Ro-ro ship stairway structure

Abstract

The present invention discloses a stairway structure for a car ro-ro ship, which comprises two transverse bulkheads. A longitudinal bulkhead is fixedly arranged between the two transverse bulkheads. The ship outer plate, the longitudinal bulkhead and the two transverse bulkheads enclose a stairway cavity for accommodating a stairway. An anti-heeling water tank is further arranged inside the ship outer plate. The top of the anti-heeling water tank is a water tank top plate. The stairway cavity is arranged above the anti-heeling water tank. The bottoms of the longitudinal bulkhead and the transverse bulkheads are both fixedly connected to the upper surface of the water tank top plate. There are several transverse strong frames in the anti-heeling water tank. The two transverse bulkheads are respectively aligned with the two transverse strong frames. The projection of the stairway cavity on the horizontal plane does not exceed the projection range of the anti-heeling water tank on the horizontal plane. While meeting the functional requirements, the present invention reduces the transverse deformation of the hull structure, improves the fatigue performance of the hull structure, increases the fatigue strength of the key joints of the whole ship, and enhances the safety margin of the hull.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and particularly relates to a stairway structure for a car roll-on / roll-off ship. Background Art

[0002] The cargo hold stairway of a car roll-on / roll-off ship is generally arranged on the freeboard deck in the middle area of the ship to facilitate the pilot's going up and down.

[0003] The anti-heeling water tank of a car roll-on / roll-off ship is a ballast water tank used to prevent the ship from heeling. The anti-heeling water tank structure is generally located below the freeboard deck.

[0004] At present, the stairway enclosure and the anti-heeling water tank are independent of each other, and they are respectively independent structures. The structure of the stairway and the anti-heeling water tank only respectively meet the functional requirements of the hull. The structures of both only meet the functional requirements and do not consider the requirements of the transverse strength of the hull structure. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above-mentioned defects existing in the prior art and provide a stairway structure for a car roll-on / roll-off ship.

[0006] The present invention solves the above technical problem through the following technical solutions:

[0007] A stairway structure for a car roll-on / roll-off ship, which includes a transverse enclosure fixedly connected to the inner side of the ship outer plate. There are two transverse enclosures, and a longitudinal enclosure is fixedly arranged between the two transverse enclosures; the ship outer plate, the longitudinal enclosure and the two transverse enclosures enclose a stairway cavity for accommodating the stairway; an anti-heeling water tank is also arranged on the inner side of the ship outer plate; the top of the anti-heeling water tank is a water tank top plate fixedly connected to the ship outer plate; the stairway cavity is arranged above the anti-heeling water tank; the bottom of the longitudinal enclosure and the bottom of the transverse enclosure are both fixedly connected to the upper surface of the water tank top plate; there are several transverse strong frames in the anti-heeling water tank; the two transverse enclosures are respectively aligned with the two transverse strong frames; the projection of the stairway cavity on the horizontal plane does not exceed the projection range of the anti-heeling water tank on the horizontal plane.

[0008] The cross-section of the stairway cavity is rectangular.

[0009] The width of the projection of the stairway cavity on the horizontal plane is not greater than the width of the projection of the anti-heeling water tank on the horizontal plane; the length of the projection of the stairway cavity on the horizontal plane is not greater than the length of the projection of the anti-heeling water tank on the horizontal plane.

[0010] The side wall of the anti-heeling water tank is a longitudinally distributed water tank side bulkhead, and a water tank front bulkhead and a water tank rear bulkhead are arranged between the water tank side bulkhead and the ship outer plate; the water tank side bulkhead, the water tank top plate, the water tank front bulkhead, the water tank rear bulkhead and the ship outer plate enclose the anti-heeling water tank.

[0011] The longitudinal enclosure is aligned with the water tank side bulkhead.

[0012] Alternatively, the longitudinal bulkhead is located between the side bulkhead of the water tank and the outer hull plate.

[0013] Furthermore, the longitudinal bulkhead is parallel to the side bulkhead of the water tank.

[0014] Both of the two transverse bulkheads are located between the front bulkhead and the rear bulkhead of the water tank.

[0015] Alternatively, one of the transverse bulkheads is aligned with the front bulkhead of the water tank, and the other transverse bulkhead is located between the front bulkhead and the rear bulkhead of the water tank.

[0016] Alternatively, one of the transverse bulkheads is aligned with the rear bulkhead of the water tank, and the other transverse bulkhead is located between the front bulkhead and the rear bulkhead of the water tank.

[0017] The beneficial effects of the present invention are as follows: The present invention adopts an integral stairway bulkhead structure, which reduces the lateral deformation of the hull structure as a whole while meeting the functional requirements. It not only reduces the overall stress level of the hull frame, but also greatly improves the fatigue performance of the hull structure, increases the fatigue strength of the key joints of the whole ship, and enhances the safety margin of the hull. Description of the Drawings

[0018] Figure 1 It is a top view of a preferred embodiment of the present invention.

[0019] Figure 2 is Figure 1 Schematic cross-sectional view taken along line A-A in Detailed Embodiments

[0020] The following is a preferred embodiment, and the present invention will be described more clearly and completely in conjunction with the drawings.

[0021] As Figure 1 and Figure 2 shown, a stairway structure of a car carrier includes a transverse bulkhead 21 fixedly connected to the inner side of the outer hull plate 10. There are two transverse bulkheads 21, and a longitudinal bulkhead 22 is fixedly provided between the two transverse bulkheads 21; the outer hull plate 10, the longitudinal bulkhead 22 and the two transverse bulkheads 21 enclose a stairway cavity 20 for accommodating a stairway. In this embodiment, the cross-section of the stairway cavity 20 is rectangular.

[0022] An anti-heeling water tank 30 is also provided on the inner side of the outer hull plate 10; the top of the anti-heeling water tank 30 is a water tank top plate 31 fixedly connected to the outer hull plate.

[0023] The stairway cavity 20 is arranged above the anti-heeling water tank 30.

[0024] The bottom of the longitudinal bulkhead 22 and the bottom of the transverse bulkhead 21 are both fixedly connected to the upper surface of the water tank top plate 31.

[0025] There are several transverse strong frames 35 inside the anti - rolling water tank 30; two transverse bulkheads 21 are respectively aligned with two of the transverse strong frames.

[0026] The projection of the stairway cavity 20 on the horizontal plane does not exceed the projection range of the anti - rolling water tank 30 on the horizontal plane. Specifically, the width of the projection of the stairway cavity 20 on the horizontal plane is not greater than the width of the projection of the anti - rolling water tank 30 on the horizontal plane; the length of the projection of the stairway cavity 20 on the horizontal plane is not greater than the length of the projection of the anti - rolling water tank 30 on the horizontal plane.

[0027] In this embodiment, the width of the projection of the stairway cavity 20 on the horizontal plane is equal to the width of the projection of the anti - rolling water tank 30 on the horizontal plane; the length of the projection of the stairway cavity 20 on the horizontal plane is less than the length of the projection of the anti - rolling water tank 30 on the horizontal plane.

[0028] The side wall of the anti - rolling water tank 30 is the longitudinally distributed water tank side bulkhead 32. There are a water tank front bulkhead 33 and a water tank rear bulkhead 34 between the water tank side bulkhead 32 and the ship's outer plate 10; the water tank side bulkhead 32, the water tank top plate 31, the water tank front bulkhead 33, the water tank rear bulkhead 34 and the ship's outer plate 10 enclose the anti - rolling water tank 30.

[0029] In this embodiment, the longitudinal bulkhead 22 is aligned with the water tank side bulkhead 32.

[0030] In another embodiment, the longitudinal bulkhead is located between the water tank side bulkhead and the ship's outer plate; the longitudinal bulkhead is parallel to the water tank side bulkhead.

[0031] In this embodiment, both of the two transverse bulkheads 21 are located between the water tank front bulkhead 33 and the water tank rear bulkhead 34.

[0032] In another embodiment, one of the transverse bulkheads is aligned with the water tank front bulkhead, and the other transverse bulkhead is located between the water tank front bulkhead and the water tank rear bulkhead.

[0033] In yet another embodiment, one of the transverse bulkheads is aligned with the water tank rear bulkhead, and the other transverse bulkhead is located between the water tank front bulkhead and the water tank rear bulkhead.

[0034] In the present invention, the transverse bulkhead and the longitudinal bulkhead enclosing the stairway cavity are arranged above the anti - rolling water tank. The width of the transverse bulkhead is not greater than the width of the anti - rolling water tank, and the two transverse bulkheads are respectively aligned with the transverse strong frames of the anti - rolling water tank below, thereby overall improving the transverse stiffness of the hull.

[0035] Through finite element analysis, for the stairway structure of the car - carrying roll - on / roll - off ship of the present invention, the overall transverse deformation of the hull is reduced by about 10%, and the fatigue life of the key nodes is increased by about 20%.

[0036] The present invention adopts an integrated stairway bulkhead structure, which, while meeting the functional requirements, generally reduces the lateral deformation of the hull structure, not only reducing the overall stress level of the hull frame, but also greatly improving the fatigue performance of the hull structure, enhancing the fatigue strength of the key joints of the whole ship, and increasing the safety margin of the hull.

[0037] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. An automotive ro-ro ship stairway structure, which includes a transverse bulkhead fixedly connected to the inner side of the ship's outer plate. There are two transverse bulkheads, and a longitudinal bulkhead is fixedly arranged between the two transverse bulkheads; the ship's outer plate, the longitudinal bulkhead, and the two transverse bulkheads enclose a stairway cavity for accommodating the stairway; a transverse inclination prevention water tank is also arranged on the inner side of the ship's outer plate; the top of the transverse inclination prevention water tank is a water tank roof plate fixedly connected to the ship's outer plate; characterized in that, The stairway cavity is arranged above the anti-heeling water tank; the bottoms of the longitudinal bulkhead and the transverse bulkhead are both fixedly connected to the upper surface of the water tank top plate; there are several transverse strong frames in the anti-heeling water tank; the two transverse bulkheads are respectively aligned with the two transverse strong frames; the projection of the stairway cavity on the horizontal plane does not exceed the projection range of the anti-heeling water tank on the horizontal plane; the width of the projection of the stairway cavity on the horizontal plane is not greater than the width of the projection of the anti-heeling water tank on the horizontal plane; the length of the projection of the stairway cavity on the horizontal plane is not greater than the length of the projection of the anti-heeling water tank on the horizontal plane; the side wall of the anti-heeling water tank is the longitudinally distributed water tank side bulkhead, and there are a water tank front bulkhead and a water tank rear bulkhead between the water tank side bulkhead and the ship's outer plate; the water tank side bulkhead, the water tank top plate, the water tank front bulkhead, the water tank rear bulkhead and the ship's outer plate enclose the anti-heeling water tank.

2. The stairway structure of the ro-ro ship for automobiles according to claim 1, wherein The cross-section of the stairway cavity is rectangular.

3. The ramp structure of the pure car and truck carrier according to claim 1, characterized in that, The longitudinal bulkhead is aligned with the water tank side bulkhead.

4. The stairway structure of the ro-ro ship for automobiles according to claim 1, characterized in that, The longitudinal bulkhead is located between the water tank side bulkhead and the ship's outer plate.

5. The gangway structure of the ro-ro passenger ship for automobiles according to claim 4, wherein The longitudinal bulkhead is parallel to the water tank side bulkhead.

6. The stairway structure of the ro-ro ship for automobiles according to claim 1, characterized in that, Both of the two transverse bulkheads are located between the water tank front bulkhead and the water tank rear bulkhead.

7. The stairway structure of the ro-ro ship for automobiles according to claim 1, characterized in that, One of the transverse bulkheads is aligned with the water tank front bulkhead, and the other transverse bulkhead is located between the water tank front bulkhead and the water tank rear bulkhead.

8. The stairway structure of the ro-ro ship for automobiles according to claim 1, wherein, One of the transverse bulkheads is aligned with the water tank rear bulkhead, and the other transverse bulkhead is located between the water tank front bulkhead and the water tank rear bulkhead.

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