Novel intelligent water and fertilizer adjusting integrated device

Abstract

The utility model discloses a novel intelligent water and fertilizer adjusting integrated device which comprises a main water pump, a water outlet of the main water pump is fixedly communicated with a first pipeline, one end of the first pipeline is fixedly communicated with a first three-way valve, and one end of the first three-way valve is fixedly communicated with a mixing pipeline through a pipeline. According to the novel intelligent adjustment water and fertilizer integrated device, the whole set of hardware equipment of the intelligent adjustment water and fertilizer integrated device can be composed of a water supplementing and stirring area, a fertilizer preparing and liquid mixing area and a fertilizer applying area according to the actual requirements of fertilizer preparing and fertilizer applying irrigation, and the whole set of hardware equipment is composed of the water supplementing and stirring area, the fertilizer preparing and liquid mixing area and the fertilizer applying area; the main water pump serves as main power of water replenishing and irrigation, the fertilizer suction pump serves as main power of fertilizer suction to participate in the whole process of fertilizer preparation and fertilization, fertilizer preparation and liquid mixing in the proportion of mother liquor A and mother liquor B can be automatically completed, irrigation of an irrigation area is completed, and the system has the advantages of being accurate in EC and PH regulation and control, high in regulation and control response sensitivity, automatic in control and management, safe and trouble-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural automatic control, in particular to a novel intelligent water-fertilizer integrated regulating device. Background Art

[0002] With the rapid and diversified development of automatic control technology, modern automatic control technology plays a vital role in contemporary agricultural production. By combining automatic control technology with the concept of water-fertilizer integration advocated in the field of agricultural fertilization, agricultural practitioners can view important indicators such as soil temperature, soil moisture, and soil EC value through the host computer or touch screen on the local end, obtain the soil moisture conditions in the current fertilization area in a timely manner, make reasonable decisions in the water-fertilizer control unit, and more accurately complete the proportion of fertilizer and fertilization irrigation, so as to achieve precise regulation of plant growth.

[0003] At present, water-fertilizer integrated equipment plays a vital role in agricultural production. It effectively improves the yield and quality of crops by accurately controlling the supply of water and nutrients. However, in the actual operation of the equipment, especially in the detection and regulation of the mixing end, there are some problems that need to be solved.

[0004] Among them, the control accuracy and response sensitivity of the two most critical parameters EC (electrical conductivity) and PH (acidity) have become bottlenecks restricting the improvement of equipment performance. The EC value reflects the concentration of soluble salts in the solution, which is crucial for plant growth. Too high or too low EC values ​​may affect the normal growth of plants; while the PH value determines the acidity and alkalinity of the solution, which has a direct impact on the absorption capacity of plant roots.

[0005] In current equipment operation, EC and pH regulation is often inaccurate. This may be due to insufficient sensor accuracy, inaccurate calibration or environmental factors. This inaccurate regulation will cause the composition of the water and fertilizer solution to not meet the needs of crop growth, thereby affecting crop growth and yield.

[0006] In addition, the low sensitivity of the control response is also a problem that needs to be solved. In actual applications, due to various reasons such as the device's own performance, control algorithm, and environmental factors, the device often cannot respond quickly after receiving the control command, resulting in poor control effect. This low response sensitivity problem will further aggravate the problem of inaccurate EC and PH control, causing greater impact on crop growth. Utility Model Content

[0007] The purpose of the utility model is to provide a novel intelligent integrated water-fertilizer regulating device to solve the problems of inaccurate regulation of EC and PH in the existing intelligent integrated water-fertilizer regulating device mentioned in the background technology and low regulation response sensitivity.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a novel intelligent water-fertilizer integrated regulating device, comprising a main water pump, a water outlet of the main water pump is fixedly connected to a first pipeline, one end of the first pipeline is fixedly connected to a first three-way valve, one end of the first three-way valve is fixedly connected to a mixing pipeline through a pipeline, the other end of the first three-way valve is fixedly connected to a second three-way valve, one end of the second three-way valve is fixedly connected to a water replenishment stirring mechanism, a fertilizer suction pump is fixedly installed on the other end of the second three-way valve through a pipeline, the liquid outlet of the fertilizer suction pump is fixedly connected to a fertilizer conduit, a second pressure gauge is fixedly installed on the fertilizer conduit, a fertilizer mixing mechanism is fixedly installed between the fertilizer conduit and the water replenishment stirring mechanism, the liquid outlet of the fertilizer mixing mechanism is fixedly connected to the mixing pipeline, the liquid outlet of the mixing pipeline is fixedly connected to a fertilizer supply pipe, and a fertilizing mechanism is fixedly installed on one end of the fertilizer supply pipe.

[0009] Preferably, the water replenishment stirring mechanism includes a water pipe whose bottom is fixedly connected to the mother liquid barrel A, the mother liquid barrel B and the acid and alkali barrel, and the tops of the mother liquid barrel A, the mother liquid barrel B and the acid and alkali barrel are all fixedly installed with stirring motors, and the connection between the water pipe and the mother liquid barrel A, the mother liquid barrel B and the acid and alkali barrel is fixedly installed with a valve B, and the water outlets of the mother liquid barrel A, the mother liquid barrel B and the acid and alkali barrel are all fixedly connected with a guide pipe.

[0010] Preferably, the fertilizer mixing mechanism includes three Venturi fertilization pipes and a conduit fixedly connected to one side of the Venturi fertilization pipe, on which a first flow meter, a valve A and a solenoid valve A are fixedly installed, and the three conduits are fixedly connected to the mother liquid barrel A, the mother liquid barrel B and the acid and alkali barrel respectively, and the top ends of the three Venturi fertilization pipes are fixedly connected to the mixing pipe through pipes.

[0011] Preferably, the fertilization mechanism includes a plurality of spreading pipes and a solenoid valve B and a second flow meter fixedly mounted on the plurality of spreading pipes.

[0012] Preferably, a first frequency converter is fixedly mounted on the main water pump, and a second frequency converter is fixedly mounted on the fertilizer suction pump.

[0013] Preferably, a first pressure gauge is fixedly installed on the first pipeline.

[0014] Preferably, the plurality of spreading pipes extend to a plurality of fertilization areas respectively, and a soil moisture sensor is installed in each of the plurality of fertilization areas.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] This intelligent integrated water-fertilizer adjustment device can adjust the fertilizer according to the actual needs of fertilizer distribution and irrigation. The whole set of hardware equipment consists of a water replenishment and stirring area, a fertilizer mixing area and a fertilization area. The main water pump serves as the main power for water replenishment and irrigation, and the fertilizer suction pump serves as the main power for fertilizer suction and participates in the whole process of fertilizer distribution and fertilization. It can automatically complete the A and B mother liquor ratio fertilizer distribution and fertilizer mixing, and complete irrigation in the irrigation area. It has the characteristics of precise EC and PH regulation, high regulation response sensitivity, and automated control management, which is safe and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A diagram of the hardware device framework of the utility model;

[0018] Figure 2 This is the PLC wiring diagram of the utility model;

[0019] Figure 3 The switching principle and PID adjustment diagram of the utility model;

[0020] Figure 4 It is the configuration PID flow chart of the utility model;

[0021] Figure 5 This is the overall hardware schematic diagram of the utility model.

[0022] In the figure: 1. Main water pump; 2. First frequency converter; 3. First pressure gauge; 4. First three-way valve; 5. Second three-way valve; 6. Fertilizer suction pump; 7. Second frequency converter; 8. Second pressure gauge; 9. Mother liquid barrel A; 10. Mother liquid barrel B; 11. Stirring motor; 12. Valve A; 13. Solenoid valve A; 14. Mixing pipe; 15. Venturi fertilizer pipe; 16. First flow meter; 17. Fertilizer supply pipe; 18. Sowing pipe; 19. Solenoid valve B; 20. Second flow meter; 21. Valve B; 22. Acid and alkali barrel; 23. Water pipe. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] See also Figure 1-5The utility model provides a novel intelligent integrated water-fertilizer regulating device, comprising a main water pump 1, a water outlet of the main water pump 1 is fixedly connected to a first pipeline, one end of the first pipeline is fixedly connected to a first three-way valve 4, one end of the first three-way valve 4 is fixedly connected to a mixing pipeline 14 through a pipeline, the other end of the first three-way valve 4 is fixedly connected to a second three-way valve 5, one end of the second three-way valve 5 is fixedly connected to a water replenishment stirring mechanism, the other end of the second three-way valve 5 is fixedly installed with a fertilizer suction pump 6 through a pipeline, the liquid outlet of the fertilizer suction pump 6 is fixedly connected to a fertilizer conduit, and the fertilizer conduit is fixedly connected to a mixing conduit 14. A second pressure gauge 8 is fixedly installed, a fertilizer mixing mechanism is fixedly installed between the fertilizer conduit and the water replenishment stirring mechanism, the liquid outlet of the fertilizer mixing mechanism is fixedly connected to the mixing pipe 14, the liquid outlet of the mixing pipe 14 is fixedly connected to a fertilizer supply pipe 17, a fertilizing mechanism is fixedly installed at one end of the fertilizer supply pipe 17, a first frequency converter is fixedly installed on the main water pump 1, a second frequency converter 7 is fixedly installed on the fertilizer suction pump 6, a first pressure gauge 3 is fixedly installed on the first pipeline, and multiple sowing pipes 18 extend to multiple fertilization areas respectively, and soil moisture sensors are installed in multiple fertilization areas;

[0025] When using, the hardware system controller is Siemens S7-200 SMART PLC. The CPU of this series of PLCs is divided into two types according to the digital output type: transistor output and relay output. It is divided into economical model and standard model according to whether it has access to expansion modules. There are three groups of pulse solenoid valves in the fertilizer mixing area. When the hardware system performs proportional fertilizer mixing, it needs to be repeatedly switched on and off at a high frequency. Compared with the mechanical contacts of relay output, they are easily worn. Frequent opening and closing may shorten the service life. Transistor output has the characteristics of fast response speed and long service life. Therefore, transistor output is selected. The CPU type is ST40. The CPU power supply is DC 24V power supply, DC digital input, transistor digital output, the number of digital input points is 24DI, and the number of digital output points is 16DO. Since the control points of the whole hardware system are more than the 16 digital output points provided by the CPU, a digital expansion module needs to be connected. Since the analog quantity of the sensor is used as the parameter of PID control, that is, the PLC needs to obtain the analog feedback value of the sensor and needs to input the analog set value to the inverter, an analog expansion module needs to be connected;

[0026] The digital expansion module uses EM DT08, which is an 8-channel digital transistor output. The analog expansion module uses EMAM06, which is a 4-channel analog input and a 2-channel analog output. PLC DI input and application interface table, starting from the PLC digital input, DI input I0.0~I0.2 application interface is inverter fault, operation, ready to run, alarm, DI input I0.3~I0.7 interface is inverter fault, operation, ready to run, alarm.

[0027] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 Further, the water replenishment stirring mechanism includes a water pipe 23 whose bottom is fixedly connected to the mother liquid barrel A9, the mother liquid barrel B10 and the acid-base barrel 22, and the tops of the mother liquid barrel A9, the mother liquid barrel B10 and the acid-base barrel 22 are all fixedly installed with a stirring motor 11, and the connection between the water pipe 23 and the mother liquid barrel A9, the mother liquid barrel B10 and the acid-base barrel 22 is fixedly installed with a valve B21, and the water outlets of the mother liquid barrel A9, the mother liquid barrel B10 and the acid-base barrel 22 are all fixedly connected with a guide pipe;

[0028] In order to solve the problem of inaccurate EC and PH value control caused by equipment problems, a switch was made with whether to enable PH adjustment as the starting condition, and the operation was performed in the form of a knob on the device; in the program design, the S7-200 SMART program includes PID interrupt initialization subroutine, EC PID control subroutine, PH PID control subroutine, touch screen communication subroutine, flow calculation subroutine, manual mode, automatic irrigation mode, timed irrigation mode subroutine, irrigation record subroutine and output subroutine. The main program is used to control the start and stop of the main equipment and the activation of the subroutine. The PID interrupt initialization subroutine defines the time interruption parameters. The three irrigation mode subroutines determine whether the start conditions are met and control the irrigation status. The EC PID and PH PID control subroutines are used to adjust the output valve ratio and the switch pulse duration. The touch screen communication subroutine is used for data communication with the HMI. The flow calculation subroutine is used for flow calculation. The recording subroutine is used to record irrigation data and conditions. The output subroutine is used to control digital output.

[0029] The fertilizer mixing mechanism includes three Venturi fertilization pipes 15 and a conduit fixedly connected to one side of the Venturi fertilization pipe 15, on which a first flow meter 16, a valve A12 and a solenoid valve A13 are fixedly installed. The three conduits are fixedly connected to the mother liquid barrel A9, the mother liquid barrel B10 and the acid-base barrel 22 respectively, and the top ends of the three Venturi fertilization pipes 15 are fixedly connected to the mixing pipe 14 through pipes;

[0030] The EC PID control subroutine is mainly divided into parameter setting in PID0_CTRL, range conversion of analog quantity and pulse ratio calculation. Finally, the converted pulse duration is allocated to the A and B fertilizer inlet switches. The A and B fertilizer ratios and EC parameter adjustment are carried out by adjusting the pulse solenoid valve.

[0031] Before selecting the inverter PID control, determine whether to select PH regulation. If PH regulation is selected, PLC PH PID loop regulation, PLC EC PID loop regulation, inverter main pump pressure PID regulation, inverter fertilizer pump pressure PID regulation are executed at the same level. If PH regulation is not selected, PLC PH PID loop regulation, inverter main pump pressure PID regulation, inverter fertilizer pump EC PID regulation are executed at the same level.

[0032] G120XA inverter preset, select preset macro 42 in the preset macro, which is the analog input of the PID controller. DI0 is connected to the PLC to control the start and stop of the inverter. AI0 is the analog input value given by the PLC. For the inverter, input the main water pump pressure setting value, and for the inverter, input the EC value or pressure value. DO 0~DO 3 are connected to the input end of the PLC in sequence as the PLC reads the inverter's fault, operation, ready to run, and alarm status.

[0033] The fertilization mechanism includes a plurality of spreading pipes 18 and a solenoid valve B19 and a second flow meter 20 fixedly mounted on the plurality of spreading pipes 18 .

[0034] When the embodiment of the present application is in use: after the user completes the parameter setting on the touch screen, the local device starts to run, first the main water pump 1 replenishes water according to the pressure value set by the PLC for the main water pump 1, after the mother liquid barrel reaches the full scale, the main water pump 1 stops working, the stirring motor 11 starts stirring, and waits for the high-concentration mother liquid to be stirred and then shuts down, the water replenishment stirring zone inlet valve B21 is closed, and the preparation work for fertilizer distribution is completed at this time; here it is necessary to explain the separate placement of the A, B, and C mother liquid barrels in the water replenishment stirring zone: the A and B mother liquid barrels are the source of proportion control, and store the high-concentration water-soluble fertilizers required for the growth of the corresponding plants. If several high-concentration water-soluble fertilizers are mixed for a long time, a chemical reaction will occur, resulting in an imbalance of the original two mother liquid elements, and the mother liquid barrel C is set separately as an acid adjustment barrel, which does not participate in the proportion adjustment of the A and B mother liquids. Because some plants are more sensitive to the acidity of the fertilizer liquid, the C mother liquid barrel is set separately to adjust the acidity of the fertilizer liquid;

[0035] Secondly, the main water pump 1 works again according to the analog value set by the first frequency converter to divide the water flow into two paths through the three-way pipe next to the pressure gauge, one is the main water path, and the other is the bypass. In the bypass, the fertilizer suction pump 6 works according to the analog value set by the second frequency converter 7. When the fertilizer suction pump 6 sends the water flow into the three corresponding venturi fertilization pipes 15, a negative pressure is formed in the venturi fertilization pipes 15, and the three mother liquids are sucked into the venturi pipes and mixed with water and sent to the mixed liquid pipe 14. On the main road, the main road water flow and the bypass fertilizer liquid meet in the mixed liquid pipe to form a mixed liquid, which is sent out from the liquid outlet. EC and PH sensors are installed in the mixed liquid pipe 14 to detect the conductivity, and the pH value is used as a reference for the loop PID control;

[0036] Finally, the mixed fertilizer liquid is branched at the liquid outlet and sent to the required fertilization area. The electromagnetic valve B19 of the corresponding fertilization area is opened. Each water channel is equipped with a second flow meter 20 to detect the branch flow. The soil moisture sensor detects the soil temperature, humidity and EC value of the partition for the fertilizer applicator to check.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel intelligent integrated water and fertilizer regulating device, comprising a main water pump (1), characterized in that: The water outlet of the main water pump (1) is fixedly connected to a first pipeline, one end of the first pipeline is fixedly connected to a first three-way valve (4), one end of the first three-way valve (4) is fixedly connected to a mixing pipeline (14) through a pipeline, the other end of the first three-way valve (4) is fixedly connected to a second three-way valve (5), one end of the second three-way valve (5) is fixedly connected to a water replenishment stirring mechanism, the other end of the second three-way valve (5) is fixedly installed with a fertilizer suction pump (6) through a pipeline, the liquid outlet of the fertilizer suction pump (6) is fixedly connected to a fertilizer conduit, a second pressure gauge (8) is fixedly installed on the fertilizer conduit, a fertilizer mixing mechanism is fixedly installed between the fertilizer conduit and the water replenishment stirring mechanism, the liquid outlet of the fertilizer mixing mechanism is fixedly connected to the mixing pipeline (14), the liquid outlet of the mixing pipeline (14) is fixedly connected to a fertilizer supply pipe (17), and one end of the fertilizer supply pipe (17) is fixedly installed with a fertilizing mechanism.

2. According to claim 1, a novel intelligent water-fertilizer integrated regulating device is characterized in that: The water replenishment stirring mechanism comprises a water pipe (23) whose bottom is fixedly connected to a mother liquid barrel A (9), a mother liquid barrel B (10) and an acid-base barrel (22); a stirring motor (11) is fixedly installed on the top of each of the mother liquid barrel A (9), the mother liquid barrel B (10) and the acid-base barrel (22); a valve B (21) is fixedly installed at the connection between the water pipe (23) and the mother liquid barrel A (9), the mother liquid barrel B (10) and the acid-base barrel (22); and a guide pipe is fixedly connected to the water outlets of the mother liquid barrel A (9), the mother liquid barrel B (10) and the acid-base barrel (22).

3. A novel intelligent water-fertilizer integrated regulating device according to claim 2, characterized in that: The fertilizer mixing mechanism comprises three Venturi fertilization pipes (15) and a conduit fixedly connected to one side of the Venturi fertilization pipe (15), on which a first flow meter (16), a valve A (12) and a solenoid valve A (13) are fixedly mounted, and the three conduits are respectively fixedly connected to a mother liquid barrel A (9), a mother liquid barrel B (10) and an acid-base barrel (22), and the top ends of the three Venturi fertilization pipes (15) are fixedly connected to a mixing pipe (14) through pipes.

4. According to claim 1, a novel intelligent water-fertilizer integrated regulating device is characterized in that: The fertilizing mechanism comprises a plurality of spreading pipes (18), and a solenoid valve B (19) and a second flow meter (20) fixedly mounted on the plurality of spreading pipes (18).

5. According to claim 1, the novel intelligent water-fertilizer integrated regulating device is characterized by: A first frequency converter (2) is fixedly mounted on the main water pump (1), and a second frequency converter (7) is fixedly mounted on the fertilizer suction pump (6).

6. The novel intelligent water-fertilizer integrated regulating device according to claim 1 is characterized in that: A first pressure gauge (3) is fixedly mounted on the first pipeline.

7. The novel intelligent water-fertilizer integrated regulating device according to claim 4 is characterized in that: The plurality of spreading pipes (18) respectively extend into a plurality of fertilization areas, and soil moisture sensors are installed in the plurality of fertilization areas.

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