Fresh water culture pond oxygenation device

Abstract

The embodiment of the utility model provides a fresh water culture pond oxygen increasing device which comprises an oxygen increasing device shell, a water inlet, a water outlet, a water inlet and a water outlet. The impeller is arranged in the aerator shell and is used for stirring water flow and generating bubbles so as to increase dissolved oxygen in water; the impeller protective cover covers the outside of the impeller and is provided with a plurality of groups of small holes which are uniformly distributed, the diameter of the small holes is smaller than the size of normal algae so as to prevent the algae from entering, a cleaning nozzle is arranged at the top of the impeller protective cover, and the cleaning nozzle periodically sprays water flow to the inner side of the impeller protective cover through an external water source. Accumulated dirt can be removed; the flow guide pipe is connected with the water inlet and the water outlet of the aerator shell and is used for guiding water flow to pass through the impeller; and the cleaning brush is arranged on the inner side of the impeller protective cover. Through the scheme of the embodiment of the invention, the problems that the equipment operation efficiency is reduced and the energy consumption is increased can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aquaculture equipment, in particular to a freshwater aquaculture pond oxygenation device. BACKGROUND

[0002] The freshwater aquaculture pond oxygenation device is mainly used to supplement oxygen to the aquaculture pond to ensure the healthy growth of aquatic organisms. It usually improves the water oxygen content through mechanical agitation or gas exchange. However, in actual use, the device may have problems such as reduced equipment operation efficiency and increased energy consumption, which may be related to factors such as component wear caused by long-term operation of the device, changes in water resistance, or unreasonable energy utilization, thereby affecting the oxygenation effect and increasing operating costs. SUMMARY

[0003] Therefore, the present application provides a freshwater aquaculture pond oxygenation device to at least partially solve the problems in the prior art.

[0004] The freshwater aquaculture pond oxygenation device of the present application comprises:

[0005] An oxygenator shell is provided with a water inlet and a water outlet;

[0006] An impeller is arranged inside the oxygenator shell for stirring the water flow and generating bubbles to increase the dissolved oxygen in the water;

[0007] An impeller protective cover is arranged outside the impeller and is provided with a plurality of uniformly distributed small holes, the diameter of the small holes is smaller than the size of the algae to prevent the algae from entering, and the top of the impeller protective cover is provided with a cleaning nozzle which is connected to a water source and periodically sprays water flow inside the impeller protective cover to remove accumulated dirt;

[0008] A flow guide pipe is connected to the water inlet and the water outlet of the oxygenator shell for guiding the water flow through the impeller;

[0009] A cleaning brush is arranged inside the impeller protective cover, the cleaning brush is in contact with the impeller, and the cleaning brush is moved by the rotation of the impeller to scrape off the dirt on the inside of the impeller protective cover and the surface of the impeller,

[0010] Wherein, the bristles of the cleaning brush are made of flexible material; the inner wall of the flow guide pipe is provided with a spiral thread to enhance the rotation and disturbance of the water flow.

[0011] According to one embodiment, the impeller has a plurality of curved blades, and the bending angle of the blades is 15°-30° to optimize the water flow path and improve the oxygen dissolution efficiency.

[0012] According to one embodiment, the shaft of the impeller is provided with a rotating bearing, which is designed as a waterproof seal to prevent water from entering the rotating bearing and affecting the smoothness of the rotation of the impeller, thereby prolonging the service life of the impeller.

[0013] According to one embodiment, the water inlet of the flow guide pipe is provided with a pre-filter screen with a mesh diameter less than 1mm to block particles with a diameter greater than 1mm from entering, thereby protecting the impeller and the impeller guard from wear.

[0014] According to one embodiment, the length of the cleaning brush is 2-3mm shorter than the thickness of the impeller guard, so that the cleaning brush can rotate with the impeller without causing excessive wear.

[0015] According to one embodiment, the top end of the bristles of the cleaning brush is rounded to avoid scratching the inner surface of the impeller guard.

[0016] According to one embodiment, a flow regulating valve is arranged between the water inlet and the water outlet of the aerator housing, which can adjust the flow size to meet the needs of different aquaculture ponds.

[0017] According to one embodiment, a temperature sensor is arranged inside the aerator housing to monitor the water temperature.

[0018] According to one embodiment, the bottom of the aerator housing is provided with support feet, and the height of the support feet keeps the aerator device away from the bottom of the pond to avoid sediment being sucked into the device.

[0019] According to one embodiment, a buffer washer is arranged between the impeller and the flow guide pipe to reduce the impact of water flow and increase the stability of the device.

[0020] According to one embodiment, the inner diameter of the flow guide pipe is 5%-10% larger than the outer diameter of the impeller guard to provide sufficient space for smooth water flow and avoid water flow due to narrow channel.

[0021] The embodiment of the present disclosure provides a fresh water aquaculture pond oxygenation device, which comprises: an oxygenator shell, a water inlet and a water outlet are arranged on the oxygenator shell; an impeller is arranged in the oxygenator shell and is used for stirring water flow and generating bubbles to increase dissolved oxygen in water; an impeller protective cover is arranged outside the impeller and is provided with a plurality of uniformly distributed small holes, the diameter of the small holes is smaller than the size of common water algae, so that the water algae is prevented from entering, a cleaning nozzle is arranged at the top of the impeller protective cover, the cleaning nozzle is connected with a water source, and water flow is periodically sprayed to the inside of the impeller protective cover to remove accumulated dirt; a flow guide pipe is connected with the water inlet and the water outlet of the oxygenator shell and is used for guiding water flow to pass through the impeller; a cleaning brush is arranged on the inside of the impeller protective cover, the cleaning brush is in contact with the impeller, the cleaning brush is driven to move by the rotation of the impeller to scrape off dirt on the inside of the impeller protective cover and the surface of the impeller, wherein the bristles of the cleaning brush are made of flexible material; and the inner wall of the flow guide pipe is provided with spiral lines to enhance the rotation and disturbance of water flow. Through the scheme of the embodiment of the present disclosure, the problem of how to solve the decrease of equipment operation efficiency and the increase of energy consumption can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In the drawings, like reference numbers in the drawings and consistent throughout the several views represent the same or similar components or elements. The drawings are not necessarily to scale. It should be understood that the drawings merely depict some embodiments consistent with the disclosure and should not be considered to be limiting of the scope of the disclosure.

[0023] Figure 1 It is an oxygenation device shaft side structure schematic view of the utility model;

[0024] Figure 2 It is an oxygenation device explosion structure schematic view of the utility model; Figure 1

[0025] Figure 3 It is an oxygenator shell enlarged view of the utility model; Figure 2

[0026] Figure 4 It is an impeller enlarged view of the utility model; Figure 1

[0027] In the drawing: 1, oxygenator shell; 2, impeller; 3, impeller protective cover; 4, flow guide pipe; 5, cleaning brush; 6, rotary bearing; 7, cleaning nozzle; 8, pre-filter screen; 9, flow regulating valve; 10, temperature sensor; 11, support foot; 12, buffer washer DETAILED DESCRIPTION

[0028] ​​​In the following, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and description are considered to be exemplary in nature and not limiting.

[0029] As Figure 1 and Figure 2 shown, a freshwater aquaculture pond oxygenation device of the present application includes an oxygenator housing 1, an impeller 2, an impeller protective cover 3, a flow guide pipe 4, and a cleaning brush 5, and other components. Each component works together to solve the technical problems of equipment operation efficiency decline and energy consumption increase, and optimize the dissolved oxygen replenishment efficiency in the freshwater aquaculture pond.

[0030] The oxygenator housing 1 is the main frame structure of the device, used to accommodate and protect other components. It is provided with a water inlet and a water outlet, respectively connected to the external water area and the internal water flow channel, to realize the introduction and discharge of water. The housing is usually made of high-strength metal material or corrosion-resistant plastic, which has good corrosion resistance while ensuring structural strength. The design of the housing needs to determine the specific size and material selection according to the actual application scene, for example, in high-salinity areas, stainless steel material can be selected to reduce the corrosion problem of the housing caused by salt.

[0031] The impeller 2 is located inside the oxygenator housing 1 and is the core component of the device, which plays a role in stirring the water flow and generating bubbles to increase the dissolved oxygen content in the water. The impeller 2 is composed of multiple blades, usually made of lightweight aluminum alloy or engineering plastic, which not only ensures strength but also reduces the overall weight of the device. Its specific installation method can adopt a motor-driven shaft connection form, and the impeller 2 is directly assembled on the motor shaft end and fixed through the key groove, to ensure the transmission of torque and no risk of sliding off during rotation.

[0032] The impeller protective cover 3 covers the outside of the impeller 2, aiming to protect the impeller 2 from water algae and other contaminants. Its main feature is that it is made of corrosion-resistant stainless steel material, with uniformly distributed small holes on the surface. The small holes have a diameter smaller than the size of common water algae or other particulate matter, effectively preventing them from entering the inside of the protective cover and avoiding clogging and damaging the impeller 2. The protective cover can be fixed to the inner wall of the oxygenator housing 1 by welding or bolts, etc. In addition, to improve the service life, the outer layer of the protective cover can be electroplated or coated to enhance the weather resistance.

[0033] The guide pipe 4 is a crucial functional component of the aerator housing 1, connecting the inlet and outlet of the device. Its function is to guide water flow along a predetermined path through the impeller 2, creating a stable flow environment. In practical implementation, the guide pipe 4 can be designed with an inner wall spiral pattern to enhance water rotation and turbulence. This design significantly improves flow field characteristics and prevents algae from adhering to the inner wall. The specific depth and pitch of the spiral pattern need to be determined through experimental optimization to achieve optimal fluid flow performance.

[0034] The cleaning brush 5 is an auxiliary component, installed inside the impeller guard 3 and in contact with the impeller 2. The main function of the cleaning brush 5 is to be driven by the rotation of the impeller 2, simultaneously scraping away dirt adhering to the impeller 2 and the inner wall of the guard. Its bristles are made of a flexible material, combining elasticity and wear resistance, enabling it to maintain its cleaning ability even after prolonged operation. Technically, the brush head of the cleaning brush 5 can be fixed to the guard via a snap-fit ​​structure, ensuring a reliable connection while facilitating disassembly and maintenance.

[0035] To address the issues of declining equipment operating efficiency and increased energy consumption, the aforementioned features propose multiple solutions: First, the impeller guard 3 and its perforated design effectively prevent algae and debris from clogging the impeller 2, ensuring its continuous and normal rotation and maintaining a stable aeration effect. Second, the spiral pattern on the inner wall of the guide pipe 4 improves the efficiency of water circulation and diffusion, reducing energy waste. Finally, the cleaning brush 5, with its automatic cleaning function of the impeller 2, further slows down the rate of scaling inside the device, avoiding increased power consumption due to increased friction. Therefore, the comprehensive application of these technologies significantly improves the durability and energy efficiency of the aeration device.

[0036] like Figure 4 As shown, in one embodiment, the impeller 2 of the freshwater aeration device for aquaculture ponds according to this application has multiple curved blades, each designed with a specific curvature angle ranging from 15° to 30°. These blades are not arranged horizontally, but are precisely calculated to optimize the water flow path and reduce water resistance. Furthermore, the impeller 2 is located inside the aerator housing 1, tightly connected to the water flow channel formed by the guide pipe 4, allowing sufficient turbulence and air bubbles to be carried into the water as the water flows through the impeller 2. An impeller protective cover 3 is also provided on the outside of the impeller 2 for protection, ensuring that only water of appropriate diameter can pass through.

[0037] Specifically, the structure of the multi-piece curved blade is achieved through precise manufacturing, such as mold casting or laser cutting technology to form a unified angle standard. The center of the impeller 2 is connected to the power equipment through a rotating shaft and is fixed at the center of the oxygenator shell 1, ensuring stable operation while facilitating installation and disassembly. At the same time, the design of the curved blade allows the water flow to be more evenly distributed under the action of centrifugal force, thereby promoting the dissolution of oxygen in water. The way the entire component is fitted embodies the concept of modular assembly, further simplifying the assembly process.

[0038] In one embodiment, the impeller 2 of the freshwater aquaculture pond oxygenation device of the present application is ensured to operate stably and reliably by the specific structure installed at the center position. Specifically, the shaft center position of the impeller 2 is provided with a rotating bearing 6 with a special waterproof sealing design. Through this design, it can effectively prevent external water from penetrating into the bearing, thereby avoiding the problem of reduced smoothness of the impeller 2 rotation or shortened service life due to water intrusion. At the same time, the rotating bearing 6 is precisely embedded in the center position of the impeller 2 during assembly to ensure stable cooperation between it and the impeller 2.

[0039] For example, a special rotating bearing 6 with double waterproof structure can be selected. The outer part of the bearing is provided with an elastic sealing ring, and the inner part is sealed again by a precise metal end cap. During installation, the bearing is integrally pressed into the center position of the impeller 2, and the outer ring is fixed, while the inner ring rotates with the impeller 2 to work. In addition, the rolling elements inside the bearing are provided with appropriate axial force by the pre-tightening spring assembly, so as to ensure that they do not loosen or jam in a long-term high-efficiency operating state.

[0040] As shown in Figure 2 and Figure 4 In one embodiment, the impeller guard 3 of the freshwater aquaculture pond oxygenation device of the present application is provided with a cleaning nozzle 7 at the top, which is connected to an external water source and periodically sprays water during the operation of the oxygenation device, thereby cleaning the inner surface of the impeller guard 3 and preventing dirt accumulation. The position of the cleaning nozzle 7 is designed reasonably, which can cover most of the inner area of the impeller guard 3, effectively removing possible attached algae or other debris. The working frequency of the cleaning nozzle 7 can be adjusted by the control system to meet the needs of different water quality environments. Specifically, the installation method of the cleaning nozzle 7 can be threaded connection or quick buckle fixation, ensuring convenient replacement or maintenance when needed.

[0041] For example, the cleaning nozzle 7 can be connected to a water source through a separate pipeline, which is equipped with an electromagnetic valve for controlling the time and duration of water flow release. The water outlet direction of the cleaning nozzle 7 is at an angle to the inner wall of the impeller guard 3, so that the sprayed water flow can efficiently impact the internal deposits and be discharged with the draft tube 4, completing the cleaning process while avoiding contamination of other structures inside the device. The design of the cleaning nozzle 7 is simple, mainly including a water outlet and a shell part for stable fixation, and the material is selected to be corrosion-resistant to prolong the service life.

[0042] As shown in Figure 1 and Figure 2 , in one embodiment, the draft tube 4 inlet of the freshwater aquaculture pond oxygenation device of the present application is provided with a pre-filtering screen 8, which can effectively prevent larger particles from entering the device. The pre-filtering screen 8 is installed at the water inlet end of the draft tube 4 and closely adheres to the draft tube 4, covering the water inlet area completely to ensure that the water flow is filtered when passing through. Specifically, the pre-filtering screen 8 is made of high-precision metal or polymer material, and its structure has fine and uniform distribution of mesh holes, each mesh hole having a diameter of less than 1 mm, which can reliably block larger suspended particles, undecomposed residual feed and impurities in the water body.

[0043] For example, the pre-filtering screen 8 can be installed on the draft tube 4 by screwing or clamping, ensuring that the connection is not easy to fall off and has good sealing performance, thereby avoiding the infiltration of impurities from the edge. At the same time, the installation form of the pre-filtering screen 8 also facilitates subsequent disassembly and cleaning, providing maintenance convenience for users. Specifically, the design of this component takes into account the protection function and actual operation demand, effectively protecting the core components of the oxygenator such as the impeller 2 and the impeller guard 3 from wear or blockage by foreign substances.

[0044] As shown in Figure 2 , in one embodiment, the length of the cleaning brush 5 of the freshwater aquaculture pond oxygenation device of the present application has a precise distance difference design with the thickness of the impeller guard 3. Specifically, the total length of the cleaning brush 5 is 2 to 3 mm shorter than the thickness of the impeller guard 3, which ensures that the cleaning brush 5 can effectively remove dirt inside the impeller guard 3, while avoiding unnecessary mechanical wear on the inner wall of the impeller guard 3 or the impeller 2. By adjusting the specific installation position of the cleaning brush 5 and its structure size, it can both follow the movement during the rotation of the impeller 2 and maintain moderate working pressure to maintain high cleaning efficiency.

[0045] For example, the cleaning brush 5 can be installed inside the impeller guard 3 near the area of the impeller 2 by a flexible fixing mechanism. This installation form allows the cleaning brush 5 to swing naturally with the rotation of the impeller 2, adapting to the cleaning needs under different water flow conditions. In order to achieve the above size requirements, the thickness of the impeller guard 3 can be measured first, and then the material and manufacturing process of the cleaning brush 5 that meets the specifications can be selected to ensure that the gap after assembly is controlled within the predetermined range. In addition, the relative movement design between components combined with the selection of the material of the cleaning brush 5 ensures the reliability and long-term usability of the entire system.

[0046] As shown in Figure 4 In one embodiment, the cleaning brush 5 of the freshwater aquaculture pond oxygenation device of the present application is optimized in terms of material and structural design to meet the actual operation requirements. The bristles of the cleaning brush 5 in the device are made of nylon material, which is an engineering material with excellent strength and wear resistance, capable of maintaining stable performance in complex water environments. In order to prevent the bristles of the cleaning brush 5 from causing scratches or damage to the inner surface of the impeller guard 3 during contact, the ends of the bristles are specially rounded. This design not only avoids damage caused by hard scratches, but also ensures that the impeller guard 3 can maintain its complete surface state after long-term use.

[0047] Further, the cleaning brush 5 is installed inside the impeller guard 3 and arranged closely so that it can cover the area of dirt distribution caused by the rotation of the impeller 2. In terms of specific structure, the cleaning brush 5 is fixed to the specified position by a flexible connection, so that its bristles are always close to and act on the inner surface of the impeller guard 3 and the part adjacent to the impeller 2. This installation form allows the rotation of the impeller 2 to drive the bristles of the cleaning brush 5 to move, and synchronously realizes the cleaning function without additional power system.

[0048] For example, the technical requirements can be met by selecting appropriate bristle diameter, length and elasticity parameters. After adjusting the bristle density to a moderate range, inserting it into a specially designed bracket and bonding it with strong glue, then embedding it as a whole into the predetermined slot, and ensuring that the tip does not interfere with the inner surface of the impeller guard 3, a good fit state is formed. At the same time, in order to adapt to different water environments, the nylon material can also be modified according to the degree of corrosion.

[0049] As shown in Figure 2 and Figure 3As shown, in one embodiment, a flow regulating valve 9 is arranged between the water inlet and outlet of the oxygenator housing 1 of the freshwater aquaculture pond oxygenation device. This component precisely regulates the inflow and outflow of water flow, adapts to different aquaculture environment requirements, and reduces energy consumption. The specific installation position of the flow regulating valve 9 is on the flow channel between the water inlet and outlet, directly embedded in the space reserved on the inner wall of the oxygenator housing 1, and forms a sealed connection with the housing. The flow regulating valve 9 is composed of a valve body, an adjusting knob, and a control valve core. The valve body is fixed on both sides of the flow channel and connected to the housing by threads or buckles. The control valve core is located at the center of the valve body and moves axially under the drive of the adjusting knob to adjust the flow area.

[0050] Specifically, when the flow regulating function is implemented, for example, the adjusting knob rotates and pushes the control valve core forward through the linkage mechanism, then the valve opening degree decreases; when the reverse operation is performed, the opening degree increases. This process can be completed by designing a tapered structure at the end of the valve core, which gradually changes the flow area matched with the flow hole diameter in the valve body, thereby effectively achieving the control requirements of different water flow states. The entire assembly is tightly installed and ensures water tightness, ensuring reliable operation of the equipment while flexibly adapting to various actual demand conditions during the oxygenation process.

[0051] As shown, Figure 3 In one embodiment, a temperature sensor 10 is arranged inside the oxygenator housing 1 of the freshwater aquaculture pond oxygenation device. The installation position is selected near the water flow path of the oxygenator, which can accurately monitor the temperature of the water passing through the device. The temperature sensor 10 is preferably a high-precision resistance sensor or a thermocouple sensor, which can quickly respond to temperature changes and output an electrical signal. It has a direct electrical connection with the core components of the oxygenation device, such as through a control circuit to transmit signals, thereby realizing real-time monitoring of water temperature.

[0052] In order to ensure that the operating parameters can be dynamically adjusted according to the temperature, a logic controller can be set in combination with the driving system to achieve this goal. Specifically, the temperature sensor 10 captures signals and transmits them to the controller for judgment and processing, and adjusts the parameters such as the speed of the impeller 2 or the start-stop state according to the preset program to adapt to specific environmental requirements. For example, when the water temperature approaches or exceeds the set safety threshold range, the logic controller will send instructions to the motor to adjust the input current, thereby changing the power output, protecting the equipment components from the adverse effects of high or low water temperature. This technical means is based on mature feedback control systems.

[0053] As shown, Figure 3As shown, in one embodiment, the aerator housing 1 of the freshwater aeration device of this application is provided with a support foot 11 at the bottom, the installation position of which ensures that there is a certain distance between the aeration device and the bottom of the pond. This design, through a reasonable structural layout, prevents sediment from the bottom of the pond from being sucked into the device, thereby reducing the risk of equipment damage or blockage caused by the entry of dirt. The support foot 11 is made of a material with sufficient strength and stability, which can stably support the entire aeration device. At the same time, to ensure structural reliability, the support foot 11 is firmly connected to the aerator housing 1, such as by welding or threaded fixing. Under specific conditions, the height of the support foot 11 can be adjusted according to actual application needs to adapt to aquaculture ponds of different depths and bottom conditions.

[0054] For example, stainless steel can be chosen to make the support feet 11, and they can be designed as cylindrical or polygonal columns to provide stable support while minimizing the impact on water flow. Specifically, the distance between the aerator housing 1 and the bottom of the pool can be controlled by adjusting the length of the support feet 11 or by setting adjustable supports, thereby optimizing the overall performance of the device.

[0055] like Figure 4 As shown, in one embodiment, a buffer washer 12 is provided between the impeller 2 and the guide pipe 4 of the freshwater aeration device of this application. By reasonably selecting the material and adjusting the installation method, the impact force of the water flow and the noise and vibration are effectively reduced. Specifically, the buffer washer 12 is located near the outlet of the end of the guide pipe 4 and directly contacts the area where the impeller 2 is located. Its structure is made of flexible water-resistant material with appropriate thickness and elasticity, which can effectively disperse the instantaneous impact of the high-speed water flow from inside the guide pipe 4 on the impeller 2. At the same time, the buffer washer 12 maintains an appropriate fit with the guide pipe 4 and the impeller 2, thereby improving the overall operational stability of the aeration device.

[0056] For example, the buffer gasket 12 can be made of materials such as rubber or silicone, and then embedded into the edge of the outlet of the guide pipe 4 in an interference fit. Alternatively, the buffer gasket 12 can be positioned around the key transition area between the two using a fixing ring, thereby ensuring that the gasket can absorb vibration evenly and reduce sound propagation during water flow.

[0057] like Figure 4As shown, in one embodiment, the inner diameter of the flow guide pipe 4 and the outer diameter of the impeller protection cover 3 of the freshwater aquaculture pond oxygenation device of the present application have a certain proportional relationship, that is, the inner diameter of the flow guide pipe 4 is 5% to 10% larger than the outer diameter of the impeller protection cover 3. Such a design can ensure smooth flow of water in the gap formed between the two, while also effectively avoiding the problem of dirt accumulation and water flow obstruction caused by too narrow a space. By precisely controlling the size of the two components, the fluid dynamic performance of the overall device is further optimized. This proportional relationship is verified by strict experimental data to ensure that the hydraulic efficiency is not reduced due to the flow guide pipe 4 being too large, and that there are no hidden dangers in actual operation due to insufficient space.

[0058] For example, in a specific manufacturing process, this feature can be achieved through mold casting or precision machining. Specifically, the maximum outer diameter of the impeller protection cover 3 is first determined, and then the inner diameter of the flow guide pipe 4 is adjusted by 5% to 10% of this value. During assembly, the impeller protection cover 3 is fixed in a designated position within the oxygenator housing 1, and then the flow guide pipe 4 with the precise inner diameter is tightly connected to the inlet and outlet of the housing, thereby forming a coordinated flow channel system.

[0059] In actual operation, when the device is in use, water flows into the flow guide pipe 4 through the water inlet of the oxygenator housing 1. Under the action of the spiral pattern of the flow guide pipe 4, the water flow forms a rotating flow, and then the water flow enters the area where the impeller 2 is located. The impeller 2 is driven to rotate by an external power source to stir the water flow and generate bubbles, thereby increasing the dissolved oxygen content in the water. Some of the dirt and algae in the water flow are blocked by the impeller protection cover 3, preventing direct contact with the impeller 2. The cleaning brush 5 is in contact with the impeller 2 while the impeller 2 is rotating, and the flexible bristles of the cleaning brush 5 remove any dirt that may be attached to the inside of the impeller protection cover 3 and the surface of the impeller 2, ensuring the normal operation and long-term cleaning of the impeller 2. Finally, the water treated by the oxygenation process flows out of the water outlet of the oxygenator housing 1, completing the entire oxygenation process.

[0060] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0061] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various changes or replacements within the technical range disclosed by the present application, and these should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An oxygenation device for a freshwater aquaculture pond, characterized in that, The application relates to an oxygenator, which comprises the following parts: an oxygenator shell (1) provided with a water inlet and a water outlet; an impeller (2) arranged in the oxygenator shell (1) for stirring water flow and generating bubbles to increase the dissolved oxygen in water; an impeller protective cover (3) covering the impeller (2) and provided with a plurality of uniformly distributed small holes with a diameter smaller than that of algae, so that the algae cannot enter the impeller protective cover (3), and the top of the impeller protective cover (3) is provided with a cleaning nozzle (7) connected to an external water source and periodically spraying water flow to the inside of the impeller protective cover (3) to remove accumulated dirt; a flow guide pipe (4) connecting the water inlet and the water outlet of the oxygenator shell (1) and guiding water flow through the impeller (2); a cleaning brush (5) arranged on the inside of the impeller protective cover (3) and in contact with the impeller (2), so that the cleaning brush (5) is driven to move by the rotation of the impeller (2) to scrape off dirt on the inside of the impeller protective cover (3) and the surface of the impeller (2), wherein the bristles of the cleaning brush (5) are made of flexible material, and the inner wall of the flow guide pipe (4) is provided with spiral threads to enhance the rotation and disturbance of water flow.

2. The oxygenation device for a freshwater aquaculture pond according to claim 1, characterized in that: The impeller (2) has a plurality of curved blades with a bending angle of 15-30 degrees, so that the water flow path is optimized and the oxygen dissolving efficiency is improved.

3. The oxygenation device for a freshwater aquaculture pond of claim 1, wherein: The shaft center of the impeller (2) is provided with a rotating bearing (6) with a waterproof sealing design, so that water cannot enter the rotating bearing (6) to affect the smoothness of the rotation of the impeller (2) and prolong the service life of the impeller (2).

4. The oxygenation device for a freshwater aquaculture pond of claim 1, wherein: The water inlet of the flow guide pipe (4) is provided with a pre-filtering screen (8) with a mesh diameter smaller than 1 mm, so that particles with a diameter larger than 1 mm cannot enter to protect the impeller (2) and the impeller protective cover (3) from being abraded.

5. The oxygenation device for a freshwater aquaculture pond of claim 1, wherein: The length of the cleaning brush (5) is 2-3 mm shorter than the thickness of the impeller protective cover (3), so that the cleaning brush (5) can rotate with the impeller (2) without being excessively abraded.

6. The oxygenation device for a freshwater aquaculture pond of claim 1, wherein: The top end of the bristles of the cleaning brush (5) is rounded to avoid scratching the inner surface of the impeller protective cover (3).

7. The oxygenation device for a freshwater aquaculture pond of claim 1, wherein: The water inlet and the water outlet of the oxygenator shell (1) are provided with a flow adjusting valve (9) to adapt to the needs of different breeding ponds by adjusting the flow size.

8. The oxygenation device for a freshwater aquaculture pond of claim 1, wherein: The oxygenator shell (1) is internally provided with a temperature sensor (10) for monitoring the water temperature.

9. The oxygenation device for a freshwater aquaculture pond of claim 1, wherein: The bottom of the oxygenator shell (1) is provided with supporting feet (11) with a height allowing the oxygenation device to keep a distance from the pond bottom to avoid the pond bottom deposits being sucked into the device.

10. The oxygenation device for a freshwater aquaculture pond of claim 1, wherein: A buffer washer (12) is arranged between the impeller (2) and the flow guide pipe (4) to reduce the water flow impact force and increase the running stability of the device.

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