A multi-mesh bag type fishing net lifting adjusting mechanism for euphausia superba fishing

Abstract

This invention relates to the field of krill fishing equipment technology, and discloses a multi-bucket type fishing net lifting and adjusting mechanism for Antarctic krill fishing. The mechanism includes a hull, a cable winch fixedly connected to the top of the hull, a cable sleeved on the outer wall of the cable winch, and a trawl winch fixedly connected to the top of the hull. Addressing the problem of slow krill net lifting and lowering speed, a floating component is installed inside the equipment. When it is necessary to lift the krill net upwards, the power to the waterproof hydraulic pump is turned on, causing the pump to rotate forward and forcing the seawater accumulated inside the metal float to be discharged. Simultaneously, the exhaust pipe on the side wall of the metal float introduces high-pressure gas into the float, making the gas level inside the float greater than the seawater level. When there is sufficient air inside the metal float, it generates buoyancy, lifting the end of the krill net upwards. The application of this component effectively accelerates the rate of krill net depth adjustment.

Description

Technical Field

[0001] This invention relates to the field of krill fishing equipment technology, specifically to a lifting and adjusting mechanism for a multi-net bag type fishing net used for Antarctic krill fishing. Background Technology

[0002] Antarctic krill are distributed over an area of ​​18.4 million km² in Antarctica. 2 The Antarctic krill reserves in the region amount to 3 billion tons, with a catchable amount of 100 million tons. The annual catch limit is generally maintained at around 900,000 tons, while the global actual annual catch does not exceed 200,000 tons, and China's does not exceed 30,000 tons. The annual catch is mainly limited by the fishing methods. Currently, there are two main methods for catching Antarctic krill: traditional beam trawls and traditional sheet trawls. Beam trawls are more efficient than sheet trawls, yielding a larger daily catch, but both methods have drawbacks.

[0003] Both side-beam trawls and plate trawls require frequent net raising and lowering. In addition, traditional side-beam trawls are not suitable for deep trawls, and traditional plate trawls are not suitable for surface trawls. This makes it impossible to quickly adjust the fishing net according to the specific location of the krill. To address the above problems, the following solutions are proposed. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a multi-bag type lifting and adjusting mechanism for Antarctic krill fishing, comprising a hull, a cable winch fixedly connected to the top of the hull, a cable sleeved on the outer wall of the cable winch, a trawl winch fixedly connected to the top of the hull, a trawl wire sleeved on the outer wall of the trawl winch, a towing winch fixedly connected to the top of the hull, a towing wire sleeved on the outer wall of the towing winch, and further comprising:

[0005] The collection mechanism is fixedly installed at the end of the trawl wire away from the trawl winch.

[0006] The regulating mechanism is fixedly installed on the outer wall of the collecting mechanism;

[0007] The limiting mechanism is fixedly installed on the inner wall of the collecting mechanism;

[0008] Before use, the collection mechanism needs to be thrown into the sea, and the extension length of the trawl wire is controlled by the trawl winch to ensure that the collection mechanism and the regulating mechanism can catch krill on the seabed.

[0009] Preferably, the collection institutions include:

[0010] The positioning component is fixedly installed at the end of the trawl wire away from the trawl winch.

[0011] The fishing component is fixedly mounted on the side wall of the positioning component;

[0012] As the vessel moves forward, the positioning component will drive the fishing component to perform fishing operations at a designated height.

[0013] Preferably, the adjustment mechanism includes:

[0014] The collection component is fixedly installed at the end of the fishing component away from the trawl wire.

[0015] The floating component is fixedly installed on the side wall of the positioning component;

[0016] When the fishing assembly catches krill, the collection assembly generates a suction force to discharge the krill inside the fishing assembly toward the hull.

[0017] Preferably, the limiting mechanism includes:

[0018] Auxiliary components are fixedly installed on the inner wall of the fishing assembly;

[0019] The reinforcing component is fixedly installed on the outer wall of the fishing component.

[0020] The auxiliary components will detect the specific conditions of the seabed, and the interior of the hull is equipped with a backwash pump, solenoid valve one, solenoid valve two, solenoid valve three and related pipelines to form a backwash system.

[0021] Preferably, the positioning component includes a pull plate fixedly connected to the end of the trawl wire away from the trawl winch, a cable fixedly connected to the side wall of the pull plate, and a rubber ring fixedly connected to the end of the cable away from the pull plate.

[0022] Among them, the rubber ring is a soft material that will deform when subjected to pressure;

[0023] The fishing assembly includes a krill net fixedly connected to the side wall of a rubber ring, a soft ring fixedly connected to the end of the krill net away from the rubber ring, and a filter plate fixedly connected to the end of the soft ring away from the krill net.

[0024] Under normal circumstances, the krill net is in a closed state. When the ship is sailing, the seawater passes through the krill net, causing the krill net to expand and the rubber rings to expand outward.

[0025] Preferably, the collection component includes a mesh bag fixedly connected to the side wall of the filter plate, a flexible tube 1 fixedly connected to the side wall of the mesh bag, a shrimp suction pump fixedly connected to the end of the flexible tube 1 away from the mesh bag, and a flexible tube 2 fixedly connected to the side wall of the shrimp suction pump.

[0026] The end of the towing wire away from the towing winch is fixedly connected to the side wall of the shrimp suction pump.

[0027] Preferably, the floating assembly includes several metal floats fixedly connected to the sidewall of the rubber ring, a corrugated pipe is connected through the several metal floats, and a waterproof hydraulic pump is fixedly connected to the inner wall of the corrugated pipe.

[0028] The outer wall of the topmost metal float is connected to an exhaust pipe. When the height of the collection mechanism needs to be adjusted, a waterproof hydraulic pump will draw in external seawater to fill the metal float, or discharge the seawater inside the metal float to the outside.

[0029] Preferably, the auxiliary component includes a fixing frame fixedly connected to the inner wall of the soft ring, a sensor one fixedly connected to the side wall of the fixing frame, a sensor two fixedly connected to the side wall of the pulling plate, and a cable one fixedly connected to the side wall of the sensor two.

[0030] The end of cable one that is furthest from sensor two is fixedly connected to the side wall of sensor one, and the side wall of sensor two is fixedly connected to cable.

[0031] Preferably, the reinforcing component includes a second corrugated pipe fixedly connected to the side wall of the krill net, and a horn tube fixedly connected to the side wall of the second corrugated pipe, with the outer wall of the horn tube fixedly connected to the outer wall of the corrugated pipe.

[0032] During ship navigation, the flowing seawater will enter the inner wall of the second bellows through the horn pipe, causing the second bellows to deform.

[0033] Preferably, a hydraulic hose is fixedly connected to the top of the hull, a hydraulic hose winch is fixedly connected to the side wall of the hydraulic hose, a hose connection device is fixedly connected to the end of the hose away from the shrimp suction pump, and a hose winch is fixedly connected to the top of the hull.

[0034] The hose connection device is a fixed structure with a quick-connect flange, welded to the deck. One end is connected to the hose, and the other end is connected to the cabin through a stainless steel pipe and connected to the spiral drainer.

[0035] The present invention has the following beneficial effects:

[0036] (1) To address the problem of slow adjustment speed of krill nets, this invention incorporates a floating component inside the device. When the krill net needs to be lifted, the power to the waterproof hydraulic pump is switched on, causing it to rotate in the forward direction and forcing the seawater accumulated inside the metal float to be discharged. Simultaneously, the exhaust pipe on the side wall of the metal float introduces high-pressure gas into the float, making the gas level inside the float greater than the seawater level. The seawater and air inside the float can circulate through the corrugated pipe. When there is sufficient air inside the float, it generates buoyancy and lifts the end of the krill net upward. When the krill net needs to be submerged, the waterproof hydraulic pump rotates in the reverse direction, forcing the seawater to enter the corrugated pipe. As the seawater fills the metal float, the weight of the collection mechanism, adjustment mechanism, and limiting mechanism forces the krill net to submerge rapidly. The application of the above components effectively accelerates the rate of krill net depth adjustment.

[0037] (2) This invention utilizes the characteristic that seawater will quickly pass through the outer wall of the krill net when the hull propels it. When the height of the krill net needs to be adjusted, the speed of the hull will be increased. A reinforcing component is installed inside the equipment. When the rapidly flowing seawater passes through the trumpet tube, the inlet of the trumpet tube is wider and the outlet is narrower. This causes the seawater to form a high-pressure state after passing through the trumpet tube. The corrugated pipe is a hollow flexible tube. The seawater will eventually be discharged outward at the tail of the corrugated pipe. When the high-pressure seawater enters the corrugated pipe, the connection between the corrugated pipe and the trumpet tube will be taut due to the high pressure. Through the application of the above components, when the height of the equipment is adjusted, the taut corrugated pipe will effectively increase the bending resistance of the outer wall of the krill net. This prevents the krill net from being folded too much at the rubber ring position due to the resistance of seawater when it moves up and down, causing the krill net to block the rubber ring and affecting the krill collection efficiency.

[0038] (3) The present invention adopts a method of continuous extraction of the fishing component by the collection component, which changes the conventional method of frequently casting and hauling nets. This avoids the krill from being crushed due to excessive pressure on the edge of the net and the stress position during the hauling process because of the excessive weight of seawater and seafood. This would affect the quality of the krill.

[0039] (4) The present invention can continue to operate continuously for a month or longer through continuous pumping and suction fishing. Unless there is a major malfunction or the krill population is completely harvested, no operation is required on the deck during the pumping and suction period. The crew only needs to monitor the fishing process and adjust the ship's position in the wheelhouse. The winch on the deck does not need to be operated during this period, which greatly reduces the labor intensity of the crew. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the overall structure and working state of the present invention;

[0042] Figure 2 This is a schematic diagram of the hull of the present invention;

[0043] Figure 3 This is a cross-sectional schematic diagram of the fishing component of the present invention;

[0044] Figure 4 This is a schematic diagram of the reinforcing components of the present invention;

[0045] Figure 5 This is a schematic diagram of the explosion of the floating component of the present invention;

[0046] Figure 6 This is a partial schematic diagram of the auxiliary components of the present invention;

[0047] Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle;

[0048] Figure 8 For the present invention Figure 6 Enlarged diagram of point B in the middle.

[0049] The attached diagram lists the components represented by each number as follows:

[0050] In the diagram: 1. Collection mechanism; 11. Positioning component; 12. Fishing component; 13. Hull; 14. Cable winch; 15. Cable; 16. Trawl winch; 17. Trawl wire; 18. Towing winch; 19. Towing wire; 23. Hydraulic hose winch; 24. Hydraulic hose; 25. Hose connection device; 26. Hose winch; 111. Pull plate; 112. Cable; 113. Rubber ring; 121. Krill net; 122. Flexible ring; 123. Filter 1. Plate; 2. Adjustment mechanism; 21. Collection assembly; 22. Floating assembly; 211. Net bag; 212. Hose one; 213. Shrimp suction pump; 214. Hose two; 221. Metal float; 222. Corrugated pipe; 223. Waterproof hydraulic pump; 3. Restriction mechanism; 31. Auxiliary assembly; 32. Reinforcing assembly; 311. Fixing frame; 312. Sensor one; 313. Cable one; 314. Sensor two; 321. Horn tube; 322. Corrugated pipe two. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] Example 1, please refer to Figures 1-6 This invention relates to a multi-bag type lifting and adjusting mechanism for Antarctic krill fishing, comprising a hull 13, a cable winch 14 fixedly connected to the top of the hull 13, a cable 15 sleeved on the outer wall of the cable winch 14, a trawl winch 16 fixedly connected to the top of the hull 13, a trawl wire 17 sleeved on the outer wall of the trawl winch 16, and a towing winch 18 fixedly connected to the top of the hull 13, a towing wire 19 sleeved on the outer wall of the towing winch 18, and further comprising:

[0053] Collection mechanism 1 is fixedly installed at the end of the trawl wire 17 away from the trawl winch 16;

[0054] Adjustment mechanism 2 is fixedly installed on the outer wall of collection mechanism 1;

[0055] The limiting mechanism 3 is fixedly installed on the inner wall of the collecting mechanism 1;

[0056] Before use, the collection mechanism 1 needs to be thrown into the sea, and the extension length of the trawl wire 17 is controlled by the trawl winch 16 to ensure that the collection mechanism 1 and the regulating mechanism 2 can catch krill on the seabed.

[0057] Collection agency 1 includes:

[0058] Positioning component 11 is fixedly installed at the end of the trawl wire 17 away from the trawl winch 16;

[0059] The fishing component 12 is fixedly installed on the side wall of the positioning component 11;

[0060] When the hull 13 is moving forward, the positioning component 11 will drive the fishing component 12 to carry out fishing operations at a designated height.

[0061] Adjustment mechanism 2 includes:

[0062] Collection component 21 is fixedly installed at the end of the fishing component 12 away from the trawl wire 17;

[0063] The floating component 22 is fixedly installed on the side wall of the positioning component 11;

[0064] When the fishing component 12 is fishing for krill, the collecting component 21 will generate a suction force to discharge the krill inside the fishing component 12 toward the hull 13.

[0065] Restricted agency 3 includes:

[0066] Auxiliary component 31 is fixedly installed on the inner wall of the fishing component 12;

[0067] Reinforcing component 32 is fixedly installed on the outer wall of the fishing component 12;

[0068] Among them, the auxiliary component 31 will detect the specific conditions of the seabed, and the hull 13 is equipped with a backwash pump, solenoid valve one, solenoid valve two, solenoid valve three and related pipelines to form a backwash system.

[0069] Example 2, please refer to Figures 3-8 The present invention is a lifting and adjusting mechanism for a multi-bag type fishing net for Antarctic krill fishing. Based on Example 1, the positioning component 11 includes a pull plate 111 fixedly connected to the end of the trawl wire 17 away from the trawl winch 16, a cable 112 fixedly connected to the side wall of the pull plate 111, and a rubber ring 113 fixedly connected to the end of the cable 112 away from the pull plate 111.

[0070] Among them, the rubber ring 113 is a soft material that will deform when subjected to pressure;

[0071] The fishing assembly 12 includes a krill net 121 fixedly connected to the side wall of the rubber ring 113. A soft ring 122 is fixedly connected to the end of the krill net 121 away from the rubber ring 113, and a filter plate 123 is fixedly connected to the end of the soft ring 122 away from the krill net 121.

[0072] Under normal conditions, the krill net 121 is in a retracted state. When the hull 13 is sailing, the seawater passes through the krill net 121, causing the krill net 121 to expand, which in turn causes the rubber ring 113 to expand outward.

[0073] The collection component 21 includes a mesh bag 211 fixedly connected to the side wall of the filter plate 123. A hose 212 is fixedly connected to the side wall of the mesh bag 211. A shrimp suction pump 213 is fixedly connected to the end of the hose 212 away from the mesh bag 211. A hose 214 is fixedly connected to the side wall of the shrimp suction pump 213.

[0074] The crew controls the remote monitoring system via the cab, displaying data and images. Combined with the fish finder system on the fishing vessel, once the krill net 121 enters the krill swarm, the suction pump 213 is activated to begin efficient, continuous pumping and dredging operations. Since the krill swarm has poor swimming ability, the remaining length of the flexible hose 212 when released is sufficient for adjusting the net's position. This pumping system can operate continuously in waters ranging from 30m to 200m in depth, adapting to krill harvesting at different water depths.

[0075] The floating assembly 22 includes several metal floats 221 fixedly connected to the side wall of the rubber ring 113, and a corrugated pipe 222 is connected through the several metal floats 221. A waterproof hydraulic pump 223 is fixedly connected to the inner wall of the corrugated pipe 222.

[0076] To address the issue of slow vertical adjustment speed of the krill net 121, a floating component 22 is installed inside the device. When it is necessary to lift the krill net 121 upwards, the power to the waterproof hydraulic pump 223 is turned on, causing the pump to rotate forward and forcing the seawater accumulated inside the metal float 221 to be expelled. Simultaneously, the vent pipe on the side wall of the metal float 221 introduces high-pressure gas into the float 221, making the gas volume inside the float 221 greater than the seawater volume. The seawater and air inside the metal float 221 can interact through the corrugated pipe 222. When there is enough air inside the metal float 221, the metal float 221 will generate buoyancy and cause the end of the krill net 121 to float upward. When the krill net 121 needs to submerge, the waterproof hydraulic pump 223 rotates in the opposite direction and forces the external seawater into the bellows 222 through the waterproof hydraulic pump 223. As the seawater fills the metal float 221, the weight of the collection mechanism 1, the adjustment mechanism 2 and the limiting mechanism 3 will force the krill net 121 to submerge quickly. Through the application of the above components, the speed of adjusting the depth of the krill net 121 is effectively accelerated.

[0077] The auxiliary component 31 includes a fixing frame 311 fixedly connected to the inner wall of the soft ring 122, a sensor 312 fixedly connected to the side wall of the fixing frame 311, a sensor 314 fixedly connected to the side wall of the tension plate 111, and a cable 313 fixedly connected to the side wall of the sensor 314.

[0078] When a pump malfunctions, such as the shrimp suction pump 213, the towing winch 18 retracts the towing wire 19 and hoists the pump body to the deck operating area for troubleshooting. Other equipment in the pump suction fishing system does not need to be operated, which greatly reduces the complexity of maintenance and the workload of the crew, while also saving time. After the malfunction is resolved, the pump body is hoisted into the sea, the shrimp suction pump 213 is started, and continuous pump suction fishing operations can continue.

[0079] The reinforcing component 32 includes a corrugated pipe 222 fixedly connected to the side wall of the krill net 121. A trumpet pipe 321 is fixedly connected to the side wall of the corrugated pipe 222, and the outer wall of the trumpet pipe 321 is fixedly connected to the outer wall of the corrugated pipe 222.

[0080] The system utilizes the characteristic that seawater rapidly passes over the outer wall of the krill net 121 when the hull 13 propels the krill net 121. To adjust the height of the krill net 121, the hull 13's speed is increased. A reinforcing component 32 is installed inside the equipment. When the rapidly flowing seawater passes the horn-shaped pipe 321, the wider inlet and narrower outlet create high pressure. Since the corrugated pipe 322 is a hollow flexible tube, the seawater ultimately flows towards the stern of the corrugated pipe 322. When the high-pressure seawater enters the corrugated pipe 322, the connection between the corrugated pipe 322 and the trumpet pipe 321 will be taut due to the high pressure. Through the application of the above components, when the height of the equipment is adjusted, the taut corrugated pipe 322 will effectively increase the bending resistance of the outer wall of the krill net 121, and prevent the krill net 121 from being folded too much at the rubber ring 113 due to the resistance of seawater when it moves up and down, causing the krill net 121 to block the rubber ring 113 and affect the krill capture efficiency.

[0081] A hydraulic hose 24 is fixedly connected to the top of the hull 13, a hydraulic hose winch 23 is fixedly connected to the side wall of the hydraulic hose 24, a hose connection device 25 is fixedly connected to the end of the hose 214 away from the shrimp suction pump 213, and a hose winch 26 is fixedly connected to the top of the hull 13.

[0082] When the fishing boat begins net deployment, once the net bag 211 reaches the designated operating area, the first hose 212 is pulled out from the hose winch 26 and connected to the net bag 211. Simultaneously, the first sensor 312 is connected to the net bag 211, and the first cable 15 is connected to the first sensor 312. The krill net 121 and the first hose 212 continue to be deployed. When the opening of the krill net 121 reaches the operating area on the deck, the second sensor 314 is connected to the opening of the krill net 121. The trawl wire 17 is pulled out from the trawl winch 16 and connected to the krill net 121. The net deployment continues until the entire krill net 121 is submerged. Based on the shrimp population data obtained from the fish finder, the depth of the shrimp population is determined. Based on experience, a sufficiently long hose 212 is pulled out from the hose winch 26. The hose 212 then... The krill net 121 and the trawl wire 17 are pulled into the water by the current and continuously released. When the free end of the first hose 212 reaches the operating area, the trawl winch 16 stops releasing the net and hoists the shrimp suction pump 213 to the operating area. Its inlet end is connected to the first hose 212, and the prepared second hose 214 is connected to the outlet end of the shrimp suction pump 213. The other end of the second hose 214 is connected to the hydraulic connection device. The towing wire 19 is pulled out from the towing winch 18 to the operating area, and the hydraulic hose 24 is pulled out from the hydraulic hose winch 23 to the operating area. The towing wire 19 and the hydraulic hose 24 are connected to the shrimp suction pump 213. Then, the pump body and other components are hoisted into the sea. After the towing winch 18 releases the towing wire 19 of a set length, the towing winch 18 stops and brakes.

[0083] A specific application of this embodiment is as follows: When the fishing boat begins net-laying operations, when the net bag 211 reaches the continuous operation area, the first hose 212 is pulled out from the hose winch 26 and connected to the net bag 211. At the same time, the first sensor 312 is connected to the net bag 211, and the first cable 15 is connected to the first sensor 312. The krill net 121 and the first hose 212 continue to be released. When the opening of the krill net 121 reaches the operation area on the deck, the second sensor 314 is connected to the opening of the krill net 121. The trawl wire 17 is pulled out from the trawl winch 16 and connected to the krill net 121. The net continues to be released until the entire krill net 121 is in the water. Based on the shrimp population data obtained by the fish finder, the depth of the shrimp population is determined. Based on experience, a sufficiently long hose 212 is pulled out from the hose winch 26. Hose 1 212 is pulled into the water along with the krill net 121 and the trawl wire 17 by the water flow and is continuously released. When the free end of hose 1 212 reaches the operating area, the trawl winch 16 stops releasing the net and hoists the shrimp suction pump 213 to the operating area. Its inlet end is connected to hose 1 212, and the prepared hose 2 214 is connected to the outlet end of the shrimp suction pump 213. The other end of hose 2 214 is connected to the hydraulic connection device. The towing wire 19 is pulled out from the towing winch 18 to the operating area, and the hydraulic hose 24 is pulled out from the hydraulic hose winch 23 to the operating area. The towing wire 19 and the hydraulic hose 24 are connected to the shrimp suction pump 213. Then, the pump body and other components are hoisted into the sea. After the towing winch 18 releases the towing wire 19 of a set length, the towing winch 18 stops and brakes.

[0084] To address the issue of slow vertical adjustment speed of the krill net 121, a floating component 22 is installed inside the device. When it is necessary to lift the krill net 121 upwards, the power to the waterproof hydraulic pump 223 is turned on, causing the pump to rotate forward and forcing the seawater accumulated inside the metal float 221 to be expelled. Simultaneously, the vent pipe on the side wall of the metal float 221 introduces high-pressure gas into the float 221, making the gas volume inside the float 221 greater than the seawater volume. The seawater and air inside the metal float 221 can interact through the corrugated pipe 222. When there is enough air inside the metal float 221, the metal float 221 will generate buoyancy and cause the end of the krill net 121 to float upward. When the krill net 121 needs to submerge, the waterproof hydraulic pump 223 rotates in the opposite direction and forces the external seawater into the bellows 222 through the waterproof hydraulic pump 223. As the seawater fills the metal float 221, the weight of the collection mechanism 1, the adjustment mechanism 2 and the limiting mechanism 3 will force the krill net 121 to submerge quickly. Through the application of the above components, the speed of adjusting the depth of the krill net 121 is effectively accelerated.

[0085] When the hull 13 propels the krill net 121, seawater rapidly passes over the outer wall of the krill net 121. To adjust the height of the krill net 121, the hull 13's speed is increased. A reinforcing component 32 is installed inside the equipment. When the rapidly flowing seawater passes the horn-shaped pipe 321, the wider inlet and narrower outlet create high pressure. Since the corrugated pipe 322 is a hollow flexible tube, the seawater is ultimately discharged outwards at the stern of the corrugated pipe 322. When high-pressure seawater enters the corrugated pipe 322, the connection between the corrugated pipe 322 and the trumpet pipe 321 will be taut due to the high pressure. Through the application of the above components, when the equipment is adjusted in height, the taut corrugated pipe 322 will effectively increase the bending resistance of the outer wall of the krill net 121, and prevent the krill net 121 from being folded too much at the rubber ring 113 due to the resistance of seawater when it moves up and down, causing the krill net 121 to block the rubber ring 113 and affecting the krill capture efficiency.

[0086] The crew controls the remote monitoring system via the cab, displaying data and images. Combined with the fish finder system on the fishing vessel, once the krill net 121 enters the krill swarm, the suction pump 213 is activated to begin efficient, continuous pumping and dredging operations. Since the krill swarm has poor swimming ability, the remaining length of the flexible hose 212 when released is sufficient for adjusting the net's position. This pumping system can operate continuously in waters ranging from 30m to 200m in depth, adapting to krill harvesting at different water depths.

[0087] When a pump malfunctions, such as the shrimp suction pump 213, the towing winch 18 retracts the towing wire 19 and hoists the pump body to the deck operating area for troubleshooting. Other equipment in the pump suction fishing system does not need to be operated, which greatly reduces the complexity of maintenance and the workload of the crew, while also saving time. After the malfunction is resolved, the pump body is hoisted into the sea, the shrimp suction pump 213 is started, and continuous pump suction fishing operations can continue.

[0088] If the shrimp suction pump 213 or the hose is blocked, the backwash system will be activated. The backwash system in this continuous pump-suction harvesting system consists of a backwash pump, solenoid valve one, solenoid valve two, solenoid valve three, and corresponding piping. During normal pump-suction harvesting, the backwash pump is in standby mode, solenoid valves one and two are closed, and solenoid valve three is open. The shrimp water pumped onto the boat enters the spiral drainer via the pipeline through solenoid valve three.

[0089] When the backwash system is activated, the backwash pump is remotely started, solenoid valves one and two are remotely opened, and solenoid valve three is remotely closed. The shrimp suction pump 213 stops operating. Seawater is drawn by the backwash pump and discharged in reverse through the pipeline into hose two 214, and may also pass through the shrimp suction pump 213 into hose one 212. Under the pressure of the backwash pump and the water column pressure created by the height difference between the deck and the waterline, the blockage will be flushed away by the seawater. After the blockage is cleared, the backwash system is stopped, and the shrimp suction pump 213 is restarted to continue continuous pumping and harvesting operations.

[0090] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A lifting and adjusting mechanism for a multi-bag type fishing net used for Antarctic krill harvesting, comprising a hull (13), a cable winch (14) fixedly connected to the top of the hull (13), a cable (15) sleeved on the outer wall of the cable winch (14), a trawl winch (16) fixedly connected to the top of the hull (13), a trawl wire (17) sleeved on the outer wall of the trawl winch (16), and a towing winch (18) fixedly connected to the top of the hull (13), a towing wire (19) sleeved on the outer wall of the towing winch (18), characterized in that, Also includes: A collection mechanism (1) is fixedly installed at one end of the trawl wire (17) away from the trawl winch (16); Adjustment mechanism (2), which is fixedly installed on the outer wall of collection mechanism (1); A limiting mechanism (3) is fixedly installed on the inner wall of the collecting mechanism (1); Before use, the collection mechanism (1) needs to be thrown into the sea and the extension length of the trawl wire (17) is controlled by the trawl winch (16) so as to ensure that the collection mechanism (1) and the adjustment mechanism (2) can catch the krill on the seabed.

2. The lifting and adjusting mechanism for a multi-bag type fishing net used for Antarctic krill harvesting according to claim 1, characterized in that: The collection mechanism (1) includes: Positioning component (11), which is fixedly disposed at one end of the trawl wire (17) away from the trawl winch (16); A fishing assembly (12) is fixedly disposed on the side wall of the positioning assembly (11); When the hull (13) is sailing forward, the positioning component (11) will drive the fishing component (12) to carry out fishing at a specified height.

3. The lifting and adjusting mechanism for a multi-bag type fishing net used for Antarctic krill harvesting according to claim 2, characterized in that: The adjustment mechanism (2) includes: A collection component (21) is fixedly disposed at one end of the fishing component (12) away from the trawl wire (17); A floating component (22) is fixedly disposed on the side wall of the positioning component (11); When the fishing component (12) catches krill, the collecting component (21) will generate a suction force to discharge the krill inside the fishing component (12) toward the hull (13).

4. The lifting and adjusting mechanism for a multi-bag type fishing net used for Antarctic krill harvesting according to claim 3, characterized in that: The limiting mechanism (3) includes: An auxiliary component (31) is fixedly disposed on the inner wall of the fishing assembly (12); A reinforcing component (32) is fixedly disposed on the outer wall of the fishing component (12); Among them, the auxiliary component (31) will detect the specific conditions of the seabed, and the hull (13) is equipped with a backwash pump, solenoid valve one, solenoid valve two, solenoid valve three and related pipelines to form a backwash system.

5. The lifting and adjusting mechanism for a multi-bag type fishing net used for Antarctic krill harvesting according to claim 4, characterized in that: The positioning component (11) includes a pull plate (111) fixedly connected to one end of the trawl wire (17) away from the trawl winch (16), a cable (112) fixedly connected to the side wall of the pull plate (111), and a rubber ring (113) fixedly connected to one end of the cable (112) away from the pull plate (111). Among them, the rubber ring (113) is a soft material that will deform when subjected to pressure; The fishing assembly (12) includes a krill net (121) fixedly connected to the side wall of a rubber ring (113). A soft ring (122) is fixedly connected to one end of the krill net (121) away from the rubber ring (113), and a filter plate (123) is fixedly connected to one end of the soft ring (122) away from the krill net (121). Under normal conditions, the krill net (121) is in a closed state. When the ship (13) is sailing, the seawater passes through the krill net (121), causing the krill net (121) to expand, which in turn causes the rubber ring (113) to expand outward.

6. The lifting and adjusting mechanism for a multi-bag type fishing net used for Antarctic krill harvesting according to claim 5, characterized in that: The collection assembly (21) includes a mesh bag (211) fixedly connected to the side wall of the filter plate (123), a hose (212) fixedly connected to the side wall of the mesh bag (211), a shrimp suction pump (213) fixedly connected to the end of the hose (212) away from the mesh bag (211), and a hose (214) fixedly connected to the side wall of the shrimp suction pump (213). The end of the towing wire (19) away from the towing winch (18) is fixedly connected to the side wall of the shrimp suction pump (213).

7. The lifting and adjusting mechanism for a multi-bag type fishing net used for Antarctic krill harvesting according to claim 5, characterized in that: The floating assembly (22) includes a plurality of metal floats (221) fixedly connected to the side wall of the rubber ring (113), and a corrugated pipe (222) is connected through the plurality of metal floats (221). A waterproof hydraulic pump (223) is fixedly connected to the inner wall of the corrugated pipe (222). Among them, the outer wall of the metal float (221) at the top is connected to an exhaust pipe. When it is necessary to adjust the height of the collection mechanism (1), the waterproof hydraulic pump (223) will draw in external seawater to fill the metal float (221), or discharge the seawater inside the metal float (221) to the outside.

8. The lifting and adjusting mechanism for a multi-bag-type fishing net for Antarctic krill harvesting according to claim 5, characterized in that: The auxiliary component (31) includes a fixed frame (311) fixedly connected to the inner wall of the soft ring (122), a sensor (312) fixedly connected to the side wall of the fixed frame (311), a sensor (314) fixedly connected to the side wall of the pull plate (111), and a cable (313) fixedly connected to the side wall of the sensor (314). Among them, the end of cable one (313) away from sensor two (314) is fixedly connected to the side wall of sensor one (312), and the side wall of sensor two (314) is fixedly connected to cable (15).

9. The lifting and adjusting mechanism for a multi-bag type fishing net used for Antarctic krill harvesting according to claim 5, characterized in that: The reinforcing component (32) includes a corrugated tube 2 (322) fixedly connected to the side wall of the krill net (121), and a trumpet tube (321) fixedly connected to the side wall of the corrugated tube 2 (322). The outer wall of the trumpet tube (321) is fixedly connected to the outer wall of the corrugated tube (222). When the ship (13) is sailing, the flowing seawater will be injected into the inner wall of the second corrugated pipe (322) through the horn pipe (321), causing the second corrugated pipe (322) to deform.

10. The lifting and adjusting mechanism for a multi-bag type fishing net for Antarctic krill harvesting according to claim 6, characterized in that: A hydraulic hose (24) is fixedly connected to the top of the hull (13), a hydraulic hose winch (23) is fixedly connected to the side wall of the hydraulic hose (24), a hose connection device (25) is fixedly connected to the end of the second hose (214) away from the shrimp suction pump (213), and a hose winch (26) is fixedly connected to the top of the hull (13). Among them, the hose connection device (25) is a fixed structure with a quick-connect flange, welded to the deck, with one end connected to the hose and the other end connected to the cabin through a stainless steel pipeline and connected to the spiral drainer.

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