A layered shrimp and crab breeding device and system

Abstract

The application discloses a layered shrimp and crab breeding device and system, which comprises a sleeve type bait feeding mechanism and a plurality of breeding units (4) for breeding shrimps and crabs. The sleeve type bait feeding mechanism is formed by sleeving a sleeve (1) and an inner tube (6). The breeding unit is a square box-shaped container without a cover, and the side surface and the bottom surface of the breeding unit are grid surfaces or grating surfaces. The bottom surface of each breeding unit is provided with a through hole (41) for penetrating the sleeve. The plurality of breeding units are sleeved on the sleeve in a stacked manner. A plurality of windows (11) are equidistantly arranged on the sleeve along the axial direction of the sleeve. A plurality of bait grooves (61) are arranged on the inner tube along the axial direction of the inner tube and correspond to the plurality of windows. The sleeve and the inner tube are arranged in a vertical direction. Under the action of an external force, the inner tube can rotate in the sleeve. When the window is aligned with the bait groove, the bait groove is exposed in the breeding unit, so that the shrimps and crabs can obtain the bait in the bait groove, and the feeding is completed. The layered shrimp and crab breeding device and system have novel structure, convenient bait feeding and operation, and can realize high-density and precise feeding breeding.

Description

Technical Field

[0001] This invention relates to a tiered shrimp and crab farming device and system. Background Technology

[0002] The current mainstream method of shrimp and crab farming is pond farming. This method has the disadvantages of making it difficult to control diseases and regulate temperature. Due to uneven feeding, the size of farmed individuals is not uniform. At the same time, most shrimp and crabs attack and cannibalize each other, resulting in low survival rate and sharp reduction in yield.

[0003] The facility-based farming model also has this problem. For example, Chinese invention with publication number CN 212325145 U discloses a multi-layered indoor crayfish farming box, which uses independent farming boxes stacked together. Each farming box has an independent water inlet and drainage device. Although this method can increase the farming density, multiple crayfish need to be raised in one farming box, which can easily lead to fighting and attacking each other (especially during molting), which can greatly affect the yield.

[0004] Therefore, it is necessary to design a new shrimp and crab farming equipment. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a layered shrimp and crab farming device and system. The layered shrimp and crab farming device has a simple structure, is easy to implement, and allows for precise and convenient feeding.

[0006] The technical solution of the invention is as follows:

[0007] A tiered shrimp and crab farming device includes a sleeve-type feeding mechanism and multiple farming units for raising shrimp and crabs.

[0008] The sleeve-type feeding mechanism consists of a sleeve and an inner tube fitted together.

[0009] The breeding unit is an open-top square box container, with the sides and bottom of the breeding unit being mesh or grid surfaces; each breeding unit has a through hole on the bottom surface for inserting a sleeve.

[0010] Multiple aquaculture units are stacked on a casing;

[0011] The outer sleeve has multiple windows spaced evenly along its axial direction, and the inner tube has multiple feed troughs corresponding to these windows along its axial direction. Both the outer sleeve and the inner tube are vertically oriented. Under external force, the inner tube can rotate within the outer sleeve. When rotated until the window aligns with the feed trough, the feed trough is exposed within the rearing unit, allowing shrimp and crabs to access the feed and complete the feeding process.

[0012] It also includes a base, a cover plate, and vertical supports. The supports are used to support one side of multiple breeding units, increasing the stability of the breeding units.

[0013] Both the sleeve and the support rod are fixed to the base;

[0014] The cover plate is set on top of the support rod and above the breeding unit (to cover and press down the breeding unit to stabilize the entire device).

[0015] The support rod is equipped with pin holes and matching pins. After the cover plate presses down on multiple breeding units, it is then locked with the pins, making the entire device more stable.

[0016] The sleeve-type feeding mechanism and the breeding unit are in two sets, and are arranged symmetrically with respect to the support rods.

[0017] Multiple inner tube openings are provided at equal intervals along the axial direction of the inner tube, and multiple partitions are provided at equal intervals along the axial direction of the inner tube. Each inner tube opening and partition forms a feed trough.

[0018] A shrimp and crab farming system includes a tiered shrimp and crab farming device, an aquaculture tank, and a wastewater treatment device.

[0019] A multi-component, tiered shrimp and crab farming device is placed in an aquaculture tank;

[0020] The wastewater treatment device is used to filter and treat the wastewater discharged from aquaculture tanks.

[0021] The aquaculture tank is an all-weather, tidal canvas aquaculture tank, comprising the canvas tank and a frame for supporting it. The frame is square, formed by four uprights, four top beams, and four bottom beams joined together. Multiple vertical and horizontal reinforcing ribs are fixed to the frame, and these ribs are connected by bolts. Each side of the frame is lined with a color steel insulation panel. The canvas tank contains horizontally arranged inclined troughs. Each inclined trough contains multiple parallel and equally spaced inclined plates. There is a gap of height h (20-30cm) between the inclined trough and the bottom of the canvas tank, forming the first sludge collection zone. Aeration pipes are installed on the inclined trough, and these pipes are connected to a blower.

[0022] The bottom of the canvas aquaculture box is equipped with a first sewage outlet; the first sewage outlet is connected to a sewage pipe with a drain valve; the all-weather tidal canvas aquaculture box is also equipped with a water inlet pipe, which is equipped with a water inlet valve.

[0023] The wastewater treatment device is an aquaculture wastewater treatment device based on vertical flow sand filter barrels, including an outer barrel, an inlet pipe, a central pipe, and multiple sand filter barrels; the inlet pipe, central pipe, and multiple sand filter barrels are all located inside the outer barrel; sand filter bags are installed inside the sand filter barrels; the inner cavity of the outer barrel is divided into an upper overflow area, a middle filtration area, and a bottom secondary sludge collection area; the central pipe is coaxially arranged with the outer barrel, fixed inside the outer barrel, and located in the filtration area; the inlet pipe consists of a horizontal section and a vertical section connected together; the outer end of the horizontal section extends from the side wall of the outer barrel as the inlet end; the vertical section is located inside the central pipe, and the inlet pipe and the central pipe are coaxial; the bottom of the outer barrel has a drain outlet; Multiple sand filter barrels are supported by a frame and installed inside an outer barrel; the sand filter barrels are located in the filtration zone; the walls of the sand filter barrels are provided with water permeable holes; the bottom of the sand filter barrels is higher than the bottom of the central tube; horizontally arranged baffles are provided inside the outer barrel; multiple sand filter barrels are vertically inserted into the through holes on the baffles; an overflow pipe is provided on the wall of the outer barrel; the overflow pipe is located below the top of the sand filter barrels and above the baffles.

[0024] Beneficial effects:

[0025] The tiered shrimp and crab farming device and system of the present invention has the following technical advantages:

[0026] Individual breeding units are used, with each breeding unit housing one shrimp or one crab. This avoids mutual attack, ensures uniform feeding, and improves the growth rate and survival rate of shrimp and crabs.

[0027] It uses a unique feeding device, making feeding accurate and convenient.

[0028] The method of using a combination of outer and inner tubes for baiting ensures precise baiting and high bait utilization.

[0029] Layered modular farming saves space, allows for high stocking density, and yields considerable economic benefits.

[0030] With the casing as the axis, each breeding unit can be rotated or lifted to open, which facilitates the release and collection of crabs, reduces labor intensity, can be operated by a single person, and is suitable for breeding of different scales.

[0031] In summary, this tiered shrimp and crab farming device adopts a completely new structure and concept, with precise and convenient feeding, simple operation, and can achieve high density and high survival rate in shrimp and crab farming, resulting in good economic benefits and making it suitable for widespread implementation.

[0032] Furthermore, the aquaculture system integrates a wastewater treatment device based on a sand filter, which is beneficial for achieving recirculating aquaculture or for ensuring the wastewater meets discharge standards. Due to its low cost, this type of aquaculture tank allows for the high-density cultivation of high-value aquatic species such as shrimp and crabs, creating more significant economic benefits. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the frame of an all-weather tidal canvas aquaculture tank;

[0034] Figure 2 This is a structural diagram of the all-weather tidal canvas aquaculture box, including the frame lined with color steel insulation panels and the canvas aquaculture box itself.

[0035] Figure 3 This is a schematic diagram of the overall structure of an all-weather tidal canvas aquaculture tank;

[0036] Figure 4 It is a 3D view of the inclined groove perforated plate;

[0037] Figure 5 This is a schematic diagram of the longitudinal section of the inclined groove perforator;

[0038] Figure 6 A three-dimensional view of another type of inclined slot perforated plate;

[0039] Figure 7 This is a schematic diagram (front view) of the overall structure of an aquaculture wastewater treatment device based on a vertical flow sand filter.

[0040] Figure 8 This is a schematic diagram (top view) of the overall structure of an aquaculture wastewater treatment device based on a vertical flow sand filter.

[0041] Figure 9 This is a schematic diagram of the wastewater treatment process of a wastewater treatment device based on a vertical flow sand filter.

[0042] Figure 10 A 3D view of a sand filter barrel;

[0043] Figure 11 This is a schematic diagram of the aquaculture unit structure;

[0044] Figure 12 This is a schematic diagram of the casing and inner tube.

[0045] Figure 13 This is a schematic diagram (top view) of a double-row aquaculture device.

[0046] Figure 14 This is a schematic diagram (front view) of a double-row aquaculture device.

[0047] Figure 15 This is a cross-sectional view of the inner tube.

[0048] Label Explanation:

[0049] 1-Frame, 2-Vertical stiffener, 3-Horizontal stiffener, 4-Bolt, 5-Sensor, 6-Card slot, 7-First sewage collection area, 8-Aeration pipe, 9-First sewage outlet, 10-Sewage pipe, 11-Inclined trough plate, 12-Canvas breeding box, 13-Color steel insulation board, 14-Protrusion;

[0050] 101-Vertical section of inlet pipe, 102-Handle, 103-Sand filter bucket, 104-Baffle plate, 105-Brush column, 106-Sand filter bag, 107-Filtration zone, 108-Frame plate, 109-Central pipe, 110-Inclined plate filter, 112-Conical bottom, 113-Second drain outlet, 114-Horizontal section of inlet pipe, 115-Outer bucket, 116-Overflow pipe, 117-Overflow zone, 118-Isolation cylinder, 119-Ring body.

[0051] 201-Sleeve, 211-Window, 202-Cover plate, 203-Support rod, 204-Aquaculture unit, 205-Base, 206-Inner tube, 261-Feeding trough, 262-Window opening in inner tube, 263-Partition plate, 207-Pin. Detailed Implementation

[0052] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0053] Example 1: As Figure 11-15 A layered shrimp and crab farming device, with a basic frame consisting of a base, support rods and a cover plate;

[0054] It also includes a sleeve-type feeding mechanism and multiple breeding units 204 for raising shrimp and crabs; the sleeve-type feeding mechanism is composed of a sleeve 201 and an inner tube 206 fitted together; the breeding unit is an open-top square box-shaped container, and the sides and bottom of the breeding unit are grid surfaces or grille surfaces; each breeding unit has a through hole 241 on the bottom surface for inserting the sleeve; multiple breeding units are stacked on the sleeve in a layered manner;

[0055] The sleeve has multiple windows 211 evenly spaced along its axial direction, and the inner tube has multiple feed troughs 261 corresponding to the multiple windows along its axial direction; both the sleeve and the inner tube are vertically oriented; under the action of external force, the inner tube can rotate inside the sleeve.

[0056] Both the sleeve and the support rod are fixed to the base.

[0057] The cover plate is set on top of the support rod and above the breeding unit (to cover and press down the breeding unit to stabilize the entire device).

[0058] The sleeve-type feeding mechanism and the breeding unit are in two sets, and are arranged symmetrically on the left and right sides relative to the support rod.

[0059] Feeding instructions: Before feeding, place the inner tube horizontally and put the feed into the feed trough. Then, stand the inner tube upright and insert it into the sleeve. Rotate the inner tube until the window is aligned with the feed trough, exposing the feed trough within the rearing unit, making it easy for shrimp and crabs to access the feed. To feed again, remove the inner tube and repeat the above steps.

[0060] Specifically, the support rod is equipped with pin holes and matching pins 207. After the cover plate presses down on multiple breeding units, it is then locked with the pins, making the entire device more stable.

[0061] The sleeve-type feeding mechanism and the breeding unit are in two sets, and are arranged symmetrically with respect to the support rods. This ensures good balance and saves space, thereby improving the productivity per unit space.

[0062] like Figure 15 The inner tube has multiple inner tube openings 262 at equal intervals along the axial direction of the inner tube, and multiple partitions 263 at equal intervals along the axial direction of the inner tube. Each inner tube opening and partition forms a feed trough.

[0063] A shrimp and crab farming system includes a tiered shrimp and crab farming device, an aquaculture tank, and a wastewater treatment device.

[0064] A multi-component, tiered shrimp and crab farming device is placed in an aquaculture tank;

[0065] The wastewater treatment device is used to filter and treat the wastewater discharged from aquaculture tanks.

[0066] Wastewater treatment devices such as Figure 7-10 It is an aquaculture wastewater treatment device based on vertical flow sand filter barrels, including an outer barrel 115, an inlet pipe, a central pipe 109 and 6 sand filter barrels 103; the inlet pipe, the central pipe and the multiple sand filter barrels are all installed inside the outer barrel; multiple sand filter bags 106 are installed inside the sand filter barrels;

[0067] The inner cavity of the outer tub is divided into an upper overflow area 117, a middle filtration area 107, and a bottom second dirt collection area 111;

[0068] The central tube is coaxially arranged with the outer barrel and is fixed inside the outer barrel (specifically supported by the frame plate and the inclined plate filter) and located in the filtration area; the water inlet pipe is composed of a horizontal section 114 and a vertical section 101 connected together; the outer end of the horizontal section of the water inlet pipe extends from the side wall of the outer barrel as the water inlet end; the vertical section of the water inlet pipe is arranged inside the central tube and the water inlet pipe and the central tube are coaxial.

[0069] The bottom of the outer tub has a second drain outlet 113; the second drain outlet can be connected to a drain pipe with a valve;

[0070] Six sand filter barrels are supported by a frame and installed inside the outer barrel; the sand filter barrels are located in the filtration zone; the walls of the sand filter barrels are made of mesh plates to facilitate the entry of wastewater from the filtration zone into the sand filter barrels; the bottom of the sand filter barrels is higher than the bottom of the central pipe;

[0071] The outer barrel is equipped with horizontally arranged baffles 104; multiple sand filter barrels are inserted vertically into the through holes on the baffles; the baffles serve to isolate the water in the filtration zone from entering the overflow zone, and the water can only enter the overflow zone after passing through the sand filter.

[0072] An overflow pipe 116 is provided on the wall of the outer barrel; the overflow pipe is located below the upper end of the sand filter barrel and above the partition.

[0073] The outer barrel is equipped with a support plate 108 for supporting the sand filter barrel. The outer barrel is also equipped with an inclined plate filter 110 to prevent impurities from flowing back from the dirt collection area into the filtration area.

[0074] The six sand filter barrels are evenly distributed along the circumference of the outer barrel.

[0075] The sand filter bucket is equipped with a handle 102. This makes it easy for operators to lift and insert the sand filter bucket and perform regular cleaning and maintenance.

[0076] The sand filter barrel is equipped with brush columns 105, which can further enhance the filtration effect.

[0077] An isolation cylinder 118 with water-permeable holes is provided between the brush column and the sand filter bag to isolate the sand filter bag and the brush column and prevent the sand filter bag from squeezing the brush column.

[0078] The bottom of the sludge collection area is a tapered cone bottom 112.

[0079] The top of the sand filter has a ring 119 for hanging the sand filter in the through hole, so that the bottom and top of the sand filter can bear the force, making the structure more robust.

[0080] A wastewater treatment method employs the aforementioned wastewater treatment device based on a vertical flow sand filter.

[0081] The processing procedure is as follows:

[0082] Wastewater enters the central pipe through the inlet pipe and then enters the filtration zone, where it is filtered by sand filters. The clear liquid is discharged through the overflow pipe, while impurities settle in the collection zone.

[0083] like Figure 9 Detailed steps explained:

[0084] S1: Wastewater enters the main tank through the inlet of the inlet pipe;

[0085] S2: Sewage flows upward through the vertical section of the inlet pipe;

[0086] S3: Sewage enters the central pipe through the inlet at the top of the vertical section of the inlet pipe;

[0087] S4: Wastewater flows downwards into the sewage collection area;

[0088] S5: Wastewater enters the filtration zone via an inclined plate filter;

[0089] S6: Wastewater enters the sand filter tank;

[0090] S7: Wastewater enters the brush column from the sand filter and then overflows from the top of the brush column;

[0091] S8: The clear liquid is discharged from the overflow port.

[0092] Aquaculture wastewater treatment equipment has the following technical advantages:

[0093] Quartz sand filtration can effectively remove fine particles and suspended solids.

[0094] It uses multiple sand filter barrels, resulting in a large effective filtration area and good filtration effect.

[0095] The sand filter can be easily inserted and removed, and is easy to clean and maintain.

[0096] The inclined plate filter and conical bottom provide excellent dirt collection and effectively prevent backflow of impurities, thus improving the overall vertical sedimentation process.

[0097] In summary, this aquaculture wastewater treatment device based on a vertical flow sand filter is space-saving, easy to implement, and low-cost, effectively removing large particles, microparticles, and suspended solids. Its simple and practical structure, excellent sedimentation and filtration effects, and ease of cleaning make it suitable for widespread implementation.

[0098] The breeding box is a simple breeding box, such as Figure 1-5 As shown, this is an all-weather tidal canvas aquaculture tank, including a canvas aquaculture tank 12 and a frame 1 for supporting the canvas aquaculture tank; the frame is a square frame, which is formed by connecting four uprights, four top crossbeams and four bottom crossbeams.

[0099] Multiple vertical reinforcing ribs 2 and multiple horizontal reinforcing ribs 3 are fixed on the frame; the vertical reinforcing ribs and the horizontal reinforcing ribs are fixedly connected by bolts 4;

[0100] Each facade of the frame is lined with color steel insulation panels 13;

[0101] The canvas breeding box is equipped with a horizontally arranged inclined trough strainer 11; the inclined trough strainer is equipped with multiple parallel inclined plates arranged at equal intervals; there is a gap of height h between the inclined trough strainer and the bottom of the canvas breeding box, where h is 20cm; a first sludge collection area 7 is formed between the inclined trough strainer and the bottom of the canvas breeding box.

[0102] Aeration pipes 8 are installed on the inclined trough perforated plate; the aeration pipes are connected to the blower; the inclined trough perforated plate can be used as follows: Figure 6 As shown, four support legs are installed at the bottom.

[0103] The bottom of the canvas breeding box is equipped with a first sewage outlet 9; the first sewage outlet is connected to a sewage pipe 10 with a drain valve;

[0104] The all-weather tidal canvas aquaculture tank is also equipped with an inlet pipe with an inlet valve.

[0105] Each of the four uprights of the frame has a protrusion 14 (or two crossbeams), which support the inclined slot perforated plate.

[0106] Color steel insulation panels include an inner lining of color steel panels and an outer insulation layer, such as foam boards; the bottom of canvas aquaculture boxes is equipped with an insulation film.

[0107] The canvas aquaculture tank is equipped with a sensor group, which includes a water temperature sensor, a water level sensor, a dissolved oxygen sensor, and a pH sensor.

[0108] Several pairs of slots 6 are provided on the two opposing top crossbeams for inserting grating plates. After inserting the grating plates, different breeds or sizes of animals can be raised in separate areas.

[0109] It also includes a controller; sensors are connected to the controller; the fan, inlet valve and drain valve are all controlled by the controller.

[0110] Tidal canvas aquaculture tanks have the following technical advantages:

[0111] It has heat preservation function and is suitable for all-weather breeding;

[0112] The color steel insulation board has an insulation layer, and the bottom of the canvas breeding box is equipped with an insulation film. In winter, it can be heated by ground source heat pumps and heaters, and in summer, it can be cooled by adding groundwater. This effectively ensures a constant water temperature, saves energy, and ensures that fish can grow rapidly at the most suitable water temperature all year round.

[0113] The sludge collection mechanism based on the inclined groove plate has a good sludge collection effect.

[0114] The inclined trough strainer plate functions similarly to an inclined tube sedimentation system. Once the residue enters the first collection zone, it is not easily stirred up. Moreover, the aeration pipe is located above the inclined trough strainer plate, which can also effectively prevent impurities from being stirred up. Thus, the adoption of this new mechanism can effectively improve the collection effect.

[0115] It adopts tidal drainage and water replenishment, with a high degree of automation, increases water exchange, realizes timely sewage discharge, keeps the water in the breeding tank clean, and promotes rapid fish growth.

[0116] By adopting a partitioned farming method, which uses partitions to separate different species, multi-species farming can be carried out in different areas, and comparative experiments on farming the same species or multiple species can also be conducted.

[0117] It has a simple structure, low cost, and is easy to promote and implement.

[0118] These aquaculture boxes are easy to transport, install, and disassemble. They have excellent heat preservation and waste collection capabilities, and can be divided into different aquaculture areas. Through tidal automatic water inlet and outlet, they can increase water exchange and effectively remove uneaten feed and feces, enabling separable, all-weather, high-density aquaculture.

[0119] In summary, this all-weather tidal canvas aquaculture tank is feature-rich, easy to promote and implement, suitable for high-density aquaculture, and has significant economic benefits.

[0120] Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention shall be included within the scope of protection of this invention.

Claims

1. A shrimp and crab farming system characterized by, The application relates to a layered shrimp and crab breeding device, an aquaculture box and a tail water treatment device. The layered shrimp and crab breeding device is arranged in the aquaculture box. The tail water treatment device is used for filtering and treating tail water discharged from the aquaculture box. The layered shrimp and crab breeding device comprises a sleeve type bait feeding mechanism and a plurality of shrimp and crab breeding units (204); the sleeve type bait feeding mechanism is formed by sleeving a sleeve (201) and an inner tube (206); the breeding unit is a coverless square box container, the side surface and the bottom surface of the breeding unit are grid surfaces or grating surfaces; the bottom surface of each breeding unit is provided with a through hole (241) for penetrating the sleeve; the plurality of breeding units are sleeved on the sleeve in a stacked mode; a plurality of windows (211) are arranged on the sleeve at equal intervals along the axial direction of the sleeve; a plurality of bait grooves (261) are arranged on the inner tube at corresponding positions of the plurality of windows along the axial direction of the inner tube; the sleeve and the inner tube are arranged in vertical directions; under the action of an external force, the inner tube can rotate in the sleeve. The aquaculture box is a full-weather tidal canvas aquaculture box, which comprises a canvas aquaculture box (12) and a frame (1) for supporting the canvas aquaculture box; the frame is a square frame formed by the butt joint of four vertical columns, four top cross beams and four bottom cross beams; a plurality of vertical reinforcing ribs (2) and a plurality of horizontal reinforcing ribs (3) are fixed on the frame; the vertical reinforcing ribs and the horizontal reinforcing ribs are fixedly connected through bolts (4); each vertical surface of the frame is lined with a color steel heat preservation plate (13); the canvas aquaculture box is provided with a horizontally arranged chute leakage plate (11); a plurality of inclined plates are arranged in the chute leakage plate. The tail water treatment device is a breeding tail water treatment device based on a vertical flow sand filter barrel, which comprises an outer barrel (115), a water inlet pipe, a central pipe and a plurality of sand filter barrels (103); the water inlet pipe, the central pipe and the plurality of sand filter barrels are arranged in the outer barrel; a sand filter bag (106) is arranged in each sand filter barrel; the inner cavity of the outer barrel is divided into an overflow area (117) at the upper portion, a filtering area (107) at the middle portion and a second sewage collecting area (111) at the bottom portion; the central pipe is coaxially arranged with the outer barrel and is fixed in the outer barrel and located in the filtering area; the water inlet pipe is formed by the butt joint of a water inlet pipe horizontal section (114) and a water inlet pipe vertical section (101); the outer end of the water inlet pipe horizontal section extends from the side wall of the outer barrel as a water inlet end; the water inlet pipe vertical section is arranged in the central pipe and shares the coaxial line with the central pipe; the bottom portion of the outer barrel is provided with a second sewage outlet (113); the plurality of sand filter barrels are supported by frame plates and arranged in the outer barrel; the sand filter barrels are located in the filtering area; the barrel wall of each sand filter barrel is provided with a water permeable hole; the bottom portion of each sand filter barrel is higher than the bottom portion of the central pipe; a horizontal partition plate (104) is arranged in the outer barrel; the plurality of sand filter barrels are inserted into the through holes in the partition plate in the vertical direction; the outer barrel is provided with an overflow pipe (116) on the barrel wall; the position of the overflow pipe is lower than the upper end of the sand filter barrel and the overflow pipe is located above the partition plate.

2. The shrimp-crab farming system according to claim 1, characterized in that, The gap between the chute leakage plate and the bottom of the canvas aquaculture box has a height h, h is 20-30 cm; the chute leakage plate and the bottom of the canvas aquaculture box form a first sewage collecting area (7); an aeration pipe (8) is arranged on the chute leakage plate; the aeration pipe is connected with a fan. The bottom of the canvas culture box is provided with a first sewage outlet (9); the first sewage outlet is connected with a sewage pipe (10) provided with a drain valve; the all-weather tidal canvas aquatic product culture box is further provided with a water inlet pipe, and the water inlet pipe is provided with a water inlet valve.

3. The shrimp-crab farming system according to claim 1, characterized in that, The layered shrimp and crab culture device further comprises a base (205), a cover plate (202), and vertical support rods (203); The sleeve and the support rod are both fixed on the base. The cover plate is arranged on the top of the support rod and above the culture unit.

4. The shrimp-crab farming system according to claim 3, characterized in that, The support rod is provided with a pin hole and a bolt (207) matched with the pin hole.

5. The shrimp-crab farming system of claim 1, wherein The sleeve type bait feeding mechanism and the culture unit are two groups and are symmetrically arranged relative to the support rod.

6. A shrimp-crab farming system according to any one of claims 3-5, characterized in that A plurality of inner tube windows (262) are arranged on the inner tube at equal intervals along the axial direction of the inner tube, and a plurality of partitions (263) are arranged in the inner tube at equal intervals along the axial direction of the inner tube, each inner tube window and the partition form a bait groove.

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