A swirl collision type flow channel anti-clogging dripper

Abstract

The present invention provides a swirl collision type flow channel anti-clogging dripper, including a collision flow channel and an arc-shaped baffle; at least one turning flow channel with a turning angle greater than 90 degrees is provided in the collision flow channel; a plurality of arc-shaped baffles are provided along the flow direction of the collision flow channel, and the plurality of arc-shaped baffles form a labyrinth channel, and the liquid medium is output in a dripping manner at the outlet of the collision flow channel through the collision of the liquid medium with the arc-shaped baffles. The arc-shaped baffle includes a plurality of baffle assemblies uniformly distributed in the collision flow channel along the flow direction; the baffle assembly includes a first arc-shaped long baffle, a second arc-shaped long baffle, a first arc-shaped short baffle and a second arc-shaped short baffle. The present invention uses a special arrangement of long and short arc-shaped baffles to make water flows collide with each other, and water flows collide with pipe walls and baffles, which plays a good energy dissipation role for the traveling water flow.

Description

Technical Field

[0001] The invention relates to the field of agricultural water-saving irrigation, and in particular to a swirl collision type flow channel anti-clogging dripper. Background Art

[0002] Drip irrigation is an irrigation technology characterized by low water flow. Water drips near the plant or its root zone through the emitter. This irrigation method improves the efficiency of irrigation water utilization by reducing evaporation of irrigation surface water, runoff and deep groundwater infiltration losses. In order to effectively alleviate the shortage of agricultural water in my country, realize scientific water use in farmland, give full play to the advantages of water-saving irrigation technology, and improve the level of modernization of crop planting, drip irrigation technology has become one of the most effective water-saving irrigation methods and an important means to ensure increased production and income. As the most critical component in the irrigation system, the structural dimensions of the emitter have a significant impact on the uniformity and anti-clogging ability of the drip irrigation system. Poor design of the emitter flow channel structure and dimensions will lead to poor irrigation uniformity, emitter blockage and many other problems. Therefore, studying the relationship between the emitter flow channel structure parameters and hydraulic performance has always been a hot topic in the field of water-saving irrigation.

[0003] A prior art vortex-type drip irrigation device, the labyrinth flow channel of which is composed of a number of identical and connected triangular channels and vortex cavities connected in series, has a certain anti-blocking performance, but the labyrinth arrangement of the triangular channels cannot better ensure the energy loss of water flow. A prior art leaf vein drip irrigation device, which mainly achieves the purpose of energy dissipation and water saving through the leaf vein flow channel structure, but does not take into account the problem of easy blockage of the water flow channel.

[0004] Hydraulic performance and anti-clogging performance are two important indicators for evaluating the performance of water emitters, but there is a certain conflict between the two in the structural design of the water emitter flow channel. The former requires the flow channel to be slender and tortuous, while the latter requires the flow channel to be short and wide. Therefore, these two factors should be considered comprehensively when designing the water emitter flow channel. According to the structure of the water emitter flow channel and the energy dissipation method, the commonly used water emitters are mainly divided into turbulent maze type and pressure compensation type. The former has a simpler structure and a long service life, but the energy dissipation method is relatively simple. Although the latter has obvious pressure regulation and flow stabilization effects, it has a more complex structure, and the internal elastic diaphragm is easy to deform, which reduces the pressure regulation and flow stabilization performance, and the diaphragm deformation is difficult to accurately control. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a swirl collision type flow channel anti-clogging dripper, which, through the special arrangement of long and short arc-shaped baffles, makes the water flows collide with each other, and the water flows and the pipe walls and baffles collide with each other, which has a good energy dissipation effect on the moving water flow.

[0006] The present invention achieves the above technical objectives through the following technical means.

[0007] A swirl collision type flow channel anti-clogging dripper comprises a collision flow channel and an arc baffle; the collision flow channel is provided with at least one turning flow channel with a turning angle greater than 90 degrees; a plurality of arc baffles are provided along the flow direction of the collision flow channel, the plurality of arc baffles form a labyrinth channel, and the liquid medium at the water outlet of the collision flow channel is output in a dripping manner through the collision of the liquid medium with the arc baffles.

[0008] Further, the arc-shaped baffle includes a plurality of baffle assemblies evenly distributed in the collision flow channel along the flow direction; the baffle assembly includes a first arc-shaped long baffle, a second arc-shaped long baffle, a first arc-shaped short baffle and a second arc-shaped short baffle; the first arc-shaped long baffle, the second arc-shaped long baffle, the first arc-shaped short baffle and the second arc-shaped short baffle are staggered; the second arc-shaped long baffle and the first arc-shaped short baffle are tilted and distributed along a direction perpendicular to the flow direction, and one end of the first arc-shaped long baffle, one end of the second arc-shaped long baffle, one end of the first arc-shaped short baffle and one end of the second arc-shaped short baffle are respectively provided with gaps with two parallel walls of the collision flow channel, and a gap is provided between the other end of the second arc-shaped long baffle and the other end of the first arc-shaped short baffle.

[0009] Furthermore, the second arc-shaped long baffle and the first arc-shaped short baffle are in a wavy line shape; an extension line of an outer arc at the other end of the second arc-shaped long baffle is tangent to an extension line of an inner arc at the other end of the first arc-shaped short baffle.

[0010] Further, the first arc-shaped long baffle is located in front of the entrance of the gap between the second arc-shaped long baffle and the first arc-shaped short baffle; the second arc-shaped short baffle is located obliquely rearward of the exit of the gap between the second arc-shaped long baffle and the first arc-shaped short baffle.

[0011] Furthermore, the liquid medium is divided into a mainstream and a branch flow by the baffle assembly; wherein the mainstream is a flow channel flowing through the gap between any two baffles among the first arc-shaped long baffle, the second arc-shaped long baffle, the first arc-shaped short baffle and the second arc-shaped short baffle; the branch flow is a flow channel flowing through the gap between any one baffle and the wall among the first arc-shaped long baffle, the second arc-shaped long baffle, the first arc-shaped short baffle and the second arc-shaped short baffle; a vortex is formed by the collision of the branch flow with the mainstream for swirl collision.

[0012] Furthermore, the acute angle formed by the line connecting the starting point and the end point of the inner arc of each of the first arc-shaped long baffle, the second arc-shaped long baffle, the first arc-shaped short baffle and the second arc-shaped short baffle and the wall surface is in the range of 20° to 70°.

[0013] Further, a gap L4 between one end of each of the first arc-shaped long baffle, the second arc-shaped long baffle, the first arc-shaped short baffle and the second arc-shaped short baffle and the wall surface is in a range of 0.125-0.2 mm.

[0014] Furthermore, the vertical distances from the start point to the end point of the outer arcs of the first arc-shaped long baffle and the second arc-shaped long baffle are both 2-3 mm; the vertical distances from the start point to the end point of the outer arcs of the first arc-shaped short baffle and the second arc-shaped short baffle are both 1-3 mm.

[0015] The beneficial effects of the present invention are:

[0016] 1. The anti-clogging dripper of the swirl collision flow channel described in the present invention, through the special arrangement of long and short arc baffles, makes the water flow collide with each other, and the water flow and the pipe wall and baffle collide with each other, which plays a good role in dissipating energy for the moving water flow. In addition, at least one turning flow channel with a turning angle greater than 90 degrees is provided in the collision flow channel of the present invention, so that the moving water flow can collide and dissipate energy more fully, greatly improving the energy dissipation effect.

[0017] 2. The swirl collision type flow channel anti-clogging dripper described in the present invention adopts an arc-shaped baffle, which can make it easier for the liquid flows to collide and generate vortices, and can reduce the accumulation of impurities in the flow channel. Compared with the common maze flow channel sprinkler, the present invention has gaps between the arc-shaped baffles and between the arc-shaped baffles and the pipe wall, and is an open flow channel, which greatly reduces the possibility of pipeline blockage, increases the service life of the sprinkler, and saves the cost of farmland irrigation.

[0018] 3. The swirl collision type flow channel anti-clogging dripper described in the present invention has a simple structure and low cost, and can be widely used in agricultural water-saving irrigation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. The drawings described below are some embodiments of the present invention. For ordinary technicians in this field, it is obvious that other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the swirl collision type flow channel anti-clogging dripper described in the present invention.

[0021] Figure 2 It is a top view of the structure of the present invention.

[0022] Figure 3 The present invention simulates the liquid flow field inside the dripper.

[0023] Figure 4 This is a velocity streamline diagram simulated by CFD in the present invention.

[0024] In the figure:

[0025] 1-water inlet; 2-water outlet; 3-water retaining wall; 4-first arc-shaped long baffle; 5-second arc-shaped long baffle; 6-first arc-shaped short baffle; 7-second arc-shaped short baffle; 8-first water passage; 9-second water passage. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 limiting 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 or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figure 1 and Figure 2 As shown, the swirl collision type flow channel anti-clogging dripper described in the present invention includes a collision flow channel and a curved baffle; at least one turning flow channel with a turning angle greater than 90 degrees is provided in the collision flow channel; a plurality of curved baffles are provided along the flow direction of the collision flow channel, and the plurality of curved baffles form a maze channel, and the liquid medium is output in a dripping manner at the water outlet 2 of the collision flow channel through the collision of the liquid medium with the curved baffles. The use of the curved baffle can make it easier for the liquid flow to collide to generate a vortex.

[0030] The arc-shaped baffle includes a plurality of baffle assemblies uniformly distributed in the collision flow channel along the flow direction; the baffle assembly includes a first arc-shaped long baffle 4, a second arc-shaped long baffle 5, a first arc-shaped short baffle 6 and a second arc-shaped short baffle 7; the first arc-shaped long baffle 4, the second arc-shaped long baffle 5, the first arc-shaped short baffle 6 and the second arc-shaped short baffle 7 are staggered; in the collision flow channel, the baffle assemblies are staggered in 2 rows and 2 columns, the first arc-shaped long baffle 4 and the first arc-shaped short baffle 6 are located in the second row, and the second arc-shaped long baffle 5 and the second arc-shaped short baffle 7 are located in the first row. The second arc-shaped long baffle 5 and the first arc-shaped short baffle 6 are inclinedly distributed along the direction perpendicular to the flow direction, and one end of the first arc-shaped long baffle 4, one end of the second arc-shaped long baffle 5, one end of the first arc-shaped short baffle 6 and one end of the second arc-shaped short baffle 7 are respectively provided with gaps with the two parallel walls of the collision flow channel, and a gap is provided between the other end of the second arc-shaped long baffle 5 and the other end of the first arc-shaped short baffle 6.

[0031] like Figure 2 As shown, the second arc-shaped long baffle 5 and the first arc-shaped short baffle 6 are in a wavy line shape; the extension line of the outer arc of the other end of the second arc-shaped long baffle 5 is tangent to the extension line of the inner arc of the other end of the first arc-shaped short baffle 6. The first arc-shaped long baffle 4 is located in front of the entrance of the gap between the second arc-shaped long baffle 5 and the first arc-shaped short baffle 6; the second arc-shaped short baffle 7 is located obliquely behind the exit of the gap between the second arc-shaped long baffle 5 and the first arc-shaped short baffle 6.

[0032] like Figure 3 As shown, the liquid medium entering the collision channel is divided into a mainstream and a tributary by the baffle assembly; wherein the mainstream is a flow channel flowing through the gap between any two baffles among the first arc-shaped long baffle 4, the second arc-shaped long baffle 5, the first arc-shaped short baffle 6 and the second arc-shaped short baffle 7; the tributary is a flow channel flowing through the gap between any one of the first arc-shaped long baffle 4, the second arc-shaped long baffle 5, the first arc-shaped short baffle 6 and the second arc-shaped short baffle 7 and the wall surface; the tributary includes a first water passage 8 and a second water passage 9, the first water passage 8 is the gap between the upper wall surface and the second arc-shaped long baffle 5 and the second arc-shaped short baffle 7, and the second water passage 9 is the gap between the lower wall surface and the first arc-shaped long baffle 4 and the first arc-shaped short baffle 6. The tributary forms a vortex when it collides with the mainstream, which is used for swirl collision, and the flow velocity is reduced again to achieve the purpose of energy loss. At the same time, the existence of the vortex prevents a large number of solid particles from being blocked in the collision channel, thereby extending the service life of the dripper.

[0033] The acute angle α formed by the line connecting the starting point and the end point of the inner arc of each of the first arc-shaped long baffle 4, the second arc-shaped long baffle 5, the first arc-shaped short baffle 6 and the second arc-shaped short baffle 7 and the wall surface is in the range of 20° to 70°.

[0034] The gap L4 between one end of each of the first arc-shaped long baffle 4, the second arc-shaped long baffle 5, the first arc-shaped short baffle 6 and the second arc-shaped short baffle 7 and the wall surface is in the range of 0.125-0.2 mm.

[0035] The vertical distance L2 from the start point to the end point of the outer arc of the first arc-shaped long baffle 4 is 2-3 mm; the vertical distance L7 from the start point to the end point of the outer arc of the second arc-shaped long baffle 5 is 2-3 mm; the vertical distance L6 from the start point to the end point of the outer arc of the first arc-shaped short baffle 6 is 1-3 mm. The vertical distance L3 from the start point to the end point of the outer arc of the second arc-shaped short baffle 7 is 1-3 mm.

[0036] The collision channel in the embodiment includes a channel with a turning angle of 180 degrees, the length L1 of the collision channel is 40 mm to 50 mm, and the width L5 of the collision channel is 8 mm to 12 mm. One end of the collision channel is a water inlet 1, and one end of the collision channel is a water outlet 2. The side wall of the collision channel is a water retaining wall 3.

[0037] The working principle of the open-channel anti-clogging dripper with swirl collision described in the present invention is to achieve the effect of energy dissipation through the collision between the water flow and the baffles and walls, as well as the mutual impact and mixing of the mainstream and tributaries. When the water flow enters from the water inlet 1, due to the presence of long and short arc-shaped baffles, the water flow will be divided into the mainstream and tributaries. Then the tributaries will hit the wall of the water flow channel, lose energy, and then change direction and turn around to merge with the mainstream. Since the two streams flow in opposite directions, they will lose part of the energy between each set of long and short baffles, and after passing through several long and short baffles, they will lose most of the energy, resulting in most of the energy of the liquid being offset when it flows to the water outlet 2, achieving a better energy dissipation effect.

[0038] When water flows collide with each other, they can reduce the accumulation of impurities in the flow channel and make the impurities flow forward. The gap between the baffle and the pipe wall can better discharge the flowing impurities from the emitter outlet, greatly reducing the possibility of pipeline blockage, increasing the service life of the emitter and saving the cost of farmland irrigation.

[0039] like Figure 3As shown, after the fluid enters the device, it is divided into a mainstream (solid arrow) and a tributary (dashed arrow). The mainstream flows in the channels formed between the first arc-shaped long baffle 4, the second arc-shaped long baffle 5, the first arc-shaped short baffle 6 and the second arc-shaped short baffle 7. Part of the tributary moves along the first water-passing channel 8 and the second water-passing channel 9 close to the water retaining wall 3. After the inlet water flow hits the first arc-shaped long baffle 4, it forms a reverse water flow that collides with the mainstream to form a vortex. Part of the water flow merges with the mainstream, and the water flow continues to flow and hits the second arc-shaped long baffle 5. A part of the water forms a reverse flow and collides with the mainstream to form a vortex, and the other part of the water flows along the second arc-shaped long baffle 5 from the gap between the second arc-shaped long baffle 5 and the first arc-shaped short baffle 6 to the second arc-shaped short baffle 7. At this time, the water flow is divided again, and the mainstream flows to the next first arc-shaped long baffle 4. The upper tributary collides with the second arc-shaped short baffle 7 and merges with the tributary in the first water flow channel 8. The lower tributary merges with the second water flow channel 9 along the first arc-shaped short baffle 6. The water flows through the entire device in this regular pattern and finally flows out from the water outlet 2. The water flow loses energy in the continuous diversion and collision, and the vortex formed can prevent solid particles from being retained in the device and causing blockage, playing a role in energy dissipation and anti-blocking.

[0040] like Figure 4 As shown, the flow and collision of water flow are similar to Figure 3 It is basically consistent. Since the baffle is arc-shaped and the water flow will form a vortex near the baffle after collision, it will not cause blockage even in the low-speed area with more impurities near the arc-shaped baffle, which confirms the feasibility of the case.

[0041] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0042] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A swirl collision type flow channel anti-clogging dripper, characterized in that: It comprises a collision channel and an arc-shaped baffle; the collision channel is provided with at least one turning channel with a turning angle greater than 90 degrees; a plurality of arc-shaped baffles are provided along the flow direction of the collision channel, the plurality of arc-shaped baffles form a labyrinth channel, and the liquid medium is discharged in a dripping manner from the water outlet (2) of the collision channel by the collision of the liquid medium with the arc-shaped baffles; The arc-shaped baffle comprises a plurality of baffle assemblies uniformly distributed in the collision flow channel along the flow direction; the baffle assembly comprises a first arc-shaped long baffle (4), a second arc-shaped long baffle (5), a first arc-shaped short baffle (6) and a second arc-shaped short baffle (7); the first arc-shaped long baffle (4), the second arc-shaped long baffle (5), the first arc-shaped short baffle (6) and the second arc-shaped short baffle (7) are staggered; the second arc-shaped long baffle (5) and the first arc-shaped short baffle (6) are tiltedly distributed along a direction perpendicular to the flow direction; one end of the first arc-shaped long baffle (4), one end of the second arc-shaped long baffle (5), one end of the first arc-shaped short baffle (6) and one end of the second arc-shaped short baffle (7) are respectively provided with gaps with two parallel wall surfaces of the collision flow channel, and a gap is provided between the other end of the second arc-shaped long baffle (5) and the other end of the first arc-shaped short baffle (6).

2. The swirl collision type flow channel anti-clogging dripper according to claim 1, characterized in that: The second arc-shaped long baffle (5) and the first arc-shaped short baffle (6) are in the shape of a wave line; the extension line of the outer arc of the other end of the second arc-shaped long baffle (5) is tangent to the extension line of the inner arc of the other end of the first arc-shaped short baffle (6).

3. The swirl collision type flow channel anti-clogging dripper according to claim 1, characterized in that: The first arc-shaped long baffle (4) is located in front of the entrance of the gap between the second arc-shaped long baffle (5) and the first arc-shaped short baffle (6); the second arc-shaped short baffle (7) is located obliquely rearward of the exit of the gap between the second arc-shaped long baffle (5) and the first arc-shaped short baffle (6).

4. The swirl collision type flow channel anti-clogging dripper according to claim 1, characterized in that: The liquid medium is divided into a main flow and a branch flow by the baffle assembly; wherein the main flow is a flow channel flowing through the gap between any two of the first arc-shaped long baffle (4), the second arc-shaped long baffle (5), the first arc-shaped short baffle (6) and the second arc-shaped short baffle (7); the branch flow is a flow channel flowing through the gap between any one of the first arc-shaped long baffle (4), the second arc-shaped long baffle (5), the first arc-shaped short baffle (6) and the second arc-shaped short baffle (7) and the wall surface; and a vortex is formed by the collision of the branch flow with the main flow for swirl collision.

5. The swirl collision type flow channel anti-clogging dripper according to any one of claims 2 to 4, characterized in that: The acute angle formed by the line connecting the starting point and the end point of the inner arc of each of the first arc-shaped long baffle (4), the second arc-shaped long baffle (5), the first arc-shaped short baffle (6) and the second arc-shaped short baffle (7) and the wall surface is in the range of 20° to 70°.

6. The swirl collision type flow channel anti-clogging dripper according to any one of claims 2 to 4, characterized in that: The gap between one end of each of the first arc-shaped long baffle (4), the second arc-shaped long baffle (5), the first arc-shaped short baffle (6) and the second arc-shaped short baffle (7) and the wall surface is in the range of 0.125-0.2 mm.

7. The swirl collision type flow channel anti-clogging dripper according to any one of claims 2 to 4, characterized in that: The vertical distances from the start point to the end point of the outer arcs of the first arc-shaped long baffle (4) and the second arc-shaped long baffle (5) are both 2-3 mm; the vertical distances from the start point to the end point of the outer arcs of the first arc-shaped short baffle (6) and the second arc-shaped short baffle (7) are both 1-3 mm.

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