Ballast tank ventilation pipeline penetrating structure of roll-on-roll-off ship
By designing the connection between the bottom plate of the ballast tank of a roll-on/roll-off ship and the longitudinal ribs and supplementary plates, the problems of traditional ventilation pipes occupying cargo hold space and having poor seismic performance are solved, thus improving ventilation and structural stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CSC JINLING SHIPYARD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-05-15
AI Technical Summary
Traditional ballast tank ventilation ducts on roll-on/roll-off ships occupy cargo hold space, affecting cargo loading flexibility, and have poor seismic resistance and insufficient ventilation, failing to meet the vibration requirements of the marine environment.
The design adopts a system in which the bottom plate of the ballast tank is connected to the longitudinal ribs and reinforcement plates. Ventilation ducts pass through the longitudinal ribs and/or reinforcement plates, and the connection between the reinforcement plates and the longitudinal ribs and the setting of reinforcing ribs ensure both air permeability and structural stability.
The ballast tank ventilation duct was effectively integrated, maintaining the flexibility of cargo loading space, enhancing seismic performance, and ensuring ventilation and structural stability.
Smart Images
Figure CN224241199U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of shipbuilding technology, and specifically relates to a through-structure for a ventilated pipe in the ballast tank of a roll-on / roll-off ship. Background Technology
[0002] Ro-Ro ships (RO-RO vessels) require ballast tanks on both port and starboard sides with double bottoms to maintain adequate airflow and regulate ballast water level. Sometimes, these tanks are further separated by watertight longitudinal girder. For ballast tanks near the midships, where the main deck above the cargo hold is directly above, traditional venting pipes are typically laid directly upwards. This results in the venting pipes occupying cargo hold space, affecting the flexibility of cargo loading and indirectly impacting lane width and length, thus reducing space utilization. Conventional designs fail to effectively consider vibrations in the marine environment, leading to easily damaged pipes, insufficient sealing, and weak seismic resistance. Furthermore, simple pipe designs often cannot adequately ensure ventilation, resulting in restricted airflow in the ballast tanks and poor venting efficiency. Therefore, it is necessary to extend the ballast venting pipes towards the ship's sides, which necessitates the standardization of ballast venting pipe penetration structure design. Utility Model Content
[0003] To address the aforementioned problems, this utility model provides a through-structure for the ventilation pipe of the ballast tank of a roll-on / roll-off ship.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A through-structure for a venting duct in a ballast tank of a roll-on / roll-off ship includes an inner bottom plate and a supplementary plate. Multiple longitudinal ribs are provided at intervals and parallel to each other along the width direction of the ship on the reverse side of the inner bottom plate of the ballast tank. The supplementary plate is connected to the longitudinal ribs. The venting duct passes through the supplementary plate or the longitudinal ribs and / or the longitudinal ribs and the supplementary plate.
[0006] Furthermore, when the venting pipe passes through the longitudinal bone and / or the longitudinal bone and the supplementary plate, the supplementary plate is fixed to the lower end face of the longitudinal bone, the supplementary plate is arranged parallel to the longitudinal bone, a venting pipe hole is opened on the longitudinal bone, and / or an opening forming a venting pipe hole is opened on the longitudinal bone and the supplementary plate.
[0007] Furthermore, the upper end of the vertical stiffener of the rib located directly below the supplementary plate extends to the lower end face of the supplementary plate, and the two are fixedly connected.
[0008] Furthermore, a connecting elbow plate is connected between the lower end face of the supplementary plate and the side of the vertical stiffener of the rib.
[0009] Furthermore, the vertical distance between the upper part of the vent pipe hole and the reverse side of the ballast tank floor plate located above it is not less than 100mm.
[0010] Furthermore, when the ventilation duct only passes through the supplementary plate, the supplementary plate is located between two longitudinal bones located in the same longitudinal plane, and the two sides of the supplementary plate are fixedly connected to the longitudinal bones. The width of the supplementary plate is greater than the width of the longitudinal bones, and ventilation duct holes are opened on the supplementary plate.
[0011] Furthermore, a reinforcing rib extending along the length of the longitudinal bone is provided at the joint between the supplementary plate and the longitudinal bone, with both ends of the reinforcing rib located on both sides of the joint between the supplementary plate and the longitudinal bone.
[0012] Furthermore, the supplementary plate is a bulb flat steel, and the reinforcing rib is a flat steel.
[0013] The present invention provides a through-structure for the venting pipe of the ballast tank of a roll-on / roll-off ship. The connection is simple, the weight increase is minimal, and the venting holes of the pipe system are retained so that it runs horizontally through the longitudinal components of the structure. Attached Figure Description
[0014] Figure 1 This is a cross-sectional view of the ventilation duct through the ballast tank of the rolling ship as described in Example 1.
[0015] Figure 2 yes Figure 1 View from the AA direction.
[0016] Figure 3 This is a cross-sectional view of the ventilated pipe through the ballast tank of the rolling ship as described in Example 2.
[0017] Figure 4 yes Figure 3 View from the BB direction.
[0018] Among them, 1-ballast tank floor plate, 2-supplementary plate, 3-longitudinal rib, 4-ventilation pipe hole, 5-vertical stiffener of rib plate, 6-connecting elbow plate, 7-reinforcing rib plate. Detailed Implementation
[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Example
[0020] like Figures 1-2As shown, a through-structure for a venting duct in a ballast tank of a roll-on / roll-off ship includes an inner bottom plate 1 and a supplementary plate 2. Multiple longitudinal ribs 3 are spaced parallel to each other along the width of the ship on the reverse side of the inner bottom plate 1. The supplementary plate 2 is fixed to the lower end face of the longitudinal ribs 3 and is arranged parallel to the longitudinal ribs 3. A venting pipe hole 4 is provided on the longitudinal rib 3, and / or an opening forming a venting pipe hole 4 is provided on the longitudinal rib 3 and the supplementary plate 2. The venting duct passes through the longitudinal rib 3 and / or the longitudinal rib 3 and the supplementary plate 2. The vertical distance between the upper part of the venting pipe hole 4 and the reverse side of the inner bottom plate 1 of the ballast tank located above it is not less than 100 mm.
[0021] The upper end of the vertical stiffener 5 of the rib located directly below the supplementary plate 2 extends to the lower end face of the supplementary plate 2, and the two are fixedly connected.
[0022] To ensure structural stability, a connecting elbow plate 6 is connected between the lower end face of the supplementary plate 2 and the side face of the vertical stiffener 5 of the rib.
[0023] In this embodiment, the supplementary plate 2 is a bulb flat steel. Example
[0024] like Figures 3-4 As shown, a venting duct penetration structure for a ro-ro ship's ballast tank includes an inner bottom plate 1 and a supplementary plate 2. Multiple longitudinal ribs 3 are spaced parallel to each other along the ship's width on the reverse side of the inner bottom plate 1. The original venting duct penetration location and the longitudinal ribs 3 within a certain length range to its left and right are replaced with supplementary plates 2. Specifically, the supplementary plate 2 is positioned between two longitudinal ribs 3 located in the same longitudinal plane. The two sides of the supplementary plate 2 are fixedly connected to the longitudinal ribs 3. The width of the supplementary plate 2 is greater than the width of the longitudinal ribs 3. Ventilation pipe holes 4 are opened on the supplementary plate 2, and the venting duct only passes through the supplementary plate 2.
[0025] The upper end of the vertical stiffener 5 of the rib located directly below the supplementary plate 2 extends to the lower end face of the supplementary plate 2, and the two are fixedly connected. A connecting elbow plate 6 is connected between the lower end face of the supplementary plate 2 and the side face of the vertical stiffener 5 of the rib.
[0026] To ensure structural strength, a reinforcing rib 7 extending along the length of the longitudinal rib 3 is provided at the joint between the supplementary plate 2 and the longitudinal rib 3, with both ends of the reinforcing rib 7 located on both sides of the joint between the supplementary plate 2 and the longitudinal rib 3.
[0027] In this embodiment, the supplementary plate 2 is a bulb flat steel, and the reinforcing rib 7 is a flat steel.
[0028] 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 through-type structure for ventilation ducts in ballast tanks of a roll-on / roll-off ship, characterized in that, It includes a ballast tank floor plate and a supplementary plate. On the reverse side of the ballast tank floor plate, multiple longitudinal ribs are provided at intervals and parallel to each other along the width of the ship. The supplementary plate is connected to the longitudinal ribs. The ventilation pipe passes through the supplementary plate or longitudinal ribs and / or longitudinal ribs and supplementary plate.
2. The through-type structure for the ballast tank ventilation duct of a roll-on / roll-off ship according to claim 1, characterized in that, When the ventilation pipe passes through the longitudinal bone and / or the longitudinal bone and the supplementary plate, the supplementary plate is fixed to the lower end face of the longitudinal bone, the supplementary plate is arranged parallel to the longitudinal bone, a ventilation hole is opened on the longitudinal bone, and / or an opening is opened on the longitudinal bone and the supplementary plate to form a ventilation hole.
3. The through-type structure for the ballast tank ventilation duct of a roll-on / roll-off ship according to claim 2, characterized in that, The upper end of the vertical stiffener of the rib located directly below the supplementary plate extends to the lower end face of the supplementary plate, and the two are fixedly connected.
4. The through-type structure for the ballast tank ventilation duct of a roll-on / roll-off ship according to claim 3, characterized in that, A connecting elbow plate is connected between the lower end face of the supplementary plate and the side of the vertical stiffener of the rib.
5. The through-structure for the ventilation duct of the ballast tank of a roll-on / roll-off ship according to claim 2, characterized in that, The vertical distance between the upper part of the vent pipe hole and the reverse side of the ballast tank floor plate located above it shall not be less than 100mm.
6. The through-type structure for the ballast tank ventilation duct of a roll-on / roll-off ship according to claim 1, characterized in that, When the venting duct is only inserted through the supplementary plate, the supplementary plate is located between two longitudinal ribs located in the same longitudinal plane, and the two sides of the supplementary plate are fixedly connected to the longitudinal ribs. The width of the supplementary plate is greater than the width of the longitudinal ribs, and venting duct holes are opened on the supplementary plate.
7. The through-type structure for ventilated ducts in ballast tanks of roll-on / roll-off ships according to claim 6, characterized in that, A reinforcing rib extending along the length of the longitudinal bone is provided at the joint between the supplementary plate and the longitudinal bone, with both ends of the reinforcing rib located on both sides of the joint between the supplementary plate and the longitudinal bone.
8. The through-type structure for ventilated ducts in ballast tanks of roll-on / roll-off ships according to claim 7, characterized in that, The supplementary plate is a bulb flat steel, and the reinforcing rib is a flat steel.