Rotary damper type sprinkler with high uniformity

Abstract

The present application relates to a kind of high spray irrigation uniformity of rotary damping type sprinkler, including support, damping structure, water distribution structure, spray disc and nozzle, damping structure is connected with the transmission mechanism for driving water distribution structure and nozzle asynchronous rotation with the rotary shaft of spray disc, the water distribution tooth of water distribution structure includes several kinds of tooth length gradually increasing, the nearest wetting circle radius of spray disc jet flow not impacting water distribution tooth is equal to the farthest wetting circle radius of spray disc jet flow impacting shortest tooth length water distribution tooth, the nearest wetting circle radius of spray disc jet flow impacting each level water distribution tooth is equal to the farthest wetting circle radius of spray disc jet flow impacting its secondary tooth length water distribution tooth, the number of each water distribution tooth is set according to the water amount distribution curve in the range of superposed entire wetting circle approaches level, simple structure, easy to disassemble and assemble, the combination of optimal water distribution structure and spray disc asynchronous rotation can significantly improve the irrigation uniformity, irrigation combination pitch can reach 1.8-1.9 times range, can save cost, maximum limit to improve crop yield.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of sprinkler irrigation equipment, and particularly relates to a rotary damping type sprinkler head with high sprinkler irrigation uniformity. BACKGROUND

[0002] The rotary damping type sprinkler head is a key component in agricultural sprinkler irrigation equipment, and is composed of a support, a damping structure arranged in the support, a water dispersing structure, a sprinkler disc and a nozzle. A rotating shaft is arranged in the support and connected with the damping structure and passes through the water dispersing structure and is connected with the sprinkler disc. Water flows along the nozzle and through the circular space flow channel of the sprinkler disc at a certain elevation angle. The driving torque generated by the water flow reaction force and the resistance torque exerted by the damping structure jointly act on the sprinkler disc to rotate the sprinkler disc around the axis of the rotating shaft in the support. The water jet sprayed by the rotating sprinkler disc space flow channel impacts on the water dispersing teeth of the intermittent water dispersing structure. The dispersing ability of the jet is improved to improve the sprinkler irrigation uniformity. However, the following problems still exist.

[0003] (1) The water dispersing teeth on the existing intermittent water dispersing structure are arranged at six positions at intervals of 60°. When the sprinkler head operates at a low working pressure, the position of the intermittent water dispersing structure does not change substantially, which causes the jet to be severely broken at the six positions with the water dispersing teeth, and the spraying effect of the sprinkler head is good. When the rotating sprinkler disc rotates to the positions without the water dispersing teeth, the jet sprayed from the outlet of the space flow channel can only be broken under the action of air resistance, air entrainment and its own gravity. The lower the working pressure, the worse the breaking effect, which ultimately leads to uneven distribution of water in the entire sprinkler irrigation area, affecting crop yield. In addition, when the sprinkler head operates at a normal working pressure, the position of the intermittent water dispersing structure changes slowly. In order to achieve high sprinkler irrigation uniformity, the sprinkler irrigation time will be too long, which affects the work efficiency and the amount of water sprinkled.

[0004] (2) The length and number of the water dispersing teeth on the existing intermittent water dispersing structure are not well designed. The combination of long teeth and short teeth in the water dispersing structure causes uneven distribution of water in the entire wetting circle of the sprinkler head. In order to achieve high sprinkler irrigation uniformity, the combined spacing of adjacent sprinkler heads is generally 1.2-1.4 times the range. Due to the short combined spacing, the number of sprinkler heads required in the sprinkler irrigation area increases, which increases the initial investment cost.

[0005] (3) The support adopts a split structure, and the damping structure is complex, which makes disassembly and assembly inconvenient, increases the cost, and is not conducive to the popularization and application of the rotary damping type sprinkler head. SUMMARY

[0006] The present application aims to solve at least one of the above technical problems, and provides a rotary damping type sprinkler with high irrigation uniformity, which is simple in structure and convenient to disassemble and assemble, and significantly improves irrigation uniformity and irrigation combination spacing by combining the optimized water distribution structure with asynchronous rotation of the sprinkler plate, thereby saving cost and maximizing crop yield.

[0007] The technical solution adopted by the present application to solve the technical problems is:

[0008] The rotary damping type sprinkler with high irrigation uniformity comprises a support, a damping structure, a water distribution structure, a sprinkler plate and a nozzle arranged in the support, the damping structure is connected with a rotating shaft connected with the sprinkler plate, the rotating shaft is connected with a transmission mechanism for driving the water distribution structure and the nozzle to rotate asynchronously, the water distribution structure comprises a plurality of water distribution teeth that can be impacted by the jet flow from the nozzle to the sprinkler plate, the plurality of water distribution teeth comprise a plurality of types with gradually increasing tooth lengths, the nearest wetting circle radius of the jet flow from the sprinkler plate that does not impact the water distribution teeth is equal to the farthest wetting circle radius of the jet flow from the sprinkler plate that impacts the water distribution teeth with the shortest tooth length, the nearest wetting circle radius of the jet flow from the sprinkler plate that impacts each type of water distribution teeth is equal to the farthest wetting circle radius of the jet flow from the sprinkler plate that impacts the water distribution teeth with the next tooth length, and the number of each type of water distribution teeth is set according to the water distribution curve in the entire wetting circle range so as to be close to horizontal.

[0009] The above sprinkler further comprises an integrated support structure including a damping box and a nozzle box, the damping structure is arranged in the damping box, the damping box is provided with a control spring for elastically supporting the rotating shaft, a plurality of connecting rods are arranged between the nozzle box and the damping box, the sprinkler plate is provided with a boss matched with the nozzle box, and the nozzle is arranged in the nozzle box.

[0010] Further, the nozzle box is connected with an adapter, the adapter is provided with a plurality of rectifier plates, the nozzle is provided with a tapered hole communicated with the adapter and the sprinkler plate, and the outlet diameter of the tapered hole is smaller than the inlet diameter of the sprinkler plate, so that the water flow speed increases when flowing out of the nozzle outlet, and the sprinkler plate is promoted to rotate around the axis of the rotating shaft under the action of the high-speed water flow.

[0011] The above sprinkler further comprises a damping structure including a damping disc and viscous damping grease, the damping disc is provided below a sealing plate connected with the support, the rotating shaft is connected with the damping disc through the sealing plate, and the viscous damping grease is filled in the gap between the damping disc and the support and the sealing plate.

[0012] The nozzle further comprises a gear bearing connected in the support, a transmission ratio of the gear bearing and the transmission mechanism is 0.05-0.5, the transmission mechanism comprises an external gear or an incomplete gear meshing with the internal gear of the gear bearing, and a plurality of water dispersing teeth are connected at the bottom of the internal gear of the gear bearing, so that the rotating speed of the water dispersing teeth is less than the rotating speed of the nozzle disc, the jet flow of the nozzle disc can impact the water dispersing teeth with different tooth lengths in each radial line during one irrigation operation, so that the water can be sprayed in the whole irrigation area and the water distribution in the whole irrigation area is consistent, and the problem that the position of the intermittent water dispersing structure does not change or changes slowly and the irrigation time is too long when the nozzle operates under normal working pressure is solved.

[0013] The nozzle further comprises a special-shaped space flow channel in the nozzle disc, an outlet cross-section bias angle β of the special-shaped space flow channel is greater than a middle cross-section bias angle α which is greater than an inlet cross-section bias angle, the special-shaped space flow channel with a non-circular outlet cross-section is used to replace the existing circular space flow channel, so that the nozzle has high irrigation uniformity under low pressure, and the rotating phenomenon of the nozzle disc under the action of the water flow flowing through the special-shaped space flow channel is promoted by the setting of the bias angle.

[0014] The nozzle further comprises that the horizontal distance from the water dispersing teeth to the outlet of the nozzle disc is 5-10 mm, and the horizontal distance is used to increase the range of the nozzle.

[0015] The nozzle further comprises that the water droplets are dispersed from the ground behind the water dispersing teeth due to the dispersion effect of the water dispersing teeth on the jet flow, so that the jet flow is not sprayed on the ground in a regular fan ring, and the determination of the farthest wetting circle radius is affected, therefore, a plurality of water dispersing teeth with gradually increasing tooth lengths are numbered from 1, and the farthest wetting circle radius R of the jet flow of the nozzle disc impacting the i-th water dispersing tooth is determined according to R = P0 * D / (P1 - P0) i In the formula, P0 represents the irrigation intensity (mm / h) of the farthest wetting circle radius when the jet flow of the nozzle disc does not impact the water dispersing teeth, P1 represents the irrigation intensity (mm / h) of the farthest wetting circle radius when the jet flow of the nozzle disc impacts the water dispersing teeth, D represents the horizontal distance from the test point to the rotating center of the nozzle, and h represents the precipitation depth (mm) of the test point. j j t1 represents the time (h) when the precipitation depth of the nozzle reaches h, and h represents the precipitation depth (mm) of the test point. j j D represents the horizontal distance from the test point to the rotating center of the nozzle.

[0016] Further, P0 is 0.7 mm / h, i is an integer and i≤5, so as to promote the water distribution uniformity in the whole wetting circle range and avoid the influence of too large i on the hydraulic performance.

[0017] Further, the tooth length of the i-th water dispersing tooth is adjusted according to P1 = P0 * (D + i * L) / h max ​​represents the maximum sprinkling intensity (mm / h) of the disc jet impacting the i-th kind of deflector, h k represents the precipitation depth (mm) of the k-th test point, t2 represents the time when the sprinkler precipitation depth reaches h k represents the time (h) taken, L i represents the radius of the nearest wetting circle of the disc jet impacting the i-th kind of deflector, R i+1 represents the radius of the farthest wetting circle of the disc jet impacting the i-th kind of deflector, D k represents the horizontal distance of the k-th test point from the center of rotation of the sprinkler, thereby determining the length and number of the final deflectors, so as to compensate for the less water distribution area impacted by the disc jet of the asynchronous deflector structure, and to simultaneously improve the uniformity of the sprinkler and the combined spacing during combined sprinkling.

[0018] Compared with the prior art, the beneficial effects of the present application are:

[0019] (1) By driving the deflector structure to rotate asynchronously with the nozzle through the transmission mechanism, the disc jet can impact deflectors of different lengths on each radial line, and the water distribution of the entire sprinkling field can be maintained nearly uniform after one sprinkling operation.

[0020] (2) By optimizing the length of each deflector through the farthest and nearest wetting circle radius of the disc jet impacting the deflector, and by superimposing the water distribution curve within the entire wetting circle range to approach a horizontal curve, the number of each deflector is optimized, the water distribution in the sprinkling area is further uniformized on the basis of asynchronous rotation, and under the premise of ensuring uniformity, the combined spacing of adjacent sprinklers during combined sprinkling is significantly increased, which can reach 1.8-1.9 times the range, and the number of sprinklers required in the sprinkling area can be significantly reduced.

[0021] (3) The integral support structure is adopted instead of the existing split structure, the control spring is used to elastically support and position the rotating shaft and the disc, the damping structure is simplified, the disc is maintained at a constant low speed, the range of the sprinkler is increased, the overall structure is simple, and the installation and disassembly are convenient, which can save product materials, reduce costs, and be beneficial to popularization.

[0022] Therefore, the above-mentioned rotating damping type sprinkler significantly improves the sprinkling uniformity and the combined spacing of the sprinkler compared with the existing sprinkler, can save costs, and maximally improves crop yield. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings, in which:

[0024] Figure 1 It is a schematic diagram of the overall cross-sectional structure of an embodiment of the present application;

[0025] Figure 2 A perspective view of a bracket according to an embodiment of the present application;

[0026] Figure 3 A perspective view of a damping disc according to an embodiment of the present application;

[0027] Figure 4 A perspective view of a sealing plate according to an embodiment of the present application;

[0028] Figure 5 A perspective view of a gear bearing according to an embodiment of the present application;

[0029] Figure 6 A perspective view of an external gear according to an embodiment of the present application;

[0030] Figure 7 A schematic view of an incomplete gear structure according to an embodiment of the present application;

[0031] Figure 8 A perspective view of a rotary spray disc according to an embodiment of the present application;

[0032] Figure 9 A schematic view of a cross-section bias angle of a special-shaped space flow channel according to an embodiment of the present application;

[0033] Figure 10 A schematic view of a special-shaped space flow channel structure according to an embodiment of the present application;

[0034] Figure 11 A schematic view of a nozzle structure according to an embodiment of the present application;

[0035] Figure 12 A perspective view of an adapter according to an embodiment of the present application.

[0036] Figures 1-12 Marked: bracket 1, damping box 101, connecting rod 102, nozzle box 103; damping structure 2, damping disc 201, inner hole 2011, viscous damping grease 202; bolt 3; water dispersing structure 4, gear bearing 401, internal gear 4011, water dispersing tooth 402, short tooth 4021, middle tooth 4022, long tooth 4023, fixed bracket 403, second threaded hole 4031; spray disc 5, outlet cross-section 501 of special-shaped space flow channel, middle cross-section 502 of special-shaped space flow channel, inlet cross-section 503 of special-shaped space flow channel, concave hole 504, convex boss 505; nozzle 6, outlet 601 of tapered hole, inlet 602 of tapered hole; adapter 7, hexagonal boss 701, fairing plate 702; position control spring 8; rotating shaft 9; sealing ring 10; sealing plate 11, sealing groove 111, first threaded hole 112; transmission mechanism 12, external gear 121, incomplete gear 122.

[0037] Figure 13 A schematic view of a principle of determining the length of each water dispersing tooth according to an embodiment of the present application.

[0038] Figure 14 The principle diagram for determining the number of each water dispersing tooth for an embodiment of the present application;

[0039] Figure 14 Fig. 2 is a diagram showing the water distribution curve of the water jet of the sprinkler disc, wherein (a) represents the water distribution curve of the water jet of the sprinkler disc not hitting the water dispersing tooth and hitting each water dispersing tooth respectively, (b) represents the water distribution curve of the water jet of the water dispersing tooth without the same tooth length, and (c) represents the water distribution curve of the water jet of the water dispersing tooth with the same tooth length; the horizontal coordinate represents the distance D (mm) of the test point from the rotating center of the sprinkler disc; and the vertical coordinate represents the sprinkling intensity P (mm / h). DETAILED DESCRIPTION

[0040] Embodiments of the present application are described in detail below with reference to examples shown in the attached drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the attached drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0041] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "tooth length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In the description of the present application, the meaning of "a plurality of" or "several" is two or more, unless otherwise explicitly specified and limited.

[0042] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing", etc. should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or integral connection; can be directly connected, or indirectly connected through an intermediate medium; can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] As Figure 1As shown, it is a preferred embodiment of the high spray irrigation uniformity rotating damping type sprinkler, which comprises a support 1, a damping structure 2 arranged in the support 1, a water dispersing structure 4, a spray disc 5 and a nozzle 6. The damping structure 2 is connected with a rotating shaft 9 connected with the spray disc 5. The rotating shaft 9 is connected with a transmission mechanism 12 for driving the water dispersing structure 4 and the nozzle 6 to rotate asynchronously. The water dispersing structure 4 comprises a plurality of water dispersing teeth 402 which can be impacted by the jet flow along the nozzle 6 to the spray disc 5. The plurality of water dispersing teeth 402 comprises several kinds of teeth with gradually increasing length. The nearest wetting circle radius of the spray disc 5 where the jet flow does not impact the water dispersing teeth 402 is equal to the farthest wetting circle radius of the spray disc 5 where the jet flow impacts the water dispersing teeth 402 with the shortest length. The nearest wetting circle radius of the spray disc 5 where the jet flow impacts each level of the water dispersing teeth 402 is equal to the farthest wetting circle radius of the spray disc 5 where the jet flow impacts the water dispersing teeth 402 with the second length. The number of each kind of water dispersing teeth 402 is set according to the water distribution curve in the entire wetting circle range after superposition so as to be close to horizontal.

[0044] As shown in Figure 1 , 2 , 8, the above-mentioned sprinkler further comprises an integral structure of the support 1 which comprises a damping box 101 and a nozzle box 103. The damping structure 2 is arranged in the damping box 101. The damping box 101 is provided with a control position spring 8 for elastically supporting the rotating shaft 9. A plurality of connecting rods 102 are arranged between the nozzle box 103 and the damping box 101. The spray disc 5 is provided with a boss 505 matched with the nozzle box 103. The nozzle 6 is arranged in the nozzle box 103. The integral structure of the support 1 is replaced by the existing split structure. The spray disc 5 is rotatably positioned and installed in the integral support 1 by matching the boss 505 with the nozzle box 103, which makes the structure simple, easy to disassemble and saves product materials.

[0045] Further, the damping box 101 is provided with a cylindrical hole for arranging the control position spring 8. The inner diameter of the cylindrical hole is greater than the control position spring 8 (mm). The height of the cylindrical hole is greater than the free extension length of the control position spring 8 (2-4 mm), which is used to ensure the installation and extension of the control position spring 8.

[0046] Further, the connecting rod 102 is a blade-shaped structure symmetrically connecting the damping box 101 and the nozzle box 103, which is used to ensure the connection and support strength of the support 1 and avoid affecting the jet flow area of the spray disc 5.

[0047] Further, the spray disc 5 is provided with a recessed hole 504 matched with the bottom of the rotating shaft 9 in an interference fit, which is used to connect the rotating shaft 9 to realize the quick installation of the spray disc 5 in the support 1.

[0048] Further, the upper part of the nozzle box 103 is matched with the outer wall of the nozzle 6 in an interference fit, which is used to quickly install the nozzle 6 and prevent the nozzle 6 from moving to affect the inlet flow of the spray disc 5.

[0049] As Figure 1 , 2 , 11, 12, further, the nozzle box 103 is connected with the adapter 7, the adapter 7 is provided with several rectifier plates 702, the flow rate is affected by turbulence avoidance, the nozzle 6 is provided with a tapered hole communicated with the adapter 7 and the spray disc 5, the outlet diameter of the tapered hole 601 is smaller than the inlet diameter of the spray disc 5, so that the water flow increases in speed when flowing out of the nozzle 6 outlet, and the spray disc 5 is promoted to rotate around the axis of the rotating shaft 9 under the action of high-speed water flow.

[0050] Further, the vertical distance between the outlet 601 of the tapered hole and the inlet of the spray disc 5 is 2-3 (mm), and the taper angle θ of the tapered hole is 35°-45°, which is used to control the water flow rate from the nozzle 6 to the spray disc 5.

[0051] Further, the upper part of the adapter 7 extends into the inside of the nozzle box 103 and is connected with the lower part of the nozzle box 103 by screw thread, the adapter 7 is provided with a hexagonal boss 701 outside for matching with a rotating tool, the lower part of the adapter 7 is provided with a screw thread for connecting a pipeline, the adapter 7 is convenient to disassemble and assemble, and the stability of water flow delivered to the nozzle 6 is improved through the adapter 7 containing the rectifier plates 702.

[0052] As Figure 1 , 3 , 4, the above-mentioned spray head, further, the damping structure 2 includes a damping disc 201 and viscous damping grease 202, the lower part of the damping disc 201 is provided with a sealing plate 11 connected with the support 1, the rotating shaft 9 passes through the sealing plate 11 and is connected with the damping disc 201, the viscous damping grease 202 is filled in the gap between the damping disc 201 and the support 1 and the sealing plate 11, the damping structure 2 is simple in structure and convenient to disassemble and assemble compared with the existing damping structure 2, the viscous damping grease 202 is applied to viscous resistance when the damping disc 201 rotates with the rotating shaft 9 in the damping box 101, and the reaction is applied to the spray disc 5, so that the spray disc 5 maintains constant low-speed rotation, thereby increasing the range of the spray head.

[0053] Further, the vertical distance between the top of the damping disc 201 and the damping box 101 is greater than the maximum compression amount of the control spring 8, the damping disc 201 is provided with an inner hole 2011 cemented with the rotating shaft 9, the rotating shaft 9 is provided with a shaft shoulder limited matched with the bottom of the damping disc 201, which is used to quickly connect the damping disc 201 and the rotating shaft 9, and ensures the installation of the control spring 8 and the full contact of the damping disc 201 and the viscous damping grease 202.

[0054] Further, the viscous damping grease 202 is selected from one or both of KL703 type and S(h)30 type, which maintains appropriate viscosity and adhesion.

[0055] Further, the sealing plate 11 is cemented with the damping box 101, the sealing plate 11 is provided with a sealing groove 111 for mounting the rotating shaft 9, and the sealing groove 111 is provided with the sealing ring 10 between the rotating shaft 9, so as to ensure the sealing and waterproof performance in the damping box 101.

[0056] As shown in Figure 1 , 4 As shown in Fig. 7, the above-mentioned nozzle, further, the water distribution structure 4 comprises a gear bearing 401 connected in the support 1, the gear ratio of the gear bearing 401 and the transmission mechanism 12 is 0.05-0.5, the transmission mechanism 12 comprises an external gear 121 or an incomplete gear 122 engaged with the internal tooth 4011 of the gear bearing 401, and a plurality of water distribution teeth 402 are connected at the bottom of the internal tooth 4011 of the gear bearing 401, so that the rotation speed of the water distribution teeth 402 is less than half of the rotation speed of the spray disc 5, and in the process of one irrigation operation, the jet flow of the spray disc 5 can impact the water distribution teeth 402 with different tooth lengths on each radial line, so as to ensure that the water can be sprayed in the whole irrigation area and the water distribution in the whole irrigation area is consistent.

[0057] Further, the outer ring of the gear bearing 401 is connected with a fixed support 403, the center of the fixed support 403 is provided with a first threaded hole 112, the sealing plate 11 is provided with a second threaded hole 4031, and the first threaded hole 112 and the second threaded hole 4031 are provided with a bolt 3 for connecting and fixing the fixed support 403 and the sealing plate 11, so as to conveniently install the water distribution structure 4 in the support 1 above the spray disc 5, the rotating shaft 9 can pass through the fixed support 403 and is cemented with the external gear 121 or the incomplete gear 122, and the water distribution structure 4 is driven to rotate asynchronously with the nozzle 6 through engagement.

[0058] Further, the modulus and the pressure angle of the gear bearing 401 and the external gear 121 are consistent, the center distance a of the internal tooth 4011 of the gear bearing 401 and the external gear 121 is (Z1-Z2)*M / 2, wherein Z1 is the number of teeth of the gear bearing 401, Z2 is the number of teeth of the external gear 121, Z1>Z2, and M is the gear modulus, so that the gear ratio of the gear bearing 401 and the external gear 121 is 0.2-0.5.

[0059] Further, when the minimum number of teeth of the incomplete gear 122 is 1, the gear ratio of the internal tooth 4011 of the gear bearing 401 and the incomplete gear 122 can reach 0.05, so as to further reduce the rotation speed of the gear bearing 401.

[0060] As shown in Figure 1 , 8-10, the spray head is further provided with a special-shaped space flow channel in the spray disc 5, an outlet section 501 of the special-shaped space flow channel has a bias angle β greater than a bias angle α of a middle section and a bias angle of an inlet section, the special-shaped space flow channel with a non-circular outlet section is used to replace a circular space flow channel, so that the spray head has high spray pipe uniformity under low pressure, and the spray disc 5 is promoted to rotate under the action of water flow flowing through the special-shaped space flow channel through the setting of the bias angle.

[0061] Further, the elevation angle γ of the special-shaped space flow channel is 27°-32°, and the bias angle of the inlet section 503 of the special-shaped space flow channel is 0°.

[0062] The spray head is further provided with a horizontal distance of 5-10 (mm) from the water dispersing tooth 402 to the outlet of the spray disc 5, for increasing the spray range.

[0063] The spray head is further provided with a plurality of water dispersing teeth 402 numbered in order of gradually increasing tooth length, and the spray range of the spray disc 5 is determined according to the following formula: The farthest wetted circle radius R of the spray disc 5 jet impacting the i-th water dispersing tooth 402 i In the above formula, P0 represents the spray intensity (mm / h) of the farthest wetted circle radius of the spray disc 5 jet without impacting the water dispersing tooth 402, P j represents the spray intensity (mm / h) at the j-th test point, h j represents the precipitation depth (mm) of the j-th test point, t1 represents the time (h) taken for the precipitation depth of the spray head to reach h j , D j represents the horizontal distance of the j-th test point to the rotation center of the spray head.

[0064] Further, P0 is 0.7 (mm / h), i is an integer and i≤5, to promote the uniformity of water distribution in the entire wetted circle range and avoid affecting the hydraulic performance due to too large i.

[0065] Further, the tooth length of the i-th water dispersing tooth 402 is adjusted according to the following formula: In the above formula, P max represents the maximum spray intensity (mm / h) of the spray disc 5 jet impacting the i-th water dispersing tooth 402, h k represents the precipitation depth (mm) of the k-th test point, t2 represents the time (h) taken for the precipitation depth of the spray head to reach h k , L i represents the nearest wetted circle radius R of the spray disc 5 jet impacting the i-th water dispersing tooth 402. i+1Ri represents the farthest wetted circle radius of the jet of the spray disc 5 impacting the i-th kind of secondary deflector tooth 402 k Rk represents the horizontal distance from the k-th test point to the rotation center of the sprinkler, so as to determine the length and number of each deflector tooth 402, so that the jet of the spray disc 5 impacting the asynchronous deflector structure 4 compensates for the area with less water distribution, and synchronously improves the uniformity of the sprinkler and the combined spacing when the sprinklers are combined.

[0066] As shown in Figure 13 , further, the three kinds of deflector teeth 402 with gradually increasing tooth lengths, i.e., short teeth, medium teeth and long teeth, are included, the tooth length of the short teeth is 4.7 (mm), the tooth length of the medium teeth is 5.7 (mm), and the tooth length of the long teeth is 6.7 (mm), the nearest wetted circle radius L0 of the jet of the spray disc 5 not impacting the deflector teeth 402 is the horizontal distance from the test point with the maximum sprinkling intensity when the jet of the spray disc 5 does not impact the deflector teeth 402 to the rotation center of the sprinkler, the farthest wetted circle radius R1 of the jet of the spray disc 5 impacting the short teeth is equal to L0, which is equal to the horizontal distance from the test point with the sprinkling intensity of 0.6 (mm / h) to the rotation center of the sprinkler, the nearest wetted circle radius L1 of the jet of the spray disc 5 impacting the short teeth is equal to the farthest wetted circle radius R2 of the jet of the spray disc 5 impacting the medium teeth, which is equal to the horizontal distance from the test point with the sprinkling intensity of 0.5 (mm / h) to the rotation center of the sprinkler, the nearest wetted circle radius L2 of the jet of the spray disc 5 impacting the medium teeth is equal to the farthest wetted circle radius R3 of the jet of the spray disc 5 impacting the long teeth, which is equal to the horizontal distance from the test point with the sprinkling intensity of 0.4 (mm / h) to the rotation center of the sprinkler, and the nearest wetted circle radius L3 of the jet of the spray disc 5 impacting the long teeth is the horizontal distance from the test point with the maximum sprinkling intensity when the jet of the spray disc 5 impacts the long teeth to the rotation center of the sprinkler.

[0067] The above-mentioned sprinkler, further, the number of the deflector teeth 402 with the same tooth length is determined according to the water distribution curve after the water quantity superposition under different tooth lengths, so that the water distribution curve in the whole wetted circle range after the superposition tends to be horizontal by adjusting the number of the deflector teeth 402 with the same tooth length, to determine the number S of each kind of deflector tooth 402. i , and the total number of teeth S = ∑S i is obtained.

[0068] As shown in Figure 14 , further, the water distribution curves of the jet of the spray disc 5 not impacting the deflector teeth 402, the jet of the spray disc 5 respectively impacting the short teeth, the medium teeth and the long teeth are shown in Figure 14 (a), the number of the short teeth, the medium teeth and the long teeth is 1 respectively, and the water distribution curve after the superposition is shown in Figure 14 (b), Figure 14 (b) The water distribution between the position close to the sprinkler and 0.4 times the range is relatively uniform, but the sprinkling intensity is small, and such water distribution curve will also lead to uneven water distribution in the whole sprinkling area, and the range is short; the number of the short teeth is increased to 2, and the water distribution curve after the superposition is shown in Figure 14(c) as shown, by increasing the short tooth to 0.6 to 0.85 times the range interval of water, the water distribution curve of the nozzle is stepped, the water distribution in the sprinkling area can be uniform, under the premise of ensuring the uniformity of the combination, the combination distance of adjacent nozzles can reach 1.8-1.9 times the range, which is much larger than the combination distance of 1.2-1.4 times the range of the current rotary damping nozzle, and the number of nozzles required in the sprinkling area can be reduced.

[0069] The assembly steps of the above-mentioned nozzle are:

[0070] S1: glue the control spring 8 in the cylindrical hole of the damping box 101 and invert the integrated support 1, pour the viscous damping grease 202;

[0071] S2: install the damping disc 201 on the rotating shaft 9 through the inner hole 2011, the bottom of the damping disc 201 is limited by the shaft shoulder, and at the same time, in order to prevent the damping disc 201 from sliding circumferentially relative to the rotating shaft 9, the damping disc 201 is fixed on the rotating shaft 9 by gluing;

[0072] S3: assemble the structure of S2 and S1, and ensure that the top of the rotating shaft 9 is put into the cylindrical hole of the damping box 101 and abuts against the control spring 8 during assembly;

[0073] S4: put the sealing ring 10 into the sealing groove 111 of the sealing plate 11, and then screw the bolt 3 into the second threaded hole 4031 of the sealing plate 11 completely;

[0074] S5: apply glue on the sealing plate 11 on the side of the outer wrench structure of the bolt 3, then the rotating shaft 9 passes through the sealing groove 111, ensures that the maximum outer diameter of the sealing plate 11 coincides with the maximum outer diameter of the damping box 101 without misalignment, and glues the sealing plate 11 and the damping box 101;

[0075] S6: tighten the first threaded hole 112 on the gear bearing 401 to the bolt 3, and ensure that the first threaded hole 112 is attached to the sealing plate 11;

[0076] S7: put the through hole of the external gear 121 or the incomplete gear 122 into the rotating shaft 9, ensure that the outer tooth upper surface of the external gear 121 or the incomplete gear 122 is on the same horizontal plane as the inner tooth 4011 upper surface of the gear bearing 401, and the external tooth and the inner tooth 4011 are meshed, and then glue the external gear 121 or the incomplete gear 122 and the rotating shaft 9;

[0077] S8: the position control spring 8 is compressed by the extrusion of the rotating shaft 9, the rotating shaft 9 is positioned and installed in the nozzle box 103 through the convex platform 505 and the nozzle disc 5, the lower part of the rotating shaft 9 is inserted into the concave hole 504 of the rotating nozzle disc 5 through interference fit, and the nozzle disc 5 is rotatably positioned and installed in the support 1 through the elastic support of the spring;

[0078] S9: the nozzle 6 is put into the nozzle box 103 of the integrated support 1 through interference fit, and then the upper thread of the adapter 7 is completely screwed into the lower thread of the nozzle box 103, so as to realize overall assembly.

[0079] The working principle of the above-mentioned nozzle is as follows:

[0080] Under normal working pressure, the water flow enters the nozzle 6 through the adapter 7 under the action of the rectifier plate 702, the water flow increases in speed when it flows out of the outlet of the nozzle 6 due to the tapered hole of the nozzle 6, and then enters the special-shaped space flow channel of the nozzle disc 5, and finally the water flow is sprayed into the air through the outlet of the special-shaped space flow channel. Due to the existence of a certain offset angle in each cross section of the special-shaped space flow channel, the nozzle disc 5 will rotate around the axis of the rotating shaft 9 under the action of high-speed water flow, thereby driving the rotating shaft 9 to rotate.

[0081] Since the damping disc 201 is fixed on the rotating shaft 9 and the damping grease exists in the damping box 101, the rotating speed of the rotating shaft 9 is reduced and kept constant, thereby reacting on the nozzle disc 5, so that the nozzle disc 5 maintains a constant low-speed rotation, the range of the nozzle is increased as much as possible, and the change of the rotating speed is prevented from affecting the performance of the sprinkling irrigation.

[0082] In addition, the external gear 121 or the incomplete gear 122 is also fixed on the rotating shaft 9, the rotating shaft 9 rotates synchronously to drive the external gear 121 or the incomplete gear 122 to rotate, thereby driving the inner teeth 4011 of the gear bearing 401 to rotate through meshing, and since the different tooth length water dispersing teeth 402 are fixed at the bottom of the inner teeth 4011 of the gear bearing 401, the water dispersing teeth 402 rotate at the same speed as the gear bearing 401, and the transmission ratio between the gear bearing 401 and the external gear 121 or the incomplete gear 122 is within the interval of 0.05-0.5, so that the rotating speed of the water dispersing teeth 402 is less than the rotating speed of the nozzle disc 5, which makes the water flow sprayed from the special-shaped space flow channel can hit the water dispersing teeth 402 with different tooth lengths on each radial line during the process of one irrigation operation, thereby ensuring that the water can be sprayed in the entire sprinkling irrigation area, and since the number of teeth with different tooth lengths on the gear bearing 401 is different, that is, the frequency of the jet hitting the teeth with different tooth lengths is different, the area with less water distribution can be compensated, and finally the water distribution in the entire sprinkling irrigation area is consistent.

[0083] The above-mentioned nozzle drives the water distribution structure 4 and the spray disc 5 to rotate asynchronously, replacing the existing intermittent water distribution structure 4 whose position does not change much or changes very slowly. This allows the jet from the spray disc 5 to hit the water distribution teeth 402 of different tooth lengths on each radial line. After a sprinkler irrigation operation, the water distribution of the entire sprinkler irrigation site can be kept almost uniform, which can maximize crop yield.

[0084] The aforementioned nozzle employs a spray pattern where the nearest wetting circle radius of the jet from spray disc 5 that does not impact the water distribution teeth 402 is equal to the farthest wetting circle radius of the jet from spray disc 5 impacting the shortest-length water distribution tooth 402. The nearest wetting circle radius of the jet from spray disc 5 impacting each stage of water distribution teeth 402 is equal to the farthest wetting circle radius of the jet from spray disc 5 impacting the next-level-length water distribution tooth 402. The optimization of the farthest wetting circle radius R of the jet from spray disc 5 impacting the i-th type of water distribution tooth 402 is achieved. i This optimizes the length of each water-distributing tooth 402; by using the water distribution curve of the entire wetting circle after superposition to approach horizontality, the number of each water-distributing tooth 402 is optimized. Based on asynchronous rotation, the water distribution in the irrigation area can be further made uniform. Under the premise of ensuring the uniformity of the combination, the combination spacing between adjacent nozzles during combined irrigation is significantly increased, thereby reducing the number of nozzles required in the irrigation area, reducing costs, and increasing crop yield.

[0085] The above-mentioned nozzle adopts an integrated bracket 1 structure to replace the existing split structure. It uses a control spring 8 to elastically support and position the rotating shaft 9 and spray disc 5, which simplifies the damping structure 2 and makes the spray disc 5 maintain a constant low speed rotation, increasing the nozzle range. This makes the overall structure simple, easy to install and disassemble, saves product materials, reduces costs, and facilitates the promotion and application of rotary damping nozzles.

[0086] The detailed descriptions listed above are merely specific illustrations of feasible embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A rotary damped sprinkler with high uniformity of irrigation, comprising a support (1), a damping structure (2) arranged inside the support (1), a water dispersing structure (4), a sprinkler disc (5) and a nozzle (6), characterized in that, The damping structure (2) is connected with a rotating shaft (9) connected with a spray disc (5), the rotating shaft (9) is connected with a transmission mechanism (12) for driving the asynchronous rotation of the water dispersing structure (4) and the nozzle (6), the water dispersing structure (4) comprises a plurality of water dispersing teeth (402) which can be impacted by the jet flow along the nozzle (6) to the spray disc (5), a plurality of water dispersing teeth (402) comprise a plurality of kinds of tooth length which gradually increases, the nearest wetting circle radius of the spray disc (5) jet flow which does not impact the water dispersing tooth (402) is equal to the farthest wetting circle radius of the spray disc (5) jet flow which impacts the shortest tooth length water dispersing tooth (402), the nearest wetting circle radius of the spray disc (5) jet flow which impacts each level of water dispersing tooth (402) is equal to the farthest wetting circle radius of the spray disc (5) jet flow which impacts the secondary tooth length water dispersing tooth (402), the number of each kind of water dispersing tooth (402) is set according to the water distribution curve in the whole wetting circle range after superposition.

2. A rotary damped sprinkler head for high sprinkler coverage uniformity according to claim 1, wherein, The support (1) is in an integrated structure and comprises a damping box (101) and a nozzle box (103), the damping structure (2) is arranged in the damping box (101), the damping box (101) is provided with a position control spring (8) for elastically supporting the rotating shaft (9), a plurality of connecting rods (102) are arranged between the nozzle box (103) and the damping box (101), the spray disc (5) is provided with a boss (505) matched with the nozzle box (103), and the nozzle (6) is arranged in the nozzle box (103).

3. A rotary damped sprinkler head of high uniformity of sprinkling according to claim 2, characterized in that, The nozzle box (103) is connected with an adapter (7), a plurality of rectifier plates (702) are arranged in the adapter (7), the nozzle (6) is provided with a tapered hole communicated with the adapter (7) and the spray disc (5), and the diameter of the outlet (601) of the tapered hole is smaller than the diameter of the inlet of the spray disc (5).

4. A rotary damped sprinkler head for high sprinkler coverage uniformity according to claim 1, wherein, The damping structure (2) comprises a damping disc (201) and viscous damping grease (202), the lower side of the damping disc (201) is provided with a sealing plate (11) connected with the support (1), the rotating shaft (9) penetrates through the sealing plate (11) and is connected with the damping disc (201), and the viscous damping grease (202) is filled in the gap between the damping disc (201) and the support (1) and the sealing plate (11).

5. A rotary damped sprinkler head of high uniformity of sprinkling according to claim 1, characterized in that, The water dispersing structure (4) comprises a gear bearing (401) connected in the support (1), the transmission ratio of the gear bearing (401) and the transmission mechanism (12) is 0.05-0.5, the transmission mechanism (12) comprises an external gear (121) or an incomplete gear (122) engaged with the internal gear (4011) of the gear bearing (401), and a plurality of water dispersing teeth (402) are connected to the bottom of the internal gear (4011) of the gear bearing (401).

6. A rotary damped sprinkler head for high sprinkler coverage uniformity according to claim 1, wherein, The spray disc (5) is provided with a special space flow channel, the outlet cross section (501) of the special space flow channel has a bias angle β which is greater than the bias angle α of the middle cross section (502) which is greater than the bias angle of the inlet cross section (503).

7. A rotary damped sprinkler head of high uniformity of sprinkling according to claim 1, characterized in that, The horizontal distance of the water dispersing tooth (402) to the outlet of the spray disc (5) is 5-10 mm.

8. A rotating damped sprinkler having high uniformity of coverage according to any one of claims 1-7, wherein: The several kinds of water dispersing teeth (402) with gradually increasing tooth length are numbered from 1, and the numbering is based on Determination of the farthest wetting circle radius R of the jet of the sprinkler (5) impacting the i-th water dispersing tooth (402) i In the above formula, P0 represents the sprinkling intensity of the farthest wetting circle radius when the jet of the sprinkler (5) does not impact the water dispersing tooth (402), mm / h; the unit of P0-0.1*i is mm / h; P j represents the sprinkling intensity at the j-th test point, h j represents the precipitation depth of the j-th test point, t1 represents the time when the precipitation depth of the sprinkler reaches h j D j represents the horizontal distance from the j-th test point to the center of rotation of the sprinkler.

9. A rotary damped sprinkler head of high uniformity of sprinkling according to claim 8, characterized in that, P0 is 0.7 mm / h, i is an integer and i≤5.

10. A rotary damped sprinkler head of high uniformity of sprinkling according to claim 8, characterized in that, According to Adjusting the tooth length of the i-th water deflector tooth (402), in the formula P max represents the maximum sprinkling intensity of the i-th water deflector tooth (402) impacted by the jet of the sprinkler (5), h k represents the precipitation depth of the k-th test point, t2 represents the time when the sprinkler precipitation depth reaches h k used time, L i represents the radius of the nearest wetting circle of the i-th water deflector tooth (402) impacted by the jet of the sprinkler (5), R i+1 represents the radius of the farthest wetting circle of the i-th secondary water deflector tooth (402) impacted by the jet of the sprinkler (5), D k represents the horizontal distance from the k-th test point to the center of rotation of the sprinkler.

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