South American white shrimp catching device

Abstract

The utility model relates to fishing device technical field, specifically disclose the south American white prawn fishing device, including support mechanism, it includes guide rail, the link in two groups guide rail end portion between link frame and link in two groups link frame between mobile frame, mobile mechanism, it includes mounting frame, the guide piece that moves on the guide rail and the walking piece that walks on the mobile frame, main net cage, it includes net cage main part, the utility model mobile mechanism, main net cage, grading net cage and the setting of guide net curtain structure, can easily operate whole fishing process on the shore, need not water operation, avoided repeatedly round hunting, save time and effort, the adjustable frame of flexible regulation gap width, can in fishing site instant screening, achieve 'protecting young and leaving strong', be favorable to the implementation of resource sustainable utilization and round hunting round releasing breeding strategy, net curtain main part moves, the bottom is not cultivated and pastes lightly, protects pond membrane, and avoids violent agitating bottom mud.

Description

Technical Field

[0001] This utility model relates to the field of fishing device technology, specifically a fishing device for whiteleg shrimp. Background Technology

[0002] In current Pacific white shrimp harvesting operations, farmers generally rely on traditional tools such as dip nets, traps, and seine nets. These methods, in long-term practice, have severely limited harvesting efficiency, product quality, and aquaculture profitability.

[0003] Traditional fishing methods, especially trawls and heavy purse seines, violently agitate the pond bottom silt during operation. This not only causes instantaneous turbidity but also releases large amounts of toxic and harmful substances such as hydrogen sulfide and ammonia nitrogen, rapidly depleting dissolved oxygen and creating severe localized hypoxia. Shrimp are highly susceptible to severe stress under these adverse conditions, leading to decreased vitality, weakened constitution, and even mass mortality, directly impacting the survival rate of live shrimp during transportation and the final market quality. Existing fixed nets such as traps and purse seines suffer from drawbacks such as large disturbance areas and slow net retrieval, resulting in a consistently high escape rate per fishing operation. To achieve the expected yield, farmers are forced to conduct multiple and repeated purse seines, which undoubtedly increases labor time and intensity exponentially, especially in large ponds where labor costs are extremely high.

[0004] With the promotion of refined aquaculture models such as membrane-lined ponds (e.g., HDPE membrane ponds) and integrated lotus pond farming with ring ditches, the drawbacks of traditional netting are becoming increasingly apparent. Once the membrane is damaged, it will lead to water leakage, loss of water and fertilizer retention functions, and expensive maintenance costs. To address these issues, a shrimp harvesting device for Litopenaeus vannamei is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a device for catching whiteleg shrimp in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: South American white shrimp harvesting equipment, including The support mechanism includes guide rails, a connecting frame connecting the ends of two sets of guide rails, and a movable frame connecting the two sets of connecting frames. The moving mechanism includes a mounting frame, a guide that moves on a guide rail, and a traveling member that travels on the moving frame; The main cage includes a cage body, and the bottom of the mounting frame is connected to a lifting device for adjusting the height of the cage body; A graded net cage includes several net cage bodies disposed at the bottom of a net cage body. Each net cage body has a fishing opening on one side. The top of each net cage body is connected to the net cage body via a connecting cage. Several one-way guide strips are connected to the inside of the fishing opening. An adjusting component for adjusting the gap width is provided on the side of the net cage body away from the fishing opening. A guide net curtain includes a net curtain body placed between adjacent net cage bodies and outside the side net cage bodies, the bottom of the net curtain body being connected to a sliding edge.

[0007] In one alternative: the bottom of the guide rail is connected to several positioning stakes fixed on both sides of the pond or ditch.

[0008] In one alternative: the guide includes a movable seat, both sides of the mounting bracket are connected to the movable seat, and the bottom of the movable seat is connected to a guide seat that slides with the guide rail.

[0009] In one alternative: the traveling component includes a drive box mounted at the bottom of the mounting frame, with rollers mounted on both sides of the drive box for traveling on the connecting frame, and a power component for driving the rollers to rotate is installed inside the drive box.

[0010] In one alternative: the lifting device includes an electric hoist installed at the bottom of the mounting frame and a chain installed on the electric hoist; a lifting rope is installed at the top of the main body of the cage, and the lifting rope is connected to the bottom end of the chain; two sets of symmetrically arranged electric hoists are installed at the bottom of the mounting frame.

[0011] In one alternative: a first gate is installed on one side of the main body of the cage, and second gates are installed on both sides of the main body of the cage. The top of each cage body is connected to the bottom of the main body of the cage by four sets of traction ropes.

[0012] In one alternative: the adjusting component includes an adjusting frame, with gaps between adjacent crossbars within the adjusting frame; two sets of guide plates are connected to the side of the net cage body away from the fishing opening; the adjusting frame is slidably disposed between the two sets of guide plates; and a positioning screw that is threadedly engaged with the net cage body is connected to the top of the adjusting frame.

[0013] In one alternative: the top of the net curtain body is connected to the bottom of the net cage body, and the sliding edge is connected to the float via a hanging rope.

[0014] In one alternative: the opening size formed by the plurality of unidirectional guide strips on the side near the fishing port is larger than the opening size formed by the unidirectional guide strips on the side away from the fishing port.

[0015] Compared with the prior art, the beneficial effects of this utility model are: The design of this utility model, including the mobile mechanism, main net cage, graded net cage, and guide net curtain, allows for easy operation of the entire fishing process from the shore, eliminating the need for water work and avoiding repeated encirclement and trapping, thus saving time and labor. The adjustable frame, with its flexible gap width, enables on-site screening, ensuring the survival of juveniles and the retention of mature plants. This is beneficial for the sustainable use of resources and the implementation of rotational harvesting and stocking aquaculture strategies. During the movement of the main net curtain, the bottom is gently attached without being tilled, protecting the pond film and preventing violent stirring of the bottom mud.

[0016] In this invention, the one-way guide bar adopts a funnel-shaped opening design with a "large outer and small inner" shape. Shrimp can easily push open the one-way guide bar and enter the main body of the net cage. However, after entering, the elastic recovery of the one-way guide bar and the narrow end will form a physical barrier, effectively preventing them from escaping along the original path.

[0017] In this invention, the support mechanism and the moving mechanism can be set to specific dimensions according to the site conditions to adapt to ponds and ditches of different widths. The main cage's rapid lifting and transfer functions make harvesting operations safe and easy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the moving mechanism and the main cage in this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the main cage, the graded cage, and the guide net curtain in this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the graded mesh cage in this utility model.

[0022] Figure 5 This is a partial structural schematic diagram of the present invention.

[0023] Figure 6 This is a cross-sectional view of the graded mesh cage in this utility model.

[0024] In the diagram: 1. Support mechanism; 2. Moving mechanism; 3. Main cage; 4. Graded cage; 5. Guide curtain; 11. Guide rail; 12. Connecting frame; 13. Moving frame; 14. Positioning stake; 21. Mounting frame; 22. Moving seat; 23. Guide seat; 24. Drive box; 25. Roller; 26. Electric hoist; 27. Chain; 31. Main body of cage; 32. First gate; 33. Second gate; 34. Hanging rope; 41. Main body of cage; 42. Fishing opening; 43. Connecting cage; 44. Traction rope; 45. Adjusting frame; 46. Guide plate; 47. Positioning screw; 48. One-way guide bar; 51. Main body of curtain; 52. Sliding edge; 53. Float; 54. Hanging rope. Detailed Implementation

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-6 In this embodiment, the South American white shrimp harvesting device includes... The support mechanism 1 includes a guide rail 11, a connecting frame 12 connected between the ends of two sets of guide rails 11, and a movable frame 13 connected between the two sets of connecting frames 12. The moving mechanism 2 includes a mounting frame 21, a guide that moves on a guide rail 11, and a traveling member that travels on a moving frame 13. The main cage 3 includes a cage body 31, and the bottom of the mounting frame 21 is connected to a lifting component for adjusting the height of the cage body 31; The graded net cage 4 includes several net cage bodies 41 disposed at the bottom of the net cage body 31. A fishing port 42 is provided on one side of each net cage body 41. The top of each net cage body 41 is connected to the net cage body 31 through a connecting cage 43. Several one-way guide strips 48 are connected to the inside of the fishing port 42. An adjusting component for adjusting the gap width is provided on the side of the net cage body 41 away from the fishing port 42. And a guide net curtain 5, which includes a net curtain body 51 placed between adjacent net cage bodies 41 and outside the side net cage bodies 41, the bottom of the net curtain body 51 is connected to a sliding edge 52; the sliding edge 52 at the bottom of the net curtain body 51 is similar to a skid structure, ensuring that the guide net curtain slides rather than scrapes when moving on the bottom of the pond.

[0028] Please see Figure 1 The bottom of the guide rail 11 is connected to several positioning piles 14 fixed on both sides of the pond or ditch; specifically, the guide rail 11 is erected on the positioning piles, and the guide rail 11 and the moving frame 13 form a track on the top of the water surface.

[0029] Please see Figure 2 The guide includes a movable seat 22, and the movable seat 22 is connected to both sides of the mounting frame 21. The bottom of the movable seat 22 is connected to a guide seat 23 that slides with the guide rail 11. Specifically, when the mounting frame 21 moves, the guide seat 23 slides on the guide rail 11, so that the movable seat 22 and the mounting frame 21 move stably.

[0030] Please see Figure 2 The traveling component includes a drive box 24 installed at the bottom of the mounting frame 21. Rollers 25 that travel on the connecting frame 12 are installed on both sides of the drive box 24. A power component for driving the rollers 25 to rotate is installed inside the drive box 24. Specifically, the power component is a combination of existing waterproof servo motors, reducers, chain drive components, etc. The power component can drive the rollers 25 to roll on the connecting frame 12, thereby moving the mounting frame 21.

[0031] Please see Figure 2 The lifting device includes an electric hoist 26 installed at the bottom of the mounting frame 21 and a chain 27 installed on the electric hoist 26. A suspension rope 34 is installed on the top of the net cage body 31, and the suspension rope 34 is connected to the bottom end of the chain 27. Two sets of symmetrically arranged electric hoists 26 are installed at the bottom of the mounting frame 21. Specifically, the electric hoist 26 serves as a power source and raises or lowers the entire main net cage 3 by raising and lowering the chain 27. The first door 32 and the second door 33 are used to open after the harvesting is completed to collect and remove the captured shrimp.

[0032] Please see Figure 2 and 5 The main body 31 of the net cage is equipped with a first door 32 on one side and a second door 33 on both sides. The top of each net cage body 41 is connected to the bottom of the net cage body 31 by four sets of traction ropes 44. Specifically, the net cage body 31 is connected to the net cage body 41 below by traction ropes 44. In actual use, a light-attracting component can be set inside the net cage body 31. At night or in the early morning, the shrimp are attracted by light and water flow and swim towards the device. The shrimp push open the flexible one-way guide strip 48 from the fishing port 42 and enter the net cage body 41. Then, they enter the net cage body 31 through the connecting cage 43.

[0033] Please see Figure 4The adjusting component includes an adjusting frame 45, with gaps between adjacent crossbars within the adjusting frame 45. Two sets of guide plates 46 are connected to the side of the net cage body 41 away from the fishing opening 42. The adjusting frame 45 is slidably positioned between the two sets of guide plates 46. A positioning screw 47, threadedly engaged with the net cage body 41, is connected to the top of the adjusting frame 45. Specifically, the adjusting frame 45 changes the width of the gap between itself and the mesh openings on the side wall of the net cage body 41 by sliding. When shrimp entering the net cage attempt to find an exit, they can escape through the gap between the crossbars of the adjusting frame 45 and the mesh openings on one side of the net cage body 41. Smaller shrimp can escape through the gap and return to the pond to continue growing. Adult shrimp that have reached the required size cannot pass through the gap and, while searching for an exit, will swim upwards along the connecting cage 43, eventually gathering in the main net box 3 at the top. The operator fixes the position of the adjusting frame by rotating the positioning screw 47, thereby setting the size of shrimp allowed to pass through on-site. The positioning screw 47 can be made of plastic or rust-proof material.

[0034] Please see Figure 3 The top of the net curtain body 51 is connected to the bottom of the net box body 31, and the sliding edge 52 is connected to the float via the hanging rope 54. Specifically, the float provides upward buoyancy to the net curtain body 51, which, combined with the counterweight of the sliding edge 52, achieves the effect of the bottom of the net curtain body 51 lightly touching without tilling, protecting the pond film and avoiding violent stirring of the bottom mud.

[0035] Please see Figure 6 The opening size formed by several of the one-way guide strips 48 on the side near the fishing port 42 is larger than the opening size formed on the side of the one-way guide strip 48 away from the fishing port 42. Specifically, when shrimp enter the net cage from the fishing port 42, the one-way guide strip 48 adopts a funnel-shaped opening design with a "larger outside and smaller inside". The shrimp can easily push open the one-way guide strip 48 to enter the net cage body 41. However, after entering, the elastic recovery and narrow end of the one-way guide strip 48 will form a physical barrier, effectively preventing it from escaping along the original route.

[0036] The working principle of this utility model is as follows: The entire fishing module is moved by the moving mechanism 2, which can catch shrimp while moving slowly or move to the target position for catching. Shrimp enter the net cage body 41 from the fishing port 42. When the shrimp enter the net cage and try to find an exit, they will pass through the gap between the horizontal bar of the adjusting frame 45 and the mesh on one side of the net cage body 41. Smaller shrimp can escape through the gap and return to the pond to continue growing. Adult shrimp that have reached the required size cannot pass through the gap. In the process of finding an exit, they will swim upward along the connecting cage 43 and eventually enter the main net box 3 at the top to gather. After the catching is completed, the moving mechanism 2 moves the entire fishing module to a position on the shore for easy operation. The electric hoist 26 is started, and the main net box 3 and the graded net cage 4 below are lifted out of the water by the chain 27. The first door 32 and the second door 33 are opened to facilitate the removal of the caught whiteleg shrimp.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A device for catching whiteleg shrimp, characterized in that, include The support mechanism (1) includes a guide rail (11), a connecting frame (12) connected between the ends of the two sets of guide rails (11), and a movable frame (13) connected between the two sets of connecting frames (12). The moving mechanism (2) includes a mounting frame (21), a guide that moves on a guide rail (11), and a traveling member that travels on a moving frame (13); The main cage (3) includes a cage body (31), and the bottom of the mounting frame (21) is connected to a lifting component for adjusting the height of the cage body (31); A graded net cage (4) includes several net cage bodies (41) disposed at the bottom of a net cage body (31). One side of each net cage body (41) has a fishing opening (42). The top of each net cage body (41) is connected to the net cage body (31) via a connecting cage (43). Several one-way guide strips (48) are connected to the inside of each fishing opening (42). An adjusting element for adjusting the gap width is provided on the side of each net cage body (41) away from the fishing opening (42). The guide net curtain (5) includes a net curtain body (51) placed between adjacent net cage bodies (41) and outside the side net cage bodies (41), and the bottom of the net curtain body (51) is connected to a sliding edge (52).

2. The shrimp harvesting device according to claim 1, characterized in that: The bottom of the guide rail (11) is connected to several positioning stakes (14) fixed on both sides of the pond or ditch.

3. The shrimp harvesting device according to claim 1, characterized in that: The guide includes a movable seat (22), and the movable seat (22) is connected to both sides of the mounting bracket (21). The bottom of the movable seat (22) is connected to a guide seat (23) that slides with the guide rail (11).

4. The shrimp harvesting device according to claim 3, characterized in that: The walking component includes a drive box (24) installed at the bottom of the mounting frame (21). Rollers (25) that travel on the connecting frame (12) are installed on both sides of the drive box (24). A power component for driving the rollers (25) to rotate is installed inside the drive box (24).

5. The shrimp harvesting device according to claim 1, characterized in that: The lifting device includes an electric hoist (26) installed at the bottom of the mounting frame (21) and a chain (27) installed on the electric hoist (26). A hoisting rope (34) is installed on the top of the net cage body (31). The hoisting rope (34) is connected to the bottom end of the chain (27). Two sets of symmetrically arranged electric hoists (26) are installed at the bottom of the mounting frame (21).

6. The shrimp harvesting device according to claim 1, characterized in that: The first door (32) is installed on one side of the main body (31) of the net cage, and the second door (33) is installed on both sides of the main body (31). The top of each group of net cage main bodies (41) is connected to the bottom of the main body (31) of the net cage through four sets of traction ropes (44).

7. The shrimp harvesting device according to claim 1, characterized in that: The adjusting component includes an adjusting frame (45), with gaps between adjacent crossbars inside the adjusting frame (45). The main body of the net cage (41) is connected to two sets of guide plates (46) on the side away from the fishing port (42). The adjusting frame (45) is slidably disposed between the two sets of guide plates (46). The top of the adjusting frame (45) is connected to a positioning screw (47) that is threadedly engaged with the main body of the net cage (41).

8. The shrimp harvesting device according to claim 1, characterized in that: The top of the net curtain body (51) is connected to the bottom of the net box body (31), and the sliding edge (52) is connected to the float (53) by the hanging rope (54).

9. The shrimp harvesting device according to claim 1, characterized in that: The opening size formed by several of the unidirectional guide strips (48) on the side near the fishing port (42) is larger than the opening size formed by the unidirectional guide strips (48) on the side away from the fishing port (42).

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