Digital anti-explosion crane steel wire rope paying-off device and using method thereof

Abstract

The present application relates to a kind of digital anti-explosion crane wire rope releasing device and its use method in hoisting technology field, device includes chassis, swing frame, turnover frame, screw lift and work shape reel;Turnover frame includes backplate and two arm rods, two arm rods are rotatably installed with two chucks in the inner side of outer end, and one chuck can be adjusted with the distance of another chuck by telescopic mechanism;The front side middle part of swing frame is rotatably connected with the middle part of backplate backplane, and backplate can be rotated and positioned in the plane of plate face by first motor drive, two bracing rods are fixed on the rear end of chassis both sides, and the top end of two bracing rods is rotatably connected with the both ends of swing frame by first rotation shaft;The mounting base and top nut of screw lift are rotatably connected with the middle part of rear end of chassis and the middle part of rear side of swing frame by second rotation shaft;The device can be adapted to hold different specifications of work shape reel, and dynamically control release wire rope torsional stress.

Description

Technical Field

[0001] This invention relates to the field of lifting and hoisting technology, and in particular to a wire rope releasing device for a digital explosion-proof crane and its usage method. Background Technology

[0002] As is widely known, in scenarios such as crane installation, port hoisting, and cableway erection, wire rope release is one of the core processes. However, the traditional structure that uses simple supports to support the I-beam reel for rope release no longer meets the needs of more intelligent, efficient, and interconnected digital explosion-proof cranes. This is because whether it is adding a motor to drive the I-beam reel for active rope release at the front end, or pulling the wire rope at the rear end for active rope release, the following drawbacks will exist:

[0003] First, for I-beams of different diameters and widths, the clamping fixtures need to be frequently changed or adjusted, resulting in poor adaptability, which further prolongs the unwinding preparation time, leading to low overall unwinding efficiency. Moreover, manual intervention can easily cause safety hazards, making it difficult to meet the demand for efficient and stable wire rope unwinding.

[0004] Secondly, the wire rope is spirally wound on the I-beam reel. When releasing the rope, internal stress is easily generated due to twisting. If it cannot be released in time, problems such as twisting, knotting, loose strands, and unraveling will occur, which will seriously reduce the service life of the wire rope and even cause safety accidents. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art and solve the existing technical problems, the present invention discloses a wire rope release device for a digital explosion-proof crane, which can be adapted to clamp I-shaped drums of different specifications and dynamically regulate and release the torsional stress of the wire rope.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A wire rope unwinding device for a digital explosion-proof crane includes a base frame, a swing frame, a tilting frame, a screw jack, and an I-shaped drum for winding the wire rope. The tilting frame includes a back plate and two booms vertically fixed to both ends of the front plate of the back plate. Two clamps for holding both ends of the I-shaped drum are rotatably installed on the inner side of the outer ends of the two booms, and one of the clamps can be adjusted in distance from the other clamp via a telescopic mechanism. The front middle of the swing frame is rotatably connected to the middle of the rear plate of the back plate, and the back plate can be rotated and positioned in the plane of the plate by a first motor. Two support rods are symmetrically fixed on both sides of the rear end of the base frame, and both ends of the swing frame are rotatably connected to the tops of the two support rods via a first rotating shaft. The mounting base and top nut of the screw jack are rotatably connected to the middle of the rear end of the base frame and the middle of the rear side of the swing frame via a second rotating shaft, respectively. Both the first and second rotating shafts are coaxial with the I-shaped drum.

[0008] Furthermore, the wire rope unwinding device for the digital explosion-proof crane also includes a controller, and a torsion detection unit for detecting the torsion state of the wire rope is installed at the front end of the base frame. The controller is connected to the first motor, the screw jack and the torsion detection unit respectively.

[0009] Furthermore, the torsion detection unit includes a housing, the bottom of which is mounted to the center of the front end of the base frame via a connecting rod frame. The front and rear walls of the housing are each provided with a rope-passing hole for the corresponding steel wire rope. Two parallel U-shaped guide wheels are symmetrically installed on both sides of the outer port of the rope-passing hole. Multiple movable wheel frames are evenly arranged around the steel wire rope inside the housing. An elastic element connects the tail end of each movable wheel frame to the corresponding inner wall of the housing. A detection wheel is rotatably mounted on the head end of each movable wheel frame. The wheel surface of the detection wheel circumferentially abuts against the steel wire rope, and an angle encoder is installed on the axle of the detection wheel.

[0010] Furthermore, the elastic element is a spring, and the spring has a sliding column and a sliding sleeve that are slidably connected. The corresponding ends of the sliding column and the sliding sleeve are respectively fixed to the movable wheel frame and the inner wall of the box.

[0011] Furthermore, the movable wheel frame is provided with four wheels, and the axles of the sliding column and the U-shaped guide wheel are parallel to the end wall of the box, and the axles of the sliding column and the U-shaped guide wheel have a 45-degree angle.

[0012] Furthermore, the torsion detection unit includes an industrial vision AI camera.

[0013] Furthermore, the telescopic mechanism includes a threaded sleeve fixed to the outer end of the arm, a screw rod threadedly connected to the threaded sleeve, a corresponding chuck bottom end rotatably mounted to the inner end of the screw rod, and a screw handle fixed to the outer end of the screw rod.

[0014] Furthermore, the swing frame is configured as a U-shaped structure including a crossbar and two longitudinal bars. The outer ends of the two longitudinal bars are rotatably connected to two support rods respectively. A slewing bearing is provided between the crossbar of the swing frame and the back plate. A frame plate is fixed to the middle of the front side of the crossbar of the swing frame. The slewing bearing includes an inner ring fixed to the frame plate and a toothed outer ring fixed to the back plate. The first motor is mounted on the frame plate, and the output shaft of the first motor is coaxially fixed with a drive gear that meshes with the toothed outer ring.

[0015] Furthermore, the screw jack is driven and controlled by a second motor.

[0016] A method for using a wire rope unwinding device for a digital explosion-proof crane involves first adjusting the lifting height of the screw jack according to the overall diameter of the wire rope wound on the I-shaped drum. This ensures that when the I-shaped drum is rotated and clamped between two clamps, a gap is left between the I-shaped drum, the wound wire rope, and the base frame, allowing for rope unwinding. During the unwinding process, the torsion detection unit detects the torsion direction of the wire rope and sends the feedback to the controller. The controller then controls the first drive motor to rotate, which in turn controls the back plate and the I-shaped drum to rotate in the direction of wire rope torsion, automatically releasing the torsional stress of the wire rope.

[0017] By employing the technical solution described above, the present invention has the following beneficial effects:

[0018] The present invention discloses a wire rope unloading device and its usage method for digital explosion-proof cranes. By cooperating with a screw jack and a telescopic mechanism, it can automatically adapt to I-beams of different diameters and widths without changing tooling, significantly improving unloading efficiency and safety. The screw jack has a stable load-bearing structure and a reliable safety locking mechanism, making it particularly suitable for heavy engineering scenarios. When the wire rope twists, the torsional stress can be eliminated by rotating the I-beam drum through a tilting frame. In particular, with the cooperation of a torsion detection unit, torsional stress data can be collected in real time. When the stress exceeds the limit, the I-beam drum is automatically driven to rotate in the opposite direction by a corresponding angle, dynamically releasing the internal stress and ensuring that the wire rope is always released in a straight state. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the implementation structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the connection structure of the flipping frame;

[0021] Figure 3 This is a structural schematic diagram of the screw jack.

[0022] Figure 4 This is an enlarged schematic diagram of one embodiment of the torsion detection unit;

[0023] Figure 5 yes Figure 4 A cross-sectional view of the torsion detection unit.

[0024] In the diagram: 1. Base frame; 2. Support rod; 3. Frame plate; 4. Screw jack; 401. Mounting base; 402. Top nut; 5. First motor; 6. Swing frame; 7. Back plate; 8. Arm; 9. Torsion detection unit; 901. Box body; 902. U-shaped guide wheel; 903. Movable wheel frame; 904. Detection wheel; 905. Angle encoder; 906. Spring; 907. Sliding column; 908. Sliding sleeve; 10. Chuck; 11. Connecting rod; 12. I-shaped drum; 13. Screw sleeve; 14. Tightening handle; 15. Drive gear; 16. Slewing bearing. Detailed Implementation

[0025] The technical solution of the present invention will be described below with reference to the accompanying drawings of the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the accompanying drawings of the present invention for the convenience of describing the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation.

[0026] Example 1:

[0027] Combined with appendix Figure 1-3 The aforementioned wire rope unwinding device for a digital explosion-proof crane includes a base frame 1, a swing frame 6, a tilting frame, a screw jack 4, and an I-shaped drum 12 for winding the wire rope. The tilting frame includes a back plate 7 and two booms 8 vertically fixed to both ends of the front surface of the back plate 7. The back plate 7 connects to the swing frame 6 and provides rotational support, while the booms 8 extend forward of the back plate 7 to form a clamping space. Two clamps 10 are rotatably mounted on the inner sides of the outer ends of the two booms 8 for clamping both ends of the I-shaped drum 12. These clamps 10 can clamp the I-shaped drum 12 from its left and right ends respectively, allowing the I-shaped drum 12 to rotate freely around its own axis, achieving smooth rotation during the unwinding process. Furthermore, one of the clamps 10 can be adjusted to engage with the other clamp via a telescopic mechanism. The distance of the chuck 10 can accommodate I-shaped drums 12 of different widths, improving the versatility of the device. As needed, the telescopic mechanism includes a threaded sleeve 13 fixed to the outer end of the arm 8. The threaded sleeve 13 provides a threaded mounting base, and a screw is threaded into the sleeve 13. By screwing the screw into or out of the sleeve 13, the horizontal position of the chuck 10 can be changed. The bottom end of the chuck 10 is rotatably mounted on the inner end of the screw, allowing the chuck 10 to move with the screw while rotating freely relative to it, thus allowing it to rotate with the I-shaped drum 12 while clamped. A screw handle 14 is fixed to the outer end of the screw, allowing the operator to quickly and effortlessly adjust the clamping force and clamping width by manually rotating the handle, without the need for additional tools.

[0028] The front middle of the swing frame 6 is rotatably connected to the middle of the rear plate of the back plate 7. This rotatable connection allows the back plate 7 to rotate at a large angle on the swing frame 6, thereby driving the I-shaped drum 12 and the wire rope on it to rotate freely around the horizontal axis to release the torsional stress generated during rope unwinding. The back plate 7 is driven to rotate and position in the plane of the plate by the first motor 5. The power of the first motor 5 is transmitted to the back plate 7 through the transmission component to achieve precise control and locking of the rotation angle of the back plate 7, ensuring responsive rotation under any stress state. Two support rods 2 are symmetrically fixed on both sides of the rear end of the base frame 1. The support rods 2 extend vertically upward to support the two ends of the swing frame 6. Both ends of the swing frame 6 are rotatably connected to the top of the two support rods 2 through the first rotating shaft, so that the swing frame 6 can swing up and down in the vertical plane around the first rotating shaft, thereby adjusting the height of the front end of the flipping frame and the I-shaped drum 12 to accommodate I-shaped drums 12 of different diameters. As needed, the swing frame 6 is configured to include a crossbar and two The vertical rod has a U-shaped structure with its opening facing forward. The two vertical rods extend parallel to each other backward, and the horizontal rod is located on the rear side, forming a stable rectangular frame. The outer ends of the two vertical rods are rotatably connected to two support rods 2, respectively, to realize the overall pitch movement of the swing frame 6 around the horizontal axis. A slewing bearing 16 is provided between the horizontal rod of the swing frame 6 and the back plate 7. The slewing bearing 16 is used to bear the rotational load of the back plate 7 and reduce rotational friction. A frame plate 3 is fixed to the middle of the front side of the horizontal rod of the swing frame 6. The frame plate 3 is used to provide a rigid mounting surface for the slewing bearing 16 and the first motor 5. The slewing bearing 16 includes an inner ring fixed to the frame plate 3 and a toothed outer ring fixed to the back plate 7. The inner ring is rigidly connected to the frame plate 3, and the outer ring is rigidly connected to the back plate 7 and has external teeth. The first motor 5 is mounted on the frame plate 3, and the output shaft of the first motor 5 is coaxially fixed with a drive gear 15 that meshes with the toothed outer ring. When the first motor 5 rotates, the drive gear 15 drives the toothed outer ring and the back plate 7 to rotate together, realizing precise angle control.

[0029] The mounting base 401 and top nut 402 of the screw jack are rotatably connected to the middle of the rear end of the base frame 1 and the middle of the rear side of the swing frame 6 respectively through the second rotating shaft. The mounting base 401 is hinged to the rear of the base frame 1, and the top nut 402 is hinged to the rear of the swing frame 6, so that the screw jack can adaptively adjust the angle during the extension and retraction process to avoid generating additional bending moment. The first rotating shaft and the second rotating shaft are both coaxial with the I-shaped drum 12 and are both horizontal transverse axes to ensure that the swing frame 6 always maintains left and right balance during the lifting and lowering process and avoids tilting. The screw jack 4 is driven and controlled by the second motor. The forward and reverse rotation of the second motor can drive the screw jack to extend or retract, thereby pushing the swing frame 6 to swing up and down around the first rotating shaft to realize stepless adjustment of the height of the I-shaped drum 12. Since the transmission structure of the screw jack 4 is relatively conventional, it will not be described in detail here.

[0030] As required, the wire rope unwinding device for digital explosion-proof cranes also includes a controller, which serves as the core of the device, responsible for receiving sensor signals and outputting execution commands. A torsion detection unit 9 is installed at the front end of the base frame 1 to detect the torsion state of the wire rope. This torsion detection unit 9 can monitor in real time whether the wire rope exhibits abnormal states such as twisting or torsional stress concentration during the unwinding process, and transmits the detection signals to the controller. The controller is connected to the first motor 5, the screw jack 4, and the torsion detection unit 9 respectively. After receiving the torsion direction and intensity signals from the torsion detection unit 9, the controller performs preset logic calculations and outputs drive commands to the first motor 5, causing the back plate 7 and the I-shaped drum 12 to rotate in the opposite direction of torsion, thereby dynamically eliminating stress. Furthermore, the torsion detection unit 9 includes an industrial vision AI camera. This camera captures real-time images of the wire rope unwinding process and uses image processing algorithms to analyze the torsion angle, number of twists, and stress direction of the wire rope, providing the controller with high-precision, visualized torsion state data.

[0031] A method for using a wire rope unwinding device for a digital explosion-proof crane involves first adjusting the lifting height of the screw jack 4 according to the overall diameter of the wire rope wound on the I-shaped drum 12. This ensures that when the I-shaped drum 12 is rotated and clamped between the two clamps 10, a gap is left between the I-shaped drum 12, the wound wire rope, and the base frame 1, meaning it does not touch the base frame 1. This gap prevents the wire rope from directly contacting the base frame 1 or other structural components during unwinding, avoiding frictional damage, and ensuring that the unwound wire rope can be smoothly guided downwards or forwards. During unwinding, the torsion detection unit 9 detects the torsion direction of the wire rope in real time and sends the feedback to the controller. The controller then controls the first drive motor to rotate, which in turn controls the back plate 7 and the I-shaped drum 12 to rotate in the opposite direction of the wire rope's torsion direction (i.e., the release direction corresponding to the torsion direction of the wire rope). This automatically releases the torsional stress of the wire rope, keeping it straight and preventing twisting, knotting, and loosening, thus ensuring the continuity and safety of the unwinding operation.

[0032] Example 2:

[0033] This solution employs an industrial vision AI camera in conjunction with existing image processing and analysis technology to identify the torsional state of released wire ropes. The camera continuously captures images of the wire rope, and image analysis algorithms extract features such as surface texture changes and torsion angles to indirectly determine the direction and magnitude of torsional stress. While it enables real-time stress detection and feedback control, the high cost of industrial cameras, light sources, image processing boards, and other hardware, coupled with the complexity of the algorithms, makes the entire detection unit expensive. Furthermore, it is susceptible to environmental interference from ambient light, dust, and vibration, potentially leading to false or missed identifications. Additionally, the presence of oil, rust, or uneven lighting on the wire rope surface can cause detection errors in the image analysis, affecting the accuracy and response speed of stress release.

[0034] Therefore, as a more reliable and cost-effective alternative, as shown in the attached... Figure 4 and 5 As shown, unlike or based on Embodiment 1, the torsion detection unit 9 includes a housing 901. The housing 901 provides enclosed protection for the internal detection components, preventing external dust and oil from entering, and simultaneously forming a stable detection space. The bottom of the housing 901 is mounted to the front center of the base frame 1 via a connecting rod 11. The connecting rod 11 fixes and supports the housing 901 at an appropriate height in front of the base frame 1, allowing the wire rope to pass through the housing 901 horizontally or slightly at an angle after being released, facilitating detection. The front and rear walls of the housing 901 are each provided with a corresponding wire rope through-hole. The two through-holes are coaxially arranged to ensure that the wire rope passes smoothly along the axis of the housing 901 without additional deflection. Two U-shaped guide wheels 902 are symmetrically installed on both sides of the outer port of the through-hole. The U-shaped guide wheels 902 guide the wire rope in and out of the housing 901, preventing the wire rope from rubbing against the edge of the through-hole, while keeping the wire rope in the center position of the housing 901 and reducing deviation.

[0035] Multiple movable wheel frames 903 are evenly arranged around the steel wire rope inside the housing 901. The movable wheel frames 903 are arranged circumferentially around the steel wire rope. An elastic element is connected between the tail end of the movable wheel frame 903 and the corresponding inner wall of the housing 901. The elastic element can apply an inward preload to the movable wheel frame 903, so that the detection wheel 904 is always in contact with the surface of the steel wire rope. At the same time, it allows the movable wheel frame 903 to move outward with the torsional displacement of the steel wire rope, thereby converting the torsion into the displacement of the detection wheel 904. If necessary, the elastic element is set as a spring 906. The spring 906 has a simple structure, low cost, and reliable reset. The spring 906 has a sliding pin 907 and a sliding sleeve 908. The sliding pin 907 and the sliding sleeve 908 form a pair of precision sliding pairs to constrain the movement direction of the movable wheel frame 903, prevent deflection, and prevent the spring 906 from bending and becoming unstable during compression. The corresponding ends of the sliding column 907 and the sliding sleeve 908 are fixed to the inner walls of the movable wheel frame 903 and the box 901, respectively, so that the movable wheel frame 903 can slide smoothly along the axial direction of the sliding column 907 under the push of the spring 906, always maintaining reliable contact between the detection wheel 904 and the wire rope; the detection wheel 904 is rotatably mounted on the head end of the movable wheel frame 903, and the wheel surface of the detection wheel 904 is in direct contact with the surface of the wire rope. When the wire rope twists, the surface of the wire rope will push the detection wheel 904 to produce radial displacement; the wheel surface of the detection wheel 904 circumferentially abuts against the wire rope, maintaining rolling contact with the wire rope and reducing frictional resistance; an angle encoder 905 is installed on the wheel axle of the detection wheel 904. The angle encoder 905 can convert the slight oscillation of the detection wheel 904 or the rotation angle of the wheel axle into an electrical signal, thereby accurately measuring the degree and direction of the twist of the wire rope inside the box 901;

[0036] Specifically, there are four movable wheel frames 903, which are distributed at 90° intervals around the circumference of the housing 901. They simultaneously detect the torsional state of the wire rope from four directions, achieving all-round perception and avoiding blind spots in single-direction detection. The axles of the sliding column 907 and the U-shaped guide wheel 902 are parallel to the end wall of the housing 901, and the axles of the sliding column 907 and the U-shaped guide wheel 902 have a 45-degree angle. This 45-degree angle design allows the detection wheel 904 to more sensitively capture the torsional displacement components of the wire rope in multiple directions, avoiding detection dead zones caused by orthogonal motion directions, thereby significantly improving the sensitivity and accuracy of torsion detection.

[0037] The parts of this invention not described in detail are prior art. It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalents of the claims within this invention, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A wire rope releasing device for a digital explosion-proof crane, characterized in that: The system includes a base frame, a swing frame, a tilting frame, a screw jack, and an I-shaped drum for winding steel wire rope. The tilting frame includes a back plate and two arms vertically fixed to both ends of the front surface of the back plate. Two clamps for holding both ends of the I-shaped drum are rotatably mounted on the inner side of the outer ends of the two arms, and one of the clamps can be adjusted in distance from the other clamp via a telescopic mechanism. The front middle of the swing frame is rotatably connected to the middle of the rear surface of the back plate and can be driven by a first motor to rotate and position the back plate in the plane of the plate. Two support rods are symmetrically fixed on both sides of the rear end of the base frame. Both ends of the swing frame are rotatably connected to the top of the two support rods via a first rotating shaft. The mounting base and top nut of the screw jack are rotatably connected to the middle of the rear end of the base frame and the middle of the rear side of the swing frame via a second rotating shaft, respectively. Both the first and second rotating shafts are coaxial with the I-shaped drum.

2. The wire rope releasing device for digital explosion-proof cranes according to claim 1, characterized in that: The digital explosion-proof crane wire rope release device also includes a controller. A torsion detection unit for detecting the torsion state of the wire rope is installed at the front end of the base frame. The controller is connected to the first motor, the screw jack and the torsion detection unit respectively.

3. The wire rope releasing device for digital explosion-proof cranes according to claim 2, characterized in that: The torsion detection unit includes a housing. The bottom of the housing is mounted to the center of the front end of the base frame via a connecting rod frame. The center of the front and rear walls of the housing is provided with a rope-passing hole for the corresponding steel wire rope. Two U-shaped guide wheels are symmetrically installed on both sides of the outer port of the rope-passing hole. Multiple movable wheel frames are evenly arranged around the steel wire rope inside the housing. The tail end of the movable wheel frame is connected to the corresponding inner wall of the housing by an elastic element. A detection wheel is rotatably installed at the head end of the movable wheel frame. The wheel surface of the detection wheel circumferentially abuts against the steel wire rope. An angle encoder is installed on the axle of the detection wheel.

4. The wire rope releasing device for digital explosion-proof cranes according to claim 3, characterized in that: The elastic element is a spring, and the spring has a sliding column and a sliding sleeve that are slidably connected. The corresponding ends of the sliding column and the sliding sleeve are respectively fixed to the movable wheel frame and the inner wall of the box.

5. The wire rope releasing device for digital explosion-proof cranes according to claim 4, characterized in that: The movable wheel frame is provided with four wheels. The axles of the sliding column and the U-shaped guide wheel are parallel to the end wall of the box, and the axles of the sliding column and the U-shaped guide wheel have a 45-degree angle.

6. The wire rope releasing device for digital explosion-proof cranes according to claim 2, characterized in that: The torsion detection unit includes an industrial vision AI camera.

7. The wire rope releasing device for digital explosion-proof cranes according to claim 1, characterized in that: The telescopic mechanism includes a threaded sleeve fixed to the outer end of the arm, a screw rod threadedly connected to the threaded sleeve, a corresponding chuck bottom end rotatably mounted on the inner end of the screw rod, and a screw handle fixed to the outer end of the screw rod.

8. The wire rope releasing device for a digital explosion-proof crane according to claim 1, characterized in that: The swing frame is configured as a U-shaped structure including a crossbar and two longitudinal bars. The outer ends of the two longitudinal bars are rotatably connected to two support rods respectively. A slewing bearing is provided between the crossbar of the swing frame and the back plate. A frame plate is fixed to the middle of the front side of the crossbar of the swing frame. The slewing bearing includes an inner ring fixed to the frame plate and a toothed outer ring fixed to the back plate. The first motor is mounted on the frame plate, and the output shaft of the first motor is coaxially fixed with a drive gear that meshes with the toothed outer ring.

9. The wire rope releasing device for a digital explosion-proof crane according to claim 1, characterized in that: The screw jack is driven and controlled by a second motor.

10. A method of using the wire rope release device for a digital explosion-proof crane as described in claim 2, characterized in that: First, adjust the lifting height of the screw jack according to the overall diameter of the wire rope wound on the I-shaped drum, so that when the I-shaped drum is rotated and clamped between the two clamps, there is a gap between the I-shaped drum, the wound wire rope and the base frame, and then the rope can be released. During the rope release process, the torsion detection unit detects the torsion direction of the wire rope and feeds it back to the controller. The controller then controls the first drive motor to rotate, which in turn controls the back plate and the I-shaped drum to rotate in the torsion direction of the wire rope, automatically releasing the torsional stress of the wire rope.

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