CN216931298U - Automatic seedling raising device for multilayer soilless culture - Google Patents

Abstract

The utility model discloses an automatic seedling raising device for multilayer soilless culture, which comprises a plurality of seedling raising frames and a water tank, wherein a connecting structure and an automatic drainage mechanism are arranged between two adjacent seedling raising frames, an environment index monitoring mechanism is arranged on the inner wall of one side of each seedling raising frame, a camera is arranged above the inner wall of one side of each seedling raising frame, LED light supplementing lamps are horizontally arranged on two sides of the top of each seedling raising frame, a second water pump is arranged in the middle of one side of the bottom of the water tank, a water outlet of the second water pump is communicated with a water supply pipe, the water supply pipe extends out of the water tank, a spray pipe is communicated with the side face of the water supply pipe, and a water feeding mechanism and a water return mechanism are arranged between the water tank and the seedling raising frames. The utility model can realize automatic irrigation, has richer irrigation forms and meets the standard environment required by seedling culture; can realize standardized seedling culture indoors or under the condition of no illumination, has the environment monitoring function, and adopts modular assembly and simple assembly for the seedling culture rack.

Description

Automatic seedling raising device for multilayer soilless culture

Technical Field

The utility model relates to the technical field of agriculture, in particular to an automatic seedling raising device for multilayer soilless culture.

Background

China has small cultivated land area, large population, particularly gradually improved urbanization rate, very limited land resources and great proportion of human cost in agricultural production and operation, so the soilless culture technology is gradually used in the planting industry, and the soilless culture refers to a culture method in which water, grass carbon or medium such as forest leaf rotting soil, vermiculite and the like are used as a matrix for fixing plants of plant roots, and the plant roots can directly contact with nutrient solution.

The existing seedling production has low standardization degree, resources such as light sources and the like are wasted, the output efficiency in unit time is low, the main processes depend on manual operation, the unit output cost is increased after the integration, the popularization is not facilitated, and the safe and efficient production of high-quality clean vegetables is difficult to meet. Therefore, it is necessary to develop a device with high automation degree and capable of performing soilless culture.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an automatic seedling raising device for multilayer soilless culture, and aims to solve the technical problem in the background technology.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an automatic seedling raising device for multilayer soilless culture, which comprises a plurality of seedling raising frames and a water tank, and a connecting structure and an automatic drainage mechanism are arranged between two adjacent seedling racks, a tidal seedling bed for seedling cultivation is arranged at the bottom in each seedling rack, seedling culture hole trays are placed on the seedling bed of the seedling culture tide, an environment index monitoring mechanism is arranged on the inner wall of one side of the seedling culture frame, a camera is arranged above the inner wall of one side of the seedling raising frame, LED light supplement lamps are horizontally arranged on both sides of the top in the seedling raising frame, the middle part of one side of the bottom in the water tank is provided with a second water pump, the water outlet of the second water pump is communicated with a water supply pipe, the water supply pipe extends out of the water tank and is communicated with a spray pipe on the side surface, the spray pipe is provided with a plurality of spray pipes and respectively extends into the seedling raising frames, the shower is located the middle part at top in the nursery cabinet, be equipped with water feeding mechanism and return water mechanism between water tank and a plurality of nursery cabinets.

By arranging the second water pump and the spray pipe, the second water pump is started to pump the liquid in the water tank to be sprayed to the seedling raising hole tray in the seedling raising frame through the water supply pipe and the spray pipe, so that spray irrigation can be carried out; through being provided with camera and LED light filling lamp, can remote real time monitoring grow seedlings the growth condition through the camera, for the standardized on-the-spot reference that provides of growing seedlings, LED light filling lamp can carry out the light filling to the plant as required by the environment, makes to grow seedlings and does not receive the environmental restriction, can realize the standardized seedling of growing seedlings under indoor or no illumination's condition.

In a preferred scheme, connection structure includes the installation pole, the mounting hole has all been seted up in the top four corners of nursery cabinet, the installation pole is equipped with four and respectively vertical welding in the bottom four corners of nursery cabinet, installation pole and mounting hole looks adaptation, the bottom of installation pole is inlayed and is had the second magnet, bottom is inlayed and is had first magnet in the mounting hole, first magnet and second magnet magnetism attract mutually.

Through being provided with connection structure, insert the mounting hole at another seedling raising rack top with the installation pole alignment of a seedling raising rack bottom, first magnet and second magnet magnetism attract mutually will install the pole tightly inhale in the mounting hole to link together two seedling raising racks, the seedling raising rack adopts the modularization assembly and assembles portably, can increase or reduce the number of piles of seedling raising rack according to site environment and output requirement.

In a preferred scheme, the automatic drainage mechanism comprises a liquid level sensor and an electric valve, the liquid level sensor is installed below the inner wall of one side of the seedling raising frame, the electric valve is installed in the middle of the bottom of the seedling raising frame, a communicating port is formed in the middle of the top of the seedling raising frame, and the electric valve is communicated with the communicating port.

Through being provided with automatic drainage mechanism, monitor the irrigation water level in the nursery cabinet through level sensor, after level sensor monitored the nursery cabinet in the upper strata water level has been full, valve on the branch pipe is closed and is stopped irrigating in the control box control, after the irrigation time that the irrigation time reaches the standard satisfied irrigation demand, control box control electric valve opened through the intercommunication mouth with the automatic lower floor emission of the unnecessary water of upper nursery cabinet to realize accurate automatic irrigation.

In a preferred scheme, it is a plurality of nursery cabinet is along vertical connection in an organic whole, the water tank is located a plurality of nursery cabinets's below, the top level intercommunication of the outside one side of water tank has the inlet tube, the below level intercommunication of the outside one side of water tank has the drain pipe, all install the valve on inlet tube and the drain pipe, and the equal vertical welding in nursery cabinet bottom four corners of below has the supporting leg.

Water can be added into the water tank through the water inlet pipe, and water used for multiple times in the water tank can be drained through the water drainage pipe.

In a preferred scheme, the environment index monitoring mechanism comprises a pH sensor, a temperature and humidity sensor and a light intensity sensor, the pH sensor is installed below the inner wall of one side of the seedling raising frame, the temperature and humidity sensor and the light intensity sensor are installed above the inner wall of one side of the seedling raising frame, and the temperature and humidity sensor and the light intensity sensor are arranged side by side.

Through being provided with environmental index monitoring mechanism, accessible pH sensor, temperature and humidity sensor and illuminance sensor monitor the pH of irrigation liquid in the frame of growing seedlings, the humiture and the illumination intensity of environment to give the control box with data transmission, as the reference basis of standardized growing seedlings, the staff can adjust in real time according to the monitoring data, can guide the operation of growing seedlings of standard better.

In a preferred scheme, the water feeding mechanism comprises a first water pump, the first water pump is installed on one side of the bottom in the water tank, a water outlet of the first water pump is communicated with a water feeding main pipe, the water feeding main pipe extends out of the water tank and is horizontally communicated with water feeding branch pipes on the side faces, the water feeding branch pipes are provided with a plurality of water feeding branch pipes which are respectively communicated with the tops of the side faces of the seedling raising frames, and the water feeding branch pipes are provided with valves.

Through being provided with water feeding mechanism, open the liquid that first water pump pumped in the water intaking case and add the frame of growing seedlings by last water branch again through last water header, can carry out morning and evening tides formula and irrigate, the cooperation is irrigated the formula and is accomplished the automatic irrigation of growing seedlings, and irrigates the form and richen more to can control the required humiture of growing seedlings well, satisfy the required standard environment of growing seedlings.

In a preferred scheme, the water return mechanism comprises a water return main pipe, the end of the water return main pipe is communicated with the upper portion of the side face of the water tank, the side face of the water return main pipe is horizontally communicated with a water return branch pipe, the water return branch pipes are provided with a plurality of water return branch pipes and are respectively communicated with the bottoms of the side faces of the seedling raising frames, and valves are arranged on the water return branch pipes.

Through being provided with return water mechanism, after the irrigation time who grows seedlings reaches, open the valve on the return water branch pipe, liquid in the frame of growing seedlings collects in the return water main pipe through the return water branch pipe and gets back to the water tank again, and irrigation water in the water tank can used repeatedly, and the accurate irrigation time that can automatic control grow seedlings avoids appearing irrigation time overlength or the problem of short excessively.

In a preferred scheme, the outside of water tank is equipped with control box and water tank and sets up side by side, the control box is connected with first water pump, second water pump, pH sensor, temperature and humidity sensor, illuminance sensor, camera, LED light filling lamp, level sensor and electric valve electricity equally, install wireless transmission module and timing module in the control box.

By arranging the control box, the control box can automatically open or close irrigation, and can open or close irrigation in time periods or at regular time; the light supplement lamp can be automatically turned on or off, and can be turned on or turned off in different time periods or at regular time; the data of the pH sensor, the temperature and humidity sensor, the illuminance sensor, the camera and the liquid level sensor are transmitted to the control box, and the electric valve can be automatically opened or closed according to the data of the liquid level sensor; the wireless transmission module is connected with control software of a mobile phone end of a worker, the LED light supplement lamp, each sensor, camera data and videos can be displayed on a control software platform, the mobile phone end can be used for controlling, and the timing module is used for timing the irrigation time.

According to the automatic seedling raising device for the multilayer soilless culture, provided by the utility model, the automatic irrigation of seedling raising can be completed by utilizing tide type irrigation to be matched with spray irrigation, and the irrigation mode is richer, so that the temperature and humidity required by seedling raising can be well controlled, and the standard environment required by seedling raising is met; the LED light supplement lamp can supplement light to plants according to environmental requirements, so that the seedling culture is not limited by the environment, and the standardized seedling culture can be realized indoors or under the condition of no illumination; the system has an environment monitoring function, and workers can adjust in real time according to monitoring data, so that the standard seedling raising operation can be better guided; the seedling raising frame is assembled in a modularized manner and is simple and convenient to assemble, and the number of layers of the seedling raising frame can be increased or reduced according to the requirements of site environment and yield.

Drawings

FIG. 1 is a schematic structural view of an automatic seedling raising device for multilayer soilless culture provided by the utility model.

Fig. 2 is a schematic view of the inside of a seedling raising frame of the automatic seedling raising device for multilayer soilless culture provided by the utility model.

Fig. 3 is a schematic view of the inside of a water tank of the automatic seedling raising device for multi-layer soilless culture provided by the utility model.

FIG. 4 is a schematic view of the disassembled nursery cabinet of the automatic seedling raising device for multi-layer soilless culture provided by the utility model.

Fig. 5 is a schematic partial cross-sectional view of an automatic seedling raising device for multi-layer soilless culture provided by the utility model.

In the drawings: 1. mounting holes; 2. a seedling raising frame; 3. supporting legs; 4. a control box; 5. a water tank; 6. a shower pipe; 7. a water supply branch pipe; 8. a water supply pipe; 9. a water feeding main pipe; 10. a return water branch pipe; 11. a water return main pipe; 12. an electrically operated valve; 13. a camera; 14. a tidal seedbed for seedling; 15. seedling raising hole trays; 16. a pH sensor; 17. a temperature and humidity sensor; 18. a light intensity sensor; 19. a liquid level sensor; 20. a first water pump; 21. a water inlet pipe; 22. a second water pump; 23. a drain pipe; 24. a communication port; 25. mounting a rod; 26. a first magnet; 27. a second magnet; 28. LED light filling lamp.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-5, an automatic seedling raising device for multilayer soilless culture comprises a seedling raising frame 2 and a water tank 5, wherein openings are respectively formed above two opposite sides of the seedling raising frame 2, a plurality of seedling raising frames 2 are arranged, a connecting structure and an automatic drainage mechanism are arranged between every two adjacent seedling raising frames 2, a seedling raising tide seedbed 14 is arranged at the bottom in each seedling raising frame 2, seedling raising hole trays 15 are placed on the seedling raising tide seedbed 14, (sponge seedling raising or rock wool seedling raising can be directly placed in the seedling raising tide seedbed 14), an environment index monitoring mechanism is arranged on the inner wall of one side of each seedling raising frame 2, a camera 13 is arranged above the inner wall of one side of each seedling raising frame 2, LED supplementary lighting lamps 28 are horizontally arranged on two sides of the top in each seedling raising frame 2, a second water supply pipe 22 is arranged in the middle of one side of the bottom in the water tank 5, a water outlet of the second water pump 22 is communicated with a water supply pipe 8, the water pump 8 extends out of the water tank 5, and a spray pipe 6 is communicated with the side, the shower 6 is equipped with a plurality ofly and stretches into a plurality of nursery cabinet 2 insides respectively, and the shower 6 is located the middle part at top in the nursery cabinet 2, is equipped with water feeding mechanism and return water mechanism between water tank 5 and a plurality of nursery cabinet 2. When irrigation is needed, a second water pump 22 is started to pump liquid in the water tank 5, the liquid is sprayed to the seedling culture hole tray 15 in the seedling culture frame 2 through the water supply pipe 8 and the spraying pipe 6, and spray irrigation can be carried out; can long-range real time monitoring grow seedlings the growth condition through camera 13, for the standardized scene reference basis that provides of growing seedlings, LED light filling lamp 28 can carry out the light filling to the plant according to the environmental requirement, makes to grow seedlings not restricted by the environment, can realize the standardized seedling of growing seedlings under indoor or no illumination condition.

Referring to fig. 1-5, in a preferred embodiment, the connecting structure includes mounting rods 25, four mounting holes 1 are opened at four corners of the top of the seedling raising frame 2, the four mounting rods 25 are vertically welded to four corners of the bottom of the seedling raising frame 2, the mounting rods 25 are matched with the mounting holes 1, second magnets 27 are embedded at the bottom ends of the mounting rods 25, first magnets 26 are embedded at the bottoms of the mounting holes 1, and the first magnets 26 and the second magnets 27 are magnetically attracted to each other. The installation rod 25 at the bottom of one seedling raising frame 2 is aligned with the installation hole 1 at the top of the other seedling raising frame 2 to be inserted, the first magnet 26 and the second magnet 27 are magnetically attracted to tightly attract the installation rod 25 in the installation hole 1, so that the two seedling raising frames 2 are connected together, the seedling raising frames 2 are assembled in a modularized mode, the assembly is simple and convenient, and the number of layers of the seedling raising frames 2 can be increased or reduced according to the requirements of site environment and yield.

Referring to fig. 1-5, in a preferred embodiment, the automatic drainage mechanism comprises a liquid level sensor 19 and an electric valve 12, the liquid level sensor 19 is installed below the inner wall of one side of the seedling raising frame 2, the electric valve 12 is installed in the middle of the bottom of the seedling raising frame 2, a communication port 24 is formed in the middle of the top of the seedling raising frame 2, and the electric valve 12 is communicated with the communication port 24. Monitor the irrigation water level in the seedling raising frame 2 through level sensor 19, after liquid level sensor 19 monitored the seedling raising frame 2 on upper strata in water level had been full of, valve on control box 4 control water supply branch pipe 7 is closed and is stopped irrigating, after the irrigation time that the irrigation time reaches the standard satisfied irrigation demand, control box 4 control electric valve 12 opened through intercommunication mouth 24 with the automatic lower floor discharge of the unnecessary water of upper strata seedling raising frame 2 to realize accurate automatic irrigation.

Referring to fig. 1-5, in a preferred embodiment, a plurality of seedling raising frames 2 are vertically connected into a whole, a water tank 5 is located below the plurality of seedling raising frames 2, a water inlet pipe 21 is horizontally communicated with the upper part of one side outside the water tank 5, a water outlet pipe 23 is horizontally communicated with the lower part of one side outside the water tank 5, valves are installed on the water inlet pipe 21 and the water outlet pipe 23, and supporting legs 3 are vertically welded at four corners of the bottom of the seedling raising frame 2 at the lowest part.

Referring to fig. 1 to 5, in a preferred embodiment, the environment index monitoring mechanism comprises a pH sensor 16, a temperature and humidity sensor 17 and a light intensity sensor 18, wherein the pH sensor 16 is installed below the inner wall of one side of the seedling rack 2, the temperature and humidity sensor 17 and the light intensity sensor 18 are installed above the inner wall of one side of the seedling rack 2, and the temperature and humidity sensor 17 and the light intensity sensor 18 are arranged side by side. In the seedling raising process, the pH of irrigation liquid in the seedling raising frame 2, the temperature and humidity and the illumination intensity of the environment can be monitored through the pH sensor 16, the temperature and humidity sensor 17 and the illumination sensor 18, data are transmitted to the control box 4 and serve as a reference basis for standardized seedling raising, and workers can adjust in real time according to the monitoring data and can better guide standard seedling raising operation.

Referring to fig. 1-5, in a preferred embodiment, the watering mechanism comprises a first water pump 20, the first water pump 20 is installed on one side of the bottom in the water tank 5, a water outlet of the first water pump 20 is communicated with a main watering pipe 9, the main watering pipe 9 extends out of the water tank 5, the side surfaces of the main watering pipe 9 are horizontally communicated with branch watering pipes 7, the branch watering pipes 7 are provided with a plurality of branches and are respectively communicated with the tops of the side surfaces of the seedling raising frames 2, and valves are installed on the branch watering pipes 7. Open the liquid in the first water pump 20 extraction water tank 5 simultaneously and add the frame of growing seedlings 2 by last water branch pipe 7 again through last water header pipe 9 in, can carry out the morning and evening tides formula and irrigate, the cooperation is irrigated the automatic irrigation that can accomplish growing seedlings by the sprinkling irrigation formula, and irrigates the form and is abundanter to can control the required humiture of growing seedlings well, satisfy the required standard environment of growing seedlings.

Referring to fig. 1-5, in a preferred embodiment, the water return mechanism comprises a water return main pipe 11, the end of the water return main pipe 11 is communicated with the upper part of the side surface of the water tank 5, a water return branch pipe 10 is horizontally communicated with the side surface of the water return main pipe 11, the water return branch pipe 10 is provided with a plurality of water return branch pipes and is respectively communicated with the bottoms of the side surfaces of the seedling raising frames 2, and valves are respectively arranged on the plurality of water return branch pipes 10. After the irrigation time of growing seedlings reaches, open the valve on the return branch pipe 10, in the liquid in the seedling raising frame 2 collected the return water house steward 11 in and got back to water tank 5 again through return branch pipe 10, irrigation water in the water tank 5 can used repeatedly, can automatic control the accurate irrigation time of growing seedlings, avoids appearing the problem of irrigation time overlength or overlength.

Referring to fig. 1 and 3, in a preferred embodiment, a control box 4 is disposed outside a water tank 5, the control box 4 and the water tank 5 are disposed side by side, the control box 4 is electrically connected to a first water pump 20, a second water pump 22, a pH sensor 16, a temperature and humidity sensor 17, a light intensity sensor 18, a camera 13, an LED fill light 28, a liquid level sensor 19 and an electric valve 12, and a wireless transmission module and a timing module are installed in the control box 4. The control box can automatically open or close irrigation, can open or close irrigation in time periods or at regular time; the LED light supplement lamp 28 can be automatically turned on or off, and the LED light supplement lamp 28 can be turned on or turned off in different time periods or at regular time; the data of the pH sensor 16, the temperature and humidity sensor 17, the illuminance sensor 18, the camera 13 and the liquid level sensor 19 are transmitted to the control box 4, and the electric valve 12 can be automatically opened or closed according to the data of the liquid level sensor 19; the wireless transmission module is connected with control software at a mobile phone end of a worker, and the timing module times the irrigation time.

The working principle is as follows: when the seedling raising frame 2 is used, the mounting rod 25 at the bottom of one seedling raising frame 2 is aligned with the mounting hole 1 at the top of the other seedling raising frame 2 to be inserted, the first magnet 26 and the second magnet 27 are magnetically attracted to tightly attract the mounting rod 25 in the mounting hole 1, so that the two seedling raising frames 2 are connected together, the seedling raising frames 2 are assembled in a modularized mode, the assembly is simple and convenient, and the number of layers of the seedling raising frames 2 can be increased or reduced according to the requirements of site environment and yield;

when irrigation is needed, the second water pump 22 is started to pump liquid in the water tank 5, the liquid is sprayed to the seedling culture hole tray 15 in the seedling culture frame 2 through the water supply pipe 8 and the spraying pipe 6, spray irrigation can be carried out, meanwhile, the first water pump 20 is started to pump liquid in the water tank 5, the liquid is fed into the seedling culture frame 2 through the water feeding main pipe 9 and the water feeding branch pipe 7, tide type irrigation can be carried out, automatic irrigation of seedling culture can be completed by matching with spray irrigation, the irrigation forms are richer, the temperature and humidity required by seedling culture can be well controlled, and the standard environment required by seedling culture is met; the timing module is used for timing the irrigation time, when the irrigation time of seedling culture reaches, the valves on the water return branch pipes 10 are opened, liquid in the seedling culture frame 2 is collected into the water return header pipe 11 through the water return branch pipes 10 and then returns to the water tank 5, the irrigation water in the water tank 5 can be reused, the accurate irrigation time of seedling culture can be automatically controlled, and the problem that the irrigation time is too long or too short is avoided;

in the seedling raising process, the pH of irrigation liquid in the seedling raising frame 2, the temperature and humidity of the environment and the illumination intensity can be monitored through the pH sensor 16, the temperature and humidity sensor 17 and the illumination sensor 18, data are transmitted to the control box 4 to serve as reference basis for standardized seedling raising, workers can adjust in real time according to the monitored data, and can better guide standard seedling raising operation; the growth condition of the seedlings can be monitored in real time in a remote mode through the camera 13, a field reference basis is provided for standardized seedlings, the LED light supplement lamp 28 can supplement light to plants according to environmental requirements, the seedlings are not limited by the environment, and the standardized seedlings can be cultivated indoors or under the condition of no illumination;

monitor the irrigation water level in the seedling raising frame 2 through level sensor 19, after liquid level sensor 19 monitored the seedling raising frame 2 on upper strata in water level had been full of, valve on control box 4 control water supply branch pipe 7 is closed and is stopped irrigating, after the irrigation time that the irrigation time reaches the standard satisfied irrigation demand, control box 4 control electric valve 12 opened through intercommunication mouth 24 with the automatic lower floor discharge of the unnecessary water of upper strata seedling raising frame 2 to realize accurate automatic irrigation.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. The substitution may be of partial structures, devices, method steps, or may be a complete solution. The technical solution and the inventive concept according to the present invention should be covered by the protection scope of the present invention with equivalent alternatives or modifications.

Claims (8)

1. The automatic seedling raising device for the multilayer soilless culture comprises seedling raising frames (2) and a water tank (5), and is characterized in that the seedling raising frames (2) are provided with a plurality of seedling raising frames, a connecting structure and an automatic drainage mechanism are arranged between every two adjacent seedling raising frames (2), a seedling raising tide seedbed (14) is installed at the bottom in each seedling raising frame (2), seedling raising hole trays (15) are placed on the seedling raising tide seedbed (14), an environment index monitoring mechanism is arranged on the inner wall of one side of each seedling raising frame (2), a camera (13) is installed above the inner wall of one side of each seedling raising frame (2), LED light supplement lamps (28) are horizontally installed on two sides of the top in each seedling raising frame (2), a second water pump (22) is installed in the middle of one side of the bottom in the water tank (5), a water outlet of the second water pump (22) is communicated with a water supply pipe (8), the water supply pipe (8) extends out of the inside the water tank (5) and is communicated with a spray pipe (6) from the side, shower (6) are equipped with a plurality ofly and stretch into inside a plurality of nursery cabinet (2) respectively, shower (6) are located the middle part at top in nursery cabinet (2), be equipped with water feeding mechanism and return water mechanism between water tank (5) and a plurality of nursery cabinet (2).

2. The automatic seedling raising device for soilless culture of claim 1, wherein the connecting structure comprises mounting rods (25), the four corners of the top of the seedling raising frame (2) are provided with mounting holes (1), the four mounting rods (25) are vertically welded to the four corners of the bottom of the seedling raising frame (2) respectively, the mounting rods (25) are matched with the mounting holes (1), a second magnet (27) is embedded in the bottom end of each mounting rod (25), a first magnet (26) is embedded in the bottom of each mounting hole (1), and the first magnet (26) and the second magnet (27) attract each other magnetically.

3. The automatic seedling raising device for the soilless culture of the multilayer as claimed in claim 1, wherein the automatic drainage mechanism comprises a liquid level sensor (19) and an electric valve (12), the liquid level sensor (19) is installed below the inner wall of one side of the seedling raising frame (2), the electric valve (12) is installed in the middle of the bottom of the seedling raising frame (2), a communication port (24) is formed in the middle of the top of the seedling raising frame (2), and the electric valve (12) is communicated with the communication port (24).

4. The automatic seedling raising device for the soilless culture of the multilayer as claimed in claim 1, wherein the seedling raising frames (2) are vertically connected into a whole, the water tank (5) is located below the seedling raising frames (2), a water inlet pipe (21) is horizontally communicated above one side of the outside of the water tank (5), a water outlet pipe (23) is horizontally communicated below one side of the outside of the water tank (5), valves are installed on the water inlet pipe (21) and the water outlet pipe (23), and the supporting legs (3) are vertically welded at four corners of the bottom of the seedling raising frame (2) at the lowest position.

5. The automatic seedling raising device for the soilless culture of the multilayer as claimed in claim 1, wherein the environment index monitoring mechanism comprises a pH sensor (16), a temperature and humidity sensor (17) and a light intensity sensor (18), the pH sensor (16) is installed below the inner wall of one side of the seedling raising frame (2), the temperature and humidity sensor (17) and the light intensity sensor (18) are installed above the inner wall of one side of the seedling raising frame (2), and the temperature and humidity sensor (17) and the light intensity sensor (18) are arranged side by side.

6. The automatic seedling raising device for the multilayer soilless culture as claimed in claim 1, wherein the water feeding mechanism comprises a first water pump (20), the first water pump (20) is installed on one side of the bottom in the water tank (5), a water outlet of the first water pump (20) is communicated with a water feeding main pipe (9), the water feeding main pipe (9) extends out of the inside of the water tank (5) and is horizontally communicated with a water feeding branch pipe (7) on the side, the water feeding branch pipe (7) is provided with a plurality of water feeding branch pipes and is respectively communicated with the tops of the sides of the seedling raising frames (2), and valves are installed on the plurality of water feeding branch pipes (7).

7. The automatic seedling raising device for the multilayer soilless culture as claimed in claim 1, wherein the water return mechanism comprises a water return main pipe (11), the end of the water return main pipe (11) is communicated with the upper part of the side surface of the water tank (5), the side surface of the water return main pipe (11) is horizontally communicated with a water return branch pipe (10), the water return branch pipe (10) is provided with a plurality of water return branch pipes which are respectively communicated with the bottoms of the side surfaces of the seedling raising frames (2), and valves are mounted on the plurality of water return branch pipes (10).

8. The automatic seedling raising device for the soilless culture of the multilayer as claimed in claim 1, wherein a control box (4) is arranged on the outer side of the outer portion of the water tank (5), the control box (4) and the water tank (5) are arranged side by side, the control box (4) is electrically connected with a first water pump (20), a second water pump (22), a pH sensor (16), a temperature and humidity sensor (17), a light intensity sensor (18), a camera (13), an LED light supplement lamp (28), a liquid level sensor (19) and an electric valve (12), and a wireless transmission module and a timing module are installed in the control box (4).

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