A kind of fermented micro-particle feed feeding device for red claw prawn breeding

Abstract

The application discloses a fermented micro-particle feed feeding device for red claw prawn breeding, which is characterized by the following technical scheme: a ring-shaped air bag is arranged on the outer side of a floating plate to cooperate with a traction frame to float; a dry keeping mechanism is arranged on the outer side of a taper surface guide cylinder at the lower end of a storage cylinder; water vapor is condensed and led out according to the phase-change heat pipe principle through a filter screen cylinder, a heat pipe, a phase-change cylindrical cold end, a condensing protrusion, a phase-change disc-shaped hot end, a hot end radiator cooperating with a liquid collecting cylinder and a liquid discharge pipe to prevent feed from being damp and caked; a cluster separating pump mechanism is arranged between the floating plate and an adjusting mounting plate; after feed is mixed with pond water, the feed is evenly transported by a spiral pump feeding pipe through a conveying driving element, a reset gate and a feed pump; an adjusting mounting plate is provided with an adjusting feeding mechanism; a laminar flow feeding module is provided with a shunt conical protrusion and a ring-shaped variable-diameter flow guide cavity to make the feed flow in a laminar flow and be released in a cyclone according to the water absorption degree; and a layer depth adjusting module is provided with an air pressure regulating pump and an air bag to adjust the feeding depth.

Description

Technical Field

[0001] This invention relates to the field of aquatic seedling equipment technology, specifically to a fermented micro-particle feed feeding device for red claw crayfish seedlings. Background Technology

[0002] Fermented micro-particle feed is a new type of feed that has been gradually promoted and used in the breeding and farming of special aquatic products such as redclaw crayfish in recent years. This type of feed uses microbial fermentation technology as its core, processing raw materials into small-sized granular products after fermentation. The granules are rich in active bacteria, organic acids, and various metabolites produced during fermentation, making the nutrients easier for crayfish larvae to digest and absorb. Its palatability is also significantly better than ordinary formulated feed, thus it is widely used in the initial feeding stage of crayfish larvae. Compared to traditional pelleted feed, fermented micro-particle feed also has a certain feeding-enhancing effect, stimulating crayfish larvae to actively feed, which significantly helps improve the survival rate and growth rate of crayfish larvae.

[0003] However, fermented micro-particle feed has also revealed some unavoidable problems in practical use, the most prominent of which is the difficulty in storage and feeding caused by its own physical characteristics. Because a certain amount of moisture and sticky substances remain in the feed during fermentation, and given the small size and large surface area of ​​the particles, they easily absorb moisture and become damp upon contact with air humidity or a slight increase in ambient humidity. After absorbing moisture, the particles stick together, gradually forming clumps of varying sizes, destroying the originally loose and free-flowing state of the particles and significantly reducing the feed's fluidity. Once this clumping occurs, the feed is difficult to discharge normally through the feeding device's pipes or outlet, often causing partial blockages in the feeding equipment. This forces staff to stop the machine for manual unblocking or cleaning, increasing the workload of daily management and disrupting the normal feeding rhythm, adversely affecting the timely and adequate feeding of shrimp larvae.

[0004] Besides the clumping problem, the stickiness of fermented micro-particle feed poses another significant challenge: feed particles easily adhere to the inner walls of storage containers and conveying pipelines. The longer the feed remains in the container or pipeline, the more severe the adhesion becomes. Over time, this not only compresses the effective storage space and conveying channels but also allows bacteria to grow on the adhered areas due to prolonged dampness, affecting the hygiene and quality of subsequent feed feeding and indirectly impacting the health of shrimp larvae. Currently, most feeding devices are not adequately designed to address this characteristic. Storage structures and conveying pipelines often follow the conventional design principles of ordinary compound feed, lacking targeted moisture-proofing and dehumidification measures. As a result, the feed remains in a relatively sealed environment with uncontrolled humidity for extended periods inside the device, making it difficult to fundamentally solve the clumping and adhesion problems.

[0005] Meanwhile, due to individual differences in particle density, size, and water absorption rate, fermented micro-particle feed exhibits varying settling behavior across different batches and even within the same batch after contact with water. Some particles absorb water quickly and increase in density rapidly, allowing them to settle quickly to the water layer where shrimp larvae are active. Other particles absorb water relatively slowly and remain suspended or even float for a short period after being placed in the water. If the feeding device lacks necessary guidance and control when discharging the feed, these unabsorbed particles may float directly on the surface, failing to settle in time to the water layer where shrimp larvae are actually foraging. Ultimately, they may diffuse with the water flow or be carried out of the pond during subsequent cleaning, resulting in low actual feed utilization. Low feed utilization means that farmers have to increase the amount of feed to ensure that shrimp larvae have enough to eat. However, a considerable proportion of this extra feed is not consumed by the shrimp larvae and remains suspended or deposited in the nursery pond water for a long time. It gradually decomposes and consumes dissolved oxygen in the water, while releasing metabolic products such as ammonia nitrogen, which accelerates the eutrophication process of the water body and puts continuous pressure on the nursery water quality.

[0006] Furthermore, the activity level and foraging habits of redclaw crayfish change at different growth stages during the larval stage. Larvae are mostly concentrated in the upper and middle layers of the water, while as they grow, their activity range gradually shifts to the lower and middle layers. If fermented micro-particle feed is not released at the appropriate water layer to match this growth pattern of the crayfish larvae, even if the feed itself is highly nutritious and palatable, it will be difficult for the larvae to consume it effectively, and the feed's value cannot be fully realized.

[0007] In summary, while fermented micro-particle feed has significant advantages in terms of nutrition and palatability, its inherent properties, such as easy moisture absorption and clumping, easy adhesion to pipe walls, and inconsistent water absorption and settling characteristics, pose practical difficulties for storage, dryness preservation, smooth transportation, and precise feeding. Existing feeding devices are generally inadequate in addressing these characteristics. There is an urgent need to design a specialized feeding device that can simultaneously achieve moisture prevention and dryness preservation, smooth transportation, and precise stratified feeding, in order to fully leverage the nutritional advantages of this type of feed and improve its practical utilization effect in the breeding process of red claw crayfish. Summary of the Invention

[0008] To solve the above-mentioned technical problems, the present invention provides a fermented micro-particle feed feeding device for red claw crayfish seedlings.

[0009] To achieve the above objectives, the present invention provides the following technical solution: A fermented micro-particle feed feeding device for red claw crayfish seedlings includes a floating plate, an annular air bladder on the outside of the floating plate, a traction frame fitted around the annular air bladder and fixed to the floating plate, a storage cylinder above the floating plate, a feed pipe at the upper end of the storage cylinder with a screw cap, a conical guide cylinder at the lower end of the storage cylinder, and an adjustment mounting plate below the floating plate. The device also includes a drying and holding mechanism, a clustering pump mechanism, and an adjusting feeding mechanism.

[0010] As a further embodiment of the present invention: the drying and holding mechanism includes a liquid collecting cylinder disposed on the outside of the conical guide cylinder, a drain pipe disposed at the lower end of the liquid collecting cylinder, a filter screen cylinder disposed inclinedly inside the conical guide cylinder and the storage cylinder directly opposite the liquid collecting cylinder, the lower end of the filter screen cylinder communicating with the liquid collecting cylinder, the upper end of the filter screen cylinder being connected to the inner wall of the storage cylinder, a heat conducting pipe disposed in the middle of the inside of the filter screen cylinder, a phase change columnar cold end disposed inside the heat conducting pipe, a refrigerant being filled inside the heat conducting pipe in conjunction with the phase change columnar cold end, the lower end of the heat conducting pipe extending into the liquid collecting cylinder, and the other end of the heat conducting pipe and the phase change columnar cold end being connected to the inner wall of the storage cylinder.

[0011] As a further aspect of the present invention: a phase change disc-shaped hot end connected to the phase change columnar cold end is provided on the outside of the storage cylinder, a hot end heat sink is provided on the outside of the phase change disc-shaped hot end, and a filter screen is provided on the outside of the hot end heat sink.

[0012] As a further aspect of the present invention, the heat pipe has several condensation protrusions arranged at equal angles on its outer side.

[0013] As a further embodiment of the present invention: the clustered pumping mechanism is disposed between the floating plate and the adjusting mounting plate, including a pumping guide cylinder disposed on the floating plate, the lower end of the conical guide cylinder being connected to the pumping guide cylinder through a conveying guide pipe, a connecting guide cylinder being disposed at the upper end of the adjusting mounting plate, and a plurality of clusters of spiral pumping conveying pipes being disposed at equal angles between the pumping guide cylinder and the connecting guide cylinder, the two ends of the spiral pumping conveying pipes being connected and installed to the pumping guide cylinder and the connecting guide cylinder respectively.

[0014] As a further aspect of the present invention: an inclined pumping guide pipe is connected to the lower side of the pumping guide cylinder, and a conveying pump is connected in series on the pumping guide pipe.

[0015] As a further aspect of the present invention: a conveying drive component is provided at the middle position of the conical guide cylinder, and the conveying drive component is fixed on the inner wall of the conical guide cylinder by a plurality of guide mounting columns arranged at equal angles. The lower end of the conveying drive component is provided with a conveying spiral plate through a rotating shaft and a conveying guide pipe.

[0016] As a further aspect of the present invention: the upper end of the pumping guide cylinder is equipped with a reset gate via a reset shaft at the lower end of the conveying guide pipe.

[0017] As a further aspect of the present invention: the adjusting feeding mechanism is disposed on the adjusting mounting plate, including a laminar flow feeding module and a layer depth adjusting module disposed within the adjusting mounting plate.

[0018] As a further aspect of the present invention: the laminar flow feeding module includes an annular variable diameter guide cavity set inside the adjusting mounting plate, an annular open feeding port set on the edge of the adjusting mounting plate, the annular open feeding port being connected to the annular variable diameter guide cavity, and a plurality of supporting guide columns being vertically arranged at equal angles inside the annular open feeding port.

[0019] As a further aspect of the present invention: a diversion cone-shaped protrusion is provided at the bottom of the annular variable diameter guide cavity directly opposite the connecting guide cylinder, and the guide area of ​​the annular variable diameter guide cavity decreases sequentially from the center outward.

[0020] As a further aspect of the present invention: an annular convex flow-slowing cylinder is provided on the upper side of the adjustment mounting plate, an annular guide protrusion is provided at the connection between the annular convex flow-slowing cylinder and the inner side of the adjustment mounting plate, an annular flow-dividing plate is provided in the annular variable diameter guide cavity below the annular convex flow-slowing cylinder, and the connection between the annular convex flow-slowing cylinder and the outer side of the adjustment mounting plate is connected to the annular flow-dividing plate by a plurality of guide mounting columns arranged at equal angles.

[0021] As a further embodiment of the present invention: the layer depth adjustment module includes annular flow equalization pipes and annular airbags respectively arranged on the upper and lower sides of the adjustment mounting plates at both ends of the supporting flow guide column. The supporting flow guide column is provided with a connecting conduit. The two ends of the connecting conduit are respectively connected to the annular flow equalization pipe and the annular airbag. A telescopic conduit is connected to the annular flow equalization pipe. The telescopic conduit extends upward out of the floating plate, and a pressure regulating air pump is provided at the upper end of the telescopic conduit.

[0022] Compared with the prior art, the beneficial effects of the present invention are: This device effectively solves the technical problem of clumping in fermented micro-particle feed due to moisture, ensuring smooth feed storage and feeding. Through the coordinated operation of the filter cylinder, heat pipe, phase change columnar cold end, condensation protrusion, phase change disc-shaped hot end, hot end radiator, liquid collection cylinder, and drain pipe in the drying and maintaining mechanism, it continuously absorbs heat from the inside of the storage cylinder and conical feed guide cylinder based on the principle of phase change heat pipes, and condenses and removes moisture from the cylinder, maintaining a low-humidity and dry environment inside the storage cylinder at all times. Fermented micro-particle feed is highly sticky and easily clumps when damp, making it impossible to feed normally. This device inhibits this phenomenon from the source, ensuring that the feed maintains good loose flowability throughout the storage and transportation process, avoiding malfunctions such as blockage and feed interruption caused by clumping, and significantly improving the reliability and continuity of the feeding device operation.

[0023] This system achieves multi-path, balanced, and efficient feed delivery, preventing blockages in the feed pipelines. The clustering pump mechanism, through a conveying drive, conveying spiral plates, and a reset gate, enables quantitative and controllable feed delivery. Water from the nursery pond is introduced and mixed with the feed using a feed pump. The mixed feed and water are then pumped in parallel through multiple clustered spiral pumps into the feed pipelines. Because the individual pipe diameters are smaller and the flow rates are higher after clustering, feed particles are effectively prevented from adhering and depositing on the pipe walls due to low flow rates. This overcomes the shortcomings of traditional single-pipeline feeding devices, such as easy blockage and uneven flow, ensuring high efficiency and stability in feed delivery.

[0024] This system enables laminar flow and uniform feeding of fermented micro-particle feed, significantly improving feeding accuracy and utilization. The laminar flow feeding module, through the combination of diverting conical protrusions, annular variable-diameter guide cavities, and supporting guide columns, ensures a stable laminar flow in the feed-carrying water before discharge. This avoids turbulence disrupting feed distribution uniformity and guarantees even feed diffusion around the regulating plate, overcoming the problems of concentrated localized feeding, feed waste, and uneven feeding among shrimp larvae that often occur with traditional feeding methods.

[0025] The on-demand release of feed through a swirling separation mechanism further improves feed utilization. An annular convex flow-slowing cylinder, combined with annular guide protrusions and annular diverter plates, forms a controllable swirling flow. This causes feeds with high water absorption and a tendency to float to remain within the annular convex flow-slowing cylinder and accelerate water absorption. Once the feed has absorbed an appropriate amount of water and its weight has increased, it is then reintegrated into the main laminar flow and discharged for feeding due to centrifugal force. This ensures that feeds with different water absorption characteristics are released at the appropriate time and water level, preventing feed from floating away after being discharged and thus becoming unusable by shrimp larvae. This significantly improves feeding accuracy and feed utilization.

[0026] This method reduces water pollution levels, extends the water exchange cycle during the seedling rearing process, and minimizes stress damage to shrimp larvae. Due to significantly improved feed utilization, the actual total amount of feed required is reduced, resulting in a decrease in the amount of uneaten feed in the water and a marked slowdown in eutrophication of the seedling rearing ponds. This not only extends the water exchange cycle during the seedling rearing process but also improves water quality within that cycle, effectively preventing stress-related losses to redclaw crayfish larvae caused by frequent water exchanges and promoting their healthy growth.

[0027] This device allows for flexible adjustment of feeding depth to meet the needs of different larval stages of redclaw crayfish. The depth adjustment module, through a pressure-regulating air pump, telescopic conduit, annular flow equalization pipe, and connecting conduit, works in conjunction with an annular airbag beneath the mounting plate. Based on Archimedes' principle, the buoyancy of the annular airbag can be flexibly changed, thereby adjusting the sinking depth of the mounting plate and its laminar flow feeding module in the water. This structure enables the device to adjust the feeding depth in real time according to the differentiated feeding water layer requirements of redclaw crayfish at different growth stages, achieving stratified and precise feeding. This overcomes the shortcomings of traditional feeding devices with fixed feeding depths and difficulty in adapting to the foraging habits of crayfish at different growth stages.

[0028] The overall structure is stable and easy to operate and maintain. The device relies on the annular airbag on the outside of the floating plate to provide basic buoyancy and achieve overall floating. The external towing frame protects the airbag and facilitates the movement, mooring and recovery of the device. The filter screen on the outside of the radiator at the hot end protects the heat dissipation components, preventing impurities from entering and affecting the heat dissipation efficiency, while also preventing users or shrimp larvae from directly contacting the heat dissipation components. The overall structure of the device is reasonable and easy to operate and maintain. Attached Figure Description

[0029] Figure 1 This is a side top view schematic diagram of a fermented micro-particle feed feeding device for raising red claw crayfish seedlings.

[0030] Figure 2 This is a side-view diagram of a feeding device for fermented micro-particle feed used in the breeding of red claw crayfish.

[0031] Figure 3 This is a partial cross-sectional schematic diagram of the drying and holding mechanism and the clustering pumping mechanism in a fermented micro-particle feed feeding device for raising red claw crayfish seedlings.

[0032] Figure 4 for Figure 3 An enlarged schematic diagram of point a in the middle.

[0033] Figure 5 This is a cross-sectional schematic diagram of the drying and maintaining mechanism in a fermented micro-particle feed feeding device for raising red claw crayfish.

[0034] Figure 6 This is a partial cross-sectional schematic diagram of the filter cylinder in a fermented micro-particle feed feeding device for raising red claw crayfish.

[0035] Figure 7 for Figure 6 Further cross-sectional view based on the above.

[0036] Figure 8 This is a partial cross-sectional schematic diagram of the feeding mechanism in a fermented micro-particle feed feeding device for raising red claw crayfish seedlings.

[0037] 1-Floating plate, 2-Traction frame, 3-Storage cylinder, 4-Feed pipe, 5-Screw cap, 6-Conical guide cylinder, 7-Conveying guide pipe, 8-Collection cylinder, 9-Drain pipe, 10-Annular airbag, 11-Pressure regulating pump, 12-Pumping guide pipe, 13-Spiral pumping conveying pipe, 14-Pumping guide cylinder, 15-Telescopic guide pipe, 16-Adjusting mounting plate, 17-Connecting guide cylinder, 18-Annular convex flow-retardant cylinder, 19-Annular open feeding port, 20-Hot end radiator, 21-Filter screen cover, 22-Material conveying Pump, 23-Supporting guide column, 24-Phase change disc-shaped hot end, 25-Filter screen cylinder, 26-Heat conduction pipe, 27-Conveying drive component, 28-Material guide mounting column, 29-Conveying spiral plate, 30-Reset gate, 31-Reset rotating shaft, 32-Condensing protrusion, 33-Phase change column-shaped cold end, 34-Flow diversion cone-shaped protrusion, 35-Annular flow equalization pipe, 36-Annular airbag, 37-Connecting conical pipe, 38-Annular guide protrusion, 39-Annular flow divider, 40-Flow guide mounting column, 41-Annular variable diameter guide cavity. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose. Example 1.

[0039] Please see Figures 1-3 and Figures 5-7 In this embodiment of the invention, a fermented micro-particle feed feeding device for red claw crayfish seedlings includes a floating plate 1, an annular airbag 10 is provided on the outer side of the floating plate 1, a traction frame 2 is sleeved on the outer side of the annular airbag 10, the traction frame 2 is fixed on the floating plate 1, a storage cylinder 3 is provided above the floating plate 1, a feed pipe 4 is provided at the upper end of the storage cylinder 3, a screw cap 5 is provided on the feed pipe 4, a conical guide cylinder 6 is provided at the lower end of the storage cylinder 3, and an adjustment mounting plate 16 is provided below the floating plate 1. It also includes a drying and holding mechanism, a clustering pumping mechanism, and an adjusting feeding mechanism.

[0040] The drying and holding mechanism includes a liquid collecting cylinder 8 located outside the conical guide cylinder 6, a drain pipe 9 located at the lower end of the liquid collecting cylinder 8, and a filter screen cylinder 25 inclinedly arranged inside the conical guide cylinder 6 and the storage cylinder 3 directly opposite the liquid collecting cylinder 8. The lower end of the filter screen cylinder 25 is connected to the liquid collecting cylinder 8, and the upper end of the filter screen cylinder 25 is connected to the inner wall of the storage cylinder 3. A heat conducting pipe 26 is located in the middle of the interior of the filter screen cylinder 25, and a phase change columnar cold end 33 is located inside the heat conducting pipe 26. The interior of the heat conducting pipe 26 is fitted with a phase change columnar cold end 33. The phase change columnar cold end 33 is filled with refrigerant. The lower end of the heat pipe 26 extends into the liquid collection cylinder 8. The other end of the heat pipe 26 and the phase change columnar cold end 33 is connected to the inner wall of the storage cylinder 3. The outer side of the storage cylinder 3 is provided with a phase change disc-shaped hot end 24 connected to the phase change columnar cold end 33. The outer side of the phase change disc-shaped hot end 24 is provided with a hot end radiator 20. The outer side of the hot end radiator 20 is provided with a filter screen 21. Several condensation protrusions 32 are provided at equal angles on the outer side of the heat pipe 26.

[0041] This device floats on the surface of the seedling pond using the buoyancy generated by the annular airbags 10 displacing the water. The traction frame 2 provides protection for the device's movement, mooring, and airbag protection. Fermented micro-particle feed is fed into the storage cylinder 3 through the feed pipe 4. The screw cap 5 is opened and closed to add feed and seal against moisture, reducing the possibility of external moisture entering the storage cylinder 3 from the source.

[0042] Because fermented micro-particle feed is naturally sticky, it easily clumps together when damp, making it impossible to feed normally. Therefore, the drying and maintaining mechanism continuously dehumidifies and cools the feed throughout the storage and transportation process. Its working principle is based on gravity-type heat pipe phase change heat transfer. The filter cylinder 25 uses a mesh structure to separate the feed from the liquid, preventing feed particles from being lost with the liquid and ensuring that any seepage or condensation of the liquid can be smoothly guided and discharged. Its inclined posture allows the liquid to flow continuously and without stagnation to the liquid collection cylinder 8 under its own gravity, and then be discharged outside the device through the drain pipe 9. The refrigerant filled inside the heat pipe 26 is the core working fluid for dehumidification and cooling. The refrigerant continuously undergoes a phase change cycle of evaporation and heat absorption and condensation and heat release inside the heat pipe 26. The heat is transferred in a directional manner through the absorption and release of latent heat. The phase change columnar cold end 33 continuously absorbs the heat brought by feed fermentation and environmental humidity inside the storage cylinder 3 and the conical guide cylinder 6, keeping the surface temperature around the cold end at a low level. When the water vapor in the cylinder encounters the surface of the heat pipe 26 and the condensation protrusion 32 with a temperature lower than its dew point, it will condense and liquefy. The condensation protrusion 32 enhances this condensation process by increasing the heat exchange area, causing the water vapor to condense into fine droplets. The droplets flow into the liquid collection cylinder 8 and are discharged through the drain pipe 9, thereby continuously reducing the humidity inside the cylinder. The heat absorbed at the cold end is conducted through the refrigerant phase change cycle to the phase change disk-shaped hot end 24 for concentrated release. The hot end radiator 20 further dissipates the heat to the external environment through natural convection and radiation, forming a complete heat transfer and outflow path. This ensures that the heat pipe 26 remains at a constant low temperature, allowing the condensation and dehumidification effect to be maintained stably for a long time. The filter screen 21 protects the heat dissipation structure, preventing impurities from entering and affecting the heat dissipation efficiency. Through the synergistic effect of the phase change cycle and condensation flow, the inside of the storage cylinder 3 and the conical guide cylinder 6 is kept dry, effectively preventing the fermented micro-particle feed from becoming damp and clumping, and ensuring its good flowability during storage and transportation. Example 2.

[0043] Based on Example 1, please refer to Figures 1-5In this embodiment of the invention, the clustered pumping mechanism is disposed between the floating plate 1 and the adjusting mounting plate 16, including a pumping guide cylinder 14 disposed on the floating plate 1. The lower end of the conical guide cylinder 6 is connected to the pumping guide cylinder 14 through a conveying guide pipe 7. A connecting guide cylinder 17 is disposed at the upper end of the adjusting mounting plate 16. A plurality of clusters of spiral pumping conveying pipes 13 are disposed at equal angles between the pumping guide cylinder 14 and the connecting guide cylinder 17. The two ends of the spiral pumping conveying pipes 13 are respectively connected and installed to the pumping guide cylinder 14 and the connecting guide cylinder 17. An inclined pumping guide pipe 12 is connected to the lower side of the material cylinder 14. A material pump 22 is connected in series on the pumping guide pipe 12. A conveying drive component 27 is provided in the middle of the conical guide cylinder 6. The conveying drive component 27 is fixed to the inner wall of the conical guide cylinder 6 by a plurality of guide mounting columns 28 arranged at equal angles. The lower end of the conveying drive component 27 is connected to the conveying guide pipe 7 by a rotating shaft and a conveying spiral plate 29 is provided. The upper end of the pumping guide cylinder 14 is connected to the lower end of the conveying guide pipe 7 by a reset gate 30 connected to the reset rotating shaft 31.

[0044] In the feed conveying process, the conveying drive unit 27 drives the conveying spiral plate 29 to rotate, pushing the dried fermented micro-particle feed along the conveying guide pipe 7 to open the reset gate 30 and convey it into the pumping guide cylinder 14. After the conveying spiral plate 29 stops rotating, the reset gate 30 automatically resets and closes under the action of the reset shaft 31, ensuring that a sealed space is formed inside the pumping guide cylinder 14 to prevent water backflow or feed backflow. After the feed pump 22 starts, the upper layer of water from the nursery pond is introduced into the pumping guide cylinder 14 through the pumping guide pipe 12, where it is fully mixed with the feed in the cylinder to form a water-feed mixture. Subsequently, this mixture is evenly distributed into the multi-cluster spiral pumping conveying pipe 13 through parallel diversion. Because the single pipe diameter is smaller and the flow cross-section is reduced after clustering, according to the principle of fluid continuity, the flow velocity in the pipe increases accordingly while the flow rate remains basically unchanged. This effectively avoids feed from adhering and depositing on the pipe wall due to excessively low flow velocity, thereby ensuring that the water-feed mixture is conveyed in a multi-path parallel, efficient and stable manner. Example 3.

[0045] Based on Example 2, please refer to Figures 1-3 and Figure 8 In this embodiment of the invention, the adjusting feeding mechanism is disposed on the adjusting mounting plate 16, and includes a laminar flow feeding module and a layer depth adjusting module disposed within the adjusting mounting plate 16; The laminar flow feeding module includes an annular variable diameter guide cavity 41 inside the adjusting mounting plate 16. An annular open feeding port 19 is provided on the edge of the adjusting mounting plate 16, communicating with the annular variable diameter guide cavity 41. Several supporting guide columns 23 are vertically arranged at equal angles inside the annular open feeding port 19. A diverting cone-shaped protrusion 34 is provided at the bottom of the annular variable diameter guide cavity 41, directly opposite the connecting feed cylinder 17. The annular variable diameter guide cavity 41 extends from its center outwards... The external flow guiding area decreases sequentially. An annular convex flow-slowing cylinder 18 is provided on the upper side of the adjustment mounting plate 16. An annular flow guiding protrusion 38 is provided at the connection between the annular convex flow-slowing cylinder 18 and the inner side of the adjustment mounting plate 16. An annular flow-dividing plate 39 is provided in the annular variable diameter flow guiding cavity 41 below the annular convex flow-slowing cylinder 18. The connection between the annular convex flow-slowing cylinder 18 and the outer side of the adjustment mounting plate 16 is connected to the annular flow-dividing plate 39 through a plurality of flow guiding mounting columns 40 arranged at equal angles. The layer depth adjustment module includes annular flow equalization pipes 35 and annular airbags 36 respectively arranged on the upper and lower ends of the adjustment mounting plates 16 at both ends of the support guide column 23. The support guide column 23 is provided with a connecting conduit 37. The two ends of the connecting conduit 37 are connected to the annular flow equalization pipe 35 and the annular airbag 36 respectively. A telescopic conduit 15 is connected to the annular flow equalization pipe 35. The telescopic conduit 15 extends upward out of the floating plate 1, and a pressure regulating air pump 11 is provided at the upper end of the telescopic conduit 15.

[0046] After the water-feed mixture enters the regulating installation plate 16, it is first guided by the diversion cone-shaped protrusion 34, and diffuses evenly into the annular variable diameter guide cavity 41. According to the fluid continuity equation, as the guide cross section gradually narrows from the center outward, the fluid velocity gradually increases during diffusion, the flow state tends to stabilize, and the turbulence intensity decreases, thus forming a laminar flow state, reducing the damage of turbulence to the uniformity of feed particle distribution. Several supporting guide columns 23 divide the circumferential outflow into several uniform flow channels, so that the fermented micro-particle feed is finally discharged evenly through the annular open feeding port 19 in a stable laminar flow form, avoiding waste caused by excessive local feeding concentration or uneven feeding of shrimp larvae. Due to differences in the water absorption of different feed particles, the balance between the particle's own weight and the buoyancy it experiences changes as the water absorption increases. Some feed particles with higher water absorption and density will float up and down during the flow guidance process. The annular guide protrusion 38 moderately guides the main water flow downwards, preventing uncontrollable turbulence when the fluid flows through the annular convex slow-flow tube 18 area and maintaining the stability of the main laminar flow. The annular diverter 39 guides some water into the interior of the annular convex slow-flow tube 18, forming a controllable vortex. This prevents floating feed from adhering to the tube wall for a long time and accelerates the water absorption process of the retained feed. After the feed absorbs a certain amount of water and its weight increases, it will detach from the annular convex slow-flow tube 18 under the centrifugal force generated by the vortex, return to the main laminar flow channel, and finally be discharged through the annular open feeding port 19. Feed particles that do not float significantly will be directly discharged with the laminar flow and remain in the corresponding water layer or slowly sink, which is exactly where the red claw crayfish larvae live and forage. Through the synergistic effect of laminar flow guidance and swirling separation, fermented micro-particle feed can be fully released at the appropriate time and water layer, avoiding the inability of shrimp larvae to utilize it due to floating away after feeding. This significantly improves feeding accuracy and utilization rate. The increased feed utilization rate reduces the actual total amount of feed, thereby reducing the amount of uneaten feed in the water. This significantly slows down the eutrophication process, extends the water exchange cycle for larvae rearing, and maintains a high water quality level during the cycle, effectively reducing the stress damage to shrimp larvae caused by frequent water exchanges.

[0047] Regarding the adjustment of feeding depth, the pressure regulating air pump 11 regulates the air pressure within the annular flow equalization pipe 35 via the telescopic conduit 15. Changes in air pressure are synchronously transmitted to the annular airbag 36 via the connecting conduit 37, enabling inflation or deflation of the annular airbag 36. Changes in the volume of the annular airbag 36 alter the volume of water it displaces, thus changing the buoyancy of the annular airbag 36. This causes the regulating mounting plate 16 and its upper laminar flow feeding module to rise and fall as a whole in the water, achieving flexible control of the feeding depth. Its adjustment mechanism is similar to that of the ballast tank-type buoyancy regulation principle. Based on this, operators can adjust the feeding depth in real time using the pressure regulating air pump 11 according to the differentiated feeding water layer requirements of red claw crayfish at different seedling stages. Combined with the laminar flow feeding module, this achieves layered, uniform, precise, and controllable fermented micro-particle feed feeding, thereby improving the overall seedling feeding effect and feed utilization efficiency.

[0048] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A feeding device for fermented micro-particle feed for redclaw crayfish seedlings, comprising a floating plate, an annular airbag on the outer side of the floating plate, a traction frame fitted over the annular airbag and fixed to the floating plate, a storage cylinder above the floating plate, a feed pipe at the upper end of the storage cylinder, a cap on the feed pipe, a conical guide cylinder at the lower end of the storage cylinder, and an adjustment mounting plate below the floating plate, characterized in that... Also includes: The drying and holding mechanism includes a liquid collecting cylinder located outside the conical guide cylinder, a drain pipe located at the lower end of the liquid collecting cylinder, a filter screen cylinder located inclined inside the conical guide cylinder and the storage cylinder directly opposite the liquid collecting cylinder, the lower end of the filter screen cylinder being connected to the liquid collecting cylinder, the upper end of the filter screen cylinder being connected to the inner wall of the storage cylinder, a heat conducting pipe located in the middle of the inside of the filter screen cylinder, a phase change columnar cold end located inside the heat conducting pipe, a refrigerant being filled inside the heat conducting pipe in conjunction with the phase change columnar cold end, the lower end of the heat conducting pipe extending into the liquid collecting cylinder, and the other end of the heat conducting pipe and the phase change columnar cold end being connected to the inner wall of the storage cylinder. The clustered pumping mechanism is located between the floating plate and the regulating mounting plate. It includes a pumping guide cylinder on the floating plate, the lower end of the conical guide cylinder is connected to the pumping guide cylinder through a conveying guide pipe, and a connecting guide cylinder is provided at the upper end of the regulating mounting plate. Several clusters of spiral pumping conveying pipes are arranged at equal angles between the pumping guide cylinder and the connecting guide cylinder. The two ends of the spiral pumping conveying pipes are respectively connected and installed to the pumping guide cylinder and the connecting guide cylinder. The adjustment feeding mechanism is set on the adjustment mounting plate, including the laminar flow feeding module and the layer depth adjustment module set inside the adjustment mounting plate.

2. The fermented micro-particle feed feeding device for redclaw crayfish seedling cultivation according to claim 1, characterized in that, The storage cylinder is provided with a phase change disc-shaped hot end connected to the phase change columnar cold end. A hot end heat sink is provided on the outside of the phase change disc-shaped hot end, and a filter screen is provided on the outside of the hot end heat sink.

3. The fermented micro-particle feed feeding device for redclaw crayfish seedling cultivation according to claim 2, characterized in that, The heat pipe has several condensation protrusions at equal angles on its outer side.

4. The fermented micro-particle feed feeding device for redclaw crayfish seedling cultivation according to claim 1, characterized in that, An inclined pumping guide pipe is connected to the lower side of the pumping guide cylinder, and a conveying pump is connected in series on the pumping guide pipe.

5. The fermented micro-particle feed feeding device for redclaw crayfish seedling cultivation according to claim 4, characterized in that, A conveying drive component is provided at the middle position of the conical guide cylinder. The conveying drive component is fixed to the inner wall of the conical guide cylinder by a number of guide mounting columns arranged at equal angles. The lower end of the conveying drive component is equipped with a conveying spiral plate through a rotating shaft and a conveying guide pipe.

6. The fermented micro-particle feed feeding device for redclaw crayfish seedling rearing according to claim 5, characterized in that, The upper end of the pumping guide cylinder is connected to the lower end of the conveying guide pipe, and a reset gate is provided through a reset shaft.

7. The fermented micro-particle feed feeding device for redclaw crayfish seedlings according to claim 1, characterized in that, The laminar flow feeding module includes an annular variable diameter guide cavity set inside the adjusting mounting plate, an annular open feeding port set on the edge of the adjusting mounting plate, the annular open feeding port being connected to the annular variable diameter guide cavity, and several supporting guide columns being vertically set at equal angles inside the annular open feeding port.

8. The fermented micro-particle feed feeding device for redclaw crayfish seedlings according to claim 7, characterized in that, The bottom of the annular variable diameter guide cavity, which is directly opposite the connecting guide cylinder, is provided with a flow-dividing cone-shaped protrusion, and the flow-dividing area of ​​the annular variable diameter guide cavity decreases sequentially from the center to the outside.

9. A fermented micro-particle feed feeding device for redclaw crayfish seedling rearing according to claim 8, characterized in that, An annular convex flow-slowing cylinder is provided on the upper side of the adjustment mounting plate. An annular flow-guiding protrusion is provided at the connection between the annular convex flow-slowing cylinder and the inner side of the adjustment mounting plate. An annular flow-dividing plate is provided in the annular variable diameter flow-guiding cavity below the annular convex flow-slowing cylinder. The connection between the annular convex flow-slowing cylinder and the outer side of the adjustment mounting plate is connected to the annular flow-dividing plate by several flow-guiding mounting columns arranged at equal angles.

10. A fermented micro-particle feed feeding device for redclaw crayfish seedling rearing according to claim 7, characterized in that, The layer depth adjustment module includes annular flow equalization pipes and annular airbags respectively set on the upper and lower parts of the adjustment mounting plates at both ends of the support guide column. The support guide column is provided with a connecting conduit, and the two ends of the connecting conduit are respectively connected to the annular flow equalization pipe and the annular airbag. A telescopic conduit is connected to the annular flow equalization pipe, and the telescopic conduit extends upward to the floating plate. A pressure regulating air pump is provided at the upper end of the telescopic conduit.

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