Anti-theft embarkation ladder of unmanned platform
By designing an anti-theft boarding ladder and using a rope ladder and winch system to control the raising and lowering of the rope ladder, the problem of theft prevention on unmanned platforms is solved, providing a safe and reliable boarding passage, preventing illegal intrusion, and ensuring the safety of maintenance personnel.
Patent Information
- Application Number
- CN202423133672.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2034-12-19
AI Technical Summary
The existing methods for personnel to board and alight from unmanned platforms are ineffective in preventing unauthorized intrusion, and as the number of unmanned platforms increases, security risks are becoming increasingly prominent.
Design an anti-theft boarding ladder, which consists of a rope ladder, a winch, a winch remote control device, rope ladder guide wheels, a boarding platform, and a tie plate. The winch controls the raising and lowering of the rope ladder, providing a safe and reliable boarding passage. The lower end of the rope ladder is fixed by the rope ladder guide wheels and tie plates to prevent illegal intrusion.
When not in use, the rope ladder is retracted to the vicinity of the deck to prevent unauthorized access; when access is required, the rope ladder is lowered and secured by a remote-controlled winch to provide a safe and reliable access route and ensure the safety of maintenance personnel.
Smart Images
Figure CN223813308U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the field of offshore ship design and construction, and particularly relates to a theft-proof boarding ladder for an unmanned platform. BACKGROUND
[0002] Unmanned platforms mainly include offshore wind power platforms, offshore booster platforms and offshore converter platforms. In recent years, offshore wind farms have developed rapidly, and the number of offshore wind turbines in China has exceeded 800 in 2021, and the number of unmanned platforms is huge.
[0003] Unmanned platforms need to be regularly maintained by personnel. The current method for personnel to board the unmanned platform is to set up a fender and a steel fixed straight ladder. The operating personnel board the maintenance ship, the maintenance ship is docked to the fender of the unmanned platform, and the personnel board the unmanned platform from the steel fixed straight ladder to carry out maintenance work.
[0004] This kind of unmanned platform personnel boarding method is relatively simple and cannot prevent other personnel from boarding. With the increasing number of unmanned platforms along the coast of China, the shortcomings of this method cannot prevent theft. SUMMARY
[0005] To solve the above problems, the present application provides a theft-proof boarding ladder for an unmanned platform, which adopts the technical scheme of:
[0006] A theft-proof boarding ladder for an unmanned platform, one side of the offshore unmanned platform is provided with a boarding platform, the boarding platform is supported outside the unmanned platform by a support rod, the bottom plate of the boarding platform is a grating plate, and a fence is provided around the boarding platform. A winch is arranged on the main deck of the unmanned platform, the winch is located behind the boarding platform, a remote control device is arranged inside the winch, a rope ladder guide roller is fixed between the winch and the boarding platform, and a fixed eye plate is arranged below the boarding platform at the waterline.
[0007] A rope ladder is wound on the winch drum, the rope ladder is composed of a cable, a step and a shackle, a plurality of steps are fixed on the cable at equal intervals, the steps include wooden steps and steel steps, the bottom of the cable is fixed with a shackle, and the rope ladder passes through the rope ladder guide roller and the bottom plate of the boarding platform in sequence and is connected with the fixed eye plate through the shackle.
[0008] The above-mentioned theft-proof boarding ladder for an unmanned platform is further fixed at one end of the support rod and the lower surface of the boarding platform, and the other end is fixedly connected with the side plate of the unmanned platform.
[0009] The above-mentioned theft-proof boarding ladder for an unmanned platform is further fixed at one end of the support rod and the lower surface of the boarding platform, and the other end is fixedly connected with the side plate of the unmanned platform.
[0010] The above-mentioned theft-proof boarding ladder for an unmanned platform is further fixed at one end of the support rod and the lower surface of the boarding platform, and the other end is fixedly connected with the side plate of the unmanned platform.
[0011] The anti-theft boarding ladder of the unmanned platform further has a plurality of fixing eye plates, and the plurality of fixing eye plates are located in the same column and are arranged at equal intervals below the boarding platform.
[0012] The anti-theft boarding ladder of the unmanned platform further has a plurality of fixing eye plates, and the plurality of fixing eye plates are located in the same column and are arranged at equal intervals below the boarding platform.
[0013] The beneficial effects of the present application are as follows:
[0014] When the maintenance personnel do not need to board the unmanned platform, the rope ladder is retracted to the vicinity of the deck of the unmanned platform by the winch, and the distance from the platform water is far, which can effectively avoid being boarded by other irrelevant personnel.
[0015] When the maintenance personnel need to board the unmanned platform, the present application can control the winch by the winch remote controller to lower the rope ladder to the designated position, and the lower end is fixed by the eye plate and the upper end is fixed by the winch brake, thereby providing a safe and reliable boarding channel for the boarding personnel. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a schematic diagram of the rope ladder retraction state of the boarding ladder of the present application;
[0017] Figure 2 is a schematic diagram of the rope ladder lowering state of the boarding ladder of the present application;
[0018] Figure 3 is a schematic diagram of the rope ladder;
[0019] Figure 4 is a schematic diagram of the steel step position of the rope ladder;
[0020] Figure 5 is a schematic diagram of the boarding platform.
[0021] 1-1- shack, 1-2- cable, 1-3- steel step, 1-4- wood step, 2- winch, 4- rope ladder guide wheel, 5- boarding platform, 5-1- support rod, 5-2- grating, 5-3- rail, 5-4- handrail, 5-5- opening, 6- fixing eye plate, 7- winch remote controller, A- unmanned platform, B- main deck of the unmanned platform, C- water of the unmanned platform, D- operation and maintenance ship. DETAILED DESCRIPTION
[0022] The present application is further described in conjunction with the accompanying drawings.
[0023] The anti-theft boarding ladder of the unmanned platform is composed of a rope ladder, a winch, a winch remote control device, a rope ladder guide wheel, a boarding platform, a fastening eye plate and a winch remote control device. When there is no need for personnel to board, the rope ladder is retracted to the vicinity of the deck of the unmanned platform, far from the water surface, which can effectively avoid other irrelevant personnel from boarding; when our personnel need to board the unmanned platform, the boarding ladder can control the winch through the winch remote control device to lower the rope ladder to the water surface position, the lower end of the rope ladder is fixed through the fastening eye plate, and the upper end of the rope ladder is fixed through the winch brake, so as to provide a safe and reliable boarding channel for the boarding personnel. Figure 1 and Figure 2 as shown.
[0024] The rope ladder is composed of a shackle, a cable, a steel step and a wooden step, as shown in Figure 3 . The shackle is at the lowermost end of the rope ladder, and when the rope ladder is lowered to the designated position, the shackle is connected with the fastening eye plate near the water surface by the boarding personnel to fix the lower end of the rope ladder. Then the winch is retracted to tension the rope ladder, avoiding swinging under the action of wind and waves, which may cause danger to the boarding personnel. The cable is made of synthetic fiber material and has a density greater than seawater, which can withstand the erosion of the marine humid and high-salt environment for a long time, and is used to connect the shackles, steel steps and wooden steps to make the rope ladder an integral whole. The length of the rope ladder should be sufficient to allow the staff to board the platform under low tide conditions. In this example, the freeboard of the unmanned platform is 8 meters, and the maximum astronomical tide is 5 meters, so the effective length of the rope ladder is not less than 13 meters. The steel steps are distributed at the lower end of the rope ladder and play the role of counterweight in addition to the stepping function, making the rope ladder lower more smoothly; when the rope ladder is in the retracted state, the steel steps are located outside the rope ladder guide wheel, as shown in Figure 4 . The number of steel steps is determined according to the actual situation, and the gravity of the steel steps can prevent the rope ladder from being stuck during the lowering process. In this example, the number of steel steps is three.
[0025] The winch is the carrier of the rope ladder, and the winch drum is connected to the top end of the rope ladder. The width of the drum should be greater than the width of the rope ladder step, but not too much. In this example, the width of the drum is 200mm larger than the width of the rope ladder step. The diameter of the winch drum should not be less than 5 times the depth of the step. In this example, the depth of the step is 200mm, and the diameter of the winch drum is 1 meter. The winch has the functions of winding and unwinding, and can wind up or lower the rope ladder; the winch has the function of brake, which can bear the load of personnel boarding. The winding and braking of the winch are controlled by the winch remote control device.
[0026] The winch remote control device is installed on the winch, specifically in the winch drum, to avoid direct contact with humid and salty air, as well as rain and sea waves. The winch remote control device can receive signals from the winch remote control device and control the winding and braking functions of the winch, thereby realizing the remote control of the winch by the boarding personnel.
[0027] The rope ladder guide wheel is located between the winch and the boarding platform. After passing through the rope ladder guide wheel, the direction of the rope ladder changes to vertical downward. The diameter of the rope ladder guide wheel is not less than four times the depth of the rope ladder step. In this example, the step depth is 200 mm, and the diameter of the rope ladder guide wheel is 800 mm.
[0028] The boarding platform is composed of a support structure, a grid, a railing, a handrail, and an opening, as shown in Figure 5 The support structure is a shaped steel (angle steel, I-beam, etc.) treated with hot-dip galvanizing process with a corrosion allowance of 3 mm to ensure that the support structure does not fail due to corrosion in the long-term unattended condition. The support structure is welded to the unmanned platform side plate, providing structural support for the other parts of the boarding platform. The corrosion-resistant glass fiber reinforced plastic grid is laid on the upper part of the support structure, flush with the deck surface of the unmanned platform. The railing surrounds the outer circle of the grid to prevent personnel from falling after boarding the grid. The handrail is a position for personnel to hold when boarding the boarding platform, assisting personnel to board while ensuring safety. The opening is a passage for personnel to pass through the boarding platform, and the net size of the opening should be not less than 600 mm x 600 mm to ensure that personnel can pass through smoothly.
[0029] The mooring eye plate is welded to the appropriate position near the waterline of the unmanned platform, used to connect the rope ladder shackles, so that the lower end of the rope ladder is fixed to avoid swaying. Multiple mooring eye plates are installed in series with a spacing of 500 mm between each other to accommodate boarding needs at different tide levels.
[0030] The winch remote control weighs about 2 kg and is carried by the boarding personnel to control the winch remote control device, thereby controlling the winch retraction and brake function.
[0031] When the unmanned platform does not need personnel to board, the rope ladder is in the retracted state, as shown in Figure 1 At this time, the unmanned platform cannot be boarded.
[0032] When the relevant operating personnel need to board the unmanned platform, the personnel first board the unmanned platform on the service ship. The relevant operating personnel hold the winch remote control, confirm that the winch remote control and the winch remote control device are successfully wirelessly connected, and then click the lowering button.
[0033] The winch remote control device receives the lowering instruction and controls the winch to start lowering the rope ladder. When the rope ladder is lowered to a sufficient length for personnel to use, the personnel click the stop button on the winch remote control, and the winch stops. Then press the brake button to keep the length of the rope ladder unchanged.
[0034] The relevant operating personnel connect the shackles on the rope ladder with the mooring eye plate to fix the lower end of the rope ladder.
[0035] When the lower end of the rope ladder is fixed, the personnel click the brake release button of the winch remote control, and then click the recovery button. The winch releases the brake and starts to recover the rope ladder. When the rope ladder is tensioned, the recovery stops, and the brake button is pressed. The winch is in the brake state. At this time, the rope ladder is fixed and tensioned between the winch and the eye plate, which maximally limits the movement of the rope ladder and provides a stable channel for the personnel to board the platform. As shown in Figure 2
[0036] After the personnel check the rope ladder state, they climb along the rope ladder to the boarding platform, hold the handrails on the boarding platform, and board the platform. Then they walk from the boarding platform to the unmanned platform deck to complete the boarding operation.
[0037] When the relevant personnel finish their work on the unmanned platform, they walk from the unmanned platform to the boarding platform and descend the rope ladder to the boat. Click the brake release button of the winch remote control, and then click the lowering button. The winch releases the brake and starts to lower the rope ladder, which changes from the tensioned state to the relaxed state. Click the stop button and the brake button. Then unfasten the shackles, click the recovery button, and the winch starts to recover the rope ladder. When the rope ladder is recovered to the initial position, stop the winch recovery and turn on the winch brake. At this time, the state returns to Figure 1
[0038] The entire boarding process is completed, and the personnel can leave on the maintenance ship.
Claims
1. An anti-theft boarding ladder for an unmanned platform, characterized in that, The offshore unmanned platform is provided with a boarding platform on one side, the boarding platform is supported outside the unmanned platform by a support rod, the bottom plate of the boarding platform is a grating plate, fences are arranged around the boarding platform, a winch is arranged on the main deck of the unmanned platform, the winch is located behind the boarding platform, a remote control device is arranged in the winch, a rope ladder guide wheel is fixed between the winch and the boarding platform, and a fixing eye plate is arranged below the boarding platform at a waterline; The rope ladder is wound on the winch drum, the rope ladder is composed of a cable, steps and shackles, a plurality of steps are fixed on the cable at equal intervals, the steps include wooden steps and steel steps, the bottom of the cable is fixed with shackles, the rope ladder passes through the rope ladder guide wheel and the bottom plate of the boarding platform in sequence and is connected with the fixing eye plate through the shackles.
2. The anti-theft boarding ladder of an unmanned platform according to claim 1, characterized in that, One end of the support rod is fixed to the lower surface of the boarding platform, and the other end is fixedly connected to the side plate outside the unmanned platform.
3. The anti-theft boarding ladder of an unmanned platform according to claim 1, characterized in that, The length of the rope ladder is not less than 13 meters.
4. The anti-theft boarding ladder of claim 1, wherein, The diameter of the winch drum is 1 meter, and the diameter of the rope ladder guide wheel is 800 mm.
5. The anti-theft boarding ladder of claim 1, wherein, There are a plurality of fixing eye plates, the plurality of fixing eye plates are located in the same column, and the plurality of fixing eye plates are arranged at equal intervals below the boarding platform.
6. The anti-theft boarding ladder of claim 5, wherein, The spacing between the plurality of fixing eye plates is 500 mm.