A mobile modular lifting platform for a large ship lift

Abstract

The present invention discloses a mobile modular lifting platform for a large ship lift, which relates to the technical field of ship lifts in ships and marine engineering, including a shore base, a lifting platform, a ship, a lifting winch, a walking transfer trolley group, a bracket, a track and a shore-based ferry bridge. The lifting platform includes a plurality of lifting platform units and a main longitudinal beam of an active platform and a main transverse beam of an active platform connected by welding, and each lifting platform unit is arranged in parallel and connected. The lifting platform is provided with extended straight legs on both sides, and a cylindrical hinge pair for articulating a driven platform is provided on the extended straight legs, and the driven platform is connected to the active platform through the cylindrical hinge pair. At this time, the entire platform is connected into a whole, but there can still be a certain relative rotation between the active platform and the driven platform, and at the same time, the internal stress of the entire platform can be reduced, showing a certain fluidity. Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: (1) simple structure, high efficiency of component installation and debugging, and convenient disassembly and assembly. (2) The internal stress of the entire platform is small, showing a certain fluidity, long service life, and not easy to be damaged. (3) The overall weight is light, the construction cost and maintenance cost are simple and low, and the equipment reliability is good.

Description

Technical Field

[0001] The invention relates to the technical field of ship lifts for ships and marine engineering, and in particular to a mobile modular lifting platform for a large ship lift. Background Art

[0002] The ship lift is a set of hydraulic lifting machinery that uses mechanical devices to lift and lower ships, overcome the vertical drop, and enable ships to achieve navigation, repair, maintenance, launching and other purposes. The ship lifts used in shipyards are mainly dry-type ship lifts. After the ship lift equipment lifts the ship on the lifting platform out of the water through the lifting system, it transfers the ship to the ground maintenance position for inspection, maintenance and maintenance through the hydraulic walking transfer trolley and the track parallel to the ground. Compared with the traditional pit dock, the ship lift can send the ship to different maintenance positions through the vertical cross track on the shore, so that the manufacturing and maintenance of the ship is not limited to the pit dock, thereby greatly improving the work position and efficiency of the shipyard. At the same time, the construction and maintenance environment of the shore dock has also been greatly improved compared to the pit dock.

[0003] The existing technology is: it is necessary to build a cofferdam around the concrete trestle on site and build an assembly site, and then hoist the platform into sections for assembly and welding. Then carry out overall debugging of dozens of lifting points. The construction cost is high, the construction period is long, there is difficulty in ensuring the quality of welding of the off-site welding manufacturing part, the overall debugging is difficult, the overall weight of the platform is large, and the platform maintenance is difficult. The mobile modular lifting platform and its installation method designed in this paper can overcome the above-mentioned shortcomings of the existing lifting platform.

[0004] Although there are new lifting platforms that are connected by bolts after improvement, such as patent number CN 110725296A, the lifting platform is still an integral steel structure, which needs to be assembled on site during installation, so it is necessary to build a temporary cofferdam on the coast, which is costly and slow. At the same time, the integral steel structure lifting platform has high requirements for overall rigidity, resulting in heavy weight, high construction difficulty, and difficulty in simultaneous debugging of multiple lifting points. Summary of the invention

[0005] 1. Technical problem to be solved by the invention

[0006] In response to the technical problem, the present invention provides a mobile modular lifting platform for a large ship lift. It has a simple structural design, high modular design production efficiency, does not require the construction of temporary cofferdams during installation, has a small dead weight, is convenient for debugging and installation, and has high efficiency. The overall internal stress of the platform is small, it exhibits a certain degree of fluidity, has a long service life, is not easy to damage, can reduce construction costs and maintenance costs, and improves the reliability of the equipment.

[0007] 2. Technical solution

[0008] To solve the above problems, the technical solution provided by the present invention is:

[0009] A mobile modular lifting platform for a large ship lift includes a shore base, a lifting platform, a ship, a lifting winch, a walking transfer trolley group, a bracket, a track and a shore-based ferry bridge. The lifting platform is connected to the land through the shore base. The lifting platform includes multiple lifting platform units and a main longitudinal beam and a main transverse beam of an active platform connected by welding. Each lifting platform unit is arranged in parallel and connected, and is located on the main longitudinal beam of the active platform; the ship is located above the lifting platform, and multiple groups of lifting winches are fixedly connected in the middle of the shore base. The lifting winches are movably connected to the lifting platform. Tracks compatible with the walking transfer trolley group are provided on the shore base and the lifting platform. A bracket and a driven platform for supporting the ship are provided above the active platform; a shore-based ferry bridge is provided between the shore base and the lifting platform; the walking transfer trolley is located between the track and the driven platform; and straight legs are provided on both sides of the lifting platform, and cylindrical hinge pairs for articulating the driven platform are provided on the straight legs. The modular mobile lifting platform is formed by alternately overlapping the active platform and the driven platform welded from steel structures. The width of the active platform and the driven platform can be designed to be different according to the weight distribution of the maximum ship to be lifted. The active platform is a frame structure welded by two main longitudinal beams and several main cross beams. The main longitudinal beam is a variable-section box beam structure, with bayonet holes designed at both ends, which can be connected to the pins of the lifting system. The pins are connected by wire ropes and are the main force-bearing structure of the platform. The active platform has two main longitudinal beams, on which four lifting points are provided for simultaneous lifting. The lifting platform unit is very small relative to the entire lifting platform, so the lifting platform unit is also very convenient to disassemble and assemble, and this can facilitate production and manufacturing. The driven platform is connected to the active platform through a cylindrical hinge pair. At this time, the entire platform is connected as a whole, but there can still be a certain relative rotation between the active platform and the driven platform, and at the same time, the internal stress of the platform as a whole can be reduced, showing a certain fluidity, so it is called a fluid lifting platform. The lifting winch can lift the active platform up or down, and the active platform moves with the ship, thus realizing the rise or fall of the ship. The walking transfer trolley moves in the track. When it enters and exits the lifting platform, it will cause a large deformation of the lifting platform. When the walking transfer trolley is moving, the shore-based ferry bridge provides a smooth transition between the shore and the lifting platform. The walking transfer trolley can lift the driven platform, together with the bracket and the ship.

[0010] Optionally, the spacing of the lifting platform units is adjustable, and the lifting platform includes a first active platform and a second active platform, and the lifting platform units of the first active platform and the second active platform have different distribution spacings. The lifting platform units have different distribution spacings, and their unit force areas are also different. The spacing can be flexibly adjusted to adapt to different weights of different parts of the ship, thereby ensuring the stability of the lifting platform and extending the service life of the lifting platform.

[0011] Optionally, a driven platform is provided between the bracket and the lifting platform, the driven platform includes multiple driven platform units, the driven platform units include a middle driven platform and a bypass driven platform, the middle driven platform and the bypass driven platform are connected in an "I" shape, and a ship fixing device is provided on the driven platform unit.

[0012] Optionally, the driven platform includes a driven platform unit, the spacing between the driven platform units is an adjustable spacing, a first driven platform and a second driven platform, and the positions of the first driven platform unit and the second driven platform unit correspond to the positions of the first active platform unit and the second active platform unit, respectively. The position of the driven platform unit corresponds to the position of the active platform unit to facilitate force.

[0013] Optionally, the hoisting winch is movably connected to the lifting platform through a pulley block and a steel wire rope, and a motor for providing power is provided in the hoisting winch. The active platform is hoisted through a steel wire rope on the pin of the reduction pulley block of the hoisting winch, and pin interfaces are provided on both sides of the active platform for connecting with the steel wire rope.

[0014] Optionally, the walking transfer trolley group includes a plurality of walking transfer trolleys, which are fixedly connected to each other, and a motor for providing moving power and lifting power is provided in the walking transfer trolley. The walking transfer trolley group is in the shape of two rows of long strips as a whole, which is adapted to the shape of the driven platform, so that it is easy to bear force. The walking transfer trolley is provided with a longitudinal cylinder, which can lift the bracket and the ship longitudinally, so that the ship bracket is separated from the lifting platform.

[0015] Optionally, the walking transfer trolley is provided with a jacking column, the movement direction of the jacking column is longitudinal, and the walking transfer trolley is provided with a guide wheel disc that can rotate in the plane direction of the shore base, and the guide wheel disc is provided with a guide wheel. The longitudinal oil cylinder on the walking transfer trolley can also push the jacking device downward, and the guide wheel disc is in an empty state, so that the guide wheel disc is rotated to change the direction of the guide wheel, and the trolley can move horizontally.

[0016] As an option, an active platform main cross beam is provided between the active platform main longitudinal beams, and bracket fixing support points are marked on the active platform main longitudinal beams. The active platform main cross beam can strengthen the overall structural strength, and the bracket fixing support points can facilitate the staff to calibrate the force points, so that the lifting platform is scientifically stressed, the service life is extended, and the maximum load of the lifting platform is increased.

[0017] Optionally, oblique beams are provided between the main longitudinal beams of the active platform. Due to the stability of the triangle, the oblique beams can enhance the overall structural strength.

[0018] As an option, the tracks on the shore are cross-distributed in a "well" shape. The walking transfer trolley needs to move horizontally on the shore to place the ship. The "well"-shaped track makes the walking transfer trolley move conveniently and accurately.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0021] (1) The embodiment of the present application proposes a mobile modular lifting platform for a large ship lift, which has a simple structure, high efficiency in installation and debugging of parts, and convenient assembly and disassembly.

[0022] (2) The embodiment of the present application proposes a mobile modular lifting platform for a large ship lift, which has low internal stress, exhibits certain fluidity, has a long service life, and is not easy to damage.

[0023] (3) The mobile modular lifting platform for a large ship lift proposed in the embodiment of the present application has a light overall weight, simple construction cost, low maintenance cost, and good equipment reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a mobile modular lifting platform of a large ship lift proposed in an embodiment of the present invention;

[0025] Figure 2 A front view of a mobile modular lifting platform of a large ship lift proposed in an embodiment of the present invention;

[0026] Figure 3 A top view of a mobile modular lifting platform of a large ship lift proposed in an embodiment of the present invention;

[0027] Figure 4 A side view of a mobile modular lifting platform of a large ship lift proposed in an embodiment of the present invention;

[0028] Figure 5 A partial top view of a mobile modular lifting platform of a large ship lift proposed in an embodiment of the present invention;

[0029] Figure 6 A schematic structural diagram of an active platform of a mobile modular lifting platform of a large ship lift proposed in an embodiment of the present invention;

[0030] Figure 7 A side view of a partial structure of a mobile modular lifting platform of a large ship lift proposed in an embodiment of the present invention;

[0031] Figure 8 A structural diagram of a walking transfer trolley of a mobile modular lifting platform of a large ship lift proposed in an embodiment of the present invention;

[0032] Fig. 9A schematic structural diagram of a pin shaft interface of a mobile modular lifting platform of a large ship lift proposed in an embodiment of the present invention.

[0033] Explanation of symbols in the figure:

[0034] 1. Shore base; 2. Lifting platform; 3. Ship; 4. Lifting winch; 5. Travel transfer trolley; 6. Bracket; 7. Track; 8. Shore-based ferry; 9. First active platform; 10. First driven platform; 11. Second active platform; 12. Second driven platform; 13. Cylindrical hinge pair; 14. Extended straight leg; 15. Guide wheel; 16. Pin interface; 17. Main crossbeam of active platform; 18. Main longitudinal beam of active platform; 19 Bracket fixed support point; 20. Middle driven platform; 21. Driven platforms on both sides. DETAILED DESCRIPTION

[0035] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0036] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the invention are shown in the accompanying drawings. The words "first", "second", etc. described in the present invention are set for the convenience of describing the technical solution of the present invention, and have no specific limiting effect. They are all general references and do not constitute a limiting effect on the technical solution of the present invention. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Multiple technical solutions in the same embodiment, and multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions without contradictions or conflicts, all of which are within the scope of protection required by the present invention.

[0037] Example

[0038] Combined with Figure 1-9 The lifting platform 2 is formed by alternately overlapping an active platform and a driven platform welded from a steel structure. The widths of the active platform and the driven platform can be designed to be different widths according to the weight distribution of the maximum ship to be lifted. In this example, two widths of platforms are built and connected, but the present invention is not limited to this.

[0039] The active platform is a frame structure formed by welding two active platform main longitudinal beams 18 and several active platform main cross beams 17. The active platform main longitudinal beam 18 is a variable-section box beam structure, with bayonet holes designed at both ends, which can be connected to the pins of the lifting system and are the main force-bearing structure of the platform. The active platform has two main longitudinal beams for four lifting points to lift at the same time. Tracks 7 are designed on the upper surface of the active platform main cross beam 17. The number and position of the active platform main cross beams can be arranged according to the ships to be lifted and transferred. This example shows four cross beams and their four tracks, but the present invention is not limited to this. The active platform main longitudinal beam 18 is also provided with a bracket fixing support point 19 to provide support for the bracket at a fixed position. The remaining positions of the platform can be provided with corresponding support structures such as walking forklifts, sidewalks, etc. as needed.

[0040] The driven platform is provided with semicircular cylindrical hinge pairs at the bottom of the four corners of its load-bearing crossbeam, which are hinged to the active platforms on both sides. The lifting platform as a whole is formed by the active platform and the driven platform alternately overlapped by cylindrical pin shaft pairs. It can rotate slightly relative to the active platform to reduce the internal stress of the lifting platform when lifting at multiple lifting points. During the process of lifting and transferring the ship, the lifting platform has a certain degree of mobility while ensuring the stability of the ship. Like the active platform, the driven platform is also designed with corresponding auxiliary support structures for the trolley running track, bracket, and other auxiliary parts. Modular decks are laid on the upper surfaces of the active platform and the driven platform to make the upper surface of the platform flat and beautiful.

[0041] The lifting platform 2 is divided into multiple lifting platform units as a whole, with modular design. All manufacturing can be completed in the factory, without on-site welding and manufacturing, ensuring the quality of the product. On-site hoisting and debugging are simple, and there is no need to build cofferdams and assembly sites at present, which greatly saves on-site work time and on-site construction costs. This can greatly reduce the manufacturing difficulty, total weight and multi-hanging point lifting synchronization debugging difficulty of the lifting platform 2 as a whole. It is easy to disassemble and replace damaged parts, and easy to inspect and maintain.

[0042] In this example, the shore 1 is made of concrete, and consists of two concrete platforms extending from the shore, on which platform equipment is installed and vehicles and personnel walk. The water area between the two shores 1 is for ships 3 to enter and anchor. The lifting platform 2 is set between the two extended shores 1, and its length and width are slightly smaller than the water area surrounded by the shores. The lifting winch 4 is set on the shores 1 on both sides of the lifting platform 2.

[0043] Working principle:

[0044] Inside the lifting winch 4, the motor drives the drum after being decelerated by the reducer, and the wire rope wound on the drum is connected to the pulley block, and the shaft of the pulley is connected to the connecting end of the active platform, so that the active platform can move up and down. The ship 3 is parked on the active platform, and the lifting winch 4 is started, and the active platform lifts the ship to the shore surface. The walking transfer trolley 5 enters the active platform along the track 7, lifts the driven platform, and exits the active platform, so that the ship 3 and the bracket 6 are transported out of the active platform. The walking transfer trolley 5 moves in the track 7, and driving in and out of the lifting platform 2 will cause a large deformation of the lifting platform 2. When the walking transfer trolley 5 is driving, the shore bridge 8 provides a smooth transition between the shore 1 and the lifting platform 2. Then, the ship 3 can be placed by using the track 7 and the direction change of the walking transfer trolley 5. After placing it, the walking transfer trolley 5 retracts the lifting device, drives to the initial position, and waits for the next transportation. On the contrary, the ship 3 can be put into the water and the reverse operation can be performed.

[0045] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A mobile modular lifting platform for a large ship lift, characterized in that: It includes a shore base, a lifting platform, a ship, a lifting winch, a walking and transferring trolley group, a bracket, a track and a shore-based ferry. The lifting platform is connected to the land through the shore base. The lifting platform includes multiple lifting platform units and an active platform main longitudinal beam and an active platform main cross beam welded together. The various lifting platform units are arranged in parallel and connected, and are located on the active platform main longitudinal beam; the ship is located above the lifting platform, and multiple groups of lifting winches are fixedly connected in the middle of the shore base. The lifting winches are movably connected to the lifting platform. Tracks compatible with the walking and transferring trolley group are provided on the shore base and the lifting platform. The lifting platform is formed by alternately overlapping an active platform and a driven platform welded from a steel structure, and a bracket for supporting the ship is provided above the active platform; a shore-based ferry is provided between the shore base and the lifting platform; the walking and transferring trolley is located between the track and the bracket; protruding straight legs are provided on both sides of the active platform of the lifting platform, and cylindrical hinge pairs for articulating the driven platform are provided on the protruding straight legs.

2. The mobile modular lifting platform of a large ship lift according to claim 1, characterized in that: The lifting platform units are actively distributed, and the lifting platform includes a first active platform and a second active platform. The lifting platform units of the first active platform and the second active platform have different distribution spacings.

3. The mobile modular lifting platform of a large ship lift according to claim 1, characterized in that: The driven platform includes a plurality of driven platform units, and the driven platform units include a middle driven platform and driven platforms on both sides, the middle driven platform and the driven platforms on both sides are connected in an "I" shape, and a ship fixing device is arranged on the driven platform unit.

4. The mobile modular lifting platform for a large ship lift according to claim 2, characterized in that: The driven platform includes a driven platform unit, the spacing between the driven platform units is an adjustable spacing, the driven platform is divided into a first driven platform and a second driven platform, and the positions of the first driven platform unit and the second driven platform unit correspond to the positions of the first active platform unit and the second active platform unit respectively.

5. The mobile modular lifting platform for a large ship lift according to claim 1, characterized in that: The lifting winch is movably connected to the lifting platform through a pulley block and a steel wire rope. A motor for providing power is arranged in the lifting winch, and pin shaft interfaces are arranged on both sides of the active platform.

6. The mobile modular lifting platform for a large ship lift according to claim 1, characterized in that: The walking transfer trolley group comprises a plurality of walking transfer trolleys, which are fixedly connected to each other, and a motor for providing moving power and lifting power is arranged inside the walking transfer trolley.

7. The mobile modular lifting platform for a large ship lift according to claim 1, characterized in that: The walking transfer trolley is provided with a top column, the movement direction of the top column is longitudinal, and the walking transfer trolley is provided with a guide wheel disc which can rotate in the plane direction of the shore base, and the guide wheel disc is provided with a guide wheel.

8. The mobile modular lifting platform for a large ship lift according to claim 1, characterized in that: An active platform main cross beam is arranged between the active platform main longitudinal beams, and bracket fixing support points are marked on the active platform main longitudinal beams.

9. The mobile modular lifting platform for a large ship lift according to claim 1, characterized in that: Diagonal beams are arranged between the main longitudinal beams of the active platform.

10. The mobile modular lifting platform of a large ship lift according to claim 1, characterized in that: The tracks on the shore are crisscrossed in a "well" shape.

Images