A high-strength, high-sea-state free-fall lifeboat

Abstract

The present invention discloses a high-strength and high-sea-condition free-falling lifeboat, which relates to the technical field of lifeboat equipment, including a hull and a boat frame. The hull shape design adopts a fluid-solid coupling method to control the coupling effect between the structure and the fluid, simulates and analyzes the force distribution of the lifeboat body, combines finite element analysis and fluid mechanics results, and simulates and verifies the optimal shape. A plurality of safety seats, a first strap, a connector, a second strap, and a third strap are arranged inside the hull. The present invention utilizes computational fluid dynamics, finite element analysis, reliability analysis, and dynamic coupling response analysis to simulate and verify the optimal hull shape design, so that the lifeboat can enter the water at the optimal angle at a drop height of 60 meters, and convert the buoyancy into a forward impulse after exiting the water in the optimal posture. The present invention studies and designs a five-point safety seat, which can better fix the members on the lifeboat seat and improve the safety of riding.

Description

Technical Field

[0001] The present invention relates to the technical field of lifeboat equipment, and more particularly to a high-strength, high-sea-state free-falling lifeboat. Background Art

[0002] The concept of free-fall lifeboat was first proposed by a Swede in 1897. After more than a hundred years of optimization and improvement, it has now been widely used in marine lifesaving and evacuation. It completely changed the traditional way of using a sling to land a lifeboat on both sides of the ship. Instead, it allows the lifeboat to freely fall into the water along the slide of the launching device at the stern, away from the heading of the mother ship. It only takes a few seconds from the beginning of the release of the lifeboat to the water surface.

[0003] The existing free-fall lifeboats are considered excellent if they can reach a drop height of 20 meters, but only a few can reach 30 meters. The moment they enter the water at high speed, they will be subjected to complex and huge fluid impact loads, which will not only damage the structure, but also cause great harm to the instruments and facilities inside the structure as well as to the personnel. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a high-strength and high-sea-condition free-fall lifeboat. The problem to be solved by the present invention is: how to improve the strength and impact resistance of the lifeboat, ensure the safety of internal personnel and structural instruments, and enhance the applicability of the lifeboat in high sea conditions.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-strength and high-sea-condition free-fall lifeboat, comprising a hull and a scaffold, the hull is manufactured by a layer laying method and a stacking method, the scaffold comprises a davit arm, a slide, a release hook device, a boat fixing device, a hydraulic system, a hydraulic boat lifting winch, an arm support, a ship lock and a davit rope, one end of the davit arm is movably connected to the arm support, the slide is inclined, the release hook device is movably connected to the boat fixing device, the davit rope is arranged at one end of the davit arm away from the arm support, the hull shape design adopts a fluid-solid coupling method to control the coupling effect between the structure and the fluid, the force distribution of the lifeboat body is simulated and analyzed, and the optimal shape is simulated and verified in combination with the finite element analysis results, a plurality of safety seats are arranged inside the hull, first straps are symmetrically arranged on both sides of the top of the outer wall of the safety seat, one end of the two first straps is provided with the same connector, and second straps are symmetrically arranged on both sides of the middle of the outer wall of the safety seat, the second straps are clamped with the connector, and the outer wall of the safety seat is provided with a third strap below the second strap.

[0006] In a preferred embodiment, a roof is provided on the top of the hull, and a boat sling fixing frame is provided on the top of the roof.

[0007] In a preferred embodiment, the release hook device includes a release handle, a handle safety pin, a release flexible shaft, a release shaft safety pin and a simulated release chain.

[0008] In a preferred embodiment, the handle safety pin is arranged between the release handle and the release flexible shaft, and the release shaft safety pin is arranged between the release flexible shaft and the simulated release chain.

[0009] In a preferred embodiment, the release handle, the handle safety pin, the release flexible shaft and the release shaft safety pin are all arranged on the hull.

[0010] In a preferred embodiment, the boat securing device includes a fixing seat, a boat securing hook and a boat securing chain, the simulated release chain is connected to the fixing seat, the boat securing hook is connected to the boat body, and the fixing seat and the boat securing hook are connected via the boat securing chain.

[0011] In a preferred embodiment, when simulating the optimal shape of the hull, finite element analysis software is used to construct a three-dimensional model, computational fluid dynamics CFD, and the law of conservation of physics is used to simulate the flow of air and heat transfer, and an air flow and heat conduction model is created for optimization, and the optimal shape is simulated and verified. The hull is made of fiberglass composite material.

[0012] In a preferred embodiment, the arm support is arranged at a lower end of the top of the slide, and the boat fixing device is arranged at a higher end of the top of the slide.

[0013] In a preferred embodiment, one end of the hydraulic system is movably connected to the slideway, and the other end of the hydraulic system is movably connected to the boat davit arm.

[0014] In a preferred embodiment, a telescopic mechanism matching the first strap, the second strap and the third strap is provided inside the safety seat.

[0015] Technical effects and advantages of the present invention:

[0016] 1. The present invention uses the fluid-solid coupling method to control the coupling between the structure and the fluid, simulates and analyzes the force distribution of the lifeboat hull, and combines the finite element analysis results to simulate and verify the optimal hull shape design, so that the lifeboat can enter the water at the best angle at a drop height of 60 meters, and convert the buoyancy into forward impulse after exiting the water in the best posture, so as to achieve the effect of moving away from the mother ship at the fastest speed. The hull adopts the layer laying method and the stacking method, combined with the optimal structure simulated by computer, and the strength of the designed and manufactured hull is sufficient to withstand the impact force generated when it is dropped from a height of 60 meters;

[0017] 2. The present invention studies and designs a five-point (2-point knee, 2-point shoulder, 1-point pelvis) safety seat to replace the previous three-point safety seat, which can better fix the members on the lifeboat seat and improve the safety of riding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the state of the present invention during free fall.

[0020] Figure 3 It is a partial enlarged schematic diagram of the present invention.

[0021] Figure 4 It is a front view of the safety seat of the present invention.

[0022] Figure 5 It is a schematic diagram of the transportation and lifting of the boat body of the present invention.

[0023] Figure 6 It is another schematic diagram of transporting and lifting the boat body of the present invention.

[0024] Figure 7 It is a schematic diagram of the recovery of the lifeboat of the present invention.

[0025] Figure 8 The schematic diagram of the structure of the lifeboat with the best appearance of the present invention is shown in FIG.

[0026] Fig. 9 This is a front view of the best-shaped lifeboat of the present invention.

[0027] The accompanying drawings are marked as follows: 1 hull, 2 cradle, 3 boat lifting arm, 4 slide, 5 release hook device, 6 boat fixing device, 7 hydraulic system, 8 hydraulic boat lifting winch, 9 arm support, 10 lock, 11 boat lifting rope, 12 safety seat, 13 first strap, 14 connector, 15 second strap, 16 third strap, 17 roof, 18 boat lifting rope fixing frame, 19 release handle, 20 handle safety pin, 21 release flexible shaft, 22 release shaft safety pin, 23 simulated release chain, 24 fixing seat, 25 boat fixing hook, 26 boat fixing chain. DETAILED DESCRIPTION

[0028] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of the present disclosure will be more comprehensive and complete and the concepts of the example embodiments will be fully conveyed to those skilled in the art. The accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0029] In addition, the described features, structures or characteristics may be combined in one or more example embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the example embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or other methods, components, steps, etc. may be adopted. In other cases, well-known structures, methods, implementations or operations are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0030] like Figure 1-9 A high-strength, high-sea-condition free-fall lifeboat is shown, comprising a hull 1 and a cradle 2, wherein the hull 1 is manufactured by a layering method and a stacking method, and the cradle 2 comprises a boat hoist arm 3, a slideway 4, a release hook device 5, a boat fixing device 6, a hydraulic system 7, a hydraulic boat lifting winch 8, an arm support 9, a ship lock 10 and a boat hoist rope 11, wherein one end of the boat hoist arm 3 is movably connected to the arm support 9, the slideway 4 is inclined, the release hook device 5 is movably connected to the boat fixing device 6, and the boat hoist rope 11 is arranged at one end of the boat hoist arm 3 away from the arm support 9, and the shape design of the hull 1 adopts a fluid-solid coupling method to control the coupling effect between the structure and the fluid, simulates and analyzes the force distribution of the lifeboat body, and combines the finite element analysis results to simulate and verify the optimal shape;

[0031] A roof 17 is provided on the top of the hull 1, and a boat sling fixing frame 18 is provided on the top of the roof 17. The roof 17 shields the top of the hull 1, and the hull 1 can be sealed to enhance the safety performance of the hull 1. The boat sling fixing frame 18 is used to be fixedly connected with the boat sling 12 for lifting and hoisting operations of the hull 1.

[0032] The release hook device 5 includes a release handle 19, a handle safety pin 20, a release flexible shaft 21, a release shaft safety pin 22 and a simulated release chain 23, wherein the handle safety pin 20 is arranged between the release handle 19 and the release flexible shaft 21, and the release shaft safety pin 22 is arranged between the release flexible shaft 21 and the simulated release chain 23; the release handle 19, the handle safety pin 20, the release flexible shaft 21 and the release shaft safety pin 22 are all arranged on the hull 1, and the driver can directly operate the release hook device 5 inside the hull 1, unplug the release shaft safety pin 22 from the outside, unplug the handle safety pin 20 from the inside of the hull 1, and then pull the release handle 19, the release handle 19 drives the release flexible shaft 21 to move, and the release flexible shaft 21 drives the simulated release chain 23 to move, so as to realize the release hook operation;

[0033] The boat fixing device 6 includes a fixing seat 24, a boat fixing hook 25 and a boat fixing chain 26, the simulated release chain 23 is connected to the fixing seat 24, the boat fixing hook 25 is connected to the boat body 1, the fixing seat 24 and the boat fixing hook 25 are connected by the boat fixing chain 26, and the boat fixing hook 25 and the fixing seat 24 are fixedly connected together by the fixing chain 26 to fix the boat body 1;

[0034] The arm support 9 is arranged at the lower end of the top of the slide 4, and the boat fixing device 6 is arranged at the higher end of the top of the slide 4, so as to ensure that the front end of the hull 1 is tilted downward to facilitate the hull 1 to enter the water;

[0035] One end of the hydraulic system 7 is movably connected to the slideway 4 , and the other end of the hydraulic system 7 is movably connected to the boat davit arm 3 , so as to ensure the telescopic adjustment of the hydraulic system 7 and further realize the adjustment of the boat davit arm 3 .

[0036] When simulating the optimal shape of the hull 1, finite element analysis software is used to construct a three-dimensional model, computational fluid dynamics CFD, and the law of conservation of physics is used to simulate the flow of air and heat transfer, create an optimized air flow and heat conduction model, and simulate and verify the optimal shape. The hull 1 is made of fiberglass composite material.

[0037] The specific implementation method is as follows: when releasing the lifeboat, clear the obstacles, confirm that the boat rope 11 is disengaged from the boom hook, and the boat rope eye is fixed to the boat rope fixing bracket 18 of the ceiling 17, unplug the charging plug outside the lifeboat, and after the passengers board the boat, close all the boarding doors and hatches, and at the same time, the passengers take their seats and fasten their safety belts, start the engine, unplug the release hook and the release mechanism safety pin in the boat, and at the same time operate the release hook device 5, the tail hanging chain and the release hook are disengaged, the lifeboat freely falls into the water along the slide 4, and the lifeboat leaves the mother ship at full speed; when the lifeboat is recovered, start the pump station motor, operate the cylinder reversing valve, so that the boat arm 3 is pushed to the full side, operate the boat winch reversing valve to lower the boom hook to the position where the lifeboat can be hung, and remove the boat rope eye from the fixing seat. After that, they are hung on the hooks of the boat davit arm 3 respectively, confirming that the boat fixing device 6 is in the open position, operating the boat lifting winch reversing valve, lifting the lifeboat, and after it is in place, the system pressure increases due to the action of the limit push rod, the overflow valve is unloaded, the lifeboat stops rising, and the oil cylinder reversing valve is operated, the boat davit 3 rotates inward, and the lifeboat enters the slide 4. When the lifeboat is in place, the tail hanging chain is hung in the release hook, the hook is locked, the safety pin is inserted, and the boom hook is lowered until the boat rope becomes loose, the boat rope ring is removed from the hook of the boat davit arm 3, and fixed on the boat rope fixing bracket 18; the boom hook is lifted to its storage position, and the boat davit arm 3 is inverted onto the support rod, the cable of the boat fixing device 6 is tightened, the movable ring is hooked on the keel hook, and the power supply of the hydraulic pump station is turned off; the present invention adopts the fluid-solid coupling method to control The coupling effect between the control structure and the fluid is simulated and analyzed. The force distribution of the lifeboat body is simulated and analyzed. Combined with the finite element analysis results, the finite element analysis software is used to construct a three-dimensional model. Computational fluid dynamics (CFD) is a prior art, so I will not go into details here. The physical conservation law is used to simulate the flow and heat transfer of air. The simulation of air flow and heat transfer is a process that comes with the analysis software. Create an optimization model for air flow and heat conduction, and simulate and verify the best shape. The idea and process of constructing a three-dimensional model using finite element analysis software are similar to the thinking process of the design results. The model is lifelike. After the air flow and heat conduction models are optimized, it can ensure that the lifeboat can maintain relative stability in wind and waves, that is, to promote The rudder of the fluid dynamic lift caused by the moment is large enough to offset the moment caused by fatigue current and wind force, ensuring the safety of the boat in extreme and normal use conditions, so that the lifeboat can enter the water at the best angle at a drop height of 60 meters, and convert the buoyancy into forward impulse after exiting the water in the best posture, so as to achieve the effect of moving away from the mother ship at the fastest speed. The hull 1 adopts the layer laying method and the stacking method, combined with the best structure simulated by computer, and the hull strength designed and manufactured is sufficient to withstand the impact force generated when it is dropped from a height of 60 meters to the water surface. The fiberglass composite material structure has good resistance and resistance to crack expansion; in extreme cases, it avoids the safety hazards caused by cracks, and guarantees the safety of people on the lifeboat to a greater extent;This embodiment specifically solves the problem that the existing free-fall lifeboat in the background technology is not suitable for high sea conditions and will be subjected to complex and huge fluid impact loads when entering the water at high speed. This impact load will not only damage the structure, but also cause great harm to the equipment and facilities inside the structure and personnel. ;

[0038] As attached Figure 3-4 A high-strength, high-sea-condition free-fall lifeboat is shown, further comprising a plurality of safety seats 12 arranged inside the hull 1, first straps 13 are symmetrically arranged on both sides of the top of the outer wall of the safety seat 12, one end of the two first straps 13 is provided with a same connector 14, second straps 15 are symmetrically arranged on both sides of the middle of the outer wall of the safety seat 12, the second straps 15 are clamped with the connector 14, and a third strap 16 is arranged on the outer wall of the safety seat 12 below the second strap 15;

[0039] The safety seat 12 is provided with a telescopic mechanism inside that matches the first strap 13, the second strap 15 and the third strap 16 respectively, so as to facilitate the telescopic adjustment of the first strap 13, the second strap 15 and the third strap 16, thereby improving the applicability of the safety seat 12 and allowing it to be used by people of different body shapes.

[0040] The specific implementation method is as follows: when in use, by setting a connector 14 and two first straps 13, a second strap 15 and a third strap 16, the legs are respectively passed through the two third straps 16, the two first straps 13 are placed on the outside of the shoulders, and the two second straps 15 are clamped with the connector 14. The first strap 13 can fix the shoulders, the second strap 15 can fix the waist and pelvis, and the third strap 16 can fix the legs and knees, so that the five-point fixation of the safety seat 12 can be achieved. Compared with a three-point safety seat, it is safer and more reliable, and is simple and convenient to use.

[0041] Working principle of the present invention:

[0042] Refer to the instruction manual Figure 1-9 The present invention utilizes computational fluid dynamics, finite element analysis, reliability analysis, and dynamic coupling response analysis to simulate and verify the optimal hull shape design, so that the lifeboat can enter the water at the optimal angle at a drop height of 60 meters, and convert the buoyancy into forward impulse after exiting the water in the best posture, so as to achieve the effect of moving away from the mother ship at the fastest speed. The hull 1 adopts the layer laying method and the stacking method, combined with the optimal structure simulated by the computer, and the hull strength designed and manufactured is sufficient to withstand the impact force generated when it is dropped from a height of 60 meters to the water surface. The fiberglass composite material structure has good resistance and resistance to crack expansion. In extreme cases, the safety hazards caused by cracks are avoided, and the safety of people on the lifeboat is guaranteed to a greater extent.

[0043] For further information, please refer to the attached manual. Figure 3-4 The present invention studies and designs a five-point (2-point knee, 2-point shoulder, 1-point pelvis) safety seat to replace the previous three-point safety seat, which can better fix the members on the lifeboat seat and improve the safety of riding.

[0044] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0045] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0046] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-strength, high-sea-state free-fall lifeboat, comprising a hull (1) and a cradle (2), characterized in that: The boat body (1) is manufactured by a layer laying method and a stacking method. The boat frame (2) comprises a boat lifting arm (3), a slideway (4), a release hook device (5), a boat fixing device (6), a hydraulic system (7), a hydraulic boat lifting winch (8), an arm support (9), a ship lock (10) and a boat lifting rope (11). One end of the boat lifting arm (3) is movably connected to the arm support (9). The slideway (4) is inclined. The release hook device (5) is movably connected to the boat fixing device (6). The boat lifting rope (11) is arranged at one end of the boat lifting arm (3) away from the arm support (9). A plurality of safety seats (12) are arranged inside the boat body (1). First straps (13) are symmetrically arranged on both sides of the top of the outer wall of the safety seat (12). One end of the two first straps (13) is provided with a same connector (14). Second straps (15) are symmetrically arranged on both sides of the middle of the outer wall of the full seat (12), and the second straps (15) are snap-connected with the connecting head (14). A third strap (16) is arranged on the outer wall of the safety seat (12) below the second straps (15). The outer wall of the hull (1) is designed by using a fluid-solid coupling method to control the coupling effect between the structure and the fluid, simulate and analyze the force distribution of the lifeboat body, and combine the finite element analysis results to simulate and verify the optimal shape. When simulating the optimal shape of the hull (1), a three-dimensional model is constructed using finite analysis software, and CFD is calculated based on the three-dimensional model. The flow and heat transfer of air are simulated using the law of conservation of physics, and a model optimization for air flow and heat conduction is created. The optimal shape is simulated and verified based on the optimized model. The hull (1) is made of fiberglass composite material.

2. A high-strength, high-sea-condition free-fall lifeboat according to claim 1, characterized in that: The top of the hull (1) is provided with a roof (17), and the top of the roof (17) is provided with a boat sling fixing frame (18).

3. A high-strength, high-sea-condition free-fall lifeboat according to claim 1, characterized in that: The release hook device (5) comprises a release handle (19), a handle safety pin (20), a release flexible shaft (21), a release shaft safety pin (22) and a simulated release chain (23).

4. A high-strength, high-sea-state free-fall lifeboat according to claim 3, characterized in that: The handle safety pin (20) is arranged between the release handle (19) and the release flexible shaft (21), and the release shaft safety pin (22) is arranged between the release flexible shaft (21) and the simulated release chain (23).

5. A high-strength, high-sea-condition free-fall lifeboat according to claim 3, characterized in that: The release handle (19), the handle safety pin (20), the release flexible shaft (21) and the release shaft safety pin (22) are all arranged on the hull (1).

6. A high-strength, high-sea-state free-fall lifeboat according to claim 3, characterized in that: The boat fixing device (6) comprises a fixing seat (24), a boat fixing hook (25) and a boat fixing chain (26); the simulated release chain (23) is connected to the fixing seat (24); the boat fixing hook (25) is connected to the boat body (1); and the fixing seat (24) and the boat fixing hook (25) are connected via the boat fixing chain (26).

7. A high-strength, high-sea-state free-fall lifeboat according to claim 1, characterized in that: The arm support (9) is arranged at the lower end of the top of the slideway (4), and the boat fixing device (6) is arranged at the higher end of the top of the slideway (4).

8. The high-strength and high-sea-state free-fall lifeboat according to claim 1, characterized in that: One end of the hydraulic system (7) is movably connected to the slideway (4), and the other end of the hydraulic system (7) is movably connected to the boat davit arm (3).

9. The high-strength and high-sea-state free-fall lifeboat according to claim 1, characterized in that: The safety seat (12) is provided with a telescopic mechanism inside, which is matched with the first strap (13), the second strap (15) and the third strap (16) respectively.

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