Field Irrigation Trusteeship System and Its Application Method

Abstract

An irrigation trusteeship system for large fields, comprising a water source well, an automatic irrigation system and pipelines; the automatic irrigation system is arranged near the water source well, and the pipelines are connected to the water source well to ensure water supply; the pipelines include a main pipeline and branch pipe belts; the automatic irrigation system is arranged on the main pipeline, and the main pipeline is arranged at the head of the irrigation area; a plurality of branch pipe belts are vertically connected to the main pipeline through connectors and laid in the irrigation area; control valves are installed on the branch pipe belts; a flowmeter and a pressure gauge are installed on the main pipeline; each of the control valves, the flowmeter and the pressure gauge is respectively connected to the automatic irrigation system. The trusteeship system disclosed by the present invention has a simple structure and is convenient to operate. The method disclosed by the present invention can implement trusteeship irrigation for large-field farmland, perform centralized irrigation for different crops, realize centralized irrigation and maintenance of large-field farmland by limited personnel, save time and effort, have high irrigation efficiency, timely and accurate data, and realize trusteeship of large-field maintenance.

Description

Technical Field

[0001] The invention relates to a field irrigation system and method, in particular to a trusteeship system suitable for field irrigation in a unit area and an application method thereof. Background Art

[0002] At present, with the continuous development of intelligent control technology, intelligent irrigation has become the dominant mode of farmland irrigation. Existing intelligent irrigation is generally controlled by users themselves through intelligent devices such as mobile phones and controllers.

[0003] Many places have begun to implement the farmland unit responsibility system, that is, the village committee or community will uniformly manage the farmland and have dedicated personnel to maintain it, forming a trusteeship and maintenance of large-scale farmland. Therefore, large-scale field irrigation trusteeship and maintenance has become an indispensable development trend. The best embodiment of centralized trusteeship of large fields is farmland harvesting. The same crops are more conducive to large-scale trusteeship and maintenance. However, there are currently no intelligent facilities on the market for centralized maintenance of managed large fields, especially centralized control of large-scale field irrigation. Household control can no longer meet the needs of centralized trusteeship and maintenance of large-scale farmland. Summary of the invention

[0004] The present invention is aimed at the lack of large-scale centralized irrigation technology for farmland mentioned in the background technology. Firstly, it provides a trusteeship system for realizing large-scale irrigation, and secondly, it provides a method for implementing centralized irrigation and maintenance of large-scale fields using this system.

[0005] The technical solution adopted by the present invention is: a field irrigation trusteeship system, including a water source well, an automatic irrigation system and a pipeline; the automatic irrigation system is arranged near the water source well, and the pipeline is connected to the water source well to ensure water supply; the pipeline includes a main pipeline and a branch pipeline; the automatic irrigation system is arranged on the main pipeline, and the main pipeline is arranged at the head of the irrigation area; a plurality of branch pipelines are vertically connected to the main pipeline through connecting parts and laid in the irrigation area; a control valve is installed on the branch pipeline; a flow meter and a pressure gauge are installed on the main pipeline; each of the control valves, flow meters and pressure gauges is respectively connected to the automatic irrigation system.

[0006] The branch pipe belts are laid along the length direction of the irrigation area, and the distance between adjacent branch pipe belts is 6-8 meters.

[0007] The automatic irrigation system includes a system decision center, a valve group, a cloud center and a mobile phone APP; the system decision center is composed of a filter device, a field fertilizer applicator, and a control center, and is integrated in a cabinet;

[0008] The control center includes a controller and an external control module; the external control module is wired to the controller through a 485 transmission method to control the filtration device and the field fertilizer applicator and collect the flow rate; the controller is wirelessly connected to the valve group through the lora mode, and the controller is connected to the flow meter and pressure gauge on the pipeline to collect, store, and transmit commands for grid parameters, pipeline flow rate, pipeline pressure, and power consumption parameters;

[0009] The mobile phone APP completes user data entry, data display, and command sending;

[0010] The control center processes the data and connects and transmits through a wireless network to the cloud center and the mobile phone APP.

[0011] For the field irrigation trusteeship system, the wired turbine flow meter is used to detect the pipeline flow rate, and the 4-20ma pressure transmitter with a range of 1MPa is used to detect the pipeline pressure.

[0012] A method for field irrigation trusteeship using the trusteeship system:

[0013] (1) Equipment installation

[0014] Equipment installation mainly includes the installation of the system decision center and the valve group:

[0015] Installation of the system decision center: Transport the system decision center to the wellhead, connect the water inlet pipe and the water outlet pipe of the system decision center to the quick connector ports at the wellhead three-way through quick connectors, and discharge the pressure relief port to the wellhead;

[0016] Installation of the valve group: Users select the required number of valves according to the irrigation area for on-site installation;

[0017] (2) Pipe belt laying

[0018] The user opens the pre-downloaded mobile phone APP software and logs in; the user clicks on the pipe laying module in the mobile phone APP, and at this time, a command is sent to the control center of the system decision center, and it enters the valve matching mode. After the matching is completed, it reports to the cloud center;

[0019] After the pipe laying is completed, the corresponding pipe length is input through the mobile phone APP, and the center sends the pipe belt length and valve status corresponding to the valve to the control center for recording;

[0020] (3) Automatic rotational irrigation

[0021] The valves of the micro-spray belt that have been laid can perform automatic rotational irrigation operations. The user enters the water requirement per mu in the mobile phone APP to start automatic rotational irrigation. During rotational irrigation, the control center records the number of opened valves and monitors the pipeline flow rate to determine whether the flow rate is within the required range and decides whether to adjust the number of opened valves to achieve a balance between supply and demand;

[0022] (4) Data statistics and display

[0023] Select according to the user's irrigation requirements. After the predetermined requirements are met, the irrigation is completed and the valve is closed.

[0024] The data statistics in step (4) include the irrigation process and after the irrigation is completed;

[0025] During irrigation:

[0026] Current irrigation valve group: The mobile phone APP displays the current number of irrigation valves and the status of the valves in this group in real time. You can manually call the irrigation time, fertilizer application amount, and irrigation amount of this group of valves;

[0027] Irrigation completed valve group: The mobile APP displays the number of acres of irrigation, water consumption, electricity consumption, fertilizer amount, irrigation time and other information;

[0028] After irrigation is completed:

[0029] Usage information: The mobile phone APP displays the current number of irrigation valves and the status of the valves in this group in real time. It can also manually call for the irrigation time, fertilizer application amount, and irrigation amount of the valves in this group.

[0030] Irrigation completion information: The mobile APP displays information such as the number of acres of irrigation completed, the total number of valves, the total water consumption, the total electricity consumption, the total amount of fertilizer applied, the average water consumption per mu, the average amount of fertilizer applied per mu, the total irrigation time, and a comparison chart of water consumption and time with traditional irrigation methods.

[0031] The pipe laying mode in step (2) is water-filled pipe laying;

[0032] The user clicks on pipe laying through the APP, and then a command is sent to the control center to enter the valve matching mode. The valve that needs pipe laying is triggered by a magnet on site, and the valve reports its own matching unique hardware ID. After the control center in matching mode receives the reported valve hardware ID, it matches the valve and reports it to the cloud center. At this time, the APP will show that a new valve has been added;

[0033] The water-filling pipe-laying system tests the reasonable pressure range required for the pipe-laying mode through on-site experiments. The mobile phone APP sends this pressure value to the control center, and the control center adjusts the pressure relief butterfly valve according to this pressure value to achieve constant pressure water filling. At the same time, users can manually adjust the water filling pressure in real time according to actual needs.

[0034] The managed application process also includes field fertilization operations:

[0035] During rotation irrigation, the user selects the field fertilization module in the mobile phone APP, and enters the average fertilizer amount per mu, the average water per mu before fertilizer, and the average water per mu after fertilizer information to start the irrigation and fertilization function.

[0036] The amount of fertilizer is injected from the main irrigation pipe. It is necessary to ensure that the pre-fertilization water, fertilizer amount, and post-fertilization water of each group of valves are synchronized, that is, the valve cannot be switched during the process of fertilization and rotation irrigation;

[0037] The control center calculates the pre-fertilization water volume, fertilizer volume, and post-fertilization water volume of each group of valves based on the average irrigation water volume and fertilizer volume per mu. During the rotation irrigation process, fertilization is started after the pre-fertilization water is filled. The control center deducts the pre-fertilization water volume, post-fertilization water volume, and water volume during the fertilization process from the medium irrigation water volume to obtain the ratio of the water volume and fertilizer volume during the fertilization process. During the fertilization process, the fertilizer flow rate and pipeline flow rate are adjusted according to this ratio to carry out fertilization. After fertilization is completed, irrigation with post-fertilization water is carried out.

[0038] Compared with the prior art, the trusteeship system disclosed in the present invention has a simple structure and is easy to operate. The method disclosed in the present invention can implement trusteeship irrigation for large areas of farmland and carry out centralized irrigation for different crops, so that limited personnel can implement centralized irrigation and maintenance of large areas of farmland, which saves time and effort, has high irrigation efficiency, and the data is timely and accurate, thus realizing trusteeship for large-scale field maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a block diagram of the control center connection structure in the present invention.

[0040] Figure 2 This is a functional flow chart of the system decision center of the present invention.

[0041] Figure 3 It is a schematic diagram of laying the pipe belt in the present invention. DETAILED DESCRIPTION

[0042] The following is combined with Figures 1-3 The present invention is further described in detail.

[0043] The trusteeship system disclosed in the present invention is mainly a trusteeship system for irrigation and maintenance of large-scale farmland, which is suitable for centralized management of farmland use by village committees or communities and is operated by dedicated personnel.

[0044] A field irrigation trusteeship system includes a water source well, an automatic irrigation system and a pipeline. The hardware of the automatic irrigation system is arranged near the water source well, and the pipeline is connected to the water source well to ensure water supply. The pipeline includes a main pipeline and a branch pipeline; the automatic irrigation system is arranged on the main pipeline, and the main pipeline is arranged at the head of the irrigation area. Several branch pipelines are vertically connected to the main pipeline through connectors such as pipeline tees and laid in the irrigation area; control valves are installed on the branch pipelines; flow meters and pressure gauges are installed on the main pipeline; each of the control valves, flow meters and pressure gauges is respectively connected to the automatic irrigation system. The branch pipelines are laid along the length direction of the irrigation area, and the distance between adjacent branch pipelines is 6-8 meters, preferably 6 meters.

[0045] The automatic irrigation system includes a system decision-making center, a valve group, a cloud center, and a mobile phone APP; the system decision-making center consists of a filtering device, a field fertilizer applicator, and a control center, and is integrated in a cabinet;

[0046] The control center includes a controller and an external control module; the external control module is connected to the controller through a 485 transmission method to realize the control and flow rate acquisition of the filtering device and the field fertilizer applicator; the controller is connected to the valve group, the flow meter and the pressure gauge on the pipeline to collect, store and transmit instructions for grid parameters, pipeline flow rate, pipeline pressure and power consumption parameters; the mobile phone APP completes user data entry, data display, and instruction sending; the control center processes the data and is connected and transmitted to the cloud center and the mobile phone APP through a wireless network. The external control module includes a fertilizer applicator power supply control module, a flow meter power supply and acquisition module, a filtering device control and power supply module, etc.

[0047] The limited turbine flow meter is used to detect the pipeline flow rate, and the 4-20ma pressure transmitter with a measuring range of 1MPa is used to detect the pipeline pressure.

[0048] The method for field irrigation using the above trusteeship system is as follows:

[0049] (1) Equipment installation

[0050] The equipment installation is mainly for the installation of the system decision-making center and the valve group.

[0051] System decision-making center installation: Transport the system decision-making center to the wellhead, and dock the water inlet pipeline and the water outlet pipeline of the system decision-making center with the quick connector at the wellhead tee through a non-leaking and pressure-bearing quick connector, and discharge the pressure relief port to the wellhead. The system decision-making center includes two types: fixed and mobile: Most of those installed on site are fixed in the cabinet, which is fixed; those that can be moved and placed at the water outlet are mobile.

[0052] In order not to change the original control method of the water pump, take the original control method as the main power switch, connect the power supply of the system decision-making center to the lower port of the original control through a waterproof high-power socket and plug, and connect the water pump to the lower port of the system decision-making center in the same way of plug to realize the system decision-making center as the lower series control part of the original control method. After the installation is completed, turn on the original control power supply and power on the system decision-making center.

[0053] Note: After use, connect the water pump back to the original control method to restore the original control and irrigation mode.

[0054] Installation of valve group: Users can randomly select the required number of valves for on-site installation according to the irrigation area (each valve has a unique hardware ID for valve identification). The valves are in the default closed state. After the valve assembly is completed, manually open the corresponding water outlet of the valve.

[0055] (2) Laying of pipe belt

[0056] After the equipment installation is completed, the user opens the APP software and logs in through the account and password. To record information such as the user's usage location and well number (for the subsequent traceability system), the user first needs to select the county, town, village, and well number information, and then select the control center to be used through the online list or by scanning (the control center has a unique hardware ID). At this time, the APP needs to prompt whether the control center is connected to the network. Only when the connection is successful can it be added. After the addition is completed, proceed to the next step of pipe laying operation.

[0057] Pipe laying mode: The user clicks on pipe laying through the APP. At this time, a command is sent to the control center to enter the valve matching mode. At this time, on-site, the valve to be laid is triggered by a magnet, and the valve will report the hardware ID (while verifying whether the valve wireless is normal). After the control center in the matching mode receives the reported valve hardware ID, it performs valve matching and reports to the center. At this time, the APP will display the addition of a new valve (the status is not laid. The valve status is divided into three states: not laid, laid but not irrigated, and irrigated). Since the pipe belt may be blown off the laying track by the wind during the pipe laying process, the user can choose the water-filled pipe laying (an optional function) mode at this time.

[0058] The water-filled pipe laying adopts the principle of constant-pressure pipe laying. Through on-site experiments, the reasonable pressure range required for the pipe laying mode is tested. The mobile APP sends this pressure value to the control center, and the control center adjusts the pressure relief butterfly valve according to this pressure value to achieve constant-pressure water filling. At the same time, the user can manually adjust the size of the water filling pressure in real time according to actual needs.

[0059] After the pipe laying is completed, manually input the corresponding pipe length through the APP, and the center sends the pipe belt length and valve status corresponding to the valve to the control center for recording.

[0060] (3) Automatic rotation irrigation

[0061] The valves of the micro-spray belt that have been laid can perform automatic rotation irrigation operations. The user inputs the water requirement per mu to start automatic rotation irrigation. During the rotation irrigation, the control center records the number of opened valves and monitors the flow rate of the pipeline to determine whether the flow rate is within the required flow rate range, and decides whether to adjust the number of opened valves to achieve a balance between supply and demand.

[0062] The following is a specific example for illustration:

[0063] ① Suppose 8 pipe belts have been laid, with lengths of 200, 200, 280, 280, 300, 300, 250, and 250 meters respectively. Each 100-meter pipe belt requires a flow rate of 5 m3 / h (each 100-meter pipe belt has a flow rate adjustment space of ±1.5 m3 / h, that is, the flow rate range per 100 meters is [3.5, 6.5], unit: m3 / h, and this parameter is sent from the center to the control center);

[0064] ② Suppose the irrigation water volume required per mu of land for users is 60 cubic meters;

[0065] ③ If the control center opens the first three valves, the total length is 680 meters, and the required standard instantaneous flow rate is 34 m3 / h (the adjustment range is [23.8, 44.2], unit: m3 / h); the pipe interval is 2 meters, corresponding to an area of 2.04 mu, and the required water volume is 122.4 cubic meters. The water volumes required for the first three pipe belts are 36, 36, and 50.4 cubic meters respectively;

[0066] ④ After irrigation starts, the control center first performs a start-up delay (skipping the instability during the start-up period, making the flow rate tend to be stable, and testing the reasonable delay value through experiments) and waits. Then it collects the real-time pipe flow rate value. When the instantaneous flow rate is between [23.8, 44.2], the number of opened valves remains unchanged. At the same time, it measures the total water consumption of the pipeline and calculates the total water consumption according to the pipe length corresponding to the valves and distributes it to the corresponding valves. For example, if the pipeline uses 68 cubic meters of water, the water consumption of the first three valves is 20, 20, and 28 cubic meters respectively;

[0067] ⑤ When the water consumption of the corresponding valve reaches the required water volume, valve switching is performed. First, open the next group of valves, and then close the current valve; and record the irrigation status, switch status, irrigation water volume, irrigation time, length, etc. of the valves that have completed irrigation, and report to the center at the same time;

[0068] ⑥ When it is judged that the flow rate is less than 23.8, close the third valve, and judge whether it meets the flow rate range of [14, 26] for the remaining two valves with a total length of 400. If the condition is met, only perform the operation of closing the third valve and settle the current irrigation water volume of the third valve. When the third valve is opened again in the next group, cumulative calculation is performed based on the current water volume; here, it is assumed that the lengths of the first two pipe belts are 150 meters and the flow rate range is [10.5, 19.5]. At this time, the flow rate after closing the third pipe belt is higher than the required flow rate, and it needs to be adjusted by adjusting the pressure relief butterfly valve;

[0069] ⑦ Similarly, when the flow rate is greater than the interval of 44.2, judge whether the flow rate meets the flow rate range after opening the fourth valve. If it meets the condition, open the fourth valve. If it does not meet the condition, perform pressure relief adjustment through the pressure relief valve;

[0070] ⑧ When the pressure relief valve is opened and the flow rate changes to a lower value, first close the pressure relief butterfly valve until it is fully closed, and then adjust the number of valves.

[0071] ⑨ During the rotational irrigation process, constant flow rate regulation is adopted to achieve automatic rotational irrigation. Since it is constant flow rate regulation, the pipeline pressure theoretically tends to be stable. When the pipeline pressure exceeds the upper limit, three pressure values are continuously collected at intervals of 1 s (to eliminate the influence caused by inaccurate individual collections). If all three values exceed the pressure upper limit, the current irrigation flow rate and other information are settled, and alarm shutdown processing is performed.

[0072] ⑩ When switching the valve group, if the pressure relief butterfly valve is in the open state, the butterfly valve needs to be closed to ensure sufficient flow rate. After the switching is completed, if the flow rate does not meet the requirements, the butterfly valve is used for pressure relief again.

[0073] (4) Field fertilization

[0074] As an auxiliary function of irrigation, users can select field fertilization during rotational irrigation. After inputting the information of fertilizer application per mu, water before fertilization per mu, and water after fertilization per mu, the irrigation and fertilization function can be started.

[0075] Since the fertilizer application amount is injected through the main pipeline, it is necessary to ensure the synchronization of the water before fertilization, fertilizer application amount, and water after fertilization for each group of valves, that is, the valves cannot be switched during the fertilization and rotational irrigation process. For example, if there are three valves currently applying fertilizer and the flow rate decreases, one pipe belt needs to be closed. The closed pipe belt will directly apply fertilizer when the next group is opened, and the other pipe belts need to have water before fertilization, and the states are not synchronized.

[0076] Based on the above situation, large flow rate regulation is adopted (statistical instantaneous fluctuation ranges of the well at different time points during the irrigation peak period, and the feasibility of this scheme is verified through on-site tests), that is, the flow rate is adjusted to the right interval near the required flow rate of the pipe belt. Taking the previous irrigation data as an example, the standard instantaneous flow rate of the three pipe belts is 34 m³ / h (the adjustment interval is [23.8, 44.2], unit: m³ / h). When starting, the pipeline flow rate needs to reach within the range of 34 - 44.2. If it is less than 34, one less valve is opened. After the valves are selected, the irrigation and fertilization of this group start, and the number of valves in this group is not changed during the process. When the flow rate increases, the pressure relief valve is used for pressure relief.

[0077] When switching the valve group, close the pressure relief butterfly valve, and collect the maximum flow rate of the main pipeline. Based on this maximum flow rate, judge the number of valves to be opened in the next group, and calculate the right interval of the pipeline instantaneous flow rate required for the opened valve group.

[0078] The control center calculates the water volume before fertilization, fertilization amount, and water volume after fertilization for each group of valves based on the irrigation water volume per mu and fertilization amount per mu. During the rotational irrigation process, when the water before fertilization is irrigated, fertilization is started. The control center subtracts the water volume before fertilization, water volume after fertilization, and the water volume during the fertilization process from the irrigation water volume to obtain the ratio of the water volume and fertilization amount during the fertilization process. During the fertilization process, the fertilization flow rate and pipeline flow rate are adjusted to apply fertilizer according to this ratio. After fertilization, irrigation with water after fertilization is carried out.

[0079] During the fertilization process, if it is detected that there is no fertilizer amount in the fertilizer bucket, fertilization is automatically paused, and the fertilized amount of each current valve is recorded. At the same time, the audible and visual alarm is turned on and reported to the cloud center. The cloud center can issue instructions, display information, query information, etc., to prompt the user to replenish the fertilizer amount. After the fertilizer amount is replenished, fertilization irrigation can continue.

[0080] Note: The fertilization pipeline needs to be installed at the lower outlet of the irrigation pipeline flowmeter;

[0081] (5) Data statistics and display

[0082] During irrigation:

[0083] a. Current irrigation valve group: The mobile APP can display the current number of irrigation valves and the status of this group of valves in real time, and can manually call and measure the irrigation time of this group of valves, the fertilized amount of this group, and the irrigated amount of this group;

[0084] b. Irrigation completed valve group: The mobile APP displays information such as the irrigated mu number, water consumption, power consumption, fertilization amount, and irrigation duration;

[0085] Irrigation completed:

[0086] a. Usage information: The mobile APP can display the current number of irrigation valves and the status of this group of valves in real time, and can manually call and measure the irrigation time of this group of valves, the fertilized amount of this group, and the irrigated amount of this group;

[0087] b. Irrigation completion information: The mobile APP displays information such as the irrigated mu number, total number of valves, total water consumption, total power consumption, total fertilization amount, water consumption per mu, fertilization amount per mu, total irrigation duration, etc., as well as the comparison chart of water consumption and time used with the traditional irrigation method, reflecting the advantages of automatic rotational irrigation.

[0088] During actual use, the working mode can be selected through the mobile APP, such as the pipe laying mode, irrigation mode, fertilization mode, etc. The APP will send the selected result to the system decision-making center, and the system decision-making center will perform the corresponding steps of the process according to the user's selection.

[0089] If the irrigation mode is selected, then according to the appendix Figure 2Operate according to the process of "irrigation mode" in it. The set value in "flow rate reaches the set value" is calculated based on the pipe length and interval for the number of mu, calculates the required flow rate for each group of valves according to the flow rate range with the best sprinkler irrigation effect per 100-meter pipe belt, and determines the number of valves to be opened based on the total flow rate of the pipeline at this time;

[0090] If the pipe-laying mode is selected, then follow the appendix Figure 2 Operate according to the process of "pipe-laying mode" in it. The specified value in "reach the specified value" needs on-site testing, that is, how much flow rate and pressure are required when each pipe belt is laid;

[0091] If the fertilization mode is selected, then follow the appendix Figure 2 Operate according to the process of "fertilization mode" in it;

[0092] If the free irrigation mode is selected, then follow the appendix Figure 2 Operate according to the process of "free irrigation" in it, where the irrigation amount is subject to manual operation control.

Claims

1. Application method of a field irrigation trusteeship system Characterized in that The trusteeship system includes a water source well, an automatic irrigation system and pipelines; the automatic irrigation system is arranged near the water source well, and the pipelines are connected to the water source well to ensure water supply; the pipelines include a main pipeline and branch pipe belts; the automatic irrigation system is set on the main pipeline, and the main pipeline is set at the head of the irrigation area; several branch pipe belts are vertically connected to the main pipeline through connectors and laid in the irrigation area; control valves are installed on the branch pipe belts; a flow meter and a pressure gauge are installed on the main pipeline; each of the control valves, flow meter and pressure gauge is connected to the automatic irrigation system respectively; The automatic irrigation system includes a system decision-making center, a valve group, a cloud center and a mobile phone APP; Application method: (1)Equipment installation Installation of the system decision-making center: Transport the system decision-making center to the wellhead, dock the water inlet pipe and outlet pipe of the system decision-making center with the quick connector ports at the wellhead three-way through quick connectors, and discharge the pressure relief port to the wellhead; Installation of the valve group: Users select the required number of valves according to the irrigation area and install them on site; (2)Pipe belt laying The pipe belt laying mode is water-filled pipe laying; The user clicks on the APP to lay the pipe, and at this time, an instruction is sent to the control center to enter the valve matching mode. On site, the valve that needs to lay the pipe is triggered by a magnet, and the valve reports its own unique hardware ID for matching. After the control center in the matching mode receives the reported valve hardware ID, it performs valve matching and reports to the cloud center. At this time, the APP will display the addition of a new valve; For water-filled pipe laying, the reasonable pressure range required for the pipe laying mode is tested through on-site experiments. The mobile phone APP sends this pressure value to the control center, and the control center adjusts the pressure relief butterfly valve according to this pressure value to achieve constant pressure water filling; at the same time, the user can manually adjust the size of the water filling pressure in real time according to actual needs; After the pipe laying is completed, the corresponding pipe length is input through the mobile phone APP, and the system decision-making center sends the pipe belt length and valve status corresponding to the valve to the control center for recording; (3)Automatic rotation irrigation The valves of the micro-spray belt that have been laid can perform automatic rotation irrigation operations. The user inputs the water requirement per mu in the mobile phone APP to start automatic rotation irrigation. During rotation irrigation, the control center records the number of opened valves and monitors the flow of the pipeline, judges whether the flow is within the required flow range, and decides whether to adjust the number of opened valves to achieve a balance between supply and demand; (4)Data statistics and display According to the selection of the user's irrigation requirements, after reaching the predetermined requirements, the irrigation is completed and the valve is closed.

2. The application method of the field irrigation trusteeship system according to claim 1 Characterized in that The branch pipe belts are laid along the length direction of the irrigation area, and the distance between adjacent branch pipe belts is 6-8 meters.

3. The application method of the field irrigation trusteeship system according to claim 1 Characterized in that The system decision-making center is composed of a filtering device, a field fertilizing machine and a control center, and is integrated in a cabinet; The control center includes a controller and an external control module; the external control module is connected to the controller through a 485 transmission method to realize the control and flow rate acquisition of the filtration device and the field fertilizer applicator; the controller is wirelessly connected to the valve group through the lora mode, and the controller is connected to the flow meter and pressure gauge on the pipeline to collect, store, and transmit commands for grid parameters, pipeline flow rate, pipeline pressure, and power consumption parameters; The mobile phone APP completes user data entry, data display, and command sending; The control center processes the data and connects and transmits with the cloud center and the mobile phone APP through a wireless network.

4. The application method of the field irrigation trusteeship system according to any one of claims 1-3, characterized in that, The wired turbine flow meter is used to detect the pipeline flow rate, and the 4-20ma pressure transmitter with a range of 1MPa is used to detect the pipeline pressure.

5. The application method of the field irrigation trusteeship system according to claim 1, characterized in that, The data statistics in step (4) include during the irrigation process and after the irrigation is completed; During the irrigation process: Current irrigation valve group: The mobile phone APP can display the current number of irrigation valves and the status of this group of valves in real time, and manually call to measure the irrigation time, the amount of fertilizer applied to this group, and the amount of water irrigated by this group of valves; Irrigation completed valve group: The mobile phone APP displays the irrigated mu number, water consumption, power consumption, fertilizer application amount, and irrigation duration information; After the irrigation is completed: Usage information: The mobile phone APP can display the current number of irrigation valves and the status of this group of valves in real time, and manually call to measure the irrigation time, the amount of fertilizer applied to this group, and the amount of water irrigated by this group of valves; Irrigation completion information: The mobile phone APP displays the irrigated mu number, the total number of valves, the total water consumption, the total power consumption, the total fertilizer application amount, the average water consumption per mu, the average fertilizer application amount per mu, the total irrigation duration information, and the comparison chart of water consumption and time used with the traditional irrigation method.

6. The application method of the field irrigation trusteeship system according to claim 1, characterized in that, The field fertilizer application operation is also included during the trusteeship application process: When the user selects the field fertilizer application module in the mobile phone APP during the rotational irrigation and inputs the average fertilizer application amount per mu, the average water before fertilizer per mu, and the average water after fertilizer per mu information, the irrigation and fertilization function can be started, The fertilizer application amount is injected by the main irrigation pipeline, and it is necessary to ensure that the water before fertilizer, the fertilizer application amount, and the water after fertilizer of each group of valves are synchronized, that is, the valves cannot be switched during the fertilization and rotational irrigation process; The control center calculates the water volume before fertilizer, the fertilizer application amount, and the water volume after fertilizer of each group of valves according to the average irrigation water volume per mu and the average fertilizer application amount per mu. During the rotational irrigation process, when the water before fertilizer is irrigated and fertilization is started, the control center subtracts the water volume before fertilizer, the water volume after fertilizer, and the water volume during the fertilization process from the irrigation water volume to obtain the ratio of the water volume and the fertilizer application amount during the fertilization process, and adjusts the fertilization flow rate and the pipeline flow rate according to this ratio during the fertilization process for fertilization. After the fertilization is completed, the water after fertilizer is irrigated.

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