Tail fin inner cavity structure of double-tail-fin ship
By designing a stern fin inner cavity structure of a double-tail fin boat, abolishing the small manhole, enlarging the tail tube through holes, and tilting the vertical longitudinal truss toward the center line of the tail fin, the problems of inconvenient construction and insufficient passage space of the stern fin structure of the double-tail fin boat are solved, and the effect of increasing the moving space and simplifying construction is achieved.
Patent Information
- Application Number
- CN202421977448.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-08-15
AI Technical Summary
The stern fin line shape of the double-tail fin ship is thinner, which leads to inconvenient structure construction, narrow construction space, inappropriate intersection lines between the longitudinal truss and the outer plate, which affects construction and passage. In addition, the manhole layout in traditional structures is insufficient and easy to get stuck.
Design a stern fin inner cavity structure of a double-tail fin ship, cancel the small manholes on the transverse ribs and longitudinal trusses, enlarge the tail tube through holes on the transverse ribs, and use the space on the side far from the tail tube and the outer plate as the main channel to form a coherent passage space. At the same time, the vertical longitudinal truss is inclined along the longitudinal direction, close to the center line of the tail fin to enhance structural strength and facilitate construction and tail pipe installation.
By abolishing the small manhole and enlarging the tail pipe through holes, the margin of the moving space is increased, the construction difficulty is reduced, and the tail pipe installation is facilitated. At the same time, the construction workload is simplified on the basis of ensuring structural strength.
Smart Images
Figure CN222832986U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ships, in particular to a tail fin inner cavity structure of a double-tail fin ship. Background Art
[0002] Double fins are usually used for ships with wide and shallow draft, and the tail column is set at the end of the tail fin. Compared with conventional single-tail ships, the tail fin line of double fin ships is thinner, which causes inconvenience in structural construction, small construction space, and difficulty in arranging frame materials. The tail fin line is also affected by streamlines, and its center line is not symmetrical about the center of the tail axis, resulting in the outer plate on one side of the tail fin being close to the tail tube and occupying structural space.
[0003] In order to effectively bear the thrust transmitted from the propeller to the hull structure through the tail hub, longitudinal girders, namely horizontal longitudinal girders and vertical longitudinal girders, should be arranged at the tail fin in horizontal and vertical positions along the length of the ship, and the longitudinal girders need to be effectively welded to the tail hub cast steel.
[0004] In the traditional tail fin structure, transverse ribs are set at each rib position, longitudinal girders parallel to the propeller shaft are set at horizontal and vertical positions, and manholes are opened on the transverse ribs with larger web height and vertical longitudinal girders for passage. Figure 1 As shown, the horizontal longitudinal girder 51 and the vertical longitudinal girder 52 are both fixedly connected to the transverse ribs 50, the tail pipe 53 is passed through the transverse ribs 50, the transverse ribs are provided with manholes 61 and 62, and the vertical longitudinal girder is provided with a manhole 63.
[0005] However, in a twin-skeg ship, the lines are thinner, and the centerline of the skeg is not parallel to the propeller shaft. According to the traditional skeg structure design, two problems arise: first, there is insufficient space for arranging manholes for passage, especially on the vertical longitudinal girder. The manhole is too close to the outer plate and is easily stuck in the narrow space between the manhole and the outer plate; second, the vertical longitudinal girder arranged parallel to the propeller shaft is not parallel to the centerline of the skeg, which causes one side of the longitudinal girder to be close to the outer plate, affecting construction and passage, and the intersection line of the longitudinal girder and the outer plate is higher than the lowest point of the skeg where the structural stress is the largest at each rib position, and the outer plate is not effectively reinforced by the longitudinal girder. Utility Model Content
[0006] The technical problem to be solved by the utility model is to overcome the above-mentioned defects in the prior art and provide a tail fin inner cavity structure of a double-tail fin ship.
[0007] The utility model solves the above technical problems through the following technical solutions:
[0008] A tail fin inner cavity structure of a double-tail fin ship comprises transverse ribs arranged at various rib positions, horizontal longitudinal girders and vertical longitudinal girders are arranged between adjacent transverse ribs; the horizontal longitudinal girders and the vertical longitudinal girders are both fixedly connected to the transverse ribs; a tail pipe through hole for allowing a tail pipe to pass through is opened on the transverse ribs; the tail pipe passes through the tail pipe through hole; no manhole is arranged on the vertical longitudinal girders, and no manhole other than the tail pipe through hole is arranged on the transverse ribs; a passage space for allowing personnel to pass through is formed between the hole wall of the tail pipe through hole and the tail pipe, and the passage spaces on various transverse ribs are mutually connected in the length direction of the ship.
[0009] Furthermore, in the spaces on both sides of the tail tube in the tail tube through hole, the space on the side where the tail tube is farther away from the hull outer plate is used as a passage space.
[0010] Furthermore, in the hole wall of the tail pipe through hole, two sections of the hole wall respectively close to the outer plates of the hull on both sides are both straight-line hole walls, and the hole wall between the two straight-line hole walls is an arc-shaped hole wall.
[0011] Furthermore, there are two arc-shaped hole walls, and the two arc-shaped hole walls are respectively located above and below the straight hole wall.
[0012] Furthermore, of the two arc-shaped hole walls, the radius of the upper arc-shaped hole wall is smaller than the radius of the lower arc-shaped hole wall.
[0013] Furthermore, the hole wall of the tail pipe through hole is a non-axisymmetric geometric shape.
[0014] Furthermore, a panel is fixedly provided on the hole wall of the tail pipe through hole.
[0015] Furthermore, the panels are distributed circumferentially along the hole wall of the tail pipe through hole.
[0016] Furthermore, the vertical longitudinal girder is inclined in the longitudinal direction toward the center line of the tail fin.
[0017] Furthermore, the intersection line of the bottom of the vertical longitudinal girder and the hull outer plate is close to the lowest contour line of the tail fin.
[0018] The beneficial effects of the utility model are as follows: the tail fin inner cavity structure for a double tail fin ship of the utility model cancels the small manholes on the transverse ribs and the longitudinal girder, enlarges the through hole at the tail tube passing point on the transverse ribs, uses the space on the side of the tail tube far from the outer plate as the main passage, and the passable space is connected as a whole, thereby increasing the margin of the activity space. In the utility model, the tail tube through hole on the transverse rib runs along the outer plate, adopts a non-axisymmetric geometric shape surrounded by "straight line + arc", and there is still enough space for passage after deducting the space occupied by the tail tube passing through. The tail tube through hole specifications on each level of the transverse ribs can be kept consistent, thereby reducing the difficulty of construction. In the utility model, the vertical longitudinal girder is inclined in the longitudinal direction, as close to the center line of the tail fin as possible, so that the intersection line with the outer plate is close to the lowest contour line of the tail fin, while increasing the structural strength, the space size on both sides of the longitudinal girder is similar, which is convenient for construction and tail tube installation. The tail fin inner cavity structure for a double tail fin ship of the utility model reduces the construction workload while ensuring the structural strength, and is convenient for tail tube installation. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 Schematic diagram of a tail fin structure in the prior art.
[0020] Figure 2 This is a longitudinal section view of the tail fin of a preferred embodiment of the utility model.
[0021] Figure 3 for Figure 2 Middle AA section view.
[0022] Figure 4 for Figure 2 Middle BB cross-section.
[0023] Figure 5 for Figure 2 Middle CC section.
[0024] Figure 6 This is a rear view of the tail fin of a preferred embodiment of the utility model. DETAILED DESCRIPTION
[0025] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.
[0026] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a tail fin inner cavity structure of a double tail fin ship includes transverse ribs 10 arranged at each rib position, horizontal longitudinal girders 20 and vertical longitudinal girders 30 are arranged between adjacent transverse ribs; the horizontal longitudinal girders 20 and the vertical longitudinal girders 30 are both fixedly connected to the transverse ribs 10; a tail pipe through hole 11 for the tail pipe to pass through is opened on the transverse ribs 10; and the tail pipe 12 is passed through the tail pipe through hole 11.
[0027] No manhole is provided on the vertical longitudinal girder 30 , and no manhole other than the tail pipe through hole is provided on the transverse rib 10 .
[0028] A passage space 13 for people to pass through is formed between the hole wall of the tail pipe through hole 11 and the tail pipe 12, and the passage spaces on each transverse rib are interconnected in the length direction of the ship.
[0029] Among the spaces on both sides of the tail tube in the tail tube through hole 11, the space on the side where the tail tube is farther away from the hull outer plate is used as a passage space.
[0030] In the hole wall of the tail pipe through hole 11, two sections of the hole wall respectively close to the hull outer plates 40 on both sides are both straight-line hole walls, and the hole wall between the two straight-line hole walls is an arc-shaped hole wall.
[0031] There are two arc-shaped hole walls, which are respectively located above and below the linear hole wall. Among the two arc-shaped hole walls, the radius of the upper arc-shaped hole wall is smaller than the radius of the lower arc-shaped hole wall.
[0032] The hole wall of the tail pipe through hole 11 is a non-axisymmetric geometric shape.
[0033] A panel 14 is fixedly arranged on the hole wall of the tail pipe through hole 11. The panel 14 is distributed along the circumference of the hole wall of the tail pipe through hole.
[0034] like Figure 5 and Figure 6 As shown, the vertical longitudinal girder 30 is inclined in the longitudinal direction toward the center line of the tail fin; the intersection line 31 of the bottom of the vertical longitudinal girder and the outer plate of the hull is close to the lowest contour line 32 of the tail fin.
[0035] Figure 6 In the embodiment, the intersection line 33 of the horizontal longitudinal girder and the hull outer plate is located on the side of the tail tube 12.
[0036] The utility model discloses a tail fin inner cavity structure for a double-tail fin ship, eliminates small manholes on transverse ribs and longitudinal girder, enlarges the through hole at the transverse rib where the tail pipe passes through, utilizes the space on the side of the tail pipe far from the outer plate as the main passage, connects the passable space into one, and increases the margin of the activity space.
[0037] In the utility model, the tail pipe through hole on the transverse rib plate runs along the outer plate, and adopts a non-axisymmetric geometric shape surrounded by "straight line + circular arc". After deducting the space occupied by the tail pipe passing through, there is still enough space for passage. The specifications of the tail pipe through holes on the transverse rib plates of each level can be kept consistent, reducing the difficulty of construction.
[0038] In the utility model, the vertical longitudinal girder is inclined in the longitudinal direction and is as close to the center line of the tail fin as possible, so that the intersection line between the vertical girder and the outer plate is close to the lowest contour line of the tail fin. While increasing the structural strength, the space sizes on both sides of the longitudinal girder are similar, which is convenient for construction and tail tube installation.
[0039] The utility model discloses a tail fin inner cavity structure for a double-tail fin ship, which reduces the construction workload and facilitates the installation of the tail pipe while ensuring the structural strength.
[0040] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.
Claims
1. A tail fin inner cavity structure of a double tail fin ship, comprising transverse ribs arranged at each rib position, horizontal longitudinal girders and vertical longitudinal girders arranged between adjacent transverse ribs; the horizontal longitudinal girders and the vertical longitudinal girders are both fixedly connected to the transverse ribs; a tail pipe through hole for allowing the tail pipe to pass through is opened on the transverse ribs; the tail pipe is passed through the tail pipe through hole; characterized in that, No manhole is provided on the vertical longitudinal girder, and no manhole other than the stern tube through hole is provided on the transverse ribs; a passage space for personnel to pass through is formed between the hole wall of the stern tube through hole and the stern tube, and the passage spaces on each transverse rib are interconnected in the direction of the ship's length.
2. The tail fin inner cavity structure of the double tail fin boat according to claim 1, characterized in that: Among the spaces on both sides of the stern tube in the stern tube through hole, the space on the side where the stern tube is farther away from the hull outer plate is used as a passage space.
3. The tail fin inner cavity structure of the double tail fin boat according to claim 1, characterized in that: In the hole wall of the tail pipe through hole, two sections of the hole wall respectively close to the outer plates of the hull on both sides are both straight-line hole walls, and the hole wall between the two straight-line hole walls is an arc-shaped hole wall.
4. The tail fin inner cavity structure of the double tail fin boat according to claim 3, characterized in that: There are two arc-shaped hole walls, and the two arc-shaped hole walls are respectively located above and below the straight-line hole wall.
5. The tail fin inner cavity structure of the double tail fin boat according to claim 4, characterized in that: Of the two arc-shaped hole walls, the radius of the upper arc-shaped hole wall is smaller than the radius of the lower arc-shaped hole wall.
6. The tail fin inner cavity structure of a double tail fin boat according to claim 1, characterized in that: The hole wall of the tail pipe through hole is a non-axisymmetric geometric shape.
7. The tail fin inner cavity structure of a double tail fin boat according to claim 1, characterized in that: A panel is fixedly arranged on the hole wall of the tail pipe through hole.
8. The tail fin inner cavity structure of the double tail fin boat according to claim 7, characterized in that: The panels are distributed circumferentially along the hole wall of the tail pipe through hole.
9. The tail fin inner cavity structure of a double tail fin boat according to claim 1, characterized in that: The vertical longitudinal girder is inclined longitudinally toward the center line of the tail fin.
10. The tail fin inner cavity structure of a double tail fin boat according to claim 9, characterized in that: The intersection line of the bottom of the vertical longitudinal girder and the hull outer plate is close to the lowest contour line of the tail fin.