Shrimp culture pond and grading, classifying and filtering device

Abstract

The invention discloses a shrimp culture pond which comprises a pond body and a grading and classifying filtering device arranged at the water outlet end of the pond body, the grading and classifying filtering device is composed of a base body on the lower portion and a column body on the upper portion, and the outer diameter of the base body is gradually reduced from the lower portion to the upper portion; the top of the seat body upwards forms a cylinder; the interior of the fixed part is hollow to form a cavity for accommodating the movable part; a plurality of first through holes for communicating the external space with the cavity are formed in the seat body, and the diameter of each first through hole is 0.5-1.5 mm; a movable part; the collecting element is connected with the collecting element fixing section, filters shrimp shells in water flow and coaxially rotates relative to the column body of the fixing part; the water body driving assembly drives the water body to flow towards the direction of the fixed part. The water body driving assembly drives water flow to converge towards the fixed part, shrimp manure in the water body deposits towards the base in the process, the movable part moves relative to the fixed part, the through hole of the fixed part communicates with the outside, and the shrimp manure is discharged out of the water body from the through hole; shrimp shells are collected and filtered through the collecting element and then are cleaned intensively.

Description

Technical Field

[0001] The invention relates to the fields of aquaculture and environmental protection, and in particular to a shrimp culture pond and a grading and classification filtering device. Background Art

[0002] In order to ensure the growth of shrimp under intensive and high-density conditions, it is necessary to build a water environment suitable for their survival. During the metabolism process, shrimps will excrete a large amount of excrement containing nitrogen and phosphorus components, and shrimp shells will be shed during the growth process. These solid substances enter the water body, which will increase the content of suspended solids and nitrogen and phosphorus in the water body, leading to eutrophication of the water body, which has an adverse effect on the survival and growth of shrimps;

[0003] In order to solve the negative impact of the continuous input of nitrogen, phosphorus and suspended matter on the water environment, a device is urgently needed to separate and discharge the above-mentioned solid matter from the water. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems in the above-mentioned technology to a certain extent. To this end, the first object of the present invention is to provide a grading and classification filtering device for aquaculture ponds, which can automatically collect and separate solid matter such as shrimp shells and feces in water.

[0005] The second object of the present invention is to provide a shrimp culture pond suitable for intensive and high-density conditions.

[0006] To achieve the above-mentioned purpose, the first embodiment of the present invention provides a grading and classification filtering device for shrimp breeding ponds, comprising:

[0007] Fixed part: when in use, it is installed in the breeding barrel or breeding pond, and consists of a lower seat body and an upper column body to form a funnel-shaped structure. The outer diameter of the seat body gradually decreases from the bottom to the top to form the funnel part; the top of the seat body forms a column upward to form the mouth of the funnel; the fixed part is hollow inside to form a cavity to accommodate the movable part;

[0008] The fixing portion seat body forms a plurality of first through holes, and the diameter of the first through holes is between 0.5 and 1.5 mm; when the first through holes are not blocked, water can flow into the cavity through the first through holes;

[0009] The movable part is hollow, with the top and bottom surfaces open to form a passage for water to flow through; it is arranged in the cavity of the fixed part and can rotate coaxially relative to the fixed part, and the movable part forms a second through hole corresponding to the first through hole, and the aperture of the second through hole is not less than that of the first through hole; the movable part rotates relative to the fixed part so that the first through hole can be aligned with the second through hole, or the first through hole is closed; the top end of the movable part extends out of the top surface of the column to form a fixed section of the collecting element; when the first through hole and the second through hole are connected, the water pressure will cause the surrounding water to flow out to the outside through the channels of the first through hole and the second through hole, and in the process, small particle feed and shrimp excrement will be taken out together.

[0010] Collecting element: connected to the fixed section of the collecting element, filtering shrimp shells in the water flow, and rotating coaxially relative to the column of the fixed part;

[0011] Water driving component: drives the water to flow towards the fixed part.

[0012] According to the grading and classification filtering device of the embodiment of the present invention, the fixed part is fixed at the water outlet of the breeding pond, and the water driving component drives the water to converge to the fixed part. During the process, the shrimp feces in the water body are deposited to the base, and the movable part rotates relative to the fixed part to connect the through hole of the fixed part with the outside, and the shrimp feces are discharged from the water body through the through hole; the shrimp shells are collected and filtered by the collecting element and then cleaned together.

[0013] In addition, the shrimp breeding pond grading and classification filtering device proposed in the above embodiment of the present invention may also have the following additional technical features:

[0014] Optionally, the seat body is truncated cone-shaped or hemispherical.

[0015] Optionally, the column is also provided with a plurality of through holes.

[0016] Optionally, the collecting element is connected to the movable part via a plurality of flexible cables.

[0017] Optionally, the collecting element is a round bowl with an open top, and the sides and bottom of the round bowl are filter screens.

[0018] To achieve the above-mentioned purpose, the second embodiment of the present invention provides a shrimp breeding pond, comprising: a pond body, and a shrimp breeding pond grading and classification filtering device arranged at the water outlet of the pond body, the shrimp breeding pond grading and classification filtering device comprising a fixed part: composed of a lower seat body and an upper column, the outer diameter of the seat body gradually decreases from the bottom to the top; the top of the seat body forms a column upward; the fixed part is composed of a lower seat body and an upper column, the outer diameter of the seat body gradually decreases from the bottom to the top; the top of the seat body forms a column upward; the fixed part is hollow inside to form a cavity for accommodating the movable part; the seat body fixed part forms a plurality of first through holes that connect the external space with the cavity, and the diameter of the first through holes is 0.5~1.5mm; movable part: movable hollow, with open top and bottom surfaces, forming a passage for water flow; arranged in the cavity of the fixed part, the surface of the inner cavity of the fixed part rotates coaxially relative to the fixed part, the movable part forms a second through hole corresponding to the first through hole, and the aperture of the second through hole is not less than the first through hole; the movable part rotates relative to the fixed part, so that the first through hole can be aligned with the second through hole, or the first through hole is closed; the top of the movable part extends out of the top surface of the column to form a collecting element fixed section; the collecting element: connected to the collecting element fixed section, filtering shrimp shells in the water flow, and coaxially rotating relative to the column of the fixed part; the water body driving component: drives the water body to flow toward the fixed part. According to the aquaculture pond of the embodiment of the present invention, the shrimp aquaculture pond grading and classification filtering device has a fixed part, the fixed part is fixed at the water outlet of the aquaculture pond, the water body driving component drives the water flow to converge to the fixed part, and the shrimp feces in the water body are deposited to the base during the process, the movable part rotates relative to the fixed part, so that the through hole of the fixed part is connected to the outside, and the shrimp feces are discharged from the water body from the through hole; the shrimp shells are collected and filtered by the collecting element and then cleaned up.

[0019] In addition, a breeding pond according to the above embodiment of the present invention may also have the following additional technical features:

[0020] Optionally, the water body driving component is an air pump, and the air outlet of the air pump forms a plurality of concentric circles with the water outlet section of the pool body as the center, and the distances between the concentric circles are the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a structure according to an embodiment of the present invention;

[0022] Figure 2 It is a structural exploded perspective view according to one embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of a rotation drive according to an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of the use of a breeding pond according to an embodiment of the present invention;

[0025] Figure 5It is a schematic diagram of the matching structure of the bottom of the fixed part and the movable part according to one embodiment of the present invention;

[0026] Figure 6 A schematic diagram of the arrangement of aeration ports at the bottom of a culture pond according to an embodiment of the present invention;

[0027] Figure 7 It is the volume proportion and cumulative distribution diagram of tailwater particle size;

[0028] Figure 8 This is the concentration curve of total phosphorus, ammonia nitrogen and nitrate nitrogen in water before using this device by flow injection method;

[0029] Fig. 9 This is the concentration curve of total phosphorus, ammonia nitrogen and nitrate nitrogen in water after using this device using the flow injection method.

[0030] Description of labels:

[0031] Fixing part 1 Base body 11 First through hole 111 Column 12

[0032] Groove 131 Ball 132 Sliding groove 133

[0033] Active part 2 Collecting element fixing section 21 Second through hole 22

[0034] Rotating shaft 231 Motor 232 Synchronous belt 233

[0035] Collecting Components 3

[0036] Water body drive component 4. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0038] The shrimp breeding pond of the present invention is provided with a grading and classification filtering device, the fixed part of which is fixed at the water outlet of the breeding pond, and the water driving component drives the water to converge toward the fixed part. During the process, the shrimp feces in the water body are deposited toward the base, and the movable part rotates relative to the fixed part to make the through hole of the fixed part connected with the outside, and the shrimp feces are discharged from the water body through the through hole; the shrimp shells are collected and filtered by the collecting element and then cleaned up collectively.

[0039] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0040] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] The present invention is applicable to shrimp farming. As described in the background technology, shrimps will continuously excrete feces and shed their shells during their growth. In addition, there are feed particles in the water. These solids will dissolve and decompose in the water over time, causing the nitrogen and phosphorus content of the water to increase.

[0042] Based on the above problems, the following research was conducted:

[0043] 1. Particle size distribution characteristics of dissolved feed and shrimp feces: The pore size of the filter device can be determined by analyzing the particle size distribution characteristics;

[0044] 2. Feed nitrogen and phosphorus release rate and time, that is, the optimal time for separation of feed, shrimp shells and feces: Discharging solid waste from the water body before the maximum nitrogen and phosphorus release rate (optimal separation time) can minimize the impact of nitrogen and phosphorus input sources on the water environment, effectively improve the aquaculture water environment, and reduce artificial input and water changes in the aquaculture water.

[0045] The particle size of feces and dissolved feed was analyzed by scanning electron microscopy (SEM, Sigma 500) and particle size analyzer (laser particle size analyzer, Malvern Mastersizer 2000, UK), and the feces particle size was about 50 μm; the particle size volume composition of the particles in the tail water was mainly colloids and fine particles <100 μm, accounting for an average volume proportion of 90.96%, such as Figure 7 shown.

[0046] Based on the above data, the device of the embodiment of the present invention is designed.

[0047] Figures 1 to 5 A grading and classification filtering device for a shrimp breeding pond according to an embodiment of the present invention comprises:

[0048] The fixed part 1 is composed of a seat body 11 at the bottom and a column 12 at the top, wherein the outer diameter of the seat body 11 gradually decreases from the bottom to the top; the top of the seat body 11 forms a column 12 upward; the fixed part 1 is hollow inside to form a cavity for accommodating the movable part 2; the purpose of the embodiment of the present invention is to cooperate with the water driving component 4 to push the solids in the water body to the middle position, and discharge the solids by timed opening after sedimentation; in some embodiments of the present device, the shape of the fixed part 1 is similar to an inverted funnel, and this structure can follow the water flow, so that the solids are just close to the fixed part 1 during the redeposition process, creating conditions for subsequent processes.

[0049] Specifically, the seat body 11 is in a truncated cone shape or a hemispherical shape. The truncated cone shape enables the solid matter to be uniformly deposited on its outer surface.

[0050] After the solids flow and settle in the water, they need to be discharged. To this end, a structure is provided on the seat 11 to enable the solids to be discharged:

[0051] The seat body 11 forms a plurality of first through holes 111 connecting the external space with the cavity, and the diameter of the first through holes 111 is between 0.5 and 1.5 mm. As described above, there is a cavity inside the entire seat body 11. When the device is arranged at the water outlet in the breeding pond, the seat body 11 is equivalent to a part of the pond wall. Therefore, by opening a hole in the seat body 11, the effect of discharging water can be achieved. The first through holes 111 can be opened and closed, and the movable part 2 arranged in the seat body 11 and movable plays the role of opening and closing the through holes.

[0052] In some embodiments, the column 12 is also provided with a plurality of through holes to achieve a better effect of discharging solids.

[0053] The movable part 2 is hollow, with the top and bottom surfaces open, through which water can flow freely. It is rotatably arranged in the cavity of the fixed part 1 and can rotate coaxially relative to the fixed part 1. The movable part 2 forms a second through hole 22 corresponding to the first through hole 111, and the aperture of the second through hole 22 is not less than the first through hole 111; the movable part 2 rotates relative to the fixed part 1 so that the first through hole 111 can be aligned with the second through hole 22, or the first through hole 111 is closed; the top of the movable part 2 extends out of the top surface of the column 12 to form a collecting element fixed section 21; the movable part 2 can realize the following functions: opening and closing the first through hole 111 of the fixed part 1 to realize intermittent discharge of solid matter in the water body, and this opening and closing process is realized by relative rotation;

[0054] The top and bottom surfaces of the movable part 2 are connected, and combined with the internal hollowness, it can be used as an overflow hole;

[0055] The purpose of the diameter of the second through hole 22 being not less than that of the first through hole 111 is to facilitate the discharge of solid matter, but a preferred solution is that the diameter of the second through hole 22 is consistent with the diameter of the first through hole 111 .

[0056] The preferred diameter for both is 1 mm.

[0057] One solution to achieve coaxial rotation of the fixed part 1 and the movable part is: a rotating shaft 231 is set at the top of the movable part, a driven wheel is set on the rotating shaft 231, a motor 232 is fixed on the outside as a driving part, a driving wheel is set at the rotating end of the motor 232, and the driving wheel and the driven wheel are driven by a synchronous belt 233 or a chain. The motor 232 uses a control switch to achieve timed or manual rotation, which can be unidirectional or back and forth. By setting the rotation angle of each rotation, the relative connection or closed state of the first through hole and the second through hole is achieved. In contrast, a circle of grooves 131 can be set at the bottom of the fixed part 1, and balls 132 are placed in the grooves 131. The corresponding bottom of the movable part is also provided with a sliding groove 133. The bottom of the fixed part 1, the balls 132 and the bottom of the movable part are combined to form a structure similar to the ball 132 bearing. Finished bearings can also be used to achieve similar effects.

[0058] By using the above fixing solution, the fixing part 1 and the movable part can only rotate coaxially relative to each other but cannot move in the axial direction.

[0059] Collecting element 3: connected to the collecting element fixed section 21, filters shrimp shells in the water flow, and rotates coaxially relative to the column 12 of the fixed part 1; when the water in the device is moving, the shrimp shells have the slowest sedimentation speed due to their shape, and the speed of shrimp shell generation is also different. Therefore, the collecting element 3 is arranged on the fixed part 1, which can effectively distinguish the shrimp shell collection and other types of solid discharge processes, and realize the classified collection of solids. The purpose of the rotation of the collecting element 3 is to throw away other solids entering the collecting element 3 through its own movement to avoid pollution caused by retention.

[0060] Specifically, the collecting element 3 is connected to the movable part 2 through a plurality of flexible cables. This solution is mainly used for the sake of simple structure. When the collecting element 3 rotates, the cables are curled around the movable part 2 to store energy. When the collecting element 3 rotates in the opposite direction, the curled cables can release the internal energy to increase the rotation speed of the collecting element 3. The cables also facilitate the lifting of the collecting element 3 out of the water, so as to facilitate the dumping of the collected shrimp shells.

[0061] A limiter may also be provided on the column 12 so that when the collecting element 3 moves up and down, it will not be separated from the top of the column 12 due to rotation upwards, and when it moves downwards, it will not over-tighten the cable and reduce the life of the cable.

[0062] In some embodiments, the collecting element 3 is a round bowl with an open top, and the sides and bottom of the round bowl are detachable filter screens. This structure is simple and easy to maintain.

[0063] Water driving component 4: drives the water to flow toward the fixed part 1. The water driving component 4 can be a combination of an air pump and an air charging head, or other propellers or similar structures for stirring the water.

[0064] A shrimp breeding pond comprises: a pond body, and a shrimp breeding pond grading and classification filtering device arranged at the water outlet of the pond body. The specific structure of the shrimp breeding pond grading and classification filtering device has been described above and will not be repeated here.

[0065] In some embodiments, the water driving component 4 is an air pump, and the air outlet of the air pump forms a plurality of concentric circles with the water outlet section of the pool as the center. The spacing between the concentric circles is the same. The arrangement can refer to Figure 6 .

[0066] A shrimp culture pond body based on the above embodiment is aerated by arranging aeration ports (i.e., air outlets) as shown in the figure. Taking a culture pond with a diameter of about 130 cm, a lower diameter of about 110 cm, and a depth of about 70 cm as an example, the bottom aeration ports are arranged in concentric circles, and the concentric circle band spacing is set to 50 cm. The average aeration volume is 75 L / min. By changing the size of the aeration aperture, the aeration volume of the concentric circle band increases from the inside to the outside in a gradient manner; according to such an aeration method, solid matter in the water body can be gathered in the middle, which is conducive to the separation of solids such as shrimp shells, large particles and small particles of feed. Generally speaking, large particles of feed have a high specific gravity and will first settle on the periphery of the shrimp culture pond classification and filtering device, and then recirculate with the water flow or be eaten by shrimps; while shrimp shells have a low specific gravity and are easy to enter the collecting element 3 with the water flow caused by the upward and lateral aeration, so as to achieve the separation of shrimp shells and large particles of feed, and small particles of feed are settled in the inner circle of the filtering device.

[0067] In this scheme, the shrimp shell collection net uses an 18-mesh screen.

[0068] Using the embodiment of the present invention, the following experimental process was performed to test the effect:

[0069] First, to ensure that the designed experiment can achieve the expected results, the sampling time interval is determined to be 30 minutes through preliminary experiments. According to local conditions, two aquaculture ponds with a volume of 700L are prepared for control experiments. The experimental process ensures that the water quality, water volume and other conditions are the same.

[0070] Referring to the maximum feeding ratio of adult shrimp 1:1.25, 15g of feed was added to the experimental group, and no feed was added to the control group. At the same time, aeration and temperature control were performed on both groups to ensure that the DO of the water body was ≥4mg / L and the water temperature was between 16℃ and 30℃. According to the time rule of breeding and feeding, the total duration of the experiment was set to 4h, and the control water sample was taken at 0 time. Samples were taken every 30min, and 50mL was sampled each time. It was filtered with a 0.45μm filter membrane, and the total phosphorus, ammonia nitrogen, and nitrate nitrogen of the water quality were determined by flow injection method.

[0071] Comparison of nitrogen and phosphorus concentrations in the pool before and after using the embodiment of the present invention:

[0072] The pre-processed data were used to fit the concentration curves of total phosphorus, ammonia nitrogen, and nitrate nitrogen, as shown in Figure 8 The total phosphorus, ammonia nitrogen, and nitrate nitrogen values ​​are the differences between the experimental group and the control group. The peak values ​​of nitrogen and phosphorus release are obtained according to the curve graph, and the optimal time point T1 for the separation and discharge of solid waste in the embodiment of the present invention can be determined. The total phosphorus, ammonia nitrogen, and nitrate nitrogen concentration curves are analyzed, and the waste discharge time point T1 = 120 min is determined in combination with the shrimp foraging time.

[0073] 15g of feed was added to the experimental group, the temperature and aeration volume of the experimental group and the control group were kept consistent, the culture pond was operated at time T1, and the collected solid waste was discharged from the culture pond by the embodiment of the present invention. The sampling times were 4 times, and the samples were taken at 0min, 90min, 120min, and 150min, respectively, with 50mL sampled each time, and filtered with a 0.45μm filter membrane; the total phosphorus, ammonia nitrogen, and nitrate nitrogen in the water were determined by flow injection method.

[0074] Use post-processing data and fit the time and total phosphorus, ammonia nitrogen, and nitrate nitrogen concentration curves. The total phosphorus, ammonia nitrogen, and nitrate nitrogen values ​​are the difference between the experimental group and the control group, and the data are analyzed to draw conclusions. Fig. 9 : As shown in the concentration curves of total phosphorus, ammonia nitrogen and nitrate nitrogen, running the embodiment of the present invention at time T1 reduces the feed in the aquaculture pond, thereby reducing the input of nitrogen and phosphorus in the water body; experiments show that 30 minutes after the device is running, the total phosphorus, ammonia nitrogen and nitrate nitrogen in the aquaculture water body are reduced by 67.42%, 75.54% and 16.66% respectively under the action of microorganisms; therefore, the embodiment of the present invention can solve the negative impact of the continuous input of nitrogen and phosphorus in the feed on the aquaculture water environment.

[0075] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0076] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0078] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A grading and classification filtering device, characterized in that: include Fixed part: It is composed of a lower seat body and an upper column body. The outer diameter of the seat body gradually decreases from the lower part to the upper part. The top of the seat body forms a column upward. The fixed part is hollow inside to form a cavity for accommodating the movable part. The seat body of the fixing part is formed with a plurality of first through holes, and the diameter of the first through holes is between 0.5 and 1.5 mm; The movable part is hollow, with the top and bottom surfaces open to form a passage for water flow; it is arranged in the cavity of the fixed part and can rotate coaxially relative to the fixed part, and the movable part forms a second through hole corresponding to the first through hole, and the aperture of the second through hole is not less than that of the first through hole; the movable part rotates relative to the fixed part so that the first through hole can be aligned with the second through hole, or the first through hole is closed; the top end of the movable part extends out of the top surface of the column to form a fixed section of the collecting element; Collecting element: connected to the fixed section of the collecting element, filtering shrimp shells in the water flow, and rotating coaxially relative to the column of the fixed part; Water driving component: drives the water to flow towards the fixed part.

2. The grading and classification filtering device according to claim 1, characterized in that: The seat body is truncated cone or hemispherical.

3. The grading and classification filtering device according to claim 1, characterized in that: The column is also provided with a plurality of through holes.

4. The grading and classification filtering device according to claim 1, characterized in that: The collecting element is connected to the movable part via a plurality of flexible cables.

5. The grading and classification filtering device according to claim 1, characterized in that: The collecting element is a round basin with an open top, and the sides and bottom of the round basin are filter screens.

6. A shrimp culture pond, characterized in that: The invention comprises a pool body and a grading and classification filtering device arranged at the water outlet of the pool body; the grading and classification filtering device comprises a fixed part: composed of a lower seat body and an upper column body, the outer diameter of the seat body gradually decreases from the lower part to the upper part; the top of the seat body forms a column upward; the fixed part is hollow inside to form a cavity for accommodating the movable part; the fixed part of the seat body forms a plurality of first through holes connecting the external space with the cavity, and the diameter of the first through holes is between 0.5 and 1.5 mm; the movable part is hollow and has open top and bottom surfaces to form a passage for water flow to pass through; In the cavity of the fixed part, the surface of the inner cavity of the fixed part rotates coaxially relative to the fixed part, and the movable part forms a second through hole corresponding to the first through hole, and the aperture of the second through hole is not less than that of the first through hole; the movable part rotates relative to the fixed part, so that the first through hole can be aligned with the second through hole, or the first through hole is closed; the top of the movable part extends out of the top surface of the column to form a fixed section of the collecting element; the collecting element: connected to the fixed section of the collecting element, filters the shrimp shells in the water flow, and rotates coaxially relative to the column of the fixed part; the water driving component: drives the water to flow toward the fixed part.

7. The shrimp culture pond according to claim 6, characterized in that: The water body driving component is an air pump, and the air outlet of the air pump forms a plurality of concentric circles with the water outlet section of the pool body as the center, and the distances between the concentric circles are the same.

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