A folding life raft for underwater rescue

Abstract

The application discloses a folding life raft for underwater rescue and relates to the technical field of underwater rescue, which comprises a ship body, an inflation module installed at the tail of the ship body, a connecting plate fixedly installed at the tail of the ship body, a one-way pipe communicated with the inside of the ship body and fixedly installed on the connecting plate, and a blocking assembly fixedly installed on the one-way pipe. An air injection nozzle is fixedly installed on the one-way pipe and used for inflating the inside of the ship body through external air injection equipment. A gas guide pipe is fixedly installed on the blocking assembly, and the blocking assembly is used for isolating the gas guide pipe from the one-way pipe. The application has the advantages that not only can the external air injection equipment be used for inflation, but also the ship body can be used for inflation, the situation that the ship body cannot be continuously inflated due to air leakage during rescue can be effectively avoided, the safety is higher, in addition, the inflation thrust can be automatically changed according to the inflation air pressure, and the inflation pressure is ensured to be sufficient.

Description

Technical Field

[0001] This invention relates to the field of underwater rescue technology, and in particular to a foldable life raft for underwater rescue. Background Technology

[0002] Inflatable collapsible life rafts, also known as pneumatic life rafts, are a type of water rescue equipment that can be quickly inflated and deployed in emergency situations. They are mainly used for the emergency evacuation and rescue of people in distress at sea. Inflatable collapsible life rafts use CO2 cylinders to release gas, which is then filled into an air bladder to rapidly expand and provide buoyancy.

[0003] The existing type of foldable life raft for firefighting has the following shortcomings: when a flood occurs, firefighters rescue victims onto the life raft, increasing its weight and inertia. The floodwaters cause the life raft to move, and if it encounters sharp obstacles and cannot slow down in time, it may collide with the obstacles, leading to damage and air leakage. Therefore, CN111409794A discloses a type of foldable life raft for firefighting, which includes a main body, a fixing block, and handles. The fixing block is located at the rear of the main body, and there are four handles installed on both sides of the main body. The main body includes a base plate, an inflation port, and a buffer plate. The buffer plate includes a fixing plate, a rubber ball, a contact plate, and a connecting block. The rubber ball consists of a rubber body, a mounting block, and an air hole. The air hole includes a fixing seat, a rotating shaft, and a cover plate.

[0004] The aforementioned fire-fighting folding life raft has a contact plate on its outer side to prevent the main body from directly contacting sharp obstacles. Multiple rubber balls act as a buffer against the contact plate, and the cover plate is fixed in the fixed seat by a pivot. This allows the airflow to be slowly discharged through the through holes in the cover plate when the rubber balls are compressed, slowing down the deformation of the rubber balls and directly reducing the impact force on the main body from obstacles, thus preventing damage to the main body and air leakage.

[0005] However, the aforementioned and existing inflatable life rafts require a backup mobile power source for inflation. If the power source is damaged or the power is cut off during a rescue operation, inflation cannot be performed, which limits their use.

[0006] Therefore, a new type of foldable life raft for underwater rescue can be adopted to overcome the shortcomings of existing technologies. Summary of the Invention

[0007] The purpose of this invention is to solve the problem of certain limitations in the use of existing technologies, and to propose a foldable life raft for underwater rescue.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A foldable life raft for underwater rescue includes a hull and an inflatable module installed at the stern of the hull.

[0010] The inflation module consists of a connecting plate fixedly installed at the stern of the hull, a one-way pipe connected to the interior of the hull and fixed to the connecting plate, and a blocking component fixed to the one-way pipe. An air injection nozzle is fixedly installed on the one-way pipe for inflating the hull with air through an external air injection device.

[0011] An air duct is fixedly installed on the blocking assembly. The blocking assembly is used to isolate the air duct from the one-way pipe. An air injection assembly is installed on the air duct for inflating the hull with air.

[0012] The gas injection assembly is equipped with a drive assembly for driving the gas injection assembly to operate and inflate the hull with gas.

[0013] Preferably, the blocking assembly includes a housing fixedly installed between the one-way tube and the air guide tube, a plurality of shafts are rotatably mounted on the housing, a sealing plate is fixedly installed on each shaft, and a second gear is fixedly installed on each shaft, and a driving mechanism that cooperates with the plurality of second gears is installed on the housing.

[0014] Preferably, the driving mechanism includes multiple internal gear rings rotatably mounted inside the housing and meshing with corresponding second gears, and a double-sided gear ring rotatably mounted inside the housing and meshing with one of the second gears. Adjacent internal gear rings and the internal gear rings and the double-sided gear rings are connected by arc-shaped rods. A first gear meshing with the outer teeth of the double-sided gear rings is rotatably mounted on the housing. A rocker arm is engaged on the first gear. A locking structure that cooperates with the first gear is mounted on the housing.

[0015] Preferably, the locking structure includes a fixed plate fixedly mounted on the housing, a toothed plate that meshes with the first gear is slidably mounted on the fixed plate, and two spring rods are fixedly mounted between the toothed plate and the fixed plate.

[0016] Preferably, the air injection assembly includes a cylinder body fixedly mounted on an air guide pipe, two bushings fixedly mounted on the cylinder body, a rotating shaft rotatably mounted inside each of the two bushings, a rotating disk fixedly mounted on each of the two rotating shafts, a protrusion fixedly mounted between the two rotating disks, a connecting rod rotatably mounted on the protrusion, a piston disk slidably mounted inside the cylinder body, and the end of the connecting rod away from the protrusion being rotatably connected to the piston disk.

[0017] Preferably, the drive assembly includes two swing arms rotatably mounted outside the corresponding bushing, a rotating shaft is rotatably mounted on both swing arms, a positioning mechanism is installed between one of the swing arms and the cylinder body, two first blades are fixedly mounted on the rotating shaft, the rotating shaft and the rotating shaft are driven by a transmission track, and a second blade is fixedly mounted on the rotating shaft.

[0018] Preferably, the positioning mechanism includes a fan-shaped perforated plate fixedly installed on the swing arm, and a slot is provided on the cylinder body. The fan-shaped perforated plate and the slot are fixed together by a bolt.

[0019] Preferably, the swing arm is equipped with a tension control mechanism to change the tension of the drive track and ensure that the drive track is in a taut state.

[0020] Preferably, the second blade consists of a propeller wheel and multiple propeller plates, each of which is slidably mounted on the propeller wheel, and an adjustment mechanism is installed between the propeller wheel and the multiple propeller plates.

[0021] Preferably, the adjustment mechanism includes a first rubber ring fixedly mounted on the swing arm, a fixed ring fixedly mounted on the paddle wheel, a plurality of lead screws rotatably mounted on the fixed ring, a second rubber ring fixedly mounted on each lead screw and fitting against the first rubber ring, a threaded sleeve rotatably mounted on each lead screw, a plurality of connecting rods fixedly mounted on each threaded sleeve, a connecting block fixedly mounted on the corresponding plurality of connecting rods, and each connecting block being fixedly connected to the corresponding paddle plate.

[0022] Compared with existing technologies, the advantages of this invention are:

[0023] 1. When this underwater rescue folding life raft is inflated, it is equipped with an air inlet, a one-way pipe and an air inlet assembly. It can be inflated not only by external air inlet equipment, but also by manual air inlet in case of emergency. It has strong emergency fault tolerance and can effectively prevent the inability to inflate in an emergency due to the failure of external air inlet equipment.

[0024] 2. When this underwater rescue folding life raft is inflated, it is equipped with a first blade and a second blade. By pulling the hull on the water surface, the first blade and the second blade rotate, which drives the inflation component to operate and realize the inflation operation. In the event of air leakage during rescue operations, air can be added to the hull, which can effectively avoid the risk of reduced safety due to air leakage. In addition, in special circumstances, the inflation component can be operated by a rocker to operate for manual inflation, making it more applicable.

[0025] 3. When this underwater rescue folding life raft is inflated, the position of the paddle blades is adjusted by setting an adjustment mechanism, thereby changing the expansion area of ​​the second paddle blade. As the inflation volume gradually increases, the internal pressure of the hull gradually increases. At this time, by changing the expansion area of ​​the second paddle blade, the torque generated by the second paddle blade under the same hull speed can be changed, which can provide sufficient thrust for inflation and ensure sufficient inflation pressure. Attached Figure Description

[0026] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0027] Figure 1 This is a schematic diagram of the structure of a foldable life raft for underwater rescue proposed in this invention;

[0028] Figure 2 for Figure 1 Detailed schematic diagram of the structure after rotation at a certain angle;

[0029] Figure 3 for Figure 2 Detailed schematic diagram of the enlarged structure of the air-filled module;

[0030] Figure 4 for Figure 3 Detailed schematic diagram of the structure after rotation at a certain angle;

[0031] Figure 5 for Figure 4 Detailed schematic diagram of the enlarged structure of the blocking component;

[0032] Figure 6 for Figure 5 Detailed schematic diagram of the frontal planar structure after removing the outer shell;

[0033] Figure 7 for Figure 3 Detailed enlarged structural diagram of the gas injection assembly and drive assembly after they have rotated a certain angle;

[0034] Figure 8 for Figure 7 Detailed schematic diagram of the structure after rotation at a certain angle;

[0035] Figure 9 for Figure 8 Detailed cross-sectional view of the central air injection cylinder and air delivery pipe;

[0036] Figure 10 for Figure 9 Detailed schematic diagram of the structure after removing the air injection cylinder and air delivery pipe;

[0037] Figure 11 for Figure 10 Detailed schematic diagram of the frontal planar structure;

[0038] Figure 12 for Figure 10 Detailed schematic diagram of the structure of the rotating shaft, piston disc, connecting rod, and rotating disc;

[0039] Figure 13 for Figure 10 Detailed schematic diagram of the second blade and one of the swing arms;

[0040] Figure 14 for Figure 13 Detailed enlarged structural diagram after removing the swing arm and the fan-shaped perforated plate;

[0041] Figure 15 for Figure 14 Detailed diagram of the decomposed structure;

[0042] Figure 16 for Figure 15 A detailed schematic diagram of one of the adjustment mechanisms and the first rubber ring.

[0043] In the diagram: 1. Hull, 2. Inflation module, 3. Blocking assembly, 4. Drive assembly, 5. Inflation assembly, 6. Air guide pipe, 7. Connecting plate, 8. One-way pipe, 9. Inflation nozzle, 10. Outer shell, 11. Sealing plate, 12. First gear, 13. Gear plate, 14. Spring rod, 15. Rocker arm, 16. Internal gear ring, 17. Second gear, 18. Double-sided gear ring, 19. Rotating shaft, 20. Swing arm, 21. Bushing, 22. Perforated fan plate, 23. Transmission track, 24. First blade, 25. Piston disc, 26. Tension control mechanism, 27. Second blade, 28. Rotating disk, 29. Connecting rod, 30. Rotating shaft, 31. Paddle wheel, 32. Paddle plate, 33. Adjustment mechanism, 34. Fixed ring, 35. First rubber ring, 36. Second rubber ring, 37. Lead screw, 38. Threaded sleeve, 39. Connecting rod, 40. Connecting block. Detailed Implementation

[0044] 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.

[0045] Example 1: Refer to Figures 1-4 A foldable life raft for underwater rescue includes a hull 1 and an inflatable module 2 installed at the stern of the hull 1.

[0046] The inflation module 2 consists of a connecting plate 7 fixedly installed at the stern of the hull 1, a one-way pipe 8 connected to the interior of the hull 1 and fixed on the connecting plate 7, and a blocking component 3 fixed on the one-way pipe 8. An air injection nozzle 9 is fixedly installed on the one-way pipe 8 for inflating the hull 1 with air through an external air injection device.

[0047] The external air injection device includes a power bank and an air pump. Air is injected into the air injection nozzle 9 through the air pump. Since it is an existing device, it will not be described in detail here.

[0048] The function of the one-way pipe 8 is to ensure one-way air intake and avoid backflow of air. The hull 1 is equipped with a vent valve for releasing air when folding.

[0049] An arc-shaped mounting plate that mates with the connecting plate 7 is fixedly installed at the stern of the hull 1, and the connecting plate 7 and the arc-shaped mounting plate are fixed together by bolts.

[0050] Example 2: This example differs from Example 1 in that: (Refer to...) Figures 3-16 An air duct 6 is fixedly installed on the blocking component 3. The blocking component 3 is used to isolate the air duct 6 from the one-way pipe 8. An air injection component 5 is installed on the air duct 6 for filling the hull 1 with air.

[0051] The blocking assembly 3 includes a housing 10 fixedly installed between the one-way tube 8 and the air guide tube 6. Multiple shafts are rotatably mounted on the housing 10. A sealing plate 11 is fixedly installed on each shaft, and a second gear 17 is fixedly installed on each shaft. A driving mechanism that cooperates with the multiple second gears 17 is installed on the housing 10.

[0052] The driving mechanism includes multiple internal gear rings 16 rotatably mounted inside the housing 10 and meshing with corresponding second gears 17, and a double-sided gear ring 18 rotatably mounted inside the housing 10 and meshing with one of the second gears 17. Adjacent internal gear rings 16 and internal gear rings 16 and double-sided gear rings 18 are connected by arc-shaped rods. A first gear 12 rotatably mounted on the housing 10 and meshing with the external teeth of the double-sided gear ring 18 is also mounted on the housing 10. A rocker arm 15 is engaged on the first gear 12. A locking structure that cooperates with the first gear 12 is mounted on the housing 10.

[0053] After inflation, the rocker arm 15 drives the first gear 12 to rotate, which in turn drives the double-sided gear ring 18 to rotate. The rotation of the double-sided gear ring 18 drives multiple internal gear rings 16 to rotate through the arc-shaped rod, which in turn drives multiple second gears 17 to rotate. The rotation of the second gears 17 drives the shaft to rotate, which in turn drives the corresponding sealing plate 11 to rotate, thus realizing the opening and closing of the sealing plate 11.

[0054] When inflating, the sealing plate 11 is kept open, and when inflating is stopped, the sealing plate 11 is closed. This setting is to block the one-way pipe 8 while the hull 1 is moving, so as to prevent water from entering the hull 1 through the one-way pipe 8.

[0055] The locking structure includes a fixed plate fixedly mounted on the housing 10, a toothed plate 13 that meshes with the first gear 12 is slidably mounted on the fixed plate, and two spring rods 14 are fixedly mounted between the toothed plate 13 and the fixed plate.

[0056] Because the hull 1 will bump when it is sailing, the sealing plate 11 will rotate under the bump. In order to prevent it from rotating, the toothed plate 13 is locked into the first gear 12 by the spring rod 14.

[0057] The air injection assembly 5 is equipped with a drive assembly 4, which is used to drive the air injection assembly 5 to operate and inflate the hull 1 with air.

[0058] The air injection assembly 5 includes a cylinder body fixedly installed on the air guide pipe 6. Two bushings 21 are fixedly installed on the cylinder body. A rotating shaft 19 is rotatably installed inside each of the two bushings 21. A rotating disk 28 is fixedly installed on each of the two rotating shafts 19. A protrusion is fixedly installed between the two rotating disks 28. A connecting rod 29 is rotatably installed on the protrusion. A piston disk 25 is slidably installed inside the cylinder body. The end of the connecting rod 29 away from the protrusion is rotatably connected to the piston disk 25.

[0059] Both ends of the rotating shaft 19 are provided with hexagonal grooves, and the end of the rocker arm 15 is fixed with a hexagonal protrusion. When manually inflating, the hexagonal protrusion of the rocker arm 15 is inserted into the hexagonal groove, and the rocker arm 15 is rotated to drive the rotating shaft 19 to rotate. The rotation of the rotating shaft 19 will drive the rotating disk 28 to rotate through the protrusion, thereby driving the connecting rod 29 to reciprocate. The connecting rod 29 will drive the piston disk 25 to reciprocate in the cylinder. An air inlet is provided on the side of the cylinder. The position of the air inlet is within the reciprocating range of the piston disk 25. When the piston disk 25 is pushed forward, it forces the air in the cylinder into the hull 1. When the piston disk 25 is pulled back beyond the air inlet, external air will enter the cylinder. This reciprocating motion realizes the inflation operation.

[0060] Since the air intake is open, water inevitably enters the cylinder. Therefore, the air intake needs to be waterproofed. This is an existing technology and an obvious technical defect, which will not be elaborated here.

[0061] Drive assembly 4 includes two swing arms 20 rotatably mounted outside the corresponding bushing 21, and a rotating shaft 30 rotatably mounted on both swing arms 20. A positioning mechanism is installed between one of the swing arms 20 and the cylinder body. Two first blades 24 are fixedly mounted on the rotating shaft 30. The rotating shaft 30 is driven by a transmission track 23 to the rotating shaft 19. A second blade 27 is fixedly mounted on the rotating shaft 30.

[0062] Rotate the swing arm 20 so that half of the first blade 24 and the second blade 27 are submerged in the water. Then, fix the swing arm 20 through the positioning structure. Then drag the hull 1. Under the action of water resistance, the first blade 24 and the second blade 27 will rotate, thereby driving the rotating shaft 30 to rotate. The rotation of the rotating shaft 30 will drive the rotating shaft 19 to rotate through the transmission track 23, thereby driving the air injection component 5 to operate and perform the inflation operation.

[0063] The positioning mechanism includes a fan-shaped perforated plate 22 fixedly installed on the swing arm 20, and a slot is provided on the cylinder body. The fan-shaped perforated plate 22 and the slot are fixed together by a bolt.

[0064] During inflation, rotate the swing arm 20 to a certain angle, insert the plug through the perforated plate 22 into the slot, and fix the swing arm 20. During rescue, rotate the swing arm 20 to rotate the first blade 24 and the second blade 27 to the water surface. This reduces the resistance of the hull 1 and makes the hull 1 move more smoothly on the water. If the hull 1 leaks air, half of the first blade 24 and the second blade 27 are submerged in the water during the movement of the hull 1 to perform an air replenishment operation.

[0065] The swing arm 20 is equipped with a tension control mechanism 26, which is used to change the tension of the transmission track 23 to ensure that the transmission track 23 is in a taut state.

[0066] The tension control mechanism 26 is an existing elastic tension adjustment mechanism used to adjust the tension of the transmission track 23, keep the transmission track 23 taut, ensure timely transmission response, and reduce the probability of slippage.

[0067] The second blade 27 consists of a blade wheel 31 and multiple blades 32. Each blade 32 is slidably mounted on the blade wheel 31. An adjustment mechanism 33 is installed between the blade wheel 31 and the multiple blades 32.

[0068] The adjustment mechanism 33 includes a first rubber ring 35 fixedly installed on the swing arm 20, a fixed ring 34 fixedly installed on the paddle wheel 31, a plurality of lead screws 37 rotatably installed on the fixed ring 34, a second rubber ring 36 fixedly installed on each lead screw 37 and fitting against the first rubber ring 35, a threaded sleeve 38 rotatably installed on each lead screw 37, a plurality of connecting rods 39 fixedly installed on each threaded sleeve 38, and a connecting block 40 fixedly installed on the corresponding plurality of connecting rods 39, and each connecting block 40 is fixedly connected to the corresponding paddle plate 32;

[0069] As the air inside hull 1 increases during inflation, the internal pressure also increases, leading to greater thrust from piston disc 25. To ensure smooth inflation without increasing the speed of hull 1, the thrust of piston disc 25 needs to be increased. Therefore, the expansion area of ​​the second blade 27 is increased to alter the resistance between the blade and the water. Greater resistance results in greater torque from the second blade 27, which, through transmission, increases the thrust of piston disc 25. The specific implementation is as follows:

[0070] As the first blade 24 and the second blade 27 rotate, the fixed ring 34 rotates, and the lead screw 37 also rotates along with the fixed ring 34, making circular motion around the axis 30. The second rubber ring 36 on the lead screw 37 also makes circular motion, while the first rubber ring 35 on the swing arm 20 remains stationary. Therefore, the first rubber ring 35 and the second rubber ring 36 will rotate relative to each other, and the first rubber ring 35 and the second rubber ring 36 will always be in contact. This will cause the second rubber ring 36 to rotate around the central axis of the lead screw 37 (the first rubber ring 35...). 5 and the second rubber ring 36 can also be replaced by a bevel gear). The screw 37 rotates, causing the threaded sleeve 38 to move on the screw 37. The connecting rod 39 drives the connecting block 40 to move, thereby driving the paddle plate 32 to move. (The paddle plate 32 can only move along the fixed direction of the paddle wheel 31, so the connecting block 40, the connecting rod 39 and the threaded sleeve 38 can only move in the same direction and will not rotate. Therefore, the rotation of the screw 37 will drive the threaded sleeve 38 to move on the screw 37.) When resetting, simply rotate the first blade 24 and the second blade 27 in the opposite direction.

[0071] The specific operating steps of this device are as follows:

[0072] The rocker arm 15 drives the first gear 12 to rotate, which in turn drives the double-sided gear ring 18 to rotate. The rotation of the double-sided gear ring 18 drives multiple internal gear rings 16 to rotate via the arc-shaped rod, which in turn drives multiple second gears 17 to rotate. The rotation of the second gears 17 drives the shaft to rotate, which in turn drives the corresponding sealing plate 11 to rotate, opening the sealing plate 11. The spring rod 14 then locks the first gear 12 by engaging the gear plate 13. When inflation stops, the sealing plate 11 is closed.

[0073] Inflation via external inflation device: Inflation is performed through the air injection nozzle 9;

[0074] Hand-cranked inflation: Insert the crank 15 into the rotating shaft 19, and then drive the rotating shaft 19 to rotate. The rotation of the rotating shaft 19 will drive the rotating disk 28 to rotate through the protrusion, thereby driving the connecting rod 29 to reciprocate. The connecting rod 29 will drive the piston disk 25 to reciprocate in the cylinder. When the piston disk 25 is pushed forward, it will force the air in the cylinder into the hull 1. When the piston disk 25 is pulled back beyond the air inlet, the outside air will enter the cylinder. In this way, the inflation operation is achieved by reciprocating.

[0075] When the first blade 24 and the second blade 27 are inflated and replenished: rotate the swing arm 20 so that half of the first blade 24 and the second blade 27 are submerged in water, insert the plug through the fan-shaped perforated plate 22 into the slot, and fix the swing arm 20.

[0076] Next, the hull 1 is dragged to move on the water surface. Under the action of water resistance, the first blade 24 and the second blade 27 will rotate, which will drive the shaft 30 to rotate. The rotation of the shaft 30 will drive the rotating shaft 19 to rotate through the transmission track 23. The rotation of the rotating shaft 19 will drive the rotating disk 28 to rotate through the convex column, which will drive the connecting rod 29 to reciprocate. The connecting rod 29 will drive the piston disk 25 to reciprocate in the cylinder. When the piston disk 25 is pushed forward, it will force the air in the cylinder into the hull 1.

[0077] During inflation, the air inside the hull 1 increases, and the internal pressure of the hull 1 increases. The rotation of the first blade 24 and the second blade 27 will drive the fixed ring 34 to rotate, and the lead screw 37 will also rotate with the fixed ring 34, making circular motion around the pivot 30. The second rubber ring 36 on the lead screw 37 will also make circular motion, while the first rubber ring 35 on the swing arm 20 will not move. Therefore, the first rubber ring 35 and the second rubber ring 36 will rotate relative to each other, and the first rubber ring 35 and the second rubber ring 36 will always be in contact. Therefore, the second rubber ring 36 will be driven to rotate around the central axis of the lead screw 37. The rotation of the lead screw 37 will drive the threaded sleeve 38 to move on the lead screw 37, and drive the connecting block 40 to move through the connecting rod 39, thereby driving the propeller 32 to move. To reset, simply rotate the first blade 24 and the second blade 27 in the opposite direction.

[0078] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A folding life raft for underwater rescue, comprising a hull (1), characterized in that, It also includes an air-filled module (2) installed at the stern of the hull (1); The inflation module (2) consists of a connecting plate (7) fixedly installed at the stern of the hull (1), a one-way pipe (8) connected to the interior of the hull (1) and fixed on the connecting plate (7), and a blocking component (3) fixed on the one-way pipe (8). An air injection nozzle (9) is fixedly installed on the one-way pipe (8) for inflating the hull (1) with air through an external air injection device. An air duct (6) is fixedly installed on the blocking component (3). The blocking component (3) is used to isolate the air duct (6) from the one-way pipe (8). An air injection component (5) is installed on the air duct (6) for filling the hull (1) with air. The air injection assembly (5) is equipped with a drive assembly (4) for driving the air injection assembly (5) to operate and inflate the hull (1). The air injection assembly (5) includes a cylinder fixedly installed on the air guide pipe (6). Two bushings (21) are fixedly installed on the cylinder. A rotating shaft (19) is rotatably installed inside each of the two bushings (21). A rotating disk (28) is fixedly installed on each of the two rotating shafts (19). A protrusion is fixedly installed between the two rotating disks (28). A connecting rod (29) is rotatably installed on the protrusion. A piston disk (25) is slidably installed inside the cylinder. The end of the connecting rod (29) away from the protrusion is rotatably connected to the piston disk (25). The drive assembly (4) includes two swing arms (20) rotatably mounted outside the corresponding bushing (21). A rotating shaft (30) is rotatably mounted on both swing arms (20). A positioning mechanism is installed between one of the swing arms (20) and the cylinder body. Two first blades (24) are fixedly mounted on the rotating shaft (30). The rotating shaft (30) is driven by a transmission track (23) to the rotating shaft (19). A second blade (27) is fixedly mounted on the rotating shaft (30). The positioning mechanism includes a fan-shaped perforated plate (22) fixedly mounted on the swing arm (20). A slot is provided on the cylinder body. The fan-shaped perforated plate (22) is fixedly engaged with the slot by a bolt. The second blade (27) is composed of a blade wheel (31) and multiple blades (32). Each blade (32) is slidably mounted on the blade wheel (31). An adjustment mechanism (33) is installed between the blade wheel (31) and the multiple blades (32). The adjustment mechanism (33) includes a first rubber ring (35) fixedly mounted on the swing arm (20). A fixed ring (34) is fixedly mounted on the blade wheel (31). Multiple lead screws (37) are rotatably mounted on the fixed ring (34). A second rubber ring (36) that fits against the first rubber ring (35) is fixedly mounted on each lead screw (37). A threaded sleeve (38) is rotatably mounted on each lead screw (37). Multiple connecting rods (39) are fixedly mounted on each threaded sleeve (38). A connecting block (40) is fixedly mounted on the corresponding multiple connecting rods (39). Each connecting block (40) is fixedly connected to the corresponding blade (32).

2. The folding life raft for underwater rescue according to claim 1, characterized in that, The blocking assembly (3) includes a housing (10) fixedly installed between the one-way tube (8) and the air duct (6). Multiple shafts are rotatably mounted on the housing (10). A sealing plate (11) is fixedly installed on each shaft, and a second gear (17) is fixedly installed on each shaft. A driving mechanism that cooperates with the multiple second gears (17) is installed on the housing (10).

3. The folding life raft for underwater rescue according to claim 2, characterized in that, The driving mechanism includes multiple internal gear rings (16) rotatably mounted inside the housing (10) and meshing with corresponding second gears (17), and a double-sided gear ring (18) rotatably mounted inside the housing (10) and meshing with one of the second gears (17). Adjacent internal gear rings (16) and internal gear rings (16) and double-sided gear rings (18) are connected by arc-shaped rods. A first gear (12) meshing with the outer teeth of the double-sided gear ring (18) is rotatably mounted on the housing (10). A rocker arm (15) is engaged on the first gear (12). A locking structure that cooperates with the first gear (12) is mounted on the housing (10).

4. The folding life raft for underwater rescue according to claim 3, characterized in that, The locking structure includes a fixed plate fixedly installed on the outer shell (10), a toothed plate (13) that meshes with the first gear (12) is slidably installed on the fixed plate, and two spring rods (14) are fixedly installed between the toothed plate (13) and the fixed plate.

5. The folding life raft for underwater rescue according to claim 4, characterized in that, The swing arm (20) is equipped with a tension control mechanism (26) to change the tension of the transmission track (23) and ensure that the transmission track (23) is in a taut state.

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