Agricultural and forestry agent application, irrigation systems and process piping systems used

Abstract

The present application aims at the shortage of the prior art that the number of pumps used in the liquid inlet and outlet pipeline system of the agricultural and forestry agent applying and irrigation system is large, which results in high cost of the system, and provides a process pipeline system, which aims at the shortage of the prior art that the Venturi pump and the fertilizer pump are combined to dynamically adjust the proportion of the fertilizer according to the EC and PH value, which results in inaccurate proportion of the fertilizer and complex operation of the control system, and provides a fertilizer / agent irrigation system. The process pipeline system used in the agricultural and forestry agent applying and irrigation includes an inlet and outlet loop unit, the inlet and outlet loop unit includes an inlet device and an outlet device, the inlet device includes an inlet pipeline first section and an inlet pipeline second section, and one end of the pipeline of the inlet pipeline first section is used for being communicated with a liquid supply device. The agricultural and forestry agent applying and irrigation system and the process pipeline system used in the system can reduce the number of liquid pumps, and reduce the cost of the whole system.

Description

Technical Field

[0001] This invention belongs to the field of agricultural and forestry production technology, and specifically relates to fertilization, pesticide application and irrigation in agriculture and forestry. Background Technology

[0002] In agricultural production, efficient and precise fertilization and pesticide application is a key technology, directly affecting crop growth, quality, yield, and production benefits. Current fertilization and irrigation systems often use proportional pumps or Venturi pumps to control fertilizer concentration. For example, Chinese invention patent application number 201711013019.X, entitled "A Precision Fertilizer Mixing and Clear Water Irrigation Dual-Purpose Fertilizer Apparatus and Its EC+PH Adjustment Method," discloses a precision fertilizer mixing and clear water irrigation dual-purpose fertilizer apparatus, including a mixing container 6, a water inlet valve for adding clear water to the mixing container 6, a float level control switch for automatically controlling the opening and closing of the water inlet valve based on the lowest and highest water levels in the mixing container 6, a Venturi pump for adding raw fertilizer or acid solution to the mixing container 6, a fertilizer suction solenoid valve, a fertilizer pump, and a return pipeline including two output pipelines. The system includes a fertilizer concentration acquisition device, a pH acquisition device, and a fertilizer mixing control system. The mixing container 6 is connected via pipelines to the output end of the inlet valve, the output end of the Venturi pump, and the input end of the fertilizer pump. The input end of the Venturi pump is connected via a pipeline to the fertilizer suction solenoid valve. The output end of the fertilizer pump is connected to the input end of the return pipeline. The first output pipeline of the return pipeline is connected to the pipeline between the Venturi pump and the fertilizer suction solenoid valve, and the second output pipeline is connected to the mixing container 6. The fertilizer concentration acquisition device and the pH acquisition device are located on the second output pipeline. The fertilizer concentration acquisition device and the pH acquisition device are respectively connected to the data lines of the fertilizer mixing control system. The fertilizer mixing control system is electrically connected to the fertilizer suction solenoid valve and the fertilizer pump. The fertilizer mixing control system sets the final required fertilizer EC concentration value, pH value, and fertilizer application rate. The system uses a Venturi pump in conjunction with the fertilizer suction solenoid valve to absorb fertilizer. The Venturi pump utilizes a reciprocating mechanical structure to change the pump chamber volume, thereby achieving the intake and discharge of media. The fertilizer suction power is generated by the Venturi pump. The solenoid valve, as a controllable component, has its unit fertilizer suction amount controlled by the switching time of the electronic control system. The return pipeline is powered by a fertilizer pump, ensuring sufficient power for the fertilizer to enter the mixing container 61, allowing for rapid and thorough mixing with clean water. Given the parameters of the fertilizer pump, pipeline, and Venturi pump, and their interrelationships, the EC and pH values ​​collected by the EC and pH sensors on the pipeline are used as closed-loop control feedback values. PID adjustment is performed based on the difference between these values ​​and the set EC and pH values. The calculated output PWM signal pulse width (= required fertilizer suction amount per unit time / Venturi pump fertilizer suction rate) is used to control the switching time of each pulse-suction solenoid valve 5, controlling the fertilizer suction amount per unit time and thus controlling the fertilizer concentration, achieving precise control of fertilizer concentration and pH.The above-mentioned fertilization and irrigation system has the following shortcomings: First, pumps are installed for water inlet, fertilizer inlet, and fertilizer solution outlet from the mixing agent container 6, resulting in a large number of pumps and high system cost. Second, the use of Venturi pumps and fertilizer pumps combined with EC and pH values ​​to dynamically adjust the fertilizer ratio requires controlling parameters such as valve opening and closing speed and Venturi pump speed, making the control system complex. Moreover, EC and pH values ​​are dynamic variables, and the values ​​measured under different environments and temperatures vary greatly, making it difficult to achieve precise control. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing agricultural and forestry pesticide application and irrigation system inlet and outlet pipeline systems, which use a large number of pumps, resulting in high system costs, and to provide a process pipeline system.

[0004] A further objective of this invention is to address the shortcomings of existing agricultural and forestry pesticide application and irrigation systems that use Venturi pumps and fertilizer pumps in conjunction with EC and pH values ​​to dynamically adjust the fertilizer ratio, resulting in inaccurate fertilizer ratios and complex control system calculations. This invention provides a fertilizer / pesticide irrigation system.

[0005] The technical solution of this invention to solve the technical problem is as follows: A process piping system for applying agricultural and forestry pesticides and irrigation includes an inlet / outlet circuit unit. The inlet / outlet circuit unit includes an inlet device and an outlet device. The inlet device includes a first inlet pipe and a second inlet pipe. One end of the first inlet pipe is connected to a liquid supply device, and the other end is sealed to the inlet of a liquid pump. One end of the second inlet pipe is connected to the inlet of a storage container. A flow meter is located on the first inlet pipe. The outlet device includes a first outlet pipe and a second outlet pipe. One end of the first outlet pipe is connected to the outlet of the storage device, and the other end is connected to the first inlet pipe. The connection point between the two is located at the inlet of the liquid pump. One end of the second outlet pipe is connected to the second inlet pipe, and its connection point is located at the outlet of the liquid pump. A drain outlet is provided at the bottom of the storage container. Under the control of the liquid on / off control valve, when both the first and second sections of the inlet pipeline are in the open state, both the first and second sections of the outlet pipeline are in the closed state. The flow meter is used to measure the flow rate of the liquid delivered to the storage container. The system also includes a control system. The control valve and the liquid pump are connected to the output terminal of the control system, and the flow meter is connected to the input terminal of the control system. The control system controls the on / off state of the liquid pump and the control valve. Under the control of the control system, the control valve that needs to be closed is completely closed before it is opened. The connection point between the first section of the outlet pipeline and the first section of the inlet pipeline is located between the control valve and the flow meter. The control valves are respectively installed on the first and second sections of the inlet pipeline, and on the first and second sections of the outlet pipeline; In the liquid outlet pipeline A section The device is equipped with an EC sensor and a PH sensor. When a control system is set up, both the EC sensor and the PH sensor are connected to the input signal of the control system. A pressure gauge and a pressure sensor are installed on the two sections of the liquid outlet pipeline; It includes at least two liquid inlet / outlet circuit units, one of which is a main liquid inlet / outlet circuit unit and the others are branch liquid inlet / outlet circuit units. The liquid storage container of the main liquid inlet / outlet circuit unit serves as a mixing container. The liquid outlet end of the second section of the liquid outlet pipeline of the branch liquid inlet / outlet circuit unit is connected to the liquid inlet of the liquid storage container of the main liquid inlet / outlet circuit unit. The control valve on the second section of the liquid inlet pipeline of the branch liquid inlet / outlet circuit unit is a solenoid valve. A filter is installed on the first section of the liquid inlet pipeline. At least one of the aforementioned inlet / outlet liquid circuit units is provided with at least one parallel branch consisting of two sections of inlet pipe, one section of outlet pipe, and a liquid storage container. The pipe of the second section of inlet pipe is connected to the second section of outlet pipe of the inlet / outlet liquid circuit unit, and the connection point is located at the outlet end of the liquid pump. The pipe of the first section of outlet pipe is connected to the first section of inlet pipe of the inlet / outlet liquid circuit unit, and the connection point is located at the inlet end of the liquid pump.

[0006] An agricultural and forestry pesticide application and irrigation system includes the aforementioned process piping system for agricultural and forestry pesticide application and irrigation; The process piping system used for the application of agricultural and forestry pesticides and irrigation described above has a liquid storage container in the inlet and outlet liquid circuit unit that is a pesticide container, and the pesticides introduced into the pesticide container are different. Under the control of the control system, the main inlet / outlet liquid circuit unit and the branch inlet / outlet liquid circuit unit can simultaneously or at different times input liquid into the mixing container for mixing; EC and pH sensors are used to obtain the EC and pH values ​​of the liquids in each inlet and outlet liquid loop unit. When the system detects a significant change in the EC / pH value, the control system issues an alarm. A temperature detection device is installed in the system to monitor the temperature of the liquid within the system. The temperature of the liquid within the system is correlated with the EC and pH values. When the temperature changes, the EC and pH values ​​of the reagent change accordingly. When the temperature is high, the EC and pH values ​​increase accordingly, and when the temperature is low, the EC and pH values ​​decrease accordingly. When the increase or decrease limits are exceeded, the control system identifies it as abnormal and issues an alert to check the liquid flow rate.

[0007] The advantages and beneficial effects of this invention are as follows: The agricultural and forestry pesticide application and irrigation system and the process piping system using the structure of this invention only require one liquid pump in a liquid inlet and outlet circuit unit to transport liquid from the liquid supply device to the liquid storage device, and then from the liquid storage device to the liquid application point. The amount of liquid transported can be controlled, thus eliminating the need for multiple liquid pumps and reducing the cost of the entire system. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of an embodiment of the process piping system of the present invention; Figure 2 This is a schematic diagram of another embodiment of the process piping system of the present invention; Figure 3 This is a schematic diagram of an embodiment of the agricultural and forestry pesticide application and irrigation system of the present invention.

[0009] 1-Liquid pump; 2-Fertilizer pump; 3-Filter 1; 4-Filter 2; 5-Storage container; 6-Reagent container 1; 7-Reagent container 2; 8-Mixing container; 9-Inlet / outlet circuit unit; 901-Inlet / outlet circuit unit 1; 902-Inlet / outlet circuit unit 2; 10-Main inlet / outlet circuit unit; 11-Parallel branch; Liquid inlet device, 101-Liquid inlet pipe section 1, 102-Flow meter, 103-Liquid inlet pipe section 2, 104-Liquid storage container inlet pipe, 200-Liquid outlet device, 201-Liquid outlet pipe section 1, 202-Liquid outlet pipe section 2, 203-EC / PH sensor 1, 204-Pressure gauge, 205-Pressure sensor, 305 - Inlet flow meter for reagents, 306 - EC / PH sensor II, 307 - Pressure stabilizing tank, 308 - Reagent pump 500 - Control device, 501 - Control valve one, 502 - Control valve two, 503 - Control valve three, 504 - Control valve four, 505 - Manual valve one, 506 - Check valve one, 507 - Control valve five, 508 - Control valve six, 509 - Control valve seven, 510 - Control valve eight, 511 - Control valve nine, 512 - Manual valve two, 513 - Manual valve three, 514 - Manual valve four, 515 - Manual valve five, 516 - Manual valve six Detailed Implementation

[0010] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0011] The present invention provides a process piping system that uses a single pump to enable the input of liquid into and output of liquid from a storage container.

[0012] like Figure 1As shown, the process piping system of the present invention includes at least one inlet / outlet liquid loop unit. Each inlet / outlet liquid loop unit includes an inlet device 100 and an outlet device 200. The inlet device is used to inject liquid into the storage container, and the outlet device is used to output liquid from the storage container. The inlet device includes a liquid pump 1, a flow meter 102, a first inlet pipe section 101, and a second inlet pipe section 103. One end of the first inlet pipe section is connected to a liquid supply device, and the other end is sealed to the inlet of the liquid pump 1. A filter 3, a control valve 501, and a flow meter 102 are installed on the pipe. The flow meter 102 is located in front of the liquid pump 1. The first inlet pipe section is the channel through which the liquid supplied by the liquid supply device enters the liquid pump 11. One end of the second inlet pipe section is sealed to the inlet of the storage container, and the other end is sealed to the outlet of the liquid pump 1. A control valve 502 is installed on the pipe, which is the channel through which the liquid pumped by the liquid pump 1 enters the storage container. The liquid outlet device includes a first outlet pipe section 201 and a second outlet pipe section 202. One end of the first outlet pipe section 201 is sealed and connected to the outlet of the storage container, and the other end is connected to the first inlet pipe. The connection point is located between control valve 501 and flow meter 102. A control valve 503 is installed on the pipe. The first outlet pipe section 201 is a channel connecting the outlet of the storage container and the inlet of the liquid pump 1. One end of the second outlet pipe section 202 is connected to the outlet of the liquid pump 1. A control valve 504 is installed on the second outlet pipe section. The intersection of the second inlet pipe section and the second outlet pipe section is located between the outlet of the liquid pump 1 and control valve 504. Control valves 1, 2, 3, and 4 are all two-way electrically operated control valves, which can be connected to the output electrical signal of the control system. When liquid pump 1 supplies water to the storage container, control valves 1 and 2 on the inlet pipe sections 1 and 2 are opened by the control system, keeping the inlet pipe sections 1 and 2 open. Control valves 3 and 4 on the outlet pipe sections 1 and 2 are closed by the control system, keeping the outlet pipe sections 1 and 2 closed. When the mixed liquid in the storage container is discharged, the control system closes control valves 1 and 2 and opens control valves 3 and 4. Manual control of the closing of each control valve can also be used. Of course, a three-way valve can be used to replace control valves one and three. The three-way valve is located at the junction of the first section of the inlet pipeline and the first section of the outlet pipeline. A three-way valve can be used to replace control valves two and four. The three-way valve is located at the junction of the second section of the inlet pipeline and the second section of the outlet pipeline.Ideally, all control valves should be two-way electric valves, and liquid pump 1 should ideally be a vacuum pump. Because two-way electric valves have good shut-off properties, they allow the valves to be opened only after the valves to be closed are fully closed. This allows for precise control of the amount of liquid entering the storage container. Vacuum pumps, with their high flow rate, can be used in conjunction with flow meters to control the amount of liquid entering the storage container. When the flow rate measured by the flow meter reaches the set value, the control system closes the corresponding control valve, thus allowing for precise and rapid injection of liquid into the storage container. This invention's process piping system uses a structure combining a flow meter, vacuum pump, and electric valves. By rationally setting the positions of the control valves, a single liquid pump 1 is used to deliver liquid into and out of the storage container, saving on the number of pumps and reducing the cost of the piping system. This is particularly advantageous for irrigation, fertilization, and pesticide application systems. Alternatively, a control system can be omitted, and other control structures or manual control of the valves can be used. By employing the aforementioned process piping system and appropriately positioning the flow meters, automatic and precise control of the input and output liquid quantities can be achieved under the control of the control system. This eliminates the need for a proportional pump in the piping system, solving the technical problems of low flow rate, slow liquid inlet, and high cost associated with proportional pumps. Ideally, a drain outlet should be installed at the bottom of the storage container to remove waste and sediment.

[0013] like Figure 2As shown, when two or more inlet / outlet liquid loop units are set in the process piping system, two or more liquids can be input into the same storage container, allowing the different liquids to be mixed within the storage container, and then the mixed liquid can be output from the storage container for use. This structure is particularly advantageous during pesticide and fertilizer application operations. When two or more inlet / outlet liquid loop units are set, one of them is the main inlet / outlet liquid loop unit 10, and its storage device serves as a mixing container for multiple liquids, called the mixing container 8. The other inlet / outlet liquid loop units are branch inlet / outlet liquid loop units 9. The outlet of the branch inlet / outlet liquid loop unit is connected to another inlet of the mixing container of the main inlet / outlet liquid loop unit. In this way, the liquid in the storage containers of each branch inlet / outlet liquid loop unit 9 is output to the mixing container of the main inlet / outlet liquid loop unit in a predetermined amount, and the two are mixed to obtain a mixed liquid. The obtained mixed liquid flows out of the system from the outlet of the main inlet / outlet liquid loop unit. The mixing ratio of the liquid is fed back by flow meters installed on each inlet / outlet loop unit, and controlled manually or by a control system to achieve mixing and output of the liquid. Using the above-described process piping system, each inlet / outlet loop unit is equipped with a pump to handle the input and output of liquid in that unit. The flow rate of each unit is fed back by its respective flow meter, thus inputting liquid into the mixing container according to the predetermined amount, ensuring high consistency between the liquid ratio and the design ratio. The control valve 502 installed on the second section 103 of the inlet pipeline of each inlet / outlet loop unit is preferably a normally closed solenoid valve.

[0014] like Figure 3As shown, multiple parallel liquid supply branches 11, each consisting of a second inlet pipe section, a first outlet pipe section, and a storage container, can be connected in parallel within the inlet-outlet liquid circuit unit 9. This allows for the sequential supply of multiple liquids to the mixing container using a single inlet-outlet liquid circuit unit 9, increasing the number of supply channels and the types of liquids supplied. One end of the parallel liquid supply branch 11 is connected in parallel to the second inlet pipe section of the inlet-outlet liquid circuit unit 9, and the other end is connected in parallel to the first outlet pipe section of the inlet-outlet liquid circuit unit 9. The second inlet pipe section of the parallel liquid supply branch is connected to the inlet of its storage container, and the first outlet pipe section is connected to the outlet of its storage container. Multiple parallel liquid supply branches can be set up to increase the types of liquids supplied. Since the amount of different liquids fed into the storage container is measured by a flow meter, the ratio of each liquid in the storage container can be relatively accurate. By pre-calculating the ratio of various components, a mixture with the corresponding ratio can be obtained. Especially when electric valves are used for control, the precise quantity of liquid entering the storage container can be achieved by controlling the timing and sequence of their opening and closing. This eliminates the need for proportional pumps or Venturi pumps and avoids repeated adjustments and calculations in the electrical control system. Therefore, the calculation program and structure of the electrical control system are simplified, improving the overall system operating efficiency. Using this structure, a single pump can provide liquid delivery power to multiple parallel branches, reducing the number of pumps, control valves, and detectors required, thus lowering the manufacturing cost of the irrigation system.

[0015] The following describes in detail the structure of the agricultural and forestry pesticide application and irrigation system of the present invention, taking the application of pesticides and fertilizers to crops as an example. For ease of description, fertilizers and pesticides are collectively referred to as pesticides. It includes a main inlet / outlet liquid circuit unit 10 and two branch inlet / outlet liquid circuit units 9, namely branch inlet / outlet liquid circuit unit one 901 and branch inlet / outlet liquid circuit unit two 902. The main inlet / outlet liquid circuit unit is used to supply water to the mixing container. Branch inlet / outlet liquid circuit unit one is used to deliver pesticide one into pesticide container one 6 and deliver pesticide one into the mixing container in a prescribed amount. Branch inlet / outlet liquid circuit unit two 902 is used to deliver pesticide two into pesticide container two 7 and deliver pesticide two into the mixing container in a prescribed amount. Whether pesticide one and pesticide two are mixed with water simultaneously depends on the specific type of pesticide. They can enter the mixing container sequentially, mix with water separately, and then be delivered to the crops, or they can be entered sequentially or simultaneously into the mixing container to mix with water together and then be delivered to the crops. This structure ensures that the various chemicals do not come into contact with each other before entering the mixing container, allowing for more precise dosage. Furthermore, it allows for the simultaneous supply of different chemicals to the mixing container, improving mixing efficiency when the supplied chemicals are mixed with water at the same time.

[0016] Another structure involves only a main inlet / outlet loop unit 10 for water supply and a branch inlet / outlet loop unit 9 for delivering reagent one into reagent container one 6. A parallel branch 11 is provided on the branch inlet / outlet loop unit for delivering reagent two into reagent container two 7. Reagent one and reagent two are delivered using a shared reagent pump 308. This structure is suitable for scenarios where reagents are mixed separately with water and reduces the amount of reagent pump required. When injecting reagent into the mixing container, the reagent is first injected into the corresponding reagent container one 6 or reagent container two 7, and then injected into the storage container according to a set ratio to mix with water to obtain a diluted reagent. The specific process flow is as follows: Water is supplied to the mixing container through the main inlet / outlet loop unit. Open control valve 501, control valve 502, and control valve 503 of the main inlet / outlet liquid circuit unit, and close control valve 504. Water flows into the mixing container 8 through section 101 of its inlet pipeline under the action of liquid pump 1, passes through filter 3 and flow meter 102. Agent 1 is then introduced into the mixing container through the branch inlet / outlet liquid circuit unit: Open control valves 501, 502, and 503 of the branch inlet / outlet liquid circuit unit, close control valve 504, and close control valves 502 and 503 on the parallel branch. Agent 1 is then pumped into section 1 of its inlet pipeline by the agent pump, and then enters agent container 6 through filter 3 and flow meter 102. Agent 1 is stored in agent container 6. Once stored properly, the agent pump is closed. The pump closes control valve 2 (502) and control valve 1 (501) of the branch inlet / outlet liquid circuit unit, opens control valve 4 (504) on it, and restarts the agent pump to send the agent in agent container 1 into the mixing container 8 according to the set amount so that it can be mixed and diluted with water to reach the set concentration. Then, the agent pump is turned off. The mixed agent 2 is then sent to the crops. The control valve 4 on the branch inlet / outlet liquid circuit unit is closed, and control valves 3 (503) and 4 (504) on the main inlet / outlet liquid circuit unit are opened. Control valves 1 (501) and 2 (502) on it are kept closed. The liquid pump 1 is turned on to deliver the mixed agent 1 in the mixing container to the crops through the first section 201, flow agent 102 and the second section 202 of the main inlet / outlet liquid circuit unit, thus completing the application of agent 1.The application process of Agent 2 is as follows: 1. Agent 2 is fed into Agent Container 2 through a parallel branch: Close control valve 2 (502) and control valve 3 (503) on the inlet / outlet liquid circuit unit, keep control valve 4 (504) closed, open control valve 2 (502) and control valve 3 (503) on the parallel branch, start the agent pump, Agent 2 enters through the first section of the inlet pipe of the inlet / outlet liquid circuit unit, and under the action of the agent pump, enters through the filter 1 (3) and flow meter 102 installed on the inlet / outlet liquid circuit unit into the second section of the inlet pipe of the parallel branch and into Agent Container 2. After Agent 2 is stored, turn off the agent pump and close control valve 2 (502) on the parallel branch. 2. Open control valve 3 (503) and control valve 1 (501) on the branch inlet / outlet liquid circuit unit, then turn on the agent pump. The agent 2 in agent container 2 enters the mixing container through the first section of the parallel branch inlet pipe, flow meter 102, and the second section of the inlet pipe on the branch inlet / outlet liquid circuit unit to be mixed and diluted with water to reach the specified concentration. At the same time, close control valve 1 (501) and control valve 4 (504), open control valve 502 and control valve 503, and start liquid pump 1. The system can realize efficient mixing of water, fertilizer, water and agent, etc. The mixed liquid is then transported to the crops. The process of transporting the mixture from the mixing container to the crops is the same as that of agent 1.

[0017] Ideally, EC / pH sensors should be installed on a section of the outlet pipeline of both the main inlet / outlet liquid loop unit and the branch inlet / outlet liquid loop unit to monitor changes in liquid concentration and pH value in real time. Each EC / pH sensor is connected to the control system to detect the EC and pH values ​​of the reagent before mixing and after mixing and dilution, respectively. The system monitors the proportional concentration of the reagent before and after mixing in real time. When the system detects a significant change in EC / pH value, the control system will issue an alarm. A temperature detection device should be installed in the system to monitor the temperature of the liquid within the system. The temperature of the liquid within the system is correlated with the EC and pH values; changes in temperature will cause corresponding changes in the EC and pH values ​​of the reagent. Higher temperatures will increase EC and pH values, while lower temperatures will decrease them. When the limits for increase or decrease are exceeded, the control system will identify this as abnormal and issue a reminder to check whether there have been changes in the water flow or reagent dosage. This system uses EC and pH values ​​only as reference values ​​to determine whether the liquid supply within the system is normal. Precise control is achieved through control valves and flow meters installed on each liquid-to-liquid device and outlet, as well as flow rates set within the control system. This avoids false alarms caused by changes in EC and pH values ​​due to external environmental factors, resulting in more accurate and reliable control of the reagent dosage. In the preferred embodiment, each electrically controlled valve is accompanied by a manual valve, allowing for control of the pipeline system in case of power failure or loss of control. The control system employs programmable logic controllers such as chips and PLCs.

Claims

1. A process piping system for applying agricultural and forestry pesticides and irrigation, characterized in that: The system includes an inlet / outlet circuit unit, which comprises an inlet device and an outlet device. The inlet device includes a first inlet pipe and a second inlet pipe. One end of the first inlet pipe is connected to a liquid supply device, and the other end is sealed to the inlet of a liquid pump. One end of the second inlet pipe is connected to the inlet of a storage container. A flow meter is located on the first inlet pipe. The outlet device includes a first outlet pipe and a second outlet pipe. One end of the first outlet pipe is connected to the outlet of the storage device, and the other end is connected to the first inlet pipe. The connection point between the two is located at the inlet of the liquid pump. One end of the second outlet pipe is connected to the second inlet pipe, and its connection point is located at the outlet of the liquid pump. A drain outlet is provided at the bottom of the storage container. Under the control of the liquid on / off control valve, when both the first and second sections of the inlet pipeline are in the open state, both the first and second sections of the outlet pipeline are in the closed state; it also includes a control system, with the control valve and the liquid pump connected to the output terminal of the control system, and the flow meter connected to the input terminal of the control system. The control system controls the on / off state of the liquid pump and the control valve. Under the control of the control system, the control valve that needs to be closed is completely closed before it is opened. The connection point between the first section of the outlet pipeline and the first section of the inlet pipeline is located between the control valve and the flow meter.

2. The process piping system for applying agricultural and forestry pesticides and irrigation as described in claim 1, characterized in that: The control valves are respectively installed on the first and second sections of the inlet pipeline, and on the first and second sections of the outlet pipeline.

3. A process piping system for applying agricultural and forestry pesticides and irrigation as described in claim 1 or 2, characterized in that: In the liquid outlet pipeline A section The device is equipped with an EC sensor and a PH sensor. When a control system is set up, both the EC sensor and the PH sensor are connected to the input signal of the control system.

4. The process piping system for applying agricultural and forestry pesticides and irrigation as described in claim 3, characterized in that, A pressure gauge and a pressure sensor are installed on the two sections of the liquid outlet pipeline.

5. The process piping system for applying agricultural and forestry pesticides and irrigation as described in claim 1, characterized in that, It includes at least two liquid inlet / outlet circuit units, one of which is the main liquid inlet / outlet circuit unit, and the others are branch liquid inlet / outlet circuit units. The liquid storage container of the main liquid inlet / outlet circuit unit serves as a mixing container. The liquid outlet end of the second section of the liquid outlet pipeline of the branch liquid inlet / outlet circuit unit is connected to the liquid inlet of the liquid storage container of the main liquid inlet / outlet circuit unit. The control valve on the second section of the liquid inlet pipeline of the branch liquid inlet / outlet circuit unit is a solenoid valve. A filter is installed on the first section of the liquid inlet pipeline.

6. The process piping system for applying agricultural and forestry pesticides and irrigation as described in claim 5, characterized in that, At least one of the aforementioned inlet / outlet liquid circuit units is provided with at least one parallel branch consisting of two sections of inlet pipe, one section of outlet pipe, and a liquid storage container. The pipe of the second section of inlet pipe is connected to the second section of outlet pipe of the inlet / outlet liquid circuit unit, and the connection point is located at the outlet end of the liquid pump. The pipe of the first section of outlet pipe is connected to the first section of inlet pipe of the inlet / outlet liquid circuit unit, and the connection point is located at the inlet end of the liquid pump.

7. An agricultural and forestry pesticide application and irrigation system, characterized in that, Includes the process piping system for applying agricultural and forestry pesticides and irrigation as described in any one of claims 1-4.

8. The agricultural and forestry pesticide application and irrigation system as described in claim 7, characterized in that, The process piping system for applying agricultural and forestry pesticides and irrigation as described in any one of claims 5-7 uses a pesticide container as the storage container for the inlet and outlet liquid circuit unit, and the pesticides introduced into the pesticide container are different.

9. An agricultural and forestry pesticide application and irrigation system as described in claim 8, characterized in that, Under the control of the control system, the main liquid inlet / outlet circuit unit and the branch liquid inlet / outlet circuit unit can simultaneously or at different times input liquid into the mixing container for mixing.

10. An agricultural and forestry pesticide application and irrigation system as described in claim 8, characterized in that, EC and pH sensors are used to obtain the EC and pH values ​​of the liquids in each inlet and outlet liquid loop unit. When the system detects a significant change in the EC / pH value, the control system issues an alarm. A temperature detection device is installed in the system to monitor the temperature of the liquid within the system. The temperature of the liquid within the system is correlated with the EC and pH values. When the temperature changes, the EC and pH values ​​of the reagent change accordingly. When the temperature is high, the EC and pH values ​​increase accordingly, and when the temperature is low, the EC and pH values ​​decrease accordingly. When the increase or decrease limits are exceeded, the control system identifies it as abnormal and issues an alert to check the liquid flow rate.

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