Cable protection device of underground coal mining machine

Abstract

The utility model relates to the technical field of cable protection, and discloses a cable protection device of an underground coal mining machine, which comprises an L-shaped frame and a straight plate frame, extension plates are fixedly mounted at the lower ends of the L-shaped frame and the straight plate frame, chutes are formed in the extension plates, sliding blocks are slidably mounted in the chutes through buffer components, and guide wheels are rotatably mounted between the sliding blocks; a screw is rotatably mounted at the top of the L-shaped frame, the screw is vertically arranged, and a transmission part used for rotating the screw is mounted on the side wall of the L-shaped frame; the top of the side wall of the straight plate frame is provided with a connecting part used for being connected with the L-shaped frame. A monitoring part used for monitoring a cable is installed in the middle of the side wall of the straight plate frame. When a cable is pulled and pulled, the buffer component can adaptively adjust the positions of the slide block and the guide wheel, so that the pulling impact force is prevented from being concentrated; the workload of inspectors can be reduced through the monitoring component, and the monitoring effect is ensured; the operation position during installation can be changed through the transmission part, and operation is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of cable protection technology, specifically to a cable protection device for underground coal mining machines. Background Technology

[0002] The underground coal mining machine is driven by an electric motor to rotate the cutting drum. The hard alloy cutting teeth installed on the surface of the drum are used to break the coal seam by impact and shearing. During the operation of the underground coal mining machine, the cable is a key component to ensure the normal operation of the equipment.

[0003] Cables operate in complex environments (exposed to coal dust, water vapor, mechanical compression, and electromagnetic interference, etc.), and damage to them will directly affect production safety. Therefore, protective measures must be taken to improve their performance. Currently, cable hooks (hooks with guide wheels) are commonly used to suspend cables to prevent them from crossing air ducts or water pipes. The suspension spacing is ≤1.5 meters to ensure that the cables hang naturally.

[0004] However, the cable hook has a simple structure and single function. After the underground coal mining machine moves, the cable needs to be dragged. It does not have a buffer function, which can easily concentrate the tensile impact force on the cable and cause it to break. It does not have an online monitoring function, and the monitoring of each section of the cable still requires manual inspection, resulting in poor monitoring effect. Moreover, the installation method is achieved by screwing on the top screw. The operating space of the knob is small and the operation is not convenient.

[0005] Therefore, in order to solve the above problems, a cable protection device for underground coal mining machines is proposed. Utility Model Content

[0006] The purpose of this utility model is to provide a cable protection device for underground coal mining machines, which has the functions of buffering, online monitoring and easy loading and unloading, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a cable protection device for an underground coal mining machine, comprising an L-shaped frame and a straight plate frame. An extension plate is fixedly installed at the lower end of both the L-shaped frame and the straight plate frame. Each extension plate has a chute. A slider is slidably installed inside the chute via a buffer component. Guide wheels are rotatably installed between the sliders. A screw is rotatably installed on the top of the L-shaped frame, and the screw is vertically positioned. A transmission component for rotating the screw is installed on the side wall of the L-shaped frame. A connecting component for connecting the L-shaped frame is installed on the top of the side wall of the straight plate frame. A monitoring component for monitoring the cable is installed in the middle of the side wall of the straight plate frame.

[0008] Specifically, the chute is a downwardly curved concave arc shape, and the slider is a fan-shaped block that matches the internal shape of the chute.

[0009] Specifically, the buffer component includes a spring and an arc-shaped guide rod. The arc-shaped guide rod is fixedly installed inside the chute. The slider has a through hole for the arc-shaped guide rod to pass through. Each arc-shaped guide rod is fitted with two springs. The two springs are distributed on both sides of the slider. The two ends of the springs are fixedly assembled to the side wall of the slider and the end of the chute, respectively.

[0010] Specifically, the monitoring component includes a housing and a battery, circuit board, and wireless signal transmitter electrically connected inside the housing. A sensor group is installed through the side wall of the housing. The sensor group is electrically connected to the circuit board. The housing is fixedly assembled with a straight plate frame. The straight plate frame has a through hole for the sensor group to pass through.

[0011] Specifically, rollers are rotatably mounted on the side walls of the L-shaped frame and the straight plate frame that are close to each other. The rollers are vertically arranged and located above the guide wheels.

[0012] Furthermore, the number of rollers on each side is 2 to 4, evenly distributed from front to back.

[0013] Specifically, the transmission component includes a universal joint, a transmission rod, and a butterfly knob. The transmission rod is rotatably mounted on the side wall of the L-shaped frame. The transmission rod is inclined. The upper end of the transmission rod is connected to the lower end of a screw via a universal joint. The lower end of the transmission rod is fixedly mounted with a butterfly knob.

[0014] Specifically, the connecting components include hooks and buckles. Buckles are fixedly installed on the side wall of the straight frame, and hooks are fixedly installed on the right end of the L-shaped frame. The hooks and buckles are connected and assembled.

[0015] Furthermore, the upper end of the straight plate frame has an arc-shaped top structure, and an arc-shaped groove is provided on the side of the arc-shaped top structure near the guide wheel. The right end of the L-shaped frame has a protrusion that matches the arc-shaped groove.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] It has the function of resisting tensile impact: when the cable is pulled, the buffer component can adaptively adjust the position of the slider and guide wheel to avoid the concentration of pulling impact force. When the impact force disappears, the slider and guide wheel can gradually return to the center and restore the impact resistance.

[0018] Online detection function: The monitoring components can send temperature signals and partial discharge signals from the cable to the main unit of the coal mining machine, reducing the workload of the inspectors and ensuring the monitoring effect.

[0019] Easy to install and remove: The operating position during installation can be changed through the transmission components, making operation more convenient. Attached Figure Description

[0020] Figure 1 This is a schematic front view of the structure of this utility model;

[0021] Figure 2 The right view is a schematic diagram of the structure of this utility model;

[0022] Figure 3 This is a schematic cross-sectional view of the monitoring component of this utility model;

[0023] Figure 4 for Figure 1 Enlarged view of the structure at point a.

[0024] In the diagram: 1. L-shaped frame, 2. Connecting component, 21. Hook, 22. Buckle, 3. Straight plate frame, 4. Monitoring component, 41. Sensor group, 42. Housing, 43. Circuit board, 44. Battery, 45. Wireless signal transmitter, 5. Buffer component, 51. Spring, 52. Arc-shaped light rod, 6. Guide wheel, 7. Extension plate, 8. Roller, 9. Transmission component, 91. Universal joint, 92. Transmission rod, 93. Butterfly knob, 10. Screw, 11. Slider, 12. Chute, 13. Protrusion. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 and Figure 2 This utility model provides a technical solution: a cable protection device for an underground coal mining machine, including an L-shaped frame 1 and a straight plate frame 3. The L-shaped frame 1 and the straight plate frame 3 constitute the main support body. An extension plate 7 is fixedly installed at the lower end of both the L-shaped frame 1 and the straight plate frame 3. The extension plate 7 is horizontally arranged and each extension plate 7 has a chute 12. A slider 11 is slidably installed inside the chute 12 through a buffer component 5. A guide wheel 6 is rotatably installed between the sliders 11. The guide wheel 6 is used to roll and support the cable. The slider 11 can move the guide wheel 6 back and forth along the chute 12. The buffer component 5 enables the slider 11 to adaptively adjust its position and has the ability to center and reset, so as to buffer the concentrated pulling impact force on the cable caused by pulling.

[0027] A screw 10 is rotatably mounted on the top of the L-shaped frame 1. The screw 10 is vertically positioned. A transmission component 9 for rotating the screw 10 is mounted on the side wall of the L-shaped frame 1. The screw 10 can be operated from the side of the device through the transmission component 9 to complete the operation of screwing, installing and disassembling the device. The operation space is large and the operation is convenient, without the need to carry additional tools.

[0028] The top of the side wall of the straight frame 3 is equipped with a connecting component 2 for connecting the L-shaped frame 1. The connecting component 2 can connect the L-shaped frame 1 and the straight frame 3 into a whole to ensure the overall strength. In addition, the connecting component 2 can also separate the L-shaped frame 1 and the straight frame 3, which makes it convenient to put the cable into the guide wheel 6 or take the cable out of the guide wheel 6.

[0029] A monitoring component 4 for monitoring cables is installed in the middle of the side wall of the straight plate frame 3. The monitoring component 4 can collect information about the cables here to achieve the purpose of online monitoring.

[0030] Specifically:

[0031] The chute 12 is a downward-curved concave arc shape, and the slider 11 is a fan-shaped block that matches the internal shape of the chute 12. The fan-shaped slider 11 can slide more smoothly in the chute 12. At the same time, because the chute 12 is a downward-curved concave arc shape, under the weight of the guide wheel 6 and the slider 11, the shape of the chute 12 makes it easier for the guide wheel 6 and the slider 11 to achieve centering and resetting.

[0032] The buffer component 5 includes a spring 51 and an arc-shaped guide rod 52. The arc-shaped guide rod 52 is fixedly installed inside the chute 12. The arc-shaped guide rod 52 is adapted to the shape of the chute 12. The slider 11 has a through hole for passing through the arc-shaped guide rod 52. The slider 11 can slide better along the chute 12 along the arc-shaped guide rod 52 to improve the smoothness of sliding. Each arc-shaped guide rod 52 is fitted with two springs 51. The two springs 51 are distributed on both sides of the slider 11. The two ends of the springs 51 are fixedly assembled to the side wall of the slider 11 and the end of the chute 12, respectively. Each pair of springs 51 is identical. Together with the weight of the guide wheel 6 and the slider 11, they enable the guide wheel 6 and the slider 11 to have better centering and resetting ability due to the force of the springs 51.

[0033] Please see Figure 3The monitoring component 4 includes a housing 42 and an internally connected battery 44, circuit board 43, and wireless signal transmitter 45. The circuit board 43 is an existing component with key components such as a microprocessor, memory, and interface circuits. A sensor group 41 is installed through the side wall of the housing 42. The sensor group 41 is electrically connected to the circuit board 43 through a standardized interface. The housing 42 is fixedly assembled with the straight plate frame 3 by bolts. The straight plate frame 3 has a through hole for the sensor group 41 to pass through. The acquisition end of the sensor group 41 can pass through the through hole and face the installed cable. The sensor group 41 mainly includes a temperature sensor (used to monitor the temperature of the cable, especially at the joint) and a high-frequency current sensor (to monitor partial discharge signals to detect insulation defects in advance). The collected information is processed by the circuit board 43 and sent to the signal receiver on the main unit of the coal mining machine through the wireless signal transmitter 45. The main unit of the coal mining machine (including the main controller, display, signal receiver, etc.) analyzes and processes the information to obtain a real-time status assessment report of the cable at each location, so as to realize the monitoring of the cable operation status.

[0034] Rollers 8 are rotatably mounted on the side walls of the L-shaped frame 1 and the straight frame 3, which are close to each other. The rollers 8 are vertically arranged and located above the guide wheel 6. The rollers 8 support the cable by rolling, so as to avoid damage to the cable sheath caused by contact or scraping between the cable and the L-shaped frame 1 and the straight frame 3. The number of rollers 8 on each side is 2 to 4 evenly distributed from front to back to ensure comprehensive support. In addition, the sensor group 41 extends between the rollers 8, which can also prevent the cable from contacting the acquisition end of the sensor group 41.

[0035] The transmission component 9 includes a universal joint 91, a transmission rod 92, and a butterfly knob 93. The transmission rod 92 is rotatably mounted on the side wall of the L-shaped frame 1. The transmission rod 92 is inclined. The upper end of the transmission rod 92 is connected to the lower end of the screw 10 through the universal joint 91. The lower end of the transmission rod 92 is fixedly mounted with the butterfly knob 93. By turning the butterfly knob 93, the screw 10 can be rotated after being transmitted through the transmission rod 92 and the universal joint 91, so as to change the direction of power input, making it easier for the operator to operate in a wider area and improving the convenience of connecting, installing, and disassembling the screw 10.

[0036] Please see Figure 4 The connecting component 2 includes a hook 21 and a buckle 22. The buckle 22 is fixedly installed on the side wall of the straight frame 3, and the hook 21 is fixedly installed on the right end of the L-shaped frame 1. By attaching the hook 21 and the buckle 22, the L-shaped frame 1 and the straight frame 3 can be connected or separated.

[0037] The upper end of the straight frame 3 is an arc-shaped top structure. An arc-shaped groove is provided on the side of the arc-shaped top structure near the guide wheel 6. The right end of the L-shaped frame 1 is provided with a protrusion 13 that matches the arc-shaped groove. When the L-shaped frame 1 and the straight frame 3 are aligned, the arc-shaped groove and the protrusion 13 engage to improve the strength of the L-shaped frame 1 and the straight frame 3 after connection.

[0038] The working principle of this embodiment:

[0039] This device is installed in conjunction with the working progress of the underground coal mining machine.

[0040] After disassembling the hook 21 and the latch 22, the straight plate frame 3 and the slider 11 can swing downwards around the pivot of the guide wheel 6, exposing one side of the guide wheel 6, making it convenient to place the cable on the guide wheel 6. Then, it swings upwards and resets the straight plate frame 3, aligning the right end of the straight plate frame 3 with the L-shaped frame 1. The arc-shaped groove engages with the protrusion 13. The hook 21 and the latch 22 are then re-fastened to complete the placement of the cable.

[0041] By turning the butterfly knob 93, the screw 10 can be rotated through the transmission rod 92 and universal joint 91, and the screw 10 can be connected and assembled with the screw hole reserved on the top plate of the well, thereby fixing the whole device and completing the hoisting of the cable. Each cable is suspended separately to avoid tangling.

[0042] When the cable is pulled, the buffer component 5 can adaptively adjust the position of the slider 11 and the guide wheel 6 to avoid the concentration of the pulling impact force. When the impact force disappears, the slider 11 and the guide wheel 6 can gradually return to the center and restore the impact resistance.

[0043] When the cable is in use, this device has the ability to monitor it online. Through the monitoring component 4, the temperature signal and partial discharge signal on the cable can be sent to the main unit of the coal mining machine and displayed to the staff, so as to improve the safety of cable use.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cable protection device for an underground coal mining machine, characterized in that: The L-shaped frame (1) and the straight plate frame (3) are included. The lower ends of the L-shaped frame (1) and the straight plate frame (3) are fixedly installed with extension plates (7). The extension plates (7) are provided with chutes (12). The inside of the chutes (12) is slidably installed with sliders (11) through buffer components (5). Guide wheels (6) are rotatably installed between the sliders (11). A screw (10) is rotatably mounted on the top of the L-shaped frame (1), the screw (10) is vertically set, and a transmission component (9) for rotating the screw (10) is installed on the side wall of the L-shaped frame (1). The top of the side wall of the straight plate frame (3) is equipped with a connecting component (2) for connecting the L-shaped frame (1); The straight plate frame (3) has a monitoring component (4) for monitoring cables installed in the middle of its side wall.

2. The cable protection device for an underground coal mining machine according to claim 1, characterized in that: The chute (12) is a downwardly curved concave arc shape, and the slider (11) is a fan-shaped block that matches the internal shape of the chute (12).

3. The cable protection device for an underground coal mining machine according to claim 2, characterized in that: The buffer component (5) includes a spring (51) and an arc-shaped light rod (52). The arc-shaped light rod (52) is fixedly installed inside the chute (12). The slider (11) has a through hole for passing through the arc-shaped light rod (52). Each arc-shaped light rod (52) is fitted with two springs (51). The two springs (51) are distributed on both sides of the slider (11). The two ends of the springs (51) are fixedly assembled with the side wall of the slider (11) and the end of the chute (12), respectively.

4. The cable protection device for an underground coal mining machine according to claim 1, characterized in that: The monitoring component (4) includes a housing (42) and a battery (44), a circuit board (43), and a wireless signal transmitter (45) electrically connected inside the housing (42). A sensor group (41) is installed through the side wall of the housing (42). The sensor group (41) is electrically connected to the circuit board (43). The housing (42) is fixedly assembled with a straight plate frame (3). The straight plate frame (3) has a through hole for the sensor group (41) to pass through.

5. The cable protection device for an underground coal mining machine according to claim 1, characterized in that: Rollers (8) are rotatably installed on the side walls of the L-shaped frame (1) and the straight plate frame (3) that are close to each other. The rollers (8) are vertically arranged and located above the guide wheel (6).

6. The cable protection device for an underground coal mining machine according to claim 5, characterized in that: The number of rollers (8) on each side is 2 to 4, evenly distributed from front to back.

7. The cable protection device for an underground coal mining machine according to claim 1, characterized in that: The transmission component (9) includes a universal joint (91), a transmission rod (92), and a butterfly knob (93). The transmission rod (92) is rotatably mounted on the side wall of the L-shaped frame (1). The transmission rod (92) is inclined. The upper end of the transmission rod (92) is connected and assembled with the lower end of the screw (10) through the universal joint (91). The lower end of the transmission rod (92) is fixedly mounted with a butterfly knob (93).

8. The cable protection device for an underground coal mining machine according to claim 1, characterized in that: The connecting component (2) includes a hook (21) and a buckle (22). The buckle (22) is fixedly installed on the side wall of the straight frame (3), and the hook (21) is fixedly installed on the right end of the L-shaped frame (1). The hook (21) and the buckle (22) are hooked and assembled.

9. The cable protection device for an underground coal mining machine according to claim 8, characterized in that: The upper end of the straight plate frame (3) is an arc-shaped top structure. An arc-shaped groove is provided on the side of the arc-shaped top structure near the guide wheel (6). A protrusion (13) matching the arc-shaped groove is provided on the right end of the L-shaped frame (1).

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