A drip irrigation emitter and an irrigation system having the same

Abstract

The present invention provides a drip irrigation emitter and an irrigation system having the same, belonging to the technical field of drip irrigation. The drip irrigation emitter includes: a water outlet and a water inlet, a flow channel structure, and the flow channel unit includes: a first energy dissipation part having a first spiral flow channel, a first eddy current chamber, and a second spiral flow channel that are sequentially connected; a second energy dissipation part having a third spiral flow channel, a second eddy current chamber, and a fourth spiral flow channel that are sequentially connected; and a straight flow channel. For the drip irrigation emitter provided by the present invention, water flows into the first spiral flow channel through the water inlet and enters the first eddy current chamber. When the water enters the first eddy current chamber, eddy currents will be generated in the first eddy current chamber, and after the water accumulates in the first eddy current chamber, it enters the second spiral flow channel. When the water passes through the first eddy current chamber and enters the second spiral flow channel, energy will be consumed. Then, the energy of the water is further consumed through the second eddy current chamber in the second energy dissipation part, reducing the water flow energy, and the energy dissipation effect is good, enabling it to meet the water outlet conditions of the emitter.

Description

Technical Field

[0001] The present invention relates to the technical field of drip irrigation, and particularly relates to a drip irrigation emitter and an irrigation system having the same. Background Art

[0002] Modern agricultural micro-irrigation technologies include: micro-sprinkler irrigation, drip irrigation, subsurface irrigation, etc. Among them, drip irrigation is an advanced water-saving irrigation technology, which can wet the surface of crops and the soil near the roots in the form of dripping water through drip irrigation emitters installed on the lateral pipes. The emitter is the core component in the drip irrigation system and an important unit to realize the irrigation technology. Its function is to reduce the kinetic energy of the pressurized water flow in the pipe belt through the energy dissipation structure in the emitter, so as to achieve the purpose of stable water output for drip irrigation. Summary of the Invention

[0003] Therefore, the present invention provides a drip irrigation emitter with good energy dissipation effect and an irrigation system having the same.

[0004] To solve the above technical problems, the present invention provides a drip irrigation emitter, including: a water outlet and a water inlet, there is a flow channel structure between the water outlet and the water inlet, and the flow channel structure is composed of a plurality of identical flow channel units connected in series. Each flow channel unit includes:

[0005] A first energy reduction part, having a first spiral flow channel, a first eddy current chamber and a second spiral flow channel connected in sequence;

[0006] A second energy reduction part, having a third spiral flow channel, a second eddy current chamber and a fourth spiral flow channel connected in sequence;

[0007] A straight flow channel, one end of which is connected to the second spiral flow channel, and the other end is connected to the third spiral flow channel.

[0008] Optionally, the first eddy current chamber has a first inlet connected to the first spiral flow channel, and also has a first outlet connected to the second spiral flow channel. The first inlet and the first outlet are arranged at different height positions on the first eddy current chamber.

[0009] Optionally, the first inlet and the first outlet are arranged on the same side of the first eddy current chamber;

[0010] The spiral directions of the first spiral flow channel and the second spiral flow channel are the same.

[0011] Optionally, the second eddy current chamber has a second inlet connected to the third spiral flow channel, and also has a second outlet connected to the fourth spiral flow channel. The second inlet and the second outlet are arranged at different height positions on the second eddy current chamber.

[0012] Optionally, the second inlet and the second outlet are arranged on the same side of the second eddy current chamber;

[0013] The third spiral flow channel and the fourth spiral flow channel have the same spiral direction.

[0014] Optionally, the first eddy current chamber and / or the second eddy current chamber is cylindrical or prismatic.

[0015] Optionally, the connecting portion between the first inlet and the first outlet on the first eddy current chamber is conical;

[0016] The connecting portion between the second inlet and the second outlet on the second eddy current chamber is conical.

[0017] Optionally, the flow area of the first spiral flow channel and / or the third spiral flow channel gradually decreases along the flow direction.

[0018] Optionally, the flow area of the second spiral flow channel and / or the fourth spiral flow channel gradually increases along the flow direction.

[0019] A watering system is also provided, including the above-mentioned drip irrigation emitter.

[0020] The technical solution of the present invention has the following advantages:

[0021] 1. For the drip irrigation emitter provided by the present invention, each flow channel unit includes a first energy dissipation part and a second energy dissipation part. The second energy dissipation part is communicated with the first energy dissipation part through a direct flow channel. The first energy dissipation part includes a first spiral flow channel, a first eddy current chamber and a second spiral flow channel which are sequentially communicated. Water flows into the first spiral flow channel through the water inlet and then into the first eddy current chamber. When the water enters the first eddy current chamber, eddy currents will be generated in the first eddy current chamber, and the water will gather in the first eddy current chamber and then enter the second spiral flow channel. When the water enters the second spiral flow channel through the first eddy current chamber, energy will be consumed, and then the energy of the water will be further consumed through the second eddy current chamber in the second energy dissipation part, reducing the water energy and having a good energy dissipation effect, so that it meets the water outlet condition of the emitter.

[0022] 2. For the drip irrigation emitter provided by the present invention, the first inlet and the first outlet on the first eddy current chamber are arranged at different height positions, so that when the water enters the first eddy current chamber through the first inlet and then enters the first outlet, there is a height difference, and the height difference can further enhance the consumption of the water energy.

[0023] 3. For the drip irrigation emitter provided by the present invention, the first inlet and the first outlet are arranged on the same side of the first eddy current chamber. In this way, after the water flow enters the first eddy current chamber through the first inlet, it needs to flow along the inner wall of the first eddy current chamber for at least one week before entering the first outlet. At the same time, the spiral directions of the first spiral flow channel and the second spiral flow channel are the same, and the tangents generated by the first inlet and the first eddy current chamber are the same as those generated by the first outlet and the first eddy current chamber. In this way, the water flow direction entering from the first inlet is opposite to the water flow direction flowing out from the first outlet, further enhancing the energy consumption effect of the water flow.

[0024] 4. For the drip irrigation emitter provided by the present invention, the second inlet and the second outlet on the second eddy current chamber are arranged at different height positions, so that when the water flow enters the second eddy current chamber through the second inlet and then enters the second outlet, there is a height difference, and the height difference can further enhance the consumption of the water flow energy.

[0025] 5. For the drip irrigation emitter provided by the present invention, the second inlet and the second outlet are arranged on the same side of the first eddy current chamber. In this way, after the water flow enters the second eddy current chamber through the second inlet, it needs to flow along the inner wall of the second eddy current chamber for at least one week before entering the second outlet. At the same time, the spiral directions of the third spiral flow channel and the fourth spiral flow channel are the same, and the tangents generated by the second inlet and the second eddy current chamber are the same as those generated by the second outlet and the second eddy current chamber. In this way, the water flow direction entering from the second inlet is opposite to the water flow direction flowing out from the second outlet, further enhancing the energy consumption effect of the water flow.

[0026] 6. For the drip irrigation emitter provided by the present invention, the first eddy current chamber and / or the second eddy current chamber are arranged in a cylindrical shape or a multi-prismatic shape. The regular shape controls the height difference between the inlet and the outlet in the height direction. At the same time, the processing process is relatively simple and it is easier to manufacture.

[0027] 7. For the drip irrigation emitter provided by the present invention, the flow area of the first spiral flow channel and / or the third spiral flow channel gradually decreases along the flow direction, and the flow area of the second spiral flow channel and / or the fourth spiral flow channel gradually increases along the flow direction. When the water flow flows, it accelerates in the first spiral flow channel, buffers when flowing into the first eddy current chamber, decelerates in the second spiral flow channel. The water flow continuously undergoes acceleration, buffering, and deceleration. During this process, the energy of the water flow is continuously consumed until the energy dissipation effect is achieved and the water flows out of the emitter. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 Schematic structural diagram of the drip irrigation emitter provided in this embodiment of the present invention;

[0030] Figure 2 Top view of the drip irrigation emitter provided in this embodiment of the present invention;

[0031] Figure 3 Bottom view of the drip irrigation emitter provided in this embodiment of the present invention;

[0032] Figure 4 Front view of the drip irrigation emitter provided in this embodiment of the present invention;

[0033] Figure 5 Top view streamline diagram of the flow channel unit of the drip irrigation emitter provided in this embodiment of the present invention;

[0034] Figure 6 Bottom view streamline diagram of the flow channel unit of the drip irrigation emitter provided in this embodiment of the present invention;

[0035] Figure 7 Pressure-flow relationship diagram of the drip irrigation emitter provided in this embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 1. Water inlet; 2. Inlet flow channel; 3. First spiral flow channel; 41. First eddy cavity; 42. Second eddy cavity; 6. Second spiral flow channel; 7. Straight flow channel; 8. Third spiral flow channel; 9. Fourth spiral flow channel; 10. Outlet flow channel; 11. Water outlet. Detailed implementation manners

[0038] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0041] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] Embodiment 1

[0043] This embodiment provides a specific implementation manner of a drip irrigation emitter, as Figure 1 、 Figure 2 and Figure 3 shown. The emitter includes a water inlet 1 and a water outlet 11. There is a flow channel structure between the water inlet 1 and the water outlet 11. The flow channel structure includes an inlet flow channel 2 and an outlet flow channel 10. The water inlet 1 is arranged at the end of the inlet flow channel 2, and the water outlet 11 is arranged at the end of the outlet flow channel 10. The flow channel structure is composed of a plurality of identical flow channel units connected in series. Taking one flow channel unit as an example, the flow channel unit includes a first energy dissipation part and a second energy dissipation part. The second energy dissipation part is communicated with the first energy dissipation part through a straight flow channel 7. The first energy dissipation part includes a first spiral flow channel 3, a first eddy current cavity 41 and a second spiral flow channel 6 that are connected in sequence. The first spiral flow channel 3 is communicated with the inlet flow channel 2. Water enters the first spiral flow channel 3 through the water inlet 1 and enters the first eddy current cavity 41. When the water enters the first eddy current cavity 41, eddy currents will be generated in the first eddy current cavity 41, and after the water accumulates in the first eddy current cavity 41, it enters the second spiral flow channel 6. When the water passes through the first eddy current cavity 41 and enters the second spiral flow channel 6, energy will be consumed. When passing through the second energy dissipation part, the water flows through the straight flow channel 7 to the third spiral flow channel 8, enters the second eddy current cavity 42, and then enters the fourth spiral flow channel 9. The second eddy current cavity 42 of the second energy dissipation part further consumes the energy of the water flow, reduces the water flow energy, and has a good energy dissipation effect, so that it meets the water outlet conditions of the emitter.

[0044] As Figure 4 shown, the first inlet and the first outlet on the first eddy current cavity 41 are arranged at different height positions, so that when the water enters the first eddy current cavity 41 through the first inlet and then enters the first outlet, there is a height difference, and the height difference can further enhance the consumption of the water flow energy.

[0045] The second inlet and the second outlet on the second eddy current chamber 42 are arranged at different height positions, so that when the water flow enters the second eddy current chamber 42 through the second inlet and then enters the second outlet, there is a height difference, and the height difference can further enhance the consumption of the water flow energy.

[0046] Specifically, the first inlet is arranged above the first eddy current chamber 41, and the first outlet is arranged below the first eddy current chamber 41; the second inlet is arranged below the second eddy current chamber 42 and is correspondingly arranged at the same height as the first outlet, and the second outlet is arranged above the second eddy current chamber 42 and is correspondingly arranged at the same height as the first inlet. When the water flow flows into the first eddy current chamber 41, the water flow flows downward along the inner wall of the first eddy current chamber 41, flows to the first outlet, enters the third spiral flow channel 8 through the second spiral flow channel 6 and the direct flow channel 7. When the water flow enters the second eddy current chamber 42 from the third spiral flow channel 8, the second inlet is located below, and the water level in the second eddy current chamber 42 needs to reach a certain height to flow out through the second outlet, and the energy consumption effect is better.

[0047] As an alternative embodiment, the first inlet and the first outlet can also be arranged at the same height, and the first inlet and the first outlet do not need to be arranged on the same side of the first eddy current chamber 41 either; the second inlet and the second outlet can also be arranged at the same height, and the second inlet and the second outlet do not need to be arranged on the same side of the second eddy current chamber 42 either. Only the energy dissipation effect of such an arrangement is worse than that of the preferred arrangement, but the energy dissipation effect can also be achieved.

[0048] As Figure 5 and Figure 6 shown, the first inlet and the first outlet are arranged on the same side of the first eddy current chamber 41, so that the water flow needs to flow along the inner wall of the first eddy current chamber 41 for at least one week after entering the first eddy current chamber 41 through the first inlet before entering the first outlet. At the same time, the spiral directions of the first spiral flow channel 3 and the second spiral flow channel 6 are the same, and the tangents generated by the first inlet and the first eddy current chamber 41 are the same as the tangents generated by the first outlet and the first eddy current chamber 41. In this way, the water flow direction entering from the first inlet is opposite to the water flow direction flowing out from the first outlet. As Figure 5 shown in, when the water flow flows into the first eddy current chamber 41, it rotates clockwise, and when it flows out of the first eddy current chamber 41, it rotates counterclockwise. Then when it flows into the second eddy current chamber 42, the water flow rotates counterclockwise, and when it flows out of the second eddy current chamber 42, the water flow rotates clockwise. By continuously changing the water flow direction through the eddy current chamber, the water flow will consume energy every time the flow direction is changed, further enhancing the energy consumption effect of the water flow.

[0049] The second inlet and the second outlet are arranged on the same side of the first eddy current chamber 41, so that after the water flow enters the second eddy current chamber 42 through the second inlet, it flows along the inner wall of the second eddy current chamber 42 for at least one week before entering the second outlet. At the same time, the spiral directions of the third spiral flow channel 8 and the fourth spiral flow channel 9 are the same, and the tangents generated by the second inlet and the second eddy current chamber 42 are the same as the tangents generated by the second outlet and the second eddy current chamber 42. In this way, the water flow direction entering from the second inlet is opposite to the water flow direction flowing out from the second outlet, further enhancing the energy consumption effect of the water flow.

[0050] The first eddy current chamber 41 and the second eddy current chamber 42 are arranged in a cylindrical shape or a multi-prismatic shape. The regular shape controls the height difference between the inlet and the outlet in the height direction. At the same time, the processing process is relatively simple and it is easier to manufacture.

[0051] As an alternative embodiment, the first eddy current chamber 41 and the second eddy current chamber 42 can also be separately arranged in a cylindrical shape or a multi-prismatic shape.

[0052] The flow areas of the first spiral flow channel 3 and the third spiral flow channel 8 gradually decrease along the flow direction, and the flow areas of the second spiral flow channel 6 and the fourth spiral flow channel 9 gradually increase along the flow direction. When the water flow flows, it accelerates in the first spiral flow channel 3, buffers when flowing into the first eddy current chamber 41, and decelerates in the second spiral flow channel 6. The water flow continuously accelerates, buffers, and decelerates. During this process, the energy of the water flow is continuously consumed until the energy dissipation effect is achieved and the water flows out of the emitter.

[0053] As an alternative embodiment, it can be that the flow area of the first spiral flow channel 3 remains unchanged and the flow area of the third spiral flow channel 8 gradually decreases along the flow direction; it can also be that the flow area of the first spiral flow channel 3 gradually decreases along the flow direction and the flow area of the third spiral flow channel 8 remains unchanged.

[0054] As an alternative embodiment, it can be that the flow area of the second spiral flow channel 6 remains unchanged and the flow area of the fourth spiral flow channel 9 gradually increases along the flow direction; it can also be that the flow area of the second spiral flow channel 6 gradually increases along the flow direction and the flow area of the fourth spiral flow channel 9 remains unchanged.

[0055] As Figure 4 shown, the middle part of the eddy current chamber is in a conical shape with a larger upper part and a smaller lower part, that is, the part between the first inlet and the first outlet is in a conical shape with a larger upper part and a smaller lower part, and the part between the second inlet and the second outlet is in a conical shape with a larger upper part and a smaller lower part. When the water flow passes through each flow channel unit, it will experience a process of flowing from a larger upper part to a smaller lower part and then from a smaller lower part to a larger upper part at the middle position of the eddy current chamber, further increasing the energy dissipation effect.

[0056] As Figure 7As shown, the hydraulic performance of the drip irrigation emitter provided in this embodiment was simulated in the CFD analysis software FLUENT, the flow rates of the drip irrigation emitter under different pressures were obtained, and the pressure-flow relationship curve was fitted. Its flow state index was 0.5173, and the hydraulic performance was good. The pressure decreased with the increase in the number of flow channel units, and the energy dissipation effect of the flow channel was obvious.

[0057] Embodiment 2

[0058] This embodiment provides a specific implementation manner of the irrigation system, including the drip irrigation emitter in Embodiment 1. The drip irrigation emitter is connected to the pressure pipeline. The water flow in the pressure pipeline flows into the drip irrigation emitter, and after the energy dissipation of the flow channel structure, the use requirements of the water flow pressure at the water outlet 11 of the emitter are met.

[0059] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A drip irrigation emitter, characterized in that, comprising: a water outlet (11) and a water inlet (1), there is a flow channel structure between the water outlet (11) and the water inlet (1), and the flow channel structure is composed of a plurality of identical flow channel units connected in series. Each of the flow channel units includes: a first energy reduction part, having a first spiral flow channel (3), a first eddy current chamber (41) and a second spiral flow channel (6) connected in sequence; a second energy reduction part, having a third spiral flow channel (8), a second eddy current chamber (42) and a fourth spiral flow channel (9) connected in sequence; a straight flow channel (7), one end of which is connected to the second spiral flow channel (6), and the other end of which is connected to the third spiral flow channel (8); the first eddy current chamber (41) has a first inlet connected to the first spiral flow channel (3), and also has a first outlet connected to the second spiral flow channel (6), and the first inlet and the first outlet are arranged at different height positions on the first eddy current chamber (41); the first inlet and the first outlet are arranged on the same side of the first eddy current chamber (41); the spiral directions of the first spiral flow channel (3) and the second spiral flow channel (6) are the same; the flow area of the first spiral flow channel (3) and / or the third spiral flow channel (8) gradually decreases along the flow direction; the flow area of the second spiral flow channel (6) and / or the fourth spiral flow channel (9) gradually increases along the flow direction.

2. The drip irrigation emitter according to claim 1, characterized in that, the second eddy current chamber (42) has a second inlet connected to the third spiral flow channel (8), and also has a second outlet connected to the fourth spiral flow channel (9), and the second inlet and the second outlet are arranged at different height positions on the second eddy current chamber (42).

3. The drip irrigation emitter according to claim 2, characterized in that, the second inlet and the second outlet are arranged on the same side of the second eddy current chamber (42); the spiral directions of the third spiral flow channel (8) and the fourth spiral flow channel (9) are the same.

4. The drip irrigation emitter according to any one of claims 1-3, characterized in that, the first eddy current chamber (41) and / or the second eddy current chamber (42) is in a cylindrical shape or a multi-prismatic shape.

5. The drip irrigation emitter according to any one of claims 1-3, characterized in that, the connecting part between the first inlet and the first outlet on the first eddy current chamber (41) is in a conical shape; the connecting part between the second inlet and the second outlet on the second eddy current chamber (42) is in a conical shape.

6. An irrigation system, characterized in that, comprising the drip irrigation emitter according to any one of claims 1-5.

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