Cable protection fixing structure of coal mining machine

Abstract

The invention discloses a coal mining machine cable protection fixing structure, and belongs to the technical field of coal mining, the coal mining machine cable protection fixing structure comprises a workbench, the workbench is provided with a scraper conveyer and a traction part, the side wall of the workbench is provided with a protection table and a cable trough, and the two ends of the protection table are respectively provided with a first adjusting assembly and a second adjusting assembly; the traction part is provided with a cable, the cable movably bypasses the first adjusting assembly and then is wound on the second adjusting assembly, the cable arranged between the first adjusting assembly and the traction part is provided with a plurality of groups of cable clamps, and the lower ends of the cable clamps are movably clamped in the cable groove; by adopting the conical part, the rubber extrusion ball and the supporting pad, the self-adaptive clamping and loosening of the cable in a motion state are realized, the cracking of an insulating layer due to breaking through the minimum bending radius is effectively avoided, and the strand breaking risk of a core wire is reduced; the detection piece is integrated with double sensors, cable hidden fault parameters are captured in real time, and early fault discovery and early fault processing are achieved.

Description

Technical Field

[0001] This invention belongs to the field of coal mining technology, and in particular relates to a protective fixing structure for coal mining machine cables. Background Technology

[0002] The coal mining machine is a key piece of equipment in a fully mechanized mining system. Its power supply and control cables need to travel long distances back and forth with the traction unit. During this process, the cables are continuously subjected to combined stresses such as high-frequency bending, torsion, dragging, and crushing by gangue, which can easily lead to faults such as core strand breakage, latent carbonization of the insulation layer, and shielding layer fracture. Therefore, cable protection and fixing are necessary. In existing technologies, coal mining machine cable protection mainly uses manual arrangement combined with rigid cable clamps for fixing. However, rigid cable clamps cannot adaptively clamp the cable as it moves. When the coal mining machine reciprocates to cut coal and rock at the working face, the cable will... Frequent bending and dragging of equipment can easily lead to stress concentration in the cable due to the constraint of cable clamps, which can easily exceed the minimum bending radius and cause insulation layer cracking. Moreover, the existing cable protection and fixing devices may have large gaps at the connection points, allowing gravel or coal generated during coal mining to fall into the cable clamps through the gaps, causing damage to the cable clamps or cables. In addition, existing cable fault detection methods are mostly offline static detection, which is difficult to detect hidden faults such as conductor strand breakage and latent carbonization of the insulation layer under load bending conditions. Delayed fault diagnosis can easily lead to safety accidents such as leakage and short circuits. Summary of the Invention

[0003] In view of the above situation and to overcome the defects of the prior art, the present invention provides a protective fixing structure for coal mining machine cables, which at least partially solves the above technical problems.

[0004] The technical solution adopted in this invention is as follows: A protective fixing structure for a coal mining machine cable includes a workbench, on which a scraper conveyor and a traction unit are installed. The traction unit is movably engaged with the workbench and located at the upper end of the scraper conveyor. A protective platform and a cable trough are installed on the side wall of the workbench. The cable trough is located between the protective platform and the workbench. A first adjusting component and a second adjusting component are respectively installed at both ends of the protective platform. A cable is installed on the traction unit. The cable movably passes around the first adjusting component and is wound around the second adjusting component. Multiple sets of cable clamps are installed on the cable located between the first adjusting component and the traction unit. The lower end of each cable clamp is movably engaged with the cable trough. Adjacent sets of cable clamps are connected to each other. The cable clamp near the traction unit is connected to the side wall of the traction unit.

[0005] The cable clamp includes a protective shell, a pushing member, and a pushing block. The pushing member includes an outer pushing member and an inner pushing member, with a sliding cavity between the outer and inner pushing members. One end of the protective shell is movably engaged in the sliding cavity, and the other end of the protective shell extends out of the sliding cavity. The side wall of the pushing member has a connecting groove, and multiple sets of connecting grooves are evenly spaced along the circumferential direction. The connecting grooves are connected to the sliding cavity. Multiple sets of pushing blocks are provided, and the pushing blocks are movably disposed through the connecting grooves. One end of the pushing block disposed in the connecting groove is connected to one end of the protective shell disposed in the sliding cavity, and the other end of the pushing block is disposed on the outside of the pushing member.

[0006] Furthermore, the cable clamp also includes a protective layer and a drag rope. One end of the protective layer and one end of the drag rope are both mounted on an external pusher. The drag rope is located at the lower end of the protective layer. The other end of the protective layer and the other end of the drag rope are movably connected to the external pusher on the adjacent cable clamp. A protective layer is connected between the cable clamp near the first adjustment component and the side wall of the protective platform.

[0007] The inner pusher has a first slot at its center, and the protective shell has a second slot at its center. The first slot and the second slot are concentric, and the diameter of the second slot is larger than the diameter of the first slot. The cable passes through the first slot. The inner sidewall of the protective shell has an annular groove, and the outer sidewall of the inner pusher is fitted with a retaining plate, which is movably engaged in the annular groove.

[0008] In a preferred embodiment of the present invention, the end of the inner pusher away from the card plate is connected to a conical member. The first slot is provided through the conical member, and the end of the second slot away from the card plate is a conical groove that matches the conical member. The conical member is movably disposed in the conical groove. The side wall of the conical member is evenly provided with multiple extrusion grooves at equal intervals along the circumferential direction. The extrusion grooves are provided through the first and second slots. An extrusion ball is movably installed in the extrusion groove. The upper end of the extrusion ball is disposed in the conical groove, and the lower end of the extrusion ball is movably engaged in the extrusion groove.

[0009] The protective shell has a support pad installed at the bottom of its side wall. The support pad is movably engaged in the cable trough. When the support pad slides along the cable trough, there is friction between the support pad and the cable trough.

[0010] Furthermore, the first adjustment component includes a detection element, which is installed inside one end of the protective platform. An arc-shaped connecting plate is installed on the upper end of the detection element. A cavity is provided between the connecting plate and the side wall of the detection element. A slot is provided on the side wall of the detection element to facilitate cable movement. The slot is located in the cavity, and the cable is movably engaged in the slot. A first detection sensor is installed on the inner side wall of the connecting plate, and a second detection sensor is installed in the slot.

[0011] In a preferred embodiment of the present invention, the second adjustment component includes a motor and a winding roller. The motor is mounted on the upper wall of the other end of the protective platform and protected by a protective cover. The motor is a two-rotation motor and is connected to a reducer. The winding roller is movably mounted inside the other end of the protective platform. The reducer and the winding roller are connected by a coupling. The rotation of the motor can drive the winding roller to rotate, and the rotation speed of the winding roller is matched with the moving speed of the traction unit.

[0012] The extrusion ball is made of rubber, which increases the friction between it and the cable.

[0013] The beneficial effects of the present invention after adopting the above structure are as follows: (1) The synergistic structure of tapered parts, rubber extrusion balls and support pads is adopted to replace the fixed constraints of traditional rigid cable clamps, so as to realize the adaptive clamping and release of the cable movement state; when the traction part pulls, it automatically clamps the cable and moves synchronously, and when it is retracted, it automatically releases the clamp, completely eliminating the problem of bending stress concentration caused by rigid constraints, effectively avoiding the insulation layer from cracking due to exceeding the minimum bending radius, and greatly reducing the risk of core wire breakage; at the same time, the segmented cable clamp is connected to the drag rope through the protective layer to form a continuous protective link, which disperses the traction stress when the cable moves back and forth, and further delays the fatigue damage of the cable.

[0014] (2) The protective shell and the pusher of the cable clamp adopt an embedded sliding fit. The adjacent cable clamps are sealed and connected by a protective layer. The cable clamps close to the protective platform are also attached to the side wall of the protective platform through the protective layer, forming a full-link sealed protective space, which completely fills the gaps at the connection of the existing device. It can effectively block the intrusion of gravel, coal and dust generated during the operation of the coal mining machine, and avoid the impact and wear of debris on the cable clamp structure or cable sheath.

[0015] (3) The detection component integrates dual sensors. During the bending and movement of the cable under load, the sensors can capture the hidden fault parameters of the cable in real time, replacing the traditional offline static detection mode, realizing early detection and early handling of faults, completely solving the problem of delayed fault investigation, effectively avoiding safety accidents such as leakage and short circuit, and improving the safety of underground operations.

[0016] (4) The winding roller, in conjunction with the adaptive cable clamp, can wind or loosen the cable in real time. When the coal mining machine is pulling back and forth, if the loose cable is dragged directly on the roadway floor, it will rub violently against the gangue and the edge of the scraper conveyor, resulting in damage to the outer sheath and exposure of the core wire. Cable winding can reduce dragging wear, prevent the cable from being crushed or squeezed, avoid knotting and twisting, reduce the safety risk of cable leakage and short circuit, and achieve precise matching between cable winding and the moving speed of the traction unit. There is no need for manual cable handling, which completely replaces the traditional manual fixing mode and greatly reduces the labor intensity of underground workers. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of a protective fixing structure for a coal mining machine cable proposed in this invention; Figure 2 This is a partial structural diagram of a coal mining machine cable protection and fixing structure proposed in this invention; Figure 3 This is a top view of a protective fixing structure for a coal mining machine cable proposed in this invention; Figure 4 This is a partial structural cross-section of a coal mining machine cable protection and fixing structure proposed in this invention. Figure 1 ; Figure 5 This is a partial structural cross-section of a coal mining machine cable protection and fixing structure proposed in this invention. Figure 2 ; Figure 6 for Figure 5 A magnified view of a portion at point A; Figure 7 This is a partial structural diagram of a coal mining machine cable protection and fixing structure proposed in this invention; Figure 8 This is a partial structural cross-section of a coal mining machine cable protection and fixing structure proposed in this invention. Figure 3 ; Figure 9 for Figure 8 A magnified view of a portion at point B; Figure 10 This is a schematic diagram of the cable clamp proposed in this invention. Figure 1 ; Figure 11 This is a schematic diagram of the cable clamp proposed in this invention. Figure 2 ; Figure 12 This is a cross-sectional view of the cable clamp proposed in this invention.

[0019] In the attached drawings: 1. Workbench, 2. Scraper conveyor, 3. Traction unit, 4. Protective platform, 5. Cable trough, 6. First adjustment component, 7. Second adjustment component, 8. Cable, 9. Cable clamp, 10. Protective shell, 11. Outer pusher, 12. Inner pusher, 13. Push block, 14. Sliding cavity, 15. Connecting groove, 16. Protective layer, 17. Drag rope, 18. First slot, 19. Second slot, 20. Annular groove, 21. Clamping plate, 22. Conical component, 23. Extrusion groove, 24. Extrusion ball, 25. Support pad, 26. Detection component, 27. Connecting plate, 28. Clamping groove, 29. First detection sensor, 30. Second detection sensor, 31. Motor, 32. Winding roller, 33. Conical groove. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] like Figures 1-12 As shown, a protective fixing structure for a coal mining machine cable includes a workbench 1, on which a scraper conveyor 2 and a traction unit 3 are installed. The traction unit 3 is movably engaged with the workbench 1 and located at the upper end of the scraper conveyor 2. A protective platform 4 and a cable trough 5 are installed on the side wall of the workbench 1. The cable trough 5 is located between the protective platform 4 and the workbench 1. A first adjusting component 6 and a second adjusting component 7 are respectively installed at both ends of the protective platform 4. A cable 8 is installed on the traction unit 3. The cable 8 movably passes around the first adjusting component 6 and is wound around the second adjusting component 7. Multiple sets of cable clamps 9 are installed on the cable 8 located between the first adjusting component 6 and the traction unit 3. The lower end of the cable clamp 9 is movably engaged with the cable trough 5. Adjacent sets of cable clamps 9 are connected to each other. The cable clamp 9 closest to the traction unit 3 is connected to the side wall of the traction unit 3.

[0023] The cable clamp 9 includes a protective shell 10, a pushing member, and a pushing block 13. The pushing member includes an outer pushing member 11 and an inner pushing member 12. A sliding cavity 14 is formed between the outer pushing member 11 and the inner pushing member 12. One end of the protective shell 10 is movably engaged in the sliding cavity 14, and the other end of the protective shell 10 extends out of the sliding cavity 14. A connecting groove 15 is formed on the side wall of the pushing member. Multiple sets of connecting grooves 15 are provided and are evenly spaced along the circumferential direction. The connecting grooves 15 are connected to the sliding cavity 14. Multiple sets of pushing blocks 13 are provided and are movably disposed through the connecting grooves 15. One end of the pushing block 13 in the connecting groove 15 is connected to one end of the protective shell 10 in the sliding cavity 14, and the other end of the pushing block 13 is located on the outside of the pushing member.

[0024] The cable clamp 9 also includes a protective layer 16 and a drag rope 17. One end of the protective layer 16 and one end of the drag rope 17 are both mounted on the external pusher 11. The drag rope 17 is located at the lower end of the protective layer 16. The other end of the protective layer 16 and the other end of the drag rope 17 are movably connected to the external pusher 11 on the adjacent cable clamp 9. The cable clamp 9 near the first adjustment component 6 is connected to the side wall of the protective platform 4 with the protective layer 16.

[0025] The inner pusher 12 has a first slot 18 at its center, and the protective shell 10 has a second slot 19 at its center. The first slot 18 and the second slot 19 are concentrically arranged, and the diameter of the second slot 19 is larger than the diameter of the first slot 18. The cable 8 is movably inserted through the first slot 18. The inner sidewall of the protective shell 10 has an annular groove 20, and the outer sidewall of the inner pusher 12 is fitted with a retaining plate 21, which is movably engaged in the annular groove 20.

[0026] The inner pusher 12 is connected to a tapered member 22 at one end away from the card plate 21. The first slot 18 is provided through the tapered member 22. The second slot 19 is a tapered groove 33 at one end away from the card plate 21, which matches the tapered member 22. The tapered member 22 is movably disposed in the tapered groove 33. The side wall of the tapered member 22 is evenly provided with multiple extrusion grooves 23 at equal intervals along the circumferential direction. The extrusion grooves 23 are provided through the first slot 18 and the second slot 19. An extrusion ball 24 is movably installed in the extrusion groove 23. The upper end of the extrusion ball 24 is disposed in the tapered groove 33, and the lower end of the extrusion ball 24 is movably engaged in the extrusion groove 23. The extrusion ball 24 is made of rubber, which can increase the friction between it and the cable 8.

[0027] A support pad 25 is installed at the bottom of the side wall of the protective shell 10. The support pad 25 is movably engaged in the cable groove 5. When the support pad 25 slides along the cable groove 5, there is friction between the support pad 25 and the cable groove 5.

[0028] It should be noted that when the pushing member is dragged by the towing rope 17 and the protective layer 16 towards the conical groove 33, the outer pushing member 11 drives the inner pushing member 12 to move towards the conical groove 33. Since the support pad 25 under the protective shell 10 is placed in the cable groove 5, the protective shell 10 will not move under the action of static friction. The inner pushing member 12 drives the extrusion ball 24 to continue moving. The conical groove 33 extrudes the extrusion ball 24, causing the extrusion ball 24 to extend out of the extrusion groove 23 and enter the first slot 18, clamping the cable 8 in the first slot 18. As the pushing member continues to move, the cable 8 and the protective shell 10 move synchronously under the action of the extrusion ball 24. The protective layer 16 protects the cable clamp 9, and the cable clamp 9 protects the cable 8. When the cable 8 moves in the reverse direction, the cable clamp 9 moves to the side wall of the protective platform 4. The first to touch the side wall of the protective platform 4 is the push block 13 at the very end. As the cable clamp 9 continues to move, the push block 13 drives the protective shell 10, and the protective shell 10 moves in the reverse direction. The conical groove 33 releases its pressure on the compression ball 24, and the compression ball 24 releases its clamping of the cable 8, making it easier for the cable 8 to move. The push blocks 13 on the other cable clamps 9 touch the protective shells 10 on the adjacent cable clamps 9 in turn, and the cable clamps 9 release their clamping of the cable 8 in turn.

[0029] The first adjustment component 6 includes a detection element 26, which is installed inside one end of the protective platform 4. An arc-shaped connecting plate 27 is installed on the upper end of the detection element 26. A cavity is provided between the connecting plate 27 and the side wall of the detection element 26. A slot 28 is provided on the side wall of the detection element 26 to facilitate the movement of the cable 8. The slot 28 is located in the cavity, and the cable 8 is movably engaged in the slot 28. A first detection sensor 29 is installed on the inner side wall of the connecting plate 27, and a second detection sensor 30 is installed in the slot 28. It should be noted that the faults of the coal mining machine cable 8 are mostly caused by the combined forces of reciprocating bending, torsion, and tension. Some hidden damages need to be detected in real time during the bending process of the cable 8 under load. Therefore, the first detection sensor 29 and the second detection sensor 30 can be miniature partial discharge sensors to detect the partial discharge of the cable 8, or miniature online insulation monitoring modules to detect the insulation resistance of the cable 8, or miniature electromagnetic interference detection probes to detect the shielding attenuation value, or fiber optic strain gauges to detect the local strain value when the cable 8 is bent.

[0030] The second adjustment component 7 includes a motor 31 and a winding roller 32. The motor 31 is mounted on the upper wall of the other end of the protective platform 4 and is protected by a protective cover. The motor 31 is a two-rotation motor 31 that rotates in both directions. The motor 31 is connected to a reducer. The winding roller 32 is movably mounted inside the other end of the protective platform 4. The reducer and the winding roller 32 are connected by a coupling. The rotation of the motor 31 can drive the winding roller 32 to rotate. The rotation speed of the winding roller 32 is matched with the moving speed of the traction unit 3.

[0031] It should be noted that the traction unit 3 can reciprocate along the worktable 1. When the traction unit 3 moves towards the detection piece 26, the motor 31 drives the winding roller 32 to rotate. The winding roller 32 winds the loosened cable 8. After the cable 8 passes through the detection piece 26 and enters the protective table 4, it is wound on the winding roller 32. At this time, the cable clamp 9 releases its grip on the cable 8 in sequence. When the traction unit 3 moves away from the detection piece 26, the motor 31 drives the winding roller 32 to rotate in the opposite direction. The winding roller 32 loosens the cable 8. The traction unit 3 clamps and drags the loosened cable 8 through the cable clamp 9. The cable 8 passes through the detection piece 26 and is discharged from the protective table 4.

[0032] The specific usage is as follows: Fix the workbench 1 at the designated position on the fully mechanized mining face, install the scraper conveyor 2 and the traction unit 3 in sequence, and test the smoothness of the reciprocating motion of the traction unit 3 to ensure stable movement speed; install the protective platform 4 and cable trough 5 on the side wall of the workbench 1, embed the detection piece 26 into one end of the protective platform 4, and install the forward and reverse motor 31 equipped with a protective cover, reducer, coupling and winding roller 32 in sequence on the other end of the protective platform 4, complete the linkage test of the motor 31 and reducer to ensure accurate speed adjustment.

[0033] The coal mining machine cable 8 is passed sequentially through the slot 28 of the detection piece 26 and the first slot 18 of multiple sets of cable clamps 9, and finally wound onto the winding roller 32; the spacing between adjacent cable clamps 9 is adjusted to ensure that the cable 8 is naturally stretched and stress-free; the bottom support pad 25 of the cable clamp 9 is inserted into the cable groove 5, and the static friction is adjusted by replacing the support pad 25 with different hardnesses. At the same time, the protective layers 16 of adjacent cable clamps 9 are tightly connected, and the cable clamps 9 close to the protective platform 4 are sealed and fitted to the side wall of the protective platform 4 through the protective layer 16 to eliminate gaps at the connection.

[0034] A speed sensor can be installed on the traction unit 3 to ensure that the cable 8 is wound up and down synchronously with the movement of the traction unit 3.

[0035] As the traction unit 3 moves away from the detection element 26, i.e., when the cable 8 is released: the motor 31 drives the winding roller 32 to rotate in the opposite direction, releasing the cable 8 synchronously with the moving speed of the traction unit 3; the traction unit 3 pulls the cable clamp 9 pusher through the drag rope 17, and the support pad 25 keeps the protective shell 10 stationary due to static friction with the cable groove 5, while the inner pusher 12 drives the conical part 22 to move towards the conical groove 33, squeezing the rubber squeezing ball 24 out and clamping the cable 8, and the cable clamp 9 moves synchronously with the traction unit 3. At this time, the sealed link formed by the protective layer 16 prevents the intrusion of gravel and coal, and the detection element 26 monitors parameters such as insulation resistance and partial discharge of the cable 8 under load bending state in real time, and the data is synchronously uploaded to the monitoring terminal.

[0036] As the traction unit 3 moves closer to the detection element 26, i.e., when the cable 8 is being wound: the motor 31 drives the winding roller 32 to rotate forward, synchronously winding the cable 8 according to the moving speed of the traction unit 3; the cable clamp 9 moves towards the side wall of the protective platform 4, and the pushing block 13 of the last cable clamp 9 touches the side wall of the protective platform 4 first, driving the protective shell 10 to move in the opposite direction, the conical groove 33 releases the pressure on the extrusion ball 24, and the cable clamp 9 loosens; the pushing blocks 13 of adjacent cable clamps 9 sequentially trigger the movement of the preceding protective shell 10, realizing that all cable clamps 9 loosen in sequence, and the cable 8 is wound on the winding roller 32 without tension. During this process, the protective layer 16 remains sealed to prevent foreign matter from entering the cable clamp 9 during the winding process, and the sensor continuously monitors the status of the cable 8 to ensure that there are no hidden faults in the winding process.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations 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. In conclusion, if those skilled in the art, inspired by this description, design similar structural methods and embodiments without departing from the inventive spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A protective fixing structure for a coal mining machine cable, characterized in that: The device includes a workbench on which a scraper conveyor and a traction unit are mounted. The traction unit is movably engaged with the workbench and located at the upper end of the scraper conveyor. A protective platform and a cable trough are mounted on the side wall of the workbench. The cable trough is located between the protective platform and the workbench. A first adjustment component and a second adjustment component are respectively mounted at both ends of the protective platform. A cable is mounted on the traction unit. The cable movably passes around the first adjustment component and is wound around the second adjustment component. Multiple sets of cable clamps are mounted on the cable located between the first adjustment component and the traction unit. The lower end of each cable clamp is movably engaged with the cable trough. Adjacent sets of cable clamps are connected to each other. The cable clamp closest to the traction unit is connected to the side wall of the traction unit.

2. The protective fixing structure for coal mining machine cables according to claim 1, characterized in that: The cable clamp includes a protective shell, a pushing member, and a pushing block. The pushing member includes an outer pushing member and an inner pushing member, with a sliding cavity between the outer pushing member and the inner pushing member. One end of the protective shell is movably engaged in the sliding cavity, and the other end of the protective shell extends out of the sliding cavity. The side wall of the pushing member has a connecting groove, and multiple sets of connecting grooves are evenly spaced along the circumferential direction. The connecting grooves are connected to the sliding cavity. Multiple sets of pushing blocks are provided, and the pushing blocks are movably disposed through the connecting grooves. One end of the pushing block disposed in the connecting groove is connected to one end of the protective shell disposed in the sliding cavity, and the other end of the pushing block is disposed on the outside of the pushing member.

3. The protective fixing structure for coal mining machine cables according to claim 2, characterized in that: The cable clamp also includes a protective layer and a drag rope. One end of the protective layer and one end of the drag rope are both mounted on an external pusher. The drag rope is located at the lower end of the protective layer. The other end of the protective layer and the other end of the drag rope are movably connected to the external pusher on the adjacent cable clamp. A protective layer is connected between the cable clamp near the first adjustment component and the side wall of the protective platform.

4. The protective fixing structure for coal mining machine cables according to claim 3, characterized in that: The inner pusher has a first slot at its center, and the protective shell has a second slot at its center. The first slot and the second slot are concentric, and the diameter of the second slot is larger than the diameter of the first slot. The cable passes through the first slot. The inner sidewall of the protective shell has an annular groove, and the outer sidewall of the inner pusher is fitted with a retaining plate, which is movably engaged in the annular groove.

5. The protective fixing structure for coal mining machine cables according to claim 4, characterized in that: The inner pusher is connected to a tapered component at one end away from the card plate. The first slot is provided through the tapered component. The second slot is a tapered groove at one end away from the card plate, which matches the tapered component. The tapered component is movably disposed in the tapered groove. The side wall of the tapered component is evenly spaced with multiple extrusion grooves along the circumferential direction. The extrusion grooves are provided through the first and second slots. An extrusion ball is movably installed in the extrusion groove. The upper end of the extrusion ball is disposed in the tapered groove, and the lower end of the extrusion ball is movably engaged in the extrusion groove.

6. The protective fixing structure for coal mining machine cables according to claim 5, characterized in that: A support pad is installed at the bottom of the side wall of the protective shell, and the support pad is movably engaged in the cable trough.

7. The protective fixing structure for coal mining machine cables according to claim 6, characterized in that: The first adjustment component includes a detection element, which is installed inside one end of the protective platform. An arc-shaped connecting plate is installed on the upper end of the detection element. A cavity is provided between the connecting plate and the side wall of the detection element. A slot is provided on the side wall of the detection element to facilitate the movement of the cable. The slot is located in the cavity, and the cable is movably engaged in the slot. A first detection sensor is installed on the inner side wall of the connecting plate, and a second detection sensor is installed in the slot.

8. The protective fixing structure for coal mining machine cables according to claim 7, characterized in that: The second adjustment component includes a motor and a winding roller. The motor is mounted on the upper wall of the other end of the protective platform and is connected to a reducer. The winding roller is movably mounted inside the other end of the protective platform, and the reducer and the winding roller are connected by a coupling.

9. The protective fixing structure for coal mining machine cables according to claim 8, characterized in that: The extrusion ball is made of rubber.

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