Agricultural water-saving irrigation equipment

Abstract

The invention relates to the technical field of agricultural irrigation, in particular to agricultural water-saving irrigation equipment which comprises a water supply net pipe and an irrigation head arranged on the water supply net pipe, the irrigation head comprises an outer main pipe, an inner main pipe is arranged in the outer main pipe in the axial direction of the outer main pipe, and a water wheel is arranged on the periphery of the lower end of the inner main pipe; the multiple jet pipes are evenly arranged around the upper end of the inner main pipe, the lower ends of the jet pipes are rotationally connected with the outer wall of the inner main pipe, and the jet pipes communicate with the inner main pipe through hoses; the jet range adjuster comprises a jet orifice adjusting sleeve, a plurality of jet orifices are formed in the side wall of the side, away from the inner main pipe, of the upper end of the jet pipe, and the jet orifice adjusting sleeve is used for adjusting the number of the jet orifices, capable of discharging water, in the jet pipe. According to the agricultural water-saving irrigation equipment, the number of the jet orifices can be adjusted when the jet pipe is located at the corner of the corresponding square irrigation area in the revolution state, and comprehensive coverage of the irrigation area is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural irrigation, and particularly to an agricultural water-saving irrigation device. Background Art

[0002] Agricultural irrigation plays a crucial role in crop production. It ensures that crops receive sufficient and timely water, which is the basis for improving the growth rate and yield of crops. With the continuous development of agricultural irrigation technology, the traditional method of watering with hoses has gradually been replaced by fixed-point pre-buried irrigation pipe networks and sprinkler heads installed on the pipe networks. However, currently, the sprinkler head structures of most irrigation devices are relatively simple and have single functions. Once installed, the spraying angle is in a fixed state, and the spraying range coverage is small. Although some sprinkler heads of irrigation devices can be driven to rotate through corresponding structures to increase the spraying range coverage, generally speaking, when it comes to agricultural planting, the planting area is often divided into multiple square grids, and each sprinkler head is responsible for the irrigation of one grid. If the sprinkler head only rotates in a simple circular motion, it is very difficult to irrigate the crops at the corners of the grid. If the circular coverage area is increased, the irrigation amount of the crops at the straight-edge junction of two adjacent grids will be much greater than that of the crops at the corners, making it difficult to achieve relatively uniform irrigation. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides an agricultural water-saving irrigation device, which solves the problem of poor irrigation uniformity for square grids in the prior art.

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0005] An agricultural water-saving irrigation device includes a water supply network pipe and an irrigation head provided on the water supply network pipe. The irrigation head includes:

[0006] An outer main pipe, an inner main pipe is arranged along the axial direction inside the outer main pipe. The lower end of the inner main pipe is communicated with the inside of the outer main pipe, and a water wheel is arranged on the outer periphery of the lower end of the inner main pipe to drive the inner main pipe to rotate;

[0007] Jet pipes, a plurality of the jet pipes are evenly arranged around the upper end of the inner main pipe and are communicated with the inner main pipe;

[0008] Jet range regulator, the jet range regulator includes a jet orifice adjusting sleeve. A plurality of jet orifices are provided on the side wall of the upper end of the jet pipe away from the inner main pipe. The jet orifice adjusting sleeve is slidably sleeved on the upper end of the jet pipe for adjusting the number of jet orifices on the jet pipe through which water can flow along its axial direction. A sleeve moving structure is provided on the inner wall of the outer main pipe. The outer main pipe has four range adjusting zones arranged in a circumferential array with its axis as the center. When the jet pipe moves into the range adjusting zone, the sleeve moving structure controls the jet orifice adjusting sleeve to increase the number of jet orifices through which water can flow. When the jet pipe leaves the range adjusting zone, the sleeve moving structure controls the adjusting sleeve to reduce the number of jet orifices through which water can flow.

[0009] Preferably, the sleeve moving structure includes:

[0010] A pressing plate, the pressing plate is provided at the lower end of the jet orifice adjusting sleeve;

[0011] A lower pushing plate, lower pushing plates are respectively provided on the inner wall of the outer main pipe corresponding to the range adjusting zones, and the lower pushing plate is located below the pressing plate. The lower pushing plate is arranged from low to high along the rotation direction of the inner main pipe. When the jet pipe enters the range adjusting zone, the lower side of the lower pushing plate contacts the pressing plate first, and as the lower pushing plate rises, it pushes the pressing plate upward;

[0012] An upper pushing plate, the upper pushing plate is provided between two adjacent lower pushing plates on the inner wall of the outer main pipe corresponding to the non-range adjusting zones, and the upper pushing plate is located above the pressing plate. The upper pushing plate is arranged from high to low along the rotation direction of the inner main pipe. When the jet pipe leaves the range adjusting zone, the upper side of the upper pushing plate contacts the pressing plate first, and as the upper pushing plate descends, it pushes the pressing plate downward.

[0013] Preferably, the jet orifice includes a main jet orifice and auxiliary jet orifices. A plurality of auxiliary jet orifices are respectively provided on the upper and lower sides of the main jet orifice. The diameter of the main jet orifice is larger than that of the auxiliary jet orifices. A main hole position corresponding to the main jet orifice is provided in the middle of the jet orifice adjusting sleeve. Auxiliary hole positions corresponding to the auxiliary jet orifices are respectively provided at the upper and lower ends of the jet orifice adjusting sleeve. When the jet orifice adjusting sleeve slides to the highest position, the main jet orifice is exposed from the main hole position, and the auxiliary jet orifices are exposed from the auxiliary hole positions. When the jet orifice adjusting sleeve slides to the lowest position, the main jet orifice is exposed from the main hole position, and the auxiliary jet orifices are closed by the jet orifice adjusting sleeve.

[0014] Preferably, the lower end of the jet pipe is rotatably connected to the outer wall of the inner main pipe, and the jet pipe and the inner main pipe are communicated through a hose. The irrigation head further includes:

[0015] Jet angle regulator, the jet angle regulator is annular and is arranged at the upper end of the outer main pipe. The inner wall of the jet angle regulator is inclined, and the middle through slot of the jet angle regulator is larger at the top and smaller at the bottom. A plurality of convex areas and concave areas are arranged at intervals along the circumferential direction of the inner wall of the angle regulator, and the jet pipe is in contact with the convex area or the concave area.

[0016] Preferably, a groove is provided at the lower end of the jet angle regulator. The groove at the lower end of the jet angle regulator is sleeved on the upper end of the outer main pipe, and the groove at the lower end of the jet angle regulator is rotatably connected to the upper end of the outer main pipe. The outer side wall of the groove extends downward to form an extension part. The irrigation head further includes a transmission assembly for driving the jet angle regulator to rotate. The transmission assembly includes:

[0017] Internal gear, the internal gear is arranged inside the extension part, and a relief hole corresponding to the position of the internal gear is opened on the side wall of the outer main pipe;

[0018] External gear, the external gear is arranged outside the inner main pipe;

[0019] Transmission gear, the transmission gear meshes with the internal gear and the external gear respectively.

[0020] Preferably, a support partition is provided in the middle of the inner side of the outer main pipe. The inner main pipe passes through the support partition and is hermetically and rotatably connected to the partition. The transmission gear is arranged on the top of the support partition through a rotating shaft.

[0021] Preferably, a part of the inner main pipe below the support partition is a narrow part, and a first return pipe communicating with the inner main pipe is provided on the side wall of the narrow part.

[0022] Preferably, a water receiving hopper is provided on the outer side of the lower end of the outer main pipe. A Venturi tube is rotatably connected to the lower end of the inner main pipe. A second return pipe communicating with the Venturi tube is provided on the side wall of the Venturi tube, and the other end of the second return pipe passes through the outer main pipe and extends to the inner bottom of the water receiving hopper.

[0023] The beneficial effects of the present invention are:

[0024] This agricultural water-saving irrigation equipment can enable the water flow to drive the water wheel to drive the inner main pipe to rotate, so as to achieve circular irrigation, achieve the purpose of large-area and uniform irrigation. And when corresponding to the corners of the square irrigation area, it can adjust the number of jet ports to achieve full coverage of the square irrigation area, so that the crops located at the corners of the square irrigation area can also receive uniform irrigation, thereby improving the plantability of the square irrigation area, improving the soil utilization rate and the crop survival rate. Description of the drawings

[0025] Figure 1 It is a schematic diagram of the water supply network pipe and the irrigation head corresponding to the square irrigation area in the embodiment of the present invention;

[0026] Figure 2 is a schematic diagram of an axial cross section of an irrigation head according to an embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of a partial sleeve moving structure on an outer main pipe in an embodiment of the present invention;

[0028] Figure 4 It is a schematic diagram of the jet port on the jet tube and the jet port regulating sleeve sliding from the highest point to the lowest point in the embodiment of the present invention;

[0029] Figure 5 Schematic diagram of a top view of a spray angle adjuster in an embodiment of the present invention;

[0030] Figure 6 for Figure 2 An enlarged schematic diagram of part A in the middle.

[0031] Figure numerals: 1, water supply network pipe, 2, square irrigation area, 3, irrigation head, 4, outer main pipe, 5, inner main pipe, 6, water wheel, 7, jet pipe, 8, jet port adjustment sleeve, 9, jet port, 10, range adjustment area, 11, pressure plate, 12, lower push plate, 13, upper push plate, 14, main jet port, 15, secondary jet port, 16, main hole position, 17, secondary hole position, 18, hose, 19, spray angle adjuster, 20, raised area, 21, recessed area, 22, groove, 23, extension part, 24, inner gear, 25, make way hole, 26, outer gear, 27, transmission gear, 28, support partition, 29, narrow part, 30, return pipe one, 31, water receiving bucket, 32, venturi tube, 33, return pipe two. DETAILED DESCRIPTION

[0032] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0033] Example

[0034] When irrigating large agricultural planting areas, fixed-point pre-buried irrigation pipe networks and sprinklers installed on the pipe networks are usually used. When irrigating, the sprinklers can be driven to rotate by corresponding mechanisms to achieve circular irrigation coverage and increase the irrigation area. However, in order to maximize the use of land, crops are often not planted in independent circular areas, but in patches, and the planting areas are divided into several square areas for zoned irrigation. This results in that during irrigation, the corners of the square areas are often not effectively or sufficiently irrigated. If the diameter of the circular irrigation of the sprinkler is increased, although it can cover the corners of the square area, it will cause repeated irrigation of sprinklers on both sides of the straight edge of the square area, resulting in uneven irrigation. Excessive irrigation can easily lead to excessive waterlogging, which will also have an adverse effect on the normal growth of crops.

[0035] To solve the above irrigation problem in a square area, this embodiment provides an agricultural water-saving irrigation device, including a water supply network pipe 1 and irrigation heads 3 provided on the water supply network pipe 1. The irrigation head 3 includes:

[0036] An outer main pipe 4, an inner main pipe 5 is provided along its axial direction inside the outer main pipe 4. The lower end of the inner main pipe 5 is communicated with the inside of the outer main pipe 4. A water wheel 6 is provided on the outer periphery of the lower end of the inner main pipe 5 for driving the inner main pipe 5 to rotate;

[0037] Jet pipes 7, a plurality of the jet pipes 7 are evenly arranged around the upper end of the inner main pipe 5 and communicated with the inner main pipe 5;

[0038] A jet range regulator, the jet range regulator includes a jet orifice adjusting sleeve 8. A plurality of jet orifices 9 are opened on the side wall of the upper end of the jet pipe 7 away from the inner main pipe 5. The jet orifice adjusting sleeve 8 is slidably sleeved on the upper end of the jet pipe 7 for adjusting the number of jet orifices 9 on the jet pipe 7 that can discharge water along its axial direction. A sleeve moving structure is provided on the inner wall of the outer main pipe 4. The outer main pipe 4 has four range adjusting areas 10 arranged in a circumferential array with its axis as the center. When the jet pipe 7 moves into the range adjusting area 10, the sleeve moving structure controls the jet orifice adjusting sleeve 8 to increase the number of jet orifices 9 that can discharge water. When the jet pipe 7 leaves the range adjusting area 10, the sleeve moving structure controls the adjusting sleeve to reduce the number of jet orifices 9 that can discharge water.

[0039] When the agricultural water-saving irrigation device is irrigating, water flows through the water supply network pipe 1 and is delivered to the outer main pipes 4 of each irrigation head 3. The water flow impacts the water wheel 6 to drive the inner main pipe 5 to rotate. The rotation of the inner main pipe 5 drives the jet pipes 7 thereon to rotate to achieve uniform irrigation within a circular area. The four corners of the outer main pipe 4 corresponding to the square irrigation area 2 are range adjusting areas 10. The jet orifice adjusting sleeve 8 is slidably arranged on the jet pipe 7. By sliding up and down on the jet pipe 7, the number of jet orifices 9 on the jet pipe 7 that can discharge water is adjusted. When the jet pipe 7 turns into the range adjusting area 10, more jet orifices 9 are used for irrigation to cover the corners of the square irrigation area 2. When the jet pipe 7 turns away from the range adjusting area 10, some jet orifices 9 are closed to avoid excessive irrigation of the straight-edge areas of the square irrigation area 2, so as to achieve the purpose of as uniform irrigation as possible for the entire square irrigation area 2.

[0040] Of course, in order to install the irrigation head 3 at a suitable height, the bottom end of the outer main pipe 4 can be threadedly connected with a section of installation pipe to connect to the water supply network pipe 1.

[0041] The up and down sliding of the jet orifice adjusting sleeve 8 can be driven by a linear motor. Of course, it can also be realized by combining the rotation of the jet pipe 7 with a corresponding guide rail structure. For example, in one embodiment, the sleeve moving structure includes:

[0042] A pressing plate 11, the pressing plate 11 is arranged at the lower end of the jet orifice adjusting sleeve 8;

[0043] A lower push plate 12, lower push plates 12 are respectively arranged on the inner wall of the outer main pipe 4 corresponding to the range adjusting area 10, and the lower push plate 12 is located below the pressing plate 11. The lower push plate 12 is arranged from low to high along the rotation direction of the inner main pipe 5. When the jet pipe 7 enters the range adjusting area 10, the lower side of the lower push plate 12 contacts the pressing plate 11 first, and as the lower push plate 12 rises, the pressing plate 11 is pushed upward;

[0044] An upper push plate 13, the upper push plate 13 is arranged between two adjacent lower push plates 12 on the inner wall of the outer main pipe 4 corresponding to the non-range adjusting area 10, and the upper push plate 13 is located above the pressing plate 11. The upper push plate 13 is arranged from high to low along the rotation direction of the inner main pipe 5. When the jet pipe 7 leaves the range adjusting area 10, the higher side of the upper push plate 13 contacts the pressing plate 11 first, and as the upper push plate 13 descends, the pressing plate 11 is pushed downward.

[0045] When the jet pipe 7 rotates, the pressing plate 11 is cyclically pushed upward and downward by the lower push plate 12 and the upper push plate 13, so that the pressing plate 11 drives the jet orifice adjusting sleeve 8 to reciprocate up and down on the jet pipe 7. Specifically, the lower push plate 12 can be arranged on the side of the range adjusting area 10 opposite to the rotation direction of the jet pipe 7, and the upper push plate 13 is arranged on the side of the range adjusting area 10 in the same direction as the rotation direction of the jet pipe 7. The two ends of the upper push plate 13 have an overlapping area with the two side lower push plates 12 in the vertical direction for better connection between the lower push plate 12 and the upper push plate 13 of the pressing plate 11. Through the cooperation of the lower push plate 12 and the upper push plate 13 with the pressing plate 11, the rotation of the jet pipe 7 can be utilized to realize the driving of the up and down sliding of the jet orifice adjusting sleeve 8. This pure mechanical driving avoids the use of electronic components and makes the irrigation process safer.

[0046] Since the jet tube 7 has more jet ports 9 for irrigation when entering the range adjustment area 10, the irrigation range may overlap when the jet tube 7 passes through the same range adjustment area 10 twice. In order to make the irrigation amount of the overlapping area as close as possible to the irrigation amount of other areas, in one embodiment, the jet port 9 includes a main jet port 14 and a secondary jet port 15, and a plurality of secondary jet ports 15 are respectively provided on the upper and lower sides of the main jet port 14. The caliber of the main jet port 14 is larger than that of the secondary jet port 15. A main hole position 16 corresponding to the main jet port 14 is provided in the middle of the jet port regulating sleeve 8, and secondary hole positions 17 corresponding to the secondary jet port 15 are respectively provided at the upper and lower ends of the jet port regulating sleeve 8. When the jet port regulating sleeve 8 slides to the highest position, the main jet port 14 is exposed from the main hole position 16, and the secondary jet port 15 is exposed from the secondary hole position 17. When the jet port regulating sleeve 8 slides to the lowest position, the main jet port 14 is exposed from the main hole position 16, and the secondary jet port 15 is closed by the jet port regulating sleeve 8.

[0047] By arranging secondary jet ports 15 with smaller calibers on the upper and lower sides of the main jet port 14, on the one hand, the irrigation range of the jet tube 7 in the range adjustment area 10 is increased, and on the other hand, the secondary jet ports 15 with smaller calibers have smaller flow rates, which can avoid excessive irrigation water in the overlapping area and make the irrigation more uniform. Compared with the main jet port 14, the main hole position 16 has a large enough area, so that the jet port regulating sleeve 8 will not cover the main jet port 14 when it moves up and down, and when the jet tube 7 enters the range adjustment area 10, the secondary hole position 17 of the jet port regulating sleeve 8 gradually moves to make way for the secondary jet port 15, so that the coverage range of the jet tube 7 gradually increases when entering the range adjustment area 10, until the jet tube 7 is facing the corner of the square irrigation area 2, that is, the lower push plate 12 reaches the maximum height at this time, and the upper push plate 13 also reaches the maximum height at this time, and then the upper push plate 13 pushes the pressing plate 11 downward, the secondary hole position 17 gradually staggers with the secondary jet port 15, the jet port regulating sleeve 8 gradually closes the secondary jet port 15, and the coverage range of the jet tube 7 gradually decreases.

[0048] In order to make the angle between the jet tube 7 and the inner main pipe 5 variable during the movement, so as to form a wave-shaped operation during the rotation process, and further enhance the uniformity of irrigation, in one embodiment, the lower end of the jet tube 7 is rotatably connected to the outer wall of the inner main pipe 5, and the jet tube 7 and the inner main pipe 5 are connected through a hose 18, and the irrigation head 3 also includes:

[0049] The jet angle regulator 19 is annular and is arranged at the upper end of the outer main pipe 4. The inner wall of the jet angle regulator 19 is inclined, and the middle through groove of the jet angle regulator 19 is larger at the top and smaller at the bottom. A plurality of convex areas 20 and concave areas 21 are arranged at intervals along the circumferential direction of the inner wall of the angle regulator, and the jet pipe 7 is in contact with the convex area 20 or the concave area 21.

[0050] When the jet pipe 7 rotates, due to the different supporting positions of the convex area 20 and the concave area 21, it can rotate within a certain angle range around the rotation axis rotatably connected to the inner main pipe 5, that is, when the jet pipe 7 revolves around the axis of the inner main pipe 5 in the horizontal direction, it can also rotate at a certain angle in the vertical direction, so that the irrigation path forms a wavy change, and both the near and far areas of the irrigation head 3 can be covered.

[0051] In order to prevent the wavy irrigation path from remaining constant and further improve the uniformity of irrigation, in one embodiment, a groove 22 is provided at the lower end of the jet angle regulator 19. The groove 22 at the lower end of the jet angle regulator 19 is sleeved on the upper end of the outer main pipe 4, and the groove 22 at the lower end of the jet angle regulator 19 is rotatably connected to the upper end of the outer main pipe 4. The outer side wall of the groove 22 extends downward to form an extension 23. The irrigation head 3 further includes a transmission assembly for driving the jet angle regulator 19 to rotate. The transmission assembly includes:

[0052] An internal gear 24 is arranged inside the extension 23, and a relief hole 25 corresponding to the position of the internal gear 24 is formed on the side wall of the outer main pipe 4;

[0053] An external gear 26 is arranged outside the inner main pipe 5;

[0054] A transmission gear 27 is meshed with the internal gear 24 and the external gear 26 respectively.

[0055] The jet angle regulator 19 is rotatably connected to the upper end of the outer main pipe 4 through the groove 22, and the jet angle regulator 19 is coaxially connected to the outer main pipe 4 and can rotate around its axis. When the inner main pipe 5 rotates, the external gear 26 drives the internal gear 24 to rotate through the transmission gear 27, thereby driving the jet angle regulator 19 to rotate. When the jet angle regulator 19 rotates, the positions of the convex area 20 and the concave area 21 can be changed, so as to prevent the wavy irrigation path of the jet orifice 9 on the jet pipe 7 from being single and unchanged.

[0056] Although adding a transmission component can avoid the problem of a single wavy irrigation path, in order to prevent the wavy irrigation path of the jet orifice 9 from repeating a previous path after rotating a small number of turns, and the irrigation width of the jet orifice 9 is not sufficient to cover the area between adjacent two circles of irrigation paths, which will still lead to the problem of uneven irrigation, there are certain requirements for the transmission ratio between the external gear 26 and the internal gear 24, and it is preferably to satisfy that the transmission ratio is not 1:N2 or N2:1.

[0057] In one embodiment, for facilitating the installation and rotation of the inner main pipe 5, a support partition 28 is provided in the middle of the inner side of the outer main pipe 4. The inner main pipe 5 passes through the support partition 28 and is rotatably connected to the partition in a sealed manner. The transmission gear 27 is arranged on the top of the support partition 28 through a rotating shaft.

[0058] In one embodiment, a part of the inner main pipe 5 below the support partition 28 is a narrow part 29. A first return pipe 30 communicating with the inner main pipe 5 is provided on the side wall of the narrow part 29. When water flows into the narrow part 29, the flow rate will increase, thereby forming a negative pressure relative to the outer main pipe 4. Then, the water in the outer main pipe 4 is sucked into the inner main pipe 5 through the first return pipe 30, so as to form an upward flow of water in the outer main pipe 4, which can impact the water wheel 6 to drive the inner main pipe 5 to rotate.

[0059] During irrigation, a small amount of water may drip around the irrigation head 3 from the jet orifice 9. If not collected, it will cause waterlogging of the crops around the irrigation head 3. Therefore, in one embodiment, a water receiving hopper 31 is provided on the outer side of the lower end of the outer main pipe 4. A Venturi tube 32 is rotatably connected to the lower end of the inner main pipe 5. A second return pipe 33 communicating with the Venturi tube 32 is provided on the side wall of the Venturi tube 32. The other end of the second return pipe 33 passes through the outer main pipe 4 and extends to the inner bottom of the water receiving hopper 31.

[0060] After water flows into the Venturi tube 32, the flow rate increases and the pressure decreases. The pressure at the end of the second return pipe 33 connected to the Venturi tube 32 is lower than that at the end in the water receiving hopper 31. The second return pipe 33 will suck the water in the water receiving hopper 31 into the inner main pipe 5 for re-irrigation.

[0061] The above embodiments only represent the specific implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. An agricultural water-saving irrigation device, comprising a water supply network pipe and irrigation heads arranged on the water supply network pipe, characterized in that, The irrigation head includes: An outer main pipe, an inner main pipe is arranged axially inside the outer main pipe, the lower end of the inner main pipe communicates with the inside of the outer main pipe, and a water wheel is arranged on the outer periphery of the lower end of the inner main pipe to drive the inner main pipe to rotate; Jet pipes, a plurality of the jet pipes are evenly arranged around the upper end of the inner main pipe and communicate with the inner main pipe; A jet range regulator, the jet range regulator includes a jet orifice adjusting sleeve, a plurality of jet orifices are opened on the side wall of the upper end of the jet pipe away from the inner main pipe, the jet orifice adjusting sleeve is slidably sleeved on the upper end of the jet pipe to adjust the number of jet orifices available for water outlet along the axial direction of the jet pipe, a sleeve moving structure is arranged on the inner wall of the outer main pipe, the outer main pipe has four range adjusting areas arranged in a circumferential array with its axis as the center, when the jet pipe moves into the range adjusting area, the sleeve moving structure controls the jet orifice adjusting sleeve to increase the number of jet orifices available for water outlet, and when the jet pipe leaves the range adjusting area, the sleeve moving structure controls the adjusting sleeve to reduce the number of jet orifices available for water outlet.

2. The agricultural water-saving irrigation equipment according to claim 1, characterized in that, The sleeve moving structure includes: A pressing plate, the pressing plate is arranged at the lower end of the jet orifice adjusting sleeve; A lower pushing plate, lower pushing plates are respectively arranged on the inner wall of the outer main pipe corresponding to the range adjusting areas, and the lower pushing plates are located below the pressing plate, the lower pushing plates are arranged from low to high along the rotation direction of the inner main pipe, when the jet pipe enters the range adjusting area, the lower side of the lower pushing plate contacts the pressing plate first, and as the lower pushing plate rises, the pressing plate is pushed upward; An upper pushing plate, the upper pushing plate is arranged between adjacent lower pushing plates on the inner wall of the outer main pipe corresponding to the non-range adjusting areas, and the upper pushing plate is located above the pressing plate, the upper pushing plate is arranged from high to low along the rotation direction of the inner main pipe, when the jet pipe leaves the range adjusting area, the higher side of the upper pushing plate contacts the pressing plate first, and as the upper pushing plate drops, the pressing plate is pushed downward.

3. The agricultural water-saving irrigation equipment according to claim 2, wherein The jet orifice includes a main jet orifice and auxiliary jet orifices, a plurality of auxiliary jet orifices are respectively arranged on the upper and lower sides of the main jet orifice, the diameter of the main jet orifice is larger than that of the auxiliary jet orifices, a main hole position corresponding to the main jet orifice is arranged in the middle of the jet orifice adjusting sleeve, and auxiliary hole positions corresponding to the auxiliary jet orifices are respectively arranged at the upper and lower ends of the jet orifice adjusting sleeve. When the jet orifice adjusting sleeve slides to the highest position, the main jet orifice is exposed from the main hole position, and the auxiliary jet orifices are exposed from the auxiliary hole positions. When the jet orifice adjusting sleeve slides to the lowest position, the main jet orifice is exposed from the main hole position, and the auxiliary jet orifices are closed by the jet orifice adjusting sleeve.

4. The agricultural water-saving irrigation equipment according to claim 3, characterized in that, The lower end of the jet pipe is rotatably connected to the outer wall of the inner main pipe, and the jet pipe and the inner main pipe are communicated through a hose. The irrigation head further includes: A jet angle regulator, the jet angle regulator is annular and arranged at the upper end of the outer main pipe, the inner wall of the jet angle regulator is inclined and the middle through groove of the jet angle regulator is larger at the top and smaller at the bottom, and a plurality of convex areas and concave areas are arranged at intervals along the circumferential direction of the inner wall of the angle regulator, and the jet pipe contacts the convex areas or concave areas.

5. The agricultural water-saving irrigation equipment according to claim 4, characterized in that, The lower end of the spray angle regulator is provided with a groove. The groove at the lower end of the spray angle regulator is sleeved on the upper end of the outer main pipe, and the groove at the lower end of the spray angle regulator is rotatably connected to the upper end of the outer main pipe. The outer side wall of the groove extends downward to form an extension part. The irrigation head further includes a transmission assembly for driving the spray angle regulator to rotate. The transmission assembly includes: An internal gear, which is arranged inside the extension part, and a relief hole corresponding to the position of the internal gear is formed on the side wall of the outer main pipe; An external gear, which is arranged outside the inner main pipe; A transmission gear, which meshes with the internal gear and the external gear respectively.

6. The agricultural water-saving irrigation equipment according to claim 5, characterized in that, A support partition is arranged in the middle of the inner side of the outer main pipe. The inner main pipe passes through the support partition and is rotatably and sealingly connected to the partition. The transmission gear is arranged on the top of the support partition through a rotating shaft.

7. The agricultural water-saving irrigation equipment according to claim 6, characterized in that, A part of the inner main pipe below the support partition is a narrow part, and a first return pipe communicating with the inner main pipe is arranged on the side wall of the narrow part.

8. The agricultural water-saving irrigation equipment according to claim 7, characterized in that, A water receiving hopper is arranged on the outer side of the lower end of the outer main pipe. A venturi tube is rotatably connected to the lower end of the inner main pipe. A second return pipe communicating with the venturi tube is arranged on the side wall of the venturi tube. The other end of the second return pipe passes through the outer main pipe and extends to the inner bottom of the water receiving hopper.

Images