Flow channel variable irrigation emitter and method

Abstract

The irrigation emitter comprises an irrigation emitter body and a control device, an energy dissipation flow channel A and an energy dissipation flow channel B are arranged in the irrigation emitter body, a water inlet head is arranged on the irrigation emitter body, and one end of the irrigation emitter body is connected with the control device. Due to the fact that the energy dissipation flow channel A and the energy dissipation flow channel B are different in flow channel and different in outflow under the condition of the same inlet flow speed, the water outlet A can be aligned with water outlets of different energy dissipation flow channels according to different water requirements of different crops, the outflow of the irrigation emitter is adjusted, and the irrigation requirements of different crops are met. Compared with an existing irrigation emitter, the two energy dissipation flow channels are arranged, energy dissipation is achieved by changing the water flow movement direction, no water blocking part exists, particulate matter cannot be intercepted, the flow channel anti-blocking performance is good, meanwhile, the irrigation emitter can adjust the outflow according to the actual water demand conditions of different crops, and therefore the optimal irrigation effect is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of sprinklers, and in particular relates to a sprinkler with variable flow channel and a method thereof. Background Art

[0002] Ecological slope protection is an ecological restoration technology that can be widely used in various types of earth-rock slopes, hardened slopes, and rock slopes. By setting up a drip irrigation system on the ecological slope protection, a good maintenance effect can be achieved with a small amount of water. Ecological slope protection drip irrigation technology can be widely used in various engineering disturbance area slopes, waterfronts, and high and steep rock slope ecological restoration projects such as mine stone yards. It can also be widely used in the ecological restoration of concrete slopes and abandoned mining areas, rivers and reservoir areas. The core emitter component in the drip irrigation system changes the flow structure and form to turbulent the water flow, adjust the water flow pressure, achieve the purpose of energy dissipation, and improve the steady flow performance of the emitter. Therefore, the energy dissipation performance, controllable water output, and anti-blocking methods of the emitter have become the focus of the research and development of drip irrigation systems.

[0003] The patent document with the announcement number CN117814096A discloses a gear-type adjustable flow pressure compensation irrigator and method, including an upper cover and a base, a flow channel inner core is provided in the inner cavity of the base, a pressure compensation gasket is provided between the flow channel inner core and the upper cover, a plug is provided at the top of the upper cover, a water outlet is provided at the bottom of the base, the flow channel inner core includes a labyrinth flow channel inner tooth, a labyrinth flow channel water outlet is provided on one side of the labyrinth flow channel inner tooth, the base includes a labyrinth flow channel outer tooth, the labyrinth flow channel outer tooth and the labyrinth flow channel inner tooth cooperate to form a labyrinth flow channel, a labyrinth flow channel water inlet is provided on one side of the labyrinth flow channel outer tooth, and the central area of ​​the labyrinth flow channel inner tooth is connected to the water outlet. The purpose of reducing the flow rate can be achieved, but the invention is a single flow channel, and the gear shape of the labyrinth flow channel is not conducive to the discharge of impurities and is easy to cause blockage.

[0004] The patent document with the announcement number CN114145217A discloses a drip irrigation device and an irrigation system having the same. The drip irrigation device includes: a water outlet and a water inlet, a flow channel structure, and the flow channel unit includes: a first energy reduction part, which has a first spiral flow channel, a first vortex chamber, and a second spiral flow channel connected in sequence; a second energy reduction part, which has a third spiral flow channel, a second vortex chamber, and a fourth spiral flow channel connected in sequence; and a direct flow channel. In the drip irrigation device provided by the patent, water flows through the water inlet into the first spiral flow channel and into the first vortex chamber. When the water flows into the first vortex chamber, a vortex is generated in the first vortex chamber, and the water flows into the second spiral flow channel after gathering in the first vortex chamber. When the water flows through the first vortex chamber and enters the second spiral flow channel, it consumes energy, and then passes through the second vortex chamber in the second energy reduction part to further consume the energy of the water flow and reduce the energy of the water flow. However, the invention cannot change the water flow rate, and the multiple rotation design of the vortex chamber is prone to blockage. Summary of the invention

[0005] The invention provides a flow channel variable emitter and method.

[0006] The present invention is achieved through the following technical solutions.

[0007] The present invention provides a flow channel variable emitter, comprising an emitter body and a control device, wherein the emitter body is provided with energy dissipation flow channels A and B, the emitter body is provided with a water inlet head, and one end of the emitter body is connected to the control device.

[0008] Preferably, one end of the emitter body is rotatably connected to the control device, the energy dissipation channel A is formed by channel units connected in series, the number of the channel units is greater than or equal to 2, and the channel units are semi-arc-shaped.

[0009] Preferably, the flow channel unit is bent on both sides of the series connection direction.

[0010] Preferably, the energy dissipation channel B is a spiral tube structure, and the water inlet and the water outlet of the energy dissipation channel B are at the same horizontal position as the water inlet and the water outlet of the energy dissipation channel A.

[0011] Preferably, the diameter of the spiral tube structure of the energy dissipation flow channel B is greater than the diameter of the energy dissipation flow channel A, and the number of turns of the spiral tube structure of the energy dissipation flow channel B is greater than or equal to 2 turns.

[0012] Preferably, a slot is provided in the control device, and a groove A is provided on the inner wall at the bottom of the slot.

[0013] Preferably, a water outlet A is provided on the control device, the water outlet A is communicated with the side wall of the slot, and the cross section of the groove A is in the shape of an arc.

[0014] Preferably, a water inlet A and a socket plug are provided on the water inlet head, and the socket plug is in the shape of a cone, and the small end of the socket plug is located on the side away from the control device.

[0015] Preferably, a water storage tank is provided in the emitter body, the water inlet head is connected to the water storage tank, the water storage tank is connected to the water inlets of energy dissipation channel A and energy dissipation channel B, the emitter body is cylindrical, and an anti-slip strip is provided on the outer wall of one end of the emitter body close to the control device.

[0016] A method for using a variable flow channel emitter comprises the following steps:

[0017] S1: Set the variable flow channel emitter at the desired irrigation location, connect the emitter body to the control device, and after the anti-slip strip is placed in the groove A, connect the water inlet head to the water inlet assembly, and connect the water outlet A to the output assembly to complete the assembly of the variable flow channel emitter.

[0018] S2: Calculate the amount of water required for irrigation, and rotate the control device so that the water inlet of the water outlet A is connected to the water outlet of the energy dissipation channel A or the energy dissipation channel B to adjust the outflow.

[0019] The beneficial effects of the present invention are:

[0020] In the present invention, since the energy dissipation flow channel A and the energy dissipation flow channel B have different flow channels, the outflow rate is different under the same inlet flow rate condition. Therefore, the water outlet A can be aligned with the water outlets of different energy dissipation flow channels according to the different water requirements of different crops, so as to adjust the outflow rate of the sprinkler to meet the irrigation needs of different crops. At the same time, the dual flow channel setting of the energy dissipation flow channel A and the energy dissipation flow channel B of the present invention can continue to use the other flow channel when one of the flow channels is blocked, thereby increasing the durability of the sprinkler. Compared with the existing sprinklers, the two energy dissipation flow channels set in the present invention rely on changing the direction of water flow movement to dissipate energy, have no water blocking parts, will not intercept particulate matter, and have good flow channel anti-blocking performance. At the same time, the sprinkler can adjust the outflow rate according to the actual water requirements of different crops to achieve the optimal irrigation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the energy dissipation flow channel A of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the energy dissipation flow channel A of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the energy dissipation flow channel B of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the control device of the present invention;

[0026] Figure 6 It is a numerical simulation velocity vector distribution diagram of the fluid in the energy dissipation flow channel A of the present invention;

[0027] Figure 7 It is a numerical simulation velocity vector distribution diagram of the fluid in the energy dissipation flow channel B of the present invention;

[0028] Figure 8 It is a distribution diagram of particle motion trajectories in the numerical simulation flow field of the fluid in the energy dissipation flow channel A of the present invention;

[0029] Fig. 9 It is a distribution diagram of particle motion trajectories in the numerical simulation flow field of the fluid in the energy dissipation flow channel B of the present invention;

[0030] Fig.10 It is a pressure-flow relationship curve diagram of the numerical simulation of the energy dissipation flow channel A and the energy dissipation flow channel B of the present invention;

[0031] In the figure: 1-irrigator body, 2-energy dissipation flow channel A, 3-energy dissipation flow channel B, 4-control device, 41-slot, 5-water inlet A, 7-water storage tank, 8-flow channel unit, 9-water outlet A, 10-groove A, 11-anti-slip strip, 12-socket plug, 13-water inlet head. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0033] Example:

[0034] like Figures 1 to 10 As shown, a variable flow channel emitter includes an emitter body 1 and a control device 4. An energy dissipation flow channel A2 and an energy dissipation flow channel B3 are arranged in the emitter body 1. The energy dissipation flow channel A2 and the energy dissipation flow channel B3 make the water flow direction constantly change, generate vortices, increase the consumption of water flow energy, and have an energy dissipation effect. A water inlet head 13 is arranged on the emitter body 1, and one end of the emitter body 1 is connected to the control device 4.

[0035] One end of the emitter body 1 is rotatably connected to the control device 4. The energy dissipation channel A2 is formed by channel units 8 connected in series. The total length L of the energy dissipation channel A2 is 20 mm. There are 8 channel units 8. The channel units 8 are composed of a semi-arc body with an outer diameter of D = 1.6 mm and an inner diameter of d = 1 mm. The channel units 8 are bent on both sides of the series connection direction. When water flows through the channel units 8, it collides with the curved sides of the channel units 8, thereby reducing the energy of the water flow. Under this channel structure parameter, the inlet cross-sectional area of ​​the energy dissipation channel A2 is 1.23 mm 2 , the inlet cross-sectional area of ​​the energy dissipation channel A2 is 0.79mm 2 , the cross-sectional area of ​​the energy dissipation flow channel of the dripper is generally 0.5-1.0mm 2 .

[0036] The energy dissipation channel B3 is a spiral tube structure, and the water inlet and the water outlet of the energy dissipation channel B3 are at the same horizontal position as the water inlet and the water outlet of the energy dissipation channel A2.

[0037] The diameter of the spiral tube structure of the energy dissipation channel B3 is greater than that of the energy dissipation channel A2. The overall length of the energy dissipation channel B3 is 20 mm. The energy dissipation channel B3 is a spiral tube structure with a tube diameter of 1 mm and 10 turns.

[0038] The control device 4 is provided with a slot 41 , and a groove A10 is provided on the bottom inner wall of the slot 41 . The emitter body 1 is inserted into the slot 41 and connected with the control device 4 .

[0039] The control device 4 is provided with a water outlet A9 which is communicated with the side wall of the slot 41 . The groove A10 has an arc-shaped cross section so as to fit with the anti-slip strip 11 to prevent the emitter body 1 from rotating when working.

[0040] The water inlet head 13 is provided with a water inlet A5 and a socket plug 12. The socket plug 12 is in the shape of a conical table. The small end of the socket plug 12 is located on the side away from the control device 4, so that after the socket plug 12 is connected to the connecting pipe of the water inlet component, it can clamp the connecting pipe to form a stable connection.

[0041] A water storage tank 7 is arranged in the emitter body 1, the water inlet A5 of the water inlet head 13 is connected with the water storage tank 7, the water storage tank 7 is connected with the water inlets of the energy dissipation flow channel A2 and the energy dissipation flow channel B3, and the water in the water storage tank 7 is divided along the energy dissipation flow channel A2 and the energy dissipation flow channel B3.

[0042] The emitter body 1 is cylindrical, and an anti-slip strip 11 is arranged on the outer wall of one end of the emitter body 1 close to the control device 4. The anti-slip strip 11 can be placed in the groove A10 for sliding connection.

[0043] A method for using a variable flow channel emitter comprises the following steps:

[0044] S1: Set the variable flow channel emitter at the desired irrigation location, connect the emitter body 1 to the control device 4, and after the anti-slip strip 11 is placed in the groove A10, connect the water inlet head 13 to the water inlet assembly, and connect the water outlet A9 to the output assembly to complete the assembly of the variable flow channel emitter.

[0045] S2: Calculate the amount of water required for irrigation, and rotate the control device 4 so that the water inlet of the water outlet A9 is connected to the water outlet of the energy dissipation channel A2 or the energy dissipation channel B3 to adjust the outflow rate.

[0046] The CFD simulation method is used to perform numerical simulation on the flow velocity vector of the fluid in the energy dissipation flow channel A2 and the energy dissipation flow channel B3 of the present invention. The obtained results are as follows: Figure 5 , 6 As shown. Figure 5 It can be seen that the water flow generates a vortex in the flow channel unit 8 and occupies a part of the flow channel area. The impact of the water flow on the flow channel wall and the collision between the turbulent water flows in the vortex greatly consume the energy of the water flow. Figure 6 It can be seen that the direction of the flow channel changes continuously, causing the direction of the water flow to change, causing the water flow to collide with the side wall of the energy dissipation channel B3 and the fluid, consuming the water flow energy.

[0047] The CFD simulation method is used to perform numerical simulation on the motion trajectory of fluid particles in the energy dissipation flow channel A2 and the energy dissipation flow channel B3 of the present invention. The particle size is set to 0.1 mm. The results are as follows: Figure 7 , 8 As shown. Figure 7 It can be seen that most of the particles are distributed on both sides of the energy dissipation channel A2. The energy dissipation channel A2 has no water retaining parts. The particles pass through the energy dissipation channel A2 quickly under the water flow without swirling. The energy dissipation channel A2 has good anti-blocking performance. Figure 8 It can be seen that the particles are concentrated in the central mainstream area of ​​the energy dissipation channel B3 and pass through the energy dissipation channel B3 quickly with the water flow without swirling. The energy dissipation channel B3 has good anti-blocking performance.

[0048] The pressure-flow relationship curve diagram of the energy dissipation flow channel A2 and the energy dissipation flow channel B3 of the present invention is obtained by numerical simulation, as shown in FIG. Fig. 9 As shown in the figure, the horizontal axis is the water inlet pressure, unit is m, and the vertical axis is the average flow rate, unit is L / h. Figure 8 , 9 The flow index of energy dissipation channel A2 is 0.5821, and the flow index of energy dissipation channel B3 is 0.5767, which meets the hydraulic performance requirements of the emitter. Under the same pressure conditions, the flow rate of energy dissipation channel A2 is smaller than that of energy dissipation channel B3. Under different crop water demand conditions, the water outlet channel can be adjusted by rotating the flow channel control device 4 to change the outlet flow rate.

[0049] The invention is suitable for use with a drip irrigation emitter.

Claims

1. A variable flow channel emitter, characterized in that: The invention comprises an emitter body (1) and a control device (4), wherein an energy dissipation flow channel A (2) and an energy dissipation flow channel B (3) are arranged in the emitter body (1), a water inlet head (13) is arranged on the emitter body (1), and one end of the emitter body (1) is connected to the control device (4).

2. A variable flow channel emitter as claimed in claim 1, characterized in that: One end of the emitter body (1) is rotatably connected to the control device (4); the energy dissipation channel A (2) is formed by channel units (8) connected in series; the number of the channel units (8) is greater than or equal to 2; and the channel units (8) are semi-arc shaped.

3. A variable flow channel emitter as claimed in claim 2, characterized in that: The flow channel unit (8) is arranged in a curved manner on both sides of the series connection direction.

4. A variable flow channel emitter as claimed in claim 1, characterized in that: The energy dissipation channel B (3) is a spiral tube structure, and the water inlet and the water outlet of the energy dissipation channel B (3) are at the same horizontal position as the water inlet and the water outlet of the energy dissipation channel A (2).

5. A variable flow channel emitter as claimed in claim 4, characterized in that: The diameter of the spiral tube structure of the energy dissipation channel B (3) is greater than the diameter of the energy dissipation channel A (2), and the number of turns of the spiral tube structure of the energy dissipation channel B (3) is greater than or equal to 2 turns.

6. A variable flow channel emitter as claimed in claim 1, characterized in that: A slot (41) is provided in the control device (4), and a groove A (10) is provided on the inner wall at the bottom of the slot (41).

7. A variable flow channel emitter as claimed in claim 6, characterized in that: The control device (4) is provided with a water outlet A (9), the water outlet A (9) is communicated with the side wall of the slot (41), and the cross section of the groove A (10) is in the shape of an arc.

8. The variable flow channel emitter according to claim 1, characterized in that: The water inlet head (13) is provided with a water inlet A (5) and a receiving plug (12), wherein the receiving plug (12) is in the shape of a cone, and the small end of the receiving plug (12) is located at a side away from the control device (4).

9. The variable flow channel emitter according to claim 1, characterized in that: A water storage tank (7) is arranged in the emitter body (1), the water inlet head (13) is connected to the water storage tank (7), the water storage tank (7) is connected to the water inlets of the energy dissipation flow channel A (2) and the energy dissipation flow channel B (3), the emitter body (1) is cylindrical, and an anti-slip strip (11) is arranged on the outer wall of one end of the emitter body (1) close to the control device (4).

10. A method for using the variable flow channel emitter according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: The variable flow channel emitter is set at the desired irrigation location, the emitter body (1) is connected to the control device (4), and after the anti-slip strip (11) is placed in the groove A (10), the water inlet head (13) is connected to the water inlet assembly, and the water outlet A (9) is connected to the output assembly, thereby completing the assembly of the variable flow channel emitter; S2: Calculate the amount of water required for irrigation, and by rotating the control device (4), connect the water inlet of the water outlet A (9) with the water outlet of the energy dissipation channel A (2) or the energy dissipation channel B (3), so as to adjust the outflow rate.

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