Deep water taking device and water taking method for marine fishery breeding work ship

Abstract

The invention relates to a marine fishery breeding work ship deep water taking device and method, the marine fishery breeding work ship deep water taking device comprises a water taking cantilever, a submersible pump, a guide roller, a rolling part and a lifting device, the water taking cantilever is connected with a ship body through a rotation pair, and the water taking cantilever can stably descend underwater and keep the accurate water taking depth; the water taking method comprises the steps that the position and angle of a water taking cantilever are adjusted through a winding and unwinding winch, a temperature sensor at the water taking cantilever end monitors the seawater temperature in real time, and when the temperature reaches a preset value, a submersible pump is started to extract deep seawater; compared with a traditional method, the device has the characteristics of compact structure, simple operation, high efficiency and reliability; the problems that underwater butt joint is difficult, a hose is prone to damage and the like are solved, and operation efficiency and safety are remarkably improved; through the connection of the flexible short pipe, the flexibility and the stability in the water taking process are ensured, and meanwhile, the labor intensity of operators is reduced; the technology can be widely applied to marine fishery breeding, especially extraction of deep cold water resources, and has remarkable energy-saving, environment-friendly and economic benefits.

Description

Technical Field

[0001] The present invention belongs to the technical field of deep seawater intake for marine fishery aquaculture, and particularly relates to a deep seawater intake device and an intake method for a marine fishery aquaculture workboat. Background Art

[0002] A marine fishery aquaculture workboat is a modern fishery aquaculture method that uses a closed cabin for fishery aquaculture. The aquaculture workboat can directly pump surface seawater into the cabin for fishery aquaculture. However, some high-value economic fish species need to be cultured in seawater with a lower temperature to reduce the disease rate and improve the quality of the adult fish. Reducing the temperature of the aquaculture water body by mechanical refrigeration requires a large amount of energy consumption, resulting in high aquaculture costs. Abandoning or reducing the intake of deep seawater is not conducive to improving the aquaculture quality. There are rich cold water resources distributed in the coastal areas and the exclusive economic zones of our country. Consistent cold water resources include the Yellow Sea Cold Water Mass, which covers a sea area of 130,000 square kilometers, with a depth of 20 meters to 50 meters and a summer water temperature of 5°C to 10°C; the subsurface cold water in the East China Sea appears in summer, with a water temperature of 15°C to 25°C and a depth of more than 50 meters; there are also other scattered seasonal subsurface cold water layers formed due to submarine topography and ocean currents, which have a certain temperature difference from the surface seawater and also have the value of extraction and utilization; in addition, deep seawater is cleaner and has a lower bacterial concentration, which is conducive to reducing the occurrence of aquaculture diseases. Efficiently pumping deep seawater or low-temperature seawater for workboat aquaculture by mechanical means can effectively improve the aquaculture efficiency and reduce the aquaculture cost.

[0003] Currently, for large marine fishery aquaculture workboats that have been put into use in China, professional deep seawater intake devices were not considered during design and construction. After being put into use, some temporary methods were tried for deep seawater intake, such as using the crane on the workboat to lower the submersible pump to the deep sea and connecting it with a temporary hose to extract deep seawater. These methods require a large amount of manual operation, and the safety and reliability are not guaranteed; the key point is that there are no available measures in the existing technology for how to achieve deep seawater intake at a depth of more than 50 meters; moreover, generally, a set of intake devices is equipped on the hull, resulting in the dilemma of being unable to extract deep seawater when dealing with this working condition;

[0004] Publication (Announcement) No. CN111101555A proposes a solution to lower the water intake pipe along the preset slider track structure on the outer hull of the ship to the opening position near the bottom of the hull through a ship crane; there are problems such as the sliding of the water intake pipe, difficult attitude control of the water intake pipe, and difficult underwater joint docking.

[0005] Publication (Announcement) No. CN119547756A proposes a solution to lower a hose to a certain underwater depth for deep water intake. The hose is directly lowered underwater, but it is in a "free floating" state, having the defect of being prone to floating. The hose twists and shakes repeatedly and collides and rubs against the hull and rigging frequently; the hose itself is relatively light in weight and has a large buoyancy, and it cannot stably maintain the water intake at a predetermined depth; adding a counterweight block at the end of the hose is likely to damage the hose; when a large amount of water source is needed for an aquaculture workboat, multiple hoses may have underwater interference and entanglement phenomena, which not only affect the water intake efficiency but also may cause hose damage or system failures; the hose is located at the suction end of the water pump and has a relatively long length, resulting in a large resistance. When working under high negative pressure, the hose is prone to deformation and damage, seriously affecting its durability and working efficiency.

[0006] In summary, in the prior art, whether it is the slider track structure for lowering the water intake pipe proposed in CN111101555A or the hose for lowering water intake proposed in CN119547756A, there are serious defects, resulting in poor feasibility and reliability in actual applications. Especially in terms of operability, stability, durability, and temperature control, the prior art cannot meet the requirements of efficient, precise, and stable deep seawater intake. Therefore, the water intake cantilever structure proposed in this application has significant advantages, can be more simple and stable in operation, and can achieve higher reliability and temperature control accuracy, with high technological innovation. Summary of the Invention

[0007] The present invention proposes an integral seawater extraction device, which is operated mechanically, has a compact structure, is simple to install, occupies a small space, has a low labor intensity for personnel, is safe and reliable in operation, and has high operation efficiency.

[0008] The object of the present invention is to provide a deep water intake device for an ocean fishery aquaculture workboat, including a pump, the pump is connected to a seawater storage tank or an aquaculture tank through a pipeline, and includes a water intake cantilever and a lifting device; a pump is arranged at one end of the water intake cantilever that enters the seawater, and a rotary pair is formed between the upper end of the other end or the upper end near the other end of the water intake cantilever and the hull.

[0009] The rotary pair is arranged between the water intake cantilever near the upper part and the hull and is the main rotation point, enabling the water intake cantilever to perform pitching motion around the rotation axis to complete the water entry and retraction actions.

[0010] The rotary pair needs to have a certain axial and radial clearance to adapt to the local deformation of the hull under sea conditions and the installation error.

[0011] A rolling part is arranged in the middle of the water intake cantilever to form a rolling pair with the hull.

[0012] The rolling pair includes a groove, which is arranged on the hull and used to limit the rolling part; by setting a groove with redundant width, when the water intake cantilever rotates relative to the hull, allowing rotational errors and hull deformation, the rotation of the water intake cantilever can still be carried out.

[0013] In this technical solution, when the water intake cantilever rotates relative to the hull through the rotating pair and the rolling pair, a limiting relationship is maintained between the water intake cantilever and the hull through the rolling pair.

[0014] For the hull structure of the water intake device and the aquaculture workboat, when it is long-term affected by ocean currents, thermal expansion and contraction, or load changes, the water intake device itself and the installation site may deform or be misaligned; under the influence of temperature, corrosion deformation, and after use, the hull structure will also undergo deformation and expansion. If only rigid connections are provided, problems such as the roller deviating from the groove and interference jamming may occur during the lowering process of the water intake cantilever.

[0015] The groove is provided with a redundant width ΔW, that is, the groove width is greater than the width of the rolling part, allowing the rolling pair to still guide and operate when there is a rotational error of ±θ° or an axial offset of ±ΔL, constituting the first type of local redundant flexible structure, preventing motion interference caused by overconstraint while meeting the constraint conditions.

[0016] A technical solution provided by this application also has the following technical features:

[0017] Preferably, in an embodiment of this application, a moving pair is arranged between the rolling part and the water intake cantilever, enabling the rolling pair to move relative to the water intake cantilever, and the moving direction is along the water intake cantilever; the moving pair is used to decouple the interference force of hull deformation and rotational error on the rolling pair and relieve the risk of jamming.

[0018] The moving pair provides a free movement tolerance δL, effectively absorbing the additional load caused by hull yaw or installation error, constituting the second type of local redundant flexible structure, preventing motion interference caused by overconstraint while meeting the constraint conditions.

[0019] The rolling part is a roller or a spherical wheel; combined with the arranged moving pair, when the movement of the rotating pair and the rolling pair is interfered, that is, when the movement generates a dead point or the redundant space is insufficient, it is relieved through the moving pair, tolerating the vibration of the water intake cantilever or the error along the cantilever direction, and ensuring the normal rotation of the water intake cantilever.

[0020] Through the collaborative design of the rotating pair + rolling pair + moving pair, and combined with the release of the redundant groove width and the freedom degree of the sliding pair, this technical solution can ensure that the water intake cantilever stably and efficiently completes the deep seawater extraction action under adverse conditions such as hull deformation, water intake error, and environmental fluctuations, significantly improving the robustness and adaptability of the system.

[0021] Preferably, in one embodiment of the present application, a rolling pair is formed between the rolling part and the hull through rollers and guide grooves, ensuring that the cantilever moves in a controlled path during the pitch process and limiting its lateral swing; the guide groove is arc-shaped and the rolling trajectory has high consistency; the rolling pair has a limiting guide function, which is required to prevent the roller from getting out of the groove.

[0022] Preferably, in one embodiment of the present application, the water intake cantilever is a truss structure, including a water intake arm frame, a submersible pump, a water intake pipe, a hull connecting pipe, a temperature sensor, and a cable pipe;

[0023] The submersible pump, water intake pipe, hull connecting pipe, temperature sensor and cable pipe are arranged in a water intake arm frame; the cables of the submersible pump and the temperature sensor are laid in the cable pipe; the water intake pipe, hull connecting pipe and the cable pipe are fixed to the water intake arm frame by pipe clamps; anti-friction gaskets made of flexible materials are arranged at the fixing places of the pipe clamps to protect the pipelines.

[0024] Preferably, in one embodiment of the present application, a guide roller is installed on the water intake cantilever on the side close to the hull.

[0025] Preferably, in one embodiment of the present application, at least one water intake cantilever is arranged on both sides of the hull along the length of the ship; the hull connecting pipe at the upper part of the water intake cantilever is connected to the hull through a group of bearings, so that the water intake cantilever can rotate around the bearings; the lower part of the water intake cantilever is connected to the retractable winch arranged on the deck of the hull through a lifting cable, and the water intake cantilever is lifted or lowered by the retractable winch to adjust the water entry depth of the submersible pump; an arc-shaped guide groove is provided on the outer surface of the hull to limit the lateral swing of the water intake cantilever when it is lifted or lowered.

[0026] Preferably, in one embodiment of the present application, the water intake device is connected to the water inlet pipeline of the hull: the hull connecting pipe at the upper part of the water intake cantilever is connected to one end of the flexible short pipe after passing through the bearing, and the other end of the flexible short pipe is connected to the water inlet pipe of the construction ship, and a water inlet valve is installed on the water inlet pipe of the construction ship.

[0027] Preferably, in one embodiment of the present application, an arc-shaped guide groove is provided on the outer plate of the hull to prevent the guide roller from being out of contact with the hull, so as to limit the lateral swing of the water intake boom.

[0028] Preferably, in one embodiment of the present application, when the water intake cantilever is in a fully lowered position, an auxiliary rope is provided at the lower portion of the water intake cantilever to assist in fixing the water intake cantilever.

[0029] Preferably, in an embodiment of the present application, for a deep water intake method of an ocean fishery breeding workboat, during water intake, the lifting cable is released by the winch to lower the water intake cantilever. The water intake cantilever rotates downward around the bearing, and the guiding rollers on the water intake cantilever move downward along the guiding groove to limit the lateral swing during the descent of the water intake cantilever. The temperature sensor at the end of the water intake cantilever is used to feedback the seawater temperature in real time. When the detected seawater temperature is appropriate, the winch stops lowering the lifting cable, and the hull connecting pipe and the workboat water inlet pipe are connected through a flexible short pipe; the water inlet valve is opened, and the submersible pump is started to extract low-temperature seawater.

[0030] After the water intake operation is completed, the submersible pump is stopped, the water inlet valve is closed, the flexible short pipe is removed, and the winch is started to recover the lifting cable, so that the water intake cantilever rotates upward around the bearing, and the guiding rollers on the water intake cantilever move upward along the guiding groove to limit the lateral swing during the ascent of the water intake cantilever until the water intake cantilever returns to the storage position and is fixed, and then the winch is stopped.

[0031] The hull connecting pipe and the workboat water inlet pipe are connected through a flexible short pipe. When the water intake cantilever is at different horizontal angles, the flexible short pipe adapts to the connection between the hull connecting pipe and the workboat water inlet pipe and the small rotation of the hull connecting pipe caused by the swing of the water intake cantilever during operation.

[0032] The additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present invention.

[0033] The deep water intake method of the breeding workboat of the present application has the characteristics of compact structure, simple installation, convenient operation, high efficiency, safety and reliability, and improves the breeding efficiency of high-value economic fish species.

[0034] In order to solve the problem that existing ocean fishery breeding workboats cannot efficiently and reliably extract deep cold water resources, the integrated technical feature of "rotatable water intake cantilever structure + submersible pump lowering + guiding roller limit + flexible short pipe connection" is adopted, which overcomes the defects in the prior art such as the blockage of the water intake pipe during sliding, the difficulty of underwater docking, the difficult attitude control, and the floating, winding and large loss of the hose, and achieves the following remarkable technical effects:

[0035] 1. The mechanized operation of the water intake device is realized, with a compact structure, simple installation, small floor area, safety and reliability;

[0036] 2. By using the rotational movement of the water intake cantilever, the precise lowering of the end of the submersible pump is realized, avoiding the problem of underwater structure docking;

[0037] 3. The guiding rollers cooperate with the arc-shaped guiding groove to effectively limit the swing of the water intake arm and improve the stability of the device in the wind and wave environment;

[0038] 4. The flexible short pipe connects the water intake system, allowing the device to operate at different angles of the water intake arm, improving the reliability and flexibility of the connection;

[0039] 5. Temperature sensors can be arranged at the end of the water intake arm to monitor the water temperature in real time, accurately control the water intake depth, and improve the water intake quality;

[0040] 6. Suitable for the layout of multiple systems without interference, meeting the large-scale seawater demand scenario, and improving the scalability and adaptability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0042] Figure 1 It is a side view of the hull with the water intake cantilever arranged according to an embodiment of the present invention, and the water intake cantilever is in the deck storage position;

[0043] Figure 2 It is a side view of the hull with the water intake cantilever arranged according to an embodiment of the present invention, and the water intake cantilever is in the partially lowered position;

[0044] Figure 3 It is a side view of the hull with the water intake cantilever arranged according to an embodiment of the present invention, and the water intake cantilever is in the fully lowered position;

[0045] Figure 4 It is a top view of the hull with the water intake cantilever arranged according to an embodiment of the present invention, and the water intake cantilever is in the deck storage position;

[0046] Figure 5 It is a cross-sectional view of the hull with the water intake cantilever arranged according to an embodiment of the present invention, and the water intake cantilever is in the fully lowered position;

[0047] Figure 6 It is a schematic structural diagram of the water intake cantilever frame according to an embodiment of the present invention;

[0048] Figure 7 It is a schematic diagram of the connection between the water intake cantilever hull connecting pipe and the workboat water inlet pipe according to an embodiment of the present invention;

[0049] Figure 8 It is a schematic cross-sectional view of the water intake cantilever according to an embodiment of the present invention;

[0050] Figure 9 It is a schematic cross-sectional view of the guiding groove according to an embodiment of the present invention;

[0051] Elements in the figure:

[0052] 1. Hull

[0053] 2. Water intake cantilever

[0054] 3. Water intake pipe

[0055] 4. Hull connecting pipe

[0056] 5. Water intake cantilever frame

[0057] 6. Submersible pump

[0058] 7. Temperature sensor

[0059] 8. Pipe clamp

[0060] 9. Anti-abrasion gasket

[0061] 10. Bearing

[0062] 11. Flexible short pipe

[0063] 12. Inlet valve

[0064] 13. Workboat inlet pipe

[0065] 14. Winch for retracting and deploying

[0066] 15. Guide groove

[0067] 16. Guide roller

[0068] 17. Cable pipe

[0069] 18. Lifting cable

[0070] 19. Auxiliary cable Detailed implementation manners

[0071] The following further elaborates the detailed implementation manners of the present application in conjunction with the accompanying drawings. These implementation manners are only used to illustrate the present application and are not intended to limit the present invention.

[0072] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0073] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0075] For example Figures 1-9 , a deep water intake device for an ocean fishery breeding workboat, comprising a pump, the pump being connected to a seawater storage tank or a breeding tank through a pipeline, and comprising a water intake cantilever and a lifting device; a pump is arranged at one end of the water intake cantilever that enters the seawater, and a rotary pair is formed between the upper end of the other end or the upper end near the other end of the water intake cantilever and the hull;

[0076] A rolling part is arranged in the middle of the water intake cantilever to form a rolling pair with the hull;

[0077] The rolling pair includes a groove, the groove is arranged on the hull for limiting the rolling part; a moving pair is arranged between the rolling part and the water intake cantilever to enable the rolling pair to move relative to the water intake cantilever, and the moving direction is along the water intake cantilever; the rolling part is a roller or a spherical wheel; the water intake cantilever 2 is of a truss structure and includes a water intake arm frame 5, a submersible pump 6, a water intake pipe 3, a hull connecting pipe 4, a temperature sensor 7, and a cable pipe 17;

[0078] A submersible pump 6, a water intake pipe 3, a hull connecting pipe 4, a temperature sensor 7 and a cable pipe 17 are arranged in a water intake arm frame 5; the cables of the submersible pump 6 and the temperature sensor 7 are laid in the cable pipe 17; the water intake pipe 3, the hull connecting pipe 4 and the cable pipe 17 are fixed to the water intake arm frame 5 by means of a pipe clamp 8; a friction-proof gasket 9 made of flexible material is arranged at the fixing position of the pipe clamp 8 to protect the pipeline; a guide roller 16 is installed on the side of the water intake cantilever 2 close to the hull 1; at least one water intake cantilever 2 is arranged on both sides of the hull 1 along the length direction of the ship; the hull connecting pipe 4 at the upper part of the water intake cantilever 2 is connected to the hull 1 through a group of bearings 10, and the water intake cantilever 2 can rotate around the bearings 10; the lower part of the water intake cantilever 2 is connected to the retractable winch 14 arranged on the deck of the hull 1 through a lifting rope 18, and the retractable winch is used to retract the cantilever 2. The vehicle 14 lifts or lowers the water intake boom 2 to adjust the water entry depth of the submersible pump 6; an arc-shaped guide groove 15 is provided on the outer surface of the hull 1 to limit the lateral swing of the water intake boom 2 when it is lifted or lowered; the connection between the water intake device and the water inlet pipeline of the hull 1: the hull connecting pipe 4 on the upper part of the water intake boom 2 is connected to one end of the flexible short pipe 11 after passing through the bearing 10, and the other end of the flexible short pipe 11 is connected to the water inlet pipe 13 of the working ship, and the water inlet pipe 13 of the working ship is installed with a water inlet valve 12; an arc-shaped guide groove 15 is provided on the outer plate of the hull 1 to prevent the guide roller 16 from being out of contact with the hull 1, so as to limit the lateral swing of the water intake boom 2; when the water intake boom 2 is in the fully lowered position, an auxiliary rope 19 is provided at the lower part of the water intake boom 2 to assist in fixing the water intake boom 2;

[0079] In view of the defects of the slider track structure and the hose in the prior art, the interface between the water intake pipe and the hull of the method proposed in this application is on the deck, and the water intake cantilever is rotated by gravity through the ship's lifting equipment to lower the submersible pump at the end to a predetermined depth. The implementation of this method is obviously feasible and reliable;

[0080] The submersible pump used in the method proposed in the present application is located at the end of the water intake boom and can directly extract seawater.

[0081] The moving position and moving space of the water intake pipe of the present application do not depend on the surface of the hull; and the deformation of the hull does not affect its use;

[0082] The method proposed in the present application can smoothly lower the water intake cantilever without the need for underwater docking, is practical, easy to operate, and reliable in operation.

[0083] This application does not use a water suction hose, avoiding the "free floating" state of the water intake pipe, which will not twist and shake repeatedly, nor will it get entangled. It will not collide or rub against the hull and rigging, and can be stabilized at a specified water depth. When the aquaculture workboat has a large water consumption, multiple water intake pipes need to be used simultaneously, and multiple water intake pipes underwater will not interfere or get entangled. The pump of this application enters the water, and there will be no problem that the water intake pipe is flattened by the negative pressure formed by pumping seawater, resulting in the defect of being unable to draw water. Moreover, there is no need to use a hardened water intake pipe. By setting the pump at the end of the water intake pipe and introducing seawater, the above defects can be avoided. This application installs a temperature sensor to observe the seawater temperature in real time. The method proposed in this application is a way of mechanized operation of a rigid water intake cantilever to achieve the deep water intake function. The attitude of the water intake cantilever underwater is controllable, and multiple sets can be arranged as needed without interfering with each other. Temperature sensors can be installed to monitor the water temperature, and the operation is simple, reliable, and safe.

[0084] Due to the particularity of the marine environment, the hull will undergo elastic deformation, and the water intake pipe of this application can resist or accommodate this deformation, allowing this deformation to occur without affecting the water intake operation, so that the overall water intake device can work properly.

[0085] When implementing this application, the implementation key points are as follows:

[0086] 1. Water intake cantilever structure: Adopt a truss-type rigid water intake arm with a stable structure, integrating a submersible pump, a water intake pipe, a cable pipe, and a temperature sensor inside, with a high degree of functional integration, facilitating overall operation and maintenance.

[0087] 2. Rotation and guiding mechanism: One end of the water intake cantilever is connected to the hull through a bearing and can rotate around the bearing to achieve lowering and recovery. Guide rollers are arranged in the middle and arc-shaped guide grooves are provided on the hull to effectively limit the lateral swing of the water intake cantilever and improve the operation stability.

[0088] 3. Power control system: By setting a winch on the deck to control the retraction and release of the lifting cable, the lowering and recovery of the water intake arm are realized, with simple operation, safety, and controllability.

[0089] 4. Flexible connection structure: The upper part of the water intake cantilever is connected to the workboat water inlet system through a flexible short pipe, adapting to the angle change of the water intake arm, ensuring fluid connection while reducing mechanical stress and enhancing the system reliability.

[0090] 5. Intelligent monitoring function: A temperature sensor is configured at the end of the water intake arm to realize the dynamic linkage control of the water intake depth and water temperature, improving the water intake accuracy and water quality guarantee ability.

[0091] 6. Scalable deployment: Multiple sets of the device can be arranged along the hull without interfering with each other, meeting the requirements of large water volume operations and having good system scalability.

[0092] Jointly ensure the mechanical stability, operation flexibility, operation reliability and water intake intelligence of the system, and are applicable to various deep seawater extraction operation environments;

[0093] The working process of this application is as follows:

[0094] 1. Initial preparation: The water intake cantilever is in the storage state on the deck side, connected to the hull through bearings, equipped with a submersible pump at the end, and integrated with a water intake pipe, a cable pipe and a temperature sensor inside. The system is on standby;

[0095] 2. Lower the water intake arm: Start the winch for retracting and extending, release the lifting cable. The water intake cantilever rotates downward around the hull under the action of gravity with the bearing as the center, and the guiding roller slides along the guiding groove on the outer plate of the hull, restricting its lateral swing to ensure the stable descent of the water intake arm;

[0096] 3. Control the lowering depth: The temperature sensor monitors the water temperature at the water intake point in real time. When the monitored water temperature reaches the set value (i.e., the target deep seawater), stop the winch from lowering, and the water intake cantilever is stabilized at the predetermined depth;

[0097] 4. Connect the water supply system: Connect the hull connecting pipe of the water intake cantilever to the water inlet pipe of the workboat through a flexible short pipe, open the inlet valve, start the submersible pump, and start pumping cold seawater into the aquaculture tank or storage tank in the hull;

[0098] 5. Stop the operation and recover: After completing the water intake, close the inlet valve, stop the submersible pump, remove the flexible short pipe, start the winch to recover the lifting cable, and make the water intake arm rotate in the reverse direction to return to the initial position and fix it;

[0099] The whole process realizes a mechanized, automated and integrated operation process from lowering, water intake, monitoring, water supply to recovery, and has the advantages of high efficiency, high safety and high adaptability.

[0100] Through the integrated design of "water intake cantilever + rolling pair + guiding roller and guiding groove + temperature sensor + flexible connecting pipe", the technical solution of this application can also solve the following technical problems:

[0101] Under complex sea conditions (such as hull swaying, wind and wave interference), how to ensure the system stability and the structural safety of key components during the deep water intake operation process, especially how to avoid the shaking or impact damage of the water intake device caused by the rolling and pitching of the hull, and ensure its long-term operation reliability;

[0102] By setting up a rolling pair and a guiding roller on the water intake cantilever to cooperate with the guiding groove, a restricted trajectory control is formed, enabling the movement path of the cantilever to be controlled during the lowering and retracting processes, greatly reducing the risks of lateral swaying and collision. In addition, a flexible decoupling between the rigid water intake arm and the hull water intake system is achieved through a flexible short pipe, further buffering the mechanical stress transmission caused by the hull swaying and enhancing the adaptive capacity and structural life of the system under various working conditions. This combined structure has significant advantages in terms of anti-interference, buffering, and safety. The prior art does not provide a similar anti-sway collaborative structure, showing obvious innovation and progressiveness.

[0103] Specifically, in an embodiment of the present application, for a deep water intake method of an ocean fishery aquaculture workboat, during water intake, the hoisting cable 18 is released by the winch 14 for retracting and paying out, causing the water intake cantilever 2 to lower. The water intake cantilever 2 rotates downward with the bearing 10 as the center. The guiding roller 16 on the water intake cantilever 2 moves downward along the guiding groove 15, restricting the lateral swing of the water intake cantilever 2 during the descending process. The temperature sensor 7 at the end of the water intake cantilever 2 is used to feedback the seawater temperature in real time. When the detected seawater temperature is appropriate, the winch 14 for retracting and paying out stops releasing the hoisting cable 18. The hull connecting pipe 4 and the workboat water inlet pipe 13 are connected through the flexible short pipe 11. The inlet valve 12 is opened, and the submersible pump 6 is started to begin extracting low-temperature seawater.

[0104] After the water intake operation is completed, the submersible pump 6 is stopped, the inlet valve 12 is closed, the flexible short pipe 11 is removed, and the winch 14 for retracting and paying out is started to recover the hoisting cable 18, causing the water intake cantilever 2 to rotate upward with the bearing 10 as the center. The guiding roller 16 on the water intake cantilever 2 moves upward along the guiding groove 15, restricting the lateral swing of the water intake cantilever 2 during the ascending process, until the water intake cantilever 2 returns to the storage position and is fixed, and then the winch 14 for retracting and paying out is stopped.

[0105] The hull connecting pipe 4 and the workboat water inlet pipe 13 are connected through the flexible short pipe 11. When the water intake cantilever 2 is at different horizontal angles, the flexible short pipe 11 adapts to the connection between the hull connecting pipe 4 and the workboat water inlet pipe 13 and the small rotation of the hull connecting pipe 4 caused by the swing of the water intake cantilever 2 during the operation.

[0106] Specifically, in an embodiment of the present application, when in use, a submersible pump 6, a water intake pipe 3, a cable pipe 17, etc. are installed in the truss structure of the water intake arm frame 5 to form an integral water intake cantilever 2; the hull connection pipe 4 of the water intake cantilever 2 is connected to the hull 1 through a set of bearings 10, enabling the water intake cantilever 2 to rotate around the bearings 10; the lower part of the water intake cantilever 2 is connected to a winch 14 on the ship deck through a flexible rope, and the winch 14 is used to lift or lower the water intake cantilever 2 to adjust the water inlet depth of the submersible pump 6; an arc-shaped guide groove 15 is provided on the outer surface of the hull 1 to limit the lateral swing of the water intake cantilever 2 when it is lifted or lowered. When the present invention is used on an industrial ship for marine fishery breeding, it can efficiently pump deep low-temperature seawater for breeding high-value economic fish species, improve breeding efficiency, reduce breeding energy consumption, have low labor intensity of personnel, reliable operation safety, and high operation efficiency.

[0107] Specifically, in an embodiment of the present application, according to the specific requirements of the ship size, water intake volume, and water intake depth, the water intake cantilever 2 of the present invention is fabricated as the core component for realizing the deep water intake function, and the water intake cantilever 2 is lowered or lifted mechanically to achieve the deep water intake function.

[0108] Specifically, in an embodiment of the present application, the present invention uses an integral water intake cantilever 2 as the core component for realizing the deep water intake function, and the water intake cantilever 2 is lowered or lifted mechanically to achieve the deep water intake function.

[0109] Specifically, in an embodiment of the present application, the water intake cantilever 2 is of a truss structure. A submersible pump 6 is installed at the lower end of the water intake cantilever 2. The outlet of the submersible pump 6 is connected to the water intake pipe 3, and the other end of the water intake pipe 3 is connected to the hull connection pipe 4. The power cables and signal cables of the submersible pump 6 and the temperature sensor 7 are laid in the cable pipe 17. The water intake pipe 3, the hull connection pipe 4, and the cable pipe 17 are fixed to the frame structure of the water intake cantilever 2 through pipe clamps 8. Anti-abrasion gaskets 9 are provided at the fixed positions of the pipe clamps 8 to protect the pipelines. The temperature sensor 7 is installed at the front end of the water intake cantilever 2, and the above manner forms an integral structure of the water intake cantilever 2.

[0110] Specifically, in an embodiment of the present application, the guide roller 16 is installed on the side of the water intake cantilever 2 structure facing the hull 1.

[0111] Specifically, in an embodiment of the present application, one set or multiple sets of water intake cantilevers 2 can be arranged according to the size of the industrial ship and the required water intake volume.

[0112] Specifically, in an embodiment of the present application, the integral water intake cantilever 2 is arranged on both sides of the hull 1 of the aquaculture workboat along the ship length direction. The hull connection pipe 4 on the upper part of the water intake cantilever 2 is connected to the water inlet pipeline on the hull 1 through a set of bearings 10, and the water intake cantilever 2 can rotate around the bearings 10; the lower part of the water intake cantilever 2 is connected to a lifting cable 18 and is connected to a winch 14 arranged on the deck of the hull 1. The winch 14 is used to lift or lower the water intake cantilever 2 to adjust the water depth of the submersible pump 6; an arc-shaped guiding groove 15 is arranged on the outer surface of the hull 1 to limit the lateral swing of the water intake cantilever 2 when it is lifted or lowered.

[0113] Specifically, in an embodiment of the present application, as Figure 3 , the water intake cantilever 2 is connected to two lifting cables 18. After the lateral swing of the water intake cantilever 2 is restricted by the guiding groove 15, if the hull is not static, or in other words, if there are large waves or water flow velocities around the hull, if Figure 2 a single lifting cable 18 is used for lowering operation or static operation, the water flow impacts the water intake cantilever 2, making it impossible for the water intake cantilever 2 to be stabilized at the specified depth. Therefore, two lifting cables 18 are used to limit the swing of the water intake cantilever 2 in two directions, so as to achieve the purpose of the water intake cantilever 2 resisting the water flow impact, overcome the water intake operation under non-static hull conditions, and be sufficient to resist the impact of seawater waves or water flow velocities, ensuring the stability of the water intake operation.

[0114] Specifically, in an embodiment of the present application, after the hull connection pipe 4 on the upper part of the water intake cantilever 2 passes through the bearings 10, it is connected to one end of a flexible short pipe 11, and the other end of the flexible short pipe 11 is connected to the workboat water inlet pipe 13. An inlet valve 12 is installed on the workboat water inlet pipe 13.

[0115] Specifically, in an embodiment of the present application, the hull connection pipe 4 is used as a rotating shaft and also bears the weight and motion load of the water intake cantilever 2. Appropriate thickness and material are selected according to mechanical calculations during engineering applications.

[0116] Specifically, in an embodiment of the present application, an arc-shaped guiding groove 15 is installed on the outer plate of the hull 1, and the guiding rollers 16 on the water intake cantilever 2 travel in the guiding groove 15; the size of the guiding groove 15 matches the size of the guiding rollers 16.

[0117] Specifically, in an embodiment of the present application, a flexible short pipe 11 is installed between the hull connection pipe 4 and the workboat water inlet pipe 13 to adjust the connection between the hull connection pipe 4 and the workboat water inlet pipe 13 when the water intake cantilever 2 is at different horizontal angles, and can absorb the small rotation of the hull connection pipe 4 caused by the swing of the water intake cantilever 2. The connection method between the flexible short pipe 11 and the hull connection pipe 4 can be a sliding sleeve type or a flange form.

[0118] Specifically, in an embodiment of the present application, when taking water, the lifting cable 18 is released by the winch 14, so that the water intake cantilever 2 is lowered. The water intake cantilever 2 rotates downward around the bearing 10, and the guide roller 16 on the water intake cantilever 2 moves downward along the guide groove 15, restricting the lateral swing of the water intake cantilever 2 during the descending process. The temperature sensor 7 installed at the end of the water intake cantilever 2 real-time feeds back the seawater temperature. When the detected seawater temperature is appropriate, the winch 14 stops releasing the lifting cable 18, and the flexible short pipe 11 is installed to connect the hull connecting pipe 4 and the workboat water inlet pipe 13. The inlet valve 12 is opened, and the submersible pump 6 is started to begin extracting low-temperature seawater; after the water intake operation is completed, the submersible pump 6 is stopped, the inlet valve 12 is closed, the flexible short pipe 11 is removed, and the winch 14 is started to recover the lifting cable 18, so that the water intake cantilever 2 rotates upward around the bearing 10, and the guide roller 16 on the water intake cantilever 2 moves upward along the guide groove 15, restricting the lateral swing of the water intake cantilever 2 during the ascending process, until the water intake cantilever 2 returns to the deck storage position and is fixed.

[0119] Specifically, in an embodiment of the present application, according to the specific requirements of the ship size, water intake volume, and water intake depth, the water intake cantilever 2 of the present invention type is manufactured as the core component to realize the deep water intake function, and the water intake cantilever 2 is lowered or lifted mechanically to realize the deep water intake function.

[0120] Specifically, in an embodiment of the present application, the present invention proposes an integral seawater extraction device, which is operated mechanically, has a compact structure, is simple to install, occupies a small space, is convenient to operate, has a low labor intensity for personnel, is safe and reliable in operation, and has a high operation efficiency, and can be applied to various types of deep-sea fishery breeding workboats.

[0121] Specifically, in an embodiment of the present application, the present invention adopts a modular water intake cantilever 2. Through the bearing 10 on the deck, only rotational displacement occurs at the connection surface between the water intake cantilever 2 and the hull 1 pipeline, without linear displacement. The flexible short pipe 11 can conveniently adapt to the angle change of the water intake cantilever 2, and the connection between the water intake pipe 3 and the hull 1 pipeline is simple and reliable; during operation, only one winch is needed to complete the lifting and lowering of the water intake cantilever 2, which can adapt to the changes in different water depths; a temperature sensor 7 is installed at the end of the water intake cantilever 2, which can observe the deep seawater temperature in real time; the water intake cantilever 2 has a compact structure and is simple to install, and can be arranged one or more according to actual needs.

[0122] Specifically, in an embodiment of the present application, the present invention adopts a modular design, which is characterized by a compact structure, simple installation, small floor space, flexible layout, and easy expansion of quantity or size. According to the rotation principle of the bearing 10 and by means of the connection mode of the flexible short pipe 11, the present invention can well adapt to the angular change of the water intake cantilever 2, making the connection between the water intake cantilever 2 and the hull 1 simple and reliable, with low working intensity and high safety. The present invention has a high degree of mechanization, and only one winch is needed to complete the retraction and extension of the water intake cantilever 2 or adjust the water depth, with high working efficiency. The method proposed by the present invention is flexible in use, can be applied to various aquaculture workboats, and has broad application prospects.

[0123] Generally speaking, the technical advantages of the present application are as follows:

[0124] Precisely control the water intake depth to ensure stable water temperature; ensure suitable aquaculture water temperature and reduce the disease rate; the closed guide groove design effectively limits lateral drift; expand the working tolerance and be compatible with structural micro-movement; increase the efficiency by more than 60%; reduce the labor intensity and risk; meet the water change requirements for high-density aquaculture; improve the energy efficiency by 33% and be more energy-saving during long-term operation; ensure the normal use of the device in bad weather; reduce the maintenance cost and extend the replacement cycle.

[0125] Taking the water intake operation condition of a South China Sea workboat at a depth of 50 meters off the coast of the East China Sea in summer as a comparison, with the hull slightly swaying (±10°), wave height of 1.5 meters, and obvious water temperature stratification (28°C at the surface and 18°C at 50 meters), the actual measurements are as follows:

[0126]

[0127] Furthermore, compare the present application with the prior art:

[0128]

[0129] Generally speaking, the present invention aims to solve the technical problems existing in the process of deep seawater intake of existing marine fishery aquaculture workboats, such as complex operation, poor safety, unstable water intake depth, and insufficient equipment reliability. It provides a deep water intake device and method with a compact structure, high operation efficiency, safe operation, and precise control of water intake depth. By setting a water intake cantilever, a guide roller and a guide groove, a temperature sensor, a winch for retraction and extension, and a flexible short pipe connection mechanism, the controllable rotation and stable lowering of the water intake cantilever outside the hull are realized, and the low-temperature seawater at the target depth can be efficiently and safely pumped into the aquaculture tank to meet the low-temperature aquaculture requirements of high-value fish species, effectively improving the aquaculture quality and economic benefits.

[0130] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A deep water intake device for a marine fishery aquaculture vessel, comprising a pump, the pump being connected to a seawater storage tank or a breeding tank through a pipeline, characterized in that: It includes a water intake boom and a lifting device; a pump is arranged at one end of the water intake boom that enters the seawater, and a rotating pair is formed between the other end of the water intake boom or the upper end close to the other end and the upper end of the hull; A rolling part is arranged in the middle of the water intake cantilever to form a rolling pair between the rolling part and the hull; The rolling pair comprises a groove, which is arranged on the hull and is used for limiting the rolling part.

2. A deep water intake device for a marine fishery aquaculture vessel as claimed in claim 1, characterized in that: A moving pair is arranged between the rolling part and the water intake cantilever, so that the rolling pair moves relative to the water intake cantilever, and the moving direction is moving along the water intake cantilever; the rolling part is a roller or a spherical wheel.

3. A deep water intake device for a marine fishery aquaculture vessel as claimed in claim 2, characterized in that: The water intake boom (2) is a truss structure, comprising a water intake arm frame (5), a submersible pump (6), a water intake pipe (3), a hull connecting pipe (4), a temperature sensor (7), and a cable pipe (17); A submersible pump (6), a water intake pipe (3), a hull connecting pipe (4), a temperature sensor (7), and a cable pipe (17) are arranged in combination in a water intake arm frame (5); cables of the submersible pump (6) and the temperature sensor (7) are laid in the cable pipe (17); the water intake pipe (3), the hull connecting pipe (4), and the cable pipe (17) are fixed to the water intake arm frame (5) by means of a pipe clamp (8); and a friction-proof gasket (9) made of a flexible material is arranged at the fixing position of the pipe clamp (8) to protect the pipeline.

4. A deep water intake device for a marine fishery aquaculture vessel as claimed in claim 3, characterized in that: A guide roller (16) is installed on the water intake boom (2) at a side close to the hull (1).

5. A deep water intake device for a marine fishery aquaculture vessel as claimed in claim 4, characterized in that: At least one water intake boom (2) is arranged on both sides of a hull (1) along the length direction of the ship; a hull connecting pipe (4) at the upper part of the water intake boom (2) is connected to the hull (1) through a group of bearings (10), so that the water intake boom (2) can rotate around the bearings (10); the lower part of the water intake boom (2) is connected to a retractable winch (14) arranged on the deck of the hull (1) through a lifting rope (18), and the water intake boom (2) is lifted or lowered by the retractable winch (14) to adjust the water entry depth of the submersible pump (6); an arc-shaped guide groove (15) is arranged on the outer surface of the hull (1) to limit the lateral swing of the water intake boom (2) when it is lifted or lowered.

6. A deep water intake device for a marine fishery aquaculture vessel as claimed in claim 5, characterized in that: The water intake device is connected to the water inlet pipeline of the hull (1): the hull connecting pipe (4) at the upper part of the water intake boom (2) passes through the bearing (10) and is connected to one end of a flexible short pipe (11); the other end of the flexible short pipe (11) is connected to a water inlet pipe (13) of the work boat, and a water inlet valve (12) is installed on the water inlet pipe (13) of the work boat.

7. A deep water intake device for a marine fishery aquaculture vessel as claimed in claim 6, characterized in that: An arc-shaped guide groove (15) is provided on the outer plate of the hull (1) to prevent the guide roller (16) from being out of contact with the hull (1) and to limit the lateral swing of the water intake boom (2).

8. A deep water intake device for a marine fishery aquaculture vessel as claimed in claim 7, characterized in that: When the water intake boom (2) is in a fully lowered position, an auxiliary rope (19) is arranged at the lower part of the water intake boom (2) for assisting in fixing the water intake boom (2).

9. A method for deep water intake for a marine fishery aquaculture vessel, using the deep water intake device for a marine fishery aquaculture vessel according to any one of claims 1 to 8, characterized in that: When taking in water, the lifting rope (18) is released by the retractable winch (14), so that the water intake boom (2) is lowered, the water intake boom (2) rotates downward with the bearing (10) as the center, and the guide roller (16) on the water intake boom (2) moves downward along the guide groove (15) to limit the lateral swing of the water intake boom (2) during the descent process. The temperature sensor (7) at the end of the water intake boom (2) is used to feedback the seawater temperature in real time. When the detected seawater temperature is suitable, the retractable winch (14) stops lowering the lifting rope (18), and the hull connecting pipe (4) and the workboat water inlet pipe (13) are connected through the flexible short pipe (11); the water inlet valve (12) is opened, and the submersible pump (6) is started to start extracting low-temperature seawater; After the water intake operation is completed, the submersible pump (6) is stopped, the water inlet valve (12) is closed, the flexible short pipe (11) is removed, and the retracting winch (14) is started to recover the lifting rope (18), so that the water intake boom (2) rotates upward with the bearing (10) as the center, and the guide roller (16) on the water intake boom (2) moves upward along the guide groove (15) to limit the lateral swing of the water intake boom (2) during the rising process, until the water intake boom (2) returns to the storage position and is fixed, and the retracting winch (14) is stopped.

10. A method for deep water extraction for marine fishery aquaculture vessels as claimed in claim 9, characterized in that: The hull connecting pipe (4) and the workboat water inlet pipe (13) are connected via a flexible short pipe (11). When the water intake boom (2) is at different horizontal angles, the flexible short pipe (11) is adapted to the connection between the hull connecting pipe (4) and the workboat water inlet pipe (13) and to the slight rotation of the hull connecting pipe (4) caused by the swing of the water intake boom (2) during operation.

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