A Y-shaped drip irrigation emitter

Abstract

The present invention relates to a Y-shaped drip irrigation emitter, which includes water inlets and water outlets provided at both ends. A labyrinth flow channel is provided between the water inlets and the water outlets. The labyrinth flow channel has a bottom planar side wall and a top planar side wall. The labyrinth flow channel includes a plurality of identical flow channel units connected in series and communicating with each other in sequence. In any flow channel unit, a forward-fixed "Y"-shaped tooth and a backward-fixed "Y"-shaped tooth are sequentially arranged, forming a positive "Y"-shaped flow channel and an inverted "Y"-shaped flow channel in the flow channel unit. When the flow channel size of the present invention is the same as that of the existing emitter, its hydraulic performance is greatly improved compared with the latter; or on the basis of the hydraulic performance of the existing emitter, its flow channel width can be increased by about 50%, greatly improving the anti-clogging performance of the emitter. The present invention solves the problem of the contradiction between the pursuit of hydraulic performance and anti-clogging performance of the labyrinth flow channel emitter, enabling it to have good hydraulic performance and anti-clogging performance at the same time.

Description

Technical Field

[0001] The present invention belongs to the technical field of water-saving irrigation. Specifically, it is a "Y"-shaped drip irrigation emitter for irrigation. Background Art

[0002] With the development process of agricultural informatization and modernization, drip irrigation technology has been effectively applied in the agricultural field. Drip irrigation technology can meet the actual water requirements of crops by accurately delivering water, so as to meet the water needed for crop growth. Therefore, drip irrigation technology realizes more refined and precise irrigation, which plays an important role in efficient water conservation. First of all, the water-saving effect of drip irrigation technology is remarkable, and it can meet the water required for crop growth during uniform and accurate irrigation; secondly, drip irrigation technology realizes refined irrigation, which can irrigate the roots of crops, and the growth of weeds and the like is reduced due to dryness around the roots, which helps to improve the fertilizer utilization rate of crops; thirdly, in the production of informatized agriculture, the application of drip irrigation technology can achieve informatized control. By establishing a micro-irrigation automatic control system, the quality of agricultural production can be improved in more precise and informatized technology applications.

[0003] The labyrinth drip irrigation emitter is a widely used emitter form at home and abroad at present. It mainly uses the turbulence of water flow to achieve the purpose of energy dissipation and pressure reduction. The working mechanism is as follows: under the action of a complex and curved flow channel structure, the water flow in the flow channel maintains a turbulent state of motion and is accompanied by vortices, which will generate a large local head loss, eliminating the excess working pressure at the inlet of the drip irrigation emitter, so that the change in the discharge of the emitter caused by the change in the working pressure of the emitter is smaller, and the irrigation uniformity is higher. This type of emitter has excellent hydraulic performance and low manufacturing cost, so it is widely used.

[0004] The emitter is the most critical component of the entire drip irrigation project. The quality of its performance greatly determines the irrigation quality of the overall project benefit. At present, the research focus of drip irrigation experts is to increase the cross-sectional size of the flow channel, change the form of the flow channel structure, etc., to improve the uniformity of water discharge, enhance the anti-blocking ability of the flow channel, ensure that the emitter has good working performance under certain pressure conditions, and improve the service life of the emitter.

[0005] Referring to the existing widely used rectangular labyrinth flow channel emitter, the height of the flow channel unit is 4 mm, the width of the flow channel is 1 mm, the depth is 1 mm, and the total length of the flow channel is 300 mm. It is composed of 50 flow channel units in series, and its water discharge is 1.95 - 2.90 L / h under the working pressure of 5 - 10 m H 2 O.

[0006] Based on this, there is a need for a flow channel structure in which the water emitter is difficult to clog even under the condition of high sediment content in the irrigation water, while ensuring certain hydraulic performance and discharge to solve the problems that the current water emitter is extremely prone to scaling and clogging, and the contradiction between the pursuit of hydraulic performance and anti-clogging performance. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a "Y"-shaped drip irrigation emitter with excellent energy dissipation effect, uniform water outlet, not easy to clog and simple structure.

[0008] To solve the above technical problems, the technical solution adopted by the present invention is:

[0009] A "Y"-shaped drip irrigation emitter includes water inlets and water outlets provided at both ends. A labyrinth flow channel is provided between the water inlets and the water outlets. The labyrinth flow channel has a bottom planar side wall and a top planar side wall. The labyrinth flow channel includes a plurality of sequentially connected and identical flow channel units connected in series. In any flow channel unit, a forward-fixed "Y"-shaped tooth and a backward-fixed "Y"-shaped tooth are sequentially arranged, forming a positive "Y"-shaped flow channel and an inverted "Y"-shaped flow channel in the flow channel unit; on both sides of the "Y"-shaped tooth, fan-shaped flow channel side walls and pointed-tooth-shaped flow channel side walls are symmetrically formed. At the front end of the "Y"-shaped tooth, two arc-shaped pointed teeth are symmetrically formed towards both sides. The inner side wall of the arc-shaped pointed tooth is an arc surface, and a V-shaped groove is formed between the inner side walls of the two arc-shaped pointed teeth; wherein, the root of the forward-fixed "Y"-shaped tooth is fixedly arranged on the bottom planar side wall of the labyrinth flow channel, and the root of the backward-fixed "Y"-shaped tooth is fixedly arranged on the top planar side wall of the labyrinth flow channel.

[0010] Further, the radius of the pointed-tooth-shaped flow channel side wall formed on both sides of the "Y"-shaped tooth is 2.1 - 3.1 mm.

[0011] Further, the radius of the fan-shaped flow channel side wall formed on both sides of the "Y"-shaped tooth is 1 - 1.5 mm. Further, the radius of the inner side wall of the two arc-shaped pointed teeth is 1.2 - 1.7 mm.

[0012] Further, the vertical distance from the tip of the arc-shaped pointed tooth of the forward-fixed "Y"-shaped tooth to the top planar side wall of the labyrinth flow channel is 1.7 mm - 2.6 mm.

[0013] Further, the vertical distance from the tip of the arc-shaped pointed tooth of the backward-fixed "Y"-shaped tooth to the bottom planar side wall of the labyrinth flow channel is 1.7 mm - 2.6 mm.

[0014] Further, the vertical distance from the bottom end of the arc-shaped pointed tooth of the forward-fixed "Y"-shaped tooth to the top planar side wall is 1 mm - 1.5 mm.

[0015] Further, the vertical distance from the bottom end of the arc-shaped pointed teeth of the reversely fixed "Y"-shaped teeth to the bottom plane side wall is 1 mm - 1.5 mm.

[0016] Further, the depths of the water inlet, the water outlet, and the labyrinth flow channel are all 1 mm.

[0017] In the present invention, a completely new flow channel structure form is formed by the "Y"-shaped teeth. The two formed fan-shaped flow channels are connected to each other, causing the water flow direction to deflect at a large angle within a short distance. Subsequently, a pointed-tooth-shaped flow channel is connected, and large-intensity vortices are formed at the position of the pointed teeth. The bent flow channel structure and the existence of the vortices consume a large amount of energy of the water flow, improving the hydraulic performance of the water emitter. Coupled with the conversion of the water flow potential energy and kinetic energy, the purpose of reducing the water flow velocity inside the water emitter is achieved. Based on this, the cross-sectional size of the flow channel can be increased significantly, and the hydraulic performance and design flow rate are consistent with those of the existing traditional labyrinth water emitters, thereby improving the anti-clogging performance.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects: when the size parameters are the same as those of the traditional water emitter, due to the obstruction of the "Y"-shaped teeth to the water flow, the water flow direction changes rapidly, and multiple vortices of different sizes and intensities are generated, greatly increasing the consumption of the water flow energy. At the same time, the continuous scouring of the vortices on the side wall of the flow channel also makes the water emitter not easy to be blocked, and it has excellent hydraulic performance, and the water outlet uniformity is significantly improved.

[0019] Compared with the existing traditional water emitters, within the same length range of the flow channel, the cross-sectional size of the flow channel can be increased by about 50%. Its hydraulic performance is the same as that of the traditional water emitter, but the cross-sectional size of the flow channel increases significantly, resulting in a great improvement in the anti-clogging performance.

[0020] The "Y"-shaped drip irrigation emitter provided by the present invention has a simple flow channel structure, low requirements for manufacturing processes, low production costs, good working performance, and a wide range of applications. Description of the Drawings

[0021] The drawings here are used to provide further illustration of the present invention, and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute an improper limitation to the present invention.

[0022] Figure 1 It is a schematic structural diagram of the "Y"-shaped drip irrigation emitter provided by the present invention.

[0023] Figure 2 It is a schematic structural diagram of a single flow channel unit of the "Y"-shaped drip irrigation emitter provided by the present invention.

[0024] Figure 3 It is a schematic partial structural diagram of the "Y"-shaped drip irrigation emitter provided by the present invention.

[0025] Figure 4 It is a partial velocity vector diagram of the "Y"-shaped drip irrigation emitter provided by the present invention.

[0026] Figure 5 It is a flow rate-pressure performance curve diagram of the "Y"-shaped drip irrigation emitter provided by the present invention.

[0027] In the figure: 1 - water inlet; 2 - water outlet; 3 - labyrinth flow channel; 4 - positive "Y"-shaped flow channel; 5 - inverted "Y"-shaped flow channel; 6 - positive "Y"-shaped teeth; 7 - first fan-shaped flow channel; 8 - first pointed-tooth-shaped flow channel; 9 - second fan-shaped flow channel; 10 - inverted "Y"-shaped teeth; 11 - third fan-shaped flow channel; 12 - second pointed-tooth-shaped flow channel; 13 - fourth fan-shaped flow channel, 14 - bottom plane side wall, 15 - top plane side wall, 16 - side wall of the pointed-tooth-shaped flow channel, 17 - side wall of the fan-shaped flow channel, 18 - arc-shaped pointed teeth, 19 - inner side wall. Detailed implementation manners

[0028] In order to enable those skilled in the art to better understand the present invention, the present invention will be further clearly and completely described below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, without conflict, the implementation manners and features in the embodiments of the present application can be combined with each other.

[0029] A "Y"-shaped drip irrigation emitter provided by a typical embodiment of the present invention includes a water inlet 1 and a water outlet 2 provided at both ends. A labyrinth flow channel 3 is provided between the water inlet 1 and the water outlet 2, and the labyrinth flow channel 3 has a bottom plane side wall 14 and a top plane side wall 15.

[0030] The labyrinth flow channel 3 includes a plurality of sequentially connected and identical flow channel units connected in series. In any flow channel unit, a forward-fixed "Y"-shaped tooth and a backward-fixed "Y"-shaped tooth are sequentially arranged to form a positive "Y"-shaped flow channel 4 and an inverted "Y"-shaped flow channel 5 in the flow channel unit.

[0031] In this embodiment, the water inlet is connected to the starting end of the labyrinth flow channel; the water outlet is connected to the ending end of the labyrinth flow channel and spreads outwards for drip irrigation. The forward-fixed "Y"-shaped tooth is denoted as the positive "Y"-shaped tooth 6, and the backward-fixed "Y"-shaped tooth is denoted as the inverted "Y"-shaped tooth 10. Both the positive "Y"-shaped flow channel 4 and the inverted "Y"-shaped flow channel 5 are irregular in shape. The positive "Y"-shaped flow channel 4 includes a first fan-shaped flow channel 7, a first pointed-tooth-shaped flow channel 8, and a second fan-shaped flow channel 9 that are sequentially connected; the inverted "Y"-shaped flow channel 5 includes a third fan-shaped flow channel 11, a second pointed-tooth-shaped flow channel 12, and a fourth fan-shaped flow channel 13 that are sequentially connected.

[0032] On both sides of the "Y"-shaped tooth, symmetrically formed are the pointed-tooth-shaped runner side wall 16 and the fan-shaped runner side wall 17. At the front end of the "Y"-shaped tooth, symmetrically formed towards both sides are two arc-shaped pointed teeth 18. The inner side wall 19 of the arc-shaped pointed tooth 18 is an arc surface, and a V-shaped groove is formed between the inner side walls 19 of the two arc-shaped pointed teeth 18. Among them, the root of the "Y"-shaped tooth fixed in the forward direction is fixedly arranged on the bottom plane side wall 14 of the labyrinth runner, and the root of the "Y"-shaped tooth fixed in the reverse direction is fixedly arranged on the top plane side wall 15 of the labyrinth runner. The "Y"-shaped tooth is a solid structure similar to the capital English letter "Y", and the outer pointed-tooth-shaped runner side wall 16, the fan-shaped runner side wall 17, and the inner side wall 19 of the arc-shaped pointed tooth 18 are all arc-shaped.

[0033] According to the above embodiments, the irrigation water flows through the positive "Y"-shaped runner 4 of the runner unit, and a fully developed long-strip vortex is formed at the entire runner edge of the first fan-shaped runner 7, consuming part of the energy and changing the water flow direction at the same time. The water flow flowing out of the first fan-shaped runner 7 flows into the first pointed-tooth-shaped runner 8, and a large-intensity vortex is formed at the pointed tooth. The vortex area accounts for about 1 / 4 of the diameter of the pointed-tooth-shaped runner. The cross-sectional dimension of the runner at the pointed tooth first gradually increases and then gradually decreases. The gradually expanding and gradually contracting structure in the runner also increases the dissipation of the water flow energy. Then the water flow flows into the second fan-shaped runner 9. The structural design of the second fan-shaped runner 9 is to change the water flow direction, so that the main flow area of the water flow flowing into the third fan-shaped runner 11 through the second fan-shaped runner 9 is gradually compressed, increasing the collision between water flows, and at the same time generating a vortex area the same as that in the first fan-shaped runner 7. The energy dissipation mechanism of the water flow flowing into the second pointed-tooth-shaped runner 12 and the fourth fan-shaped runner 13 is the same as that of the water flow in the first pointed-tooth-shaped runner 8 and the second fan-shaped runner 9. Then the water flow flows from the fourth fan-shaped runner 13 into the next runner unit and repeats the above process.

[0034] During the whole process, through effects such as short-distance and large-angle deflection of the water flow, impact on the side wall, and fully developed vortex of the water flow, the consumption of the water flow energy is realized. Especially the compression of the water flow and the development of the vortex in the first fan-shaped runner 7 and the fourth fan-shaped runner 13, and the fully developed vortex in the first pointed-tooth-shaped runner 8 and the second pointed-tooth-shaped runner 12. Thereby, the performance of the water emitter is changed or improved, including the hydraulic performance and the anti-clogging performance. This is also the main factor for the excellent energy dissipation effect of this water emitter.

[0035] Such as Figure 1 — Figure 3As shown, more specifically, the preferred specific dimensions of this embodiment are as follows. The overall depth of the water inlet 1, the water outlet 2, and the labyrinth flow channel 3 is 1 mm, and the minimum width of the flow channel is 1.5 mm. The first sector flow channel 7, the second sector flow channel 9, the third sector flow channel 11, and the fourth sector flow channel 13 are quarter circles with a radius of 1.5 mm. The minimum width of the positive "Y"-shaped teeth 6 and the inverted "Y"-shaped teeth 10 is 0.2 mm. The vertical height from the bottom end of the pointed teeth of the positive "Y"-shaped teeth 6 to the top plane side wall 15 is 1.5 mm, and the vertical height from the bottom end of the pointed teeth of the inverted "Y"-shaped teeth 10 to the bottom plane side wall 14 is 1.5 mm. The vertical distance from the tip of the pointed teeth of the positive "Y"-shaped teeth 6 to the top plane side wall 15 is 2.6 mm, and the vertical distance from the tip of the pointed teeth of the inverted "Y"-shaped teeth 10 to the bottom plane side wall 14 is 2.6 mm. The radius of the side walls 16 of the pointed tooth-shaped flow channels on the left and right sides of the positive "Y"-shaped teeth 6 and the inverted "Y"-shaped teeth 10 is 3.1 mm, and the radius of the inner side wall 17 of the sector is 1.5 mm. The total height of the labyrinth flow channel unit is 4.9 mm, and the total length of the flow channel is 300.6 mm.

[0036] The water flows through the water inlet 1 and first enters the positive "Y"-shaped flow channel 4 and the inverted "Y"-shaped flow channel 5. After being fully dissipated of energy through multiple series-connected flow channel units, it flows out from the water outlet 2 for irrigation. The positive "Y"-shaped flow channel 4 is divided into three flow channel parts: the first sector flow channel 7, the first pointed tooth-shaped flow channel 8, and the second sector flow channel 9. The inverted "Y"-shaped flow channel is divided into three flow channel parts: the third sector flow channel 11, the second pointed tooth-shaped flow channel 12, and the fourth sector flow channel 13. When the water flows through the first sector flow channel 7 and the third sector flow channel 11, a fully developed long strip-shaped vortex will be formed at the edge of the flow channel, consuming part of the energy and changing the water flow direction at the same time. When entering the first pointed tooth-shaped flow channel 8 and the second pointed tooth-shaped flow channel 12, due to the setting of the tooth tip structure, the flow channel first gradually expands and then gradually shrinks. While consuming the water flow energy, a vortex with greater intensity and more sufficient development is formed at the pointed teeth, further intensifying the energy dissipation of the water flow. The water flow flowing out from the first pointed tooth-shaped flow channel 8 and the second pointed tooth-shaped flow channel 12 respectively flows into the second sector flow channel 9 and the fourth sector flow channel 13. The functions of the second sector flow channel 9 and the fourth sector flow channel 13 are, firstly, to change the water flow direction, and secondly, to fully compress the main water flow when the water flow flows into the next flow channel part, increasing the collision between the water flows, thereby increasing the energy loss of the water flow. Then the water flow flows from the fourth sector flow channel 13 into the next flow channel unit and repeats the above process.

[0037] As shown in the attached Figure 4 figures, the present invention uses a numerical simulation method consistent with the actual situation to simulate and analyze the fluid velocity distribution in the local flow channel of the water emitter. By observing the attached Figure 4It can be seen that long strip-shaped vortices are formed at the channel side walls of the first fan-shaped channel 7 and the third fan-shaped channel 11, occupying a part of the channel area and compressing the water flow in the main flow area. Stronger vortices are formed at the teeth of the first serrated channel 8 and the second serrated channel 12, also occupying a part of the channel area and compressing the main flow area. In the second fan-shaped channel 9 and the fourth fan-shaped channel 13, due to the obstruction of the channel side walls, the water flow direction changes, thus changing the water flow distribution and energy dissipation in the next channel part. The impact of the water flow on the channel side walls, the development of vortices, and the collision between the turbulent water flows greatly consume the energy of the water flow, which is the key factor for the good performance of this irrigation emitter.

[0038] As shown in the appendix Figure 5 , for the irrigation emitter of the present invention, a flow rate-pressure relationship curve graph is obtained through numerical simulation. In the appendix Figure 5 , the abscissa is the working pressure H (m H 2 O) at the water inlet, and the ordinate is the water outlet flow rate Q (L / h). It can be obtained that the flow state index is 0.596, which meets the hydraulic performance requirements of the irrigation emitter, has good hydraulic performance, and the energy dissipation effect of the channel unit is obvious.

[0039] As shown in the appendix Figure 5 , for the flow rate-pressure relationship curve graph obtained through numerical simulation of the irrigation emitter of this embodiment. Among them, assuming that the pressure head at the water inlet is 5 m H 2 O, the water outlet flow rate is 1.87 L / h; when the pressure head at the water inlet is 10 m H 2 O, the water outlet flow rate is 2.78 L / h. Comparing with the traditional irrigation emitter, under the working pressure of 5 - 10 m H 2 O, the water output is 1.95 - 2.90 L / h. Under the condition that the cross-sectional area of the channel of this embodiment is 50% larger than that of the traditional irrigation emitter, the water output does not increase, and the slope of the flow rate-pressure curve only increases by 1.34% (under the design pressure) compared with the traditional irrigation emitter. If the cross-sectional size of the channel is the same as that of the traditional irrigation emitter, the slope of the flow rate-pressure curve of the present invention can be reduced by 42.7% compared with the traditional irrigation emitter, and the irrigation uniformity is greatly improved. Therefore, the "Y"-shaped drip irrigation emitter provided by the present invention has much stronger hydraulic performance or anti-clogging performance than the traditional irrigation emitter.

[0040] Compared with the existing labyrinth channels, the channel of the "Y"-shaped drip irrigation emitter provided by the present invention has improved water outlet uniformity, good energy dissipation effect, a relatively large increase in the cross-sectional size of the channel, and obvious improvement in anti-clogging performance.

[0041] When applying the present invention, it can be selected according to the specific working environment of the irrigation area:

[0042] When the cross-sectional dimension parameters of the maze flow channel of the "Y"-shaped drip irrigation emitter provided by the present invention are the same as those of the maze flow channel of the existing emitter, its hydraulic performance is significantly improved, the water discharge uniformity is higher, it is applicable to regions with good water quality conditions, can save water resources to a greater extent, reduce production costs, and improve the quality of crops.

[0043] When the cross-sectional dimension of the maze flow channel of the "Y"-shaped drip irrigation emitter provided by the present invention is increased by about 50% compared with the maze flow channel of the existing emitter, its hydraulic performance is approximately the same as that of the existing emitter, and with the increase in the cross-sectional dimension of the flow channel, the anti-clogging performance is significantly improved. It is applicable to regions with poor water quality conditions where the flow channel is prone to clogging, can extend the service life of the emitter, and is conducive to the normal progress of irrigation work.

[0044] When the cross-sectional dimension of the maze flow channel of the "Y"-shaped drip irrigation emitter provided by the present invention is appropriately increased compared with the cross-sectional dimension of the maze flow channel of the existing emitter, its hydraulic performance and anti-clogging performance can be improved to a certain extent at the same time.

[0045] During use, the cross-sectional dimension of the flow channel, the number of flow channel units and the length of the flow channel can be increased or decreased according to specific requirements, which can save water resources to a greater extent, reduce production costs, and improve the quality of crops.

[0046] The above has introduced in detail the "Y"-shaped drip irrigation emitter provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A Y-shaped drip irrigation emitter, comprising a water inlet and a water outlet provided at two ends, with a labyrinth flow channel arranged between the water inlet and the water outlet. The labyrinth flow channel has a bottom planar sidewall and a top planar sidewall. Characterized in that: The labyrinth flow channel includes a plurality of sequentially connected and identical flow channel units connected in series. In any flow channel unit, a forward-fixed "Y"-shaped tooth and a backward-fixed "Y"-shaped tooth are sequentially arranged, forming a positive "Y"-shaped flow channel and an inverted "Y"-shaped flow channel in the flow channel unit; on both sides of the "Y"-shaped tooth, a pointed-tooth-shaped flow channel sidewall and a fan-shaped flow channel sidewall are symmetrically formed. At the front end of the "Y"-shaped tooth, two arc-shaped pointed teeth are symmetrically formed towards both sides. The inner sidewall of the arc-shaped pointed tooth is an arc surface, and a V-shaped groove is formed between the inner sidewalls of the two arc-shaped pointed teeth; among them, the root of the forward-fixed "Y"-shaped tooth is fixedly arranged on the bottom planar sidewall of the labyrinth flow channel, and the root of the backward-fixed "Y"-shaped tooth is fixedly arranged on the top planar sidewall of the labyrinth flow channel. The positive "Y"-shaped flow channel includes a first fan-shaped flow channel, a first pointed-tooth-shaped flow channel, and a second fan-shaped flow channel connected in sequence; the inverted "Y"-shaped flow channel includes a third fan-shaped flow channel, a second pointed-tooth-shaped flow channel, and a fourth fan-shaped flow channel connected in sequence. Water flow forms strip-shaped vortices at the flow channel sidewalls of the first fan-shaped flow channel and the third fan-shaped flow channel, occupying a part of the flow channel area, so that the water flow in the main flow area is compressed; water flow forms vortices with greater intensity at the pointed teeth of the first pointed-tooth-shaped flow channel and the second pointed-tooth-shaped flow channel, and also occupies part of the flow channel area, compressing the main flow area; in the second fan-shaped flow channel and the fourth fan-shaped flow channel, due to the obstruction of the flow channel sidewalls, the water flow direction changes, thereby changing the water flow distribution and energy dissipation in the next flow channel part. The radius of the fan-shaped flow channel sidewall formed on both sides of the "Y"-shaped tooth is 1 - 1.5 mm; the radius of the inner sidewall of the two arc-shaped pointed teeth is 1.2 - 1.7 mm.

2. The Y-shaped drip irrigation emitter according to claim 1, Characterized in that: The radius of the pointed-tooth-shaped flow channel sidewall formed on both sides of the "Y"-shaped tooth is 2.1 - 3.1 mm.

3. The Y-shaped drip irrigation emitter according to claim 1 or 2, Characterized in that: The vertical distance from the tip of the arc-shaped pointed tooth of the forward-fixed "Y"-shaped tooth to the top planar sidewall of the labyrinth flow channel is 1.7 - 2.6 mm.

4. The Y-shaped drip irrigation emitter according to claim 3, Characterized in that: The vertical distance from the tip of the arc-shaped pointed tooth of the backward-fixed "Y"-shaped tooth to the bottom planar sidewall of the labyrinth flow channel is 1.7 - 2.6 mm.

5. The Y-shaped drip irrigation emitter according to claim 4, Characterized in that: The vertical distance from the bottom end of the arc-shaped pointed tooth of the forward-fixed "Y"-shaped tooth to the top planar sidewall is 1 - 1.5 mm.

6. The Y-shaped drip irrigation emitter according to claim 5, Characterized in that: The vertical distance from the bottom end of the arc-shaped pointed tooth of the backward-fixed "Y"-shaped tooth to the bottom planar sidewall is 1 - 1.5 mm.

7. The Y-shaped drip irrigation emitter according to claim 1 or 6, Characterized in that: The depths of the water inlet, water outlet, and maze flow channel are all 1 mm.

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