A coal mining machine cutting diversification test experimental platform

Abstract

This invention relates to the field of automatic control technology and discloses a diversified testing platform for coal mining machine cutting, including a coal mining machine and a coal mining machine moving guide rail. It aims to solve the problems of a single path trajectory for the coal mining machine during cutting, incomplete signal acquisition, and a limited number of test variables, which are not conducive to a comprehensive evaluation of the coal mining machine's overall performance. This coal mining machine cutting testing platform uses cast coal walls of different hardnesses to simulate different pressures on the coal wall through hydraulic supports on the left, right, and top sides of the gantry frame. The guide rail at the bottom of the coal mining machine controls its lateral and longitudinal movement. Various required data are detected by the rocker arm and internal detection modules of the coal mining machine, thereby completing tests on different cutting angles and coal walls of different hardnesses. The platform allows for multi-faceted comparison of test results under different conditions, enabling comparative testing under multiple working conditions. The diverse range of test variables facilitates a comprehensive evaluation of the coal mining machine's overall performance.

Description

Technical Field

[0001] This invention belongs to the field of automatic control technology, specifically a diverse testing and experimental platform for coal mining machine cutting. Background Technology

[0002] Coal mining machines are indispensable pieces of equipment in coal mining, widely used in the process to cut, excavate, and transport coal. In the design, development, and optimization of coal mining machines, experimental platforms play a crucial role as important testing tools.

[0003] Existing coal mining machine testing platforms typically possess functions such as simulating different coal seam conditions, verifying coal mining machine performance, and evaluating operational efficiency, providing data support for coal mining machine research and development. However, existing coal mining machine testing platforms have certain limitations in practical applications. Currently, many traditional coal mining machine testing platforms struggle to realistically and comprehensively simulate complex coal mine environments. For example, for adaptability testing of different types of coal seams, existing platforms can only simulate a few standard coal seams, failing to comprehensively cover the diverse geological conditions of complex coal mines. Furthermore, the testing accuracy and reliability of existing platforms often fail to meet high-standard research and development requirements, leading to certain deviations in test results and affecting the performance evaluation of coal mining machines. Another issue is that existing coal mining machine testing platforms are often bulky, costly, and require significant manpower for maintenance and operation during long-term operation. Therefore, there is considerable room for improvement in existing platforms regarding energy conservation and emission reduction, automation levels, and equipment maintenance.

[0004] With the development of coal mining machine technology, especially the emergence of intelligent and automated coal mining machines, existing experimental platforms are increasingly inadequate to meet new technological demands. How to enhance the accurate simulation and testing of complex geological environments, different coal seam conditions, and various coal mining machine performance parameters within experimental platforms has become a crucial issue in the current technological field. Therefore, there is an urgent need to develop a new coal mining machine experimental platform that can simulate more complex coal mine working environments while improving testing accuracy, reducing costs, and adding automated operation capabilities. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the present invention provides a diversified testing experimental platform for coal mining machine cutting, which effectively solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a coal mining machine cutting variety test experimental platform, including a coal mining machine, a coal mining machine moving guide rail, a gantry frame, a casting block, a pressurizing device, a detection device and an information transfer device, wherein the coal mining machine is installed at the front end of the gantry frame, and the coal mining machine moving guide rail is installed at the right front end of the gantry frame at the bottom of the coal mining machine; The coal mining machine's moving guide rails include transverse moving guide rails and longitudinal moving guide rails; The gantry frame is installed near the coal mining machine drum; The casting block is fixed inside the gantry frame; Multiple pressurizing devices are provided and installed on the top and sides of the gantry frame respectively, providing pressure to the top and sides of the casting block. The detection device is installed in the rocker arm and inside the coal mining machine, and is divided into a first detection module and a second detection module. The first detection module detects the vibration signal of the rocker arm, and the second detection module detects the sound signal.

[0007] Preferably, the lateral moving guide rail includes a first lateral moving guide rail and a second lateral moving guide rail, and the longitudinal moving guide rail includes a first longitudinal moving guide rail and a second longitudinal moving guide rail; The No. 1 steel frame base and the No. 2 steel frame base are fixed to the workbench floor by several No. 2 expansion nuts. The No. 1 horizontal moving guide rail, the No. 2 horizontal moving guide rail, the No. 1 longitudinal moving guide rail, and the No. 2 longitudinal moving guide rail are laid on the steel frame structure and divided into two tracks, namely the horizontal moving guide rail and the longitudinal moving guide rail. The horizontal moving guide rail is perpendicular to the gantry frame, and the longitudinal moving guide rail is parallel to the gantry frame.

[0008] Preferably, a lateral pushing hydraulic cylinder is installed between the first lateral moving guide rail and the second lateral moving guide rail of the lateral moving guide rail, and a longitudinal pushing hydraulic cylinder is installed between the first longitudinal moving guide rail and the second longitudinal moving guide rail of the longitudinal moving guide rail. When the coal mining machine needs to move laterally, the lateral pushing hydraulic cylinder is pressurized, and the hydraulic rod inside the lateral pushing cylinder extends to push the coal mining machine to move laterally. When the coal mining machine needs to move laterally or longitudinally, the longitudinal pushing hydraulic cylinder is pressurized, and the hydraulic rod inside the longitudinal pushing cylinder extends to push the coal mining machine to move longitudinally.

[0009] Preferably, the gantry frame is installed on the parallel side of the coal mining machine drum. The gantry frame base is fixed to the workbench floor by several No. 1 expansion nuts and several No. 4 expansion nuts. One section of the No. 1 support side beam is welded to the gantry frame base, and the other section is welded to the gantry frame side wall. One section of the No. 2 support side beam is welded to the gantry frame base, and the other section is welded to the gantry frame side wall. The No. 1 and No. 2 support side beams are located on both sides of the gantry frame and welded to a side wall different from the gantry frame. At the same time, the gantry frame side wall is also welded to the gantry frame base. One section of the No. 3 and No. 4 support side beams are welded to the rear side of the gantry frame side wall, and the other section is welded to the gantry frame base. The lower part of the gantry frame base is fixed to the workbench floor by several No. 3 expansion nuts. The No. 3 and No. 4 support side beams are symmetrically arranged. The gantry frame is made of steel profiles and has a symmetrical structure on both sides, which makes it more stable.

[0010] Preferably, the hardness of the cast block and the ratio of coal to gangue can be freely set, so that the coal mining machine can conduct cutting experiments on coal walls of different hardness and in different states.

[0011] Preferably, the pressurizing device is divided into a top pressurizing section and a side pressurizing section; The top pressurization section consists of a No. 1 top hydraulic cylinder and a No. 2 top hydraulic cylinder embedded in the top beam of the gantry frame. The No. 1 top hydraulic cylinder and the No. 2 top hydraulic cylinder are symmetrically distributed. The No. 1 top hydraulic cylinder and the No. 2 top hydraulic cylinder pressurize to simulate the pressure of the top of the coal wall on the cutting surface. The side pressurization part is composed of a No. 1 side hydraulic cylinder, a No. 2 side hydraulic cylinder, a No. 3 side hydraulic cylinder and a No. 4 side hydraulic cylinder embedded in the side wall of the gantry frame. The No. 2 side hydraulic cylinder and the No. 3 side hydraulic cylinder are located on the same side, and the No. 1 side hydraulic cylinder and the No. 4 side hydraulic cylinder are located on the same side. The No. 3 side hydraulic cylinder and the No. 4 side hydraulic cylinder are symmetrically distributed, and similarly, the No. 1 side hydraulic cylinder and the No. 2 side hydraulic cylinder are symmetrically distributed. The side hydraulic pressurization simulates the pressure of the coal seam side on the cutting layer.

[0012] Preferably, the detection device is divided into a first detection module and a second detection module; The first detection module is a vibration detection module, in which vibration sensors are installed on the rocker arm of the coal mining machine to collect vibration signals during the cutting process; The second detection module is a sound detection module. An industrial-grade microphone is installed on the rocker arm of the coal mining machine shown to collect sound signals during the cutting process. The acquired signals are collected by a data acquisition card. The vibration and sound signals are fused and analyzed by the industrial control computer algorithm to identify the cutting status of the coal mining machine.

[0013] Preferably, the information relay device is installed on the left side of the coal mining machine's moving guide rail. The feature signals collected by the detection device are sent to the 5G LoRa gateway module of the industrial control computer through the 5G LoRa gateway module. The data received by the gateway module is fused in time and space, and the cutting status of the coal mining machine and the hardness of the coal wall are determined by analyzing the fused results.

[0014] Preferably, after the industrial control computer finishes analysis and processing, it sends control commands to the coal mining machine control module through the 5G LoRa gateway module based on the analysis results, thereby controlling the cutting speed of the coal mining machine. When the coal wall hardness coefficient is high, reduce the drum speed and increase the torque; when the coal wall hardness coefficient is low, increase the drum speed and decrease the torque.

[0015] Preferably, during the cutting process, the lateral pushing cylinder pushes the coal mining machine to move along the lateral moving guide rail to cut the cast block laterally. While the coal mining machine moves laterally, it can also move longitudinally as needed, and the lateral and longitudinal cutting are carried out simultaneously. During the cutting process, signal acquisition is carried out simultaneously.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention provides a diversified testing platform for coal mining machine cutting, which can complete the testing and research of different cutting angles and different cutting methods, compare the test results under different conditions from multiple perspectives, and realize comparative testing under multiple working conditions.

[0017] 2. This invention provides a diversified testing platform for coal mining machine cutting. It adopts dual detection modules for collaborative data acquisition. After spatiotemporal fusion processing, the data can simultaneously reflect the mechanical load and energy loss of the coal mining machine cutting, and can more comprehensively capture the performance shortcomings in the cutting process.

[0018] 3. This invention provides a diversified testing platform for coal mining machine cutting. The proportion of coal and gangue can be freely adjusted by pouring in the form of lump coal, which can simulate the full hardness gradient from soft coal seams to coal seams containing hard gangue. With the addition of multiple sets of hydraulic cylinders on the top and sides of the gantry frame, it can accurately replicate the top covering pressure and lateral surrounding rock pressure of coal seams at different burial depths, thus solving the limitation of traditional platforms that can only simulate a single homogeneous coal seam.

[0019] 4. This invention provides a diverse testing platform for coal mining machine cutting. The gantry frame adopts a symmetrical steel structure design, with multiple sets of supporting side beams and four expansion nuts for fixation. It has high overall rigidity and strong vibration resistance, and can withstand the impact load when the coal mining machine cuts hard gangue, avoiding equipment displacement or deformation during the experiment. At the same time, the platform components adopt a modular design, so there is no need to shut down the entire machine for later maintenance, and the casting blocks can be repeatedly cast and reused, which greatly reduces the cost of consumables and the workload of maintenance.

[0020] 5. This invention provides a diverse testing platform for coal mining machine cutting, which relies on the real-time data transmission capability of the 5G LoRa gateway module and combines the multi-signal fusion algorithm of the industrial control computer to achieve fully automated closed-loop control. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0022] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of the coal mining machine cutting variety test platform provided in an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the forward-looking structure; Figure 3 for Figure 2 A top-view structural diagram; Figure 4 for Figure 2 A schematic diagram of the structure in the rear-view direction; Figure 5 for Figure 2 A schematic diagram of the structure viewed from below; Figure 6 for Figure 2 A schematic diagram of the structure in the left-view direction; Figure 7 This is a schematic diagram of the working state of the coal mining machine cutting diversity test platform according to an embodiment of the present invention.

[0023] In the diagram: 1-Gantry frame, 2-Side support beam 1, 3-Side hydraulic cylinder 1, 4-Side support beam 2, 5-Side hydraulic cylinder 2, 6-Side hydraulic cylinder 3, 7-Side hydraulic cylinder 4, 8-Coal mining machine drum, 9-Top hydraulic cylinder 1, 10-Top hydraulic cylinder 2, 11-Cast block, 12-Coal mining machine rocker arm, 13-Industrial microphone, 14-Vibration sensor, 15-Gantry frame base, 16-Coal mining machine base, 17-5G LoRa gateway module, 18-Longitudinal pushing cylinder, 19-First longitudinal moving guide rail, 20-Second longitudinal moving guide rail, 21-First steel frame structure base, 22-Third support side beam, 23-Second steel frame structure base, 24-First transverse moving guide rail, 25-Transverse pushing cylinder, 26-Second transverse moving guide rail, 27-Fourth support side beam, 28-First expansion nut, 29-Second expansion nut, 30-Third expansion nut, 31-Fourth expansion nut. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] like Figure 1-7 As shown, the present invention provides a diverse testing platform for coal mining machine cutting, including a coal mining machine, a coal mining machine moving guide rail, a gantry frame 1, a casting block 11, a pressurizing device, a testing device, and an information transfer device. The coal mining machine is installed at the front end of the gantry frame 1, and the coal mining machine moving guide rail is installed at the right front end of the gantry frame 1 at the bottom of the coal mining machine. The coal mining machine's moving guide rails include transverse moving guide rails and longitudinal moving guide rails; The gantry frame 1 is installed near the coal mining machine drum 8; The casting block 11 is fixed inside the gantry frame 1; Multiple pressurizing devices are provided and installed on the top and sides of the gantry frame 1, respectively, to provide pressure to the top and sides of the casting block 11. The detection device is installed in the rocker arm 12 of the coal mining machine and is divided into a first detection module and a second detection module. The first detection module detects the vibration signal of the rocker arm, and the second detection module detects the sound signal. On the moving guide rail of the coal mining machine, the coal mining machine can move laterally or longitudinally to cut at different angles.

[0026] Advantageously, the lateral moving guide rail includes a first lateral moving guide rail 24 and a second lateral moving guide rail 26, and the longitudinal moving guide rail includes a first longitudinal moving guide rail 19 and a second longitudinal moving guide rail 20. The steel frame structure is fixed to the workbench floor by several No. 4 expansion nuts 31. The No. 1 transverse moving guide rail 24, the No. 2 transverse moving guide rail 26, the No. 1 longitudinal moving guide rail 19 and the No. 2 longitudinal moving guide rail 20 are laid on the steel frame structure and divided into two tracks, namely the transverse moving guide rail and the longitudinal moving guide rail. The transverse moving guide rail is perpendicular to the gantry frame 1 and the longitudinal moving guide rail is parallel to the gantry frame 1.

[0027] Advantageously, a lateral pushing hydraulic cylinder 25 is installed between the first lateral moving guide rail 24 and the second lateral moving guide rail 26 of the lateral moving guide rail, and a longitudinal pushing hydraulic cylinder 18 is installed between the first longitudinal moving guide rail 19 and the second longitudinal moving guide rail 20 of the longitudinal moving guide rail. When the coal mining machine needs to move laterally, the lateral pushing hydraulic cylinder 25 is pressurized, and the hydraulic rod inside the lateral pushing cylinder 25 extends to push the coal mining machine to move laterally. When the coal mining machine needs to move laterally or longitudinally, the longitudinal pushing hydraulic cylinder 25 is pressurized, and the hydraulic rod inside the longitudinal pushing cylinder 18 extends to push the coal mining machine to move longitudinally.

[0028] Advantageously, the gantry frame 1 is installed on the parallel side of the coal mining machine drum 8. The gantry frame base 15 is fixed to the workbench ground by a number of No. 1 expansion nuts 28. One section of the No. 1 support side beam 2 is welded to the gantry frame base 15, and the other section is welded to the side wall of the gantry frame 1. One section of the No. 2 support side beam 4 is welded to the gantry frame base 15, and the other section is welded to the side wall of the gantry frame 1. The No. 1 support side beam 2 and the No. 2 support side beam 4 are located on both sides of the gantry frame 1 and are welded to different side walls from the gantry frame 1. At the same time, the side wall of the gantry frame 1 is also welded to the gantry frame base 15. One section of the No. 3 support side beam 22 and the No. 4 support side beam 27 are both welded to the rear side of the side wall of the gantry frame 1, and the other section is welded to the gantry frame base 15. The No. 3 support side beam 22 and the No. 4 support side beam 27 are symmetrically arranged. The gantry frame 1 is composed of steel profiles, and the two sides of the gantry frame 1 have a symmetrical structure, which makes the structure more stable.

[0029] Advantageously, the hardness of the cast block 11 and the ratio of coal to gangue can be freely set, thereby enabling the coal mining machine to conduct experiments cutting coal walls of different hardness and in different states.

[0030] Advantageously, the pressurizing device is divided into a top pressurizing section and a side pressurizing section; The top pressurization section consists of a No. 1 top hydraulic cylinder 9 and a No. 2 top hydraulic cylinder 10 embedded in the top beam of the gantry frame 1. The No. 1 top hydraulic cylinder 9 and the No. 2 top hydraulic cylinder 10 are symmetrically distributed. The No. 1 top hydraulic cylinder 9 and the No. 2 top hydraulic cylinder 10 pressurize to simulate the pressure of the top of the coal wall on the cutting surface. The side pressurization part is composed of a No. 1 side hydraulic cylinder 3, a No. 2 side hydraulic cylinder 5, a No. 3 side hydraulic cylinder 6 and a No. 4 side hydraulic cylinder 7 embedded in the side wall of the gantry frame 1. The No. 2 side hydraulic cylinder 5 and the No. 3 side hydraulic cylinder 6 are located on the same side, and the No. 1 side hydraulic cylinder 3 and the No. 4 side hydraulic cylinder 7 are located on the same side. The third side hydraulic cylinder 6 and the fourth side hydraulic cylinder 7 are symmetrically distributed, and similarly, the first side hydraulic cylinder 3 and the second side hydraulic cylinder 5 are symmetrically distributed. The side hydraulic pressurization simulates the pressure of the coal seam side on the cutting layer.

[0031] Preferably, the detection device is divided into a first detection module and a second detection module; The first detection module is a vibration detection module. Vibration sensor 14 is installed on the rocker arm 12 of the coal mining machine to collect vibration signals during the cutting process. The second detection module is a sound detection module. An industrial-grade microphone 13 is installed on the rocker arm of the coal mining machine shown in Figure 12 to collect sound signals during the cutting process. The acquired signals are collected by a data acquisition card. The vibration and sound signals are fused and analyzed by the industrial control computer algorithm to identify the cutting status of the coal mining machine.

[0032] Advantageously, the information relay device is installed on the left side of the coal mining machine's moving guide rail. The characteristic signals collected by the detection device are sent to the 5G LoRa gateway module 17 of the industrial control computer through the 5G LoRa gateway module 17. The data received by the gateway module is fused in time and space, and the cutting status of the coal mining machine and the hardness of the coal wall are determined by analyzing the fused results.

[0033] Advantageously, after the industrial control computer finishes the analysis and processing, it sends the control command to the coal mining machine control module through the 5G LoRa gateway module 17 based on the analysis results, thereby controlling the cutting speed of the coal mining machine. When the coal wall hardness coefficient is high, reduce the drum speed and increase the torque; when the coal wall hardness coefficient is low, increase the drum speed and decrease the torque.

[0034] Advantageously, during the cutting process, the lateral pushing cylinder 25 pushes the coal mining machine to move along the lateral moving guide rail to cut the cast block 11 laterally. While the coal mining machine moves laterally, it can also move longitudinally as needed, and the lateral and longitudinal cutting are carried out simultaneously. During the cutting process, signal acquisition is carried out simultaneously.

[0035] Working Process: First, adjust the proportion of cast coal and gangue according to the target coal seam type. After solidification, fix it inside the gantry frame. Apply corresponding pressure through top and side hydraulic cylinders to replicate the mechanical environment of the real coal seam. Then, start and calibrate the industrial control computer, 5G LoRa gateway, and detection module. Install the coal mining machine on the moving guide rail and verify that the equipment communication and operation are normal, completing the experimental preparation. Next, start the experiment. The coal mining machine drum rotates, and the lateral push cylinder pushes it along the guide rail to cut the cast coal block. When simulating composite cutting conditions, the longitudinal push cylinder moves synchronously to achieve longitudinal and lateral linkage of the coal mining machine. Sensors collect vibration and sound signals in real time during the cutting process, which are transmitted to the industrial control computer via the 5G LoRa gateway. After the system analyzes the data to determine the coal wall hardness, it automatically adjusts the drum speed and torque. In hard coal areas, the speed is reduced and the torque is increased to prevent overload, while in soft coal areas, the speed is increased and the torque is reduced to improve efficiency. During the experiment, the industrial control computer synchronously stores the cutting parameter sensor data and supports real-time viewing of data curves. If abnormalities such as excessive vibration or sudden increase in torque occur, manual intervention or suspension of the experiment is possible.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test platform for diverse cutting methods in coal mining machines, characterized in that, It includes a coal mining machine, a coal mining machine moving guide rail, a gantry (1), a casting block (11), a pressurizing device, a detection device and an information transfer device. The coal mining machine is installed at the front end of the gantry (1), and the coal mining machine moving guide rail is installed at the right front end of the gantry (1) at the bottom of the coal mining machine. The coal mining machine's moving guide rails include transverse moving guide rails and longitudinal moving guide rails; The gantry (1) is installed near the coal mining machine drum (8); The casting block (11) is fixed inside the gantry frame (1); Multiple pressurizing devices are provided and installed on the top and sides of the gantry (1) respectively, providing pressure to the top and sides of the casting block (11). The detection device is installed in the rocker arm (12) of the coal mining machine and is divided into a first detection module and a second detection module. The first detection module detects the vibration signal of the rocker arm, and the second detection module detects the sound signal.

2. The coal mining machine cutting diversity test platform according to claim 1, characterized in that, The transverse moving guide rail includes a first transverse moving guide rail (24) and a second transverse moving guide rail (26), and the longitudinal moving guide rail includes a first longitudinal moving guide rail (19) and a second longitudinal moving guide rail (20). The No. 1 steel frame structure base (21) and the No. 2 steel frame structure base (23) are fixed on the workbench ground by several No. 2 expansion nuts (29). The No. 1 horizontal moving guide rail (24), the No. 2 horizontal moving guide rail (26), the No. 1 longitudinal moving guide rail (19) and the No. 2 longitudinal moving guide rail (20) are laid on the steel frame structure and divided into two tracks, namely the horizontal moving guide rail and the longitudinal moving guide rail. The horizontal moving guide rail is perpendicular to the gantry frame (1) and the longitudinal moving guide rail is parallel to the gantry frame (1).

3. The coal mining machine cutting diversity test platform according to claim 2, characterized in that, A transverse pushing hydraulic cylinder (25) is installed between the first transverse moving guide rail (24) and the second transverse moving guide rail (26) of the transverse moving guide rail, and a longitudinal pushing hydraulic cylinder (18) is installed between the first longitudinal moving guide rail (19) and the second longitudinal moving guide rail (20) of the longitudinal moving guide rail. When the coal mining machine needs to move laterally, the lateral pushing hydraulic cylinder (25) is pressurized, and the hydraulic rod inside the lateral pushing cylinder (25) extends out to push the coal mining machine to move laterally. When the coal mining machine needs to move laterally or longitudinally, the longitudinal pushing hydraulic cylinder (25) is pressurized, and the hydraulic rod inside the longitudinal pushing cylinder (18) extends out to push the coal mining machine to move longitudinally.

4. A diversified testing platform for coal mining machine cutting as described in claim 3, characterized in that, The gantry frame (1) is installed on the parallel side of the coal mining machine drum (8). The gantry frame base (15) is fixed to the workbench ground by several No. 1 expansion nuts (28) and several No. 4 expansion nuts (31). One section of the No. 1 support side beam (2) is welded to the gantry frame base (15), and the other section is welded to the side wall of the gantry frame (1). One section of the No. 2 support side beam (4) is welded to the gantry frame base (15), and the other section is welded to the side wall of the gantry frame (1). The No. 1 support side beam (2) and the No. 2 support side beam (4) are respectively located at... Welded to the sides of the gantry frame (1) on different side walls from the gantry frame (1), and the side walls of the gantry frame (1) are also welded to the gantry frame base (15). One section of the No. 3 support side beam (22) and the No. 4 support side beam (27) are welded to the rear side of the side wall of the gantry frame (1), and the other section is welded to the gantry frame base (15). At the same time, the lower part of the gantry frame base (15) is fixed to the workbench floor by several No. 3 expansion nuts (30). The No. 3 support side beam (22) and the No. 4 support side beam (27) are symmetrically arranged. The gantry frame (1) is made of steel profiles and has a symmetrical structure on both sides, which makes it more stable.

5. A coal mining machine cutting variety test platform according to claim 4, characterized in that, The hardness of the cast block (11) and the ratio of coal to gangue can be freely set, so that the coal mining machine can perform cutting experiments on coal walls of different hardness and different states.

6. A coal mining machine cutting variety test platform according to claim 5, characterized in that, The pressurizing device is divided into a top pressurizing section and a side pressurizing section; The top pressurization part consists of a No. 1 top hydraulic cylinder (9) and a No. 2 top hydraulic cylinder (10) embedded in the top beam of the gantry frame (1). The No. 1 top hydraulic cylinder (9) and the No. 2 top hydraulic cylinder (10) are symmetrically distributed. The No. 1 top hydraulic cylinder (9) and the No. 2 top hydraulic cylinder (10) pressurize to simulate the pressure of the top of the coal wall on the cutting surface. The side pressurization part is composed of a No. 1 side hydraulic cylinder (3), a No. 2 side hydraulic cylinder (5), a No. 3 side hydraulic cylinder (6) and a No. 4 side hydraulic cylinder (7) embedded in the side wall of the gantry (1). The No. 2 side hydraulic cylinder (5) and the No. 3 side hydraulic cylinder (6) are located on the same side, and the No. 1 side hydraulic cylinder (3) and the No. 4 side hydraulic cylinder (7) are located on the same side. The No. 3 side hydraulic cylinder (6) and the No. 4 side hydraulic cylinder (7) are symmetrically distributed. Similarly, the No. 1 side hydraulic cylinder (3) and the No. 2 side hydraulic cylinder (5) are symmetrically distributed. The side hydraulic pressurization simulates the pressure of the coal seam side on the cutting layer.

7. A coal mining machine cutting variety test platform according to claim 6, characterized in that, The detection device is divided into a first detection module and a second detection module; The first detection module is a vibration detection module. The vibration sensor (14) is installed on the rocker arm (12) of the coal mining machine to collect vibration signals during the cutting process. The second detection module is a sound detection module. An industrial-grade microphone (13) is installed on the rocker arm of the coal mining machine shown in (12) to collect sound signals during the cutting process. The acquired signals are collected by a data acquisition card. The vibration and sound signals are fused and analyzed by the industrial control computer algorithm to identify the cutting status of the coal mining machine.

8. A coal mining machine cutting variety test platform according to claim 7, characterized in that, The information relay device is installed on the left side of the coal mining machine's moving guide rail. The characteristic signals collected by the detection device are sent to the 5G LoRa gateway module (17) of the industrial control computer through the 5G LoRa gateway module (17). The data received by the gateway module is fused in time and space, and the cutting status of the coal mining machine and the hardness of the coal wall are determined by analyzing the fused results.

9. A diversified testing platform for coal mining machine cutting according to claim 8, characterized in that, After the industrial control computer finishes the analysis and processing, it sends the control command to the coal mining machine control module through the 5G LoRa gateway module (17) based on the analysis results, thereby controlling the cutting speed of the coal mining machine. When the coal wall hardness coefficient is high, reduce the drum speed and increase the torque; when the coal wall hardness coefficient is low, increase the drum speed and decrease the torque.

10. A coal mining machine cutting variety test platform according to claim 9, wherein during the cutting process, the transverse pushing cylinder (25) pushes the coal mining machine to move along the transverse moving guide rail to cut the cast block (11) transversely. While the coal mining machine moves transversely, it can move longitudinally as needed, and transverse and longitudinal cutting are carried out simultaneously; during the cutting process, signal acquisition is carried out simultaneously.

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