Mobile dock

Abstract

A mobile dock includes a frame for placing ships on its upper surface. Each layer of the frame is formed by at least three longitudinal beams and at least five transverse beams interlaced and fixed together. Several vertical beams connect adjacent upper and lower layers. Climbing frames are symmetrically arranged on both sides of the upper surface of the frame along its length, allowing workers to climb to the top. The advantages of this invention are: by symmetrically arranging climbing frames, workers can directly climb from both sides of the frame to the top to access the ship's operating platform without the need for additional scaffolding, significantly reducing preparation time and labor costs. It also eliminates safety hazards such as falls and structural instability that may occur during scaffolding erection and dismantling, achieving a function similar to a dock but with greater flexibility and convenience.

Description

Technical Field

[0001] This utility model relates to a ship repair equipment, and more particularly to a mobile dock. Background Technology

[0002] Mobile docks are widely used in the field of ship repair to safely transfer vessels to shore-based repair stations, replacing traditional dry docks or floating docks, thereby reducing damage to the natural environment and lowering operating costs.

[0003] Taking Chinese patent document CN215972028U as an example, the slipway includes a frame with an upper surface for mooring ships; the connecting structure can be detachably or movably connected to a transport device such as a flatbed truck.

[0004] During operation, the ship is first launched into the water, then a tractor smoothly pulls the vessel onto the slipway to secure it in place. Next, a transport device supports the slipway and moves the vessel to the designated maintenance area. This design enables smooth, deformation-free vessel transfer, avoiding the high costs of building dry docks and the disruption to the aquatic ecosystem. It is suitable for various scenarios such as ports and shipyards, improving operational safety and economy.

[0005] While the slipway offers advantages in vessel transfer such as safety, stability, low cost, and environmental friendliness, it still has certain drawbacks. Specifically, after the vessel is towed onto the slipway by a tractor and transported to the maintenance bay by equipment, workers need to erect additional scaffolding on the slipway before they can board the vessel for maintenance work. This process not only increases preparation time and labor costs but may also introduce safety hazards, thereby reducing overall maintenance efficiency. Furthermore, the erection and dismantling of scaffolding prolongs the maintenance cycle, affects work bay turnover, and limits the slipway's applicability in high-efficiency maintenance scenarios. Utility Model Content

[0006] In view of the shortcomings of the existing technology, this utility model provides a mobile dock that facilitates workers to board the ship for operations.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a mobile dock, comprising a frame for placing ships on its upper surface, each layer of which is fixed by at least 3 longitudinal beams and at least 5 transverse beams in a crisscross pattern, and several vertical beams connecting adjacent upper and lower layers, with climbing frames symmetrically arranged on both sides of the upper surface of the frame along its length, the climbing frames being used to allow people to climb to the top.

[0008] The beneficial effects of this utility model are as follows: By symmetrically setting up the climbing frame, workers can directly climb from both sides of the frame to the top to enter the ship's operating platform for work, without the need for additional scaffolding. This significantly reduces preparation time and labor costs, while eliminating potential safety hazards such as falls and structural instability during scaffolding erection and dismantling, thus improving overall maintenance efficiency and workstation turnover rate. Furthermore, the integrated design of the climbing frame avoids reliance on external equipment, simplifies the operation process, and is suitable for various ship maintenance scenarios. As a preferred option, the climbing frame can be designed as a fixed stepped structure, consisting of multiple steps and side handrails. The steps are made of non-slip steel plates, allowing workers to climb step by step to the upper surface of the frame. The inclination angle and width of the steps are optimized according to ergonomics to ensure a smooth and safe climbing process. Alternatively, the climbing frame can be a lifting platform, which moves along vertical guide rails via hydraulic or mechanical drive. Workers stand inside the platform and adjust the height to the desired position using control buttons. The platform automatically locks during lifting to prevent accidental slippage, enabling fast and controllable boarding operations.

[0009] Furthermore, the climbing frame includes a vertical frame connected to the upper surface of the frame body and a platform connected to the top of the vertical frame. The vertical frame is equipped with stairs, and the platform extends from the top of the vertical frame toward the outside of the frame body.

[0010] The combined structure of the vertical frame and platform provides robust support, while the stairs facilitate safe access for workers. The outward-extending platform effectively avoids interference with the internal space of the vessel, ensuring smooth maintenance operations and reducing equipment adjustment time caused by spatial conflicts. This design also enhances the overall structural stability and practicality, making it suitable for vessels of different sizes. As a preferred option, the vertical frame can be a welded steel pipe frame structure, with the stairs fixed to one side of the frame and composed of multiple intersecting horizontal and vertical bars. Workers climb step by step by holding the horizontal bars. The platform, made of steel plate and cantilevered outwards, is reinforced at the bottom with diagonal bracing to ensure stability when supporting workers and tools. Alternatively, the platform can be designed as an adjustable-angle type, hinged to the top of the vertical frame. Workers can manually or electrically adjust the platform's tilt to bring it closer to the vessel's surface as needed. The stairs are integrated inside the vertical frame, featuring a folding design that unfolds when in use and retracts when not in use, saving space and improving safety.

[0011] Furthermore, the vertical frame includes a rectangular frame and three reinforcing plates disposed within the frame. The reinforcing plate located at the center is vertically distributed and its two ends are respectively connected to the center of the frame. The other two reinforcing plates are located on the left and right sides of the reinforcing plate at the center, with one end connected to the upper end of the reinforcing plate at the center and the other end connected to the lower edge of the frame.

[0012] This vertical frame structure, through the combination of a frame and reinforcing plates, significantly enhances overall rigidity and resistance to deformation, ensuring stability under worker and tool loads, reducing fatigue damage caused by vibration or external forces, and extending service life. The optimized distribution of the reinforcing plates improves stress transfer and increases the safety factor. As a preferred embodiment, the frame is welded from angle steel into a rectangular frame, with the reinforcing plates cut from steel plates and welded into the frame to form a triangular support network. The central reinforcing plate is vertically positioned to bear the main load, while the two side reinforcing plates are diagonally connected to distribute lateral forces, allowing the load to be evenly transferred to the frame through the reinforcing plates when workers climb. As another preferred embodiment, the vertical frame can be designed as a modular unit, with the frame and reinforcing plates assembled by bolts, facilitating transportation and on-site adjustment. An anti-slip coating can be added to the surface of the reinforcing plates to improve worker safety when gripping the stairs. As yet another preferred embodiment, mounting holes for scaffolding can be provided on the side of the rectangular frame facing the interior of the frame. After the dock is pulled to the designated maintenance position, scaffolding can be mounted according to the work requirements, and removed after the work is completed to prevent damage to the hull.

[0013] Furthermore, there are four vertical frames, which are spliced ​​together and connected to the upper surface of the frame.

[0014] The four vertical frames, when spliced ​​together, provide multi-point support, enhancing the overall stability and load-bearing capacity of the climbing frame. This design is suitable for large ship maintenance. The modular design facilitates installation, disassembly, and adjustment, adapting to different frame sizes and improving the equipment's versatility and maintenance convenience. As a preferred method, the vertical frames are connected via plug-in and locking mechanisms. Each frame has positioning holes at its bottom, which are aligned with corresponding holes on the upper surface of the frame before being bolted in place. During splicing, mating grooves are provided on the sides of the vertical frames to ensure quick alignment and tightening. Alternatively, the vertical frames can be designed to be expandable, with height adjustable via telescopic rods. Quick-clamping devices are used at the joints, allowing workers to add or remove the number of vertical frames as needed to accommodate different maintenance height requirements and improve operational flexibility.

[0015] Furthermore, the staircase is installed on one of the two reinforcing plates on either side of the reinforcing plate located at the center, and the staircase extends in a direction that intersects with the platform, with a staircase opening located on the platform.

[0016] The staircase integrated into the reinforcing plate and corresponding to the platform staircase opening simplifies the structure, reduces manufacturing costs, and ensures smooth and safe access for workers going up and down the platform. It avoids the need for additional access equipment and improves space utilization efficiency. As a preferred option, the staircase consists of multiple step crossbars welded to the surface of the reinforcing plate with uniform spacing. The staircase opening is located in the center of the platform steel plate, with a protective ring around the edge. Workers can directly access the platform through the staircase opening after climbing the stairs, avoiding detours. Alternatively, the staircase can be designed as detachable, fixed to the reinforcing plate via slots. The staircase opening has a cover that closes when not in use to prevent foreign objects from entering, and opens when in use. This design facilitates easy installation, maintenance, and cleaning.

[0017] Furthermore, except for the end face facing the ship, the platform is equipped with guardrails on all other end faces.

[0018] The guardrails effectively prevent workers from falling while working on the platform, improving safety levels, especially in high-altitude maintenance scenarios, reducing risks caused by slips or external interference. The guardrail structure is simple and does not affect other platform functions. As a preferred option, the guardrail is welded together with vertical and horizontal bars. The vertical bars are evenly spaced and fixed to the platform edge, while the horizontal bars connect the top and middle of the vertical bars, forming a grid-like protection. Workers can lean against the guardrail for maintenance operations, and the guardrail surface is treated with rust prevention to extend its lifespan. Alternatively, the guardrail can be designed as a folding type, connected to the platform end face via hinges. It unfolds and locks when in use and folds up against the platform side when not in use, saving space and facilitating transportation. Furthermore, the guardrail height can be adjusted according to safety standards to adapt to different operational needs.

[0019] Furthermore, traction machines are installed on both ends of the platform facing the direction of the ship's lifting frame.

[0020] The traction machine can be a traction winch, positioned at the end of the platform. This optimizes the force transmission path, allowing it to apply tension to the vessel more directly. This avoids the rope slack or misalignment issues caused by traditional baseline settings, facilitating precise vessel positioning and improving maintenance efficiency and safety controllability. As a preferred method, the traction machine is fixed to the end of the platform's steel plate via a base equipped with shock-absorbing pads. The traction machine drum is driven by a motor, and the wire rope is led from the platform edge and connected to the vessel's pile. Workers can operate control buttons on the platform to adjust the rope tension in real time, ensuring smooth vessel movement. Alternatively, the traction machine can be designed as a double unit, with two traction machines symmetrically installed on both sides of the platform. A synchronous control system coordinates their operation, preventing uneven force distribution on one side. Protective covers are added to the traction machine casings to prevent rain or dust from affecting performance and extending the equipment's lifespan. Attached Figure Description

[0021] Figure 1This is a side view of an embodiment of the present utility model; Figure 2 This is a front view of an embodiment of the present utility model; Figure 3 This is a top view of the platform in an embodiment of the present utility model. Detailed Implementation

[0022] This utility model embodiment provides a mobile dock, such as... Figure 1-3 As shown: The mobile dock includes a frame 1 for placing ships on its upper surface. The frame 1 is a double-layer or multi-layer structure. Each layer is formed by at least 3 longitudinal beams 11 and at least 5 transverse beams 12 fixed in a crisscross pattern. The longitudinal beams 11 and transverse beams 12 are fixed by welding or bolting. Several vertical beams (not shown in the figure) are provided between the upper and lower adjacent layers. The vertical beams (not shown in the figure) are also connected to the longitudinal beams 11 and transverse beams 12 by welding or bolting. The longitudinal beams 11, transverse beams 12 and vertical beams (not shown in the figure) are all made of steel to ensure structural strength and durability. Climbing frames 2 are symmetrically arranged on both sides of the upper surface of the frame 1 along the length of the frame. The climbing frames 2 are used to allow people to climb to the top of the frame, which is convenient for repairing the ship after it is pulled ashore.

[0023] The climbing frame 2 includes a vertical frame 21 connected to the upper surface of the frame 1 and a platform 22 connected to the top of the vertical frame 21. A staircase 23 is provided on the vertical frame 21. The platform 22 extends outward from the top of the vertical frame 21 toward the outside of the frame 1. This design can prevent the platform 22 from interfering with the space inside the frame 1 where the ship is placed. The vertical frame 21 includes a rectangular frame 211 and three reinforcing plates arranged inside the frame 211. The reinforcing plate 212 located at the center is vertically distributed and its two ends are respectively connected to the center of the frame 211. The other two reinforcing plates 212 are located on the left and right sides of the reinforcing plate 212, and one end of them is connected to the upper end of the reinforcing plate 212, and the other end is connected to the lower edge of the frame 211. This structure enhances the stability and load-bearing capacity of the vertical frame 21.

[0024] There are four vertical frames 21, which are connected to each other by splicing and fixed to the upper surface of the frame 1. The stairs 23 are set on the reinforcing plate 212. Specifically, the extension direction of the stairs 23 intersects with the platform 22, and a stair opening 24 is set on the platform 22 for workers to go up and down the platform 22. This design saves manufacturing costs and improves ease of use. Except for the end face facing the ship, the other ends of the platform 22 are equipped with guardrails 25 to ensure the safety of workers on the platform. Traction machines (not shown in the figure) are set on the two ends of the platform 22 facing the ship and pulling the frame. The traction machines (not shown in the figure) are connected to the piles on the ship by ropes. Compared with the traditional method of setting them on the baseline, this arrangement makes it easier for the traction machines (not shown in the figure) to apply force, thereby adjusting the position of the ship more effectively.

[0025] The working principle of the mobile dry dock is as follows: First, the entire dry dock is launched and the vessel is placed on the upper surface of the frame 1. At this time, a traction machine (not shown in the figure) can be used to fine-tune the position of the vessel on the frame 1. By operating the traction machine (not shown in the figure) to pull the ropes, the vessel is moved to a suitable position to facilitate subsequent maintenance work. The vessel is pulled onto the upper surface of the frame 1 and placed there. The dry dock is then moved to the predetermined maintenance position by the load-bearing moving device. Subsequently, workers climb to the platform 22 via the stairs 23 of the climbing frame 2. The design of the stairs 23 and the stair opening 24 ensures smooth access to and from the platform. The guardrails 25 on the platform 22 provide safety protection. Workers can perform maintenance or inspection on the vessel on the platform 22. The entire structure, through the stable support of the frame 1 and the convenient access of the climbing frame 2, achieves efficient and safe vessel maintenance operations.

[0026] The above embodiments are merely one preferred embodiment of the present utility model. Ordinary changes and substitutions made by those skilled in the art within the scope of the present utility model's technical solution are all included within the protection scope of the present utility model.

Claims

1. A mobile dock, comprising a frame for placing ships on its upper surface, each layer of which is formed by at least 3 longitudinal beams and at least 5 transverse beams interlaced and fixed together, with a plurality of vertical beams connecting adjacent upper and lower layers, characterized in that: The upper surface of the frame is symmetrically provided with climbing frames on both sides along the length of the frame, and the climbing frames are used to allow people to climb to the top of the frame.

2. The mobile dock according to claim 1, characterized in that: The climbing frame includes a vertical frame connected to the upper surface of the frame body and a platform connected to the top of the vertical frame. A staircase is provided on the vertical frame, and the platform extends from the top of the vertical frame toward the outside of the frame body.

3. The mobile dock according to claim 2, characterized in that: The vertical frame includes a rectangular frame and three reinforcing plates disposed within the frame. The reinforcing plate located at the center is vertically distributed and its two ends are respectively connected to the center of the frame. The other two reinforcing plates are located on the left and right sides of the reinforcing plate located at the center, with one end connected to the upper end of the reinforcing plate located at the center and the other end connected to the lower edge of the frame.

4. The mobile dock according to claim 3, characterized in that: The number of vertical frames is four, which are spliced ​​together and connected to the upper surface of the frame.

5. The mobile dock according to claim 3, characterized in that: The staircase is located on one of the two reinforcing plates on either side of the reinforcing plate at the center, and the staircase extends into the platform, where the staircase entrance is located.

6. The mobile dock according to claim 2, characterized in that: Except for the end facing the ship, all other ends of the platform are equipped with guardrails.

7. The mobile dock according to claim 2, characterized in that: The platform is equipped with traction machines on both ends facing the direction of the ship's lifting frame.

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