Lifting systems for extracting seawater

Abstract

The present invention provides a lifting system for extracting seawater, including a water intake buffer cabin with a water intake buffer cavity, a water intake main pipe, and a seawater lifting pump installed in a pump cabin, wherein the water intake buffer cavity is located below the sea level, the lower end of the water intake main pipe is used to extend into the seawater, the upper end of the water intake main pipe is connected to the water intake buffer cavity, and the pump inlet of the seawater lifting pump is connected to the water intake buffer cavity. The work done by the seawater lifting pump only needs to lift the seawater in the water intake buffer cabin to the user at a set height, thereby reducing energy consumption, and the seawater lifting pump is installed in the pump cabin, so that the seawater lifting pump can use an in-cabin pump without using an underwater pump, thereby reducing the purchase cost of the seawater lifting pump, and the in-cabin pump is more convenient to maintain than the underwater pump, has a lower maintenance cost, and has a longer service life; the seawater lifting system can be adapted to use under higher sea conditions, can achieve large flow and large depth lifting of seawater, and can be deployed and recovered, with high flexibility.

Description

Technical Field

[0001] The invention relates to the field of ship and marine engineering technology, and in particular to a lifting system for extracting seawater. Background Art

[0002] The existing seawater lifting systems mainly include three types: hose winch type, independent installation tower type and pile leg installation tower type.

[0003] like Figure 1 As shown in the figure, the lifting system of the hose winch type seawater lifting device is mainly composed of a winch 61, a hose 62, a cable 63, and a control box 64. The system uses a specially designed high-strength hose as a water pipe, a submersible pump 65 is installed at the lower end, and the upper end is fixed on the winch 61, and the power supply and signal cables are accompanied by the hose. The purpose of retracting and releasing the hose and the cable is achieved by retracting and releasing the submersible pump 65 through the winch of the winch 61, so that the submersible pump 65 is in a suitable position, which is convenient for pumping seawater to meet the needs of the platform.

[0004] The main disadvantages of hose winch type seawater lifting device are:

[0005] 1. Limited by the length of the hose, the water intake depth is shallow, generally not more than 20m;

[0006] 2. In severe sea conditions, the pump is prone to drift, which is highly destructive to the hose and causes instability in the water intake depth;

[0007] 3. Regardless of the actual water intake depth, the seawater must pass through the entire length of the pipeline and the rotating joint above the main deck. The friction resistance of the pipeline and the height difference of the seawater lifting are large, resulting in high working energy consumption;

[0008] 4. A high-power submersible pump and matching underwater cables are required. The pump is expensive and inconvenient to maintain;

[0009] 5. The submersible pump is suspended in the sea by a hose, and the environmental load has a greater impact on the pump and hose;

[0010] 6. The hose has low strength and short service life. If the hose fails and the pump falls to the bottom of the sea and is difficult to recover, it will cause great economic losses.

[0011] like Figures 2 to 5As shown, the independently installed tower seawater lifting device is a small truss-type independent lifting system, which is mainly composed of a cylinder 71, a tower 72, a support seat 73, a water pipe 74, a gear rack lifting device 75, etc. This system requires an additional through hole to be opened on the platform body 76 to install the seawater lifting tower. In order to lift the seawater lifting tower, a gear rack lifting device is generally required. The water pipe is part of the tower, and the submersible pump 77 and the gear rack lifting device 75 are both fixed on the tower 72. The tower is installed on the cylinder through the support seat, and the cylinder is connected to the platform body. The gear rack lifting device is installed at a position above the platform deck, and the submersible pump is installed at the lower end of the tower. The lifting device lifts the pump tower through the through hole of the platform body, so that the submersible pump is lowered to a suitable position to meet the work requirements. When the seawater lifting tower is raised to the predetermined position, it is locked with the auxiliary ratchet of the lifting device. The top of the seawater lifting tower is the seawater outlet, which is connected to the deck fixed pipeline through a hose. A junction box needs to be installed on the top of the seawater lifting tower to connect with the deck power cable. The cable needs to be equipped with a drum winch to synchronize the lifting and lowering of the seawater lifting tower to retract and release the cable. In addition, the seawater lifting tower needs to be approved by the classification society, so it is generally necessary to find a qualified manufacturer to order it. It needs to be specially designed according to the design environmental load of the platform, and the delivery cycle is relatively long.

[0012] The main disadvantages of independently installed tower seawater lifting devices are:

[0013] 1. The height of the seawater lifting pump tower should not be too high, and the rack stroke is limited, which limits the water intake depth, generally within 20m;

[0014] 2. The structure is relatively complex, heavy, occupies a large deck area and has high requirements for structural design;

[0015] 3. Regardless of the actual water intake depth, the seawater must pass through the entire length of the lifting tower water pipeline and the hose, and must pass through the lifting tower and the top of the hose above the main deck. The pipeline friction resistance and the seawater lifting height difference are large, resulting in high working energy consumption;

[0016] 4. The seawater outlet of the pump tower is at the top and is connected to the main pipeline of the platform with a hose. During the lifting process, the hose needs to be manually retracted and released, which increases manpower input and reduces work efficiency.

[0017] 5. The submersible pump and underwater cable installed in the pump tower are expensive, and the submersible pump is difficult to disassemble, making it inconvenient for maintenance.

[0018] like Figures 6 to 8As shown, the pile leg mounted tower type seawater lifting device is composed of a seawater pipe 81 (with a submersible pump and a motor installed at the bottom), two pile driving pipes 82, a guide chute 83, a slide rail 84 and a locking device. The seawater pipe is installed between the two pile driving pipes, and guide chutes are arranged at intervals on the top. The pile driving pipe is fixed on the pile leg, and guide rails are welded on it and connected to each other. Some outlets must be arranged at a certain distance on the seawater pipe to adapt to different working water depths. The lifting of the seawater lifting tower is carried out by using the guide chute on the seawater pipe, the slide rail on the pile driving pipe and the deck crane to lift the seawater lifting tower to adapt to different working water depths. When the seawater lifting tower is lifted to the working position, the seawater lifting tower is connected to the stop plate on the deck with bolts to lock the seawater lifting tower. The cable also needs to be equipped with a drum winch to retract and release the cable synchronously with the lifting of the seawater lifting tower.

[0019] The main disadvantages of the pile-leg mounted tower seawater lifting device are roughly the same as those of the independent tower mounted seawater lifting device. The difference is that the seawater pipe outlet of the pile-leg mounted seawater lifting device is connected to the deck fixed pipeline with a hose, and the hose needs to be disassembled and installed during lifting, so the lifting speed is slow; this system is a seawater pipe plus some simple sliding devices, so it is low in cost, does not occupy deck area and is light in weight. Summary of the invention

[0020] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a lifting system for extracting seawater with lower energy consumption.

[0021] To achieve the above-mentioned purpose, the present invention provides a lifting system for extracting seawater, comprising a water intake buffer cabin having a water intake buffer chamber, a water intake main pipe and a seawater lifting pump installed in the pump cabin, wherein the water intake buffer chamber is located below the sea level, the lower end of the water intake main pipe is used to extend into the seawater, the upper end of the water intake main pipe is connected to the water intake buffer chamber, and the pump inlet of the seawater lifting pump is connected to the water intake buffer chamber.

[0022] Furthermore, the water intake main pipe includes an underwater pipe extending into the seawater, an in-cabin water-permeable pipe located in the water intake buffer chamber, and a hanging load-bearing unit installed in the cabin opening of the water intake buffer cabin, and the upper and lower ends of the hanging load-bearing unit are respectively connected to the in-cabin water-permeable pipe and the underwater pipe.

[0023] Furthermore, the upper end of the underwater pipe is connected to the lower end of the suspension load-bearing unit through a flexible unit.

[0024] Furthermore, the water intake main pipe includes an underwater pipe extending into the seawater, and a curved pipe slider installed at the cabin opening on the outer side wall of the water intake buffer cabin, and the underwater pipe is connected to the water intake buffer chamber through the curved pipe slider and the cabin opening.

[0025] Furthermore, the underwater pipe is connected to a lifting wire rope, and the other end of the lifting wire rope is connected to a hanger installed on the top of the water intake buffer tank.

[0026] Furthermore, a slide groove extending in the up and down direction is provided on the outer side wall of the water intake buffer cabin, the bent pipe slider cooperates with the slide groove, the upper end of the slide groove extends to the top of the water intake buffer cabin, and the lower end of the slide groove extends to the opening of the cabin body.

[0027] Furthermore, a flexible unit is installed between the pipe bending slider and the underwater pipe, and the underwater pipe is connected to the pipe bending slider through the flexible unit.

[0028] Furthermore, the underwater pipe comprises a plurality of sections of underwater segmented pipes sequentially distributed along the length direction of the underwater pipe, and two adjacent sections of the underwater segmented pipes are fixedly connected.

[0029] Furthermore, the underwater segmented pipes are steel risers, and a storage rack is provided on the top of the water intake buffer tank, and the storage rack is used to store the steel risers.

[0030] Furthermore, the underwater segmented pipe adopts a hose, and a hose reel is provided on the top of the water intake buffer cabin, and the hose reel is used to reel up the underwater pipe.

[0031] As described above, the lifting system for extracting seawater according to the present invention has the following beneficial effects:

[0032] The water intake buffer chamber is below sea level. Under the action of seawater pressure, seawater will automatically flow into the water intake buffer chamber through the water intake main pipe, and then the seawater lifting pump installed in the pump cabin will be used to lift the seawater in the water intake buffer chamber directly to the set height for supply to users. The work done by the seawater lifting pump is only needed to lift the seawater in the water intake buffer cabin to the users at the set height. In this way, the seawater lifting pump does not need to be immersed in seawater and lifts the seawater to a position higher than the top of the cabin and higher than the users, which reduces energy consumption. The seawater lifting pump is installed in the pump cabin, so that the seawater lifting pump can use an in-cabin pump instead of an underwater pump, which reduces the purchase cost of the seawater lifting pump. In-cabin pumps are more convenient to maintain than underwater pumps, have lower maintenance costs, and have a longer service life, thereby making the cost of this lifting system lower, convenient to maintain, and have a longer service life. Compared with the prior art, the design type allows the use of water intake pipes with larger diameters and longer lengths, thereby achieving a larger water intake flow rate and a deeper water intake depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of a hose winch type seawater lifting device in the prior art.

[0034] Figure 2 The diagram is a schematic diagram of an installation of an independently installed tower-type seawater lifting device in the prior art.

[0035] Figure 3 It is a structural schematic diagram of an independently installed tower-type seawater lifting device in the prior art.

[0036] Figure 4 It is a structural schematic diagram of an independently installed tower-type seawater lifting device in the towing state in the prior art.

[0037] Figure 5 It is a structural schematic diagram of an independently installed tower-type seawater lifting device in the prior art in a standing state.

[0038] Figure 6 The present invention is a schematic diagram of the installation of a tower-type seawater lifting device on pile legs in the prior art.

[0039] Figure 7 It is a top view schematic diagram of a tower-type seawater lifting device installed on pile legs in the prior art.

[0040] Figure 8 The present invention is a schematic diagram of the structure of a tower-type seawater lifting device installed on pile legs in the prior art.

[0041] Fig. 9 It is a schematic diagram of the structure of the lifting system for extracting seawater in the first embodiment of the present invention.

[0042] Fig.10 It is a schematic diagram of the structure of the lifting system for extracting seawater in the second embodiment of the present invention.

[0043] Fig.11 It is a schematic diagram of the structure of the lifting system for extracting seawater in the third embodiment of the present invention.

[0044] Fig.12 It is a schematic structural diagram of the lifting system for extracting seawater in the fourth embodiment of the present invention in the recovered state.

[0045] Fig.13 It is a schematic structural diagram of the lifting system for extracting seawater in the fourth embodiment of the present invention after being deployed.

[0046] Fig.14 It is a schematic structural diagram of the lifting system for extracting seawater in the fifth embodiment of the present invention in the recovered state.

[0047] Fig.15 It is a schematic structural diagram of the lifting system for extracting seawater in the fifth embodiment of the present invention after being deployed.

[0048] Fig.16 It is a schematic diagram of the structure of the lifting system for extracting seawater in the sixth embodiment of the present invention after being deployed.

[0049] Fig.17It is a schematic structural diagram of the lifting system for extracting seawater in the sixth embodiment of the present invention in the recovered state.

[0050] Component number description

[0051] 1 Water intake buffer tank 44 Hose reel

[0052] 11 Chute 441 Pipe Winder

[0053] 12 Chuck and connecting device 45 Double track gantry car

[0054] 13 Main deck 46 elbow hanger

[0055] 2 Water intake main 461 Slider wire rope

[0056] 21 Underwater pipe 462 two-part lifting ring

[0057] 211 Underwater Segmented Pipe 5 Gantry Crane

[0058] 22 Cabin water pipe 61 Winch

[0059] 23 Suspension load-bearing unit 62 Hose

[0060] 24 Flexible unit 63 Cable

[0061] 25 elbow slider 64 control box

[0062] 26 Top fixed pipe 65 Submersible pump

[0063] 27 Sealing unit 71 Cylinder

[0064] 28 Enclosed Unit 72 Tower

[0065] 29 Water inlet filter 73 Support seat

[0066] 3 Pump room 74 Water pipe

[0067] 31 Seawater lifting pump 75 Gear rack lifting device

[0068] 32 Pump suction pipe 76 Platform body

[0069] 33 Pump suction gate valve 77 Submersible pump

[0070] 41 Lifting wire rope 81 Seawater pipe

[0071] 42 hanger 82 pile punching pipe

[0072] 421 First hanger 83 guide chute

[0073] 422 Second hanger 84 slide rail

[0074] 43 Storage rack DETAILED DESCRIPTION

[0075] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0076] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0077] Embodiment 1

[0078] like Fig. 9 As shown, this embodiment provides a lifting system for extracting seawater, including a water intake buffer cabin 1 with a water intake buffer chamber, a water intake main pipe 2 and a seawater lifting pump 31 installed in a pump cabin 3, the water intake buffer chamber is located below the sea level, the lower end of the water intake main pipe 2 is used to extend into the seawater, the upper end of the water intake main pipe 2 is connected to the water intake buffer chamber, and the pump inlet of the seawater lifting pump 31 is connected to the water intake buffer chamber. The working principle of the lifting system for extracting seawater is as follows: under the action of seawater pressure, seawater will automatically flow into the water intake buffer chamber through the water intake main pipe 2, and then the seawater lifting pump 31 installed in the pump cabin 3 will be used to directly lift the seawater in the water intake buffer chamber to a set height for supply to users. The work done by the seawater lifting pump 31 is only needed to lift the seawater in the water intake buffer cabin 1 to the user at the set height. In this way, the seawater lifting pump 31 does not need to be immersed in seawater and lifts the seawater to a position higher than the top of the cabin and higher than the user, which reduces energy consumption. The seawater lifting pump 31 is installed in the pump cabin 3, so that the seawater lifting pump 31 can use an in-cabin pump instead of an underwater pump, which reduces the procurement cost of the seawater lifting pump 31. In addition, the in-cabin pump is more convenient to maintain than the underwater pump, has lower maintenance cost, and has a longer service life, thereby making the cost of the lifting system lower, convenient to maintain, and having a longer service life.

[0079] In this embodiment, the lifting system can be used to extract deep seawater. Fig. 9As shown, the lifting system is an inboard multi-section straight pipe seawater lifting system, including a storage rack 43, a double-track truss car 45, a top fixed pipe 26, a water-permeable pipe 22 in the cabin, a sealing unit 27, a suspension load-bearing unit 23, a closing unit 28, a flexible unit 24, an underwater segmented pipe 211, a water inlet filter 29, a chuck and a connecting device 12, a water intake buffer cabin 1, a pump suction pipe 32 located in the pump cabin 3, a pump suction gate valve 33, a seawater lifting pump 31 and a pump outlet pipe. The underwater segmented pipe 211 has multiple sections, and is distributed in sequence along the vertical pipeline. Two adjacent sections of the underwater segmented pipe 211 are fixedly connected to form an underwater pipe 21 extending into the seawater. The upper end of the underwater pipe 21 is connected to the lower end of the suspension load-bearing unit 23 through the flexible unit 24. The upper end of the suspension load-bearing unit 23 is connected to the water-permeable pipe 22 in the cabin. The suspension load-bearing unit 23 is installed in the cabin opening of the water intake buffer cabin 1. The water-permeable pipe 22 in the cabin is located in the water intake buffer cavity. All underwater segmented pipes 211 located on the vertical pipeline and the upper and lower ends of each unit are provided with joints that can be repeatedly connected and disconnected. The lower end of the top fixed pipe 26 and the upper end of the water inlet filter 29 are provided with joints that can be repeatedly connected and disconnected. The upper end of the top fixed pipe 26 is provided with a flange that can be connected to the hull structure for top installation and fixation. The lower end of the top fixed pipe 26 is fixedly connected to the upper end of the water-permeable pipe 22 in the cabin. The top fixed pipe 26, the water-permeable pipe 22 in the cabin, the suspension load-bearing unit 23, the flexible unit 24, and the underwater pipe 21 constitute the water intake main pipe 2. The suspension load-bearing unit 23 and the flexible unit 24 have seawater channels with the same inner diameter as the underwater segmented pipe 211. The water inlet filter 29 is installed at the lower end of the underwater pipe 21, and many small holes are opened on the pipe wall of the water inlet filter 29 to prevent debris in the seawater from entering the pipeline. There are many small holes on the pipe wall of the water-permeable pipe 22 in the cabin, so that the seawater in the pipe can enter the water intake buffer cabin 1 and transmit the force at the same time. The top and bottom of the water intake buffer cabin 1 are provided with openings for each pipe segment and unit to pass through, and the opening at the bottom constitutes the cabin opening. The main deck 13 directly above the top opening of the water intake buffer cabin 1 is provided with a deck opening, and the chuck and connecting device 12 are installed on the deck opening. The outer surfaces of all components that need to constitute the water intake main pipe 2 are continuous and smooth, without protrusions, so that they can move smoothly through each opening. In addition, in this embodiment, the underwater segmented pipe 211 adopts a steel riser, and the top of the water intake buffer cabin 1 is provided with a storage rack 43, and the storage rack 43 is used to store the steel riser.

[0080] In this embodiment, the lifting system for extracting seawater has three working conditions: deployment, operation and recovery.

[0081] Before deployment, all underwater segmented pipes 211, water inlet filters 29, flexible units 24, and suspension load-bearing units 23 are stored in the storage rack 43. As shown in the figure, a closed unit 28 with the same size is installed at the position of the suspension load-bearing unit 23, and the closed unit 28 is followed by the cabin permeable pipe 22 and the top fixed pipe 26, so that the closed unit 28 is pressed against the cabin opening at the bottom of the water intake buffer cabin 1 to achieve watertightness between the water intake buffer cabin 1 and the seawater outside the ship. The remaining seawater in the water intake buffer cabin 1 can be emptied through the bilge water suction port (not shown in the figure).

[0082] When laying, first remove the connecting bolts between the top fixed pipe 26 and the hull seat plate, gradually lift the vertical pipeline in the water intake buffer tank 1 to above the main deck 13, disconnect each joint in turn by the chuck and connecting device 12, remove the top fixed pipe 26, the water-permeable pipe 22 in the cabin and the closed unit 28 in order, lift them by the double-track gantry vehicle 45 and place them in the predetermined position in the storage rack 43, and fix them by the tooling. Then, the double-track gantry vehicle 45 lifts the water inlet filter 29, several underwater segmented pipes 211 determined according to the water intake depth requirements, the flexible unit 24, the hanging load-bearing unit 23, the water-permeable pipe 22 in the cabin and the top fixed pipe 26 in order, and enters the water intake buffer tank 1 through the chuck and connecting device 12, the deck opening, and the top opening of the water intake buffer tank 1 in turn, and descends from the cabin opening at the bottom of the water intake buffer tank 1 under the bottom plate of the ship. When each component passes through the chuck and connecting device 12, the chuck clamps the current component and bears the gravity of the current and all components below. The double-track gantry vehicle 45 lifts the next component and moves it to the top of the current component. After the auxiliary machinery aligns the interface up and down, the double-track gantry vehicle 45 slowly lowers the next component and enters the working range of the connecting device, and then the connecting device completes the connection between the current component and the next component. This operation is repeated until all components are connected. The last component to be connected is the top fixing pipe 26. After the connection is completed, the hook of the double-track gantry vehicle 45 continues to lower the top fixing pipe 26, so that its upper end flange contacts the seat plate at the top opening of the water intake buffer tank 1, and then it is fastened by bolts, and the deployment operation is completed.

[0083] When working, the water inlet filter 29 reaches the specified water intake depth, and the deep seawater enters the water intake buffer tank 1 through the water inlet filter 29, the underwater pipe 21, the flexible unit 24, the suspension load-bearing unit 23 and the water-permeable pipe 22 in the cabin, and is then sucked in by the seawater lifting pump 31 and transported to each user. At this time, the gravity of all components below the suspension load-bearing unit 23 is transmitted to the hull structure with an opening at the bottom of the water intake buffer tank 1 through the suspension load-bearing unit 23. The sealing unit 27 forms a seal between the hull structure and the suspension load-bearing unit 23 to prevent seawater near the bottom of the ship from entering the water intake buffer tank 1. The flexible unit 24 at the bottom of the ship allows itself to bend and deform at a large angle, which can release the bending moment and prevent the excessive stress concentration at this location from causing damage. Except for the flexible unit 24, all components are made of steel, and their dead weight can resist the influence of ocean currents, so that the entire water intake main 2 will not drift at a large angle, ensuring that the water inlet filter 29 is near the predetermined water intake depth.

[0084] During recovery, first remove the connecting bolts between the top fixed pipe 26 and the hull seat plate, gradually lift the entire water intake main pipe 2 above the main deck 13, and disconnect each joint in sequence by the cooperation of the chuck and the connecting device 12. Remove the top fixed pipe 26, the water-permeable pipe 22 in the cabin, the suspension load-bearing unit 23, the flexible unit 24, the underwater segmented pipe 211 and the water inlet filter 29 in sequence, lift them by the double-track gantry vehicle 45 and place them in the predetermined position in the storage rack 43, and fix them by the tooling. Then, the double-track gantry vehicle 45 lifts the closed unit 28, the water-permeable pipe 22 in the cabin and the top fixed pipe 26 in sequence, and enters the water intake buffer tank 1 in sequence through the chuck and the connecting device 12, the opening of the main deck 13, and the top opening of the water intake buffer tank 1. When each component passes through the chuck and the connecting device 12, it is connected in sequence and continues to be lowered. The last component to be connected is the top fixing pipe 26. After the connection is completed, the hook of the double-track gantry vehicle 45 continues to lower the top fixing pipe 26, so that its upper end flange contacts the seat plate at the top opening of the water intake buffer cabin 1, and at the same time, the closing unit 28 contacts the cabin opening at the bottom of the water intake buffer cabin 1, and the sealing unit 27 forms a seal, and then the upper end flange of the top fixing pipe 26 is connected and fastened to the seat plate at the top opening of the water intake buffer cabin 1 by bolts, thereby completing the recovery operation.

[0085] The lifting system in this embodiment has the following advantages:

[0086] 1. A water intake buffer tank 1 is provided to avoid the use of an underwater pump, and an in-tank pump can be used. An underwater pump needs to be equipped with a high-power underwater motor and underwater cable, which are expensive and inconvenient to repair and maintain.

[0087] 2. The use of in-cabin pumps can easily realize redundant configuration of pumps. When the in-cabin pump fails, the spare pump can be quickly started and put into use in a very short time. If an underwater pump is used, the weight of the underwater pump and the supporting motor is large, and the selection of redundant configuration will multiply the lifting load of the lifting system, and redundant configuration is impossible to achieve. Therefore, after the failure of the underwater pump, the operation of the lifting system can only be interrupted, and the underwater pump must be lifted to the main deck 13 for maintenance, which will have a fatal impact on the downstream production process that requires a continuous supply of seawater. In addition, the protection level of the underwater pump and the underwater motor is high, and the maintenance is much more time-consuming and labor-intensive than that of the in-cabin pump.

[0088] 3. The water-permeable pipe 22 in the cabin can not only transmit the force used for installation and fixing, but also allow seawater to enter the water intake buffer cabin 1 through the pipe wall.

[0089] 4. The design of the water-permeable pipe 22 in the cabin and the water intake buffer cabin 1 enables the seawater lifting pump 31 to be installed at the lowest point below the designed draft, thereby increasing the suction pressure at the pump inlet, reducing the shaft power of the seawater lifting pump 31, and reducing the working energy consumption of the pump.

[0090] 5. The design of the water-permeable pipe 22 in the cabin and the water intake buffer cabin 1 ensures that deep seawater does not need to be lifted to a height above the main deck 13 when it is taken. This not only greatly reduces the lifting height, but also shortens the pipeline length and reduces the extended resistance. The beneficial effect obtained is that the shaft power of the seawater lifting pump 31 is reduced, and the working energy consumption of the pump is reduced.

[0091] 6. The seawater channel construction type with multiple straight pipes is adopted, so that the water intake depth can reach 100-1000m. The hose winch type seawater lifting device is limited by the hose strength and the winch size and load, and the water intake depth cannot be too large; the independent / pile leg mounted tower type seawater lifting device is limited by the height of the seawater lifting tower, and the water intake depth cannot be too large, because the seawater lifting tower cannot be erected too high on the main deck 13 after recovery. On the one hand, due to the rigidity of the seawater lifting tower, a height that is too high will inevitably produce a large deflection and cannot be kept upright. On the other hand, erecting it too high will be detrimental to the stability of the platform / ship.

[0092] 7. The number of underwater segmented pipes 211 to be installed can be determined according to the actual water intake depth requirements. When the actual water intake depth is less than the designed water intake depth, the extended resistance can be reduced proportionally to reduce the energy consumption of seawater lifting.

[0093] 8. The vertical storage type using underwater segmented pipes 211 eliminates the need for horizontal-vertical conversion compared to horizontal storage, thus simplifying storage and retrieval operations.

[0094] 9. The use of the flexible unit 24 allows itself to bend and deform at a larger angle, which can release the bending moment and prevent damage caused by excessive stress concentration at that location.

[0095] 10. Use steel risers whose deadweight can resist the influence of ocean currents, so that the entire vertical pipeline will not drift at a large angle, ensuring that the water inlet filter 29 is near the predetermined water intake depth.

[0096] 11. Steel risers are used, which have long service life.

[0097] 12. Use steel risers to expand the pipe diameter and increase water intake. Rubber hoses are difficult to maintain roundness when the pipe diameter is large and tend to become oblate.

[0098] 13. The use of steel risers has a smaller friction coefficient on the inner surface of the pipe, which is beneficial to reducing extended resistance and reducing water intake energy consumption.

[0099] 14. It adopts an inboard installation type, which can independently complete deployment and recovery without the assistance of other ships.

[0100] 15. During deployment, recovery and operation, the entire inboard multi-section straight-tube seawater lifting system is always within the maximum ship width and does not affect the berthing safety of other ships and this ship.

[0101] Embodiment 2

[0102] like Fig.10 As shown, this embodiment adopts the design of water intake buffer cabin 1, water intake main pipe 2 and seawater lifting pump 31 in the above-mentioned embodiment 1 to realize seawater lifting. In this embodiment, the water intake main pipe 2 includes an underwater pipe 21 extending into the seawater, and a curved pipe slider 25 installed at the cabin opening on the outer wall of the water intake buffer cabin 1. The underwater pipe 21 is connected to the water intake buffer chamber through the curved pipe slider 25 and the cabin opening. The underwater pipe 21 is connected to the lifting wire rope 41, and the other end of the lifting wire rope 41 is connected to the hanger 42 installed on the top of the water intake buffer cabin 1. There are two lifting wire ropes 41, which are respectively connected to two hangers 42, and the two hangers 42 are respectively the first hanger 421 and the second hanger 422. A chute 11 extending in the up and down direction is provided on the outer wall of the water intake buffer cabin 1, and the curved pipe slider 25 cooperates with the chute 11. The upper end of the chute 11 extends to the top of the water intake buffer cabin 1, and the lower end of the chute 11 extends to the cabin opening. A flexible unit 24 is installed between the curved pipe slider 25 and the underwater pipe 21, and the underwater pipe 21 is connected to the curved pipe slider 25 through the flexible unit 24. The underwater pipe 21 includes multiple sections of underwater segmented pipes 211 distributed in sequence along the length direction of the underwater pipe 21, and two adjacent sections of underwater segmented pipes 211 are fixedly connected. In this embodiment, the underwater segmented pipes 211 are hoses, and a hose reel 44 is provided on the top of the water intake buffer cabin 1, and the hose reel 44 is used to reel up the underwater pipe 21.

[0103] Specifically, Fig.10As shown, the lifting system in this embodiment is composed of a hose, a hose reel 44, a first hanger 421, a second hanger 422, a bend pipe hanger 46, a slide 11, a bend pipe slider 25, a flexible unit 24, and a water inlet filter 29. It also includes a water intake buffer tank 1, a pump suction pipe 32 in the pump cabin 3, a pump suction gate valve 33, a seawater lifting pump 31 and a pump outlet pipe.

[0104] In this embodiment, the underwater pipe 21 is formed by connecting multiple sections of hoses to each other through flanges. The underwater pipe 21 is also called a hose pipe system. In the storage state, the hose is wound on the hose reel 44. The first hanger 421 and the second hanger 422 lift and lower the hose pipe system through wire ropes. The bent pipe hanger 46 lifts and lowers the bent pipe slider 25 along the slide 11 through the slider wire rope 461. The bent pipe slider 25 has a 90° elbow and is placed on the main deck 13 when not in use. When the bent pipe slider 25 is in use, it is lowered to the bottom of the slide 11 by the bent pipe hanger 46. The flexible unit 24 forms a buffer between the bent pipe slider 25 and the hose pipe system to prevent the bent pipe slider 25 from being subjected to excessive force. The first hanger 421 and the second hanger 422 mainly bear the load of the hose pipe system. The flexible unit 24 has a seawater channel with the same inner diameter as the underwater pipe 21. The pipe wall of the water inlet filter 29 is provided with many small holes to prevent the sundries in the seawater from entering the pipe.

[0105] The lifting system in this embodiment is an outboard hose type seawater lifting system, which has three working conditions: deployment, operation and recovery.

[0106] Before deployment, the hose is stored on the hose reel 44, the water inlet filter 29 is connected to the end of the stored hose, the flexible unit 24 is connected to the elbow of the elbow slider 25, and the elbow slider 25 is placed on the main deck 13. The pipeline between the cabin opening at the bottom of the side hull outer plate and the water intake buffer tank 1 is cut off by the gate valve inside the ship. The remaining seawater in the water intake buffer tank 1 can be emptied through the bilge water suction port (not shown in the figure). The lifting wire ropes of the first hanger 421 and the second hanger 422 are not connected to the hose, and the lifting wire ropes of the first hanger 421 and the second hanger 422 are stored on their matching winches.

[0107] When laying, the number of hose sections required is calculated according to the predetermined water intake depth. First, the auxiliary crane hangs the water inlet filter 29, and at the same time, the hose reel 44 slowly releases a small section of the hose. Then, the crane hangs the water inlet filter 29 outside the ship and releases it, and the hook is separated from the water inlet filter 29. The hose reel 44 continues to release the hose system until it approaches the predetermined water intake depth, at which time the required number of hose sections is about to be released. Before the lower end flange of the penultimate hose leaves the inboard, the wire ropes of the first hanger 421 and the second hanger 422 are connected to the lifting eyes of the flange. The hose reel 44 continues to release the hose, and the hose continues to descend under the action of gravity. The winches of the first hanger 421 and the second hanger 422 release the wire ropes, which are synchronized with the speed at which the hoses are released, so that the wire ropes are in a tensioned state. Before the upper flange of the penultimate hose leaves the inboard, the flange is hoisted by a crane, and the connecting bolts of the flange are disconnected, so that the released hose pipe system is completely disconnected from the hose reel 44. With the assistance of the crane, the upper flange of the hose is connected to the flexible unit 24 connected to the elbow of the elbow slider 25, and all bolts are installed and tightened, and then the crane is disengaged. The winches of the first hanger 421 and the second hanger 422 continue to release the wire rope, and the elbow hanger 46 also releases the wire rope, so that the elbow slider 25 enters the chute 11 and slides down slowly. The speeds of the three hangers releasing the wire ropes are kept synchronous so that all the wire ropes are in a tensioned state. When the elbow slider 25 reaches the stop block at the bottom of the chute 11, the wedge block will complete the fixation of the elbow slider 25 with a certain preload force. At this time, the horizontal outlet of the elbow on the elbow slider 25 cooperates with the cabin interface on the outer plate of the hull, and the sealing unit 27 forms a seal. The pipe bend hanger 46 stops releasing the steel wire rope, and the first hanger 421 and the second hanger 422 appropriately retract a small section of the steel wire rope to appropriately compress the flexible unit 24 to reduce the force on the pipe bend slider 25 and its elbow when the steel wire ropes of the first hanger 421 and the second hanger 422 are elastically deformed. At this time, the sealing unit 27 in the pipe bend slider 25 works to form a seal. At this point, the deployment operation is completed, and the water inlet filter 29 reaches the predetermined water intake depth.

[0108] During operation, the water inlet filter 29 reaches the designated water intake depth, the gate valve inboard at the elbow slider 25 opens, and the deep seawater enters the water intake buffer tank 1 through the water inlet filter 29, the underwater pipe 21, the flexible unit 24, the elbow of the elbow slider 25, the short pipe in the cabin and the gate valve in the cabin, and is then sucked in by the seawater lifting pump 31 and transported to each user. At this time, except for the top two hoses, the load of all other hoses is borne by the steel wire ropes of the first hanger 421 and the second hanger 422. Except for the flexible unit 24, all hoses have a large rigidity, and their deadweight can resist the influence of the ocean current, so that the entire vertical pipeline will not drift at a large angle, ensuring that the water inlet filter 29 is near the predetermined water intake depth.

[0109] When recovering, first close the inboard gate valve at the elbow slider 25 to cut off the flow channel. The elbow hanger 46, the first hanger 421, and the second hanger 422 recover the wire rope synchronously, so that the elbow slider 25 and the hose pipe system are lifted synchronously. When the elbow slider 25 reaches the main deck 13, the elbow hanger 46 stops recovering the wire rope, and the first hanger 421 and the second hanger 422 continue to recover a section of the wire rope, so that the two uppermost hoses are bent. At this time, the connection flanges of the elbow slider 25, the flexible unit 24 and the uppermost hose are on the main deck 13. Remove the connecting bolts to disconnect the flexible unit 24 and the uppermost hose, and then use the crane to hang the flange of the uppermost hose close to the connection point on the drum to complete the connection. The hose reel 44 recovers the hose, and the first hanger 421 and the second hanger 422 continue to recover the wire rope until the lower end flange of the second hose from the top reaches the main deck 13. Disconnect the eye plate of the lower end flange of the second hose from the first hanger 421 and the second hanger 422. At this time, the first hanger 421 and the second hanger 422 are separated from the recovery operation, and the load of all the hoses below is borne by the hose reel 44. The hose reel 44 continues to recover the hose until the water inlet filter 29 reaches above the main deck 13. The recovery operation is now completed.

[0110] The lifting system in this embodiment has the following advantages:

[0111] 1. A water intake buffer tank 1 is provided to avoid the use of an underwater pump, and an in-tank pump can be used. An underwater pump needs to be equipped with a high-power underwater motor and underwater cable, which are expensive and inconvenient to repair and maintain.

[0112] 2. The use of in-cabin pumps can easily realize redundant configuration of the pumps. When the in-cabin pump fails, the spare pump can be quickly started and put into use in a very short time. If an underwater pump is used, due to the heavy weight of the underwater pump and the matching motor, the selection of redundant configuration will multiply the lifting load of the seawater lifting device, and redundant configuration cannot be realized. Therefore, after the failure of the underwater pump, the operation of the seawater lifting device can only be interrupted, and the underwater pump must be lifted onto the main deck 13 for maintenance, which will have a fatal impact on the downstream production process that requires a continuous supply of seawater. In addition, the protection level of the underwater pump and the underwater motor is high, and the inspection and maintenance are much more time-consuming and labor-intensive than that of the in-cabin pump.

[0113] 3. The use of the curved pipe slider 25 and the slide 11 enables the top end of the hose pipe system to be connected to the water intake buffer tank 1 at a position as low as possible below the design waterline, so that seawater can enter the water intake buffer tank 1 from a position very low below the design waterline, greatly reducing the lifting height. The beneficial effect obtained is that the shaft power of the seawater lifting pump 31 is reduced, and the working energy consumption of the pump is reduced.

[0114] 4. The design of the curved pipe slider 25, the chute 11 and the water intake buffer tank 1 enables the seawater lifting pump 31 to be installed at the lowest point below the designed draft, thereby increasing the suction pressure at the pump inlet, reducing the shaft power of the seawater lifting pump 31, and reducing the working energy consumption of the pump.

[0115] 5. The design of the curved pipe slider 25, the chute 11 and the water intake buffer tank 1 ensures that when deep seawater is taken, it does not need to be lifted to a height above the main deck 13, nor does it need to be lifted to the highest point of the hose reel 44 or the seawater lifting tower. This not only greatly reduces the lifting height, but also shortens the pipeline length and reduces the extended resistance. The beneficial effect obtained is that the shaft power of the seawater lifting pump 31 is reduced, and the working energy consumption of the pump is reduced.

[0116] 6. The seawater channel construction type adopts a multi-section hose, so that the water intake depth can reach 100-500m. Conventional hose winch-type seawater lifting devices are limited by the strength of the hose and the size and load of the winch, and the water intake depth cannot be too large; independent / pile-leg mounted tower-type seawater lifting devices are limited by the height of the seawater lifting tower, and the water intake depth cannot be too large, because the seawater lifting tower cannot be erected too high on the main deck 13 after recovery. On the one hand, due to the rigidity of the seawater lifting tower, a high height will inevitably produce a large deflection and cannot be kept upright. On the other hand, erecting it too high will be detrimental to the stability of the platform / ship.

[0117] 7. The number of hoses to be released can be determined according to the actual water intake depth requirements. When the actual water intake depth is less than the designed water intake depth, the extended resistance can be reduced proportionally to reduce the energy consumption of seawater lifting.

[0118] 8. The use of a reel storage hose system reduces the number of joints that need to be connected and disconnected during deployment and recovery operations, shortening the deployment and recovery time.

[0119] 9. The use of the flexible unit 24 allows itself to bend and deform at a larger angle, which can release the bending moment and prevent damage caused by excessive stress concentration at that location.

[0120] 10. The use of the flexible unit 24 enables the main load of the hose system to be borne by the steel wire ropes of the first hanger 421 and the second hanger 422, thereby reducing the stress on the elbow slider 25 and its elbow.

[0121] 11. Use a high-rigidity hose whose deadweight can resist the influence of ocean currents, so that the entire vertical pipeline will not drift at a large angle, ensuring that the water inlet filter 29 is near the predetermined water intake depth.

[0122] 12. It adopts an outboard installation type, which can independently complete deployment and recovery without the assistance of other ships.

[0123] Embodiment 3

[0124] like Fig.11 As shown, based on the above-mentioned second embodiment, this embodiment simplifies the structure of the lifting system and removes the first hanger 421 and the second hanger 422.

[0125] Specifically, Fig.11 As shown, the lifting system in this embodiment is composed of a hose, a hose reel 44, a curved pipe hanger 46, an outboard operating table, a two-half lifting ring 462, two lifting pulleys, two lifting wire ropes 41, a slide 11, a curved pipe slider 25, a flexible unit 24, and a water inlet filter 29. It also includes a water intake buffer tank 1, a pump suction pipe 32 in the pump cabin 3, a pump suction gate valve 33, a seawater lifting pump 31 and a pump outlet pipe.

[0126] In this embodiment, the underwater pipe 21 is formed by connecting multiple sections of hoses through flanges. In the storage state, the hose is wound on the hose reel 44. The hose reel 44 has power to lift and lower the hose system. In this process, the hose reel 441 on the hose reel 44 can keep the released or not fully recovered vertical section of the hose unchanged in the horizontal plane. The curved pipe hanger 46 lifts and lowers the curved pipe slider 25 along the slide 11 through the slider wire rope 461. The curved pipe slider 25 has a 90° elbow and is placed on the main deck 13 when not in use. When the curved pipe slider 25 is in use, it is lowered to the bottom of the slide 11 by the curved pipe hanger 46. The flexible unit 24 forms a buffer between the curved pipe slider 25 and the hose system to prevent the curved pipe slider 25 from being subjected to the gravity of the hose system and the upward force generated by the movement of the hull. The lifting wire rope 41 is connected to the curved pipe hanger 46. The load of the hose system is borne by two lifting pulleys and two lifting wire ropes 41 through two half lifting rings 462. The flexible unit 24 has a seawater channel with the same inner diameter as the hose. The pipe wall of the water inlet filter 29 is opened with many small holes to prevent debris in the seawater from entering the pipeline.

[0127] The lifting system in this embodiment is an outboard hose type seawater lifting system, which has three working conditions: deployment, operation and recovery.

[0128] Before deployment, the hose is stored on the hose reel 44. After the free end of the hose passes through the hose reel 441, a section remains vertical. The water inlet filter 29 is connected to the end of the vertical section of the hose and fixed by the tooling on the deck. The elbow hanger 46 is in a recovered state, and the flexible unit 24 is connected to the elbow of the elbow slider 25, and the elbow slider 25 is placed on the main deck 13. The outboard workbench is stored on the inboard main deck 13. The pipeline between the cabin opening at the bottom of the side hull outer plate and the water intake buffer tank 1 is cut off by the gate valve inside the ship. The remaining seawater in the water intake buffer tank 1 can be emptied through the bilge water suction port (not shown in the figure). The lifting pulley and lifting wire rope 41 are not connected to the two-half lifting ring. The lifting wire rope 41 is stored on its matching winch, and the end is hung on the hook. The two-half lifting ring is not connected to the hose and is stored in a fixed position on the deck.

[0129] When laying, calculate the number of hose sections required according to the predetermined water intake depth. First, loosen the tooling that fixes the water inlet filter 29, and then slowly release the hose from the hose reel 44 until the number of hose sections required for the predetermined water intake depth is released. Turn over the outboard workbench, and move the movable part of the outboard workbench from both sides to the middle until docking is achieved at the hose, forming a continuous and safe personnel operation area around the vertical section of the hose. At this time, the opening at the center of the workbench is larger than the outer diameter of the hose, and does not hinder the up and down movement of the hose. The two-half lifting ring is lifted onto the workbench by a crane, and the two semicircles surround the hose from the bow and stern respectively. Adjust the state of the hose so that the two-half lifting ring is above the plane of the outboard operating table and below the hose flange. Use a mechanical mechanism to slightly adjust the circumferential phase of the two-half lifting ring so that the screw holes on the two-half lifting ring are aligned with the screw holes on the upper flange, and connect the bolts on the two-half lifting ring. Release the elbow hanger 46 outboard, loosen the hook of the lifting wire rope 41, connect the lifting wire rope 41 to the eye plates on both sides of the two-half lifting ring 462, tighten the lifting wire rope 41, so that the gravity of the hose below the two-half lifting ring is transferred to the wire rope, and is no longer borne by the hose above the lifting ring. Remove the hose flange, and the hose above the lifting ring is recovered upward by the hose reel 44 and disconnected from the hose below. Release the elbow and the cantilever of the flexible unit 24 on the elbow hanger 46. At this time, the lower flange of the flexible unit 24 just docks with the hose flange on the two-half lifting ring. Connect the lower flange of the flexible unit 24 and the hose flange bolts on the lifting ring, and connect the bolts that pass through these two flanges and fasten to the lifting ring. Buckle the wire rope limit eye plates on both sides of the lower flange of the elbow. The staff evacuates from the outboard operating table and opens the workbench towards the bow and stern. At the same time, the slider wire rope 461 and the lifting wire rope 41 are released, so that the elbow slider 25 slides to the bottom along the slide groove 11. At this time, the upper end hole of the elbow is just aligned with the cabin opening, and the sealing unit 27 in the elbow slider 25 works to form a seal. At this point, the deployment operation is completed, and the water inlet filter 29 reaches the predetermined water intake depth.

[0130] During operation, the water inlet filter 29 is at the specified water intake depth, the gate valve inboard at the elbow slider 25 is opened, and the deep seawater enters the water intake buffer tank 1 through the water inlet filter 29, the hose, the flexible unit 24, the elbow of the elbow slider 25, the short pipe in the cabin and the gate valve in the cabin, and is then sucked in by the seawater lifting pump 31 and transported to each user. At this time, the gravity load of all hoses is borne by the lifting wire rope 41. The flexible unit 24 has a small bending stiffness and is located between the elbow and the hose to prevent the elbow from being overstressed. The hose has a large stiffness, and its own weight can resist the influence of the ocean current, so that the entire vertical pipeline will not drift at a large angle, ensuring that the water inlet filter 29 is near the predetermined water intake depth.

[0131] When recovering, first close the inboard gate valve at the elbow slider 25 to cut off the flow channel and release the seal of the sealing unit 27. The steel wire rope of the elbow hanger 46 and the lifting wire rope 41 connected to the lifting ring are recovered synchronously, so that the elbow slider 25 and the underwater pipe 21 composed of the hose are lifted synchronously. When the lower flange of the flexible unit 24 reaches a height above the main deck 13, turn out the outboard workbench. Fine-tune the height of the two-half lifting ring so that its lower end is just above the plane of the outboard workbench. Combine the outboard workbench to form a continuous working area. The staff enters the outboard workbench, removes the bolts fastened to the lifting ring through the two flanges, and removes the bolts between the lower flange of the flexible unit 24 and the upper flange of the uppermost section of the hose. Recover the slider wire rope 461, recover the elbow on the elbow hanger 46 and the cantilever where the flexible unit 24 is located, so that it is completely located within the vertical plane of the side outer plate and does not hinder the space between the vertical hose flange above and the hose flange above the lifting ring. Drive the hose reel 44 to slowly release the hose so that the lower flange of its vertical section is close to the hose flange on the lifting ring until it is fully matched, and then connect all the bolts. Drive the hose reel 44 to slightly retract a small section of the hose so that the lifting wire rope 41 is in a relaxed state, so that the gravity load of all the hoses below is transferred to the upper hose. Remove the wire rope limit eye plates on both sides of the lower flange of the elbow, disengage the wire rope connected to the eye plates on both sides of the two-half lifting ring, recycle the wire rope, and hang the hook at the end. Loosen the connecting bolts of the two-half lifting ring, and use the crane to hoist the two semi-circular rings back to the main deck 13 storage area. The staff evacuates the outboard workbench and recycles the outboard workbench. Continue to drive the hose reel 44 to recycle the hose until the water inlet filter 29 at the lower end of the hose reaches the height of its fixing tooling, stop recycle, and fix the water inlet filter 29 with the tooling. The recovery operation is now completed.

[0132] The lifting system in this embodiment has the following advantages in addition to the advantages of the lifting system in the above-mentioned embodiment 2:

[0133] 1. Compared with the lifting system in the second embodiment, the front and rear two hangers 42 are reduced, which simplifies the system, reduces the cost, and reduces the occupied space.

[0134] 2. Compared with the lifting system in the second embodiment, the pulley of the lifting wire rope 41 is installed on the bent pipe hanger 46, which avoids a large range of changes in the angle of the lifting wire rope 41 during the lifting process and improves reliability and safety.

[0135] 3. Compared with the lifting system in the second embodiment, a pipe reel 441 is installed directly above the pipe bend hanger 46, so that when the hose is released or recovered, when the flange is disconnected or connected, when it is connected or disconnected from the flexible unit 24, and when the pipe bend slider 25 slides down or up, the vertical pipe section of the hose outside the ship always keeps the center line coincident and unchanged, which simplifies the various operations of deployment and recovery and improves the deployment and recovery efficiency, reliability and safety.

[0136] 4. Compared with the lifting system in the second embodiment, this embodiment uses a recoverable and foldable outboard working platform, which is convenient for workers to work nearby and safely, and improves the efficiency, reliability and safety of deployment and recovery.

[0137] Embodiment 4

[0138] In this embodiment, based on the above-mentioned embodiment 1, the underwater segmented pipe 211 is a hose. Meanwhile, a hose reel 44 for winding up the hose is arranged on the top of the water intake buffer tank 1 .

[0139] Specifically, Fig.12 and Fig.13 As shown, the lifting system in this embodiment is an inboard hose-type seawater lifting system, which consists of a hose, a hose reel 44, a double-track truss car 45, a top fixed pipe 26, a water-permeable pipe in the cabin 22, a sealing unit 27, a suspension load-bearing unit 23, a closing unit 28, a flexible unit 24, and a water inlet filter 29. It also includes a water intake buffer tank 1, a pump suction pipe 32 in the pump cabin 3, a pump suction gate valve 33, a seawater lifting pump 31 and a pump outlet pipe.

[0140] In this embodiment, the underwater pipe 21 is formed by connecting multiple sections of hoses through flanges. The underwater pipe 21 is a hose pipe system. In the storage state, the hose is wound on the hose drum 44. The hose drum 44 has power to lift and lower the hose pipe system. In this process, the hose reel 441 on the hose drum 44 can keep the released or not fully recovered vertical section of the hose unchanged in the horizontal plane, and its center line coincides with the center line of the cylindrical guide structure that runs through the side cabin. The flexible unit 24 is between the suspension load-bearing unit 23 and the hose pipe system, mainly bearing the alternating stress generated by the movement of the hull, and is designed as a shorter pipe section for easy maintenance and replacement. The flexible unit 24 has a seawater channel with the same inner diameter as the underwater pipe 21. There are many small holes on the pipe wall of the water inlet filter 29 to prevent debris in the seawater from entering the pipeline. The lower end of the top fixed pipe 26 and the upper end of the water inlet filter 29 are provided with a connector that can be repeatedly connected and disconnected. The upper end of the top fixed pipe 26 is provided with a flange that can be connected to the hull structure for top installation and fixation. There are many holes on the pipe wall of the water-permeable pipe 22 in the cabin, so that the seawater in the pipe can enter the water intake buffer tank 1 and transmit force at the same time. The water intake buffer tank 1 is provided with openings on the top and bottom, and the opening at the bottom constitutes the cabin opening for each pipe section and unit to pass through. A deck opening is provided on the main deck 13 just above the top opening of the water intake buffer tank 1, and the chuck is installed on the deck opening. The outer surfaces of all components that constitute the vertical pipeline, that is, the water intake main pipe 2, are continuous and smooth, without protrusions, so that it can move smoothly through each opening.

[0141] In this embodiment, the lifting system has three working conditions: deployment, operation and recovery.

[0142] Before deployment, the hose is stored on the hose reel 44. After the free end of the hose passes through the hose reel 441, a section remains vertical. The water inlet filter 29 is connected to the end of the vertical section of the hose and fixed by a tool. The suspension load-bearing unit 23 and the flexible unit 24 are connected together, placed on the main deck 13, under the double-track truss 45, and fixed by a tool. As shown in the figure, the closed unit 28 is installed at the position of the hull baseline. The closed unit 28 is connected to the cabin permeable pipe 22 and the top fixed pipe 26 in sequence, so that the closed unit 28 is pressed against the cabin opening at the bottom of the water intake buffer tank 1 to achieve watertightness between the water intake buffer tank 1 and the seawater outside the ship. The remaining seawater in the water intake buffer tank 1 can be emptied through the bilge water suction port (not shown in the figure).

[0143] Deployment preparation

[0144] When laying, preparation work is first performed. First, the chuck is opened, the hook of the double-track gantry 45 is hung on the top fixed pipe 26, the connecting bolts between the upper flange of the top fixed pipe 26 and the hull seat plate are removed, the sealing function of the sealing unit 27 of the closing unit 28 is turned off, and the wire rope 41 is lifted upward, so that the top fixed pipe 26, the cabin water-permeable pipe 22, and the closing unit 28 move upward until the upper flange of the cabin water-permeable pipe 22 exceeds the height of the chuck. The chuck is closed, the cabin water-permeable pipe 22 is clamped, and the connecting bolts between the upper flange of the cabin water-permeable pipe 22 and the lower flange of the top fixed pipe 26 are loosened. The top fixed pipe 26 is moved to the main deck 13 by the gantry gantry and fixed with a tool. Hook the hook of the double-track gantry 45 on the cabin water-permeable pipe 22, lift the hook to lift the upper flange of the closed unit 28 above the main deck 13, close the chuck to clamp the closed unit 28, remove the connecting bolts between the lower flange of the cabin water-permeable pipe 22 and the upper flange of the closed unit 28, move the cabin water-permeable pipe 22 to the main deck 13 by the gantry gantry, and fix it with a tool. Hook the hook of the double-track gantry 45 on the closed unit 28, open the chuck, and lift the closed unit 28 by the gantry gantry gantry to the main deck 13, and fix it with a tool. The preparation work is now complete.

[0145] When laying, calculate the required number of hose sections according to the predetermined water intake depth. Open the chuck, loosen the tooling that fixes the water inlet filter 29, and then slowly release the hose from the hose reel 44, so that the hose goes down along the cylindrical guide structure until the number of hose sections required for the predetermined water intake depth is released. Fine-tune the hose reel 44 so that the upper flange of the required top hose section slightly exceeds the deck height. Close the chuck, and then slowly release the hose so that the upper flange of the required top hose section contacts the upper surface of the chuck. The chuck bears the gravity of all the hoses below, and no longer the hoses above the chuck. Remove the hose flange, and the hose above the chuck is retracted upward by the reel and disconnected from the hose below. The double-track truss car 45 lifts the load-bearing unit 23 and the flexible unit 24, moves them to the top of the chuck, docks with the flange fixed by the chuck, and connects the bolts. The wire rope on the auxiliary reel of the lead-out hose reel 44 is hung on the upper flange of the flexible unit 24, and the drive reel lifts the suspension load-bearing unit 23, the flexible unit 24 and the hose below it, and the chuck is opened, and the drive reel lowers the flexible unit 24 and the hose below it, and then closes the chuck, so that the lower surface of the upper flange of the suspension load-bearing unit 23 contacts the upper surface of the chuck, and the chuck is subjected to force. The wire rope is loosened, and the water-permeable pipe 22 in the nacelle is lifted by the double-track truss car 45, moved to the top of the chuck, docked with the upper flange of the suspension load-bearing unit 23, and the bolts are connected. This cycle is repeated until the top fixed pipe 26 is connected. The wire rope on the auxiliary reel of the lead-out hose reel 44 is hung on the top fixed pipe 26, and the drive reel lifts the top fixed pipe 26 and the pipe system below it. The chuck is opened, and the drive reel lowers the top fixed pipe 26 and the pipe system below it until the suspension load-bearing unit 23 contacts the suspension structure at the bottom of the hull, so that all the gravity of the pipe system is borne by the suspension structure. At this time, the top fixing pipe 26 contacts the top structure of the water intake buffer tank 1, and all bolts are connected. The deployment operation is completed so far, and the water inlet filter 29 reaches the predetermined water intake depth.

[0146] When working, the water inlet filter 29 is at the specified water intake depth. Deep seawater enters the water intake buffer tank 1 through the water inlet filter 29, the hose, the flexible unit 24, the suspension load-bearing unit 23 and the water-permeable pipe 22 in the cabin, and is then sucked in by the seawater lifting pump 31 and transported to each user. At this time, the gravity of all components below the suspension load-bearing unit 23 is transmitted to the suspension load-bearing unit 23 and the hull suspension structure through the suspension load-bearing unit 23. The sealing unit 27 forms a seal between the hull structure and the suspension load-bearing unit 23 to prevent seawater near the bottom of the ship from entering the water intake buffer tank 1. The flexible unit 24 allows itself to bend and deform at a large angle, which can release the bending moment and prevent damage caused by excessive stress concentration at this location. The hose has a large rigidity, and its own weight can resist the influence of ocean currents, so that the entire vertical pipeline will not drift at a large angle, ensuring that the water inlet filter 29 is near the predetermined water intake depth.

[0147] During the recovery, first remove the connecting bolts between the top fixed pipe 26 section and the hull seat plate, gradually lift the entire pipe system above the main deck 13, and the chuck, the auxiliary reel of the hose reel 44 and the flange bolt removal personnel work together to disconnect each joint in turn, remove the top fixed pipe 26, the water-permeable pipe 22 in the cabin, the suspension load-bearing unit 23, and the flexible unit 24 in order, and lift them by the double-track gantry vehicle 45 to a predetermined position in the storage rack 43, and fix them by the tooling. At this time, a section of hose is fixed on the chuck, and the hose on the hose reel 44 is released so that its lower flange contacts the hose flange on the chuck, and the bolts are connected. Drive the hose reel 44 to recycle the hose until the water inlet filter 29 reaches the corresponding tooling position, and then the water inlet filter 29 is fixed by the tooling. Then, the closed unit 28, the water-permeable pipe 22 in the cabin and the top fixed pipe 26 are lifted by the double-track gantry vehicle 45 in order, and enter the water intake buffer tank 1 through the chuck, the deck opening, and the top opening of the water intake buffer tank 1 in turn. As each component passes through the chuck, it is connected in sequence and continues to be lowered. The last component to be connected is the top fixing pipe 26. After the connection is completed, the hook of the double-track gantry vehicle 45 continues to lower the top fixing pipe 26, so that its upper end flange contacts the seat plate at the top opening of the water intake buffer cabin 1, and at the same time, the closing unit 28 contacts the cabin body opening at the bottom of the water intake buffer cabin 1, and the sealing unit 27 forms a seal, and then the upper end flange of the top fixing pipe 26 is connected and fastened to the seat plate at the top opening of the water intake buffer cabin 1 by bolts, and the recovery operation is completed.

[0148] The lifting system in this embodiment has the following advantages:

[0149] 1. A water intake buffer tank 1 is provided to avoid the use of an underwater pump, and an in-tank pump can be used. An underwater pump needs to be equipped with a high-power underwater motor and underwater cable, which are expensive and inconvenient to repair and maintain.

[0150] 2. The use of in-cabin pumps can easily realize redundant configuration of the pumps. When the in-cabin pump fails, the spare pump can be quickly started and put into use in a very short time. If an underwater pump is used, due to the heavy weight of the underwater pump and the matching motor, the selection of redundant configuration will multiply the lifting load of the seawater lifting device, and redundant configuration cannot be realized. Therefore, after the failure of the underwater pump, the operation of the seawater lifting device can only be interrupted, and the underwater pump must be lifted onto the main deck 13 for maintenance, which will have a fatal impact on the downstream production process that requires a continuous supply of seawater. In addition, the protection level of the underwater pump and the underwater motor is high, and the inspection and maintenance are much more time-consuming and labor-intensive than that of the in-cabin pump.

[0151] 3. The use of the water-permeable pipe 22 in the cabin enables the upper end of the water intake pipe system to be connected to the water intake buffer cabin 1 at a position as low as possible below the designed waterline, so that seawater can enter the water intake buffer cabin 1 from a position very low below the designed waterline, greatly reducing the lifting height. The beneficial effect obtained is that the shaft power of the seawater lifting pump 31 is reduced, and the working energy consumption of the pump is reduced.

[0152] 4. The design of the water-permeable pipe 22, the sealing unit 27 and the water intake buffer tank 1 in the cabin enables the seawater lifting pump 31 to be installed at the lowest point below the designed draft, thereby increasing the suction pressure at the pump inlet, reducing the shaft power of the seawater lifting pump 31, and reducing the working energy consumption of the pump.

[0153] 5. The design of the water-permeable pipe 22, the sealing unit 27 and the water intake buffer tank 1 in the cabin ensures that when deep seawater is taken, it does not need to be lifted to a height above the main deck 13, nor does it need to be lifted to the highest point of the hose reel 44 or the seawater lifting tower. This not only greatly reduces the lifting height, but also shortens the pipeline length and reduces the extended resistance. The beneficial effect obtained is that the shaft power of the seawater lifting pump 31 is reduced, and the working energy consumption of the pump is reduced.

[0154] 6. The seawater channel construction type with multiple sections of hoses is adopted, so that the water intake depth can reach 100-500m. Conventional hose winch-type seawater lifting devices are limited by the strength of the hose and the size and load of the winch, and the water intake depth cannot be too large; independent / pile-leg mounted tower-type seawater lifting devices are limited by the height of the seawater lifting tower, and the water intake depth cannot be too large, because the seawater lifting tower cannot be erected too high on the main deck 13 after recovery. On the one hand, due to the rigidity of the seawater lifting tower, a high height will inevitably produce a large deflection and cannot be kept upright. On the other hand, erecting it too high will be detrimental to the stability of the platform / ship.

[0155] 7. The number of water intake hoses to be released can be determined according to the actual water intake depth requirements. When the actual water intake depth is less than the designed water intake depth, the extended resistance can be reduced proportionally to reduce the energy consumption of seawater lifting.

[0156] 8. The use of a reel storage hose system reduces the number of joints that need to be connected / disconnected during deployment / retrieval operations, shortening the deployment / retrieval time.

[0157] 9. The design of the hose reel 441 ensures that the vertical section of the hose remains in the same horizontal position during the release and recovery process, and its center line coincides with the center line of the cylindrical guide structure that runs vertically through the side cabin, so that the release and recovery of the hose can proceed smoothly.

[0158] 10. The use of the flexible unit 24 allows itself to bend and deform at a larger angle, which can release the bending moment and prevent damage caused by excessive stress concentration at that location.

[0159] 11. The use of the flexible unit 24 withstands the alternating stress and fatigue damage of the maximum number of cycles, and is convenient for maintenance and replacement.

[0160] 12. Use a high-rigidity hose whose deadweight can resist the influence of ocean currents, so that the entire vertical pipeline will not drift at a large angle, ensuring that the water inlet filter 29 is near the predetermined water intake depth.

[0161] 13. It adopts an inboard installation type, which can independently complete deployment and recovery without the assistance of other ships.

[0162] 14. The inboard installation type is adopted. During deployment, recovery and operation, the entire inboard multi-section straight-tube seawater lifting system is always within the maximum ship width, which does not affect the berthing safety of other ships and this ship.

[0163] 15. The use of an inboard working chuck improves reliability and safety and increases work efficiency.

[0164] Embodiment 5

[0165] In this embodiment, on the basis of the fourth embodiment, the hose reel 44 can slide from the first hose reel position to the second hose reel position.

[0166] Specifically, Fig.14 and Fig.15 As shown, the lifting system for extracting seawater provided in this embodiment is an inboard hose-type seawater lifting system, which is composed of a hose, a hose reel 44, a double-track truss car 45, a top fixed pipe 26, a water-permeable pipe in the cabin 22, a sealing unit 27, a suspension load-bearing unit 23, a closing unit 28, a flexible unit 24, and a water inlet filter 29. It also includes a water intake buffer cabin 1, a pump suction pipe 32 in the pump cabin 3, a pump suction gate valve 33, a seawater lifting pump 31 and a pump outlet pipe.

[0167] In this embodiment, the underwater pipe 21 is formed by connecting multiple sections of hoses through flanges. The underwater pipe 21 is a hose pipe system. When in the storage state, the hose is wound on the hose reel 44. The hose reel 44 has power to lift and lower the hose pipe system. In this process, the hose reel 44 can move between the first hose reel position and the second hose reel position along the length of the ship, so that the intersection of the vertical section of the hose that has been released or not fully recovered and the horizontal plane remains unchanged, and its center line coincides with the center line of the cylindrical guide structure that runs through the side cabin from top to bottom. After the deployment is completed, the flexible unit 24 is between the suspension load-bearing unit 23 and the hose pipe system, mainly bearing the alternating stress generated by the movement of the hull, and is designed as a shorter pipe section for easy maintenance and replacement. The flexible unit 24 has a seawater channel with the same inner diameter as the water intake riser. There are many small holes on the pipe wall of the water inlet filter 29 to prevent debris in the seawater from entering the pipeline. The lower end of the top fixed pipe 26 and the upper end of the water inlet filter 29 are provided with joints that can be repeatedly connected and disconnected. The upper end of the top fixed pipe 26 is provided with a flange that can be connected to the hull structure for top installation and fixation. There are many holes on the pipe wall of the water-permeable pipe 22 in the cabin, so that the seawater in the pipe can enter the water intake buffer tank 1 and transmit force at the same time. The water intake buffer tank 1 is provided with openings on the top and bottom, and the opening at the bottom constitutes the cabin opening for each pipe section and unit to pass through. A deck opening is provided on the main deck 13 directly above the top opening of the water intake buffer tank 1, and the chuck is installed on the deck opening. The outer surfaces of all components that constitute the vertical pipeline, that is, the water intake main pipe 2, are continuous and smooth, without protrusions, so that it can move smoothly through each opening.

[0168] In this embodiment, the lifting system has three working conditions: deployment, operation and recovery.

[0169] Before deployment, the hose is stored on the hose reel 44, and the hose reel 44 is in the first hose reel position. A section of the free end of the hose is kept in a vertical state. The water inlet filter 29 is connected to the end of the vertical section of the hose and fixed by a tool. The suspension load-bearing unit 23 and the flexible unit 24 are placed on the main deck 13 and below the double-track truss car 45, and are fixed by a tool. The suspension load-bearing unit 23 and the flexible unit 24 are connected together. The closed unit 28 is installed at the lowest end of the hull guide structure shown in the figure. The closed unit 28 is followed by the cabin permeable pipe 22 and the top fixed pipe 26, so that the closed unit 28 is pressed against the cabin opening at the bottom of the water intake buffer tank 1. The sealing unit 27 starts working to achieve watertightness between the water intake buffer tank 1 and the seawater outside the ship. The remaining seawater in the water intake buffer tank 1 can be emptied through the bilge water suction port (not shown in the figure).

[0170] Deployment preparation

[0171] When laying, preparation work is first performed. First, the chuck is opened, the hook of the double-track gantry 45 is hung on the top fixed pipe 26, the connecting bolts between the upper flange of the top fixed pipe 26 and the hull seat plate are removed, the sealing function of the sealing unit 27 of the closing unit 28 is turned off, and the wire rope 41 is lifted upward, so that the top fixed pipe 26, the cabin water-permeable pipe 22, and the closing unit 28 move upward until the upper flange of the cabin water-permeable pipe 22 exceeds the height of the chuck. The chuck is closed, the cabin water-permeable pipe 22 is clamped, and the connecting bolts between the upper flange of the cabin water-permeable pipe 22 and the lower flange of the top fixed pipe 26 are loosened. The top fixed pipe 26 is moved to the main deck 13 by the gantry gantry and fixed with a tool. Hook the hook of the double-track gantry 45 on the cabin water-permeable pipe 22, lift the hook to lift the upper flange of the closed unit 28 above the main deck 13, close the chuck to clamp the closed unit 28, remove the connecting bolts between the lower flange of the cabin water-permeable pipe 22 and the upper flange of the closed unit 28, move the cabin water-permeable pipe 22 to the main deck 13 by the gantry gantry, and fix it with a tool. Hook the hook of the double-track gantry 45 on the closed unit 28, open the chuck, and lift the closed unit 28 by the gantry gantry gantry to the main deck 13, and fix it with a tool. The preparation work is now complete.

[0172] When laying, calculate the required number of hose sections according to the predetermined water intake depth. First, loosen the tooling that fixes the water inlet filter 29, and then slowly release the hose from the hose reel 44 so that the hose goes down along the cylindrical guide structure. In the process of releasing the hose from the hose reel 44, the hose reel 44 gradually moves from the first hose reel position to the second hose reel position along the track so that the intersection of the vertical section of the hose and the horizontal plane remains unchanged until the number of hose sections required for the predetermined water intake depth is released. Fine-tune the hose reel 44 so that the upper flange of the required uppermost hose section slightly exceeds the deck height. Close the chuck, and then slowly release the hose so that the upper flange of the required uppermost hose section contacts the upper surface of the chuck, and the chuck bears the gravity of all the hoses below, and no longer the hose above the chuck. Remove the hose flange connection bolts, and the hose above the chuck is recovered upward by the reel, disengaged from the hose below and away. The double-track gantry vehicle 45 lifts the suspension load-bearing unit 23 and the flexible unit 24, moves them to the top of the chuck, docks them with the upper flange of the hose fixed by the chuck, and connects the bolts. The wire rope on the auxiliary reel of the hose reel 44 is led out and hung on the upper flange of the suspension load-bearing unit 23. The reel is driven to pull the wire rope, slightly lifting the suspension load-bearing unit 23, the flexible unit 24 and the hose below them, and then the chuck is opened, the reel is driven to lower the suspension load-bearing unit 23, the flexible unit 24 and the hose below them, and then the chuck is closed, so that the lower surface of the upper flange of the suspension load-bearing unit 23 contacts the upper surface of the chuck, and the chuck is stressed. The wire rope hook is released, and the water-permeable pipe 22 in the cabin is lifted by the double-track gantry vehicle 45, moved to the top of the chuck, docked with the upper flange of the suspension load-bearing unit 23, and connected with the bolts. This cycle is repeated until the top fixed pipe 26 is connected. Lead out the steel wire rope on the auxiliary reel of the hose reel 44, hang it on the top fixed pipe 26, and drive the reel to slightly lift the top fixed pipe 26 and the pipe system below it. Open the chuck, drive the reel to lower the top fixed pipe 26 and the pipe system below it until the suspension load-bearing unit 23 contacts the suspension structure at the bottom of the hull, so that all the gravity of the pipe system is borne by the suspension structure. At this time, the top fixed pipe 26 contacts the top structure of the water intake buffer tank 1, and all bolts are connected. At this point, the deployment operation is completed, and the water inlet filter 29 reaches the predetermined water intake depth.

[0173] When working, the water inlet filter 29 is at the specified water intake depth. Deep seawater enters the water intake buffer tank 1 through the water inlet filter 29, the hose, the flexible unit 24, the suspension load-bearing unit 23 and the water-permeable pipe 22 in the cabin, and is then sucked in by the seawater lifting pump 31 and transported to each user. At this time, the gravity of all components below the suspension load-bearing unit 23 is transmitted to the suspension load-bearing unit 23 and the hull suspension structure through the suspension load-bearing unit 23. The sealing unit 27 forms a seal between the hull structure and the suspension load-bearing unit 23 to prevent seawater near the bottom of the ship from entering the water intake buffer tank 1. The bottom flexible unit 24 allows itself to bend and deform at a large angle, which can release bending moment and prevent excessive stress concentration at this location from causing damage. The hose has a large rigidity, and its own weight can resist the influence of ocean currents, so that the entire vertical pipeline will not drift at a large angle, ensuring that the water inlet filter 29 is near the predetermined water intake depth.

[0174] During the recovery, first remove the connecting bolts between the top fixed pipe 26 section and the hull seat plate, gradually lift the entire pipe system above the main deck 13, and the chuck, the auxiliary reel of the hose reel 44 and the flange bolt removal personnel work together to disconnect each joint in turn, remove the top fixed pipe 26, the water-permeable pipe 22 in the cabin, the suspension load-bearing unit 23 and the flexible unit 24 in order, and lift them by the double-track gantry vehicle 45 to a predetermined position in the storage rack 43 and fix them with a tool. At this time, a section of hose is fixed on the chuck, and the hose on the hose reel 44 is released so that its lower flange contacts the hose flange on the chuck, and the bolts are connected. Drive the hose reel 44 to recycle the hose until the water inlet filter 29 reaches the corresponding tool position, and then the water inlet filter 29 is fixed by the tool. Then, the double-track gantry vehicle 45 lifts the closed unit 28, the water-permeable pipe 22 in the cabin and the top fixed pipe 26 in order, and enters the water intake buffer tank 1 through the chuck, the opening of the main deck 13, and the top opening of the water intake buffer tank 1. As each component passes through the chuck, it is connected in sequence and continues to be lowered. The last component to be connected is the top fixing pipe 26. After the connection is completed, the hook of the double-track gantry vehicle 45 continues to lower the top fixing pipe 26, so that its upper end flange contacts the seat plate at the top opening of the water intake buffer cabin 1, and at the same time, the closing unit 28 contacts the cabin body opening at the bottom of the water intake buffer cabin 1, and the sealing unit 27 forms a seal, and then the upper end flange of the top fixing pipe 26 is connected and fastened to the seat plate at the top opening of the water intake buffer cabin 1 by bolts, and the recovery operation is completed.

[0175] The lifting system in this embodiment has the following advantages based on the advantages of the lifting system in the fourth embodiment:

[0176] The design of the hose reel slide rail allows the hose reel 44 to move forward and backward, so that during the release and recovery process of the hose, the vertical section of the hose remains in the same position in the horizontal plane, and its center line coincides with the center line of the cylindrical guide structure that runs through the side cabin, so that the release and recovery of the hose can proceed smoothly. At the same time, the use of the hose reel 441 is avoided, thereby avoiding friction between the hose and the hose reel 441, and extending the life of the hose. The complex customized mechanism design of the hose reel 441 is also replaced with a simple and mature mechanism design of the mobile slide rail, which reduces costs and improves work reliability.

[0177] Embodiment 6

[0178] This embodiment is based on the above-mentioned fourth embodiment, and the hose reel 44 in this embodiment is a vertical hose reel.

[0179] Specifically, Fig.16 and Fig.17 As shown, the lifting system for extracting seawater in this embodiment is an inboard hose-type seawater lifting system, which consists of a hose, a hose reel 44, a hose reel 441, a gantry crane 5, a top fixed pipe 26, a water-permeable pipe in the cabin 22, a sealing unit 27, a suspension load-bearing unit 23, a closing unit 28, a flexible unit 24, and a water inlet filter 29. It also includes a water intake buffer tank 1, a hull guide and suspension structure, a pump suction pipe 32 in the pump room 3, a pump suction gate valve 33, a seawater lifting pump 31 and a pump outlet pipe.

[0180] In this embodiment, the underwater pipe 21 is formed by connecting multiple sections of hoses through flanges, and the underwater pipe 21 is a hose pipe system. In this embodiment, the hose reel 44 is a vertical hose reel. In the storage state, the hose is wound on the vertical hose reel. The vertical hose reel has power and can rotate around the vertical center line to actively recover or release the hose. Due to gravity, the hose outside the vertical hose reel forms a 90° angle at the hose reel 441, and is thus divided into a vertical section and a horizontal section. In the process of recovering or releasing the hose, the hose reel 441 can keep the released or unrecovered vertical section of the hose unchanged in the horizontal plane, so that the center line of the vertical section of the hose coincides with the center line of the cylindrical guide structure that runs through the side cabin; as the hose is released or recovered, the hose reel 441 can move up and down in the vertical direction, so that the hose between the vertical section of the hose and the vertical hose reel always remains horizontal. The hose reel 441 can move up and down so that the horizontal section of the hose always maintains the same height as the bottom circle of hose on the vertical hose reel. When releasing the hose, the design can keep the hose in a good stress position; when retrieving the hose, the design can wind the hose onto the vertical hose reel in an orderly manner from top to bottom, one circle at a time.

[0181] When the deep seawater lifting system is in the recovery state, the water inlet filter 29, the suspension load-bearing unit 23 and the flexible unit 24 are vertically fixed on the main deck 13, wherein the suspension load-bearing unit 23 and the flexible unit 24 are connected together. A gantry crane 5 is installed above to move the top fixed pipe 26, the cabin water-permeable pipe 22, the suspension load-bearing unit 23 and the flexible unit 24. There are many small holes on the pipe wall of the cabin water-permeable pipe 22, so that the seawater in the pipe can enter the water intake buffer tank 1 and transmit the force at the same time.

[0182] The flexible unit 24 is between the suspension load-bearing unit 23 and the hose pipe system, and is mainly subjected to the alternating stress generated by the movement of the hull. It is designed as a shorter pipe section for easy maintenance and replacement. The flexible unit 24 has a seawater channel with the same inner diameter as the underwater pipe 21. The water inlet filter 29 is installed at the bottom of the hose pipe system, and many small holes are opened on its pipe wall to prevent debris in the seawater from entering the pipeline. The upper end of the top fixed pipe 26 and the upper end of the water inlet filter 29 are provided with a connector that can be repeatedly connected and disconnected. The water intake buffer tank 1 is provided with openings at the top and bottom for each pipe section and unit to pass through. A deck opening is provided on the main deck 13 directly above the top opening of the water intake buffer tank 1, and the chuck is installed on the deck opening. The outer surfaces of all components that constitute the vertical pipeline, that is, the water intake main pipe 2, are continuous and smooth, without protrusions, so that it can move smoothly through each opening.

[0183] In this embodiment, the lifting system has three working conditions: deployment, operation and recovery.

[0184] Before deployment, the suspension load-bearing unit 23, the flexible unit 24, and the water inlet filter 29 are placed on the main deck 13 and below the gantry crane 5, and fixed by the tooling. As shown in the figure, a closed unit 28 of the same size is installed at the position of the suspension load-bearing unit 23, and the closed unit 28 is connected to the cabin water-permeable pipe 22 and the top fixed pipe 26 in sequence. The hose is stored on the vertical hose reel, and the free end of the hose passes horizontally to the left through the hose reel 441, then turns to a vertical state and is connected to the upper end of the top fixed pipe 26. The chuck clamps the flange near the main deck 13 and applies a downward force to press the closed unit 28 against the bottom opening of the water intake buffer tank 1, helping to achieve watertightness between the water intake buffer tank 1 and the seawater outside the ship. The remaining seawater in the water intake buffer tank 1 can be emptied through the bilge water suction port (not shown in the figure).

[0185] Deployment preparation

[0186] When laying, start the preparation work. First, loosen the chuck, and the hose reel 44 retracts the hose, so that the vertical pipe section of the hose moves upward until the upper flange of the top fixed pipe 26 exceeds the height of the chuck. The chuck clamps the top fixed pipe 26, loosens the connecting bolts between the vertical section of the hose and the top fixed pipe 26, and the reel retracts the hose so that the hose is completely separated from the hose reel 441. Use the tooling to hang the top fixed pipe 26 on the hook of the gantry crane 5, lift the hook to lift the closed unit 28 above the main deck 13, and then move it to the left to place it on the main deck 13. Remove the connecting bolts between the cabin permeable pipe 22 and the closed unit 28 to separate them from each other. The preparation work is now completed.

[0187] Start deployment work.

[0188] The water inlet filter 29 is hoisted and moved to the top of the chuck opening of the main deck 13 by the gantry crane 5, and the water inlet filter 29 is placed in the deck opening and continued to be lowered. When the upper flange of the water inlet filter 29 reaches the chuck height, the chuck clamps the water inlet filter 29, and then the hook of the gantry crane 5 is separated from the water inlet filter 29. The hose reel 44 releases the hose, so that the hose passes through the hose reel 441 and turns downward. At this time, the lower flange of the hose is closely aligned with the upper flange of the water inlet filter 29, and the connecting bolts are installed. The number of hose sections required is calculated according to the predetermined water intake depth. The hose reel 44 continues to release the hose, and the hose moves downward after passing through the hose reel 441 until all the hose sections required for the predetermined water intake depth are released. At this time, the water inlet filter 29 is about to reach the predetermined water intake depth, and the upper flange of the uppermost hose required for the predetermined water intake depth is at the same height as the chuck. The chuck clamps the upper flange of the uppermost hose required for the predetermined water intake depth, removes the connecting bolts of the flange, and reels the hose with the hose drum 44, so that the remaining hose is separated from the hose reel 441. The gantry crane 5 hoists the suspension load-bearing unit 23 and the flexible unit 24 to the top of the chuck, so that the lower flange of the flexible unit 24 is aligned and tightly attached to the upper flange of the hose on the chuck, and then installs the connecting bolts. The hose reel 441 is lifted to a high position, and the upper flange of the suspension load-bearing unit 23 is hung on the hose reel 441 using a tool, the chuck is released, and the hose reel 441 is moved downward. When the upper flange of the suspension load-bearing unit 23 reaches the height of the chuck, the chuck clamps the suspension load-bearing unit 23. The gantry crane hoists the top fixed pipe 26 and the cabin water-permeable pipe 22 to the top of the chuck, so that the lower flange of the cabin water-permeable pipe 22 is aligned and tightly attached to the upper flange of the suspension unit on the chuck, and then installs the connecting bolts. Lift the pipe reel 441 to a high position, use a tool to hang the upper flange of the top fixed pipe 26 on the pipe reel 441, loosen the chuck, move the pipe reel 441 downward, and when the upper flange of the top fixed pipe 26 reaches the chuck height, the chuck clamps the top fixed pipe 26. The pipe reel 441 moves to a low position, and the hose reel 44 releases the hose, so that the hose passes through the pipe reel 441 and turns downward. At this time, the lower flange of the hose is closely aligned with the upper flange of the top fixed pipe 26, and the connecting bolts are installed. The hose reel 44 continues to release the hose, so that the vertical section of the hose and the flexible unit 24, the suspension bearing unit 23, the cabin water-permeable pipe 22, and the top fixed pipe 26 move downward until the flexible unit 24 reaches below the bottom baseline of the ship, and the suspension bearing unit 23 reaches the position of the hull suspension structure. At this time, the upper flange of the section of the hose above the top fixed pipe 26 is just at the chuck height, and the chuck clamps the flange and applies a downward force, so that the entire pipe system below it cannot move upward. The hull suspension structure and the suspension load-bearing unit 23 are matched with each other in shape and size, so that the force on the entire pipe system below the suspension load-bearing unit 23 is transmitted to the hull suspension structure through the suspension load-bearing unit 23. The hose above the main deck 13 is connected to the hose reel 44 to facilitate the next recovery operation. The deployment operation is now completed, and the water inlet filter 29 reaches the predetermined water intake depth.

[0189] When working, the water inlet filter 29 is at a predetermined water intake depth. Deep seawater enters the water intake buffer tank 1 through the water inlet filter 29, the hose, the flexible unit 24, the suspension load-bearing unit 23 and the water-permeable pipe 22 in the cabin, and is then sucked in by the seawater lifting pump 31 and transported to each user. At this time, the gravity, inertia and current force of all components below the suspension load-bearing unit 23 are transmitted to the hull suspension structure through the suspension load-bearing unit 23. The sealing unit 27 forms a seal between the hull suspension structure and the suspension load-bearing unit 23 to prevent non-deep seawater near the bottom of the ship from entering the water intake buffer tank 1. The flexible unit 24 allows itself to bend and deform at a large angle, which can release the bending moment and prevent the excessive stress concentration at this location from causing damage. The hose has a large rigidity, and its own weight can resist the influence of the ocean current, so that the entire vertical pipeline will not drift at a large angle, ensuring that the water inlet filter 29 is near the predetermined water intake depth.

[0190] When recovering, first loosen the chuck, rotate the hose reel 44 to recover the hose, until the upper flange of the top fixed pipe 26 reaches the chuck height position, and the chuck clamps the top fixed pipe 26. Remove the connecting bolts between the upper flange of the top fixed pipe 26 and the hose flange above it to disconnect the connection. The hose reel 44 recovers the hose and completely detaches the hose from the hose reel 441. Use the tooling to hang the top fixed pipe 26 on the hose reel 441, loosen the chuck, and lift the hose reel 441 so that the upper flange of the suspension load-bearing unit 23 reaches the chuck height, and the chuck clamps the suspension load-bearing unit 23. Remove the connecting bolts between the cabin water-permeable pipe 22 and the suspension load-bearing unit 23, and use the gantry crane 5 to lift the top fixed pipe 26 and the cabin water-permeable pipe 22 to the main deck 13 on the left, and fix them vertically with the tooling. Use the tooling to hang the suspension load-bearing unit 23 on the hose reel 441, loosen the chuck, lift the hose reel 441, make the upper flange of the hose below the flexible unit 24 reach the chuck height, and the chuck clamps the upper flange of the hose. Loosen the chuck, rotate the hose reel 44 to release the hose, and make the hose turn downward after passing through the hose reel 441. At this time, the lower flange of the hose at the hose reel 441 is closely aligned with the upper flange of the hose at the chuck, and the connecting bolts are installed. Rotate the hose reel 44 to continuously recycle the hose, and at the same time, the hose reel 441 slowly moves downward, so that the hose can be tightly wound on the hose reel 44 from top to bottom. Rotate the hose reel 44 to continuously recycle the hose until the upper flange of the water inlet filter 29 reaches the chuck height position. The chuck clamps the water inlet filter 29, and removes the connecting bolts between the lower flange of the hose and the upper flange of the water inlet filter 29 to disconnect the connection. Rotate the hose reel 44 to continue to recycle the hose, so that the hose is completely separated from the hose reel 441. The gantry crane 5 lifts, hoists, and moves the water inlet filter 29 to the left main deck 13 area, and fixes it vertically by the tooling. The gantry crane 5 lifts, moves, and lowers the closed unit 28 into the opening of the main deck 13 at the chuck, and the chuck clamps the upper flange of the closed unit 28. The gantry crane 5 lifts and moves the top fixed pipe 26 and the cabin water-permeable pipe 22 to the top of the chuck, and lowers them so that the lower flange of the cabin water-permeable pipe 22 is closely attached to and aligned with the upper flange of the closed unit 28, and installs the connecting bolts. The chuck is loosened, the gantry crane 5 releases the sling, and the top fixed pipe 26, the cabin water-permeable pipe 22, and the closed unit 28 move downward until the upper flange of the top fixed pipe 26 reaches the height position of the chuck. The chuck clamps the top fixed pipe 26, and the hose reel 44 is rotated to release the hose, so that the hose passes through the hose reel 441 and turns downward. At this time, the lower flange of the hose at the hose reel 441 is closely aligned with the upper flange of the top fixed pipe 26 at the chuck, and the connecting bolts are installed. Loosen the chuck, rotate the hose reel 44 to release the hose, and move the pipe system downward until the closed unit 28 reaches the hull suspension structure. The hull suspension structure and the closed unit 28 match each other in shape and size. The sealing subunit on the closed unit 28 starts working to form a seal between the hull suspension structure and the suspension load-bearing unit 23 to prevent seawater from entering the water intake buffer tank 1.The remaining seawater in the water intake buffer tank 1 can be emptied through the bilge water suction port (not shown in the figure). The chuck clamps the flange near the main deck 13 and applies a downward force to press the closing unit 28 against the cabin opening at the bottom of the water intake buffer tank 1, helping to achieve watertightness between the water intake buffer tank 1 and the seawater outside the ship. The main sealing function is achieved by the sealing subunit of the closing unit 28. At this point, the recovery work of the deep seawater lifting system is completely completed. The state after recovery is the same as before deployment.

[0191] The lifting system in this embodiment has the following advantages based on the advantages of the lifting system in the fourth embodiment:

[0192] 1. The vertical hose reel is used to store the hose. With the use of the hose reel 441, the intersection point of the hose with the horizontal plane can be kept unchanged during the deployment and recovery process, which is convenient for the design of the hull guide structure and the deployment and recovery operations.

[0193] 2. A hose winding device 441 that can move up and down in the vertical direction is used, which can keep the intersection point of the hose and the horizontal plane unchanged while winding the hose in an orderly manner.

[0194] 3. During the water intake process, the hose on the reel is always connected to the top fixed pipe 26, which can shorten the preparation time for recovering the hose and improve the recovery efficiency.

[0195] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0196] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A lifting system for extracting seawater, It is characterized in that The invention comprises a water intake buffer cabin (1) having a water intake buffer chamber, a water intake main pipe (2), and a seawater lifting pump (31) installed in a pump cabin (3), wherein the water intake buffer chamber is located below the sea level, the lower end of the water intake main pipe (2) is used to extend into the seawater, the upper end of the water intake main pipe (2) is connected to the water intake buffer chamber, and the pump inlet of the seawater lifting pump (31) is connected to the water intake buffer chamber; the water intake main pipe (2) comprises an underwater pipe (21) extending into the seawater, an in-cabin water-permeable pipe (22) located in the water intake buffer chamber, and a pump cabin (31) installed therein. A suspension load-bearing unit (23) is provided in the opening of the water intake buffer cabin (1), wherein the upper and lower ends of the suspension load-bearing unit (23) are respectively connected to the cabin water-permeable pipe (22) and the underwater pipe (21); the upper end of the underwater pipe (21) is connected to the lower end of the suspension load-bearing unit (23) via a flexible unit (24); a small hole is provided on the wall of the cabin water-permeable pipe (22), and the cabin water-permeable pipe (22) can transmit a force for installation and fixing, and can also allow seawater in the pipe to enter the water intake buffer cabin (1) through the pipe wall.

2. A lifting system for extracting seawater according to claim 1, It is characterized in that The water intake main pipe (2) comprises an underwater pipe (21) extending into the seawater, and a curved pipe slider (25) installed at a cabin opening on the outer side wall of the water intake buffer cabin (1); the underwater pipe (21) is connected to the water intake buffer chamber via the curved pipe slider (25) and the cabin opening.

3. A lifting system for extracting seawater according to claim 2, It is characterized in that The underwater pipe (21) is connected to a lifting wire rope (41), and the other end of the lifting wire rope (41) is connected to a hanger (42) installed on the top of the water intake buffer tank (1).

4. The lifting system for extracting seawater according to claim 2, It is characterized in that The outer side wall of the water intake buffer cabin (1) is provided with a slide groove (11) extending in the up-down direction, the curved pipe slider (25) cooperates with the slide groove (11), the upper end of the slide groove (11) extends to the top of the water intake buffer cabin (1), and the lower end of the slide groove (11) extends to the cabin opening.

5. The lifting system for extracting seawater according to claim 2, It is characterized in that A flexible unit (24) is installed between the pipe bending slider (25) and the underwater pipe (21), and the underwater pipe (21) is connected to the pipe bending slider (25) through the flexible unit (24).

6. A lifting system for extracting seawater according to claim 1 or 2, It is characterized in that The underwater pipe (21) comprises a plurality of underwater segmented pipes (211) sequentially distributed along the length direction of the underwater pipe (21), and two adjacent underwater segmented pipes (211) are fixedly connected.

7. A lifting system for extracting seawater according to claim 6, It is characterized in that The underwater segmented pipe (211) is a steel riser, and a storage rack (43) is provided on the top of the water intake buffer cabin (1), and the storage rack (43) is used to store the steel riser.

8. The lifting system for extracting seawater according to claim 6, It is characterized in that The underwater segmented pipe (211) is a hose, and a hose reel (44) is provided on the top of the water intake buffer cabin (1), and the hose reel (44) is used to reel up the underwater pipe (21).

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