A type of crane basket for offshore platforms.

Abstract

This application relates to the field of maritime transport and lifting, and in particular to a launching and retracting basket for an offshore platform crane. The basket includes a base with a hollow interior and a hollow column at its center, connected to the interior of the base. A winch system is located within the base and includes a winch plate and a reset device. The winch plate includes a ring wall for winding a wire rope and a side plate fixedly connected to one side of the ring wall. The winch plate is connected to the base around its own axis and has an initial position. When the winch plate forms an angle with the initial position, the reset device drives the winch plate to rotate back to the initial position. A braking system is also located within the base and is used to unlockably lock the winch plate, preventing it from rotating around its own axis in the locked state. This application enables the basket to rise and fall with the ship's deck.

Description

Technical Field

[0001] This application relates to the field of maritime transport and lifting, and in particular to a retractable basket for an offshore platform crane. Background Technology

[0002] In the marine environment, calm seas are rare. In addition, when ships approach offshore oil platforms, underwater turbulence has a significant impact on the dynamics of the ships. Therefore, when transporting personnel from a transport ship to the platform, the gondola placed on the deck of the transport ship will rise and fall with the transport ship. As the gondola rises and falls, the tension of the steel cable connecting the gondola and the offshore platform also changes constantly. In some cases, the gondola may even temporarily detach from the transport ship because the trough of the wave is lower than the position where the steel cable is connected. Summary of the Invention

[0003] In order to enable the basket to rise and fall with the ship's deck, this application provides a basket for launching and retracting offshore platform cranes.

[0004] The technical solution provided in this application for a launching and retracting basket for an offshore platform crane is as follows: A crane basket for offshore platforms includes a base with a hollow interior and a hollow column at its center, the hollow column being connected to the interior of the base; a winch system located within the base, the winch system including a winch plate and a reset device, the winch plate including a ring wall for winding a wire rope and a side plate fixedly connected to one side of the ring wall, the winch plate being able to connect to the base around its own axis, the winch plate having an initial position, and the reset device being able to drive the winch plate to rotate towards the initial position when the winch plate is at an angle to the initial position; and a braking system located within the base, the braking system being used to unlockably lock the winch plate, preventing it from rotating around its own axis in the locked state.

[0005] By adopting the above technical solution, the winch plate of the hoisting system has an initial position. The winch plate is used to wind the wire rope. As the basket rises and falls with the transport ship, the wire rope pulls the winch plate, causing it to leave the initial position. This prevents the basket from temporarily detaching from the transport ship because the trough position is lower than the position when the wire rope is connected. The winch plate, after leaving the initial position, will rotate back to the initial position under the drive of the reset device. During the rotation of the winch plate back to the initial position, it can provide a tension to the wire rope, keeping the wire rope under a certain tension, thereby preventing the basket from swaying due to insufficient tension on the wire rope.

[0006] Optionally, the side plate is provided with a plurality of rope clamps on the side away from the ring wall, the rope clamps being arranged at equal intervals around the circumference of the ring wall, and the side plate being provided with rope holes for the steel wire rope to pass through.

[0007] By adopting the above technical solution, the wire rope can be clamped by the rope clamp, so that the end of the wire rope away from the offshore platform is fixed relative to the winch plate.

[0008] Optionally, the reset device includes a rotating shaft and a spiral spring. The rotating shaft is located inside the base and is fixedly connected to the base. The winch plate is rotatably connected to the rotating shaft. The spiral spring is located between the annular wall of the winch plate and the rotating shaft.

[0009] By adopting the above technical solution, the end of the spiral spring near its inner side is fixedly connected to the rotating shaft, and the end of the spiral spring near its outer side is fixedly connected to the ring wall of the winch plate. When the winch plate leaves the initial position, the spiral spring is affected by the winch plate and undergoes bending elastic deformation, causing the spiral spring to twist in the plane. After the spiral spring is twisted by the force, its own elasticity generates a force that restores the spiral spring to its original shape, thereby driving the winch plate back to the initial position.

[0010] Optionally, the base is further provided with a support frame, which includes an upper support plate, a lower support plate and a connecting plate. The lower support plate is fixedly connected to the upper support plate through the connecting plate. The upper support plate is fixedly connected to the top wall of the base. The rotating shaft is arranged in a vertical direction and its two ends are fixedly connected to the upper support plate and the lower support plate respectively. The winch plate is located between the upper support plate and the lower support plate.

[0011] By adopting the above technical solution, the support frame can support the winch plate and connect the rotating shaft. The rotating shaft is connected by the support plate, which can replace the base to share the force applied to the winch plate by the wire rope, reduce the burden on the base, and improve the service life. The rotating shaft set in the vertical direction can make the winch plate parallel to the base, thereby reducing the space occupied by the winch plate in the internal space of the base and reducing the height of the base in the vertical direction, making it easier for personnel to climb.

[0012] Optionally, the hoisting system further includes a guide wheel assembly, which includes a horizontal guide pulley and a vertical guide pulley. The axle of the horizontal guide pulley is parallel to the rotating shaft, and both ends of the axle of the horizontal guide pulley are fixedly connected to the upper support plate and the lower support plate, respectively. The axle of the vertical guide pulley is arranged in a horizontal direction, and the axle of the vertical guide pulley is fixedly connected to the upper support plate through a mounting plate. The plane in which the vertical guide pulley is located is tangent to the plane in which the horizontal guide pulley is located.

[0013] By adopting the above technical solution, the guide wheel assembly can guide the wire rope, enabling the wire rope to change from a horizontal to a vertical direction from the winch plate to the offshore platform, so that the basket can move together with the offshore transport ship under the action of the waves.

[0014] Optionally, the braking system includes a follower gear, a brake gear, and an electromagnetic brake. The follower gear is located on the side of the ring wall away from the side plate and is fixedly connected to the ring wall. The brake gear meshes with the follower gear. The electromagnetic brake is located on the side of the lower support plate away from the upper support plate. The brake shaft of the electromagnetic brake passes through the lower support plate and is rotatably connected to the upper support plate. The brake gear is fixedly connected to the brake shaft of the electromagnetic brake.

[0015] By adopting the above technical solution, the electromagnetic brake can lock the brake gear that is fixedly connected to the brake shaft. Since the brake gear meshes with the follower gear, when the brake gear is locked, the follower gear cannot rotate around its own axis under the action of the brake gear, thus making it fixedly connected to the follower gear.

[0016] Optionally, the electromagnetic brake is fitted with a waterproof cover.

[0017] By adopting the above technical solution, the waterproof cover can protect the electromagnetic brake.

[0018] Optionally, the base also includes a power supply box and a control box. The control box is signal-connected to the braking system, and the power supply box is electrically connected to both the control box and the braking system.

[0019] By adopting the above technical solution, the power supply box is used to install the storage battery. The power supply box with the storage battery can supply power to the control box and the braking system, and the control box is used to control the working status of the braking system.

[0020] Optionally, the base is fitted with an anti-collision sleeve, and the bottom of the base is provided with an anti-collision ring. A magnetic suction plate is provided at the center of the bottom of the anti-collision ring, and the magnetic suction plate is fixedly connected to the anti-collision ring through an insulating component.

[0021] By adopting the above technical solutions, the anti-collision sleeve and anti-collision ring can protect the base, the magnetic suction plate can enhance the follow-up performance of the basket and the transfer ship, so that the basket is relatively fixed to the deck of the transfer ship before lifting, which facilitates personnel boarding. The magnetic suction plate is connected to the anti-collision ring through the insulating parts, which can reduce the influence of magnetism on the basket.

[0022] Optionally, a handle is provided on the outer wall of the hollow column.

[0023] By adopting the above technical solution, the handle can be gripped by the transfer personnel, thereby improving the safety of the transfer process.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. This application adopts an automatic reset winch system, which realizes the automatic reset of the winch plate through the elastic force of the spiral spring. The automatic reset function of the winch plate enables the basket to rise and fall with the maritime transport vessel, thereby improving the safety and efficiency of personnel transfer at sea. 2. This application employs a braking system, including a follower gear, a brake gear, and an electromagnetic brake, which enables rapid locking of the winch plate, enhances the safety performance of the equipment, ensures that the winch plate will not bear excessive load during the lifting of the suspended platform, reduces the occurrence of accidents, and extends its service life.

[0025] 3. This application reduces collision damage between the suspended platform and the surrounding environment and improves the durability of the equipment by setting anti-collision measures such as anti-collision sleeves, anti-collision rings and magnetic suction plates; at the same time, the handle design also improves the convenience and safety of transportation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the launching and retracting basket for the offshore platform crane provided in the embodiments of this application; Figure 2 This is a schematic diagram of the internal structure of the base provided in an embodiment of this application, wherein the top wall and side walls of the base are not shown; Figure 3 This is a structural schematic diagram of the offshore platform crane's retractable basket provided in an embodiment of this application from another angle.

[0027] Explanation of reference numerals in the attached drawings: 1-Base; 2-Hollow column; 3-Winding plate; 301-Ring wall; 302-Side plate; 303-Rope clamp; 304-Rope hole; 4-Rotating shaft; 5-Roll spring; 6-Upper support plate; 7-Lower support plate; 8-Connecting plate; 9-Horizontal guide pulley; 10-Mounting plate; 11-Longitudinal guide pulley; 12-Following gear; 13-Brake gear; 14-Electromagnetic brake; 15-Waterproof cover; 16-Power supply box; 17-Control box; 18-Anti-collision sleeve; 19-Anti-collision ring; 20-Insulating component; 21-Magnetic suction plate; 22-Handle; 23-Reinforcing rib. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0029] This application discloses a launching and retracting basket for an offshore platform crane.

[0030] like Figure 1As shown, the offshore platform crane's retractable basket includes a base 1, a winch system, and a braking system. The base 1 is hollow, with a hollow column 2 at its center, connected to the interior of the base 1. The winch system, located within the base 1, includes a winch plate 3 and a reset device. The winch plate 3 includes an annular wall 301 for winding the wire rope and a side plate 302 fixedly connected to the annular wall 301. The annular wall 301 is cylindrical, and its outer surface can be machined with deep grooves. These grooves not only guide the neat winding of the wire rope but also prevent the wire rope from skipping or becoming tangled during winch operation. The side plate 302 is connected to the annular wall 301. The tight connection on one side of the 01 enhances the structural rigidity of the entire winch plate 3. Multiple rope clamps 303 are arranged on the side of the side plate 302 away from the annular wall 301. These rope clamps 303 are equidistantly arranged to ensure that the wire rope is firmly clamped under stress, greatly reducing the risk of loosening or displacement. Furthermore, rope holes 304 are provided on the side plate 302 so that the wire rope can pass through the rope holes 304 and be clamped at the rope clamps 303, achieving linkage between the winch plate 3 and the wire rope. When transporting personnel from a sea transport ship to the offshore platform, the offshore platform lowers the wire rope via a crane. The wire rope enters the internal space of the base 1 through the hollow column 2 and connects to the winch plate 3, thus achieving linkage between the winch plate 3 and the wire rope.

[0031] In addition, the winch plate 3 can be connected to the base 1 around its own axis. The winch plate 3 has an initial position. When the winch plate 3 is at an angle to the initial position, the reset device can drive the winch plate 3 to rotate to the initial position. The braking system is located in the base 1 and is used to lock the winch plate 3 in an unlockable manner so that it cannot rotate around its own axis in the locked state.

[0032] As shown in Figure*, specifically, the reset device consists of a rotating shaft 4 and a spiral spring 5. The rotating shaft 4 is fixedly installed inside the base 1, providing a stable rotation axis for the winch plate 3. The spiral spring 5 is arranged between the annular wall 301 of the winch plate 3 and the rotating shaft 4; that is, the end of the spiral spring 5 closest to its inner side is fixedly connected to the rotating shaft 4, and the end of the spiral spring 5 closest to its outer side is fixedly connected to the annular wall 301 of the winch plate 3. When the winch plate 3 rotates relative to its initial position, the spiral spring 5 undergoes bending elastic deformation, causing the spiral spring 5 to twist in the plane. After the spiral spring 5 is twisted under force, its elasticity generates a restoring force that restores the spiral spring 5 to its original shape. It is this restoring force that drives the winch plate 3 to automatically return to its initial position when no external force is applied.

[0033] As shown in Figure*, to further enhance the overall structural stability, a support frame is added inside the base 1. The support frame consists of an upper support plate 6, a lower support plate 7, and a connecting plate 8, forming a frame structure. The upper support plate 6 is fixedly connected to the top wall of the base 1, and the lower support plate 7 is fixedly connected to the upper support plate 6 via the connecting plate 8, providing an installation foundation for the hoisting and braking systems. The rotating shaft 4 vertically penetrates both the upper support plate 6 and the lower support plate 7, ensuring vertical stability under all conditions, thereby withstanding various forces and torques from the hoisting plate 3, reducing the burden on the base 1, and extending its service life. The vertically positioned rotating shaft 4 allows the hoisting plate 3 to be parallel to the base 1, thus reducing the space occupied by the hoisting plate 3 within the base 1 and decreasing the vertical height of the base 1, facilitating personnel access.

[0034] As shown in Figure*, to reduce frictional loss of the wire rope during transmission and optimize its trajectory, the winch system also includes a guide pulley assembly. The guide pulley assembly consists of a horizontal guide pulley 9 and a vertical guide pulley 11. The two ends of the axle of the horizontal guide pulley 9 are fixedly connected to the upper support plate 6 and the lower support plate 7, respectively. The axle of the vertical guide pulley 11 is fixedly connected to the upper support plate 6 via a mounting plate 10. The horizontal guide pulley 9 and the vertical guide pulley 11 form a smooth transition area. When the wire rope moves during winch operation, the guide pulley assembly guides it along a predetermined path, significantly reducing wear and energy loss caused by friction.

[0035] As shown in Figure*, the braking system includes a follower gear 12, a brake gear 13, and an electromagnetic brake 14. The follower gear 12 is located on the side of the annular wall 301 away from the side plate 302 and is fixedly connected to the annular wall 301. The brake gear 13 meshes with the follower gear 12. The electromagnetic brake 14 is located on the side of the lower support plate 7 away from the upper support plate 6, that is, between the lower support plate 7 and the bottom wall of the base 1. The brake shaft of the electromagnetic brake 14 passes through the lower support plate 7 and is rotatably connected to the upper support plate 6. The brake gear 13 is fixedly connected to the brake shaft of the electromagnetic brake 14.

[0036] The follower gear 12 is tightly connected to the winch plate 3, and can reflect the rotation state of the winch plate 3 in real time. The brake gear 13, which is fixedly connected to the brake shaft of the electromagnetic brake 14, precisely meshes with the follower gear 12, ready to lock when necessary. When the electromagnetic brake 14 receives a locking command, the electromagnetic brake 14 will act quickly, locking the brake shaft so that the brake gear 13 cannot rotate around its own axis, thereby indirectly locking the follower gear 12 and the entire winch plate 3. This ensures that when the offshore crane recovers the wire rope, the winch plate 3 will not be wound with the wire rope, allowing the basket to rise to the offshore platform along with the wire rope.

[0037] As shown in Figure*, the base 1 also integrates a power supply box 16 and a control box 17. The battery in the power supply box 16 provides power to the entire system, while the control box 17 houses the control system. The control system can connect to and control the electromagnetic brake 14 and the crane on the offshore platform, receiving instructions from operators or transport personnel, and controlling the opening and closing of the electromagnetic brake 14 and the crane according to the instructions.

[0038] As shown in Figure*, for safety, a crash sleeve 18 is installed on the outer side of the base 1. The crash sleeve 18 uses internal foam with a 3-5mm thick polyurea coating on the outside. The crash sleeve 18 provides effective cushioning protection in the event of an accidental collision between the basket and surrounding objects. Meanwhile, the crash ring 19 and magnetic plate 21 at the bottom of the base 1 further enhance the stability of the basket. The magnetic plate 21 can adhere to the metal deck surface of the transport vessel, preventing the basket from sliding or overturning. The magnetic plate 21, connected to the crash ring 19 via an insulating component 20, also reduces the impact of magnetism on the normal operation of the basket.

[0039] To enhance the safety of personnel during the lifting process, handles 22 are provided on the outer wall of the hollow column 2. Personnel can grip the handles 22 on the hollow column 2 to ensure a stable position on the suspended platform. To improve the overall structural strength of the suspended platform, reinforcing ribs 23 can be installed on the base 1. One end of the reinforcing rib 23 is connected to the base 1, and the other end is connected to the hollow column 2. The hollow column 2, reinforcing rib 23, and base 1 form a stable triangle, thereby improving the overall structural strength of the suspended platform and allowing personnel to stabilize themselves using both the handles 22 and the reinforcing ribs 23.

[0040] The implementation principle of a launching and retracting basket for an offshore platform crane according to an embodiment of this application is as follows: First, during the preparation phase, operators need to conduct a thorough inspection of all components of the suspended platform. The inspection steps include confirming the stability of the base 1, checking the spiral spring 5 of the hoisting system for signs of wear or breakage, and verifying that the electromagnetic brake 14 of the braking system is in good working order.

[0041] The next step is the installation of the suspended platform. During installation, the operator places the suspended platform at its designated location on the offshore platform and secures it relative to the platform using magnetic plates 21. The crane's wire rope is then fed into the base 1, passing through the hollow column 2 into the base plate, and then via guide wheels to the winch plate 3. One end of the wire rope is passed through the rope hole 304 on the side plate 302 and secured to the rope clamp 303 on the side plate 302. After securing the wire rope, it is wound around the annular wall 301. Once wound, the crane is operated to tighten the wire rope, causing it to move the winch plate 3 away from its initial position. When the winch plate 3 moves from its initial position and reaches the preset position, the braking system locks the winch plate 3. In this embodiment, the angle difference between the preset position and the initial position can be between 180° and 540°.

[0042] During the actual transfer process, operators need to use a crane to send the basket to the deck of the transfer vessel, placing it as close as possible to the crane directly below the offshore platform. This ensures that the hollow column 2 of the basket and the wire rope remain vertical, and the basket is fixed relative to the deck of the transfer vessel by the magnetic suction plate 21. Subsequently, the locking of the winch plate 3 is released by controlling the braking system. As the basket moves up and down with the transport vessel under the influence of waves, the wire rope maintains a certain tension under the action of the spiral spring 5. This prevents the basket from temporarily detaching from the transport vessel due to the wave trough being lower than the position where the wire rope was connected, and also prevents the wire rope from losing tension and making it difficult for the basket to maintain stability due to the wave crest being higher than the position where the wire rope was connected.

[0043] As the gondola rises and falls with the transport ship due to the waves, it remains stationary relative to the ship, allowing the transport personnel to board the gondola in a timely manner.

[0044] Finally, after the transfer personnel board the basket, they need to activate the locking state of the electromagnetic brake 14 through the control box 17 and operate the crane through the control box 17 to smoothly lift the basket. As the basket is lifted back to the offshore platform, the entire lifting process is completed.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A type of launch and recovery basket for an offshore platform crane, characterized in that, include: The base (1) is hollow inside, and a hollow column (2) is provided at the center of the base (1), and the hollow column (2) is connected to the interior of the base (1). A winch system is provided inside the base (1). The winch system includes a winch plate (3) and a reset device. The winch plate (3) includes an annular wall (301) for winding a wire rope and a side plate (302) fixedly connected to the annular wall (301) on one side. The winch plate (3) can be connected to the base (1) around its own axis. The winch plate (3) has an initial position. When the winch plate (3) is at an angle to the initial position, the reset device can drive the winch plate (3) to rotate toward the initial position. A braking system is provided inside the base (1) and is used to lock the winch plate (3) in an unlockable manner so that it cannot rotate around its own axis in the locked state. The reset device includes a rotating shaft (4) and a spiral spring (5). The rotating shaft (4) is located inside the base (1) and is fixedly connected to the base (1). The winch plate (3) is rotatably connected to the rotating shaft (4). The spiral spring (5) is located between the annular wall (301) of the winch plate (3) and the rotating shaft (4).

2. The offshore platform crane retraction and deployment basket according to claim 1, characterized in that, The side plate (302) away from the annular wall (301) is provided with a plurality of rope clamps (303), the rope clamps (303) are arranged at equal intervals around the annular wall (301) in the circumference, and the side plate (302) is provided with rope holes (304) for the steel wire rope to pass through.

3. The offshore platform crane retraction and deployment basket according to claim 1, characterized in that, The base (1) is also provided with a support frame, which includes an upper support plate (6), a lower support plate (7) and a connecting plate (8). The lower support plate (7) is fixedly connected to the upper support plate (6) through the connecting plate (8). The upper support plate (6) is fixedly connected to the top wall of the base (1). The rotating shaft (4) is arranged in a vertical direction and its two ends are fixedly connected to the upper support plate (6) and the lower support plate (7) respectively. The winch plate (3) is located between the upper support plate (6) and the lower support plate (7).

4. The offshore platform crane retraction basket according to claim 3, characterized in that, The hoisting system also includes a guide wheel assembly, which includes a horizontal guide pulley (9) and a vertical guide pulley (11). The axle of the horizontal guide pulley (9) is parallel to the rotating shaft (4), and both ends of the axle of the horizontal guide pulley (9) are fixedly connected to the upper support plate (6) and the lower support plate (7) respectively. The axle of the vertical guide pulley (11) is arranged in the horizontal direction, and the axle of the vertical guide pulley (11) is fixedly connected to the upper support plate (6) through the mounting plate (10). The plane in which the vertical guide pulley (11) is located is tangent to the plane in which the horizontal guide pulley (9) is located.

5. The offshore platform crane retraction basket according to claim 3, characterized in that, The braking system includes a follower gear (12), a brake gear (13), and an electromagnetic brake (14). The follower gear (12) is located on the side of the annular wall (301) away from the side plate (302) and is fixedly connected to the annular wall (301). The brake gear (13) meshes with the follower gear (12). The electromagnetic brake (14) is located on the side of the lower support plate (7) away from the upper support plate (6). The brake shaft of the electromagnetic brake (14) passes through the lower support plate (7) and is rotatably connected to the upper support plate (6). The brake gear (13) is fixedly connected to the brake shaft of the electromagnetic brake (14).

6. The offshore platform crane retraction basket according to claim 5, characterized in that, The electromagnetic brake (14) is covered with a waterproof cover (15).

7. The offshore platform crane retraction basket according to claim 1, characterized in that, The base (1) is also provided with a power supply box (16) and a control box (17). The control box (17) is connected to the braking system via signal, and the power supply box (16) is electrically connected to both the control box (17) and the braking system.

8. The offshore platform crane retraction basket according to claim 1, characterized in that, The base (1) is covered with an anti-collision sleeve (18), and the bottom of the base (1) is provided with an anti-collision ring (19). A magnetic suction plate (21) is provided at the center of the bottom of the anti-collision ring (19), and the magnetic suction plate (21) is fixedly connected to the anti-collision ring (19) through an insulating part (20).

9. The offshore platform crane retraction basket according to claim 1, characterized in that, The hollow column (2) is provided with a handle (22) on its outer side wall.

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