Insertable variable flow channel self-flushing sprinkler and application method

Abstract

The present invention discloses an insertable variable flow channel self-flushing sprinkler and an application method, including a sprinkler arranged between a first drip irrigation pipe and a second drip irrigation pipe, the sprinkler comprising an upper module box and a lower module box, the upper module box being provided with an upper auxiliary water retaining member which can be moved downward when filled with water, the lower module box being provided with a lower auxiliary water retaining member which can be moved upward when filled with water, a labyrinth flow channel plate being provided between the upper module box and the lower module box, the upper auxiliary water retaining member cooperating with the labyrinth flow channel, the irrigation water inlet and the irrigation water outlet of the labyrinth flow channel plate when the upper auxiliary water retaining member moves downward, and the lower auxiliary water retaining member cooperating with the flushing water inlet and the flushing water outlet of the labyrinth flow channel plate when the lower auxiliary water retaining member moves upward; the present invention realizes the process of irrigating and automatically cleaning the flow channel, the whole sprinkler has a simple structure, is easy to prepare, is low in cost, is convenient for large-scale production, and is more suitable for drip irrigation operations over large areas and long distances.

Description

Technical Field

[0001] The invention relates to the field of infiltration irrigation emitter design, and in particular to an insertable variable flow channel self-flushing emitter and an application method thereof. Background Art

[0002] Irrigation water is becoming increasingly scarce in arid and semi-arid regions. Using surface water sources with high sediment content as a drip irrigation source has become an effective way to alleviate this problem. Emitters are the most critical components of micro-irrigation systems. Their structure, hydraulic performance, and quality directly impact the system's irrigation uniformity and reliability. In recent years, labyrinth channel emitters, with their distinct advantages such as short flow channel length, compact overall structure, and low cost, have captured a large portion of the domestic and international drip irrigation market.

[0003] Currently, most emitters have high requirements for irrigation water quality, requiring filtration before use. With water scarcity becoming increasingly severe, high-sediment content water, recycled water, and brackish water are often used as irrigation sources. These sources contain large amounts of suspended solids, organic matter, and microorganisms. While measures to address emitter clogging are often employed at the initial stage of drip irrigation projects, sedimentation and filtration are used to reduce the sediment content in the water. However, some fine sediment particles still enter the emitter flow path, where they settle and solidify, causing emitter blockage, reducing emitter lifespan and increasing costs. Therefore, there is an urgent need to develop an emitter that can automatically clean the flow path. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide an insertable variable flow channel self-flushing sprinkler and an application method, which can perform the process of irrigating water and automatically cleaning the flow channel.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: an insertable variable flow channel self-flushing water emitter, comprising a water emitter arranged between a first drip irrigation pipe and a second drip irrigation pipe, the water emitter comprising an upper module box and a lower module box, the upper module box being provided with an upper auxiliary water retaining member which can be moved downward when filled with water, the lower module box being provided with a lower auxiliary water retaining member which can be moved upward when filled with water, a labyrinth flow channel plate being provided between the upper module box and the lower module box, the upper auxiliary water retaining member cooperating with the labyrinth flow channel, the water inlet and the water outlet of the labyrinth flow channel plate when moving downward, and the lower auxiliary water retaining member cooperating with the flushing inlet and the flushing outlet of the labyrinth flow channel plate when moving upward.

[0006] Preferably, the upper module box is a rectangular box structure with an open top fixedly connected to the upper cover plate, and the top of the upper auxiliary water retaining member is connected to the bottom of the upper cover plate via an upper elastic member.

[0007] Preferably, the upper auxiliary water-blocking member includes an upper baffle, the top of the upper baffle is connected to the bottom of the upper elastic member, upper sealing rods are provided on both sides of the bottom of the upper baffle, the upper sealing rods cooperate with the water inlet or the water outlet, an upper through hole is provided on the surface of the upper module box for passing the upper sealing rod, a plurality of upper blocks are provided in the central area of ​​the bottom of the upper baffle, the upper blocks cooperate with the labyrinth flow channel, and an upper through groove is provided on the surface of the upper module box for passing the upper blocks.

[0008] Preferably, an upper drainage channel is provided at one end of the upper module box, the lower end of the upper drainage channel is communicated with the flushing water inlet of the labyrinth flow channel plate, and the upper end of the upper drainage channel is communicated with the area above the upper baffle.

[0009] Preferably, the lower module box is a rectangular box structure with an open bottom and fixedly connected to the lower cover plate, and the bottom of the lower auxiliary water retaining member is connected to the top of the lower cover plate via a lower elastic member.

[0010] Preferably, the lower auxiliary water retaining member includes a lower baffle, the bottom of the lower baffle is connected to the top of the lower elastic member, and lower sealing rods are provided on both sides of the top of the lower baffle. The lower sealing rods cooperate with the flushing water inlet or the flushing water outlet, and a lower through hole for passing the lower sealing rod is opened on the surface of the lower module box.

[0011] Preferably, a lower drainage channel is provided at one end of the lower module box, the upper end of the lower drainage channel is communicated with the water inlet of the labyrinth flow channel plate, and the lower end of the lower drainage channel is communicated with the area below the lower baffle.

[0012] Preferably, the labyrinth flow channel is a bidirectional labyrinth flow channel structure, which includes a plurality of bifurcated flow channels connected in series and has a parallelogram shape.

[0013] In addition, the present invention also discloses an application method of the above-mentioned plug-in variable flow channel self-flushing sprinkler, which comprises the following steps:

[0014] S1: Turn on the water pump of the drip irrigation system and the valve of the first drip irrigation pipe, and close the valve of the second drip irrigation pipe. Water flows into the emitter through the irrigation inlet and is divided into two streams. One stream flows into the area below the lower baffle through the lower drainage channel. The pressure below the lower baffle increases, pushing the lower baffle to overcome the tension of the lower elastic member and move upward, causing the lower blocking rod to move upward to block the flushing inlet and flushing outlet. The other stream enters the labyrinth flow channel of the labyrinth flow channel plate. The water flows in the bifurcated flow channel to offset and dissipate energy, and finally flows out of the irrigation outlet to start the drip irrigation process.

[0015] S2: When the labyrinth flow channel of the labyrinth flow channel plate is blocked, the valve of the second drip irrigation pipe is opened and the valve of the first drip irrigation pipe is closed. At this time, the lower baffle moves downward and resets due to the tension of the lower elastic member and its own gravity, releasing the blockage of the lower blocking rod on the flushing water inlet and flushing water outlet; water flows into the emitter through the flushing water inlet and is divided into two streams. One stream flows through the upper drainage channel into the area above the upper baffle, and the pressure above the upper baffle increases, pushing the upper baffle to overcome the tension of the upper elastic member and The valve of the first drip irrigation pipe is reopened, the valve of the second drip irrigation pipe is closed, and the upper baffle is pulled upward by the elastic member to reset, and then step S1 is repeated to carry out the drip irrigation process.

[0016] Beneficial effects of the present invention:

[0017] In the irrigation mode of the present invention, when the lower auxiliary water baffle moves upward, it cooperates with the flushing water inlet and the flushing water outlet of the labyrinth flow channel plate, so that the water flow offsets and dissipates energy in the labyrinth flow channel to perform the drip irrigation process; and in the flushing mode, when the upper auxiliary water baffle moves downward, it cooperates with the labyrinth flow channel, the irrigation water inlet and the irrigation water outlet of the labyrinth flow channel plate to automatically change the two-way labyrinth flow channel into a one-way labyrinth flow channel, so that the water flow in the labyrinth flow channel flushes the impurity particles retained in the flow channel, and the flushing process can be performed, which can flush the blockage inside the blocked part of the flow channel, improve the anti-blocking performance of the emitter, and ensure the stable outflow of the emitter; it realizes the process of irrigation and automatic cleaning of the flow channel, and the entire emitter has a simple structure, is easy to prepare, and has a low cost, is convenient for large-scale production, and is more suitable for drip irrigation operations over large areas and long distances. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of an insertable variable flow channel self-flushing emitter and a drip irrigation pipe installation;

[0019] Figure 2 for Figure 1 3D exploded view of the middle emitter;

[0020] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the upper and lower auxiliary water retaining members;

[0021] Figure 4 for Figure 2 An enlarged structural diagram of the upper and lower module boxes;

[0022] Figure 5 for Figure 4Schematic diagram of the structure from an upward perspective;

[0023] Figure 6 This is a schematic diagram of the structure of the labyrinth flow channel plate cooperating with the lower blocking rod after the lower auxiliary water retaining member moves upward;

[0024] Figure 7 This is a schematic diagram of the structure of the labyrinth flow channel plate cooperating with the upper stopper and the upper blocking rod after the upper auxiliary water retaining member moves downward;

[0025] Figure 8 Schematic diagram comparing the bidirectional maze flow channel structure in the irrigation mode and the unidirectional maze flow channel structure in the flushing mode;

[0026] Figure 9 This is the overall flow velocity distribution diagram of the maze flow channel in the irrigation mode;

[0027] Figure 10 for Figure 9 Local velocity distribution diagram;

[0028] Figure 11 This is the overall flow velocity distribution diagram of the labyrinth flow channel in flushing mode;

[0029] Figure 12 for Figure 11 Local velocity distribution diagram;

[0030] Figure 13 It is the pressure-flow relationship curve of the labyrinth flow channel;

[0031] Figure 14 This is the trajectory diagram of sediment particles in the maze flow channel under the irrigation mode;

[0032] Figure 15 The diagram shows the movement trajectory of sediment particles in the maze flow channel under flushing mode. DETAILED DESCRIPTION

[0033] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1 to 8As shown, an insertable variable flow channel self-flushing water emitter includes a water emitter 3 arranged between a first drip irrigation pipe 1 and a second drip irrigation pipe 2, the water emitter 3 includes an upper module box 3.1 and a lower module box 3.2, the upper module box 3.1 is provided with an upper auxiliary water retaining member 3.3 which can be moved downward when filled with water, the lower module box 3.2 is provided with a lower auxiliary water retaining member 3.4 which can be moved upward when filled with water, a labyrinth flow channel plate 3.5 is provided between the upper module box 3.1 and the lower module box 3.2, the upper auxiliary water retaining member 3.3 cooperates with the labyrinth flow channel 3.5.1, the water inlet 3.5.2 and the water outlet 3.5.3 of the labyrinth flow channel plate 3.5 when moving downward, and the lower auxiliary water retaining member 3.4 cooperates with the flushing inlet 3.5.4 and the flushing outlet 3.5.5 of the labyrinth flow channel plate 3.5 when moving upward. In this embodiment, the upper module box 3.1 and the lower module box 3.2 are close to the upper and lower surfaces of the labyrinth flow channel plate 3.5, so that the water flow can only flow along the labyrinth flow channel 3.5.1 opened in the labyrinth flow channel plate 3.5; in the irrigation mode, the lower auxiliary water retaining member 3.4 moves upward and cooperates with the flushing water inlet 3.5.4 and the flushing water outlet 3.5.5 of the labyrinth flow channel plate 3.5, so that the water flow offsets and dissipates energy in the labyrinth flow channel 3.5.1, and performs the drip irrigation process; and in the flushing mode, the upper auxiliary water retaining member 3.3 moves downward and cooperates with the labyrinth flow channel 3.5.1, the irrigation water inlet 3.5.2 and the irrigation water outlet 3.5.3 of the labyrinth flow channel plate 3.5, automatically changing the two-way labyrinth flow channel into a one-way labyrinth flow channel, so that the water flow flushes the impurity particles retained in the flow channel in the labyrinth flow channel 3.5.1, and performs the flushing process. In addition, the outer extension sections of the flushing water inlet 3.5.4, the flushing water outlet 3.5.5, the irrigation water inlet 3.5.2 and the irrigation water outlet 3.5.3 in this embodiment are all equipped with connectors to facilitate docking and installation with the drip irrigation pipe.

[0035] Preferably, the upper module box 3.1 is a rectangular box structure with an open top and fixedly connected to the upper cover plate 3.1.1. The top of the upper auxiliary water retaining member 3.3 is connected to the bottom of the upper cover plate 3.1.1 via an upper elastic member 3.6. In this embodiment, the upper elastic member 3.6 is made of rubber with good elasticity.

[0036] Preferably, the upper auxiliary water-blocking member 3.3 includes an upper baffle 3.3.1, the top of the upper baffle 3.3.1 is connected to the bottom of the upper elastic member 3.6, and upper blocking rods 3.3.2 are provided on both sides of the bottom of the upper baffle 3.3.1. The upper blocking rods 3.3.2 cooperate with the water inlet 3.5.2 or the water outlet 3.5.3, and an upper through hole 3.1.2 for passing the upper blocking rod 3.3.2 is provided on the surface of the upper module box 3.1, and a plurality of upper blocks 3.3.3 are provided in the central area of ​​the bottom of the upper baffle 3.3.1, and the upper blocks 3.3.3 cooperate with the labyrinth flow channel 3.5.1, and an upper through groove 3.1.3 for passing the upper block 3.3.3 is provided on the surface of the upper module box 3.1. In this embodiment, the upper through hole 3.1.2 opened on the surface of the upper module box 3.1 can limit the movement process of the upper blocking rod 3.3.2, and the upper through groove 3.1.3 can limit the movement process of the upper stopper 3.3.3.

[0037] Preferably, one end of the upper module box 3.1 is provided with an upper drainage channel 3.1.4, the lower end of the upper drainage channel 3.1.4 is connected to the flushing water inlet 3.5.4 of the labyrinth flow channel plate 3.5, and the upper end of the upper drainage channel 3.1.4 is connected to the area above the upper baffle 3.3.1.

[0038] Preferably, the lower module box 3.2 is a rectangular box structure with an open bottom and fixedly connected to the lower cover plate 3.2.1. The bottom of the lower auxiliary water retaining member 3.4 is connected to the top of the lower cover plate 3.2.1 via a lower elastic member 3.7. In this embodiment, the lower elastic member 3.7 is made of rubber with good elasticity.

[0039] Preferably, the lower auxiliary water retaining member 3.4 includes a lower baffle 3.4.1, the bottom of which is connected to the top of the lower elastic member 3.7, and lower blocking rods 3.4.2 are provided on both sides of the top of the lower baffle 3.4.1. The lower blocking rods 3.4.2 cooperate with the flushing water inlet 3.5.4 or the flushing water outlet 3.5.5. The surface of the lower module box 3.2 is provided with a lower through hole 3.2.2 for passing the lower blocking rod 3.4.2. In this embodiment, the lower through hole 3.2.2 provided on the surface of the lower module box 3.2 can limit the movement of the lower blocking rod 3.4.2.

[0040] Preferably, one end of the lower module box 3.2 is provided with a lower drainage channel 3.2.3, the upper end of the lower drainage channel 3.2.3 is connected to the water inlet 3.5.2 of the labyrinth flow channel plate 3.5, and the lower end of the lower drainage channel 3.2.3 is connected to the area below the lower baffle 3.4.1.

[0041] Preferably, the labyrinth flow channel 3.5.1 is a bidirectional labyrinth flow channel structure, which includes a plurality of bifurcated flow channels 3.5.1.1 connected in series, and the shape of the labyrinth flow channel 3.5.1 is a parallelogram. Figure 6 、 8 As shown in Figures 9 and 10, the water flow is divided into two streams through the bifurcated flow channel 3.5.1.1. The water flow in the middle flow channel is the main flow, and the water flow in the bifurcated flow channel 3.5.1.1 is the branch flow. The high-speed jet at the outlet of the bifurcated flow channel 3.5.1.1 impacts the main flow at the intersection, generating vortexes, which counteract the energy dissipation process and are beneficial to the drip irrigation process. In the flushing mode, the labyrinth flow channel 3.5.1 is as shown in Figures 9 and 10. Figure 7 、 8 As shown in Figures 11 and 12, the upper block 3.3.3 moves downward to block part of the labyrinth flow channel 3.5.1, forming a one-way labyrinth flow channel and guiding the water flow to reversely flush the blocked part of the labyrinth flow channel 3.5.1. The sediment is impacted by the high-speed water flow and flows out of the emitter.

[0042] When conducting the hydraulic performance test of the emitter in the laboratory, the flow rate of the labyrinth flow channel 3.5.1 in the two-way and one-way modes under the pressure of 2-20m was obtained, and the fitting curve was obtained, such as Figure 13 As shown, the flow index of the bidirectional labyrinth flow channel is 0.4612, and the flow index of the unidirectional labyrinth flow channel is 0.5277, which has good pressure compensation performance and can adapt to a larger pressure range.

[0043] like Figure 14 and Figure 15 As shown in the figure, the hydraulic performance of muddy water is simulated in Fluent software to obtain the movement path of sediment particles in the flow channel (the inlet pressure is 10m head). Figure 14 The sediment particles in the bidirectional maze flow channel make eddy motion in the arc section, and the water flow velocity here is relatively low, so the sediment particles are easy to deposit and block the flow channel. Figure 11 and 12 , high-speed water flow appears in the arc section, which can reach a flow rate of 3.01m / s, which can effectively flush the sediment and take it out of the emitter. Figure 15 The sediment particles in the one-way labyrinth flow channel make eddy motion in the main channel section, where the sediment tends to accumulate. Figure 9 and 10 The flow velocity of the flow channel is relatively high here, which can reach a flow rate of 2.25-4.5m / s, which can flush the sediment accumulated in the main channel section. Therefore, when the flow channel of the emitter changes, the other flow channel can automatically and effectively flush the blocked part of the previous flow channel, thereby improving the anti-blocking performance of the emitter and ensuring the stable outflow of the emitter.

[0044] In addition, the present invention also discloses an application method of the above-mentioned plug-in variable flow channel self-flushing sprinkler, which comprises the following steps:

[0045] S1: Turn on the water pump and the valve of the first drip irrigation pipe 1 of the drip irrigation system, close the valve of the second drip irrigation pipe 2, and water flows into the emitter through the irrigation water inlet 3.5.2 and is divided into two streams. One stream flows into the area below the lower baffle 3.4.1 through the lower drainage channel 3.2.3. The pressure below the lower baffle 3.4.1 increases, pushing the lower baffle 3.4.1 to overcome the tension of the lower elastic member 3.7 and move upward, causing the lower blocking rod 3.4.2 to move upward to block the flushing water inlet 3.5.4 and the flushing water outlet 3.5.5. The other stream enters the labyrinth flow channel 3.5.1 of the labyrinth flow channel plate 3.5. The water flows in the bifurcated flow channel 3.5.1.1 of the labyrinth flow channel 3.5.1 and finally flows out from the irrigation water outlet 3.5.3 to carry out the drip irrigation process. S1 of this embodiment corresponds to the irrigation mode.

[0046] S2: When the labyrinth flow channel 3.5.1 of the labyrinth flow channel plate 3.5 is blocked, the valve of the second drip irrigation pipe 2 is opened and the valve of the first drip irrigation pipe 1 is closed. At this time, the lower baffle 3.4.1 is pulled downward by the tension of the lower elastic member 3.7 and its own gravity and resets, releasing the blockage of the flushing water inlet 3.5.4 and the flushing water outlet 3.5.5 by the lower blocking rod 3.4.2; the water flows into the emitter through the flushing water inlet 3.5.4 and is divided into two streams. One stream flows through the upper drainage channel 3.1.4 and enters the area above the upper baffle 3.3.1. The pressure above the upper baffle 3.3.1 increases, pushing the upper baffle 3.3.1 to overcome the upper baffle 3.3.1. The elastic member 3.6 moves downward due to the pulling force, causing the upper blocking rod 3.3.2 to move downward and block the water inlet 3.5.2 and the water outlet 3.5.3, causing the upper block 3.3.3 to move downward and block part of the labyrinth flow channel 3.5.1, forming a one-way labyrinth flow channel and guiding the water flow in reverse to flush the blocked part of the labyrinth flow channel 3.5.1. The sediment is impacted by the high-speed water flow and flows out of the emitter. After the flushing process is completed, the valve of the first drip irrigation pipe 1 is reopened, and the valve of the second drip irrigation pipe 2 is closed. The upper baffle 3.3.1 receives the pulling force of the upper elastic member 3.6 and moves upward to reset, and then step S1 is repeated to carry out the drip irrigation process. In this embodiment, step S2 corresponds to the flushing mode. During the process of repeating step S1 to perform the drip irrigation process, the parts of the previously formed one-way maze flow channel that may be blocked can also be flushed. Therefore, when the emitter flow channel changes, the other flow channel can automatically and effectively flush the blocked parts of the previous flow channel, thereby improving the emitter's anti-blocking performance and ensuring stable outflow of the emitter.

[0047] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The embodiments and features in the embodiments of this application may be arbitrarily combined with each other unless they conflict. The scope of protection of the present invention shall be the technical solutions described in the claims, including equivalent alternatives to the technical features of the technical solutions described in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An insertable variable flow channel self-flushing emitter, comprising an emitter (3) disposed between a first drip irrigation pipe (1) and a second drip irrigation pipe (2), characterized in that: The water injector (3) comprises an upper module box (3.1) and a lower module box (3.2); an upper auxiliary water retaining member (3.3) is provided in the upper module box (3.1) and can be moved downward when filled with water; a lower auxiliary water retaining member (3.4) is provided in the lower module box (3.2) and can be moved upward when filled with water; a labyrinth flow channel plate (3.5) is provided between the upper module box (3.1) and the lower module box (3.2); the upper auxiliary water retaining member (3.3) moves downward when the upper module box (3.1) is provided with a lower auxiliary water retaining member (3.4) which can be moved upward when the lower module box (3.2) is filled with water; When the lower auxiliary water retaining member (3.4) moves upward, it cooperates with the labyrinth flow channel (3.5.1), the water inlet (3.5.2) and the water outlet (3.5.3) of the labyrinth flow channel plate (3.5); when the lower auxiliary water retaining member (3.4) moves upward, it cooperates with the flushing water inlet (3.5.4) and the flushing outlet (3.5.5) of the labyrinth flow channel plate (3.5); the labyrinth flow channel (3.5.1) is a bidirectional labyrinth flow channel structure, which includes a plurality of bifurcated flow channels ( 3.5.1.1), which is in the shape of a parallelogram; the upper auxiliary water retaining member (3.3) includes an upper baffle (3.3.1), and a plurality of upper blocks (3.3.3) are provided in the central area of ​​the bottom of the upper baffle (3.3.1), and the upper blocks (3.3.3) cooperate with the labyrinth flow channel (3.5.1) to change the bidirectional labyrinth flow channel into a unidirectional labyrinth flow channel.

2. The plug-in variable flow channel self-flushing emitter according to claim 1, characterized in that: The upper module box (3.1) is a rectangular box structure with an open top that is fixedly connected to the upper cover plate (3.1.1). The top of the upper auxiliary water retaining member (3.3) and the bottom of the upper cover plate (3.1.1) are connected via an upper elastic member (3.6).

3. The plug-in variable flow channel self-flushing emitter according to claim 2, characterized in that: The top of the upper baffle (3.3.1) is connected to the bottom of the upper elastic member (3.6), and upper blocking rods (3.3.2) are provided on both sides of the bottom of the upper baffle (3.3.1). The upper blocking rods (3.3.2) cooperate with the water inlet (3.5.2) or the water outlet (3.5.3). The surface of the upper module box (3.1) is provided with an upper through hole (3.1.2) for passing the upper blocking rod (3.3.2), and the surface of the upper module box (3.1) is provided with an upper through groove (3.1.3) for passing the upper stopper (3.3.3).

4. The plug-in variable flow channel self-flushing emitter according to claim 3, characterized in that: An upper drainage channel (3.1.4) is provided at one end of the upper module box (3.1), the lower end of the upper drainage channel (3.1.4) is connected to the flushing water inlet (3.5.4) of the labyrinth flow channel plate (3.5), and the upper end of the upper drainage channel (3.1.4) is connected to the area above the upper baffle (3.3.1).

5. The plug-in variable flow channel self-flushing emitter according to claim 1, characterized in that: The lower module box (3.2) is a rectangular box structure with an open bottom and fixedly connected to the lower cover plate (3.2.1). The bottom of the lower auxiliary water retaining member (3.4) and the top of the lower cover plate (3.2.1) are connected via a lower elastic member (3.7).

6. The plug-in variable flow channel self-flushing emitter according to claim 5, characterized in that: The lower auxiliary water retaining member (3.4) comprises a lower baffle (3.4.1), the bottom of the lower baffle (3.4.1) is connected to the top of the lower elastic member (3.7), lower blocking rods (3.4.2) are provided on both sides of the top of the lower baffle (3.4.1), the lower blocking rods (3.4.2) cooperate with the flushing water inlet (3.5.4) or the flushing water outlet (3.5.5), and a lower through hole (3.2.2) for passing the lower blocking rod (3.4.2) is provided on the surface of the lower module box (3.2).

7. The plug-in variable flow channel self-flushing emitter according to claim 6, characterized in that: A lower drainage channel (3.2.3) is provided at one end of the lower module box (3.2), the upper end of the lower drainage channel (3.2.3) is connected to the water inlet (3.5.2) of the labyrinth flow channel plate (3.5), and the lower end of the lower drainage channel (3.2.3) is connected to the area below the lower baffle (3.4.1).

8. A method for using the plug-in variable flow path self-flushing emitter according to any one of claims 1 to 7, characterized in that: It includes the following steps: S1: Open the water pump of the drip irrigation system and the valve of the first drip irrigation pipe (1), close the valve of the second drip irrigation pipe (2), and the water flows into the emitter through the water inlet (3.5.2) and is divided into two streams. One stream flows through the lower drainage channel (3.2.3) and flows into the area below the lower baffle (3.4.1). The pressure below the lower baffle (3.4.1) increases, pushing the lower baffle (3.4.1) to overcome the lower elastic member (3.7). The water flows upward due to the pulling force, so that the lower blocking rod (3.4.2) moves upward to block the flushing water inlet (3.5.4) and the flushing water outlet (3.5.5). Another stream of water flows into the labyrinth flow channel (3.5.1) of the labyrinth flow channel plate (3.5). The water flows in the bifurcated flow channel (3.5.1.1) of the labyrinth flow channel (3.5.1) to offset and dissipate energy, and finally flows out from the irrigation outlet (3.5.3) to carry out the drip irrigation process. S2: When the labyrinth flow channel (3.5.1) of the labyrinth flow channel plate (3.5) is blocked, the valve of the second drip irrigation pipe (2) is opened and the valve of the first drip irrigation pipe (1) is closed. At this time, the lower baffle (3.4.1) is pulled downward by the tension of the lower elastic member (3.7) and its own gravity and resets, releasing the blockage of the flushing water inlet (3.5.4) and the flushing water outlet (3.5.5) by the lower blocking rod (3.4.2); the water flows into the emitter through the flushing water inlet (3.5.4) and is divided into two streams. One stream flows through the upper drainage channel (3.1.4) and enters the area above the upper baffle (3.3.1). The pressure above the upper baffle (3.3.1) increases, pushing the upper baffle (3.3.1) Overcoming the pulling force of the upper elastic member (3.6) and moving downward, the upper blocking rod (3.3.2) moves downward to block the water inlet (3.5.2) and the water outlet (3.5.3), so that the upper block (3.3.3) moves downward to block part of the labyrinth flow channel (3.5.1), forming a one-way labyrinth flow channel, and guiding the water flow to reversely flush the blocked part of the labyrinth flow channel (3.5.1). The sediment is impacted by the high-speed water flow and flows out of the emitter. After the flushing process is completed, the valve of the first drip irrigation pipe (1) is reopened, and the valve of the second drip irrigation pipe (2) is closed. The upper baffle (3.3.1) receives the pulling force of the upper elastic member (3.6) and moves upward to reset, and then repeats step S1 to perform the drip irrigation process.

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