CN105964436B - A kind of multifunctional low-voltage sprinkling irrigation sprinkler head - Google Patents

Abstract

The invention belongs to the technical field of fluid machinery, and specifically discloses a multifunctional low-pressure irrigation nozzle. The multifunctional low-pressure sprinkler irrigation nozzle involved in the present invention includes an adjustment pipe, an air inlet joint, a connecting pipe, a switching device and a fixing seat. Connect, the other end is placed outside the nozzle, one end of the connecting pipe is connected to the air inlet joint, the other end is connected to the switching device, the fixing seat is set on the outside of the hollow shaft and fixed, and the switching device is fixed on the fixing seat. The switching device includes a switching device inner core, a switching device shell, and a fertilizer tank. The No. П hole and the No. Ш hole of the housing can realize the function of pumping air or fertilizer and medicine of the nozzle by adjusting the communication mode between the inner core of the switching device and the upper hole of the switching device housing.

Description

A multifunctional low-pressure sprinkler nozzle

technical field

The invention belongs to the technical field of agricultural sprinkler irrigation and fluid machinery, and relates to a sprinkler device, in particular to a sprinkler irrigation device integrating water, fertilizer, gas and medicine.

Background technique

The sprinkler head is one of the key equipment for sprinkler irrigation. Its main performance parameters include range, uniformity of water distribution, and sprinkler intensity. In recent years, sprinkler irrigation technology is developing in the direction of water saving, low pressure, energy saving and multi-purpose. The main way for the sprinkler irrigation system to achieve energy saving is to reduce the working pressure of the system. However, when the sprinkler works at a lower pressure, there is often poor radial water distribution, and the diameter of the water droplets at the end of the range is too large, which affects the quality of the sprinkler irrigation water. How to make the sprinkler at a lower pressure Still having good hydraulic performance under pressure has become one of the research directions of sprinkler irrigation. In terms of realizing multi-purpose, the technology of foliar fertilizer fertilization of crops by using sprinkler nozzles is in the research stage, and the effective incorporation of fertilizer liquid and medicinal liquid into the nozzle device is the first choice for multi-functional applications to be solved.

Patent CN201930870U discloses a rocker-type sprinkler head, which uses a sub-nozzle with a throttle groove in the radial direction at the top to realize sprinkler irrigation in the vicinity of the sprinkler head, improving the coverage of sprinkler irrigation. This structure improves the radial water distribution of the sprinkler head through an additional structure. However, it has no effect on the jet crushing process of the nozzle, and has less influence on the water distribution of the nozzle in the low-pressure working condition, and the low-pressure sprinkling irrigation of the nozzle cannot be realized.

Chinese patent CN104050327A discloses "a design method for a variable speed mechanism of a low-pressure nozzle". The variable speed mechanism is used to adjust the range of the nozzle to realize the superposition of water distribution at different ranges to improve the uniformity of sprinkler irrigation. The method of adjusting the range can improve the spraying uniformity of the nozzle, but under the condition of low pressure, the problem of large diameter of water droplets cannot be solved.

Chinese patent CN105032639A discloses "a low-pressure sprinkler head for mobile sprinkler irrigation", which uses a spray plate with multiple flow channels, and the included angles of the flow channels on the spray plate are the same, so that the water sprayed by different flow channels covers different areas to achieve low pressure The uniform spraying of the nozzles, but the nozzles using the spray plate structure have a short range and cannot replace the nozzles with medium and long ranges.

Patent CN202762569U discloses "a rocker nozzle", which uses a mesh-shaped main nozzle and a secondary nozzle to accelerate jet breakage, which improves the water distribution of the nozzle, but the mesh-shaped nozzle will significantly reduce the range of the nozzle, compared to the uniformity As the degree increases, the impact of the range on the performance of the nozzle will be more significant, so the practical application prospect of this method is poor.

The multi-purpose of the sprinkler irrigation system is mainly to attach the fertilizer application device to the head of the irrigation system. Patent CN104365255A discloses a "water-fertilizer integrated irrigation system", in which a dosing tank and a metering pump are designed at the head of the irrigation system, and the metering pump is used to pump fertilizer into the irrigation pipe network to realize water and fertilizer synchronization; patent CN104025791A discloses "a Plant drip irrigation, water and fertilizer integrated system", using a precision fertilizer injection pump to input the dissolved fertilizer into the drip irrigation unit according to the preset flow rate. However, due to the inconsistency of irrigation water in different areas of the irrigation system, there are certain differences in the amount of fertilizer applied in different areas.

In view of the above shortcomings, an internal mixing structure is adopted. At the end of the sprinkler irrigation system, that is, at the outlet of the nozzle, a mixing device is designed to realize the integration of water and fertilizer in the sprinkler irrigation system, and it can also make the nozzle change from single-phase water jet to water vapor. Two-phase jet flow, after the water jet itself contains tiny bubbles, before and after spraying, the volume of the bubbles changes due to pressure changes, which affects the fragmentation of the main body of the jet, so as to improve the uniformity of sprinkler irrigation under low pressure.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a multi-functional sprinkler irrigation nozzle, which can realize low-pressure spraying of the nozzle and synchronous spraying of water, fertilizer and water medicine.

In order to achieve the above object, the present invention adopts the following technical solutions:

A multifunctional low-pressure sprinkler nozzle, which includes a water delivery channel and a mixing device, the water delivery channel includes a nozzle, a nozzle, a flow stabilizer, an elbow, a hollow shaft, a base and a standpipe, and the flow stabilizer is set on the nozzle pipe One end of the spray pipe is fixedly installed with a nozzle, the other end is fixedly connected with the elbow, the elbow is fixedly connected with the hollow shaft, the outside of the hollow shaft is fitted with a base, and the standpipe is fixedly connected with the base; the mixing device includes a regulating tube, an inlet Gas connector, connecting pipe, switching device and fixing seat, the adjusting pipe is placed inside the nozzle, one end of the air inlet connector extends into the flow channel of the nozzle, and is fixedly connected with the regulating pipe, the other end is placed outside the nozzle, and one end of the connecting pipe is connected to the inlet The gas joint is connected, the other end is connected with the switching device, the fixing seat is set on the outside of the elbow and fixed, and the switching device is fixed on the fixing seat.

Further, the switching device includes an inner core of the switching device, a switching device housing, and a fertilizer barrel. A rotating rod is arranged on the axis of the inner core. The inner core of the switching device is installed in the switching device housing, and the fertilizer barrel can pass through The disassembly connection method is installed on the outside of the switching device shell. The inner core of the switching device is processed with the І hole of the inner core and the П hole of the inner core, which are connected with each other. , Shell No. Ш hole.

The angle b between the No. І hole of the inner core and the No. П hole of the inner core, the angle c2 between the No. І hole of the shell and the No. The angle c1 between them is the same size.

The inner hole of the current stabilizer and the outer ring of the current stabilizer are processed on the current stabilizer, and the inner hole of the current stabilizer and the outer ring of the current stabilizer are connected by reinforcing ribs, and the regulating pipe needs to pass through the inner hole of the current stabilizer. Use transitional coordination between them.

Further, the adjusting pipe is installed concentrically with the nozzle, and the distance between the outlet of the adjusting pipe and the outlet of the nozzle is L≤5mm.

The beneficial effects of the present invention are:

The multifunctional low-pressure sprinkler nozzle provided by the present invention has a simple structure and is easy to manufacture. The water-air two-phase jet flow generated after being mixed by the nozzle enters the infinite space where the ambient pressure is atmospheric pressure. Since the water jet itself contains gas, it can be compressed before and after spraying. The volume of the gas phase changes due to pressure changes, which affects the fragmentation of the main body of the jet and significantly improves the atomization effect of the nozzle. By adding fertilizer and drug application devices at the nozzle inlet, it can ensure the use of fertilizer or medicine in the control area of each nozzle. Quantitative unity.

Description of drawings

Fig. 1 is the structural representation of multifunctional low-pressure sprinkling irrigation nozzle;

Figure 2 is a sectional view of the current stabilizer;

Fig. 3 is a side view of the current stabilizer;

Figure 4 is a cross-sectional view of the switching device;

Figure 5 is a side view of the switching device;

Fig. 6 is the water volume distribution curve of the aerated rocker-arm sprinkler and the common rocker-arm sprinkler under low pressure conditions.

Explanation of reference signs:

1-Nozzle, 2-Nozzle, 3-Adjusting pipe, 4-Intake joint, 5-Bend pipe, 6-Hollow shaft, 7-Base, 8-Connecting pipe, 9-Switching device, 10-Standpipe, 11 -fixed seat, 12-regulating pipe outlet, 13-nozzle outlet, 14-switching device inner core, 15-switching device shell, 16-fertilizer barrel, 17-housing І hole, 18-inner core І hole , 19-the П hole of the shell, 20-the П hole of the inner core, 21-the Ш hole of the shell, 22-the current stabilizer, 23-the inner hole of the current stabilizer, 24-the outer ring of the current stabilizer, 25-reinforcement Rib, 26-rotating rod.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

Please refer to Fig. 1, Fig. 2 and Fig. 3, a kind of multi-functional low-pressure sprinkling irrigation sprinkler head, comprises water delivery channel and mixing device, and described water delivery channel includes nozzle 1, spray pipe 2, flow stabilizer 22, elbow 5, hollow Shaft 6, base 7 and standpipe 10, one end of nozzle pipe 2 is fixedly installed with nozzle 1, the other end is fixedly connected with elbow 5, flow stabilizer 22 is processed with flow stabilizer inner hole 23 and flow stabilizer outer ring 24, The inner hole 23 of the flow stabilizer and the outer ring 24 of the flow stabilizer are connected by reinforcing ribs 25, and the regulating pipe 3 needs to pass through the inner hole 23 of the flow stabilizer. Under the effect of pressurized water, the regulating pipe 3 vibrates. The cone angle a of the outer ring 24 of the flow stabilizer should be the same as or close to the size of the inside cone angle of the nozzle 2, so as to fix the flow stabilizer 22. The bent pipe 5 is fixedly connected with the hollow shaft 6 , the outside of the hollow shaft 6 is covered with a base 7 , and the standpipe 10 is fixedly connected with the base 7 .

The mixing device includes a regulating pipe 3, an air inlet joint 4, a connecting pipe 8, a switching device 9 and a fixing seat 11. The regulating pipe 3 is placed inside the nozzle pipe 2 and installed concentrically with the nozzle pipe 2. The outlet 12 of the regulating pipe refers to the outlet section of the regulating pipe 3, and the outlet 13 of the nozzle refers to the outlet section of the nozzle 1. Depending on the structure of the nozzle, the outlet 12 of the regulating pipe can extend out of the outlet 13 of the nozzle, or slightly retract into the inner side of the outlet 13 of the nozzle. The optimal size of the distance between the outlet 12 and the nozzle outlet 13 is L≦5mm. One end of the air inlet joint 4 extends into the flow channel of the nozzle, and is fixedly connected with the regulating pipe 3, and the other end is placed outside the nozzle pipe 2. One end of the connecting pipe 8 is connected with the air inlet joint 4, and the other end is connected with the switching device 9. Use silicone hose. The fixing seat 11 is sleeved on the outside of the elbow 5 and fixed, and the switching device 9 is fixed on the fixing seat 11 to ensure that the switching device 9 rotates synchronously with the nozzle.

Please refer to Fig. 4 and Fig. 5, described switching device 9 comprises switching device inner core 14, switching device housing 15, fertilizer bucket 16, and switching device inner core 14 is installed in the switching device housing 15, and fertilizer bucket 16 passes through The detachable connection is installed on the outside of the switching device housing 15, and the recommended connection method between the fertilizer bucket 16 and the switching device housing 15 is screw connection. The inner core 14 of the switching device is processed with the first І hole 18 of the inner core and the first П hole 20 of the inner core which communicate with each other. Hole 21, the angle b between the first hole 18 of the inner core and the first hole 20 of the inner core should be the angle c2 between the first hole 17 of the shell and the first hole 21 of the shell, and the angle b between the first hole 21 of the shell and the first hole 21 of the shell. The included angle c1 between the first П holes 19 of the housing is consistent in size. In the position shown in Figure 4, when the No. І hole 17 of the shell communicates with the No. П hole 20 of the inner core, and when the No. І hole 18 of the inner core communicates with the No. Ш hole 21 of the housing, the nozzle realizes the function of pumping air; the inner core ( 14) The rotating rod 26 rotates the inner core 14 of the switching device, so that the No. І hole 17 of the housing communicates with the No. Ш hole 21 of the housing, and when the No. Fat, medicine function.

Figure 6 shows the test results of the water volume comparison between the air-entrained nozzle and the ordinary rocker-arm nozzle. From the test results, it is known that the firing range is close to the same in the case of air-entrainment and non-air-entrainment, and the range of the air-entrainment nozzle is 200kPa It is also slightly larger than the non-air-entrained rocker nozzle. In the case of consistent flow, air-entrainment has little effect on the range. Under the two pressures, the peak value of the irrigation intensity at the end of the range of the aerated nozzle is smaller than that of the original rocker nozzle, and the aeration improves the irrigation intensity in the middle section of the range (8-12 meters), so the aeration is effective in improving the radial water distribution.

The above descriptions are only preferred implementations of the present invention, and the scope of protection of the present invention is not limited to the above-mentioned implementations. All technical solutions belonging to the principle of the present invention belong to the scope of protection of the present invention. For those skilled in the art, some improvements and modifications made without departing from the principles of the present invention should also be regarded as the protection scope of the present invention. The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. A multifunctional low-pressure sprinkler nozzle is characterized in that: it includes a water delivery channel and a mixing device, The water delivery channel comprises a nozzle (1), a spray pipe (2), a flow stabilizer (22), an elbow (5), a hollow shaft (6), a base (7) and a vertical pipe (10), and the flow stabilizer (22) Set inside the nozzle pipe (2), one end of the nozzle pipe (2) is fixedly installed with the nozzle (1), the other end is fixedly connected with the elbow (5), and the elbow (5) is fixedly connected with the hollow shaft (6) , the outer side of the hollow shaft (6) is covered with a base (7), and the standpipe (10) is fixedly connected with the base (7); The mixing device includes a regulating pipe (3), an air inlet joint (4), a connecting pipe (8), a switching device (9) and a fixing seat (11), and the regulating pipe (3) is placed inside the nozzle pipe (2) , one end of the air inlet joint (4) extends into the flow channel of the nozzle, and is fixedly connected with the regulating pipe (3), and the other end is placed outside the nozzle pipe (2); one end of the connecting pipe (8) is connected with the air inlet joint (4), and the other One end is connected with the switching device (9); the fixing seat (11) is set on the outside of the elbow (5) and fixed, and the switching device (9) is fixed on the fixing seat (11); The switching device (9) includes a switching device inner core (14), a switching device housing (15) and a fertilizer bucket (16), and a rotating rod (26) is arranged on the axis of the inner core (14), so that The switching device inner core (14) is installed in the switching device housing (15), and the fertilizer barrel (16) is installed on the outside of the switching device housing (15) through a detachable connection; the switching device inner core (14) The first hole (18) of the inner core and the first hole (20) of the inner core are processed with each other, and the first hole (17) and the first hole (17) of the housing are processed on the switching device housing (15) ( 19) and the first Ш hole (21) of the housing. 2. a kind of multifunctional low-pressure sprinkling nozzle according to claim 1, is characterized in that, the angle b between the 1st hole (18) of the inner core and the П hole (20) of the inner core, and the 1st hole of the housing The included angle c2 between the I hole (17) and the Ш hole (21) of the housing, the angle c1 between the Ш hole (21) of the housing and the П hole (19) of the housing are consistent in size. 3. A kind of multifunctional low-pressure sprinkler nozzle according to claim 1, characterized in that, the flow stabilizer (22) is processed with a flow stabilizer inner hole (23) and a flow stabilizer outer ring (24), The inner hole (23) of the current stabilizer and the outer ring (24) of the current stabilizer are connected by reinforcing ribs (25), the regulating pipe (3) needs to pass through the inner hole (23) of the current stabilizer, and a transition Coordination method. 4. A multifunctional low-pressure sprinkler nozzle according to claim 1, characterized in that, the regulating pipe (3) is concentrically installed with the nozzle pipe (2), and the distance between the regulating pipe outlet (12) and the nozzle outlet (13) The distance L≤5mm.