A ship guiding device for large platform float-over

Abstract

The application relates to the technical field of ship guiding, and discloses an in-ship guiding device for large platform float-on, which comprises pneumatic slide rails fixedly installed on both sides of the tail of a ship, and further comprises a moving seat, a guiding plate and a support part; the moving seat is sleeved on the pneumatic slide rails and slides along the long-axis direction of the pneumatic slide rails; the guiding plate is installed on the moving seat and is provided with a shock-absorbing part for absorbing impact force; and the pneumatic slide rails are provided with the support part for improving the impact resistance of the guiding plate; liquid flow is controlled through the cooperation of a liquid guiding groove, a water suction pipe and a one-way valve; not only is impact energy consumed through liquid viscous resistance, but also seawater is inhaled by a piston reset to realize seawater circulation, effectively weaken the impact effect and take away the heat generated by repeated friction; meanwhile, the pressurized liquid is sprayed to a contact surface through an extrusion groove to form liquid film lubrication, the friction loss between the guiding plate and the fender is greatly reduced, rigid vibration damage to structural components is effectively avoided, and the in-ship guiding precision is ensured.

Description

Technical Field

[0001] This invention relates to the field of ship guidance technology, specifically to a ship-entry guidance device for large platform floating. Background Technology

[0002] In the development of offshore oil and gas resources and the construction and installation of offshore floating production storage and offloading (FPSO) units, the floating installation method for large platforms is a mature, economical, and efficient mainstream construction technique. The core of this technique lies in using tugboats or dynamic positioning systems to precisely maneuver a semi-submersible barge or specialized floating vessel carrying the topside module into the jacket structure fixed to the seabed. The vessel then submerges, increasing its draft, and the topside module descends accordingly until it rests on the jacket structure.

[0003] During the process of entering and docking the ship, due to the influence of ocean currents, waves, and ship maneuvering deviations, contact and collision between the ship and the jacket are inevitable. Therefore, the ship entry guidance device installed at the stern or side of the ship is of paramount importance.

[0004] Currently, most existing guiding devices are fixed and cannot be moved. The gap between the jacket and the ship is small, only a few centimeters wider than the ship, making it difficult to enter the ship. Moreover, most existing guiding devices only have simple mechanical limiting or single rubber buffer functions, which are difficult to effectively absorb high-frequency vibration and instantaneous impact energy. Especially under the huge inertia of the ship, the single buffer structure may fail due to overcompression, causing the impact energy to be directly transmitted to the hull structure and jacket, resulting in damage to the hull structure and jacket. Summary of the Invention

[0005] This invention provides a ship-entry guidance device for large platform floating. Through a movable stern guide device, it provides more effective and timely limiting constraints and guiding forces for the ship-entry process, thereby helping the ship to quickly return to its correct position. In addition, with the multi-stage synergistic effect of energy-absorbing bars, energy-absorbing springs and hydraulic damping, it significantly improves the shock reduction effect. This solves the problems mentioned in the background art, where existing guide devices are mostly fixed and cannot be moved, resulting in great difficulty in ship entry and difficulty in effectively absorbing high-frequency vibration and instantaneous impact energy, which can easily lead to damage to the hull structure and jacket.

[0006] This invention provides the following technical solution: A ship-entry guidance device for floating large platforms includes pneumatic slide rails fixedly installed on both sides of the stern of the ship, and further includes: a movable seat, which is sleeved on the pneumatic slide rails and slides along the long axis of the pneumatic slide rails; and a guide plate, which is installed on the movable seat and is provided with a shock-absorbing part to absorb impact force. The pneumatic slide rails are provided with a support part to improve the impact resistance of the guide plate.

[0007] As a preferred embodiment of the present invention, the shock-absorbing part includes a shock-absorbing chamber with an opening on one side, a piston plate slidably connected inside the shock-absorbing chamber, a connecting plate fixedly connected to the side of the piston plate facing the opening of the shock-absorbing chamber, a guide plate fixed to the side wall of the connecting plate, and multiple sets of energy-absorbing springs fixed at equal intervals between the other side of the piston plate and the inner wall of the shock-absorbing chamber.

[0008] As a preferred embodiment of the present invention, the impact contact surface of the guide plate is provided with multiple sets of energy-absorbing strips, each set of energy-absorbing strips is arranged in a linear array along the long axis of the guide plate, and an interval gap is formed between adjacent sets of energy-absorbing strips.

[0009] As a preferred embodiment of the present invention, the guide plate has a liquid guiding cavity inside, and the connecting plate has multiple sets of liquid guiding grooves running through it. The two ends of the liquid guiding grooves are respectively connected to the shock absorption chamber and the liquid guiding cavity. The upper part of the impact contact surface of the guide plate has multiple sets of extrusion grooves, which are connected to the inner cavity of the liquid guiding cavity. Each set of liquid guiding grooves is provided with a one-way valve.

[0010] As a preferred embodiment of the present invention, the bottom of the shock-absorbing chamber is fixed and connected to a water suction pipe, and a one-way valve is provided inside the water suction pipe.

[0011] As a preferred embodiment of the present invention, the end of the guide plate is provided with an inclined guide surface, the inclination angle of which is 30-45°. The inclined guide surface is used to provide smooth guidance when the guide plate makes contact collision.

[0012] As a preferred embodiment of the present invention, the energy-absorbing strip is made of rubber, polyurethane or EVA, and the cross-sectional shape of the energy-absorbing strip is rectangular, trapezoidal or semi-circular.

[0013] As a preferred embodiment of the present invention, the support part includes a support column, which is fixedly connected to the top of the movable seat. A connecting rod is fixedly connected to the top of the support column, and the other end of the connecting rod is fixedly connected to the top of the shock-absorbing chamber. A limiting slide is slidably connected to the pneumatic slide rail, and a reinforcing rod is fixedly connected to the limiting slide. The other end of the reinforcing rod is fixedly connected to the side wall of the connecting rod, thereby forming a stable support structure.

[0014] As a preferred embodiment of the present invention, it also includes a guide frame, wherein multiple sets of spring telescopic rods are installed at equal intervals on the top of the guide frame, and each set of spring telescopic rods is fixedly connected to a fender at its telescopic end.

[0015] As a preferred embodiment of the present invention, the contact surface of the fender is provided with an elastic damping element, and the end of the fender is provided with an oblique contact surface adapted to the oblique guide surface. When the oblique guide surface and the oblique contact surface are in contact with each other, a continuous oblique transition structure is formed to provide smooth guide.

[0016] Compared with the prior art, the present invention provides a ship-entry guidance device for large platform floating, which has the following beneficial effects: 1. This ship-entry guidance device for large platform floating platforms provides more effective and timely limiting constraints and guiding forces during the ship-entry process through a movable stern-mounted guide device, thereby helping the ship to quickly return to its correct position. The device controls liquid flow through a liquid guide channel, a water suction pipe, and a one-way valve. It not only dissipates impact energy through liquid viscous resistance but also utilizes the negative pressure during piston reset to draw in seawater, achieving seawater circulation and effectively reducing impact. The seawater also carries away the heat generated by repeated friction. Simultaneously, the pressurized liquid is sprayed onto the contact surface through an extrusion channel, forming a liquid film lubrication, significantly reducing frictional loss between the guide plate and the fender, effectively preventing damage to structural components from rigid vibrations, and ensuring the accuracy of ship-entry guidance.

[0017] 2. This ship-entry guide device for large platform floating has significantly improved the impact reduction effect through the multi-stage synergistic effect of energy-absorbing strips, energy-absorbing springs, and hydraulic damping; and through the spaced gap design of the energy-absorbing strips, it can effectively release lateral expansion stress, thereby effectively absorbing high-frequency vibration and initial impact energy, preventing the rubber from tearing due to excessive shear stress, and improving the service life of the energy-absorbing strips. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0019] Figure 1 This is a schematic diagram of the first guiding state plane of the present invention; Figure 2 This is a schematic diagram of the second guiding state plane of the present invention; Figure 3 This is a schematic diagram of the third guiding state plane of the present invention; Figure 4 This is a first-view perspective stereoscopic diagram of the present invention; Figure 5 This is a second-view perspective stereoscopic diagram of the present invention; Figure 6 This is a schematic diagram of the vertical cross-sectional structure of the shock-absorbing chamber of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the shock-absorbing chamber of the present invention; Figure 8 This is a schematic cross-sectional view of the fluid guiding cavity of the present invention.

[0020] In the diagram: 1. Pneumatic slide rail; 2. Moving seat; 3. Guide plate; 31. Shock absorber chamber; 32. Piston plate; 33. Connecting plate; 331. Liquid guide groove; 34. Energy-absorbing spring; 35. Energy-absorbing strip; 36. Liquid guide cavity; 37. Extrusion groove; 38. Water suction pipe; 4. Support column; 41. Connecting rod; 42. Limiting slide seat; 43. Reinforcing rod; 5. Guide frame; 51. Spring telescopic rod; 52. Fender. Detailed Implementation

[0021] 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.

[0022] Example: Reference Figures 1-8 A ship-entry guidance device for floating large platforms includes pneumatic slide rails 1 fixedly installed on both sides of the stern of the ship, and further includes: a movable seat 2, which is sleeved on the pneumatic slide rails 1 and slides along the long axis of the pneumatic slide rails 1; a guide plate 3, which is installed on the movable seat 2, and the end of the guide plate 3 is provided with an inclined guide surface, the inclination angle of which is 30°-45°, preferably 30°. The inclined guide surface is used to provide smooth guidance when the guide plate 3 makes contact collision, and the guide plate 3 is provided with a shock-absorbing part to absorb the impact force. The pneumatic slide rails 1 are provided with a support part to improve the impact resistance of the guide plate 3. The movable guide plate 3 provides more effective and timely limiting constraints and guiding forces for the ship-entry process, thereby helping the ship to quickly return to its correct position.

[0023] Reference Figures 5-8The shock-absorbing unit includes a shock-absorbing chamber 31 with an opening on one side. A piston plate 32 is slidably connected inside the shock-absorbing chamber 31. A connecting plate 33 is fixedly connected to the side of the piston plate 32 facing the opening of the shock-absorbing chamber 31. A guide plate 3 is fixed to the side wall of the connecting plate 33. Multiple sets of energy-absorbing springs 34 are fixed at equal intervals between the other side of the piston plate 32 and the inner wall of the shock-absorbing chamber 31. Multiple sets of energy-absorbing strips 35 are provided on the impact contact surface of the guide plate 3. The energy-absorbing strips 35 are made of rubber and have a rectangular cross-section. Each set of energy-absorbing strips 35 is arranged in a linear array along the long axis of the guide plate 3, and a gap is formed between adjacent sets of energy-absorbing strips 35. The width of the gap is designed according to the material properties of the energy-absorbing strips 35 and the expected compression amount. In this embodiment, the width of the gap is one-quarter of the width of the energy-absorbing strip 35. Its function is to provide release space for the lateral expansion of the energy-absorbing strips 35 when they are compressed, thereby avoiding internal stress concentration caused by lateral compression.

[0024] With the above-mentioned structure, as the ship continues to advance, the impact force will act on the energy-absorbing strips 35 on the side wall of the guide plate 3. Since the energy-absorbing strips 35 are made of rubber and arranged in a linear array, each energy-absorbing strip 35 is compressed, and there are gaps between adjacent energy-absorbing strips 35, which can provide space for the lateral expansion of the energy-absorbing strips 35, thereby effectively absorbing high-frequency vibration and initial impact energy, preventing the rubber from tearing due to excessive shear stress, and improving the service life of the energy-absorbing strips 35. Furthermore, when the guide plate 3 is impacted, it will push the piston plate 32 to slide towards the side of the energy-absorbing spring 34, thereby using the energy-absorbing effect of the energy-absorbing spring 34 to weaken the impact force.

[0025] Reference Figures 6-8 The guide plate 3 has a liquid guiding cavity 36 inside, and the connecting plate 33 has multiple sets of liquid guiding grooves 331 running through it. The two ends of the liquid guiding grooves 331 are connected to the shock absorber 31 and the liquid guiding cavity 36 respectively. The upper part of the impact contact surface of the guide plate 3 has multiple sets of extrusion grooves 37, which are connected to the inner cavity of the liquid guiding cavity 36. Each set of liquid guiding grooves 331 is equipped with a one-way valve. The bottom of the shock absorber 31 is fixed and connected to a water suction pipe 38. The input end of the water suction pipe 38 is submerged below the seawater surface, and a one-way valve is installed in the water suction pipe 38.

[0026] It should be noted that the one-way valve in the liquid guiding tank 331 can only allow the liquid in the shock-absorbing chamber 31 to enter the liquid guiding cavity 36; the one-way valve in the water suction pipe 38 can only allow seawater to enter the shock-absorbing chamber 31.

[0027] With the above-described structure, when the guide plate 3 is impacted, it will compress the liquid medium in the shock-absorbing chamber 31, thereby utilizing the viscosity and energy absorption effect of the liquid to further reduce the impact force. Simultaneously, the pressurized liquid will open the one-way valve in the liquid guide channel 331, allowing the liquid medium to flow into the liquid guide chamber 36 along the liquid guide channel 331, and finally be discharged along each set of extrusion grooves 37, spraying onto the contact surface between the guide plate 3 and the fender 52, achieving liquid lubrication, reducing frictional loss between the two, improving their durability, and through the resistance generated by driving the liquid flow within the pipeline, it can... Further absorb impact vibrations; in summary, a flexible shock absorption and energy absorption effect is achieved, effectively reducing the damage to structural components caused by rigid vibration transmission and improving the overall durability of the equipment; when the ship stops moving or the impact force is removed, the rebound force of the energy-absorbing spring 34 pushes the piston plate 32 to reset, forming a negative pressure in the shock-absorbing chamber 31 and opening the one-way valve inside the water suction pipe 38, thereby drawing seawater into the shock-absorbing chamber 31 for replenishment, preparing for the next buffering, and so on, using the flow of liquid to effectively remove the heat accumulated in the shock-absorbing chamber 31 due to repeated compression and friction, ensuring the shock absorption and energy absorption effect.

[0028] Reference Figure 3 , Figure 4 The support includes a support column 4, which is fixedly connected to the top of the movable seat 2. A connecting rod 41 is fixedly connected to the top of the support column 4, and the other end of the connecting rod 41 is fixedly connected to the top of the shock-absorbing chamber 31. A limiting slide 42 is slidably connected to the pneumatic slide rail 1, and a reinforcing rod 43 is fixedly connected to the limiting slide 42. The other end of the reinforcing rod 43 is fixedly connected to the side wall of the connecting rod 41, thereby forming a stable support structure and improving the overall ability of the device to resist the impact force generated during guide contact.

[0029] Reference Figures 1-3It also includes a jacket 5, which is fixed to the seabed by columns and extends out of the sea surface at the top. Multiple sets of spring telescopic rods 51 are installed at equal intervals on the top of the jacket 5. Each set of spring telescopic rods 51 is fixedly connected to a fender 52 at its telescopic end. The contact surface of the fender 52 is provided with elastic shock absorbers made of wear-resistant rubber. The end of the fender 52 is provided with an oblique contact surface that matches the oblique guide surface. When the oblique guide surface and the oblique contact surface are in contact with each other, a continuous oblique transition structure is formed to provide smooth guidance for entry. It should be noted that only the end of the fender 52 at the foremost end of the jacket 5 (i.e., the ship entry end) is provided with an oblique contact surface. The ends of subsequent fenders 52 are straight surfaces. When the inclined guiding surface of the guide plate 3 contacts the inclined contact surface of the foremost fender 52, the horizontal impact force is decomposed into horizontal and vertical components by utilizing the inclined surface effect, achieving smooth guidance and avoiding rigid jamming. The subsequent flat fender 52 can provide a larger contact surface for limiting, achieving a better guiding effect. In addition, the wear-resistant rubber of the contact surface between the spring telescopic rod 51 and the fender 52 can further improve the shock absorption and buffering effect. Under the premise of ensuring the smooth sailing of the ship, it can maximize the protection of each structural component and improve the service life of the device.

[0030] Reference Figures 1-8 In this invention, when the stern of the ship enters the area between the two side jackets 5, the movable seat 2 is driven to move to both sides by the pneumatic slide rails 1 on both sides, so that the oblique guiding surface of the guide plate 3 gradually approaches the oblique contact surface of the fender 52. As the ship continues to approach the platform, the oblique guiding surface of the guide plate 3 will eventually contact the oblique contact surface of the fender 52. At this time, the horizontal impact force is decomposed into horizontal and vertical components by using the oblique effect, so as to achieve smooth introduction and avoid rigid jamming.

[0031] As the ship continues to advance, the impact force will act on the energy-absorbing strips 35 on the side wall of the guide plate 3. Since the energy-absorbing strips 35 are made of rubber and are arranged in a linear array, each energy-absorbing strip 35 is compressed, and there are gaps between adjacent energy-absorbing strips 35, which can provide space for the lateral expansion of the energy-absorbing strips 35, thereby effectively absorbing high-frequency vibration and initial impact energy, preventing the rubber from tearing due to excessive shear stress, and improving the service life of the energy-absorbing strips 35.

[0032] Furthermore, when the guide plate 3 is impacted, it pushes the piston plate 32 to slide towards the side of the energy-absorbing spring 34, thereby reducing the impact force by utilizing the energy-absorbing effect of the energy-absorbing spring 34. At the same time, the piston plate 32 squeezes the liquid medium in the shock-absorbing chamber 31, thereby further reducing the impact force by utilizing the viscosity and energy absorption effect of the liquid. Simultaneously, after being pressurized, the liquid opens the one-way valve in the liquid guide groove 331, allowing the liquid medium to enter the liquid guide cavity 36 along the liquid guide groove 331, and finally be discharged along each set of extrusion grooves 37, and sprayed onto the contact surface between the guide plate 3 and the fender 52, achieving liquid lubrication, reducing the frictional loss between the two, improving their durability, and further absorbing the impact vibration by the resistance generated by driving the liquid flow in the pipeline. In summary, a flexible shock absorption and energy absorption effect is achieved, effectively reducing the damage to structural components caused by rigid vibration transmission, and improving the overall durability of the equipment.

[0033] When the ship stops moving or the impact force is removed, the rebound force of the energy-absorbing spring 34 pushes the piston plate 32 to reset, creating a negative pressure in the shock-absorbing chamber 31 and opening the one-way valve inside the water suction pipe 38, thereby drawing seawater into the shock-absorbing chamber 31 for replenishment, preparing for the next buffering, and so on. By utilizing the flow of liquid, the heat accumulated in the shock-absorbing chamber 31 due to repeated compression and friction can be effectively removed, ensuring the shock absorption and energy absorption effect.

[0034] Components not described in detail in this article are existing technologies.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ship-entry guide device for floating large platforms, comprising pneumatic slide rails (1) fixedly installed on both sides of the stern of the vessel, characterized in that, The ship entry guidance device also includes: The movable seat (2) is sleeved on the pneumatic slide rail (1) and slides along the long axis of the pneumatic slide rail (1). A guide plate (3) is mounted on a movable base (2), and the guide plate (3) is provided with a shock-absorbing part to absorb impact force. The pneumatic slide rail (1) is provided with a support part to improve the impact resistance of the guide plate (3).

2. The ship-entry guidance device for large platform floating as described in claim 1, characterized in that, The shock-absorbing part includes a shock-absorbing chamber (31) with an opening on one side. A piston plate (32) is slidably connected inside the shock-absorbing chamber (31). A connecting plate (33) is fixedly connected to the side of the piston plate (32) facing the opening of the shock-absorbing chamber (31). A guide plate (3) is fixed on the side wall of the connecting plate (33). Multiple sets of energy-absorbing springs (34) are fixed at equal intervals between the other side of the piston plate (32) and the inner wall of the shock-absorbing chamber (31).

3. The ship-entry guidance device for large platform floating as described in claim 2, characterized in that, The guide plate (3) has multiple sets of energy-absorbing strips (35) on its impact contact surface. Each set of energy-absorbing strips (35) is arranged in a linear array along the long axis of the guide plate (3), and there is a gap between adjacent sets of energy-absorbing strips (35).

4. The ship-entry guide device for large platform floating as described in claim 2, characterized in that, The guide plate (3) has a liquid guiding cavity (36) inside. The connecting plate (33) has multiple sets of liquid guiding grooves (331) through it. The two ends of the liquid guiding grooves (331) are connected to the shock absorber (31) and the liquid guiding cavity (36) respectively. The upper part of the impact contact surface of the guide plate (3) has multiple sets of extrusion grooves (37). The extrusion grooves (37) are connected to the inner cavity of the liquid guiding cavity (36). Each set of liquid guiding grooves (331) is equipped with a one-way valve.

5. A ship-entry guidance device for large platform floating as described in claim 2, characterized in that, The bottom of the shock-absorbing chamber (31) is fixed and connected to a water suction pipe (38), and a one-way valve is installed inside the water suction pipe (38).

6. The ship-entry guidance device for large platform floating as described in claim 1, characterized in that, The end of the guide plate (3) is provided with an inclined guide surface with an inclination angle of 30-45°. The inclined guide surface is used to provide smooth guidance when the guide plate (3) makes contact collision.

7. A ship-entry guidance device for large platform floating as described in claim 3, characterized in that, The energy-absorbing strip (35) is made of one of rubber, polyurethane or EVA material, and the cross-sectional shape of the energy-absorbing strip (35) is one of rectangle, trapezoid or semi-circle.

8. A ship-entry guide device for large platform floating as described in claim 2, characterized in that, The support includes a support column (4), which is fixedly connected to the top of the movable seat (2). A connecting rod (41) is fixedly connected to the top of the support column (4). The other end of the connecting rod (41) is fixedly connected to the top of the shock absorber (31). A limiting slide (42) is slidably connected to the pneumatic slide rail (1). A reinforcing rod (43) is fixedly connected to the limiting slide (42). The other end of the reinforcing rod (43) is fixedly connected to the side wall of the connecting rod (41), thereby forming a stable support structure.

9. A ship-entry guidance device for large platform floating as described in claim 6, characterized in that, It also includes a jacket frame (5), on which multiple sets of spring telescopic rods (51) are installed at equal intervals on the top of the jacket frame (5), and each set of spring telescopic rods (51) is fixedly connected to a fender (52) at the telescopic end.

10. A ship-entry guidance device for large platform floating as described in claim 9, characterized in that, The contact surface of the fender (52) is provided with an elastic damping element, and the end of the fender (52) is provided with an oblique contact surface adapted to the oblique guide surface. When the oblique guide surface and the oblique contact surface are in contact with each other, a continuous oblique transition structure is formed to provide smooth guide.

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