A hidden rotary sprinkling device and a nozzle structure with uniform spraying and anti-blocking

Abstract

This invention discloses a concealed rotary sprinkler irrigation device and nozzle structure with uniform spraying and anti-clogging properties. It includes a telescopic pipe connector, a cylinder, a guide plate, a rotating structure, a nozzle connector, and a nozzle structure. The telescopic pipe connector, cylinder, nozzle connector, and nozzle structure form a water flow channel. The rotating structure is connected below the nozzle connector, and the guide plate is located below the rotating structure. The nozzle structure is connected to the upper end of the nozzle connector. The nozzle structure includes a nozzle body, a near-spray nozzle, and a far-spray nozzle. The cylinder is located between the telescopic pipe connector and the nozzle structure. The far-spray nozzle includes a water outlet plate, a diaphragm, and a nozzle body located on the side wall of the nozzle body. The water outlet plate is covered with an openable diaphragm. The nozzle body is fixed to the side wall of the mounting groove above the diaphragm. When spraying water, the diaphragm flaps open, and water flows out from the nozzle body. When spraying ends, the diaphragm flaps return to their original position, covering the water outlet plate to prevent debris from entering the cavity of the nozzle body.

Description

Technical Field

[0001] This invention relates to a concealed rotary sprinkler irrigation device and nozzle structure that provides uniform spraying and prevents clogging. Background Technology

[0002] Sprinkler irrigation is an advanced irrigation technology that saves water while achieving significant irrigation effects. Due to increasing global water scarcity, in the coming years, arid regions will primarily rely on micro-irrigation, including sprinkler and drip irrigation. In non-arid regions, however, it is essential to improve water use efficiency. Natural conditions vary greatly worldwide, including arid, semi-arid, semi-humid, and humid regions. Areas with low rainfall urgently need to develop water-saving irrigation technologies, while in areas with abundant rainfall, uneven rainfall distribution often leads to seasonal droughts in spring, summer, and autumn. Therefore, sprinkler irrigation technology has gained significant attention and widespread application globally.

[0003] Due to their structural characteristics, existing buried sprinkler heads result in uneven water distribution within their spray range during irrigation, leading to insufficient or even no water coverage directly below the sprinkler head, creating a "blind spot" phenomenon. To solve this problem, more sprinklers must be installed, sacrificing distance and increasing costs.

[0004] During irrigation, large amounts of water containing fertilizer are sprayed into the topsoil of farmland. Because the soil contains a lot of sand and gravel, the sprayed water softens the soil, forming a muddy, sandy mess. In open-channel underground sprinkler systems, the nozzles are directly connected to the channel branch pipes. After the irrigation is completed, the sprinkler heads retract into the soil. At this time, the muddy water containing sand and fertilizer flows back into the sprinkler system through the nozzles. Since sprinkler irrigation water sources are generally located in low-lying areas, after the water pump stops working, the water in the sprinkler system pipes will flow back due to gravity, creating a siphon effect. The fertilizer-containing water flowing back into the nozzles is drawn back to the water source, causing water pollution, especially in irrigation systems using groundwater, which can lead to groundwater pollution. The sandy, muddy water flowing back into the nozzles hardens into lumps after the water evaporates, causing blockages. During the next irrigation cycle, this results in no water flow or a small flow, requiring manual clearing, thus wasting manpower and resources. Summary of the Invention

[0005] The purpose of this invention is to provide a concealed rotary sprinkler irrigation device and nozzle structure that provides uniform spraying and prevents clogging.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A concealed rotary sprinkler irrigation device with uniform spraying and anti-clogging properties includes a telescopic pipe connector, a cylinder, a guide plate, a rotating structure, a nozzle connector, and a nozzle structure. The telescopic pipe connector, the cylinder, the nozzle connector, and the nozzle structure form a water flow channel. The rotating structure is connected below the nozzle connector, and the guide plate is disposed below the rotating structure. The nozzle structure is connected to the upper end of the nozzle connector. The nozzle structure includes a nozzle body, a near-spray nozzle, and a far-spray nozzle. The cylinder is located between the telescopic pipe connector and the nozzle structure. The far-spray nozzle includes a water outlet plate located on the side wall of the nozzle body. The water outlet plate is covered with an openable diaphragm on its outer side. The nozzle body is fixed to the outer side of the diaphragm. When water is sprayed, the water flows in through the guide plate, driving the rotating structure to rotate. The rotating structure drives the nozzle connector and the nozzle body to rotate. The water flow pushes open the diaphragm flaps and sprays out from the nozzle body. When the water spraying ends, the diaphragm flaps return to their original position and cover the water outlet plate to prevent debris from entering the cavity of the nozzle body. The near-spray nozzle is used to supplement the areas that the far-spray nozzle cannot reach at close range.

[0008] Specifically, the far-spray nozzle is located on the upper conical sidewall of the nozzle body, the water outlet plate is integrally formed with the nozzle body, and an installation groove is formed on the outer side of the water outlet plate. The water outlet plate has several evenly spaced water outlet holes. The diaphragm is made of soft rubber and is cut with rice-shaped lobes. The nozzle body is fixed to the sidewall of the installation groove, and the bottom wall of the nozzle body abuts against the outer ring of the diaphragm.

[0009] Specifically, the outer wall of the water outlet plate has a positioning protrusion, the outer ring of the diaphragm has a positioning hole, the diaphragm is fitted onto the positioning protrusion through the positioning hole, the bottom wall of the nozzle body has an insertion hole, the insertion hole is inserted into the positioning protrusion, the nozzle body is interference-fitted with the side wall of the mounting groove; and / or the nozzle body includes a tube, and several dispersion ribs are spaced around the inner wall of the tube, with a gap between the bottom wall of the dispersion ribs and the diaphragm.

[0010] Specifically, the near-spray nozzle includes a near-spray elongated mounting groove opened on the pentagonal pyramidal sidewall of the nozzle body. A strip-shaped water-dividing baffle is hinged to the upper sidewall of the mounting groove. An opening is provided in the bottom plate of the mounting groove. The inner wall of the water-dividing baffle is stepped. The bottom wall of the mounting groove matches the stepped inner wall of the water-dividing baffle. The water-dividing baffle includes a first baffle tooth, a second baffle tooth, and a third baffle tooth spaced apart from top to bottom. The height of the first baffle tooth is less than the height of the second baffle tooth. The direction of the third baffle tooth is opposite to the direction of the first baffle tooth and the second baffle tooth and is higher than the height of the second baffle tooth.

[0011] Specifically, the angle α between the axis of the mounting groove and the axis of the nozzle structure is 45 to 65 degrees; the angle β between the water-dividing baffle and the axis of the nozzle structure after the water-dividing baffle is opened is 38 to 58 degrees; the cross-section of the first baffle tooth is a right-angled triangle, with its right-angled side facing the top, the hypotenuse of the third baffle tooth facing the hypotenuse of the second baffle tooth, the distance from the right-angled side of the first baffle tooth to the top wall of the hinge end is 1 / 3 of the total length of the water-dividing baffle, the distance from the right-angled side of the second baffle tooth to the top wall of the hinge end is 2 / 3 of the total length of the water-dividing baffle, the height of the first baffle tooth is 1 / 3 of the height of the third baffle tooth, and the height of the second baffle tooth is 2 / 3 of the height of the third baffle tooth.

[0012] Specifically, the telescopic pipe connector includes an upper large-diameter pipe and a lower small-diameter pipe. The upper large-diameter pipe has an internal thread, and the lower small-diameter pipe has an external thread. The lower end of the cylinder is screwed to the internal thread of the telescopic pipe connector. A guide plate is installed at the lower end of the cavity of the cylinder. The upper end of the cylinder is Z-shaped and stepped, located below the nozzle body. An annular groove is provided in the vertical pipe wall of the nozzle body. A spring is placed in the annular groove, and a wear-resistant pad A is sealed below the spring. A wear-resistant pad B, aligned with the gap of wear-resistant pad A, is provided at the outer step of the upper end of the cylinder. A rotary seal is provided between the connector and the upper end of the cylinder; and / or the rotary device includes an impeller and a planetary gear reducer, the impeller is connected to the input shaft of the planetary gear reducer, the output shaft of the planetary gear reducer is connected to the nozzle connector, the impeller is located above the guide plate, the impeller and the planetary gear reducer are located in the cylinder, the upper end of the nozzle connector extends out of the upper opening of the cylinder, the upper end of the nozzle connector is provided with an external thread section, which is threadedly connected to the nozzle body of the nozzle structure, and the nozzle connector is provided with a channel connecting the cylinder and the nozzle.

[0013] A nozzle structure includes a nozzle body, a near-spray nozzle, and a far-spray nozzle. The far-spray nozzle includes a water outlet plate located on the nozzle body. The outer side of the water outlet plate is covered with an openable diaphragm. The nozzle body is fixed to the outer side of the diaphragm. When water is sprayed, the diaphragm flaps open, and water flows out from the nozzle body. When water spraying ends, the diaphragm flaps return to their original position and cover the water outlet plate to prevent debris from entering the cavity of the nozzle body.

[0014] Specifically, the far-spray nozzle is located on the upper pentagonal pyramidal sidewall of the nozzle body. The water outlet plate is integrally formed with the nozzle body, and an installation groove is formed on the outer side of the water outlet plate. The water outlet plate has several evenly spaced water outlet holes. The diaphragm is made of soft rubber and is cut with rice-shaped lobes. The outer wall surface of the water outlet plate has a positioning protrusion. The outer ring of the diaphragm has a positioning hole. The diaphragm is fitted onto the positioning protrusion through the positioning hole. The bottom wall of the nozzle body has an insertion hole that is inserted into the positioning protrusion. The nozzle body is interference-fitted with the sidewall of the installation groove, and / or the nozzle body includes a tube. Several dispersion ribs are spaced around the inner wall of the tube. There is a gap between the bottom wall of the dispersion ribs and the diaphragm.

[0015] Specifically, the near spray nozzle includes a near spray mounting groove opened on the pentagonal pyramidal sidewall of the nozzle body. A strip-shaped water-dividing baffle is hinged to the upper sidewall of the mounting groove. An opening is provided in the bottom plate of the mounting groove. The inner wall of the water-dividing baffle is stepped. The bottom wall of the mounting groove matches the stepped inner wall of the water-dividing baffle in a step-like manner. From top to bottom, it includes a first baffle tooth, a second baffle tooth, and a third baffle tooth spaced apart in sequence. The height of the first baffle tooth is less than the height of the second baffle tooth. The direction of the third baffle tooth is opposite to the direction of the first baffle tooth and the second baffle tooth and is higher than the height of the second baffle tooth.

[0016] Specifically, the angle α between the axis of the mounting groove and the axis of the nozzle structure is 45 degrees to 65 degrees; the angle β between the water-dividing baffle and the axis of the nozzle structure after the water-dividing baffle is opened is 38 degrees to -58 degrees; the cross-section of the first baffle tooth is a right-angled triangle shape, with its right-angled side facing the top, the hypotenuse of the third baffle tooth facing the hypotenuse of the second baffle tooth, the distance from the right-angled side of the first baffle tooth to the top wall of the hinge end is 1 / 3 of the total length of the water-dividing baffle, the distance from the right-angled side of the second baffle tooth to the top wall of the hinge end is 2 / 3 of the total length of the water-dividing baffle, the height of the first baffle tooth is 1 / 3 of the height of the third baffle tooth, and the height of the second baffle tooth is 2 / 3 of the height of the third baffle tooth.

[0017] The beneficial effects of this invention are as follows: First, this invention effectively solves the clogging problem of existing concealed nozzles. A far-spray nozzle is installed on the nozzle body, and a baffle plate is installed in the open flow channel nozzle, ensuring unidirectional flow and preventing mud and water from flowing back into the system and nozzle, thus saving manpower and resources. A near-spray nozzle is installed on the nozzle body, making the spray range more uniform and saving water and time. The stepped baffle plate of different heights effectively disperses the high-pressure water jet from the nozzle evenly within the effective range, effectively solving the problem of insufficient spray volume or even no spray at the bottom of the nozzle. After spraying stops, its own weight naturally falls and seals the spray nozzle. When concealed underground, because mud and water are squeezed from the outside in, the baffle plate seals the spray hole even more tightly, preventing mud and water from entering. The pentagonal pyramid shape of the nozzle body reduces resistance when extending from underground, and the pentagonal pyramid shape helps to clear away moist soil above the device. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention, the embodiments will be described below in conjunction with the accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a cross-sectional structural schematic diagram from one perspective of the present invention.

[0021] Figure 3A This is a cross-sectional view of the present invention from another perspective (near-jet nozzle in the open state).

[0022] Figure 3B This is a cross-sectional view of the present invention from another perspective (near-jet nozzle in closed state).

[0023] Figure 4 This is a schematic diagram showing the exploded structure of the far-spray nozzle.

[0024] Figure 4A yes Figure 4 A schematic diagram of the partially cut-out structure.

[0025] Figure 4B This is a schematic diagram of the diaphragm structure.

[0026] Figure 5 This is a three-dimensional structural diagram showing the proximity nozzle.

[0027] Figure 5A This is a schematic diagram showing the planar structure of the proximity nozzle. Figure 1 .

[0028] Figure 5B This is a schematic diagram of the structure of the near-jet nozzle displaying the water flow trajectory.

[0029] Figure 6 This is a three-dimensional structural diagram of the water-dividing baffle.

[0030] Figure 6A This is a schematic diagram of the flat structure of the water-dividing baffle.

[0031] Figure 7 This is a three-dimensional structural diagram of the nozzle structure of the present invention. Detailed Implementation

[0032] The following examples illustrate possible implementations of the present invention, but are not intended to limit the scope of protection of the present invention.

[0033] like Figures 1 to 6AAs shown, this is an embodiment of the present invention: a concealed rotary sprinkler irrigation device with uniform spraying and anti-clogging properties, comprising a telescopic pipe connector 1, a cylinder 2, a flow guide plate 3, a rotating structure, a nozzle connector 5, and a nozzle structure 6. The telescopic pipe connector 1, cylinder 2, nozzle connector 5, and nozzle structure 6 form a water flow channel. The telescopic pipe connector 1 includes an upper large-diameter pipe and a lower small-diameter pipe. The upper large-diameter pipe has an internal thread, and the lower small-diameter pipe has an external thread. The telescopic pipe connector is threaded to the buried telescopic branch pipe for easy installation, replacement, and maintenance. The lower outer wall of the cylinder 2 is screwed to the internal thread of the telescopic pipe connector 1. The lower end of the cavity of the cylinder 2 is provided with a cavity expansion section, which fixes the flow guide plate 3. The water passage holes of the flow guide plate are inclined and gradually narrowed, causing the water flow inside the device to form a spiral shape. At the same time, due to the smaller area of ​​the water passage holes, the water flow is accelerated into a jet shape, thus forming a jet spiral water flow.

[0034] The upper end of the cylinder is in a stepped Z-shape with an inward curve. The rotating structure includes an impeller 41 and a planetary gear reducer 42. The impeller 41 is connected to the input shaft of the planetary gear reducer 42, and the output shaft of the planetary gear reducer 42 is connected to the nozzle connector 5. The impeller 41 is located above the guide plate 3. The jet-like water flow provides power to the impeller at the input end of the planetary reducer to make it rotate. After being decelerated by the planetary reducer, it slowly drives the nozzle connector and nozzle structure to rotate. The planetary reducer can increase torque while decelerating, so that the entire nozzle can rotate even when buried underground. The impeller 41 and the planetary gear reducer 42 are located in the cylinder 2, and the upper end of the nozzle connector 5 extends out of the upper opening of the cylinder 2. The nozzle connector 5 has an external threaded section at its upper end, which is threadedly and sealed to the nozzle body 61 of the nozzle structure 6. An O-ring 52 is provided above the threaded connection between the nozzle connector and the nozzle body. The nozzle connector has a channel connecting the cylinder and the nozzle body. An annular groove is provided in the vertical tube wall of the nozzle body 61, and a spring 64 is placed in the annular groove. A wear-resistant pad A65 is sealed below the spring. A wear-resistant pad B21 is provided at the outer step at the upper end of the cylinder, which is aligned with the gap of the wear-resistant pad A65. A rotary seal 51 is fitted at the step of the nozzle connector 5, and the upper end face of the rotary seal is attached to the step transition at the upper end of the cylinder. The nozzle structure 6 includes a nozzle body 61, a near-spray nozzle 62, and a far-spray nozzle 63. The spray uniform area of ​​the far-spray nozzle is in an annular range of 3 meters to 11 meters, and the spray radius of the near-spray nozzle is within 4 meters, providing full coverage.

[0035] Specifically, the remote spray nozzle 63 includes a water outlet plate 611 located on the side wall of the nozzle body 61. The water outlet plate 611 is preferably integrally formed with the nozzle body, but it can also be separate. If separate, it is installed at a through hole on the side wall of the nozzle body. The upper outer wall of the nozzle body is a pentagonal pyramid shape, forming a mounting groove on the outer side of the water outlet plate. The angle α between the axis of the mounting groove and the axis of the nozzle structure is 45 to 65 degrees. Six evenly spaced water outlet holes are arranged around the outer periphery of the water outlet plate 611. A positioning protrusion 612 protrudes from the outer wall surface of the water outlet plate 611. A diaphragm 631, made of soft rubber, is covered on the water outlet plate 611. The diaphragm 631 is cut with rice-shaped lobes, and three lobes are arranged around the outer ring of the diaphragm 631. The diaphragm sheet is fitted onto the positioning protrusion 612 through evenly spaced positioning holes 6311. The nozzle body 632 of the far-spray nozzle 63 has an insertion hole on its bottom wall, which is inserted into the positioning protrusion to restrict the displacement of the diaphragm sheet. The nozzle body 632 is interference-fitted with the side wall of the mounting groove. Preferably, the nozzle body 632 includes a tube, with several radially dispersing ribs spaced around the inner wall of the tube to disperse the sprayed water and prevent uneven irrigation caused by direct water jets. A gap is left between the bottom wall of the dispersing ribs and the diaphragm sheet. When spraying water, the diaphragm sheet flaps open, and water flows out from the nozzle body. When spraying ends, the diaphragm sheet flaps return to their original position, covering the water outlet plate to prevent debris from entering the nozzle body's cavity. The near-spray nozzle supplements areas that the far-spray nozzle cannot reach at close range.

[0036] Specifically, the near-spray nozzle 62 includes a rectangular mounting groove 621 and a water-dividing baffle 622 formed on the pentagonal pyramidal sidewall of the nozzle body. The rectangular water-dividing baffle 622 is hinged to the upper sidewall of the mounting groove. An opening 623 is provided in the bottom plate of the mounting groove. The bottom wall of the water-dividing baffle 622 is stepped, and the bottom wall of the mounting groove matches the stepped bottom wall of the water-dividing baffle. From top to bottom, it includes a first baffle tooth 6221, a second baffle tooth 6222, and a third baffle tooth 6223 spaced apart. The height of the first baffle tooth is less than the height of the second baffle tooth, and the direction of the third baffle tooth is opposite to the direction of the first and second baffle teeth and is higher than the height of the second baffle tooth. Preferably, the height of the third stop tooth is H, the height of the first stop tooth is 1 / 3H of the height of the third stop tooth, and the height of the second stop tooth is 2 / 3H of the height of the third stop tooth; the angle β between the water-dividing baffle and the axis of the nozzle structure after the water-dividing baffle is opened is 38 degrees to -58 degrees; the cross-section of the first stop tooth is a right-angled triangle shape, with its right-angled side facing the upper end, the hypotenuse of the third stop tooth facing the hypotenuse of the second stop tooth, the total length of the water-dividing baffle is L, the distance from the right-angled side of the first stop tooth to the top wall of the hinge end is 1 / 3L of the total length of the water-dividing baffle, and the distance from the right-angled side of the second stop tooth to the top wall of the hinge end is 2 / 3L of the total length of the water-dividing baffle, so that the spray radius of the near-spray nozzle is fully covered within 4 meters. When water is sprayed, the water-dividing baffle 622 rotates around the hinge shaft 624, exposing the opening for spraying. After spraying, the water-dividing baffle, under the action of gravity, covers the mounting groove to prevent debris from entering the cavity of the nozzle body. This near-field nozzle effectively compensates for areas that cannot be reached by the far-field nozzle, solving the problem of achieving uniform irrigation by excessively arranging the number of nozzle devices and reducing the spraying range in existing technologies. This achieves the goal of reducing input costs.

[0037] like Figure 7 As shown, a preferred embodiment of the nozzle structure of the present invention is described below, including a nozzle body 10, a near-spray nozzle 20, and a far-spray nozzle 30. The far-spray nozzle includes a water outlet plate, a diaphragm, and a nozzle body. The water outlet plate is integrally formed with the nozzle body, and a mounting groove is formed outside the water outlet plate. The water outlet plate is covered with an openable and closable diaphragm. The nozzle body is fixed at the mounting groove above the diaphragm. When water is sprayed, the diaphragm flaps open, and water flows out from the nozzle body. When water spraying ends, the diaphragm flaps return to their original position and cover the water outlet plate to prevent debris from entering the cavity of the nozzle body. The near-spray nozzle supplements the areas that the far-spray nozzle cannot reach at close range.

[0038] The remote spray nozzle is located on the upper pentagonal pyramidal sidewall of the nozzle body. The water outlet plate has six evenly spaced water outlet holes. The diaphragm is made of soft rubber and is cut with rice-shaped lobes. The outer wall of the water outlet plate has a convex positioning protrusion. The outer ring of the diaphragm has a positioning hole. The diaphragm is fitted onto the positioning protrusion through the positioning hole. The bottom wall of the nozzle body has an insertion hole that is inserted into the positioning protrusion. The nozzle body is interference-fitted with the sidewall of the mounting groove, and / or the nozzle body includes a tube. Several dispersion ribs are spaced around the inner wall of the tube. There is a gap between the bottom wall of the dispersion ribs and the diaphragm. The near-spray nozzle includes a near-spray mounting groove formed on the conical sidewall of the nozzle body. A water-dividing baffle is hinged to the upper sidewall of the mounting groove. An opening is provided in the bottom plate of the mounting groove. The inner wall of the water-dividing baffle is stepped. The bottom wall of the mounting groove matches the stepped inner wall of the water-dividing baffle. From top to bottom, it includes a first baffle tooth, a second baffle tooth, and a third baffle tooth spaced apart in sequence. The height of the first baffle tooth is less than the height of the second baffle tooth. The direction of the third baffle tooth is opposite to the direction of the first baffle tooth and the second baffle tooth and is higher than the height of the second baffle tooth. The angle α between the axis of the mounting groove and the axis of the nozzle structure is 45 to 65 degrees, and the spray area of ​​the far-spray nozzle is within a ring range of 3 to 11 meters. The angle β between the water-dividing baffle and the axis of the nozzle structure after opening is 38 to -58 degrees. The first baffle tooth has a right-angled triangular cross-section with its right-angled side facing upwards, and the hypotenuse of the third baffle tooth faces the hypotenuse of the second baffle tooth. The distance from the right-angled side of the first baffle tooth to the top wall of the hinge end is 1 / 3 of the total length of the water-dividing baffle, and the distance from the right-angled side of the second baffle tooth to the top wall of the hinge end is 2 / 3 of the total length of the water-dividing baffle. The height of the first baffle tooth is 1 / 3 of the height of the third baffle tooth, and the height of the second baffle tooth is 2 / 3 of the height of the third baffle tooth, so that the spray radius of the near-spray nozzle is fully covered within 4 meters. Detailed diagrams of this nozzle structure can be found in the attached drawings of the aforementioned rotary irrigation device and will not be repeated here.

Claims

1. A concealed rotary sprinkler irrigation device that provides uniform spraying and prevents clogging, characterized in that: The device includes a telescopic pipe connector, a cylindrical body, a flow guide plate, a rotating structure, a nozzle connector, and a nozzle structure. The telescopic pipe connector, the cylindrical body, the nozzle connector, and the nozzle structure form a water flow channel. The rotating structure is connected below the nozzle connector, and the flow guide plate is located below the rotating structure. The nozzle structure is connected to the upper end of the nozzle connector. The nozzle structure includes a nozzle body, a near-spray nozzle, and a far-spray nozzle. The cylindrical body is located between the telescopic pipe connector and the nozzle structure. The far-spray nozzle includes a water outlet plate located on the side wall of the nozzle body. The outside of the water outlet plate is covered with an openable diaphragm. The nozzle body is fixed outside the diaphragm. When water is sprayed, the water flows through the flow guide plate and drives the rotating structure... The rotating structure drives the nozzle connector and nozzle body to rotate, and the water flow pushes open the diaphragm petals and sprays out from the nozzle body. When the spraying ends, the diaphragm petals return to their original position and cover the water outlet plate to prevent debris from entering the nozzle body's cavity. This near-spray nozzle compensates for areas that the far-spray nozzle cannot reach within its short-range spraying range. The far-spray nozzle is located on the upper pentagonal pyramidal sidewall of the nozzle body. The water outlet plate is integrally formed with the nozzle body, and an installation groove is formed on the outer side of the water outlet plate. The water outlet plate has several evenly spaced water outlet holes. The diaphragm is made of soft rubber and is cut with rice-shaped petals. The nozzle body is fixed to the sidewall of the installation groove, and the bottom wall of the nozzle body presses against the outer ring of the diaphragm. The near-spray nozzle includes a long, narrow mounting groove on the pentagonal pyramidal sidewall of the nozzle body. A strip-shaped water-dividing baffle is hinged to the upper sidewall of the mounting groove. An opening is provided in the bottom plate of the mounting groove. The inner wall of the water-dividing baffle is stepped. The bottom wall of the mounting groove matches the stepped inner wall of the water-dividing baffle. The water-dividing baffle includes a first baffle tooth, a second baffle tooth, and a third baffle tooth spaced apart from top to bottom. The height of the first baffle tooth is less than the height of the second baffle tooth. The direction of the third baffle tooth is opposite to the direction of the first and second baffle teeth and is higher than the height of the second baffle tooth. When the near-spray nozzle sprays water, the water-dividing baffle is opened by the water pressure inside the nozzle, exposing the spray hole for spraying. When spraying is completed, the water-dividing baffle closes the mounting groove under the action of gravity to prevent debris from entering the cavity of the nozzle body. The angle α between the axis of the mounting groove and the axis of the nozzle structure is 45 to 65 degrees; the angle β between the water-dividing baffle and the axis of the nozzle structure after the water-dividing baffle is opened is 38 to 58 degrees; the cross-section of the first baffle tooth is a right-angled triangle, with its right-angled side facing the top, and the hypotenuse of the third baffle tooth facing the hypotenuse of the second baffle tooth. The distance from the right-angled side of the first baffle tooth to the top wall of the hinge end is 1 / 3 of the total length of the water-dividing baffle, and the distance from the right-angled side of the second baffle tooth to the top wall of the hinge end is 2 / 3 of the total length of the water-dividing baffle. The height of the first baffle tooth is 1 / 3 of the height of the third baffle tooth, and the height of the second baffle tooth is 2 / 3 of the height of the third baffle tooth.

2. The concealed rotary sprinkler irrigation device with uniform spraying and anti-clogging properties according to claim 1, characterized in that: The outer wall of the water outlet plate has a positioning protrusion, the outer ring of the diaphragm has a positioning hole, the diaphragm is fitted onto the positioning protrusion through the positioning hole, the bottom wall of the nozzle body has an insertion hole, the insertion hole is inserted into the positioning protrusion, the nozzle body is interference-fitted with the side wall of the mounting groove; and / or the nozzle body includes a tube, and several dispersion ribs are spaced around the inner wall of the tube, with a gap between the bottom wall of the dispersion ribs and the diaphragm.

3. The concealed rotary sprinkler irrigation device with uniform spraying and anti-clogging properties according to claim 1, characterized in that: The telescopic pipe connector includes an upper large-diameter pipe and a lower small-diameter pipe. The upper large-diameter pipe has an internal thread, and the lower small-diameter pipe has an external thread. The lower end of the cylinder is screwed to the internal thread of the telescopic pipe connector. A guide plate is installed at the lower end of the cavity of the cylinder. The upper end of the cylinder is Z-shaped and stepped, located below the nozzle body. An annular groove is provided in the vertical pipe wall of the nozzle body. A spring is placed in the annular groove, and a wear-resistant pad A is sealed below the spring. A wear-resistant pad B is provided at the outer step of the upper end of the cylinder, with the gap of the wear-resistant pad A aligned. A rotary seal is provided between the upper end of the cylinder and the nozzle; and / or the rotary structure includes an impeller and a planetary gear reducer, the impeller being connected to the input shaft of the planetary gear reducer, the output shaft of the planetary gear reducer being connected to the nozzle connector, the impeller being located above the guide plate, the impeller and the planetary gear reducer being located in the cylinder, the upper end of the nozzle connector extending out of the upper opening of the cylinder, the upper end of the nozzle connector having an external thread section, which is threadedly connected to the nozzle body of the nozzle structure, and the nozzle connector having a channel connecting the cylinder and the nozzle.

4. A nozzle structure, characterized in that: The device includes a nozzle body, a near-spray nozzle, and a far-spray nozzle. The far-spray nozzle includes a water outlet plate located on the nozzle body. The outer side of the water outlet plate is covered with an openable diaphragm. The nozzle body is fixed to the outer side of the diaphragm. When water is sprayed, the diaphragm flaps open, and water flows out from the nozzle body. When spraying ends, the diaphragm flaps return to their original position, covering the water outlet plate to prevent debris from entering the nozzle body's orifice. The far-spray nozzle is located on the upper pentagonal pyramidal sidewall of the nozzle body. The water outlet plate is integrally formed with the nozzle body, and a mounting groove is formed on the outer side of the water outlet plate. The water outlet plate has several evenly spaced water outlet holes. The diaphragm is made of soft rubber and cut with rice-shaped flaps. A positioning protrusion is convex on the outer wall of the water outlet plate, and a positioning hole is provided on the outer ring of the diaphragm. The diaphragm fits onto the positioning protrusion through the positioning hole. The nozzle body has an insertion hole on its bottom wall, which is inserted into a positioning protrusion. The nozzle body is interference-fitted with the side wall of the mounting groove, and / or the nozzle body includes a tube, with several dispersing ribs spaced in a ring on the inner wall of the tube. A gap is left between the bottom wall of the dispersing ribs and the diaphragm. The near-spray nozzle includes a near-spray mounting groove opened on the pentagonal pyramidal side wall of the nozzle body. A strip-shaped water-dividing baffle is hinged to the upper side wall of the mounting groove. An opening is provided on the bottom plate of the mounting groove. The inner wall of the water-dividing baffle is stepped. The bottom wall of the mounting groove matches the stepped inner wall of the water-dividing baffle. From top to bottom, it includes a first baffle tooth, a second baffle tooth, and a third baffle tooth spaced apart in sequence. The height of the first baffle tooth is less than the height of the second baffle tooth. The direction of the third baffle tooth is opposite to the direction of the first baffle tooth and the second baffle tooth and is higher than the height of the second baffle tooth.

5. The nozzle structure according to claim 4, characterized in that: The angle α between the axis of the mounting groove and the axis of the nozzle structure is 45 to 65 degrees; the angle β between the water-dividing baffle and the axis of the nozzle structure after the water-dividing baffle is opened is 38 to 58 degrees; the cross-section of the first baffle tooth is a right-angled triangle, with its right-angled side facing the top, and the hypotenuse of the third baffle tooth facing the hypotenuse of the second baffle tooth. The distance from the right-angled side of the first baffle tooth to the top wall of the hinge end is 1 / 3 of the total length of the water-dividing baffle, and the distance from the right-angled side of the second baffle tooth to the top wall of the hinge end is 2 / 3 of the total length of the water-dividing baffle. The height of the first baffle tooth is 1 / 3 of the height of the third baffle tooth, and the height of the second baffle tooth is 2 / 3 of the height of the third baffle tooth.

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