Lifting road sill device for roll-on-roll-off ship

Abstract

The invention discloses a lifting road sill device for a roll-on-roll-off ship, and relates to the field of roll-on-roll-off equipment. The hanging device is used for hanging the uphill at the initial position and lowering the uphill to rotate to a preset station; the downhill way is hinged to the other side of the ship body structure; the jacking device is used for jacking the lower ramp to rotate to a preset station; and the docking device is used for docking and locking the upper ramp and the lower ramp which are aligned at the preset station. The lifting road sill device for the roll-on-roll-off ship can be unfolded during working so that a vehicle can conveniently go to the upper layer from the lower layer of a ship body structure, can be retracted in a normal state so that the internal space of the ship body cannot be occupied, facilitates internal passing, and is high in applicability, wide in application range, exquisite and attractive in structure, small in occupied space, low in energy consumption and long in service life; safety, reliability and convenience in use are realized.

Description

Technical Field

[0001] The present invention relates to the field of roll-on / roll-off equipment, in particular to a lifting sill device for a roll-on / roll-off ship. Background Art

[0002] In a ro-ro ship, when vehicles or personnel need to move from the lower level to the upper level of the hull structure, this is usually achieved through a ramp structure. This ramp structure usually has the following defects:

[0003] 1. The ramp structure is a fixed structure inside the hull and cannot be folded or unfolded, occupying the internal space of the hull and making it inconvenient for internal passage;

[0004] 2. The slope structure has high energy consumption and short service life.

[0005] This paper aims to address at least one of the above issues. Summary of the Invention

[0006] In view of the above-mentioned shortcomings, the present invention provides a lifting sill device for roll-on / roll-off ships, which can be unfolded during operation to facilitate vehicles to move from the lower layer of the hull structure to the upper layer, and can be retracted under normal conditions so as not to occupy the internal space of the hull and facilitate internal passage. It has strong applicability, a wide range of applications, a sophisticated and beautiful structure, small space occupation, low energy consumption, a long service life, safety and reliability, and is easy to use.

[0007] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0008] A lifting sill device for a roll-on / roll-off ship, comprising:

[0009] an up ramp, which is hinged to one side of the hull structure;

[0010] A suspension device, used for suspending the upper ramp at an initial position and lowering the upper ramp to rotate to a preset position;

[0011] a lower ramp, which is hinged to the other side of the hull structure;

[0012] A lifting device is used to lift the down ramp and rotate it to a preset working position;

[0013] The docking device is used to dock and lock the upramp and downramp aligned at the preset work position.

[0014] According to one aspect of the present invention, it also includes a suspension support arm, which is a connecting rod mechanism or a wire rope; when the upper ramp is lifted and retracted, the suspension support arm automatically folds; when the upper ramp is lowered to the preset work station, the suspension support arm automatically extends and bears the weight of the upper ramp.

[0015] According to one aspect of the present invention, it further comprises an upper ramp supporting device; when the upper ramp is retracted to the initial position, the upper ramp supporting device extends and is connected to the hull structure, thereby supporting the upper ramp.

[0016] According to one aspect of the present invention, it also includes:

[0017] a support rod, one end of which is hinged to the down ramp and the other end of which is slidably connected to the hull structure;

[0018] The support rod locking device is used to lock and fix the other end of the support rod when the down ramp drives one end of the support rod to the preset working position.

[0019] According to one aspect of the present invention, it also includes:

[0020] Movable curbs, which are connected on both sides of the downhill slope;

[0021] Curb lifting device, used to drive the movable curb to rise and fall.

[0022] According to one aspect of the present invention, the suspension device comprises:

[0023] A lifting power mechanism, which is installed on the hull structure and is used to retract and release the cable;

[0024] Cable for connection to the upper ramp.

[0025] According to one aspect of the present invention, the docking device comprises:

[0026] A docking cylinder, which is installed on the downramp and is used to drive the docking pin to extend and retract;

[0027] A docking pin is used to snap into the upper ramp when the upper ramp and the lower ramp are aligned in a preset position.

[0028] According to one aspect of the present invention, it also includes:

[0029] An up-ramp guide wheel, which is mounted on the up-ramp and is slidably connected to the up-ramp guide rail;

[0030] The upper ramp guide is mounted on the hull structure.

[0031] According to one aspect of the present invention, it also includes:

[0032] A down ramp guide wheel is mounted on the down ramp and is slidably connected to the down ramp guide rail;

[0033] Down ramp guide rail, which is installed on the hull structure.

[0034] According to one aspect of the present invention, it also includes detachable guardrails, which are detachably connected to both sides of the downhill ramp and both sides of the uphill ramp.

[0035] According to one aspect of the present invention, the lifting device adopts a jacking device or a lifting device, and the jacking device or the lifting device lifts and lowers one end of the downramp so that the downramp rotates around the hinge to a preset position.

[0036] Advantages of the implementation of the present invention: The present invention provides a lifting sill device for roll-on / roll-off ships, which can be unfolded during operation to facilitate vehicles to move from the lower layer of the hull structure to the upper layer, and can be retracted under normal conditions so as not to occupy the internal space of the hull and facilitate internal passage. It has strong applicability, a wide range of applications, a sophisticated and beautiful structure, small space occupation, low energy consumption, a long service life, safety and reliability, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 It is a schematic diagram of the structural principle of the present invention;

[0039] Figure 2 It is a structural schematic diagram of the present invention under normal conditions;

[0040] Figure 3 It is a schematic diagram of the structure of the present invention when it is working;

[0041] Figure 4 Schematic diagram of the top view of the up ramp of the present invention;

[0042] Figure 5 Schematic diagram of the structure of the down ramp of the present invention from a top view;

[0043] Figure 6 It is a schematic diagram of the first partial structure of the present invention;

[0044] Figure 7 It is a schematic diagram of a second partial structure of the present invention;

[0045] Figure 8 It is a schematic diagram of the docking device mechanism of the present invention;

[0046] Figure 9 This is a schematic diagram of the mechanism of embodiment 5 of the present invention.

[0047] The names corresponding to the serial numbers in the figure are as follows:

[0048] 1. Upramp; 2. Suspension device; 21. Lifting cylinder; 22. Cable; 23. Pulley block; 3. Downramp; 4. Lifting device; 5. Docking device; 51. Docking cylinder; 52. Docking pin; 6. Movable curb; 7. Curb lifting cylinder; 8. Curb support plate; 9. Removable guardrail; 10. Suspension support arm; 11. Upramp support device; 111. Upramp support cylinder; 112. Locking multi-link; 12. Support rod; 13. Support rod locking device; 14. Upramp guide wheel; 15. Upramp guide rail; 16. Downramp guide wheel; 17. Downramp guide rail; 18. Hull structure; 19. Lifting device; 191. Driving cylinder; 192. Speed-increasing wire rope; 193. Pulley block; 194. Guide pulley; 195. Lifting wire rope. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top", "bottom", etc. is based on the orientation or position relationship shown in the 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 on the present invention.

[0050] Example 1

[0051] like Figure 1 - Figure 7As shown, a lifting ramp device for a roll-on / roll-off ship includes an upper ramp 1, a suspension device 2, a lower ramp 3, a lifting device 4, and a docking device 5. The upper ramp 1 and the lower ramp 3 are spaced apart. One end of the upper ramp 1 is hinged to the upper layer of the hull structure 18 (such as the deck), and the two can rotate relative to each other. One end of the lower ramp 3 is hinged to the lower layer of the hull structure 18 (such as the floor), and the two can rotate relative to each other. The suspension device 2 is installed on the upper layer of the hull structure 18 and connected to the movable end of the upper ramp 1. The suspension device 2 is used to suspend the upper ramp 1 in an initial position. That is, under normal conditions, the suspension device 2 suspends the upper ramp 1 to a position where the upper ramp 1 is approximately flush with the upper layer of the hull structure 18. The suspension device 2 is also used to release the upper ramp 1 and rotate it downward relative to the upper layer of the hull structure 18 to a preset position. The preset position is a position where the movable ends of the upper ramp 1 and the lower ramp 3 are aligned. The lifting device 4 is mounted on the lower level of the hull structure 18 and connected to the movable end of the downramp 3. It is used to lift the downramp 3 and rotate it upward relative to the lower level of the hull structure 18 to a predetermined position. The lifting device 4 is a lifting cylinder, with its bottom end hinged to the lower level of the hull structure 18 and its top end hinged to the movable end of the downramp 3. The docking device 5 is mounted on the movable end of the downramp 3 and is used to dock and lock the upper and lower ramps 1 and 3, which are aligned in the predetermined position. The provision of the docking device 5 ensures a stable connection between the upper and lower ramps 1 and 3, enhancing the stability of the connection and preventing misalignment caused by vehicle traffic or hull sway, thereby providing numerous significant advantages. From a vehicle traffic perspective, the smooth and continuous ramp allows vehicles to pass smoothly and smoothly without the need for deceleration or multiple adjustments, significantly improving traffic efficiency and reducing impact and wear on vehicle components such as suspension systems and tires, reducing the risk of damage to vehicles and ensuring the safety of the cargo they carry. From a safety perspective, the absence of misaligned steps eliminates the risk of tripping and falling, and significantly reduces the risk of vehicles losing control and running down the ramp, creating a safer working environment for crew members and operators, and safeguarding life and property. For the lifting sill assembly, the docking device 5 avoids stress concentration, slows the fatigue rate of structural materials, extends the service life of the ship, reduces construction and maintenance costs, and reduces the workload of subsequent maintenance. Furthermore, the efficient and stable ramp connection streamlines the loading and unloading process, shortens vehicle loading and unloading time, improves the loading and unloading efficiency of ro-ro vessels, effectively reduces the time a ship spends in port, improves the ship's operational efficiency, and enhances the overall competitiveness of ro-ro transport.

[0052] In this embodiment, the suspension device 2 includes a lifting power mechanism and a cable 22, which are connected. The lifting power mechanism is installed on the upper layer of the hull structure 18 and is used to retract and extend the cable 22. The cable 22 is connected to the movable end of the upper ramp 1, with a pulley block 23 used as a transition in the middle. The lifting power mechanism uses a lifting cylinder 21, which is connected to the cable 22. During implementation, the pulley block 23 includes a movable pulley block and a fixed pulley block. The fixed pulley block is fixed to the upper layer of the hull structure 18. The lifting cylinder 21 is horizontally arranged, and the extended end of the lifting cylinder 21 is connected to the movable pulley block. The head end of the cable 22 is connected to the movable pulley block, passes around the fixed pulley block in the middle, and the tail end is connected to the movable end of the upper ramp 1. When the lifting cylinder 21 is horizontally extended or retracted, it drives the movable pulley block to translate, that is, drives one end of the cable 22 to translate, causing the other end of the cable 22 to rise and fall, thereby retracting and extending the upper ramp 1. By setting the suspension device 2, when the up ramp is retracted, the up ramp can fit into the upper layer of the hull structure 18, forming a space parallel to the upper structure of the hull structure 18, thereby reducing the risk of personnel passage while increasing space utilization.

[0053] In this embodiment, if Figure 8 As shown, the docking device 5 includes a docking cylinder 51 and a docking pin 52, which are connected. The docking cylinder 51 is installed at the movable end of the downramp 3 and is used to drive the docking pin 52 to extend and retract. The docking pin 52 is used to snap into the upramp 1 when the upramp 1 and downramp 3 are aligned in the preset working position. There are several docking devices 5. When the upramp 1 and downramp 3 are driven to rotate to the preset working position, the docking device 5 is activated, that is, the docking cylinder 51 extends to drive the docking pin 52 to extend, so that the docking pin snaps into the corresponding notch at the movable end of the upramp 1, thereby locking the upramp 1 and downramp 3. When not in operation (i.e., when no traffic or people are passing), the docking cylinder retracts, driving the docking pin 52 to retract into the downramp 3, and then the upramp 1 and downramp 3 are rotated and reset. The docking cylinder is a docking cylinder, and an electric cylinder can also be used.

[0054] In this embodiment, the curb-lifting device further includes a movable curb 6 and a curb lifting mechanism, which are connected. The movable curb 6 is attached to both sides of the downramp 3 perpendicular to the direction of travel. The curb lifting mechanism is used to drive the movable curb 6 up and down. The curb lifting mechanism includes a curb lifting cylinder 7 and a connected curb support plate 8. The curb lifting cylinder 7 is hingedly mounted at the bottom of the downramp 3, and the curb support plate 8 is hingedly connected to the bottom of the movable curb 6. The extension and retraction of the curb lifting cylinder 7 drives the curb support plate 8 to rotate and fold, thereby raising and lowering the movable curb 6. After the ramp 3 is lifted into position, the curb lifting device lifts the movable curb 6, raising it above the ramp 3, thereby protecting the vehicle while driving on the ramp. When the ramp 3 is reset, i.e., rotated and lowered to a level position flush with the lower level of the hull structure 18, the curb lifting device lowers and retracts the movable curb 6, aligning it with the lower level of the hull structure 18, i.e., the entire floor. This increases the usable flat floor surface, which is very important for ship decks. This arrangement not only enhances structural safety during operation, ensuring the smooth passage of vehicles on the ramp 3, but also increases the usable flat floor surface during normal operation, providing strong applicability and ease of use.

[0055] In this embodiment, the lifting curb device also includes a detachable guardrail 9, which is detachably connected to both sides of the downramp 3 and the upramp 1; the detachable guardrail 9 serves to protect vehicles or people when passing on the ramp, thereby enhancing the safety of the structure; the detachable setting facilitates the disassembly and assembly of the structure.

[0056] The beneficial effects of this embodiment are: the present invention provides a lifting sill device for a roll-on / roll-off ship, which can be unfolded during operation to facilitate vehicles to move from the lower layer of the hull structure 18 to the upper layer, and can be retracted under normal conditions so as not to occupy the internal space of the hull and facilitate internal passage. It has strong applicability, a wide range of applications, a sophisticated and beautiful structure, occupies little space, and is easy to use.

[0057] Example 2

[0058] The main difference between this embodiment and the first embodiment is that the present lifting sill device further includes a suspension support arm 10, an up-ramp support device 11, a support rod 12, and a support rod locking device 13, which can solve the problems of high energy consumption and short service life.

[0059] In this embodiment, the suspension support arm 10 is a connecting rod mechanism, with its top end hinged to the upper layer of the hull structure 18, its bottom end hinged to the upper ramp 1, and the connection between the intermediate connecting rods also being hinged. When the upper ramp 1 is hoisted and retracted, the suspension support arm 10 automatically folds, eliminating the need for an additional power unit. When the upper ramp 1 is lowered to a preset workstation, the suspension support arm 10 automatically extends. When the suspension support arm 10 is fully extended, it can support the weight of the upper ramp 1 and the weight of the load on it, freeing the suspension device 2 from the load, thereby reducing energy consumption and extending its service life. When the lifting power mechanism of the suspension device 2 uses a lifting cylinder 21, the frequency of cylinder use can also be reduced, reducing energy loss and extending the cylinder's service life.

[0060] In this embodiment, the up-ramp support device 11 includes an up-ramp support cylinder 111, a locking multi-link 112 or a locking pin installed in the up-ramp 1. When the up-ramp 1 is retracted to its initial position (i.e., reset or normal state), the up-ramp support device 11 extends and connects to the hull structure 18, i.e., the up-ramp support cylinder 111 extends, driving the locking multi-link 112 to rotate and extend in the middle or driving the locking pin to extend, so that the extended portion of the locking multi-link 112 or the locking pin engages with the corresponding notch in the upper position of the hull structure 18, thereby supporting the entire up-ramp 1. At this time, the suspension device 2 does not need to bear the weight of the up-ramp 1 all the time, thereby reducing energy consumption and extending the service life. When the lifting power mechanism of the suspension device 2 adopts the lifting cylinder 21, the lifting cylinder 21 does not need to be in a working state all the time, which can reduce the frequency of cylinder use, reduce energy loss, and extend the service life of the cylinder. The device adopts a locking multi-link 112 or a locking pin structure, and has the advantages of a compact structure, small space occupation, and simple operation.

[0061] In this embodiment, the top end of the support rod 12 is hinged to the bottom end of the down ramp 3, and the bottom end of the support rod 12 is movably arranged, and the bottom end of the support rod 12 can slide on the lower position of the hull structure 18, that is, on the floor; the support rod locking device 13 is installed at the lower position of the hull structure 18, that is, on the floor, and the support rod locking device 13 is used to lock and fix the bottom end of the support rod 12 when the down ramp 3 drives the top end of the support rod 12 to the preset position, thereby locking the support rod 12; in this way, the jacking device 4 only bears the work and force when the down ramp 3 is lifted. After the lifting is completed or during other normal use, the jacking device 4 no longer bears the load and work, thereby reducing energy consumption and extending service life; when the jacking device 4 adopts a jacking cylinder, the frequency of use of the cylinder can be reduced, energy loss can be reduced, and the service life of the cylinder can be extended. The support rod locking device 13 can be a telescopic rod and a locking pin, which are connected; when the lower ramp 3 is lifted to the preset position by the jacking cylinder, that is, the lower ramp 3 drives the top end of the support rod 12 to be lifted into place and the bottom end of the support rod 12 slides into place, the support rod locking device 13 is activated, that is, the telescopic rod drives the locking pin to extend, so that the locking pin is engaged in the corresponding locking groove at the bottom end of the support rod 12, thereby locking and fixing the support rod 12. A corresponding slide groove or slideway can be set on the floor, and the support rod 12 is placed in the slide groove or slideway. This not only facilitates the sliding of the bottom end of the support rod 12 when the support rod 12 moves with the lower ramp 3, but also facilitates the folding of the support rod 12 under normal conditions. The hidden structural design not only protects the structure but also ensures aesthetics.

[0062] By setting up the jacking device 4, when the upper ramp 3 needs to be used, the upper ramp 3 can be jacked up to the preset work position. After use, the upper ramp 3 can be retracted so that the upper ramp 3 forms a space parallel or flush with the bottom surface of the lower layer of the hull, which is convenient for the passage of vehicles on the lower layer and at the same time, can increase the utilization rate of the lower space.

[0063] The beneficial effects of this embodiment are that, compared to conventional devices that suffer from high energy consumption and short service life, the lifting sill device for a roll-on / roll-off ship provided by the present invention also has the advantages of low energy consumption, long service life, a compact and beautiful structure, and safety and reliability. The present invention can be deployed during operation to facilitate the movement of vehicles from the lower level to the upper level of the hull structure 18, and can be retracted under normal conditions, thereby omitting internal space and facilitating internal passage. It has strong applicability, a wide range of applications, a compact and beautiful structure, a small footprint, and is easy to use.

[0064] Example 3

[0065] The main difference between this embodiment and embodiment 1 or embodiment 2 is that the lifting power mechanism of the suspension device 2 does not use a lifting cylinder 21, but adopts a design similar to a winch; the suspension support arm 10 does not use a connecting rod mechanism, but uses a wire rope cable.

[0066] In this embodiment, the lifting power mechanism can be a winding drum and a rotating mechanism that drives the winding drum to rotate, installed on the upper level of the hull structure 18. During implementation, the pulley block 23 is a fixed pulley block. The head end of the cable 22 is wrapped around the winding drum, passes through the fixed pulley block in the middle, and the tail end is connected to the movable end of the ascending ramp 1. When the rotating mechanism drives the winding drum to rotate, the cable 22 is retracted or released, which in turn drives the movable end of the ascending ramp 1 to rotate relative to the hull structure 18, realizing the retraction and extension of the ascending ramp 1. Although this solution can achieve similar effects, it has the disadvantages of being less stable and simple than the solutions of Examples 1 or 2.

[0067] In this embodiment, the suspension support arm 10 is a steel wire rope, one end of which is fixed to the upper position of the hull structure 18 and the other end is fixed to the upper ramp 1. When the upper ramp 1 is lifted and retracted, the suspension support arm 10 can automatically fold without the need for an additional power device; when the upper ramp 1 is lowered to the preset work position, the suspension support arm 10 can automatically extend. When the suspension support arm 10 is fully open, it can bear the weight of the upper ramp 1 and the weight of the load on it, so that the suspension device 2 does not bear the weight of the load, thereby reducing energy consumption and extending the service life; when the lifting power mechanism of the suspension device 2 uses a lifting cylinder 21, it can also reduce the frequency of cylinder use, reduce energy loss, and extend the service life of the cylinder. Although this solution can achieve similar effects, it has the disadvantages of strong structural stability and long service life compared to the solutions in Example 1 or Example 2. The steel wire rope has the disadvantage of stretching after long-term use, and its service life is relatively short.

[0068] The beneficial effects of this embodiment are: the present invention provides a lifting sill device for a roll-on / roll-off ship, which can be unfolded during operation to facilitate vehicles to move from the lower layer of the hull structure 18 to the upper layer, and can be retracted under normal conditions so as not to occupy the internal space of the hull and facilitate internal passage. It has strong applicability, a wide range of applications, a sophisticated and beautiful structure, small space occupation, low energy consumption, a long service life, safety and reliability, and is easy to use.

[0069] Example 4

[0070] The main difference between this embodiment and embodiment one, embodiment two or embodiment three is that this lifting threshold device also includes an upramp guide wheel 14, an upramp guide rail 15, a downramp guide wheel 16, and a downramp guide rail 17, which can facilitate the movement of the upramp 1 and the downramp 3, ensure the docking accuracy of the upramp 1 and the downramp 3, make the structure more stable, and make the structural design more reasonable.

[0071] In this embodiment, the up-ramp guide wheel 14 is mounted on the up-ramp 1 and is slidably connected to the up-ramp guide rail 15. The up-ramp guide rail 15 is fixed to the upper level of the hull structure 18 and is arc-shaped. The length and angle of the arc of the up-ramp guide rail 15 are determined by the distance and angle between the initial position of the up-ramp 1 and the preset working position. The down-ramp guide wheel 16 is mounted on the down-ramp 3 and is slidably connected to the down-ramp guide rail 17. The down-ramp guide rail 17 is fixed to the lower level of the hull structure 18 and is arc-shaped. The length and angle of the arc of the down-ramp guide rail 17 are determined by the distance and angle between the initial position of the down-ramp 3 and the preset working position.

[0072] In this embodiment, when the suspension device 2 lowers the upper ramp 1, the upper ramp 1 rotates along the arc of the upper ramp guide rail 15 via the upper ramp guide wheel 14, ensuring that the upper ramp 1 moves along a predetermined trajectory. When the lifting device 4 lifts the lower ramp 3, the lower ramp 3 rotates along the arc of the lower ramp guide rail 17 via the lower ramp guide wheel 16, ensuring that the lower ramp 3 moves along a predetermined trajectory. This ensures that the upper ramp 1 and the lower ramp 3 are precisely docked at the preset working position, facilitating docking and locking by the docking device 5, ensuring structural stability, and guaranteeing the service life of the device, ensuring safety and reliability.

[0073] The opening action principle of this lifting sill device is as follows:

[0074] When vehicles or personnel need to move from the lower level of the ro-ro ship to the upper level (such as from the floor to the deck), on the one hand, the up-ramp support device 11 is retracted first, that is, the up-ramp support cylinder 111 is retracted, driving the locking multi-link 112 to rotate and retract in the middle or driving the locking pin to retract, thereby unlocking the up-ramp 1, and then the lifting power mechanism of the suspension device 2 releases the cable 22, so that the movable end of the up-ramp 1 rotates and descends. When rotating and descending, the up-ramp 1 rotates along the arc direction of the up-ramp guide rail 15 through the up-ramp guide wheel 14, and at the same time, the suspension support arm 10 is unfolded along with the up-ramp 1. After the up-ramp 1 is lowered and rotated to the preset position, the suspension support arm 10 is fully extended and opened to support the up-ramp 1; on the other hand, at the same time At this time, the lifting device 4 is activated to lift the downramp 3, causing the movable end of the downramp 3 to rotate and lift. During the rotation and lifting, the downramp 3 rotates along the arc direction of the downramp guide rail 17 via the downramp guide wheel 16. At the same time, the top of the support rod 12 follows the downramp 3 and is lifted, and the bottom of the support rod 12 slides accordingly. After the downramp 3 is lifted and rotated to the preset working position, the bottom of the support rod 12 slides to the predetermined position. The support rod locking device 13 is activated to lock and fix the support rod 12, supporting the downramp 3. After the upramp 1 and downramp 3 are in place, the docking device 5 is activated to dock and lock the upramp 1 and downramp 3. Finally, the curb lifting device is activated to lift the movable curb 6, completing the entire opening process. Conversely, the reset and recovery action can be performed.

[0075] The beneficial effects of this embodiment are: the present invention provides a lifting sill device for a roll-on / roll-off ship, which can be unfolded during operation to facilitate vehicles to move from the lower layer of the hull structure 18 to the upper layer, and can be retracted under normal conditions so as not to occupy the internal space of the hull and facilitate internal passage. It has strong applicability, a wide range of applications, a sophisticated and beautiful structure, small space occupation, low energy consumption, a long service life, safety and reliability, and is easy to use.

[0076] Example 5

[0077] The main difference between this embodiment and embodiment 1, embodiment 2 or embodiment 3 is that Figure 9 As shown, the jacking device 4 is replaced with a lifting device 19, which is installed on the upper layer of the hull structure 18. The lifting device 19 includes a drive cylinder 191, a speed-increasing wire rope 192, a pulley block 193, a guide pulley 194, and a lifting wire rope 195. The drive cylinder 191 is installed on the upper layer of the hull structure 18, and its output end is connected to the speed-increasing wire rope 192. The installation of the speed-increasing wire rope can reduce the cylinder stroke. The other end of the speed-increasing wire rope 192 is connected to the pulley block 193, which is a movable pulley block. One end of the lifting wire rope 195 is connected to the movable end of the down ramp 3, and the other end is connected to the guide pulley 194. The guide pulley converts the wire rope's lateral motion into vertical motion. When opening is required, the driving cylinder 191 retracts, driving the speed-increasing wire rope 192 to move, pulling the pulley group 193 to move, and after being guided by the guide pulley, pulling the upper ramp 3 upward. At this time, the driving wheel group follows the driving cylinder 191 to retract until the lower ramp 3 is lifted to the docking position. Otherwise, the reset and recovery action can be carried out.

[0078] Example 6

[0079] This embodiment provides a roll-on / roll-off ship, which includes the lifting sill device as described in any of the first to sixth embodiments.

[0080] The beneficial effects of this embodiment are as follows: the roll-on / roll-off ship can facilitate the passage of vehicles or personnel up and down, and the lifting threshold device of the roll-on / roll-off ship can be unfolded during operation to facilitate the movement of vehicles from the lower layer of the hull structure 18 to the upper layer, and can be retracted under normal conditions so as not to occupy the internal space of the hull and facilitate internal passage. It has strong applicability, a wide range of applications, a sophisticated and beautiful structure, small space occupation, low energy consumption, a long service life, safety and reliability, and is easy to use.

[0081] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variation, combination, or substitution that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A lifting sill device for a roll-on / roll-off ship, characterized in that: include: an up ramp (1) hinged to one side of the hull structure (18); A suspension device (2) is used to suspend the upper ramp (1) at an initial position and to lower the upper ramp (1) and rotate it to a preset position; a down ramp (3) hinged to the other side of the hull structure (18); A lifting device for ascending and descending the ramp (3) and rotating to a preset work position; A docking device (5) is used to dock and lock the upramp (1) and the downramp (3) aligned at a preset position; The suspension support arm (10) is a connecting rod mechanism or a steel wire rope; when the up ramp (1) is lifted and retracted, the suspension support arm (10) is automatically folded; when the up ramp (1) is lowered to a preset work station, the suspension support arm (10) is automatically extended and bears the weight of the up ramp (1).

2. The lifting curb device according to claim 1, characterized in that: It also includes an upper ramp supporting device (11); when the upper ramp (1) is retracted to the initial position, the upper ramp supporting device (11) extends and is connected to the hull structure (18), thereby supporting the upper ramp (1).

3. The lifting curb device according to claim 1, characterized in that: Also includes: A support rod (12) has one end hinged to the down ramp (3) and the other end slidably connected to the hull structure (18); a support rod locking device (13) is used to lock and fix the other end of the support rod (12) when the down ramp (3) drives one end of the support rod (12) to be lifted to a preset working position.

4. The lifting curb device according to claim 1, characterized in that: Also includes: Movable curbs (6) connected to both sides of the downhill ramp (3); The curb lifting device is used for driving the movable curb (6) to rise and fall.

5. The lifting curb device according to any one of claims 1 to 4, characterized in that: The suspension device (2) comprises: A lifting power mechanism, which is installed on the hull structure (18) and is used to retract and release the cable (22); A cable (22) is used for connecting with the up ramp (1).

6. The lifting curb device according to claim 5, characterized in that: The docking device (5) comprises: A docking cylinder, which is mounted on the down ramp (3) and is used to drive the docking pin to extend and retract; The docking pin is used for being locked into the upper ramp (1) when the upper ramp (1) and the lower ramp (3) are aligned at a preset position.

7. The lifting curb device according to claim 5, characterized in that: Also includes: An up-ramp guide wheel (14) is mounted on the up-ramp (1) and is slidably connected to an up-ramp guide rail (15); and an up-ramp guide rail (15) is mounted on a hull structure (18).

8. The lifting curb device according to claim 5, characterized in that: Also includes: A down ramp guide wheel (16) is mounted on the down ramp (3) and is slidably connected to a down ramp guide rail (17); and the down ramp guide rail (17) is mounted on a hull structure (18).

9. The lifting curb device according to claim 5, characterized in that: It also includes detachable guardrails (9) which are detachably connected to both sides of the down ramp (3) and both sides of the up ramp (1).

10. The lifting curb device according to claim 1, characterized in that: The lifting device adopts a jacking device (4) or a lifting device (19), and the jacking device (4) or the lifting device (19) lifts and lowers one end of the down ramp (3), so that the down ramp (3) rotates around the hinge to a preset position.

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