A tensioning rope arrangement device for tower crane

Abstract

The present invention provides a rope tensioning and arranging device for a tower crane, comprising: a rope-arranging and tensioning mechanism, which allows a steel wire rope for hoisting the tower crane to pass through, and is used to tension the steel wire rope and adjust the lateral position of the steel wire rope; a power unit, which is connected to the steel wire rope and is used to release or tighten the steel wire rope, and comprises a roller for discharging or winding the steel wire rope; the rope-arranging and tensioning mechanism comprises a transverse rope-arranging structure and a tensioning structure, the transverse rope-arranging structure is arranged parallel to the power unit, the tensioning structure is arranged on the transverse rope-arranging structure, the transverse rope-arranging structure is suitable for driving the tensioning structure to move transversely, so that the steel wire rope wound from the power unit remains in a state of extending along the tangential direction of the roller and passes through the tensioning structure; the tensioning structure comprises a driven friction wheel, an active friction wheel and a driving unit arranged side by side, the driving unit is connected to the active friction wheel, and the driving unit drives the active friction wheel to approach the driven friction wheel, and compresses the steel wire rope passing between the driven friction wheel and the active friction wheel.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation, and in particular relates to a rope tensioning device for a tower crane. Background Art

[0002] With the increasing installed capacity of wind turbines and the increasing service life of wind turbines, more and more units require blade replacement. Currently, blade replacement for wind turbines is typically performed using large truck cranes, while large-megawatt high-tower wind turbines require crawler cranes, and offshore wind turbines require outrigger boats. However, the use of large lifting equipment not only incurs high costs but is also subject to environmental constraints.

[0003] Therefore, a tower crane for a wind turbine is needed. The tower crane usually needs to be hoisted onto the nacelle to complete installation and fixation before it can be used. Therefore, it is necessary to provide a tensioning rope device for the tower crane to achieve stable hoisting of the tower crane and ensure normal use of the crane after installation. Summary of the Invention

[0004] The present invention provides a tensioning and rope-laying device for a tower crane, which realizes the tensioning and stable rope-laying of the steel wire rope of the tower crane, cooperates with the lifting equipment to realize the stable lifting of the tower crane, and ensures the normal use of the crane after installation.

[0005] To achieve the above objectives, the present invention provides the following technical solutions.

[0006] A tensioning and arranging rope device for a tower crane, comprising:

[0007] A rope tensioning mechanism allows the steel wire rope of the hoisting tower to pass through, so as to tension the steel wire rope and adjust the lateral position of the steel wire rope;

[0008] A reversing mechanism, allowing the steel wire rope to pass through and adjusting the direction of the steel wire rope;

[0009] a power unit connected to the steel wire rope and used to release or tighten the steel wire rope, including a roller for discharging or winding the steel wire rope;

[0010] The rope tensioning mechanism includes a transverse rope structure and a tensioning structure. The transverse rope structure is arranged in the plane where the power unit is located and is arranged parallel to the power unit. The tensioning structure is arranged on the transverse rope structure. The transverse rope structure is suitable for driving the tensioning structure to move laterally, so that the steel wire rope wound from the power unit remains in a state of extending along the tangential direction of the roller and passes through the tensioning structure.

[0011] The tensioning structure includes a driven friction wheel, an active friction wheel, and a driving unit arranged side by side, the steel wire rope passes between the driven friction wheel and the active friction wheel, the driving unit is connected to the active friction wheel, and the driving unit drives the active friction wheel to approach the driven friction wheel, pressing the steel wire rope against the driven friction wheel to tension the steel wire rope;

[0012] When hoisting the tower crane, one end of the steel wire rope is connected to the boom of the tower crane, and the other end is connected to the power unit through the adjusting pulley group of the tower crane, the main hoisting pulley of the hoisting equipment, the reversing mechanism and the tensioning structure in sequence. The power unit tightens the steel wire rope, the tensioning structure tensions the steel wire rope, and the transverse rope arrangement structure moves in the direction in which the steel wire rope is wound around the roller, so that the steel wire rope is gradually wound and arranged along the tangential direction of the roller.

[0013] Optionally, the tensioning structure also includes a first base, the driven friction wheel is mounted on one end of the first base through a first mounting seat, and the driven friction wheel can rotate in the first mounting seat along with a driven shaft set at the center thereof; the active friction wheel is connected to the driving unit through a second mounting seat and then mounted on the other end of the first base, and the active friction wheel can rotate in the second mounting seat along with the driving shaft set at the center thereof; the driving unit drives the active friction wheel to approach or move away from the driven friction wheel.

[0014] Optionally, a braking structure is provided on both the first mounting seat and the second mounting seat, and the braking structure includes a friction plate that embraces the driven shaft or the driving shaft to provide a resistance torque. The resistance torque is adjusted by adjusting the force with which the friction plate embraces the driven shaft or the driving shaft, thereby adjusting the pre-tightening force applied to the wire rope by the driving friction wheel and the driven friction wheel.

[0015] The friction plate is provided with a notch, and connecting ears are provided at both ends of the notch. Bolts are passed through the connecting ears, and the bolts pass through the two connecting ears, the spring and the locking nut in sequence. The strength with which the friction plate holds the driven shaft or the driving shaft is adjusted by adjusting the depth to which the bolt is screwed into the locking nut.

[0016] Optionally, the bolt is connected to an adjustment motor, and the adjustment motor drives the locking nut to rotate to adjust the depth of the bolt being screwed into the locking nut.

[0017] Optionally, a guide structure is provided on at least one side of the first base, and the guide structure is located laterally between the driven friction wheel and the active friction wheel. The guide structure includes a first guide wheel and a second guide wheel arranged vertically, and the wire rope passes between the first guide wheel and the second guide wheel.

[0018] Optionally, a three-wheel force measuring structure is provided on one side of the first base, and the three-wheel force measuring structure is located laterally between the driven friction wheel and the active friction wheel. The three-wheel force measuring structure includes a force measuring wheel, a first auxiliary wheel and a second auxiliary wheel arranged in a herringbone shape. The force measuring wheel is arranged in a middle position above the first auxiliary wheel and the second auxiliary wheel, and the wire rope passes between the force measuring wheel and the first auxiliary wheel and the second auxiliary wheel. The force measuring wheel is connected to a sensor, and the sensor detects the tension applied to the wire rope.

[0019] Optionally, the transverse rope arrangement structure includes a second base, a transverse motor, a screw and a screw nut, the screw nut is connected to the tensioning structure, the screw nut is arranged on the screw, and the screw is arranged on the second base, the transverse motor drives the screw to rotate, and then drives the tensioning structure to move along the screw with the screw nut; the moving direction and moving speed of the screw nut match the rope collection direction and rope collection speed of the power unit, so that the wire rope is gradually wound and arranged along the tangential direction of the roller.

[0020] Optionally, a reversing sensor is provided in the power unit, and the reversing sensor is triggered when the wire rope is wound around one end of the roller. The reversing sensor gives a reversing signal to the transverse rope-laying structure, and the transverse rope-laying structure switches the moving direction and moves toward the other end of the roller.

[0021] Optionally, the reversing mechanism includes a third base, a reversing frame and a reversing pulley, the reversing pulley is mounted on the reversing frame and can rotate freely in the reversing frame, the reversing frame is hinged to the third base, and the pitch angle of the reversing frame relative to the third base can be freely adjusted.

[0022] Compared with the prior art, the technical solution of the embodiment of the present invention has beneficial effects.

[0023] For example, the present invention provides a rope-laying and tensioning mechanism including a transverse rope-laying structure and a tensioning structure. The tensioning structure will tension the wire rope passing through it and provide a certain pre-tightening force, so as to prevent problems such as rope tangling and rope trapping when the power unit tightens the wire rope. When the crane is working, when the load on the hook is too light to provide the required pre-tightening force, the tensioning mechanism can be used to provide the pre-tightening force of the wire rope. The transverse rope-laying structure drives the tensioning structure to move in the direction of the wire rope winding on the roller, so that the wire rope is gradually wound and arranged along the tangential direction of the roller. When the power unit tightens the wire rope, the wire rope is wound and arranged in order on the roller. This is beneficial to the lifting and normal operation of the crane.

[0024] For another example, the present invention is provided with a braking structure including a friction plate, which can adjust the strength of the friction plate gripping the driven shaft or the driving shaft by adjusting the depth of the locking nut screwed into the locking nut by adjusting the bolt driven by the motor, thereby adjusting the pre-tightening force applied to the wire rope, which is conducive to the orderly loosening and tightening of the wire rope.

[0025] For another example, the present invention sets a force measuring structure on the tensioning structure, and adjusts the pressure applied to the wire rope by the active friction wheel and the driven friction wheel through the tension of the wire rope fed back by the force measuring structure, thereby realizing closed-loop regulation of the wire rope pressure.

[0026] For another example, the present invention provides a reversing sensor in the power unit, and when the wire rope is wound around one end of the roller, the wire rope is automatically reversing and winding, which is beneficial to the orderly tightening of the wire rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 1 is a schematic diagram of the deployment of a tensioning and arranging rope device for a tower crane during the hoisting of the crane according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the installation of a tensioning and arranging rope device for a tower crane during the hoisting of the crane according to an embodiment of the present invention;

[0029] Figure 3 This is a structural diagram of a rope tensioning mechanism according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the disassembled portion of a rope tensioning mechanism according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of a tensioning structure in an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of a partial structure of another tensioning structure after disassembly in an embodiment of the present invention.

[0033] Figure 7 This is a schematic structural diagram of another rope tensioning mechanism according to an embodiment of the present invention;

[0034] Figure 8 This is a structural diagram of another rope tensioning mechanism according to an embodiment of the present invention;

[0035] Figure 9 This is a schematic diagram of the installation of a commutation sensor in an embodiment of the present invention;

[0036] Figure 10 2 is a schematic structural diagram of a reversing mechanism in an embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 1. Tower;

[0039] 2. Engine room;

[0040] 3. Tower crane; 31. Wire rope;

[0041] 4. Rope tensioning mechanism; 41. Transverse rope structure; 411. Second base; 412. Transverse motor; 413. Lead screw; 414. Lead screw nut; 42. Tensioning structure; 421. Driven friction wheel; 4211. First mounting seat; 4212. Driven shaft; 422. Active friction wheel; 4221. Second mounting seat; 4222. Active shaft; 423. Drive unit; 424. First base; 43. Braking structure; 431. Friction plate; 432. Bolt; 433. Spring; 434. Locking nut; 435. Adjustment motor; 44. Guide structure; 441. First guide wheel; 442. Second guide wheel; 45. Three-wheel force measuring structure; 451. Force measuring wheel; 452. First auxiliary wheel; 453. Second auxiliary wheel;

[0042] 5. Reversing mechanism; 51. Third base; 52. Reversing frame; 53. Reversing pulley;

[0043] 6. Power unit; 61. Roller; 62. Reversing sensor;

[0044] 7. Lifting equipment. DETAILED DESCRIPTION

[0045] To make the objectives, features, and beneficial effects of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described below are merely illustrative of the present invention and are not intended to limit the present invention. Furthermore, the same or similar reference numerals may be used in the drawings to refer to the same or similar elements in different embodiments, and descriptions of the same or similar elements in different embodiments, as well as descriptions of prior art elements, features, and effects, may be omitted.

[0046] Reference Figures 1 to 10 , an embodiment of the present invention provides a rope tensioning device for a tower crane.

[0047] Specifically, the tensioning rope device for tower crane includes:

[0048] The rope tensioning mechanism 4 allows the steel wire rope 31 of the hoisting tower crane 3 to pass through, is used to tension the steel wire rope 31 and adjust the lateral position of the steel wire rope 31;

[0049] The reversing mechanism 5 allows the steel wire rope 35 to pass through and is used to adjust the direction of the steel wire rope 35;

[0050] a power unit 6 connected to the steel wire rope 31 and used to release or tighten the steel wire rope 31 , including a roller 61 for discharging or winding the steel wire rope 31 ;

[0051] The rope tensioning mechanism 4 includes a transverse rope structure 41 and a tensioning structure 42. The transverse rope structure 41 is arranged in the plane where the power unit 6 is located and is arranged parallel to the power unit 6. The tensioning structure 42 is arranged on the transverse rope structure 41. The transverse rope structure 41 is suitable for driving the tensioning structure 42 to move laterally, so that the wire rope 31 wound from the power unit 6 remains in a state of extending along the tangential direction of the roller 61 and passes through the tensioning structure 42.

[0052] The tensioning structure 42 includes a driven friction wheel 421, an active friction wheel 422, and a drive unit 423 arranged side by side. The steel wire rope 31 passes between the driven friction wheel 421 and the active friction wheel 422. The drive unit 423 is connected to the active friction wheel 422. The drive unit 423 drives the active friction wheel 422 to approach the driven friction wheel 421, pressing the steel wire rope 35 against the driven friction wheel 421 to tension the steel wire rope 31.

[0053] When hoisting the tower crane 3, one end of the wire rope 31 is connected to the boom of the tower crane 3, and the other end passes through the adjusting pulley group of the tower crane 3, the main hoisting pulley of the hoisting equipment 7, the reversing mechanism 5 and the tensioning structure 42 in sequence to be connected to the power unit 6. The hoisting equipment 7 is arranged on the nacelle 2 at the top of the tower 1. The power unit 6 tightens the wire rope 31, and the tensioning structure 42 tensions the wire rope 31. The transverse rope arrangement structure 41 moves in the direction in which the wire rope 31 is wound on the roller 61, so that the wire rope 31 is gradually wound and arranged along the tangential direction of the roller 61, so that the wire rope 31 is orderly wound and arranged on the roller 61 in sequence.

[0054] In some embodiments, the tensioning structure 42 also includes a first base 424, and the driven friction wheel 421 is installed on one end of the first base 424 through a first mounting seat 4211. The driven friction wheel 421 can rotate in the first mounting seat 4211 along with the driven shaft 4212 set at its center; the active friction wheel 422 is connected to the driving unit 423 through a second mounting seat 4221 and then installed on the other end of the first base 424. The active friction wheel 422 can rotate in the second mounting seat 4221 along with the driving shaft 4222 set at its center; the driving unit 423 drives the active friction wheel 422 to approach or move away from the driven friction wheel 421.

[0055] In some implementations, the driving unit 423 is a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

[0056] In some embodiments, a braking structure 43 is provided on the first mounting seat 4211 and the second mounting seat 4221. The braking structure 43 includes a friction plate 431 that surrounds the driven shaft 4212 or the driving shaft 4222 to provide a resistance torque. The resistance torque is adjusted by adjusting the force with which the friction plate 431 grips the driven shaft 4212 or the driving shaft 4222, thereby adjusting the pre-tightening force applied to the wire rope 31 by the driving friction wheel 422 and the driven friction wheel 421.

[0057] In some embodiments, the friction plate 431 is provided with a notch, and the friction plate 431 is provided with connecting ears at both ends of the notch, and a bolt 432 is passed through the connecting ear, and the bolt 432 passes through the two connecting ears, the spring 433 and the locking nut 434 in sequence. The strength of the friction plate 431 to clamp the driven shaft 4212 or the driving shaft 4222 is adjusted by adjusting the depth of the bolt 432 screwed into the locking nut 434; the depth of the adjusting bolt 432 screwed into the locking nut 434 can be manually adjusted so that the pre-tightening force given to the wire rope 31 by the active friction wheel 422 and the driven friction wheel 421 is the set value.

[0058] In some embodiments, the bolt 432 is connected to an adjustment motor 435, which drives the locking nut 434 to rotate and thereby adjusts the depth of the bolt 432 screwed into the locking nut 434, thereby realizing automatic adjustment of the force with which the friction plate 431 holds the driven shaft 4212 or the driving shaft 4222, and thereby realizing automatic adjustment of the pre-tightening force given to the wire rope 31 by the active friction wheel 422 and the driven friction wheel 421.

[0059] In some embodiments, a guide structure 44 is provided on at least one side of the first base 424. The guide structure 44 is laterally located between the driven friction wheel 421 and the active friction wheel 422. The guide structure 44 includes a first guide wheel 441 and a second guide wheel 442 that are vertically arranged. The wire rope 31 passes between the first guide wheel 441 and the second guide wheel 442 to guide the wire rope 31 and prevent the wire rope 31 from escaping.

[0060] In some embodiments, a three-wheel force measuring structure 45 is provided on one side of the first base 424. The three-wheel force measuring structure 45 is located laterally between the driven friction wheel 421 and the active friction wheel 422. The three-wheel force measuring structure 45 includes a force measuring wheel 451, a first auxiliary wheel 452 and a second auxiliary wheel 453 arranged in a herringbone shape. The force measuring wheel 451 is arranged in the middle position above the first auxiliary wheel 452 and the second auxiliary wheel 453. The wire rope 31 passes between the force measuring wheel 451 and the first auxiliary wheel 452 and the second auxiliary wheel 453. The force measuring wheel 451 is connected to a sensor. The sensor detects the tension applied to the wire rope 31. The pressure applied to the wire rope 31 by the active friction wheel 422 and the driven friction wheel 421 can be adjusted according to the tension applied to the wire rope 31, thereby realizing closed-loop adjustment of the pressure of the wire rope 31. The principle of the three-wheel force measuring structure 45 detecting the tension of the wire rope 31 is existing technology and will not be repeated here.

[0061] In some embodiments, the transverse rope arrangement structure 41 includes a second base 411, a transverse motor 412, a screw 413 and a screw nut 414. The screw nut 414 is connected to the first base 424 of the tensioning structure 42. The screw nut 414 is arranged on the screw 413, and the screw 413 is arranged on the second base 411. The transverse motor 412 drives the screw 413 to rotate, thereby driving the tensioning structure 42 to move along the screw 413 with the screw nut 414; the moving direction and moving speed of the screw nut 414 match the rope collection direction and rope collection speed of the power unit 6, so that the wire rope 31 is gradually wound and arranged along the tangential direction of the roller 61.

[0062] In a specific implementation, the transmission structure of the lead screw 413 and the lead screw nut 414 of the transverse rope structure 41 can be replaced with a transmission method such as a pulley or chain, which can drive the tensioning structure 42 to move laterally and the moving direction and speed can be adjusted.

[0063] In some embodiments, a reversing sensor 62 is provided in the power unit 6. When the wire rope 31 is wound around one end of the roller 61, the reversing sensor 62 is triggered. The reversing sensor 62 gives a reversing signal to the transverse rope structure 41. The transverse rope structure 41 switches the moving direction and moves toward the other end of the roller 61.

[0064] In some embodiments, the reversing mechanism 5 includes a third base 51, a reversing frame 52 and a reversing pulley 53. The reversing pulley 53 is installed on the reversing frame 52 and can rotate freely in the reversing frame 52. The reversing frame 52 is hinged to the third base 51. The pitch angle of the reversing frame 52 relative to the third base 51 can be freely adjusted. During the process of hoisting the crane 3, the reversing frame 52 is automatically adjusted as the hoisting height of the crane 3 changes.

[0065] To sum up, the present invention sets up a rope tensioning mechanism 4 including a transverse rope-laying structure 41 and a tensioning structure 42. The tensioning structure 42 tensions the wire rope 31 passing through it and provides a certain pre-tightening force, so as to prevent problems such as rope tangling and rope trapping when the power unit 6 tightens the wire rope 31. When the crane 3 is working and the load on the hook is light and insufficient to provide the required pre-tightening force, the pre-tightening force of the wire rope 31 can be provided by the tensioning mechanism. The transverse rope-laying structure 41 drives the tensioning structure 42 to move in the direction in which the wire rope 31 is wound on the roller 61, so that the wire rope 31 is gradually wound and arranged along the tangential direction of the roller 61. When the power unit 6 tightens the wire rope 31, the wire rope 31 is wound and arranged in order on the roller 61. This is beneficial to the lifting and normal operation of the crane 3.

[0066] Furthermore, the present invention is provided with a braking structure 43 including a friction plate 431, which can adjust the strength of the friction plate 431 to grip the driven shaft 4212 or the driving shaft 4222 by adjusting the depth of the adjusting bolt 432 screwed into the locking nut 434 by driving the locking nut 434 driven by the adjusting motor 435, thereby adjusting the pre-tightening force applied to the wire rope 31, which is conducive to the orderly relaxation and tightening of the wire rope 31.

[0067] Furthermore, the present invention sets a force measuring structure on the tensioning structure 42, and adjusts the pressure applied to the wire rope 31 by the active friction wheel 422 and the driven friction wheel 421 through the tension of the wire rope 31 fed back by the force measuring structure, thereby realizing closed-loop regulation of the pressure of the wire rope 31.

[0068] Furthermore, the present invention provides a reversing sensor 62 in the power unit 6 , so that when the wire rope 31 is wound around one end of the roller 61 , the wire rope 31 is automatically reversed and wound, which is beneficial to the orderly tightening of the wire rope 31 .

[0069] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when only a single embodiment is described with respect to specific features. The feature examples provided in the present disclosure are intended to be illustrative, not limiting, unless otherwise stated. In specific implementations, the technical features of one or more dependent claims may be combined with the technical features of the independent claims, depending on actual needs and where technically feasible, and the technical features from the corresponding independent claims may be combined in any appropriate manner rather than solely through the specific combinations listed in the claims.

Claims

1. A tensioning rope arrangement device for a tower crane, characterized in that: include: A rope tensioning mechanism allows the steel wire rope of the hoisting tower to pass through, so as to tension the steel wire rope and adjust the lateral position of the steel wire rope; A reversing mechanism, allowing the steel wire rope to pass through and adjusting the direction of the steel wire rope; a power unit connected to the steel wire rope and used to release or tighten the steel wire rope, including a roller for discharging or winding the steel wire rope; The rope tensioning mechanism includes a transverse rope structure and a tensioning structure. The transverse rope structure is arranged in the plane where the power unit is located and is arranged parallel to the power unit. The tensioning structure is arranged on the transverse rope structure. The transverse rope structure is suitable for driving the tensioning structure to move laterally, so that the steel wire rope wound from the power unit remains in a state of extending along the tangential direction of the roller and passes through the tensioning structure. The tensioning structure includes a driven friction wheel, an active friction wheel, and a driving unit arranged side by side, the steel wire rope passes between the driven friction wheel and the active friction wheel, the driving unit is connected to the active friction wheel, and the driving unit drives the active friction wheel to approach the driven friction wheel, pressing the steel wire rope against the driven friction wheel to tension the steel wire rope; When hoisting the tower crane, one end of the steel wire rope is connected to the boom of the tower crane, and the other end is connected to the power unit through the adjusting pulley group of the tower crane, the main hoisting pulley of the hoisting equipment, the reversing mechanism and the tensioning structure in sequence. The power unit tightens the steel wire rope, the tensioning structure tensions the steel wire rope, and the transverse rope arrangement structure moves in the direction in which the steel wire rope is wound around the roller, so that the steel wire rope is gradually wound and arranged along the tangential direction of the roller.

2. The rope tensioning device for a tower crane according to claim 1, characterized in that: The tensioning structure also includes a first base, the driven friction wheel is mounted on one end of the first base through a first mounting seat, and the driven friction wheel can rotate in the first mounting seat along with a driven shaft set at the center thereof; the active friction wheel is connected to the driving unit through a second mounting seat and then mounted on the other end of the first base, and the active friction wheel can rotate in the second mounting seat along with a driving shaft set at the center thereof; the driving unit drives the active friction wheel to approach or move away from the driven friction wheel.

3. The rope tensioning device for a tower crane according to claim 2, characterized in that: A braking structure is provided on both the first mounting seat and the second mounting seat. The braking structure includes a friction plate that embraces the driven shaft or the driving shaft to provide a resistance torque. The resistance torque is adjusted by adjusting the force with which the friction plate embraces the driven shaft or the driving shaft, thereby adjusting the pre-tightening force applied to the wire rope by the driving friction wheel and the driven friction wheel.

4. The rope tensioning device for a tower crane according to claim 3, characterized in that: The friction plate is provided with a notch, and connecting ears are provided at both ends of the notch. Bolts are passed through the connecting ears, and the bolts pass through the two connecting ears, the spring and the locking nut in sequence. The strength with which the friction plate holds the driven shaft or the driving shaft is adjusted by adjusting the depth to which the bolt is screwed into the locking nut.

5. The rope tensioning device for a tower crane according to claim 4, characterized in that: The bolt is connected to an adjustment motor, and the adjustment motor drives the locking nut to rotate so as to adjust the depth of the bolt being screwed into the locking nut.

6. The rope tensioning device for a tower crane according to claim 2, characterized in that: A guide structure is provided on at least one side of the first base, and the guide structure is located laterally between the driven friction wheel and the active friction wheel. The guide structure includes a first guide wheel and a second guide wheel arranged vertically, and the wire rope passes between the first guide wheel and the second guide wheel.

7. The rope tensioning device for a tower crane according to claim 2, characterized in that: A three-wheel force measuring structure is provided on one side of the first base. The three-wheel force measuring structure is located laterally between the driven friction wheel and the active friction wheel. The three-wheel force measuring structure includes a force measuring wheel, a first auxiliary wheel and a second auxiliary wheel arranged in a herringbone shape. The force measuring wheel is provided in a middle position above the first auxiliary wheel and the second auxiliary wheel. The wire rope passes between the force measuring wheel and the first auxiliary wheel and the second auxiliary wheel. The force measuring wheel is connected to a sensor, and the sensor detects the tension applied to the wire rope.

8. The rope tensioning device for a tower crane according to claim 1, characterized in that: The transverse rope arrangement structure includes a second base, a transverse motor, a screw and a screw nut. The screw nut is connected to the tensioning structure. The screw nut is arranged on the screw, and the screw is arranged on the second base. The transverse motor drives the screw to rotate, and then drives the tensioning structure to move along the screw with the screw nut; the moving direction and moving speed of the screw nut match the rope collection direction and rope collection speed of the power unit, so that the wire rope is gradually wound and arranged along the tangential direction of the roller.

9. The rope tensioning device for a tower crane according to claim 1, characterized in that: A reversing sensor is provided in the power unit. When the steel wire rope is wound around one end of the roller, the reversing sensor is triggered. The reversing sensor sends a reversing signal to the transverse rope-laying structure. The transverse rope-laying structure switches the moving direction and moves toward the other end of the roller.

10. The rope tensioning device for a tower crane according to claim 1, characterized in that: The reversing mechanism includes a third base, a reversing frame and a reversing pulley. The reversing pulley is installed on the reversing frame and can rotate freely in the reversing frame. The reversing frame is hinged to the third base, and the pitch angle of the reversing frame relative to the third base can be freely adjusted.

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