Fry collecting device

Abstract

The invention provides a fry collecting device. Comprising a mounting frame, a collecting basket is arranged on the mounting frame, and a plurality of fish inlets are formed in the collecting basket; the collecting basket comprises an outer basket and an inner basket, and the inner basket is arranged in the outer basket; a lifting mechanism is further arranged on the mounting frame; the lifting mechanism is connected with any one of the outer basket and the inner basket, and an up-down limiting mechanism for preventing the inner basket and the outer basket from being separated in the up-down direction is arranged between the inner basket and the outer basket; a plurality of outer fish inlet holes are formed in the side wall of the outer basket, and inner fish inlet holes are formed in the corresponding positions of the side wall of the inner basket; the side wall provided with the outer fish inlet hole is in sliding contact with the corresponding side wall provided with the inner fish inlet hole, and the lifting mechanism drives the side wall of the outer basket and the side wall of the inner basket to slide relatively, so that the size of a fish inlet formed by the outer fish inlet hole and the inner fish inlet hole is changed. The fish fries are automatically collected through cooperation of the lifting mechanism, the inner basket and the outer basket.

Description

Technical Field

[0001] The invention belongs to the field of river fish protection and proliferation, and particularly relates to a fry collecting device. Background Art

[0002] Fish passage facilities at hydraulic dams not only transport fish upstream but also fish fry from upstream. In the upstream reservoir, there are spawning areas where fish need to be harvested as fry. This typically involves using specialized nets in the water from fishing boats to collect the fry, a cumbersome and labor-intensive process.

[0003] Existing fry collection devices, such as the marine fishing device disclosed in patent CN214339516U and the fry catching and screening device disclosed in patent CN222485834U, often utilize a fry box or net with a dedicated fry inlet at the bottom of the box to capture the fry. Some fry may escape from the fry inlet during the catching process. Furthermore, these devices often have too few fry inlets and too small an inlet diameter, resulting in slow fry entry. Larger inlet diameters can result in varying sizes of fry entering, requiring further structure to separate fry of varying sizes, leading to complex structures. Furthermore, existing fry collection devices lack a high degree of automation. Summary of the Invention

[0004] The invention provides a fry collecting device.

[0005] The objective of the present invention is achieved in the following manner: a fry collecting device comprises a mounting frame, a collecting basket is arranged on the mounting frame, and a plurality of fish inlets are arranged on the collecting basket; the collecting basket comprises an outer basket and an inner basket, and the inner basket is arranged inside the outer basket; a lifting mechanism is also arranged on the mounting frame; the lifting mechanism is connected to either the outer basket or the inner basket, and an upper and lower limit mechanism is arranged between the inner basket and the outer basket to prevent the two from separating in the upper and lower directions; a plurality of external fish inlet holes are arranged on the side wall of the outer basket, and internal fish inlet holes are arranged at corresponding positions on the side wall of the inner basket; the side wall with the external fish inlet holes is in sliding contact with the corresponding side wall with the internal fish inlet holes, and the lifting mechanism drives the side wall of the outer basket and the side wall of the inner basket to slide relative to each other, so that the size of the fish inlet composed of the external fish inlet holes and the internal fish inlet holes changes.

[0006] The upper end of the outer basket is connected to the lifting mechanism, and the left and right sides of the upper end of the inner basket extend out of the outer basket and a lower limit mechanism is set between the mounting frame on the corresponding side; a guide mechanism is set between the left and right sides of the mounting frame and the left and right sides of the upper end of the outer basket; or the upper end of the inner basket is connected to the lifting mechanism, and a lower limit mechanism is set between the outer basket and the mounting frame to limit the outer basket to the lowermost position of the mounting frame.

[0007] The mounting frame includes two parallel vertical trough structures, the outer basket includes an outer basket body with an open upper end, and a sliding frame arranged at the upper end of the outer basket body and facing upward; an outer basket beam is arranged at the upper end of the sliding frame; the left and right sides of the sliding frame are respectively slidably arranged in the trough structures on the corresponding sides; the outer basket beam is connected to the lifting mechanism; the inner basket includes an inner basket body and a fixed frame fixedly arranged at the upper end of the inner basket body and facing upward; an inner basket beam is arranged at the upper end of the fixed frame, and a long hole is provided in the sliding frame of the outer basket corresponding to the position of the inner basket beam; both ends of the inner basket beam pass through the long holes on the corresponding sides to reach the trough structure, and the long hole and the inner basket beam constitute the upper and lower limit mechanisms; a limiting surface is provided at the lower end of the trough structure, and both ends of the inner basket beam are arranged above the limiting surface and between the limiting surface to constitute the lower limit mechanism.

[0008] The sliding frame includes two rectangular tubes arranged in parallel at the upper end of the outer basket body; the outer basket crossbeam connects the upper ends of the two rectangular tubes; sliders are respectively provided in the front and rear directions of the rectangular tubes, and the sliders on both sides are respectively slidably connected to the front and rear side surfaces of the trough structure; the long hole is provided on the rectangular tube; a support block is provided at the lower end of the bottom surface of the trough structure, and the upper surface of the support block is the limiting surface.

[0009] The inner basket is in the shape of a box with an open upper end, and a fish suction pipe connected to a fish suction pump is provided on one side of the inner basket; the other side of the fish suction pump is connected to a storage box through a pipeline, and the inner fish inlet holes arranged in an array are provided on all or part of the remaining positions on the side of the inner basket; the outer fish inlet holes are arranged in an array at the positions corresponding to the inner fish inlet holes in the outer basket.

[0010] At least one of a fish attracting light or a bait throwing machine is arranged on the inner basket crossbeam.

[0011] A fish suction tube is provided on a part of the rear side surface of the inner basket, and a transparent panel is provided on the other part; a monitoring device is provided on the surface of the transparent panel located outside the inner basket; the monitoring device includes a waterproof frame fixedly provided on the outer surface of the transparent panel, the waterproof frame is a closed conical structure, a large opening at the front end is sealed with the transparent panel, and an underwater camera is provided at the small opening at the rear end, and the underwater camera is electrically connected to the control system; the outer basket is in the shape of a hollow box with no panels on the upper end and the rear side.

[0012] The front side, left side and right side of the outer basket body are provided with an array of external fish holes, and the external fish holes are vertical oblong holes; the front side, left side and right side of the inner basket body are provided with an array of internal fish holes, and the internal fish holes are circular holes; the minimum distance between two adjacent oblong holes is greater than the diameter of the circular hole.

[0013] The lifting mechanism includes a rocker arm hinged at one end on the mounting frame, and the other end of the rocker arm is hinged to one end of a connecting rod; the other end of the connecting rod is connected to the outer basket crossbeam; a lifting cylinder is also hingedly arranged between the mounting frame and the middle position of the connecting rod; the lifting cylinder is connected to the hydraulic system, and the hydraulic system is electrically connected to the control system.

[0014] The mounting frame is fixed on the hull, and the mounting frame also includes a connecting frame for fixing the trough structure to the hull; the rocker arm and the lifting cylinder of the lifting mechanism are hinged on the deck of the hull.

[0015] Compared with the existing technology, the present invention fixes a fry collection device on the side of the ship, and realizes automatic collection of fry through the cooperation of the lifting mechanism and the inner and outer baskets. The collection process can be automated, the collection efficiency is high, and it does not affect the navigation of the fishing boat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of the fry collecting device.

[0017] Figure 2 This is a schematic diagram of the cutaway of the outer and inner baskets (the corresponding transparent panels in front of the waterproof frame are hidden).

[0018] Figure 3 This is a schematic diagram of the coordination between the outer basket and the inner basket.

[0019] Figure 4 Schematic diagram of the fry collecting device in the raised position.

[0020] Figure 5 This is a schematic diagram of the mounting bracket.

[0021] Figure 6 This is a schematic diagram of the inner basket.

[0022] Figure 7 It is a schematic diagram of the outer basket structure.

[0023] Among them, 1 is the mounting frame, 11 is the trough structure, 12 is the connecting frame, 13 is the supporting block, 2 is the outer basket, 21 is the sliding frame, 211 is the rectangular tube, 214 is the long hole, 22 is the outer basket body, 221 is the outer fish inlet hole, 23 is the slider, 24 is the outer basket beam, 3 is the inner basket, 31 is the inner basket body, 311 is the inner fish inlet hole, 312 is the transparent panel, 32 is the fixing frame, 321 is the inner frame beam, 4 is the monitoring device, 41 is the waterproof frame, 42 is the underwater camera, 5 is the fish suction pump, 51 is the fish suction tube, 6 is the storage box, 7 is the fish attracting light, 8 is the bait casting machine, 9 is the lifting mechanism, 91 is the connecting rod, 92 is the lifting cylinder, 93 is the rocker arm, 94 is the hydraulic system, 10 is the control system, and 100 is the hull. DETAILED DESCRIPTION

[0024] In this application, unless otherwise specified or limited, the technical terms used herein shall have the ordinary meanings understood by persons skilled in the art. Terms such as "connected," "attached," "fixed," and "disposed" should be interpreted broadly and may refer to fixed, removable, or integral connections; direct or indirect connections through an intermediary; and mechanical or electrical connections. Unless otherwise specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact or indirect contact through an intermediary. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature. Relational terms such as first and second are used solely to distinguish one entity or operation from another and do not necessarily require or imply any actual relationship or order between these entities or operations. The terms used in the description, such as "center", "transverse", "longitudinal", "length", "width", "thickness", "height", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "clockwise", "counterclockwise", etc., to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation.

[0025] The following will provide a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings and specific embodiments. Figure 1-7As shown, a fry collection device includes a mounting frame 1, a collection basket disposed on the mounting frame 1, and a plurality of fish inlets disposed on the collection basket. The collection basket includes an outer basket 2 and an inner basket 3, the inner basket 3 disposed within the outer basket 2. The mounting frame 1 is also provided with a lifting mechanism 9. The lifting mechanism 9 is connected to either the outer basket 2 or the inner basket 3, and an upper and lower limit mechanism is provided between the inner basket 3 and the outer basket 2 to prevent the two from separating in the vertical direction. The sidewalls of the outer basket 2 are provided with a plurality of external fish inlet holes 221, and the sidewalls of the inner basket 3 are provided with corresponding internal fish inlet holes 311. The sidewalls of the external fish inlet holes 221 and the corresponding sidewalls of the internal fish inlet holes 311 are in sliding contact, and the lifting mechanism 9 drives the sidewalls of the outer basket 2 and the sidewalls of the inner basket 3 to slide relative to each other, thereby changing the size of the fish inlet formed by the external fish inlet holes 221 and the internal fish inlet holes 311. The mounting frame 1 can be provided with a fixing mechanism to secure it to a boat or other object. The upper and lower limit mechanisms can be structures such as slots and shafts, as long as they effectively limit the distance of up and down movement. At least one of the outer basket 2 and inner basket 3 can be barrel-shaped or box-shaped, formed by a base plate and side panels surrounding the base plate. The other of the outer basket 2 and inner basket 3 can also be barrel-shaped or box-shaped, with a base plate and side panels, or it can be devoid of a base plate and have only one or more side panels, which function to move up and down to change the shape of the fish inlet. The lifting mechanism 9 is electrically connected to the control system 10, enabling automatic control of lifting and lowering. The lifting mechanism 9 can be any existing mechanism, such as a hydraulic cylinder, a four-bar linkage 91 mechanism using a hydraulic cylinder or an electric motor, a connecting rod 91 slider 23 mechanism, or the like, as long as it can drive either the inner basket 3 or the outer basket 2 of the collection basket up and down. In the present invention, the side walls of the outer basket 2 and the side walls of the inner basket 3 are in sliding contact, with no gap between the two side walls or a small gap between them. The gap here should be small, smaller than the size of the fry, to prevent the fry from entering the gap through the outer fish inlet hole 221 and then into the inner fish inlet hole 311 when the inner and outer holes are misaligned and closed. Alternatively, the fry could pass through the inner fish inlet hole 311 in the inner basket 3, reach the gap, and then escape out of the outer fish inlet hole 221. In the present invention, multiple fish inlets are provided on the sidewalls of the collection frame, improving fry collection efficiency. Furthermore, the lifting mechanism 9 improves the overlap between the outer fish inlet hole 221 and the inner fish inlet hole 311, allowing the inlets to be opened or closed and their sizes to be changed, thereby adjusting fry collection efficiency and preventing fry escape.

[0026] The upper end of the outer basket 2 is connected to the lifting mechanism 9, and the left and right sides of the upper end of the inner basket 3 extend out of the outer basket 2 and are provided with lower limit mechanisms between the corresponding mounting frame 1. A guide mechanism is provided between the left and right sides of the mounting frame 1 and the left and right sides of the upper end of the outer basket 2. Alternatively, the upper end of the inner basket 3 is connected to the lifting mechanism 9, and a lower limit mechanism is provided between the outer basket 2 and the mounting frame 1 to limit the outer basket 2 to the lowest position of the mounting frame 1. The frame not connected to the lifting mechanism 9 can be fixed to the mounting frame 1 or can be slid up and down on the mounting frame 1. In a structure where both the inner basket 3 and the outer basket 2 are movable, the inner basket 3 and the outer basket 2 can move downward as a whole under the action of the lifting mechanism 9 due to their interlocking relationship. When the inner basket 3 or the outer basket 2 connected to the lifting mechanism 9 moves to the position of the limit mechanism, it cannot move further. At this time, the other frame continues to move under the guidance of the lifting mechanism 9 to achieve the change of the misalignment and overlap of the inner fish inlet 311 and the outer fish inlet 221. The lower limit mechanism can be a common structure such as a limit block, a limit surface, or a limit slot. The guide mechanism can be a common structure, such as a guide rail slider 23 mechanism, a groove and guide rail matching structure, or a groove and slider 23 matching structure. Specifically, for example, guide rails are provided on the left and right sides of the mounting frame 1, and sliders 23 are provided on both sides of the upper end of the outer basket 2. The cooperation between the guide rails and the sliders 23 ensures the upward and downward movement of the outer basket 2.

[0027] The mounting frame 1 includes two parallel vertical trough structures 11, the outer basket 2 includes an outer basket body 22 with an open top, a sliding frame 21 provided at the top of the outer basket body 22 and extending upward; an outer basket crossbeam 24 is provided at the top of the sliding frame 21; the left and right sides of the sliding frame 21 are respectively slidably provided in the trough structures 11 on the corresponding sides; the outer basket crossbeam 24 is connected to the lifting mechanism 9; the inner basket 3 includes an inner basket body 31 and a fixing frame 32 fixed at the top of the inner basket body 31 and extending upward An inner basket crossbeam 321 is provided at the upper end of the fixed frame 32, and an elongated hole 214 is provided on the sliding frame 21 of the outer basket 2 at a position corresponding to the inner basket crossbeam 321. The two ends of the inner basket crossbeam 321 pass through the elongated holes 214 on the corresponding sides and reach into the trough structure 11. The elongated holes 214 and the inner basket crossbeam 321 constitute the upper and lower limit mechanisms. A limit surface is provided at the lower end of the trough structure 11, and the two ends of the inner basket crossbeam 321 are arranged above and between the limit surfaces to constitute the lower limit mechanism. The term "vertical" herein includes a trough structure 11 that is completely vertical in its length direction, as well as a trough structure 11 that is tilted at a certain angle in the vertical, left, right, and front-to-back directions. As long as relative vertical movement between the inner basket 3 and the outer basket 2 is possible, it is sufficient. The length direction of the elongated hole 214 is in the vertical direction, thereby allowing a certain relative movement distance between the inner basket 3 and the outer basket 2. The inner fish inlet holes 311 and the outer fish inlet holes 221 are arranged in an array in the vertical and left-right directions. When the inner basket cross beam 321 is at the bottom of the long hole 214 of the outer basket 2, the outer fish inlet 221 and the inner fish inlet are completely staggered, and the fish inlet is in a closed state.

[0028] The sliding frame 21 includes two rectangular tubes 211 arranged parallel to the upper ends of the outer basket 22; the outer basket crossbeam 24 connects the upper ends of the two rectangular tubes 211; sliders 23 are respectively provided in the front and rear directions of the rectangular tubes 211, and the sliders 23 on both sides are respectively slidably connected to the front and rear side surfaces of the trough structure; the long hole 214 is provided on the rectangular tube 211; the lower end of the bottom surface of the trough structure 11 is provided with a support block 13, and the upper surface of the support block 13 serves as the limiting surface. Here, the rectangular tube 211 can be a hollow tubular structure or a solid rectangular parallelepiped structure. The two rectangular tubes 211 are respectively provided in the left and right directions of the outer basket 2, and the front and rear directions are perpendicular to the left and right directions. The left side surface of the left rectangular tube 211 or the right side surface of the right rectangular tube 211 can also be provided with a slider 23, and contact is made between the slider 23 and the bottom surface of the trough structure 11 on the corresponding side. At this time, the slider 23 is located above the long hole 214, so as to facilitate the up and down movement of the inner basket beam 321. Guide rails and other structures can also be set at the positions of the slider 23 on the front and rear sides of the trough structure 11 to achieve guidance. When the two ends of the inner basket beam 321 move to the upper surface of the support block 13, the inner basket beam 321 and the inner basket 3 stop moving downward. The upper surface of the support block 13 can be semicircular, corresponding to the shape of the inner basket beam 321. The fixing frame 32 can also include two mounting tubes or mounting plates arranged in parallel at the upper end of the inner basket body 31, and the inner basket beam 321 is connected to and passes through the two mounting tubes or mounting plates.

[0029] The inner basket 31 is shaped like a box with an open top. A fish suction pipe 51 connected to a fish suction pump 5 is provided on one side of the inner basket 31. The other side of the fish suction pump 5 is connected to a storage tank 6 via a pipe. The inner fish inlet holes 311 are arranged in an array on all or part of the remaining sides of the inner basket 31. The outer basket 22 has outer fish inlet holes 221 arranged in an array corresponding to the positions of the inner fish inlet holes 311. The fish suction pump 5 can be placed on the deck of a fishing boat or elsewhere to quickly draw fish and water from the inner basket 31 into the storage tank 6. The fish suction pipe 51 is preferably a flexible, retractable, corrugated fish suction pipe 51. The fish and water are drawn out from the lower rear side of the inner basket 31.

[0030] The inner basket crossbeam 321 is provided with at least one of a fish-attracting light 7 and a bait dispenser 8. The fish-attracting light 7 emits light of a specific color based on the phototropism of the target fish fry, projecting the light into the water. The bait dispenser 8 is also fixed to the inner basket crossbeam 321 and periodically releases bait into the water of the inner basket 3 based on the target fish fry's feeding preferences.

[0031] A portion of the rear side of the inner basket 31 is provided with a fish suction tube 51, and another portion is provided with a transparent panel 312. A monitoring device 4 is provided on the surface of the transparent panel 312 located outside the inner basket 31. The monitoring device 4 comprises a waterproof frame 41 fixedly mounted on the outer surface of the transparent panel 312. The waterproof frame 41 is a sealed conical structure with a large front opening hermetically connected to the transparent panel 312 and a small rear opening housing an underwater camera 42 electrically connected to the control system 10. The outer basket 22 is a hollow box with no panels on the top or rear. The mounting frame 1 is placed on the hull 100 or other fixed or mobile device. The side closest to the device may be the rear side of the inner basket 31, and the opposite side may be the front side of the inner basket 31. The transparent panel 312 may be made of transparent glass or plastic. The monitoring device 4 can capture images of the interior of the inner basket 3 through the transparent panel. Figure 2 To illustrate the structure of the waterproof frame 41, the transparent panel 312 at the front of the waterproof frame 41 is hidden. In reality, the transparent panel 312 is a single rectangular plate that completely covers the large opening at the front of the waterproof frame 41. The enclosed space between the waterproof frame 41 and the transparent panel 312 is preferably free of water and filled with air, providing improved light transmittance. The underwater camera 42 is mounted on the end of the waterproof frame 41 away from the inner housing 31. This greater distance from the inner housing 31 facilitates focusing and a wider field of view. The underwater camera 42 captures images through the transparent panel 312. The securing method between the waterproof frame and the transparent panel 312 utilizes existing technology, and the connection can be sealed using existing underwater sealing methods, such as sealing strips. The cables for the underwater camera 42, the fish attractant light 7, and the baitcaster 8 can be connected to the control system 10 after being assembled.

[0032] The front side, left side, and right side of the outer basket 22 are provided with an array of outer fish holes 221, which are vertical oblong holes; the front side, left side, and right side of the inner basket 31 are provided with an array of inner fish holes 311, which are circular holes; the minimum distance between two adjacent oblong holes is greater than the diameter of the circular hole. The size of the oblong hole corresponds to the size of the circular hole, and the position corresponds. The diameter of the circular hole and the diameter of the oblong hole can preferably be roughly the same, which is related to the size of the target fry, to prevent large fish from entering the basket. Of course, the outer fish holes 221 and the inner fish holes 311 can also be of other shapes and sizes, as long as they can meet the requirements of changing the size of the fish inlet and closing the fish inlet by moving the inner basket 3 or the outer basket 2 up and down.

[0033] The lifting mechanism 9 includes a swing arm 93 hingedly mounted on the mounting frame 1 at one end. The other end of the swing arm 93 is hingedly mounted on one end of a connecting rod 91. The other end of the connecting rod 91 is connected to the outer basket crossbeam 24. A lifting cylinder 92 is also hingedly mounted between the mounting frame 1 and the connecting rod 91. The lifting cylinder 92 is connected to a hydraulic system 94, which is electrically connected to the control system 10. The hydraulic system 94 provides power to the lifting cylinder 92 and is controlled by the control system 10.

[0034] The mounting frame 1 is fixed to the hull 100 and also includes a connecting frame 12 for securing the trough structure 11 to the hull 100. The rocker arm 93 and the lifting cylinder 92 of the lifting mechanism 9 are hingedly connected to the deck of the hull 100. The trough structure 11 can be secured to the deck and side of the hull 100 via a plurality of connecting frames 12. The trough structure 11 is arranged vertically at a distance from the side of the hull. The fish suction pump 5, the storage tank 6, the control system 10, the hydraulic system 94, and other components can all be installed within the hull 100 and move with the hull 100.

[0035] The control system 10 can receive image signals from the monitoring device 4 and can control the fish suction pump 5, the hydraulic system 94 of the lifting device, the fish attracting light 7 and the bait casting machine 8. The control system 10 is also provided with control buttons for manual control of various devices.

[0036] To collect target fry, the fishing boat's hull 100 is first stopped at the fry gathering location. The operator, through the control system 10, retracts the lifting cylinder 92 of the lifting mechanism 9. This retracts the lifting cylinder 92, which in turn drives the connecting rod 91, which in turn drives the outer basket crossbeam 24 downward. The outer basket 2 slides downward within the slotted structure 11 of the mounting frame 1 via the slider 23 on the sliding frame 21. At this point, the inner basket crossbeam 321 hangs from the bottom of the elongated hole 214 of the sliding frame 21 of the outer basket 2. The array of inner fish inlet holes 311 in the inner basket 3 and the array of outer fish inlet holes 221 in the outer basket 2 do not overlap. The outer basket 2 and inner basket 3 continue to slowly descend into the water. The outer basket 2, with its open structure, allows for smooth entry into the water. A gap exists between the inner basket 3 and the outer basket 2, allowing the inner basket 3 to also slowly enter the water. The inner basket crossbeam 321 eventually lands on the support block 13 of the mounting frame 1. The lifting mechanism 9 then drives the outer basket 2 down a certain distance, allowing the inner fish inlet 311 of the inner basket 3 to overlap with the outer fish inlet 221 of the outer basket. At this point, the fry can enter the inner basket 3 through the arrays on the inner and outer baskets 3 and 2. The size of the overlap can also be adjusted to control the size of the fry entering.

[0037] As the outer basket 2 and inner basket 3 descend, the bellows 51 of the fish suction pump 5 can freely expand and contract, without dragging the inner basket 2 downward. The operator can then activate the fish attracting light 7 and the bait dispenser 8 via the control system 9 to increase the speed of fry collection. The monitoring device 4 takes photos of the fry accumulation in the inner basket 3 at regular intervals, and the control system 10 determines the density. When the density reaches a set standard, the control system 10 automatically activates the lifting mechanism to lift the outer basket a small distance, aligning the inner fish inlet holes 311 of the inner basket 3 with the outer fish inlet holes 221 of the outer basket. This prevents the fry from escaping through the holes. At this point, the control system 10 restarts the fish suction pump 5, pumping the fish and water from the inner basket 3 into the storage tank 6 on the deck. After the specified period of fish absorbing, the fish suction pump 5 is shut down, and the control system 10 restarts the lifting mechanism 9 to lower the outer basket 2 a small distance, aligning the inner circle 311 of the inner basket 3 with the outer circle 221 of the outer basket, allowing the next round of fish collection to begin. When the operator stops attracting fish, they turn off the fish attracting light 7 and bait dispenser 8. The control system 10 then operates the lifting cylinder 92 of the lifting mechanism 9. The connecting rod 9 drives the outer basket crossbeam 24 upward. When the bottom of the elongated circular hole 214 in the outer basket slide 21 contacts the inner basket crossbeam 321, the inner basket 3 is pulled upward along with it. This continues until both the inner basket 3 and the outer basket 2 are completely clear of the water. Once lifted out of the water, they no longer affect the navigation of the fishing boat.

[0038] The present invention fixes a fry collecting device on the side of a ship, realizes automatic collection of fry through the cooperation of a lifting mechanism and inner and outer baskets, and the collection process can be automated with high collection efficiency without affecting the navigation of the fishing boat.

[0039] The various technical features of the above-described embodiments may be arbitrarily combined, and as long as there is no contradiction in the combination of these technical features, they shall be considered to be within the scope of this specification. Without departing from the overall concept of the present invention, the technical solutions according to the present invention and their equivalent replacement or modification, as well as the various changes and improvements made thereto, shall also be considered to be within the scope of protection of the present invention.

Claims

1. A fry collecting device, characterized in that: The fish collecting basket comprises a mounting frame, on which a collecting basket is provided, and a plurality of fish inlets are provided on the collecting basket; the collecting basket comprises an outer basket and an inner basket, and the inner basket is provided inside the outer basket; a lifting mechanism is also provided on the mounting frame; the lifting mechanism is connected to either the outer basket or the inner basket, and an upper and lower limit mechanism is provided between the inner basket and the outer basket to prevent the two from separating in the upper and lower directions; a plurality of external fish inlet holes are provided on the side wall of the outer basket, and internal fish inlet holes are provided at corresponding positions on the side wall of the inner basket; the side wall provided with the external fish inlet holes and the corresponding side wall provided with the internal fish inlet holes are in sliding contact, and the lifting mechanism drives the side wall of the outer basket and the side wall of the inner basket to slide relative to each other, so that the size of the fish inlet formed by the external fish inlet holes and the internal fish inlet holes changes.

2. A fry collecting device according to claim 1, characterized in that: The upper end of the outer basket is connected to the lifting mechanism, and the left and right sides of the upper end of the inner basket extend out of the outer basket and a lower limit mechanism is set between the mounting frame on the corresponding side; a guide mechanism is set between the left and right sides of the mounting frame and the left and right sides of the upper end of the outer basket; or the upper end of the inner basket is connected to the lifting mechanism, and a lower limit mechanism is set between the outer basket and the mounting frame to limit the outer basket to the lowermost position of the mounting frame.

3. A fry collecting device according to claim 2, characterized in that: The mounting frame includes two parallel vertical trough structures, the outer basket includes an outer basket body with an open upper end, and a sliding frame arranged at the upper end of the outer basket body and facing upward; an outer basket beam is arranged at the upper end of the sliding frame; the left and right sides of the sliding frame are respectively slidably arranged in the trough structures on the corresponding sides; the outer basket beam is connected to the lifting mechanism; the inner basket includes an inner basket body and a fixed frame fixedly arranged at the upper end of the inner basket body and facing upward; an inner basket beam is arranged at the upper end of the fixed frame, and a long hole is provided in the sliding frame of the outer basket corresponding to the position of the inner basket beam; both ends of the inner basket beam pass through the long holes on the corresponding sides to reach the trough structure, and the long hole and the inner basket beam constitute the upper and lower limit mechanisms; a limiting surface is provided at the lower end of the trough structure, and both ends of the inner basket beam are arranged above the limiting surface and between the limiting surface to constitute the lower limit mechanism.

4. A fry collecting device according to claim 3, characterized in that: The sliding frame includes two rectangular tubes arranged in parallel at the upper end of the outer basket body; the outer basket crossbeam connects the upper ends of the two rectangular tubes; sliders are respectively provided in the front and rear directions of the rectangular tubes, and the sliders on both sides are respectively slidably connected to the front and rear side surfaces of the trough structure; the long hole is provided on the rectangular tube; a support block is provided at the lower end of the bottom surface of the trough structure, and the upper surface of the support block is the limiting surface.

5. The fry collecting device according to claim 3, characterized in that: The inner basket is in the shape of a box with an open upper end, and a fish suction pipe connected to a fish suction pump is provided on one side of the inner basket; the other side of the fish suction pump is connected to a storage box through a pipeline, and the inner fish inlet holes arranged in an array are provided on all or part of the remaining positions on the side of the inner basket; the outer fish inlet holes are arranged in an array at the positions corresponding to the inner fish inlet holes in the outer basket.

6. A fry collecting device according to claim 5, characterized in that: At least one of a fish attracting light or a bait throwing machine is arranged on the inner basket crossbeam.

7. The fry collecting device according to claim 5, characterized in that: A fish suction tube is provided on a part of the rear side surface of the inner basket, and a transparent panel is provided on the other part; a monitoring device is provided on the surface of the transparent panel located outside the inner basket; the monitoring device includes a waterproof frame fixedly provided on the outer surface of the transparent panel, the waterproof frame is a closed conical structure, a large opening at the front end is sealed with the transparent panel, and an underwater camera is provided at the small opening at the rear end, and the underwater camera is electrically connected to the control system; the outer basket is in the shape of a hollow box with no panels on the upper end and the rear side.

8. A fry collecting device according to claim 7, characterized in that: The front side, left side and right side of the outer basket body are provided with an array of external fish holes, and the external fish holes are vertical oblong holes; the front side, left side and right side of the inner basket body are provided with an array of internal fish holes, and the internal fish holes are circular holes; the minimum distance between two adjacent oblong holes is greater than the diameter of the circular hole.

9. The fry collecting device according to claim 3, characterized in that: The lifting mechanism includes a rocker arm hinged at one end on the mounting frame, and the other end of the rocker arm is hinged to one end of a connecting rod; the other end of the connecting rod is connected to the outer basket crossbeam; a lifting cylinder is also hingedly arranged between the mounting frame and the middle position of the connecting rod; the lifting cylinder is connected to the hydraulic system, and the hydraulic system is electrically connected to the control system.

10. The fry collecting device according to claim 9, characterized in that: The mounting frame is fixed on the hull, and the mounting frame also includes a connecting frame for fixing the trough structure to the hull; the rocker arm and the lifting cylinder of the lifting mechanism are hinged on the deck of the hull.

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