A ship-mounted net cage fishing device for nuclear power cold source marine organism fishing
Patent Information
- Application Number
- CN202621393954.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-04
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2036-09-04
AI Technical Summary
[0002]国内滨海核电厂冷源系统常因水母、毛虾、藻类等集群性浮游海生物大规模入侵取水口而面临堵塞风险，严重时可导致机组降负荷运行甚至非计划停堆，对核电安全与经济运行构成重大威胁
[0022]本实用新型的有益效果为：该装置中前端拦截组件通过纵向导流板和横向导向机构的配合，使网衣展开形成一个兼具拦截与导流功能的喇叭形区域，用于在船舶航行时主动拦截、高效汇聚并引导分散的海生物。中部捕捞网箱通过其冲孔钢板壁对水流进行过滤，允许海水通过而将海生物截留在由内部导流板分隔出的多个独立存储空间内，从而实现海生物的高效存储并防止堆积堵塞。
Smart Images
Figure CN224910454U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a shipborne net cage fishing device for harvesting marine organisms from nuclear power plant cold sources, belonging to the technical field of marine engineering. Background Technology
[0002] Domestic coastal nuclear power plants often face the risk of blockage in their cooling systems due to large-scale invasion of water intakes by swarms of planktonic marine organisms such as jellyfish, shrimp, and algae. In severe cases, this can lead to reduced load operation of the unit or even unplanned shutdown, posing a significant threat to the safety and economic operation of nuclear power.
[0003] Existing methods for harvesting such marine life, such as manual fishing, traditional trawls, or fixed interception nets, have revealed significant shortcomings when addressing the specific scenario of nuclear power plant cold source protection. Manual fishing is inefficient and high-risk; traditional nets suffer from low interception efficiency, susceptibility to clogging, inconvenient unloading, and inability to efficiently coordinate with modern intelligent vessels. Although net cages are widely used in marine aquaculture, their design and structure cannot meet the stringent requirements of efficient and continuous harvesting for nuclear power plant cold source protection. Utility Model Content
[0004] To address the problems existing in the prior art, this utility model provides a shipborne net cage fishing device for harvesting marine organisms from nuclear power plant cold sources. Through the coordinated work of its various components, it can automatically complete a series of continuous fishing operations, achieving continuous operation.
[0005] The technical solution adopted by this utility model is as follows: a shipborne net cage fishing device for harvesting marine organisms from nuclear power plant cold sources. The device is installed on a catamaran, with a deck on the top and two hulls on the left and right below. The shipborne net cage fishing device includes a lifting device, a front interception component, a net cage component, and an unloading component.
[0006] The lifting device is used for the raising and lowering of the front-end interception component. The self-locking winch in the lifting device is installed on the ship deck, and the wire rope is connected to the longitudinal guide plate after passing through the pulley.
[0007] The front-end interception assembly includes a longitudinal guide plate, a fixed limiting frame, a net, and a lateral guide mechanism. The fixed limiting frame is fixedly mounted on the hull, and the top of the longitudinal guide plate is hinged to the bottom of the fixed limiting frame. The lateral guide mechanism is mounted on a horizontal slide rail with a sliding seat and reciprocates along it. The net is disposed between the longitudinal guide plate and the lateral guide mechanism.
[0008] The cage assembly is used for catching and storing the catch, including a catching cage and a storage cage; the catching cage is fixedly connected to the fixed limiting frame, and the storage cage is fixedly connected to and communicates with the catching cage;
[0009] The unloading assembly uses a tail box, the front end of which is fixedly connected and communicates with the storage mesh box, and the rear end of the tail box is equipped with a tail door.
[0010] The front-end interception component is located at the bow of the catamaran, while the net cage component and unloading component are fixedly located in the area between the two hulls.
[0011] Furthermore, the end of the wire rope is connected to the guide plate connecting block of the longitudinal guide plate.
[0012] Furthermore, the fixed limiting frame includes a top frame and a side inclined frame;
[0013] The top edge of the longitudinal guide plate is inserted into the hinged support at the bottom of the side inclined frame. Under the action of the lifting device, the longitudinal guide plate moves in pitch and rotation around the top edge of the guide plate, thereby opening and closing the longitudinal guide plate.
[0014] Furthermore, the netting includes a fixed edge and a free edge. The fixed edge is fixed to the side of the guide plate; the free edge includes a side edge and a top edge. One end of the side edge is fixed to the bottom end of the side of the guide plate, and the other end is fixed to the sliding seat; one end of the top edge is fixed to the sliding seat, and the other end is fixed to the top fixing point of the fishing net cage.
[0015] Furthermore, the longitudinal guide plate is used to realize the longitudinal unfolding and retraction of the net; in the transverse guide mechanism, the horizontal slide rail is set on the bow side wall, and the sliding seat reciprocates along the horizontal slide rail to realize the transverse trumpet-shaped unfolding and retraction of the net.
[0016] Furthermore, the front side of the fishing cage is provided with an upwardly inclined side, which is fixedly connected to the bottom of the side frame; the inclined side and the top edge of the guide plate form a stepped opening to prevent the catch from flowing out of the cage.
[0017] Furthermore, the inclined side of the cage is at the same angle as the side frame, with an inclination angle of 15°-25°.
[0018] Furthermore, two sets of guide plates are symmetrically arranged inside the storage cage, forming a central guide port between the two sets of guide plates, and side guide ports are formed between the guide plates and the side wall of the storage cage; guide holes are evenly distributed on the guide plates, and the side wall of the storage cage is made of a water-permeable cage perforated plate.
[0019] Furthermore, the included angle between the two sets of guide plates is 110°-130°, the width of the central guide port is 1 / 6-1 / 5 of the width of the storage cage, and the width of the side guide ports is 1 / 7-1 / 6 of the width of the storage cage.
[0020] Furthermore, the top of the tailgate is hinged to the top of the tail box, the bottom of the tailgate is hinged to one end of the telescopic rod, and the other end of the telescopic rod is located at the bottom of the tail box; the extension and retraction of the telescopic rod controls the opening and closing of the tailgate.
[0021] Furthermore, the device also includes a controller, which is electrically connected to a self-locking winch, a telescopic boom, a sliding seat, and a full-load detector. The full-load detector is installed inside the storage cage to detect whether the storage cage is full.
[0022] The beneficial effects of this invention are as follows: The front-end interception component, through the cooperation of a longitudinal guide plate and a transverse guiding mechanism, allows the net to unfold and form a funnel-shaped area that combines interception and guidance functions. This area is used to actively intercept, efficiently gather, and guide dispersed marine organisms during ship navigation. The central fishing cage filters the water flow through its perforated steel plate wall, allowing seawater to pass through while trapping marine organisms in multiple independent storage spaces separated by internal guide plates, thereby achieving efficient storage of marine organisms and preventing accumulation and blockage.
[0023] When the net cages reach full capacity, the front-end interception components retract and close, ceasing fishing operations. Then, after the vessel reaches the discharge area, the unloading gate of the rear unloading components opens. At this point, the water flow passing through the net cages during vessel navigation quickly and thoroughly discharges the marine life stored within, completing one fishing cycle. Through the functional linkage of these components, this device achieves an automated operational cycle from flow guidance, filtration, storage, and discharge, eliminating the need for frequent manual intervention and thus meeting the stringent requirements of continuous and efficient operation for nuclear power plant cold source protection.
[0024] This device can efficiently intercept and harvest large-scale, high-density clusters of planktonic marine organisms, while also possessing anti-clogging and rapid unloading capabilities; it can operate continuously to ensure the safe and stable operation of nuclear power plant cold source systems. Attached Figure Description
[0025] Figure 1 This is a three-dimensional structural diagram of a shipborne net cage fishing device (excluding lifting device) for harvesting marine organisms from nuclear power plant cold sources.
[0026] Figure 2 This is a top view below the deck of a shipborne net cage fishing device used for harvesting marine life from nuclear power plant cold sources.
[0027] Figure 3 This is a rear view of a shipborne net cage fishing device used for harvesting marine life from nuclear power plant cold sources.
[0028] Figure 4 This is a side view (in unfolded state) of a shipborne net cage fishing device used for harvesting marine life from nuclear power plant cold sources.
[0029] Figure 5 This is a side view (in the retracted state) of a shipborne net cage fishing device used for harvesting marine life from nuclear power plant cold sources.
[0030] Figure 6 This is a diagram of the internal structure of the storage cage and tail box.
[0031] Figure 7 This is a structural diagram of the deflector.
[0032] In the diagram: 1. Hinged support; 2. Longitudinal guide plate; 2a. Top edge of guide plate; 2b. Side edge of guide plate; 2c. Bottom edge of guide plate; 2d. Guide plate connecting block; 3. Fixed limiting frame; 3a. Top frame; 3b. Side inclined frame; 4. Lifting device; 4a. Self-locking winch; 4b. Pulley; 4c. Wire rope; 5. Fishing cage; 5a. Inclined side of cage; 5b. Top fixing point of cage; 6. Storage cage; 6a. Guide plate; 6b. Guide hole; 6c. Perforated plate of cage; 6d. Side guide port; 6e. Central guide port; 7. Tail box; 7a. Tail door; 7b. Telescopic rod; 8. Net; 8a. Side of net; 8b. Top edge of net; 9. Horizontal slide rail; 10. Sliding seat; 11. Hull; 12. Deck; 12a. Bow sidewall. Detailed Implementation
[0033] The present invention will be specifically described below through embodiments. It should be noted that the following embodiments are only applicable to further explaining the present invention, but are not limited thereto, unless otherwise stated.
[0034] The specific embodiments of this utility model are described in detail below with reference to the technical solution:
[0035] This utility model discloses a shipborne cage fishing device integrated into the bow of the operating vessel. Its core component is a dynamically adjustable rigid flow-guiding filter structure. The device uses the hull as the installation base and load-bearing body, and its core components include a front interception assembly, a mid-section rigid fishing cage, and a rear unloading assembly.
[0036] A shipborne cage fishing device for harvesting marine organisms from nuclear power plant cold sources is provided. The device is installed on a catamaran, with a deck 12 on top and two hulls 11 on the bottom. The shipborne cage fishing device includes a lifting device 4, an end interception assembly, a cage assembly, and an unloading assembly.
[0037] The lifting device is used to control the vertical depth of the fishing inlet. Its fixed end is installed on the deck, and its actuating end is hinged to the longitudinal guide plate via a pulley block. The longitudinal guide plate is a single-piece structure, which is connected to a hinge support fixed to the bottom of the bow via a hinge shaft, forming a rotary kinematic pair, allowing the longitudinal guide plate to perform pitch and rotation around the hinge support. Specifically, the lifting device 4 is used for the raising and lowering of the front interception component. The self-locking winch 4a in the lifting device 4 is installed on the deck 12. The wire rope 4c passes through the pulley 4b and its end is fixedly connected to the guide plate connecting block 2d of the longitudinal guide plate 2. The guide plate connecting block 2d is located at the bottom edge 2c of the guide plate. When the wire rope 4c is wound up or down, it drives the longitudinal guide plate 2 to be wound up or down.
[0038] The front-end interception assembly can automatically, continuously, and efficiently intercept and harvest planktonic marine organisms. The front-end interception assembly includes a longitudinal guide plate 2, a fixed limiting frame 3, a net 8, and a lateral guide mechanism. The fixed limiting frame 3 is fixedly mounted on the hull 11 and includes a top frame 3a and a side frame 3b. The top of the longitudinal guide plate 2 is hinged to the bottom of the fixed limiting frame 3. The end of the top edge 2a of the longitudinal guide plate 2 is inserted into the hinged support 1 at the bottom of the side frame 3b. Under the action of the lifting device 4, the longitudinal guide plate 2 performs pitch and rotation movements around the top edge 2a, realizing the opening and closing of the longitudinal guide plate 2. The core of the longitudinal guide plate body is a spatial frame welded from stainless steel square tubes, providing the main mechanical strength. The frame is covered with perforated stainless steel plates, giving it structural strength, efficient flow guidance, and primary filtration capabilities.
[0039] To enable active adjustment of the fishing opening width, horizontal rails are fixedly installed on the bow sidewalls (above the waterline) on both sides of the catamaran, extending horizontally along the longitudinal direction of the hull. Sliding seats are mounted on these rails. A drive mechanism drives the sliding seats to reciprocate linearly along the horizontal rails, thereby expanding the net outwards on the port and starboard sides or retracting it inwards, thus precisely adjusting the fishing opening width of the forward interception assembly. The horizontal rails are made of heavy-duty stainless steel linear guides, and the sliding seats are equipped with self-lubricating bearings. Protective covers are installed on the rails and drive mechanism to prevent marine organisms from attaching.
[0040] The transverse guiding mechanism uses a sliding seat 10 mounted on a horizontal slide rail 9 and reciprocating along it. The net 8 is positioned between the longitudinal guide plate 2 and the transverse guiding mechanism. The net 8 includes a fixed side and a free side. The fixed side is fixed to the side 2b of the guide plate; the free side includes a side 8a and a top 8b. One end of the side 8a is fixed to the bottom end of the side 2b of the guide plate (which is also the end of the bottom edge 2c of the guide plate), and the other end is fixed to the sliding seat 10. One end of the top 8b is fixed to the sliding seat 10, and the other end is fixed to the top fixing point 5b of the fishing net cage 5. The longitudinal guide plate 2 is used to achieve the longitudinal unfolding and retraction of the net. In the transverse guiding mechanism, the horizontal slide rail 9 is mounted on the bow sidewall 12a, and the sliding seat 10 reciprocates along the horizontal slide rail 9 to achieve the transverse flared unfolding and retraction of the net 8.
[0041] The net cage assembly is located in the middle area of the catamaran, directly connected to the front interception assembly, and is the storage core of the device. The net cage assembly is used for catching and storing the catch, and includes a catching net cage 5 and a storage net cage 6. The catching net cage 5 is fixedly connected to the fixed limiting frame 3, and the storage net cage 6 is fixedly connected to and communicates with the rear of the catching net cage 5. The front side of the catching net cage 5 communicates with the space enclosed by the longitudinal guide plate 2 and the net 8. The front side of the catching net cage 5 has an upwardly inclined side 5a, which is fixedly connected to the bottom of the side inclined frame 3b. The inclined side 5a and the top edge 2a of the guide plate form a stepped opening to prevent the catch from flowing out of the cage. The inclined angle of the inclined side 5a and the side inclined frame 3b is the same, which is 19°.
[0042] Two sets of guide plates 6a are symmetrically arranged inside the storage cage 6, forming a central guide port 6e between the two sets of guide plates 6a, and side guide ports 6d between the guide plates 6a and the side wall of the storage cage; guide holes 6b are evenly distributed on the guide plates 6a (e.g., Figure 7 As shown, the diameter is 100mm), and the side wall of the storage cage is made of a permeable mesh plate 6c. The included angle between the two sets of guide plates 6a is 120°, the width of the central guide port 6e is 1 / 6 to 1 / 5 of the width of the storage cage, and the width of the side guide port 6d is 1 / 7 to 1 / 6 of the width of the storage cage.
[0043] The front end of the fishing cage connects to the side of a longitudinal baffle plate, while the rear end connects to a storage cage. The storage cage contains multiple baffle plates extending along its length. These baffles divide the interior of the storage cage into several independent longitudinal storage channels. At the entrance of each storage channel, a unidirectional flow-guiding structure allows water and marine life to enter the channel in the correct direction, while effectively preventing backflow. The fishing cage and storage cage consist of a rigid keel frame welded from high-strength steel. Perforated steel plate filter walls are fixed to the frame, effectively trapping marine life and significantly reducing water flow resistance.
[0044] The unloading assembly uses a tail box 7. The front end of the tail box 7 is fixedly connected and communicates with the storage net box 6. The rear end of the tail box 7 is provided with a tail door 7a. The top of the tail door 7a is hinged to the top of the tail box 7, and the bottom of the tail door 7a is hinged to one end of the telescopic rod 7b. The other end of the telescopic rod 7b is located at the bottom of the tail box 7. The extension and retraction of the telescopic rod 7b controls the opening and closing of the tail door 7a.
[0045] The unloading assembly, located at the rear of the storage cage, is crucial for continuous operation. Its core function is to quickly clear the marine organisms trapped inside the cages, preventing storage congestion and supporting unmanned operation around the clock. It mainly consists of a tailgate driven by a telescopic boom. Its operation utilizes the water flow passing through the cages as the ship navigates to quickly and thoroughly flush out the marine organisms.
[0046] The front-end interception component is located at the bow of the catamaran, while the net cage component and the unloading component are fixedly located in the area between the two hulls.
[0047] The device also includes a controller that is electrically connected to a self-locking winch 4a, a telescopic boom 7b, a sliding seat 10, and a full-load detector. The full-load detector is installed inside the storage cage 6 and can use an underwater camera and sonar sensor to monitor the fullness of marine life in the storage cage, providing a trigger signal for subsequent actions in the fishing operation.
[0048] The controller receives signals from the full-load detector and sends control signals to the self-locking winch 4a, telescopic boom 7b, and sliding seat 10, which are electrically connected to it, according to a preset program. It controls the start and stop of the self-locking winch 4a, which in turn drives the longitudinal guide plate 2 to pitch via a wire rope-pulley mechanism; it controls the reciprocating motion of the sliding seat 10 along the horizontal slide rail to open or close the netting. It controls the extension and retraction of the telescopic boom 7b to open and close the tailgate 7a.
[0049] When using the above technical solution, the following steps are included:
[0050] Step 1, Initial retracted state: The device is initially in a retracted position above the bow deck. At this time, the self-locking winch 4a is in a locked state.
[0051] Step 2: The self-locking winch 4a in the lifting device 4 is unlocked, the wire rope 4c is released, and the longitudinal guide plate 2 rotates downward around the bottom hinge support 1 under the action of gravity, so that it sinks into the water to the preset depth, and the self-locking winch 4a is locked.
[0052] Step 3: When the longitudinal guide plate 2 descends to the preset depth, the drive sliding seat 10 moves outward along the horizontal slide rail 9. The sliding seat 10 drives the side edge 8a and top edge 8b of the net 8 to rotate horizontally outward to the left and right sides, so as to form the funnel-shaped fishing mouth of the net 8.
[0053] Step 4: When the catamaran is sailing, the water flow and marine life in front are actively gathered by the funnel-shaped guide structure. The catch enters the fishing cage 5 through the stepped opening, is guided to the fishing cage 5 and then enters the storage cage 6 behind it. When the water flow slows down or the ship turns, the stepped opening can also prevent the catch in the cage from flowing back.
[0054] Step 5: The storage cage 6 features an anti-backflow design. Inside the cage are multiple horizontally positioned guide plates 6a extending in the direction of water flow. The central guide port 6e and side guide ports 6d of each channel have a unidirectional flow structure, allowing water and marine life to enter smoothly. However, when the water flow slows or the vessel turns, this structure effectively prevents marine life from flowing backwards. Simultaneously, the narrow structure of the channel itself increases resistance to backflow, ensuring that the catch only enters and does not retreat, thus improving storage efficiency.
[0055] Step 6: When the monitoring system detects that the storage cage 6 is close to full load, it sends a signal to retract the net 8 and the longitudinal guide plate 2. The drive sliding seat 10 moves along the horizontal slide rail 9 towards the inside of the ship, causing the net 8 to retract inward; the self-locking winch 4a is released, the wire rope 4c is retracted, and the longitudinal guide plate 2 is retracted to the fixed limit frame 3, and then the self-locking winch 4a is locked again.
[0056] Step 7: The vessel, fully loaded with equipment, sails to the designated safe discharge area. Upon arrival at the discharge area, the control system instructs the unloading assembly to operate. The telescopic boom 7b extends, pushing the stern door 7a to open sternward around its hinge axis.
[0057] Step 8: The vessel maintains a low speed, with water flowing into the cage from the front, flushing and discharging the organisms; it then flows out at high speed from the opened stern gate 7a. This water flow thoroughly flushes and carries all marine life stored in the cage 6 out of the cage, completing the discharge process.
[0058] Step 9: After discharge is complete, the telescopic boom 7b retracts, and the tailgate 7a is closed and locked. The device returns to standby status and can immediately begin the next work cycle. The entire unloading process does not require a screw conveyor or pumping device.
[0059] The device's trumpet-shaped rigid flow guiding structure is designed based on fluid dynamics principles. It can expand the frontal cross section and form a converging flow guiding channel. By changing the velocity gradient, it gathers the dispersed plankton and guides them to the collection cage at the rear, resulting in a harvesting efficiency far higher than that of passive interception.
[0060] The perforated stainless steel baffle plate and monofilament mesh provide a smooth surface to avoid cutting organisms; some water flows through the holes and washes the surface, and combined with the internal flow-diverting compartment design of the cage, it effectively prevents blockage.
[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A shipborne net cage harvesting device for harvesting marine organisms from nuclear power plant cold sources, the device being mounted on a catamaran, with a deck (12) on top and two hulls (11) on the bottom; characterized in that: The shipborne cage fishing device includes a lifting device (4), a front interception assembly, a cage assembly, and an unloading assembly; The lifting device (4) is used for the lifting and lowering of the front interception component. The self-locking winch (4a) in the lifting device (4) is set on the ship deck (12), and the wire rope (4c) is connected to the longitudinal guide plate (2) after passing through the pulley (4b). The front-end interception assembly includes a longitudinal guide plate (2), a fixed limiting frame (3), a net (8), and a transverse guide mechanism. The fixed limiting frame (3) is fixedly mounted on the hull (11), and the top of the longitudinal guide plate (2) is hinged to the bottom of the fixed limiting frame (3). The transverse guide mechanism uses a sliding seat (10) mounted on a horizontal slide rail (9) and reciprocates along it. The net (8) is positioned between the longitudinal guide plate (2) and the transverse guide mechanism. The cage assembly is used for catching and storing the catch, including a catching cage (5) and a storage cage (6); the catching cage (5) is fixedly connected to the fixed limiting frame (3), and the storage cage (6) is fixedly connected to and communicates with the catching cage (5); The unloading assembly uses a tail box (7), the front end of which is fixedly connected to and communicates with the storage net box (6), and the rear end of the tail box (7) is provided with a tail door (7a). The front-end interception component is located at the bow of the catamaran, and the net cage component and the unloading component are fixedly located in the area between the two hulls (11).
2. The shipborne net cage harvesting device for harvesting marine organisms from nuclear power plant cold sources according to claim 1, characterized in that: The end of the wire rope (4c) is connected to the guide plate connecting block (2d) of the longitudinal guide plate (2).
3. The shipborne net cage harvesting device for harvesting marine organisms from nuclear power plant cold sources according to claim 2, characterized in that: The fixed limiting frame (3) includes a top frame (3a) and a side inclined frame (3b); The end of the top edge (2a) of the longitudinal guide plate (2) is inserted into the hinge support (1) at the bottom of the side inclined frame (3b). Under the action of the lifting device (4), the longitudinal guide plate (2) moves in pitch and rotation around the top edge (2a) of the guide plate, thereby opening and closing the longitudinal guide plate (2).
4. A shipborne net cage harvesting device for harvesting marine organisms from nuclear power plant cold sources according to claim 3, characterized in that: The net (8) includes a fixed side and a free side. The fixed side is fixed to the side (2b) of the guide plate. The free side includes the side (8a) of the net and the top (8b) of the net. One end of the side (8a) of the net is fixed to the bottom end of the side (2b) of the guide plate, and the other end is fixed to the sliding seat (10). One end of the top (8b) of the net is fixed to the sliding seat (10), and the other end is fixed to the top fixing point (5b) of the fishing net cage (5).
5. A shipborne net cage harvesting device for harvesting marine organisms from nuclear power plant cold sources according to claim 4, characterized in that: The longitudinal guide plate (2) is used to realize the longitudinal unfolding and retraction of the net; in the transverse guide mechanism, the horizontal slide rail (9) is set on the bow side wall (12a), and the sliding seat (10) moves back and forth along the horizontal slide rail (9) to realize the transverse trumpet-shaped unfolding and retraction of the net (8).
6. A shipborne net cage harvesting device for harvesting marine organisms from nuclear power plant cold sources according to claim 5, characterized in that: The front side of the fishing cage (5) is provided with an upwardly inclined cage side (5a), and the cage side (5a) is fixedly connected to the bottom of the side inclined frame (3b); the cage side (5a) and the top edge (2a) of the guide plate form a stepped opening to block the outflow of the catch inside the cage. The inclined side (5a) of the cage has the same inclination angle as the side inclined frame (3b), with an inclination angle of 15°-25°.
7. A shipborne net cage harvesting device for harvesting marine organisms from nuclear power plant cold sources according to claim 6, characterized in that: Two sets of guide plates (6a) are symmetrically arranged inside the storage cage (6), forming a central guide port (6e) between the two sets of guide plates (6a), and a side guide port (6d) is formed between the guide plate (6a) and the side wall of the storage cage; guide holes (6b) are evenly distributed on the guide plate (6a), and the side wall of the storage cage is made of a water-permeable cage perforated plate (6c).
8. A shipborne net cage harvesting device for harvesting marine organisms from nuclear power plant cold sources according to claim 5, characterized in that: The included angle between the two sets of guide plates (6a) is 110°-130°, the width of the central guide port (6e) is 1 / 6-1 / 5 of the width of the storage cage, and the width of the side guide port (6d) is 1 / 7-1 / 6 of the width of the storage cage.
9. A shipborne net cage harvesting device for harvesting marine organisms from nuclear power plant cold sources according to claim 8, characterized in that: The top of the tailgate (7a) is hinged to the top of the tail box (7), and the bottom of the tailgate (7a) is hinged to one end of the telescopic rod (7b). The other end of the telescopic rod (7b) is located at the bottom of the tail box (7). The extension and retraction of the telescopic rod (7b) controls the opening and closing of the tailgate (7a).
10. A shipborne net cage harvesting device for harvesting marine organisms from nuclear power plant cold sources according to claim 8, characterized in that: The device also includes a controller that is electrically connected to a self-locking winch (4a), a telescopic boom (7b), a sliding seat (10), and a full load detector. The full load detector is installed inside the storage cage (6) to detect whether the storage cage is full.