An airdrop rescue device

Abstract

The present invention discloses an airdropped life-saving device, which includes: the upper raft body and the lower raft body are both folded and placed in a waterproof wrapping for being released; when the life-saving device is airdropped by an aircraft, the life-saving device can be deployed in the air, and after hitting the water, the raft body can be automatically deployed and inflated into shape; a connecting rope is connected to the upper raft body and the lower raft body, and the connecting rope connects the upper raft body and the lower raft body together; the raft body parts and the connecting parts are eye-catching in color and can emit light for position indication, and when floating on the water, they are easy to be discovered by the distressed people. After being airdropped and hitting the water in the upwind area of the distressed people, it can be linearly distributed on the sea surface, changing the traditional point-to-point rescue docking where the distressed people need to swim towards the life-saving device into a line-to-point rescue docking where the life-saving device covers the distressed people linearly, which is conducive to quickly achieving the rescue docking; with the action of the sea wind and waves, the rescue device can float towards the distressed people, effectively saving the physical strength of the distressed people in the rescue docking and greatly increasing the rescue success rate.

Description

Technical Field

[0001] The present invention relates to the technical field of aviation life-saving equipment, and more specifically, the present invention relates to an airdropped life-saving device. Background Art

[0002] After ships, submarines, transport aircraft, etc. are in distress at sea, a large number of crew members, sailors, aircraft passengers, etc. float on the sea surface waiting for rescue, and there is an urgent need for timely rescue. Airdrop rescue is one of the fast and effective rescue methods. Life-saving equipment such as life rafts and lifeboats are airdropped to the distressed sea area by transport aircraft, etc. for the distressed personnel to use for survival waiting for rescue until the rescue ship arrives.

[0003] The following deficiencies exist in the existing life-saving devices: When using traditional methods to airdrop life rafts, lifeboats, etc. at sea, it is often difficult to accurately drop them near the distressed personnel. The airdrop landing point may be far from the distressed personnel, and the distressed personnel need to spend a lot of effort to swim towards the life raft / boat. In poor sea conditions, they may even be unable to obtain the life raft / boat. The practical difficulties in point-to-point rescue docking lead to the ineffective exertion of the airdrop rescue efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide an airdropped life-saving device to solve the problems raised in the above background art. After the airdropped life-saving device falls into the water, it is linearly distributed at sea. By selecting an appropriate wind direction for airdrop, under the action of sea winds and waves, it drifts towards the distressed personnel. Compared with the dot distribution of the traditional airdropped life-saving device after falling into the water, it is easier for the distressed personnel to discover and capture, and can greatly improve the rescue efficiency. The specific technical solution is as follows:

[0005] An airdropped life-saving device, comprising:

[0006] A raft body member, which includes a waterproof wrapping member, an upper raft body and a lower raft body. The upper raft body and the lower raft body are both folded and placed in the waterproof wrapping member to be released.

[0007] A connecting member, which is arranged on the upper raft body and the lower raft body. It includes a connecting rope and a floating ball member. The connecting rope is connected to the upper raft body and the lower raft body. The floating ball member is arranged on the connecting rope to provide buoyancy for the connecting rope, and the connecting rope connects the upper raft body and the lower raft body into one body to conduct linear rescue for the distressed personnel.

[0008] Preferably, it further includes a parachute member, which is connected to the upper raft body and includes a parachute, and the parachute is connected to the upper raft body.

[0009] Preferably, the waterproof package includes a waterproof bag, an overload lock control device, and a device fixing strap. The waterproof bag is used to wrap the folded upper raft body and the lower raft body. The overload lock control device is arranged inside the waterproof bag. Both ends of the device fixing strap bind and press the upper raft body and the lower raft body and then connect to the overload lock control device.

[0010] Preferably, the upper raft body includes a raft body, a raft body fixing strap, a water-sensitive lock control device, and a high-pressure gas cylinder. The raft body is connected to the parachute ropes through a sea umbrella lock. After the raft body is folded, it is tied and fixed with the raft body fixing strap, and both ends of the tied raft body fixing strap are connected to the water-sensitive lock control device. The water-sensitive lock control device is arranged on the raft body. The high-pressure gas cylinder is arranged on the raft body and is controlled by the water-sensitive lock control device.

[0011] Preferably, the raft body is designed to be symmetric up and down, can be used in both directions, is orange as a whole and has reflective materials on the surface; a flashing position indicator light and a first seawater battery are arranged on the raft body; the flashing position indicator light and the first seawater battery are installed on both the upper and lower surfaces of the raft body so that they can function properly when the raft body is used on the front or back; connection ear buttons are provided on the raft body.

[0012] Preferably, the lower raft body has the same structure as the upper raft body, and the lower raft body and the upper raft body are respectively arranged at both ends of the connecting piece.

[0013] Preferably, the connecting rope includes a central rope body, a luminous light belt, and an outer surface layer. The central rope body is orange, and connection buckles are provided at both ends of the central rope body. The central rope body is respectively buckled to the connection ear buttons on the lower raft body and the upper raft body through the connection buckles at both ends; the luminous light belt is arranged along the central rope body and is powered by the floating ball member; the outer surface layer is transparent and wraps outside the luminous light belt and the central rope body.

[0014] Preferably, the floating ball member includes a floating ball, a foam filler, a second seawater battery, a flashing position marker light, and a seawater dye. The floating ball is arranged on the connecting rope, and the foam filler, the second seawater battery, the flashing position marker light, and the seawater dye are all arranged on the floating ball; the floating ball is a hollow transparent spherical shape, the surface of the floating ball is coated with fluorescent powder, the foam filler is orange, and the foam filler is filled inside the floating ball; the second seawater battery is arranged inside the floating ball and is arranged on one side close to the water inlet of the floating ball; the flashing position marker light is arranged inside the floating ball, and the flashing position marker light is electrically connected to the second seawater battery; the seawater dye is arranged inside the floating ball, and the seawater dye is located at the water inlet.

[0015] Preferably, the connecting rope passes through the floating ball, and the connecting rope is relatively fixed to the floating ball at both sides of the perforation of the floating ball through knots; a plurality of floating balls are arranged on the connecting rope.

[0016] Preferably, after the two ends of the connecting member are folded, they are respectively placed in the folded upper raft body and the lower raft body, and the two ends of the unfolded part of the connecting rope are respectively fixed on the water-sensitive locking device, and the fixing strength can withstand the overload caused by the falling of the fixing belt of the parachute opening device and the descent of the raft body. The connecting buckles at both ends of the connecting rope are respectively connected to the connecting ear buckles on the upper raft body and the lower raft body.

[0017] The present invention has at least the following beneficial effects:

[0018] 1) The airdropped rescue device of the present invention is provided with an upper raft body, a lower raft body and a connecting member. After the upper raft body, the lower raft body and the connecting member which are connected are airdropped and water-landed in the upwind area of the person in distress, they can be linearly distributed on the sea surface, changing the traditional point-to-point rescue docking where the person in distress needs to swim towards the rescue device into a line-to-point rescue docking where the rescue device covers the person in distress in a line shape, which is beneficial to quickly realizing the rescue docking; at the same time, with the action of sea surface wind and waves, the rescue device can float towards the person in distress, effectively saving the physical strength of the person in distress during the rescue docking and greatly increasing the rescue success rate;

[0019] 2) The airdropped rescue device of the present invention is folded, coiled and tied and fixed in a waterproof wrapping piece by folding the upper raft body, the lower raft body and the connecting member, which is convenient for placing and airdropping on an airplane; by setting a parachute member, an overload locking device, a water-sensitive locking device, a sea umbrella lock, etc., key steps such as slow descent, in-air deployment, water-landing shaping, and umbrella-raft separation of the rescue device can be realized, effectively ensuring the linear distribution of the rescue device after landing and water-landing.

[0020] Other advantages, objectives and features of the present invention will be partially reflected by the following description, and partially will be understood by those skilled in the art through the research and practice of the present invention. Description of the Drawings

[0021] Figure 1 It is a folding placement diagram of the rescue device of the airdropped rescue device of the present invention;

[0022] Figure 2 It is a schematic diagram of the connection relationship between the parachute member and the raft member in the airdropped rescue device of the present invention;

[0023] Figure 3 It is a schematic diagram of the raft body after inflation and shaping in the airdropped rescue device of the present invention;

[0024] Figure 4 It is a schematic diagram of the connection of the connecting member in the airdropped rescue device of the present invention;

[0025] Figure 5 Partial schematic view of the connecting buckle in the airdrop rescue device of the present invention;

[0026] Figure 6 Schematic diagram of the composition of the floating ball part in the airdrop rescue device of the present invention;

[0027] Figure 7 Longitudinal sectional view of the connecting rope in the airdrop rescue device of the present invention;

[0028] Figure 8 Transverse sectional view of the connecting rope in the airdrop rescue device of the present invention;

[0029] Figure 9 Schematic diagram of the in-air deployment of the airdrop rescue device of the present invention;

[0030] Figure 10 Schematic diagram of the linear distribution of the airdrop rescue device of the present invention on the water surface;

[0031] Figure 11 Rescue flow chart of the airdrop rescue device of the present invention;

[0032] Figure 12 Schematic diagram of the classification of the relative position situations during rescue in the airdrop rescue device of the present invention;

[0033] Figure 13 Schematic diagram of the rescue when point C is located within AB in the airdrop rescue device of the present invention.

[0034] Wherein: 1 - parachute, 2 - parachute pack, 3 - parachute pull ring, 4 - waterproof bag, 5 - overload lock control device, 6 - device fixing strap, 7 - raft body, 8 - raft body fixing strap, 9 - water-sensitive lock control device, 10 - high-pressure gas cylinder, 11 - sea parachute lock, 12 - flashing position indicator light, 13 - first seawater battery, 14 - connecting ear buckle, 15 - connecting rope, 16 - floating ball part, 17 - central rope body, 18 - light-emitting strip, 19 - outer surface layer, 20 - connecting buckle, 21 - floating ball, 22 - foam filler, 23 - second seawater battery, 24 - flashing position marking light, 25 - seawater dye, 26 - upper raft body, 27 - lower raft body, 28 - connecting piece, 29 - knot, 30 - water inlet. Detailed implementation manners

[0035] The technical solutions of the present invention will be described in detail below by way of embodiments with reference to the accompanying drawings. It should be noted here that the description of these embodiments is for helping to understand the present invention, but does not constitute a limitation to the present invention.

[0036] In this text, the term "and / or" is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, B exists alone, and both A and B exist simultaneously. In this text, the term " / and" describes another relationship between associated objects, indicating that there can be two relationships. For example, A / and B can represent: A exists alone, and both A and B exist alone. Additionally, in this text, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0037] According to Figures 1-13 As shown, an airdrop rescue device includes a parachute component, a raft component, and a connecting member 28. The raft component is disposed on the parachute component, and the connecting member 28 is disposed on the raft component. The parachute component includes a parachute 1, on which a parachute pull ring 3 is provided, and the parachute 1 is folded in a parachute pack 2. The parachute 1 is connected to the raft component through parachute ropes. The raft component includes a waterproof wrapping member, an upper raft 26, and a lower raft 27. The upper raft 26 is connected to the parachute 1, and the lower raft 27 is connected to the upper raft 26 through the connecting member 28, and both the upper raft 26 and the lower raft 27 are wrapped in the waterproof wrapping member. The waterproof wrapping member includes a waterproof bag 4, an overload lock control device 5, and a device fixing strap 6. The waterproof bag 4 is used to wrap the folded upper raft 26 and lower raft 27. The overload lock control device 5 is disposed on the waterproof bag 4, and the device fixing strap 6 binds and presses the upper raft 26 and the lower raft 27 and then connects them to the overload lock control device 5, so that after the overload lock control device 5 releases both ends of the device fixing strap 6, it is convenient for the upper raft 26 and the lower raft 27 to be released. Further, the waterproof bag 4 has waterproof and moisture-proof functions to prevent the components inside the upper raft 26 and the lower raft 27 from being damaged by moisture and affecting the use.

[0038] The upper raft 26 includes a raft body 7, a raft body fixing strap 8, a water-sensitive lock control device 9, and a high-pressure gas cylinder 10. The raft body 7 is connected to the parachute ropes through a sea parachute lock 11, so that when the raft body 7 enters the water, the sea parachute lock 11 acts, and the parachute 1 is separated from the raft body 7. The raft body 7 is folded and tied and fixed with the raft body fixing strap 8, and both ends of the tied raft body fixing strap 8 are connected to the water-sensitive lock control device 9, and the water-sensitive lock control device 9 is fixedly disposed on the raft body 7. The tied raft body 7 is loaded in the waterproof bag 4 to prevent the water-sensitive lock control device 9 from being damaged by moisture. The high-pressure gas cylinder 10 is disposed on the raft body 7. When the raft body 7 falls into the water, the switch of the water-sensitive lock control device 9 melts when it encounters water, and while releasing the raft body fixing strap 8, it opens the high-pressure gas cylinder 10, and then the folded raft body 7 is released and filled with gas to form a shape within 2 minutes.

[0039] Furthermore, the raft body 7 is designed with upper and lower symmetry and can be used in both directions. After unfolding, it is oval in shape, orange in color as a whole, and has a reflective material on its surface, making it easy to be discovered. A flashing position indicator light 12 and a first seawater battery 13 are arranged on the raft body 7, facilitating the discovery by the people in distress. The first seawater battery 13 is used to supply electrical energy to the flashing position indicator light 12. Specifically, the raft body 7 is made of double-layer waterproof nylon cloth, and the flashing position indicator light 12 and the first seawater battery 13 are installed on both the upper and lower surfaces of the raft body 7 so that they can function properly whether the front or the back of the raft body 7 is used. When the raft body 7 touches the water, the flashing position indicator light 12 can be automatically turned on and emit light through the first seawater battery 13, flashing at a frequency of 50 - 70 times per minute, and the working time is more than 12 hours, facilitating the observation and capture by the people in distress at night and in low visibility conditions; connection ear buckles 14 are provided on both sides of the raft body 7, facilitating the lashing with the connector 28; each raft body 7 can accommodate no less than 10 people, and when there are more people in distress, modular splicing can be carried out.

[0040] The lower raft body 27 has the same structure as the upper raft body 26, and the lower raft body 27 and the upper raft body 26 are respectively arranged at both ends of the connector 28.

[0041] The connector 28 includes a connecting rope 15 and a floating ball member 16. The connecting rope 15 is arranged on the upper raft body 26 and the lower raft body 27, and the floating ball member 16 is arranged on the connecting rope 15. The connecting rope 15 is integrally flexible and can be coiled, playing the role of connecting the upper raft body 26 and the lower raft body 27. The connecting rope 15 includes a central rope body 17, a light-emitting strip 18, and an outer surface layer 19. The central rope body 17 is made of nylon material, is orange in color, has a certain strength, and can withstand the opening overload of the parachute 1 during the airdrop of the life-saving device. Connecting buckles 20 are provided at both ends of the central rope body 17, and the central rope body 17 is respectively buckled on the connection ear buckles 14 on the lower raft body 27 and the upper raft body 26 through the connecting buckles 20 at both ends. The light-emitting strip 18 is composed of a plurality of light-emitting diodes, is uniformly arranged along the central rope body 17, and is powered by the second seawater battery 23 in the floating ball member 16. The outer surface layer 19 is made of a transparent wear-resistant material, and the outer surface layer 19 wraps the light-emitting strip 18 and the central rope body 17, mainly playing the role of protecting the light-emitting strip 18 and the central rope body 17.

[0042] The floating ball member 16 includes a floating ball 21, a foam filler 22, a second seawater battery 23, a flashing position lamp 24, and a seawater dye 25. The floating ball 21 is arranged on the connecting rope 15, and the foam filler 22, the second seawater battery 23, the flashing position lamp 24, and the seawater dye 25 are all arranged on the floating ball 21. The floating ball 21 is integrally a hollow transparent spherical shape with a hard plastic shell on the outside. The surface of the floating ball 21 is coated with fluorescent powder and appears as an orange fluorescent spherical shape when observed from the outside, which is easy to be discovered by the distressed personnel. The foam filler 22 is orange and is filled inside the floating ball 21. The second seawater battery 23 is arranged inside the floating ball 21, is arranged close to one side of the water inlet 30 of the floating ball 21, and is conformal with the outer surface of the floating ball 21. When the floating ball 21 touches the water, seawater enters from the water inlet 30 and can make the battery work. Specifically, since the second seawater battery 23 is arranged close to one side of the water inlet 30, the center of gravity of the floating ball 21 is biased towards the side of the second seawater battery 23, which can ensure that the water inlet 30 is buried in the water after the floating ball 21 falls into the seawater and make the second seawater battery 23 work. The flashing position lamp 24 is arranged inside the floating ball 21, and the flashing position lamp 24 is electrically connected to the second seawater battery 23. The flashing position lamp 24 is powered by the second seawater battery 23 and can flash at a frequency of 50 - 70 times per minute, with a working time of more than 12 hours, providing a positioning function during the rescue process, being easy to be discovered by the distressed personnel, and at the same time providing a position indication for the subsequent rescue personnel. The seawater dye 25 is arranged inside the floating ball 21, and the seawater dye 25 is located at the water inlet 30. After the floating ball 21 enters the water, the seawater dye 25 dissolves and diffuses, which can provide a position indication for the subsequent rescue personnel.

[0043] Specifically, the diameter of the floating ball 21 is 0.3 meters. The connecting rope 15 passes through the center of the floating ball 21, and the connecting rope 15 is relatively fixed to the floating ball 21 at both sides of the perforation of the floating ball 21 through a knot 29, so that the position of the floating ball 21 on the connecting rope 15 remains stable. The connecting rope 15 is 30 meters long, and 2 floating balls 21 are arranged in the middle (the length of the connecting rope 15 and the number of floating balls 21 can be adjusted according to the actual situation).

[0044] Both ends of the connecting member 28 are folded and respectively placed inside the folded upper raft body 26 and the lower raft body 27, and both ends of the unfolded part of the connecting rope 15 are respectively fixed on the water-sensitive lock control device 9, and its fixing strength can withstand the overload caused by the detachment of the fixing belt 6 of the parachute 1 opening device and the descent of the raft body 7. The connecting buckles 20 at both ends of the connecting rope 15 are respectively connected to the connecting ear buckles 14 on the upper raft body 26 and the lower raft body 27, and do not bear the overload tension during the descent process.

[0045] When the airdropped life-saving device is airdropped, it adopts the gravity airdrop method. The airdropped life-saving device is pushed and dropped on the airdrop slide rail of the aircraft. Under the action of gravity, the pull ring of the parachute 1 is pulled out, and the parachute 1 (on the upper raft body 26) is pulled out. Under the action of the opening dynamic load of the parachute 1, the overload lock control device 5 acts, and the device fixing belt 6 spreads out and falls off. The upper raft body 26, the lower raft body 27 and the connecting member 28 are stretched and unfolded (as Figure 9 shown), so that the lower raft body 27, the connecting member 28 and the upper raft body 26 touch the water surface slowly in sequence and are linearly distributed on the water surface (as Figure 10 shown).

[0046] After the raft body 7 enters the water, the sea parachute lock 11 acts, and the parachute 1 falls off; the water-sensitive lock control device 9 on the raft body 7 acts, and the raft body fixing belt 8 falls off. The high-pressure gas cylinder inflates the raft body 7, and the raft body 7 is formed and unfolded. The flashing position indicator lamp 12, the flashing marking lamp 24 and the luminous belt 18 start to emit light for position indication under the power supply of the seawater battery. The life-saving devices distributed linearly as a whole drift towards the sea distress personnel under the action of the sea wind and waves. The distress personnel can achieve successful rescue by capturing the connecting member 28 or the raft body 7.

[0047] When placed on the aircraft, the upper raft body 26, the lower raft body 27 and the connecting member 28 are all folded and placed in the waterproof wrapping. The two raft bodies 7 are respectively folded and placed above and below the connecting member 28. The connecting member 28 is coiled and placed between the two raft bodies 7. A parachute 1 is connected above the upper raft body 26; after the upper raft body 26, the lower raft body 27 and the connecting member 28 are folded, they are tied and fixed in the waterproof bag 4 by the device fixing belt 6, and the device fixing belt 6 is retracted into the upper overload lock control device 5; each raft body 7 is tied and fixed by the raft body fixing belt 8 after being folded, and the raft body fixing belt 8 is retracted into the water-sensitive lock control device 9, wherein the raft body fixing belt 8 of the upper raft body 26 is also connected and fixed to the parachute 1; both ends of the connecting rope 15 of the connecting member 28 are respectively retracted and fixed in the water-sensitive lock control device 9 of the raft body 7, and the connecting buckle 20 is lapped on the connecting ear buckle 14 of the upper raft body 26 and the lower raft body 27.

[0048] The working principle or usage process of the present invention is as described below:

[0049] After the aircraft carrying the airdropped life-saving device arrives at the rescue sea area in a folded and packaged state, it adjusts its course and altitude, removes the outer packaging of the airdropped life-saving device, and makes preparations for airdropping. It flies to the upwind area of the distressed personnel and conducts an airdrop at a suitable altitude and on a course basically perpendicular to the wind direction. The airdrop personnel select the right moment to push out the airdropped life-saving device located on the slide rail inside the aircraft. Under the action of gravity, the pull ring of parachute 1 tied to the pull rod inside the aircraft is pulled out, and parachute 1 opens. Under the action of the opening overload, the overload lock control device 5 operates, and the device fixing belt 6 spreads out and falls off. The raft body part and the connecting piece 28 are stretched and unfolded in the air, with the upper raft body 26, the connecting piece 28, and the lower raft body 27 from top to bottom in sequence. At the airdrop horizontal speed, the lower raft body 27, the connecting piece 28, and the upper raft body 26 touch the water in sequence. The water-sensitive lock control device 9 on the raft body 7 operates when encountering water, and the raft body fixing belt 8 spreads out and falls off. The raft body 7 automatically inflates and forms; at the same time, the first seawater battery 13 and the first seawater battery 13 work, causing the flashing position indicator light 12, the flashing marking light 24, the light-emitting strip 18, etc. to start flashing, providing an observation mark for the distressed personnel. The seawater dye 25 in the floating ball 21 dissolves and diffuses, providing a position indication for the subsequent rescue personnel. The upper raft body 26, the lower raft body 27, and the connecting piece 28 are linearly distributed on the sea surface. Under the action of the wind and waves, the upper raft body 26, the connecting piece 28, and the lower raft body 27 linearly drift towards the distressed personnel. The distressed personnel swim towards the life-saving device at the same time, and the rescue docking can be achieved relatively quickly. During the rescue docking, the distressed personnel only need to capture a certain point in the linear distribution of the upper raft body 26, the connecting piece 28, and the lower raft body 27, then they can obtain the raft body 7 by pulling the connecting rope 15, and then climb onto the upper raft body 26 and turn to survival waiting for rescue.

[0050] In addition, during actual rescue, if there are a large number of distressed personnel and the raft body 7 cannot carry all of them, a small number of distressed personnel can obtain temporary assistance by holding on to the connecting piece 28. At the same time, the flashing position indicator light 12, the flashing marking light 24, the light-emitting strip 18, the seawater dye 25, etc. can all continuously provide position indication for the subsequent rescue personnel, which can all improve the overall rescue ability to a certain extent.

[0051] Analysis of the improvement of rescue efficiency:

[0052] Compare and analyze two methods of using the present invention and traditional airdropped life rafts for rescue from two aspects: the rescue coverage area and the rescue time.

[0053] First, make the following settings:

[0054] (1) The distressed personnel are in a conscious and swimmable state, which is in line with the actual situation. During the rescue docking process, the distressed personnel can swim towards the raft body 7 or the connecting piece 28 at a certain speed to achieve rescue docking faster. During the docking process, the swimming speed of the distressed personnel and the floating speed of the airdropped life-saving device remain unchanged;

[0055] (2) If the person in distress comes into contact with the connecting device or the life raft, it is regarded as a successful rescue;

[0056] (3) The said airdropped life-saving device or traditional life raft can be airdropped into the upwind area of the person in distress, can be linearly deployed on the sea surface, and the distribution line is perpendicular to the wind direction;

[0057] (4) The linear length of the said airdropped life-saving device is denoted as L = 2a = 30 m, the center point is denoted as O, and the two raft bodies 7 are respectively denoted as raft body A and raft body B. When using a traditional life raft for rescue, they are two separate A and B life rafts.

[0058] The rescue scenario is as follows: After the rescue aircraft airdrops the life-saving device, it is linearly deployed in the upwind area of the person in distress (it becomes a traditional life raft after removing the connecting piece 28), drifts on the sea surface along the wind direction, and the person in distress swims towards the raft body or the connecting piece 28. For the sake of simplified analysis, the scenario of one person in distress is analyzed, and the same applies when there are multiple people in distress.

[0059] (1) Comparison of rescue coverage area

[0060] Let the maximum relative movement distance between the person in distress and the life-saving device be R. Since the person in distress can only capture the nearest life raft during traditional point-to-point docking, the area of the region where the person in distress can capture the life-saving device (rescue coverage area) is:

[0061] S1 = πR 2 (1)

[0062] The rescue coverage area of the person in distress when using the line-to-point docking of the present invention is:

[0063] S2 = πR 2 + 4aR (2)

[0064] When the maximum relative movement distance R is taken as 30 m and the length of the connecting device of the life-saving device 2a = 30 m (a = 15), the ratio of the rescue coverage areas of the person in distress by the two methods is:

[0065]

[0066] After adopting the present invention, the area of the region where the person in distress can capture the life-saving device increases by more than 60% compared with the traditional method.

[0067] (2) Comparison of rescue time

[0068] Such as Figure 12As shown in the figure, the position of the person in distress is denoted as P, and the foot of the perpendicular from P to the distribution line of the life-saving devices is denoted as C. There are three cases, namely I, II, and III, for the relative distribution positions of C and the life-saving devices AB, corresponding to two situations. One is that point C is located within the interval AB (case I), and the other is that point C is located outside the interval AB (cases II and III). Obviously, when the device of the present invention is in use, point C should be located within the interval AB to give full play to the rescue advantage.

[0069] As Figure 13 shown, when point C is located within the interval AB and the rescue device is the airdropped life-saving device of the present invention (Method 1), the person in distress only needs to swim vertically towards the connecting device. Under the action of wind and waves, the overall drifting speed of the life-saving device AB is denoted as V b , and the swimming speed of the person in distress is denoted as V P . Then the time T1 taken for a successful rescue docking is:

[0070]

[0071] where L PC is the distance from point P to point C.

[0072] When using a traditional controlled-drop life raft (Method 2), there is no connecting piece 28, and the person in distress can only swim towards life raft A or B nearby. As Figure 13 shown, the person in distress swims towards life raft B nearby, and their movement trajectory is an arc curve and finally contacts the life raft at point M to obtain a successful rescue. The time T2 taken for a successful rescue docking is:

[0073]

[0074] where, is the length of the arc PM, and L BM is the length of the line segment BM.

[0075] Comparing Equation (3) and Equation (4), according to Figure 13 , obviously there is Therefore, T1 < T2. Therefore, compared with the traditional rescue life raft, when using the airdropped life-saving device of the present invention for rescue, the rescue time will be effectively shortened, the person in distress will be able to better save physical strength, and the rescue efficiency can be effectively improved.

[0076] According to the analysis of the above (1) and (2) contents, when using the device of the present invention, compared with the traditional life raft, the rescue efficiency can be better improved. In addition, when using the airdropped life-saving device of the present invention for rescue, based on the basic feature that the two raft bodies are connected as a whole, the advantage of collective mutual assistance of the people in distress can be fully exerted during the rescue, which is beneficial to the improvement of the overall rescue efficiency.

[0077] When the life-saving device of the present invention is airdropped by an aircraft, the life-saving device can be deployed in the air. After hitting the water, the raft body can be automatically deployed and inflated into shape; the connecting ropes are connected to the upper raft body and the lower raft body, and the connecting ropes connect the upper raft body and the lower raft body together; the raft body parts and the connecting parts are brightly colored and can emit light for position indication, and when floating on the water, it is easy to be discovered by the distressed personnel. After being airdropped and hitting the water in the upwind area of the distressed personnel, it can be linearly distributed on the sea surface, changing the traditional point-to-point rescue docking where the distressed personnel need to swim towards the life-saving device into a line-to-point rescue docking where the life-saving device covers the distressed personnel linearly, which is conducive to quickly achieving the rescue docking; with the action of the sea wind and waves, the rescue device can float towards the distressed personnel, effectively saving the physical strength of the distressed personnel in the rescue docking and greatly increasing the rescue success rate.

[0078] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.

Claims

1. An airdrop rescue device, characterized in that, include: A raft body part, comprising a waterproof wrapping piece, an upper raft body and a lower raft body, wherein the upper raft body and the lower raft body are both folded and placed in the waterproof wrapping piece to be released; A connecting member, which is arranged on the upper raft body and the lower raft body, and comprises a connecting rope and a floating ball member, wherein the connecting rope is connected to the upper raft body and the lower raft body, the floating ball member is arranged on the connecting rope to provide buoyancy for the connecting rope, and the connecting rope connects the upper raft body and the lower raft body together to perform linear rescue for people in distress; It also includes a parachute component, which is connected to the upper raft body, and includes a parachute, and the parachute is connected to the upper raft body; the waterproof package component includes a waterproof bag, an overload lock control device and a device fixing belt, the waterproof bag is used to wrap the folded upper raft body and the lower raft body, the overload lock control device is arranged in the waterproof bag, and the two ends of the device fixing belt are connected to the overload lock control device after binding and pressing the upper raft body and the lower raft body; the upper raft body includes a raft body, a raft body fixing belt, a water-sensitive lock control device and a high-pressure gas bottle, the raft body is connected to the parachute rope of the parachute through a sea parachute lock, the raft body is tied and fixed with the raft body fixing belt after being folded, and the two ends of the tied raft body fixing belt are connected to the water-sensitive lock control device, the water-sensitive lock control device is arranged on the raft body, and the high-pressure gas bottle is arranged on the raft body and is controlled by the water-sensitive lock control device; When placed on the aircraft, the upper raft body, the lower raft body and the connecting member are all folded and placed in the waterproof wrapping member, and the two raft bodies are folded and placed at the upper and lower parts of the connecting member respectively, and the connecting member is coiled and placed between the two raft bodies, and the parachute member is connected to the upper part of the upper raft body; after the upper raft body, the lower raft body and the connecting member are folded, they are tied and fixed in the waterproof bag by the device fixing belt, and the device fixing belt is gathered in the overload lock control device above; after the raft body enters the water, the sea parachute lock is activated, and the parachute falls off; the water-sensitive lock control device on the raft body is activated, the raft body fixing belt falls off, the high-pressure inflation bottle inflates the raft body, and the raft body is formed and unfolded; the lower raft body has the same structure as the upper raft body, and the lower raft body and the upper raft body are respectively arranged at the two ends of the connecting member.

2. The airdrop rescue device according to claim 1, wherein, The raft body is designed to be symmetrical up and down, can be used from the front and back, is orange in color and has reflective material on the surface; flashing position indicating lights and a first seawater battery are arranged on the raft body; the flashing position indicating lights and the first seawater battery are installed on the upper and lower sides of the raft body, so that the raft body can function normally when used from the front or back; the raft body is provided with connecting ear buckles.

3. The airdrop rescue device according to claim 2, wherein, The connecting rope includes a central rope body, a luminous light strip and an outer layer. The central rope body is orange. Both ends of the central rope body are provided with connecting buckles. The central rope body is respectively buckled on the connecting ear buckles on the lower raft body and the upper raft body through the connecting buckles at both ends; the luminous light strip is arranged along the central rope body and is powered by the float; the outer layer is transparent, and the outer layer is wrapped around the outside of the luminous light strip and the central rope body.

4. The airdrop rescue device according to claim 3, characterized in that, The floating ball member includes a floating ball, a foam filler, a second seawater battery, a flashing position lamp, and a seawater dye. The floating ball is arranged on the connecting rope, and the foam filler, the second seawater battery, the flashing position lamp, and the seawater dye are all arranged on the floating ball; the floating ball is in the shape of a hollow transparent sphere, the surface of the floating ball is coated with fluorescent powder, the foam filler is orange, and the foam filler is filled in the floating ball; the second seawater battery is arranged inside the floating ball and is arranged on one side close to the water inlet of the floating ball; the flashing position lamp is arranged inside the floating ball, and the flashing position lamp is electrically connected to the second seawater battery; the seawater dye is arranged inside the floating ball and is located at the water inlet.

5. The airdrop rescue device according to claim 4, characterized in that, The connecting rope passes through the floating ball, and the connecting rope is relatively fixed to the floating ball at both sides of the perforation of the floating ball through knots; a plurality of floating balls are arranged on the connecting rope.

6. The airdrop rescue device according to claim 5, wherein, Both ends of the connecting member are folded and respectively placed in the folded upper raft body and the lower raft body, and both ends of the unfolded part of the connecting rope are respectively fixed on the water-sensitive locking device, and the fixing strength can withstand the overload caused by the fall of the fixing belt of the parachute opening device and the descent of the raft body. The connecting buckles at both ends of the connecting rope are respectively connected to the connecting ear buckles on the upper raft body and the lower raft body.

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