Field coilia ectenes trapping device

Abstract

The invention belongs to the technical field of fishing devices, and particularly relates to a field coilia ectenes trapping device which comprises a floating body and further comprises a depth adjusting assembly and a plurality of fishing assemblies, the depth adjusting assembly comprises a plurality of winding rollers and traction ropes, the traction ropes are wound on the outer sides of the winding rollers respectively, and the fishing assemblies are arranged on the floating body. The fishing assembly comprises trapping cages, and the ends, away from the winding roller, of the multiple traction ropes are fixedly connected with the multiple trapping cages correspondingly. Through the arranged depth adjusting assembly, before trapping work is carried out, all winding rollers are rotated to wind and unwind the corresponding traction ropes, so that the releasing lengths of all the traction ropes are adjusted, the releasing depths of all the trapping cages can be adjusted by adjusting the releasing lengths of all the traction ropes, and the trapping efficiency is improved. The device can cover the whole deep water layer during trapping work, the trapping work can be better carried out, and then the accuracy of investigation work is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of fishing devices, and specifically relates to a wild tapertail anchovy trapping device. Background Art

[0002] The tapertail anchovy is a precious edible fish with delicate, fresh and fat meat and strong seasonality. Especially during the season when female fish are full of eggs, both the meat and eggs are extremely fat and delicious. Since the full implementation of the fishing ban and withdrawal of fishing boats in the Yangtze River Basin on January 1, 2020, the aquatic biological integrity index of the main stream of the Yangtze River, Poyang Lake and Dongting Lake has been improved by two levels from the worst "fishless" before the fishing ban. The once severely degraded ecological functions in the Yangtze River Basin have gradually recovered, and the beautiful scenery of "clear water, green banks, fish leaping and birds flying" has reappeared. The migratory tapertail anchovy has increased significantly. Before the fishing ban and withdrawal, the number of rare migratory fish was scarce (or not present), and relevant investigation work was scarce. When conducting investigation work, it is necessary to trap the tapertail anchovy.

[0003] A Chinese patent with the publication number CN118000167B discloses a light-induced fish-catching device. By setting a floating cage body, it can meet the fishing requirements in different waters. The set power supply component can provide the endurance ability when working outdoors, ensuring the long-term fish-inducing ability of the lamp body. At the same time, the irradiation angle of the lamp body in the present invention can be adaptively adjusted according to actual needs, improving the fishing effect. In addition, the lamp body in the present invention can also be driven by wind to achieve adaptive rotation, thus greatly increasing the irradiation range during the actual working process.

[0004] Currently, in the prior art, when placing the trapping device, the placement depth of the trapping cage is fixed, which has certain limitations during the trapping process and cannot adjust the position of the trapping cage according to the depth of the water area and the living habits of the target fish.

[0005] Therefore, the present invention provides a wild tapertail anchovy trapping device. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A wild tapertail anchovy trapping device of the present invention includes a floating main body, and also includes a depth adjustment component and a plurality of fishing components. The depth adjustment component includes a plurality of winding rollers and traction ropes. The plurality of traction ropes are respectively wound around the outer sides of the plurality of winding rollers. The fishing components include trapping cages. One end of each of the plurality of traction ropes away from the winding rollers is fixedly connected to one of the plurality of trapping cages. The depth adjustment component adjusts the placement depth of the trapping cage by winding and unwinding the traction ropes through the rotation of the winding rollers.

[0008] Preferably, a number of groups of brackets are fixedly installed on the inner wall of the floating main body. A winding shaft is rotatably installed between the inner walls of each group of brackets. A number of winding rollers are respectively fixedly installed on the outer walls of the number of winding shafts. One end of each winding shaft is fixedly installed with a rotating shaft. The end of the rotating shaft away from the winding shaft penetrates through the floating main body and is fixedly installed with a rotating ring.

[0009] Preferably, a number of positioning frames are fixedly installed on the outer wall of the floating main body. A limiting ring is fixedly installed on the top of the positioning frame. The towing rope passes through the inside of the limiting ring. A bottom plate is fixedly installed on the top of the positioning frame. A clamping plate is arranged above the bottom plate. A sliding column is fixedly installed on the top of the bottom plate. The outer wall of the sliding column is slidably connected with the inner wall of the clamping plate. A threaded rod is rotatably installed in the inner wall of the bottom plate. The outer wall of the threaded rod is threadedly connected with the inner wall of the clamping plate. One end of the threaded rod is fixedly installed with a knob. The towing rope is fixed by the bottom plate and the clamping plate.

[0010] Preferably, water-permeable holes are formed in the outer wall of the trapping cage. A number of trapping cylinders are evenly and fixedly installed on the inner wall of the trapping cage. A hinge member A is fixedly installed on the outer wall of the trapping cylinder. The trapping cylinder is hinged with a sealing baffle through the hinge member A. A hinge member B is fixedly installed on the outer wall of the sealing baffle. An automatic telescopic rod is fixedly installed on the top of the inner wall of the trapping cage. One end of the automatic telescopic rod is fixedly installed with a lifting plate. A number of hinge members C are fixedly installed on the outer wall of the lifting plate. A connecting rod is hinged between the number of hinge members C and the corresponding hinge member B.

[0011] Preferably, a lifting frame is fixedly installed on the outer wall of the lifting plate. A number of connecting blocks are fixedly installed on the outer wall of the lifting frame. A vertical rod is fixedly installed at the bottom of the connecting block. One end of the vertical rod is fixedly installed with a blocking seat. A number of fish outlet holes are formed in the bottom of the inner wall of the trapping cage. The number of fish outlet holes are respectively located above the number of blocking seats.

[0012] Preferably, a feed box is slidably installed in the inner wall of the blocking seat. A discharge hole is formed in the top of the blocking seat. Guide rails are symmetrically and fixedly installed on the top of the blocking seat. A shielding plate is slidably installed between the two guide rails. An inclined block is fixedly installed on the top of the shielding plate. A vertical plate is fixedly installed on the top of the blocking seat. An elastic member is fixedly installed between the vertical plate and the inclined block. Extension blocks are fixedly installed on the bottom of the inner wall of the trapping cage and on one side of the fish outlet holes respectively.

[0013] Preferably, a housing is fixedly installed on the outer wall of the vertical plate. The inner wall of the housing is slidably connected with the outer wall of the inclined block. Magnets A and B are symmetrically and fixedly installed in the inner walls of the blocking seat and the feed box respectively. The magnet B and the magnet A are magnetically attracted to each other.

[0014] Preferably, a stirring shaft is rotatably installed on the inner wall of the feed box. One end of the stirring shaft is fixedly installed with a rotating seat outside the feed box. A plurality of fan blades are uniformly fixedly installed on the outer wall of the rotating seat. A stirring rod is fixedly installed on the inner wall of the stirring shaft and inside the feed box.

[0015] Preferably, a connecting rod is fixedly installed on the top of the inner wall of the trapping cage. The connecting rod is slidably connected to the lifting plate. One end of the connecting rod is fixedly installed with a light source box. A plurality of lighting lamps are fixedly installed on the inner wall of the light source box. The plurality of lighting lamps are respectively aligned with a plurality of trapping cylinders. A photovoltaic panel is fixedly installed on the top of the floating body.

[0016] Preferably, a flag is inserted into the top of the floating body. A connecting rope is fixedly installed at the bottom of the floating body. One end of the connecting rope away from the floating body is fixedly installed with a fixed anchor. A fish-taking pipe is fixedly installed on the bottom inner wall of the trapping cage. A sealing valve is threadedly installed on the inner wall of the fish-taking pipe.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. For the wild Coilia nasus trapping device of the present invention, before the trapping work, by setting the depth adjustment component, rotate each winding roller to take in and release the corresponding traction rope, so as to adjust the release length of each traction rope. By adjusting the release length of each traction rope, the release depth of each trapping cage can be adjusted, enabling the device to cover all water depths during the trapping work, making the trapping work better carried out, and thus improving the accuracy of the investigation work.

[0019] 2. For the wild Coilia nasus trapping device of the present invention, by setting the fishing component, during the trapping work, according to the living habits of the target fish, the device can be made to carry out the trapping work during the high-incidence period of the target fish's activities, and the trapping work of the target fish can be carried out specifically. By turning on the lighting lamps and trapping cylinders during the high-incidence period of the target fish's activities for trapping work, the target fish can be trapped efficiently and specifically.

[0020] 3. For the wild Coilia nasus trapping device of the present invention, during the time period when it is not the high-incidence period of the target fish's activities, turn off the lighting lamps and drive the blocking seat to move downward out of the fish outlet hole by the descent of the lifting plate, so that the fish outlet hole is opened. After the captured fish is no longer attracted by the lighting lamps, the small fish that do not meet the target size will swim out through the fish outlet hole, achieving the purpose of only catching big fish and releasing small fish during the fishing process, specifically catching mature big fish, avoiding waste, and reducing the impact on fish production.

[0021] 4. For a wild Coilia nasus trapping device according to the present invention, during a period when it is not the peak activity period of target fish, the lifting plate descends, and the sealing baffle blocks the trapping cylinder, thereby effectively preventing the captured large fish from swimming out of the trapping cage through the trapping cylinder after being no longer attracted by the light-emitting lamp, ensuring the effectiveness of the trapping work.

[0022] 5. For a wild Coilia nasus trapping device according to the present invention, when performing the work of releasing small fish, as the blocking seat moves downward, the inclined block will drive the shielding baffle to move, thereby opening the discharge hole. After the discharge hole is opened, the feed will float out through the discharge hole and form a downward distribution path. The small fish in the trapping cage will swim out through the fish outlet hole under the attraction of the feed, so that the work of releasing small fish can be better carried out, and the probability of small fish swimming out of the trapping cage is increased.

[0023] 6. For a wild Coilia nasus trapping device according to the present invention, when the blocking seat moves downward, it will drive the feed box to move accordingly. When the feed box moves, it will drive the rotating seat and the fan blade to move downward through the stirring shaft. When the fan blade moves, it interacts with the water body through its special shape to make it rotate. When the fan blade rotates, it will drive the stirring rod to rotate through the rotating seat and the stirring shaft. When the stirring rod rotates, it will stir the feed to prevent the feed from agglomerating after encountering water and being unable to float out. Under the stirring of the stirring rod, the feed can effectively float out, thereby effectively attracting small fish.

[0024] 7. For a wild Coilia nasus trapping device according to the present invention, it can be set in a river channel with a relatively fast water flow, overcoming the problem that traditional fishing nets cannot work (or can only be set at the edge of the river channel), resulting in poor investigation effects. At the same time, it overcomes the problem that the surveyed waters are mostly in sparsely populated wild river sections where external power sources cannot be connected. This trapping device does not require an external power source, and the placement location in the water can be freely selected according to needs.

[0025] 8. For a wild Coilia nasus trapping device according to the present invention, after being placed once, it can be placed in the water for several days. After taking out and collecting the fish catch at fixed times, it can be directly put back into the water for continuous investigation. Compared with traditional fishing nets, the workload is significantly reduced. The fish caught by this trapping device are mainly in the trapping cage, and the mortality rate is relatively low in a short time, overcoming the problem that all the Coilia nasus caught by traditional fishing nets die, and can continuously provide live Coilia nasus samples for subsequent work. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0028] Figure 2 is a structural schematic diagram of the floating main body of the present invention;

[0029] Figure 3is a cross-sectional view of the floating main structure of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the positioning frame of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the trapping cage of the present invention;

[0032] Figure 6 is a cross-sectional view of the trapping cage structure of the present invention;

[0033] Figure 7 It is a structural schematic diagram of the lifting frame of the present invention;

[0034] Figure 8 It is a schematic diagram of the structure of the trapping tube of the present invention;

[0035] Figure 9 The present invention Figure 6 A magnified view of the structure at center;

[0036] Figure 10 It is a schematic diagram of the structure of the inclined block of the present invention;

[0037] Figure 11 It is a schematic diagram of the structure of the block seat of the present invention;

[0038] Figure 12 It is a structural schematic diagram of a feed box of the present invention;

[0039] Figure 13 It is a schematic diagram of the structure of the fan blade of the present invention;

[0040] In the figure: 1. floating body; 2. winding roller; 3. traction rope; 4. bracket; 5. winding shaft; 6. rotating shaft; 7. swivel; 8. trapping cage; 9. positioning frame; 10. limiting ring; 11. bottom plate; 12. clamping plate; 13. sliding column; 14. threaded rod; 15. knob; 16. water-permeable hole; 17. trapping tube; 18. hinge A; 19. sealing baffle; 20. hinge B; 21. automatic telescopic rod; 22. lifting plate; 23. hinge C; 24. receiving rod; 25. lifting frame; 26. connecting block; 27 , vertical rod; 28, block seat; 29, fish outlet; 30, feed box; 31, feed outlet; 32, guide rail; 33, shielding plate; 34, inclined block; 35, vertical plate; 36, elastic member; 37, extension block; 38, shell; 39, magnet A; 40, magnet B; 41, stirring shaft; 42, rotating seat; 43, fan blade; 44, stirring rod; 45, connecting rod; 46, light source box; 47, light-emitting lamp; 48, photovoltaic panel; 49, marking flag; 50, connecting rope; 51, fixed anchor; 52, fish retrieval tube; 53, sealing valve. DETAILED DESCRIPTION

[0041] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0042] As Figures 1 to 3 shown, a wild Coilia nasus trapping device according to an embodiment of the present invention includes a floating main body 1, and further includes a depth adjustment component and a plurality of fishing components. The depth adjustment component includes a plurality of winding rollers 2 and traction ropes 3. The plurality of traction ropes 3 are respectively wound around the outer sides of the plurality of winding rollers 2. The fishing component includes a trapping cage 8. One ends of the plurality of traction ropes 3 away from the winding rollers 2 are respectively fixedly connected to the plurality of trapping cages 8. The depth adjustment component winds and unwinds the traction ropes 3 by rotating the winding rollers 2, so as to adjust the placement depth of the trapping cages 8. Different fish are at different depths in different waters. When conducting investigation work, in order to better cover all water depths, the device is adjusted first. When carrying out the adjustment work, the winding roller 2 is rotated first. By rotating the winding roller 2, the corresponding traction rope 3 can be wound and unwound. By changing the release length of the traction rope 3 by each winding roller 2, the placement depth of the trapping cage 8 can be adjusted, so that the depth of each trapping cage 8 after being placed in the water can be adjusted arbitrarily according to requirements, enabling the device to cover all water depths during the Coilia nasus trapping investigation work and making the investigation work more accurate.

[0043] As Figures 1 to 3 shown, a plurality of groups of brackets 4 are fixedly installed on the inner wall of the floating main body 1. A winding shaft 5 is rotatably installed between the inner walls of each group of brackets 4. The plurality of winding rollers 2 are respectively fixedly installed on the outer walls of the plurality of winding shafts 5. One end of each winding shaft 5 is fixedly installed with a rotating shaft 6. The end of the rotating shaft 6 away from the winding shaft 5 penetrates through the floating main body 1 and is fixedly installed with a rotating ring 7. The staff rotates each rotating ring 7 by hand. When the rotating ring 7 rotates, it will drive the rotating shaft 6 to rotate. When the rotating shaft 6 rotates, it will drive the winding shaft 5 to rotate. When each winding shaft 5 rotates, it will drive each winding roller 2 to rotate. As the winding roller 2 rotates, the traction rope 3 wound above it can be wound and unwound. By changing the release length of the traction rope 3 by the winding roller 2, the depth of the trapping cage 8 connected to the traction rope 3 in the water can be adjusted, increasing the flexibility of the device and making the device very convenient to adjust.

[0044] As Figures 1 to 4As shown, several positioning frames 9 are fixedly installed on the outer wall of the floating body 1. A limit ring 10 is fixedly installed at the top of the positioning frame 9. The towing rope 3 passes through the inside of the limit ring 10. A bottom plate 11 is fixedly installed at the top of the positioning frame 9. A clamping plate 12 is arranged above the bottom plate 11. A sliding column 13 is fixedly installed at the top of the bottom plate 11. The outer wall of the sliding column 13 is slidably connected with the inner wall of the clamping plate 12. A threaded rod 14 is rotatably installed on the inner wall of the bottom plate 11. The outer wall of the threaded rod 14 is threadedly connected with the inner wall of the clamping plate 12. A knob 15 is fixedly installed at one end of the threaded rod 14. The towing rope 3 is fixed by the bottom plate 11 and the clamping plate 12; when adjusting the dropping depth of each trapping cage 8, after the release length of the towing rope 3 is adjusted, rotate the corresponding knob 15. The knob 15 will drive the threaded rod 14 to rotate. Through the cooperation of the thread between the threaded rod 14 and the clamping plate 12, the clamping plate 12 will be driven to approach the bottom plate 11. The towing rope 3 is located between the bottom plate 11 and the clamping plate 12. After the clamping plate 12 approaches the bottom plate 11, it will clamp and fix the towing rope 3, thereby preventing the towing rope 3 from being misreleased due to the pulling force of the trapping cage 8 during the trapping operation, avoiding the change of the depth of the trapping cage 8, and ensuring the effectiveness of the investigation work.

[0045] As Figures 1 to 8 shown, a water-permeable hole 16 is formed in the outer wall of the trapping cage 8. A plurality of trapping cylinders 17 are uniformly and fixedly installed on the inner wall of the trapping cage 8. A hinge member A18 is fixedly installed on the outer wall of the trapping cylinder 17. The trapping cylinder 17 is hinged with a sealing baffle 19 through the hinge member A18. A hinge member B20 is fixedly installed on the outer wall of the sealing baffle 19. An automatic telescopic rod 21 is fixedly installed at the top of the inner wall of the trapping cage 8. One end of the automatic telescopic rod 21 is fixedly installed with a lifting plate 22. A plurality of hinge members C23 are fixedly installed on the outer wall of the lifting plate 22. A connecting rod 24 is hinged between the plurality of hinge members C23 and the corresponding hinge member B20; during the trapping operation, according to the different living habits of different fish, the high-activity periods of different fish will also be different. The high-activity period of Coilia nasus is in the evening and before dawn. By timing to turn on the light-emitting lamp 47 at a specific time for the trapping operation, during the trapping operation, the automatic telescopic rod 21 will contract and drive the lifting plate 22 to move upward. When the lifting plate 22 moves upward, it will drive the sealing baffle 19 to flip upward through the connecting rod 24. After the sealing baffle 19 flips, the originally blocked trapping cylinder 17 will be opened, and then the trapping operation will start. After the high-activity period of Coilia nasus has passed, the automatic telescopic rod 21 will extend again to make the sealing baffle 19 flip downward to block the trapping cylinder 17. At this time, the fish can no longer pass through the trapping cylinder 17 and then into the trapping cage 8. By opening the trapping cylinder 17 for the trapping operation during the high-activity period of the target fish, the trapping work of the target fish can be carried out targeted, and then the target fish can be trapped efficiently and specifically.

[0046] AsFigures 1 to 9 As shown, a lifting frame 25 is fixedly installed on the outer wall of the lifting plate 22. A number of connecting blocks 26 are fixedly installed on the outer wall of the lifting frame 25. A vertical rod 27 is fixedly installed at the bottom of the connecting block 26. A retaining seat 28 is fixedly installed at one end of the vertical rod 27. A number of fish outlet holes 29 are formed in the bottom inner wall of the trapping cage 8, and the number of fish outlet holes 29 are respectively located above the number of retaining seats 28. When the light-emitting lamp 47 is in the on state for trapping work, the lifting plate 22 moves upward to make the sealing baffle 19 turn upward. At this time, the trapping cylinder 17 is in the open state to allow fish to enter. The retaining seat 28 is located inside the fish outlet hole 29 to make the fish outlet hole 29 in a sealed state, preventing small fish from being attracted by the light and swimming into the trapping cage 8 through the fish outlet hole 29. When the trapping work is over, when the lifting plate 22 descends to make the trapping cylinder 17 in a closed state, the light-emitting lamp 47 is turned off and no longer attracts fish. At this time, as the lifting plate 22 descends, the lifting plate 22 will drive the lifting frame 25 to descend. The descent of the lifting frame 25 will drive the connecting block 26 to descend. The connecting block 26 will drive the retaining seat 28 to descend through the vertical rod 27. The descent of the retaining seat 28 will move out of the fish outlet hole 29, so that the fish outlet hole 29 is in an unobstructed state. At this time, since the light-emitting lamp 47 no longer attracts fish, small fish that do not meet the target size can swim out of the trapping cage 8 through the fish outlet hole 29, achieving the effect of only trapping big fish and releasing small fish, avoiding waste and reducing the impact on fish production. At the same time, since the trapping cylinder 17 has been closed at this time, it can prevent the trapped big fish from escaping from the trapping cylinder 17.

[0047] As Figures 1 to 11As shown, a feed box 30 is slidably installed on the inner wall of the retaining seat 28. A discharge hole 31 is opened at the top of the retaining seat 28. Guide rails 32 are symmetrically and fixedly installed at the top of the retaining seat 28. A baffle plate 33 is slidably installed between the two guide rails 32. An inclined block 34 is fixedly installed at the top of the baffle plate 33. A vertical plate 35 is fixedly installed at the top of the retaining seat 28. An elastic member 36 is fixedly installed between the vertical plate 35 and the inclined block 34. Extension blocks 37 are fixedly installed at the bottom of the inner wall of the trapping cage 8 and on one side of the fish outlet hole 29 respectively; Feed is placed inside the feed box 30. When releasing the small fish that are trapped and do not meet the target size, as the retaining seat 28 moves downward from the inside of the fish outlet hole 29, the inclined block 34 will gradually get rid of the restrictions of the extension block 37 and the fish outlet hole 29. With the removal of the restrictions, the inclined block 34 will move away from the vertical plate 35 under the action of the elastic force of the elastic member 36. When the inclined block 34 moves, it will drive the baffle plate 33 to move. After the baffle plate 33 moves, the discharge hole 31 will be opened. After the discharge hole 31 is opened, the feed in the feed box 30 will float out through the discharge hole 31. As the retaining seat 28 moves downward, the floating feed will be distributed in a downward path. The small fish inside the trapping cage 8 will swim out through the fish outlet hole 29 under the attraction of the feed, so as to better release the small fish and effectively increase the probability that the trapped small fish swim out through the fish outlet hole 29.

[0048] As Figures 1 to 12 shown, a housing 38 is fixedly installed on the outer wall of the vertical plate 35. The inner wall of the housing 38 is slidably connected to the outer wall of the inclined block 34. Magnets A 39 and magnets B 40 are symmetrically and fixedly installed on the inner walls of the retaining seat 28 and the feed box 30 respectively. The magnet B 40 and the magnet A 39 are magnetically attracted to each other; The housing 38 is provided to protect the elastic member 36 to prevent the elastic member 36 from being interfered by other external forces or foreign objects during contraction. At the same time, the housing 38 can limit the inclined block 34 to ensure the stability of the inclined block 34 during movement. Through the cooperation of the magnet A 39 and the magnet B 40, the feed box 30 can be kept in contact with the retaining seat 28 to prevent the feed box 30 from being accidentally opened. At the same time, through the cooperation of the magnet A 39 and the magnet B 40, it is convenient to take out the feed box 30 when feeding the feed box 30, and thus it is convenient to feed the feed.

[0049] As Figures 1 to 13As shown in the figure, a stirring shaft 41 is rotatably installed on the inner wall of the feed box 30. One end of the stirring shaft 41 and located outside the feed box 30 is fixedly installed with a rotating seat 42. A number of fan blades 43 are evenly and fixedly installed on the outer wall of the rotating seat 42. A stirring rod 44 is fixedly installed on the inner wall of the stirring shaft 41 and located inside the feed box 30. When the retaining seat 28 moves downward to release small fish, the retaining seat 28 will drive the stirring shaft 41 to move downward through the feed box 30. When the stirring shaft 41 moves downward, it will drive the rotating seat 42 and the fan blades 43 to move downward. When the fan blades 43 move downward, they will interact with the water body. Through the cooperation of the special shape of the fan blades 43 and the water body during movement, the fan blades 43 will rotate. When the fan blades 43 rotate, they will drive the rotating seat 42 to rotate. When the rotating seat 42 rotates, it will drive the stirring rod 44 to rotate through the stirring shaft 41. When the stirring rod 44 rotates, it will stir the feed, thereby preventing the feed from aggregating after encountering water and being unable to float out through the discharge hole 31, ensuring that the feed can float out and effectively attracting small fish, and ensuring the effectiveness of the small fish release work.

[0050] As Figures 1 to 6 shown, a connecting rod 45 is fixedly installed on the top of the inner wall of the trapping cage 8. The connecting rod 45 is slidably connected with the lifting plate 22. One end of the connecting rod 45 is fixedly installed with a light source box 46. A number of light-emitting lamps 47 are fixedly installed on the inner wall of the light source box 46. The number of light-emitting lamps 47 are respectively aligned with a number of trapping cylinders 17. A photovoltaic panel 48 is fixedly installed on the top of the floating body 1. By the connecting rod 45, the light source box 46 is fixed at the center of the trapping cage 8, thereby fixing the position of the light-emitting lamps 47. Each light-emitting lamp 47 is respectively aligned with the trapping cylinder 17, so as to effectively attract Coilia nasus, and enable Coilia nasus to enter the inside of the trapping cage 8 through the trapping cylinder 17, completing the trapping work of Coilia nasus. A photovoltaic panel 48 is arranged on the top of the floating body 1. Since the floating body 1 floats on the water surface, the photovoltaic panel 48 can obtain effective lighting conditions, thereby converting light energy into electrical energy to provide power for the operation of the device. The floating body 1 is mainly made of low-density materials such as foam and plastic, and the center of gravity of the floating body 1 is set in the lower half of the structure to prevent the floating body 1 from tipping over.

[0051] As Figures 1 to 6As shown in the figure, a flag 49 is inserted at the top of the floating body 1, a connecting rope 50 is fixedly installed at the bottom of the floating body 1, and a fixed anchor 51 is fixedly installed at one end of the connecting rope 50 away from the floating body 1. An extracting pipe 52 is fixedly installed on the bottom inner wall of the trapping cage 8, and a sealing valve 53 is installed on the inner wall of the extracting pipe 52 by means of threads; the flag 49 plays an indicating role, facilitating the staff to quickly find the position of the device after the device is put into the water. The fixed anchor 51 is connected to the floating body 1 through the connecting rope 50, and the whole device can be fixed in the water through the fixed anchor 51 to prevent the position of the device from changing. The extracting pipe 52 is arranged at the bottom of the trapping cage 8, and the captured fish can be taken out through the extracting pipe 52 after the sealing valve 53 is opened.

[0052] Working principle: Before the anchovy trapping work is carried out, the device is adjusted first. During the adjustment, each rotating ring 7 is rotated manually by hand. The rotating ring 7 drives the rotating shaft 6 to rotate. The rotating shaft 6 drives the winding roller 2 to rotate through the winding shaft 5. By rotating the winding roller 2, the traction rope 3 wound above is taken in and released. By taking in and releasing the traction rope 3, the length of the traction rope 3 extending outside the floating body 1 is changed, and thus the depth of the trapping cage 8 placed in the water is adjusted. After the device is adjusted, the knob 15 is turned to drive the threaded rod 14 to rotate. The threaded rod 14, through the threaded cooperation with the clamping plate 12, makes the clamping plate 12 approach the bottom plate 11, and thus the traction rope 3 is clamped and fixed to prevent the traction rope 3 from being pulled out due to the pulling force of the trapping cage 8 during the trapping work.

[0053] After the device is adjusted, the device is put into a suitable water area for trapping work. During the trapping work, the floating body 1 will float on the water surface, and the trapping cage 8 will sink into the water for anchovy trapping work. The depth of each trapping cage 8 sinking into the water is determined by the length of the traction rope 3 extending outside the floating body 1 after adjustment.

[0054] When the trapping cage 8 is used to trap the razorfish, since the razorfish uses its developed night vision to prey on daytime bait fish, flashing is more conducive to the razorfish feeding on floating granular feed for trapping. The light emitting lamp 47 emits light to attract the razorfish to enter the trapping cage 8 through the trapping tube 17. Since the trapping tube 17 is in the shape of a truncated cone with a large outside and a small inside, it is difficult for the razorfish to escape after entering the trapping cage 17. The height of the razorfish in the sexually mature stage does not exceed 60 cm, so the internal diameter of the trapping tube 17 is set to 60 cm. Since the high incidence period of the razorfish activity is in the evening and before dawn, the light emitting lamp 47 is turned on at a specific time by timing. At the same time, the automatic telescopic rod 21 contracts and drives the lifting plate 22 to rise. When the lifting plate 22 rises, it drives the receiving rod 24 to move through the hinge C23. When the receiving rod 24 moves, it drives the sealing baffle 19 to flip through the hinge B20, so that the trapping tube 17 is in a smooth state. At this time, the device can perform trapping work. When the high incidence period of knife-shaped anchovy activity has passed, the light 47 is turned off, and the automatic telescopic rod 21 is extended to reset the sealing baffle 19 to block the trapping tube 17. Fish can no longer enter the trapping tube 8 through the trapping tube 17, so that the target fish can be trapped efficiently and specifically.

[0055] When the device has completed a trapping operation during the peak period of razorfish activity, the sealing baffle 19 blocks the trapping tube 17 under the action of the automatic telescopic rod 21, and as the automatic telescopic rod 21 extends, the lifting plate 22 drives the lifting frame 25 to descend, the lifting frame 25 drives the connecting block 26 to descend, and the connecting block 26 drives the blocking seat 28 to descend through the vertical rod 27. When descending, the blocking seat 28 moves from the inner side of the fish outlet hole 29 to the bottom of the trapping cage 8, so that the fish outlet hole 29 is opened. The aperture of the fish outlet hole 29 can allow small fish that do not meet the target size of the trapping to swim out, thereby achieving the purpose of only catching big fish and releasing small fish during the fishing process, and catching mature big fish in a targeted manner to avoid waste and reduce the impact on fish production.

[0056] When the blocking seat 28 moves downward from the inner side of the fish outlet hole 29, the blocking seat 28 will drive the inclined block 34 to move downward. As the inclined block 34 moves downward, the inclined block 34 will gradually get rid of the restrictions of the extension block 37 and the fish outlet hole 29. As the inclined block 34 gets rid of the restrictions, the inclined block 34 will move in the direction away from the vertical plate 35 under the action of the elastic force of the elastic member 36. When the vertical plate 35 moves, it will drive the shielding plate 33 to move. When the shielding plate 33 moves, the discharge hole 31 will be opened, and the feed located inside the feed box 30 will float out from the discharge hole 31 at the top, thereby attracting small fish to swim out of the fish outlet hole 29, so as to better release the small fish.

[0057] When the retaining seat 28 moves downward, the retaining seat 28 drives the rotating seat 42 and the fan blade 43 to move downward through the stirring shaft 41. When the fan blade 43 moves downward, the fan blade 43 interacts with the water flow. Due to the special shape of the fan blade 43, when the water flow passes through the fan blade 43, different flow velocities and pressure distributions are generated at different parts of the fan blade 43. This uneven flow velocity and pressure distribution causes the fan blade 43 to be subjected to a torque, which causes the fan blade 43 to start rotating. When the fan blade 43 rotates, it drives the stirring shaft 41 to rotate through the rotating seat 42. When the stirring shaft 41 rotates, it drives the stirring rod 44 to rotate. When the stirring rod 44 rotates, it stirs the feed in the feed box 30, so that the feed in the feed box 30 moves. The moving feed can better float out through the discharge hole 31, and thus can better attract the fish, so that the small fish can effectively swim out from the fish outlet 29 under the attraction of the feed.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A field catching device for cutthroat fish, comprising a floating body (1), characterized in that: The invention also comprises a depth adjustment component and a plurality of fishing components, wherein the depth adjustment component comprises a plurality of winding rollers (2) and traction ropes (3), wherein the plurality of traction ropes (3) are respectively wound around the outside of the plurality of winding rollers (2), and the fishing component comprises a trapping cage (8), wherein the ends of the plurality of traction ropes (3) away from the winding rollers (2) are respectively fixedly connected to the plurality of trapping cages (8), and the depth adjustment component retracts and releases the traction ropes (3) by rotating the winding rollers (2), thereby adjusting the placement depth of the trapping cages (8).

2. A field catching device for cutthroat fish according to claim 1, characterized in that: A plurality of groups of brackets (4) are fixedly mounted on the inner wall of the floating body (1), a winding shaft (5) is rotatably mounted between the inner walls of each group of the brackets (4), a plurality of winding rollers (2) are respectively fixedly mounted on the outer walls of the plurality of winding shafts (5), a rotating shaft (6) is fixedly mounted on one end of each winding shaft (5), and an end of the rotating shaft (6) away from the winding shaft (5) passes through the floating body (1) and is fixedly mounted with a rotating ring (7).

3. A field catching device for cutthroat fish according to claim 2, characterized in that: A plurality of positioning frames (9) are fixedly mounted on the outer wall of the floating body (1), a limiting ring (10) is fixedly mounted on the top of the positioning frame (9), the traction rope (3) passes through the inner side of the limiting ring (10), a bottom plate (11) is fixedly mounted on the top of the positioning frame (9), a clamping plate (12) is arranged above the bottom plate (11), a sliding column (13) is fixedly mounted on the top of the bottom plate (11), the outer wall of the sliding column (13) is slidably connected to the inner wall of the clamping plate (12), a threaded rod (14) is rotatably mounted on the inner wall of the bottom plate (11), the outer wall of the threaded rod (14) is threadedly connected to the inner wall of the clamping plate (12), a knob (15) is fixedly mounted on one end of the threaded rod (14), and the traction rope (3) is fixed through the bottom plate (11) and the clamping plate (12).

4. A field catching device for cutthroat fish according to claim 3, characterized in that: The outer wall of the trapping cage (8) is provided with a water-permeable hole (16); a plurality of trapping tubes (17) are evenly and fixedly mounted on the inner wall of the trapping cage (8); a hinge A (18) is fixedly mounted on the outer wall of the trapping tube (17); the trapping tube (17) is hingedly connected to a sealing baffle (19) via the hinge A (18); a hinge B (20) is fixedly mounted on the outer wall of the sealing baffle (19); an automatic telescopic rod (21) is fixedly mounted on the top of the inner wall of the trapping cage (8); a lifting plate (22) is fixedly mounted on one end of the automatic telescopic rod (21); a plurality of hinges C (23) are fixedly mounted on the outer wall of the lifting plate (22); a connecting rod (24) is hingedly connected between the plurality of hinges C (23) and the corresponding hinges B (20).

5. A field catching device for cutthroat fish according to claim 4, characterized in that: A lifting frame (25) is fixedly mounted on the outer wall of the lifting plate (22), a plurality of connecting blocks (26) are fixedly mounted on the outer wall of the lifting frame (25), a vertical rod (27) is fixedly mounted on the bottom of the connecting block (26), a stopper (28) is fixedly mounted on one end of the vertical rod (27), and a plurality of fish outlet holes (29) are opened at the bottom of the inner wall of the trapping cage (8), and the plurality of fish outlet holes (29) are respectively located above the plurality of stoppers (28).

6. A field catching device for cutthroat fish according to claim 5, characterized in that: A feed box (30) is slidably mounted on the inner wall of the blocking seat (28), a discharge hole (31) is opened on the top of the blocking seat (28), a guide rail (32) is symmetrically fixedly mounted on the top of the blocking seat (28), a shielding plate (33) is slidably mounted between the two guide rails (32), an inclined block (34) is fixedly mounted on the top of the shielding plate (33), a vertical plate (35) is fixedly mounted on the top of the blocking seat (28), an elastic member (36) is fixedly mounted between the vertical plate (35) and the inclined block (34), and an extension block (37) is fixedly mounted on the bottom of the inner wall of the trapping cage (8) and on one side of the fish discharge hole (29).

7. A field catching device for cutthroat fish according to claim 6, characterized in that: A shell (38) is fixedly mounted on the outer wall of the vertical plate (35), and the inner wall of the shell (38) is slidably connected to the outer wall of the inclined block (34). A magnet A (39) and a magnet B (40) are symmetrically fixedly mounted on the inner walls of the blocking seat (28) and the feed box (30), respectively, and the magnet B (40) and the magnet A (39) are magnetically attracted to each other.

8. A field catching device for cutthroat fish according to claim 7, characterized in that: A stirring shaft (41) is rotatably mounted on the inner wall of the feed box (30); a rotating seat (42) is fixedly mounted on one end of the stirring shaft (41) and located outside the feed box (30); a plurality of fan blades (43) are evenly fixedly mounted on the outer wall of the rotating seat (42); and a stirring rod (44) is fixedly mounted on the inner wall of the stirring shaft (41) and located inside the feed box (30).

9. A field catching device for cutthroat fish according to claim 8, characterized in that: A connecting rod (45) is fixedly installed on the top of the inner wall of the trapping cage (8), and the connecting rod (45) is slidably connected to the lifting plate (22). A light source box (46) is fixedly installed on one end of the connecting rod (45), and a plurality of light-emitting lamps (47) are fixedly installed on the inner wall of the light source box (46). The plurality of light-emitting lamps (47) are respectively aligned with a plurality of trapping tubes (17), and a photovoltaic panel (48) is fixedly installed on the top of the floating body (1).

10. A field catching device for cutthroat fish according to claim 9, characterized in that: A marking flag (49) is inserted at the top of the floating body (1), a connecting rope (50) is fixedly installed at the bottom of the floating body (1), a fixed anchor (51) is fixedly installed at one end of the connecting rope (50) away from the floating body (1), a fish retrieval tube (52) is fixedly installed on the inner wall of the bottom of the trapping cage (8), and a sealing valve (53) is threadedly installed on the inner wall of the fish retrieval tube (52).

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