underground engineering, and reasonable and safe support technology is one of the major challenges in achieving efficient mine production. Under the action of high ground stress, underground tunnels gradually exhibit a series of failure modes such as spalling, floor heave, and roof collapse. Based on years of domestic and international practical experience, anchor-mesh combination support has many advantages, such as good support effect, convenient construction, and low support cost, making it the preferred support method for coal mine roadways. Conducting research on the effectiveness of anchor-mesh support is of great significance for ensuring roadway safety.

[0003] The anchor-mesh support system mainly includes components such as anchor bolts, nuts, washers, metal mesh, steel strips, and support beams. The metal mesh can transform point support from anchor bolts into surface support, expanding the support area. However, during the support process, the metal mesh experiences complex stresses, resulting in diverse deformation and failure modes. In a well-designed anchor-mesh support system, the metal mesh effectively transfers the stress of the fractured surrounding rock to the anchor bolts, ensuring the stability of the surrounding rock. Therefore, studying the deformation and mechanical properties of the metal mesh is of great significance for its design and improving the safety performance of the support system.

[0004] Current devices for detecting the deformation and mechanical properties of metal mesh have the following problems: most anchor mesh combined support testing devices use a method of loading only a specific location on the metal mesh, which ignores the dynamic disturbances experienced by other locations and cannot truly simulate the mechanical characteristics of the metal mesh in the field. Therefore, the measured parameters are not comprehensive or accurate enough, which makes it impossible to guide the design of metal mesh that meets the requirements.

[0005] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0006] The purpose of this invention is to provide an apparatus for testing the mechanical properties of metal mesh, thereby solving the technical problem that existing devices for detecting the deformation and mechanical properties of metal mesh cannot accurately reflect the actual stress conditions of the metal mesh due to deviations in the force application method. This invention also provides a method for testing the mechanical properties of metal mesh to solve the same technical problem.

[0007] To achieve the above objectives, the apparatus for testing the mechanical properties of metal mesh of the present invention provides the following technical solution:

[0008] An apparatus for testing the mechanical properties of a metal mesh includes a fixing structure for fixing the metal mesh; and a force-applying component for applying force to the metal mesh to simulate the stress state of the metal mesh. The fixing structure includes a cuboid-shaped fixing frame, one side wall of which is used to fix the metal mesh. The force-applying component is disposed inside the fixing frame and mounted on another side wall opposite to the side wall where the metal mesh is fixed. The force-applying component includes a fixed force-applying structure and a movable force-applying structure. The fixed force-applying structure is disposed in the middle of the side wall of the fixing frame and is used to apply a fixed-position loading force to the metal mesh. The movable force-applying structure includes multiple distributed force-applying parts, which are arranged around the fixed force-applying structure and can slide with the fixing frame to change positions to apply force to the metal mesh, thereby simulating the dynamic disturbances experienced by the metal mesh.

[0009] As a further optimized technical solution, the fixed force-applying structure includes a support cylinder, which is arranged perpendicular to the side wall of the fixed frame and is fixedly connected to the fixed frame. The end of the support cylinder facing the metal mesh is provided with a force-applying component that can move linearly back and forth, which is used to apply force to the middle of the metal mesh.

[0010] As a further optimized technical solution, the distributed force application part includes a support column, one end of which is slidably engaged with a fixed frame away from the metal mesh, and the other end is also provided with a force application component that can reciprocate linearly to apply force to the metal mesh; the distributed force application part also includes a driving mechanism for driving the support column to slide.

[0011] As a further optimized technical solution, the driving mechanism includes a transmission rod disposed inside the support cylinder and rotatably engaged with the fixed frame. The transmission rod is provided with multiple sets of transmission structures arranged sequentially along the axial direction. Each set of transmission structures is used to simultaneously drive two of the support columns to slide synchronously away from or towards the transmission rod.

[0012] As a further optimized technical solution, each of the transmission structures includes a transmission gear, which is fixedly connected to the transmission rod. A rack is provided on each side of the transmission gear, which is symmetrically arranged about the center of the transmission rod and meshes with the transmission gear. The rack is slidably engaged with the support cylinder, and a support column is fixedly connected to the extended end of each rack.

[0013] As a further optimized technical solution, a limiting structure is provided on the fixed frame, and the limiting structure slides with the support column to limit the sliding trajectory of the support column.

[0014] As a further optimized technical solution, a fixing plate is provided on one side of the fixed frame where the force-applying component is installed, the limiting structure is a slide rail set on the fixing plate, and the top of the support column is provided with a corresponding slide groove that matches the slide rail.

[0015] As a further optimized technical solution, the fixed frame is provided with multiple support rods arranged in a crisscross pattern on one side for fixing the metal mesh. The multiple support rods divide the metal mesh into multiple stress areas. A load-bearing block is provided at the junction of the support rods for installing fasteners for fixing the metal mesh.

[0016] As a further optimized technical solution, each load-bearing block is provided with multiple perforations, so that the perforations on any two adjacent load-bearing blocks have a variety of different distance specifications.

[0017] To achieve the above objectives, the method for testing the mechanical properties of metal mesh according to the present invention provides the following technical solution:

[0018] A method for testing the mechanical properties of metal mesh, based on the apparatus for testing the mechanical properties of metal mesh according to any one of the above-mentioned technical solutions, comprising:

[0019] Place the metal mesh on one of the outer walls of the fixed frame, and select different perforations on the load-bearing block according to the actual distance of the anchor bolts to fix the metal mesh to the fixed frame;

[0020] Connect the metal mesh to the test assembly;

[0021] The force-applying components on the fixed force-applying structure are activated to apply force to the metal mesh, and at the same time, the force-applying components in at least one of the distributed force-applying parts are activated.

[0022] Rotating the transmission rod drives the support column in the force-distributing part to slide, thereby changing the force application position and dynamically disturbing the metal mesh;

[0023] Observe and record the readings of the test components at set intervals until the metal mesh breaks.

[0024] The beneficial effects of the device for testing the mechanical properties of metal mesh in this invention are as follows: By setting up a fixed frame in the shape of a cuboid, it is convenient to fix the metal mesh. At the same time, the force-applying component is installed in the fixed frame to apply force to the metal mesh to simulate the stress state of the metal mesh. The fixed force-applying structure in the force-applying component has a fixed position to simulate the pressure borne by the metal mesh at a fixed position. The position of the movable force-applying structure in the force-applying component can be changed to simulate the dynamic disturbance experienced by the metal mesh. Compared with the existing technology that only applies force at a fixed position, more accurate parameter values ​​of the mechanical properties of the metal mesh can be obtained, thus providing data support that is closer to the actual use conditions for the research and design of metal mesh.

[0025] The beneficial effects of the method for testing the mechanical properties of metal mesh in this invention are similar to those of the apparatus for testing the mechanical properties of metal mesh, and will not be repeated here. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein:

[0027] Figure 1 This is a schematic diagram of the overall structure of a device for testing the mechanical properties of metal mesh according to an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the overall structure of the drive mechanism according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the test state structure of a metal mesh according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of a metal mesh fixed to a fixed frame according to an embodiment of the present invention. In the figure: 1. Metal mesh; 2. Fixed frame; 3. Support cylinder; 4. Force-applying component; 5. Support column; 6. Transmission rod; 7. Transmission gear; 8. Rack; 9. Limiting structure; 10. Fixed plate; 11. Support rod; 12. Load-bearing block; 13. Perforation; 14. Motor; 15. "U"-shaped connecting buckle; 16. Through hole; 17. Bolt; 18. Steel strip; 19. Pad; 20. Nut; 21. Strain gauge; 22. Connecting wire; 23. Main body of the data acquisition device; 24. Controller. Detailed Implementation

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0032] In the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0034] Example 1 of the apparatus for testing the mechanical properties of metal mesh in this invention:

[0035] This invention provides a device for testing the mechanical properties of metal mesh. By simultaneously applying force to the metal mesh using a fixed force-applying structure and a movable force-applying structure, the device fully simulates the uncertain dynamic disturbances experienced by the metal mesh in the field, thereby obtaining more accurate parameter values ​​of the mechanical properties of the metal mesh. This provides more complete data support for the research and design of metal mesh that is closer to real-world usage conditions.

[0036] Specifically, such as Figure 1 , Figure 2 As shown, the device for testing the mechanical properties of a metal mesh includes a fixing structure and a force-applying component. The fixing structure is used to fix the metal mesh 1; the force-applying component is used to apply force to the metal mesh 1 to simulate the stress state of the metal mesh 1; the metal mesh 1 collects data parameters of its deformation under stress by connecting to an external data acquisition device.

[0037] The fixing structure includes a cuboid-shaped fixing frame 2. The top sidewall of the fixing frame 2 is used to fix the metal mesh 1. The force-applying component is disposed inside the fixing frame 2 and installed on the bottom sidewall of the fixing frame 2, that is, the force-applying component is installed on the sidewall opposite to the sidewall of the fixed metal mesh 1 to facilitate applying pressure to the metal mesh 1. It should be noted that the metal mesh 1 can be fixed on any sidewall of the fixing frame 2, depending on the actual situation. This embodiment uses fixing on the top sidewall of the fixing frame 2 as an example for explanation, but it does not constitute a limitation on the scope of protection of this invention. The force-applying component includes a fixed force-applying structure and a movable force-applying structure. The fixed force-applying structure is disposed in the middle of the sidewall of the fixing frame 2 and is used to apply a fixed loading force to the metal mesh 1. The movable force-applying structure includes multiple distributed force-applying parts, which are arranged around the fixed force-applying structure and can slide and cooperate with the fixing frame 2 to change positions to apply force to the metal mesh 1, in order to simulate the dynamic disturbance experienced by the metal mesh 1.

[0038] like Figure 1 , Figure 2 As shown, the fixed force-applying structure in the force-applying component specifically includes a cylindrical support cylinder 3. The support cylinder 3 is set perpendicular to the side wall of the fixed frame 2, that is, the support cylinder 3 is installed perpendicular to the bottom side wall of the fixed frame 2, and the support cylinder 3 is fixedly connected to the fixed frame 2. A hydraulic cylinder is set at one end of the support cylinder 3 facing the metal mesh 1 as a force-applying component 4 that can move linearly back and forth, for applying force to the middle part of the metal mesh 1.

[0039] Each force-distributing component in the force-applying assembly includes a vertically arranged support column 5. One end of the support column 5 away from the metal mesh 1 is slidably engaged with the fixed frame 2 to facilitate changing the position of the support column 5. The other end is also equipped with a hydraulic cylinder as a force-applying component 4 capable of linear reciprocating motion, used to apply force to the metal mesh 1. The force-distributing component also includes a drive mechanism for driving the support column 5 to slide within the fixed frame 2 to change the force-applying position on the metal mesh 1.

[0040] like Figure 2 As shown, the driving mechanism includes a transmission rod 6 disposed inside the support cylinder 3 and rotatably engaged with the fixed frame 2. The transmission rod 6 is coaxially arranged with the support cylinder 3, and a motor 14 is disposed at the bottom of the transmission rod 6 for driving the transmission rod 6 to rotate within the fixed frame 2. Therefore, the transmission rod 6 is indirectly rotatably engaged with the fixed frame 2 through the motor 14. Multiple sets of transmission structures are arranged sequentially along the axial direction on the transmission rod 6. In this embodiment, four sets of transmission structures are provided, each set of transmission structures being used to simultaneously drive two of the support columns 5 to slide synchronously away from or towards the transmission rod 6.

[0041] Specifically, each transmission structure includes a transmission gear 7, which is fixedly connected to the transmission rod 6. Thus, rotation of the transmission rod 6 synchronously drives the transmission gear 7 to rotate. On either side of the transmission gear 7, there is a rack 8 symmetrically positioned about the center of the transmission rod 6 and meshing with the transmission gear 7. The rack 8 slides with the support cylinder 3. Each rack 8 has a support column 5 fixedly connected to its extended end. The connection can be welded, i.e., the end of the rack 8 is welded to the support column 5. When the transmission gear 7 rotates, it synchronously drives the two racks 8 to slide along the support cylinder 3. The sliding racks 8 drive the support columns 5 fixed at their ends to slide within the fixed frame 2. Since there are four sets of transmission structures, each driving two support columns 5, there are eight support columns 5 in total.

[0042] In this embodiment, the specific installation method of the rack 8 and the support cylinder 3 is as follows: Figure 2 As shown, each transmission structure has two racks 8 with "U"-shaped connecting buckles 15 fixedly connected to their ends. The "U"-shaped connecting buckles 15 slide with the opposite rack 8. Specifically, the "U"-shaped connecting buckle 15 is made by bending a long rod or a long strip plate into a shape similar to "U". One open end of the "U"-shaped connecting buckle 15 is fixedly connected to the end of one rack 8, and the other rack 8 passes through the end of the "U"-shaped connecting buckle 15 away from the opening and slides with the "U"-shaped connecting buckle 15.

[0043] The side wall of the support cylinder 3 has a through hole 16 through which the rack 8 and the "U"-shaped connecting buckle 15 slide, so that when the transmission gear 7 rotates, it can smoothly drive the two racks 8 to move and drive the support column 5 to slide.

[0044] To ensure that the sliding trajectory of the support column 5 is stable during the sliding process, a limiting structure 9 is disposed on the fixed frame 2, and the limiting structure 9 is in sliding fit with the support column 5.

[0045] In this embodiment, a fixed plate 10 is fixedly mounted on the side wall of the fixed frame 2 where the force applying assembly is installed, the limiting structure 9 is a slide rail formed on the fixed plate 10, and the top of the support column 5 is provided with a corresponding sliding slot adapted to the slide rail, so as to ensure that the support column 5 slides stably along the slide rail. In addition, the number of the slide rails is the same as the number of the support columns 5, which is also eight, and the eight slide rails are arranged in a shape of Chinese character "mi" (radiating in eight directions).

[0046] A plurality of support rods 11 arranged in a crisscross pattern are disposed on the side wall of the fixed frame 2 for fixing the metal mesh 1. In this embodiment, two transverse support rods 11 and two longitudinal support rods 11 are respectively provided, which enclose a closed force-bearing area with the edges of the fixed frame 2. The two support rods 11 divide the metal mesh 1 into nine force-bearing areas. A force-bearing block 12 is disposed at the intersection of the support rods 11, for installing a fixing member for fixing the metal mesh 1, so as to simulate the anchor bolt fixing the metal mesh 1.

[0047] Because in the actual anchor-mesh combined support system, the dimension between two adjacent anchor bolts varies according to different actual situations, a plurality of through holes 13 are formed on each force-bearing block 12, so that the through holes 13 on any two adjacent force-bearing blocks 12 have a plurality of different distance specifications therebetween. For example, the leftmost through hole 13 on one force-bearing block 12 is selected to fix the metal mesh, and the through hole 13 on the right side of the adjacent force-bearing block 12 is selected to have a different distance from the previous fixing point than the distance when the through hole 13 on the left side is selected, which is specifically selected according to the actual situation, so that the present invention can have experimental selections of various specifications.

[0048] As Figure 3 shown, the connected data acquisition device in the present invention includes strain gauges 21, connecting wires 22 and an acquisition device main body 23. The strain gauges 21 are respectively installed at different positions on the metal mesh 1, and each strain gauge 21 is connected to the acquisition device main body 23 through the connecting wire 22, so as to correspondingly collect the deformation data of each point of the metal mesh 1 during the deformation process. Specifically, in the present invention, the acquisition device main body 23 may be a digital resistance strain gauge, and in other embodiments, other data acquisition devices capable of realizing data collection may also be selected.

[0049] The specific working principle of the device for testing the mechanical properties of the metal mesh in the present invention is as follows: first, the metal mesh 1 is fixed on the outer side wall of the top of the fixed frame 2, and the specific fixing manner is as Figure 4As shown, by using bolts 17 to pass through the load-bearing block 12, metal mesh 1, steel strip 18, and pad 19 in sequence, and finally fixed by nuts 20, the specific installation method of the metal mesh on site is simulated. In this embodiment, W-shaped steel strip is selected for steel strip 18. During the fixing process, the perforations 13 at different positions on the load-bearing block 12 are adjusted according to the different distances of the anchor rods. After the metal mesh 1 is fixed, the hydraulic cylinder on the fixed force-applying structure is activated to apply pressure to the metal mesh 1, and at the same time, each support column 5 is driven to slide. During the sliding process, the hydraulic cylinder on the support column 5 is driven to apply pressure to the metal mesh 1. Any number of hydraulic cylinders on the support column 5 can be selected to operate. It should be noted that it is necessary to ensure that the hydraulic cylinder on the support column 5 operates. Therefore, at least one hydraulic cylinder on the support column 5 should be driven to apply pressure to the metal mesh, simulating the uncertain dynamic disturbance that the metal mesh 1 is subjected to on site.

[0050] In other embodiments of the apparatus for testing the mechanical properties of metal mesh, unlike Embodiment 1, the sliding engagement between the rack and the support cylinder can be such that the support cylinder is provided with opposing sliding tracks, and the side of each rack away from the gear meshes and slides on the sliding track.

[0051] In other embodiments of the apparatus for testing the mechanical properties of metal mesh, unlike Embodiment 1, the force-applying component is a jack in this embodiment, while in other embodiments, the force-applying component may also be an electric push rod.

[0052] In other embodiments of the device for measuring the mechanical properties of metal mesh, unlike embodiment 1, the limiting structure in this embodiment is a groove set on the fixed plate. In this case, the diameter of the end of the support column facing the groove is adapted to the groove, and the support column slides in the groove.

[0053] In other embodiments of the device for measuring the mechanical properties of metal mesh, unlike Embodiment 1, in this embodiment, a steel reinforcement beam can be used instead of the steel strip in Embodiment 1 to conduct the experiment, simulating another actual situation of using a steel reinforcement beam on site. In other embodiments, the installation of the steel strip can also be cancelled, depending on the actual situation on site.

[0054] Example 1 of the method for testing the mechanical properties of metal mesh according to the present invention:

[0055] A method for testing the mechanical properties of a metal mesh, based on the apparatus for testing the mechanical properties of a metal mesh according to any one of the above embodiments, includes: first, placing the metal mesh 1 on an outer wall of a fixed frame 2; selecting different perforations 13 on the load-bearing block 12 according to the actual distance of the anchor rod to fix the metal mesh 1 to the fixed frame 2; then connecting the metal mesh 1 to an external data acquisition component; subsequently, activating the force-applying component 4 on the fixed force-applying structure to apply force to the metal mesh 1, and simultaneously activating the force-applying component 4 in at least one distributed force-applying part; rotating the transmission rod 6 to drive the support column 5 in the distributed force-applying part to slide to change the force-applying position, thereby dynamically disturbing the metal mesh 1; observing and recording the readings of the data acquisition component at set intervals until the metal mesh 1 is damaged.

[0056] By using this method to test the mechanical properties of the metal mesh supporting the chamber, more accurate parameter values ​​of the mechanical properties of the metal mesh can be obtained, thus providing data support for the research and design of metal mesh that is closer to the actual use conditions.

[0057] It is understood that the above description is merely exemplary and the embodiments of this application do not limit the scope of the application.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention shall be within the scope of protection of the pending claims of the present invention.

Claims

1. A device for testing the mechanical properties of a metal mesh, comprising a fixing structure for fixing a metal mesh (1); and a force-applying component for applying force to the metal mesh (1) to simulate the stress state of the metal mesh (1); characterized in that, The fixed structure includes a rectangular fixed frame (2), one side wall of the fixed frame (2) is used to fix the metal mesh (1), and the force application component is set inside the fixed frame (2) and installed on another side wall opposite to the side wall of the fixed metal mesh (1); the force application component includes a fixed force application structure and a movable force application structure. The fixed force application structure is set in the middle of the side wall of the fixed frame (2) and is used to apply a fixed loading force to the metal mesh (1). The movable force application structure includes multiple dispersed force application parts. The multiple dispersed force application parts are arranged around the fixed force application structure and can slide with the fixed frame (2) to change the position to apply force to the metal mesh (1) to simulate the dynamic disturbance experienced by the metal mesh (1).

2. The apparatus for testing the mechanical properties of metal mesh according to claim 1, characterized in that, The fixed force-applying structure includes a support cylinder (3), which is set perpendicular to the side wall of the fixed frame (2) and is fixedly connected to the fixed frame (2). The end of the support cylinder (3) facing the metal mesh (1) is provided with a force-applying component (4) that can move linearly back and forth, which is used to apply force to the middle part of the metal mesh (1).

3. The apparatus for testing the mechanical properties of metal mesh according to claim 2, characterized in that, The force-dispersing part includes a support column (5), one end of which is slidably engaged with a fixed frame (2) away from the metal mesh (1), and the other end is also provided with a force-applying component (4) that can move linearly back and forth, for applying force to the metal mesh (1); the force-dispersing part also includes a driving mechanism for driving the support column (5) to slide.

4. The apparatus for testing the mechanical properties of metal mesh according to claim 3, characterized in that, The driving mechanism includes a transmission rod (6) disposed inside the support cylinder (3) and rotatably engaged with the fixed frame (2). The transmission rod (6) is provided with multiple sets of transmission structures arranged sequentially along the axial direction. Each set of transmission structures is used to simultaneously drive two of the support columns (5) to slide synchronously away from or close to the transmission rod (6).

5. The apparatus for testing the mechanical properties of metal mesh according to claim 4, characterized in that, Each of the transmission structures includes a transmission gear (7), which is fixedly connected to the transmission rod (6). On both sides of the transmission gear (7), there is a rack (8) that is symmetrically arranged about the center of the transmission rod (6) and meshes with the transmission gear (7). The rack (8) is slidably engaged with the support cylinder (3). Each rack (8) is fixedly connected to a support column (5) at its end.

6. The apparatus for testing the mechanical properties of metal mesh according to any one of claims 3-5, characterized in that, The fixed frame (2) is provided with a limiting structure (9), which slides with the support column (5) to limit the sliding trajectory of the support column (5).

7. The apparatus for testing the mechanical properties of metal mesh according to claim 6, characterized in that, The fixed frame (2) has a fixed plate (10) on one side where the force-applying component is installed. The limiting structure (9) is a slide rail set on the fixed plate (10). The top of the support column (5) is provided with a corresponding slide groove that matches the slide rail.

8. The apparatus for testing the mechanical properties of metal mesh according to claim 5, characterized in that, The fixed frame (2) is provided with multiple support rods (11) arranged in a crisscross pattern on one side for fixing the metal mesh (1). The multiple support rods (11) divide the metal mesh (1) into multiple stress areas. A load-bearing block (12) is provided at the junction of the support rods (11) for installing fasteners for fixing the metal mesh (1).

9. The apparatus for testing the mechanical properties of metal mesh according to claim 8, characterized in that, Each load-bearing block (12) is provided with multiple perforations (13) so that there are multiple different distance specifications between the perforations (13) on any two adjacent load-bearing blocks (12).

10. A method for testing the mechanical properties of metal mesh, characterized in that, The apparatus for testing the mechanical properties of metal mesh according to claim 9 comprises: Place the metal mesh (1) on one of the outer walls of the fixed frame (2), and select different perforations (13) on the load-bearing block (12) according to the actual distance of the anchor rod to fix the metal mesh (1) on the fixed frame (2); Connect the metal mesh (1) to the test assembly; The force-applying component (4) on the fixed force-applying structure is activated to apply force to the metal mesh (1), and at the same time, the force-applying component (4) in at least one of the distributed force-applying parts is activated. Rotate the transmission rod (6) to drive the support column (5) in the force distribution part to slide to change the force application position, so as to perform dynamic disturbance on the metal mesh (1); Observe and record the readings of the test components at set intervals until the metal mesh (1) is damaged.

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