Anti-blocking method and control system for intelligent pressure adjusting drippers for Yellow River Introduction drip irrigation

Abstract

The invention provides an anti-blocking method and a control system for a Yellow River diversion drip irrigation intelligent pressure adjusting water dropper, belongs to the technical field of drip irrigation intelligent adjustment, and ensures that the system can effectively operate under various working conditions through a dynamic adjustment function and continuous optimization of pressurization parameter combination. After each blockage is solved, a new pressurization parameter combination is recorded into the controller for future use. Along with the continuous use of the drip irrigation system, when the pressurization mode of the previous test cannot solve the problem of blockage, the system needs to increase the pressurization time or the pressurization amplitude on the basis of the previous pressurization mode to carry out a new round of test, and uses a new pressurization mode to solve the problem of blockage.

Description

Technical Field

[0001] The invention belongs to the technical field of intelligent regulation of drip irrigation, and in particular relates to an anti-clogging method and control system for an intelligent pressure regulating dripper of a Yellow River drip irrigation system. Background Art

[0002] Drip irrigation technology is the most effective water-saving irrigation method in arid and water-scarce areas. It has been widely used in agriculture, forestry, urban greening and other fields. As a key component of the drip irrigation system, the emitter dissipates the energy of the pressurized water flow through the complex internal flow channel structure, so that it can be stably supplied to the soil near the root zone of the crop to meet the water requirements of the crop. The blockage of the drip irrigation system is a bottleneck restricting the application and promotion of drip irrigation technology. The prominent manifestation is the blockage of the emitter. The main reason is that the flow channel of the emitter is narrow, and impurities such as suspended particles in the water enter the irrigation channel and a series of interactions occur, which can easily cause the emitter to be blocked. The blockage problem leads to a decrease in irrigation uniformity, affects the irrigation quality, and ultimately affects the normal use of the entire drip system. It can be seen that anti-blockage is the key to the successful operation of the drip irrigation system.

[0003] Irrigation water is becoming more diversified, and complex water sources such as the Yellow River are included in the irrigation water sources. Diversified irrigation water sources make the water quality more complex. In order to prevent the emitter from clogging, the water entering the drip irrigation system needs to be filtered accordingly, but filtration cannot completely remove impurities in the water source. Small-sized sediment particles and other substances can still enter the flow channel through the filtration equipment, affecting the normal operation of the drip irrigation system and seriously affecting the service life of the drip irrigation system. When using surface irrigation water sources with high sand content such as the Yellow River, it can play a role in fertilizing the fields because it carries a lot of sediment, but in the Yellow River irrigation system, the clogging problem is also particularly prominent.

[0004] The types of emitter blockage can be divided into physical blockage, chemical blockage and biological blockage according to the causes. Among them, sediment is the main cause of physical blockage. In conventional anti-blockage research, scholars mostly explore factors such as the layout of the sedimentation tank and the material of the emitter, but ignore the influence of irrigation pressure on the anti-blockage performance of the emitter. Therefore, a pressure-regulated anti-blockage system and operation method for the Yellow River Irrigation Area are needed to solve the above problems. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a Yellow River drip irrigation intelligent pressure regulating dripper anti-clogging method and control system. The present invention is based on pulse pressurization technology, and through real-time monitoring of the system operation status, dynamically adjusts the pressure and time parameters to effectively solve the common blockage problems in the drip irrigation system.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: a method for preventing the blockage of intelligent pressure regulating drippers for drip irrigation of the yellow river, comprising the following steps:

[0007] The Yellow River drip irrigation system uses flow sensors and pressure sensors to monitor the flow and pressure data during irrigation in real time. When the detected flow rate is lower than the set threshold, the dripper is blocked and the irrigation water is pulsed and pressurized.

[0008] According to the blockage situation, the initial pulse pressure, pulse time and pulse number are intelligently and dynamically adjusted to obtain the optimal pulse pressurization combination;

[0009] Based on the optimal pulse pressurization combination, pulse pressurization processing is performed, wherein after each pulse pressurization, the flow difference before and after the pulse pressurization is compared, and the effectiveness determination result is recorded;

[0010] In response to the aggravation of the dripper blockage and the current pulse pressurization parameters cannot clear the blockage, the pressure increment and time increment are automatically increased, the pulse pressurization parameters are configured, and the pressure pump's boost amplitude, boost time and pulse number are adjusted through remote intelligent control to perform pressurization processing until the blockage is eliminated to prevent the dripper from being blocked;

[0011] In response to the end of irrigation, the backwash function is automatically triggered to remove impurities using a flushing pump and electric valve;

[0012] After the backwashing is completed, the normal standby state is restored and data recording is performed.

[0013] Furthermore, the judgment condition for judging whether the drip irrigation belt is blocked is:

[0014]

[0015] Among them, θ represents the degree of congestion, Q 实际 Indicates the actual operating flow, Q 标准 represents the standard operating flow. Furthermore, the expression of the optimal pulse pressurization combination is as follows:

[0016] A=(P i ,T i ,n i )

[0017] P i =P0+ΔP(P≤0.02MPa)

[0018] T i =T0+ΔT(T≤9min)

[0019] n i =n0+Δn(n≤7)

[0020] Among them, A represents the best combination of pulse pressure, P i represents the optimal pulse pressure, T i represents the optimal pulse time, ni Indicates the optimal number of pulses, P0 indicates the normal working pressure value, ΔP indicates the gain value of the pressurization test, P indicates the pressure of the pulse pressurization test, T0 indicates the initial setting in minutes, ΔT indicates the set pulse time gain value in minutes, T indicates the pulse time, n indicates the number of pulses, n0 indicates the initial number of pulses, and Δn indicates the number of times the set pulse number gain value is used.

[0021] Furthermore, the conditions for eliminating the blockage are as follows:

[0022]

[0023] Where d represents the difference value, Q 实际 Indicates the actual operating flow, Q 标准 Indicates standard operating flow rate.

[0024] Furthermore, the expression of the backwashing time is as follows:

[0025]

[0026] Where t represents the backwashing time, L represents the pipe length, and v represents the system flow rate;

[0027] The expression of the backwash flow rate is as follows:

[0028]

[0029] Wherein, v1 represents the backwashing velocity, d represents the sediment particle size, ε represents the porosity, and h represents the water depth; the judgment conditions for the backwashing effect are as follows:

[0030]

[0031] Among them, β represents the flushing effect coefficient, P2 represents the system pressure after flushing, and P1 represents the system pressure before flushing.

[0032] The present invention also provides a yellow river drip irrigation intelligent pressure regulating dripper anti-clogging system, which is applied to the yellow river drip irrigation intelligent pressure regulating dripper anti-clogging method, comprising:

[0033] The control system automatically identifies the optimal pulse pressurization combination and issues control instructions based on the data processed by the data processing system;

[0034] A flow sensor is used to monitor the flow change of the anti-clogging system in real time. The flow sensor is installed on the main water supply pipes at all levels of the Yellow River drip irrigation system;

[0035] A pressure sensor is used to monitor the pressure in the drip irrigation belt, and the pressure sensor is installed at the inlet of the drip irrigation belt;

[0036] A data processing system, used to collect, store and analyze data from flow sensors and pressure sensors, store data from the anti-blocking system based on a data recording function, calculate operating parameters when a blockage occurs, and transmit the data to a control system, wherein the data processing system is integrated into the control system;

[0037] A variable pressure pump, used to adjust the water supply pressure, the variable pressure pump is installed at the inlet of the main water supply pipeline;

[0038] A filter system for filtering impurities in the irrigation water source, wherein the filter is installed on the main water supply pipeline;

[0039] A backwashing system is used for flushing a drip irrigation belt in a backwashing mode by controlling an electric valve and using a flushing pump, wherein the backwashing process is automatically started in response to detecting a blockage at the end of the anti-blocking system or the end of irrigation.

[0040] The beneficial effects of the present invention are:

[0041] The present invention is based on pulse pressurization technology, monitors the system operation status in real time, and dynamically adjusts the pressure and time parameters to effectively solve the common blockage problem in the drip irrigation system. The present invention integrates multiple sensors, data processing and feedback control functions to realize the intelligent and automatic operation of the drip irrigation system. The present invention is suitable for long-term agricultural irrigation projects, especially in the Yellow River water diversion project, and can significantly improve the operating efficiency and reliability of the drip irrigation system.

[0042] The present invention effectively improves the anti-clogging ability of the drip irrigation system and reduces the manual maintenance cost by automatically adjusting the pulse pressurization parameters and implementing the terminal backwash operation. The system is particularly suitable for large-scale agricultural irrigation scenarios and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 The present invention is a flow chart of the method.

[0044] Figure 2 It is a schematic diagram of the drip irrigation system in the present invention. DETAILED DESCRIPTION

[0045] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0046] Example 1

[0047] like Figure 1 As shown, the present invention provides a method for preventing the blockage of intelligent pressure regulating drippers for drip irrigation of the Yellow River, and the implementation method thereof is as follows:

[0048] The Yellow River drip irrigation system uses flow sensors and pressure sensors to monitor the flow and pressure data during irrigation in real time. When the detected flow rate is lower than the set threshold, the dripper is blocked and the irrigation water is pulsed and pressurized.

[0049] According to the blockage situation, the initial pulse pressure, pulse time and pulse number are intelligently and dynamically adjusted to obtain the optimal pulse pressurization combination;

[0050] Based on the optimal pulse pressurization combination, pulse pressurization processing is performed, wherein after each pulse pressurization, the flow difference before and after the pulse pressurization is compared, and the effectiveness determination result is recorded;

[0051] In response to the aggravation of the dripper blockage and the current pulse pressurization parameters cannot clear the blockage, the pressure increment and time increment are automatically increased, the pulse pressurization parameters are configured, and the pressure pump's boost amplitude, boost time and pulse number are adjusted through remote intelligent control to perform pressurization processing until the blockage is eliminated to prevent the dripper from being blocked;

[0052] In response to the end of irrigation, the backwash function is automatically triggered to remove impurities using a flushing pump and electric valve;

[0053] After the backwashing is completed, the normal standby state is restored and data recording is performed.

[0054] In this embodiment, the system starts and enters a normal working state. At this time, the standard pressure of the drip irrigation system is set to 0.1MPa, and the flow sensor and pressure sensor begin to monitor the flow and pressure data in real time. When the system detects that the flow is lower than the set threshold (i.e., 75% of the normal flow), it is judged that a blockage has occurred. The control system automatically starts the pulse pressurization program according to the real-time data and adjusts the pressurization parameters. According to the collected data, the optimal pulse pressurization combination is automatically analyzed. The system initially sets the pulse pressure P to 0.1MPa, the pulse time T to 3min, and the number of pulses n to 3 times. According to the blockage situation, the system dynamically adjusts the P, T, and n values ​​until the optimal pulse pressurization combination is found; according to the optimal pulse pressurization combination, the pulse pressurization parameters are adjusted, and remote control is achieved through the communication network. After each pulse pressurization, the system compares the flow difference before and after the pulse pressurization and records the effectiveness judgment result; if it is detected that the blockage situation is aggravated and the current pressurization parameters fail to effectively clear the blockage, the system will automatically increase the pressure increment (ΔP = 0.02MPa) and time increment (ΔT = 2min), and perform the pulse pressurization test again until the blockage problem is solved. After every three irrigations, the system automatically triggers the backwash function, opens the end drain valve and starts the booster pump to remove impurities in the system through the operation of the electric valve and the transformer pump. After the flushing is completed, the system returns to normal standby mode and records relevant data.

[0055] In this embodiment, during long-term operation, the present invention continuously optimizes the pressurization parameter combination through the dynamic adjustment function to ensure that the system can operate effectively under various working conditions. After each blockage is resolved, the new pressurization parameter combination is recorded in the controller for future use. As the drip irrigation system is continuously used, when the previously tested pressurization method cannot solve the blockage problem, the system needs to increase the pressurization time or pressurization amplitude based on the previous pressurization method, conduct a new round of tests, and use a new pressurization method to solve the blockage problem.

[0056] Example 2

[0057] like Figure 2 As shown, the present invention provides an intelligent pressure regulating dripper anti-clogging system for drip irrigation of the Yellow River, which is applied to the method of Example 1, comprising:

[0058] The control system automatically identifies the optimal pulse pressurization combination and issues control instructions based on the data processed by the data processing system;

[0059] A flow sensor is used to monitor the flow change of the anti-clogging system in real time. The flow sensor is installed on the main water supply pipes at all levels of the Yellow River drip irrigation system;

[0060] A pressure sensor is used to monitor the pressure in the drip irrigation belt, and the pressure sensor is installed at the inlet of the drip irrigation belt;

[0061] A data processing system, used to collect, store and analyze data from flow sensors and pressure sensors, store data from the anti-blocking system based on a data recording function, calculate operating parameters when a blockage occurs, and transmit the data to a control system, wherein the data processing system is integrated into the control system;

[0062] A variable pressure pump, used to adjust the water supply pressure, the variable pressure pump is installed at the inlet of the main water supply pipeline;

[0063] A filter system for filtering impurities in the irrigation water source, wherein the filter is installed on the main water supply pipeline;

[0064] A backwashing system is used for flushing a drip irrigation belt in a backwashing mode by controlling an electric valve and using a flushing pump, wherein the backwashing process is automatically started in response to detecting a blockage at the end of the anti-blocking system or the end of irrigation.

[0065] In this embodiment, the pulse pressurized anti-clogging drip irrigation system of the present invention is composed of the following main parts, and each part cooperates with each other to ensure stable and efficient operation of the system.

[0066] The control system includes:

[0067] Central control unit: installed in the central control box, located in the main operation area of ​​the Yellow River drip irrigation system. The control system includes a programmable logic controller (PLC), an embedded single-chip microcomputer or a microcontroller, which is used to receive data from sensors and process and control according to preset algorithms. The location of the central control box should be convenient for connection with all sensors, actuators and data processing units, and can be remotely controlled through wired or wireless networks.

[0068] Communication module: The control system is equipped with a wireless communication module for communicating with the remote control center or other intelligent devices. The system supports real-time monitoring and adjustment via the Internet.

[0069] The sensor system includes:

[0070] Flow sensor: installed on the main water supply pipes of the drip irrigation system at all levels to monitor the flow changes of the system in real time. The data of the flow sensor will be transmitted to the control system to determine whether there is a blockage.

[0071] Pressure sensor: Installed at the inlet of the drip irrigation belt to monitor the pressure inside the drip irrigation belt. The pressure sensor helps the system adjust the operating pressure to prevent and solve blockage problems.

[0072] The data processing system includes:

[0073] Data processing unit: integrated into the control system, responsible for collecting, storing and analyzing data from sensors. Through built-in algorithms, the system can automatically identify the most effective pulse pressurization combination and adjust operating parameters when blockage occurs.

[0074] Data storage and recording: The system has data recording function and can store historical data for a long time, including pressure, flow, temperature and blockage conditions, etc., to provide a basis for system optimization.

[0075] Variable pressure pump: installed at the entrance of the main water supply pipeline, the control system controls its operating frequency to adjust the water supply pressure. The system maintains standard pressure during normal operation. When blockage occurs, the system automatically increases the pulse pressure to clear the blockage.

[0076] The filter system includes:

[0077] Filter: Installed on the main water supply pipe to filter impurities in the irrigation water source. The main filter is usually located behind the pump and in front of each sensor to ensure that the water entering the drip irrigation belt is clean and reduce the risk of clogging.

[0078] The backwash system includes:

[0079] Flushing pump: used to flush the drip irrigation belt in backwash mode. The flushing pump is triggered by the control system and automatically starts the backwash process when a blockage is detected at the end of the system or when irrigation ends.

[0080] Electric valve: The control system can remotely control the end drain valve and then start the pressure pump for flushing.

[0081] Power and energy management systems include:

[0082] Power supply system: including main power supply, backup power supply and uninterruptible power supply to ensure that the system can continue to operate stably in the event of power outage or voltage fluctuation. The power supply system is installed in the central control box and connected to the control system and data processing system.

[0083] In this embodiment, each component should be installed in a suitable position according to the system design diagram to ensure optimal performance and easy maintenance. The control system and data processing system should be centrally installed in the central control box, and the sensors should be distributed in key positions of the drip irrigation system, such as the main water supply pipeline, the entrance of each drip irrigation belt and the end of the system. The pump and valve of the backwash system should be as close as possible to the end of the drip irrigation system to reduce the backwash water flow path and ensure the backwash effect.

[0084] In this embodiment, when the system is blocked, the control system can pressurize the irrigation water to alleviate the blockage problem.

[0085] In this embodiment, the data system has a data recording function that can collect and store test data in real time, including pressure, flow and blockage conditions. The system analyzes the data through a built-in algorithm and automatically identifies the most effective pulse pressurization combination to adapt to changing blockage conditions.

[0086] In this embodiment, when an abnormal flow is detected, the pressure is increased according to the pressure increase amplitude and time determined by the data processing system. The control system is responsible for receiving and processing data from various sensors, adjusting the pulse pressure and time, and realizing remote control through connection with the Internet or other communication networks.

[0087] In this embodiment, when the drip irrigation belt is blocked again, the system can perform the following steps: configure the pulse pressurization parameters, adjust the pressure pump's boost amplitude, boost time, and pulse number through the remote control system, and determine the optimal parameter combination. Implement pulse pressurization: Start the system for pulse pressurization processing, and monitor the data fed back by the pressure sensor and flow meter. Ensure that the flow rate and pressure during the pressurization process are within the set range to effectively clear the blockage, and evaluate and adjust the effect: record and analyze the flow changes of the drip irrigation system according to the effect after pulse pressurization.

[0088] In this embodiment, the backwashing system includes a flushing pump and an electric valve. The control system determines the start and end time of the backwashing operation by detecting feedback data from the flow sensor and the pressure sensor to ensure that impurities in the system are removed in time to avoid further deterioration of blockage.

[0089] In this embodiment, during long-term operation, if it is detected that the optimal combination of pressurization parameters selected according to the first round of testing cannot meet the situation where the blockage problem worsens as the drip irrigation system operates, the system will automatically select a combination with a longer pressurization time or a higher pressurization amplitude, perform dynamic adjustments, and automatically update the newly adjusted data to the system controller for daily operation. If such a problem occurs again, this step will be repeated.

[0090] In this embodiment, the flow sensor is installed on the main pipeline of the drip irrigation system to monitor the flow changes of the system. The pressure sensor is installed at the entrance of each drip irrigation belt to monitor and control the operating pressure. The control system is installed in the central control box of the system, which is located in the center of the irrigation system and is convenient for connecting with all sensors, actuators and data processing units. The central control box is usually set in the main operation area of ​​the drip irrigation system for easy maintenance and operation. The data processing system is integrated with the control system or installed separately in the control box. It is connected to each sensor by wire or wireless means, and processes and analyzes the data collected by the sensor in real time. The location of the data processing system should be easy to exchange data with the control system. The variable pressure pump can be adjusted by the control system to adjust the operating frequency of the pump, thereby controlling the water supply pressure. The filter system is usually installed at the entrance of the water supply pipeline or on the main water supply pipeline to ensure that the water source entering the drip irrigation belt is effectively filtered to reduce the possibility of clogging. The filter should be located behind the pump and in front of each sensor to ensure the stability of water quality. The power supply system and energy management module are installed in the control box, which are responsible for powering each component of the system and managing energy use. Power systems often include backup power or uninterruptible power supplies to ensure stable operation of the system during power outages or voltage fluctuations.

[0091] In this embodiment, the system determines that the drip irrigation belt is blocked according to the following conditions:

[0092]

[0093] Among them, θ represents the degree of congestion, Q 实际 Indicates the actual operating flow, Q 标准 Indicates the standard operating flow rate. The system sets the flow rate threshold to 75% of the normal operating flow rate. When the actual flow rate of the drip irrigation belt is detected to be lower than this threshold, the system determines that a blockage has occurred.

[0094] In this embodiment, the system has an automatic control module, which is used to automatically start related functions according to the set threshold value to optimize the operation of the system. Specifically, the following technical means are included:

[0095] Control system: Programmable logic controller (PLC): The control system includes a programmable logic controller that receives real-time data from flow sensors and pressure sensors, and determines whether to start the backwash function or adjust the pressurization parameters based on the set logic. Microcontroller or embedded system: The system contains a microcontroller or embedded control unit that processes sensor data and executes control algorithms to achieve automated control. Algorithm and logic control: The built-in algorithm analyzes the sensor data, including threshold comparison, energy consumption optimization and dynamic adjustment, to decide whether to select the optimal pressurization parameter combination or start the backwash function.

[0096] Communication and network technology: Wireless communication module: The system is equipped with a wireless communication module, LoRa, which is used to transmit sensor data to the control center and realize remote monitoring and control. The system can also exchange data and transmit control instructions between devices through Ethernet or Modbus protocol.

[0097] In this embodiment, the pulse pressure and pulse time are set as follows:

[0098] The standard pressure of the system under normal working conditions is 0.1MPa. This pressure is used for normal irrigation operations to ensure stable water flow and effective coverage of the irrigation area. When any drip irrigation belt in the system is detected to be blocked, the control system starts the pulse pressurization program. The pulse pressurization test adopts a dynamic adjustment method, and the specific formula is shown as follows:

[0099] P i =P0+ΔP(P≤0.02MPa)

[0100] T i =T0+ΔT(T≤9min)

[0101] n i =n0+Δn(n≤7)

[0102] A=(P i ,T i ,n i )

[0103] Among them, ΔP is the gain value of the pressurization test, which is set to 0.02MPa; P is the pressure of the pulse pressurization test, P0 is the normal working pressure value, generally 0.10Mpa, T is the pulse time, ΔT is the pulse time gain value set to 2 minutes, T0 is the initial value set to 3 minutes, n is the number of pulses, n0 is the initial number, set to 3 times, Δn is the pulse number gain value set to 2 times, A is the best combination of pulse pressure, P i represents the optimal pulse pressure, T i represents the optimal pulse time, n i Indicates the optimal number of pulses.

[0104] Validity determination:

[0105]

[0106] After each pulse pressurization test, the system will compare the flow difference before and after the pulse pressurization. When the difference d is ≥ 5%, it means that the system's pulse pressurization parameters effectively clear the blockage problem. 实际 Indicates the actual operating flow, Q 标准 Indicates that the standard operating flow system records this parameter combination as the optimal combination. Otherwise, the system will continue to adjust the pulse pressure and pulse time until a combination that meets the judgment criteria is found.

[0107] The ending judgment is as follows:

[0108]

[0109] It is determined that the pulse pressurization is completed.

[0110] In this embodiment, the control system flushes once for every three irrigations (which can be adjusted according to different drip irrigation systems). Automatically detect the completion status of the irrigation process. When the system detects that all drip tapes have stopped supplying water and the irrigation operation has been completed, the system enters the flushing mode. The control system stops the normal water supply flow by controlling the valves and the booster pump. Open the drain valve at the end of the drip irrigation system to prepare for flushing the drip tape. The control system starts the booster pump to remove residual impurities and blockages in the pipeline. During the flushing process, the flow at the end of the drip irrigation system is monitored in real time. According to the "Technical Specifications for Micro-irrigation Projects in the Yellow River Irrigation Area", the system flow rate must be ≥0.8m / s, and the flushing effect is determined by pressure changes. The flushing time is determined by the length of the pipeline. The specific formula is as follows:

[0111]

[0112] Among them, v1 represents the backwash flow rate, d represents the sediment particle size, ε represents the porosity, and the stable value is about 0.4, and h represents the water depth, which is set to 14 mm.

[0113] The expression of backwash time is as follows:

[0114]

[0115] Where t is the backwash time, L is the pipe length, and v is the system flow rate.

[0116] The conditions for judging the flushing effect of backwashing are as follows:

[0117]

[0118] Among them, β represents the flushing effect coefficient, P2 represents the system pressure after flushing, and P1 represents the system pressure before flushing. When the above conditions are met, it can be considered that the current flushing is effective. If the effect is not achieved, the water pump is pressurized, the speed v is increased, and the adjustment is made according to the flow sensor value:

[0119] Q=v·A

[0120] v i =v0+Δv

[0121] Among them, A represents the cross-sectional area of ​​the drip irrigation belt, Q represents the flushing flow rate, v0 is the initial flushing speed, which is generally set to 0.8 m / s, Δv is the pulse time gain value, which is set to 0.1 m / s, and vi Indicates the final flushing speed.

[0122] After flushing is completed, the control system turns off the pump and stops the water flow. The terminal drain valve is closed and the system returns to normal standby state to prepare for the next irrigation operation. The control system records the time, duration, flow rate and pressure data of each backwash operation.

[0123] In this embodiment, the dynamic adjustment is as follows:

[0124] When the system detects that the blockage problem is getting worse and the current combination of pressurization parameters cannot effectively clear the blockage, the system will automatically adjust according to the following formula until it finds a combination that can effectively solve the new round of blockage (P opt , T opt ):

[0125] P i+1 =P i +ΔP(P≤0.2MPa)

[0126] T i+1 =T i +ΔT(T≤9min)

[0127] n i+1 =n i +Δn(n≤7)

[0128] (P i+1 ,T i+1 ,n i+1 )=(P i +ΔP,T i +ΔT,n i +Δn)

[0129] Among them, ΔP is the gain value of the pressure test, which is set to a fixed value of 0.02MPa, ΔT is the set pulse time gain value in minutes, which is set to a fixed value of 2min, and Δn is the pulse number increment. i+1 is the current pulse pressure of the system, T i is the current pulse pressure time, n i+1 is the current pulse number.

[0130] The present invention realizes intelligent regulation of the drip irrigation system through processes such as data collection, preprocessing, model construction, evaluation optimization and real-time monitoring to ensure its efficient and stable operation.

Claims

1. A method for preventing the blockage of intelligent pressure regulating drippers for drip irrigation of the Yellow River, characterized in that: The following steps are involved: The Yellow River drip irrigation system uses flow sensors and pressure sensors to monitor the flow and pressure data during irrigation in real time. When the detected flow rate is lower than the set threshold, the dripper is blocked and the irrigation water is pulsed and pressurized. According to the blockage situation, the initial pulse pressure, pulse time and pulse number are intelligently and dynamically adjusted to obtain the optimal pulse pressurization combination; Based on the optimal pulse pressurization combination, pulse pressurization processing is performed, wherein after each pulse pressurization, the flow difference before and after the pulse pressurization is compared, and the effectiveness determination result is recorded; In response to the aggravation of the dripper blockage and the current pulse pressurization parameters cannot clear the blockage, the pressure increment and time increment are automatically increased, the pulse pressurization parameters are configured, and the pressure pump's boost amplitude, boost time and pulse number are adjusted through remote intelligent control to perform pressurization processing until the blockage is eliminated to prevent the dripper from being blocked; In response to the end of irrigation, the backwash function is automatically triggered to remove impurities using a flushing pump and electric valve; After the backwashing is completed, the normal standby state is restored and data recording is performed.

2. The anti-clogging method for intelligent pressure regulating dripper for Yellow River drip irrigation according to claim 1 is characterized in that: The judgment condition for judging whether the drip irrigation belt is blocked is: Among them, θ represents the degree of congestion, Q 实际 Indicates the actual operating flow, Q 标准 Indicates standard operating flow rate.

3. The anti-clogging method for intelligent pressure regulating dripper for Yellow River drip irrigation according to claim 1 is characterized in that: The expression of the optimal pulse compression combination is as follows: A=(P i ,T i ,n i ) P i =P0+ΔP(P≤0.02MPa) T i =T0+ΔT(T≤9min) n i =n0+Δn(n≤7) Among them, A represents the best combination of pulse pressure, P i represents the optimal pulse pressure, T i represents the optimal pulse time, n i Indicates the optimal number of pulses, P0 indicates the normal working pressure value, ΔP indicates the gain value of the pressurization test, P indicates the pressure of the pulse pressurization test, T0 indicates the initial setting in minutes, ΔT indicates the set pulse time gain value in minutes, T indicates the pulse time, n indicates the number of pulses, n0 indicates the initial number of pulses, and Δn indicates the number of times the set pulse number gain value is used.

4. The anti-clogging method for intelligent pressure regulating dripper for Yellow River drip irrigation according to claim 1 is characterized in that: The conditions for eliminating the blocking condition are as follows: Where d represents the difference value, Q 实际 Indicates the actual operating flow, Q 标准 Indicates standard operating flow rate.

5. The anti-clogging method for intelligent pressure regulating dripper for Yellow River drip irrigation according to claim 1 is characterized in that: The expression of the backwashing time is as follows: Where t represents the backwashing time, L represents the pipe length, and v represents the system flow rate; The expression of the backwash flow rate is as follows: Among them, v1 represents the backwash flow rate, d represents the sediment particle size, ε represents the porosity, and h represents the water depth; The conditions for determining the flushing effect of the backwashing are as follows: Among them, β represents the flushing effect coefficient, P2 represents the system pressure after flushing, and P1 represents the system pressure before flushing.

6. A Yellow River drip irrigation intelligent pressure regulating dripper anti-clogging system, applied to the Yellow River drip irrigation intelligent pressure regulating dripper anti-clogging method, characterized in that: include: The control system automatically identifies the optimal pulse pressurization combination and issues control instructions based on the data processed by the data processing system; A flow sensor is used to monitor the flow change of the anti-clogging system in real time. The flow sensor is installed on the main water supply pipes at all levels of the Yellow River drip irrigation system; A pressure sensor is used to monitor the pressure in the drip irrigation belt, and the pressure sensor is installed at the inlet of the drip irrigation belt; A data processing system, used to collect, store and analyze data from flow sensors and pressure sensors, store data from the anti-blocking system based on a data recording function, calculate operating parameters when a blockage occurs, and transmit the data to a control system, wherein the data processing system is integrated into the control system; A variable pressure pump, used to adjust the water supply pressure, the variable pressure pump is installed at the inlet of the main water supply pipeline; A filter system for filtering impurities in the irrigation water source, wherein the filter is installed on the main water supply pipeline; A backwashing system is used for flushing a drip irrigation belt in a backwashing mode by controlling an electric valve and using a flushing pump, wherein the backwashing process is automatically started in response to detecting a blockage at the end of the anti-blocking system or the end of irrigation.

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