A lifting threshold device for a roll-on / roll-off ship

Abstract

The application discloses a lifting road threshold device for a roll-on / roll-off ship and relates to the field of roll-on / roll-off equipment.The lifting road threshold device comprises an upper ramp which is hinged to one side of a ship body structure; a suspension device which is used for suspending the upper ramp in an initial position and lowering the upper ramp to rotate to a preset working position; a lower ramp which is hinged to the other side of the ship body structure; a jacking device which is used for jacking the lower ramp to rotate to the preset working position; and a docking device which is used for docking and locking the upper ramp and the lower ramp which are aligned in the preset working position. The lifting road threshold device for the roll-on / roll-off ship can be unfolded to facilitate vehicles to move from the lower layer of the ship body structure to the upper layer during work, and can be retracted in the normal state so as to not occupy the internal space of the ship body structure and facilitate internal passage, has high applicability, wide application range, exquisite and beautiful structure, small occupied space, low energy consumption, long service life, safety and reliability, and convenience in use.

Description

Technical Field

[0001] This invention relates to the field of roll-on / roll-off equipment, and more particularly to a lifting sill device for roll-on / roll-off ships. Background Technology

[0002] In roll-on / roll-off (Ro-Ro) ships, when vehicles or personnel need to move from the lower to the upper levels of the hull structure, it is generally achieved through a ramp structure. This ramp structure typically has the following drawbacks:

[0003] 1. The ramp structure is a fixed structure inside the ship's hull, which cannot be folded or unfolded, thus encroaching on the internal space of the ship and making it inconvenient for internal passage.

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

[0005] This article aims to address at least one of the above-mentioned problems. Summary of the Invention

[0006] In view of the above-mentioned shortcomings, the present invention provides a lifting threshold device for roll-on / roll-off ships, which can be deployed during operation to facilitate vehicles to move from the lower to the upper level of the ship's structure, and can be retracted in normal operation to avoid occupying the internal space of the ship and facilitate internal passage. It is highly applicable, has a wide range of applications, is compact and beautiful in structure, occupies little space, has low energy consumption, long service life, is safe and reliable, 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 roll-on / roll-off ships, comprising:

[0009] The ramp is hinged to one side of the ship's hull structure.

[0010] The suspension device is used to suspend the ramp at the initial position and to lower the ramp and rotate it to the preset work position.

[0011] The ramp is hinged to the other side of the ship's hull structure.

[0012] The lifting device is used to lift the ramp and rotate it to the preset work position;

[0013] The docking device is used to dock and lock the uphill and downhill ramps that are aligned at a preset work position.

[0014] According to one aspect of the invention, it further includes a suspension support arm, which is a linkage mechanism or a wire rope cable; when the ramp is lifted and retracted, the suspension support arm automatically folds; when the ramp is lowered to a preset work position, the suspension support arm automatically extends and bears the weight of the ramp.

[0015] According to one aspect of the invention, it also includes an uphill ramp support device; when the uphill ramp is retracted to its initial position, the uphill ramp support device extends and connects to the hull structure, thereby supporting the uphill ramp.

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

[0017] The support rod has one end hinged to the ramp and the other end 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 one end of the support rod is lifted to the preset position on the downhill slope.

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

[0020] Movable curbs connect both sides of the downhill ramp;

[0021] A curb lifting device is used to drive the movement of curbs.

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

[0023] The lifting power mechanism, which is installed on the hull structure, is used to raise and lower cables;

[0024] Cables are used to connect to the uphill ramp.

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

[0026] The docking cylinder, which is installed on the downhill ramp, is used to drive the extension and retraction of the docking pin;

[0027] The connecting pin is used to engage with the uphill ramp when the uphill and downhill ramps are aligned at a preset working position.

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

[0029] The ramp guide wheel is installed on the ramp and slidably connected to the ramp guide rail;

[0030] The ramp guide rail is installed on the hull structure.

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

[0032] Downhill guide wheel, which is installed on the downhill ramp and slidably connected to the downhill guide rail;

[0033] The downhill ramp guide rail is installed on the ship's hull structure.

[0034] According to one aspect of the 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 invention, the lifting device employs a jacking device or a hoisting device, which lifts or hoists one end of the ramp, causing the ramp to rotate around the hinge to a preset position.

[0036] Advantages of this invention: This invention provides a lifting ramp device for roll-on / roll-off ships, which can be deployed during operation to facilitate vehicles to move from the lower to the upper level of the ship's structure, and can be retracted in normal operation to avoid occupying internal space of the ship and facilitate internal passage. It is highly applicable, has a wide range of applications, is ingenious and beautiful in structure, occupies little space, has low energy consumption, long service life, is safe and reliable, and is easy to use. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

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

[0040] Figure 3 This is a schematic diagram of the structure of the present invention during operation;

[0041] Figure 4 This is a top view of the ramp structure described in this invention;

[0042] Figure 5 This is a top view of the downhill ramp described in this invention.

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

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

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

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

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

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

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In the description of the present invention, it should be noted that the terms "top," "bottom," "one side," "the other side," "front," "back," "middle part," "inner," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of 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, wherein the upper ramp 1 and the lower ramp 3 are arranged vertically at intervals. One end of the upper ramp 1 is hinged to the upper layer (e.g., deck) of the hull structure 18, and the two can rotate relative to each other; one end of the lower ramp 3 is hinged to the lower layer (e.g., floor) of the hull structure 18, 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, in the normal state, the suspension device 2 suspends the upper ramp 1 to a position approximately flush with the upper layer of the hull structure 18. The suspension device 2 is also used to release the upper ramp 1, causing the upper ramp 1 to rotate downward relative to the upper layer of the hull structure 18 to a preset position, which is the position where the movable ends of the upper ramp 1 and the lower ramp 3 are aligned. The lifting device 4 is installed on the lower layer of the hull structure 18 and connected to the movable end of the ramp 3. The lifting device 4 is used to lift the ramp 3, causing it to rotate upward relative to the lower layer of the hull structure 18 to a preset position. The lifting device 4 is a lifting cylinder, with its bottom end hinged to the lower layer of the hull structure 18 and its top end hinged to the movable end of the ramp 3. The docking device 5 is installed on the movable end of the ramp 3. The docking device 5 is used to dock and lock the ramp 1 and ramp 3, which are aligned at the preset position. The docking device 5 ensures a stable connection between the ramp 1 and ramp 3, enhances the stability of the connection, and avoids misalignment steps at the connection due to vehicle passage or hull swaying, thus bringing many significant advantages. From the perspective of vehicle passage, the flat and continuous ramp allows vehicles to pass smoothly without slowing down or making multiple adjustments, greatly improving passage efficiency and reducing impact and wear on vehicle suspension systems, tires, and other components, reducing the risk of vehicle damage and ensuring the safety of the cargo. From a safety perspective, the elimination of misaligned steps eliminates the risk of pedestrians tripping and significantly reduces the risk of vehicles losing control and plunging down the ramp, creating a safer working environment for crew and workers and ensuring the safety of life and property. For the lifting ramp device, the docking device 5 avoids stress concentration, slows down the fatigue rate of structural materials, extends the service life of the vessel, reduces construction and maintenance costs, and decreases the workload of later maintenance. Furthermore, the efficient and stable ramp connection makes the loading and unloading process smoother, shortens vehicle loading and unloading time, improves the loading and unloading efficiency of roll-on / roll-off ships, effectively reduces the time ships spend in port, enhances the operational efficiency of ships, and strengthens the overall competitiveness of roll-on / roll-off transportation.

[0052] In this embodiment, the suspension device 2 includes a lifting power mechanism and a cable 22 connected together. The lifting power mechanism is installed on the upper layer of the hull structure 18 and is used to raise and lower the cable 22. The cable 22 is connected to the movable end of the ramp 1, with a pulley block 23 used for transition in the middle. The lifting power mechanism uses a lifting cylinder 21, which is connected to the cable 22. In practice, the pulley block 23 consists of a movable pulley block and a fixed pulley block. The fixed pulley block is fixed on the upper layer of the hull structure 18. The lifting cylinder 21 is horizontally set, with its extended end connected to the movable pulley block. The cable 22 has its head connected to the movable pulley block, passes through the fixed pulley block in the middle, and its tail connected to the movable end of the ramp 1. When the lifting cylinder 21 extends or retracts horizontally, it drives the movable pulley block to move horizontally, which in turn drives one end of the cable 22 to move horizontally, causing the other end of the cable 22 to rise and fall, thereby raising and lowering the ramp 1. By setting up the suspension device 2, when the ramp is retracted, it can fit against the upper layer of the hull structure 18, forming a parallel space with the upper layer of the hull structure 18, thereby reducing the risk of personnel passage and increasing the utilization rate of space.

[0053] In this embodiment, as 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 lower ramp 3 and is used to drive the docking pin 52 to extend and retract. The docking pin 52 is used to engage with the upper ramp 1 when the upper ramp 1 and the lower ramp 3 are aligned at a preset working position. Several docking devices 5 are used. When the upper ramp 1 and the lower ramp 3 are driven to rotate to the preset working position for alignment, the docking device 5 is activated, that is, the docking cylinder 51 extends and drives the docking pin 52 to extend, so that the docking pin engages with the corresponding slot at the movable end of the upper ramp 1, thereby locking and fixing the upper ramp 1 and the lower ramp 3. When not in operation (i.e., no vehicles or people pass through), the docking cylinder retracts, drives the docking pin 52 to retract into the lower ramp 3, and then rotates the upper ramp 1 and the lower ramp 3 back to their original positions. The docking cylinder can be a hydraulic cylinder or an electric cylinder, etc.

[0054] In this embodiment, the lifting curb device further includes a movable curb 6 and a curb lifting device, which are connected together. The movable curb 6 is connected to both sides of the downhill ramp 3 perpendicular to its traffic direction, and the curb lifting device is used to drive the movable curb 6 to rise and fall. The curb lifting device includes a curb lifting cylinder 7 and a curb support plate 8, which are connected together. The curb lifting cylinder 7 is hinged to the bottom of the downhill ramp 3, and the curb support plate 8 is hinged to the bottom of the movable curb 6. By extending and retracting the curb lifting cylinder 7, the curb support plate 8 is rotated and folded, thereby causing the movable curb 6 to rise and fall. After the downhill ramp 3 is raised into position, the movable curb 6 is lifted by the curb lifting device, making it higher than the plane of the downhill ramp 3, thus protecting vehicles when driving on the ramp. When the downhill ramp 3 is reset and rotated down to a horizontal position flush with the lower layer of the hull structure 18, the movable curb 6 is lowered and retracted by the curb lifting device, making it flush with the lower layer of the hull structure 18, i.e., the entire floor, thereby increasing the flat usable area of ​​the floor, which is very important for the ship's deck. In other words, this setting can enhance structural safety during operation, ensuring vehicle movement on the downhill ramp 3, and can also increase the flat usable area of ​​the floor under normal conditions, making it highly applicable and convenient to use.

[0055] In this embodiment, the lifting curb device also includes detachable guardrails 9, which are detachably connected to both sides of the downhill ramp 3 and both sides of the uphill ramp 1. The detachable guardrails 9 serve to protect vehicles or people when they pass on the ramp, thereby enhancing structural safety. The detachable design facilitates the disassembly and assembly of the structure.

[0056] The beneficial effects of this embodiment are as follows: The present invention provides a lifting threshold device for roll-on / roll-off ships, which can be deployed during operation to facilitate vehicles to move from the lower level to the upper level of the ship's structure 18, and can be retracted in normal operation so as not to occupy the internal space of the ship and to facilitate internal passage. It has strong applicability, wide application range, exquisite and beautiful structure, small space occupation, and convenient use.

[0057] Example 2

[0058] The main difference between this embodiment and Embodiment 1 is that this lifting curb device also includes a suspension support arm 10, an uphill 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 linkage mechanism, with its top end hinged to the upper layer of the hull structure 18, its bottom end hinged to the ramp 1, and the connection of the intermediate connecting rod also hinged. When the ramp 1 is lifted and retracted, the suspension support arm 10 can automatically fold without the need for an additional power device; when the ramp 1 is lowered to the preset work position, the suspension support arm 10 can automatically extend. In the fully extended state, the suspension support arm 10 can bear the weight of the ramp 1 and the weight of the load above it, so that the suspension device 2 does not bear the load weight, thereby reducing energy consumption and extending service life; when the lifting power mechanism of the suspension device 2 adopts the lifting cylinder 21, the frequency of cylinder use can also be reduced, energy loss can be reduced, and the service life of the cylinder can be extended.

[0060] In this embodiment, the ramp support device 11 includes a ramp support cylinder 111 and a locking multi-link 112 or a locking pin installed inside the ramp 1. When the ramp 1 is retracted to its initial position (i.e., reset or normal state), the ramp support device 11 extends and connects with the hull structure 18. That is, the 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 part of the locking multi-link 112 or the locking pin engages with the corresponding slot in the upper position of the hull structure 18, thereby supporting the entire ramp 1. At this time, the suspension device 2 does not need to bear the weight of the ramp 1 continuously, thereby reducing energy consumption and extending 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 continuously, which can reduce the frequency of cylinder use, reduce energy loss, and extend the service life of the cylinder. This device adopts a locking multi-link 112 or locking pin structure, and also has the advantages of 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 of the ramp 3, and the bottom end of the support rod 12 is movably disposed, allowing it to slide on the floor at the lower level of the hull structure 18. The support rod locking device 13 is installed on the floor at the lower level of the hull structure 18. The support rod locking device 13 is used to lock and fix the bottom end of the support rod 12 when the ramp 3 lifts the top end of the support rod 12 to a preset position, thereby locking the support rod 12. In this way, the lifting device 4 only bears the work and force when lifting the ramp 3. After the lifting is completed or during other normal use, the lifting device 4 no longer bears the load and work, thereby reducing energy consumption and extending service life. When the lifting device 4 uses a lifting cylinder, the frequency of cylinder use 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 connected together. After the lower ramp 3 is lifted to the preset position by the lifting cylinder, that is, after the lower ramp 3 drives the top of the support rod 12 to be lifted into place and the bottom of the support rod 12 to slide 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 of the support rod 12, thereby locking and fixing the support rod 12. A corresponding groove or track can be set on the floor to place the support rod 12 in the groove or track. This facilitates the sliding of the bottom of the support rod 12 when it moves with the lower ramp 3, and also facilitates the retraction of the support rod 12 under normal conditions. The concealed structural design protects the structure and ensures aesthetics.

[0062] With the lifting device 4 in place, the ramp 3 can be lifted to a preset position when it is needed. After use, the ramp 3 can be retracted, so that the ramp 3 forms a space parallel or flush with the bottom surface of the lower layer of the ship, which facilitates the passage of vehicles on the lower layer and increases the utilization rate of the lower layer space.

[0063] The beneficial effects of this embodiment are as follows: compared with the problems of high energy consumption and short service life of general devices, the lifting threshold device for roll-on / roll-off ships provided by this invention also has the advantages of low energy consumption, long service life, exquisite and beautiful structure, and safety and reliability. This invention can be deployed during operation to facilitate vehicles to move from the lower level to the upper level of the ship's structure 18, and can be retracted in normal operation to avoid occupying internal space of the ship and facilitate internal passage. It has strong applicability, wide application range, exquisite and beautiful structure, small space occupation, 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 linkage mechanism, but adopts a wire rope cable.

[0066] In this embodiment, the lifting power mechanism can be a take-up drum and a rotating mechanism that drives the take-up drum to rotate, installed on the upper layer of the hull structure 18. In implementation, the pulley block 23 is a fixed pulley block, the first end of the cable 22 is wound around the take-up drum, the middle part passes through the fixed pulley block, and the tail end is connected to the movable end of the ramp 1. When the rotating mechanism drives the take-up drum to rotate, the cable 22 is retrieved or released, thereby causing the movable end of the ramp 1 to rotate relative to the hull structure 18, realizing the retrieval and release of the ramp 1. Although this solution can achieve a similar effect, it has the disadvantages of not being as structurally stable or simple as the solutions in Embodiment 1 or Embodiment 2.

[0067] In this embodiment, the suspension support arm 10 is a steel wire rope cable, with one end fixed to the upper part of the hull structure 18 and the other end fixed to the ramp 1. When the ramp 1 is lifted and retracted, the suspension support arm 10 can automatically fold without the need for an additional power device; when the ramp 1 is lowered to the preset position, the suspension support arm 10 can automatically extend. In the fully extended state, the suspension support arm 10 can bear the weight of the ramp 1 itself and the weight of the load above it, so that the suspension device 2 does not bear the load weight, thereby reducing energy consumption and extending service life. When the lifting power mechanism of the suspension device 2 adopts the lifting cylinder 21, the frequency of cylinder use can also be reduced, energy loss can be reduced, and the service life of the cylinder can be extended. Although this solution can achieve similar effects, it has the disadvantages of not being as structurally stable or having a longer service life as the solutions in Embodiment 1 or Embodiment 2. The steel wire rope cable has the disadvantage of stretching after prolonged use, resulting in a shorter service life.

[0068] The beneficial effects of this embodiment are as follows: The present invention provides a lifting threshold device for roll-on / roll-off ships, which can be deployed during operation to facilitate vehicles to move from the lower level to the upper level of the ship's structure 18, and can be retracted in normal operation so as not to occupy the internal space of the ship and facilitate internal passage. It has strong applicability, wide application range, exquisite and beautiful structure, small space occupation, low energy consumption, long service life, safety and reliability, and convenient use.

[0069] Example 4

[0070] The main difference between this embodiment and Embodiment 1, Embodiment 2, or Embodiment 3 is that this lifting curb device also includes an upper ramp guide wheel 14, an upper ramp guide rail 15, a lower ramp guide wheel 16, and a lower ramp guide rail 17, which facilitates the movement of the upper ramp 1 and the lower ramp 3, ensures the docking accuracy of the upper ramp 1 and the lower ramp 3, and makes the structure more stable and the structural design more reasonable.

[0071] In this embodiment, the uphill guide wheel 14 is installed on the uphill ramp 1 and slidably connected to the uphill guide rail 15. The uphill guide rail 15 is fixed to the upper position of the hull structure 18 and is arc-shaped; the arc length and angle of the uphill guide rail 15 are determined based on the distance and angle between the initial position of the uphill ramp 1 and the preset work position. The downhill guide wheel 16 is installed on the downhill ramp 3 and slidably connected to the downhill guide rail 17. The downhill guide rail 17 is fixed to the lower position of the hull structure 18 and is arc-shaped; the arc length and angle of the downhill guide rail 17 are determined based on the distance and angle between the initial position of the downhill ramp 3 and the preset work position.

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

[0073] The opening mechanism of this lifting threshold device is as follows:

[0074] When vehicles or personnel need to move from the lower to the upper level of a roll-on / roll-off ship (e.g., from the floor to the deck), firstly, the ramp support device 11 retracts, i.e., the ramp support cylinder 111 retracts, driving the locking multi-link 112 to rotate and retract, or driving the locking pin to retract, unlocking the ramp 1. Then, the lifting power mechanism of the suspension device 2 releases the cable 22, causing the movable end of the ramp 1 to rotate and descend. During the rotation and descent, the ramp 1 rotates along the arc of the ramp guide rail 15 via the ramp guide wheel 14. At the same time, the suspension support arm 10 extends along with the ramp 1. After the ramp 1 is lowered and rotated to the preset position, the suspension support arm 10 fully extends and opens, supporting the ramp 1. On the other hand, the same The lifting device 4 activates, lifting the lower ramp 3, causing its movable end to rotate and rise. During this rotation, the lower ramp 3 rotates along the arc of the lower ramp guide rail 17 via the lower ramp guide wheel 16. Simultaneously, the top of the support rod 12 rises with the lower ramp 3, and the bottom of the support rod 12 slides accordingly. After the lower ramp 3 is lifted and rotated to a preset position, the bottom of the support rod 12 slides to a predetermined position, and the support rod locking device 13 activates, locking and fixing the support rod 12 to support the lower ramp 3. After both the upper ramp 1 and the lower ramp 3 are in position, the docking device 5 activates, docking and locking the upper ramp 1 and lower ramp 3. Finally, the curb lifting device activates, lifting the movable curb 6, thus completing the entire opening process. Conversely, the resetting and retraction action can be performed.

[0075] The beneficial effects of this embodiment are as follows: The present invention provides a lifting threshold device for roll-on / roll-off ships, which can be deployed during operation to facilitate vehicles to move from the lower level to the upper level of the ship's structure 18, and can be retracted in normal operation so as not to occupy the internal space of the ship and facilitate internal passage. It has strong applicability, wide application range, exquisite and beautiful structure, small space occupation, low energy consumption, long service life, safety and reliability, and convenient use.

[0076] Example 5

[0077] The main difference between this embodiment and Embodiment 1, Embodiment 2, or Embodiment 3 is that, as Figure 9 As shown, the lifting device 4 is replaced by a hoisting device 19, which is installed on the upper layer of the hull mechanism 18. The hoisting 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 mechanism 18, and its output end is connected to the speed-increasing wire rope 192. The speed-increasing wire rope reduces the stroke of the cylinder. 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 from lateral movement to vertical movement. When it needs to be opened, the drive cylinder 191 retracts, causing the speed-increasing wire rope 192 to move, which in turn pulls the pulley block 193. After being guided by the guide pulley, the upper ramp 3 is lifted upwards. At this time, the drive wheel block retracts along with the drive cylinder 191 until the lower ramp 3 is lifted to the docking position. Conversely, the reset and retraction action can be performed.

[0078] Example 6

[0079] This embodiment provides a roll-on / roll-off (Ro-Ro) vessel that includes a lifting sill device as described in any of the embodiments one through six.

[0080] The beneficial effects of this embodiment are as follows: the roll-on / roll-off ship facilitates the passage of vehicles or personnel. The lifting threshold device of the roll-on / roll-off ship can be deployed during operation to facilitate vehicles to go from the lower level to the upper level of the ship structure 18, and can be retracted in normal operation so as not to occupy the internal space of the ship and facilitate internal passage. It has strong applicability, wide application range, exquisite and beautiful structure, small space occupation, low energy consumption, long service life, safety and reliability, and convenient 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 variations, combinations, or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A lifting sill device for roll-on / roll-off ships, characterized in that, include: The ramp (1) is hinged to one side of the hull structure (18); The suspension device (2) is used to suspend the ramp (1) at the initial position and to lower the ramp (1) to rotate to the preset work position; Down ramp (3), which is hinged to the other side of the hull structure (18); The lifting device is used to raise the ramp (3) and rotate it to the preset work position; The docking device (5) is used to dock and lock the upper ramp (1) and lower ramp (3) which are aligned at the preset work position; The suspension support arm (10) is a linkage mechanism or a wire rope cable; when the ramp (1) is lifted and retracted, the suspension support arm (10) automatically folds; when the ramp (1) is lowered to the preset work position, the suspension support arm (10) automatically extends and bears the weight of the ramp (1). It also includes an uphill ramp support device (11); when the uphill ramp (1) is retracted to the initial position, the uphill ramp support device (11) extends and connects to the hull structure (18) to support the uphill ramp (1); It also includes movable curbs (6), which are connected to both sides of the downhill ramp (3); and a curb lifting device for driving the movable curbs (6) to rise and fall. After the downhill ramp (3) is lifted into place, the movable curb (6) is lifted by the curb lifting device, so that the movable curb (6) is higher than the plane of the downhill ramp (3), thereby playing a protective role when the car is driving on the ramp; when the downhill ramp (3) is reset and rotated down to a horizontal position that is level with the lower layer of the hull structure (18), the movable curb (6) is lowered and retracted by the curb lifting device, so that the movable curb (6) is level with the lower layer of the hull structure (18), that is, the entire floor, thereby increasing the flat usable area of ​​the floor.

2. The lifting threshold device according to claim 1, characterized in that, Also includes: The support rod (12) is hinged at one end to the ramp (3) and slidably connected to the hull structure (18) at the other end. The support rod locking device (13) is used to lock and fix the other end of the support rod (12) when the support rod (12) is lifted to the preset position by the downhill ramp (3).

3. The lifting threshold device according to claim 1 or 2, characterized in that, The suspension device (2) includes: The lifting power mechanism is installed on the hull structure (18) and is used to raise and lower the cable (22); Cable (22) is used to connect to the uphill ramp (1).

4. The lifting threshold device according to claim 3, characterized in that, The docking device (5) includes: The docking cylinder is installed on the down ramp (3) and is used to drive the docking pin to extend and retract. The connecting pin is used to engage with the upper ramp (1) when the upper ramp (1) and the lower ramp (3) are aligned in a preset position.

5. The lifting threshold device according to claim 3, characterized in that, Also includes: The ramp guide wheel (14) is installed on the ramp (1) and slidably connected to the ramp guide rail (15); The ramp guide rail (15) is installed on the hull structure (18).

6. The lifting threshold device according to claim 3, characterized in that, Also includes: Downhill guide wheel (16) is installed on downhill (3) and slidably connected to downhill guide rail (17); The down ramp guide rail (17) is installed on the hull structure (18).

7. The lifting threshold device according to claim 3, characterized in that, It also includes detachable guardrails (9), which are detachably connected to both sides of the downhill ramp (3) and both sides of the uphill ramp (1).

8. The lifting threshold device according to claim 1, characterized in that, The lifting device adopts a jacking device (4) or a hoisting device (19). The jacking device (4) or the hoisting device (19) lifts one end of the ramp (3) so that the ramp (3) rotates around the hinge to the preset position.

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