A drip irrigation device for integrated water and fertilizer management of pasture

Abstract

This utility model discloses an integrated water and fertilizer drip irrigation device for forage grass, including a water and fertilizer mixing tank with a water inlet and a fertilizer inlet at the top and a mixed liquid outlet at the bottom. A screen filter is installed inside the mixed liquid outlet of the recovery tank. A liftable filter tray is horizontally set at the bottom of the water and fertilizer mixing tank, and its edge is slidably connected to the inner wall of the tank via a slide rail. A main pipeline has its input end connected to the mixed liquid outlet via a first water pump, and a three-stage filter is connected in series on the main pipeline. Multiple branch pipelines are vertically connected to the main pipeline via three-way valves. The integrated water and fertilizer drip irrigation device for forage grass provided by this utility model has the following advantages: it completely solves drip irrigation blockage, blocks particulate matter from entering the drip irrigation tape at the source, significantly reduces the risk of pipe and dripper blockage, and ensures long-term stable operation of the irrigation system; it designs a closed-loop recovery link, greatly reducing resource loss caused by direct discharge in traditional systems; and it significantly simplifies maintenance.

Description

Technical Field

[0001] This utility model relates to the field of irrigation and fertilization technology, and in particular to a drip irrigation device for integrated water and fertilizer application for pasture. Background Technology

[0002] Forage is the foundation for livestock production, especially for herbivorous livestock. Forage not only contains all the essential nutrients for livestock but also crude fiber, which is particularly important for maintaining the health of ruminants and cannot be replaced by grains or other feeds. High-quality forage can fully meet the nutritional needs of most livestock, and supplementation with concentrate is generally unnecessary except during the production or fattening period. Many experiments have shown that if the quality of forage is too low, milk production in cattle will decrease regardless of the amount of concentrate supplemented; however, with concentrate making up 20% of the daily ration, replacing low-quality forage such as wheat straw and rice straw with high-quality pre-flowering alfalfa hay can increase daily milk production from 23.5 kg to 36.2 kg. For fattening cattle and sheep, improving hay quality while maintaining the same proportion of concentrate significantly improves weight gain. Forage is the cheapest feed source for livestock. Compared to grain crops, feeding livestock with forage is much less expensive. On the same area of ​​land, under the same production conditions, one mu (approximately 0.16 acres) of Styrax chinensis can produce 1000-2000 kg of hay. Based on its protein content of 15%, it can provide 150-300 kg of pure protein, which is equivalent to 2-3 times that of other crops.

[0003] Traditional drip irrigation systems for pasture have the following drawbacks: 1. Clogging problem: Undissolved fertilizer particles enter the pipes directly, causing blockage of the drip irrigation tape; 2. Fertilizer waste: A large amount of undissolved fertilizer is directly discharged during backwashing; 3. Difficult maintenance: Sedimentation at the bottom of the mixing tank requires manual cleaning after the machine is stopped.

[0004] Although existing technologies employ multi-stage filtration, they cannot achieve dynamic fertilizer recovery and system self-cleaning. Utility Model Content

[0005] This utility model discloses an integrated drip irrigation device for pasture water and fertilizer. It studies and improves the existing structure and its shortcomings, and provides an integrated drip irrigation device for pasture water and fertilizer to achieve better practical value.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A drip irrigation device for integrating water and fertilizer in pasture includes:

[0008] The water-fertilizer mixing tank has a water inlet and a fertilizer inlet at the top, and a mixed liquid outlet at the bottom. A screen filter is installed inside the mixed liquid outlet.

[0009] The liftable filter tray is horizontally set at the bottom of the water-fertilizer mixing tank, and its edge is slidably connected to the inner wall of the water-fertilizer mixing tank via a slide rail.

[0010] The main pipeline has an input end connected to the outlet of the mixture via a first water pump, and a three-stage filter is connected in series on the main pipeline.

[0011] Multiple branch pipes are vertically connected to the main pipe via three-way valves;

[0012] Drip irrigation tape is connected to branch pipes via anti-clogging connectors;

[0013] The fertilizer recovery pipe is connected at the bottom of the side wall of the water-fertilizer mixing tank and located below the filter tray at the top, and extends to the recovery tank at the bottom.

[0014] In some embodiments, the liftable filter tray includes:

[0015] The filter screen has a mesh diameter smaller than the particle size of the undissolved fertilizer particles;

[0016] The lifting rod is vertically fixed to the center of the filter screen and its upper end protrudes through the first sealing cap on the top of the tank;

[0017] The travel limit structure is located inside the slide rail to limit the lifting and lowering travel of the filter tray.

[0018] In some embodiments, the fertilizer recovery pipe is provided with:

[0019] Manual ball valve, located in the middle section of the fertilizer recovery pipe;

[0020] A transparent observation window is located downstream of the manual ball valve. An optical magnifying glass is provided on the outer surface of the transparent observation window, and its inner diameter is larger than the diameter of the fertilizer recovery pipe.

[0021] An inclined guide section extends into the recovery tank at a predetermined angle.

[0022] In some embodiments, the drain pipe of the tertiary filter is connected to a cyclone separator, which includes:

[0023] The conical tank has a tangential inlet at the top connected to a drain pipe.

[0024] A pull-out filter basket is installed at the bottom of the conical tank.

[0025] The overflow pipe is vertically located at the center of the conical tank and extends to the recovery tank.

[0026] In some embodiments, the bottom of the filter basket is provided with a second fine filter screen, and its side wall handle and the guide groove on the side of the conical tank form a sliding pair.

[0027] In some embodiments, the recycling tank is provided with:

[0028] The stirring mechanism includes a stirring blade coaxially connected to an external motor, and the blade edge of the stirring blade is provided with an anti-winding structure.

[0029] A liquid level indicator is installed on the inner wall of the recovery tank.

[0030] The water supply pipe has its inlet below the lowest mark on the liquid level indicator.

[0031] In some embodiments, a slag removal port is provided on the side wall of the water-fertilizer mixing tank, and a second sealing cover is hinged to the outer edge of the slag removal port. The inner edge of the second sealing cover is provided with a magnetic sealing strip that attracts the tank body of the water-fertilizer mixing tank.

[0032] In some embodiments, a backwashing circuit is further included, comprising:

[0033] The backwash branch pipe connects the outlet of the three-stage filter to the outlet of the water-fertilizer mixing tank.

[0034] The recovery branch pipe connects the backwash branch pipe and the tangential inlet of the cyclone separator;

[0035] A three-way flow switching valve is located at the intersection of the sewage pipe and the recovery branch pipe, and is used to switch the flow direction to the cyclone separator tank or external sewage discharge.

[0036] In some embodiments, the distance between the liftable filter tray and the fertilizer recovery pipe inlet is less than the undissolved fertilizer particle size, and when the filter tray is lowered to its lowest point, it completely covers the fertilizer recovery pipe inlet.

[0037] The integrated water and fertilizer drip irrigation device for pasture provided by this utility model has the following advantages:

[0038] 1. Completely solves drip irrigation clogging: A liftable filter tray dynamically intercepts undissolved fertilizer particles, combined with a three-stage filter for fine sieving of impurities, preventing particulate matter from entering the drip irrigation belt at the source. This significantly reduces the risk of pipe and dripper clogging, ensuring long-term stable operation of the irrigation system. 2. Designed closed-loop recycling system: Settled particles at the bottom of the water-fertilizer mixing tank slide into the recycling tank without power via an inclined guide section; solid particles in the backflushing wastewater are separated by centrifugal separation through the tangential inlet, retained and recycled by the filter cake basket, kept suspended by the agitator, and the water supply pipe maintains liquid level balance; the recycled material re-enters the water-fertilizer cycle, significantly reducing resource losses caused by direct discharge in traditional systems. 3. Breakthrough simplified maintenance: The three-stage filter is backflushed via a backflushing branch pipe; a flow switching valve directs the wastewater to a cyclone separator for online regeneration; the filter tray lifting rod can be raised and lowered with a single button; the filter cake basket in the cyclone separator is pulled out along the guide groove for cleaning; and the magnetic second sealing cover at the water-fertilizer mixing tank's cleaning port opens and closes quickly. This completely changes the traditional drip irrigation operation mode of frequent disassembly and cleaning, significantly improving maintenance efficiency. Attached Figure Description

[0039] Figure 1This is a three-dimensional structural diagram of a drip irrigation device for integrated water and fertilizer management of pasture proposed in this utility model;

[0040] Figure 2 This is a schematic diagram of the internal structure of the water and fertilizer mixing tank of a drip irrigation device for integrated water and fertilizer for pasture proposed in this utility model.

[0041] Figure 3 This is a schematic diagram of the internal structure of the cyclone separator tank of the integrated drip irrigation device for forage water and fertilizer proposed in this utility model;

[0042] Figure 4 This is a schematic diagram of the internal structure of the recycling tank of a drip irrigation device for integrated water and fertilizer management of forage grass proposed in this utility model;

[0043] Figure 5 This is a cross-sectional view of the drip irrigation tape of a drip irrigation device for integrated water and fertilizer management of pasture proposed in this utility model;

[0044] Figure 6 for Figure 1 A magnified view of a portion at point A shown;

[0045] Figure 7 for Figure 1 A magnified view of a portion at point B shown.

[0046] In the attached diagram: 1. Water-fertilizer mixing tank; 101. Water inlet; 102. Fertilizer inlet; 103. Mixed liquid outlet; 109. Screen filter; 1091. Cylinder; 1092. Filter cylinder; 1093. Flanged structure; 18. Anti-clogging connector; 2. Main pipeline; 2301. Slide rail; 2302. Filter screen; 2303. Lifting rod; 2304. First sealing cover; 2305. Stroke limit structure; 2305a. Upper sleeve; 2305b. Lower sleeve; 24. Fertilizer recovery pipe; 2401. Manual ball valve; 2402. Transparent observation window; 2403. Inclined guide section; 2404. Optical magnifying glass. 25. Recovery tank; 2501. External motor; 2502. Agitator; 2503. Liquid level indicator; 2504. Water supply pipe; 2505. Slag discharge valve; 26. Cyclone separator; 2601. Conical tank body; 2602. Tangential inlet; 2603. Filter basket; 2604. Overflow pipe; 2605. Second fine filter screen; 2606. Handle; 2607. Guide groove; 27. Slag removal port; 2701. Second sealing cover; 2702. Magnetic sealing strip; 3. First water pump; 4. Branch pipe; 5. Drip irrigation tape; 51. Turbulent flow channel; 501. Drip hole; 7. Three-stage filter; 8. Three-way valve. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0048] Reference Figures 1 to 7 Figure 1 shows a preferred embodiment of a drip irrigation device for fertigation of pasture, comprising:

[0049] The water-fertilizer mixing tank 1 has a water inlet 101 and a fertilizer inlet 102 at the top, and a mixed liquid outlet 103 at the bottom. A screen filter 109 is installed inside the mixed liquid outlet 103. A liftable filter tray mechanism is horizontally set at the bottom of the water-fertilizer mixing tank 1, and its edge is slidably connected to the inner wall of the water-fertilizer mixing tank 1 via a slide rail 2301. The main pipe 2 has its input end connected to the mixed liquid outlet 103 via a first water pump 3, and a three-stage filter 7 is connected in series on the main pipe 2. Multiple branch pipes 4 are vertically connected to the main pipe 2 via three-way valves 8. Drip irrigation tape 5 is connected to the branch pipes 4 via an anti-clogging connector 18. The fertilizer recovery pipe 24 is connected at the bottom of the side wall of the water-fertilizer mixing tank 1 at the top and located below the liftable filter tray mechanism, and extends to the recovery tank 25 at the bottom. Specifically, as shown... Figure 1As shown, the screen filter 109 has a stepped cylindrical structure, comprising an upper large-diameter cylindrical body 1091 and a lower small-diameter filter screen cylinder 1092. The outer diameter of the cylindrical body 1091 matches the inner diameter of the mixed liquid outlet 103. Mesh holes are evenly distributed on the side walls and bottom of the filter screen cylinder 1092. The top of the cylindrical body 1091 has an upward-flared structure 1093, which extends horizontally outward to form a limiting flange. The bottom of the cylindrical body 1091 tapers inward to prevent particle accumulation. Reinforcing ribs are evenly distributed along the axial direction on the outer wall of the filter screen cylinder 1092 to resist deformation caused by water flow impact. The screen filter 109 is embedded inside the mixed liquid outlet 103, located directly below the liftable filter tray mechanism. An annular groove is provided on the inner wall of the mixed liquid outlet 103, into which an O-ring silicone seal is pre-sealed. The filter screen 109 is pressed into the mixture outlet 103 from top to bottom, so that the flanged structure 1093 abuts against the upper edge of the mixture outlet 103. The filter screen cylinder 1092 passes through the O-ring silicone seal until the outer wall of the cylinder 1091 is tightly against the inner wall of the mixture outlet 103. The threaded pressure ring is screwed into the inner thread of the mixture outlet 103, pressing down to tighten the upper flanged structure 1093, forming a two-way lock. An anti-corrosion gasket is installed between the threaded pressure ring and the flanged structure. During maintenance, the filter screen 109 can be removed upwards by unscrewing the pressure ring without disassembling the pipeline. The anti-clogging connector 18 is a T-shaped three-way structure with vertical water inlet and horizontal double outlets. Its upper section has a cylindrical inlet cavity, and the lower section is a symmetrical conical diversion cavity (cone angle 30°). The end is a double threaded interface. The inner wall of the inlet cavity is equipped with a 45° inclined spiral guide plate. A conical filter screen is embedded at the top of the diversion cavity. Impurities settle at the bottom of the cone due to gravity, and clean water is evenly output from both outlets to the drip irrigation belt 5. Furthermore, such as Figure 5 and Figure 6 As shown, the drip irrigation tape 5 is a flat polyethylene tape with an internal turbulent flow channel 51. The cross-section of the turbulent flow channel 51 is a labyrinthine serrated shape. Pressure-compensated drip holes 501 are evenly distributed on the surface of the drip irrigation tape 5. An elastic silicone diaphragm is embedded inside the drip hole 501 to adaptively adjust the flow rate according to the pressure.

[0050] like Figure 2As shown, in some embodiments, the liftable filter tray mechanism includes: a filter screen 2302 with a mesh diameter smaller than the particle size of undissolved fertilizer; a lifting rod 2303, vertically fixed to the center of the filter screen and with its upper end extending through a first sealing cover 2304 on the top of the tank; specifically, the liftable filter tray mechanism can dynamically intercept undissolved fertilizer, and the filtration gap can be adjusted by the lifting rod 2303; a stroke limiting structure 2305, located inside the slide rail 2301, limits the lifting stroke of the liftable filter tray mechanism. Specifically, the slide rail 2301 consists of two sets of symmetrical L-shaped rails, which are vertically welded to the inner wall of the water-fertilizer mixing tank 1. T-shaped guide grooves are provided on the inner side of the rails, and nylon sliders are embedded in the grooves. These rails guide the liftable filter tray mechanism to move vertically up and down along the water-fertilizer mixing tank 1, preventing horizontal deviation. The combination of the T-shaped guide grooves and the nylon sliders reduces frictional resistance. The filter screen 2302 has a double-layer composite structure, comprising a coarse filter screen and a fine filter screen. The filter screen 2302 has a reinforced frame extending from its edge, which is bolted to the nylon slider of the slide rail 2301. The coarse filter screen is used for impact resistance, while the fine filter screen is used for high-precision filtration. The bottom of the lifting rod 2303 is welded to the center of the filter screen 2302. The surface of the rod has graduation lines, and a rotating handle is located at the top. Manually rotating the handle drives the filter screen 2302 to rise and fall, with the graduation lines precisely controlling the height. The first sealing cover 2304 is a flange-type sealing structure. The main body of the first sealing cover 2304 is a threaded annular cover with two embedded lip-shaped sealing rings. These lip-shaped sealing rings are tightly fitted against the outer wall of the lifting rod 2303 to prevent liquid leakage from the water-fertilizer mixing tank 1 along the lifting rod 2303. The travel limit structure 2305 is a stepped limit sleeve, including an upper sleeve 2305a and a lower sleeve 2305b. The upper sleeve 2305a is installed on the top of the water-fertilizer mixing tank 1, and the lower sleeve 2305b is connected to the lifting rod 2303. A limit pin is provided in the overlapping area of ​​the two for mechanical limit to prevent the filter screen 2302 from rising and falling excessively. The limit pin can be removed and replaced to adjust the lifting stroke.

[0051] In some embodiments, the fertilizer recovery pipe 24 is provided with: a manual ball valve 2401 located in the middle section of the fertilizer recovery pipe 24; a transparent observation window 2402 located downstream of the manual ball valve 2401, the outer surface of the transparent observation window 2402 being provided with an optical magnifying glass 2404, the inner diameter of which is larger than the pipe diameter of the fertilizer recovery pipe 24; and an inclined guide section 2403 extending into the recovery tank 25 at a predetermined angle. Specifically, the fertilizer recovery pipe 24 is made of transparent UPVC material, and its main body includes an upper vertical pipe and a lower 30° inclined guide section 2403, which is connected to the manual ball valve 2401 via a flange to control the on / off state. Downstream of the manual ball valve 2401, there is a transparent observation window 2402 with an enlarged inner diameter and an externally embedded 10x magnifying glass 2404. Its upper end is welded to the bottom of the water-fertilizer mixing tank 1 and located directly below the liftable filter tray mechanism, while its lower end extends to the liquid level of the recovery tank 25. When the liftable filter tray mechanism is lowered to the lowest point, it completely covers the pipe opening. Undissolved fertilizer particles at the bottom of the tank slide into the recovery tank without residue under the action of gravity along the superhydrophobic coated pipe wall, achieving zero-power, visualized, and highly efficient recovery (recovery rate > 98%). At the same time, the inclined structure and sedimentation groove design completely solve the problem of pipe deposition and blockage.

[0052] like Figure 3As shown, in some embodiments, the drain pipe of the three-stage filter 7 is connected to a cyclone separator 26, which is used to perform solid-liquid separation on the sludge discharged from the three-stage filter 7 to achieve fertilizer recovery. The cyclone separator 26 includes: a conical tank 2601 with a tangential inlet 2602 at the top connected to the drain pipe; a pull-out filter basket 2603 installed at the bottom of the conical tank 2601; and an overflow pipe 2604, vertically located at the center of the conical tank 2601 and extending to the recovery tank 25. In some embodiments, the bottom of the filter basket 2603 is provided with a second fine filter screen 2605, and its side handle 2606 and the guide groove 2607 on the side of the conical tank 2601 form a sliding pair. Specifically, the three-stage filter 7 adopts a series cylindrical shell, and is equipped with a 20-mesh coarse filter, a 50-mesh medium filter, and a 100-mesh fine filter. It is vertically connected to the main pipe 2 through a quick-release flange. Its inlet receives the mixed liquid output by the first water pump 3, and its outlet flows to the three-way valve 8 of the branch pipe 4. The bottom sewage pipe is connected to the tangential inlet 2602 of the cyclone separator 26 through the three-way flow switching valve 29. The side wall backwash branch pipe 19 is connected to the mixed liquid outlet 103 of the water-fertilizer mixing tank 1, forming a closed-loop system of "filtration-backwash-sewage recycling" to achieve graded interception of impurities and automatic sewage discharge and regeneration. The top of the conical tank 2601 is equipped with a tangential inlet 2602, which is connected to the drain pipe of the three-stage filter 7 at a 45° angle. The bottom is fitted with a filter cake basket 2603 (with a 200-mesh second fine filter screen 2605 at the bottom) through a guide groove 2607. The central overflow pipe 2604 extends vertically to the recovery tank 25. When the sewage containing impurities is injected tangentially into the tank, a vortex is formed, and the solid particles sink to the filter cake basket. The clear liquid flows back to the recovery tank through the overflow pipe, realizing solid-liquid separation and water resource recycling. The time for cleaning the filter cake basket is less than 30 seconds.

[0053] like Figure 4 and Figure 7 As shown, in some embodiments, the recycling tank 25 is equipped with: a stirring mechanism, including a stirring paddle 2502 coaxially connected to an external motor 2501, the blade edge of the stirring paddle 2502 having an anti-winding structure; a liquid level indicator 2503, located on the inner wall of the recycling tank 25; a water supply pipe 2504, the inlet of which is lower than the lowest scale position of the liquid level indicator 2503; a conical structure at the bottom of the tank to collect sediment; and a quick-opening slag discharge valve 2505 at the center, forming a closed recycling hub. In some embodiments, a slag removal port 27 is opened on the side wall of the water-fertilizer mixing tank 1, the outer edge of which is hinged to a second sealing cover 2701, and the inner edge of the second sealing cover 2701 is provided with a magnetic sealing strip 2702 that attracts the tank body of the water-fertilizer mixing tank 1. Specifically, the recycling tank 25 is a vertical cylindrical pressure vessel, located at the lowest point of the system.

[0054] In some embodiments, a backwashing circuit is also included, which is used to guide the wastewater discharge from the three-stage filter 7 to the cyclone separator 26 to form a closed-loop recovery system. Specifically, it includes: a backwash branch pipe 19, connecting the outlet of the three-stage filter 7 to the mixed liquid outlet 103 of the water-fertilizer mixing tank 1; a recovery branch pipe 28, connecting the backwash branch pipe 19 and the tangential inlet 2602 of the cyclone separator 26; and a three-way flow switching valve 29, located at the intersection of the wastewater discharge pipe and the recovery branch pipe 28, for switching the flow direction to the cyclone separator 26 or external wastewater discharge.

[0055] In some embodiments, the distance between the liftable filter tray mechanism and the inlet of the fertilizer recovery pipe 24 is less than the undissolved fertilizer particle size, and when the liftable filter tray mechanism is lowered to its lowest point, it completely blocks the inlet of the fertilizer recovery pipe 24.

[0056] Working principle:

[0057] Preparation before operation: Raise the liftable filter tray mechanism to the highest point and add water and fertilizer; close the ball valve 2401 of the fertilizer recovery pipe 24 and start the stirring mechanism to dissolve the fertilizer.

[0058] Running during operation:

[0059] Irrigation stage: The mixture passes sequentially through screen filter 109, main pipe 2, tertiary filter 7, branch pipe 4, and drip irrigation tape 5;

[0060] Backwash trigger: When the differential pressure of the tertiary filter 7 exceeds the limit, the flow direction switching valve 29 is switched to the recovery branch pipe 28; backwashing is started, and water flows through the backwash branch pipe 19 to backwash the tertiary filter 7, carrying impurities into the cyclone separator 26.

[0061] Fertilizer recovery: A vortex is formed inside the cyclone separator 26, solid particles sink into the filter basket 2603, and the clear liquid flows back to the recovery tank 25 through the overflow pipe 2604.

[0062] Post-work maintenance:

[0063] Settling and recovery: Lower the liftable filter tray mechanism to the lowest point (completely covering the recovery pipe inlet), open the ball valve 2401, and the undissolved particles at the bottom of the tank slide into the recovery tank 25 through the inclined guide section 2403;

[0064] Slag removal operation: Open the slag removal port 27 to clean the residue at the bottom of the tank, and pull out the filter basket 2603 to pour out the solid slag.

[0065] Any content not described in detail in this specification is prior art known to those skilled in the art.

[0066] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A drip irrigation device for integrating water and fertilizer in forage, characterized in that, include: The water-fertilizer mixing tank (1) is provided with a water inlet (101) and a fertilizer inlet (102) at the top and a mixed liquid outlet (103) at the bottom. A screen filter (109) is installed inside the mixed liquid outlet (103). The liftable filter tray mechanism is horizontally set at the bottom of the water-fertilizer mixing tank (1), and its edge is slidably connected to the inner wall of the water-fertilizer mixing tank (1) through the slide rail (2301); The main pipeline (2) is connected to the outlet (103) of the mixture via a first water pump (3) at its input end. A three-stage filter (7) is connected in series on the main pipeline (2). Multiple branch pipes (4) are vertically connected to the main pipe (2) via three-way valves (8); The drip irrigation tape (5) is connected to the branch pipe (4) via the anti-blocking connector (18); The fertilizer recovery pipe (24) is connected at the bottom of the side wall of the water-fertilizer mixing tank (1) and located below the liftable filter tray mechanism at the top end, and extends to the recovery tank (25) at the bottom end.

2. The integrated water and fertilizer drip irrigation device for forage grass according to claim 1, characterized in that, The liftable filter tray mechanism includes: The filter screen (2302) has a mesh diameter smaller than the particle size of the undissolved fertilizer particles; The lifting rod (2303) is vertically fixed to the center of the filter screen and its upper end protrudes through the first sealing cap (2304) on the top of the tank; The travel limit structure (2305) is located inside the slide rail (2301) to limit the lifting travel of the liftable filter tray mechanism.

3. The integrated water and fertilizer drip irrigation device for pasture according to claim 1, characterized in that, The fertilizer recovery pipe (24) is equipped with: Manual ball valve (2401) is located in the middle section of fertilizer recovery pipe (24); A transparent observation window (2402) is located downstream of the manual ball valve (2401). An optical magnifying glass (2404) is provided on the outer surface of the transparent observation window (2402), and its inner diameter is larger than the diameter of the fertilizer recovery pipe (24). An inclined guide section (2403) extends into the interior of the recovery tank (25) at a predetermined angle.

4. The integrated water and fertilizer drip irrigation device for pasture according to claim 1, characterized in that, The drain pipe of the three-stage filter (7) is connected to a cyclone separator (26), which includes: A conical tank (2601) with a tangential inlet (2602) at the top connected to a drain pipe; A pull-out filter basket (2603) is installed at the bottom of the conical tank (2601); An overflow pipe (2604) is vertically located at the center of the conical tank (2601) and extends to the recovery tank (25).

5. The integrated water and fertilizer drip irrigation device for pasture according to claim 4, characterized in that, The bottom of the filter basket (2603) is provided with a second fine filter screen (2605), and its side wall handle (2606) and the guide groove (2607) on the side of the conical tank (2601) form a sliding pair.

6. The integrated water and fertilizer drip irrigation device for pasture according to claim 1, characterized in that, The recycling tank (25) is equipped with: The stirring mechanism includes a stirring paddle (2502) coaxially connected to an external motor (2501), wherein the blade edge of the stirring paddle (2502) is provided with an anti-winding structure; A liquid level indicator (2503) is installed on the inner wall of the recovery tank (25); The water supply pipe (2504) has its inlet below the lowest mark of the liquid level indicator (2503).

7. The integrated water and fertilizer drip irrigation device for pasture according to claim 1, characterized in that, The water-fertilizer mixing tank (1) has a slag removal port (27) on its side wall. The outer edge of the slag removal port (27) is hinged to a second sealing cover (2701). The inner edge of the second sealing cover (2701) is provided with a magnetic sealing strip (2702) that attracts the tank body of the water-fertilizer mixing tank (1).

8. The integrated water and fertilizer drip irrigation device for pasture according to claim 1, characterized in that, It also includes a backwashing circuit, which includes: Backwash branch pipe (19) connects the outlet of the three-stage filter (7) to the mixed liquid outlet (103) of the water-fertilizer mixing tank (1); The recovery branch pipe (28) connects the backflushing branch pipe (19) and the tangential inlet (2602) of the cyclone separator (26); A three-way flow switching valve (29) is located at the intersection of the sewage pipe and the recovery branch pipe (28) and is used to switch the flow direction to the cyclone separator (26) or external sewage discharge.

9. The integrated water and fertilizer drip irrigation device for pasture according to claim 1, characterized in that, The distance between the liftable filter tray mechanism and the inlet of the fertilizer recovery pipe (24) is less than the particle size of the undissolved fertilizer, and when the liftable filter tray mechanism is lowered to the lowest point, it completely covers the inlet of the fertilizer recovery pipe (24).

Images