Oil cylinder arrangement structure of movable ramp of roll-on-roll-off ship

Abstract

According to the oil cylinder arrangement structure of the roll-on-roll-off ship movable ramp, the movable ramp is located above a freeboard deck, a liquid tank and an air duct are arranged between the freeboard deck and the movable ramp, and the oil cylinder arrangement structure comprises an oil cylinder arrangement structure space defined by peripheral side structure longitudinal walls, the movable ramp and the freeboard deck. The air ducts and the liquid tanks are sequentially arranged on the two sides of the oil cylinder arrangement structure space from bottom to top, the structure longitudinal wall and the wall of each liquid tank are arranged in a spaced mode, and the oil cylinders are located in the oil cylinder arrangement structure space and connected with the freeboard deck through oil cylinder bases fixed to the freeboard deck. According to the oil cylinder arrangement structure of the roll-on-roll-off ship movable ramp, the requirements for liquid tank and air duct arrangement are met, and the requirements for oil cylinder supporting strength and oil cylinder maintenance are met.

Description

Technical Field

[0001] This utility model belongs to the field of shipbuilding technology, and specifically relates to a hydraulic cylinder arrangement structure for a roll-on / roll-off ship ramp. Background Technology

[0002] In addition to meeting strength requirements, the arrangement of hydraulic cylinders in roll-on / roll-off ramps must also consider the requirements of liquid tank arrangement and cargo hold loading. For situations where the ramp is located on the freeboard deck, with liquid tanks and ventilation ducts beneath it, a hydraulically embedded ramp is not feasible because the hoisting wire ropes would affect cargo hold loading and watertightness. Therefore, a hydraulically supported ramp is the only viable option, necessitating the search for a reasonable solution for arranging the hydraulic cylinders in the ramp. Utility Model Content

[0003] To address the aforementioned issues, this utility model provides a hydraulic cylinder arrangement structure for a roll-on / roll-off ship's movable ramp, which satisfies both the requirements for liquid tank and air duct arrangement, as well as the hydraulic cylinder support strength and maintenance requirements.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A cylinder arrangement structure for a roll-on / roll-off (Ro-Ro) ship's movable ramp, the movable ramp being located above the freeboard deck, with a liquid tank and a ventilation duct between the freeboard deck and the movable ramp. The cylinder arrangement structure includes a cylinder arrangement space enclosed by the four side longitudinal walls, the movable ramp, and the freeboard deck. The ventilation duct and the liquid tank are arranged sequentially from bottom to top on both sides of the cylinder arrangement space. The longitudinal walls of the structure and the liquid tank walls are spaced apart. The cylinders are located within the cylinder arrangement space and are connected to the freeboard deck via cylinder bases fixed to the freeboard deck.

[0006] Furthermore, a base reverse structure reinforcement is provided on the reverse side of the freeboard deck located directly below the cylinder base.

[0007] Furthermore, a straight ladder is provided on the starboard side longitudinal wall within the cylinder arrangement structure space.

[0008] Furthermore, a lighting tube is fixed to the side wall of the cylinder arrangement structure space by a bracket.

[0009] Furthermore, a cable hole is provided on the port side of the freeboard deck within the cylinder arrangement structure space, and a floor drain is provided on the starboard side of the freeboard deck within the cylinder arrangement structure space.

[0010] Furthermore, the shortest distance between the longitudinal wall of the cylinder arrangement structure space and the liquid tank wall is 600mm.

[0011] The hydraulic cylinder arrangement structure of the roll-on / roll-off ship's movable ramp is not coplanar with the tank walls, but vertically penetrates the air duct. The reinforced structure on the reverse side of the base ensures sufficient hydraulic cylinder support strength. The bulkhead ensures longitudinal wall continuity and avoids stress concentration. The openings in the bulkhead structure prevent liquid accumulation in the corners of the tank, and the openings at the bottom reduce ventilation resistance. It satisfies the hydraulic cylinder support strength requirements, prevents liquid accumulation in the corners of the tank, and also meets ventilation needs. The straight ladder and lighting tubes allow crew members to access the ramp for maintenance, and the floor drain prevents accidental water from stagnating over a large area. Attached Figure Description

[0012] Figure 1 This is a longitudinal sectional view of the movable ramp hydraulic cylinder arrangement structure described in this utility model.

[0013] Figure 2 This is a horizontal cross-sectional schematic diagram of the movable ramp hydraulic cylinder arrangement structure described in this utility model.

[0014] Among them, 1-cylinder arrangement structure space, 2-liquid tank, 3-cylinder, 4-movable ramp, 5-cylinder base, 6-base reverse structure reinforcement, 7-air duct, 8-straight ladder, 9-cable hole, 10-floor drain, 11-lighting tube, 12-bullet structure opening, 13-freeboard deck, 14-bullet. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0016] like Figures 1-2 As shown, a cylinder arrangement structure for a roll-on / roll-off ship's movable ramp 4 is provided. The movable ramp 4 is located on the freeboard deck. A liquid tank 2 and a ventilation duct 7 are provided between the freeboard deck and the movable ramp 4. The cylinder arrangement structure includes a cylinder arrangement structure space 1 enclosed by the four side structural longitudinal walls, the movable ramp 4, the freeboard deck 13, and the cylinder arrangement structure space 1. The ventilation duct 7 and the liquid tank 2 are arranged sequentially from bottom to top on both sides of the cylinder arrangement structure space 1. The structural longitudinal walls and the liquid tank walls are spaced apart. The cylinder 3 is located in the cylinder arrangement structure space 1 and is connected to the freeboard deck 13 through a cylinder base 5 fixed to the freeboard deck 13.

[0017] It is understood that in this embodiment, the cylinder arrangement structure space 1 does not share a wall with the liquid tank 2, the vertically penetrating air duct 7 is provided, and the bottom is provided with a cylinder base 5, which not only meets the cylinder support strength requirements, but also avoids liquid accumulation in the corners of the liquid tank 2, while also taking into account the ventilation requirements.

[0018] Furthermore, a base reverse structure reinforcement 6 is provided on the reverse side of the freeboard deck located directly below the cylinder base 5.

[0019] Understandably, the reinforced reverse structure further ensures the required strength of the hydraulic cylinder support.

[0020] Furthermore, a straight ladder 8 is provided on the starboard side longitudinal wall within the cylinder arrangement structure space 1; a lighting tube 11 is arranged near the top of the straight ladder 8, and the lighting tube 11 is fixed to the structural side wall of the cylinder arrangement structure space 1 by a bracket.

[0021] It is understandable that the installation of the ladder 8 and the lighting tubes ensures that crew members can access the maintenance cylinder.

[0022] Furthermore, a cable hole 9 is provided on the port side of the freeboard deck within the cylinder arrangement structure space 1, and a floor drain 10 is provided on the starboard side of the freeboard deck within the cylinder arrangement structure space 1.

[0023] Understandably, the drain 10 is designed to prevent accidentally entering water from stagnating over a large area.

[0024] In this embodiment, the shortest distance between the longitudinal wall of the cylinder arrangement structure space 1 and the tank wall is 600mm. A floor-mounted partition structure opening 12 (700*400mm) is provided in the middle structure.

[0025] Those skilled in the art should understand that the above description is merely a specific embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic cylinder arrangement structure for a roll-on / roll-off (Ro-Ro) ship's movable ramp, wherein the movable ramp is located above the freeboard deck, and a liquid tank and a ventilation duct are provided between the freeboard deck and the movable ramp, characterized in that, The cylinder arrangement structure includes a cylinder arrangement structure space enclosed by the four side longitudinal walls, the movable ramp, and the freeboard deck. The air duct and the liquid tank are arranged sequentially from bottom to top on both sides of the cylinder arrangement structure space. The longitudinal walls of the structure and the liquid tank walls are spaced apart. The cylinder is located in the cylinder arrangement structure space and is connected to the freeboard deck through a cylinder base fixed to the freeboard deck.

2. The cylinder arrangement structure of a roll-on / roll-off ship ramp according to claim 1, characterized in that, A base reverse structure reinforcement is provided on the reverse side of the freeboard deck located directly below the cylinder base.

3. The cylinder arrangement structure of a roll-on / roll-off ship ramp according to claim 2, characterized in that, A straight ladder is provided on the longitudinal wall of the starboard side structure within the space of the cylinder arrangement structure.

4. The cylinder arrangement structure of a roll-on / roll-off ship ramp according to claim 3, characterized in that, A lighting tube is fixed to the side wall of the cylinder arrangement structure space by a bracket.

5. The cylinder arrangement structure of a roll-on / roll-off ship ramp according to claim 4, characterized in that, A cable hole is provided on the port side of the freeboard deck within the cylinder arrangement structure space, and a floor drain is provided on the starboard side of the freeboard deck within the cylinder arrangement structure space.

6. The cylinder arrangement structure of a roll-on / roll-off ship ramp according to claim 5, characterized in that, The shortest distance between the longitudinal wall of the hydraulic cylinder arrangement structure space and the liquid tank wall is 600mm.

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