An adaptive anti-collision device for the ship chamber of a ship lift

Abstract

An adaptive anti-collision device for the ship chamber of a ship lift, which is composed of a collision avoidance beam and rotating support structures at both ends. According to the distribution law that the structural stress caused by the impact of the ship gradually decreases from the middle to both ends, the main structure of the collision avoidance beam adopts a variable cross-section type with a thick middle and thin ends, so as to reduce the stress level at the middle impact part. Rotating support structures are arranged at both ends of the collision avoidance beam, so that the collision avoidance beam can automatically adapt to the inclined plane angle of the ship when being impacted by the ship, realize the surface contact impact between the ship's bow and the collision avoidance beam, reduce the stress of the ship and the impact part of the collision avoidance beam, and solve the problem that the point contact stress seriously exceeds the standard.

Description

Technical Field

[0001] The present invention relates to a device, specifically an adaptive anti-collision device for the ship chamber of a ship lift, belonging to the field of high dam navigation. Background Art

[0002] A ship lift is a navigation structure that can overcome concentrated water level drops and provide fast dam crossing for ships, especially suitable for high dam navigation with a water head of more than 70m. In recent years, the development of large ship lifts in China has been rapid, and several modern large ship lifts have been completed and put into operation one after another. A ship lift is a complex system involving multiple disciplines such as hydraulic engineering, metal structure, machinery, electricity, and hydraulics, and operation safety is a key concern. The ship chamber of a ship lift is the carrier of the ship, and the ship chamber doors at both ends are important facilities to keep the water body and weight in the ship chamber unchanged. Once the ship chamber door is damaged and the ship chamber leaks, the balance of the ship lift will be broken, leading to serious consequences. During the process of a ship entering and leaving the ship chamber and berthing in the chamber, it may hit the ship chamber door due to stalling. Therefore, in order to prevent a stalled ship from hitting, anti-collision devices are arranged on the inner sides of the ship chamber doors at both ends of the ship chamber. At present, the anti-collision devices mainly include two types: anti-collision ropes and anti-collision beams. Among them, the anti-collision beam absorbs the impact energy of the ship by the elastic-plastic deformation of its own structure. The prominent advantage of the anti-collision beam is that the buffer distance of the ship is relatively small, and it does not occupy the effective water area of the ship chamber in terms of layout. It is the most widely used type in large ship lifts at present.

[0003] It is crucial to ensure the reliability and effectiveness of the anti-collision device. During the process of testing the performance of the anti-collision beam in resisting ship impacts, it is found that there are obvious problems with the current anti-collision beam structure. The front part of the ship is all inclined planes. When hitting the horizontally arranged anti-collision beam, it is only a point contact, not a line or a surface contact, resulting in serious over-standard local stress of the anti-collision beam, large plastic deformation, while the stress in other positions is relatively small, and the anti-collision effect is poor. Both the anti-collision beam and the ship are prone to damage. Generally speaking, the current anti-collision beam structure cannot fully play the anti-collision function, and it is necessary to propose a new anti-collision device to make up for the deficiencies in the design of the current anti-collision device. Summary of the Invention

[0004] Aiming at the obvious deficiencies in the design of the anti-collision device for the ship chamber of a ship lift, the present invention proposes an adaptive anti-collision device for the ship chamber of a ship lift to fully play the function of the anti-collision device and improve its reliability.

[0005] The technical solution of the present invention to achieve the above object is: The anti-collision device is composed of an anti-collision beam and two end rotating support structures. According to the distribution law that the structural stress caused by ship impact gradually decreases from the middle to both ends, the main structure of the anti-collision beam adopts a variable cross-section type with a thick middle and thin ends to reduce the stress level at the middle impact part. Rotating support structures are arranged at both ends of the anti-collision beam, enabling the anti-collision beam to automatically adapt to the inclined plane angle of the ship when being impacted by the ship, realizing the surface contact impact between the bow of the ship and the anti-collision beam, reducing the stress at the impact parts of the ship and the anti-collision beam, and solving the problem of seriously exceeding the point contact stress.

[0006] The main structure of the anti-collision beam is a box girder structure with a square cross-section composed of four identical steel plates. The outer surfaces of the steel plates are all flat, and a buffer rubber block is arranged on each of the four outer surfaces. The inner surface is an inclined plane linearly changing from the middle to both ends, forming a variable cross-section structure type with a thick middle and thin ends.

[0007] The two end rotating support structures are placed in the gate grooves on both sides of the ship chamber and are composed of sliders, supports, and rotating shafts. The rotating shafts are rigidly connected to the main structure of the anti-collision beam, enabling the anti-collision beam to rotate arbitrarily by 360° along the central axis. The sliders are restricted by the gate grooves and will transfer the impact load to the ship chamber.

[0008] The present invention has the following outstanding advantages:

[0009] (1) Optimize the overall stress distribution of the anti-collision beam;

[0010] (2) Solve the stress concentration problem caused by point contact in the traditional anti-collision beam structure;

[0011] (3) Eliminate the torsional load of the anti-collision beam under the ship impact load, and improve the reliability and safety of the anti-collision beam. Description of the Drawings

[0012] Figure 1 It is the horizontal section and overall layout drawing of the original anti-collision device;

[0013] Figure 2 It is the cross-sectional drawing of the original anti-collision device;

[0014] Figure 3 It is the cross-sectional view of the supports at both ends of the original anti-collision device;

[0015] Figure 4 It is the state schematic diagram of the original anti-collision device when being impacted by the ship;

[0016] Figure 5 It is the horizontal section and overall layout drawing of the anti-collision device of the present invention;

[0017] Figure 6 It is the cross-sectional drawing of the middle part of the anti-collision device of the present invention;

[0018] Figure 7 It is a cross-sectional view of both ends of the anti-collision device of the present invention;

[0019] Figure 8 It is a cross-sectional view of the supports at both ends of the anti-collision device of the present invention;

[0020] Figure 9 It is a schematic diagram of the state of the anti-collision device of the present invention when colliding with a ship. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] Embodiment 1

[0023] This embodiment is a 500t large ship lift, the effective water area of ​​the ship compartment is 58m long, 12m wide, and 2.5m deep, and 500t ships can navigate. An anti-collision device is arranged at each end of the ship compartment to prevent the ship from hitting the compartment door. Figure 1 for Figure 1 This is the horizontal section and overall layout of the original anti-collision device. Figure 2 is the cross-sectional view of the original anti-collision device. Figure 3 This is the cross-sectional view of the two end supports of the original anti-collision device. Figure 4 This is a schematic diagram of the state of the original anti-collision device when a ship collides with it. Figure 5 is a horizontal section and overall layout diagram of the anti-collision device of the present invention, Figure 6 is a cross-sectional view of the middle part of the anti-collision device of the present invention, Figure 7 It is a cross-sectional view of both ends of the anti-collision device of the present invention, Figure 8 It is a cross-sectional view of the two end supports of the anti-collision device of the present invention, Figure 9 It is a schematic diagram of the state of the anti-collision device of the present invention when a ship collides, wherein 1 is a ship compartment, 2 is a ship compartment door, 3 is the main structure of the anti-collision beam, 4 is a buffer rubber block, 5 is a support, 6 is a slider, 7 is a door slot, 8 is a bow, and 9 is a rotating shaft.

[0024] If the original anti-collision device solution is adopted, the main structure 3 of the anti-collision beam is an equal-section frame structure with a rectangular cross-section, and there are buffer rubber blocks 4 only on the front and rear sides. The main structure 3 of the anti-collision beam is rigidly connected to the supports 5 at both ends. The anti-collision beam is constrained by the door groove 7 and cannot rotate. When hit by the bow 8, it is in point contact with the anti-collision beam, resulting in serious excessive stress at the impact point in the middle of the anti-collision beam and large plastic deformation. It is also unfavorable to the force at the impact point of the ship, and the anti-collision device cannot achieve the ideal anti-collision effect.

[0025] If the anti-collision device solution of the present invention is adopted, the anti-collision device is composed of an anti-collision beam and two end rotating support structures. According to the distribution law that the structural stress caused by ship impact gradually decreases from the middle to both ends, the main structure 3 of the anti-collision beam adopts a variable cross-section type with a thick middle and thin ends to reduce the stress level at the middle impact part. Rotating support structures are arranged at both ends of the anti-collision beam so that the anti-collision beam can automatically adapt to the inclined plane angle of the ship when being impacted by the ship, realizing the surface contact impact between the bow of the ship and the anti-collision beam, reducing the stress of the ship and the impact part of the anti-collision beam, and solving the problem of seriously exceeding the standard of point contact stress. The main structure 3 of the anti-collision beam is a box girder structure with a square cross-section composed of four identical steel plates. The outer surfaces of the steel plates are all flat, and a buffer rubber block 4 is arranged on each of the four outer surfaces. The inner surface is an inclined plane linearly changing from the middle to both ends, forming a variable cross-section structure type with a thick middle and thin ends. The two end rotating support structures are placed in the gate slots 7 on both sides of the ship chamber and are composed of a slider 6, a support 5, and a rotating shaft 9. The rotating shaft 9 is rigidly connected to the main structure 3 of the anti-collision beam, enabling the anti-collision beam to rotate arbitrarily 360° along the central axis. The slider 6 is restricted by the gate slot 7 and will transfer the impact load to the ship chamber 1. When being impacted by the bow 8, the anti-collision beam automatically adapts to the inclined plane angle of the bow 8, and the impact between the anti-collision beam and the bow is a surface contact impact, greatly improving the stress condition of the anti-collision beam.

[0026] After adopting the present invention, the stress distribution of the anti-collision beam of the ship chamber is significantly optimized, effectively solving the stress concentration problem caused by point contact of the traditional anti-collision beam structure, and significantly improving the reliability and safety of the anti-collision beam.

Claims

1. An adaptive anti-collision device for the ship chamber of a ship lift, characterized in that: The anti-collision device consists of an anti-collision beam and rotating support structures at both ends. The main structure of the anti-collision beam adopts a variable cross-section type with a thicker middle and thinner ends. Rotating support structures are arranged at both ends of the anti-collision beam, enabling the anti-collision beam to automatically adapt to the inclined plane angle of the ship when being impacted by the ship, and realizing the surface contact impact between the bow of the ship and the anti-collision beam. The main structure of the anti-collision beam is a box girder structure with a square cross-section composed of four identical steel plates. The outer surfaces of the steel plates are all flat. A buffer rubber block is arranged on each of the four outer surfaces of the main body of the anti-collision beam, and the inner surface is an inclined plane linearly changing from the middle to both ends, forming a variable cross-section structure type with a thicker middle and thinner ends. The rotating support structures at both ends are placed in the door grooves on both sides of the ship's cabin and consist of sliders, supports, and rotating shafts. The rotating shafts are rigidly connected to the main structure of the anti-collision beam, enabling the anti-collision beam to rotate arbitrarily by 360° along the central axis.

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