An automatic synchronous cable dragging device applicable to extremely thin coal seams and its working method

Abstract

The present invention provides a fully automatic synchronous cable dragging device applicable to extremely thin coal seams and a working method thereof, belonging to the technical field of coal mining machinery and equipment. In the fully automatic synchronous cable dragging device applicable to extremely thin coal seams, a cable dragging power part is fixedly arranged at the head of a scraper conveyor, a cable dragging driven part is fixedly arranged at the tail of the scraper conveyor, the cable dragging power part and the cable dragging driven part are connected by a traction chain, and the cable dragging power part can drive the traction chain to move; the dragging device comprises a fixed support, an adjusting oil cylinder and a cable dragging drum. The fixed support is fixedly arranged on the traction chain, a cable clip connected with a shearer is wound around the cable dragging drum, the adjusting oil cylinder is fixedly arranged on the fixed support, an extending rod of the adjusting oil cylinder is fixedly connected with the cable dragging drum, and the cable dragging drum can move on the fixed support along the movement direction of the extending rod of the adjusting oil cylinder. The device adopts an automated following cable dragging form, which can not only be applicable to the narrow space of extremely thin coal seams, but also adapt to the speed of the shearer to achieve automatic synchronization.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mining machinery and equipment, and particularly relates to a full-automatic synchronous cable dragging device applicable to extremely thin coal seams and a working method thereof. Background Art

[0002] Coal, as the most important energy source in China, has been widely used in various fields. In recent years, with the continuous improvement of domestic manufacturing processes, mining methods, and supporting equipment, the automated mining equipment for extremely thin coal seams has also been developing rapidly. Extremely thin coal seams refer to coal seams with a thickness of less than 0.8 m in underground mining. They are widely distributed, have large reserves, and good coal quality in China. In some mining areas, the recoverable resources of medium-thick coal seams are becoming increasingly exhausted, and the mining of extremely thin coal seams has become the only way for the continuous production of mining areas. However, the continuous innovation of coal mining equipment has also brought new problems, namely the dragging problems of cables and water pipes, and such problems are more acute in working faces with strict space requirements such as extremely thin coal seams.

[0003] In traditional working faces of extremely thin coal seams, the dragging methods of cables and water pipes are manual dragging, and the cables and water pipes are fixed to the shearer by bundling. This dragging method is inefficient, and due to the small space in the working face of extremely thin coal seams, situations such as the cables being pulled too tightly or too loosely are likely to occur due to poor visibility, and even if they can be detected in time, they are not easy to handle. In severe cases, this situation may cause major power consumption accidents.

[0004] Nowadays, at home and abroad, many enterprises are researching and developing such cable dragging devices. The most important point of the cable dragging device is to achieve automatic synchronization of the cable dragging speed. Since the shearer always encounters various complex geological conditions such as gangue, jamming, and faults during the traction process, and such phenomena are particularly prominent in the working face of extremely thin coal seams, how to achieve automatic synchronization of cable dragging, how to utilize the limited structural space in the supporting of extremely thin coal seams, and how to comprehensively analyze the actual working conditions from multiple angles to achieve reliable cable dragging protection have become the key to the design of the cable dragging device.

[0005] In view of this, there is an urgent need for a cable dragging device that can not only be applicable to the narrow space of extremely thin coal seams but also adapt to the speed of the shearer to achieve automatic synchronization. Summary of the Invention

[0006] In view of this, to solve the problem of the urgent need for a cable dragging device that can not only be applicable to the narrow space of extremely thin coal seams but also adapt to the speed of the shearer to achieve automatic synchronization, the invention provides a full-automatic synchronous cable dragging device applicable to extremely thin coal seams and a working method thereof.

[0007] To achieve the above object, the invention adopts the following technical solutions:

[0008] A full-automatic synchronous cable dragging device applicable to extremely thin coal seams includes:

[0009] A driving device, the driving device comprising a towline power unit, a towline driven unit and a traction chain, the towline power unit is fixedly arranged at the head of the scraper, the towline driven unit is fixedly arranged at the tail of the scraper, the towline power unit and the towline driven unit are connected by the traction chain, and the towline power unit can drive the traction chain to move;

[0010] The towing device includes a fixed bracket, an adjusting cylinder and a towing cable drum. The fixed bracket is fixedly arranged on the towing chain. The cable clamp connected to the coal mining machine is wound around the towing cable drum. The adjusting cylinder is fixedly arranged on the fixed bracket. The extension rod of the adjusting cylinder is fixedly connected to the towing cable drum. The towing cable drum can move on the fixed bracket along the movement direction of the extension rod of the adjusting cylinder.

[0011] As a preferred solution of the above-mentioned fully automatic synchronous cable dragging device suitable for extremely thin coal seams, a displacement sensor is installed inside the adjusting cylinder, and the displacement sensor can detect the displacement of the extension rod of the adjusting cylinder.

[0012] As a preferred solution of the above-mentioned fully automatic synchronous cable towing device suitable for extremely thin coal seams, the towing cable driven part is a driven sprocket, and the towing cable power part includes a driving motor, a reducer and a driving sprocket, and the driving sprocket is connected to the driving motor through the reducer, and one end of the traction chain is sleeved on the driving sprocket, and the other end is sleeved on the driven sprocket.

[0013] As a preferred solution of the above-mentioned fully automatic synchronous cable towing device suitable for extremely thin coal seams, the fully automatic synchronous cable towing device suitable for extremely thin coal seams also includes an automatic information collection device, which can collect the rotation speed of the driving sprocket and the travel speed of the coal mining machine.

[0014] As a preferred solution of the above-mentioned fully automatic synchronous cable dragging device suitable for extremely thin coal seams, the automatic information collection device is arranged at the tail of the scraper.

[0015] As a preferred solution of the above-mentioned fully automatic synchronous cable towing device suitable for extremely thin coal seams, the towing device also includes a signal feedback box, which is fixedly arranged on the fixed bracket, and the displacement sensor and the automatic information acquisition device can be communicatively connected with the signal feedback box.

[0016] As a preferred solution of the above-mentioned fully automatic synchronous cable towing device suitable for extremely thin coal seams, the fully automatic synchronous cable towing device suitable for extremely thin coal seams also includes a control box, the signal feedback box is communicatively connected to the control box, and the control box can control the operating speed of the towing cable power unit.

[0017] The present invention also provides a working method for a fully automatic synchronous cable dragging device applicable to extremely thin coal seams, which is characterized in that the above-mentioned fully automatic synchronous cable dragging device applicable to extremely thin coal seams is adopted, including:

[0018] By controlling the running speed of the cable dragging power unit, the moving speed of the dragging device is matched with the traveling speed of the coal shearer;

[0019] By adjusting the oil cylinder, it is judged whether the moving speed of the dragging device is matched with the traveling speed of the coal shearer;

[0020] If the moving speed of the dragging device is not matched with the traveling speed of the coal shearer, then adjust the running speed of the cable dragging power unit and control the elongation of the adjusting oil cylinder so that the moving speed of the dragging device is matched with the traveling speed of the coal shearer.

[0021] As a preferred scheme of the working method of the above-mentioned fully automatic synchronous cable dragging device applicable to extremely thin coal seams, when the moving speed of the dragging device is matched with the traveling speed of the coal shearer, the coal shearer travels from the return airway to the transportation roadway, and the dragging device travels from the return airway to the middle position; when the coal shearer travels from the transportation roadway to the return airway, the driving device drives the dragging device to return from the middle position to the return airway, and the middle position is located in the middle of the return airway and the transportation roadway.

[0022] As a preferred scheme of the working method of the above-mentioned fully automatic synchronous cable dragging device applicable to extremely thin coal seams, judging whether the moving speed of the dragging device is matched with the traveling speed of the coal shearer by adjusting the oil cylinder specifically includes:

[0023] During the working process of the coal shearer, if the elongation of the extending rod of the adjusting oil cylinder remains unchanged, then the moving speed of the dragging device is matched with the traveling speed of the coal shearer; if the extending rod further extends or shortens after the elongation of the extending rod of the adjusting oil cylinder remains unchanged, then the moving speed of the dragging device is not matched with the traveling speed of the coal shearer.

[0024] Compared with the prior art, the beneficial effects of a fully automatic synchronous cable dragging device applicable to extremely thin coal seams and its working method provided by the present invention are:

[0025] 1. The present invention provides a fully automatic synchronous cable dragging device applicable to extremely thin coal seams and its working method. In the fully automatic synchronous cable dragging device applicable to extremely thin coal seams, a driving device can drive a dragging device to move. The cable clips are wound around a cable dragging drum and then connected to a shearer. Cables, water pipes and other objects to be dragged are all located inside the cable clips. The moving speed of the driving device driving the dragging device matches the speed of the shearer. The walking speed of the shearer is collected in real time, the speed of the dragging device matching it is calculated, and the driving device is controlled to drive the dragging device to move at this speed. When the shearer walks from the return airway to the transportation roadway, at this time, the dragging device should walk to half of the whole journey from the return airway to the coal wall of the working face, that is, the middle position. When the shearer walks from the transportation roadway to the return airway, at this time, the dragging device should walk back from half of the whole journey of the working face to the return airway, that is, complete a coal cutting cycle following the shearer. Thus, the dragging device initially synchronously follows the shearer.

[0026] 2. The present invention provides a fully automatic synchronous cable dragging device applicable to extremely thin coal seams and its working method. In the fully automatic synchronous cable dragging device applicable to extremely thin coal seams, considering adjustment factors such as elongation, deformation or loosening of the traction chain during work, an adjustment oil cylinder is also provided in the fully automatic synchronous cable dragging device applicable to extremely thin coal seams. The adjustment oil cylinder is fixedly arranged on a fixed support, and the extension rod of the adjustment oil cylinder is fixedly connected to the cable dragging drum. The cable dragging drum can move on the fixed support along the movement direction of the extension rod of the adjustment oil cylinder. When the dragging device is driven to work back and forth with the shearer on the working face, the cable dragging drum will be driven by the cable clips to move a certain distance on the fixed support. The extension rod of the adjustment oil cylinder is connected to the cable dragging drum, and the cable dragging drum will drive the extension rod of the adjustment oil cylinder to extend. After the speed of the dragging device matches the speed of the shearer, the elongation of the extension rod of the adjustment oil cylinder will remain unchanged. If the moving speed of the cable dragging drum does not match the walking speed of the shearer, the extension rod of the adjustment oil cylinder will further extend or shorten. The further amount of expansion and contraction of the extension rod of the adjustment oil cylinder can compensate for the displacement error of the cable dragging drum caused by the mismatch between the moving speed of the cable dragging drum and the walking speed of the shearer, that is, the real-time expansion and contraction amount of the extension rod of the adjustment oil cylinder can compensate for the displacement error of the cable dragging drum when the traction chain shows elongation, deformation or loosening. Then, according to the displacement amount of the extension rod, the speed of the cable dragging power unit is changed, so that the speed of the dragging device can match the speed of the shearer again, and the speed of the cable dragging drum can also match the speed of the shearer again. It can achieve fine adjustment on the basis of the initial synchronous condition, thus avoiding inaccurate automatic synchronization caused by the too long coal wall of the working face and the extensibility of cable clips, traction chains, etc., and solving the problem of fully automatic synchronization of the cable dragging device.

[0027] 3. The present invention provides a fully automatic synchronous cable dragging device applicable to extremely thin coal seams and its working method. In the fully automatic synchronous cable dragging device applicable to extremely thin coal seams, the cable dragging power part is fixedly arranged at the head of the scraper conveyor, and the cable dragging driven part is fixedly arranged at the tail of the scraper conveyor, so that the fully automatic synchronous cable dragging device applicable to extremely thin coal seams can be pushed forward together with the whole device when the scraper conveyor advances, and at the same time, it also leaves space for the fully automatic synchronous cable dragging device applicable to extremely thin coal seams to drag in the working face of extremely thin coal seams, and it can be applicable to the narrow space of extremely thin coal seam mining.

[0028] 4. The present invention provides a fully automatic synchronous cable dragging device applicable to extremely thin coal seams and its working method. The fully automatic synchronous cable dragging device applicable to extremely thin coal seams adopts an automated following cable dragging form to replace the traditional manual dragging method, which not only improves the working efficiency of underground cable dragging, enhances the working efficiency of the shearer, but also reduces the risk of cable dragging accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0030] Figure 1 is a schematic diagram of the fully automatic synchronous cable dragging device applicable to extremely thin coal seams provided by a specific embodiment of the present invention and the scraper conveyor working at the coal wall of the working face;

[0031] Figure 2 is a schematic structural diagram of the fully automatic synchronous cable dragging device applicable to extremely thin coal seams provided by a specific embodiment of the present invention.

[0032] In the drawings:

[0033] 1. Head of the scraper conveyor; 2. Tail of the scraper conveyor; 3. Shearer; 4. Cable dragging power part; 5. Cable dragging driven part; 6. Dragging device; 7. Transportation roadway; 8. Return airway; 9. Coal wall of the working face; 10. Hydraulic support and operation side; 61. Fixed support; 62. Cable dragging reel; 63. Adjusting oil cylinder; 64. Signal feedback box. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0035] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0037] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] See Figure 1-2 To illustrate this embodiment, the present invention provides a fully automatic synchronous cable dragging device applicable to extremely thin coal seams and its working method. The fully automatic synchronous cable dragging device applicable to extremely thin coal seams includes a driving device and a dragging device 6. The driving device includes a cable dragging power part 4, a cable dragging driven part 5, and a traction chain. The cable dragging power part 4 is fixedly arranged at the head of the scraper conveyor 1, the cable dragging driven part 5 is fixedly arranged at the tail of the scraper conveyor 2, the cable dragging power part 4 and the cable dragging driven part 5 are connected by the traction chain, and the cable dragging power part 4 can drive the traction chain to move; the dragging device 6 includes a fixed bracket 61, an adjusting oil cylinder 63, and a cable dragging drum 62. The fixed bracket 61 is fixedly arranged on the traction chain, the cable clamp connected to the shearer 3 is wound around the cable dragging drum 62, the adjusting oil cylinder 63 is fixedly arranged on the fixed bracket 61, the extending rod of the adjusting oil cylinder 63 is fixedly connected to the cable dragging drum 62, and the cable dragging drum 62 can move on the fixed bracket 61 along the movement direction of the extending rod of the adjusting oil cylinder 63.

[0039] In the fully automatic synchronous cable dragging device applicable to extremely thin coal seams, the driving device can drive the dragging device 6 to move. The cable clamp is wound around the cable dragging drum 62 and then connected to the shearer 3. The objects to be dragged such as cables and water pipes are all located inside the cable clamp. The moving speed of the driving device driving the dragging device 6 is matched with the walking speed of the shearer 3. The walking speed of the shearer 3 is collected in real time, the moving speed of the dragging device 6 matching it is calculated, and the driving device is controlled to drive the dragging device 6 to move at this moving speed. When the shearer 3 walks from the return airway 8 to the transportation roadway 7, at this time the dragging device 6 should reach half of the whole journey of the working face coal wall 9, that is, the middle position. And when the shearer 3 walks from the transportation roadway 7 to the return airway 8, at this time the dragging device 6 should walk back from half of the whole journey of the working face coal wall 9 to the return airway 8, that is, complete a coal cutting cycle following the shearer 3. Thus, the dragging device 6 is initially synchronized with the shearer 3. It can be understood that the middle position is the middle position of the whole journey of the working face coal wall 9, that is, the middle position between the return airway 8 and the transportation roadway 7.

[0040] Considering the adjustment factors such as elongation, deformation or loosening of the traction chain during operation, these adjustment factors will cause errors in the displacement of the cable drum 62, resulting in a mismatch between the movement speed of the cable drum 62 and the traveling speed of the shearer 3. Therefore, an adjustment cylinder 63 is also provided in the fully automatic synchronous cable dragging device applicable to extremely thin coal seams. The real-time expansion and contraction amount of the extending rod of the adjustment cylinder 63 can compensate for the displacement error of the cable drum 62, and at the same time, whether there is a mismatch between the movement speed of the cable drum 62 and the traveling speed of the shearer 3 can also be judged by the expansion and contraction amount of the extending rod of the adjustment cylinder 63. The adjustment cylinder 63 is fixedly arranged on the fixed bracket 61, and the extending rod of the adjustment cylinder 63 is fixedly connected to the cable drum 62. The cable drum 62 can move on the fixed bracket 61 along the movement direction of the extending rod of the adjustment cylinder 63. When the dragging device 6 is driven to work back and forth following the shearer 3, the cable drum 62 will be driven by the cable clamp to move a certain distance on the fixed bracket 61. The extending rod of the adjustment cylinder 63 is connected to the cable drum 62, and the cable drum 62 will drive the extending rod of the adjustment cylinder 63 to extend. After the speed of the dragging device 6 matches the speed of the shearer 3, the elongation amount of the extending rod of the adjustment cylinder 63 will remain unchanged. If there is a mismatch between the movement speed of the cable drum 62 and the traveling speed of the shearer 3, the extending rod of the adjustment cylinder 63 will further extend or contract. At this time, the further expansion and contraction amount of the extending rod of the adjustment cylinder 63 compensates for the displacement error of the cable drum 62 caused by the mismatch between the movement speed of the cable drum 62 and the traveling speed of the shearer 3, that is, the real-time expansion and contraction amount of the extending rod of the adjustment cylinder 63 can compensate for the displacement error of the cable drum 62 when the traction chain extends, deforms or loosens. Then, by changing the speed of the cable dragging power unit 4 according to the displacement amount of the extending rod, the speed of the dragging device 6 can be made to match the speed of the shearer 3 again, and the speed of the cable drum 62 can also be made to match the speed of the shearer 3 again, which can achieve fine adjustment on the basis of the preliminary synchronization condition, thus avoiding inaccurate automatic synchronization caused by the excessive length of the coal wall 9 in the working face and the ductility of the cable clamp, traction chain, etc., and solving the problem of full-automatic synchronization of the cable dragging device.

[0041] For example, when the traction chain becomes loose, the movement speed of the dragging device 6 will become slower than expected, and the speed of the cable drum 62 in the dragging device 6 will also become slower accordingly, while the speed of the shearer 3 remains unchanged. The cable clamp connected between the shearer 3 and the cable drum 62 will drive the cable drum 62 to move on the fixed bracket 61 in the direction close to the shearer 3. The cable drum 62 will drive the extending rod of the adjustment cylinder 63 to further expand and contract. The expansion and contraction amount of the extending rod of the adjustment cylinder 63 compensates for the displacement error of the cable drum 62 caused by the loosening of the traction chain. Then, by changing the speed of the cable dragging power unit 4 according to the displacement amount of the extending rod of the adjustment cylinder 63, that is, by increasing the speed of the cable dragging power unit 4, the speed of the dragging device 6 can be made to match the speed of the shearer 3 again.

[0042] Moreover, the towline power unit 4 is fixedly arranged on the scraper head 1, and the towline driven unit 5 is fixedly arranged on the scraper tail 2, so that the fully automatic synchronous towline device suitable for extremely thin coal seams can push the entire device forward when the scraper moves forward. At the same time, it also leaves space for the fully automatic synchronous towline device suitable for extremely thin coal seams to drag the coal wall 9 on the working face of the extremely thin coal seam, which can be used in the narrow space of extremely thin coal seam mining.

[0043] This fully automatic synchronous cable towing device, which is suitable for extremely thin coal seams, adopts an automated following cable towing method to replace the traditional manual towing method. It is suitable for the narrow space of extremely thin coal seams and can adapt to the walking speed of the coal mining machine 3. It not only improves the working efficiency of the underground cable towing and the working efficiency of the coal mining machine 3, but also reduces the risk of cable towing accidents.

[0044] It is understandable that the fixed bracket 61 can move with the adjusting cylinder 63 and the towing cable drum 62 along with the towing chain.

[0045] In this embodiment, the coal mining machine 3 and the towing device 6 need to be located on one side of the cable clamp during installation. The towing device 6 is fixed to the traction chain through a pin shaft, the towing cable power unit 4 is fixed to the scraper head 1 by bolts, and the towing cable driven unit 5 is fixed to the scraper tail 2 by bolts.

[0046] In this embodiment, a slideway is provided on the fixed bracket 61 , a slider is slidably disposed in the slideway, and the towing cable drum 62 is fixedly disposed on the slider, so that the towing cable drum 62 is slidably disposed on the fixed bracket 61 .

[0047] Optionally, a displacement sensor is installed inside the regulating oil cylinder 63, and the displacement sensor can detect the displacement of the extension rod. At this time, the change amount of the extension rod of the regulating oil cylinder 63 will be detected by the displacement sensor.

[0048] Optionally, the towing cable driven part 5 is a driven sprocket, and the towing cable power part 4 includes a driving motor, a reducer and a driving sprocket, the driving sprocket is connected to the driving motor through the reducer, one end of the traction chain is sleeved on the driving sprocket, and the other end is sleeved on the driven sprocket. The driving motor drives the driving sprocket to rotate through the reducer, and the driving sprocket and the driven sprocket can drive the traction chain to move.

[0049] Optionally, the fully automatic synchronous cable dragging device suitable for extremely thin coal seams further comprises an automatic information collection device, which can collect the rotation speed of the driving sprocket and the travel speed of the coal mining machine 3. In this embodiment, the automatic information collection device uses an encoder.

[0050] Optionally, the automatic information acquisition device is arranged at the tail 2 of the scraper conveyor. The driven sprocket is arranged at the tail 2 of the scraper conveyor. The driven sprocket occupies a small space, and there is extra space at the tail 2 of the scraper conveyor to install the automatic information acquisition device.

[0051] Optionally, the dragging device 6 further includes a signal feedback box 64. The signal feedback box 64 is fixedly arranged on the fixed bracket 61. Both the displacement sensor and the automatic information acquisition device can be communicatively connected to the signal feedback box 64. After the automatic information acquisition device collects information such as the rotational speed of the driving sprocket, the traveling speed of the shearer 3, and the motor load, it feeds back to the signal feedback box 64. After the displacement sensor detects the displacement of the extending rod of the adjusting oil cylinder 63, it feeds back to the signal feedback box 64. After comprehensively considering information such as the rotational speed of the driving sprocket, the traveling speed of the shearer 3, the displacement of the extending rod of the adjusting oil cylinder 63, and the motor load in the signal feedback box 64, the speed of the dragging device 6 matching the speed of the shearer 3 is calculated, and then the rotational speed of the driving sprocket and the rotational speed of the driving motor are calculated.

[0052] Optionally, the fully automatic synchronous cable dragging device applicable to extremely thin coal seams further includes a control box. The signal feedback box 64 is communicatively connected to the control box, and the control box can control the operating speed of the cable dragging power unit 4. The signal feedback box 64 transmits the rotational speed of the driving motor to the control box, and the control box controls the driving motor to rotate. Preferably, the displacement sensor and the automatic information acquisition device can be connected to the signal feedback box 64 by wires or wirelessly; the signal feedback box 64 can also be connected to the control box by wires or wirelessly.

[0053] The present invention also provides a working method of a fully automatic synchronous cable dragging device applicable to extremely thin coal seams, using the above-mentioned fully automatic synchronous cable dragging device applicable to extremely thin coal seams, including:

[0054] By controlling the operating speed of the cable dragging power unit 4, the moving speed of the dragging device 6 is matched with the traveling speed of the shearer 3.

[0055] The traveling speed of the shearer 3 is real-time collected by the automatic information acquisition device, fed back to the signal feedback box 64, the speed of the dragging device 6 matching the speed of the shearer 3 is calculated and transmitted to the control box. The control box controls the rotational speed of the driving motor, so that the speed of the driving device driving the dragging device 6 to move is matched with the speed of the shearer 3, thereby realizing that the dragging device 6 initially synchronously follows the shearer 3. When the moving speed of the dragging device 6 is matched with the traveling speed of the shearer 3, the shearer 3 travels from the return airway 8 to the transportation roadway 7, and the dragging device 6 travels from the return airway 8 to the middle position; the shearer 3 travels from the transportation roadway 7 to the return airway 8, and the driving device drives the dragging device 6 to return from the middle position to the return airway 8, that is, to complete a coal cutting cycle following the shearer 3. The middle position is located in the middle of the return airway 8 and the transportation roadway 7, that is, half of the whole process of the working face coal wall 9.

[0056] By adjusting the oil cylinder 63, it is judged whether the moving speed of the dragging device 6 matches the traveling speed of the shearer 3; if the moving speed of the dragging device 6 does not match the traveling speed of the shearer 3, the operating speed of the cable dragging power unit 4 is adjusted to make the moving speed of the dragging device 6 match the traveling speed of the shearer 3.

[0057] Specifically, during the operation of the shearer 3, if the elongation of the extending rod of the adjusting oil cylinder 63 remains unchanged, the moving speed of the dragging device 6 matches the traveling speed of the shearer 3; if the extending rod further extends or shortens after the elongation of the extending rod of the adjusting oil cylinder 63 remains unchanged, the moving speed of the dragging device 6 does not match the traveling speed of the shearer 3.

[0058] The displacement sensor detects the displacement of the extending rod of the adjusting oil cylinder 63 and feeds it back to the signal feedback box 64. If the extending rod further extends or shortens after the elongation of the extending rod of the adjusting oil cylinder 63 remains unchanged, after the signal feedback box 64 synthesizes information such as the displacement of the extending rod of the adjusting oil cylinder 63, the traveling speed of the shearer 3, and the rotational speed of the driving sprocket, it calculates the rotational speed of the driving sprocket and the rotational speed of the driving motor when the moving speed of the dragging device 6 matches the traveling speed of the shearer 3, and transmits them to the control box. The control box controls the rotational speed of the driving motor, so as to make the speed of the driving device driving the dragging device 6 match the speed of the shearer 3 again, optimize the automatic synchronization following of the dragging device 6 with the shearer 3, and greatly improve the accuracy and reliability of the automatic synchronization following.

[0059] Obviously, the embodiments of the present invention disclosed above are only used to help explain the present invention. The embodiments do not describe all the details in detail, nor limit the invention to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A working method of a fully automatic synchronous cable towing device suitable for extremely thin coal seams, characterized in that: A fully automatic synchronous cable towing device suitable for extremely thin coal seams is used, and the working method of the fully automatic synchronous cable towing device suitable for extremely thin coal seams includes: By controlling the running speed of the towing cable power unit (4), the moving speed of the towing device (6) is matched with the traveling speed of the coal mining machine (3); By adjusting the oil cylinder (63), it is determined whether the moving speed of the dragging device (6) matches the traveling speed of the coal mining machine (3); If the moving speed of the towing device (6) does not match the traveling speed of the coal mining machine (3), the running speed of the towing cable power unit (4) is adjusted to make the moving speed of the towing device (6) match the traveling speed of the coal mining machine (3); By adjusting the oil cylinder (63), determining whether the moving speed of the dragging device (6) matches the traveling speed of the coal mining machine (3) specifically includes: During the operation of the coal mining machine (3), if the extension amount of the extension rod of the regulating oil cylinder (63) remains unchanged, the movement speed of the towing device (6) matches the travel speed of the coal mining machine (3); if the extension amount of the extension rod of the regulating oil cylinder (63) remains unchanged and then the extension rod further extends or shortens, the movement speed of the towing device (6) does not match the travel speed of the coal mining machine (3); When the movement speed of the dragging device (6) matches the travel speed of the coal mining machine (3), the coal mining machine (3) travels from the return air lane (8) to the transport lane (7), and the dragging device (6) travels from the return air lane (8) to the middle position; when the coal mining machine (3) travels from the transport lane (7) to the return air lane (8), the driving device drives the dragging device (6) from the middle position back to the return air lane (8), and the middle position is located between the return air lane (8) and the transport lane (7); The fully automatic synchronous cable dragging device suitable for extremely thin coal seams comprises: A driving device, the driving device comprising a towing cable power unit (4), a towing cable driven unit (5) and a traction chain, the towing cable power unit (4) being fixedly arranged on the head of the scraper (1), the towing cable driven unit (5) being fixedly arranged on the tail of the scraper (2), the towing cable power unit (4) and the towing cable driven unit (5) being connected via the traction chain, and the towing cable power unit (4) being able to drive the traction chain to move; A towing device (6), the towing device (6) comprising a fixed bracket (61), an adjusting cylinder (63) and a towing cable drum (62), the fixed bracket (61) being fixedly arranged on the towing chain, a cable clamp connected to the coal mining machine (3) being wound around the towing cable drum (62), the adjusting cylinder (63) being fixedly arranged on the fixed bracket (61), an extension rod of the adjusting cylinder (63) being fixedly connected to the towing cable drum (62), the towing cable drum (62) being able to move on the fixed bracket (61) along the movement direction of the extension rod of the adjusting cylinder (63); the cable clamp being able to drive the towing cable drum (62) to move on the fixed bracket (61), and the towing cable drum (62) being able to drive the extension rod of the adjusting cylinder (63) to extend and retract.

2. The working method of the fully automatic synchronous cable towing device applicable to extremely thin coal seams according to claim 1 is characterized in that: A displacement sensor is installed inside the regulating oil cylinder (63), and the displacement sensor can detect the displacement of the extension rod of the regulating oil cylinder (63).

3. The working method of the fully automatic synchronous cable towing device applicable to extremely thin coal seams according to claim 2 is characterized in that: The tow cable driven part (5) is a driven sprocket, the tow cable power part (4) comprises a driving motor, a reducer and a driving sprocket, the driving sprocket is connected to the driving motor through the reducer, one end of the traction chain is sleeved on the driving sprocket, and the other end is sleeved on the driven sprocket.

4. The working method of the fully automatic synchronous cable towing device applicable to extremely thin coal seams according to claim 3 is characterized in that: The fully automatic synchronous cable dragging device suitable for extremely thin coal seams also includes an automatic information collection device, which can collect the rotation speed of the active sprocket and the travel speed of the coal mining machine (3).

5. The working method of the fully automatic synchronous cable towing device applicable to extremely thin coal seams according to claim 4 is characterized in that: The automated information collection device is arranged at the tail end (2) of the scraper conveyor.

6. The working method of the fully automatic synchronous cable towing device applicable to extremely thin coal seams according to claim 4 is characterized in that: The dragging device (6) further comprises a signal feedback box (64), wherein the signal feedback box (64) is fixedly arranged on the fixed bracket (61), and the displacement sensor and the automatic information collection device can both be communicatively connected with the signal feedback box (64).

7. The working method of the fully automatic synchronous cable towing device applicable to extremely thin coal seams according to claim 6 is characterized in that: The fully automatic synchronous cable towing device suitable for extremely thin coal seams also includes a control box, the signal feedback box (64) is communicatively connected to the control box, and the control box can control the operating speed of the cable towing power unit (4).

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