A sprinkler head for irrigation and its spraying method

Abstract

This invention discloses an irrigation sprinkler head and its spraying method, comprising a rocker arm sprinkler head, a nozzle, a water-blocking pressure plate, a drive assembly, a mounting cylinder, and a rotating water pipe. One end of the rotating water pipe is connected to the rocker arm sprinkler head, and the other end is rotatably connected to the outlet pipe of a water pump. The rotating water pipe is rotatably connected to the mounting cylinder via the drive assembly, and the rotating water pipe and the mounting cylinder are coaxially arranged. The drive assembly is located between the mounting cylinder and the rotating water pipe. The nozzle is mounted on the rocker arm sprinkler head, and the water-blocking pressure plate is rotatably connected to the side of the rocker arm sprinkler head. During operation, the mounting cylinder is fixed to the soil, and the drive assembly drives the rotating water pipe to rotate relative to the mounting cylinder. The water-blocking pressure plate is used to control the direction and magnitude of the water flow at the nozzle. This invention belongs to the field of irrigation device technology. By controlling and adjusting the pitch angle of the water-blocking pressure plate in real time, this invention implements sprinkler irrigation in irregularly shaped areas, achieving comprehensive spraying of irregularly shaped areas, and has good effects on water and energy saving and precise irrigation.

Description

Technical Field

[0001] This invention relates to the field of irrigation equipment technology, specifically to an irrigation nozzle and a spraying method using the irrigation nozzle. Background Technology

[0002] Currently, water-saving, energy-saving, and landscaping-oriented sprinkler irrigation in green spaces has become a trend. On the one hand, if the water volume cannot be sprinkled as needed, either flooding or drought will affect the growth of vegetation and crops, and will also waste water resources. On the other hand, when people stop to admire the scenery, they are easily splashed with water, affecting their viewing experience and road traffic. The high requirements for energy and water conservation in green spaces, irregular sprinkler irrigation areas, and landscaping cannot be met by existing sprinkler irrigation systems. Summary of the Invention

[0003] Therefore, the present invention provides an irrigation sprinkler head to solve the above-mentioned problems in the prior art. To achieve the above objective, the present invention provides the following technical solution:

[0004] According to a first aspect of the present invention, an irrigation sprinkler head includes a rocker arm sprinkler head, a nozzle, a water-blocking pressure plate, a drive assembly, a mounting cylinder, and a rotating water pipe. One end of the rotating water pipe is connected to the rocker arm sprinkler head, and the other end of the rotating water pipe is rotatably connected to the outlet pipe of a water pump. The rotating water pipe is rotatably connected to the mounting cylinder via the drive assembly. The rotating water pipe and the mounting cylinder are coaxially arranged. The drive assembly is located between the mounting cylinder and the rotating water pipe. The nozzle is mounted on the rocker arm sprinkler head, and the water-blocking pressure plate is rotatably connected to the side of the rocker arm sprinkler head. During operation, the mounting cylinder is fixed to the soil, the drive assembly drives the rotating water pipe to rotate relative to the mounting cylinder, and the water-blocking pressure plate is used to control the direction of water flow at the nozzle.

[0005] Furthermore, it also includes an ultrasonic sensor and a servo motor. The ultrasonic sensor is located on the side of the rocker-arm nozzle, the servo motor is mounted on the side of the rocker-arm nozzle, and the water-blocking pressure plate is mounted on the output shaft of the servo motor.

[0006] Furthermore, it also includes a servo motor bracket and an ultrasonic sensor bracket. The servo motor is mounted on the rocker-arm nozzle via the servo motor bracket, and the ultrasonic sensor is mounted on the rocker-arm nozzle via the ultrasonic sensor bracket.

[0007] Furthermore, it also includes a soil moisture sensor and a temperature and humidity sensor. The soil moisture sensor is mounted on the mounting cylinder, and the temperature and humidity sensor is mounted on the servo bracket.

[0008] Furthermore, the water-blocking plate includes a water-blocking plate and a rotating rod. One end of the rotating rod is connected to the output shaft of the servo motor, and the other end of the rotating rod is provided with a water-blocking plate. The angle between the water-blocking plate and the central axis of the nozzle is between 90 degrees and 180 degrees.

[0009] Furthermore, it also includes a first plate, a second plate, and a third plate. The first plate is located in the middle of the mounting cylinder, the second plate is installed at one end of the mounting cylinder, and the third plate is installed at the other end of the mounting cylinder. The first plate, the second plate, and the third plate are all sleeved on the rotating water pipe. The rotating water pipe can rotate relative to the first plate, the second plate, and the third plate.

[0010] Furthermore, the drive assembly includes a stepper motor and a drive wheel. The stepper motor is mounted on the first plate, and the drive wheel is mounted on the output shaft of the stepper motor. The inner wall of the mounting cylinder and the outer wall of the rotating water pipe are both tangent to the side of the drive wheel.

[0011] Furthermore, it also includes a controller, which is mounted on the second board. The servo motor, stepper motor, soil moisture sensor, temperature and humidity sensor, and ultrasonic sensor are all electrically connected to the controller.

[0012] Furthermore, the angle between the central axis of the ultrasonic sensor and the central axis of the nozzle is between 30 and 150 degrees.

[0013] The present invention has the following advantages: The first aspect of the present invention provides an irrigation sprinkler head that adjusts the pitch angle of the water-blocking pressure plate in real time to implement sprinkler irrigation in irregular areas, achieving full spraying of irregular areas, which has a good effect on water saving, energy saving and precise irrigation.

[0014] According to a second aspect of the present invention, a spraying method for an irrigation sprinkler head, using all the technical features of an irrigation sprinkler head according to the first aspect of the present invention, further includes the following steps:

[0015] Step S100: Detect soil moisture using a soil moisture sensor, and detect air temperature and humidity using a temperature and humidity sensor, and feed back the soil moisture and air temperature and humidity to the controller.

[0016] Step S200: The speed of the stepper motor is controlled by the controller to set the rotation speed of the nozzle;

[0017] Step S300: Ultrasonic ranging is performed by an ultrasonic sensor and fed back to the controller. The controller calculates the pitch angle of the water-blocking pressure plate based on the distance.

[0018] Step S400: The controller controls the servo motor to rotate to the specified pitch angle, and the nozzle sprays normally;

[0019] Step S500: Spraying complete.

[0020] The second aspect of this invention provides a method for spraying irrigation nozzles with the following advantages: a temperature and humidity sensor transmits collected soil data to a controller; an ultrasonic sensor collects data for irregularly shaped irrigation areas and transmits the collected data to the controller; the controller, based on the data from the temperature and humidity sensor and the ultrasonic sensor, controls the nozzles and water-blocking plates via a servo motor, achieving intelligent irrigation. Furthermore, this invention has a compact structure, simple design, and is easy to use, making it highly valuable for widespread application. It allows for truly on-demand irrigation coverage, freeing people from the embarrassment and inconvenience of being sprayed by rotating sprinklers while enjoying the landscape, thus saving water resources and optimizing existing landscape irrigation systems. It enhances the quality of green spaces and brings certain environmental and ecological benefits. Attached Figure Description

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0023] Figure 1 This is a schematic diagram of the structure of an irrigation nozzle provided in some embodiments of the present invention.

[0024] Figure 2 This is a first perspective view of an irrigation nozzle provided for some embodiments of the present invention.

[0025] Figure 3 This is a second perspective view of an irrigation nozzle provided for some embodiments of the present invention.

[0026] Figure 4 This is a third perspective view of an irrigation nozzle provided for some embodiments of the present invention.

[0027] Figure 5 The fourth perspective view of an irrigation nozzle provided for some embodiments of the present invention.

[0028] Figure 6This is a structural diagram of a drive assembly for an irrigation nozzle provided in some embodiments of the present invention.

[0029] Figure 7 This is a structural diagram of a rocker arm type sprinkler head for irrigation, provided for some embodiments of the present invention.

[0030] Figure 8 This is a partial view of the structure of a rocker arm type sprinkler for irrigation provided in some embodiments of the present invention.

[0031] Figure 9 This is a structural diagram of a servo bracket for an irrigation nozzle provided in some embodiments of the present invention.

[0032] Figure 10 This is a flowchart illustrating a spraying method using an irrigation nozzle, as provided in some embodiments of the present invention.

[0033] Figure 11 The graph shows the relationship between the spray radius of an irrigation nozzle and the pitch angle of the water-blocking plate in a spraying method provided in some embodiments of the present invention.

[0034] Figure 12 This is a schematic diagram of the spraying area in an irrigation nozzle spraying method provided in some embodiments of the present invention.

[0035] In the diagram: 1. Main controller, 2. Wireless transmission module, 3. Stepper motor driver, 5. Power supply unit, 6. Servo motor, 8. Ultrasonic sensor, 9. Temperature and humidity sensor, 10. Mounting cylinder, 11. Servo motor bracket, 111. First plate, 112. Second plate, 113. Connector, 12. Rotating water pipe, 13. Rocker-arm nozzle, 14. Ultrasonic sensor bracket, 15. Water-blocking plate, 151. Rotating rod, 152. Water-blocking plate, 16. Nozzle, 17. Soil moisture sensor, 18. Drive wheel, 19. First plate, 20. Second plate, 21. Third plate, 22. Stepper motor. Detailed Implementation

[0036] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] like Figures 1 to 8As shown, an irrigation sprinkler head according to a first aspect embodiment of the present invention includes a rocker arm sprinkler head 13, a nozzle 16, a water-blocking pressure plate 15, a drive assembly, a mounting cylinder 10, and a rotating water pipe 12. One end of the rotating water pipe 12 is connected to the rocker arm sprinkler head 13, and the other end of the rotating water pipe 12 is rotatably connected to the outlet pipe of a water pump. The rotating water pipe 12 is rotatably connected to the mounting cylinder 10 through the drive assembly. The rotating water pipe 12 and the mounting cylinder 10 are coaxially arranged. The drive assembly is located between the mounting cylinder 10 and the rotating water pipe 12. The nozzle 16 is mounted on the rocker arm sprinkler head 13. The water-blocking pressure plate 15 is rotatably connected to the side of the rocker arm sprinkler head 13. During operation, the mounting cylinder 10 is fixed to the soil, and the drive assembly drives the rotating water pipe 12 to rotate relative to the mounting cylinder 10. The water-blocking pressure plate 15 is used to control the direction and magnitude of the water flow at the nozzle 16.

[0038] In the above embodiments, it should be noted that the rocker arm nozzle 13 and the rotating water pipe 12 are connected by threaded connection or welding, and the rotating water pipe 12 is connected to the water outlet pipe of the water pump through a bearing. The end of the rotating pipe 12 away from the rocker arm nozzle 13 is located inside the mounting cylinder 10, and the water outlet pipe of the water pump passes through the mounting cylinder 10 and is rotatably connected to the rotating water pipe. The area of ​​the water baffle plate 15 is larger than the cross-sectional area of ​​the water column sprayed by the rocker arm nozzle 13.

[0039] The working principle of the water-retaining pressure plate 15 in controlling the water flow direction is as follows: When the water jet is sprayed from the rocker-arm nozzle 13 and directly sprays onto the water-retaining pressure plate 15, the water jet is refracted back to the ground through the water-retaining pressure plate 15. Based on the formula relationship between the spraying distance and the pitch angle, the servo motor 6 controls the water-retaining pressure plate 15 to change its pitch angle, thereby changing the spraying distance after the water jet hits the water-retaining pressure plate 15 and is refracted.

[0040] The technical effect achieved by the above embodiment is that by controlling and adjusting the pitch angle of the water-blocking pressure plate 15 in real time, sprinkler irrigation of irregular areas can be implemented to achieve full spraying of irregular areas, which has a good effect on water saving, energy saving and precision irrigation.

[0041] Optional, such as Figures 1 to 8 As shown, in some embodiments, it also includes an ultrasonic sensor 8, a servo motor 6, a servo motor bracket 11, and an ultrasonic sensor bracket 14. The ultrasonic sensor 8 is disposed on the side of the rocker-arm nozzle 13, the servo motor 6 is mounted on the side of the rocker-arm nozzle 13, the water-blocking pressure plate 15 is mounted on the output shaft of the servo motor 6, the servo motor 6 is mounted on the rocker-arm nozzle 13 through the servo motor bracket 11, and the ultrasonic sensor 8 is mounted on the rocker-arm nozzle 13 through the ultrasonic sensor bracket 14.

[0042] In the above optional embodiments, it should be noted that the ultrasonic sensor bracket 14 is mounted on the rocker-arm nozzle 13 by bolt connection, and the ultrasonic sensor 8 is mounted on the ultrasonic sensor bracket 14 by bolt connection or snap-fit ​​connection; the servo motor bracket 11 is mounted on the rocker-arm nozzle 13 by bolt connection or snap-fit ​​connection, and the servo motor 6 is mounted on the servo motor bracket 11 by bolt connection or snap-fit ​​connection; as Figure 9 As shown, the servo bracket 11 includes a first plate 111, a second plate 112 and a connector 113. The servo 6 is mounted on the first plate 111, the output shaft of the servo 6 passes through the second plate 112, the connector 113 is mounted on the rocker-arm type nozzle 13, and the second plate 112 is disposed between the first plate 111 and the connector 113.

[0043] The advantages of the above optional embodiments are: by setting the ultrasonic sensor 8, the range of irregular sprinkler irrigation can be collected, thereby achieving precise irrigation of the irregular sprinkler irrigation range.

[0044] Optional, such as Figures 1 to 8 As shown, in some embodiments, a soil moisture sensor 17 and a temperature and humidity sensor 9 are also included. The soil moisture sensor 17 is mounted on the mounting cylinder 10, and the temperature and humidity sensor 9 is mounted on the servo bracket 11. Specifically, a first plate 19, a second plate 20, and a third plate 21 are also included. The first plate 19 is located in the middle of the mounting cylinder 10, the second plate 20 is mounted at one end of the mounting cylinder 10, and the third plate 21 is mounted at the other end of the mounting cylinder 10. The first plate 19, the second plate 20, and the third plate 21 are all sleeved on the rotating water pipe 12. The rotating water pipe 12 is rotatable relative to the first plate 19, the second plate 20, and the third plate 21. The soil moisture sensor 17 and the temperature and humidity sensor 9 are mounted on the third plate 21 by bolt connection.

[0045] In the above optional embodiments, it should be noted that the temperature and humidity sensor 9 is installed on the side of the second plate 112.

[0046] The advantages of the above optional embodiments are as follows: by setting the temperature sensor 9 and the soil moisture sensor 17, the nozzle can set the nozzle rotation speed according to the soil moisture. If the moisture is too low, the speed of the rocker-arm nozzle 13 will be slowed down for irrigation.

[0047] Optional, such as Figures 1 to 8 As shown, in some embodiments, the water-blocking plate 15 includes a water-blocking plate 152 and a rotating rod 151. One end of the rotating rod 151 is connected to the output shaft of the servo motor 6, and the other end of the rotating rod 151 is provided with a water-blocking plate 152. The angle between the water-blocking plate 152 and the central axis of the nozzle 16 is between 90 degrees and 180 degrees.

[0048] In the above optional embodiments, it should be noted that the angle between the water baffle 152 and the rotating rod 151 is an obtuse angle, the water baffle 152 and the rotating rod 151 are integrally formed, and the water baffle 152 is connected to the output shaft of the servo motor 6 by means of snap-fit ​​or bolt connection.

[0049] The advantages of the above optional embodiments are that the position of the water flow can be guaranteed by setting the angle between the water baffle 152 and the central axis of the nozzle 16.

[0050] Optional, such as Figures 1 to 8 As shown, in some embodiments, the drive assembly includes a stepper motor 22 and a drive wheel 18. The stepper motor 22 is mounted on the first plate 19, and the drive wheel 18 is mounted on the output shaft of the stepper motor 22. The inner wall of the mounting cylinder 10 and the outer wall of the rotating water pipe 12 are both tangent to the side of the drive wheel 18.

[0051] In the above optional embodiments, it should be noted that the number of stepper motors 22 and the number of drive wheels 18 are both at least three. The drive wheels 18 are installed one-to-one on the output shaft of the stepper motor 22. The stepper motor 22 is connected to the first plate 19 by bolts. The drive wheels 18 are connected to the output shaft of the stepper motor 22 by bolts or snap-fit. The drive wheels 18 and the stepper motor 22 are arranged in a circumferential array on the circumference of the rotating water pipe 12. The outer circumference of the drive wheel 18 is provided with rubber or the drive wheel 18 is made of rubber material.

[0052] The beneficial effects of the above optional embodiments are as follows: the stepper motor 22 drives the drive wheel 18 to rotate, and the friction between the drive wheel 18 and the rotating water pipe 12 and the mounting cylinder 10 ensures that the rotating water pipe 12 rotates reliably relative to the mounting cylinder 10, thus guaranteeing the rotation of the rocker arm nozzle 13.

[0053] Optional, such as Figures 1 to 8 As shown, in some embodiments, a controller is also included, which is mounted on the second board 20. The servo motor 6, stepper motor 22, soil moisture sensor 17, temperature and humidity sensor 9 and ultrasonic sensor 8 are all electrically connected to the controller.

[0054] In the above optional embodiments, it should be noted that the system also includes a battery, a power supply, and a wireless transmission module 2, etc. The battery, power supply, and wireless transmission module 2 are all electrically connected to the controller, and the battery can be a solar rechargeable battery.

[0055] The advantages of the above optional embodiments are: by setting the soil moisture sensor 17 and the temperature and humidity sensor 9 with the controller, different amounts of water can be sprayed onto soils with different moisture levels, thus ensuring irrigation uniformity.

[0056] Optional, such as Figures 1 to 8 As shown, in some embodiments, the angle between the central axis of the ultrasonic sensor 8 and the central axis of the nozzle 16 is between 30 degrees and 150 degrees.

[0057] The present invention provides a rocker arm type sprinkler for irrigation, which is equipped with a controller, sensor and other devices to control the water-blocking pressure plate 15 to achieve irrigation of irregular areas.

[0058] The system can be divided into hardware, software, cloud platform, visual interface, and WeChat mini-program; it should be noted that the cloud platform can be Baidu Cloud Platform, Huawei Cloud Platform, or other private cloud platforms, etc.

[0059] The hardware primarily uses a Node MCU as the main controller, connected to external actuators including a temperature and humidity sensor (9), an ultrasonic ranging sensor (8), a soil moisture sensor (17), a stepper motor (22), and a servo motor (6). The core motherboard's processor module is a programmable Wi-Fi module based on the ESP8266, possessing programming capabilities and Wi-Fi networking functionality, offering excellent expandability.

[0060] The irrigation nozzle of the present invention can also achieve the following functions through the above structure:

[0061] The irrigation time is set and the water volume is fine-tuned by monitoring real-time temperature, humidity, weather and soil information (for example, 10 minutes of irrigation in the morning and 10 minutes in the afternoon in summer, and 5 minutes of irrigation at noon in winter).

[0062] A temperature and humidity sensor 9 and a soil moisture sensor 17 were added to the sprinkler head, which can set the sprinkler head rotation speed according to the soil moisture. If the moisture is too low, the speed of the stepper motor 22 will be slowed down for irrigation.

[0063] Depending on the location of the sprinkler heads, the sprinkler heads at the edge of the road change their pitch angle according to ultrasonic ranging, thereby reducing the irrigation range and ensuring that all the water is sprayed into the green area.

[0064] We monitor the information and working status of our devices, including the working status of sensors and other components, and the data collected through the Alibaba Cloud platform.

[0065] The switch can be controlled via a WeChat mini program, which displays real-time data such as temperature and humidity at the location of the nozzle and soil moisture.

[0066] You can see the geographical location of our equipment, as well as its working status, working environment, and working data through the web interface.

[0067] Because the temperature and humidity sensor 9 and soil moisture sensor 17 measure different environments, a single controller is prone to wiring problems. Therefore, to facilitate future expansion and prevent excessive load, multiple controllers are used for angle control. Data is transmitted between them via Wi-Fi. Specifically, the soil moisture sensor 17 is connected to the main controller for signal acquisition, while the temperature and humidity sensor 9 and the ultrasonic sensor are connected to the first slave controller. In the system execution section, two of the three stepper motors 22 controlling the horizontal rotation of the nozzle are connected to the first slave controller, while the servo motor 6 controlling the nozzle's pitch angle is connected to the second slave controller. The third stepper motor 22 assisting in the horizontal rotation of the nozzle is also connected to the second slave controller.

[0068] A spraying method for an irrigation sprinkler head according to a second aspect embodiment of the present invention, such as... Figure 9 As shown, an irrigation sprinkler head using all the technical features of the first aspect of the present invention, in addition to the following steps:

[0069] Step S100: Detect soil moisture using soil moisture sensor 17, and detect air temperature and humidity using temperature and humidity sensor 9, and feed back soil moisture and air temperature and humidity to the controller.

[0070] Step S200: The speed of the stepper motor 22 is controlled by the controller to set the rotation speed of the nozzle;

[0071] Step S300: Ultrasonic ranging is performed by ultrasonic sensor 8 and fed back to controller. The controller calculates the pitch angle of water-blocking pressure plate 15 based on the distance.

[0072] Step S400: The controller controls the servo motor 6 to rotate to the specified pitch angle, and the nozzle sprays normally.

[0073] Step S500: Spraying complete.

[0074] The experimental principle of a spraying method using an irrigation sprinkler head is as follows:

[0075] Assuming the horizontal distance between the road and the sprinkler head location and the sprinkler head setting are fixed, the irrigation distance can vary into different parabolic shapes. To control the irrigation distance, the sprinkler head pressure must be controllable, requiring hardware modifications to the sprinkler head.

[0076] During the test, the system can automatically adjust based on factors such as water pressure and flow rate, so real-time water pressure and flow rate can be ignored. To simplify the test, a flat site with a slope of less than 1% was selected, and since the principle of spraying in each direction of 360 degrees is the same, a 180-degree transverse spray was used for the test to implement the variable domain.

[0077] like Figure 12As shown, with nozzle position O as the origin, the program is designed with the initial rightward horizontal angle as 0 degrees. Let the nozzle rotation angle be α degrees. When α reaches ∠BOC, based on the relationship between the pitch angle and radius, the pitch angle is changed, causing the radius to dynamically decrease and increase until the horizontal rotation reaches ∠BOE, at which point the pitch angle returns to 0 degrees, and rotation continues at the maximum radius. The required pitch angle is obtained by detecting the transmission distance using ultrasonic waves.

[0078] Considering that the parabola changes shape according to the pitch angle and the formula is relatively complex, and the accuracy required for this distance is not high in practical engineering applications, an experimental method is used to find the relationship between the pitch angle and the sprinkler distance.

[0079] The core of the experimental strategy's theoretical calculations lies in solving the fitting polynomial between the irrigation distance and the pitch angle. Testing begins at the tablet level, determining the spraying distance corresponding to different pitch angles. Multiple sets of data are measured using repeatable experiments. The fitting polynomial between the irrigation distance and the pitch angle is then solved. The specific theoretical calculations are as follows:

[0080] (1) Calculate the distance from the actual road to the sprinkler head, and let its value be y. According to the triangle side angle formula, the following calculation formula is given.

[0081]

[0082] (2) Repeated experiments were conducted to determine the relationship between sprinkler distance and pitch angle.

[0083] Based on repeatable experiments, experimental data on the relationship between the pitch angle and the sprinkler distance were obtained, and a test curve was plotted, such as... Figure 11 .

[0084] according to Figure 11 Mid-curve analysis and fitting formula.

[0085] Analysis shows that the curve conforms to a polynomial trend line. The coefficient of determination is 0.922 for order 2, 0.9732 for order 3, 0.9856 for order 4, and 0.9916 for order 5. Considering the minimal impact of actual field errors and the ability to correct them on-site, a polynomial with order 4 and a coefficient of determination of 0.9856 is chosen as the design basis, which is sufficient to meet production accuracy requirements. The fitted polynomial is thus derived as follows:

[0086] y = 0.0006α 4 -0.0631α 3 -2.2375α 2 -17.027α+382.72 (Equation 2)

[0087] In the formula, the pitch angle is α, and the irrigation distance is y centimeters. According to Formula 2, the pitch angle required for different irrigation radii of 15 can be obtained.

[0088] The final test results are shown in Table 1:

[0089] Table 1 Relationship between nozzle pitch angle and radius

[0090]

[0091] Because the pump pressure used in the laboratory is relatively low, the irrigation radius is relatively short. If the water pressure is changed to that of a real garden irrigation system, theoretical analysis shows that it can meet the required distance.

[0092] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0093] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

Claims

1. A sprinkler head for irrigation, characterized in that, The device includes a rocker arm nozzle (13), a nozzle (16), a water-blocking pressure plate (15), a drive assembly, a mounting cylinder (10), and a rotating water pipe (12). One end of the rotating water pipe (12) is connected to the rocker arm nozzle (13), and the other end is rotatably connected to the outlet pipe of a water pump. The rotating water pipe (12) is rotatably connected to the mounting cylinder (10) via the drive assembly. The rotating water pipe (12) and the mounting cylinder (10) are coaxially arranged. The drive assembly is located between the mounting cylinder (10) and the rotating water pipe (12). The nozzle (16) is mounted on the rocker arm nozzle (13), and the water-blocking pressure plate (15) is... The mounting cylinder (10) is rotatably connected to the side of the rocker arm nozzle (13). During operation, the mounting cylinder (10) is fixed to the soil, and the drive assembly drives the rotating water pipe (12) to rotate relative to the mounting cylinder (10). The water-blocking pressure plate (15) is used to control the direction of water flow at the nozzle (16). It also includes an ultrasonic sensor (8) and a servo motor (6). The ultrasonic sensor (8) is located on the side of the rocker arm nozzle (13), and the servo motor (6) is mounted on the side of the rocker arm nozzle (13). The water-blocking pressure plate (15) is mounted on the output shaft of the servo motor (6). It also includes a first plate (19), a second plate (20), and a third plate (21). The first plate (19) is disposed in the middle of the mounting cylinder (10), the second plate (20) is mounted at one end of the mounting cylinder (10), and the third plate (21) is mounted at the other end of the mounting cylinder (10). The first plate (19), the second plate (20), and the third plate (21) are all sleeved on the rotating water pipe (12). The rotating water pipe (12) is rotatable relative to the first plate (19), the rotating water pipe (12) is rotatable relative to the second plate (20), and the rotating water pipe (12) is rotatable relative to the third plate (21). The driving assembly includes a stepper motor (22) and a drive wheel (18). The stepper motor (22) is mounted on... Mounted on the first plate (19), the drive wheel (18) is mounted on the output shaft of the stepper motor (22), and the inner wall of the mounting cylinder (10) and the outer wall of the rotating water pipe (12) are tangent to the side of the drive wheel (18); it also includes a controller, which is mounted on the second plate (20), and the servo motor (6), the stepper motor (22), the soil moisture sensor (17), the temperature and humidity sensor (9) and the ultrasonic sensor (8) are all electrically connected to the controller; the controller includes a main controller, a first slave controller and a second slave controller, the soil moisture sensor (17) is connected to the main controller, and the temperature and humidity sensor (9) and the ultrasonic sensor (8) are connected to the first slave controller; two of the three stepper motors (22) that control the horizontal rotation of the nozzle are connected to the first slave controller, and the servo motor (6) is connected to the second slave controller;A third stepper motor (22) assists in the horizontal rotation of the nozzle and is connected to a second slave controller; ultrasonic ranging is performed by an ultrasonic sensor (8) and fed back to the controller. The controller calculates the pitch angle of the water-blocking pressure plate (15) based on the distance. The nozzle rotation speed can be set according to the soil moisture by setting a temperature and humidity sensor (9) and a soil moisture sensor (17); it also includes a servo bracket (11) and an ultrasonic sensor bracket (14). The servo (6) is mounted on the rocker-arm nozzle (13) through the servo bracket (11), the ultrasonic sensor (8) is mounted on the rocker-arm nozzle (13) through the ultrasonic sensor bracket (14), the soil moisture sensor (17) is mounted on the mounting cylinder (10), and the temperature and humidity sensor (9) is mounted on the servo bracket (11).

2. The irrigation nozzle according to claim 1, characterized in that, The water-blocking plate (15) includes a water-blocking plate (152) and a rotating rod (151). One end of the rotating rod (151) is connected to the output shaft of the servo motor (6), and the other end of the rotating rod (151) is provided with the water-blocking plate (152). The angle between the water-blocking plate (152) and the central axis of the nozzle (16) is between 90 degrees and 180 degrees.

3. The irrigation nozzle according to claim 1, characterized in that, The angle between the central axis of the ultrasonic sensor (8) and the central axis of the nozzle (16) is between 30 and 150 degrees.

4. A spraying method using an irrigation sprinkler head, comprising any one of claims 1 to 3, characterized in that, It also includes the following steps: Step S100: Detect soil moisture using soil moisture sensor (17), and detect air temperature and humidity using temperature and humidity sensor (9), and feed back soil moisture and air temperature and humidity to the controller; Step S200: The speed of the stepper motor (22) is controlled by the controller to set the rotation speed of the nozzle; Step S300: Ultrasonic ranging is performed by ultrasonic sensor (8) and fed back to controller. The controller calculates the pitch angle of water-blocking pressure plate (15) based on the distance. Step S400: The controller controls the servo motor (6) to rotate to the specified pitch angle, and the nozzle sprays normally; Step S500: Spraying is completed.

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