Coal mine cable quick winding and unwinding device

Abstract

The application discloses a coal mine cable quick winding and unwinding device, which comprises a machine box, a winding wheel, a driving motor, a transmission assembly and a control mechanism. The winding wheel is located in the machine box and is pivotally connected with the machine box through a transmission shaft. The driving motor is located in the machine box and is drivingly connected with the transmission shaft of the winding wheel through the transmission assembly. An outlet is arranged on the side wall of the machine box. A cannon line is wound on the winding wheel. One end of the cannon line is led out of the machine box through the outlet. The control mechanism is arranged on the machine box and is electrically connected with the driving motor to control the start and stop of the driving motor. The coal mine cable quick winding and unwinding device provided by the application improves the winding and unwinding efficiency, shortens the time for winding and unwinding a single hundred-meter cannon line to less than five minutes, reduces the maintenance cost and is safe.

Description

Technical Field

[0001] This invention relates to the field of underground blasting technology in coal mines, and in particular to a rapid cable retraction and deployment device for coal mines. Background Technology

[0002] Currently, the traditional methods of setting and retrieving blasting wire in the industry rely on workers manually dragging and winding the wire, or using simple hand-cranked reels to complete the winding operation. These methods have many technical drawbacks and safety hazards:

[0003] 1. Low deployment and retrieval efficiency and high work intensity: Coal mine blasting operations typically require laying blast lines hundreds of meters long. When deployed and retrieval are done manually, workers must drag and arrange the cables section by section, with each set of blast lines taking 10 to 20 minutes to deploy or retrieval. This not only severely slows down the overall progress of the blasting cycle but also significantly increases the physical burden on underground personnel. Prolonged work can easily lead to fatigue, thereby increasing the risk of human error.

[0004] 2. The blasting wire has a high damage rate and short service life. During manual deployment and retraction, the blasting wire is prone to scraping and dragging against the rough rock walls and metal components underground, or excessive bending and knotting due to uneven manual winding force. This leads to wear on the cable sheath and breakage of the internal copper wires, directly reducing the insulation performance and conductivity stability of the blasting wire. Frequent damage not only increases the replacement cost of the blasting wire, but also causes safety accidents such as leakage and accidental detonation due to insulation failure.

[0005] 3. Lack of safety protection and standardized management: Most existing simple deployment and retraction devices lack integrated electrical protection modules. If overload, short circuit, or other abnormal conditions occur during the deployment and retraction of the blast line, automatic power-off protection cannot be achieved, which can easily lead to motor burnout or even underground electrical fires. Randomly twisted cables are prone to crisscrossing and confusion, making it difficult to quickly sort out the wiring during operations, increasing the probability of incorrect or missing wiring.

[0006] 4. Insufficient portability and adaptability: Some traditional hand-cranked devices are bulky and cumbersome to operate, making them difficult to move and deploy in narrow underground tunnels and undulating terrain. Summary of the Invention

[0007] This invention is based on the inventor's discoveries and understanding of the following facts and problems: The deployment and retrieval of artillery lines rely on manual labor, which is inefficient.

[0008] The present invention aims to at least partially solve one of the technical problems in the related art.

[0009] Therefore, embodiments of the present invention propose a rapid cable winding and unwinding device for coal mines, comprising a housing, a winding reel, a drive motor, a transmission assembly, and a control mechanism. The winding reel is located inside the housing and is pivotally connected to the housing via a transmission shaft. The drive motor is located inside the housing and is connected to the transmission shaft of the winding reel via the transmission assembly. A cable outlet is provided on the side wall of the housing. A blasting wire is wound on the winding reel, and one end of the blasting wire passes through the cable outlet and exits the housing. The control mechanism is arranged on the housing and electrically connected to the drive motor to control the start and stop of the drive motor.

[0010] The coal mine cable rapid deployment and retraction device according to embodiments of the present invention improves deployment and retraction efficiency, reducing the deployment and retraction time of a single 100-meter blasting line to less than five minutes, reducing maintenance costs, and ensuring good safety.

[0011] In some embodiments, the transmission assembly includes a gear set disposed between the output shaft of the drive motor and the transmission shaft.

[0012] In some embodiments, the winding wheel includes a first winding wheel and a second winding wheel, the first winding wheel and the second winding wheel are coaxially arranged on the drive shaft, the surfaces of the first winding wheel and the second winding wheel are provided with cable guide grooves, and the outer circumferential surfaces of the first winding wheel and the second winding wheel are provided with anti-slip textures.

[0013] In some embodiments, the outlet is provided with a wear-resistant rubber pad and an arc-shaped guide structure. The wear-resistant rubber pad is disposed on the outlet side in the outlet direction, and the arc-shaped guide structure is arranged on the outlet side in the inlet direction. The blasting wire passes through the arc-shaped guide structure and the wear-resistant rubber pad in sequence and exits the chassis.

[0014] In some embodiments, a manual take-up handle and a clutch are also included. The manual take-up handle is disposed on the outside of the chassis, and the clutch is located between the manual take-up handle and the drive shaft. The clutch can switch between an engaged state and a disengaged state. In the disengaged state, the drive motor drives the drive shaft to rotate through the transmission assembly. In the engaged state, the manual take-up handle is connected to the drive shaft, and the drive shaft is driven to rotate by rotating the manual take-up handle.

[0015] In some embodiments, the clutch is a gear-type clutch, and a lever is provided on the outside of the chassis. The lever is connected to the clutch, and moving the lever can switch the clutch between the engaged state and the disengaged state.

[0016] In some embodiments, the drive motor is a DC geared motor, the control mechanism includes a speed regulating circuit, the speed regulating circuit is electrically connected to the drive motor, and a Hall sensor is provided on the drive motor, the Hall sensor is electrically connected to the speed regulating circuit to provide feedback on the rotational speed.

[0017] In some embodiments, a protection mechanism is also included, which includes an overload protection unit, a short circuit protection unit, and a leakage current detection unit. The overload protection unit, short circuit protection unit, and leakage current detection unit are electrically connected to the drive motor. A fault status indicator light is arranged on the outer wall of the chassis and is communicatively connected to the overload protection unit, short circuit protection unit, and leakage current detection unit.

[0018] In some embodiments, the chassis includes a metal frame and a housing that surrounds the outside of the metal frame, and a handle is provided on the top of the chassis.

[0019] In some embodiments, the chassis is pivotally connected to an access door via a sealing hinge, and anti-slip pads are provided at the four corners of the bottom of the chassis.

[0020] This application offers the following advantages: Mechanized and automated control of downhole blast line deployment and retrieval operations is achieved through a drive shaft and transmission components connected to the drive motor via a winding reel and control mechanism, reducing manual labor intensity and improving operational efficiency. A gear set positioned between the drive motor output shaft and the drive shaft ensures a smooth transition from high motor speed to high drive shaft torque, guaranteeing stable and reliable power transmission during the retrieval process. The coaxially arranged first and second winding reels, with guide grooves and anti-slip textures on their surfaces, enable parallel and uniform winding of multiple cable sets, effectively preventing blast line slippage, crossing, and knotting damage. Wear-resistant rubber pads and arc-shaped guide structures on the inlet and outlet sides provide smooth buffering and wear protection during blast line extraction, reducing wear caused by friction between the cable sheath and the machine casing edge. A manual retrieval handle and clutch on the outside of the casing allow for switching between electric and manual retrieval modes, ensuring emergency blast line retrieval even in the event of power outages or motor failures. A geared clutch and a lever connected to it and located on the outside of the chassis enable rapid physical switching to manual emergency mode, simplifying operation procedures and reducing response time under extreme conditions. A DC geared motor, speed control circuit, and Hall effect sensor for speed feedback enable stepless adjustment of cable winding and unwinding speed, optimizing motor output power based on load changes. A protection mechanism provides automatic power-off locking and rapid fault visualization in abnormal conditions, eliminating the risk of underground fires and electric shocks from an electrical perspective. The outer casing encasing the metal frame and the top handle of the chassis achieve lightweight and portable design, improving the efficiency of single-person handling and deployment in narrow or undulating tunnels. A sealed hinged access door and anti-slip pads at the four bottom corners provide excellent sealing protection in humid and dusty underground environments and ensure stable, anti-slip operation during cable winding and unwinding. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a rapid cable take-up and take-up device for coal mines according to an embodiment of the present invention.

[0022] Reference numerals in the attached diagram: 1. Chassis; 2. First winding reel; 3. Second winding reel; 4. Drive shaft; 5. Cable outlet; 6. Wear-resistant rubber pad; 7. Manual take-up handle; 8. Drive motor; 9. Handle; 10. Protective mechanism; 11. Sealing hinge; 12. Battery; 13. Explosion cable. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] An embodiment of the present invention provides a rapid cable winding and unwinding device for coal mines, comprising a housing 1, a winding reel, a drive motor 8, a transmission assembly, and a control mechanism. The winding reel is located inside the housing 1 and is pivotally connected to the housing 1 via a transmission shaft 4. The drive motor 8 is located inside the housing 1 and is connected to the transmission shaft 4 of the winding reel via the transmission assembly. A cable outlet 5 is provided on the side wall of the housing 1. A blasting wire is wound on the winding reel, and one end of the blasting wire passes through the cable outlet 5 and exits the housing 1. The control mechanism is arranged on the housing 1 and electrically connected to the drive motor 8 to control the start and stop of the drive motor 8.

[0025] The housing 1 serves as the protective structure of the device, effectively isolating it from the harsh environment of dampness and dust underground. The winding reel is pivotally connected to the housing 1 via the drive shaft 4, allowing the reel to rotate freely around the axis of the drive shaft 4, thus enabling the winding and release of the blasting wire. The drive motor 8 is fixed inside the housing 1, and its output shaft is connected to the drive shaft 4 of the winding reel via a transmission assembly. The drive motor 8 uses a DC geared motor as its power source. The wire outlet 5 is located on the side wall of the housing 1. One end of the blasting wire is wound onto the winding reel, and the other end passes through the wire outlet 5 and exits the housing 1. The control mechanism is located on the housing 1 and electrically connected to the drive motor 8 to control the start and stop of the drive motor 8. The control mechanism includes a start button and a stop button, along with intuitive status indicator lights, making operation simple and requiring no lengthy training.

[0026] In some embodiments, the transmission component includes a gear set disposed between the output shaft of the drive motor 8 and the transmission shaft 4.

[0027] Specifically, the gear set serves as an intermediate link in power transmission. The driving gear connects to the output shaft of the drive motor 8 and rotates synchronously with it. The driven gear connects to the transmission shaft 4 of the winding wheel and drives the transmission shaft 4 to rotate synchronously. The driving and driven gears mesh with each other to achieve the transmission and transformation of torque and speed. The gear set can use different types such as spur gears, helical gears, or bevel gears. The selection is based on the spatial layout and the included angle between the output shaft of the drive motor 8 and the transmission shaft 4. When the output shaft and the transmission shaft 4 are parallel, spur gears or helical gears are used; when they are perpendicular, bevel gears are used.

[0028] Through gear transmission, the rotational motion output by the drive motor 8 is transmitted to the transmission shaft 4 via the gear set, driving the winding reel to rotate around its own axis, thus achieving the winding, retrieval, or release of the blasting wire. The gear ratio between the driving and driven gears in the gear set determines the transmission ratio. By selecting gear sets with different gear ratios, the rotational speed and output torque of the winding reel can be adjusted to adapt to the operational requirements of different diameter blasting wires and different take-up and release speeds. The gear transmission can be engaged with a gear-type clutch in the manual take-up mechanism, allowing the gear set to perform the function of speed reduction and torque amplification in electric mode. This ensures that the motor output torque, after being amplified by the gear set, is sufficient to drive the winding reel fully loaded with blasting wire to rotate smoothly. In manual mode, this does not increase hand cranking resistance, as the handle directly drives the transmission shaft 4 without going through the gear set, avoiding the frictional resistance of the gear set from increasing the hand cranking load.

[0029] In some embodiments, the winding wheel includes a first winding wheel 2 and a second winding wheel 3, which are coaxially arranged on the drive shaft 4. The surfaces of the first winding wheel 2 and the second winding wheel 3 are provided with cable guide grooves, and the outer circumferential surfaces of the first winding wheel 2 and the second winding wheel 3 are provided with anti-slip textures.

[0030] Specifically, the first winding reel 2 and the second winding reel 3 are coaxially arranged on the drive shaft 4, forming a dual-wheel parallel take-up mechanism. The coaxial arrangement allows the two winding reels to share the same drive shaft 4. When the drive motor 8 drives the drive shaft 4 to rotate, it causes the first winding reel 2 and the second winding reel 3 to rotate synchronously, enabling single-wheel take-up and release or dual-wheel parallel operation. The dual-wheel configuration more than doubles the take-up efficiency of a single operation. The second winding reel 3, as a spare reel, can be quickly switched to handle different lengths of blasting lines, preventing operation interruptions due to single-wheel failure.

[0031] The first winding wheel 2 and the second winding wheel 3 are provided with wire guide grooves. The guide grooves are distributed in a spiral continuous groove along the outer circumference of the winding wheel. The pitch is determined according to the diameter of the blasting wire, ensuring that the blasting wire is closely arranged and does not overlap between adjacent turns. The blasting wire is wound evenly layer by layer on the wheel surface of the winding wheel along a predetermined trajectory, ensuring that the blasting wire is wound evenly and without knots, avoiding excessive bending of the blasting wire due to uneven force during winding, and reducing bending wear.

[0032] Anti-slip patterns are provided on the outer circumferential surfaces of the first winding wheel 2 and the second winding wheel 3. The anti-slip patterns can be straight raised ridges extending along the axial direction of the winding wheel, or diamond-shaped raised dots distributed in a grid pattern, or annular teeth that surround the circumference. The purpose of the anti-slip patterns is to increase the friction between the wire and the outer circumferential surface of the winding wheel, prevent axial slippage or radial loosening on the wheel surface due to insufficient wire tension during the winding process, and ensure tight winding.

[0033] The wire guide groove defines the axial arrangement of the wire on the wheel surface, while the anti-slip texture provides sufficient tangential gripping force, ensuring that the wire coils are arranged in an orderly yet moderately tight manner, preventing tangling and knotting during subsequent release due to loose arrangement. The wire guide groove ensures that the wire release sequence is the reverse of the winding sequence, and the anti-slip texture prevents the wire from slipping and becoming disordered on the wheel surface due to inertia during release, making the release and take-up process smooth and controllable. Optionally, the outer diameter of the first winding wheel 2 and the second winding wheel 3 can be set to be the same to accommodate wire of equal length, or they can be set to be different to accommodate wire types of different diameter specifications. A partition can be installed between the first winding wheel 2 and the second winding wheel 3, fixed to the drive shaft 4 and located between the two winding wheels, to prevent the wire from crossing from one winding wheel to the other during parallel operation, thus preventing wire from getting tangled.

[0034] In some embodiments, the outlet 5 is provided with a wear-resistant rubber pad 6 and an arc-shaped guide structure. The wear-resistant rubber pad 6 is located on the inlet side of the outlet 5, and the arc-shaped guide structure is arranged on the outlet side of the outlet 5. The blasting wire passes through the arc-shaped guide structure and the wear-resistant rubber pad 6 in sequence and exits the housing 1.

[0035] Specifically, the cable guide structure determines the bending arc of the cable, and the wear-resistant rubber pad 6 provides friction buffering. The arc guide structure guides the cable to turn smoothly at an angle, avoiding sharp bends and damage. The wear-resistant rubber pad 6 forms a flexible isolation between the cable and the metal shell, preventing direct friction between the cable and the metal shell and extending the cable's service life. The radius of curvature of the arc guide structure is designed to be 8 to 12 times the diameter of the cable, ensuring that the bending stress of the cable is within the elastic range and does not produce permanent plastic deformation. The arc guide structure pre-adjusts the cable's output direction to be consistent with the axis of the outlet 5, allowing the cable to enter the wear-resistant rubber pad 6 with a minimum deflection angle, reducing wear on the edge of the rubber pad. The wear-resistant rubber pad 6 provides uniform circumferential clamping force, preventing the cable from vibrating and generating friction at the outlet 5, minimizing the resistance to cable output. The "inlet side" refers to the side where the wire enters the outlet 5, i.e., the inside of the housing 1. The "outlet side" refers to the side where the wire exits the housing 1, i.e., the outside of the housing 1. As the wire travels from the winding reel to the outlet 5 inside the housing 1, it first contacts the concave surface of the arc-shaped guide structure. After turning past this concave surface, it contacts the buffer surface of the wear-resistant rubber pad 6. The arc-shaped guide structure can be an arc-shaped guide roller, including a nylon wheel and a rolling bearing. The roller supports the wire, and the rolling bearing is connected to the housing so that the roller can rotate relative to the housing.

[0036] Optionally, the wear-resistant rubber pad 6 has a chamfered bevel on the side facing the incoming line. The chamfered bevel smoothly connects to the end of the arc-shaped guide structure, forming a curved surface from the guide arc surface to the rubber pad buffer surface, preventing the blast line from impacting due to the stepped drop at the junction of the two. The wear-resistant rubber pad 6 is detachable and can be quickly replaced after wear, without the need for a complete disassembly device, making it suitable for damp, dusty, and complex terrain working environments underground. The wear-resistant rubber pad 6 can be configured as a composite structure of multiple rubber layers with different hardness. The surface layer in direct contact with the blast line uses low-hardness wear-resistant rubber to provide a larger amount of buffer deformation, while the bottom layer uses high-hardness support rubber to prevent the pad from excessively denting under the tension of the blast line and losing its guiding function. Optionally, a dust removal ring can also be installed on the side facing the incoming line of the outlet 5. The dust removal ring is located between the arc-shaped guide structure and the winding wheel, and is used to scrape off coal dust particles attached to the surface of the blast line before it enters the arc-shaped guide structure, preventing particles from entering the arc-shaped guide structure and the wear-resistant rubber pad 6 with the blast line and aggravating wear.

[0037] In some embodiments, a manual winding handle and a clutch are also included. The manual winding handle is located on the outside of the housing 1, and the clutch is located between the manual winding handle and the drive shaft 4. The clutch can switch between an engaged state and a disengaged state. In the disengaged state, the drive motor 8 drives the drive shaft 4 to rotate through the transmission assembly. In the engaged state, the manual winding handle is connected to the drive shaft 4, and the drive shaft 4 is driven to rotate by rotating the manual winding handle.

[0038] Specifically, the clutch is located between the manual retractor handle and the drive shaft 4. Operators can perform manual emergency operations from outside the housing 1 without opening it, adapting to the needs of working in confined underground spaces. The clutch can switch between engaged and disengaged states. In the disengaged state, the drive motor 8 drives the drive shaft 4 to rotate via the transmission assembly. The power transmission path between the manual retractor handle and the drive shaft 4 is cut off, and the handle does not rotate with the drive shaft 4, preventing accidental injury to the operator from a high-speed rotating handle. In the engaged state, the manual retractor handle is connected to the drive shaft 4. Rotating the manual retractor handle drives the drive shaft 4 to rotate. At this time, the transmission assembly between the drive motor 8 and the drive shaft 4 remains connected, but the motor is de-energized. The gear set passively rotates with the drive shaft 4 but does not generate driving force. As a power switching structure between electric and manual drive, the clutch only requires moving a lever, resulting in a short operation time and ensuring a quick switch to manual mode even in extreme conditions such as power outages underground.

[0039] The manual emergency take-up mechanism works in conjunction with the dual-wheel parallel take-up mechanism. When the clutch is engaged, the operator turns the handle to drive the drive shaft 4, which in turn drives the coaxially arranged first winding wheel 2 and second winding wheel 3 to rotate synchronously. Both wheels can be manually operated for take-up, allowing for the simultaneous retrieval of two wires in parallel take-up mode, improving retrieval efficiency in emergency situations. In manual mode, the hand crank speed is lower than in electric mode, and the wire is smoothly guided out through the arc-shaped guide structure at a slower speed. The wear-resistant rubber pad 6 provides sufficient cushioning at low speeds, reducing wire wear. The slow take-up allows the wire guide groove more time to guide the wire evenly, preventing tangling and loosening caused by unstable speed during manual operation. The rotation direction of the manual take-up handle is the same as the rotation direction of the drive motor 8 driving the drive shaft 4 in electric mode, ensuring that the winding wheels rotate in the same direction for take-up or unwinding regardless of whether it is electric or manual mode, preventing operator errors due to directional confusion. In conjunction with the power supply system of 12 lithium batteries, when the power of the 12 lithium batteries is exhausted or the 12 battery modules need to be replaced, the clutch switches to the engaged state, and the device can complete the current take-up and take-down operation manually without the operation stopping due to power interruption.

[0040] In some embodiments, the clutch is a gear-type clutch, and a lever is provided on the outside of the housing 1. The lever is connected to the clutch, and moving the lever can switch the clutch between the engaged state and the disengaged state.

[0041] Specifically, the gear-type clutch includes a driving end face gear plate and a driven end face gear plate. The driving end face gear plate is fixedly connected to the rotating shaft of the manual take-up handle, and the driven end face gear plate is fixedly connected to the end of the drive shaft 4. The lever is connected to the sliding gear plate in the clutch via a shift fork. When the lever is moved, the shift fork pushes the sliding gear plate to move axially, realizing the engagement or disengagement of the end face gears. The switching operation only requires moving the lever to complete the power switching, ensuring rapid response in extreme conditions such as downhole power outages and improving operational reliability. The gear-type structure forms a rigid engagement of the end face gears in the engaged state, with no relative slippage, ensuring that the manual torque is transmitted to the drive shaft 4, avoiding the slippage phenomenon that may occur in friction plate clutches, and making the rotation angle of the handle correspond to the rotation angle of the drive shaft 4, allowing the operator to control the take-up length and speed. The lever is located on the outside of the housing 1, allowing the operator to complete the switching operation without opening the housing 1, adapting to the needs of working in narrow downhole spaces.

[0042] Optionally, an extension arm is provided at the end of the lever, extending to the front operating panel area of ​​the housing 1, allowing the operator to reach and switch while standing facing the cable outlet 5, without having to go around to the side of the device, thus shortening the response path. The gear-type clutch is located between the inner side of the housing 1 wall and the end of the drive shaft 4. The lever's shaft passes through the housing 1 wall, with one end located on the outside of the housing 1 for the operator to hold and operate, and the other end located on the inside of the housing 1 and fixedly connected to the shift fork. The lever's shaft and the manual take-up handle's shaft are parallel but not coaxial. The lever's swing motion is converted into the axial linear motion of the sliding gear through the shift fork, completing the power path on / off control.

[0043] In some embodiments, the drive motor 8 is a DC geared motor, the control mechanism includes a speed regulating circuit, the speed regulating circuit is electrically connected to the drive motor 8, and a Hall sensor is provided on the drive motor 8, the Hall sensor is electrically connected to the speed regulating circuit to provide feedback on the rotational speed.

[0044] Specifically, the drive motor 8 is a DC geared motor with an integrated reduction gear set. Its output characteristics are low speed and high torque, suitable for the load requirements of blast line deployment and retrieval operations that require significant pulling force but cannot tolerate excessive speed, thus preventing insufficient torque from causing the blast line to slack or stall. The control mechanism includes a speed control circuit electrically connected to the drive motor 8. It uses PWM pulse width modulation to adjust the motor terminal voltage, achieving stepless adjustment of the deployment and retrieval speed. The retrieval speed can reach 10m / min, shortening operation time. A Hall sensor is installed on the drive motor 8, fixed inside the motor end cover and near the rotor magnetic poles, and electrically connected to the speed control circuit to provide real-time feedback of the rotational speed signal. The speed control circuit compares the real-time rotational speed fed back by the Hall sensor with the preset target rotational speed, and automatically adjusts the speed according to the speed deviation to form a closed-loop speed control. The controller automatically adjusts the output power according to the load change to avoid overload. When the resistance of the worm wire winding increases, the downward trend of the rotational speed is captured by the Hall sensor, and the speed control circuit immediately increases the output power to maintain the set speed. When the resistance decreases, the power is reduced to prevent runaway, ensuring that the worm wire guide groove guides the worm wire to wind evenly under uniform speed conditions, reducing bending and wear.

[0045] Three Hall effect sensors are evenly distributed at 120° intervals along the circumference of the motor end cover. The speed control circuit obtains both rotor position and speed information from these sensors, improving speed detection resolution and direction determination, and preventing speed control failure due to the loss of a single sensor signal in the downhole vibration environment. The speed control circuit works in conjunction with the overload protection unit in protection mechanism 10. The speed control circuit performs active power limiting when the load suddenly increases, while the overload protection unit performs passive power-off locking when abnormal operating conditions persist, forming a dual guarantee for the safe operation of the motor. The built-in reduction structure of the DC geared motor handles the main reduction ratio, while the external gear set handles the final speed ratio fine-tuning and power steering. The speed signal fed back by the Hall effect sensors is used to monitor the operating status of the entire transmission chain. When the external gear set jams, causing a sudden increase in load, the sudden drop in speed signal triggers the speed control circuit's protection action, preventing gear breakage. The speed control circuit is electrically connected to the speed control knob located on the outer wall of the chassis 1. The speed control knob uses a rotary encoder. When the operator rotates the speed control knob, it outputs a digital pulse signal, and the speed control circuit determines the target speed accordingly. The rotary encoder has reliable contact and is resistant to dust pollution in the humid environment underground.

[0046] In some embodiments, a protection mechanism 10 is also included. The protection mechanism 10 includes an overload protection unit, a short circuit protection unit, and a leakage current detection unit. The overload protection unit, short circuit protection unit, and leakage current detection unit are electrically connected to the drive motor 8. A fault status indicator light is arranged on the outer wall of the chassis 1 and is communicatively connected to the overload protection unit, short circuit protection unit, and leakage current detection unit.

[0047] Specifically, the overload protection unit, short-circuit protection unit, and leakage detection unit are electrically connected to the drive motor 8. These units trigger automatic power-off and motor locking under abnormal operating conditions, eliminating the electrical risks of motor burnout and fires caused by leakage, thus improving the safety of underground operations. Fault status indicator lights are located on the outer wall of the chassis 1 and are communicatively connected to the overload protection unit, short-circuit protection unit, and leakage detection unit. These lights provide visual indications to operators when a fault occurs, allowing maintenance personnel to quickly locate the problem and facilitate repairs. The overload protection unit is connected in series with the power supply line of the drive motor 8. It trips the circuit after the operating current exceeds the rated value for a set time. The short-circuit protection unit is connected in parallel at the motor end, instantaneously disconnecting the power supply when a short-circuit current is detected. The leakage detection unit is installed between the power line and the grounding terminal of the chassis 1. It triggers a trip when the residual current exceeds a safety threshold. All three units detect independently but share the same power-off actuator, achieving coverage for different fault types.

[0048] The fault status indicator lights are set as multi-color LED combinations, with different colors and flashing frequencies corresponding to different fault types. For example, solid red indicates overload protection activation, rapid red flashing indicates short circuit protection activation, solid yellow indicates leakage detection activation, and solid green indicates all is normal. These indicator lights, along with the status indicator lights and power indicator lights in the speed control circuit, are arranged together in the control panel area of ​​chassis 1, allowing operators to easily identify the fault type in the dimly lit underground environment by color and flashing pattern, without needing to check each unit individually. The fault status indicator lights are connected to the output terminals of each protection unit via shielded signal cables. The signal cables are routed along the inner wall of chassis 1 and spaced apart from the power cables to avoid false alarms caused by strong electrical interference. The protection mechanism 10 is integrated with the gear-type clutch and manual emergency reel-in mechanism: when the protection mechanism 10 locks the motor due to a fault, the operator can switch the clutch to the engaged state without troubleshooting, and rotate the manual reel-in handle to directly drive the drive shaft 4 to complete the emergency reel-in. Safety power-off and emergency reel-in do not conflict, ensuring that the protection action will not result in the blast line being unrecoverable. Optionally, the protection mechanism 10 works in conjunction with the high-capacity lithium battery 12 to trigger protection actions when the battery 12 is over-discharged or abnormally charged, completely isolating the lithium battery 12 from the motor circuit, preventing thermal runaway of the battery 12, ensuring the electrical safety of the whole machine, and together with the charging protection unit of the modular quick-change battery 12, forming a double safety barrier on the battery 12 side and the motor side.

[0049] In some embodiments, the chassis 1 includes a metal frame and a shell that covers the outside of the metal frame, and a handle 9 is provided on the top of the chassis 1.

[0050] Specifically, the metal frame, serving as the load-bearing skeleton of the chassis 1, is constructed from aluminum alloy profiles through welding or bolting, providing a rigid installation reference and preventing relative displacement of components in the underground vibration environment from causing a decrease in transmission accuracy. The shell, made of high-strength engineering plastic injection molding or aluminum alloy sheet bending, covers the top, bottom, and four sides of the metal frame, forming a closed protective chamber that isolates the internal moving parts from underground dust, humid air, and collisions with the rock walls. The metal frame bears the radial and axial loads transmitted by the winding reel during wire winding operations. The shell primarily provides dustproof, waterproof, and minor impact protection. The combination of the frame's rigidity and the shell's lightweight design keeps the overall weight below 15kg, a reduction of over 40% compared to the all-metal cast chassis 1, while maintaining sufficient structural strength. This reduces the difficulty of moving and deploying the device in narrow underground tunnels, shortening deployment time to 3 to 5 minutes.

[0051] Handle 9 is fixed to the top beam of the metal frame, and its two ends are connected to the top longitudinal beam of the frame by bolts or welding. The gripping part of handle 9 protrudes at least 50mm above the top surface of the housing, providing gripping space for the operator. A single person can complete the handling and deployment by carrying handle 9, reducing the workload of the operator. Handle 9 is located in the central area of ​​the top of the housing 1, so that the center of gravity of the device is directly below handle 9. During handling, the device remains horizontal and does not tilt, avoiding the device from tipping over and bumping during the handling process due to the shift of the center of gravity. The gripping part of handle 9 is covered with a rubber anti-slip sleeve. The surface of the anti-slip sleeve has axial ridges to increase the friction of the hand and prevent the device from falling due to slippage in the wet underground environment.

[0052] In some embodiments, the chassis 1 is pivotally connected to the access door via a sealing hinge 11, and anti-slip pads are provided at the four corners of the bottom of the chassis 1.

[0053] Specifically, the sealing hinge 11 is located at the connection edge between the housing 1 and the access door. The hinge's pivot axis allows the access door to rotate relative to the housing 1 around a vertical or horizontal axis to open and close. An elastic sealing strip is embedded inside the sealing hinge 11. When the access door is closed, this sealing strip is pressed between the inner wall of the access door and the edge of the opening in the housing 1, forming a continuous sealing strip. This prevents humid air, dust, and coal slurry from entering the housing 1, protecting electrical components from corrosion and short-circuit risks. The cooperation between the sealing hinge 11 and the access door allows maintenance personnel to open the access door without completely disassembling the housing 1, quickly completing tasks such as replacing the winding reel, replacing the wear-resistant rubber pad 6, or inspecting internal wiring. This reduces maintenance time and meets the requirements of limited working hours underground. Sealing hinges 11 are located at the front or side opening of the housing 1. The height and width of the access door cover the installation area of ​​the winding wheel and drive shaft 4. After opening, operators can directly access the wear-resistant rubber pads 6 on the surface of the winding wheel and the inside of the outlet 5 without disassembling other parts. Anti-slip pads are fixedly installed in the mounting holes at the four corners of the bottom of the metal frame or bolted to the four corners of the bottom surface of the housing, forming multi-point support with the bottom of the housing 1. The anti-slip pads are made of rubber or polyurethane elastomer material, and their bottom surface is provided with anti-slip textures or suction cup grooves to increase the coefficient of friction with the ground, ensuring that the device is not easily slipped or displaced when placed on sloping ground or wet coal sludge ground underground, avoiding problems such as blast wire detachment and cable tangling caused by equipment shaking during operation. The height of the anti-slip pads is not less than 15mm, so that there is sufficient clearance between the bottom surface of the housing 1 and the ground, preventing water, coal sludge or gravel from directly contacting the bottom of the housing and causing corrosion or scratches. In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A rapid cable retraction and deployment device for coal mines, characterized in that, include: The device comprises a housing, a winding reel, a drive motor, a transmission assembly, and a control mechanism. The winding reel is located inside the housing and is pivotally connected to the housing via a transmission shaft. The drive motor is located inside the housing and is connected to the transmission shaft of the winding reel via the transmission assembly. A wire outlet is provided on the side wall of the housing. The wire is wound on the winding reel, and one end of the wire passes through the wire outlet and exits the housing. The control mechanism is arranged on the housing and electrically connected to the drive motor to control the start and stop of the drive motor.

2. The coal mine cable rapid take-up and release device according to claim 1, characterized in that, The transmission assembly includes a gear set, which is disposed between the output shaft of the drive motor and the transmission shaft.

3. The rapid take-up and release device for coal mine cables according to claim 1, characterized in that, The winding wheel includes a first winding wheel and a second winding wheel, which are coaxially arranged on the drive shaft. The surfaces of the first winding wheel and the second winding wheel are provided with cable guide grooves, and the outer circumferential surfaces of the first winding wheel and the second winding wheel are provided with anti-slip textures.

4. The rapid take-up and release device for coal mine cables according to claim 1, characterized in that, The outlet is provided with a wear-resistant rubber pad and an arc-shaped guide structure. The wear-resistant rubber pad is located on the outlet side in the outgoing direction, and the arc-shaped guide structure is arranged on the ingoing direction side of the outlet. The blasting wire passes through the arc-shaped guide structure and the wear-resistant rubber pad in sequence and exits the chassis.

5. The rapid take-up and release device for coal mine cables according to claim 1, characterized in that, It also includes a manual take-up handle and a clutch. The manual take-up handle is located on the outside of the housing, and the clutch is located between the manual take-up handle and the drive shaft. The clutch can switch between an engaged state and a disengaged state. In the disengaged state, the drive motor drives the drive shaft to rotate through the transmission assembly. In the engaged state, the manual take-up handle is connected to the drive shaft, and the drive shaft is driven to rotate by rotating the manual take-up handle.

6. The rapid take-up and release device for coal mine cables according to claim 5, characterized in that, The clutch is a gear-type clutch, and a lever is provided on the outside of the chassis. The lever is connected to the clutch, and moving the lever can switch the clutch between the engaged state and the disengaged state.

7. The rapid take-up and release device for coal mine cables according to claim 1, characterized in that, The drive motor is a DC geared motor, and the control mechanism includes a speed regulation circuit that is electrically connected to the drive motor. A Hall sensor is installed on the drive motor and is electrically connected to the speed regulation circuit to provide feedback on the rotational speed.

8. The rapid take-up and release device for coal mine cables according to claim 1, characterized in that, It also includes a protection mechanism, which includes an overload protection unit, a short circuit protection unit, and a leakage current detection unit. The overload protection unit, short circuit protection unit, and leakage current detection unit are electrically connected to the drive motor. A fault status indicator light is arranged on the outer wall of the chassis and is communicatively connected to the overload protection unit, short circuit protection unit, and leakage current detection unit.

9. The rapid take-up and release device for coal mine cables according to claim 1, characterized in that, The chassis includes a metal frame and a shell that covers the outside of the metal frame, and a handle is provided on the top of the chassis.

10. The rapid take-up and release device for coal mine cables according to claim 1, characterized in that, The chassis is pivotally connected to the access door via a sealed hinge, and anti-slip pads are provided at the four corners of the bottom of the chassis.

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