Multi-layer spiral crab breeding device

Abstract

The invention discloses a multilayer spiral crab breeding device, and relates to the technical field of aquaculture. A multi-layer spiral crab breeding device comprises a water tank, the water tank is communicated with a water inlet connector, the top end of the water tank is communicated with a hollow stand column, the hollow stand column is fixedly connected with installation rings distributed at equal intervals, the installation rings are fixedly connected with breeding boxes, the breeding boxes are spirally distributed, and the interiors of the breeding boxes are fixedly connected with filter screens. When water flows in the water inlet pipe of the spiral structure and the spraying frame, the oxygen content of water flow can be increased, then the oxygen content in the breeding box is increased, the crab activity area and excrement can be distinguished through the filter screen, the excrement is precipitated at the water bottom, the water quality of the crab activity area is ensured, and the water in the breeding box can be discharged through the water outlet pipe and the connecting pipe. During drainage, the scraper moves up and down, the cleaning brush rotates forwards and backwards, the interior of the breeding box and the filter screen can be cleaned, impurities in water and water bottom excretion are discharged out of the breeding box along water flow, and therefore the breeding environment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aquaculture, and in particular to a multi-layer spiral crab breeding device. Background Art

[0002] As market demand grows, crab farming faces the dual challenge of increasing production and quality. Although traditional farming methods such as pond farming and cage farming can meet certain production needs, they have disadvantages such as large land area, difficult management, and poor environmental control capabilities. In order to improve farming density and management efficiency, multi-layer three-dimensional farming technology came into being.

[0003] However, the existing multi-layer breeding boxes are mostly stacked vertically and horizontally. Although this design can increase the breeding density to a certain extent, it has obvious shortcomings. First, the traditional multi-layer breeding boxes are inconvenient to clean: because the breeding boxes are usually stacked tightly, it is difficult for staff to enter the box for thorough cleaning. During the breeding process, crab excrement and other impurities are easily attached to the inner wall of the breeding box, which not only affects the sanitation of the breeding environment, but may also cause water quality deterioration and affect the growth and health of crabs. Secondly, the water flow design of traditional multi-layer breeding boxes is unreasonable: due to the compact layout of the box, the water flow is unevenly distributed in the box, resulting in insufficient oxygen supply, affecting the breathing and metabolism of crabs. In addition, the uneven distribution of water flow will also cause the accumulation of pollutants in local areas, further deteriorating the water quality.

[0004] In order to solve the above problems, we propose a multi-layer spiral crab breeding device. This crab breeding device uses a spirally distributed breeding box design, which not only increases the oxygen content of the water flow, but also can clean the inside of the breeding box, thereby improving the breeding environment and improving the water quality. Summary of the invention

[0005] In order to overcome the shortcomings of existing multi-layer breeding boxes that mostly adopt vertical and horizontal stacking structures, are inconvenient to clean the inside of the breeding boxes, have a compact box layout, and have insufficient oxygen supply, the present invention provides a multi-layer spiral crab breeding device. The crab breeding device uses a spirally distributed breeding box design to not only increase the oxygen content of the water flow, but also can clean the inside of the breeding box, thereby improving the breeding environment and improving the water quality.

[0006] Technical solution: A multi-layer spiral crab breeding device comprises a water tank, a water inlet interface is connected to the water tank, a hollow column is connected to the top of the water tank, equidistantly distributed mounting rings are fixedly connected to the hollow column, a breeding box is fixedly connected to the mounting ring, the breeding box is spirally distributed, a filter is fixedly connected in the breeding box, an opening and closing plate is rotatably connected to the side of the breeding box away from the hollow column, a water inlet pipe is connected to the top of the hollow column, an equidistantly distributed spray rack is connected to the water inlet pipe, the spray rack extends into an adjacent breeding box, a water pump is fixedly connected in the water tank, the water pump is connected to the bottom end of the hollow column, a water outlet pipe is connected between the bottom ends of the two breeding boxes on the uppermost layer and the lowermost layer, a water outlet pipe is connected to the bottom end of the water outlet pipe, an equidistantly distributed connecting pipe is connected to the water outlet pipe, the connecting pipe is connected to the bottom end of the adjacent breeding box, a cleaning component is provided on the breeding box and the water tank, the cleaning component is used to clean the inner wall of the breeding box, a cleaning component is provided on the mounting ring and the breeding box, and the cleaning component is used to clean the filter and the bottom of the breeding box.

[0007] In addition, it is particularly preferred that the top of the breeding box is a hollow structure to facilitate air circulation, and the side of the breeding box away from the hollow column is open to facilitate taking and placing crabs.

[0008] In addition, it is particularly preferred that the cleaning component includes a lifting frame, which is slidably connected between the breeding boxes, an electric push rod is fixedly connected to the top of the water tank, the telescopic end of the electric push rod is fixedly connected to the lifting frame, two connecting rods are slidably connected to the breeding box, the connecting rods are fixedly connected to the lifting frame, a scraper is fixedly connected between the bottom ends of the two connecting rods, and the scraper is in contact with the inner wall of the breeding box.

[0009] In addition, it is particularly preferred that the cleaning component includes a downward pressure rod, which is fixedly connected to the scraper, one end of the downward pressure rod extends out of the breeding box, the bottom end of the breeding box is rotatably connected to a rotating rod, a cleaning brush is fixedly connected to the rotating rod, the cleaning brush is located between the bottom of the breeding box and the filter, the bottom end of the mounting ring is fixedly connected to a first guide rod, a sliding rod is slidably connected to the first guide rod, a first spring is connected between the sliding rod and the first guide rod, and a contact rod is fixedly connected to the inner end of the sliding rod.

[0010] In addition, it is particularly preferred that a spiral groove is formed on the rotating rod, and the sliding rod is pressed and matched with the rotating rod through the spiral groove.

[0011] In addition, it is particularly preferred that the ends of the contact rod and the pressing rod that are close to each other are both provided with a flat plate structure for mutual extrusion and fitting.

[0012] In addition, it is particularly preferred that an oxygenation component for oxygenating the water is also included, the oxygenation component includes a mounting plate, the mounting plate is fixedly connected to the top end of the hollow column, an oxygenation pump is fixedly connected to the mounting plate, the bottom end of the oxygenation pump is connected to a gas delivery rack, the hollow column is connected to an air outlet pipe, and the top end of the air outlet pipe extends out of the hollow column and is connected to the air delivery rack.

[0013] In addition, it is particularly preferred that an acceleration component for accelerating the oxygen dissolution efficiency is also included, the acceleration component includes a fixed plate, the fixed plate is fixedly connected to the hollow column, the fixed plate is rotatably connected to a rotating shaft, and the rotating shaft is fixedly connected to equidistantly distributed rotating blades.

[0014] In addition, it is particularly preferred that there is also a locking assembly for locking the opening and closing plate, the locking assembly includes a second guide rod, the second guide rod is fixedly connected to the side of the top of the breeding box close to the opening and closing plate, a locking plate is slidably connected to the second guide rod, and a second spring is connected between the locking plate and the second guide rod.

[0015] In addition, it is particularly preferred that the outer side of the clamping plate is inclined so that the clamping plate clamps the adjacent opening and closing plates.

[0016] Beneficial effects: 1. The water pump is controlled to operate to allow the water in the water tank to enter the spiral water inlet pipe, and then flow into the breeding box through the spray rack. When the water flows in the spiral water inlet pipe and the spray rack, the oxygen content of the water flow can be increased, thereby increasing the oxygen content in the breeding box. The filter can block the crabs at the upper part of the breeding box, and the crab excrement will leak from the filter to the lower part of the breeding box, thereby distinguishing the crab activity area and excrement, so that the excrement is deposited at the bottom of the water, ensuring the water quality of the crab activity area. When changing the water in the breeding box, the water in the breeding box can be discharged through the outlet pipe and the connecting pipe. When draining water, the scraper moves up and down to scrape off the impurities on the inner wall of the breeding box, and the cleaning brush will also rotate forward and reverse to clean the bottom of the breeding box and the filter, so that the impurities in the water and the excrement on the bottom of the water are discharged out of the breeding box along the water flow, thereby improving the breeding environment and improving the water quality.

[0017] 2. The oxygen pump operates by introducing air into the air outlet pipe through the air delivery rack, and the air outlet pipe then disperses the air above and below the hollow column, thereby increasing the oxygen content in the water flow. The water flow drives the rotating blades to rotate, which can further move the water flow, thereby accelerating the efficiency of dissolved oxygen.

[0018] 3. The clamping plate can automatically lock the opening and closing plate when it is downward, preventing the opening and closing plate from opening abnormally and causing the crabs to crawl out of the breeding box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a three-dimensional structural schematic diagram of components such as a water tank, a hollow column and a breeding box of the present invention.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of components such as a water inlet pipe, a water pump and a water outlet pipe of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the breeding box, filter screen and spray rack of the present invention.

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the lifting frame, electric push rod, connecting rod and other components of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the lifting frame, connecting rod and scraper of the present invention.

[0025] Figure 7 It is a three-dimensional structural schematic diagram of the components such as the pressing rod, the contact rod and the cleaning brush of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the first guide rod, the rotating rod, the sliding rod and other components of the present invention.

[0027] Fig. 9 It is a schematic diagram of the three-dimensional structure of the first spring, the rotating rod, the contact rod and other components of the present invention.

[0028] Fig.10 It is a three-dimensional structural schematic diagram of the components such as the mounting plate, the oxygenation pump and the gas delivery rack of the present invention.

[0029] Fig.11 It is a three-dimensional structural schematic diagram of the fixed plate, rotating shaft, rotating blades and other components of the present invention.

[0030] Fig.12 It is a schematic diagram of the three-dimensional structure of the second guide rod, the clamping plate, the opening and closing plate and other components of the present invention.

[0031] Fig.13 It is a schematic diagram of the three-dimensional structure of the second guide rod, the clamping plate and the second spring of the present invention.

[0032] In the figure: 1, water tank, 2, hollow column, 201, mounting ring, 3, breeding box, 31, filter, 4, opening and closing plate, 5, water inlet pipe, 51, spray rack, 52, water pump, 6, water outlet pipe, 61, connecting pipe, 7, lifting frame, 8, electric push rod, 9, connecting rod, 10, scraper, 11, lower pressure rod, 12, rotating rod, 13, cleaning brush, 14, first guide rod, 15, sliding rod, 16, first spring, 17, contact rod, 18, mounting plate, 19, oxygenation pump, 20, gas transmission rack, 21, outlet pipe, 22, fixing plate, 23, rotating shaft, 24, rotating blade, 25, second guide rod, 26, clamping plate, 27, second spring. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0034] Embodiment 1: A multi-layer spiral crab breeding device, such as Figure 1-Figure 9 As shown, it includes a water tank 1, a hollow column 2, a mounting ring 201, a breeding box 3, a filter 31, an opening and closing plate 4, a water inlet pipe 5, a spray rack 51, a water pump 52, a water outlet pipe 6, a connecting pipe 61, a cleaning component and a cleaning component. The right front side of the water tank 1 is connected with a water inlet interface, the upper side of the water tank 1 is connected with a hollow column 2, the hollow column 2 is fixedly connected with equidistantly distributed mounting rings 201, the mounting ring 201 is fixedly connected with a breeding box 3, the breeding box 3 is spirally distributed, the upper side of the breeding box 3 is a hollow structure, which is convenient for air circulation, the upper outer side of the breeding box 3 is open, which is convenient for taking and placing crabs, the lower inner part of the breeding box 3 is fixedly connected with a filter 31, the outer side of the breeding box 3 is rotatably connected with an opening and closing plate 4, the hollow The upper side of the column 2 is connected to a water inlet pipe 5, and the water inlet pipe 5 is connected to equidistantly distributed spray racks 51, which extend into the adjacent breeding box 3. A water pump 52 is fixedly connected to the water tank 1, and the water pump 52 is connected to the lower side of the hollow column 2. An outlet pipe 6 is connected between the lower sides of the two breeding boxes 3 on the uppermost and lowermost layers, and a water outlet interface is connected to the lower part of the outlet pipe 6. The outlet pipe 6 is connected to equidistantly distributed connecting pipes 61, and the connecting pipe 61 is connected to the lower side of the adjacent breeding box 3. Cleaning components are provided on the breeding box 3 and the water tank 1, and the cleaning components are used to clean the inner wall of the breeding box 3. Cleaning components are provided on the mounting ring 201 and the breeding box 3, and the cleaning components are used to clean the filter 31 and the bottom of the breeding box 3.

[0035] When using the device, the staff connects water to the water inlet interface, and then introduces the water into the water tank 1. The water in the water tank 1 is pumped into the hollow column 2 by the water pump 52. The water in the hollow column 2 enters the spiral water inlet pipe 5, and then flows into the breeding box 3 through the spray rack 51. When the water flows in the spiral water inlet pipe 5 and the spray rack 51, the oxygen content of the water flow can be increased, thereby increasing the oxygen content in the breeding box 3. After the staff controls the opening and closing plate 4 to rotate downward and open it, the crabs and the crabs used for breeding can be placed in the breeding box 3. In the breeding box 3, the cover and the crab are separated at the upper part of the breeding box 3 by the filter screen 31. During the breeding process, the excrement of the crab will leak from the filter screen 31 to the lower part of the breeding box 3, thereby distinguishing the crab activity area and the excrement, so that the excrement is settled at the bottom of the water, ensuring the water quality of the crab activity area. When it is necessary to change the water in the breeding box 3, the water in the breeding box 3 can be discharged through the outlet pipe 6 and the connecting pipe 61. When draining, the cleaning component and the cleaning component can clean the inside of the breeding box 3, so that the impurities and excrement in the water flow away with the discharged water.

[0036] like Figure 1 , Figure 5 and Figure 6 As shown, the cleaning assembly includes a lifting frame 7, an electric push rod 8, a connecting rod 9 and a scraper 10. The lifting frame 7 is slidably connected between the breeding boxes 3, the electric push rod 8 is fixedly connected to the front upper side of the water tank 1, the telescopic end of the electric push rod 8 is fixedly connected to the lifting frame 7, two connecting rods 9 are slidably connected to the breeding box 3, the connecting rod 9 is fixedly connected to the lifting frame 7, a scraper 10 is fixedly connected between the lower sides of the two connecting rods 9, and the scraper 10 is in contact with the inner wall of the breeding box 3.

[0037] like Figure 1 , Figure 7 , Figure 8 and Fig. 9 As shown, the cleaning assembly includes a pressing rod 11, a rotating rod 12, a cleaning brush 13, a first guide rod 14, a sliding rod 15, a first spring 16 and a contact rod 17. The scraper 10 is fixedly connected with the pressing rod 11, and the pressing rod 11 extends out of the breeding box 3. The bottom end of the breeding box 3 is rotatably connected with the rotating rod 12, and the cleaning brush 13 is fixedly connected to the upper part of the rotating rod 12. The cleaning brush 13 is located between the bottom of the breeding box 3 and the filter screen 31. The lower side of the mounting ring 201 is fixedly connected with the first guide rod 14, and the sliding rod 15 is slidably connected to the first guide rod 14. A spiral groove is opened at the lower part of the rotating rod 12, and the sliding rod 15 is squeezed and matched with the rotating rod 12 through the spiral groove. A first spring 16 is connected between the sliding rod 15 and the first guide rod 14, and the inner end of the sliding rod 15 is fixedly connected with the contact rod 17. The ends of the contact rod 17 and the pressing rod 11 that are close to each other are both provided with a flat plate structure for squeezing and matching with each other.

[0038] When draining water in the breeding box 3, the staff controls the electric push rod 8 to extend and retract. The extension and shortening of the electric push rod 8 drives the lifting frame 7 to slide up and down. The lifting frame 7 slides up and down to drive the connecting rod 9 and the scraper 10 to move up and down. The scraper 10 moves up and down to scrape off the impurities attached to the inner wall of the breeding box 3. When the scraper 10 moves downward, it also drives the pressing rod 11 to move downward. When the pressing rod 11 moves downward until it contacts the contact rod 17, the pressing rod 11 continues to move downward to push the contact rod 17 to move downward. The contact rod 17 moves downward to drive the sliding rod 15 to slide downward, the first spring 16 is deformed, and the sliding rod 15 slides downward to squeeze the rotating rod 12 to rotate. The rotation of the rotating rod 12 drives the cleaning brush 13 to rotate. When the scraper 10 moves upward, the pressing rod 11 also moves upward and no longer squeezes the contact rod 17. Under the action of the first spring 16 returning to its original position, the sliding rod 15 drives the contact rod 17 to move upward and return to its original position. The sliding upward movement of the sliding rod 15 also squeezes the rotating rod 12 to reverse, and the cleaning brush 13 reverses and returns to its original position. When the scraper 10 moves up and down to scrape off the impurities on the inner wall of the breeding box 3, the cleaning brush 13 also continuously rotates forward and reversely to clean the bottom of the breeding box 3 and the filter screen 31, so that the impurities in the water and the excretion at the bottom of the water are discharged out of the breeding box 3 along the water flow, thereby improving the breeding environment and the water quality.

[0039] Embodiment 2: Based on embodiment 1, Figure 1 and Fig.10 As shown, it also includes an oxygenation component for oxygenating the water, the oxygenation component includes a mounting plate 18, an oxygenation pump 19, an air delivery rack 20 and an air outlet pipe 21, the mounting plate 18 is fixedly connected to the upper portion of the hollow column 2, the oxygenation pump 19 is fixedly connected to the upper portion of the mounting plate 18, the lower side of the oxygenation pump 19 is connected to the air delivery rack 20, the hollow column 2 is connected to the air outlet pipe 21, and the upper end of the air outlet pipe 21 extends out of the hollow column 2 and is connected to the air delivery rack 20.

[0040] like Fig.11 As shown, it also includes an acceleration component for accelerating the dissolved oxygen efficiency, the acceleration component includes a fixed plate 22, a rotating shaft 23 and rotating blades 24, the lower part of the hollow column 2 is fixedly connected to the fixed plate 22, the rotating shaft 23 is rotatably connected to the fixed plate 22, and the rotating shaft 23 is fixedly connected to the rotating blades 24 distributed equidistantly.

[0041] When using the device, the staff controls the operation of the oxygenation pump 19, and the oxygenation pump 19 introduces air into the air outlet pipe 21 through the air delivery frame 20. The air outlet pipe 21 then disperses the air above and below the hollow column 2, thereby increasing the oxygen content in the water flow. When the water flows, it will also drive the rotating blades 24 and the rotating shaft 23 to rotate. The rotation of the rotating blades 24 can further move the water flow, thereby accelerating the dissolved oxygen efficiency.

[0042] like Figure 1 , Fig.12 and Fig.13 As shown, it also includes a locking assembly for locking the opening and closing plate 4, and the locking assembly includes a second guide rod 25, a locking plate 26 and a second spring 27. The second guide rod 25 is fixedly connected to the outside of the upper side of the breeding box 3, and the locking plate 26 is slidably connected to the second guide rod 25. The outer side of the locking plate 26 is inclined, and the locking plate 26 clamps the adjacent opening and closing plate 4. A second spring 27 is connected between the locking plate 26 and the second guide rod 25.

[0043] When it is necessary to control the opening and closing plate 4 to open, the staff pushes the card plate 26 to slide upward and separate from the opening and closing plate 4, and the second spring 27 is deformed. At this time, the opening and closing plate 4 can be rotated downward to open. After the opening and closing plate 4 is opened, the staff releases the card plate 26, and under the action of the second spring 27 returning to its original position, the card plate 26 slides downward and returns to its original position. When the opening and closing plate 4 is rotated upward to close, the opening and closing plate 4 squeezes the inclined surface of the outer end of the card plate 26, so as to control the card plate 26 upward. When the opening and closing plate 4 is closed, the card plate 26 can automatically clamp the opening and closing plate 4 downward to prevent the opening and closing plate 4 from opening abnormally and the crabs from crawling out of the breeding box 3.

[0044] The above description is only an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention should be included in the protection scope of the present invention. The contents not elaborated in detail in the present invention belong to the existing technologies known to those skilled in the art.

Claims

1. A multi-layer spiral crab breeding device, characterized in that it includes A water tank (1) is provided, the water tank (1) is connected to a water inlet interface, the top of the water tank (1) is connected to a hollow column (2), the hollow column (2) is fixedly connected to mounting rings (201) which are evenly spaced, the mounting ring (201) is fixedly connected to a breeding box (3), the breeding box (3) is spirally distributed, a filter (31) is fixedly connected inside the breeding box (3), a side of the breeding box (3) away from the hollow column (2) is rotatably connected to an opening and closing plate (4), the top of the hollow column (2) is connected to a water inlet pipe (5), the water inlet pipe (5) is connected to spray racks (51) which are evenly spaced, the spray racks (51) extend into adjacent breeding boxes (3), and the water tank (1) is connected to a water inlet pipe (5). 1) is fixedly connected to a water pump (52), the water pump (52) is connected to the bottom end of the hollow column (2), a water outlet pipe (6) is connected between the bottom ends of the two breeding boxes (3) at the uppermost layer and the lowermost layer, the bottom end of the water outlet pipe (6) is connected to a water outlet interface, the water outlet pipe (6) is connected to equidistantly distributed connecting pipes (61), the connecting pipes (61) are connected to the bottom ends of adjacent breeding boxes (3), a cleaning component is provided on the breeding box (3) and the water tank (1), the cleaning component is used to clean the inner wall of the breeding box (3), and a cleaning component is provided on the mounting ring (201) and the breeding box (3), the cleaning component is used to clean the filter screen (31) and the bottom of the breeding box (3).

2. A multi-layer spiral crab breeding device as claimed in claim 1, characterized in that: The top of the breeding box (3) is a hollow structure to facilitate air circulation, and the side of the breeding box (3) away from the hollow column (2) is open to facilitate taking and placing crabs.

3. A multi-layer spiral crab breeding device as claimed in claim 2, characterized in that: The cleaning component comprises a lifting frame (7), the lifting frame (7) is slidably connected between the breeding boxes (3), the top of the water tank (1) is fixedly connected with an electric push rod (8), the telescopic end of the electric push rod (8) is fixedly connected to the lifting frame (7), the breeding box (3) is slidably connected with two connecting rods (9), the connecting rods (9) are fixedly connected to the lifting frame (7), a scraper (10) is fixedly connected between the bottom ends of the two connecting rods (9), and the scraper (10) is in contact with the inner wall of the breeding box (3).

4. A multi-layer spiral crab breeding device as claimed in claim 3, characterized in that: The cleaning assembly comprises a lower pressure rod (11), the lower pressure rod (11) is fixedly connected to the scraper (10), one end of the lower pressure rod (11) extends out of the breeding box (3), the bottom end of the breeding box (3) is rotatably connected to a rotating rod (12), a cleaning brush (13) is fixedly connected to the rotating rod (12), the cleaning brush (13) is located between the bottom of the breeding box (3) and the filter (31), the bottom end of the mounting ring (201) is fixedly connected to a first guide rod (14), the first guide rod (14) is slidably connected to a sliding rod (15), a first spring (16) is connected between the sliding rod (15) and the first guide rod (14), and the inner end of the sliding rod (15) is fixedly connected to a contact rod (17).

5. A multi-layer spiral crab breeding device as claimed in claim 4, characterized in that: A spiral groove is formed on the rotating rod (12), and the sliding rod (15) is pressed and matched with the rotating rod (12) through the spiral groove.

6. A multi-layer spiral crab breeding device as claimed in claim 5, characterized in that: The contact rod (17) and the pressing rod (11) are provided with a flat plate structure at their ends close to each other for mutual extrusion and matching.

7. A multi-layer spiral crab breeding device as claimed in claim 6, characterized in that: The invention also comprises an oxygenation assembly for oxygenating the water, the oxygenation assembly comprising a mounting plate (18), the mounting plate (18) being fixedly connected to the top end of the hollow column (2), an oxygenation pump (19) being fixedly connected to the mounting plate (18), the bottom end of the oxygenation pump (19) being connected to a gas delivery rack (20), the hollow column (2) being connected to an air outlet pipe (21), the top end of the air outlet pipe (21) extending out of the hollow column (2) and being connected to the gas delivery rack (20).

8. A multi-layer spiral crab breeding device as claimed in claim 7, characterized in that: It also includes an accelerating component for accelerating the oxygen dissolving efficiency, the accelerating component including a fixed plate (22), the fixed plate (22) being fixedly connected to the inside of the hollow column (2), a rotating shaft (23) being rotatably connected to the fixed plate (22), and rotating blades (24) being equidistantly distributed and fixedly connected to the rotating shaft (23).

9. A multi-layer spiral crab breeding device as claimed in claim 8, characterized in that: The invention also comprises a locking assembly for locking the opening and closing plate (4), the locking assembly comprising a second guide rod (25), a second guide rod (25) being fixedly connected to a side of the top end of the breeding box (3) close to the opening and closing plate (4), a locking plate (26) being slidably connected to the second guide rod (25), and a second spring (27) being connected between the locking plate (26) and the second guide rod (25).

10. A multi-layer spiral crab breeding device as claimed in claim 9, characterized in that: The outer side of the clamping plate (26) is arranged to be inclined, and the clamping plate (26) clamps the adjacent opening and closing plates (4).

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