A tobacco seedling raising pond water automatic regulating device

Abstract

This invention discloses an automatic water volume regulation device for tobacco seedling nursery ponds, comprising: a base plate, with a seedling shed mounted on top of the base plate; a water storage tank placed on top of the base plate, with a water volume adjustment unit installed on the outside of the water storage tank. The water volume adjustment unit includes valve assemblies for adding and discharging water, and sensors for detecting water temperature, water level, and pH. The beneficial effects of this invention are: the device is equipped with a controller, which can precisely control the entry and exit of water through the valve assemblies based on information fed back from the sensors. Based on a preset growth stage-water level correspondence and real-time sensor feedback, a closed-loop control is formed, ensuring that the actual water level in the water storage tank is always maintained at the target water level value corresponding to the current growth stage of the tobacco seedlings, providing a stable and suitable water environment for the growth of the tobacco seedlings.

Description

Technical Field

[0001] This invention relates to the field of tobacco seedling cultivation technology, specifically to an automatic water volume adjustment device for tobacco seedling cultivation ponds. Background Technology

[0002] Tobacco seedling cultivation is a crucial step in tobacco production, and precise control of the water level in the seedling bed directly affects the growth and development of the seedlings. In traditional tobacco seedling management, water level control relies heavily on manual observation and adjustment of inlet valves or water pumps. This method suffers from high labor intensity, low control precision, and frequent water level fluctuations. Tobacco seedlings have different water requirements at different growth stages (such as emergence, small cross-shaped stage, large cross-shaped stage, and mature seedling stage), necessitating different water level settings. Manual adjustment makes it difficult to achieve a constant and precise water level.

[0003] In addition, during the hardening-off stage before transplanting tobacco seedlings, the bottom of the seedling trays needs to be lifted off the water surface for "dry hardening" to enhance the seedlings' resistance to adverse conditions. Currently, the common practice is to drain all the water from the pond. However, this leaves the pond dry, and refilling it after hardening is a cumbersome process that may also impact the seedlings due to factors such as the speed of water filling and water temperature.

[0004] Therefore, there is an urgent need for a device that can automatically detect and constantly control the water level at different stages, and can conveniently remove the seedling trays from the water surface during hardening without draining the pond water. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic water volume adjustment device for tobacco seedling nursery ponds to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic water volume regulating device for tobacco seedling nursery, comprising: A base plate, with a seedling shed installed on top of the base plate; A water storage tank is placed on top of the base plate. A water volume adjustment unit is installed on the outside of the water storage tank. The water volume adjustment unit includes a valve assembly for adding and draining water, as well as a sensor for detecting water temperature, water level, and pH. The seedling trays placed inside the water storage tank are raised and lowered, and the water storage tank is equipped with a drive unit that drives the bottom of the seedling trays to lift off the water surface.

[0007] Preferably, one end of the base plate is fixedly connected to a bracket, the top of the bracket is fixedly connected to an operation panel, and the top of the operation panel is fixedly connected to an alarm.

[0008] Preferably, the valve assembly includes an inlet pipe and an outlet pipe fixed to the side of the water storage tank. The inlet pipe is fixed to one side of the water storage tank and one end extends into the interior of the water storage tank. An inlet valve is installed in the middle of the inlet pipe.

[0009] Preferably, a discharge pipe is fixedly connected to the side of the water storage tank away from the inlet pipe, and a drain valve is fixedly connected to the middle of the discharge pipe.

[0010] Preferably, the sensors include a water level sensor, a temperature sensor, and a pH meter fixed to one end of the water storage tank.

[0011] Preferably, the drive unit includes a fixed frame that is vertically fixed inside the water storage tank, a linear guide rail that is fixed to the outside of the fixed frame, a lifting frame that is vertically slidably connected to the outside of the linear guide rail, an L-shaped bracket that is fixed to the outside of the lifting frame, and the seedling tray that is placed on top of the bracket.

[0012] Preferably, a pulley is fixedly connected to the top of the fixed frame, a steel wire rope is installed in the middle of the pulley, one end of the steel wire rope is connected to the lifting frame, and a drive unit is fixedly connected to the side of the fixed frame away from the linear guide rail, and the output end of the drive unit is fixedly connected to the end of the steel wire rope.

[0013] Preferably, the drive unit is an electric push rod, a lead screw slide, or a cylinder.

[0014] Compared with existing technologies, the advantages of this invention are as follows: The device is equipped with a controller that can precisely control the inflow and outflow of water through a valve assembly based on information from sensor feedback. A closed-loop control is formed based on a preset growth stage-water level correspondence and real-time sensor feedback, ensuring that the actual water level in the reservoir is always maintained at the target water level corresponding to the current growth stage of the tobacco seedlings, providing a stable and suitable water environment for seedling growth. The valve assembly includes an inlet pipe and an outlet pipe, each equipped with an inlet valve and an outlet valve, respectively. The inlet pipe is connected to an external water pump, and the outlet pipe is connected to an external water pump. This design achieves bidirectional, rapid, and independent water level regulation, which is more flexible, precise, and responsive than controlling only the inflow or only the outflow, better meeting the water level change requirements of tobacco seedling growth. During specific hardening-off stages, the device can automatically trigger a lifting command on the seedling tray, converting preset agronomical requirements into automated mechanical actions, meeting the special needs of hardening-off and helping to improve the stress resistance and quality of the tobacco seedlings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the drain valve of the present invention; Figure 3 This is a schematic diagram of the structure of the fixing frame of the present invention; Figure 4 This is an enlarged view of point A in the present invention; Figure 5 This is a schematic diagram of the structure of the water storage tank of the present invention.

[0016] In the diagram: 1. Base plate; 2. Water storage tank; 3. Control panel; 4. Alarm; 5. Water inlet pipe; 6. Water inlet valve; 7. Water level sensor; 8. Fixing frame; 9. Linear guide rail; 10. Lifting frame; 11. Pulley; 12. Drive unit; 13. Steel wire rope; 14. Bracket; 15. Seedling tray; 16. Drain pipe; 17. Drain valve; 18. Seedling shed. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below 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.

[0018] Please see Figures 1-5 The present invention provides a technical solution: an automatic water volume adjustment device for tobacco seedling nursery, comprising: a base plate 1, on the top of the base plate 1 is a seedling shed 18; a water storage tank 2 installed on the top of the base plate 1, a water volume adjustment part installed on the outside of the water storage tank 2, the water volume adjustment part including a valve assembly for adding and draining water and a sensor for detecting water temperature, water level and pH; and a seedling tray 15 placed inside the water storage tank 2, the inside of the water storage tank 2 being equipped with a drive part for driving the bottom of the seedling tray 15 out of the water surface.

[0019] It should be noted that a controller is provided in this embodiment. Based on sensor feedback, the controller controls the inflow and outflow of water through valve components, thereby adjusting the water level inside the reservoir 2 to maintain the actual water level at the target water level corresponding to the current growth stage. The drive unit drives the seedling tray 15 to lift so that the bottom of the seedling tray is removed from the water surface. It can command the drive unit to act according to the preset growth stage-water level correspondence and the real-time feedback from the sensor detection unit, forming a closed-loop control to maintain the target water level. At the same time, it can automatically trigger the lifting command of the seedling tray 15 during a specific hardening stage, transforming the preset agronomic requirements into automated mechanical actions. Through automation and intelligent design, precise and adaptive control of the water level during tobacco seedling cultivation is achieved, which not only optimizes the tobacco seedling growth environment and improves seedling cultivation efficiency and quality, but also reduces the intensity of manual labor, and has good practicality and economy.

[0020] In one embodiment, a bracket is fixedly connected to one end of the base plate 1, an operation panel 3 is fixedly connected to the top of the bracket, and an alarm 4 is fixedly connected to the top of the operation panel 3.

[0021] It should be noted that in this embodiment, the operation panel 3 includes a controller and a human-machine interface. The human-machine interface is used to set and switch multiple target water level values, as well as to manually control the raising and lowering of the lifting support; the human-machine interface is a touch screen or a button panel. The controller adopts existing parameter technologies such as PLC and microcontroller; the PLC and microcontroller used have preset programs for the required operating purpose; they can receive and process signals, and issue corresponding control commands based on the processing results. The alarm 4 is electrically connected to the operation panel 3 via wires and is used to issue an alarm when the water level is abnormal or the device malfunctions; the alarm 4 is an audible and visual alarm. This adds safety monitoring and fault early warning functions to the system; it enables timely notification of management personnel through audible and visual alarms when abnormal situations such as water level sensor failure, solenoid valve jamming, or water level deviating significantly from the set range (such as water shortage or overflow) occur, avoiding damage to the entire batch of tobacco seedlings due to equipment failure or unexpected situations, and improving the reliability and safety of the system.

[0022] In one embodiment, the valve assembly includes an inlet pipe 5 and a outlet pipe 16 fixedly connected to the side of the water storage tank 2. The inlet pipe 5 is fixedly connected to one side of the water storage tank 2 and one end extends into the interior of the water storage tank 2. An inlet valve 6 is installed in the middle of the inlet pipe 5. An outlet pipe 16 is fixedly connected to the side of the water storage tank 2 away from the inlet pipe 5. A drain valve 17 is fixedly connected to the middle of the outlet pipe 16.

[0023] It should be noted that in this embodiment, the inlet valve 6 is an inlet solenoid valve and the drain valve 17 is a drain solenoid valve. The inlet solenoid valve is installed in the middle of the inlet pipe 5, and the drain solenoid valve is installed in the middle of the outlet pipe 16. The inlet pipe is connected to an external water pump; the drain pipe is connected to an external water pump. Water level can be controlled by actively controlling the pumping and discharging of water. This achieves bidirectional, rapid, and independent water level regulation, which is more flexible, precise, and responsive than methods that only control the inlet (relying on overflow drainage) or only control the outlet.

[0024] In one embodiment, the sensors include a water level sensor 7, a temperature sensor, and a pH meter, all fixed to one end of the water storage tank 2.

[0025] It should be noted that in this embodiment, the water level sensor 7 is an ultrasonic level sensor, a float level sensor, or a pressure level sensor. The water level sensor 7 is used to detect the water level and, in conjunction with the controller, monitors the water level in real time. With the cooperation of the inlet valve 6 and the outlet valve 17, the water level is adjusted. The temperature sensor is used to provide real-time feedback on temperature changes, and the pH meter is used to detect the acidity or alkalinity of the water, perform detection and alarm functions, and prevent the acidity or alkalinity from affecting the growth of tobacco seedlings.

[0026] In one embodiment, the drive unit includes a fixed frame 8 vertically fixed inside the water storage tank 2. A linear guide rail 9 is fixedly connected to the outside of the fixed frame 8. A lifting frame 10 is vertically slidably connected to the outside of the linear guide rail 9. An L-shaped bracket 14 is fixedly connected to the outside of the lifting frame 10. A seedling tray 15 is placed on top of the bracket 14. A pulley 11 is fixedly connected to the top of the fixed frame 8. A steel wire rope 13 is installed in the middle of the pulley 11. One end of the steel wire rope 13 is connected to the lifting frame 10. A drive unit 12 is fixedly connected to the side of the fixed frame 8 away from the linear guide rail 9. The output end of the drive unit 12 is fixedly connected to the end of the steel wire rope 13. The drive unit is an electric push rod, a lead screw slide, or a cylinder. It should be noted that, in this embodiment, when the height of the seedling tray 15 needs to be adjusted, the output end of the electric push rod, the moving slide of the lead screw slide, or the output end of the cylinder drives one end of the wire rope 13 to move up and down, and the other end of the wire rope 13 moves up or down along the linear guide rail 9. In this way, the lifting frame 10 is driven to move up and down outside the linear guide rail 9 through the wire rope 13, and the bracket 14 is driven to move up and down through the lifting frame 10, and the seedling tray 15 is driven to move up and down through the bracket 14.

[0027] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0028] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0029] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] 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. An automatic water volume regulating device for tobacco seedling nursery, characterized in that: include: A base plate (1) is provided, and a seedling shed (18) is installed on the top of the base plate (1). A water storage tank (2) is placed on top of the base plate (1). A water volume adjustment part is installed on the outside of the water storage tank (2). The water volume adjustment part includes a valve assembly for adding and draining water and a sensor for detecting water temperature, water level and pH. The seedling tray (15) placed inside the water storage tank (2) is raised and lowered. The water storage tank (2) is equipped with a drive unit that drives the bottom of the seedling tray (15) to detach from the water surface.

2. The automatic water volume adjustment device for a tobacco seedling nursery pond according to claim 1, characterized in that: One end of the base plate (1) is fixedly connected to a bracket, and the top of the bracket is fixedly connected to an operation panel (3). An alarm (4) is fixedly connected to the top of the operation panel (3).

3. The automatic water volume adjustment device for a tobacco seedling nursery pond according to claim 1, characterized in that: The valve assembly includes an inlet pipe (5) and an outlet pipe (16) fixed to the side of the water storage tank (2). The inlet pipe (5) is fixed to one side of the water storage tank (2) and one end extends into the interior of the water storage tank (2). An inlet valve (6) is installed in the middle of the inlet pipe (5).

4. The automatic water volume adjustment device for a tobacco seedling nursery pond according to claim 3, characterized in that: The water storage tank (2) is fixedly connected to a discharge pipe (16) on the side away from the water inlet pipe (5), and a drain valve (17) is fixedly connected to the middle of the discharge pipe (16).

5. The automatic water volume adjustment device for a tobacco seedling nursery pond according to claim 4, characterized in that: The sensors include a water level sensor (7) fixed to one end of the water storage tank (2), a temperature sensor, and a pH meter.

6. The automatic water volume adjustment device for a tobacco seedling nursery pond according to claim 1, characterized in that: The drive unit includes a fixed frame (8) that is vertically fixed inside the water storage tank (2). A linear guide rail (9) is fixed to the outside of the fixed frame (8). A lifting frame (10) is vertically slidably connected to the outside of the linear guide rail (9). An L-shaped bracket (14) is fixed to the outside of the lifting frame (10). The seedling tray (15) is placed on top of the bracket (14).

7. The automatic water volume adjustment device for a tobacco seedling nursery pond according to claim 6, characterized in that: A pulley (11) is fixedly connected to the top of the fixed frame (8), and a steel wire rope (13) is installed in the middle of the pulley (11). One end of the steel wire rope (13) is connected to the lifting frame (10). A drive unit (12) is fixedly connected to the side of the fixed frame (8) away from the linear guide rail (9). The output end of the drive unit (12) is fixedly connected to the end of the steel wire rope (13).

8. The automatic water volume adjustment device for a tobacco seedling nursery pond according to claim 7, characterized in that: The drive unit is an electric push rod, a lead screw slide, or a cylinder.

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