A kind of Chinese soft-shelled turtle unpowered directional recapture device for rice and soft-shelled turtle co-cultivation field

Abstract

The application discloses a kind of Chinese soft-shelled turtles unpowered directional recapture device for rice and pig co-cultivation field, it is related to Chinese soft-shelled turtles recapture technical field, including the collection box being arranged in ring ditch area inside, the side of the collection box is fixedly connected with buffer box, the sidewall of the collection box and the buffer box is all provided with mesh plate that is convenient for water flow to flow, one end of the buffer box is fixedly connected with deflector, the sidewall of the buffer box near the deflector is opened with import that is convenient for Chinese soft-shelled turtles recapture to enter;The bottom of the deflector is provided with gravity transmission assembly for screening different weight Chinese soft-shelled turtles recapture.In the application, by setting gravity transmission assembly and lifting adjusting assembly, rely on Chinese soft-shelled turtles own weight as only power source, cooperate floating plate, spring, rack and pinion transmission mechanism and threaded lifting adjusting structure, the unpowered automatic grading screening of finished product turtle and young turtle is realized.

Description

Technical Field

[0001] This invention relates to the field of Chinese soft-shelled turtle recapture technology, and more specifically, to a non-powered directional recapture device for Chinese soft-shelled turtles used in rice-soft-shelled turtle co-cultivation fields. Background Technology

[0002] Rice-turtle co-cultivation is a typical model in China's integrated rice-fish farming system that boasts outstanding economic and ecological benefits. It leverages the shallow water environment and natural food resources of rice paddies to achieve a dual benefit of improved rice quality and ecological farming of Chinese soft-shelled turtles. In recent years, it has been widely promoted and applied in major rice-producing areas such as the middle and lower reaches of the Yangtze River. The recapture of adult Chinese soft-shelled turtles is the core process in rice-turtle co-cultivation, directly determining the farming output efficiency and the quality of the finished product.

[0003] Currently, in existing rice-turtle co-cultivation fields, traditional methods such as manual harvesting, pond drainage harvesting, and ordinary trap harvesting are mostly used. Manual harvesting is labor-intensive and inefficient; large-scale rice paddy operations require a large workforce, and trampling can easily damage the topsoil and rice roots. Pond drainage harvesting requires draining the surrounding ditches, which can cause strong stress reactions in Chinese soft-shelled turtles, affecting their survival and appearance, and disrupting the normal rice-fishing cycle. Ordinary trap harvesting is highly random, with a low recapture rate, and easily mixes in juvenile turtles, miscellaneous fish, and silt and weeds, resulting in a large workload for subsequent sorting. Furthermore, the netting and hard frame of the traps can easily scratch the turtles' skirts and carapaces, reducing the commercial value of the finished turtles. Most harvesting devices also lack size screening functions, making it impossible to automatically distinguish between finished and juvenile turtles, easily leading to the accidental capture of juvenile turtles and affecting the continued breeding of the farmed population. Therefore, there is an urgent need for a non-powered directional recapture device for Chinese soft-shelled turtles in rice-turtle co-cultivation fields to solve the above problems. Summary of the Invention

[0004] In response to the problems in related technologies, this invention proposes a non-powered directional capture device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] The technical solution of this invention is implemented as follows:

[0006] A non-powered directional trapping device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields includes a collection box set inside the ring ditch area, a buffer box fixedly connected to one side of the collection box, and mesh plates for facilitating water flow on the side walls of both the collection box and the buffer box. A guide plate is fixedly connected to one end of the buffer box, and an inlet is opened on the outer wall of the buffer box near the guide plate to facilitate the entry of Chinese soft-shelled turtles for trapping.

[0007] The bottom of the guide plate is equipped with a gravity transmission component for recapturing and screening Chinese soft-shelled turtles of different weights.

[0008] The inner walls of both sides of the collection box are fixedly connected with partitions, and anti-escape components are provided on one side of the partitions and on one side of the inner wall of the buffer box.

[0009] The buffer box is equipped with a locking component inside to limit the rotation of its internal anti-escape components;

[0010] Below the guide plate is a lifting component for adjusting the threshold of the gravity transmission component.

[0011] Preferably, the escape prevention component includes a fixed ear, a rotating roller is rotatably connected to one side of the outer wall of the fixed ear, a swing plate is fixedly connected to the circumferential outer wall of the rotating roller, and a counterweight is fixedly connected to the bottom outer wall of the swing plate.

[0012] Preferably, handles are fixedly connected to both outer walls of the collection box, a cover plate is inserted into the top outer wall of the collection box, a reinforcing rod is fixedly connected to the inside of the collection box, and a buoyancy plate for placing bait and facilitating ventilation of the Chinese soft-shelled turtle is fixedly connected to one outer wall of the reinforcing rod. The vertical height of the buoyancy plate is higher than the water level in the planting area, and the bottom of the buffer box is inclined to facilitate the Chinese soft-shelled turtle to quickly enter the interior of the collection box from the buffer box.

[0013] Preferably, the cross-section of the guide plate is arc-shaped, the distance between the inner walls on both sides of the guide plate gradually decreases along the direction close to the buffer box, and the bottom outer wall of the guide plate is provided with a plurality of protrusions, the cross-section of the protrusions being semi-circular.

[0014] Preferably, the gravity transmission assembly includes a through groove formed on the inner wall of the bottom of the guide plate, a housing fixedly connected to the outer wall of the bottom of the guide plate, and first sliding grooves evenly distributed on both inner walls of the housing. A slider is slidably connected inside the first sliding groove, and a floating plate is fixedly connected to one outer wall of the slider. The floating plate is adapted to the through groove, and the cross-section of the floating plate is a right trapezoid. A sliding plate is provided inside the buffer box, and vertical columns evenly distributed are fixedly connected to the outer wall of the bottom of the floating plate. A spring is fixedly connected to the outer wall of the top of the sliding plate, and the other end of the spring is fixedly connected to the outer wall of the bottom of the floating plate. The vertical column passes through the center of the spring.

[0015] Preferably, a rack is fixedly connected to the bottom outer wall of the floating plate, a second gear disk meshes with one side outer wall of the rack, a third gear disk meshes with the circumferential outer wall of the second gear disk, the second gear disk is rotatably connected to the two inner walls of the housing through a second rotating column, and a third rotating column is fixedly connected to the circumferential inner wall of the third gear disk.

[0016] Preferably, a driving wheel is fixedly connected to the outer circumference of the third rotating column, a transmission belt is driven to the outer circumference of the driving wheel, a driven wheel is driven to the driving wheel via the transmission belt, a first rotating column is fixedly connected to the inner circumference of the driven wheel, a first gear disk is fixedly connected to one end of the first rotating column located inside the buffer box, a toothed plate meshes with the outer circumference of the first gear disk, a limit post is fixedly connected to the bottom outer wall of the toothed plate, an extension column is fixedly connected to the outer wall of one end of the rotating roller located on one side of the buffer box, a fixing block is fixedly connected to one end of the extension column, a through-hole is opened on the outer circumference of the fixing block, and one end of the limit post is inserted into the inside of the through-hole.

[0017] Preferably, a telescopic rod is fixedly connected to the top outer wall of the toothed plate, and the top end of the telescopic rod is fixedly connected to the top inner wall of the buffer box.

[0018] Preferably, the lifting assembly includes a horizontal plate fixedly connected to the inner wall of one side of the housing, a threaded screw rotatably connected to the top of the horizontal plate, a threaded sleeve threadedly connected to the outer circumference of the threaded screw, the threaded sleeve being fixedly connected to the top outer wall of the sliding plate, and a rotating block being fixedly connected to one end of the threaded screw extending to the outside of the buffer box.

[0019] Preferably, an indicator plate is fixedly connected to one outer wall of the housing, a pendulum needle is fixedly connected to the outer circumference of the rotating block, and a stop bar for limiting and blocking the rotation of the pendulum needle is fixedly connected to both ends of the indicator plate, and a marking line is provided on the inner circumference of the indicator plate.

[0020] The beneficial effects of this invention are:

[0021] This invention provides a non-powered directional trapping device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields. Through a gravity transmission component and a lifting adjustment component, relying solely on the weight of the soft-shelled turtles as the power source, and in conjunction with a floating plate, spring, gear and rack transmission mechanism, and threaded lifting adjustment structure, it achieves automatic non-powered grading and screening of adult and juvenile turtles. Specifically, before operation, rotating an external rotating block drives a threaded screw to raise and lower a sliding plate, precisely adjusting the initial pre-compression of the spring to set the critical weight threshold for the floating plate to be pressed down and unlocked. Visual and precise calibration is achieved through the scale of an indicator plate and a pendulum needle. Only adult soft-shelled turtles meeting the target specifications are allowed to be captured. By using its own weight to press down the floating plate and trigger the unlocking mechanism to enter the collection box, juvenile turtles that do not meet the weight requirements cannot trigger the unlocking action and are automatically blocked outside the device, effectively avoiding the problem of accidental capture of juvenile turtles and ensuring the continuous breeding of the aquaculture population. At the same time, it eliminates the need for subsequent manual sorting, significantly reducing the labor costs of the harvesting operation. Moreover, the entire transmission mechanism is a purely mechanical underwater structure, requiring no external power source such as electricity or air supply, eliminating the risk of electrical components short-circuiting due to moisture, ensuring stable and reliable operation, long service life, and complete suitability for the high-humidity and muddy farming environment of paddy fields. The screening threshold can be flexibly adjusted according to different breeding cycles and different market sizes, making it highly versatile and adaptable.

[0022] This invention provides a non-powered directional trapping device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields. Through a two-stage escape prevention system and a gravity-linked locking system, combined with the inclined bottom of the buffer box and the floating plate structure inside the collection box, it achieves a complete escape prevention process: automatic unlocking for passage, automatic locking after passage, and a two-stage escape prevention system. Specifically, when the Chinese soft-shelled turtle triggers the gravity transmission mechanism, the limiting post automatically moves upward to release the lock on the swing plate at the entrance, allowing the turtle to push open the swing plate and enter the buffer box. After the turtle has completely passed through and left the floating plate, the spring rebounds, causing the transmission mechanism to reset, and the limiting post automatically falls back into the insertion hole to relock the swing plate shaft. Combined with the weight of the counterweight at the bottom of the swing plate, the passage is immediately closed. The automatic sealing mechanism effectively prevents the Chinese soft-shelled turtles from climbing out of the box and escaping. A second set of escape-prevention components inside the box forms a secondary barrier, further enhancing its reliability. The sloping bottom of the box guides the turtles to slide quickly into the collection area, minimizing their time in the narrow passage and preventing damage to their skirts and bodies from collisions and compression. The raised platform inside the box, above the water level, serves to place bait to enhance the attraction effect and provides a platform for the turtles to breathe and rest, preventing oxygen deprivation and stress in the enclosed environment. This significantly improves the survival rate and body integrity of the harvested turtles, ensuring their quality and economic value at market.

[0023] This invention provides a non-powered directional trapping device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields. Through its arc-shaped tapering guide plate, sidewall mesh plate, and modular box structure, it is perfectly adapted to the layout characteristics of the rice-soft-shelled turtle co-cultivation field's ring ditch and planting area. The flared guide plate, wider at the outside and narrower at the inside, can gather a large area of ​​active Chinese soft-shelled turtles along the ditch, guiding them directionally towards the inlet, effectively improving trapping efficiency and box entry rate. Simultaneously, the mesh plates covering the sidewalls of the collection box and buffer box allow for free water flow. Utilizing the natural water level difference between the rice paddy ring ditch and the planting area, a continuous, gentle flow is formed inside the device. This ensures that the dissolved oxygen and water temperature in the box remain consistent with the original field environment, preventing stress to the turtles due to sudden environmental changes. Furthermore, the biological habit of Chinese soft-shelled turtles crawling against the gentle current enhances the directional trapping effect. No additional power is required to generate flow throughout the entire process. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall front structure of the present invention.

[0026] Figure 2 This is a schematic diagram of the overall bottom structure of the present invention.

[0027] Figure 3 For the present invention Figure 2 A magnified structural diagram of point A in the middle.

[0028] Figure 4 This is a schematic diagram of the overall top structure of the present invention after the top is cut open.

[0029] Figure 5 For the present invention Figure 4 A magnified structural diagram at point B in the middle.

[0030] Figure 6 This is a schematic diagram of the overall half-sectional structure of the present invention.

[0031] Figure 7 For the present invention Figure 6 A magnified structural diagram at point C.

[0032] Figure 8 This is a schematic diagram of the front half-section structure of the present invention.

[0033] Figure 9 For the present invention Figure 8 A magnified structural diagram at point D.

[0034] Figure 10 This is a cross-sectional view of the internal structure of the shell in this invention.

[0035] Figure 11 For the present invention Figure 10 A magnified structural diagram at point E in the middle.

[0036] Figure 12 This is a schematic diagram showing the overall placement of the invention within a shared-crop field.

[0037] In the picture:

[0038] 1. Collection box; 2. Cover plate; 3. Mesh plate; 4. Handle; 5. Buffer box; 6. Shell; 7. Guide plate; 8. Inlet; 9. Protrusion; 10. Baffle; 11. Rotating block; 12. Indicator plate; 13. Swing pin; 14. Partition plate; 15. Anti-escape component; 1501. Rotating roller; 1502. Swing plate; 1503. Counterweight bar; 1504. Fixing lug; 16. Extension column; 17. Fixing block; 18. Insertion hole; 19. Limiting column; 20. Toothed plate; 21. Telescopic rod; 22. First tooth 23. Wheel; 24. First rotating column; 25. Drive belt; 26. Driven wheel; 27. Resting plate; 28. Reinforcing rod; 29. ​​Through groove; 30. Floating plate; 31. First sliding groove; 32. Sliding block; 33. Sliding plate; 34. Vertical column; 35. Spring; 36. Driving wheel; 37. Second gear disc; 38. Second rotating column; 39. Threaded screw; 40. Threaded sleeve; 41. Horizontal plate; 43. Third gear disc; 45. Third rotating column; 46. Rack; 47. Ring ditch area; 48. Planting area. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0040] Please see Figures 1-12 A non-powered directional trapping device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields includes a collection box 1 set inside the ring ditch area 47, a buffer box 5 fixedly connected to one side of the collection box 1, and mesh plates 3 for facilitating water flow on the side walls of both the collection box 1 and the buffer box 5. A guide plate 7 is fixedly connected to one end of the buffer box 5, and an inlet 8 is opened on the outer wall of the side of the buffer box 5 near the guide plate 7 to facilitate the entry of Chinese soft-shelled turtles for trapping.

[0041] The bottom of the guide plate 7 is equipped with a gravity transmission component for recapturing and screening Chinese soft-shelled turtles of different weights.

[0042] Both sides of the inner wall of the collection box 1 are fixedly connected with partitions 14, and both sides of the inner wall of the partition 14 and the buffer box 5 are provided with anti-escape components 15.

[0043] The buffer box 5 is equipped with a locking component to limit the rotation of its internal anti-escape component 15;

[0044] Below the deflector plate 7 is a lifting component for adjusting the threshold of the gravity transmission component.

[0045] Furthermore, the escape prevention component 15 includes a fixed ear 1504. A rotating roller 1501 is rotatably connected to one side of the outer wall of the fixed ear 1504. A swing plate 1502 is fixedly connected to the outer circumference of the rotating roller 1501. A counterweight 1503 is fixedly connected to the bottom outer wall of the swing plate 1502. The escape prevention component 15 uses the fixed ear 1504 as the mounting support base, and the rotating roller 1501 is rotatably mounted on the fixed ear 1504. The swing plate 1502 rotates synchronously with the rotating roller 1501 and the counterweight 1503 is fixed at the bottom. Relying on the gravity of the counterweight 1503, the swing plate 1502 maintains a natural hanging state under normal conditions without external force, automatically blocking the passage. When the Chinese soft-shelled turtle crawls from the outside to the inside of the enclosure, it can easily crawl inward by its own forward thrust. The swing plate 1502 is opened, causing it to rotate synchronously around the rotating roller 1501 to open the passageway, ensuring the turtles can enter smoothly. After the Chinese soft-shelled turtles have completely passed through the swing plate 1502, the counterweight 1503 drives the rotating roller 1501 and the swing plate 1502 to automatically rotate in the opposite direction and reset, quickly restoring the closed state of the passage. This physically blocks the Chinese soft-shelled turtles that have entered the box from climbing out and escaping, achieving a one-way passage and automatic closure to prevent escape. At the same time, the opening and closing process of the swing plate 1502 is smooth and without rigid impact, so it will not scratch the skirt and carapace of the Chinese soft-shelled turtles. While ensuring the escape prevention effect, it also takes into account the requirement of low-damage harvesting. When it is placed at the inlet 8 of the buffer box 5 and the partition 14 of the collection box 1, it can form a two-level escape prevention barrier, further improving the overall escape prevention reliability of the device.

[0046] Furthermore, handles 4 are fixedly connected to both outer walls of the collection box 1, and a cover plate 2 is inserted into the top outer wall of the collection box 1. A reinforcing rod 27 is fixedly connected inside the collection box 1, and a buoyancy plate 26 for placing bait and facilitating ventilation for the Chinese soft-shelled turtles is fixedly connected to one outer wall of the reinforcing rod 27. The vertical height of the buoyancy plate 26 is higher than the water level at 48 in the planting area. The vertical height of the buoyancy plate 26, fixed by the reinforcing rod 27 inside the collection box 1, is higher than the conventional water level at 48 in the rice paddy planting area. Fish bait can be placed on the buoyancy plate 26, which can both... The device attracts surrounding Chinese soft-shelled turtles to continuously gather, and also provides a ventilation platform for the turtles entering the collection box 1. This effectively solves the problems of oxygen deficiency, stress, and skirt damage in turtles in the closed water of traditional traps. The bottom of the buffer box 5 is set at an incline to facilitate the rapid entry of Chinese soft-shelled turtles from the buffer box 5 into the collection box 1. The overall downward slope structure of the bottom of the buffer box 5 reduces the frictional resistance of the turtles sliding, allowing them to quickly slide into the rear collection box 1, reducing the risk of the turtles staying, squeezing, biting each other, and causing damage to their body surface.

[0047] Furthermore, the cross-section of the guide plate 7 is arc-shaped, and the distance between the inner walls on both sides of the guide plate 7 gradually decreases along the direction close to the buffer box 5. Multiple protrusions 9 are provided on the bottom outer wall of the guide plate 7, and the cross-section of the protrusions 9 is semi-circular. Because the cross-section of the guide plate 7 is arc-shaped, it enables the Chinese soft-shelled turtle to move against the slow current after entering the guide plate 7, which satisfies the biological habits of the Chinese soft-shelled turtle to move against the slow current, crawl along the ditch, and prefer narrow, light-proof channels. At the same time, the trumpet-shaped tapering guide plate 7 forms a directional gathering of the Chinese soft-shelled turtles moving around, effectively improving the passage efficiency of the finished turtles moving towards the device entrance.

[0048] Furthermore, the gravity transmission assembly includes a through groove 28 formed on the inner wall of the bottom of the guide plate 7. A housing 6 is fixedly connected to the outer wall of the bottom of the guide plate 7. The inner walls of both sides of the housing 6 are provided with equally spaced first sliding grooves 31. A slider 32 is slidably connected inside the first sliding groove 31. A floating plate 29 is fixedly connected to one outer wall of the slider 32. The floating plate 29 is adapted to the through groove 28. The cross-section of the floating plate 29 is a right-angled trapezoid. A sliding plate 33 is provided inside the buffer box 5. Equally spaced vertical columns 34 are fixedly connected to the bottom outer wall of the floating plate 29. A spring 35 is fixedly connected to the top outer wall of the sliding plate 33. The other end of 35 is fixedly connected to the bottom outer wall of the floating plate 29. The vertical column 34 passes through the center of the spring 35. When the finished Chinese soft-shelled turtle to be caught crawls along the guide plate 7 to the area of ​​the floating plate 29 above the bottom groove 28 of the guide plate 7, the Chinese soft-shelled turtle that meets the weight requirements will press down on the floating plate 29 with its own weight. The floating plate 29 slides smoothly down along the first groove 31 on the inner wall of the shell 6 by the sliders 32 on both sides, and simultaneously compresses the spring 35 sleeved on the outside of the vertical column 34 below the floating plate 29. The vertical column 34 passes through the center of the spring 35 to prevent the spring 35 from shifting and getting stuck under pressure, ensuring that the gravity transmission structure operates stably without jamming.

[0049] Furthermore, a rack 46 is fixedly connected to the bottom outer wall of the floating plate 29. A second gear disk 37 meshes with one side outer wall of the rack 46. A third gear disk 43 meshes with the circumferential outer wall of the second gear disk 37. The second gear disk 37 is rotatably connected to the inner walls of both sides of the housing 6 via a second rotating column 38. A third rotating column 45 is fixedly connected to the circumferential inner wall of the third gear disk 43. A driving wheel 36 is fixedly connected to the circumferential outer wall of the third rotating column 45. A transmission belt 24 is driven to the circumferential outer wall of the driving wheel 36. A driven wheel 25 is driven to the driving wheel 36 via the transmission belt 24. A first rotating column 23 is fixedly connected to the circumferential inner wall of the driven wheel 25. A first gear disk 22 is fixedly connected to one end of the first rotating column 23 located inside the buffer box 5. A toothed plate 20 meshes with the circumferential outer wall of the first gear disk 22. A limit post 19 is fixedly connected to the bottom outer wall of the toothed plate 20. An extension post is fixedly connected to one end of the outer wall of the rotating roller 1501 located on one side of the buffer box 5. 16. One end of the extension column 16 is fixedly connected to a fixing block 17. The outer circumferential wall of the fixing block 17 has a through-hole 18. One end of the limiting column 19 is inserted into the inside of the through-hole 18. During the downward movement of the floating plate 29, the rack 46 fixed at the bottom moves down synchronously, and sequentially meshes with the second gear disk 37 and the third gear disk 43 to complete the power reversal transmission. The third gear disk 43 rotates synchronously with the third rotating column 45, driving the coaxially fixed driving wheel 36 to rotate. The driving wheel 36 passes through... The power is transmitted over a long distance by the transmission belt 24 to the driven wheel 25 inside the buffer box 5. The driven wheel 25 drives the first rotating column 23 to rotate synchronously with the first gear disk 22 at the end. The first gear disk 22 meshes with the tooth plate 20 and rises upward. The limiting post 19 at the bottom of the tooth plate 20 moves upward with the tooth plate 20 and is completely pulled out from the insertion hole 18 of the fixing block 17 at the end of the extension column 16 of the anti-escape component 15 at the inlet 8 of the buffer box 5, releasing the locking constraint on the rotating roller 1501 and the swing plate 1502.

[0050] Furthermore, a telescopic rod 21 is fixedly connected to the top outer wall of the toothed plate 20. The top end of the telescopic rod 21 is fixedly connected to the top inner wall of the buffer box 5. The telescopic rod 21 connected to the top of the toothed plate 20 extends and retracts synchronously to play a vertical guiding and limiting role, preventing the toothed plate 20 from deviating and getting stuck, and ensuring the stability of the toothed plate 20 during the lifting process.

[0051] Furthermore, the lifting assembly includes a horizontal plate 41 fixedly connected to the inner wall of one side of the housing 6. A threaded screw 39 is rotatably connected to the top of the horizontal plate 41. A threaded sleeve 40 is threadedly connected to the outer circumference of the threaded screw 39. The threaded sleeve 40 is fixedly connected to the top outer wall of the sliding plate 33. A rotating block 11 is fixedly connected to one end of the threaded screw 39 extending to the outside of the buffer box 5. Before the fishing operation, the operator can adjust the screening threshold according to the target finished turtle size. The rotating block 11 on the outside of the rotating device drives the threaded screw 39 to rotate. The threaded screw 39 and the threaded sleeve 40 are threadedly engaged to drive the sliding plate 33 to rise and fall as a whole. The change in the height of the sliding plate 33 can adjust the initial pre-compression of the spring 35, thereby controlling the critical weight required for the floating plate 29 to be pressed down and unlocked.

[0052] Furthermore, an indicator plate 12 is fixedly connected to one side of the outer wall of the shell 6, and a pendulum needle 13 is fixedly connected to the outer circumference of the rotating block 11. Both ends of the indicator plate 12 are fixedly connected to a stop bar 10 for limiting and blocking the rotation of the pendulum needle 13. The inner circumference of the indicator plate 12 is provided with a marking line. The outer side of the shell 6 is equipped with the indicator plate 12, the pendulum needle 13 and the scale marking line. The rotating block 11 drives the pendulum needle 13 to synchronously indicate the corresponding weight range. The stop bars 10 at both ends limit the overtravel rotation of the pendulum needle 13, which can intuitively and accurately complete the specification screening. Young turtles with a weight below the threshold cannot press down the floating plate 29 to unlock the pendulum plate 1502 and will be automatically blocked outside the guide plate 7, realizing the automatic grading and separation of finished turtles and young turtles without the need for subsequent manual sorting.

[0053] In summary, with the help of the above-mentioned technical solution of the present invention, when in use, the operator places the entire device at the junction of the rice-turtle co-cultivation field ring ditch area 47 and the rice planting area 48. The collection box 1 is completely submerged in the water of the ring ditch. The arc-shaped, wide-on-outer-narrow-on-inner guide plate 7 extends outward and is set up along the edge of the shallow water planting area 48 of the rice field. The side walls of the collection box 1 and the buffer box 5 are fully covered with the mesh plate 3. The mesh plate 3 can realize the free flow of water. Relying on the water level difference naturally formed between the rice planting area 48 and the ring ditch area 47, a continuous and gentle flow is formed inside the device. On the one hand, it keeps the water environment inside the box in the same as the original water body in the field, avoiding the stress death of Chinese soft-shelled turtles caused by oxygen deficiency in the closed water. On the other hand, taking advantage of the biological habits of Chinese soft-shelled turtles, such as going against the slow flow, crawling along the ditch, and preferring narrow light-proof channels, the trumpet-shaped tapering guide plate 7 forms a directional gathering of Chinese soft-shelled turtles moving around, effectively improving the passage efficiency of the finished turtles moving towards the device entrance.

[0054] When the finished Chinese soft-shelled turtles to be caught crawl along the guide plate 7 to the floating plate 29 area above the bottom groove 28 of the guide plate 7, the turtles that meet the weight requirements will press down on the floating plate 29 with their own weight. The floating plate 29 slides smoothly downward along the first sliding groove 31 on the inner wall of the shell 6 by the sliders 32 on both sides, simultaneously compressing the spring 35 sleeved on the outside of the vertical column 34 below the floating plate 29. The vertical column 34 passes through the center of the spring 35 to prevent the spring 35 from shifting laterally under pressure and getting stuck, ensuring the stable operation of the gravity transmission structure without jamming. During the downward movement of the floating plate 29, the rack 46 fixed at the bottom moves down synchronously, engaging the second gear disk 37 and the third gear disk 43 in sequence to complete the power reversal transmission. The third gear disk 43 follows the first gear disk 37. The three rotating columns 45 rotate synchronously, driving the coaxially fixed driving wheel 36 to rotate. The driving wheel 36 transmits power over a long distance to the driven wheel 25 inside the buffer box 5 through the transmission belt 24. The driven wheel 25 drives the first rotating column 23 and the end first gear disk 22 to rotate synchronously. The first gear disk 22 meshes with the tooth plate 20 and lifts it upward. The telescopic rod 21 connected to the top of the tooth plate 20 extends and retracts synchronously to play a vertical guiding and limiting role, preventing the tooth plate 20 from deviating and getting stuck. The limiting column 19 at the bottom of the tooth plate 20 moves upward with the tooth plate 20 and is completely pulled out from the insertion hole 18 of the fixing block 17 at the end of the extension column 16 of the anti-escape component 15 at the inlet 8 of the buffer box 5, releasing the locking constraint on the rotating roller 1501 and the swing plate 1502.

[0055] At this point, the Chinese softshell turtle can easily push open the swing plate 1502 using its own forward crawling force, and slide into the buffer box 5 through the inlet 8. The downward sloping structure of the bottom of the buffer box 5 reduces the frictional resistance of the turtle's sliding, allowing the Chinese softshell turtle to quickly slide into the rear collection box 1. This reduces the turtle's body surface damage caused by staying, squeezing, and biting each other in the buffer box 5. At the same time, the vertical height of the saddle plate 26, which is fixed by the reinforcing rod 27 inside the collection box 1, is higher than the normal water level of the rice planting area 48. Turtle bait can be placed on the saddle plate 26, which can not only attract the surrounding Chinese softshell turtles to continuously gather in the device, but also provide a breathing platform for the Chinese softshell turtles that have entered the collection box 1, effectively solving the problem of the tightness of traditional ground cages. To address the issues of oxygen deficiency, stress, and skirt damage in turtles in closed water, once the Chinese soft-shelled turtle has completely passed through the swing plate 1502 and left above the floating plate 29, the spring 35's own rebound force pushes the floating plate 29 to reset upwards along the slide groove. Simultaneously, the rack 46 moves upwards in the opposite direction, driving the entire gear set to rotate, causing the rack 20 to fall downwards. The limiting post 19 re-inserts into the insertion hole 18 of the fixing block 17, locking the rotating roller 1501 of the anti-escape component 15 again. The counterweight bar 1503 at the bottom of the swing plate 1502 automatically falls vertically by its own weight, completely blocking the inlet 8 channel of the buffer box 5. This effectively prevents the captured Chinese soft-shelled turtles from climbing out in the opposite direction and escaping, achieving one-way passage and automatic locking.

[0056] Simultaneously, before the harvesting operation, the operator can adjust the screening threshold according to the target finished turtle size. The rotating block 11 on the outside of the rotating device drives the threaded screw 39 to rotate. The threaded screw 39 and the threaded sleeve 40 engage to drive the sliding plate 33 to rise and fall as a whole. The change in the height of the sliding plate 33 can adjust the initial pre-compression of the spring 35, thereby controlling the critical weight required for the floating plate 29 to be pressed down and unlocked. The outer side of the shell 6 is equipped with an indicator plate 12, a pendulum needle 13 and scale markings. The rotating block 11 drives the pendulum needle 13 to synchronously indicate the corresponding weight range at both ends. The baffle 10 restricts the overtravel rotation of the pendulum 13, enabling intuitive and precise size screening. Juvenile turtles weighing less than the threshold cannot press down the floating plate 29 to unlock the pendulum 1502 and will be automatically blocked outside the guide plate 7, achieving automatic grading and separation of finished and juvenile turtles without the need for subsequent manual sorting. After the batch recapture is completed, the operator can hold the handles 4 on both sides of the collection box 1 to lift the entire device off the water surface, pull out the plug-in cover 2 on the top of the collection box 1, and then smoothly take out the intact and undamaged finished Chinese soft-shelled turtles inside, completing the recapture of the Chinese soft-shelled turtles.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A non-powered directional trapping device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields, comprising a collection box (1) disposed inside a ring ditch area (47), characterized in that, A buffer box (5) is fixedly connected to one side of the collection box (1). Both the collection box (1) and the buffer box (5) are provided with mesh plates (3) to facilitate water flow. A guide plate (7) is fixedly connected to one end of the buffer box (5). An inlet (8) is opened on the outer wall of the buffer box (5) near the guide plate (7) to facilitate the entry of Chinese soft-shelled turtles for recapture. The bottom of the guide plate (7) is provided with a gravity transmission component for recapturing and screening Chinese soft-shelled turtles of different weights. The inner walls of both sides of the collection box (1) are fixedly connected with partitions (14), and anti-escape components (15) are provided on one side of the partition (14) and one side of the inner wall of the buffer box (5). The buffer box (5) is equipped with a locking component inside to limit the rotation of the internal anti-escape component (15); Below the guide plate (7) is a lifting component for adjusting the threshold of the gravity transmission component.

2. The non-powered directional trapping device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields according to claim 1, characterized in that, The escape prevention component (15) includes a fixed ear (1504), a rotating roller (1501) is rotatably connected to one side of the outer wall of the fixed ear (1504), a swing plate (1502) is fixedly connected to the outer circumference of the rotating roller (1501), and a counterweight bar (1503) is fixedly connected to the bottom outer wall of the swing plate (1502).

3. The non-powered directional trapping device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields according to claim 2, characterized in that, Handles (4) are fixedly connected to both outer walls of the collection box (1). A cover plate (2) is inserted into the top outer wall of the collection box (1). A reinforcing rod (27) is fixedly connected inside the collection box (1). A saddle plate (26) for placing bait and facilitating ventilation of the Chinese soft-shelled turtle is fixedly connected to one outer wall of the reinforcing rod (27). The vertical height of the saddle plate (26) is higher than the water level at the planting area (48). The bottom of the buffer box (5) is inclined to facilitate the Chinese soft-shelled turtle to quickly enter the interior of the collection box (1) from the buffer box (5).

4. The non-powered directional trapping device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields according to claim 3, characterized in that, The cross-section of the guide plate (7) is arc-shaped. The distance between the inner walls on both sides of the guide plate (7) gradually decreases along the direction close to the buffer box (5). The bottom outer wall of the guide plate (7) is provided with a plurality of protrusions (9), and the cross-section of the protrusions (9) is semi-circular.

5. The non-powered directional trapping device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields according to claim 4, characterized in that, The gravity transmission assembly includes a through groove (28) formed on the inner wall of the bottom of the guide plate (7). A housing (6) is fixedly connected to the outer wall of the bottom of the guide plate (7). The inner walls of both sides of the housing (6) are provided with first sliding grooves (31) distributed at equal intervals. A slider (32) is slidably connected inside the first sliding groove (31). A floating plate (29) is fixedly connected to the outer wall of one side of the slider (32). The floating plate (29) is adapted to the through groove (28). The cross-section of the floating plate (29) is a right trapezoid. A sliding plate (33) is provided inside the buffer box (5). Vertical columns (34) are fixedly connected to the outer wall of the bottom of the floating plate (29) at equal intervals. A spring (35) is fixedly connected to the outer wall of the top of the sliding plate (33). The other end of the spring (35) is fixedly connected to the outer wall of the bottom of the floating plate (29). The vertical column (34) passes through the center of the spring (35).

6. The non-powered directional trapping device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields according to claim 5, characterized in that, A rack (46) is fixedly connected to the bottom outer wall of the floating plate (29). A second gear disk (37) is meshed on one side outer wall of the rack (46). A third gear disk (43) is meshed on the circumferential outer wall of the second gear disk (37). The second gear disk (37) is rotatably connected to the inner walls of both sides of the housing (6) through a second rotating column (38). A third rotating column (45) is fixedly connected to the circumferential inner wall of the third gear disk (43).

7. A non-powered directional trapping device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields according to claim 6, characterized in that, A drive wheel (36) is fixedly connected to the outer circumference of the third rotating column (45). A transmission belt (24) is driven to the outer circumference of the drive wheel (36). A driven wheel (25) is driven to the drive wheel (36) via the transmission belt (24). A first rotating column (23) is fixedly connected to the inner circumference of the driven wheel (25). A first gear disk (22) is fixedly connected to one end of the first rotating column (23) located inside the buffer box (5). The outer circumferential wall of the disc (22) is engaged with a toothed plate (20). The bottom outer wall of the toothed plate (20) is fixedly connected with a limiting post (19). The outer wall of one end of the rotating roller (1501) located on one side of the buffer box (5) is fixedly connected with an extension post (16). One end of the extension post (16) is fixedly connected with a fixing block (17). The outer circumferential wall of the fixing block (17) is provided with a through-hole (18). One end of the limiting post (19) is inserted into the inside of the hole (18).

8. A non-powered directional trapping device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields according to claim 7, characterized in that, A telescopic rod (21) is fixedly connected to the top outer wall of the toothed plate (20), and the top end of the telescopic rod (21) is fixedly connected to the top inner wall of the buffer box (5).

9. A non-powered directional trapping device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields according to claim 8, characterized in that, The lifting assembly includes a horizontal plate (41) fixedly connected to the inner wall of one side of the housing (6). A threaded screw (39) is rotatably connected to the top of the horizontal plate (41). A threaded sleeve (40) is threadedly connected to the outer circumference of the threaded screw (39). The threaded sleeve (40) is fixedly connected to the top outer wall of the sliding plate (33). A rotating block (11) is fixedly connected to one end of the threaded screw (39) extending to the outside of the buffer box (5).

10. A non-powered directional trapping device for Chinese soft-shelled turtles in rice-soft-shelled turtle co-cultivation fields according to claim 9, characterized in that, An indicator plate (12) is fixedly connected to one side of the outer wall of the housing (6), a pendulum needle (13) is fixedly connected to the outer circumference of the rotating block (11), and a stop bar (10) for limiting and blocking the rotation of the pendulum needle (13) is fixedly connected to both ends of the indicator plate (12), and a marking line is provided on the inner circumference of the indicator plate (12).

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