Spray irrigation equipment and method

Abstract

The invention relates to spray irrigation equipment and method, and belongs to the technical field of irrigation, a plurality of spray irrigation units are arranged on the side face of an irrigation area at intervals, and the spray irrigation area of the spray irrigation units completely covers the irrigation area; the water tower is arranged on the outer side of the irrigation area, connected with the sprinkling irrigation unit through a pipeline and used for storing a water source, and the water source is naturally injected into the sprinkling irrigation unit through the height difference between the water tower and the sprinkling irrigation unit; the air compressor is arranged on the outer side of the irrigation area, the air compressor is connected with the spray irrigation unit through a pipeline, and compressed air generated by the air compressor generates negative pressure in the spray irrigation unit to suck out a water source and scatter the water source at a high speed and spray the water source to the irrigation area; the technical problem that in the prior art, soluble minerals form incrustation, a small-interval structure is blocked, and the sprinkling irrigation stability is affected can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of axial flow fan production and manufacturing, and in particular relates to spray irrigation equipment and method. Background Art

[0002] Spray irrigation, also known as sprinkler irrigation, involves spraying water evenly onto the soil and crops in the form of fine droplets. It simulates natural rainfall and effectively addresses the water waste and uneven irrigation patterns associated with traditional surface irrigation.

[0003] The existing patent with announcement number CN209218814U discloses a sprinkler irrigation device, including a water tank, a water pump and a water supply network; the water pump draws water from the water tank through a pipe and flows into one side of the water supply network, the water supply network is a meandering delivery pipe, and the upper layer of the meandering delivery pipe is provided with a plurality of vertically or horizontally arranged isolation grilles to form a water outlet. To prevent the water passing through the meandering delivery pipe from clogging the isolation grilles, the spacing between the two isolation grilles is 0.1 mm, and the isolation grilles with smaller gaps completely filter impurities outside the water outlet 5.

[0004] The existing technology has the following problems:

[0005] There are soluble minerals in municipal water supply or natural water sources. When used for a long time, the soluble minerals will precipitate and deposit to form scale. The condensation of scale will cause the clogging of small-pitch isolation grilles or similar filtering devices and nozzles, affecting the stability of sprinkler irrigation. Summary of the Invention

[0006] The present invention provides a spray irrigation device and method, which can solve the technical problem in the prior art that soluble minerals form scale, causing blockage of small-spacing structures and affecting the stability of spray irrigation.

[0007] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0008] The present application provides a spray irrigation device, which comprises:

[0009] A plurality of sprinkler irrigation units are arranged at intervals on the sides of the irrigation area, and the sprinkler irrigation areas of the plurality of sprinkler irrigation units fully cover the irrigation area;

[0010] A water tower is provided outside the irrigation area, the water tower is connected to the sprinkler unit pipeline, the water tower is used to store water, and the water is naturally injected into the sprinkler unit due to the height difference between the water tower and the sprinkler unit;

[0011] The air compressor is arranged outside the irrigation area and is connected to the sprinkler unit pipeline. The compressed air generated by the air compressor generates negative pressure in the sprinkler unit to suck out the water source and spray the water source at high speed toward the irrigation area.

[0012] Through the above technical solution, the negative pressure formed by compressed air is used to absorb water and disperse water to form water mist, which can reduce the problem of scale formation and clogging in the filtering device for the water source and the small nozzles, thereby improving the stability of sprinkler irrigation.

[0013] In the present invention, the above-mentioned sprinkler irrigation unit includes:

[0014] The water reservoir is used to store the water injected by the water tower;

[0015] The pool cover is arranged on the top of the water reservoir;

[0016] A water suction pipe is plugged into the pool cover, and one end of the water suction pipe is inserted into the water source in the water reservoir;

[0017] The negative pressure cover is rotatably connected to one end of the water suction pipe away from the water reservoir, the negative pressure cover is connected to the air compressor pipeline, and a water spray pipe is provided at one end of the negative pressure cover away from the air compressor.

[0018] Through the above technical solution, the water source in the water reservoir is sucked under negative pressure using a suction pipe and a negative pressure cover. The different densities of water and impurities can be used for gravity separation to reduce the blockage of the suction pipe by large particles of impurities or the impact on the negative pressure cover, thereby improving the safety of operation.

[0019] In the present invention, the above-mentioned sprinkler irrigation unit includes:

[0020] The control unit is connected to one end of the pool cover away from the water reservoir. The control unit has a valve group connected between the air compressor and the negative pressure cover. The valve group has a solenoid valve and a pressure regulating valve.

[0021] Through the above technical solution, a valve group is used to control the on / off and spray pressure of the compressed air, thereby controlling the coverage distance and start / stop of the spray.

[0022] In the present invention, the above-mentioned sprinkler irrigation unit includes:

[0023] The sleeve is non-rotatably sleeved on the outer side of the water suction pipe;

[0024] The rotating frame is rotatably connected to the outer side of the sleeve, and the rotating frame is connected to the negative pressure cover;

[0025] The stepper motor is fixedly connected to the rotating frame, the stepper motor is transmission-connected to the sleeve, and the stepper motor is electrically connected to the control unit;

[0026] When the stepper motor rotates, it drives the rotating frame to rotate relative to the sleeve. When the rotating frame rotates, it drives the negative pressure cover to rotate at one end of the water suction pipe, thereby changing the spraying direction of the water spray pipe.

[0027] Through the above technical solution, the mutual rotation relationship of the sleeve, the rotating frame and the stepping motor is adopted to realize the controllable electric drive to adjust the spraying direction of the water sprinkler pipe, thereby improving the directional sprinkler irrigation capability of the sprinkler unit.

[0028] In the present invention, the above-mentioned sprinkler irrigation unit includes:

[0029] The wind measuring plate is connected to a side of the negative pressure cover facing away from the irrigation area;

[0030] A strain gauge is connected to the bottom of the wind measuring plate, and the strain gauge is electrically connected to the control unit;

[0031] When the sprinkler unit is hit by a side wind, the wind measuring plate generates a rotational force and the strain gauge is twisted. The electrical signal generated by the strain gauge distortion is transmitted to the control unit, and the control unit controls the rotation of the stepper motor according to the electrical signal.

[0032] Through the above technical solution, a wind measuring plate and a strain gauge are used to identify the wind direction, and then the control unit controls the stepper motor to drive the water suction pipe to make adaptive angle adjustments to correct the sprinkler coverage range, thereby improving the wind resistance of the equipment.

[0033] The present application also provides a spray irrigation method, which uses the above-mentioned spray irrigation equipment and further includes the following steps:

[0034] Step S10: injecting water into the sprinkler unit at normal pressure using a water tower, and storing water in the water reservoir;

[0035] Step S20: Using an air compressor to introduce compressed air into the sprinkler unit, the compressed air flows at a high speed in the negative pressure cover, thereby forming a negative pressure at the end of the water suction pipe away from the water reservoir, and sucking the water in the water reservoir into the negative pressure cover;

[0036] Step S30: The water source enters the negative pressure cover and is broken up by the high-speed compressed air into a mist form and sprayed from the spray pipe toward the irrigation area.

[0037] Through the above technical solution and method, the use of small structures in the equipment that are in direct contact with the water source can be reduced, thereby reducing the blockage of small structures due to scale deposition and improving the stability of the equipment's sprinkler irrigation.

[0038] In the present invention, the following steps are further included between step S20 and step S30:

[0039] Step S25: The control unit controls the stepper motor to drive the rotating frame to rotate according to the electrical signal generated by the strain gauge being distorted due to the crosswind on the wind measuring plate, thereby changing the direction of the water spray pipe to offset the displacement of the water mist coverage area caused by the crosswind.

[0040] Through the above technical solution and the above method, the wind resistance of the sprinkler unit is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 A schematic diagram of a spray irrigation device provided by an embodiment of the present invention being arranged in an irrigation area;

[0043] Figure 2 An axonometric view of a sprinkler unit provided in an embodiment of the present invention;

[0044] Figure 3 A side view of a sprinkler unit provided in an embodiment of the present invention;

[0045] Figure 4 for Figure 3 The sectional view at AA in the figure;

[0046] Figure 5 A front view of a sprinkler unit provided in an embodiment of the present invention;

[0047] Figure 6 for Figure 5 Cross-sectional view at BB in the figure;

[0048] Figure 7 This is an exploded view of the structure of the sprinkler unit provided in an embodiment of the present invention after removing the water reservoir and the pool cover.

[0049] Icons: 1-Sprinkler unit; 101-Water reservoir; 1011-Water pipe; 1012-Conical pool bottom; 102-Pool cover; 103-Suction pipe; 1031-Locking nut; 1032-Negative pressure cover; 1033-Sprinkler pipe; 110-Control unit; 111-Air pipe; 1121-Hard elbow; 1122-Hose; 120-Casing; 1201-Upper casing; 1202-Lower casing; 1203-Bearing; 121-Rotating frame; 122-Stepping motor; 123-Lifting frame; 130-Wind measuring plate; 131-Strain gauge; 132-Counterweight ball; 133-Support rod; 2-Irrigation area; 3-Water tower; 4-Air compressor. DETAILED DESCRIPTION

[0050] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0051] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0052] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0053] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installation," "connection," and "connection" should be understood in a broad sense. For example, they can refer to welding, bolting, or riveting; fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0054] Example:

[0055] Please refer to Figures 1 to 7 , Figures 1 to 7 An embodiment of the present application is shown.

[0056] like Figure 1 As shown, this embodiment provides a spray irrigation device, which includes:

[0057] A plurality of sprinkler irrigation units 1 are arranged at intervals on the sides of the irrigation area 2, and the sprinkler irrigation areas of the plurality of sprinkler irrigation units 1 fully cover the irrigation area 2;

[0058] The water tower 3 is arranged outside the irrigation area 2 and is connected to the sprinkler unit 1 through a pipeline. The water tower 3 is used to store water. The water is naturally injected into the sprinkler unit 1 through the height difference between the water tower 3 and the sprinkler unit 1.

[0059] The air compressor 4 is arranged outside the irrigation area 2 and is connected to the sprinkler unit 1 through a pipeline. The compressed air generated by the air compressor 4 generates negative pressure in the sprinkler unit 1 to suck out the water source and spray the water source at high speed toward the irrigation area 2.

[0060] When in use, the sprinkler unit 1 is arranged after reasonable calculation based on the size of the specific irrigation area 2, the sprinkler irrigation requirements and the coverage area of ​​the sprinkler unit 1. The water tower 3 can also be a water storage tank at a high place, or any structure with a water storage function and set higher than the sprinkler unit 1, and water is replenished through natural water sources or municipal water supply; the air compressor 4 is set up in an independent machine room and uses municipal power supply or independent generator, photovoltaic power supply, etc.; Figure 4 As shown, the sprinkler unit 1 has two water pipes 1011 for connecting to each other or connecting to the water tower 3 so that water can be injected into all sprinkler units 1 at normal pressure. At the same time, the air compressor 4 is connected to the air pipe 111, which is passed through the water pipe 1011 and connected to the sprinkler unit 1 to reduce the risk of aging caused by exposure of the air pipe to the outside world and damage caused by external forces.

[0061] It should be noted that the air compressor 4 and the water tower 3 are both existing technologies. Those skilled in the art can purchase appropriate size specifications and corresponding supporting equipment, as well as installation requirements and specific installation through public channels. Their specific structure and how to use them do not fall within the scope of protection of this application.

[0062] Through the above technical solution, the negative pressure formed by compressed air is used to absorb water and disperse water to form water mist, which can reduce the problem of scale formation and clogging in the filtering device for the water source and the small nozzles, thereby improving the stability of sprinkler irrigation.

[0063] As a better implementation method, Figures 2 to 6 Said sprinkler unit 1 comprises:

[0064] The water reservoir 101 is used to store the water source injected by the water tower 3. The bottom of the water reservoir 101 has a conical bottom 1012;

[0065] The pool cover 102 is arranged on the top of the water reservoir 101 and can allow air to freely enter the water reservoir 101;

[0066] The water suction pipe 103 is plugged into the pool cover 102 and fastened to the middle of the pool cover 102 by a locking nut 1031. One end of the water suction pipe 103 is inserted into the water source in the water reservoir 101 and close to the conical pool bottom 1012.

[0067] The negative pressure cover 1032 is rotatably connected to the end of the suction pipe 103 facing away from the water reservoir 101. If necessary, a sealed bearing or other anti-slip structure can be used to strengthen it. The negative pressure cover 1032 is connected to the air compressor 4 through the air pipe 111. A water spray pipe 1033 is provided at the end of the negative pressure cover 1032 facing away from the air compressor 4.

[0068] During use, the compressed gas generated by the air compressor 4 is blown into the negative pressure cover 1032 through the air supply pipe 111 and directly blown to the water spray pipe 1033. The high airflow generates negative pressure at the top of the water suction pipe 103. The water source at the bottom of the water suction pipe 103 rises under the pressure of atmospheric pressure, and is then dispersed by the high-speed airflow in the negative pressure cover 1032 to form water mist, which is then sprayed out along the water spray pipe 1033.

[0069] It should be noted that, according to actual irrigation needs, technical personnel in this field can adaptively adjust the height and inner diameter of the water suction pipe 103 and the output air pressure of the air compressor 4 to obtain the best sprinkler irrigation effect through a limited number of tests; because the water extraction method adopted is negative pressure suction, small particles of solid impurities such as gravel and gravel in the water will form deposits at the bottom of the conical pool 1012, but because there are still gaps between the solid impurities that allow water to pass through, it will not affect the efficiency of negative pressure water suction.

[0070] Through the above technical solution, the water source in the water reservoir 101 is sucked under negative pressure using the suction pipe 103 and the negative pressure cover 1032. The different densities of water and impurities can be used for gravity separation to reduce the blockage of the suction pipe 103 or the impact of large particle impurities on the negative pressure cover 1032, thereby improving the safety of operation.

[0071] As a preferred embodiment, the sprinkler unit 1 includes:

[0072] The control unit 110 is connected to one end of the pool cover 102 away from the water reservoir 101. The control unit 110 has a valve group connected between the air compressor 4 and the negative pressure cover 1032. The valve group has a solenoid valve and a pressure regulating valve.

[0073] It should be noted that the specific valve group structure, control system, control circuit board of the control unit 110, etc. can be purchased and selected by those skilled in the art through public channels. The specific circuit and air control system can also be simply transferred through textbooks, technical manuals, technical dictionaries, etc. The internal structure of the control unit 110 does not fall within the scope of protection of this application. When using this part of the technical solution, the control unit 110 should be regarded as a whole, and the synergistic effect of the control unit 110 and other technical features should be considered.

[0074] Through the above technical solution, a valve group is used to control the on / off and spray pressure of the compressed air, thereby controlling the coverage distance and start / stop of the spray.

[0075] As a better implementation method, Figure 4 、 Figure 6 as well as Figure 7 As shown, the above-mentioned sprinkler unit 1 includes:

[0076] The sleeve 120 is non-rotatably sleeved on the outside of the suction pipe 103 and comprises an upper sleeve 1201 and a lower sleeve 1202, which are threadedly connected to each other and are rotationally limitedly connected to the ribs on the outside of the suction pipe 103 via a limiting groove. The lower sleeve 1202 is also connected with a bearing 1203.

[0077] The rotating frame 121 is connected to the outer side of the sleeve 120 by being rotatably engaged with the bearing 1203. The rotating frame 121 is also connected to the lifting frame 123. The lifting frame 123 is connected to the hard curved pipe 1121. The hard curved pipe 1121 is connected to the negative pressure cover 1032. A hose 1122 is connected between the hard curved pipe 1121 and the control unit 110.

[0078] The stepper motor 122 is fixedly connected to the rotating frame 121. The stepper motor 122 is connected to the gears at both ends of the sleeve 120 through the gears at both ends. The stepper motor 122 is electrically connected to the control unit 110, and the control unit 110 supplies power and stepping drive to the stepper motor 122.

[0079] When the stepper motor 122 rotates, it drives the rotating frame 121 to rotate relative to the sleeve 120 . When the rotating frame 121 rotates, it drives the negative pressure cover 1032 to rotate at one end of the water suction pipe 103 , thereby changing the spraying direction of the water spray pipe 1033 .

[0080] Through the above technical solution, the mutual rotation relationship of the sleeve 120, the rotating frame 121 and the stepping motor 122 is adopted to realize the controllable electric drive to adjust the spraying direction of the water spray pipe 1033, thereby improving the directional spraying capability of the sprinkler unit 1.

[0081] As a better implementation method, Figure 2 As shown, the above-mentioned sprinkler unit 1 includes:

[0082] The wind measuring plate 130 is connected to the side of the negative pressure cover 1032 facing away from the irrigation area 2, and the wind measuring plate 130 is connected to the counterweight ball 132 through a crossbar;

[0083] The strain gauge 131 is connected to the bottom of the wind measuring plate 130 , and the wind measuring plate 130 is balanced on the strain gauge 131 by the weight ball 132 . The strain gauge 131 is electrically connected to the control unit 110 .

[0084] When the sprinkler unit 1 is hit by a crosswind, the wind measuring plate 130 generates a rotational force and the strain gauge 131 is twisted. The electrical signal generated by the distortion of the strain gauge 131 is transmitted to the control unit 110, and the control unit 110 controls the stepper motor 122 to rotate according to the electrical signal.

[0085] It should be noted that the strain gauge 131 is a mature means of existing technology. Those skilled in the art can purchase suitable strain gauges 131 through public channels according to specific needs, and can also learn about the supporting devices required for the use of the strain gauge 131 through textbooks, technical manuals, technical dictionaries, etc., and adapt them. Therefore, when using, the strain gauge 131 should be identified as a complete technical solution, and then the synergy with other technical solutions during normal use should be considered, rather than considering the inoperability of the strain gauge 131 under specific circumstances; for the measurement of wind speed, the conventional wind speed weather suitable for sprinkler irrigation should be considered, and the practicality of the equipment should not be evaluated by assuming that the equipment is in extreme weather that is not suitable for sprinkler irrigation.

[0086] Through the above technical solution, the wind measuring plate 130 and the strain gauge 131 are used to identify the wind direction and then the control unit 110 controls the stepper motor 122 to drive the water suction pipe 103 to make adaptive angle adjustments to correct the sprinkler coverage range, thereby improving the wind resistance of the equipment.

[0087] The specific steps include:

[0088] Step S10: injecting water into the sprinkler unit 1 at normal pressure using the water tower 3 and storing the water in the water reservoir 101;

[0089] Step S20: Using the air compressor 4 to introduce compressed air into the sprinkler unit 1, the compressed air flows at high speed in the negative pressure cover 1032, thereby forming a negative pressure at the end of the water suction pipe 103 away from the water reservoir 101, and sucking the water in the water reservoir 101 into the negative pressure cover 1032;

[0090] Step S30: The water source enters the negative pressure cover 1032 and is broken up by the high-speed compressed air into a mist form and sprayed from the water spray pipe 1033 toward the irrigation area 2.

[0091] Through the above technical solution and method, the use of small structures in the equipment that are in direct contact with the water source can be reduced, thereby reducing the blockage of small structures due to scale deposition and improving the stability of the equipment's sprinkler irrigation.

[0092] As a preferred embodiment, the above steps S20 and S30 further include:

[0093] Step S25: The control unit 110 controls the stepper motor 122 to drive the rotating frame 121 to rotate according to the electrical signal generated by the strain gauge 131 being distorted by the side wind on the wind measuring plate 130, thereby changing the direction of the water spray pipe 1033 to offset the displacement of the water mist coverage area caused by the side wind.

[0094] Through the above technical solution and the above method, the wind resistance of the sprinkler unit 1 is improved.

[0095] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A spray irrigation device, characterized in that: include: A plurality of sprinkler irrigation units (1) are arranged at intervals on the sides of the irrigation area (2), and the combined sprinkler irrigation area of ​​the plurality of sprinkler irrigation units (1) fully covers the irrigation area (2); A water tower (3) is arranged outside the irrigation area (2), the water tower (3) is connected to the sprinkler unit (1) through a pipeline, the water tower (3) is used to store water, and the water is naturally injected into the sprinkler unit (1) through the height difference between the water tower (3) and the sprinkler unit (1); An air compressor (4) is arranged outside the irrigation area (2). The air compressor (4) is connected to the sprinkler unit (1) via a pipeline. The compressed air generated by the air compressor (4) generates negative pressure in the sprinkler unit (1) to suck out the water source and disperse the water source at high speed and spray it toward the irrigation area (2).

2. The spray irrigation equipment according to claim 1, characterized in that: The sprinkler unit (1) comprises: A water reservoir (101) for storing the water injected from the water tower (3); A pool cover (102) is provided on the top of the water reservoir (101); A water suction pipe (103) is plugged into the pool cover (102), and one end of the water suction pipe (103) is inserted into the water source in the water reservoir (101); The negative pressure cover (1032) is rotatably connected to the end of the water suction pipe (103) facing away from the water reservoir (101), the negative pressure cover (1032) is connected to the air compressor (4) pipeline, and the end of the negative pressure cover (1032) facing away from the air compressor (4) is provided with a water spray pipe (1033).

3. The spray irrigation equipment according to claim 2, characterized in that: The sprinkler unit (1) comprises: A control unit (110) is connected to an end of the pool cover (102) facing away from the water reservoir (101). The control unit (110) has a valve group connected between the air compressor (4) and the negative pressure cover (1032). The valve group has a solenoid valve and a pressure regulating valve.

4. The spray irrigation equipment according to claim 3, characterized in that: The sprinkler unit (1) comprises: A sleeve (120) is non-rotatably sleeved on the outside of the water suction pipe (103); A rotating frame (121) is rotatably connected to the outside of the sleeve (120), and the rotating frame (121) is connected to the negative pressure cover (1032); A stepper motor (122) is fixedly connected to the rotating frame (121), the stepper motor (122) is transmission-connected to the sleeve (120), and the stepper motor (122) is electrically connected to the control unit (110); When the stepping motor (122) rotates, it drives the rotating frame (121) to rotate relative to the sleeve (120). When the rotating frame (121) rotates, it drives the negative pressure cover (1032) to rotate at one end of the water suction pipe (103), thereby changing the spraying direction of the water spray pipe (1033).

5. The spray irrigation equipment according to claim 4, characterized in that: The sprinkler unit (1) comprises: A wind measuring plate (130) connected to a side of the negative pressure cover (1032) facing away from the irrigation area (2); A strain gauge (131) is connected to the bottom of the wind measuring plate (130), and the strain gauge (131) is electrically connected to the control unit (110); When the sprinkler unit (1) is hit by a crosswind, the wind measuring plate (130) generates a rotational force, causing the strain gauge (131) to twist. An electrical signal generated by the twisting of the strain gauge (131) is transmitted to the control unit (110), and the control unit (110) controls the stepping motor (122) to rotate according to the electrical signal.

6. A spray irrigation method, characterized in that: The spray irrigation device according to claim 5 is used, further comprising the following steps: Step S10: injecting water into the sprinkler unit (1) at normal pressure using a water tower (3), and storing the water in the water reservoir (101); Step S20: using an air compressor (4) to introduce compressed air into the sprinkler unit (1), the compressed air flowing at high speed in the negative pressure cover (1032) and forming a negative pressure at the end of the water suction pipe (103) facing away from the water reservoir (101), thereby sucking the water source in the water reservoir (101) into the negative pressure cover (1032); Step S30: The water source enters the negative pressure cover (1032) and is dispersed by the high-speed compressed air to form a mist, which is then sprayed from the water spray pipe (1033) toward the irrigation area (2).

7. The spray irrigation method according to claim 6, characterized in that: The steps between step S20 and step S30 also include: Step S25: The control unit (110) controls the stepping motor (122) to drive the rotating frame (121) to rotate based on the electrical signal generated by the strain gauge (131) being twisted and deformed due to the wind measuring plate (130) being hit by the side wind, thereby changing the direction of the water spray pipe (1033) to offset the displacement of the water mist coverage area caused by the side wind.

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