An underwater step-by-step inflation and step-by-step lifting salvage system and its salvage method

Abstract

The present invention belongs to the technical field of underwater salvage, and discloses an underwater step-by-step inflation and step-by-step lifting salvage system and a salvage method thereof. The system includes a salvage ship, a recovery device, a step-by-step lifting device, a fixing device, and buoyancy tubes. Among them, the recovery device is arranged on the salvage ship; one end of the step-by-step lifting device is fixedly connected to the recovery device, and the other end is fixedly connected to the fixing device; the buoyancy tubes are placed inside the salvage ship. It also includes an air compression device arranged in front of the recovery device. The structure of the present invention is simple, convenient for installation, disassembly and combination, easy to operate, and has strong practicability; moreover, the present invention realizes high-difficulty deep-water salvage through low-difficulty shallow-water inflation, the operation method is simple and easy to implement, effectively avoiding the technical difficulty of draining water and injecting gas in the deep water area while being easy to operate, ensuring the feasibility of deep-water objects and ultra-deep-water objects, and at the same time realizing the feasibility of salvaging large and ultra-large deep-water objects through the cooperation of equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater salvage, and particularly to an underwater step-by-step inflation and step-by-step lifting salvage system and a salvage method thereof. Background Art

[0002] Underwater salvage is an extremely difficult task. In the fields of disaster relief, fishery administration, fire fighting, military, and deep-sea exploration, salvage tools are often used. Salvage tools are mainly used for salvage operations in waters such as oceans, rivers, lakes, reservoirs, and fish ponds, and salvage underwater sunken ships or other sunken objects from the waters. When salvaging a sunken ship or sunken object, the method used more often is the pontoon salvage method. This method mainly involves towing several pontoons to the operation area of the sunken ship, sinking the pontoons to the bottom of the water, and then inflating the pontoons underwater, and using the buoyancy to lift the sunken ship to the water surface. For example, the patent with the publication number CN107176273A discloses a method for using a rubber pontoon for salvaging a sunken ship, which includes a rubber pontoon, a binding rope, and a hanging beam. The rubber pontoon cylinder is tied to the hanging beam through a hoisting rope, and the binding rope is tied to the rubber pontoon. There are multiple binding ropes. Before the rubber pontoon is lowered into the water, it is folded in half and tied with a binding rope, and then put into the water together with the hanging beam.

[0003] This patent can be used to install large rubber pontoons for salvage in a complex hydrological environment. Using a special pontoon installation hanging beam in cooperation with a pontoon hoisting rope and a pontoon binding rope to bundle and hoist the pontoons, so that the rubber pontoons are less affected by the water flow, which is convenient for the pontoons to be hoisted in place and for divers to install underwater. However, when using this patent, a crane is required, and at the same time, the staff needs to tie it many times. And when inflating the pontoons, divers need to operate and observe underwater for a long time, which leads to the problems of a complex overall system of this patent, numerous steps in the salvage process, and mainly relying on the operation of divers, with a relatively high difficulty. And during deep-sea salvage, due to the extremely high water pressure, it is difficult to inflate underwater.

[0004] Based on the above analysis, it can be seen that there are some defects in the existing underwater salvage systems and salvage methods, and there is still room for improvement and optimization. Therefore, it is urgent in this field to improve the existing underwater salvage systems and salvage methods, so as to solve the problems of a complex structure of the existing underwater salvage system, difficult inflation during deep-sea salvage, numerous salvage steps, and high dependence. Summary of the Invention

[0005] The purpose of the present invention is to provide an underwater step-by-step inflation and step-by-step lifting salvage system, which mainly solves the technical problems of difficult deep-sea salvage and complex structure of the underwater salvage system in the existing technology.

[0006] The technical solution adopted by the present invention to solve the technical problem is: an underwater step-by-step inflation and step-by-step lifting salvage system, comprising a salvage vessel, a recovery device, a step-by-step lifting device, a fixing device and a buoyancy tube, wherein the recovery device is arranged on the salvage vessel; one end of the step-by-step lifting device is fixedly connected to the recovery device, and the other end is fixedly connected to the fixing device; the buoyancy tube is placed in the salvage vessel;

[0007] The utility model also comprises a trumpet-shaped air compression device arranged in front of the recovery device, wherein the end of the trumpet-shaped air compression device with a smaller opening is close to the recovery reel, and the end of the trumpet-shaped air compression device with a larger opening is close to the salvaged object.

[0008] The salvage vessel of the present invention is a common salvage vessel in the prior art. Its primary function is to house the tools needed for salvaging and to accommodate personnel. The recovery device is detachably connected to the salvage vessel and is primarily used to secure and recover the step-by-step lifting device. The securing device secures the salvaged object and connects it to the recovery device on the salvage vessel. Once secured to the object, the shallow water area below the step-by-step lifting device is inflated, increasing buoyancy and lifting the object from the bottom of the water. The buoyancy tube is secured to the object as it approaches the water surface. The buoyancy tube is then inflated, and the inflated buoyancy tube, under the action of buoyancy, lifts the object upward, thus completing the salvage operation. The air compressor compresses the air within the step-by-step lifting device from the end closest to the recovery device to below the water surface, ensuring that sufficient air remains within the step-by-step lifting device below the water surface to maintain buoyancy after the step-by-step lifting device is gradually recovered.

[0009] Furthermore, the recovery device includes a driving motor and a recovery winding disk; the output end of the driving motor is fixedly connected to one surface of the recovery winding disk, and the other surface of the recovery winding disk is provided with a fixed shaft for fixing the step-by-step lifting device; the other end of the step-by-step lifting device passes through the air compression device and is fixedly connected to the fixing device.

[0010] Furthermore, the step-by-step lifting device is composed of two or more step-by-step lifting tubes that are detachably connected in series, and each step-by-step lifting tube is also provided with one or more load-bearing ropes.

[0011] Furthermore, the fixing device is a strap, a net, a buckle or a grip.

[0012] A salvage method for an underwater step-by-step inflation and lifting salvage system, specifically comprising the following steps:

[0013] Step S1, obtaining the shape, weight, position and underwater depth data of the salvaged object;

[0014] Step S2, placing one end of the step-by-step inflatable lifting device on a salvage vessel, and placing the other end underwater and fixing it to the salvaged object via a fixing device;

[0015] Step S3: Inflate one end of the step-by-step inflatable lifting device placed on the salvage ship, and stop inflating when the part of the step-by-step inflatable lifting device submerged below the water surface starts to emerge from the water.

[0016] Step S4: After stopping inflating, seal the port of one end of the step-by-step inflatable lifting device placed on the salvage ship, pass the step-by-step inflatable lifting device through the air compression device, and then fix it on the recovery device on the salvage ship.

[0017] Step S5: Start the recovery device to recover the step-by-step inflatable lifting device. At the same time, squeeze the gas at the end of the step-by-step inflatable lifting device close to the salvage ship below the water surface. At the same time, due to the function of the one-way valve, the gas can only flow unidirectionally towards the end of the salvaged object, prompting the further lifting of the salvaged item.

[0018] Step S6: When the salvaged object approaches the water surface, close the recovery device, then fix the non-inflated buoyancy tube on the salvaged object. After complete fixation, inflate the buoyancy tube.

[0019] Step S7: When the salvaged object floats on the water surface and reaches the condition for towing operation, perform the towing operation on the salvaged object to complete all the salvage operations.

[0020] Further, in Step S1, the data is obtained by an underwater robot.

[0021] Further, in Step S2, the fixing device is fixed on the salvaged object by a staff member diving or an underwater robot.

[0022] The working principle of the present invention to solve its technical problems is as follows: The overall salvage idea of the present invention is shallow water inflation → deep water lifting, step-by-step inflation → step-by-step lifting. The present invention is used on the basis that the salvaged object has been detected by existing detection technologies, and the fixing device can be fixed on the salvaged object by a robot. The main improvement points of the present invention are the realization of deep water lifting through shallow water inflation, the realization of step-by-step lifting through step-by-step inflation, as well as the overall structure and connection relationship of the system. During salvage, fix the fixing device at the end of the non-inflated step-by-step lifting device on the salvaged object, and then inflate the step-by-step lifting device close to the salvage ship end. After inflating to a certain extent, start the recovery device. The recovery device winds up the step-by-step lifting device. At the same time, due to the function of the one-way valve, the gas in the step-by-step lifting device is further compressed below the water surface. Under the buoyancy of the step-by-step lifting device after inflation, the salvaged object is dragged to break away from the bottom of the water. When the salvaged object is lifted to partially emerge from the water surface or the top approaches the water surface, fix the buoyancy tube at the bottom and around the salvaged object, and then inflate the buoyancy tube to make the salvaged object float on the water surface. After fixing the towing rope to the salvaged object, it can be towed.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. The present invention greatly reduces the technical difficulty of deep - water salvage, making deep - water salvage simple and easy to implement.

[0025] 2. The system structure of the present invention is simple, facilitating installation, disassembly and combination, easy to operate, and highly practical. Through the cooperation of various devices, the salvage of large and super - large objects can be achieved.

[0026] 3. When the recovery device of the present invention recovers the step - by - step lifting device, the gas in the step - by - step lifting device can be gradually compressed below the water surface, and through the method of adding gas step by step in the shallow water area, the salvaged target object can be lifted step by step.

[0027] 4. The operation method of the present invention is simple and easy to implement. While being easy to operate, it effectively avoids the technical difficulty of draining water and injecting gas in the deep - water area, ensuring the feasibility of salvaging deep - water objects, especially large objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will further illustrate the present invention in conjunction with the drawings and embodiments. The drawings in the following description are only partial embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts:

[0029] Figure 1 It is a schematic diagram of the overall structure of the system of the present invention.

[0030] Figure 2 It is a schematic diagram of a structure for cooperative salvage using two salvage ships.

[0031] Figure 3 It is a schematic diagram of a structure in which the buoyancy tube is fixed to the salvaged object.

[0032] Figure 4 It is a schematic diagram of a single step - by - step lifting device.

[0033] Figure 5 It is a schematic cross - sectional structure of the first connecting device.

[0034] Figure 6 It is a schematic diagram of the fixed tube in the embodiment.

[0035] Figure 7 It is a schematic diagram of the cooperation between the fixed tube and the first connecting device in the embodiment.

[0036] Figure 8 It is a schematic diagram of the cooperation between the air - compression device and the base.

[0037] Figure 9 is Figure 8 A sectional structure schematic diagram of the A-A plane in it.

[0038] Figure 10 It is a sectional schematic diagram of the cooperation between the wrapping ring and the step-by-step lifting pipe in the present invention.

[0039] Figure 11 It is a bottom view structure schematic diagram of the disk body in the present invention.

[0040] Figure 12 It is a structure schematic diagram of the first connecting device in the embodiment of the present invention.

[0041] In the figure: 1. Salvage ship; 2. Recovery device; 3. Step-by-step lifting device; 4. First connecting device; 5. Check valve; 6. Fixed pipe; 7. Protrusion; 8. First fixing hole; 9. Second fixing hole; 10. Fixing device; 11. Buoyancy pipe; 12. Air compression device; 13. Base; 14. Second connecting device; 15. Third connecting device; 16. Connecting hole; 17. Bolt; 18. Salvaged object; 19. Screw hole;

[0042] 201. Driving motor; 202. Recovery winding disk; 203. Fixed shaft;

[0043] 301. Step-by-step lifting pipe; 302. Load-bearing pulling rope;

[0044] 401. Connecting pipe; 402. Wrapping ring; 403. Limiting ring;

[0045] 4011. Cylinder; 4012. Disk body. Detailed implementation manners

[0046] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] As Figure 1 , Figure 2 , Figure 3 , Figure 8 and Figure 9 shown, an underwater step-by-step inflating and step-by-step lifting salvage system includes a salvage ship 1, a recovery device 2, a step-by-step lifting device 3, a fixing device 10 and a buoyancy pipe 11. Among them, the recovery device 2 is arranged on the salvage ship 1; one end of the step-by-step lifting device 3 is fixedly connected to the recovery device 2, and the other end is fixedly connected to the fixing device 10; the buoyancy pipe 11 is placed in the salvage ship 1;

[0048] The horn-shaped air compression device 12 is also included in the front of the recovery device 2 , and the end with a smaller opening of the horn-shaped air compression device 12 is close to the recovery reel 202 , and the end with a larger opening is close to the salvaged object 18 .

[0049] The salvage vessel 1 of the present invention is a common salvage vessel 1 in the prior art, and its main function is to place tools required for salvage and to carry personnel. The recovery device 2 is detachably connected to the salvage vessel 1 and is mainly used to fix and recover the step-by-step lifting device 3. The function of the fixing device 10 is to fix the salvaged object 18 and connect the salvaged object 18 to the recovery device 2 on the salvage vessel 1. After the fixing device 10 is fixed to the salvaged object 18, the shallow water area below the water surface of the step-by-step lifting device 3 is inflated to increase buoyancy, thereby causing the salvaged object 18 to break away from the bottom of the water and gradually rise. When the step-by-step lifting device 3 is recovered, the air above the water surface is further compressed below the water surface, prompting the salvaged object to be further lifted. The buoyancy tube 11 is used when the salvaged object 18 is pulled close to the water surface and the buoyancy of the step-by-step lifting tube is insufficient. The buoyancy tube 11 is then fixed to the salvaged object 18 and inflated. The inflated buoyancy tube 11 then pulls the salvaged object 18 upward under the buoyancy force, thereby achieving salvage. The air compressor 12 is used to squeeze the air in the step-by-step lifting device 3 from the end closest to the recovery device 2 to below the water surface, ensuring that as the step-by-step lifting device is gradually recovered, there is sufficient air in the step-by-step lifting device below the water surface to ensure buoyancy.

[0050] The buoyancy tube 11 of the present invention is essentially the same shape as the step-by-step lifting tube 301 assembly, differing in that it is movable and does not need to be connected to the salvage vessel 1 or the recovery device 2. When not in use, the buoyancy tube 11 is rolled up and placed on the salvage vessel 1. When the salvaged object 18 is lifted to a point where it is partially above the water surface or its top is close to the surface, the buoyancy tube 11 is secured to the bottom and sides of the object 18. The buoyancy tube 11 is then inflated to float the object 18 on the surface. A towing rope is then attached to the object 18, allowing it to be towed.

[0051] The trumpet-shaped air compressor 12 is positioned in front of the recovery reel 202, with the smaller opening of the trumpet-shaped air compressor 12 positioned adjacent to the recovery reel 202 and the larger opening positioned adjacent to the salvaged object 18. The step-by-step lifting device 3 extends through the bell-shaped opening of the trumpet-shaped air compressor 12, effectively encasing the step-by-step lifting device 3. The trumpet-shaped air compressor 12, through the tension of the recovery device 2 and the compression of the air compressor 12, combined with the action of a one-way valve, compresses the air in the recovered portion of the step-by-step lifting device 3, compressing it below the water surface and increasing buoyancy within the step-by-step lifting device 3. This gradually lifts the salvaged object 18 upward, ultimately retrieving it.

[0052] Further, if Figure 1 and Figure 2 As shown, the recovery device 2 includes a drive motor 201 and a recovery winding disk 202; the output end of the drive motor 201 is fixedly connected to one surface of the recovery winding disk 202, and the other surface of the recovery winding disk 202 is provided with a fixed shaft 203 for fixing the step-by-step lifting device 3; the other end of the step-by-step lifting device 3 passes through the air compression device 12 and is fixedly connected to the fixing device 10.

[0053] The drive motor 201 is a common drive motor 201 in the prior art. It rotates primarily when the step-by-step lifting device 3 is being recovered, thereby driving the recovery reel 202 connected to the drive motor 201 to rotate, further recovering the step-by-step lifting device 3 fixed to the recovery reel 202. The recovery reel 202 of the present invention is similar in shape to an existing I-shaped winding reel, and the fixed shaft 203 of the present invention is equivalent to the reel in an existing I-shaped winding reel, primarily serving a winding function. One end of the step-by-step lifting device 3 is fixed to the fixed shaft 203 of the recovery reel 202, and the other end passes through the air compressor 12 and is fixedly connected to the fixing device 10. This method ensures that the gas recovered and reeled by the step-by-step lifting device 3 is discharged into the step-by-step lifting pipe below the water surface.

[0054] Further, if Figure 1 、 Figure 2 and Figure 4 As shown, the step-by-step lifting device 3 is composed of two or more step-by-step lifting tubes 301 connected in series and detachably, and each step-by-step lifting tube 301 is further provided with one or more load-bearing ropes 302 inside.

[0055] The above method is convenient for increasing or decreasing the number of lifting pipes according to different depths, thereby controlling the overall length of the step-by-step lifting device 3. Each step-by-step lifting pipe 301 is also provided with one or more load-bearing ropes 302 to further improve the load-bearing capacity of the entire step-by-step lifting device 3.

[0056] like Figure 4 、 Figure 5, Figure 6 and Figure 7 As shown in Figure 4 and Figure 5 , in an embodiment of the present invention, a first connecting device 4 is provided at each end of each step-up lifting pipe 301; the first connecting devices 4 of the two step-up lifting pipes 301 are fixedly connected by a fixed pipe 6 with a check valve 5; one or more load-bearing ropes 302 are further provided inside each step-up lifting pipe 301, and both ends of the load-bearing rope 302 are fixedly connected to the first connecting devices 4 at both ends of the step-up lifting pipe 301. The check valve 5 in the present invention is an existing check valve 5, and the function of the check valve 5 is to ensure that the gas flows unidirectionally from the recovery device along the direction of the salvaged object 18, preventing the gas from flowing backward. Since the water pressure on the step-up lifting pipe 301 in water is relatively large, the check valve 5 is provided to effectively prevent the gas from flowing backward under the action of water pressure.

[0057] As Figure 4 and Figure 5 As shown in and

[0058] , in this embodiment, the first connecting device 4 includes a connecting pipe 401, a wrapping ring 402 and a limiting ring 403. Among them, the connecting pipe 401 is a hollow T-shaped column, the T-shaped column includes a column body 4011 and a disc body 4012 provided at one end of the column body 4011, and a circle of protrusions 7 are provided at the edge of the disc body 4012; the limiting ring 403 is in interference fit with the column body 4011; the wrapping ring 402 is provided between the limiting ring 403 and the disc body 4012, and the wrapping ring 402 is a circular ring, and the circular ring wraps around the step-up lifting pipe 301 on the outer circumference, and the circular ring wrapping the step-up lifting pipe 301 is stuck between the protrusion 7 and the column body 4011; one or more first fixing holes 8 are further provided on the column body 4011.

[0058] As Figure 6 and Figure 7 As shown in and

[0059] , in this embodiment, the fixed pipe 6 is a hollow cylindrical pipe, and one or more second fixing holes 9 matching the fixing holes are provided on the cylindrical pipe; the fixed pipe 6 is in clearance fit with the column body 4011 of the first connecting device 4 and is fixed by bolts 17 through the first fixing holes 8 and the second fixing holes 9, and the outer diameter of the column body 4011 is smaller than the inner diameter of the second column body 4011.

[0059] The step-up lifting pipe 301 in this embodiment is made of a flexible material with extensible performance on the surface, such as the material for making hot air balloons. In actual use, one end of the flexible step-up lifting pipe 301 passes through the wrapping ring 402 from the inside, and the edge of the step-up lifting pipe 301 turns outwards to the edge of the wrapping ring 402. At this time, the flexible step-up lifting pipe 301 can be sleeved outside a pipe with a smaller inner diameter than the inner diameter of the wrapping ring 402, and then the wrapping ring 402 rolls a certain distance along the direction of the other end of the step-up lifting pipe 301, that is, realizing the wrapping of the step-up lifting pipe 301 around the outer circumference of the wrapping ring 402. The cross-sectional view of the cooperation between the wrapping ring 402 and the step-up lifting pipe 301 is specifically as Figure 10As shown. It should be noted that when the outer periphery of the wrapping loop 402 wraps around the step-up pipe 301, the overall thickness of the wrapping loop 402 wrapped with the step-up pipe 301 is not greater than the gap between the protrusion 7 and the columnar body 4011, so as to be embedded in the gap. The wrapping loop 402 wrapped with the step-up pipe 301 is embedded in the gap between the protrusion 7 and the columnar body 4011, and then a limiting ring 403 is sleeved on the outer periphery of the columnar body 4011 to limit the wrapping loop 402. In this embodiment, the connection methods between the first connection devices 4 at both ends of the step-up pipe 301 and the step-up pipe 301 are exactly the same.

[0060] In this embodiment, the first fixing hole 8 is opened on the columnar body 4011, and the second fixing hole 9 is opened on the fixing pipe 6. During actual design, it should be ensured that the first fixing hole 8 and the second fixing hole 9 can be exposed after the columnar body 4011 and the fixing pipe 6 are in clearance fit, that is, the first fixing hole 8 is not blocked by the part of the fixing pipe 6 without an opening, and the second fixing hole 9 is not blocked by the part of the columnar body 4011 without an opening. After the positions of the first fixing hole 8 and the second fixing hole 9 correspond, the bolt 17 passes through the first fixing hole 8 and the second fixing hole 9 to fix the columnar body 4011 and the fixing pipe 6. At this time, the bolt 17 can also play a role in limiting the limiting ring 403 and the wrapping loop 402. In this embodiment, two sets of fixing holes are opened at both ends of the fixing pipe 6 to cooperate with the two first connection devices 4, so as to fixedly connect the two first connection devices 4.

[0061] As Figure 11 shown, in this embodiment, more than one connection hole 16 for passing through the load-bearing pull rope 302 is opened on the disc body 4012 of the first connection device 4. When the number of connection holes 16 is one, the two ends of the rope can be respectively passed through the connection hole 16 and then knotted and fixed. When the number of connection holes 16 is an even number, the two connection holes 16 on the disc body 4012 at one end of the step-up pipe 301 cooperate with the two connection holes 16 on the disc body 4012 at the other end, and the winding order of the rope is one hole on the disc body 4012 at one end, one hole on the disc body 4012 at the other end, another hole on the disc body 4012 at the other end, and another hole on the disc body 4012 at one end, and then the two ends of the rope are knotted. When the number of connection holes 16 is an odd number of more than three, a combination of the above two methods can be adopted. By placing the two load-bearing pull ropes 302 into the step-up device 3 in the above manner, the load-bearing capacity of the step-up device 3 can be improved, and the material of the load-bearing pull rope 302 is an existing metal or non-metal rope.

[0062] As shown in 4 and Figure 12As shown, in another embodiment of the invention, a first connecting device 4 is provided at each end of each step-up riser 301. The difference between the first connecting device 4 and the above embodiment is that in this embodiment, at least one of the two first connecting devices 4 at both ends of each step-up riser 301 has a built-in check valve. And the two first connecting devices 4 are directly connected without a fixed pipe being provided. Specifically, it is the same as the connection principle between two pipes in the prior art. For example, the connecting pipe 401 between the two first connecting devices 4 is connected by threads. The difference from conventional threads is that the threads are deeper to achieve the purposes of preventing water leakage, air leakage, and firm connection. In this embodiment, a screw hole 19 for installing screws is also provided on the connecting pipe 401. After the limiting ring 403 and the wrapping ring 402 are installed, the screws are then fitted with the screw holes 19, so as to clamp the limiting ring 403 and the wrapping ring 402 between the screws and the disc body 4012, thereby achieving the purpose of fixing the limiting ring 403 and the wrapping ring 402. The first connecting device 4 in this embodiment is basically the same as the previous embodiment, and the connection method of the two first connecting devices 4 is an existing connection method.

[0063] As Figure 1 , Figure 2 , Figure 8 and Figure 9 As shown, in an embodiment of the present invention, the air compression device 12 is placed on the salvage ship 1 through a base 13 fixed thereto. And an opening is provided on the side wall of the air compression device 12, and a second connecting device 14 is provided on the air compression device 12 on one side of the opening, and a third connecting device 15 matching the second connecting device 14 is provided on the air compression device by the opening on the other side.

[0064] Since the air compression device 12 of the present invention is in a horn shape and is not easy to fix when placed, therefore, the present invention also provides a base 13 at the bottom of the air compression device 12. The specific shape of the base 13 can be a bracket, a solid frustum or other structures. The purpose of providing an opening on the side wall of the air compression device 12 is to facilitate removal during inflation and installation during recovery. The cooperation of the second connecting device 14 and the third connecting device 15 can achieve the opening and closing of the opening. In the present invention, the second connecting device 14 is a lacing, a bolt 17, a buckle, a snap mechanism or a zipper; the third connecting device 15 is a lacing hole, a nut, a buckle fixing member, a snap fixing member or a zipper matching the second connecting device 14. Both the second connecting device 14 and the third connecting device 15 of the present invention are common existing devices, as long as the two sides of the opening of the air compression device 12 can be detachably connected.

[0065] Further, as Figure 1 and Figure 3As shown, the fixing device 10 is a strap, a net, a buckle or a gripper. The fixing device 10 of the present invention is mainly used to fix the salvaged object 18, and its shape can be replaced and adjusted according to the actual situation. For small objects, a mesh structure can be directly adopted. For structures with multiple frames, straps can be used for bundling and fixing, and buckles and grippers can also be used for fixing. The buckle in the present invention is similar to the climbing buckle used on a climbing rope. No matter which structure is adopted, as long as the fixing device 10 can fix the salvaged object 18. Since the above-mentioned equipment is an existing structure, the specific shape is not drawn in the present invention.

[0066] In the system of the present invention, when the salvaged object 18 is large in size or heavy in weight, more than two salvage ships 1 and supporting equipment can be used in cooperation to achieve rapid salvage. In an embodiment of the present invention, when salvaging a sunken ship, two salvage ships 1 and supporting equipment are used in cooperation for salvage, specifically as Figure 2 shown.

[0067] In the present invention, two special step-up pipes 301 can be provided, which are respectively the step-up pipes 301 at both ends of the entire step-up device 3 after connection. Specifically, in an embodiment of the present invention, one end of the step-up pipe 301 connected to the recovery device 2 is the first connection device 4, and the other end is the second connection device 14. Among them, the second connection device 14 of the step-up pipe 301 is fixed to the first connection device 4 of the next step-up pipe 301; the center of the first disk body 4012 in the first connection device 4 at the end of the step-up pipe 301 fixed to the recovery device 2 is a solid structure. And, a section extends out from the outer surface of the load-bearing rope on the first disk body 4012 so as to fix it on the fixed shaft 203.

[0068] In the present invention, one end of the step-up pipe 301 connected to the fixing device 10 is the first connection device 4, and the other end is the second connection device 14. Among them, the first connection device 4 of the step-up pipe 301 is fixed to the second connection device 14 of the previous step-up pipe 301; the center of the second disk body 4012 in the second connection device 14 at the end of the step-up pipe 301 fixed to the fixing connection device is a solid structure, and a fixing device 10 is fixedly connected to the second disk body 4012. In actual use, a semi-ring can be welded on the second disk body 4012, and the fixing device 10 is fixed to one end of a rope, and the other end of the rope is a buckle similar to a climbing buckle. This method is convenient for disassembling and replacing the fixing device 10, that is, replacing it according to the different shapes of the salvaged object 18, with good flexibility and strong practicability. An air inlet can also be provided on the step-up device 3 of the present invention, specifically, it can be provided on the surface of the step-up pipe 301 or on the first connection device, as long as inflation can be achieved. In actual use, the present invention can be inflated through an external inflation device.

[0069] In the system of the present invention, when the salvaged object 18 is relatively large in size or heavy in weight, more than two salvage ships 1 and supporting equipment can be used in cooperation to achieve rapid salvage. In an embodiment of the present invention, when salvaging a sunken ship, two salvage ships 1 and supporting equipment are used in cooperation for salvage, specifically as Figure 2 shown.

[0070] A salvage method for an underwater step-by-step inflation and step-by-step lifting salvage system specifically includes the following steps:

[0071] Step S1, obtaining the shape, weight, position and underwater depth data of the salvaged object 18;

[0072] Step S2, placing one end of the step-by-step inflation and lifting device on the salvage ship 1, and putting the other end underwater and fixing it on the salvaged object 18 through the fixing device 10;

[0073] Step S3, inflating the end of the step-by-step inflation and lifting device placed on the salvage ship 1, and stopping inflation when the part of the step-by-step inflation and lifting device submerged below the water surface begins to emerge;

[0074] Step S4, after stopping inflation, sealing the port of the end of the step-by-step inflation and lifting device placed on the salvage ship 1, passing the step-by-step inflation and lifting device through the air compression device 12, and then fixing it on the recovery device 2 on the salvage ship 1;

[0075] Step S5, starting the recovery device 2 to recover the step-by-step inflation and lifting device, while squeezing the gas at the end of the step-by-step inflation and lifting device close to the salvage ship 1 to the end close to the salvaged object 18. At the same time, due to the function of the one-way valve, the gas can only flow unidirectionally towards the end of the salvaged object, promoting the further lifting of the salvaged object 18;

[0076] Step S6, when the salvaged object 18 is close to the water surface, closing the recovery device 2, then fixing the non-inflated buoyancy tube 11 on the salvaged object 18, and after complete fixation, inflating the buoyancy tube 11;

[0077] Step S7, when the salvaged object 18 floats on the water surface and reaches the condition for implementing towing operations, implementing towing operations on the salvaged object 18 to complete all salvage operations.

[0078] Furthermore, in step S1, the data is obtained by relying on an underwater robot.

[0079] Furthermore, in step S2, the fixing device 10 is fixed on the salvaged object 18 by a staff member diving or an underwater robot.

[0080] In the present invention, after the object 18 to be salvaged is salvaged, the air in the stepwise lifting device 3 and the buoyancy tube 11 can be released through the air charging and discharging port, and then they can be stored. The operation method of the present invention is simple and easy to implement. While being simple to operate, it effectively avoids the technical difficulties of draining water and injecting air in deep water areas, ensuring the feasibility of salvaging deep-water objects, especially large objects.

[0081] The specific embodiments described above have further elaborated on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific implementation methods of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the gist of the present invention should be included within the protection scope of the present invention.

Claims

1. An underwater step-by-step inflation and lifting salvage system, characterized in that: The invention comprises a salvage vessel (1), a recovery device (2), a step-by-step lifting device (3), a fixing device (10) and a buoyancy tube (11), wherein the recovery device (2) is arranged on the salvage vessel (1); one end of the step-by-step lifting device (3) is fixedly connected to the recovery device (2), and the other end is fixedly connected to the fixing device (10); and the buoyancy tube (11) is placed in the salvage vessel (1); It also includes a trumpet-shaped air compression device (12) arranged in front of the recovery device (2), with the trumpet-shaped air compression device (12) having a smaller opening end close to the recovery winding reel (202) and a larger opening end close to the salvaged object (18); The step-by-step lifting device (3) is composed of two or more step-by-step lifting tubes (301) connected in series and detachably, and each step-by-step lifting tube (301) is further provided with one or more load-bearing ropes (302) inside. Each step-by-step lifting pipe (301) is provided with a first connecting device (4) at both ends; the first connecting devices (4) of the two step-by-step lifting pipes (301) are fixedly connected via a fixed pipe (6) with a one-way valve (5).

2. The underwater step-by-step inflation and lifting salvage system according to claim 1 is characterized in that: The recovery device (2) comprises a drive motor (201) and a recovery winding disk (202); the output end of the drive motor (201) is fixedly connected to one surface of the recovery winding disk (202); the other surface of the recovery winding disk (202) is provided with a fixed shaft (203) for fixing the step-by-step lifting device (3); the other end of the step-by-step lifting device (3) passes through the air compression device (12) and is fixedly connected to the fixing device (10).

3. The underwater step-by-step inflation and lifting salvage system according to claim 1 or 2, characterized in that: The fixing device (10) is a strap, a net, a buckle or a grip.

4. A salvage method based on the underwater step-by-step inflation and lifting salvage system according to any one of claims 1 to 3, characterized in that: The specific steps include: Step S1, obtaining the shape, weight, position and underwater depth data of the salvaged object (18); Step S2, placing one end of the step-by-step inflatable lifting device on the salvage vessel (1), and placing the other end underwater and fixing it to the salvaged object (18) through the fixing device (10); Step S3, inflating one end of the step-by-step inflatable lifting device placed on the salvage vessel (1), and stopping the inflation when the portion of the step-by-step inflatable lifting device that is submerged below the water surface begins to emerge from the water surface; Step S4, after stopping the inflation, the step-by-step inflation lifting device is placed on the port at one end of the salvage vessel (1) and sealed, and the step-by-step inflation lifting device is passed through the air compression device (12), and then fixed on the recovery device (2) on the salvage vessel (1); Step S5, starting the recovery device (2) to recover the step-by-step air-lifting device, and at the same time squeezing the gas at one end of the step-by-step air-lifting device close to the salvage vessel (1) to the end close to the salvaged object (18), thereby further lifting the salvaged object (18); Step S6, when the salvaged object (18) approaches the water surface, the recovery device (2) is closed, and then the uninflated buoyancy tube (11) is fixed to the salvaged object (18). After it is completely fixed, the buoyancy tube (11) is inflated; Step S7: When the salvaged object (18) floats on the water surface and reaches the conditions for towing operation, the salvaged object (18) is towed to complete the entire salvage operation.

5. The salvage method of the underwater step-by-step inflation and lifting salvage system according to claim 4, characterized in that: In step S1, data is acquired by an underwater robot.

6. The salvaging method of the underwater step-by-step inflation and step-by-step lifting salvaging system according to claim 4 or 5, wherein in step S2, a worker dives or an underwater robot fixes the fixing device (10) on the salvaged object (18).

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