A sea rescue raft with a quick release mechanism

Abstract

The present application belongs to the technical field of life raft, and relates to a sea life raft with a quick release structure. The sea life raft comprises a raft body, symmetrical fixed soft nets are arranged on the lower side of the raft body, the fixed soft nets are fixedly connected with fixed pipes arranged at equal intervals, connecting ropes are slidably connected in the fixed pipes, the fixed soft nets are fixedly connected with connecting plates, the connecting ropes arranged at equal intervals on one side are collectively fixedly connected with a supporting plate, the supporting plate is fixedly connected with first clamps arranged at equal intervals, the connecting ropes arranged at equal intervals on the other side are collectively fixedly connected with a fixed plate, the fixed plate is slidably and rotatably connected with a rotating rod, and the rotating rod is fixedly connected with second clamps arranged at equal intervals and corresponding to the first clamps arranged at equal intervals. The first clamps and the second clamps wrap the raft body around the operator, so that the operator and the raft body jump into the sea at the same time, and the operator is always in contact with the raft body, without the need for the operator to swim to the life raft.

Description

Technical Field

[0001] This invention relates to the field of life raft technology, and more particularly to a marine life raft with a quick-release structure. Background Technology

[0002] Life rafts are essential life-saving equipment for ships and offshore platforms, providing temporary floating shelter and survival for people who have fallen into the water or are awaiting evacuation when the ship is in distress and sinks or during emergency evacuation. Their core function is to maintain the safety of crew members in adverse sea conditions while awaiting rescue. Life rafts come in both multi-person and single-person types.

[0003] The procedure for using a single-person sea life raft is as follows:

[0004] The operator first places the inflated life raft into the sea (or places the life raft into the sea first and then inflates it). After the life raft is in the water, the operator jumps into the water near the life raft and swims to the life raft. Although there is a connecting rope between the life raft and the hull, in windy and wavey weather, the life raft in the water will drift with the sea and move away from the operator. Moreover, the surging waves make it difficult for people who fall into the water to swim effectively to approach and grab the raft. For non-swimmers, it is even more difficult to make the life raft work. Summary of the Invention

[0005] To overcome the disadvantage that it is difficult for operators to approach and grab the raft, the present invention provides a marine life raft with a locking function and a quick-release structure.

[0006] The technical solution of the present invention is as follows: a marine life raft with a quick-release structure, comprising a raft body, a symmetrically distributed fixed soft net installed on the lower side of the raft body, fixed tubes of equal spacing fixedly connected to both sides of the fixed soft net, a connecting rope slidably connected inside the fixed tube, a connecting plate fixedly connected to the fixed soft net, a counterweight shell fixedly connected to the symmetrically distributed connecting plates, a guide rod rotatably connected to the connecting plate for adjacent connecting ropes to pass over, a pressure plate slidably connected to the counterweight shell, a connecting rope fixedly connected to the pressure plate on the side near the counterweight shell, a support plate fixedly connected to the connecting ropes of equal spacing on one side, a first hook of equal spacing fixedly connected to the support plate, a fixed plate fixedly connected to the connecting ropes of equal spacing on the other side, a rotating rod slidably and rotatably connected to the fixed plate, a second hook of equal spacing corresponding one-to-one with the first hook of equal spacing fixedly connected to the rotating rod, the second hook being used to lock the corresponding first hook.

[0007] As a preferred embodiment, a spring is fixedly connected between the pressure plate and the counterweight shell.

[0008] As a preferred embodiment, a float is provided on the side of the fixed soft net away from the counterweight shell.

[0009] As a preferred embodiment, the fixing plate is fixedly connected to guide frames that are evenly spaced and correspond one-to-one with the first hooks that are also evenly spaced. The guide frames are used to position the corresponding first hooks.

[0010] As a preferred embodiment, the fixed plate is fixedly connected to a fixed sleeve, and a first sealing ring is rotatably and slidably connected inside the fixed sleeve. The first sealing ring is fixedly connected to the rotating rod. An air bladder is provided inside the counterweight shell, and the pressure plate is used to compress the air bladder. The air bladder and the fixed sleeve are connected through an air guide tube. A float plate is slidably connected inside the counterweight shell, and the float plate is fixedly connected to the air bladder through a support member. A first through hole is provided on the lower side of the counterweight shell, and a first one-way valve is provided inside the first through hole of the counterweight shell.

[0011] As a preferred embodiment, the rotating rod is provided with a spline groove, and a sliding ring is slidably connected to the spline groove of the rotating rod. A torsion spring is fixedly connected between the sliding ring and the fixed plate.

[0012] As a preferred embodiment, a sealing cylinder is fixedly connected to the side of the fixing plate away from the fixing sleeve. The sealing cylinder is slidably and rotatably connected to the rotating rod. A second sealing ring is fixedly connected to the rotating rod inside the sealing cylinder. The second sealing ring is slidably and rotatably connected to the sealing cylinder.

[0013] As a preferred embodiment, the rotating rod is provided with a storage cavity, and the rotating rod is provided with a through groove communicating with the storage cavity. The sealing cylinder is fixedly connected with an arc-shaped plate for sealing the through groove. The rotating rod is provided with a plug for sealing the storage cavity. The sealing cylinder is provided with a second through hole, and a second one-way valve is provided in the second through hole of the sealing cylinder. The fixing sleeve is provided with a third through hole, and a third one-way valve is provided in the third through hole of the fixing sleeve. The storage cavity is filled with a substance for absorbing gas in the sealing cylinder.

[0014] As a preferred embodiment, the substance in the storage cavity is a NaOH solution, and the sealed cylinder is filled with CO2.

[0015] As a preferred embodiment, the diameter of the third through hole of the fixing sleeve is smaller than the inner diameter of the fixing sleeve.

[0016] In summary, this application includes at least one of the following beneficial technical effects: The invention uses a first hook and a second hook to enclose the operator within the raft, and a spring-driven pressure plate and connecting rope further secure the operator, allowing the operator and raft to jump into the sea simultaneously. This ensures the operator remains in contact with the raft, eliminating the need for the operator to swim to the life raft. The movement of the lever releases the restriction between the first and second hooks, allowing the raft to unfold rapidly for quick release. After the operator jumps into the sea, the float and counterweight ensure the operator's face is upward, guaranteeing normal breathing. The operator's outward expansion of their arms compresses the airbag, releasing the restriction between the first and second hooks and allowing the raft to unfold quickly, ensuring the operator's safety. This life raft also works for non-swimmers, as the NaOH solution absorbs the high concentration of CO2 in the storage cavity, further ensuring the raft fully unfolds after the operator jumps into the sea, assisting the operator in unfolding the raft. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a three-dimensional structural cross-sectional view of the present invention;

[0019] Figure 3 This is a three-dimensional structural diagram of the counterweight shell and pressure plate of the present invention;

[0020] Figure 4 This is a three-dimensional structural diagram of the counterweight shell and float plate of the present invention;

[0021] Figure 5 This is a three-dimensional structural diagram of the fixing plate and guide frame of the present invention;

[0022] Figure 6 This is a three-dimensional structural diagram of the present invention with the first and second hooks not properly engaged.

[0023] Figure 7 This is a three-dimensional structural diagram of the fixing plate and rotating rod of the present invention;

[0024] Figure 8 For the present invention Figure 7 A schematic diagram of the three-dimensional structure at point A in the middle;

[0025] Figure 9 This is a three-dimensional structural diagram of the sealing cylinder and the second sealing ring of the present invention.

[0026] The labels in the diagram are as follows: 1-Fixed soft net, 101-Raft body, 102-Connecting plate, 103-Float, 2-Fixing pipe, 3-Connecting rope, 4-Counterweight shell, 5-Guide rod, 6-Pressure plate, 601-Spring, 7-Support plate, 8-First hook, 9-Fixing plate, 901-Guide frame, 10-Rotating rod, 1001-Storage cavity, 1002-Through groove, 11-Second hook, 111-Sliding ring, 12-Fixing sleeve, 13-First sealing ring, 14-Airbag, 15-Air duct, 16-Float plate, 17-Sealing cylinder, 18-Second sealing ring, 19-Arc plate. Detailed Implementation

[0027] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0028] Example 1

[0029] When using existing life rafts, the operators are separated from the life raft itself, and the life raft needs to be placed in the water first. However, the operators cannot jump directly onto the life raft, but must jump into the seawater near the life raft. Due to factors such as wind and waves, it is difficult for the operators to approach the life raft, and it is even more difficult for operators who cannot swim to get onto the life raft.

[0030] A marine life raft with a quick-release mechanism, combined with Figures 1-6As shown, the system includes a raft body 101. Two symmetrically distributed fixed soft nets 1 are installed on the lower side of the raft body 101. The fixed soft nets 1 can be installed on the raft body 101 by adhesive bonding, facilitating installation. Three fixed tubes 2, evenly spaced front to back, are fixed to the lower side of the fixed soft nets 1. The fixed tubes 2 are flexible hoses, and connecting ropes 3 are slidably connected inside the fixed tubes 2. Connecting plates 102 are fixed to the fixed soft nets 1. Floats 103 are installed on the upper side of the fixed soft nets 1. When the two fixed soft nets 1 cause the two sides of the raft body 101 to bend towards the center, the two fixed soft nets 1 will cause the two floats 103 to move closer together. A counterweight shell 4 is fixed to both connecting plates 102. The upper part of the counterweight shell 4 consists of four vertical rods with right-angled cross-sections. After the fixed soft nets 1 are installed on the raft body 101, the four vertical rods of the counterweight shell 4 will contact the bottom of the raft body 101. A rotatable connection is provided on the upper side of the connecting plates 102 for adjacent connecting ropes 3 to pass over. The guide rod 5 and the counterweight shell 4 are slidably connected to the pressure plate 6. The guide rod 5 is lower than the pressure plate 6. The lower side of the connecting rope 3 is fixed to the pressure plate 6. Two springs 601 are symmetrically distributed front and back between the pressure plate 6 and the counterweight shell 4. The upper ends of the three connecting ropes 3 on the left are fixed to the support plate 7. The upper surface of the support plate 7 is fixed to three first hooks 8 that are evenly distributed front and back. The upper ends of the three connecting ropes 3 on the right are fixed to the fixing plate 9. The fixing plate 9 is slidably and rotatably connected to the rotating rod 10 through two straight plates. The rotating rod 10 is fixed to three second hooks 11 that are evenly distributed front and back and correspond one-to-one with the evenly distributed first hooks 8. The second hooks 11 are used to lock the corresponding first hooks 8. The fixing plate 9 is fixed to three guide frames 901 that are evenly distributed front and back and correspond one-to-one with the evenly distributed first hooks 8. The upper side of the guide frame 901 is provided with a gradient opening to facilitate the corresponding first hooks 8 to enter the guide frame 901.

[0031] like Figures 6-8 As shown, a fixing sleeve 12 is fixedly connected to the front side of the fixing plate 9 via a first clamping plate. A first sealing ring 13 is slidably connected within the fixing sleeve 12, sealing rotation. The first sealing ring 13 is fixedly connected to the front end of the rotating rod 10. An airbag 14 is located below the pressure plate 6 inside the counterweight shell 4. The airbag 14 is connected to the fixing sleeve 12 via an air guide pipe 15. The pressure plate 6 compresses the airbag 14, causing the gas inside the airbag 14 to enter the fixing sleeve 12 through the air guide pipe 15. A float plate 16 is slidably connected to the lower side of the counterweight shell 4. The upper side of plate 16 is fixedly connected to airbag 14 by a support member, which consists of a vertical plate and a flat plate. The horizontal plate is fixedly connected to airbag 14. The lower side of counterweight shell 4 is provided with a first through hole. A first one-way valve is provided in the first through hole of counterweight shell 4. Seawater enters the counterweight shell 4 through the first one-way valve in the first through hole. Rotating rod 10 is provided with a spline groove. Two sliding rings 111 are slidably connected to the spline groove of rotating rod 10. The two sliding rings 111 are respectively fixedly connected to the two straight plates of fixed plate 9 with torsion springs.

[0032] When this life raft is needed, the operator should place it vertically with the narrow side of raft 101 as the bottom, and... Figure 1 The upper side of the raft body 101 is pressed tightly against the back. The left hand pulls the support plate 7, causing the three first hooks 8 to move closer to the waist. At the same time, the right hand pulls the fixing plate 9, causing the three second hooks 11 and the three guide frames 901 to move closer together. Then, the operator pushes the three first hooks 8 into the three guide frames 901, achieving the desired effect. Figure 6 In the state shown, when the three first hooks 8 contact the three second hooks 11, the three second hooks 11 are squeezed by the adjacent first hooks 8 and together drive the rotating rod 10 to rotate clockwise. The rotating rod 10 drives the two sliding rings 111 to rotate clockwise. The torsion spring on the sliding ring 111 stores power. When the three first hooks 8 are fully inserted into the adjacent guide frame 901, the torsion of the torsion spring on the sliding ring 111 is released, causing the sliding ring 111 to rotate counterclockwise. The two sliding rings 111 drive the rotating rod 10 to rotate counterclockwise. The rotating rod 10 drives the three second hooks 11 to rotate counterclockwise and locks them with the adjacent first hooks 8.

[0033] As the support plate 7 and the fixed plate 9 approach each other, the support plate 7 pulls the pressure plate 6 downward via the three connecting ropes 3 on the left (the connecting ropes 3 slide within the adjacent fixed tubes 2), compressing the spring 601. At this point, the pressure plate 6 is flush with the guide rod 5. Subsequently, the three connecting ropes 3 pull the three fixed tubes 2 on the left, causing the fixed soft net 1 on the left to bend the left side of the raft 101 towards the center. Simultaneously, the fixed plate 9 causes the right side of the raft 101 to bend towards the center. When the first hook 8 engages with the adjacent second hook 11, the operator places their arm vertically, releasing the spring force of the compressed spring 601 and causing the pressure plate 6 to move upward. The raft 101 wraps around the operator via six connecting ropes 3, and the elasticity of the spring 601 further envelops the operator, increasing the pressure between the raft 101 and the operator. This ensures that the operator will not detach from the raft 101 during the process of jumping into the water. As the two fixed soft nets 1 pull the left and right sides of the raft 101 close to the operator, the two fixed soft nets 1 also pull the two floats 103 closer together and eventually move to the front of the operator. As the pressure plate 6 moves downward under the pull of the six connecting ropes 3, it will not come into contact with the airbag 14. After the operator is completely wrapped by the raft 101, the operator jumps into the sea.

[0034] After the operator jumps into the sea, the buoyancy of the two floats 103 and the gravity of the counterweight shell 4 keep the operator's face upward, ensuring normal breathing. Once the counterweight shell 4 contacts the seawater, the one-way valve in the first through-hole of the counterweight shell 4 opens, allowing seawater to enter. The float 16 moves upward under buoyancy, and the float 16, through the support, moves the airbag 14 upward until it contacts the pressure plate 6. Then, the operator extends their arms to the sides, and the six connecting ropes 3 move the pressure plate 6 downward, squeezing the airbag 14. Due to the one-way liquid inflow of the one-way valve in the first through-hole of the counterweight shell 4, the float 16 and its... The supporting components cannot move downwards. The pressure plate 6 squeezes the airbag 14, causing the gas inside the airbag 14 to be pushed into the fixed sleeve 12 through the air guide tube 15 and push the first sealing ring 13 to move backward. The pressure on the front side of the first sealing ring 13 in the fixed sleeve 12 increases. The first sealing ring 13 drives the rotating rod 10 to move backward. The rotating rod 10 drives the three second hooks 11 to move backward and misalign with the adjacent first hooks 8. When the second hooks 11 no longer contact the adjacent first hooks 8, the limit of the first hooks 8 is released, the left and right sides of the raft body 101 open, and finally the valve body raft body 101 quickly unfolds, achieving rapid release. The operator can then lie flat on the raft body 101.

[0035] During the jump into the sea, the operator's body will sway, compressing the raft 101 and causing the pressure plate 6 to move downwards. However, the pressure plate 6 will not contact the airbag 14, causing the first hook 8 and the second hook 11 to separate prematurely, resulting in the premature deployment of the raft 101 and separation of the operator from it, thus affecting the operator's safety. This life raft is a single-person life raft, lightweight and easy for operators to carry. The first hook 8 and the second hook 11 enclose the operator within the raft 101, and the spring 601 drives the pressure plate 6 and connecting rope 3 to secure the operator. The locking mechanism further ensures that the operator and raft 101 jump into the sea simultaneously, guaranteeing that the operator remains in contact with raft 101 without needing to jump onto the life raft. After the operator jumps into the sea, the float 103 and counterweight shell 4 ensure that the operator's face is facing upwards, allowing for normal breathing. By expanding the operator's arms to the sides, the airbag 14 is compressed, releasing the restriction between the first hook 8 and the second hook 11, allowing raft 101 to deploy rapidly and ensuring the operator's safety. This life raft can also be used for non-swimmers.

[0036] Example 2

[0037] Based on Example 1, a marine life raft with a quick-release structure, combined with Figure 6 , Figure 7 and Figure 9As shown, a sealing cylinder 17 is fixedly connected to the rear side of the fixed plate 9 via a second clamping plate. The rear side of the sealing cylinder 17 is slidably and rotatably connected to the rotating rod 10. The front side of the sealing cylinder 17 is slidably and rotatably connected to the rotating rod 10. A second sealing ring 18 located inside the sealing cylinder 17 is fixedly connected to the rotating rod 10. The second sealing ring 18 is located on the front side inside the sealing cylinder 17 and is slidably and rotatably connected to the sealing cylinder 17. A storage cavity 1001 is provided on the rear side of the rotating rod 10. A through groove 1002 communicating with the storage cavity 1001 is provided on the right side of the rotating rod 10. An arc-shaped plate 19 for sealing the through groove 1002 is fixedly connected to the sealing cylinder 17. A plug for sealing the storage cavity 1001 is provided on the rotating rod 10. A second through hole is provided on the upper part of the rear side of the sealing cylinder 17. A second one-way valve is provided in the second through hole of the sealing cylinder 17. When the gas is discharged through the second through hole, the second one-way valve of the sealing cylinder 17 opens. A third through hole is provided at the lower part of the front side of the fixed sleeve 12. A third one-way valve is provided in the third through hole of the fixed sleeve 12. When the outside gas enters the fixed sleeve 12 through the third through hole, the third one-way valve of the fixed sleeve 12 opens. The diameter of the third through hole of the fixed sleeve 12 is smaller than the inner diameter of the fixed sleeve 12. When the rotating rod 10 drives the first sealing ring 13 to move to the left, the first sealing ring 13 and the rotating rod 10 can only move slowly. The storage cavity 1001 is filled with a substance for absorbing the gas in the sealing cylinder 17. The substance in the storage cavity 1001 is NaOH solution. The sealing cylinder 17 is filled with high-concentration atmospheric pressure CO2. The NaOH solution will react with the high-concentration CO2, thereby reducing the gas pressure in the sealing cylinder 17 and driving the second sealing ring 18 and the rotating rod 10 to move backward.

[0038] Before using this life raft, the operator opens the plug of the rotating rod 10 and puts NaOH solution into the storage cavity 1001. Then, the plug of the rotating rod 10 is used to seal the storage cavity 1001, and the passage 1002 is blocked by the arc-shaped plate 19, keeping the storage cavity 1001 sealed. High-concentration CO2 is then introduced into the sealing cylinder 17. During the process of the first hook 8 pressing the second hook 11, the rotating rod 10 rotates clockwise, and the passage 1002 is no longer blocked by the arc-shaped plate 19. Simultaneously, the NaOH solution in the storage cavity 1001 enters the storage cavity 1001 due to gravity. The NaOH solution absorbs the CO2 in the storage cavity 1001, thus reducing the concentration of CO2 within the storage cavity 1001. The air pressure drops rapidly. After the first hook 8 stops pressing the second hook 11, the rotating rod 10 rotates counterclockwise, and the arc plate 19 continues to block the through groove 1002. The pressure in the storage cavity 1001 drives the rotating rod 10 to move backward through the second sealing ring 18. During the backward movement of the rotating rod 10, the rotating rod 10 drives the first sealing ring 13 to move backward. The pressure on the front side of the first sealing ring 13 in the fixed sleeve 12 decreases, and the third one-way valve in the third through hole of the fixed sleeve 12 opens. External gas enters the fixed sleeve 12 through the third through hole. Because the diameter of the third through hole of the fixed sleeve 12 is small, external gas cannot quickly enter the fixed sleeve 12 through the third through hole. Therefore, the first sealing ring 13 will... The lever 10 moves slowly backward, simultaneously moving backward to prevent the operator from jumping into the water before the lever 10 causes the three second hooks 11 to misalign with the three first hooks 8, thus opening the raft 101 in advance. During the backward movement of the first sealing ring 13, the airbag 14 is not compressed; instead, external gas enters the fixed sleeve 12, reducing the resistance to the backward movement of the lever 10. This ensures that the negative pressure inside the sealing cylinder 17 is sufficient to drive the first sealing ring 13 backward through the second sealing ring 18 and the lever 10. Once the operator jumps into the sea, the slow backward movement of the first sealing ring 13 and the lever 10 causes the three second hooks 11 to misalign with the three first hooks 8, thus opening the raft 101. To ensure that the raft 101 can be fully deployed after the operator jumps into the sea, and to assist operators with weak arm strength in deploying the raft 101, in Embodiment 1, the pressure inside the fixed sleeve 12 increases by squeezing the airbag 14, causing the first sealing ring 13 to move backward. The first sealing ring 13 then drives the second sealing ring 18 to move backward via the rotating rod 10. The gas inside the sealing cylinder 17 is discharged through the one-way valve of the second through hole. After the operator jumps into the sea, the NaOH solution reacts with the CO2 inside the sealing cylinder 17. The operator actively expands his arm, causing the rotating rod 10 to drive the second sealing ring 18 to move backward, which also causes the gas inside the sealing cylinder 17 to be discharged through the one-way valve of the second through hole.

[0039] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention are existing technologies known to those skilled in the art.

Claims

1. A marine survival craft with a quick release mechanism, characterised in that: The utility model provides a raft (101) is equipped with the fixed soft net (1) of symmetrical distribution on the downside, both sides of fixed soft net (1) are respectively fixed with the fixed pipe (2) of equidistance distribution, the fixed pipe (2) is connected with the connecting rope (3) of sliding inside, fixed soft net (1) is fixed with the connecting plate (102), the connecting plate (102) of symmetrical distribution is jointly fixed with the counterweight shell (4), the connecting plate (102) is rotatably connected with the guide rod (5) that adjacent connecting rope (3) passes, the counterweight shell (4) is connected with the pressing plate (6) of sliding, one side of connecting rope (3) is close to the counterweight shell (4) and is fixed with the pressing plate (6), one side equidistance distribution connecting rope (3) is jointly fixed with the support plate (7), the support plate (7) is fixed with the first hook (8) of equidistance distribution, the other side equidistance distribution connecting rope (3) is jointly fixed with the fixed plate (9), the fixed plate (9) is rotatably and slidably connected with the rotating rod (10), the rotating rod (10) is fixed with the second hook (11) of equidistance distribution and with equidistance distribution first hook (8) one to one correspondence, and the second hook (11) is used for locking corresponding first hook (8).

2. A marine survival craft with quick release structure according to claim 1, characterized in that: The spring (601) is fixed between the pressing plate (6) and the counterweight shell (4).

3. A marine survival craft with quick release structure according to claim 1, characterized in that: The fixed soft net (1) is provided with a float (103) away from the counterweight shell (4) on one side.

4. A marine survival craft with quick release structure according to claim 1, characterized in that: The fixed plate (9) is fixed with equidistantly distributed guide frames (901) corresponding to the equidistantly distributed first hooks (8), and the guide frames (901) are used for positioning the corresponding first hooks (8).

5. A marine survival craft with quick release structure according to claim 4, characterised in that: The fixed plate (9) is fixed with a fixed sleeve (12), a first sealing ring (13) is sealingly rotatably and slidably connected in the fixed sleeve (12), the first sealing ring (13) is fixed with the rotating rod (10), the counterweight shell (4) is provided with an air bag (14), the pressing plate (6) is used for pressing the air bag (14), the air bag (14) and the fixed sleeve (12) are communicated through an air guide pipe (15), the counterweight shell (4) is slidably connected with a floating plate (16), the floating plate (16) is fixed with the air bag (14) through a support, a first through hole is arranged on the lower side of the counterweight shell (4), and a first one-way valve is arranged in the first through hole of the counterweight shell (4).

6. A marine survival craft with quick release structure according to claim 5, characterised in that: The rotating rod (10) is provided with a spline groove, a sliding ring (111) is slidably connected in the spline groove of the rotating rod (10), and a torsion spring is fixed between the sliding ring (111) and the fixed plate (9).

7. A marine survival craft with quick release structure according to claim 6, characterised in that: The fixed plate (9) is fixed with a sealing cylinder (17) away from the fixed sleeve (12) on one side, the rotating rod (10) is sealingly slidably and rotatably connected with the sealing cylinder (17), the rotating rod (10) is fixed with a second sealing ring (18) located in the sealing cylinder (17), and the second sealing ring (18) is sealingly slidably and rotatably connected with the sealing cylinder (17).

8. A marine survival craft with quick release structure according to claim 7, characterised in that: The rotating rod (10) is provided with a storage cavity (1001), the rotating rod (10) is provided with a through groove (1002) in communication with the storage cavity (1001), the sealing cylinder (17) is fixedly connected with an arc-shaped plate (19) for blocking the through groove (1002), the rotating rod (10) is provided with a plug for blocking the storage cavity (1001), the sealing cylinder (17) is provided with a second through hole, a second one-way valve is arranged in the second through hole of the sealing cylinder (17), the fixing sleeve (12) is provided with a third through hole, and a third one-way valve is arranged in the third through hole of the fixing sleeve (12), and the storage cavity (1001) is filled with a substance for absorbing gas in the sealing cylinder (17).

9. A marine survival craft with quick release structure according to claim 8, characterised in that: The substance in the storage cavity (1001) is NaOH solution, and the sealing cylinder (17) is filled with CO2.

10. A marine survival craft with quick release structure according to claim 8, characterized in that: The aperture of the third through hole of the fixing sleeve (12) is smaller than the inner diameter of the fixing sleeve (12).

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