Electric anchor windlass with cable tensioning structure and automatic tensioning system

Abstract

The invention provides an electric anchor and mooring equipment with a cable tensioning structure and an automatic tensioning system, and relates to the field of electric anchor and mooring equipment. The device comprises an anchor and mooring machine motor. The anchor chain chain wheel is used for winding an anchor chain; the cable winding roller is used for winding the cable; the tensioning assembly is used for tensioning the cable; the adjusting assembly is used for adjusting the tensioning force; the tensioning assembly comprises a lifting box arranged at the front end of the stranded cable roller; the adjusting assembly comprises a fixed magnet arranged on the surface of the lifting lead screw in a sleeving mode. The movable magnet is arranged above the fixed magnet; and the mounting brackets are rotationally mounted at the two ends of the movable magnet. Through the arranged adjusting assembly, repulsive force between the movable magnet and the fixed magnet is used for replacing a traditional spring to serve as a core buffer element, non-contact thrust is achieved, mechanical abrasion is avoided, meanwhile, the initial distance between the movable magnet and the fixed magnet can be manually adjusted according to the actual situation, and different tension adjusting requirements are met.

Description

Technical Field

[0001] This invention relates to the field of electric anchor winches, specifically an electric anchor winch and automatic tensioning system equipped with a cable tensioning structure. Background Technology

[0002] Electric anchor winches are deck machinery on ships that are powered by electricity and integrate anchor raising and mooring functions. They use electricity to raise and lower the anchor chain and tension the mooring lines, ensuring the safety and stability of the ship when it is anchored or moored at the dock. Tension adjustment can absorb sudden impact forces through elastic buffers (such as using spring devices or constant tension systems) to prevent damage to the lines due to instantaneous overload.

[0003] When a ship is moored, it is subject to external forces such as wind, waves, tides, and currents, causing the cable tension to fluctuate continuously. If the cable tension is too high, the motor needs to output higher torque, which may lead to overload operation, causing the motor to overheat, burn out, or trigger an inverter alarm. Tension adjustment can limit the motor load and extend the equipment's lifespan. If the tension is insufficient, the cable may swing violently due to excessive slack, causing wear and tear due to friction with the dock or other objects.

[0004] Patent CN114852902B discloses an automatic cable tensioning device and method, which includes a cylinder, a mounting frame, and a control system. The cylinder has openings at both ends, and a first end cover and a second end cover are respectively provided at the two ends of the cylinder. A motor is provided on the first end cover, and one end of a first lead screw is provided on the output shaft of the motor. A first slipper and a second slipper are respectively provided inside the cylinder. The other end of the first lead screw passes through the first end cover and the first slipper and is located inside the cylinder. The first slipper is threadedly connected to the first lead screw. A spring is provided between the first slipper and the second slipper. A pressure sensor is provided on the second slipper. One end of a sliding rod is provided on the mounting frame, and the other end of the sliding rod passes through the second end cover and is connected to the second slipper. This device can automatically control the tension of the cable, preventing situations such as cable cutting, slippage, tangling, cable jumping, and cable detachment during the cable winding and unwinding process.

[0005] The above technical solution uses a spring as the core buffer element between the first and second slip shoes. However, the spring is prone to fatigue failure due to long-term compression, and its fixed stiffness leads to insufficient adaptability. Long-term use can cause the spring to crack due to fatigue, affecting normal use. Summary of the Invention

[0006] The purpose of this invention is to provide an electric anchor winch and an automatic tensioning system with a cable tensioning structure, in order to solve the problems mentioned in the background art, which proposes to set a spring as the core buffer element between the first and second slip shoes. However, the spring is prone to fatigue failure due to long-term compression, and the fixed stiffness leads to insufficient adaptability. Long-term use of the spring is also prone to cracking due to fatigue, which affects normal use. This invention overcomes the existing technical defects.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an electric anchor winch and an automatic tensioning system with a cable tensioning structure, including an anchor winch motor; an anchor chain sprocket for winding the anchor chain; a cable winding drum for winding the cable; a tensioning component for tensioning the cable; and an adjusting component for adjusting the tension force. The tensioning assembly includes: a lifting box disposed at the front end of the cable drum; a pressure wheel rotatably installed inside the lifting box; a tensioning wheel disposed below the pressure wheel; a lifting bracket fixed below the lifting box; and a lifting screw rotatably installed inside the lifting bracket via a screw sleeve. The adjustment assembly includes: a fixed magnet sleeved on the surface of the lifting screw; a movable magnet disposed above the fixed magnet; mounting brackets rotatably mounted at both ends of the movable magnet; a lifting slider fixed to the side of the mounting brackets; an adjustment cam rotatably mounted below the lifting slider; a driven sprocket rotatably mounted inside the mounting brackets; and a first limiting hole opened inside the driven sprocket.

[0008] As a further embodiment of the present invention, the adjustment assembly further includes: a transmission chain belt disposed on the surface of the driven sprocket; a driving sprocket disposed inside the transmission chain belt; and a flip knob fixed to the front end of the driving sprocket.

[0009] As a further embodiment of the present invention: the tensioning assembly further includes: a transmission box sleeved on the outside of the lifting bracket, wherein a guide groove with a vertical strip structure is provided at the connection between the transmission box and the flip knob, and a second limiting hole is provided on the left and right sides of the guide groove, and the position and size of the second limiting hole are adapted to the first limiting hole.

[0010] As a further embodiment of the present invention: the second limiting holes are evenly distributed at equal intervals along the surface of the transmission box, and the front end of the adjusting cam is provided with a lifting knob.

[0011] As a further embodiment of the present invention: the top of the lifting slider is provided with a support spring that is fixedly connected to the transmission box, the fixed magnet and the movable magnet are parallel to each other, and the fixed magnet is fixed on the inner side of the lifting bracket.

[0012] As a further embodiment of the present invention, the tensioning assembly further includes: a transmission worm gear fixed to the outside of the bottom end of the lifting screw; a transmission worm gear meshing with one side of the transmission worm gear; and a screw motor fixed to the front end of the transmission worm gear.

[0013] As a further embodiment of the present invention: a purging mechanism is fixed to the front end of the lifting bracket, the purging mechanism comprising: a support frame fixed to the front end of the lifting bracket; a support tube fixed to the front end of the support frame; and a discharge hood with a flared mouth structure fixed to the front end of the support tube.

[0014] As a further embodiment of the present invention, the purging mechanism further includes: a support ring fixed to the outside of the support frame; an air blowing head disposed inside the support ring; and the end of the air blowing head penetrating the support tube.

[0015] As a further embodiment of the present invention, the purging mechanism further includes: an air blowing pipe fixed to one side of the support ring; and a delivery air pump fixed to the end of the air blowing pipe.

[0016] As a further aspect of the present invention: an automatic tensioning system, comprising: a pressure sensor fixed to the top of the lifting bracket; and a PLC controller connected to the output end of the pressure sensor, wherein the electrical output end of the PLC controller is electrically connected to the lead screw motor.

[0017] Compared with the prior art, the beneficial effects of the present invention include: 1. By using the adjustable components, the repulsive force between the movable magnet and the fixed magnet is used to replace the traditional spring as the core buffer element, so as to achieve non-contact thrust and avoid mechanical wear. At the same time, the initial distance between the movable magnet and the fixed magnet can be manually adjusted according to the actual situation to meet different tension adjustment requirements. 2. Through the tensioning assembly, the screw motor can drive the transmission worm to rotate, which in turn drives the transmission worm wheel to rotate, thereby achieving reverse self-locking and maintaining stable cable tension without the need for an additional brake; 3. By using the set flip knob, the flip knob drives the drive sprocket to rotate, which in turn drives the transmission chain belt to rotate. This causes the transmission chain belt to drive the driven sprocket to rotate, which in turn drives the movable magnet to rotate. The movable magnet is flipped, and after the lifting screw rotates, the fixed magnet and the movable magnet attract each other, thereby manually locking the height of the lifting bracket. 4. The purging mechanism can deliver external gas to the blowing head under the action of the air pump, and clean the surface of the cable inside the support pipe through the blowing head. Attached Figure Description

[0018] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1The schematic diagram shows an overall structural schematic diagram according to one embodiment of the present invention; Figure 2 The schematic diagram shows a structural schematic of a lifting support according to an embodiment of the present invention; Figure 3 The schematic diagram shows a bottom view of the lifting support structure according to an embodiment of the present invention; Figure 4 The schematic diagram shows a half-sectional view of a transmission box according to an embodiment of the present invention; Figure 5 The schematic diagram shows a structural schematic of a movable magnet according to an embodiment of the present invention; Figure 6 The schematic diagram shows a structural schematic of a flip knob according to an embodiment of the present invention; Figure 7 The schematic diagram shows a lifting box structure according to an embodiment of the present invention; Figure 8 The diagram illustrates a tensioning system structure according to an embodiment of the present invention.

[0019] Numbered components in the diagram: 1. Anchor winch motor; 2. Anchor chain sprocket; 3. Cable winch drum; 4. Tensioning assembly; 401. Pressure roller; 402. Tensioning roller; 403. Transmission box; 404. Screw motor; 405. Lifting box; 406. Transmission worm gear; 407. Transmission worm wheel; 408. Lifting bracket; 409. Lifting screw; 5. Blowing mechanism; 501. Support frame; 502. Support pipe; 503. Discharge hood; 504. Air blowing pipe; 505. Conveyor... 506. Air pump; 507. Support ring; 508. Air blowing head; 6. Adjustment assembly; 609. Lifting knob; 600. Adjusting cam; 601. Flip knob; 602. Support spring; 603. Lifting slider; 604. Mounting bracket; 605. Movable magnet; 606. Drive chain belt; 607. Driven sprocket; 618. First limiting hole; 619. Drive sprocket; 610. Guide groove; 611. Second limiting hole; 612. Fixed magnet. Detailed Implementation

[0020] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0021] An embodiment of the present invention is illustrated in conjunction with the accompanying drawings.

[0022] Example 1: Please see Figures 1-7 This is the first embodiment of the present invention. This embodiment provides an electric anchor winch with a cable tensioning structure, including an anchor winch motor 1; an anchor chain sprocket 2 for winding the anchor chain; a cable winding drum 3 for winding the cable; a tensioning component 4 for tensioning the cable; and an adjusting component 6 for adjusting the tension force. The tensioning assembly 4 includes: a lifting box 405 disposed at the front end of the cable drum 3; a pressure wheel 401 rotatably installed inside the lifting box 405; a tensioning wheel 402 disposed below the pressure wheel 401; a lifting bracket 408 fixed below the lifting box 405; and a lifting screw 409 rotatably installed inside the lifting bracket 408 via a screw sleeve. The adjusting assembly 6 includes: a fixed magnet 614 sleeved on the surface of the lifting screw 409; a movable magnet 607 disposed above the fixed magnet 614; mounting brackets 606 rotatably mounted at both ends of the movable magnet 607; a lifting slider 605 fixed to the side of the mounting brackets 606; an adjusting cam 602 rotatably mounted below the lifting slider 605; a driven sprocket 609 rotatably mounted inside the mounting brackets 606; and a first limiting hole 610 opened inside the driven sprocket 609.

[0023] It should be noted that the flip knob 603 drives the drive sprocket 611 to rotate, which in turn drives the transmission chain belt 608 to rotate. This causes the transmission chain belt 608 to drive the driven sprocket 609 to rotate, which in turn drives the movable magnet 607 to rotate. The movable magnet 607 is flipped, and after the lifting screw 409 rotates, the fixed magnet 614 and the movable magnet 607 attract each other, thereby manually locking the height of the lifting bracket 408. At the same time, the repulsive force between the movable magnet 607 and the fixed magnet 614 is used to replace the traditional spring as the core buffer element, achieving non-contact thrust and avoiding mechanical wear.

[0024] Furthermore, the adjustment assembly 6 also includes: a drive chain belt 608 disposed on the surface of the driven sprocket 609; a drive sprocket 611 disposed inside the drive chain belt 608; and a flip knob 603 fixed to the front end of the drive sprocket 611.

[0025] It should be noted that the flip knob 603 can drive the drive sprocket 611 to rotate, and the drive sprocket 611 can drive the driven sprocket 609 to rotate through the transmission chain belt 608, thereby driving the movable magnet 607 to rotate and flip the movable magnet 607.

[0026] Furthermore, the tensioning assembly 4 also includes a transmission box 403 sleeved on the outside of the lifting bracket 408. A guide groove 612 with a vertical strip structure is provided at the connection between the transmission box 403 and the flip knob 603. A second limiting hole 613 is also provided on the left and right sides of the guide groove 612, and the position and size of the second limiting hole 613 are adapted to the first limiting hole 610.

[0027] It should be noted that the flip knob 603 can slide within the guide groove 612 to adjust the height of the movable magnet 607. The first limiting hole 610 is adapted to the second limiting hole 613 at different heights, and the height of the movable magnet 607 can be adjusted according to the tension requirements, thereby adjusting the distance between the movable magnet 607 and the fixed magnet 614.

[0028] Furthermore, the second limiting holes 613 are evenly distributed at equal intervals along the surface of the transmission box 403, and the front end of the adjusting cam 602 is provided with a lifting knob 601.

[0029] It should be noted that after the lifting knob 601 is rotated, the lifting slider 605 and the mounting bracket 606 can be raised and lowered by adjusting the cam 602, thereby adjusting the height of the movable magnet 607 inside the mounting bracket 606. The first limiting hole 610 on the driven sprocket 609 at one end of the movable magnet 607 is adjusted to the height of the corresponding second limiting hole 613. The pin is inserted into the first limiting hole 610 and the second limiting hole 613 to lock the position of the movable magnet 607.

[0030] Furthermore, the top of the lifting slider 605 is provided with a support spring 604 that is fixedly connected to the transmission box 403. The fixed magnet 614 and the movable magnet 607 are parallel to each other, and the fixed magnet 614 is fixed to the inside of the lifting bracket 408.

[0031] It should be noted that when the movable magnet 607 moves upward, the mounting bracket 606 compresses the support spring 604 upward, and after the lifting knob 601 is rotated, the mounting bracket 606 can be driven to return to its original position downward under the elastic action of the support spring 604.

[0032] Furthermore, the tensioning assembly 4 also includes: a transmission worm gear 407 fixed to the outside of the bottom end of the lifting screw 409; a transmission worm 406 meshing with one side of the transmission worm gear 407; and a screw motor 404 fixed to the front end of the transmission worm 406.

[0033] It should be noted that the lead screw motor 404 can drive the transmission worm 406 to rotate, thereby driving the transmission worm wheel 407 to rotate through the transmission worm 406, thus achieving reverse self-locking and maintaining the tension stability of the cable without the need for an additional brake.

[0034] In this embodiment, the repulsive force between the movable magnet 607 and the fixed magnet 614 is used to replace the traditional spring as the core buffer element through the adjustment component 6, so as to achieve non-contact thrust and avoid mechanical wear. At the same time, the initial distance between the movable magnet 607 and the fixed magnet 614 can be manually adjusted according to the actual situation to meet different tension adjustment requirements. Through the tensioning component 4, the lead screw motor 404 can drive the transmission worm 406 to rotate, thereby driving the transmission worm wheel 407 to rotate through the transmission worm 406, thus achieving reverse self-locking and maintaining the tension stability of the cable without the need for an additional brake. The rotary knob 603 drives the drive sprocket 611 to rotate, which in turn drives the transmission chain belt 608 to rotate. This causes the driven sprocket 609 to rotate, which in turn drives the movable magnet 607 to rotate. The movable magnet 607 is then flipped. After the lifting screw 409 rotates, the fixed magnet 614 and the movable magnet 607 attract each other, thus manually locking the height of the lifting bracket 408.

[0035] Example 2: Please see Figures 1-2 This is the second embodiment of the present invention, which provides an electric anchor winch with a cable tensioning structure.

[0036] Furthermore, a purging mechanism 5 is fixed to the front end of the lifting bracket 408. The purging mechanism 5 includes: a support frame 501 fixed to the front end of the lifting bracket 408; a support pipe 502 fixed to the front end of the support frame 501; and a discharge hood 503 with a flared structure fixed to the front end of the support pipe 502.

[0037] It should be noted that the funnel-shaped discharge cover 503 facilitates the entry of the cable and can scrape off any debris adhering to the cable. After passing through the inside of the support tube 502, the cable reaches between the pressure wheel 401 and the tension wheel 402 and can be wound onto the cable winding drum 3.

[0038] Furthermore, the purging mechanism 5 also includes: a support ring 506 fixed to the outside of the support frame 501; an air blowing head 507 disposed inside the support ring 506; and the end of the air blowing head 507 penetrating the support tube 502.

[0039] It should be noted that the air blower 507 can use airflow to remove dust from the cable and discharge it outward through the discharge hood 503.

[0040] Furthermore, the purging mechanism 5 also includes: an air blowing pipe 504 fixed to one side of the support ring 506; and a delivery air pump 505 fixed to the end of the air blowing pipe 504.

[0041] It should be noted that the air pump 505 can deliver air to the air blowing pipe 504, and then deliver it to the inside of the support ring 506 through the air blowing pipe 504, and output it through the air blowing head 507.

[0042] In this embodiment, the blowing mechanism 5 can deliver external gas to the blowing head 507 under the action of the air pump 505, and clean the surface of the cable inside the support tube 502 through the blowing head 507.

[0043] Example 3: Please see Figure 8 This is the third embodiment of the present invention. This embodiment provides an automatic tensioning system, including: a pressure sensor fixed to the top of the lifting bracket 408; and a PLC controller connected to the output end of the pressure sensor. The electrical output end of the PLC controller is electrically connected to the lead screw motor 404.

[0044] It should be noted that the pressure sensor is embedded in the top of the fixed magnet 614, located between the movable magnet 607 and the fixed magnet 614. It is used to detect the repulsive force between the movable magnet 607 and the fixed magnet 614. The distance between the movable magnet 607 and the fixed magnet 614 is adjusted according to the required tension, so that the repulsive force between the movable magnet 607 and the fixed magnet 614 matches the required tension. If they do not match, the PLC controller can control the screw motor 404 to work, thereby driving the transmission worm gear 406 to rotate. The transmission worm gear 406 can drive the transmission worm wheel 407 to rotate, causing the lifting screw 409 on the transmission worm wheel 407 to rotate, adjusting the distance between the movable magnet 607 and the fixed magnet 614, and thus adjusting the repulsive force between the movable magnet 607 and the fixed magnet 614.

[0045] In this embodiment, the pressure sensor can monitor the repulsive force between the movable magnet 607 and the fixed magnet 614, and the PLC controller controls the screw motor 404 to drive the lifting screw 409, thereby automatically adjusting the cable tension.

[0046] Working principle: When adjusting the initial distance between the movable magnet 607 and the fixed magnet 614 as needed, the lifting knob 601 can be rotated, thereby driving the adjusting cam 602 to rotate. At this time, the adjusting cam 602 pushes the lifting slider 605 and the mounting bracket 606 upward. The lifting slider 605 and the mounting bracket 606 rise, thereby driving the height of the movable magnet 607 inside the mounting bracket 606 to be adjusted. At this time, the support spring 604 can be compressed inward, and the first limiting hole 610 on the driven sprocket 609 at one end of the movable magnet 607 is adjusted to the height of the corresponding second limiting hole 613. The pin is then inserted into the first limiting hole 613. A first limiting hole 610 and a second limiting hole 613 lock the position of the movable magnet 607. Then, according to the required tension, the lead screw motor 404 is activated. The lead screw motor 404 drives the transmission worm gear 406 to rotate, which in turn drives the transmission worm wheel 407 to rotate. The transmission worm wheel 407 can drive the lifting lead screw 409 to rotate. When the lifting lead screw 409 rotates, it can drive the lifting bracket 408 to move upward, thereby adjusting the distance between the fixed magnet 614 and the movable magnet 607 inside the lifting bracket 408. This adjusts the repulsive force between the fixed magnet 614 and the movable magnet 607, thus reducing the distance between them. The repulsive force between 07 and the tension force are consistent, and the lead screw motor 404 can drive the transmission worm gear 406 to rotate, thereby driving the transmission worm wheel 407 to rotate through the transmission worm gear 406, thus achieving reverse self-locking. This maintains stable cable tension without the need for an additional brake. After the cable enters through the funnel-shaped discharge hood 503, debris adhering to the cable is scraped off. After the cable passes inside the support tube 502, the air pump 505 delivers air to the air blowing pipe 504, which then delivers it to the support ring 506 and outputs it through the air blowing head 507. The air blowing head 507 uses airflow to remove dust from the cable. The material falls and is discharged outward through the discharge hood 503, reaching between the pressure wheel 401 and the tension wheel 402, where it can be wound onto the cable drum 3. Alternatively, if the screw motor 404 malfunctions, the flip knob 603 can be turned. The flip knob 603 drives the drive sprocket 611 to rotate, which in turn drives the transmission chain belt 608 to rotate. This causes the transmission chain belt 608 to drive the driven sprocket 609 to rotate, which in turn drives the movable magnet 607 to rotate. This causes the movable magnet 607 to flip. After the lifting screw 409 rotates, the fixed magnet 614 and the movable magnet 607 attract each other, thereby manually locking the height of the lifting bracket 408. During automatic adjustment, the pressure sensor can monitor the repulsive force between the movable magnet 607 and the fixed magnet 614, and control the screw motor 404 through the PLC controller to drive the lifting screw 409, thereby automatically adjusting the cable tension.

[0047] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. An electric anchor winch equipped with a cable tensioning structure, characterized in that, It includes an anchor winch motor (1); an anchor chain sprocket (2) for winding the anchor chain; a cable winding drum (3) for winding the cable; a tensioning assembly (4) for tensioning the cable; and an adjusting assembly (6) for adjusting the tension. The tensioning assembly (4) includes: a lifting box (405) disposed at the front end of the cable drum (3); a pressure wheel (401) rotatably installed inside the lifting box (405); a tensioning wheel (402) disposed below the pressure wheel (401); a lifting bracket (408) fixed below the lifting box (405); and a lifting screw (409) rotatably installed inside the lifting bracket (408) via a screw sleeve. The adjustment assembly (6) includes: a fixed magnet (614) sleeved on the surface of the lifting screw (409); a movable magnet (607) disposed above the fixed magnet (614); mounting brackets (606) rotatably mounted on both ends of the movable magnet (607); a lifting slider (605) fixed on the side of the mounting bracket (606); an adjustment cam (602) rotatably mounted below the lifting slider (605); a driven sprocket (609) rotatably mounted inside the mounting bracket (606); and a first limiting hole (610) opened inside the driven sprocket (609).

2. An electric anchor winch with a cable tensioning structure according to claim 1, characterized in that, The adjustment assembly (6) further includes: a transmission chain (608) disposed on the surface of the driven sprocket (609); a drive sprocket (611) disposed inside the transmission chain (608); and a flip knob (603) fixed to the front end of the drive sprocket (611).

3. An electric anchor winch with a cable tensioning structure according to claim 2, characterized in that, The tensioning assembly (4) further includes a transmission box (403) sleeved on the outside of the lifting bracket (408). A guide groove (612) with a vertical strip structure is provided at the connection between the transmission box (403) and the flip knob (603). A second limiting hole (613) is also provided on the left and right sides of the guide groove (612), and the position and size of the second limiting hole (613) are adapted to the first limiting hole (610).

4. An electric anchor winch with a cable tensioning structure according to claim 3, characterized in that, The second limiting hole (613) is evenly distributed at equal intervals along the surface of the transmission box (403), and the front end of the adjusting cam (602) is provided with a lifting knob (601).

5. An electric anchor winch with a cable tensioning structure according to claim 4, characterized in that, The top of the lifting slider (605) is provided with a support spring (604) that is fixedly connected to the transmission box (403). The fixed magnet (614) and the movable magnet (607) are parallel to each other, and the fixed magnet (614) is fixed on the inner side of the lifting bracket (408).

6. An electric anchor winch with a cable tensioning structure according to claim 5, characterized in that, The tensioning assembly (4) further includes: a transmission worm gear (407) fixed to the outside of the bottom end of the lifting screw (409); a transmission worm (406) meshing with one side of the transmission worm gear (407); and a screw motor (404) fixed to the front end of the transmission worm (406).

7. An electric anchor winch with a cable tensioning structure according to claim 6, characterized in that, The front end of the lifting bracket (408) is fixed with a purging mechanism (5), which includes: a support frame (501) fixed to the front end of the lifting bracket (408); a support tube (502) fixed to the front end of the support frame (501); and a discharge hood (503) with a flared mouth structure fixed to the front end of the support tube (502).

8. An electric anchor winch with a cable tensioning structure according to claim 7, characterized in that, The purging mechanism (5) further includes: a support ring (506) fixed to the outside of the support frame (501); an air blowing head (507) disposed inside the support ring (506); and the end of the air blowing head (507) penetrating the support tube (502).

9. An electric anchor winch with a cable tensioning structure according to claim 8, characterized in that, The purging mechanism (5) further includes: an air blowing pipe (504) fixed to one side of the support ring (506); and a delivery air pump (505) fixed to the end of the air blowing pipe (504).

10. An automatic tensioning system, applied to an electric anchor winch equipped with a cable tensioning structure as described in claims 1-9, characterized in that, include: A pressure sensor fixed to the top of the lifting bracket (408); And a PLC controller connected to the output of the pressure sensor, wherein the electrical output of the PLC controller is electrically connected to the lead screw motor (404).

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