Rice soilless culture device

Abstract

The application discloses a kind of rice soilless cultivation device in the field of rice cultivation, comprising: water tank;Rice cultivation module, comprising a plurality of sequentially first communication rice cultivation unit, the rice cultivation unit includes cultivation box and root channel, the cultivation box outside is respectively provided with water inlet and water outlet, the root channel is arranged in cultivation box inside, including main channel, the upper end of the main channel is communicated with cultivation box, lower end is connected with multiple first-level channels, side is communicated with water inlet, the lower end of each first-level channel is connected with multiple secondary channels, the lower end of each secondary channel is connected with multiple tertiary channels, the main channel, secondary channel and tertiary channel end are all communicated with water outlet by public channel;Water pump is used to pump water in water tank into rice cultivation module;Water supply pipeline is used to connect rice cultivation module, water pump and water tank, to form circulating waterway.The application can meet the fine, factory cultivation demand of rice.

Description

Technical Field

[0001] This invention belongs to the field of rice cultivation technology, and specifically relates to a soilless rice cultivation device. Background Technology

[0002] Traditional rice cultivation has long relied on soil, leading to problems such as land scarcity and water waste. Therefore, soilless cultivation technology has been introduced to alleviate land pressure and reduce water waste. Current soilless rice cultivation devices completely immerse the roots of rice seedlings in water, allowing the roots to directly absorb nutrients from the water and meet their nutritional needs during growth stages.

[0003] For example, patent application number CN201920685804.8, entitled "An apparatus suitable for soilless cultivation of organic rice in factories," includes at least one cultivation pipe and at least one cultivation cup. At least one cultivation hole is spaced apart on the cultivation pipe, and a cultivation cup is placed in each cultivation hole. The outer circumference of each cultivation cup is conical and consists of two mirror-image halves. The two halves have undulating serrations on their opposite surfaces. By connecting several cultivation pipes in series with a water treatment device and a rice cultivation nutrient addition device, the cultivation water is treated, and the nutrients required for rice cultivation are added through the rice cultivation nutrient addition device. Its shortcomings are: (1) Although the device and cultivation method can save land, the device needs to be large in size and the demand for water and nutrients is also large because the entire root system of rice needs to be completely immersed in water, resulting in low overall efficiency; (2) The roots of rice are completely submerged in water and are greatly affected by the buoyancy of water, which is very different from the stress state of roots rooted in soil, and also seriously affects the absorption of nutrients in water by the roots. Summary of the Invention

[0004] The purpose of this invention is to provide a soilless rice cultivation device that can provide the water required for rice growth while saving water consumption, thus meeting the needs of refined and industrialized rice cultivation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a soilless rice cultivation device, comprising: a water tank; a rice cultivation module, comprising a plurality of rice cultivation units connected sequentially, each rice cultivation unit including a cultivation box and a root channel, wherein an inlet and an outlet are respectively provided on the outside of the cultivation box, the root channel is located inside the cultivation box and includes a main channel, the upper end of the main channel being connected to the cultivation box, the lower end being connected to a plurality of primary channels, and the side being connected to the inlet, each primary channel being connected to a plurality of secondary channels at its lower end, each secondary channel being connected to a plurality of tertiary channels at its lower end, and the ends of the main channel, secondary channels, and tertiary channels being connected to the outlet through a common channel; a water pump for pumping water from the water tank into the rice cultivation module; and a water supply pipe for connecting the rice cultivation module, the water pump, and the water tank to form a circulating water path.

[0006] In this invention, one or more rice plants are planted in each rice cultivation unit. The rice seedlings extend into the air from the main channel of the rice cultivation unit, and the rice roots extend downward through the main channel into the primary, secondary, and tertiary channels. Water and nutrient solution in the water tank are introduced into the rice cultivation module through pipes, that is, sequentially introduced into the inlets of multiple cultivation boxes, and then flow through all channels of each rice cultivation unit. Finally, the water flows back to the water tank through a water pump. The entire water circuit is powered by the water pump to form a circulating water circuit. In each rice cultivation unit, water enters the main channel from the inlet, then enters the primary, secondary, and tertiary channels, and finally converges into the common channel. After passing through the outlet, it enters the adjacent rice cultivation module. During this process, the water flow transports nutrients in the water to each channel of each rice cultivation module for absorption by the rice roots.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) Through the hierarchical system design of the main channel and the three-level channel, the water flow only needs to fill the limited space of each level of channel to cover the entire root surface. The water flow penetrates the channel step by step through capillary action and gravity, avoiding the redundancy of water in the traditional submersion method, significantly saving water consumption, and simultaneously reducing the amount of nutrient solution added, thus reducing production costs; (2) The rice seedling roots are confined within the hierarchical solid channel. The channel walls of the main channel, the first-level channel, the second-level channel and the third-level channel form a mechanical anchor for the roots, simulating the physical support of the soil for the roots, restoring their natural extension shape, which is more in line with the original root stress state of rice. The roots are in a fixed position within the channel. The distribution of the rice cultivation units enhances the contact area and retention time between the seedling roots and nutrients in the water flow, which is more conducive to the absorption of nutrients, improves cultivation efficiency, and increases yield; (3) The rice cultivation units are designed to be connected end to end, so that multiple rice cultivation units can be connected in series or in parallel in practical applications, which can flexibly adapt to different scale requirements; (4) The circulating water circuit recovers unabsorbed water and residual nutrients through the outlet, realizing closed-loop recycling. Compared with the open soilless cultivation device, this device reduces evaporation and leakage losses, improves water resource utilization, and the closed water circuit can isolate external pollutants, meeting the core requirements of organic certification. In addition, the water pump can be combined with timed control to supply water on demand, further reducing energy consumption.

[0008] As a further improvement of the present invention, the apertures of the main channel, primary channel, secondary channel, and tertiary channel decrease sequentially from top to bottom. When water flows through the gradually narrowing tertiary channel, the flow velocity increases, creating slight turbulence and increasing the dissolved oxygen level in the water.

[0009] As a further improvement of the present invention, the inlet is a countersunk hole shape, and the outlet is a boss shape, with the outlet inserted into an adjacent inlet. The standardized design of the inlet and outlet simplifies pipe connection and cleaning.

[0010] As a further improvement of the present invention, the water supply pipeline includes a first pipeline, a second pipeline, a third pipeline, an inlet flange, and an outlet flange. One end of the first pipeline is connected to the outlet hole on the water tank, and the other end is connected to the inlet of the first rice cultivation unit via the inlet flange. One end of the second pipeline is connected to the inlet of the last rice cultivation unit via the outlet flange, and the other end is connected to the inlet of the water pump. One end of the third pipeline is connected to the outlet of the water pump, and the other end is connected to the return hole on the water tank. The closed-loop water circuit isolates the external environment, and combined with the flange seal, meets the cleanliness requirements of organic rice cultivation.

[0011] As a further improvement of the present invention, the return water hole is located above the outlet water hole. When the air bubbles carried by the water flow return to the water tank, they are more likely to be released near the top of the water tank liquid surface, rather than being carried by the water flow and re-entering the system circulation. This helps to reduce the accumulation of air in the system, improve the efficiency of the water pump, avoid cavitation, and ensure a stable water flow to each cultivation unit.

[0012] As a further improvement of the present invention, the water inlet flange includes a connecting part and a plug-in part on the same axial direction, and a water inlet pipe is provided in the connecting part and the plug-in part. The outer diameter of the plug-in part is smaller than the outer diameter of the connecting part and is adapted to the inner diameter of the water inlet.

[0013] As a further improvement of the present invention, the outlet flange has two outlet channels located on the same axis, one for water discharge and the other for water discharge. The inner diameter of the first outlet channel is adapted to the outer diameter of the outlet. This provides a natural "guide cone," and during installation, the connector can be inserted into the inlet of the corresponding rice cultivation unit to achieve initial concentric positioning.

[0014] As a further improvement of the present invention, the root system channel also includes a horizontal channel, and the main channel is connected to the inlet through the horizontal channel. The water flows horizontally from the inlet into the horizontal channel, and then smoothly turns into the vertical main channel, which greatly reduces the direct impact of the water flow on the inlet of the main channel, effectively balances the water pressure fluctuations between multiple inlets, and ensures that the water pressure at the inlet of the main channel is more uniform and stable, laying the foundation for subsequent diversion to multi-stage channels.

[0015] As a further improvement of the present invention, one end of the common channel is closed, and the other end is connected to the outlet. This provides an almost equal back pressure environment for all three-stage channel outlets, which in turn promotes a more uniform flow distribution in the upstream branch channels, ultimately making the root contact water flow more consistent across all levels.

[0016] As a further improvement of the present invention, the rice cultivation unit is made of clay, plastic, resin or composite material. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the rice cultivation unit of the present invention.

[0019] Figure 3 This is a schematic diagram of the water inlet flange of the present invention.

[0020] Figure 4 This is a schematic diagram of the water outlet flange of the present invention.

[0021] The system includes: 1. Cultivation box; 101. Water inlet; 102. Water outlet; 2. Root system channel; 201. Main channel; 202. Primary channel; 203. Horizontal channel; 204. Secondary channel; 205. Tertiary channel; 206. Common channel; 3. Water tank; 301. Water outlet; 302. Water return hole; 4. Water supply pipe; 401. First pipe; 402. Second pipe; 403. Third pipe; 404. Water inlet flange; 404a. Connection part; 404b. Insertion part; 404c. Water inlet pipe; 404d. O-ring seal; 404e. Flat sealing gasket; 405. Water outlet flange; 405a. Water outlet channel one; 405b. Water outlet channel two; 405c. Lip seal; 5. Water pump. Detailed Implementation

[0022] like Figure 1-2 The image shows a soilless rice cultivation device, comprising a water tank 3, a rice cultivation module, a water pump 5, and a water supply pipe 4. The water pump 5 is used to pump water from the water tank 3 into the rice cultivation module. The rice cultivation module includes two rice cultivation units connected sequentially. Each rice cultivation unit includes a cultivation box 1 and a root channel 2. The cultivation box 1 has an inlet 101 and an outlet 102 on both sides. The root channel 2 is located inside the cultivation box 1 and includes a main channel 201. The upper end of the main channel 201 is connected to the top surface of the cultivation box 1, and the lower end is connected to two primary channels 202. It is connected to the inlet 101 via a horizontal channel 203 on the side. Each primary channel 202 is connected to two secondary channels 204 at its lower end, and each secondary channel 204 is connected to two tertiary channels 205 at its lower end. The ends of the main channel 201, secondary channels 204, and tertiary channels 205 are all connected to the outlet 102 via a common channel 206. One end of the common channel 206 is closed, and the other end is connected to the outlet 102. The closed cavity structure of the common channel 206 acts like a pressure vessel, forcing the water flow from all converging points to mix and flow smoothly within the common channel 206. Its internal pressure is automatically adjusted to be approximately equal, ensuring the overall flow rate at the outlet 102 remains stable. The water supply pipe 4 connects the rice cultivation module, the water pump 5, and the water tank 3 to form a circulating water path. Specifically, the water supply pipe 4 includes a first pipe 401, a second pipe 402, a third pipe 403, and an inlet pipe. Flange 404 and outlet flange 405, one end of the first pipe 401 is connected to the outlet hole 301 on the water tank 3, and the other end is connected to the inlet 101 of the first rice cultivation unit through the inlet flange 404. One end of the second pipe 402 is connected to the inlet 101 of the last rice cultivation unit through the outlet flange 405, and the other end is connected to the inlet end of the water pump 5. One end of the third pipe 403 is connected to the outlet end of the water pump 5, and the other end is connected to the return hole 302 on the water tank 3.

[0023] The apertures of the main channel 201, primary channel 202, secondary channel 204, and tertiary channel 205 decrease sequentially from top to bottom. Preferably, the aperture of the main channel 201 is 3-5 cm, which can accommodate the basal stem and primary roots; the aperture of the primary channel 202 is 1-2 cm, which guides the lateral expansion of tillers; the aperture of the secondary channel 204 is 0.8-1 cm, which can promote the differentiation of capillary roots; and the aperture of the tertiary channel 205 is 0.5 cm, which can induce the formation of a dense root hair zone. Each level of channel... The channel wall forms a gap fit with the root system of the corresponding diameter, which can not only avoid squeezing and damaging the root system, but also provide lateral support, simulate the anchoring effect of soil particles, and restore the natural geotropism of the root system. After receiving water from the inlet 101, the main channel 201 distributes the water through the first-level, second-level and third-level channels 205 in a step-by-step manner, covering the entire cultivation box 1 area. This avoids the "dead zone" problem of water flow that is common in traditional soilless cultivation, and ensures that the rice roots are in uniform contact with water and dissolved nutrients, thereby improving growth uniformity and yield.

[0024] In this embodiment, the inlet 101 is a countersunk hole and the outlet 102 is a boss. The outlet 102 is inserted into the adjacent inlet 101 to form an interlocking insertion structure. The contact surface between the inner wall of the countersunk hole and the outer wall of the boss generates radial pressure to achieve continuous sealed transmission of water flow.

[0025] The return water hole 302 is designed above the outlet water hole 301. When the water pump 5 stops working, the high position of the return water hole 302 gives the third pipe 403 connecting the outlet of the water pump 5 and the water tank 3 a natural downward slope. The water in the pipe will naturally flow to the return water hole 302 and back to the water tank 3 under the action of gravity. This ensures that the outlet section of the water pump 5 and the third pipe 403 can be emptied as much as possible when the machine stops, avoiding long-term water accumulation in the pipe from the outlet of the water pump 5 to the water tank 3, thereby preventing the growth of bacteria, algae or sediment in the stagnant water area and reducing the risk of blockage and pollution in the circulating water circuit.

[0026] like Figure 3-4As shown, the inlet flange 404 includes a connecting part 404a and a plug part 404b on the same axial direction. An inlet pipe 404c is provided in the connecting part 404a and the plug part 404b. The outer diameter of the plug part 404b is smaller than the outer diameter of the connecting part 404a and is adapted to the inner diameter of the inlet 101. To further improve the sealing reliability, an O-ring 404d is fitted around the plug part 404b, and a flat sealing gasket 404e is added between the plug part 404b and the end face of the inlet 101 as a second seal. The outlet flange 405 has two outlet channels, 405a and 405b, located on the same axis. The inner diameter of outlet channel 405a is adapted to the outer diameter of outlet 102. A lip seal 405c is directly added to the end face of outlet channel 405a and outlet 102. When the outlet flange 405 is connected and tightened, channel 1 completes the limiting and guiding, and the lip seal 405c is axially and uniformly compressed to form a strong radial elastic seal, which greatly improves the overall sealing reliability.

[0027] The rice cultivation unit is made of plastic and the root channel 2 can be integrated and seamlessly connected through injection molding to avoid leakage, greatly reduce the weight of the unit and facilitate the deployment of the three-dimensional cultivation rack.

[0028] The advantages of this invention are: by simulating the structure of rice roots in paddy fields, a biomimetic microenvironment is provided, enabling rice to achieve normal growth in a soilless environment, improving the efficiency and yield of soilless rice cultivation, saving water and nutrients, and effectively saving costs.

[0029] This invention is not limited to the above embodiments. Based on the technical solutions disclosed in this invention, those skilled in the art can make some substitutions and modifications to some of the technical features without creative effort, and all such substitutions and modifications are within the protection scope of this invention.

Claims

1. A soilless rice cultivation device, characterized in that, include: Water tank; A rice cultivation module includes several rice cultivation units connected end-to-end in sequence. Each rice cultivation unit includes a cultivation box and a root channel. The cultivation box has an inlet and an outlet on its outer side. The root channel is located inside the cultivation box and includes a main channel. The upper end of the main channel is connected to the cultivation box, and the lower end is connected to multiple primary channels. A horizontal channel connects to the inlet on the side. Each primary channel is connected to multiple secondary channels at its lower end, and each secondary channel is connected to multiple tertiary channels at its lower end. The ends of the main channel, secondary channels, and tertiary channels are all connected to the outlet via a common channel. One end of the common channel is closed, and the other end is connected to the outlet. The aperture of the main channel, primary channels, secondary channels, and tertiary channels decreases sequentially from top to bottom. The inlet is a submerged hole, and the outlet is a protruding platform, inserted into an adjacent inlet. A water pump is used to pump water from the water tank into the rice cultivation module; Water supply pipes are used to connect rice cultivation modules, water pumps, and water tanks to form a circulating water system.

2. The soilless rice cultivation device according to claim 1, characterized in that, The water supply pipeline includes a first pipeline, a second pipeline, a third pipeline, an inlet flange, and an outlet flange. One end of the third pipeline is connected to the outlet hole on the water tank, and the other end is connected to the inlet of the first rice cultivation unit through the inlet flange. One end of the first pipeline is connected to the outlet of the last rice cultivation unit through the outlet flange, and the other end is connected to the inlet of the water pump. One end of the second pipeline is connected to the outlet of the water pump, and the other end is connected to the return hole on the water tank.

3. The soilless rice cultivation device according to claim 2, characterized in that, The return water hole is located above the outlet water hole.

4. The soilless rice cultivation device according to claim 2, characterized in that, The inlet flange includes a connecting part and a plug part on the same axial direction. A water inlet pipe is provided in the connecting part and the plug part. The outer diameter of the plug part is smaller than the outer diameter of the connecting part and is adapted to the inner diameter of the water inlet.

5. The soilless rice cultivation device according to claim 2, characterized in that, The outlet flange has two outlet channels located on the same axis, and the inner diameter of the outlet channel one is adapted to the outer diameter of the outlet.

6. The soilless rice cultivation device according to claim 1, characterized in that, The rice cultivation unit is made of clay, plastic, resin, or composite materials.

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