Unpowered dissolved oxygen booster for aquaculture systems

Abstract

The present invention provides an unpowered dissolved oxygen pressurizing device for an aquatic breeding system, which is used to be placed in the drain outlet of a breeding tank for aquatic crustaceans, and comprises a double-layer drain pipe and a dissolved oxygen pressurizer, wherein the double-layer drain pipe comprises an outer pipe and an inner pipe, wherein the inner pipe comprises an upper section pipeline and a lower section pipeline, wherein the upper and lower sections pipeline are movably connected, wherein a plurality of water inlet holes are arranged at the outer bottom of the outer pipe, wherein the upper edge height of the inner pipe is lower than the upper edge height of the outer pipe, wherein the inner pipe is used to control the water level height of the breeding tank, and the size of the upper section pipeline is designed to be the same as the size of the lower section pipeline. The unpowered dissolved oxygen pressurizing device of the present invention does not require air supply, nor does it require an electric oxygenator or aerator, and is suitable for a circulating water breeding mode, especially an indoor factory shallow water breeding mode, and improves oxygen solubility while aerating, and has a simple structure, is safe and convenient to use, and has good economic efficiency.

Description

Technical Field

[0001] The invention relates to a dissolved oxygen pressurizing device, in particular to an unpowered dissolved oxygen pressurizing device used in an aquaculture system. Background Art

[0002] Dissolved oxygen is one of the most important and most problematic water quality factors in aquaculture. The actual dissolved oxygen content of water changes constantly due to the combined influence of biological, physical and chemical factors. When the dissolved oxygen in water is insufficient, it first directly affects aquatic animals; secondly, it indirectly affects aquatic animals by affecting other biological and physical and chemical indicators in the water environment, causing varying degrees of harm to their growth, reproduction and even survival. In mild cases, the animals’ physical condition deteriorates and their growth slows down. In severe cases, they float to the surface and flood the pond, leading to mass deaths.

[0003] The commonly used technologies / devices for increasing dissolved oxygen in China's traditional shrimp farming industry include oxygenators, aerators, etc., as well as some related invention patent technologies.

[0004] 1) Aerator is a machine commonly used in fish farming. Its main function is to increase the oxygen content in the water to ensure that the fish in the water will not be deprived of oxygen. It can also inhibit the growth of anaerobic bacteria in the water and prevent the deterioration of the pond water and threaten the living environment of the fish. Aerators generally rely on their own air pump to pump air into the water to achieve the purpose of increasing the oxygen content in the water.

[0005] 2) The aerator injects "micro bubbles" directly into the water through the air-diffusing impeller, so that the inhaled air and water are evenly mixed, and the bubbles produced are small and numerous, with a high dissolved oxygen rate.

[0006] 3) Patent CN102870737A discloses an aeration device for aquaculture water, wherein a pressure water inlet pipe and a compressed air inlet pipe are respectively inserted into the gas-liquid mixing pipe along the axis of the vertically arranged gas-liquid mixing pipe, and are connected to the upper end of the inner cavity of the gas-liquid mixing pipe. The inner cavity of the gas-liquid mixing pipe is a circular tubular chamber with built-in multi-section spiral blades. The lower end of the inner cavity of the gas-liquid mixing pipe is connected to one end of the inner cavity of the gas-liquid separation pipe through a bend pipe. The inner cavity of the gas-liquid separation pipe is a horizontally arranged cylindrical chamber. The top of the inner cavity of the gas-liquid separation pipe is connected to the upper end of the inner cavity of the gas-liquid mixing pipe through a gas recovery pipe. The other end of the inner cavity of the gas-liquid separation pipe is connected to the oxygenated water drainage pipe. The inner diameter of the gas-liquid separation pipe is larger than the inner diameter of the gas-liquid mixing pipe, the inner diameter of the oxygenated water drainage pipe and the inner diameter of the bend pipe. The water pressure of the pressure water in the pressure water inlet pipe is greater than the air pressure of the compressed air in the compressed air inlet pipe.

[0007] In the field of aquaculture, the main function of aeration devices is to provide sufficient oxygen for farmed animals and promote their healthy growth. There are two types of aeration devices available: one is the blast aeration device, which is divided into large-pore aeration devices, medium-pore aeration devices, small-pore aeration devices and micro-pore aeration devices; the other is the mechanical surface aeration device, which often uses impellers and blades to rotate and hit the water surface to achieve the purpose of oxygenation. The latter has high energy consumption and is not suitable for indoor factory farming. Therefore, blast aeration devices are commonly used at present.

[0008] As the aquaculture industry gradually develops towards high-density and intensive development, the requirements for dissolved oxygen concentration in aquaculture water are getting higher and higher. Dissolved oxygen is usually the first limiting factor for high-density aquaculture capacity. In order to meet the development needs of modern aquaculture, pure oxygen is usually used as the air source for aeration devices in high-density factory-scale circulating water aquaculture. In order to facilitate the dissolution of pure oxygen in the water, oxygen dissolution is generally achieved through independent equipment such as low-pressure oxygen dissolvers, high-pressure oxygen dissolvers and other equipment.

[0009] The above oxygenators and aerators all require a large amount of electricity support and are generally used in traditional outdoor shrimp farming modes and indoor high-level pond farming modes, that is, they are suitable for situations where the farming water has a certain depth; the technology provided by CN102870737A requires pressurized water and pressurized air, which means that artificial power is also required to obtain a good dissolved oxygen effect; in short, the current dissolved oxygen pressurization technology has requirements for water depth and requires additional power support. It is less applicable to the 10cm-20cm shallow water farming mode and consumes electricity.

[0010] In addition, the method of using aerators and aerators for oxygenation has the following defects:

[0011] 1) In production practice, many aquaculture farms in remote areas have few oxygen production plants and it is difficult to obtain pure oxygen, which seriously restricts the development of high-density factory aquaculture in the local area.

[0012] 2) Traditional aeration and oxygenation devices generally aerate the fish pond through aeration stones and microporous aeration disks. The former has the disadvantages of large bubbles, uneven bubbles, short air-water contact time, resulting in low oxygen utilization rate; the latter has the disadvantages of large pressure loss, uneven air distribution, easy clogging, and easy breakage.

[0013] 3) A set of special oxygen production and aeration equipment is required, and the sealing of the whole set of equipment is very high. If there is equipment failure or pipeline damage, resulting in pure oxygen leakage, it is easy to cause production accidents.

[0014] 4) It is mostly suitable for traditional deep-water aquaculture or indoor high-level pond aquaculture, and its applicability to indoor factory-based shallow-water aquaculture models is generally poor.

[0015] Therefore, it is necessary to further improve the prior art. Summary of the invention

[0016] The purpose of the present invention is to provide a non-powered dissolved oxygen pressurizing device for an aquaculture system, which can solve the technical problem of insufficient dissolved oxygen in the factory-scale indoor circulating aquaculture model.

[0017] The present invention provides a non-powered dissolved oxygen pressurizing device for an aquatic aquaculture system, which is used to be placed in the drain outlet of an aquatic crustacean aquaculture tank, and comprises a double-layer drain pipe and a dissolved oxygen pressurizing device.

[0018] The double-layer drainage pipe comprises an outer pipe and an inner pipe, the inner pipe comprises an upper pipe section and a lower pipe section, the upper pipe section and the lower pipe section are movably connected, a plurality of water inlet holes are arranged at the outer bottom of the outer pipe, the upper edge height of the inner pipe is lower than the upper edge height of the outer pipe, the inner pipe is used to control the water level of the breeding tank, and the size of the upper pipe section is designed to be the same as that of the lower pipe section; water flows in from the water inlet holes, and flows up along the inner pipe to the upper edge of the inner pipe, and then flows over the upper edge, and flows downward through the inner pipe to the breeding tank at the lower layer;

[0019] The dissolved oxygen booster is used to be placed inside the inner tube of the double-layer drainage pipe to increase the dissolved oxygen content of the water body. The dissolved oxygen booster includes a deflector, an air inlet pipe and a first deflector plate.

[0020] The deflector is arranged at the top, and the deflector is designed to be disc-shaped;

[0021] The air inlet pipe is fixedly connected to the lower part of the deflector, an air inlet pipe is arranged in the middle of the air inlet pipe, and the air inlet pipe is communicated with the external air;

[0022] The first guide plate is symmetrically arranged around the air inlet pipe, and is used to guide the water flow to flow down along the inner wall of the inner pipe to the breeding tank at the lower layer.

[0023] Preferably, the inner wall of the inner tube is provided with a second guide plate, which is arranged at the same height as the lower port of the air inlet pipe, so as to allow the water flow to fully merge with the air at the bottom end of the air inlet pipe.

[0024] Preferably, the inner wall of the inner tube is further provided with a plurality of rain shower plates, and the plurality of rain shower plates are fixedly arranged in upper and lower layers.

[0025] Preferably, the rain shower plate is configured as a mesh structure.

[0026] Preferably, the first guide plate is a blade-type guide plate.

[0027] Preferably, the number of the blade-type guide plates is four, and the four blade-type guide plates are symmetrically arranged around the air inlet pipe.

[0028] Preferably, the dissolved oxygen booster is designed to be a conical structure in appearance.

[0029] Preferably, the deflector has an angle of 30 degrees with the horizontal direction.

[0030] Preferably, the second guide plate is configured as a blade-type guide plate.

[0031] Preferably, the upper pipeline and the lower pipeline are connected via a threaded connection or a threaded joint.

[0032] Compared with the prior art, the unpowered dissolved oxygen pressurizing device for aquaculture system of the present invention has the following beneficial effects:

[0033] 1. The unpowered dissolved oxygen booster device of the present invention does not require air supply, nor does it require an electric oxygenator or aerator. It is suitable for circulating water aquaculture mode, especially indoor factory shallow water aquaculture mode. It improves oxygen solubility while aerating, has a simple structure, is safe and convenient to use, and has good economy.

[0034] 2. The present invention adopts unpowered dissolved oxygen booster, aquatic crustacean molting and solid residue separator and other devices to increase the amount of dissolved oxygen in water, improve water quality, and reduce the occurrence of diseases. It can achieve zero emission, zero pollution, no drugs, and no antibiotics, forming a green, safe, and environmentally friendly product. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only used to explain the concept of the present invention.

[0036] Figure 1 It is a structural schematic diagram of the breeding tank of the present invention;

[0037] Figure 2 It is a structural schematic diagram of a dissolved oxygen booster provided in the inner tube of the present invention;

[0038] Figure 3 It is a schematic diagram of the structure of the dissolved oxygen booster of the present invention applied to a double-layer drainage pipe in a breeding tank.

[0039] Summary of reference numerals:

[0040] 1. Breeding trough 2. Drainage outlet 3. External pipe

[0041] 4. Inner tube 5. Water inlet 6. Flow guide

[0042] 7. Air inlet pipe 8. Air intake pipe 9. First guide plate

[0043] 10. Rain shower plate 11. Second guide plate DETAILED DESCRIPTION

[0044] Hereinafter, an embodiment of an unpowered dissolved oxygen pressurizing device for an aquaculture system of the present invention will be described with reference to the accompanying drawings.

[0045] The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention, are illustrative and exemplary, and should not be interpreted as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the contents disclosed in the specification of this application, including any obvious replacement and modification of the embodiments described herein.

[0046] The drawings in this specification are schematic diagrams, which assist in explaining the concept of the present invention and schematically show the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structures of various parts of the embodiments of the present invention, the drawings are not necessarily drawn in the same proportions. The same or similar reference numerals are used to represent the same or similar parts.

[0047] like Figure 1 and 3 As shown, the present invention provides a non-powered dissolved oxygen pressurizing device for an aquatic breeding system, which is used to be placed in a drain port 2 of a breeding tank 1 for aquatic crustaceans, and comprises a double-layer drain pipe and a dissolved oxygen pressurizing device.

[0048] The double-layer drainage pipe is suitable for the drainage port 2 of the breeding tank 1 with multiple layers arranged up and down. The double-layer drainage pipe includes an outer pipe 3 and an inner pipe 4, the inner pipe 4 includes an upper pipe section and a lower pipe section, the upper pipe section and the lower pipe section are movably connected, a plurality of water inlet holes 5 are arranged at the outer bottom of the outer pipe 3, the upper edge height of the inner pipe 4 is lower than the upper edge height of the outer pipe 3, the inner pipe 4 is used to control the water level height of the breeding tank 1, and the size of the upper pipe section is designed to be the same as that of the lower pipe section; water flows in from the water inlet holes 5, and flows up along the inner pipe 4 to the upper edge of the inner pipe 4, and then flows over the upper edge, and flows downward through the inner pipe 4 to the breeding tank 1 at the lower layer.

[0049] A threaded buckle or a threaded joint can be provided at the drain port 2, and the double-layer drain pipe can be fixed to the drain port 2 by rotating and tightening. The drain port 2 in the upper breeding tank 1 is the water inlet of the lower breeding tank 1. The drain ports 2 in the breeding tanks 1 of the upper and lower adjacent layers are arranged at a diagonal position to increase the water flow and improve the dissolved oxygen content in the water.

[0050] The double-layer drainage pipe refers to a set of tubular devices installed at the drainage outlet 2 in each layer of the breeding trough 1. It is a top-bottom combination design. The top-bottom combination means that the upper pipe A and the lower pipe B are connected by threaded connection or internal and external thread joints. After the connection, the upper pipe A and the lower pipe B can be combined into a complete inner pipe 4N; the double-layer means that the upper pipe A and the lower pipe B are combined to form an inner pipe 4N and an outer pipe 3W.

[0051] The diameters of the upper pipe A and the lower pipe B are about 2.5 inches. The function of the upper pipe A is to limit the height of the aquaculture water body and is about 20 cm long. The length of the lower pipe B is determined according to the spacing of the aquaculture tanks 1, but its bottom end is about 2 cm away from the water surface of the lower aquaculture tank 1. The outer pipe 3W has a diameter of about 3 inches and a length of about 24 cm. It is sleeved outside the inner pipe 4N, and some water inlet holes 5 are engraved on the pipe wall to accelerate the water flow speed, form a greater power, and surge along the inner pipe 4 to the upper edge of the inner pipe 4, and then flow over the upper edge, and flow downward through the inner pipe 4 to the lower aquaculture tank 1; the function of the outer pipe W is to make the water generate more kinetic energy when flowing, and when it flows out of the lower pipe B and reaches the water surface of the lower aquaculture tank 1, it has a greater impact force, generates a larger area of ​​water splash, and creates more oxygen using physical principles.

[0052] It should be noted that the bottom of the upper section of the outer pipe 3 and the inner pipe 4 can be integrated; or the upper section of the outer pipe 3 and the inner pipe 4 can be independently set. During installation, the outer pipe 3 only needs to be put on the outside of the inner pipe 4, and the inner pipe 4 is fixed in the drain outlet 2 by threaded connection or threaded joint connection.

[0053] like Figure 2 and 3 As shown, the dissolved oxygen booster is used to be placed inside the inner tube 4 of the double-layer drainage pipe to increase the dissolved oxygen content in the water. The dissolved oxygen booster is designed to be a conical structure in appearance, including a deflector 6, an air inlet pipe 7 and a first deflector 9. The deflector 6 is arranged at the top and is designed to be disc-shaped; the air inlet pipe 7 is fixedly connected below the deflector 6, and an air inlet pipe 8 is arranged in the middle of the air inlet pipe 7, and the air inlet pipe 8 is connected to the external air; the first deflector 9 is symmetrically arranged around the air inlet pipe 7, and is used to guide the water flow to flow down along the inner wall of the inner tube 4 to the lower breeding tank 1. The first deflector 9 is designed as a blade-type deflector, which can be specifically designed to have 4 or 5 or other numbers, and can also be designed to be other numbers, not limited to 4 or 5. The 4 or 5 blade-type deflectors are symmetrically arranged around the air inlet pipe 7.

[0054] In order to better guide the flow of water, the deflector 6 is set to have an angle of 30 degrees with the horizontal direction.

[0055] like Figure 2As shown, the inner wall of the inner tube 4 is provided with a second guide plate 11, which is arranged at the same height as the lower end of the air inlet pipe 8, so as to make the water flow fully merge with the air at the bottom end of the air inlet pipe 7. In addition, the inner wall of the inner tube 4 is also provided with a plurality of shower plates 10, which are fixedly arranged in layers up and down, and the shower plates 10 are arranged in a mesh structure. Preferably, the shower plates 10 can be designed with 5 layers up and down, or 4 layers or 6 layers, and the specific number is not limited.

[0056] Preferably, the second guide plate 11 is configured as a blade-type guide plate, which can better guide the water flow.

[0057] When the water flows into the double-layer drainage pipe under the pushing action, the water flow is compressed and restricted due to the narrow gap formed between the top of the dissolved oxygen booster and the double-layer drainage pipe. When passing through the dissolved oxygen booster, a larger flow rate is formed, flowing down along the first guide plate 9, and driving the surrounding air to sink rapidly through the air inlet pipe 8. Under the guiding action of the second guide plate 11, the water flow is fully integrated with the air at the bottom end of the air inlet pipe 7; at the same time, the multi-layer mesh rain shower plate 10 has an aeration effect, so that the passing water flow is converted into fine water droplets as much as possible, which further contact and fuse with the air to produce more oxygen, thereby increasing the dissolved oxygen content in the water.

[0058] The dissolved oxygen booster can increase the water flow rate without external power devices, and increases the contact area and time between water and air by physical means, thereby increasing the dissolved oxygen content in the water. It does not require mechanical devices, and uses circulating water to efficiently dissolve oxygen in compressed air, supplying water and oxygen to the aquaculture water body at the same time. It has a simple structure and low cost. At the same time, the installation of the dissolved oxygen booster can also reduce the roaring sound generated when the water flows down, so that the noise problem in the factory area can be alleviated.

[0059] The above-mentioned unpowered dissolved oxygen booster is installed in the inner tube 4 of the double-layer drainage pipe of various breeding tanks 1 and fixed at the water inlet position at the upper end of the double-layer drainage pipe.

[0060] Application scope of the unpowered dissolved oxygen booster: This dissolved oxygen booster can be installed inside the double-layer drainage pipe of the circulating water aquaculture system. By installing this dissolved oxygen booster, the dissolved oxygen content in the circulating water can be increased. For the system of the present invention, the dissolved oxygen content required in the aquaculture process can be met without a power device; and for the common high-level pond aquaculture mode, the dissolved oxygen content can be further increased by using this device, while reducing the number of aerators used and thus reducing costs.

[0061] The above is a description of the implementation of an unpowered dissolved oxygen pressurizing device for an aquaculture system of the present invention. The specific features of the unpowered dissolved oxygen pressurizing device for an aquaculture system of the present invention, such as shape, size and position, can be specifically designed according to the functions of the above-disclosed features, and these designs can be implemented by those skilled in the art. Moreover, the above-disclosed technical features are not limited to the combination with other features disclosed, and those skilled in the art can also make other combinations between the technical features according to the purpose of the present invention, so as to achieve the purpose of the present invention.

Claims

1. A non-powered dissolved oxygen pressurizing device for an aquaculture system, characterized in that: Used to be placed in the drain outlet of aquatic crustacean breeding tanks, including a double-layer drain pipe and a dissolved oxygen booster. The double-layer drainage pipe comprises an outer pipe and an inner pipe, the inner pipe comprises an upper pipe section and a lower pipe section, the upper pipe section and the lower pipe section are movably connected, a plurality of water inlet holes are arranged at the outer bottom of the outer pipe, the upper edge height of the inner pipe is lower than the upper edge height of the outer pipe, the inner pipe is used to control the water level of the breeding tank, and the size of the upper pipe section is designed to be the same as that of the lower pipe section; water flows in from the water inlet holes, and flows up along the inner pipe to the upper edge of the inner pipe, and then flows over the upper edge, and flows downward through the inner pipe to the breeding tank at the lower layer; The dissolved oxygen booster is used to be placed inside the inner tube of the double-layer drainage pipe to increase the dissolved oxygen content of the water body. The dissolved oxygen booster includes a deflector, an air inlet pipe and a first deflector plate. The deflector is arranged at the top, and the deflector is designed to be disc-shaped; The air inlet pipe is fixedly connected to the lower part of the deflector, an air inlet pipe is arranged in the middle of the air inlet pipe, and the air inlet pipe is communicated with the external air; The first guide plate is symmetrically arranged around the air inlet pipe, and is used to guide the water flow to flow down along the inner wall of the inner pipe to the breeding tank at the lower layer.

2. The unpowered dissolved oxygen pressurizing device for an aquaculture system according to claim 1, characterized in that: The inner wall of the inner tube is provided with a second guide plate, which is arranged at the same height as the lower port of the air inlet pipe, so as to make the water flow fully merge with the air at the bottom end of the air inlet pipe.

3. The unpowered dissolved oxygen pressurizing device for an aquaculture system according to claim 2, characterized in that: The inner wall of the inner tube is also provided with a plurality of rain shower plates, which are fixedly arranged in upper and lower layers.

4. The unpowered dissolved oxygen pressurizing device for an aquaculture system according to claim 3, characterized in that: The rain shower plate is configured as a mesh structure.

5. The unpowered dissolved oxygen pressurizing device for an aquaculture system according to claim 1, characterized in that: The first guide plate is a blade-type guide plate.

6. The unpowered dissolved oxygen pressurizing device for an aquaculture system according to claim 5, characterized in that: The number of the blade-type guide plates is four, and the four blade-type guide plates are symmetrically arranged around the air inlet pipe.

7. The unpowered dissolved oxygen pressurizing device for an aquaculture system according to claim 1, characterized in that: The dissolved oxygen booster is designed to be a conical structure in appearance.

8. The unpowered dissolved oxygen pressurizing device for an aquaculture system according to claim 1, characterized in that: The deflector has an angle of 30 degrees with the horizontal direction.

9. The unpowered dissolved oxygen pressurizing device for an aquaculture system according to claim 2, characterized in that: The second guide plate is configured as a blade-type guide plate.

10. The unpowered dissolved oxygen pressurizing device for an aquaculture system according to claim 1, characterized in that: The upper pipeline and the lower pipeline are connected via a threaded connection or a threaded joint.

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