Multi-channel drop water oxygenation device for running water culture

Abstract

The utility model relates to a multi-channel water drop oxygenation device for running water culture, which comprises a multi-stage step body and water separation blocks, the multi-stage step body is composed of a plurality of stages of step single bodies, a plurality of water separation blocks are fixed at the front end part of the top surface of each stage of step single body, and a water drop channel is formed between the adjacent water separation blocks on each stage of step single body. The device is simple in structure, convenient to manage and maintain, low in cost and capable of effectively improving the yield of cultured aquatic products. According to the utility model, the purpose of increasing dissolved oxygen is realized by mainly utilizing the terrain fall and increasing the contact area and contact time with air in the flowing water process, so that the trouble of configuring equipment is avoided. And the stage number of the step single bodies can be designed according to the height of the breeding water inlet according to local conditions. The device is especially suitable for running water breeding modes with terrain fall and difficult circuit erection and pipeline maintenance in mountainous areas and the like.

Description

Technical Field

[0001] This utility model belongs to the field of pond ecological aquaculture technology, and specifically discloses a multi-channel cascading aeration device for flowing water aquaculture. Background Technology

[0002] Dissolved oxygen (DO) refers to elemental oxygen (O2) dissolved in water in a molecular state (generally measured in mg / L). As the most critical water quality indicator in ponds, it not only provides the oxygen necessary for the life activities of farmed animals but also promotes the growth and reproduction of aerobic microorganisms, accelerates the degradation of organic matter, reduces the effects of toxic and harmful substances, and inhibits the activity of harmful anaerobic microorganisms. In aquaculture, ensuring sufficient dissolved oxygen helps farmed animals improve the digestion and absorption of nutrients, accelerates growth, enhances their tolerance to other adverse environmental factors (such as ammonia nitrogen and nitrite), and strengthens their resistance to environmental stress. When the dissolved oxygen concentration in the water is insufficient, fish and other aquatic organisms are in a hypoxic environment, leading to restricted growth, decreased immune function, and even death. Low dissolved oxygen also promotes the production of harmful substances such as ammonia nitrogen, nitrite, and hydrogen sulfide in the pond water and increases their toxicity, which can cause mass mortality of aquatic organisms in severe cases. In addition, dissolved oxygen can effectively reflect the self-purification capacity of water bodies. A decrease in dissolved oxygen concentration may lead to problems such as eutrophication and organic pollution. Therefore, dissolved oxygen has been listed as one of the important indicators for water quality monitoring.

[0003] In natural environments, water surfaces are in direct contact with air, allowing for free exchange of matter and energy to achieve dissolved oxygen saturation. However, due to the complex ecosystems within aquatic bodies, influenced by biological factors such as photosynthesis and respiration, dissolved oxygen levels deviate from equilibrium concentrations, resulting in uneven spatial and temporal distribution. Common artificial aeration methods include mechanical and chemical aeration. Mechanical aeration primarily involves adding fresh water to the aquaculture water body using pumps while simultaneously increasing oxygen levels, or mechanically agitating the water to increase contact between the water and air and accelerate oxygen dissolution. However, this method requires high initial costs for circuitry and emergency generators, and the wiring and equipment are prone to damage, necessitating regular maintenance and increasing long-term costs. Furthermore, mechanical aeration is often localized, and the noise from mechanical operation can negatively impact aquatic animal growth. Chemical aeration, on the other hand, mainly uses oxygen-producing chemicals (such as sodium percarbonate, calcium peroxide, and hydrogen peroxide) to increase the dissolved oxygen content in the water. It is generally used as an emergency measure when there is difficulty in connecting to electricity or when fish are surfacing acutely. It has a rapid oxygenation effect, but the dosage is large and it is not suitable for storage. Excessive use can easily harm aquatic animals. It should not be used during the rearing of fish fry to prevent the occurrence of gas bubble disease.

[0004] Due to the influence of terrain and environment, pond aquaculture in mountainous areas is mostly flow-through aquaculture, which makes the installation of electrical circuits and maintenance of pipelines more difficult. Traditional pond aeration methods cannot be used. It is necessary to develop aquaculture aeration methods that are low in investment, low in operating costs, small in land area, and easy to manage and maintain, based on the characteristics of flow-through pond aquaculture in mountainous areas and in combination with the terrain and landforms, so as to promote the growth of aquatic products and protect the natural aquatic environment. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a multi-channel cascading aeration device for flowing water aquaculture. It has a simple structure, is easy to manage and maintain, and is inexpensive. It can provide sufficient oxygen for farmed fish and can completely replace the use of aerators.

[0006] According to the technical solution provided by this utility model, the multi-channel cascading aeration device for flowing water aquaculture includes a multi-stage stepped body and water-blocking blocks. The multi-stage stepped body is composed of several stepped units. Several water-blocking blocks are fixed at the front end of the top of each stepped unit, and a cascading channel is formed between adjacent water-blocking blocks on each stepped unit.

[0007] As a preferred option, the water-blocking blocks on adjacent steps are staggered.

[0008] Preferably, the top surface of the step unit is a concave arc surface, and the height of the front end of the top surface of the step unit is higher than the height of the rear end of its top surface.

[0009] Preferably, the water-blocking block is in the shape of a vertical triangular prism, with one edge of the water-blocking block facing the top surface of the step unit, and the other two edges of the water-blocking block facing the front two sides of the top surface of the step unit.

[0010] Preferably, the water-stopping block is cubic in shape, and pebbles are fixed on the top surface of the step unit on the outer side of the corresponding water-stopping block.

[0011] Preferably, the height A of the multi-level step body is 60-120cm, the width B is 100-200cm, and the length C is 60-80cm, and the height D of each step on the multi-level step body is 20-30cm and the width E is 40-50cm.

[0012] Preferably, the multi-level step body is made of concrete or stainless steel.

[0013] Preferably, the bottom side length H of the water-blocking block is 4-6cm and the height G of the water-blocking block is 8-12cm.

[0014] Preferably, the width I of the front end of the water drop channel is 15-20cm.

[0015] This utility model has the following advantages:

[0016] 1. This utility model has a simple structure, is easy to manage and maintain, and has low cost, which can effectively increase the yield of farmed aquatic products.

[0017] 2. This utility model primarily utilizes the elevation difference to increase the contact area and time between the water and air during the flow process, thereby increasing dissolved oxygen levels. Therefore, it eliminates the need for additional equipment. Furthermore, the number of steps in each unit can be designed according to the height of the aquaculture inlet, adapting to local conditions. It is particularly suitable for flow-through aquaculture systems in mountainous areas where elevation differences exist and where electrical wiring and pipe maintenance are difficult. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the water-blocking block in Embodiment 1 of this utility model.

[0020] Figure 3 This is a structural schematic diagram of Embodiment 2 of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the water-blocking block in Embodiment 2 of this utility model. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Example 1

[0024] A multi-channel cascading aeration device for flowing water aquaculture, such as Figure 1 and Figure 2 As shown, it includes a multi-level stepped body 1 and water-blocking blocks 2. The multi-level stepped body 1 is composed of several stepped units. Several water-blocking blocks 2 are fixed at the front end of the top of each stepped unit. A water-falling channel is formed between adjacent water-blocking blocks 2 on each stepped unit.

[0025] The water-blocking blocks 2 on the adjacent two steps are staggered.

[0026] The top surface of the step unit is a concave arc surface, and the height of the front end of the top surface of the step unit is higher than the height of the rear end of its top surface.

[0027] The water-blocking block 2 is a vertical triangular prism, with one edge of the water-blocking block 2 facing the top surface of the step unit, and the other two edges of the water-blocking block 2 facing the front two sides of the top surface of the step unit.

[0028] The height A of the multi-level step body 1 is 60-120cm, the width B is 100-200cm, and the length C is 60-80cm. The height D of each step on the multi-level step body 1 is 20-30cm and the width E is 40-50cm.

[0029] The multi-level step body 1 is made of either concrete or stainless steel. If the multi-level step body 1 is made of concrete, it can be temporarily excavated and poured at the inlet of the aquaculture pond; if the multi-level step body 1 is made of stainless steel, it can be processed in a factory according to its dimensions before being put into use.

[0030] The bottom side length H of the water-blocking block 2 is 4-6cm, and the height G of the water-blocking block 2 is 8-12cm.

[0031] The width I at the front end of the drop channel is 15-20cm.

[0032] In actual use, the multi-channel cascading aeration device for flowing water aquaculture in Example 1 forms multiple streams of water under the separation effect of the water-blocking block 2, which increases the flow velocity. The high-velocity water flows down from the cascading channel and impacts the concave arc surface of the step unit, increasing the impact area of ​​the water flow from top to bottom. During the falling impact, the water flows along the concave arc surface, enveloping air and greatly increasing the dissolved oxygen content in the water, thus achieving the purpose of fully increasing the dissolved oxygen in the water.

[0033] Example 2

[0034] A multi-channel cascading aeration device for flowing water aquaculture, such as Figure 3 and Figure 4 As shown, it includes a multi-level stepped body 1 and water-blocking blocks 2. The multi-level stepped body 1 is composed of several stepped units. Several water-blocking blocks 2 are fixed at the front end of the top of each stepped unit. A water-falling channel is formed between adjacent water-blocking blocks 2 on each stepped unit.

[0035] The water-blocking blocks 2 on the adjacent two steps are staggered.

[0036] The water-blocking block 2 is cubic in shape, and pebbles 3 are fixed on the top surface of the step unit on the outer side of the corresponding water-blocking block 2.

[0037] The height A of the multi-level step body 1 is 60-120cm, the width B is 100-200cm, and the length C is 60-80cm. The height D of each step on the multi-level step body 1 is 20-30cm and the width E is 40-50cm.

[0038] The multi-level step body 1 is made of either concrete or stainless steel. If the multi-level step body 1 is made of concrete, it can be temporarily excavated and poured at the inlet of the aquaculture pond; if the multi-level step body 1 is made of stainless steel, it can be processed in a factory according to its dimensions before being put into use.

[0039] The bottom side length H of the water-blocking block 2 is 4-6cm, and the height G of the water-blocking block 2 is 8-12cm.

[0040] The width I at the front end of the drop channel is 15-20cm.

[0041] In actual use, the multi-channel cascading aeration device for flowing water aquaculture in Example 2 forms multiple streams of water under the separation effect of the water-blocking block 2, which increases the flow velocity. The high-velocity water flows fall from the cascading channel and impact the pebbles 3 fixed on the top surface of the step unit, increasing the impact area of ​​the water flow from top to bottom. This not only increases the contact area with air, but also forms many fine bubbles, which greatly increases the dissolved oxygen content in the water, thus achieving the purpose of fully increasing the dissolved oxygen in the water.

[0042] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A multi-channel cascading aeration device for flowing water aquaculture, characterized by: It includes a multi-level step body (1) and water-blocking blocks (2). The multi-level step body (1) is composed of several step units. Several water-blocking blocks (2) are fixed at the front end of the top of each step unit. A water-falling channel is formed between adjacent water-blocking blocks (2) on each step unit.

2. The multi-channel cascading aeration device for flow-through aquaculture as described in claim 1, characterized in that: The water-blocking blocks (2) on the adjacent two steps are staggered.

3. The multi-channel cascading aeration device for flow-through aquaculture as described in claim 2, characterized in that: The top surface of the step unit is a concave arc surface, and the height of the front end of the top surface of the step unit is higher than the height of the rear end of its top surface.

4. The multi-channel cascading aeration device for flow-through aquaculture as described in claim 3, characterized in that: The water-blocking block (2) is a vertical triangular prism, with one edge of the water-blocking block (2) facing the top surface of the step unit, and the other two edges of the water-blocking block (2) facing the front two sides of the top surface of the step unit.

5. The multi-channel cascading aeration device for flow-through aquaculture as described in claim 2, characterized in that: The water-blocking block (2) is cubic in shape, and pebbles (3) are fixed on the top surface of the step unit on the outer side of the corresponding water-blocking block (2).

6. The multi-channel cascading aeration device for flow-through aquaculture as described in any one of claims 1-5, characterized in that: The height A of the multi-level step body (1) is 60-120cm, the width B is 100-200cm, and the length C is 60-80cm. The height D of each step on the multi-level step body (1) is 20-30cm and the width E is 40-50cm.

7. The multi-channel cascading aeration device for flow-through aquaculture as described in claim 6, characterized in that: The material of the multi-level step body (1) is concrete or stainless steel.

8. The multi-channel cascading aeration device for flow-through aquaculture as described in claim 4 or 5, characterized in that: The bottom side length H of the water-blocking block (2) is 4-6cm, and the height G of the water-blocking block (2) is 8-12cm.

9. The multi-channel cascading aeration device for flow-through aquaculture as described in claim 1, characterized in that: The width I at the front end of the drop channel is 15-20cm.

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