Agricultural breeding and seedling raising multipurpose experimental device

Abstract

The application relates to the technical field of agricultural breeding and seedling raising, and discloses a multi-purpose experimental device for agricultural breeding and seedling raising, which comprises a fixing frame, the outer wall of the fixing frame is fixedly connected with a chassis, the upper surface of the chassis is provided with a circulating assembly, the outer wall of the fixing frame is fixedly connected with a fixing box, the outer wall of the fixing box is slidably connected with a bottom box, the circulating assembly is connected with a pipeline, the pipeline is communicated with the fixing box, the outer wall of the water outlet section of the pipeline is fixedly provided with a filter screen, the outer wall of the filter screen is rotatably connected with a rotating shaft one, the outer wall of the rotating shaft one is fixedly connected with an impeller, and the impeller is located in the water outlet section of the pipeline. The circulating assembly and the pipeline form a closed loop circulation channel, the filter screen, the rotating shaft one and the impeller are arranged on the inner wall of the water outlet section of the pipeline. When the nutrient solution flows, the impact force drives the impeller to continuously rotate, and the nutrient solution in the pipeline is dynamically stirred. The nutrient solution can be effectively dispersed and uniformly mixed.

Description

Technical Field

[0001] This invention relates to the field of agricultural breeding and seedling technology, specifically to a multi-purpose experimental device for agricultural breeding and seedling cultivation. Background Technology

[0002] In the field of modern agricultural breeding and seedling cultivation, soilless cultivation using a nutrient solution circulation system has become the mainstream technology. Such systems typically consist of a fixed frame, seedling boxes, a base box, a circulation pump, and connecting pipelines. The circulation pump drives the nutrient solution to form a closed loop between the seedling box and the base box, ensuring a continuous supply of water and nutrients. To maintain the uniformity of the nutrient solution composition, most existing devices rely on the pumping action of the circulation pump itself. The turbulence generated by the continuous flow of liquid within the pipeline passively mixes the nutrient solution, preventing the natural sedimentation and concentration stratification of soluble nutrients and trace elements.

[0003] However, the primary function of a circulating pump is to provide the driving force for liquid flow. The turbulence it generates is limited and exists only in localized areas within the pipe channels and near the inlet. For the relatively static, large-volume nutrient solution in the seedling tray, the stirring effect is uneven. Secondly, various inorganic salts, trace elements, and organic additives in the nutrient solution are easily accumulated at pipe bends and in corners with lower flow rates during long-term circulation due to gravity. If proactive intervention is not taken in time, these precipitates will not only lead to uneven distribution of the effective components of the nutrient solution, causing significant differences in nutrient absorption by seedlings in different areas and at different levels, but may also clog filter components or circulating pump impellers, affecting the long-term stability and reliability of the system. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a multi-purpose experimental device for agricultural breeding and seedling raising, which solves the problems of uneven stirring effect of circulating pumps and sedimentation and accumulation in pipe bends and corner areas with low flow rates.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-purpose experimental device for agricultural breeding and seedling raising, comprising a fixed frame, a base frame fixedly connected to the outer wall of the fixed frame, a circulation component provided on the upper surface of the base frame, a fixed box fixedly connected to the outer wall of the fixed frame, a base box slidably connected to the outer wall of the fixed box, a pipeline connected to the circulation component, the pipeline communicating with the fixed box, a filter screen fixedly provided on the outer wall of the water outlet section of the pipeline, a rotating shaft rotatably connected to the outer wall of the filter screen, an impeller fixedly connected to the outer wall of the rotating shaft, and the impeller located inside the water outlet section of the pipeline.

[0006] Preferably, the circulation assembly includes a circulation pump, the output end of which is fixedly connected to a feeding box, the outer wall of which is connected to a pipeline on the water outlet side, the input end of which is fixedly connected to a filter box, the filter box being connected to a pipeline on the water inlet side, and the feeding box, circulation pump, and filter box are all fixedly installed on the upper surface of the base frame.

[0007] Preferably, a seedling tray is slidably connected inside the fixed box, and the seedling tray has placement holes inside, which are stepped.

[0008] Preferably, a slider is fixedly connected to the lower surface of the seedling tray, a sliding rod is fixedly connected to the lower surface of the slider, and an adjustment mechanism is provided on the outer wall of the fixing box.

[0009] Preferably, the adjusting mechanism includes a housing and a valve plate. The outer wall of the housing is fixedly connected to the outer wall of the fixed box. The outer wall of the slide rod is slidably connected to the inside of the housing. The bottom end of the slide rod is fixedly connected to the valve plate. The pipeline passes through the housing and cooperates with the valve plate. A valve hole is opened inside the valve plate. The pipeline is fixedly connected to the housing.

[0010] Preferably, a second rotating shaft is fixedly connected inside the fixed box, and a second connecting rod is rotatably connected to the outer wall of the second rotating shaft. A driving mechanism is provided inside the fixed box. The driving mechanism is in contact with the second connecting rod and the first slider. The end of the second connecting rod away from the driving mechanism is fixedly connected to the second slider. A limit rail is slidably connected to the outer wall of the second slider. The lower surface of the limit rail is fixedly connected to the inner bottom wall of the bottom box.

[0011] Preferably, the driving mechanism includes a bracket and a second slide rod. The bracket is fixedly connected inside the fixed box, and the second slide rod is slidably connected to the bracket. Both ends of the second slide rod are fixedly connected to a ball, and the outer wall of the ball is respectively attached to the outer wall of the second connecting rod and the first slider.

[0012] Preferably, a fixing plate is fixedly connected to the outer wall of the fixing frame, and a spring is fixedly connected to the outer wall of the fixing plate, with the top end of the spring fixedly connected to the lower surface of the base box.

[0013] Preferably, the outer wall of the seedling tray is rotatably connected to a rotating shaft three, and the outer wall of the rotating shaft three is fixedly connected to a connecting rod three and a trumpet plate. The trumpet plate is located below the placement hole, and the connecting rod three is located inside the placement hole.

[0014] Preferably, the lower surface of the fixing frame is fixedly connected with casters.

[0015] This invention provides a multi-purpose experimental device for agricultural breeding and seedling raising. It has the following beneficial effects: 1. This invention forms a closed-loop circulation path by setting up a circulation component and pipeline, and installing a filter screen, a rotating shaft, and an impeller on the inner wall of the pipeline outlet section. When the nutrient solution flows, its impact force drives the impeller to rotate continuously, dynamically stirring the nutrient solution in the pipeline. This effectively disperses and mixes the nutrient solution, ensuring a uniform and stable concentration of the nutrient solution supplied to the seedling tray area.

[0016] 2. This invention features an adjustment mechanism installed on the outer wall of the fixed box, linking a sliding rod at the bottom of the seedling tray with a valve plate. As the seedlings grow and the overall weight of the seedling tray increases, causing it to slide downwards, the sliding rod moves the valve plate downwards synchronously, gradually increasing the overlap area between the valve orifice and the pipeline flow channel. This automatically increases the nutrient solution circulation flow rate according to the seedling's growth stage and weight changes, matching the dynamic water and nutrient requirements of the seedlings at different stages.

[0017] 3. This invention utilizes a driving mechanism to convert the vertical displacement of slider one into the rotation of connecting rod two, which in turn drives the base box to slide downwards along the outer wall of the fixed box via slider two and the limiting rail. When the seedling tray moves downwards due to increased load, the base box can move downwards synchronously, thereby adaptively increasing the vertical distance between the base box and the seedling tray. This provides ample vertical space for the downward growth of seedling roots, effectively avoiding root entrapment and rot caused by limited space, and ensuring normal root development.

[0018] 4. This invention features a rotating shaft (third shaft) within the seedling tray, connecting a connecting rod (third shaft) to a trumpet-shaped plate. When a seedling cup is placed inside, the cup presses down on the connecting rod (third shaft), causing the trumpet-shaped plate to open outwards, providing ample radial space for root growth. When the seedling is removed, the pressure on the connecting rod (third shaft) disappears, and the trumpet-shaped plate automatically retracts, drawing the swollen roots inwards. This design allows space for root expansion during the seedling stage and effectively prevents roots from getting stuck or pulled against the edges of the planting holes during transplanting, significantly reducing the risk of root damage and ensuring a high survival rate after transplanting. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a partial structural diagram of the universal wheel of the present invention; Figure 3 Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of a partial pipeline structure of the present invention; Figure 5 This is an enlarged schematic diagram of point B in section 4; Figure 6 This is a cross-sectional view of the internal structure of the fixed box of the present invention; Figure 7 This is a cross-sectional view of the internal structure of the outer shell of the present invention; Figure 8This is a cross-sectional view of the internal structure of the bottom box of the present invention; Figure 9 This is a partial structural diagram of the placement hole of the present invention; Figure 10 This is an enlarged schematic diagram of point C in number 9.

[0020] The components are as follows: 1. Fixed frame; 2. Base frame; 3. Fixed box; 4. Bottom box; 5. Circulation assembly; 501. Feeding box; 502. Circulation pump; 503. Filter box; 6. Pipeline; 7. Filter screen; 8. Rotating shaft one; 9. Impeller; 10. Spring; 11. Seedling tray; 12. Placement hole; 13. Caster wheel; 14. Slider one; 15. Sliding rod one; 16. Adjustment mechanism; 161. Outer shell; 162. Valve plate; 163. Valve hole; 17. Drive mechanism; 171. Bracket; 172. Sliding rod two; 173. Ball; 18. Connecting rod two; 19. Rotating shaft two; 20. Slider two; 21. Limiting rail; 22. Rotating shaft three; 23. Connecting rod three; 24. Horn plate; 25. Fixed plate. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see the appendix Figure 1 -Appendix Figure 10 This invention provides a multi-purpose experimental device for agricultural breeding and seedling raising, including a fixed frame 1, a base frame 2 fixedly connected to the outer wall of the fixed frame 1, a circulation component 5 provided on the upper surface of the base frame 2, a fixed box 3 fixedly connected to the outer wall of the fixed frame 1, a base box 4 slidably connected to the outer wall of the fixed box 3, a pipe 6 connected to the circulation component 5, the pipe 6 communicating with the fixed box 3, a filter screen 7 fixedly provided on the outer wall of the water outlet section of the pipe 6, a rotating shaft 8 rotatably connected to the outer wall of the filter screen 7, an impeller 9 fixedly connected to the outer wall of the rotating shaft 8, and the impeller 9 located inside the water outlet section of the pipe 6.

[0023] Specifically, the fixed frame 1 serves as the supporting base of the entire device. A base frame 2 is fixedly connected to its lower outer wall, providing stable support for the circulation component 5. A fixed box 3 is fixedly connected to the middle outer wall of the fixed frame 1. The fixed box 3 serves as the core supporting structure for seedling cultivation. A bottom box 4 is slidably mounted on the bottom of the outer wall of the fixed box 3, used to store the nutrient solution required for seedling cultivation. The circulation component 5 is mounted on the upper surface of the base frame 2 and is connected to the fixed box 3 via a pipe 6, forming a closed-loop circulation path for the nutrient solution. A filter screen 7 is fixedly installed on the inner wall of the outlet section of the pipe 6. To filter solid impurities in the circulating nutrient solution, a rotating shaft 8 is rotatably connected to the center of the filter screen 7. Multiple impellers 9 are fixedly connected to the outer wall of the rotating shaft 8 along the circumference. The impellers 9 are placed inside the flow channel of the water outlet section of the pipe 6. When the circulation component 5 drives the nutrient solution to flow in the pipe 6, the flowing nutrient solution impacts the impellers 9, causing the impellers 9 to rotate around the rotating shaft 8. The rotating impellers 9 can continuously stir the nutrient solution in the pipe 6, so as to achieve full mixing and dispersion of the nutrient solution, avoid the sedimentation and stratification of nutrients in the nutrient solution, and ensure that the concentration of the nutrient solution supplied to the seedling area is uniform and stable.

[0024] The circulation assembly 5 includes a circulation pump 502. The output end of the circulation pump 502 is fixedly connected to a feeding box 501. The outer wall of the feeding box 501 is connected to a pipe 6 on the water outlet side. The input end of the circulation pump 502 is fixedly connected to a filter box 503. The filter box 503 is connected to a pipe 6 on the water inlet side. The feeding box 501, the circulation pump 502, and the filter box 503 are all fixedly installed on the upper surface of the base frame 2.

[0025] Specifically, the circulation component 5 includes a feeding tank 501, a circulation pump 502, and a filter box 503. The feeding tank 501, circulation pump 502, and filter box 503 are all fixedly installed on the upper surface of the base frame 2. The circulation pump 502 provides power for the circulation of the nutrient solution. The output end of the circulation pump 502 is fixedly connected to the inlet of the feeding tank 501, and the outlet of the feeding tank 501 is connected to the water outlet section of the pipeline 6. The feeding tank 501 is used to add nutrients, plant growth regulators, and other materials during the experiment. New materials can be added directly with the circulating liquid. The nutrient solution is then introduced into the circulation channel to achieve real-time replenishment and uniform mixing of nutrients. The input end of the circulation pump 502 is fixedly connected to the outlet of the filter box 503, and the inlet of the filter box 503 is connected to the water inlet section of the pipeline 6. The filter box 503 is used to perform multi-stage filtration on the returned nutrient solution to remove solid impurities such as root detachment and substrate residue carried in the nutrient solution, so as to prevent impurities from entering the circulation pump 502 and causing wear or damage to the equipment. At the same time, it ensures the cleanliness of the circulating nutrient solution and reduces the risk of soil-borne diseases during the seedling process.

[0026] The inside of the fixed box 3 is slidably connected to a seedling tray 11, and the inside of the seedling tray 11 is provided with a placement hole 12, which is stepped.

[0027] Specifically, a seedling tray 11 is slidably mounted inside the fixed box 3. The seedling tray 11 can slide smoothly in the vertical direction along the inner wall of the fixed box 3. The seedling tray 11 has multiple vertically penetrating placement holes 12 inside. The placement holes 12 have a stepped structure, with the upper diameter of the placement hole 12 being larger than the lower diameter, forming a limiting step for supporting the seedling cups. This can stably limit the seedling cups and prevent them from tipping over or shifting during the seedling process, thus ensuring the continuity and stability of the seedling operation.

[0028] A slider 14 is fixedly connected to the lower surface of the seedling tray 11, and a sliding rod 15 is fixedly connected to the lower surface of the slider 14. An adjustment mechanism 16 is provided on the outer wall of the fixed box 3.

[0029] Specifically, a slider 14 is fixedly connected to the lower surface of the seedling tray 11. The outer wall of the slider 14 slides against the inner wall of the fixed box 3, ensuring the smoothness of the sliding process of the seedling tray 11 and avoiding deviation or jamming. A sliding rod 15 is fixedly connected to the center of the lower surface of the slider 14. The sliding rod 15 extends downward in the vertical direction. An adjustment mechanism 16 is installed on the outer wall of the fixed box 3 at the position corresponding to the sliding rod 15. As the seedlings in the seedling tray 11 continue to grow, the overall weight of the seedlings and seedling substrate continues to increase, causing the seedling tray 11 to slide downward along the inner wall of the fixed box 3. The seedling tray 11 simultaneously drives the slider 14 to slide downward in the vertical direction. The slider 14 then drives the sliding rod 15 to move downward in sync. The movement of the sliding rod 15 can drive the adjustment mechanism 16 to move synchronously, realizing adaptive adjustment of the nutrient solution circulation flow rate in the pipeline 6.

[0030] The regulating mechanism 16 includes a housing 161 and a valve plate 162. The outer wall of the housing 161 is fixedly connected to the outer wall of the fixed box 3. The outer wall of the slide rod 15 is slidably connected to the inside of the housing 161. The bottom end of the slide rod 15 is fixedly connected to the valve plate 162. The valve plate 162 slides against the outer wall of the pipe 6. A valve hole 163 is opened inside the valve plate 162. The pipe 6 is fixedly connected to the housing 161.

[0031] Specifically, the regulating mechanism 16 includes a housing 161 and a valve plate 162. One outer wall of the housing 161 is fixedly connected to the outer wall of the fixed box 3. A vertical sliding cavity is formed inside the housing 161. The outer wall of the slide rod 15 slides against the inner wall of the sliding cavity. The bottom end of the slide rod 15 extends into the interior of the sliding cavity and is fixedly connected to the upper surface of the valve plate 162. The side wall of the valve plate 162 slides against the inner wall of the housing 161. One side of the valve plate 162 is tightly fitted against the outer wall of the pipe 6. The valve plate 162 has a transversely penetrating valve hole 163 inside. The pipe 6 passes through the inside of the outer shell 161, and the flow channel of the pipe 6 intersects with the sliding path of the valve plate 162. When the slide rod 15 drives the valve plate 162 to move downward in the vertical direction, the overlapping area of ​​the valve hole 163 in the valve plate 162 and the flow channel of the pipe 6 gradually increases, and the effective flow cross-sectional area of ​​the pipe 6 increases accordingly, thereby realizing the adaptive increase of the nutrient solution circulation flow rate and accurately matching the ever-increasing water and nutrient requirements during the seedling growth process.

[0032] The fixed box 3 is internally fixedly connected to a rotating shaft 19. The outer wall of the rotating shaft 19 is rotatably connected to a connecting rod 18. The fixed box 3 is internally provided with a drive mechanism 17. The drive mechanism 17 is in contact with the connecting rod 18 and the slider 14. The end of the connecting rod 18 away from the drive mechanism 17 is fixedly connected to a slider 20. The outer wall of the slider 20 is slidably connected to a limit rail 21. The lower surface of the limit rail 21 is fixedly connected to the inner bottom wall of the bottom box 4.

[0033] Specifically, a rotating shaft 19 is fixedly connected inside the fixed box 3. The rotating shaft 19 is arranged horizontally, and a connecting rod 18 is rotatably connected to the outer wall of the rotating shaft 19. The connecting rod 18 can rotate around the rotating shaft 19. A drive mechanism 17 is installed inside the fixed box 3 at the positions corresponding to the slider 14 and the connecting rod 18. The two ends of the drive mechanism 17 are tightly fitted to the inclined surface of the slider 14 and the upper arm of the connecting rod 18, respectively. A slider 20 is fixedly connected to the end of the connecting rod 18 away from the drive mechanism 17. A limit rail 21 is slidably mounted on the outer wall of the slider 20. The lower surface of the limit rail 21 is fixedly connected to... Connected to the inner bottom wall of the base box 4, when the slider 14 moves downward with the seedling tray 11, the drive mechanism 17 pushes the connecting rod 18 to rotate around the rotating shaft 19. The rotating shaft 19 provides stable support for the rotation of the connecting rod 18. When the connecting rod 18 rotates, the slider 20 at its end slides along the inner wall of the limiting rail 21, and then drives the base box 4 to slide downward along the outer wall of the fixed box 3 through the limiting rail 21. This achieves an adaptive increase in the distance between the base box 4 and the seedling tray 11, providing sufficient vertical space for the downward growth of the seedling roots, avoiding root congestion and rot caused by restricted root growth, and ensuring the normal development of the seedlings.

[0034] The drive mechanism 17 includes a bracket 171 and a slide bar 172. The bracket 171 is fixedly connected inside the fixed box 3. The slide bar 172 is slidably connected to the bracket 171. Balls 173 are fixedly connected to both ends of the slide bar 172. The outer walls of the balls 173 are respectively attached to the outer walls of the connecting rod 18 and the slider 14.

[0035] Specifically, the drive mechanism 17 includes a bracket 171, a second slide rod 172, and two balls 173. The bracket 171 is fixedly connected inside the fixed box 3. A horizontally penetrating guide hole is opened at the center of the bracket 171. The outer wall of the second slide rod 172 slides against the inner wall of the guide hole. The bracket 171 provides stable guidance and support for the horizontal sliding of the second slide rod 172. Balls 173 are rotatably connected to both ends of the second slide rod 172. The outer walls of the two balls 173 are tightly fitted against the lower surface of the first slider 14 and the upper arm of the second connecting rod 18, respectively. When the first slider 14... 4. As the seedling tray 11 moves downward, the inclined surface of slider 14 presses against the corresponding ball 173. The ball 173 pushes the slide rod 172 to slide horizontally along the guide hole of the bracket 171. Simultaneously, the ball 173 at the other end of the slide rod 172 presses against the upper arm of the connecting rod 18, thereby pushing the connecting rod 18 to rotate around the pivot 19. This achieves a stable transmission of the vertical displacement of slider 14 to the rotation of the connecting rod 18. The rotating connection structure of the ball 173 can significantly reduce the frictional resistance during the transmission process, ensuring the smoothness of the transmission action and avoiding jamming failure.

[0036] A fixing plate 25 is fixedly connected to the outer wall of the fixing frame 1, and a spring 10 is fixedly connected to the outer wall of the fixing plate 25. The top end of the spring 10 is fixedly connected to the lower surface of the base box 4.

[0037] Specifically, a fixing plate 25 is fixedly connected to the lower outer wall of the fixing frame 1. The fixing plate 25 is located directly below the bottom box 4. Multiple springs 10 are fixedly connected to the upper surface of the fixing plate 25. The multiple springs 10 are evenly arranged in the vertical direction. The top of the springs 10 is fixedly connected to the lower surface of the bottom box 4. The springs 10 can provide stable elastic support for the bottom box 4, limit the downward sliding stroke of the bottom box 4, and prevent the bottom box 4 from sliding too much and falling off. At the same time, when the seedling experiment is completed and the load in the seedling tray 11 is removed, the elastic restoring force of the springs 10 can drive the bottom box 4 to slide upward and reset along the outer wall of the fixing box 3, preparing for the next seedling experiment, ensuring the reusability of the device, and reducing the cost of using the experimental equipment.

[0038] The outer wall of the seedling tray 11 is rotatably connected to the rotating shaft 22. The outer wall of the rotating shaft 22 is fixedly connected to the connecting rod 23 and the trumpet plate 24. The trumpet plate 24 is located on the lower side of the placement hole 12, and the connecting rod 23 is located inside the placement hole 12.

[0039] Specifically, a rotating shaft 22 is fixedly connected inside the seedling tray 11. The rotating shaft 22 is arranged horizontally, and a connecting rod 23 and a trumpet plate 24 are fixedly connected to its outer wall. The connecting rod 23 extends into the internal cavity of the placement hole 12, and the trumpet plate 24 extends to the lower side of the placement hole 12. When a seedling cup containing seedlings is placed into the placement hole 12, the bottom of the seedling cup presses down on the connecting rod 23, causing the connecting rod 23 to rotate around the rotating shaft 22. The rotating shaft 22 simultaneously drives the trumpet plate 24 to rotate, causing the trumpet plate 24 to rotate. 4. The outward opening provides ample radial space for the downward growth of the seedling roots. When the seedling experiment is completed and the seedlings need to be removed, the seedling cup is pulled upward. The downward pressure of the seedling cup on the connecting rod 23 disappears, and the trumpet plate 24 rotates in the opposite direction around the rotating shaft 22 under its own gravity, automatically closing into a trumpet-shaped structure. The closed trumpet plate 24 can pull the enlarged roots of the seedling inward, avoiding the roots from getting stuck or pulled on the edge of the placement hole 12 during the seedling removal process, effectively preventing root damage and ensuring the survival rate of the seedlings after transplanting.

[0040] A caster wheel 13 is fixedly connected to the lower surface of the fixed frame 1.

[0041] Specifically, multiple casters 13 are fixedly connected to the lower surface of the fixed frame 1. The casters 13 are evenly distributed at the four corners of the bottom of the fixed frame 1. The casters 13 have a built-in locking structure. The device can be easily moved by the casters 13 to adapt to the experimental layout needs of different areas of the laboratory. After moving to the target position, the casters 13 can be locked by the locking structure to ensure the stability of the device during the experiment. This greatly improves the flexibility and adaptability of the device to different scenarios and meets the needs of agricultural breeding and seedling experiments in multiple scenarios.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-purpose experimental device for agricultural breeding and seedling raising, comprising a fixed frame (1), characterized in that, The outer wall of the fixed frame (1) is fixedly connected to the base frame (2), and the upper surface of the base frame (2) is provided with a circulation component (5). The outer wall of the fixed frame (1) is fixedly connected to the fixed box (3), and the outer wall of the fixed box (3) is slidably connected to the bottom box (4). The circulation component (5) is connected to the pipeline (6), and the pipeline (6) is connected to the fixed box (3). The outer wall of the outlet section of the pipeline (6) is fixedly provided with a filter screen (7), and the outer wall of the filter screen (7) is rotatably connected to a rotating shaft (8). The outer wall of the rotating shaft (8) is fixedly connected to an impeller (9), and the impeller (9) is located inside the outlet section of the pipeline (6).

2. The multi-purpose experimental device for agricultural breeding and seedling raising according to claim 1, characterized in that, The circulation assembly (5) includes a circulation pump (502), the output end of which is fixedly connected to a feeding box (501), the outer wall of which is connected to a pipe (6) on the water outlet side, the input end of which is fixedly connected to a filter box (503), the filter box (503) being connected to a pipe (6) on the water inlet side, and the feeding box (501), circulation pump (502), and filter box (503) are all fixedly installed on the upper surface of the base frame (2).

3. The multi-purpose experimental device for agricultural breeding and seedling raising according to claim 2, characterized in that, The fixed box (3) is slidably connected to a seedling tray (11), and the seedling tray (11) has a placement hole (12) inside, which is stepped.

4. The multi-purpose experimental device for agricultural breeding and seedling raising according to claim 3, characterized in that, The lower surface of the seedling tray (11) is fixedly connected to a slider (14), the lower surface of the slider (14) is fixedly connected to a sliding rod (15), and the outer wall of the fixed box (3) is provided with an adjustment mechanism (16).

5. The multi-purpose experimental device for agricultural breeding and seedling raising according to claim 4, characterized in that, The adjusting mechanism (16) includes a housing (161) and a valve plate (162). The outer wall of the housing (161) is fixedly connected to the outer wall of the fixed box (3). The outer wall of the slide rod (15) is slidably connected to the inside of the housing (161). The bottom end of the slide rod (15) is fixedly connected to the valve plate (162). The pipe (6) passes through the housing (161) and cooperates with the valve plate (162). The valve plate (162) has a valve hole (163) inside. The pipe (6) is fixedly connected to the housing (161).

6. The multi-purpose experimental device for agricultural breeding and seedling raising according to claim 5, characterized in that, The fixed box (3) is fixedly connected to the second rotating shaft (19), and the outer wall of the second rotating shaft (19) is rotatably connected to the second connecting rod (18). The fixed box (3) is provided with a driving mechanism (17), which is in contact with the second connecting rod (18) and the first slider (14). The end of the second connecting rod (18) away from the driving mechanism (17) is fixedly connected to the second slider (20). The outer wall of the second slider (20) is slidably connected to a limit rail (21), and the lower surface of the limit rail (21) is fixedly connected to the inner bottom wall of the bottom box (4).

7. The multi-purpose experimental device for agricultural breeding and seedling raising according to claim 6, characterized in that, The drive mechanism (17) includes a bracket (171) and a second slide rod (172). The bracket (171) is fixedly connected inside the fixed box (3). The bracket (171) is slidably connected to the second slide rod (172). Both ends of the second slide rod (172) are fixedly connected to a ball (173). The outer wall of the ball (173) is respectively attached to the outer wall of the second connecting rod (18) and the first slider (14).

8. The multi-purpose experimental device for agricultural breeding and seedling raising according to claim 7, characterized in that, A fixing plate (25) is fixedly connected to the outer wall of the fixing frame (1), and a spring (10) is fixedly connected to the outer wall of the fixing plate (25). The top end of the spring (10) is fixedly connected to the lower surface of the bottom box (4).

9. The multi-purpose experimental device for agricultural breeding and seedling raising according to claim 3, characterized in that, The outer wall of the seedling tray (11) is rotatably connected to the rotating shaft three (22). The outer wall of the rotating shaft three (22) is fixedly connected to the connecting rod three (23) and the horn plate (24). The horn plate (24) is located on the lower side of the placement hole (12), and the connecting rod three (23) is located inside the placement hole (12).

10. The multi-purpose experimental device for agricultural breeding and seedling raising according to claim 1, characterized in that, The lower surface of the fixed frame (1) is fixedly connected with casters (13).

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