Yacht with rescue and landscape green plant functions

By setting up ejection mechanisms and fixing mechanisms on luxury yachts, the combination of efficient rescue and landscape green plants is achieved, solving the problems of low rescue efficiency and insufficient fixed safety, and improving the tourist comfort.

CN120397173AInactive Publication Date: 2025-08-01CHANGZHOU MAIN LAND YACHT
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Patent Information

Application Number
CN202510871451.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-26
Publication Date
2025-08-01
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The rescue efficiency of existing luxury yachts is low, the fixed safety of rescue equipment is insufficient, and the ecological and landscape functions are lacking.

Method used

The ejection mechanism is used to drive the throw-in inflatable lifebuoy, and high-pressure gas is used to increase the rescue distance and range; the fixed mechanism is used to ensure that the lifebuoy does not fall off, and a green plant box is installed to improve sightseeing comfort.

Benefits of technology

It significantly improves rescue efficiency and coverage, ensures the safety of lifebuoys, and enhances the ecological and tourist comfort of the yacht.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention belongs to the technical field of ship equipment, and particularly relates to a yacht with rescue and landscape green plant functions, which comprises a yacht body, a protective coaming is fixed at the upper end of the yacht body, a ceiling is mounted above the protective coaming, seat plates are fixedly connected to the front and rear inner walls of the protective coaming, and ejection mechanisms are arranged on the front and rear walls of the protective coaming. The ejection mechanism is used for ejecting the throwing type inflatable life buoy, annular life buoys are arranged on the front outer wall and the rear outer wall of the protective coaming and fixed to the protective coaming through the fixing mechanism, and a plurality of green plant boxes are fixedly connected to the upper end of the protective coaming and used for cultivating green plants. A plurality of storage boxes are fixedly connected to the position, below the seat plate, of the boat body. The sightseeing yacht has the advantages that the rescue capacity of the sightseeing yacht and the safety of rescue equipment are effectively improved, and meanwhile the sightseeing comfort and the environmental protection property are improved.
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Description

Technical Field

[0001] The present invention relates to the technical field of ship equipment, and in particular to a yacht with both rescue and landscape greening functions. Background Art

[0002] The structure of a yacht mainly consists of a hull, a deck system, a power device and functional areas. It integrates functions such as navigation, sports, entertainment, and leisure, meeting the needs of individuals and families to enjoy life. Yachts are mostly used as business items in parks and tourist attractions for people to consume, and a small number are also used as working means for port supervision, public security, and border defense.

[0003] Certain rescue equipment, such as lifebuoys, needs to be equipped on existing yachts. However, there are the following limitations in the rescue function design of current luxury yachts: Low rescue efficiency: Traditional lifebuoys rely on manual throwing. Limited by arm strength and accuracy, it is difficult to cover long-distance drowning victims, especially in bad sea conditions, and the rescue success rate is greatly reduced.

[0004] Insufficient fixed safety of rescue equipment: Conventional lifebuoy fixing methods (such as hooks or ropes) are easily disassembled by mistake or fall off under the impact of wind and waves, posing a safety hazard.

[0005] Lack of ecological and landscape functions: The utilization rate of the yacht deck space is low, lacking green plant ecological design, reducing the sightseeing comfort and environmental protection attributes.

[0006] To solve the above problems, we propose a yacht with both rescue and landscape greening functions. Summary of the Invention

[0007] The purpose of the present invention is to solve the problems in the background art, and to propose a yacht with both rescue and landscape greening functions.

[0008] To achieve the above purpose, the present invention adopts the following technical scheme: A yacht with both rescue and landscape greening functions, including a hull, a protective fence is fixedly installed at the upper end of the hull, a ceiling is installed above the protective fence, seat plates are fixedly connected to the front and rear inner walls of the protective fence respectively, ejection mechanisms are provided on the front and rear walls of the protective fence, and the ejection mechanisms are used to launch throwing-type inflatable lifebuoys. Ring-shaped lifebuoys are provided on the front and rear outer walls of the protective fence respectively, and the ring-shaped lifebuoys are fixed to the protective fence through fixing mechanisms. A plurality of green plant boxes are fixedly connected to the upper end of the protective fence for cultivating green plants, and a plurality of storage boxes are fixedly connected to the hull at a position below the seat plate.

[0009] In the above-mentioned yacht with both rescue and landscape greening functions, the ejection mechanism includes a launch tube that penetrates the protective enclosure and is inclined. One end of the launch tube inside the protective enclosure is located below the seat board and is fixedly connected to the hull through a mounting seat. A piston block is arranged inside the launch tube. An air tank is fixedly installed on the hull. The air outlet end of the air tank is communicated with a first electromagnetic valve. The lower end of the launch tube is communicated with a second electromagnetic valve. A first connecting pipe is communicated between the first electromagnetic valve and the second electromagnetic valve. Two chutes are opened on the inner wall of the launch tube. One end of the piston block close to the mouth of the launch tube is fixedly connected with two limiting rods. The ends of the limiting rods away from the piston block are slidably connected in the corresponding chutes. An air release pipe is arranged in one of the limiting rods. One end of the air release pipe penetrates the piston block and the other end extends into the corresponding chute. An air release hole is opened in the chute on the same side as the air release pipe. The air release hole is located outside the protective enclosure.

[0010] In the above-mentioned yacht with both rescue and landscape greening functions, a vertically arranged delivery tube is communicated with the launch tube. A delivery opening communicated with the upper end of the delivery tube is opened at the upper end of the protective enclosure. A device groove is opened on the protective enclosure at the corresponding position of the delivery opening. A rising-stem gate valve is fixedly connected in the device groove. A second connecting pipe is communicated between the air inlet end of the rising-stem gate valve and the end of the launch tube. The air outlet end of the rising-stem gate valve is communicated with the delivery tube. The valve stem of the rising-stem gate valve extends to the mouth of the device groove and is fixedly connected with a pressing block. A first spring is fixedly connected between the lower end of the pressing block and the rising-stem gate valve.

[0011] In the above-mentioned yacht with both rescue and landscape greening functions, a groove is arranged on the upper end of the protective enclosure on one side of the device groove. A launch button is installed in the groove. The launch button is electrically connected to the second electromagnetic valve. A moving groove is opened on the upper end of the protective enclosure between the delivery opening and the device groove. The moving groove extends to the position of the groove. A moving block is slidably connected in the moving groove. The upper end of the moving block is fixedly connected with a moving plate. The upper end of the pressing block is provided with an inclined surface.

[0012] In the above-mentioned yacht with both rescue and landscape greening functions, an electromagnet is fixedly installed on the inner bottom wall of the launch tube. The piston block is provided with ferromagnetic material.

[0013] In the above-mentioned yacht with both rescue and landscape green plant functions, the fixing mechanism includes a placement concave block that fits and contacts the lower end of the annular life buoy. There are two limiting members arranged at intervals left and right above the annular life buoy. The limiting member includes a fixing plate fixedly connected to the protective enclosure board. The lower end of the fixing plate is fixedly connected with two blocking rods distributed before and after the annular life buoy. The lower end of the placement concave block is fixedly connected with two lifting rods. Below the lifting rods is a locking box, which is fixedly connected to the protective enclosure board. The lower ends of the two lifting rods penetrate the upper end surface of the locking box and are slidably connected thereto. Two second springs are fixedly connected between the placement concave block and the upper end surface of the locking box.

[0014] In the above-mentioned yacht with both rescue and landscape green plant functions, one end of the two lifting rods located inside the locking box is a smooth spherical surface. Inside the locking box and below the two lifting rods is a limiting plate. An electric telescopic rod is fixedly installed on the protective enclosure board. The telescopic end of the electric telescopic rod extends into the locking box and is fixedly connected to the rear end of the limiting plate.

[0015] Compared with the existing technology, the advantages of the present invention are as follows: By setting the ejection mechanism, the piston block in the launching tube is driven by high-pressure gas to eject the throwable inflatable life buoy to the water entry point that is out of reach of humans, greatly improving the rescue distance and range.

[0016] By setting the air release pipe and air release holes, automatic exhaust is carried out at the end of the piston block stroke to avoid the risk of barrel explosion. With the setting of the moving plate, when the throwable inflatable life buoy is put in, the groove is closed, making the launch button unable to be pressed, ensuring the safety of the throwable inflatable life buoy throwing work.

[0017] By setting the fixing mechanism, the double limit formed by the placement concave block and the blocking rod effectively fits and contacts the annular life buoy, preventing it from falling off under the great influence of the hull shaking and sea waves. And with the locking function formed by the electric telescopic rod and the limiting plate, only authorized personnel can unlock it through the cab, preventing theft and accidental disassembly.

[0018] By setting the green plant box to plant sightseeing green plants, the sightseeing comfort is improved, and at the same time, the local microclimate is improved, meeting the trend of green ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional view of a yacht with both rescue and landscape green plant functions proposed by the present invention; Figure 2 It is a three-dimensional view of another perspective of a yacht with both rescue and landscape green plant functions proposed by the present invention; Figure 3 It is a partial three-dimensional view of the protective enclosure board in a yacht with both rescue and landscape green plant functions proposed by the present invention; Figure 4 For Figure 3 the enlarged structural schematic diagram at position A in Figure 5 This is a partial perspective view of another angle of the protective guardrail in a yacht that combines rescue and landscape greening functions proposed by the present invention; Figure 6 This is a perspective view of the ejection mechanism in a yacht that combines rescue and landscape greening functions proposed by the present invention; Figure 7 This is a perspective view of another angle of the ejection mechanism in a yacht that combines rescue and landscape greening functions proposed by the present invention; Figure 8 This is a partial cross-sectional view of the ejection mechanism in a yacht that combines rescue and landscape greening functions proposed by the present invention; Figure 9 This is a perspective view of the lifebuoy fixing mechanism in a yacht that combines rescue and landscape greening functions proposed by the present invention; Figure 10 This is a partial structural perspective view of the lifebuoy fixing mechanism in a yacht that combines rescue and landscape greening functions proposed by the present invention.

[0020] In the figure: 1 hull, 2 protective guardrail, 3 ceiling, 4 seat board, 5 launch tube, 6 mounting seat, 7 piston block, 8 gas cylinder, 9 first solenoid valve, 10 first connecting pipe, 11 second solenoid valve, 12 chute, 13 limiting rod, 14 air release pipe, 15 air release hole, 16 delivery tube, 17 delivery port, 18 device slot, 19 open rod gate valve, 20 second connecting pipe, 21 pressing block, 22 first spring, 23 electromagnet, 24 launch button, 25 moving slot, 26 moving plate, 27 placing concave block, 28 fixing plate, 29 blocking rod, 30 locking box, 31 lifting rod, 32 second spring, 33 limiting plate, 34 electric telescopic rod, 35 green plant box, 36 storage box. Specific embodiments

[0021] The following embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0022] Refer to Figures 1-10 , a yacht that combines rescue and landscape greening functions, including a hull 1, a protective guardrail 2 is fixedly installed at the upper end of the hull 1, a ceiling 3 is installed above the protective guardrail 2, seat boards 4 are fixedly connected to the front and rear inner walls of the protective guardrail 2, ejection mechanisms are provided on the front and rear walls of the protective guardrail 2, and the ejection mechanisms are used to launch throwable inflatable lifebuoys. The throwable inflatable lifebuoy is a prior art. When not in use, it is the size of a plastic bottle, and the usage method is to be manually thrown to the rescue position and automatically inflate and expand when encountering water to form a lifebuoy.

[0023] The ejection mechanism includes a launch tube 5 that penetrates through the protective enclosure 2 and is inclined at an angle of 30 degrees. One end of the launch tube 5 inside the protective enclosure 2 is located below the seat plate 4 and is fixedly connected to the hull 1 through a mounting seat 6. A piston block 7 is provided inside the launch tube 5. A gas cylinder 8 is fixedly installed on the hull 1, and high-pressure air is filled inside the gas cylinder 8. The air outlet end of the gas cylinder 8 is connected to a first solenoid valve 9, and the lower end of the launch tube 5 is connected to a second solenoid valve 11. A first connecting pipe 10 is connected between the first solenoid valve 9 and the second solenoid valve 11. The control switch of the first solenoid valve 9 is controlled by the cab, playing a safety role. When both the first solenoid valve 9 and the second solenoid valve 11 are in the open state, the high-pressure air in the gas cylinder 8 enters the launch tube 5 through the first connecting pipe 10, thereby pushing the piston block 7 to move.

[0024] Two sliding grooves 12 are opened on the inner wall of the launch tube 5. One end of the piston block 7 close to the mouth of the launch tube 5 is fixedly connected with two limiting rods 13. The ends of the limiting rods 13 far from the piston block 7 are slidably connected in the corresponding sliding grooves 12. The limiting rods 13 and the sliding grooves 12 play a role in restricting the stroke of the piston block 7. An air release pipe 14 is provided in one of the limiting rods 13. One end of the air release pipe 14 penetrates through the piston block 7, and the other end extends into the corresponding sliding groove 12. An air release hole 15 is opened in the sliding groove 12 on the same side as the air release pipe 14. The air release hole 15 is located outside the protective enclosure 2. When the piston block 7 is pushed to the maximum stroke position, the air release pipe 14 is communicated with the air release hole 15, and then the excess high-pressure air can be discharged through the air release pipe 14 and the air release hole 15, avoiding the explosion of the launch tube caused by excessive pressure.

[0025] An electromagnet 23 is fixedly installed on the inner bottom wall of the launch tube 5. The piston block 7 is provided with ferromagnetic material. When the electromagnet 23 is energized, it can attract the piston block 7 to move to the initial position under the action of magnetic force.

[0026] A vertically arranged delivery tube 16 is connected to the launch tube 5. A delivery port 17 communicating with the upper end of the delivery tube 16 is opened at the upper end of the protective enclosure 2. Just throw the throwable inflatable life jacket into the delivery tube 16 through the delivery port 17 on the protective enclosure 2, and the throwable inflatable life jacket can easily fall into the launch tube 5. There is no need to put the throwable inflatable life jacket into the launch tube 5 from the mouth of the launch tube, avoiding the risk of dropping.

[0027] A device slot 18 is provided at the corresponding position of the throwing port 17 on the protective enclosure 2. A rising-stem gate valve 19 is fixedly connected in the device slot 18. The rising-stem gate valve 19 is a prior art, and the lifting of the valve stem controls the opening and closing of the valve. A second connecting pipe 20 is communicated between the air inlet end of the rising-stem gate valve 19 and the end of the launching cylinder 5. The air outlet end of the rising-stem gate valve 19 is communicated with the throwing cylinder 16. The valve stem of the rising-stem gate valve 19 extends to the notch of the device slot 18 and is fixedly connected with a pressing block 21. A first spring 22 is fixedly connected between the lower end of the pressing block 21 and the rising-stem gate valve 19. The first spring 22 serves to maintain the position of the valve stem of the rising-stem gate valve 19, keeping the rising-stem gate valve 19 in an open state.

[0028] A groove is provided on the upper end of the protective enclosure 2 and on one side of the device slot 18. A launch button 24 is installed in the groove. The launch button 24 is electrically connected to the second solenoid valve 11. When the launch button 24 is pressed, the second solenoid valve 11 is opened. Then, after the cab controls the first solenoid valve 9 to remain open, pressing the launch button 24 once can perform an ejection operation of a throwable inflatable life ring. A moving slot 25 is provided on the upper end of the protective enclosure 2 between the throwing port 17 and the device slot 18. The moving slot 25 extends to the position of the groove. A moving block is slidably connected in the moving slot 25. The upper end of the moving block is fixedly connected with a moving plate 26. The upper end of the pressing block 21 is provided with an inclined surface, which facilitates the moving plate 26 to press the pressing block 21 into the device slot 18 when moving to the moving slot 25, thereby closing the rising-stem gate valve 19.

[0029] When the moving plate 26 moves to the state of blocking the groove, the device slot 18 and the throwing port 17 remain exposed. At this time, the throwable inflatable life ring can be placed. In this state, the rising-stem gate valve 19 remains open, and the piston block 7 can be easily sucked to the initial position under the action of the electromagnet 23, waiting for the next ejection operation. After the throwable inflatable life ring is placed at the throwing port, only need to move the moving plate 26 to the throwing port 17 and the device slot 18, making the groove exposed. At this time, the launch button 24 can be pressed for the ejection operation. In this state, the rising-stem gate valve 19 remains closed, and the high-pressure air cannot be discharged through the second connecting pipe 20, maintaining the normal air pressure ejection operation.

[0030] Specifically, after the cab opens the first solenoid valve 9, only need to put the throwable inflatable life ring into the launching cylinder 5 through the throwing port 17, and then move the moving plate 26 to the state of closing the throwing port 17 and the device slot 18, then the launch button 24 can be pressed to eject the throwable inflatable life ring located in the launching cylinder 5, thus easily ejecting the throwable inflatable life ring to a position that cannot be reached by manual throwing, significantly improving the rescue efficiency and coverage.

[0031] Annular lifebuoys are provided on the front and rear outer walls of the protective enclosure 2. The annular lifebuoys are fixed to the protective enclosure 2 by a fixing mechanism. The fixing mechanism includes a placement recess 27 that is in contact with the lower end of the annular lifebuoy. Two limiters are provided above the annular lifebuoy at intervals. The limiters include a fixing plate 28 fixedly connected to the protective enclosure 2. The lower end of the fixing plate 28 is fixedly connected to two baffles 29 distributed front and back about the annular lifebuoy. The lower end of the placement recess 27 is fixedly connected to two lifting rods 31. A locking box 30 is provided below the lifting rod 31. The locking box 30 is connected to the protective enclosure 2. The enclosure 2 is fixedly connected, and the lower ends of the two lifting rods 31 pass through the upper end surface of the locking box 30 and are slidably connected thereto. Two second springs 32 are fixedly connected between the placement recessed block 27 and the upper end surface of the locking box 30. Under the support of the second springs 32, the placement recessed block 27 cooperates with the four blocking rods 29 to effectively fix the annular lifebuoy on the protective enclosure 2. When the annular lifebuoy is needed, the user only needs to press down the annular lifebuoy so that the placement recessed block 27 presses down the spring 32 until the upper end of the annular lifebuoy moves out of the range of the four blocking rods 29, and the annular lifebuoy can be easily taken out.

[0032] The two lifting rods 31 have a smooth spherical surface at one end located within the locking box 30. A stop plate 33 is provided within the locking box 30 and below the two lifting rods 31. An electric telescopic rod 34 is fixedly mounted on the protective panel 2. The telescopic end of the electric telescopic rod 34 extends into the locking box 30 and is fixedly connected to the rear end of the stop plate 33. The stop plate 33 acts as a limiter for the lifting rods 31. When the stop plate 33 is in contact with the lower end surfaces of the two lifting rods 31, there is no room for the lifting rods 31 to move downward. The placement recess 27 cannot be moved downward, and the lifebuoy cannot be removed by pressing downward. This locks the lifebuoy and prevents others from maliciously removing it. When it is needed, the electric telescopic rod 34 can be retracted from the driver's cab, moving the stop plate 33 out of the range of the two lifting rods 31. The lifting rods 31 and the placement recess 27 can then be pressed downward, allowing the lifebuoy to be easily removed. Compared with the conventional fixing methods of positioning buckles and placement racks, it is safer and faster to use.

[0033] A plurality of plant boxes 35 are fixedly connected to the upper end of the protective coaming 2 for growing landscape plants, improving the comfort of the yacht when used for sightseeing and working. A plurality of storage boxes 36 are fixedly connected to the hull 1 and below the seat plate 4 for storing sufficient throwable inflatable lifebuoys and rescue equipment.

[0034] 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 scope of protection of the present invention.

Claims

1. A yacht with both rescue and landscape green plant functions, including a hull (1), characterized in that, A protective railing (2) is fixedly installed at the upper end of the hull (1). A ceiling (3) is installed above the protective railing (2). Seat plates (4) are fixedly connected to the front and rear inner walls of the protective railing (2). Launching mechanisms are provided on the front and rear walls of the protective railing (2) for launching throwable inflatable life rings. Ring-shaped life rings are provided on the front and rear outer walls of the protective railing (2), and the ring-shaped life rings are fixed to the protective railing (2) through fixing mechanisms. A plurality of green plant boxes (35) are fixedly connected to the upper end of the protective railing (2) for cultivating green plants. A plurality of storage boxes (36) are fixedly connected to the hull (1) at a position below the seat plate (4).

2. The yacht with both rescue and landscape greening functions according to claim 1, characterized in that, The launching mechanism includes a launching tube (5) that penetrates the protective railing (2) and is inclined. One end of the launching tube (5) inside the protective railing (2) is below the seat plate (4) and is fixedly connected to the hull (1) through a mounting seat (6). A piston block (7) is provided inside the launching tube (5). An air tank (8) is fixedly installed on the hull (1). The air outlet end of the air tank (8) is communicated with a first electromagnetic valve (9). The lower end of the launching tube (5) is communicated with a second electromagnetic valve (11). A first connecting pipe (10) is communicated between the first electromagnetic valve (9) and the second electromagnetic valve (11). Two sliding grooves (12) are formed on the inner wall of the launching tube (5). Two limiting rods (13) are fixedly connected to one end of the piston block (7) close to the tube opening of the launching tube (5). The end of the limiting rod (13) away from the piston block (7) is slidably connected to the corresponding sliding groove (12). An air release pipe (14) is provided inside one of the limiting rods (13). One end of the air release pipe (14) penetrates the piston block (7) and the other end extends into the corresponding sliding groove (12). An air release hole (15) is formed in the sliding groove (12) on the same side as the air release pipe (14), and the air release hole (15) is located outside the protective railing (2).

3. The yacht with both rescue and landscape greening functions according to claim 2, characterized in that, A vertically arranged delivery tube (16) is communicated with the launching tube (5). A delivery opening (17) communicated with the upper end of the delivery tube (16) is formed in the upper end of the protective railing (2). A device groove (18) is formed in the protective railing (2) at a position corresponding to the delivery opening (17). A rising-stem gate valve (19) is fixedly connected to the device groove (18). A second connecting pipe (20) is communicated between the air inlet end of the rising-stem gate valve (19) and the end of the launching tube (5). The air outlet end of the rising-stem gate valve (19) is communicated with the delivery tube (16). The valve stem of the rising-stem gate valve (19) extends to the opening of the device groove (18) and is fixedly connected to a pressing block (21). A first spring (22) is fixedly connected between the lower end of the pressing block (21) and the rising-stem gate valve (19).

4. A yacht with both rescue and landscape greening functions according to claim 3, characterized in that, At the upper end of the protective fence (2) and on one side of the device slot (18), there is a groove, in which a launch button (24) is installed. The launch button (24) is electrically connected to the second solenoid valve (11). At the upper end of the protective fence (2) and between the feeding port (17) and the device slot (18), a moving slot (25) is formed, which extends to the position of the groove. A moving block is slidably connected in the moving slot (25), and a moving plate (26) is fixedly connected to the upper end of the moving block. The upper end of the pressing block (21) is provided with an inclined surface.

5. A yacht with both rescue and landscape greening functions according to claim 2, characterized in that, An electromagnet (23) is fixedly installed on the inner bottom wall of the launch tube (5), and a ferromagnetic material is provided on the piston block (7).

6. A yacht with both rescue and landscape greening functions according to claim 1, characterized in that, The fixing mechanism includes a placing concave block (27) that fits and contacts the lower end of the annular life buoy. There are two limiting members arranged at intervals left and right above the annular life buoy. The limiting members include a fixing plate (28) fixedly connected to the protective fence (2). Two blocking rods (29) distributed front and rear with respect to the annular life buoy are fixedly connected to the lower end of the fixing plate (28). Two lifting rods (31) are fixedly connected to the lower end of the placing concave block (27). A locking box (30) is arranged below the lifting rods (31), and the locking box (30) is fixedly connected to the protective fence (2). The lower ends of the two lifting rods (31) penetrate the upper end surface of the locking box (30) and are slidably connected thereto. Two second springs (32) are fixedly connected between the placing concave block (27) and the upper end surface of the locking box (30).

7. A yacht with both rescue and landscape greening functions according to claim 6, characterized in that, One end of the two lifting rods (31) located inside the locking box (30) is a smooth spherical surface. A limiting plate (33) is arranged below the two lifting rods (31) inside the locking box (30). An electric telescopic rod (34) is fixedly installed on the protective fence (2), and the telescopic end of the electric telescopic rod (34) extends into the locking box (30) and is fixedly connected to the rear end of the limiting plate (33).