Marine crane hook cleaning device

Abstract

The present invention discloses a hook cleaning device for a marine crane, comprising a fixed cylinder and a rotating cylinder installed in a telescopic arm, a brush is provided on the inner side wall of the rotating cylinder, a small-diameter coil spring and a large-diameter coil spring are provided in the fixed cylinder, the front end of the small-diameter coil spring is fixedly connected to a movable plate, and the rear end is fixedly connected to the rotating cylinder, and the large-diameter coil spring is located between the movable plate and the rotating cylinder; the movable plate is provided with a slider, the slider cooperates with a spiral groove on the inner wall of the fixed cylinder, a rope connected to the hook passes through the fixed cylinder and the rotating cylinder, the inner diameter of the small-diameter coil spring when stretched is equal to or less than the outer diameter of the rope, and the inner diameter when contracted is greater than the outer diameter of the rope. The small-diameter coil spring repeatedly expands and contracts as the rope is wound, the movable plate repeatedly moves back and forth, driving the rotating cylinder to rotate in both directions, and the brush cleans the rope passing through the rotating cylinder. The present invention can clean the rope and avoid seawater residue on the rope as much as possible.

Description

Technical Field

[0001] The invention relates to lifting equipment, in particular to a ship crane. Background Art

[0002] Marine cranes are special cranes that perform transportation operations in the marine environment. They are mainly used for important tasks such as the transportation and transfer of cargo between ships, marine replenishment, and the deployment and recovery of underwater operating equipment. Due to the special geographical environment at sea, the ship must always face the swaying of the waves. After each use of the crane, the hook needs to be retracted in time. Seawater is corrosive. When retracting the hook, the rope connected to the hook needs to be cleaned to avoid seawater residue on the rope, or to avoid seawater from entering the crane. Summary of the invention

[0003] The technical problem solved by the present invention is: how to clean the rope connected to the hook while retracting the hook of the ship crane to avoid seawater remaining on the rope as much as possible, or to avoid seawater entering the interior of the crane as much as possible.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a marine crane hook cleaning device, comprising a fixed cylinder installed in a telescopic arm, a rotating cylinder pivotally connected to the telescopic arm, a brush is provided on the inner wall of the rotating cylinder, a small-diameter coil spring and a large-diameter coil spring are provided in the fixed cylinder, the front end of the small-diameter coil spring is fixedly connected to a movable plate, the rear end of the small-diameter coil spring is fixedly connected to the rotating cylinder, and the large-diameter coil spring is located between the movable plate and the rotating cylinder; a slider is provided on the outer edge of the movable plate, the slider cooperates with a spiral groove, and the spiral groove is provided on the inner wall of the fixed cylinder; a rope connected to the hook passes through the fixed cylinder and the rotating cylinder, the inner diameter of the small-diameter coil spring when stretched is equal to or less than the outer diameter of the rope, and the inner diameter of the small-diameter coil spring when contracted is greater than the outer diameter of the rope.

[0005] When the hook is retracted, the winch is activated to reel in the rope, and the rope passes through the small-diameter coil spring in the fixed tube. Since the inner diameter of the small-diameter coil spring when stretched is equal to or smaller than the outer diameter of the rope, when the winch reels in the rope, the rope uses friction to drive the small-diameter coil spring to shrink the small-diameter coil spring. The small-diameter coil spring drives the movable plate to move backward, and the movable plate compresses the large-diameter coil spring, and the large-diameter coil spring accumulates elastic potential energy. As the small-diameter coil spring shrinks, the inner diameter of the small-diameter coil spring becomes larger and larger than the outer diameter of the rope. Under the elastic force of the large-diameter coil spring, the movable plate moves forward, the small-diameter coil spring stretches, the inner diameter of the small-diameter coil spring becomes smaller, and it contacts with the rope by friction, and is set around the outer periphery of the rope. The backward movement of the rope drives the small-diameter threaded spring to contract, and the movable plate moves backward. After the inner diameter of the small-diameter coil spring becomes larger than the outer diameter of the rope, under the elastic force of the large-diameter coil spring, the small-diameter coil spring stretches, the movable plate moves forward, the inner diameter of the small-diameter coil spring becomes smaller, and it contacts with the rope by friction, and is set around the outer periphery of the rope. This is repeated, the small diameter coil spring repeatedly contracts and stretches, and the movable plate repeatedly moves backward and forward.

[0006] The movable plate moves backward, and the slider on it moves along the spiral path along the spiral groove. Since the fixed cylinder is fixedly arranged, the movable plate rotates forward relative to the fixed cylinder, and the movable plate drives the small-diameter spiral spring to rotate forward, and the small-diameter spiral spring drives the rotating cylinder to rotate forward, and the brush on the inner wall of the rotating cylinder cleans the rope passing through the rotating cylinder. The movable plate moves forward, and the slider on it moves along the spiral path along the spiral groove. The movable plate rotates reversely relative to the fixed cylinder, and the movable plate drives the small-diameter spiral spring to rotate reversely, and the small-diameter spiral spring drives the rotating cylinder to rotate reversely, and the brush on the inner wall of the rotating cylinder cleans the rope passing through the rotating cylinder. In this way, as the movable plate repeatedly moves forward and backward, the rotating cylinder repeatedly rotates forward and reverse, and the brush on the inner wall of the rotating cylinder cleans the rope passing through the rotating cylinder.

[0007] The present invention can clean the rope connected to the hook, and avoid seawater remaining on the rope as much as possible, or avoid seawater entering the interior of the crane as much as possible.

[0008] The front end of the rotating cylinder is pivotally connected to the fixed cylinder through the front end bearing, the rear end of the rotating cylinder is pivotally connected to the telescopic arm through the rear end bearing, and the rear end of the small diameter coil spring is fixedly connected to the front end of the rotating cylinder. The rear end of the fixed cylinder is provided with a fixed cylinder rear end plate, which is fixedly connected to the fixed cylinder body through a spiral connector. The fixed cylinder rear end plate and the fixed cylinder front end plate are tightly matched with the inner side wall of the telescopic arm.

[0009] The front end plate of the rotating cylinder is fixedly connected to the main body of the rotating cylinder through a spiral connector, and the front end plate of the rotating cylinder is pivotally connected to the rear end plate of the fixed cylinder through a front end bearing. The rear end plate of the rotating cylinder is pivotally connected to the auxiliary plate through a rear end bearing, and the auxiliary plate is tightly matched with the inner side wall of the telescopic arm.

[0010] The number of spiral grooves on the inner wall of the fixed cylinder is the same as the number of sliders, and the sliders are distributed along the circumference of the movable plate. The movable plate is in a disc shape, and a central hole is provided on the movable plate for the rope to pass through. The front end of the small diameter spiral spring is welded to the movable plate.

[0011] The rotating drum has a drain hole on the side wall, the fixed drum has a drain hole on the side wall, and the telescopic arm has a rope hole on the side wall. The telescopic arm is tilted forward. The seawater and impurities coming down the rope flow through the drain hole of the rotating drum and the drain hole of the fixed drum to the rope hole, and then are discharged from the telescopic arm through the rope hole.

[0012] A guide disc is installed at the front end of the fixed cylinder, and a guide hole is opened in the center of the guide disc. The rope passes through the guide hole, and the guide hole guides the rope so that the rope entering the fixed cylinder can pass through the small-diameter spiral spring.

[0013] The telescopic arm is matched with the fixed arm. A reset spring is provided in the fixed arm. The reset spring is against the rear end of the telescopic arm. A limit bolt is installed on the fixed arm. A limit groove is provided on the side wall of the telescopic arm. The limit bolt cooperates with the limit groove. The fixed arm is fixedly connected to the storage box, and the winch is arranged in the storage box. A rear guide wheel is provided in the storage box, and a front guide wheel is provided at the front end of the telescopic arm. The front guide wheel is located above the rope hole. The rope enters the telescopic arm through the rope hole, and enters the fixed cylinder after being guided by the front guide wheel. The rope passes through the telescopic arm and then passes through the fixed arm, and then enters the storage box. The rope is guided by the rear guide wheel and then wound by the winch.

[0014] A limit block is provided at the connection between the rope and the hook. During the rope storage process, when the limit block contacts the rope hole, the winch continues to move, pulling and reeling the rope, and the rope pulls the telescopic arm backward, the telescopic arm compresses the reset spring, and the telescopic arm retracts into the fixed arm. When releasing the hook, the winch releases the rope, and under the elastic force of the reset spring, the telescopic arm extends out of the fixed arm. After the telescopic arm is fully extended out of the fixed arm, the limit block begins to drop, and the hook begins to drop.

[0015] When the telescopic arm is extended and retracted relative to the fixed support arm, the limit bolt slides in the limit groove, and when the limit bolt abuts against the rear end of the limit groove, the telescopic arm is completely extended out of the support arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the external structure of a marine crane;

[0018] Figure 2 This is a schematic diagram of the internal structure of a marine crane;

[0019] Figure 3 for Figure 2A schematic diagram of a hook cleaning device 200 for a marine crane;

[0020] Figure 4 It is a schematic diagram of the rope 51 passing through the marine crane hook cleaning device 200;

[0021] Figure 5 for Figure 4 Schematic diagram of the middle rope 51 being pulled and the small diameter coil spring 41 being compressed.

[0022] Explanation of symbols in the figure:

[0023] 10. Telescopic arm; 11. Rope hole; 12. Limiting groove;

[0024] 200. Marine crane hook cleaning device;

[0025] 20. Fixed cylinder; 21. Spiral groove; 22. Drain hole of fixed cylinder; 23. Guide plate; 24. Guide hole; 25. Rear end plate of fixed cylinder; 26. Front end plate of fixed cylinder;

[0026] 30. Rotating drum; 31. Brush; 32. Brush plate; 33. Front bearing; 34. Rear bearing; 35. Drain hole of rotating drum; 36. Front plate of rotating drum; 37. Rear plate of rotating drum; 38. Auxiliary plate;

[0027] 41. Small diameter coil spring; 42. Large diameter coil spring; 43. Movable plate; 44. Slider;

[0028] 50. Hook; 51. Rope; 52. Limit block;

[0029] 60. Fixed support arm; 61. Return spring; 62. Limit bolt; 63. Bracket;

[0030] 70. Winch; 71. Storage box; 72. Rear guide wheel; 73. Front guide wheel. DETAILED DESCRIPTION

[0031] Combination Figures 1 to 4 The invention discloses a hook cleaning device for a marine crane, comprising a fixed cylinder 20 installed in a telescopic arm 10, a rotating cylinder 30 pivotally connected in the telescopic arm, a brush 31 being arranged on the inner side wall of the rotating cylinder, a small-diameter coil spring 41 and a large-diameter coil spring 42 being arranged in the fixed cylinder, the front end of the small-diameter coil spring being fixedly connected to a movable plate 43, the rear end of the small-diameter coil spring being fixedly connected to the rotating cylinder, and the large-diameter coil spring being located between the movable plate and the rotating cylinder; a slider 44 being arranged on the outer edge of the movable plate, the slider being matched with a spiral groove 21, and the spiral groove being arranged on the inner side wall of the fixed cylinder; a rope 51 connected to a hook 50 passing through the fixed cylinder and the rotating cylinder, the inner diameter of the small-diameter coil spring when stretched is equal to or smaller than the outer diameter of the rope, and the inner diameter of the small-diameter coil spring when contracted is larger than the outer diameter of the rope.

[0032] refer to Figures 2 to 5 When the hook 50 is retracted, the winch 70 is activated to reel in the rope 51, and the rope passes through the small-diameter coil spring 41 in the fixed tube 20. Since the inner diameter of the small-diameter coil spring when stretched is equal to or smaller than the outer diameter of the rope 51, when the winch 70 reels in the rope, the rope 51 drives the small-diameter coil spring 41 by friction, causing the small-diameter coil spring to contract. The small-diameter coil spring drives the movable plate 43 to move backward, and the movable plate compresses the large-diameter coil spring 42, and the large-diameter coil spring accumulates elastic potential energy. As the small-diameter coil spring 41 contracts, the inner diameter of the small-diameter coil spring becomes larger and larger than the outer diameter of the rope 51. Under the elastic force of the large-diameter coil spring 42, the movable plate 43 moves forward, the small-diameter coil spring 41 stretches, and the inner diameter of the small-diameter coil spring becomes smaller, and it contacts with the rope 51 by friction, and is sleeved on the outer periphery of the rope. The backward movement of the rope drives the small-diameter spiral spring 41 to contract, and the movable plate 43 to move backward. After the inner diameter of the small-diameter spiral spring increases to be larger than the outer diameter of the rope 51, the small-diameter spiral spring 41 stretches under the elastic force of the large-diameter spiral spring 42, and the movable plate 43 moves forward. The inner diameter of the small-diameter spiral spring decreases, and it contacts with the rope 51 by friction, and is set on the outer periphery of the rope. In this way, the small-diameter spiral spring 41 repeatedly contracts and stretches, and the movable plate 43 repeatedly moves backward and forward.

[0033] The movable plate 43 moves backward, and the slider 44 thereon moves along the spiral path along the spiral groove 21. Since the fixed cylinder 20 is fixedly arranged, the movable plate 43 rotates forward relative to the fixed cylinder 20, and the movable plate drives the small-diameter spiral spring 41 to rotate forward, and the small-diameter spiral spring drives the rotating cylinder 30 to rotate forward, and the brush 31 on the inner wall of the rotating cylinder cleans the rope 51 passing through the rotating cylinder. The movable plate 43 moves forward, and the slider 44 thereon moves along the spiral path along the spiral groove 21. The movable plate 43 rotates in the opposite direction relative to the fixed cylinder 20, and the movable plate drives the small-diameter spiral spring 41 to rotate in the opposite direction, and the small-diameter spiral spring drives the rotating cylinder 30 to rotate in the opposite direction, and the brush 31 on the inner wall of the rotating cylinder cleans the rope passing through the rotating cylinder 30. In this way, as the movable plate 43 repeatedly moves forward and backward, the rotating cylinder 30 repeatedly rotates forward and reversely, and the brush 31 on the inner wall of the rotating cylinder cleans the rope 51 passing through the rotating cylinder.

[0034] like Figure 3 The brush 31 is arranged on a brush plate 32, and the brush plate is mounted on the inner wall of the rotating cylinder 30 through a threaded connector.

[0035] The front end of the rotating cylinder 30 is pivotally connected to the fixed cylinder 20 via the front end bearing 33, the rear end of the rotating cylinder is pivotally connected to the telescopic arm 10 via the rear end bearing 34, and the rear end of the small diameter coil spring 41 is fixedly connected to the front end of the rotating cylinder.

[0036] The rear end of the fixed cylinder 20 is provided with a fixed cylinder rear end plate 25, which is fixedly connected to the fixed cylinder body through a screw connector. The fixed cylinder rear end plate 25 and the fixed cylinder front end plate 26 are closely matched with the inner side wall of the telescopic arm 10.

[0037] The front end plate 36 of the rotating cylinder is fixedly connected to the main body of the rotating cylinder through a spiral connector, and the front end plate of the rotating cylinder is pivotally connected to the rear end plate 25 of the fixed cylinder through a front end bearing 33. The rear end plate 37 of the rotating cylinder is pivotally connected to the auxiliary plate 38 through a rear end bearing 34, and the auxiliary plate is tightly matched with the inner side wall of the telescopic arm.

[0038] The number of spiral grooves 21 on the inner wall of the fixed cylinder 20 is the same as the number of sliders 44, and the sliders are distributed along the circumference of the movable plate 43. The movable plate 43 is in a disc shape, and a central hole is provided in the movable plate for the rope 51 to pass through. The front end of the small diameter spiral spring 41 is welded to the movable plate 43.

[0039] The rotating drum 30 has a rotating drum drain hole 35 on its side wall, the fixed drum 20 has a fixed drum drain hole 22 on its side wall, and the telescopic arm 10 has a rope hole 11 on its side wall. The telescopic arm is tilted forward. The seawater and impurities coming down the rope 51 flow through the rotating drum drain hole 35 and the fixed drum drain hole 22 to the rope hole 11, and then are discharged from the telescopic arm 10 through the rope hole.

[0040] A guide plate 23 is installed at the front end of the fixed cylinder 20, and a guide hole 24 is provided in the center of the guide plate. The rope 51 passes through the guide hole 24, and the guide hole guides the rope 51 so that the rope entering the fixed cylinder 20 can pass through the small-diameter coil spring 41.

[0041] The telescopic arm 10 is matched in the fixed arm 60, and a return spring 61 is provided in the fixed arm. The return spring is against the rear end of the telescopic arm. A limit bolt 62 is installed on the fixed arm. A limit groove 12 is opened on the side wall of the telescopic arm, and the limit bolt cooperates with the limit groove.

[0042] refer to Figure 1 , Figure 2 , the fixed arm 60 is fixedly connected to the storage box 71, and the winch 70 is arranged in the storage box. A rear guide wheel 72 is arranged in the storage box, and a front guide wheel 73 is arranged at the front end of the telescopic arm 10. The front guide wheel is located above the rope hole 11, and the rope 51 enters the telescopic arm 10 through the rope hole, and enters the fixed cylinder 20 after being guided by the front guide wheel 73. After passing through the telescopic arm 10, the rope passes through the fixed arm 60 and then enters the storage box 71. The rope 51 is guided by the rear guide wheel 72 and then wound by the winch 70.

[0043] A stopper 52 is provided at the connection between the rope 51 and the hook 50. During the rope storage process, when the stopper abuts against the rope hole 11, the winch 70 continues to move, pulling and reeling the rope 51, and the rope pulls the telescopic arm 10 to move backward, and the telescopic arm compresses the return spring 61, and the telescopic arm 10 retracts into the fixed arm 60. When releasing the hook 50, the winch releases the rope 51, and under the elastic force of the return spring 61, the telescopic arm 10 extends out of the fixed arm 60. After the telescopic arm is fully extended out of the fixed arm, the stopper 52 begins to descend, and the hook 50 begins to descend.

[0044] When the telescopic arm 10 is extended and retracted relative to the fixed arm 60 , the limiting bolt 62 slides in the limiting groove 12 . When the limiting bolt abuts against the rear end of the limiting groove, the telescopic arm 10 is completely extended out of the fixed arm 60 .

[0045] The fixed support arm 60 is supported by a bracket 63, and the bracket and the storage box 71 are fixedly mounted on the hull bracket structure.

[0046] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A hook cleaning device for a marine crane, comprising a fixed cylinder (20) installed in a telescopic arm (10), a rotating cylinder (30) pivotally connected to the telescopic arm, a brush (31) being arranged on the inner side wall of the rotating cylinder, and characterized in that: A small-diameter coil spring (41) and a large-diameter coil spring (42) are arranged in the fixed cylinder, the front end of the small-diameter coil spring is fixedly connected to the movable plate (43), the rear end of the small-diameter coil spring is fixedly connected to the rotating cylinder, and the large-diameter coil spring is located between the movable plate and the rotating cylinder; a slider (44) is arranged on the outer edge of the movable plate, the slider cooperates with the spiral groove (21), and the spiral groove is arranged on the inner side wall of the fixed cylinder; a rope (51) connected to the hook (50) passes through the fixed cylinder and the rotating cylinder, the inner diameter of the small-diameter coil spring when stretched is equal to or smaller than the outer diameter of the rope, and the inner diameter of the small-diameter coil spring when contracted is larger than the outer diameter of the rope.

2. The marine crane hook cleaning device according to claim 1, characterized in that: The front end of the rotating cylinder (30) is pivotally connected to the fixed cylinder (20) via a front end bearing (33), the rear end of the rotating cylinder is pivotally connected to the telescopic arm (10) via a rear end bearing (34), and the rear end of the small diameter coil spring (41) is fixedly connected to the front end of the rotating cylinder.

3. The marine crane hook cleaning device according to claim 1, characterized in that: The number of the spiral grooves (21) on the inner side wall of the fixed cylinder (20) is the same as the number of the sliders (44), and the sliders are distributed along the circumference of the movable plate (43).

4. The marine crane hook cleaning device according to claim 1, characterized in that: A rotating cylinder drainage hole (35) is provided on the side wall of the rotating cylinder (30), a fixed cylinder drainage hole (22) is provided on the side wall of the fixed cylinder (20), a rope hole (11) is provided on the side wall of the telescopic arm (10), and the telescopic arm is arranged to be tilted forward.

5. The marine crane hook cleaning device according to claim 1, characterized in that: A guide plate (23) is installed at the front end of the fixed cylinder (20), and a guide hole (24) is provided at the center of the guide plate.

6. The marine crane hook cleaning device according to claim 1, characterized in that: The telescopic arm (10) is matched in the fixed arm (60), a return spring (61) is arranged in the fixed arm, the return spring is against the rear end of the telescopic arm, a limit bolt (62) is installed on the fixed arm, a limit groove (12) is arranged on the side wall of the telescopic arm, and the limit bolt is matched with the limit groove.

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