Micro-light-transmitting semitransparent aquaculture barrel

Abstract

The invention relates to the field of aquaculture, and discloses a micro-light-transmitting semitransparent aquaculture barrel which comprises an aquaculture barrel body, a first reinforcing ring and a second reinforcing ring are arranged on the outer wall face of the aquaculture barrel body, and a drainage hole is formed in the inner bottom end of a cavity of the aquaculture barrel body in a penetrating mode; the water temperature constant assembly comprises a water supply main pipe, a water outlet main pipe and a plurality of groups of water heat conduction circulating pipes; the aeration assembly comprises a nano aeration pipe and an air pipe; and the drainage assembly comprises a drainage pipe and a drainage unit. The culture barrel is made of food-grade PP and PPR materials, the semitransparent culture barrel is formed by adding nanoscale antibacterial master batches and optical regulation and control auxiliaries, the illumination requirements of beneficial microorganisms and plants in a water body are met, due to the reuse design of an air pipe, one path of air is supplied to a nanometer aeration pipe through the air pipe, and the other path of air is supplied to drive an automatic drainage valve through an air nozzle. The sediment blocking risk is reduced, and the practicability of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of aquaculture, and more particularly to a semi-transparent aquaculture tank with a slight light transmission. Background Technology

[0002] Traditional aquaculture tanks are mostly made of ordinary plastic or metal, with rough surfaces and insufficient chemical stability, making them easy carriers for bacteria, fungi and other microorganisms, accelerating water quality deterioration and threatening the health of aquatic animals. In addition, the opaque tank design cannot meet the specific spectral requirements of different aquaculture species. For example, shellfish farming requires specific wavelengths of light to promote the reproduction of beneficial algae, while marine fish prefer low-light environments.

[0003] During the aquaculture process, different types of aquatic products require different survival temperatures. Traditional aquaculture tanks also suffer from large temperature fluctuations within the tank, which affects the survival rate of aquatic products. The sediment produced by the aquatic products accumulates at the bottom of the tank, which may clog the sewage pipes during the sewage discharge process, requiring manual cleaning and increasing labor maintenance costs.

[0004] Therefore, this application proposes a semi-transparent aquaculture tank with micro-transmittance. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a semi-transparent, light-transmitting aquaculture tank, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A semi-transparent, light-transmitting aquaculture tank includes: a tank with an open top and a base at the bottom of its outer wall, allowing the tank to be placed on the ground; a first and second reinforcing rings on the outer wall of the tank; and a drain hole extending through the bottom of the tank cavity; a water temperature control component housed within the tank cavity for maintaining a constant water temperature, comprising a main water supply pipe, a main water outlet pipe, and multiple sets of water heat conduction circulation pipes; an aeration component including nano-aeration pipes within the tank cavity and air pipes on the outer wall of the tank; and a drainage component including a drain pipe and a drainage unit, the drainage unit comprising a pneumatic connection valve and an automatic drain valve.

[0007] According to the aforementioned semi-transparent aquaculture tank, the tank is made of food-grade PP and PPR materials, and is integrally molded by injection molding and blow molding processes by adding nano-level antibacterial masterbatch and optical control additives; for tanks with a diameter greater than 5 meters, PP and PPR raw materials of the same material as the base material are used and processed into sheets using the above-mentioned technical formula; PP and PPR raw materials of the same material as the base material are used and processed into hot melt welding rods using the above-mentioned technical formula, and then hot melt welding is performed by hot air welding gun.

[0008] According to the aforementioned semi-transparent aquaculture tank with light transmission, the optical regulation aid is an organic transparent nucleating agent. The agent and the spectrally selectively permeable material enable uniform and soft transmission of light in the 400-700nm wavelength band of the support frame unit.

[0009] According to the aforementioned semi-transparent aquaculture tank, the bottom of the tank cavity is shaped like a 15°-20° inclined funnel, and the drainage hole is located at the lowest point of the bottom of the tank cavity.

[0010] According to the aforementioned semi-transparent aquaculture tank, the first reinforcing ring is welded and installed on the top of the outer wall of the tank, and the second reinforcing ring is welded and fixed to the bottom of the outer wall of the tank. The first and second reinforcing rings are made of PP water pipes, and the outer diameter of the first and second reinforcing rings is 25mm.

[0011] According to the aforementioned translucent aquaculture tank, the nano-aeration tube is 10 cm away from the bottom of the tank cavity, and one end of the nano-aeration tube is fixedly inserted through the tank and connected to the air pipe.

[0012] According to the aforementioned semi-transparent aquaculture tank, one end of the drain pipe is connected to the drain hole, the end of the drain pipe away from the drain hole is an upward-facing bend, and is fixedly connected to the pneumatic connection valve. The top of the pneumatic connection valve is provided with a water circulation connection port, and the outer circumferential surface of the pneumatic connection valve is provided with an air nozzle. An automatic drain valve is fixedly installed on the top of the outer circumferential surface of the drain pipe, one end of the automatic drain valve is connected to a drain outlet, and the end of the air pipe away from the nano aeration pipe is connected to the drain pipe and fixedly connected.

[0013] According to the aforementioned semi-transparent aquaculture tank, one end of both the main water supply pipe and the main water outlet pipe passes through and is fixed to the aquaculture tank. The outer circumference of the main water supply pipe is connected to one end of multiple sets of water and heat conduction circulation pipes, and the outer circumference of the main water outlet pipe is connected to the other end of multiple sets of water and heat conduction circulation pipes. The water and heat conduction circulation pipes are made of polyethylene plastic. A support frame unit for support is also provided inside the aquaculture tank cavity. The support frame unit includes a support pole fixedly installed at the bottom of the aquaculture tank cavity. The support pole is close to the inner wall of the aquaculture tank. Multiple sets of first placement frames for supporting the water and heat conduction circulation pipes are fixedly installed on the outer wall of the support pole. A second placement frame for supporting the nano-aeration pipes is also fixedly installed at the bottom of the support pole.

[0014] This invention provides a semi-transparent, light-transmitting aquaculture tank. It has the following beneficial effects: (1) This application sets up breeding tanks using food-grade PP and PPR materials, and adds nano-level antibacterial masterbatch and optical control additives, and integrally molds them through injection molding and blow molding processes; for tanks with a diameter greater than 5 meters, PP and PPR raw materials of the same material as the base material are used and processed into plates using the above-mentioned technical formula; PP and PPR raw materials of the same material as the base material are used and processed into hot melt welding rods using the above-mentioned technical formula, and hot melt welding is performed by hot air welding gun.

[0015] The optical regulation aid is an organic transparent nucleating agent and a spectrally selectively transparent material, which enables uniform and soft light transmission in the 400-700nm wavelength band of the support frame unit. This not only meets the light requirements of beneficial microorganisms and plants in the water, but also balances their reproduction and growth. It can create an environment similar to an "aquatic forest state," giving the aquatic organisms the illusion of living in a large aquatic environment, and making it easier for aquaculture personnel to observe the activity status of the aquatic organisms.

[0016] (2) By setting a constant water temperature component, the water heated or cooled by the outside passes through the main water supply pipe, the water heat conduction circulation pipe and the main water outlet in sequence. This indirect heat exchange method can control the temperature of the aquaculture water body evenly, stably and accurately, and avoid the stress and growth inhibition caused by temperature fluctuations to aquatic organisms. It is especially suitable for seedlings or high-value species that require temperature control. The aquaculture tank cavity is also equipped with a support frame unit for support. The support frame unit includes a support rod fixedly installed at the bottom of the aquaculture tank cavity. The support rod is close to the inner wall of the aquaculture tank. Multiple sets of first placement frames for supporting the water heat conduction circulation pipe are fixedly installed on the outer wall of the support rod, which effectively prevents the water heat conduction circulation pipe from bending. The bottom of the support rod is also fixedly installed with a second placement frame for supporting the nano aeration pipe, which improves the vertical space utilization rate, improves the structural stability of the device and reduces the later maintenance.

[0017] (3) By setting up a drain hole and a drain pipe to connect, the air pipe is designed for reuse. One air supply goes through the air pipe to the nano aeration pipe. The nano aeration pipe is used to disperse air into nano-sized particles and integrate the nano-sized particles into the water in the breeding tank to increase the dissolved oxygen content of the water and increase the fish and shrimp production in the breeding tank. The other air supply drives the automatic drain valve through the air nozzle. The automatic drain valve is fixedly installed on the top of the outer circumference of the drain pipe. One end of the automatic drain valve is connected to the drain port. The end of the air pipe away from the nano aeration pipe is connected to the drain pipe and fixed. The drain pipe adopts an upward bend design and automatic drain valve control to reduce the risk of sediment blockage and improve the practicality of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of a semi-transparent aquaculture tank according to the present invention. Figure 1 ; Figure 2This is a schematic diagram of the external structure of a semi-transparent aquaculture tank according to the present invention. Figure 2 ; Figure 3 This is a top view of a semi-transparent aquaculture tank according to the present invention. Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a three-dimensional structural diagram of a water temperature constant component for a semi-transparent aquaculture tank according to the present invention. Figure 6 This is a three-dimensional structural diagram of the support frame unit of a semi-transparent aquaculture tank according to the present invention.

[0019] Legend: 10. Breeding tank; 11. Base; 12. Air pipe; 13. First reinforcing ring; 14. Second reinforcing ring; 16. Drain hole; 20. Drainage unit; 21. Drainage pipe; 22. Automatic drain valve; 23. Pneumatic connection valve; 24. Air nozzle; 25. Nano-aeration pipe; 26. Water circulation connection port; 30. Water temperature constant component; 31. Water supply main pipe; 32. Water outlet main pipe; 33. Water heat conduction circulation pipe; 40. Support frame unit; 41. Support pole; 42. First placement frame; 43. Second placement frame. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] Please see Figure 1-6As shown, this invention is a semi-transparent aquaculture tank with a micro-transmittance, comprising a tank 10. The top of the tank 10 is open, and a base 11 is provided at the bottom of the outer wall of the tank 10. The tank 10 is placed on the ground via the base 11. A first reinforcing ring 13 and a second reinforcing ring 14 are provided on the outer wall of the tank 10 to reinforce the tank 10, enhance its pressure resistance, and prevent deformation under water pressure. A drainage hole 16 is provided through the bottom of the tank 10 cavity to achieve zero wastewater residue. The tank 10 is made of food-grade PP and PPR materials, and is integrally formed by injection molding and blow molding processes by adding nano-level antibacterial masterbatch and optical control additives. For tanks with a diameter greater than 5 meters, PP and PPR raw materials of the same material as the base material are used and processed into sheets using the above-mentioned technical formula. PP and PPR raw materials of the same material as the base material are used and processed into hot melt welding rods using the above-mentioned technical formula, and then hot melt welded into shape using a hot air welding gun. The optical regulation aid is an organic transparent nucleating agent and a spectrally selectively transparent material, which enables uniform and soft light transmission in the 400-700nm wavelength band of the support frame unit. This not only meets the light requirements of beneficial microorganisms and plants in the water, but also balances their reproduction and growth. It can create an environment similar to an "aquatic forest state," giving the aquatic organisms the illusion of living in a large aquatic environment, and making it easier for aquaculture personnel to observe the activity status of the aquatic organisms.

[0022] like Figure 1-2 As shown, the bottom of the chamber of the aquaculture tank 10 is shaped like a 15°-20° inclined funnel. The drain hole 16 is located at the lowest point of the bottom of the chamber of the aquaculture tank 10, facilitating the discharge of sediment. The aquaculture tank 10 offers various wall thicknesses ranging from 0.5 to 2 cm, and diameters from 5 to 10 mm and heights from 1 to 1 mm. Available in a series of 1.5m sizes to suit different aquaculture scenarios. The first reinforcing ring 13 is welded and installed on the top of the outer wall of the aquaculture tank 10, and the second reinforcing ring 14 is welded and fixed to the bottom of the outer wall of the aquaculture tank 10. The first reinforcing ring 13 and the second reinforcing ring 14 are made of PP water pipe, and the outer diameter of the first reinforcing ring 13 and the second reinforcing ring 14 is 25mm. The first reinforcing ring 13 is used to reinforce the stability of the top of the aquaculture tank 10 and prevent the water inside the aquaculture tank 10 from surging. The second reinforcing ring 14 is used to reinforce the stability of the bottom of the aquaculture tank 10 and prevent the bottom of the aquaculture tank 10 from cracking due to the pressure of the water inside the tank. It effectively resists water pressure and external pressure and prevents the tank from deforming, bulging or breaking.

[0023] like Figure 3 and Figure 5As shown, the water temperature constant-temperature component 30 is installed inside the aquaculture tank 10 to maintain a constant water temperature. The water temperature constant-temperature component 30 includes a water supply main pipe 31, a water outlet main pipe 32, and multiple sets of water heat conduction circulation pipes 33. One end of the water supply main pipe 31 and the water outlet main pipe 32 are fixed through the aquaculture tank 10. The outer circumference of the water supply main pipe 31 is connected to one end of the multiple sets of water heat conduction circulation pipes 33, and the outer circumference of the water outlet main pipe 32 is connected to the other end of the multiple sets of water heat conduction circulation pipes 33. Externally heated or cooled water passes through the water supply main pipe 31, the water heat conduction circulation pipes 33, and the water outlet main pipe 32 in sequence. This indirect heat exchange method can uniformly, stably, and accurately control the temperature of the aquaculture water, avoiding the stress and growth inhibition caused by temperature fluctuations to aquatic organisms. It is especially suitable for seedling cultivation or high-value species aquaculture that requires temperature control. The water heat conduction circulation pipes 33 are made of polyethylene plastic, which has good corrosion resistance and a long service life.

[0024] like Figure 4 As shown, the drainage assembly includes a drain pipe 21 and a drainage unit 20. The drainage unit 20 includes a pneumatic connection valve 23 and an automatic drain valve 22. One end of the drain pipe 21 is connected to the drain hole 16. Sediment in the breeding tank 10 is discharged through the drain hole 16 and the drain pipe 21. The end of the drain pipe 21 away from the drain hole 16 is an upward-facing bend and is fixedly connected to the pneumatic connection valve 23. The top of the pneumatic connection valve 23 is provided with a water circulation connection port 26, and the outer peripheral surface of the pneumatic connection valve 23 is provided with an air nozzle 24. An air pump is installed on one side, and the air pump is connected to the air nozzle 24 through a pipe. Through the reuse design of the air pipe 12, one air supply goes through the air pipe 12 to the nano aeration pipe 25, and the other air supply goes through the air nozzle 24 to drive the automatic drain valve 22. The automatic drain valve 22 is fixedly installed on the top of the outer peripheral surface of the drain pipe 21. One end of the automatic drain valve 22 is connected to the drain port. The end of the air pipe 12 away from the nano aeration pipe 25 is connected to the drain pipe 21 and fixed. The drain pipe 21 adopts an upward bend design and is controlled by the automatic drain valve 22 to reduce the risk of sediment blockage.

[0025] It should be noted that controlling the operation of the automatic drain valve by using an air pump connected to the air nozzle of the pneumatic connection valve through a pipeline is a well-known prior art and will not be elaborated here.

[0026] like Figure 1 and Figure 5 As shown, the aeration assembly includes a nano-aeration pipe 25 disposed inside the chamber of the aquaculture tank 10 and an air pipe 12 disposed on the outer wall of the aquaculture tank 10. The nano-aeration pipe 25 is 10 cm away from the bottom of the chamber of the aquaculture tank 10, and one end of the nano-aeration pipe 25 is fixedly inserted through the aquaculture tank 10 and connected to the air pipe 12. The nano-aeration pipe 25 is used to disperse air into nano-sized particles and integrate the nano-sized particles into the water in the aquaculture tank to increase the dissolved oxygen content of the water and increase the fish and shrimp production in the aquaculture tank.

[0027] like Figure 6 As shown, a support frame unit 40 is also provided inside the cavity of the breeding tank 10. The support frame unit 40 includes a support rod 41 fixedly installed at the bottom of the cavity of the breeding tank 10. The support rod 41 is close to the inner wall of the breeding tank 10. Multiple sets of first placement frames 42 for supporting the water heat conduction circulation pipe 33 are fixedly installed on the outer wall of the support rod 41, which effectively prevents the water heat conduction circulation pipe 33 from bending. A second placement frame 43 for supporting the nano aeration pipe 25 is also fixedly installed at the bottom of the support rod 41, which improves the utilization rate of vertical space, improves the structural stability of the device, and reduces later maintenance.

[0028] The implementation principle of this invention, a semi-transparent aquaculture tank with micro-transparency, is as follows: First, the aquaculture tank 10 eliminates internal cloudiness in the crystalline region by adding an organic transparent nucleating agent, improving light transmission uniformity. The optical control agent is an organic transparent nucleating agent and a spectrally selective transparent material, achieving uniform and soft light transmission in the 400-700nm wavelength band of the support unit. This satisfies the light requirements of beneficial microorganisms and plants in the aquatic body, ensuring a balance in their reproduction and growth. It can create an environment similar to an "aquatic forest," giving the cultured organisms the illusion of living in a large aquatic environment. It also facilitates the observation of the organisms' activity by aquaculture personnel. The first reinforcing ring 13 is welded to the top of the outer wall of the aquaculture tank 10, and the second reinforcing ring 14 is welded to the bottom of the outer wall of the aquaculture tank 10, effectively resisting water pressure and external pressure, preventing the tank from deforming, bulging, or breaking.

[0029] Secondly, the water temperature constant-temperature component 30 is installed inside the aquaculture tank 10. Externally heated or cooled water flows sequentially through the main water supply pipe 31, the water heat conduction circulation pipe 33, and the main water outlet pipe 32. This indirect heat exchange method can uniformly, stably, and precisely control the temperature of the aquaculture water, avoiding stress and growth inhibition caused by temperature fluctuations to aquatic organisms. It is especially suitable for seedling cultivation or the aquaculture of high-value species requiring temperature control. A nano-aeration pipe 25 is installed inside the aquaculture tank 10. The nano-aeration pipe 25 disperses air into nano-sized particles and integrates these particles into the water within the aquaculture tank, thereby increasing the dissolved oxygen content of the water. To increase the yield of fish and shrimp in the aquaculture tank, a support frame unit 40 is also provided inside the aquaculture tank 10 cavity. The support frame unit 40 includes a support pole 41 fixedly installed at the bottom of the aquaculture tank 10 cavity. The support pole 41 is close to the inner wall of the aquaculture tank 10. Multiple sets of first placement frames 42 for supporting the water heat conduction circulation pipe 33 are fixedly installed on the outer wall of the support pole 41, which effectively prevents the water heat conduction circulation pipe 33 from bending. A second placement frame 43 for supporting the nano aeration pipe 25 is also fixedly installed at the bottom of the support pole 41, which improves the utilization rate of vertical space, improves the structural stability of the device, and reduces later maintenance.

[0030] Finally, the drain hole 16 at the bottom of the chamber of the breeding tank 10 is connected to the drain pipe 21. An air pump is installed on one side of the breeding tank 10. The air pump is connected to the air nozzle 24 through a pipe. Through the reuse design of the air pipe 12, one air supply goes through the air pipe 12 to the nano aeration pipe 25, and the other air supply goes through the air nozzle 24 to drive the automatic drain valve 22. The automatic drain valve 22 is fixedly installed on the top of the outer circumference of the drain pipe 21. One end of the automatic drain valve 22 is connected to the drain outlet. The end of the air pipe 12 away from the nano aeration pipe 25 is connected to the drain pipe 21 and fixed. The drain pipe 21 adopts an upward bend design and is controlled by the automatic drain valve 22 to reduce the risk of sediment blockage.

[0031] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The scope of protection of this invention does not involve any improvement to the software and methods.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A semi-transparent, light-transmitting aquaculture tank, characterized in that, include: The breeding tank (10) has an open top and a base (11) at the bottom of the outer wall of the breeding tank (10). The breeding tank (10) is placed on the ground through the base (11). The outer wall of the breeding tank (10) is provided with a first reinforcing ring (13) and a second reinforcing ring (14). A drainage hole (16) is opened through the bottom of the cavity of the breeding tank (10). A water temperature constant component (30) is installed inside the breeding tank (10) to maintain a constant water temperature. The water temperature constant component (30) includes a water supply main pipe (31), a water outlet main pipe (32), and multiple sets of water heat conduction circulation pipes (33). An aeration assembly, comprising a nano-aeration tube (25) disposed in the cavity of the aquaculture tank (10) and an air tube (12) disposed on the outer wall of the aquaculture tank (10). The drainage assembly includes a drain pipe (21) and a drainage unit (20), the drainage unit (20) including a pneumatic connection valve (23) and an automatic drain valve (22).

2. The semi-transparent aquaculture tank according to claim 1, characterized in that: The breeding tank (10) is made of food-grade PP and PPR materials. It is integrally formed by injection molding and blow molding processes by adding nano-level antibacterial masterbatch and optical control agent. For tanks with a diameter greater than 5 meters, PP and PPR raw materials of the same material as the base material are used and processed into plates using the above-mentioned technical formula. PP and PPR raw materials of the same material as the base material are used and processed into hot melt welding rods using the above-mentioned technical formula, and then hot melt welding is performed by hot air welding gun.

3. The semi-transparent aquaculture tank according to claim 2, characterized in that: The optical modulation aid is an organic transparent nucleating agent and a spectrally selective transparent material, which enables uniform and soft transmission of light in the 400-700nm wavelength band of the support frame unit.

4. The semi-transparent aquaculture tank according to claim 1, characterized in that: The bottom of the cavity of the breeding tank (10) is shaped like a 15°-20° inclined funnel, and the drainage hole (16) is located at the lowest point of the bottom of the cavity of the breeding tank (10).

5. The semi-transparent aquaculture tank according to claim 1, characterized in that: The first reinforcing ring (13) is welded and installed on the top of the outer wall of the breeding tank (10), and the second reinforcing ring (14) is welded and fixed on the bottom of the outer wall of the breeding tank (10). The first reinforcing ring (13) and the second reinforcing ring (14) are made of PP water pipes, and the outer diameter of the first reinforcing ring (13) and the second reinforcing ring (14) is 25mm.

6. The semi-transparent aquaculture tank according to claim 1, characterized in that: The nano-aeration tube (25) is 10 cm away from the bottom of the cavity of the breeding tank (10). One end of the nano-aeration tube (25) is fixedly inserted through the breeding tank (10) and connected to the air pipe (12).

7. The semi-transparent aquaculture tank according to claim 1, characterized in that: One end of the drain pipe (21) is connected to the drain hole (16). The end of the drain pipe (21) away from the drain hole (16) is an upward bend and is fixedly connected to the pneumatic connection valve (23). The top of the pneumatic connection valve (23) is provided with a water circulation connection port (26). The outer circumferential surface of the pneumatic connection valve (23) is provided with an air nozzle (24). The top of the outer circumferential surface of the drain pipe (21) is fixedly installed with an automatic drain valve (22). One end of the automatic drain valve (22) is connected to a drain outlet. The end of the air pipe (12) away from the nano aeration pipe (25) is connected to the drain pipe (21) and fixedly connected.

8. The semi-transparent aquaculture tank according to claim 1, characterized in that: One end of the water supply main pipe (31) and the water outlet main pipe (32) both pass through the fixed breeding tank (10). The outer circumference of the water supply main pipe (31) is connected to one end of multiple sets of water heat conduction circulation pipes (33), and the outer circumference of the water outlet main pipe (32) is connected to the other end of multiple sets of water heat conduction circulation pipes (33). The water heat conduction circulation pipes (33) are made of polyethylene plastic. A support frame unit (40) for support is also provided in the cavity of the breeding tank (10). The support frame unit (40) includes a support rod (41) fixedly installed at the bottom of the cavity of the breeding tank (10). The support rod (41) is close to the inner wall of the breeding tank (10). Multiple sets of first placement frames (42) for supporting the water heat conduction circulation pipes (33) are fixedly installed on the outer wall of the support rod (41). A second placement frame (43) for supporting the nano aeration pipe (25) is also fixedly installed at the bottom of the support rod (41).

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