An externally mounted pressurized variable flow channel self-flushing sprinkler and its application method

Abstract

The present invention discloses an externally embedded pressurized variable flow channel self-flushing sprinkler and an application method, including a sprinkler, wherein the sprinkler includes a module box, an upper cover is provided on the top of the module box, an auxiliary water retaining member that can be moved downward under pressure is provided in the module box, a pressurizing device that cooperates with the auxiliary water retaining member is provided on the upper side of the upper cover, a labyrinth flow channel plate is provided at the bottom of the module box, and the auxiliary water retaining member cooperates with the labyrinth flow channel of the labyrinth flow channel plate when moving downward, a lower cover is provided at the bottom of the labyrinth flow channel plate, a water inlet is provided at one end of the labyrinth flow channel plate, and a water outlet is provided at the other end; the sprinkler of the present invention can perform the processes of drip irrigation and flow channel flushing, and in addition, the entire sprinkler has a simple structure, is easy to prepare, and 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 present invention relates to the field of infiltration irrigation emitter design, and in particular to an externally embedded pressurized 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 externally mounted pressurized variable flow channel self-flushing emitter and an application method thereof, which can perform the processes of drip irrigation and flow channel flushing.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: an externally embedded pressurized variable flow channel self-flushing water emitter, including a water emitter, the water emitter includes a module box, an upper cover is provided on the top of the module box, an auxiliary water retaining member that can be moved downward under pressure is provided in the module box, a pressurizing device that cooperates with the auxiliary water retaining member is provided on the upper side of the upper cover, a labyrinth flow channel plate is provided at the bottom of the module box, and the auxiliary water retaining member cooperates with the labyrinth flow channel of the labyrinth flow channel plate when moving downward, a lower cover is provided at the bottom of the labyrinth flow channel plate, a water inlet is provided at one end of the labyrinth flow channel plate, and a water outlet is provided at the other end.

[0006] Preferably, the module box is a rectangular box structure with an open top fixedly connected to the upper cover plate, a bottom of the module box fixedly connected to the upper surface of the labyrinth flow channel plate, and a lower surface of the labyrinth flow channel plate fixedly connected to the upper surface of the lower cover plate.

[0007] Preferably, the auxiliary water retaining member includes a baffle, the top of the baffle is connected to the bottom of the upper cover plate through an elastic member, and a plurality of blocks are provided at the bottom of the baffle, and the blocks cooperate with the labyrinth flow channel.

[0008] Preferably, a through groove for passing a stopper is provided on the surface of the module box.

[0009] Preferably, a trash rack is provided at a position of the lower cover plate corresponding to the water inlet.

[0010] Preferably, the pressurizing device includes a pressurizing column, the bottom of the pressurizing column is threadedly engaged with the top of the pressurizing cylinder, the bottom of the pressurizing cylinder is closed and connected to the top of the pressurizing pipe, and the bottom of the pressurizing pipe passes through the upper cover plate and reaches above the auxiliary water blocking member.

[0011] Preferably, the pressurizing column is made of rubber, and an external thread is provided at the bottom thereof, and an internal thread is provided on the inner side of the top of the pressurizing cylinder, and the external thread cooperates with the internal thread.

[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 externally mounted pressurized variable flow channel self-flushing sprinkler, comprising the following steps:

[0014] S1: Water flows through the water inlet into the labyrinth flow plate in the emitter. When passing through the labyrinth flow channel of the labyrinth flow channel plate, the water flow offsets and dissipates energy in the bifurcated flow channels of the labyrinth flow channel, and finally flows out from the water outlet for drip irrigation.

[0015] S2: When the labyrinth flow channel of the labyrinth flow channel plate is blocked, the pressurizing cylinder is rotated and screwed into the pressurizing cylinder, thereby increasing the pressure in the pressurizing cylinder and pressurizing the area above the auxiliary water retaining member through the pressurizing pipe. When the pressure on the auxiliary water retaining member is greater than the pulling force of the elastic member on it, the auxiliary water retaining member moves downward, thereby causing the block to move downward and block part of the flow channel of the labyrinth flow channel, forming a one-way labyrinth flow channel, increasing the flow velocity in the labyrinth flow channel, and guiding the water flow to flush the blocked part of the labyrinth flow channel. The sediment is impacted by the high-speed water flow and flows out of the sprinkler, and the flushing process is carried out;

[0016] S3: After the flushing process is completed, the pressure column is rotated in the reverse direction, the pressure in the area above the auxiliary water retaining part is reduced, the auxiliary water retaining part moves upward and returns to its position, causing the block to move upward, thereby releasing the blockage of part of the labyrinth flow channel, thereby restoring the bidirectional labyrinth flow channel structure and continuing the drip irrigation process.

[0017] Beneficial effects of the present invention:

[0018] In the irrigation mode of the present invention, water flows through the water inlet into the labyrinth flow channel plate in the sprinkler. When passing through the labyrinth flow channel of the labyrinth flow channel plate, the water flows in the bifurcated flow channel of the labyrinth flow channel to offset and dissipate energy, and finally flows out from the water outlet to perform a drip irrigation process. In the flushing mode, the pressurizing column is rotated and the pressurizing column is screwed into the pressurizing cylinder, thereby increasing the pressure in the pressurizing cylinder, and pressurizing the area above the auxiliary water retaining member through the pressurizing pipe. When the pressure on the auxiliary water retaining member is greater than the pulling force of the elastic member on it, the auxiliary water retaining member moves downward, thereby The block moves downward to block part of the labyrinth flow channel, forming a one-way labyrinth flow channel, thereby increasing the flow velocity in the labyrinth flow channel and guiding the water flow to flush the blocked part of the labyrinth flow channel. The sediment is impacted by the high-speed water flow and flows out of the emitter to perform the flushing process, thereby improving the anti-blocking performance of the emitter and ensuring stable outflow of the emitter. The emitter of the present invention can perform the processes of drip irrigation and flushing the flow channel. In addition, the entire emitter 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of an externally mounted pressurized variable flow channel self-flushing sprinkler;

[0020] Figure 2 for Figure 1 3D exploded view of

[0021] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the auxiliary water retaining member;

[0022] Figure 4 for Figure 2 A schematic diagram of the enlarged structure of the middle module box;

[0023] Figure 5 for Figure 4 Schematic diagram of the structure from an upward perspective;

[0024] Figure 6 for Figure 2 A schematic diagram of the enlarged structure of the middle labyrinth flow channel plate;

[0025] Figure 7 This is a schematic diagram of the structure of the labyrinth flow channel plate and the stopper after the auxiliary water retaining member moves downward;

[0026] Figure 8 Schematic diagram comparing the bidirectional labyrinth flow channel structure in the drip irrigation mode and the unidirectional labyrinth flow channel structure formed by the downward movement of the auxiliary water retaining member in the flushing mode;

[0027] Figure 9 It is the pressure-flow relationship curve of the labyrinth flow channel;

[0028] Figure 10 This is the trajectory diagram of sediment particles in the bidirectional maze flow channel;

[0029] Figure 11 This is the overall flow velocity distribution diagram of the maze flow channel under the irrigation mode;

[0030] Figure 12 for Figure 11 Local velocity distribution diagram;

[0031] Figure 13 This is the overall flow velocity distribution diagram of the labyrinth flow channel in flushing mode;

[0032] Figure 14 for Figure 13 Local flow velocity distribution diagram. 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 8 As shown, an externally embedded pressurized variable flow channel self-flushing water emitter includes a water emitter 3, which includes a module box 3.1. The top of the module box 3.1 is provided with an upper cover plate 3.2. The module box 3.1 is provided with a pressurized auxiliary water retaining member 3.3 that can move downward, and the upper side of the upper cover plate 3.2 is provided with a pressurizing device 3.4 that cooperates with the auxiliary water retaining member 3.3. A labyrinth flow channel plate 3.5 is provided at the bottom of the module box 3.1. When the auxiliary water retaining member 3.3 moves downward, it cooperates with the labyrinth flow channel 3.5.1 of the labyrinth flow channel plate 3.5. A lower cover plate 3.6 is provided at the bottom of the labyrinth flow channel plate 3.5. A water inlet 1 is provided at one end of the labyrinth flow channel plate 3.5, and a water outlet 2 is provided at the other end.

[0035] Preferably, the module box 3.1 is a rectangular box structure with an open top fixedly connected to the upper cover plate 3.2, a bottom of the module box 3.1 fixedly connected to the upper surface of the labyrinth flow channel plate 3.5, and a lower surface of the labyrinth flow channel plate 3.5 fixedly connected to the upper surface of the lower cover plate 3.6. In this embodiment, the fixed connection can be achieved by bonding.

[0036] Preferably, the auxiliary water retaining member 3.3 includes a baffle 3.3.1, the top of which is connected to the bottom of the upper cover 3.2 via an elastic member 3.3.2, and a plurality of blocks 3.3.3 are provided at the bottom of the baffle 3.3.1, which cooperate with the labyrinth flow channel 3.5.1. In this embodiment, the elastic member 3.3.2 is made of rubber with good elasticity.

[0037] Preferably, the surface of the module box 3.1 is provided with a through slot 3.1.1 for passing the stopper 3.3.3. The through slot 3.1.1 can limit the movement of the stopper 3.3.3.

[0038] Preferably, a trash grid 4 is provided on the lower cover plate 3.6 at a position corresponding to the water inlet 1. The trash grid 4 can prevent foreign particles in the water flow from entering the emitter 3.

[0039] Preferably, the pressurizing device 3.4 includes a pressurizing column 3.4.1, the bottom of which is threadedly engaged with the top of a pressurizing cylinder 3.4.2. The bottom of the pressurizing cylinder 3.4.2 is sealed and connected to the top of a pressurizing pipe 3.4.3. The bottom of the pressurizing pipe 3.4.3 passes through the upper cover 3.2 and reaches above the auxiliary water retaining member 3.3. In this embodiment, by twisting the pressurizing column 3.4.1, the pressurizing column 3.4.1 can be screwed downward or upward within the pressurizing cylinder 3.4.2. When screwing downward, the pressurization process is activated, and when screwing upward, the pressurization process is released.

[0040] Preferably, the pressurizing column 3.4.1 is made of rubber, with external threads on its bottom and internal threads on the top inner side of the pressurizing cylinder 3.4.2, with the external threads mating with the internal threads. The selection of rubber for the pressurizing column 3.4.1 enhances the sealing of the threaded connection between the pressurizing column 3.4.1 and the pressurizing cylinder 3.4.2, preventing air leakage.

[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 11 and 12, 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 vortices, which perform a counter-energy dissipation process and are beneficial to the drip irrigation process. The hydraulic performance test of the emitter was carried out in the laboratory, and the flow rate of the bidirectional maze flow channel under a pressure of 2-20m was obtained, and a fitting curve was obtained, as shown in FIG. Figure 9 As shown in the figure, the flow index of the bidirectional labyrinth flow channel is 0.4612, which has good pressure compensation performance and can adapt to a larger pressure range.

[0042] In flushing mode, the labyrinth flow channel 3.5.1 is as follows Figure 7 、 8 As shown in Figures 13 and 14, 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. The double flow channels are changed into a single flow channel, and its flow rate is inevitably increased. The water flow is guided to flush the blocked part of the labyrinth flow channel 3.5.1, and the sediment is impacted by the high-speed water flow and flows out of the emitter.

[0043] like Figure 10As 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 10 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 13 and 14 It can be seen that the auxiliary water retaining piece transforms the bidirectional labyrinth flow channel into a unidirectional labyrinth flow channel. There is a distance between the auxiliary water retaining piece and the arc section of the flow channel, and it will not contact and squeeze the sediment in the arc section. At the same time, the high-speed water flow of the flow channel appears in the arc section, reaching a flow rate of 4.01m / s, which can effectively flush the sediment. Although sediment will accumulate at the corners, these sediments accumulate in the main flow channel. When the auxiliary water retaining piece is reset, combined with Figure 11 and 12 The flow velocity distribution diagram of the flow channel shows that the water flow velocity is relatively large here, reaching a flow rate of 2.25-4.5m / s, which can flush this part of the sediment out of the emitter flow channel, improve the emitter's anti-clogging performance, and ensure the stable outflow of the emitter.

[0044] In addition, the present invention also discloses an application method of the above-mentioned externally mounted pressurized variable flow channel self-flushing sprinkler, comprising the following steps:

[0045] S1: Water flows through the water inlet 1 and enters the labyrinth flow plate 3.5 in the emitter 3. When passing through the labyrinth flow channel 3.5.1 of the labyrinth flow channel plate 3.5, the water dissipates energy in the bifurcated flow channel 3.5.1.1 of the labyrinth flow channel 3.5.1, and finally flows out from the water outlet 2 for drip irrigation.

[0046] S2: When the labyrinth flow channel 3.5.1 of the labyrinth flow channel plate 3.5 is blocked, the pressurizing column 3.4.1 is rotated, and the pressurizing column 3.4.1 is screwed into the pressurizing cylinder 3.4.2, thereby increasing the pressure in the pressurizing cylinder 3.4.2, and pressurizing the area above the auxiliary water retaining member 3.3 through the pressurizing pipe 3.4.3. When the pressure on the auxiliary water retaining member 3.3 is greater than the pulling force of the elastic member 3.3.2, the auxiliary water retaining member 3.3 moves downward, thereby causing the block 3.3.3 to move downward and block part of the flow channel of the labyrinth flow channel 3.5.1, forming a one-way labyrinth. The labyrinth flow channel increases the flow velocity in the labyrinth flow channel 3.5.1 and guides the water flow 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 to carry out the flushing process. In this step, the bidirectional labyrinth flow channel structure is transformed into a unidirectional labyrinth flow channel structure. Although the flow rate of the unidirectional labyrinth flow channel is smaller than that of the bidirectional labyrinth flow channel, the unidirectional labyrinth flow channel structure has only one channel and the flow channel cross-section is reduced. Therefore, the flow velocity in the labyrinth flow channel 3.5.1 is finally increased. The high-speed water flow flushes the blocked area and carries the sediment particles out of the flow channel to achieve a cleaning effect.

[0047] S3: After the flushing process is completed, the pressure column 3.4.1 is rotated in the reverse direction, the pressure in the area above the auxiliary water retaining member 3.3 is reduced, and the auxiliary water retaining member 3.3 moves upward and returns to its original position, causing the blocker 3.3.3 to move upward, releasing the blockage of part of the labyrinth flow channel 3.5.1, thereby restoring the bidirectional labyrinth flow channel structure and continuing the drip irrigation process.

[0048] 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 externally mounted pressurized variable flow channel self-flushing sprinkler, comprising a sprinkler (3), characterized in that: The water injector (3) comprises a module box (3.1), an upper cover (3.2) is provided on the top of the module box (3.1), an auxiliary water retaining member (3.3) that is pressurized and can move downward is provided in the module box (3.1), a pressurizing device (3.4) that cooperates with the auxiliary water retaining member (3.3) is provided on the upper side of the upper cover (3.2), a labyrinth flow channel plate (3.5) is provided at the bottom of the module box (3.1), the auxiliary water retaining member (3.3) cooperates with the labyrinth flow channel (3.5.1) of the labyrinth flow channel plate (3.5) when moving downward, a lower cover (3.6) is provided at the bottom of the labyrinth flow channel plate (3.5), a water inlet (1) is provided at one end of the labyrinth flow channel plate (3.5), and a water outlet (2) is provided at the other end; The module box (3.1) is a rectangular box structure, the top of which is open and fixedly connected to the upper cover plate (3.2), the bottom of the module box (3.1) is fixedly connected to the upper surface of the labyrinth flow channel plate (3.5), and the lower surface of the labyrinth flow channel plate (3.5) is fixedly connected to the upper surface of the lower cover plate (3.6); The auxiliary water retaining member (3.3) comprises a baffle (3.3.1), the top of the baffle (3.3.1) is connected to the bottom of the upper cover (3.2) via an elastic member (3.3.2), a plurality of stoppers (3.3.3) are provided at the bottom of the baffle (3.3.1), and the stoppers (3.3.3) cooperate with the labyrinth flow channel (3.5.1); The pressurizing device (3.4) includes a pressurizing column (3.4.1), the bottom of the pressurizing column (3.4.1) is threadedly engaged with the top of the pressurizing cylinder (3.4.2), the bottom of the pressurizing cylinder (3.4.2) is sealed and communicates with the top of the pressurizing pipe (3.4.3), and the bottom of the pressurizing pipe (3.4.3) passes through the upper cover plate (3.2) and reaches above the auxiliary water retaining member (3.3); A through slot (3.1.1) for inserting a stopper (3.3.3) is provided on the surface of the module box (3.1); The labyrinth flow channel (3.5.1) is a bidirectional labyrinth flow channel structure, which includes a plurality of bifurcated flow channels connected in series ( 3.5.1.1), its shape is a parallelogram.

2. The externally mounted pressurized variable flow channel self-flushing sprinkler according to claim 1, characterized in that: A trash rack (4) is provided on the lower cover plate (3.6) at a position corresponding to the water inlet (1).

3. The externally mounted pressurized variable flow channel self-flushing sprinkler according to claim 1, characterized in that: The pressurizing column (3.4.1) is made of rubber and has an external thread at its bottom. An internal thread is provided on the inner side of the top of the pressurizing cylinder (3.4.2), and the external thread cooperates with the internal thread.

4. A method for using the externally mounted pressurized variable flow channel self-flushing emitter according to any one of claims 1 to 3, characterized in that: It includes the following steps: S1: Water flows through the water inlet (1) into the labyrinth flow plate (3.5) in the emitter (3). When passing through the labyrinth flow channel (3.5.1) of the labyrinth flow channel plate (3.5), the water flow is counteracted and dissipated in the bifurcated flow channel (3.5.1.1) of the labyrinth flow channel (3.5.1), and finally flows out from the water outlet (2) to perform the drip irrigation process. S2: When the labyrinth flow channel (3.5.1) of the labyrinth flow channel plate (3.5) is blocked, the pressurizing column (3.4.1) is rotated, and the pressurizing column (3.4.1) is rotated into the pressurizing cylinder (3.4.2), thereby increasing the pressure in the pressurizing cylinder (3.4.2) and pressurizing the area above the auxiliary water retaining member (3.3) through the pressurizing pipe (3.4.3). When the pressure on the auxiliary water retaining member (3.3) is When the force is greater than the pulling force of the elastic member (3.3.2), the auxiliary water retaining member (3.3) moves downward, thereby causing the stopper (3.3.3) to move downward and block part of the flow channel of the labyrinth flow channel (3.5.1), forming a one-way labyrinth flow channel, thereby increasing the flow velocity in the labyrinth flow channel (3.5.1) and guiding the water flow 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 sprinkler, thus performing the flushing process; S3: After the flushing process is completed, the pressure column (3.4.1) is rotated in the reverse direction, the pressure in the area above the auxiliary water retaining member (3.3) is reduced, and the auxiliary water retaining member (3.3) moves upward and returns to its original position, causing the blocker (3.3.3) to move upward, thereby releasing the blockage of part of the labyrinth flow channel (3.5.1), thereby restoring the bidirectional labyrinth flow channel structure and continuing the drip irrigation process.

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