Spirulina cultivation device with backwashing function

Abstract

The utility model provides a kind of snail breeding equipment with backwashing function, the snail breeding equipment with backwashing function includes breeding box, the bottom plate being arranged in the breeding box, the plurality of drain caps being arranged on the bottom plate, sand material being laid above the drain cap, water supply component, the bottom plate is spaced apart with the bottom of the breeding box, the bottom wall and the side wall of the bottom plate and the breeding box are enclosed to form water supply space, the water inlet end of the drain cap is communicated with water supply space, and the water outlet end of the drain cap is located above the bottom plate. The utility model discloses a kind of snail breeding equipment with backwashing function by setting bottom plate and drain cap on bottom plate, so that it can be realized from bottom to top even washing, eradicate H2S accumulation and make survival rate improve.

Description

Technical Field

[0001] This utility model relates to the field of snail farming technology, specifically to a snail farming device with a backwashing function. Background Technology

[0002] Snail farming, as an important component of aquaculture, has high economic and ecological significance. Traditional snail farming equipment with backwashing functions typically includes a culture tank, a sand bed, and a water supply system, supporting snail growth by simulating a natural environment. In existing technologies, drainage structures are often installed at the bottom of the culture tank to achieve water circulation, but these often employ a top-down water flow method or a simple bottom opening design, making it difficult to achieve uniform water distribution and effective cleaning of the substrate.

[0003] However, traditional snail farming equipment with backwashing function has significant drawbacks: First, the substrate is prone to stagnant water zones due to uneven water flow, leading to hydrogen sulfide (H2S) accumulation and severely impacting snail survival rates. Second, the backwashing system is inefficient, often exhibiting blind spots, and consumes large amounts of water over long periods. Furthermore, the complex external piping structure increases equipment costs and maintenance difficulty. In addition, excessively strong water flow can cause stress in snails, interfering with their normal growth cycle. These problems restrict the large-scale development of snail farming. The purpose of this invention is to overcome the shortcomings of existing technologies and provide a novel snail farming equipment with backwashing function. By optimizing the internal water supply space and drainage cap structure, a uniform water flow distribution from bottom to top is achieved, completely eliminating substrate contamination and backwashing dead zones, while simultaneously reducing system complexity and snail stress, thus improving farming efficiency and survival rates.

[0004] In view of this, it is necessary to improve the existing snail farming equipment with backwashing function in order to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a snail farming device with a backwashing function to solve the problems of substrate contamination, dead cleaning corners, and complex systems that easily cause stress to snails in existing snail farming devices with backwashing functions.

[0006] To achieve the above objectives, this utility model provides a snail farming device with a backwashing function. The snail farming device with a backwashing function includes a farming box, a bottom plate disposed in the farming box, multiple drainage caps disposed on the bottom plate, sand material laid on top of the drainage caps, and a water supply component. The bottom plate is spaced apart from the bottom of the farming box, and the bottom plate, the bottom wall, and the side walls of the farming box form a water supply space. The water inlet end of the drainage cap is connected to the water supply space, and the water outlet end of the drainage cap is located above the bottom plate.

[0007] As a further improvement of this utility model, the snail farming equipment with backwashing function also includes multiple partition plates, which are arranged in the water supply space. The multiple partition plates are spaced apart to divide the water supply space into multiple non-interconnected partition spaces, and each partition space is connected to multiple drain caps.

[0008] As a further improvement of this utility model, the water supply component includes a water supply chamber disposed adjacent to the breeding tank and a water supply main pipe communicating with the water supply chamber, wherein the water supply chamber is communicating with the partition space.

[0009] As a further improvement of this utility model, the side wall of the breeding tank is provided with multiple connecting doors and multiple control valves for controlling the opening and closing of the connecting doors. The control valves are used to control the opening and closing of the connecting doors to control the connection between the partition space and the water supply chamber. Each control valve independently controls one connecting door. The breeding tank has a water inlet state with all connecting doors open and a backwashing state with only one connecting door open. When the breeding tank is in the backwashing state, each connecting door opens in sequence.

[0010] As a further improvement of this utility model, the water supply assembly also includes an inlet pipe and a backwash pipe, both of which are connected to the main water supply pipe.

[0011] As a further improvement of this utility model, the water supply assembly also includes a variable frequency pump connected to the backwash pipe.

[0012] As a further improvement of this utility model, the snail farming equipment with backwashing function also includes a water pressure gauge, which is used to detect the water pressure in the water supply chamber.

[0013] As a further improvement of this utility model, the snail breeding equipment with backwashing function also includes a drainage component. The drainage component includes a drainage plate extending horizontally inward from the side wall of the breeding tank, a baffle plate extending upward from the end of the drainage plate away from the side wall of the breeding tank, and a drainage pipe. The bottom of the drainage plate is provided with a drainage hole, and the drainage pipe communicates with the drainage hole. The drainage pipe is arranged through the side wall of the breeding tank.

[0014] As a further improvement of this utility model, the drainage plate and the baffle plate surround the side wall of the breeding box, and the number of drainage holes is multiple.

[0015] As a further improvement of this utility model, the snail breeding equipment with backwashing function has multiple breeding boxes, which are spaced apart in the horizontal and / or vertical directions.

[0016] The beneficial effects of this utility model are: the snail farming equipment with backwashing function of this utility model can achieve uniform rinsing from bottom to top by setting a bottom plate and a drainage cap located on the bottom plate, thereby eliminating H2S accumulation and improving the survival rate. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a three-dimensional structural diagram of the snail farming equipment with backwashing function according to this utility model; Figure 2 This is a front structural diagram of the snail farming equipment with backwashing function according to this utility model; Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure along the AA direction; Figure 4 yes Figure 3 A magnified structural diagram of region C in the middle; Figure 5 yes Figure 2 Schematic diagram of the cross-sectional structure in the middle BB direction; Figure 6 This is a top view schematic diagram of the snail farming equipment with backwashing function according to this utility model; Figure 7 This is a three-dimensional structural diagram of the snail farming equipment with backwashing function of this utility model, with some parts of the structure hidden. Figure 8 This is a three-dimensional structural diagram of the drainage cap of the snail farming equipment with backwashing function according to this utility model; Figure 9 This is a three-dimensional structural diagram of the base plate of the snail farming equipment with backwashing function according to this utility model. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] like Figures 1 to 9 As shown, the snail farming equipment 100 with backwashing function of this utility model includes a farming box 1, a bottom plate 2 set in the farming box 1, multiple drainage caps 3 set on the bottom plate 2, sand laid on the drainage caps 3, multiple partition plates 4, water supply components 5, drainage components 6, and a water pressure gauge 7.

[0022] The snail farming equipment 100 with backwashing function has multiple farming boxes 1, which are spaced apart in the horizontal and / or vertical directions.

[0023] In this embodiment, multiple breeding boxes 1 adopt a modular design and are arranged at intervals in both the horizontal and vertical directions. This interval arrangement ensures sufficient space for pipe layout and maintenance operations. This design allows the breeding boxes 1 to be densely arranged along the wall, maximizing the use of the available space.

[0024] The breeding tanks are arranged in layers, with the distance between layers controlled at 60 centimeters. This height has been optimized to ensure sufficient working space above the tanks while avoiding the need for expensive and space-consuming walkways around the shelves.

[0025] The piping system is positioned below the lowest breeding tank 1 and close to the wall to further optimize space utilization. This arrangement supports rapid assembly and expansion, aligning with the modular manufacturing concept.

[0026] The bottom plate 2 is spaced apart from the bottom of the breeding box 1. The bottom plate 2, the bottom wall 11 and the side wall 12 of the breeding box 1 form a water supply space 13. The water supply space 13 serves as a water distribution area and is connected to the nozzles or drain caps 3 on the bottom plate 2 to achieve a uniform distribution of water flow from bottom to top. The water supply space 13 supports reverse water circulation, that is, water flow from bottom to top, ensuring that oxygen is evenly distributed to the substrate and preventing the accumulation of hydrogen sulfide (H2S). Tests show that this design eliminates black sand areas at the bottom and increases the survival rate of snails by about 6.4%.

[0027] The water supply space 13 can also serve as a water flow buffer, reducing backwash water consumption and shortening cleaning time to within 5 minutes. Simultaneously, the structure of the water supply space 13 reduces water flow velocity, minimizing stress on snails.

[0028] The water supply space 13 is integrated inside the breeding tank 1, eliminating the need for external pipes, reducing components such as flanges and bolts, significantly lowering costs and improving sealing.

[0029] like Figures 7 to 8 As shown, the inlet end of the drain cap 3 is connected to the water supply space 13, and the outlet end of the drain cap 3 is located above the bottom plate 2.

[0030] The drain cap 3 is evenly fixed on the base plate 2, with its inlet end embedded and sealed to the water supply space 13 below, and its outlet end extending upward through the base plate 2 and slightly above the plate surface, allowing water to spray out from bottom to top. In this embodiment, the use of the drain cap 3 to achieve water spraying makes the water output more uniform, while the upward water flow speed is gentle, avoiding impact on the snails. Stress tests show that the snails can resume normal activity within 30 minutes after backwashing, ensuring the stability of their growth cycle. The drain cap 3 concentrates the water flow from the water supply space 13 and sprays it upward, forming a stable reverse water flow.

[0031] The drainage cap 3 includes an inlet rod 31 and an outlet tower 32 connected to the inlet rod 31. The bottom of the outlet tower 32 is circular. The inlet rod 31 connects the water supply space 13 below and the outlet tower 32. The outlet tower 32 gradually decreases in size from bottom to top and has multiple outlets arranged circumferentially. The multiple outlets can ensure the water output and uniformity, while also reducing the water flow velocity.

[0032] The base plate 2 is provided with multiple receiving compartments 21, each receiving compartment 21 is provided with a drainage cap 3, and each receiving compartment 21 is formed by an inclined wall 22, which is inclined from bottom to top toward the side away from the drainage cap 3.

[0033] The base plate 2 is made of PE material, and the receiving compartment 21 is integrally formed with the base plate 2 through vacuum molding. The inclined wall 22 of the receiving compartment 21 forms a flow guiding structure around the drain cap 3, with its top opening area being larger than its bottom area, effectively guiding the water flow. The inclined wall 22 structure amplifies the effective rinsing range of a single drain cap 3, and in this embodiment, the number of nozzles required for the base plate 2 can be optimized to be reduced by more than half. This directly reduces material costs, processing complexity, and system failure rate.

[0034] The gradually widening sloping wall structure 22 effectively prevents sand particles from clogging the outlet gaps of the drain cap 3 when they fall back after backwashing. At the same time, this design provides an independent protective cavity for each drain cap 3, making it less susceptible to damage during sand removal operations and facilitating the inspection and replacement of individual nozzles.

[0035] The regularly arranged receiving compartments 21 and their inclined walls 22 form a dense reinforcing structure, which significantly enhances the overall rigidity and load-bearing capacity of the base plate 2, enabling it to stably support the weight of the sand layer and water above, and extending the service life of the equipment.

[0036] The receiving compartments 21 are arranged in a rectangular array. This rectangular array is the optimal layout for achieving complete and uniform coverage of the bottom area. This regular arrangement ensures seamless connection of the water flow from each drain cap 3, forming a uniform upward water flow force field, completely avoiding the flushing blind spots that may occur with circular or random arrangements, thus ensuring effective cleaning of the entire substrate. The regular array makes the water flow distribution within the water supply space 13 more orderly and reduces resistance. Compared to a random arrangement, it significantly reduces pressure loss during water transport, thereby reducing pump energy consumption while achieving the same backwashing effect. The rectangular array greatly simplifies the design and manufacturing process of the substrate 2 mold. When vacuum molding the PE substrate 2 or casting it with epoxy resin, the mold with the regular array is easier to process, has higher precision, and is conducive to large-scale standardized production, thus significantly reducing the manufacturing cost of a single substrate 2.

[0037] Each receiving compartment 21 is formed by four inclined walls 22. The four inclined walls 22 enclose a frustum-shaped independent cavity, providing a dedicated and structurally stable working space for each drain cap 3. This enclosed cavity effectively constrains the water flow, ensuring that after entering from the water supply space 13, it is precisely guided to the outlet of the drain cap 3, preventing disorderly diffusion or mutual interference of the water flow at the bottom, and ensuring the concentration and stability of the water flow direction. The symmetrical design of the four inclined walls 22 allows the water flow sprayed from the drain cap 3 to be evenly guided in all directions, forming a near-perfect radial flow field. This uniformly distributed water flow force is key to achieving thorough flushing of the substrate, ensuring that the sand is uniformly fluidized and boiled, and completely removing waste.

[0038] The numerous regularly arranged quadrangular walls 22 of the receiving compartments 21 form a dense network of reinforcing ribs on the base plate 2. This structure significantly improves the bending and compressive stiffness of the base plate 2, enabling it to stably withstand the total weight of the sand layer, water, and screws above, preventing the base plate 2 from deforming due to long-term load and extending the service life of the equipment.

[0039] The inclined wall 22 has an angle of 45 degrees. This 45-degree angle represents the optimal balance between water flow impact and coverage area. An angle that is too small (steep) would limit the water flow's diffusion range, resulting in blind spots during flushing; an angle that is too large (gentler) would weaken the vertical uplift force of the water flow, reducing fluidization. The 45-degree angle ensures that the water flow achieves sufficient lateral diffusion to cover a larger area while maintaining effective vertical uplift force to agitate the substrate. During backwash intervals, the inclined wall provides a natural sliding slope for falling sand particles. The sand particles will slide back to the center of the substrate along the 45-degree inclined wall 22, rather than accumulating at the top edge of the drain cap 3. This "self-cleaning" effect effectively prevents sand particles from clogging the outlet gaps of the drain cap 3, ensuring long-term stable operation of the system.

[0040] From a manufacturing perspective, a 45-degree angle is a commonly used "demolding draft angle" in molding processes such as vacuum molding. It facilitates mold processing and demolding of plastic parts, helping to ensure consistent quality in mass production. At the same time, this angle also provides good structural stability, giving the inclined wall 22 sufficient strength.

[0041] Four sloping walls 22 form the functional basic cavity, while the 45-degree inclination angle gives this receiving compartment 21 optimal performance. The combination of the two ultimately achieves the technical effect of comprehensive and efficient cleaning of the substrate with the fewest number of nozzles and the lowest water consumption, directly solving the core pain point of substrate pollution in traditional aquaculture.

[0042] The receiving compartment 21 also includes a receiving section 23 located at the bottom of the inclined wall 22. The receiving section 23 is columnar, and the bottom of the water outlet tower 32 is located inside the receiving section 23. The water inlet rod 31 extends vertically through the bottom of the receiving section 23.

[0043] The columnar receiving portion 23 provides a deep enclosure and support base for the inlet rod 31 of the drain cap 3. By allowing the inlet rod 31 to pass through the bottom of the receiving portion 23 and securing it with a nut under the base plate 2, a highly reliable mechanical seal can be formed. This design effectively prevents leakage or loosening at the connection during high-pressure backwashing, ensuring long-term reliability. The standardized columnar receiving portion 23 makes the installation of the drain cap 3 simple and precise. More importantly, when a drain cap 3 needs to be inspected or replaced, it can be removed without damaging the entire structure of the base plate 2; simply unscrew the nut from below. This modular design greatly simplifies subsequent maintenance work and reduces maintenance costs and time.

[0044] During vacuum molding or epoxy resin casting, the columnar receiving portion 23 serves as a precise feature in the mold, ensuring that the installation position and verticality of each drain cap 3 are consistent. This consistency is fundamental to ensuring uniform water flow distribution at the bottom, avoiding uneven water flow caused by installation errors. The receiving portion 23's wrapping and guiding of the inlet rod 31 allows water to enter the drain cap 3 more smoothly, reducing turbulence and pressure loss, and contributing to improved outflow efficiency and operational stability of the drain cap 3.

[0045] The snail farming equipment 100 with backwashing function in this embodiment has at least two states: a normal water intake state and a backwashing state for backwashing sand.

[0046] like Figure 7 As shown, the partition plate 4 is installed in the water supply space 13. Multiple partition plates 4 are spaced apart to divide the water supply space 13 into multiple non-interconnected partition spaces 131. Each partition space 131 is connected to multiple drain caps 3.

[0047] Multiple partitioned spaces 131 can work together or work independently. In this embodiment, when the snail farming equipment 100 with backwashing function is in the water intake state, multiple partitioned spaces 131 work together. However, when the snail farming equipment 100 with backwashing function is in the backwashing state, each partitioned space 131 works separately, that is, only one partitioned space 131 works at a time.

[0048] Backwashing requires higher flow rates and pressures. Since only one partitioned space 131 operates during this process, the system load is reduced. Pumps, pipes, valves, and other components do not need to be designed for the massive peak flow rates, allowing for the use of smaller equipment, significantly lowering initial investment costs. The energy consumption of driving a small-flow pump is far lower than that of a large-flow pump, resulting in operational cost savings. Due to the short and efficient single-wash cycle, total water consumption is effectively controlled, aligning with the water-saving and environmentally friendly aquaculture philosophy.

[0049] In this embodiment, when the snail farming equipment 100 with backwashing function is in backwashing mode, each partition space 131 is backwashed sequentially. This alternating backwashing ensures that each partition receives sufficient water volume and pressure for thorough cleaning, avoiding the problem of dead zones caused by uneven water distribution on the large bottom plate 2. Furthermore, only a small area is washed at a time, leaving most of the snails undisturbed. Compared to the entire substrate being violently agitated simultaneously, this localized and brief washing method causes less stress to the snails, promoting their growth and survival.

[0050] There are multiple base plates 2. Each water supply space 13 is provided with a base plate 2 above it. Each base plate 2 is provided with multiple receiving compartments 21. The receiving compartments 21 on each base plate 2 are arranged in a rectangular array.

[0051] There are 7 base plates 2 and 7 partition spaces 131.

[0052] More partitions are not necessarily better. Too many partitions can lead to overly complex valve and control systems, increasing costs and potential points of failure; too few partitions, on the other hand, cannot effectively reduce peak flow. The design of seven partitions likely represents an optimal balance found through experimentation between "effectively reducing flow" and "system complexity," achieving both manageable flow levels and maintaining relative system simplicity and reliability.

[0053] However, in snail farming equipment 100 with backwashing function of different sizes, the number of bottom plates 2 and partition spaces 131 is not limited to this, and can be more or less.

[0054] like Figures 1 to 5 As shown, the water supply assembly 5 is used to supply water to the breeding tank 1. The water supply assembly 5 includes a water supply chamber 51 adjacent to the breeding tank 1, a water supply main pipe 52 connected to the water supply chamber 51, a water inlet pipe 53, a backwash pipe 54, and a variable frequency pump connected to the backwash pipe 54.

[0055] The water supply chamber 51 is connected to the partition space 131. In this embodiment, the integrated water supply chamber 51 replaces the traditional complex pipe network, improving the utilization rate of internal space and making the system structure more compact. This is particularly beneficial for the setting of multi-layer modular breeding racks, leaving more space for robot or manual operation.

[0056] Both the inlet pipe 53 and the backwash pipe 54 are connected to the main water supply pipe 52.

[0057] The inlet pipe 53 is used for daily slow water replenishment to maintain a stable water level; the backwash pipe 54 connects to the variable frequency pump to provide periodic, high-flow-rate flushing power. This separate design allows for independent optimization of two distinct operating conditions, avoiding the contradiction that a single pipe cannot simultaneously meet the needs of low-flow water replenishment and high-flow-rate flushing. In addition to the variable frequency pump, water pressure and flow rate can also be adjusted by controlling the valve opening on the backwash pipe 54.

[0058] The side wall 12 of the breeding tank 1 is provided with multiple connecting doors 14 and multiple control valves 15 for controlling the opening and closing of the connecting doors 14. The control valves 15 are used to control the opening and closing of the connecting doors 14 to control the connection between the partition space 131 and the water supply chamber 51. Each control valve 15 independently controls one connecting door 14. The breeding tank 1 has a water inlet state with all connecting doors 14 open and a backwash state with only one connecting door 14 open. When the breeding tank 1 is in the backwash state, each connecting door 14 opens in sequence.

[0059] In this embodiment, a connecting door 14 is provided on the side wall 12 of the breeding box 1 corresponding to each partition space 131, and its opening and closing are precisely controlled by an independent control valve 15.

[0060] This embodiment enables zoned and timed alternating backwashing, significantly reducing peak loads. Controlled by valve 15, the snail farming equipment 100 with backwashing function opens only one connecting door 14 at a time during backwashing, powerfully flushing only one partitioned space 131. This drastically reduces water demand to 1 / 7. This makes efficient cleaning possible using small, low-power pumps and pipes, key to reducing equipment investment and operating costs. Alternating flushing ensures each zone receives sufficient water volume and pressure, achieving thorough cleaning without dead zones. Simultaneously, disturbing only a small area of ​​snails at a time, compared to simultaneously churning the entire tank, greatly reduces stress, promoting growth and survival. Valve 15 can be programmed for timed and sequential automatic backwashing, such as setting fixed intervals for flushing or monitoring water quality before flushing.

[0061] Variable frequency pumps can precisely adjust the pressure and flow rate of the output water to adapt to the needs of different breeding stages or substrate conditions. For example, a gentler flushing force can be used during the snail larvae stage, while the flushing force can be increased in the later stages of breeding or when there is more dirt in the substrate, achieving intelligent and customized cleaning.

[0062] The water pressure gauge 7 is used to detect the water pressure in the water supply chamber 51. A pressure lower than the set value may indicate insufficient flushing force and poor performance; abnormally high pressure may indicate a risk of blockage in the pipes or drain cap 3. By setting the water pressure gauge 7, timely measurement and feedback of water pressure can be achieved.

[0063] The drainage assembly 6 includes a drainage plate 61 extending horizontally inward from the side wall 12 of the breeding tank 1, a baffle plate 62 extending upward from the end of the drainage plate 61 away from the side wall 12 of the breeding tank 1, and a drainage pipe 63.

[0064] The bottom of the drainage plate 61 has a drainage hole 64, and a drainage pipe 63 is connected to the drainage hole 64. The drainage pipe 63 is installed through the side wall 12 of the breeding box 1. The drainage plate 61 and the baffle plate 62 surround the side wall 12 of the breeding box 1, and there are multiple drainage holes 64.

[0065] The drainage component 6 in this embodiment achieves a balance between efficient drainage and effective escape prevention. During normal operation, snails will slip off the drainage plate 61 and cannot climb over the barrier plate 62, thus confining them within the breeding tank 1. When the water level rises, water can be quickly discharged through the drainage hole 64.

[0066] Each breeding box 1 has four drainage holes 64. Multiple drainage holes 64 are opened at the bottom of the drainage plate 61, which are connected to the external water outlet pipe passing through the clearance hole in the box wall through the internal connecting pipe of the breeding box 1, realizing efficient drainage of internal water to the outside and making it less likely for dirt to remain.

[0067] The top of the baffle plate 62 also has a reinforcing section 65 that bends toward the adjacent side wall 12.

[0068] The reinforcing part 65 forms a 45-degree angle with the baffle plate 62. At the top of the baffle plate 62, a reinforcing part 65 is provided that bends towards the tank wall, forming a 45-degree angle with the baffle plate 62, which not only strengthens the structure but also makes the drainage more stable.

[0069] The baffle plate 62 and the drainage plate 61 are integrally formed. The drainage plate 61 and the baffle plate 62 are integrally formed, surrounding the inner side wall 12 of the aquaculture tank 1 to form a continuous L-shaped built-in drainage channel. The integral forming process avoids leakage points and structural weaknesses that may be caused by welding or bolting, making the entire drainage assembly 6 more durable and reliable, and adaptable to the long-term corrosive environment of aquaculture. The drainage assembly 6 replaces the traditional method of placing the drainage outlet on the outside of the tank. Since all drainage structures are built-in, the outer wall of the aquaculture tank 1 becomes flat. This allows the tank to be placed close to the wall or arranged closely in multi-layer aquaculture racks, eliminating the obstruction of external drainage pipes 63.

[0070] The drain pipe 63 includes a transfer pipe and an outlet pipe. A clearance hole is provided on the side wall 12. The transfer pipe is installed inside the breeding box 1 and connects the drain hole 64 and the clearance hole. The outlet pipe is installed outside the breeding box 1 and connects to the clearance hole.

[0071] The snail farming equipment 100 of this utility model with backwashing function can achieve uniform rinsing from bottom to top by setting a bottom plate 2 and a drainage cap 3 located on the bottom plate 2, thereby eliminating H2S accumulation and improving the survival rate; the L-shaped integrated drainage trough composed of the baffle plate 62 and the drainage plate 61 integrates drainage and escape prevention functions, saving space and enhancing structural stability; the receiving grid 21 surrounded by the inclined wall 22 reduces the density of the drainage cap 3, ensuring no dead corners while reducing costs and energy consumption, and ensuring uniform water output.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A snail farming device with a backwashing function, characterized in that: The snail farming equipment with backwashing function includes a farming box, a bottom plate set inside the farming box, multiple drainage caps set on the bottom plate, sand laid on top of the drainage caps, and a water supply component. The bottom plate is spaced apart from the bottom of the farming box, and the bottom plate, the bottom wall, and the side walls of the farming box form a water supply space. The water inlet end of the drainage cap is connected to the water supply space, and the water outlet end of the drainage cap is located above the bottom plate.

2. The snail farming equipment with backwashing function according to claim 1, characterized in that: The snail farming equipment with backwashing function also includes multiple partition plates, which are arranged in the water supply space. The multiple partition plates are spaced apart to divide the water supply space into multiple non-interconnected partition spaces, and each partition space is connected to multiple drain caps.

3. The snail farming equipment with backwashing function according to claim 2, characterized in that: The water supply assembly includes a water supply chamber located adjacent to the breeding tank and a main water supply pipe connected to the water supply chamber, wherein the water supply chamber is connected to the partition space.

4. The snail farming equipment with backwashing function according to claim 3, characterized in that: The side wall of the breeding tank is provided with multiple connecting doors and multiple control valves for controlling the opening and closing of the connecting doors. The control valves are used to control the opening and closing of the connecting doors to control the connection between the partition space and the water supply chamber. Each control valve independently controls one connecting door. The breeding tank has a water inlet state with all connecting doors open and a backwash state with only one connecting door open. When the breeding tank is in the backwash state, each connecting door opens in sequence.

5. The snail farming equipment with backwashing function according to claim 3, characterized in that: The water supply assembly also includes an inlet pipe and a backwash pipe, both of which are connected to the main water supply pipe.

6. The snail farming equipment with backwashing function according to claim 5, characterized in that: The water supply assembly also includes a variable frequency pump connected to the backwash pipe.

7. The snail farming equipment with backwashing function according to claim 3, characterized in that: The snail farming equipment with backwashing function also includes a water pressure gauge, which is used to detect the water pressure in the water supply chamber.

8. The snail farming equipment with backwashing function according to claim 1, characterized in that: The snail farming equipment with backwashing function also includes a drainage component, which includes a drainage plate extending horizontally inward from the side wall of the farming tank, a baffle plate extending upward from the end of the drainage plate away from the side wall of the farming tank, and a drainage pipe. The bottom of the drainage plate is provided with a drainage hole, and the drainage pipe is connected to the drainage hole and is installed through the side wall of the farming tank.

9. The snail farming equipment with backwashing function according to claim 8, characterized in that: The drainage board and the baffle plate surround the side wall of the breeding box, and there are multiple drainage holes.

10. The snail farming equipment with backwashing function according to claim 1, characterized in that: The snail farming equipment with backwashing function has multiple farming boxes, which are spaced apart in the horizontal and / or vertical directions.

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