A simulated rainfall control system and method for corona cage testing

Abstract

The present invention discloses a simulated rainfall control system and method for corona cage testing. The system comprises: a rainfall pump station group unit, a pressure delivery unit, a balancing valve group unit, a rainfall nozzle unit and a field control unit. The rainfall pump station group unit is used to output water of preset pressure to the pressure delivery unit; the pressure delivery unit is used to deliver the water of preset pressure to the rainfall nozzle unit according to a preset pipeline; the balancing valve group unit comprises a balancing valve group and a pressure sensor, and the balancing valve group unit is used to control the injection pressure of each group of nozzles according to the instructions of the field control unit; the rainfall nozzle unit is used to generate raindrops of preset specifications; the field control unit is used to set the parameters of the system and monitor and control the system; the system and method meet the conditions of heavy rain weather in an outdoor corona cage target area under any environment by artificially simulating rainfall.

Description

Technical Field

[0001] The present invention relates to the field of electric power technology, and more particularly to a simulated rainfall control system and method for corona cage testing. Background Art

[0002] The UHV corona cage is an important facility in the UHV DC test base. It mainly studies the corona characteristics of the split conductor to evaluate the electromagnetic environment. Weather conditions in the real environment are a major interference factor. For example, on rainy days, the dryness and wetness of the conductor and the amount of rainfall have a great influence on the corona loss of the conductor. However, the corona cage occupies a large area and must be placed outdoors for experiments. my country has a vast territory and the climate is also changeable. The weather conditions in different regions vary greatly throughout the year, so the rainfall is also very unevenly distributed. There is rainfall in the southern region most of the time, while the northwest and high-altitude areas are dry and rainless all year round. The appearance of rainy weather is also accompanied by great uncertainty, and the concentration of rain particles cannot be controlled. This has brought great obstacles to the study of the impact of heavy rain on the corona cage and the onset of corona. At present, it is mainly through artificial rainfall. Choosing the right time, using airplanes and rockets to spread dry ice, silver iodide, salt powder and other catalysts into the clouds to make the clouds precipitate. But doing this once is very costly and it is impossible to specifically control the amount of rainfall. Summary of the invention

[0003] The occurrence of natural rainfall weather has great uncertainty and the concentration of raindrops cannot be controlled. In order to solve the obstacles brought by natural rainfall weather to the study of corona initiation of conductors in a corona cage, the present invention provides a simulated rainfall control system and method for corona cage testing. The system and method meet the conditions for conducting rainfall weather research on outdoor corona cages in any environment through an artificial rainfall simulation method, and realize rainfall simulation with controllable rainfall. The simulated rainfall control system for corona cage testing includes:

[0004] A rainfall pump station group unit, the rainfall pump station group unit comprises a water tank and a booster water pump; the rainfall pump station group unit is used to increase the water pressure of the water stored in the water tank to a preset pressure through the booster water pump, and output the water of the preset pressure to the pressure delivery unit;

[0005] A pressure delivery unit, the pressure delivery unit comprises a plurality of rainfall pipelines pre-laid according to the on-site environment of the corona cage, one end of each of the plurality of rainfall pipelines receives the water of the preset pressure from the rainfall pump station group unit, and the other end is connected to a group of rainfall nozzles of the rainfall nozzle unit; the pressure delivery unit is used to deliver the water of the preset pressure to the rainfall nozzle unit according to the preset pipeline;

[0006] A balancing valve group unit, the balancing valve group unit includes a plurality of balancing valve groups and a plurality of pressure sensors, each balancing valve group corresponds to a pressure sensor; the balancing valve group is installed on the rainfall pipeline corresponding to each group of rainfall nozzles, and controls the spray pressure of each group of nozzles according to the instructions of the field control unit; the corresponding pressure sensor is used to collect pipeline pressure signals in real time, and send the pipeline pressure signals to the field control unit;

[0007] A rain nozzle unit, the rain nozzle unit comprising a plurality of rain nozzles, the rain nozzle unit being used to generate raindrops of preset specifications;

[0008] A field control unit, the field control unit includes a PC and a programmable controller; the field control unit is used to set the parameters of the system and monitor and control the system; the field control unit is used to send control instructions to the corresponding balancing valve group according to the pipeline pressure signal collected by the pressure sensor of the balancing valve group unit.

[0009] Further, the rainfall pump station group unit includes an adjustable frequency control module;

[0010] The adjustable frequency conversion control module is used to adjust the working frequency of the booster water pump according to the control instructions of the field control unit;

[0011] The adjustable frequency conversion control module includes a display screen and a control panel, wherein the display screen is used to display the working frequency of the booster water pump on site, and the control panel is used to receive manual adjustment instructions.

[0012] Furthermore, the booster water pump is a stainless steel multi-stage centrifugal pump;

[0013] The inner wall of the rainfall pipeline of the pressure delivery unit is made of PVC;

[0014] The rainfall nozzle is a solid square nozzle.

[0015] Further, the pressure delivery pipeline group unit includes an electric drain valve module;

[0016] The electric drain valve module is installed in the rainfall pipeline; the electric drain valve module is used to discharge the water in the rainfall pipeline after the test is completed according to the control instructions of the on-site control unit.

[0017] Further, the field control unit is used to send control instructions to the adjustable frequency control module of the rainfall pump station group unit according to the rainfall requirement of the test and the preset rules to adjust the working frequency of the booster pump;

[0018] The field control unit is used to send control instructions to the balancing valve group unit according to the rainfall distribution requirements of the test requirements and preset rules to adjust the injection pressure of each group of nozzles.

[0019] Further, when the spray pressure of the rainfall nozzles is at the same spray pressure in the pressure range of 3kgf to 5kgf, the effective coverage area of ​​the rainfall nozzles on the longitudinal elevation at a height of 0.5H meters is a square with a length and a width of x*H meters;

[0020] Among them, H is the height of the rainfall nozzle setting position from the ground, x is obtained according to the nozzle spray angle and the effective seedling shooting of the nozzle, 0<x<0.5H.

[0021] Furthermore, the number of a group of rainfall nozzles corresponding to each of the plurality of rainfall pipes is obtained by rounding up the quotient obtained by dividing the length of the rainfall pipe above the corona cage by the x*H meters;

[0022] The number of sprinkler heads required for the system is the cumulative value of the number of sprinkler heads in all rainfall pipelines.

[0023] Furthermore, the water spraying amount of the simulated rainfall is calculated by multiplying the water spraying coverage area by the preset rainfall amount;

[0024] The calculation formula of the water spray coverage area is: x*H*L;

[0025] Where L is the total length of all rainfall pipes in the area above the corona cage.

[0026] Furthermore, the system also includes a central management unit, which includes an industrial computer, a touch operation panel and a programmable controller;

[0027] The central management unit is used to remotely communicate with the on-site control unit. When the central management unit is in communication connection with the on-site control unit, the on-site control unit is controlled by the central management unit. The central management unit monitors and controls the system by controlling the on-site control unit.

[0028] When the communication between the central management unit and the field control unit is interrupted, the field control unit monitors and controls the system information on its own.

[0029] The method of applying the simulated rainfall control system as described above comprises:

[0030] Set the working frequency of the booster pump and the spray pressure of each group of rainfall nozzles according to the rainfall amount, rainfall distribution and preset rules required by the test;

[0031] Starting the rainfall pump station group unit, and delivering water at a preset pressure to the rainfall nozzle unit through the pressure delivery unit;

[0032] According to the feedback of the pressure sensor of the balancing valve group unit and the set injection pressure value, the corresponding balancing valve group is adjusted;

[0033] The rainfall simulation is achieved by the rainfall nozzle of the rainfall nozzle unit.

[0034] Furthermore, the water pressure is increased to a preset pressure value by a booster pump connected to the water tank;

[0035] Impurities in the water are filtered out through filters.

[0036] Furthermore, according to the control instruction of the on-site control unit, the water in the rainfall pipeline is discharged through the electric drain valve installed in the rainfall pipeline after the test is completed.

[0037] Further, remote communication is performed with the field control unit via a central management unit;

[0038] When the central management unit is in communication connection with the on-site control unit, the on-site control unit is controlled by the central management unit, and the central management unit monitors and controls the system by controlling the on-site control unit;

[0039] When the communication between the central management unit and the field control unit is interrupted, the field control unit monitors and controls the system information on its own.

[0040] The beneficial effects of the present invention are as follows: the technical solution of the present invention provides a simulated rainfall control system and method for corona cage testing. The system and method meet the conditions for conducting rainfall weather research on outdoor corona cages under any environment by artificially simulating rainfall. The system and method can reasonably simulate the natural rainfall process according to different requirements such as rainfall amount, raindrop density, rainfall distribution (uniformity), etc., stably act on the corona cage, and provide a controllable and monitorable simulated rainfall environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0042] Figure 1 It is a structural diagram of a simulated rainfall control system for corona cage testing according to a specific embodiment of the present invention;

[0043] Figure 2 It is a schematic diagram of a water tank in a specific embodiment of the present invention being connected to the booster water pump via a water pressure valve group;

[0044] Figure 3 It is a schematic diagram of the coverage area of ​​a rainfall sprinkler according to a specific embodiment of the present invention;

[0045] Figure 4 It is a flow chart of controlling the start of a water pump by a field control unit according to a specific embodiment of the present invention;

[0046] Figure 5 The present invention is a flowchart of a method for applying a simulated rainfall control system according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0047] Now, exemplary embodiments of the present invention are described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0048] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0049] Figure 1 FIG. 1 is a structural diagram of a simulated rainfall control system for corona cage testing according to a specific embodiment of the present invention; Figure 1 As shown, the system comprises:

[0050] A rain pump station unit 110, the rain pump station unit 110 comprising a water tank and a booster pump; the rain pump station unit 110 is used to increase the water pressure of the water stored in the water tank to a preset pressure through the booster pump, and output the water of the preset pressure to the pressure delivery unit;

[0051] The rainfall pump station group unit 110 includes an adjustable frequency control module and a water pump valve group;

[0052] In this embodiment, the water inlet and outlet of the booster water pump are both connected and fixed by a hydraulic valve group for controlling the operation of the water pump, and the water tank is connected to the booster water pump through the hydraulic valve group;

[0053] Specifically, Figure 2 As shown, Figure 2 It is a schematic diagram of the water tank being connected to the booster water pump via a water pressure valve group; 1, 2, 3, 4, and 5 in the figure are all water pump valve groups, and the water tank is connected to the booster water pump via a water pump valve group.

[0054] The adjustable frequency control module is connected to the booster water pump and is used to adjust the working frequency of the booster water pump according to the control instructions of the on-site control unit;

[0055] Furthermore, the adjustable frequency conversion control module includes a display screen and a control panel, the display screen is used to display the operating frequency of the booster water pump on site, and the control panel is used to receive manual adjustment instructions.

[0056] The water tank is used to store water supplied from the outside, and the water can be pure water to reduce impurities in the water and reduce the risk of clogging of rainfall pipes and rainfall nozzles; the outside of the water tank is connected to a vertically arranged connecting pipe, and the connecting pipe is provided with a scale; the water level in the water tank can be monitored in real time through the connecting pipe; the water tank water filling port is provided with a float valve, and the main water filling gate is usually in an open state. When the water tank is not full, water can be automatically stored. When the water level line is reached, the float valve floats up, and the plug on the other side of the connecting rod automatically blocks the water filling port to stop storing water.

[0057] Furthermore, the booster water pump is a stainless steel multi-stage centrifugal pump; compared with a single-stage pump, it has a higher head and reduces the noise of the unit. An exhaust hole is provided on the side of the water pump, which is usually screwed on and exhausted before activation to allow water to fill the pump chamber to prevent cavitation. In this way, a vacuum can be formed in the pump chamber during operation. A drainage hole is provided at the bottom of the water pump, which is closed at ordinary times and during use. When the water pump is not used in winter, the water in the pump is discharged to prevent the water pump from being damaged by freezing due to the low temperature in winter.

[0058] The pressure delivery unit 120 includes a plurality of rainfall pipelines pre-laid according to the on-site environment of the corona cage, one end of each of the plurality of rainfall pipelines receives the water of the preset pressure from the rainfall pump station group unit 110, and the other end is connected to a group of rainfall nozzles of the rainfall nozzle unit; the pressure delivery unit 120 is used to deliver the water of the preset pressure to the rainfall nozzle unit according to the preset pipeline;

[0059] Furthermore, in order to prevent rust, the inner wall of the rainfall pipeline of the pressure delivery unit 120 is made of PVC;

[0060] Further, the pressure delivery pipeline group unit includes an electric drain valve module;

[0061] The electric drain valve module is installed in the rainfall pipeline; the electric drain valve module is used to discharge the water in the rainfall pipeline after the test according to the control instructions of the on-site control unit to prevent the pipeline from being damaged by freezing due to low temperature in winter.

[0062] The balancing valve group unit 130 includes a plurality of balancing valve groups and a plurality of pressure sensors, each balancing valve group corresponds to a pressure sensor; the balancing valve group is installed on the rainfall pipeline corresponding to each group of rainfall nozzles, and controls the spray pressure of each group of nozzles according to the instructions of the field control unit; the corresponding pressure sensor is used to collect pipeline pressure signals in real time, and send the pipeline pressure signals to the field control unit;

[0063] By adjusting each balancing valve group, the rainfall distribution required by the test can be achieved, such as simulating local rainstorms, uniform rain, uneven rain, etc.; the pressure can also be adjusted, the size of raindrops can be adjusted, etc., to achieve the best possible simulation of the natural environment.

[0064] A rain nozzle unit 140, wherein the rain nozzle unit 140 includes a plurality of rain nozzles, and the rain nozzle unit 140 is used to generate raindrops of preset specifications;

[0065] The rain nozzle is a standard solid square nozzle; the rain spray angle can basically be guaranteed to be around 60° to 70° under the pressure condition of >1.5kgf;

[0066] In this embodiment, when the spray pressure of the rainfall nozzles is at the same spray pressure in the pressure range of 3kgf to 5kgf, the effective coverage area of ​​the rainfall nozzles on the longitudinal facade at a height of 0.5H meters is a square with a length and width of x*H meters; wherein H is the height of the rainfall nozzle setting position from the ground, and x is obtained based on the nozzle spray angle and the effective seedling shooting of the nozzle, 0<x<0.5H.

[0067] The number of a group of rainfall nozzles corresponding to each of the multiple rainfall pipes is obtained by rounding up the quotient obtained by dividing the length of the rainfall pipe above the corona cage by x*H meters; the number of nozzles required by the system is the cumulative value of the number of nozzles of all rainfall pipes.

[0068] The calculation method of the water spraying amount of the simulated rainfall is the product of the water spraying coverage area and the preset rainfall amount;

[0069] The calculation formula of the water spray coverage area is: x*H*L;

[0070] Where L is the total length of all rainfall pipes in the area above the corona cage.

[0071] Specifically, for example, the rainfall nozzle is set at a height of 10 meters from the ground. Figure 3As shown, at a spray angle of 60° and an effective seedling projection of 2000mm (2 meters), the width of the raindrop falling on 0.5H (5 meters, i.e., 5000mm) is about 2350, and x is about 0.235; in this case, the single rainfall sprinkler can ensure that the actual spray area at the experimental wire position point (i.e., 5-meter high plane) is 2.35 meters (length) * 2.35 meters (width);

[0072] Assuming that the length of each rainfall pipeline above the corona cage is 70m, the number of rainfall sprinklers on each rainfall pipeline is 70 / 2.35=29.8, rounded up to 30; assuming there are 6 such rainfall pipelines, a total of 180 sprinklers are required;

[0073] For the water spraying area, the total length of all rainfall pipes in the area above the corona cage is 6*70=420 meters; the coverage area is 420*0.235*10=987 square meters; by multiplying it with the preset rainfall of different rainfall amounts (heavy rain, moderate rain, light rain, etc.), the water spraying amount of simulated rainfall is obtained.

[0074] A field control unit 150, the field control unit 150 includes a PC and a programmable controller; the field control unit 150 is used to set the parameters of the system and monitor and control the system; the field control unit 150 is used to send control instructions to the corresponding balancing valve group according to the pipeline pressure signal collected by the pressure sensor of the balancing valve group unit 130.

[0075] Further, the field control unit 150 is used to send control instructions to the adjustable frequency control module of the rainfall pump station group unit 110 according to the rainfall requirement of the test and the preset rules to adjust the working frequency of the booster pump;

[0076] Furthermore, there may be multiple booster pumps, and the operating frequency of each pump may be individually controlled, such as Figure 4 As shown, the booster water pump includes pump No. 1, pump No. 2 and pump No. 3. After judging the value of the input rainfall, it is confirmed that a specific water pump is turned on. If pump No. 1 is turned on, the DO signal and frequency signal AO of pump No. 1 start are output, and the same is true for the other two water pumps; further, as Figure 2 The flow chart shown is cyclic. If multiple water pumps need to be turned on, after turning on pump No. 1, return to the startup stage for reconfirmation. During this process, the rainfall can be updated and any booster pump can be turned on or off.

[0077] The field control unit 150 is used to send control instructions to the balancing valve group unit 130 according to the rainfall distribution requirements of the test requirements and preset rules to adjust the injection pressure of each group of nozzles.

[0078] Furthermore, the system also includes a central management unit, which includes an industrial computer, a touch operation panel and a programmable controller;

[0079] The central management unit is used to remotely communicate with the field control unit 150. When the central management unit is in communication connection with the field control unit 150, the field control unit 150 is controlled by the central management unit. The central management unit monitors and controls the system by controlling the field control unit 150.

[0080] When the communication between the central management unit and the field control unit 150 is interrupted, the field control unit 150 monitors and controls the system information on its own.

[0081] In this embodiment, the programmable controller adopts an industrial-grade Siemens S7 series programmable controller (PLC). This product has extremely strong anti-interference performance and is programmed to make separate requirements for rainfall according to rainy day simulation conditions (light rain, moderate rain, heavy rain), and adopts a TP27 color touch screen as an operation panel, completely replacing conventional switch buttons, indicator lights and other devices, making the control cabinet surface neater.

[0082] Figure 5 FIG. 1 is a flow chart of a method for applying a simulated rainfall control system according to a specific embodiment of the present invention. Figure 5 As shown, the method includes:

[0083] Step 510, setting the working frequency of the booster pump and the spray pressure of each group of rainfall nozzles according to the rainfall amount and rainfall distribution required by the test and the preset rules;

[0084] Step 520, start the rainfall pump station group unit, and deliver water at a preset pressure to the rainfall nozzle unit through the pressure delivery unit;

[0085] Step 530, adjusting the corresponding balancing valve group according to the feedback of the pressure sensor of the balancing valve group unit and the set injection pressure value;

[0086] Step 540, simulating rainfall through the rainfall nozzle of the rainfall nozzle unit.

[0087] Furthermore, the water pressure is increased to a preset pressure value by a booster pump connected to the water tank;

[0088] Impurities in the water are filtered out through filters.

[0089] Furthermore, according to the control instruction of the on-site control unit, the water in the rainfall pipeline is discharged through the electric drain valve installed in the rainfall pipeline after the test is completed.

[0090] Further, remote communication is performed with the field control unit via a central management unit;

[0091] When the central management unit is in communication connection with the on-site control unit, the on-site control unit is controlled by the central management unit, and the central management unit monitors and controls the system by controlling the on-site control unit;

[0092] When the communication between the central management unit and the field control unit is interrupted, the field control unit monitors and controls the system information on its own.

[0093] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present disclosure can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0094] Those skilled in the art will appreciate that the modules in the devices in the embodiments can be adaptively changed and set in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and in addition they can be divided into multiple submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner can be combined in any combination. Unless otherwise explicitly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) can be replaced by an alternative feature that provides the same, equivalent or similar purpose. The step numbers involved in this specification are only used to distinguish the steps, and are not used to limit the time or logical relationship between the steps. Unless there is a clear definition in the text, the relationship between the steps includes various possible situations.

[0095] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present disclosure and form different embodiments. For example, any one of the embodiments claimed in the claims can be used in any combination.

[0096] The various component embodiments of the present disclosure can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. The present disclosure can also be implemented as a device or system program (e.g., computer program and computer program product) for performing a part or all of the methods described herein. Such a program implementing the present disclosure can be stored on a computer-readable medium, or can have the form of one or more signals. Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0097] It should be noted that the above embodiments illustrate rather than limit the present disclosure, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present disclosure may be implemented by means of hardware comprising a number of different elements and by means of a suitably programmed computer. In a unit claim enumerating a number of systems, several of these systems may be embodied by the same item of hardware.

[0098] The above description is only a specific implementation mode of the present disclosure. It should be pointed out that, for ordinary technicians in this field, several improvements, modifications, and deformations can be made without departing from the spirit of the present disclosure. These improvements, modifications, and deformations should be deemed to fall within the scope of protection of this application.

Claims

1. A simulated rainfall control system for corona cage testing, the system comprising: A rainfall pump station group unit, the rainfall pump station group unit comprises a water tank and a booster water pump; the rainfall pump station group unit is used to increase the water pressure of the water stored in the water tank to a preset pressure through the booster water pump, and output the water of the preset pressure to the pressure delivery unit; A pressure delivery unit, the pressure delivery unit comprises a plurality of rainfall pipelines pre-laid according to the on-site environment of the corona cage, one end of each of the plurality of rainfall pipelines receives the water of the preset pressure from the rainfall pump station group unit, and the other end is connected to a group of rainfall nozzles of the rainfall nozzle unit; the pressure delivery unit is used to deliver the water of the preset pressure to the rainfall nozzle unit according to the preset pipeline; A balancing valve group unit, the balancing valve group unit includes a plurality of balancing valve groups and a plurality of pressure sensors, each balancing valve group corresponds to a pressure sensor; the balancing valve group is installed on the rainfall pipeline corresponding to each group of rainfall nozzles, and controls the spray pressure of each group of nozzles according to the instructions of the field control unit; the corresponding pressure sensor is used to collect pipeline pressure signals in real time, and send the pipeline pressure signals to the field control unit; A rain nozzle unit, the rain nozzle unit comprising a plurality of rain nozzles, the rain nozzle unit being used to generate raindrops of preset specifications; A field control unit, the field control unit comprising a PC and a programmable controller; The field control unit is used to set the parameters of the system and monitor and control the system; the field control unit is used to send control instructions to the corresponding balancing valve group according to the pipeline pressure signal collected by the pressure sensor of the balancing valve group unit.

2. The system according to claim 1, characterized in that: The rainfall pump station group unit includes an adjustable frequency conversion control module; The adjustable frequency conversion control module is used to adjust the working frequency of the booster water pump according to the control instructions of the field control unit; The adjustable frequency conversion control module includes a display screen and a control panel, wherein the display screen is used to display the working frequency of the booster water pump on site, and the control panel is used to receive manual adjustment instructions.

3. The system according to claim 1, characterized in that: The booster water pump is a stainless steel multi-stage centrifugal pump; The inner wall of the rainfall pipeline of the pressure delivery unit is made of PVC; The rainfall nozzle is a solid square nozzle.

4. The system according to claim 1, characterized in that: The pressure delivery pipeline group unit includes an electric drain valve module; The electric drain valve module is installed in the rainfall pipeline; the electric drain valve module is used to discharge the water in the rainfall pipeline after the test is completed according to the control instructions of the on-site control unit.

5. The system according to claim 2, characterized in that: The field control unit is used to send control instructions to the adjustable frequency control module of the rainfall pump station group unit according to the rainfall requirement of the test and the preset rules to adjust the working frequency of the booster water pump; The field control unit is used to send control instructions to the balancing valve group unit according to the rainfall distribution requirements of the test requirements and preset rules to adjust the injection pressure of each group of nozzles.

6. The system according to claim 5, characterized in that: When the spray pressure of the rainfall nozzles is at the same spray pressure in the pressure range of 3kgf to 5kgf, the effective coverage area of ​​the rainfall nozzles on the longitudinal elevation at a height of 0.5H meters is a square with a length and a width of x*H meters; Among them, H is the height of the rainfall nozzle setting position from the ground, x is obtained according to the nozzle spray angle and the effective seedling shooting of the nozzle, 0<x<0.5H.

7. The system according to claim 6, characterized in that: The number of a group of rainfall nozzles corresponding to each of the plurality of rainfall pipes is obtained by rounding up the quotient obtained by dividing the length of the rainfall pipe above the corona cage by the x*H meters; The number of sprinkler heads required for the system is the cumulative value of the number of sprinkler heads in all rainfall pipelines.

8. The system according to claim 6, characterized in that: The calculation method of the water spraying amount of the simulated rainfall is the product of the water spraying coverage area and the preset rainfall amount; The calculation formula of the water spray coverage area is: x*H*L; Where L is the total length of all rainfall pipes in the area above the corona cage.

9. The system according to claim 1, characterized in that: The system further comprises a central management unit, which comprises an industrial computer, a touch operation panel and a programmable controller; The central management unit is used to communicate with the on-site control unit remotely. When the central management unit is in communication connection with the on-site control unit, the on-site control unit is controlled by the central management unit. The central management unit monitors and controls the system by controlling the on-site control unit. When the communication between the central management unit and the field control unit is interrupted, the field control unit monitors and controls the system information on its own.

10. A method for applying the simulated rainfall control system according to claim 1, characterized in that: Set the working frequency of the booster pump and the spray pressure of each group of rainfall nozzles according to the rainfall amount, rainfall distribution and preset rules required by the test; Starting the rainfall pump station group unit, and delivering water at a preset pressure to the rainfall nozzle unit through the pressure delivery unit; According to the feedback of the pressure sensor of the balancing valve group unit and the set injection pressure value, the corresponding balancing valve group is adjusted; The rainfall simulation is achieved by the rainfall nozzle of the rainfall nozzle unit.

11. The method according to claim 10, characterized in that: The water pressure is increased to a preset pressure value by a booster pump connected to the water tank; Impurities in the water are filtered out through filters.

12. The method according to claim 10, characterized in that: According to the control instruction of the on-site control unit, the water in the rainfall pipeline is discharged through the electric drain valve installed in the rainfall pipeline after the test is completed.

13. The method according to claim 10, characterized in that: remotely communicate with the field control unit via a central management unit; When the central management unit is in communication connection with the on-site control unit, the on-site control unit is controlled by the central management unit, and the central management unit monitors and controls the system by controlling the on-site control unit; When the communication between the central management unit and the field control unit is interrupted, the field control unit monitors and controls the system information on its own.

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