A device for capturing farmed crabs in rice fields

Abstract

The application relates to the breeding technical field and discloses a device for capturing crab in rice field cultivation, which comprises a cage body, the bottom of the cage body is fixedly connected with a hollow bottom plate, entrance assemblies are installed on the two sides of the cage body, support tables are fixedly connected on the two sides of the top of the cage body, top covers are hingedly connected on the top of the support tables, side plates are fixedly connected on the two sides of the two top covers, a hollow platform is slidably connected in the cage body, a pull rod is fixedly connected in the middle of the hollow platform, support rods are arranged between the hollow platform and the top covers, and T-shaped guide rails are fixedly connected on the two sides of the top of the hollow platform. When the crabs are taken out, the crabs in the device can be gathered into two parts, and the crabs gathered on the two sides can be pushed out of the device and collected along with the opening of the device. Therefore, the user does not need to lift and move the crab catching cage when collecting the crabs, the crabs can be conveniently taken out, and the crab catching efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of aquaculture technology, specifically to a device for catching crabs raised in rice paddies. Background Technology

[0002] Crab traps are typically made of mesh material and are shaped like baskets or cages. They are placed in areas of rice paddies where crabs are likely to appear, such as the edges of the paddies or near waterways. Once crabs crawl inside the trap, they have difficulty escaping again. Therefore, these traps help rice paddy farmers effectively catch crabs, control their numbers, and manage the farming process.

[0003] Currently, most crab catching devices used in rice paddy farming require users to either pull up and tilt the cage or reach inside to retrieve the crabs after they are caught, as the crabs tend to gather inside the trap. Both methods are time-consuming and laborious. Therefore, this invention proposes a device for catching crabs raised in rice paddies. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a device for catching crabs raised in rice paddies, which solves the problem that existing crab-catching devices are time-consuming and labor-intensive when collecting the caught crabs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for catching crabs raised in rice paddies, comprising a cage body, a perforated bottom plate fixedly connected to the bottom of the cage body, inlet components installed on both sides of the cage body, support platforms fixedly connected to both sides of the top of the cage body, a top cover hinged to the top of the support platform, side plates fixedly connected to both sides of the two top covers, a perforated platform slidably connected inside the cage body, a pull rod fixedly connected to the middle of the perforated platform, a support rod provided between the perforated platform and the top cover, T-shaped guide rails fixedly connected to both sides of the top of the perforated platform, a movable plate slidably connected between the two T-shaped guide rails, a brush fixedly connected to the bottom of the movable plate, a buffer component installed inside the movable plate, a crab-pushing plate installed on the top of the buffer component, multiple drainage holes opened inside the crab-pushing plate, a two-way threaded rod threadedly connected to both sides of the two movable plates, gears fixedly connected to both ends of the two-way threaded rod, and drive components installed at the four corners of the cage body.

[0006] Preferably, the inlet assembly includes a collection port, which is fixedly connected to the outside of the cage body. A rotating shaft is rotatably connected inside the collection port. A movable sleeve is fixedly connected to the middle of the outer periphery of the rotating shaft. A hollow baffle is fixedly connected to the bottom of the movable sleeve. Torsion springs are sleeved on both sides of the outer periphery of the rotating shaft. A limit strip is fixedly connected to the bottom wall of the inner side of the collection port.

[0007] Preferably, one end of the torsion spring is fixedly connected to the inner wall of the collection port, and the other end of the torsion spring is fixedly connected to the outer side of the movable sleeve.

[0008] Preferably, crab outlets are provided on both sides between the two support platforms, the two adjacent side plates and the crab outlets are adapted to each other, and inclined plates are fixedly connected to the bottom of both sides between the two support platforms.

[0009] Preferably, one end of the support rod is hinged to the bottom of the top cover, and the other end of the support rod is hinged to the top of the hollow platform.

[0010] Preferably, the buffer assembly includes an adjusting plate and two limiting grooves. The adjusting plate is slidably connected inside the movable plate. Multiple springs are fixedly connected between the bottom of the adjusting plate and the inner bottom wall of the movable plate. The top of the adjusting plate is fixedly connected to the bottom of the crab pusher plate. Limiting blocks are fixedly connected to both sides of the adjusting plate. The limiting grooves are formed in the inner wall of the movable plate. The limiting blocks are slidably connected inside the limiting grooves. Multiple drainage holes are formed inside the adjusting plate.

[0011] Preferably, the drive assembly includes a fixed column, which is fixedly connected to the outside of the cage. The fixed column has a cavity inside, and a rack is fixedly connected to the inner wall of the cavity. The rack and the gear mesh with each other.

[0012] Preferably, both sides of the cavity are fixedly connected with barrier bars, and the outer periphery of the bidirectional threaded rod is disposed between two adjacent barrier bars.

[0013] Preferably, a handle is fixedly connected to the top of the pull rod, and a notch is provided in the middle between the two top covers.

[0014] Preferably, the outer side of the perforated baffle is slidably connected to the inside of the collection port, and the bottom side of the perforated baffle away from the cage body is fitted with the limiting strip.

[0015] Working Principle: The device is placed in a rice paddy. Its perforated design allows water to seep into the device, submerging the lower half and leaving the upper half above water. Crabs in the paddy are attracted by bait placed inside the device and enter through the inlet component, where they settle on the perforated platform. The inlet component prevents the crabs from leaving the device after entering. Once enough crabs have been caught, the user places a collection bag over the inclined plate. Pulling the lever upwards moves the perforated platform, causing the caught crabs to rise simultaneously. This upward movement of the platform pushes the support rod, opening the two top covers. The platform's movement also moves a movable plate upwards via a T-shaped guide rail. This movement, in turn, moves a bidirectional threaded rod upwards, causing gears at both ends of the rod to move upwards within the cavity of the fixed column. The gears and racks rotate as they move upwards, driving the bidirectional threaded rod. When the bidirectional threaded rod rotates, it causes the two movable plates on its outer periphery to move in opposite directions synchronously. This pushes the crabs caught on the perforated platform towards the side wall of the cage by the movable plates, adjusting plates, and crab-pushing plates. As the perforated platform is gradually lifted upwards, the support rod pushes the top cover upwards and unfolds, causing the side plates on both sides to detach from the crab exit opening, opening the exit opening. At the same time, the crabs on the perforated platform are also pushed closer to the exit opening by the movable plates, adjusting plates, and crab-pushing plates. As the perforated platform rises to the top of the cage, the buffer components on both sides and the crab-pushing plates push the crabs gathered on the perforated platform from the exit opening onto the inclined plate. Finally, the crabs slide down the inclined plate into the pocket, thus completing the crab collection. Furthermore, as the movable plates move, impurities on the perforated platform are cleaned by the brush and collected at the edge of the perforated platform. Users only need to clean the two edges of the perforated platform to quickly clean the impurities accumulated inside the device. Then, simply place the bait on the edge of the perforated platform and push the lever downwards to move the platform inwards. The platform, by pulling the support rod, causes the two top covers to flip downwards and close. During this downward flipping, the top covers will first contact the top of the crab-pushing plate. Because the crab-pushing plate is relatively high, it ensures the crabs are smoothly pushed and gathered, preventing them from entering the gap between the two movable plates. Therefore, when the top covers move down to close the top of the device, they will squeeze the crab-pushing plate and push it downwards, compressing the adjusting plate into the movable plate, thus lowering its height and allowing the top covers to close smoothly. After entering the cage, the crab-pushing plate will also be spring-loaded back to its original height, preventing crabs from jumping over and entering between the two movable plates. This makes it easier to pull the perforated platform back up, concentrating all the crabs collected inside the device on both sides of the platform, and finally pushing them out of the device through the crab exit.

[0016] This invention provides a device for catching crabs farmed in rice paddies. It has the following beneficial effects:

[0017] 1. This invention, through the cooperation of a pull rod, a T-shaped guide rail, a movable plate, an adjusting plate, a crab pushing plate, a drainage hole, a spring, a limiting groove, a limiting block, and a brush, enables the device to clean and collect impurities that enter the device. As the device is turned on to remove crabs, it can collect impurities from the paddy field that have entered the device, making it convenient for users to clean.

[0018] 2. This invention, through the cooperation of a support platform, top cover, hollow platform, support rod, bidirectional threaded rod, gear, fixed column, rack, hollow platform, T-shaped guide rail, movable plate, adjusting plate, and crab-pushing plate, enables the device to divide the crabs inside the device into two groups and gather them together when retrieving crabs. Simultaneously, as the device is opened, the crabs gathered on both sides are pushed out of the device and collected. This allows users to conveniently retrieve crabs without lifting or moving the crab trap, improving crab-catching efficiency. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a schematic diagram of the bidirectional threaded rod structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the support rod structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the internal structure of the cage of the present invention;

[0023] Figure 5 This is a schematic diagram of the collection port structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the hollow platform structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the internal structure of the fixed column of the present invention;

[0026] Figure 8 This is a cross-sectional view of the movable plate of the present invention.

[0027] The components are as follows: 1. Cage body; 2. Hollowed-out bottom plate; 3. Capture opening; 4. Rotating shaft; 5. Movable sleeve; 6. Hollowed-out baffle; 7. Torsion spring; 8. Limiting strip; 9. Support platform; 10. Top cover; 11. Side plate; 12. Hollowed-out platform; 13. Pull rod; 14. T-shaped guide rail; 15. Movable plate; 16. Adjusting plate; 17. Crab pushing plate; 18. Drain hole; 19. Spring; 20. Limiting groove; 21. Limiting block; 22. Brush; 23. Support rod; 24. Two-way threaded rod; 25. Gear; 26. Fixed column; 27. Cavity; 28. Rack; 29. ​​Barrier strip; 30. Inclined plate; 31. Handle; 32. Crab exit opening. Detailed Implementation

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example:

[0030] Please see the appendix Figure 1 - Appendix Figure 8 This invention provides a device for catching crabs raised in rice paddies, including a cage 1. Crabs attracted by bait placed inside the device are gathered inside the cage 1, preventing them from escaping back into the rice paddy. A perforated bottom plate 2 is fixedly connected to the bottom of the cage 1. The holes in the perforated bottom plate 2 allow water inside the device to be quickly drained back into the rice paddy when the device is lifted for transfer. Inlet components are installed on both sides of the cage 1, allowing crabs to enter the device from the rice paddy through the inlet components, while preventing them from returning to the rice paddy through the inlet components. Support platforms 9 are fixedly connected to both sides of the top of the cage 1. A top cover 10 is hinged to the top of the support platform 9. When both top covers 10 are closed, the top of the device is sealed, preventing crabs from climbing out of the device. Both top covers 10 are fixedly connected to side plates 11 on both sides. A hollow platform 12 is slidably connected inside the cage body 1. A pull rod 13 is fixedly connected to the middle of the hollow platform 12. The hollow platform 12 can be easily pulled upward or pushed downward by the pull rod 13, thereby pulling the crabs gathered on the hollow platform 12 out of the device and collecting the crabs.

[0031] A support rod 23 is provided between the perforated platform 12 and the top cover 10. As the pull rod 13 pulls the perforated platform 12 upwards or downwards, the two top covers 10 can be opened or closed by pushing or pulling the support rod 23, facilitating quick collection of crabs or placement of bait. T-shaped guide rails 14 are fixedly connected to both sides of the top of the perforated platform 12. A movable plate 15 is slidably connected between the two T-shaped guide rails 14. A brush 22 is fixedly connected to the bottom of the movable plate 15. The T-shaped guide rails 14 limit the movement of the movable plate 15, allowing it to slide on the perforated platform 12 while preventing it from detaching. As the movable plate 15 slides on the perforated platform 12, the brush 22 at its bottom contacts the top of the perforated platform 12, thus cleaning and collecting any accumulated impurities. The movable plate 15 is equipped with a buffer assembly, and a crab-pushing plate 17 is installed on top of the buffer assembly. The buffer assembly extends the height of the crab-pushing plate 17, ensuring that after the device is closed and placed in the paddy field, the water level in the paddy field will not overflow the crab-pushing plate 17. This ensures that the crabs inside the cage 1 are separated by the two crab-pushing plates 17 and the buffer assembly, facilitating subsequent retrieval and collection. Furthermore, the buffer assembly prevents the crab-pushing plate 17 from hitting the bottom of the top cover 10 due to excessive height when the top cover 10 is closed or opened, thus ensuring that the device can be opened or closed smoothly.

[0032] The crab-pushing plate 17 has multiple drainage holes 18 inside, which effectively reduce the resistance caused by the alignment of water inside the paddy field when the crab-pushing plate 17 moves. Both sides of the two movable plates 15 are threaded with bidirectional threaded rods 24, and gears 25 are fixedly connected to both ends of the bidirectional threaded rods 24. Drive components are installed at the four corners of the cage body 1. These drive components drive the gears 25 to rotate, which in turn drives the bidirectional threaded rods 24 to rotate, thereby controlling the movement of the two buffer components and the crab-pushing plate 17, allowing the two crab-pushing plates 17 to move synchronously in opposite directions.

[0033] The entrance component includes a trapping opening 3, which is fixedly connected to the outside of the cage body 1. A rotating shaft 4 is rotatably connected inside the trapping opening 3. A movable sleeve 5 is fixedly connected to the center of the outer circumference of the rotating shaft 4. A perforated baffle 6 is fixedly connected to the bottom of the movable sleeve 5. Torsion springs 7 are fitted on both sides of the outer circumference of the rotating shaft 4. A limiting strip 8 is fixedly connected to the inner bottom wall of the trapping opening 3. When crabs in the paddy field are attracted by the bait placed inside the device, they enter the trapping opening 3. Upon contact with the perforated baffle 6 inside the trapping opening 3, the crab pushes it up, causing the movable sleeve 5 to rotate the rotating shaft 4 and tighten the torsion springs 7. The crab then passes through the trapping opening 3 and enters the cage body 1. The tightened torsion spring 7 then resets, causing the movable sleeve 5 to flip downwards, thus closing the perforated baffle 6 inside the trapping opening 3 under the limiting strip 8. At this point, the crabs inside the cage body 1 cannot push the perforated baffle 6 to open it, thus preventing the crabs from escaping.

[0034] One end of the torsion spring 7 is fixedly connected to the inner wall of the trapping opening 3, and the other end of the torsion spring 7 is fixedly connected to the outside of the movable sleeve 5. This allows the perforated baffle 6 to flip over and tighten the torsion spring 7 when the crab enters the cage 1 through the entrance assembly. When the crab enters the cage 1, the perforated baffle 6 will immediately flip downward and stick to the side of the limiting strip 8 under the action of the torsion spring 7, ensuring that the crab cannot escape from the cage 1.

[0035] Both sides of the two support platforms 9 are provided with crab outlets 32. The two adjacent side plates 11 and the crab outlets 32 are adapted to each other. The crab outlets 32 on both sides allow the crabs collected inside the device to be discharged. At the same time, the cooperation between the side plates 11 and the crab outlets 32 ensures that when the device is closed, the crab outlets 32 are sealed by the side plates 11, preventing crabs from climbing out of the device through the crab outlets 32. The bottom of both sides of the two support platforms 9 are fixedly connected with inclined plates 30. The crabs discharged from the crab outlets 32 will fall directly onto the inclined plates 30, and then slide down the inclined plates 30 directly into the pocket below.

[0036] One end of the support rod 23 is hinged to the bottom of the top cover 10, and the other end is hinged to the top of the hollow platform 12. When the hollow platform 12 moves upward, it pushes the support rod 23 to lift the top cover 10 upward, thereby opening the device and facilitating the user to collect the crabs caught inside. When the hollow platform 12 moves downward, the support rod 23 pulls the two open top covers 10 downward to close, shutting down the device and preventing crabs from crawling out during subsequent crab-catching.

[0037] The buffer assembly includes an adjusting plate 16 and two limiting grooves 20. The adjusting plate 16 is slidably connected inside the movable plate 15. Multiple springs 19 are fixedly connected between the bottom of the adjusting plate 16 and the inner bottom wall of the movable plate 15. The top of the adjusting plate 16 is fixedly connected to the bottom of the crab pushing plate 17. Limiting blocks 21 are fixedly connected to both sides of the adjusting plate 16. The limiting grooves 20 are opened in the inner wall of the movable plate 15, and the limiting blocks 21 are slidably connected inside the limiting grooves 20. Multiple drainage holes 18 are opened inside the adjusting plate 16. The hollow platform 12 drives the two top covers 10 to flip downward and close by pulling the support rod 23. During the downward flipping and closing process of the top covers 10, the top covers 10 will contact the top of the crab pushing plate 17 first. Since the crab pushing plate 17 is relatively high, it ensures that the crabs can be smoothly pushed and gathered, preventing the crabs from entering the gap between the two movable plates 15. Therefore, when the top cover 10 moves down to close the top of the device, the top cover 10 will squeeze the crab pusher plate 17 and push it downwards, causing the crab pusher plate 17 to compress the adjusting plate 16 into the movable plate 15, thereby reducing the height of the crab pusher plate 17 and allowing the top cover 10 to close smoothly. At the same time, after the crab pusher plate 17 enters the cage 1, it will also be reset to its original height by the spring 19, preventing crabs from jumping over and entering between the two movable plates 15. This makes it convenient to concentrate all the crabs collected inside the device on both sides of the hollow platform 12 when the hollow platform 12 is pulled up. Furthermore, the cooperation of the limiting groove 20 and the limiting block 21 ensures that the adjusting plate 16 will not be ejected from the interior of the movable plate 15.

[0038] The drive assembly includes a fixed post 26, which is fixedly connected to the outside of the cage 1. A cavity 27 is formed inside the fixed post 26, and a rack 28 is fixedly connected to the inner wall of the cavity 27. The rack 28 meshes with a gear 25. As the perforated platform 12 moves upward, it pushes the movable plate 15 upward via the T-shaped guide rail 14. The upward movement of the movable plate 15 drives the bidirectional threaded rod 24 upward, causing the gears 25 at both ends of the bidirectional threaded rod 24 to move upward within the cavity 27 inside the fixed post 26. The engagement of the gears 25 and the rack 28 allows the gears 25 to rotate as they move upward, thus driving the bidirectional threaded rod 24 to rotate. When the bidirectional threaded rod 24 rotates, it causes the two movable plates 15 on its outer periphery to move synchronously in opposite directions. This pushes the crabs captured and resting on the perforated platform 12 towards the side wall of the cage 1 by the movable plates 15, the adjusting plate 16, and the crab-pushing plate 17. When the hollow platform 12 descends, the gear 25 and rack 28 work together to drive the bidirectional threaded rod 24 to rotate in the opposite direction. This causes the bidirectional threaded rod 24 to drive the two movable plates 15 to move synchronously in opposite directions, thereby preventing the movable plates 15 from blocking the interior of the two entrance components and making it easier for crabs to enter the cage 1.

[0039] Both sides of the cavity 27 are fixedly connected with barrier bars 29. The outer periphery of the bidirectional threaded rod 24 is set between two adjacent barrier bars 29. The barrier bars 29 can prevent the bidirectional threaded rod 24 from shaking when rotating, and at the same time can limit the gear 25 inside the cavity 27 to ensure that the gear 25 will not directly disengage from the rack 28.

[0040] A handle 31 is fixedly connected to the top of the pull rod 13. A notch is provided in the middle between the two top covers 10. The handle 31 allows the pull rod 13 to be easily pulled up or down. Furthermore, by painting the pull rod 13 with a bright color, the user can effectively locate the device in the rice paddy, preventing the tall rice stalks from obscuring the device's position. The two notches on the top covers 10 prevent interference between the top covers 10 and the pull rod 13, allowing the top covers 10 to close or open smoothly.

[0041] The outer side of the perforated baffle 6 is slidably connected to the inside of the trapping opening 3, and the bottom side of the perforated baffle 6 away from the cage body 1 is fitted with the limiting strip 8. Both sides of the perforated baffle 6 are attached to the inner wall of the trapping opening 3. Simultaneously, the holes in the perforated baffle 6 effectively reduce the water resistance to opening the perforated baffle 6 when crabs push it, allowing crabs to smoothly enter the device. Through the cooperation of the perforated baffle 6 and the limiting strip 8, it is ensured that when the perforated baffle 6 is closed, crabs inside the cage body 1 cannot push it open, preventing them from escaping the device.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for catching crabs raised in rice paddies, comprising a cage (1), characterized in that, The bottom of the cage (1) is fixedly connected to a perforated bottom plate (2). Inlet components are installed on both sides of the cage (1). Support platforms (9) are fixedly connected to both sides of the top of the cage (1). A top cover (10) is hinged to the top of the support platform (9). Side plates (11) are fixedly connected to both sides of the two top covers (10). A perforated platform (12) is slidably connected inside the cage (1). A pull rod (13) is fixedly connected to the middle of the perforated platform (12). A support rod (23) is provided between the perforated platform (12) and the top cover (10). The top two sides of the perforated platform (12) are... T-shaped guide rails (14) are fixedly connected to each side. A movable plate (15) is slidably connected between the two T-shaped guide rails (14). A brush (22) is fixedly connected to the bottom of the movable plate (15). A buffer assembly is installed inside the movable plate (15). A crab pusher plate (17) is installed on the top of the buffer assembly. Multiple drainage holes (18) are opened inside the crab pusher plate (17). A two-way threaded rod (24) is threadedly connected to both sides of the two movable plates (15). Gears (25) are fixedly connected to both ends of the two-way threaded rod (24). A drive assembly is installed at each of the four corners of the cage (1). The buffer assembly includes an adjusting plate (16) and two limiting grooves (20). The adjusting plate (16) is slidably connected inside the movable plate (15). Multiple springs (19) are fixedly connected between the bottom of the adjusting plate (16) and the inner bottom wall of the movable plate (15). The top of the adjusting plate (16) is fixedly connected to the bottom of the crab pusher plate (17). Limiting blocks (21) are fixedly connected to both sides of the adjusting plate (16). The limiting grooves (20) are opened on the inner wall of the movable plate (15). The limiting blocks (21) are slidably connected inside the limiting grooves (20). Multiple drainage holes (18) are opened inside the adjusting plate (16). The drive assembly includes a fixed column (26), which is fixedly connected to the outside of the cage (1). A cavity (27) is provided inside the fixed column (26), and a rack (28) is fixedly connected to the inner wall of the cavity (27). The rack (28) and the gear (25) mesh with each other. The cavity (27) has two sides of fixedly connected barrier bars (29), and the outer periphery of the bidirectional threaded rod (24) is arranged between two adjacent barrier bars (29).

2. The device for catching rice-farmed crabs according to claim 1, characterized in that, The inlet assembly includes a collection port (3), which is fixedly connected to the outside of the cage (1). A rotating shaft (4) is rotatably connected inside the collection port (3). A movable sleeve (5) is fixedly connected to the middle of the outer periphery of the rotating shaft (4). A hollow baffle (6) is fixedly connected to the bottom of the movable sleeve (5). Torsion springs (7) are sleeved on both sides of the outer periphery of the rotating shaft (4). A limit strip (8) is fixedly connected to the bottom wall of the collection port (3).

3. The device for catching rice-farmed crabs according to claim 2, characterized in that, One end of the torsion spring (7) is fixedly connected to the inner wall of the collection port (3), and the other end of the torsion spring (7) is fixedly connected to the outside of the movable sleeve (5).

4. The device for catching rice-farmed crabs according to claim 1, characterized in that, Crab outlets (32) are provided on both sides between the two support platforms (9), and the two adjacent side plates (11) and the crab outlets (32) are adapted to each other. Inclined plates (30) are fixedly connected to the bottom of both sides between the two support platforms (9).

5. The device for catching rice-farmed crabs according to claim 1, characterized in that, One end of the support rod (23) is hinged to the bottom of the top cover (10), and the other end of the support rod (23) is hinged to the top of the hollow platform (12).

6. The device for catching rice-farmed crabs according to claim 1, characterized in that, The top of the pull rod (13) is fixedly connected to a handle (31), and a notch is provided in the middle between the two top covers (10).

7. The device for catching rice-farmed crabs according to claim 2, characterized in that, The hollow baffle (6) is slidably connected to the inside of the collection port (3) on the outside, and the bottom of the hollow baffle (6) is attached to the side away from the cage (1) and the limiting strip (8).

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