Self-cleaning screen filter for micro-irrigation

Abstract

The invention relates to the field of agricultural irrigation, and discloses a self-cleaning net type filter for micro-irrigation, the self-cleaning net type filter comprises a shell and a valve plate, an energy storage mechanism is arranged in the shell, the energy storage mechanism comprises a piston and a pressure adjusting plate, an annular groove is formed in the periphery of the piston, a sealing ring is mounted in the annular groove in a sleeving manner, and the pressure adjusting plate is arranged in the sealing ring. The periphery of the piston is connected with a piston sliding block, and a through hole is formed in a plate body of the pressure adjusting plate. The multi-layer composite filter screen is adopted, impurities of different particle sizes are effectively intercepted, and the blocking risk of a spray head and a water dropper is reduced; the energy storage mechanism drives the backwashing cleaning mode to remove impurities attached to the filter screen, the backwashing effect is remarkable, and the service life of the filter is prolonged; the energy storage mechanism, the reset mechanism and the trigger system automatically control the backwashing process according to the pressure generated by blockage, manual intervention is not needed, the labor intensity and the management cost are reduced, the structural design is compact, the occupied space is small, and installation and arrangement in a micro-irrigation system are facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural irrigation, and in particular relates to a self-cleaning mesh filter for micro-irrigation. Background Art

[0002] In micro-irrigation systems, water usually contains various impurities, such as silt, algae, organic debris, etc. If these impurities are not effectively filtered, it is very easy to cause the nozzles and drippers in the micro-irrigation system to be blocked, affecting the uniformity of irrigation and the normal operation of the system, thereby reducing the yield and quality of crops.

[0003] Some existing filters either have insufficient filtering accuracy and cannot effectively remove tiny particle impurities; or the filter needs to be cleaned manually on a regular basis, which is labor-intensive and cannot remove stains by itself. Untimely cleaning will cause the filter to become seriously clogged, affecting the filtering effect and shortening the service life of the filter.

[0004] Therefore, the inventor has introduced a self-cleaning mesh filter for micro irrigation to solve the above-mentioned problems and defects. Summary of the invention

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: A self-cleaning mesh filter for micro-irrigation comprises an outer shell and a valve plate. An energy storage mechanism is arranged inside the outer shell. The energy storage mechanism comprises a piston and a pressure regulating plate. An annular groove is arranged on the periphery of the piston. A sealing ring is sleeved and installed inside the annular groove. A piston slider is connected to the periphery of the piston. A through hole is arranged on the plate body of the pressure regulating plate. An energy storage spring is installed between the pressure regulating plate and the piston. A push rod is connected to one side of the pressure regulating plate. The push rod passes through one end of the outer shell and is movably sleeved therewith. A pressure plate is connected to the other end of the push rod.

[0006] As a preferred embodiment of the present invention, a support frame is connected to the outer side of one end of the shell, a threaded rod is movably connected to the center position of the support frame, an adjusting nut is threadedly sleeved on the rod body of the threaded rod, and the diameter of the threaded rod corresponds to the inner diameter of the sleeve connected between the pressure plates and is movably sleeved therewith.

[0007] As a preferred embodiment of the present invention, an air inlet and outlet are provided at the center of one end of the shell, an anti-fouling cover is arranged on the periphery of the air inlet and outlet, the anti-fouling cover is connected to the shell, a plurality of air holes are provided at the connection between the anti-fouling cover and the shell, and an input pipe is installed at the center of the other end of the shell.

[0008] As a preferred embodiment of the present invention, a filtering mechanism is arranged inside the shell, and the filtering mechanism includes a composite filter screen, a filter screen slider is connected to the periphery of the composite filter screen, a reset rod is connected to the lower end of one side of the composite filter screen, the filter screen slider corresponds to the slide groove opened on the inner wall of the shell and is slidably connected thereto, a stabilizing slide rod is installed in the slide groove opened on the inner wall of the shell, the stabilizing slide rod corresponds to the filter screen slider and the piston slider and is slidably connected thereto, and a reset spring is installed on the stabilizing slide rod between the filter screen slider and the piston slider.

[0009] As a preferred embodiment of the present invention, a piston trigger mechanism is provided at the upper end of the shell, and the piston trigger mechanism includes an upper slide slot frame and an upper connecting rod, the lower end of the upper slide slot frame is connected to the outer surface of the shell, and the upper connecting rod is movably sleeved inside the upper slide slot frame, and upper limit blocks are connected to the middle positions on both sides of the upper connecting rod, and the upper limit blocks correspond to the slide slots opened on both sides of the upper slide slot frame and are slidably sleeved therewith, and an upper spring is installed between the upper slide slot frame and the upper connecting rod.

[0010] As a preferred embodiment of the present invention, the lower end of the upper connecting rod is connected with a piston block, a filter release top block and a filter block in sequence, and the piston block, the filter release top block and the filter block all penetrate the outer shell and are sealed and sleeved therewith, the piston block and the filter release top block correspond to the piston slider, and the filter block corresponds to the filter slider.

[0011] As a preferred embodiment of the present invention, a valve trigger mechanism is provided at the lower end of the shell, and the valve trigger mechanism includes a lower sliding groove frame and a lower connecting rod, the upper end of the lower sliding groove frame is connected to the outer surface of the shell, a lower spring is installed between the lower connecting rod and the lower sliding groove frame, and a lower limit block is connected between the two sides of the lower connecting rod, and the lower limit block corresponds to the sliding grooves opened on both sides of the lower sliding groove frame and is slidably connected therewith.

[0012] As a preferred embodiment of the present invention, the two ends of the lower connecting rod are respectively connected to a valve release top block and a valve clamping block, the valve release top block and the valve clamping block both penetrate the outer shell and are sealed and sleeved therewith, the valve release top block corresponds to the filter slider, and the valve clamping block corresponds to one end of the valve plate.

[0013] As a preferred embodiment of the present invention, one end of the valve plate corresponds to the end of the reset rod, rod holes are provided on both sides of the valve plate, a valve slide rod is movably sleeved inside the rod hole, the valve slide rod is installed in a slide groove provided at the bottom inner side of the shell, and a valve spring is sleeved and installed on the rod body at one end of the valve slide rod.

[0014] As a preferred embodiment of the present invention, an output pipe is connected to one side of the shell of the outer shell, and the output pipe corresponds to the position of the piston in the released state. A sewage outlet is connected to the lower end of the shell of the outer shell, and the sewage outlet corresponds to the position of the valve plate in the closed state.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a stainless steel filter with a multi-layer composite structure, which can effectively intercept impurities of different particle sizes, ensure the cleanliness of micro-irrigation water, improve irrigation quality, and reduce the risk of nozzle and dripper clogging; 2. The backwash cleaning method driven by the energy storage mechanism can clean the filter in all directions, which can completely remove the impurities attached to the filter. The backwashing effect is significant, effectively restoring the filtering performance of the filter and extending the service life of the filter; 3. The energy storage mechanism, reset mechanism and trigger system automatically control the backwashing process according to the pressure generated by the blockage, without manual intervention, which greatly reduces the labor intensity and management cost and improves the operating efficiency of the micro-irrigation system; 4. The overall structure is compact and occupies little space, making it easy to install and arrange in the micro-irrigation system.

[0016] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the attached picture: Figure 1 It is a three-dimensional schematic diagram of the entirety of a self-cleaning mesh filter for micro irrigation; Figure 2 It is a three-dimensional schematic diagram of a self-cleaning mesh filter for micro irrigation; Figure 3 It is a partially enlarged cross-sectional schematic diagram of a self-cleaning mesh filter for micro irrigation; Figure 4 It is a schematic cross-sectional diagram of the internal structure of a self-cleaning mesh filter for micro-irrigation; Figure 5 It is an enlarged schematic diagram of part A of a self-cleaning mesh filter for micro irrigation; Figure 6 It is an enlarged schematic diagram of the valve structure of a self-cleaning mesh filter for micro irrigation; Figure 7 It is an enlarged schematic diagram of a valve trigger mechanism of a self-cleaning mesh filter for micro irrigation; Figure 8 The figure is a disassembled schematic diagram of the piston reverse thrust mechanism of a self-cleaning mesh filter for micro irrigation.

[0018] In the figure: 1. shell; 2. output pipe; 3. drain outlet; 4. support frame; 5. anti-fouling cover; 6. push rod; 7. pressure plate; 8. adjusting nut; 9. threaded rod; 10. input pipe; 11. upper slide frame; 12. upper connecting rod; 13. lower slide frame; 14. lower connecting rod; 15. air inlet and outlet; 16. pressure regulating plate; 17. energy storage spring; 18. piston; 19. composite filter; 20. filter slider; 21. valve plate; 22. valve slider; 23. valve spring; 24. upper spring; 25. piston block; 26. filter release top block; 27. filter block; 28. reset spring; 29. ​​piston slider; 30. stabilizing slide bar; 31. upper limit block; 32. reset rod; 33. valve release top block; 34. valve block; 35. lower limit block; 36. lower spring; 37. sealing ring. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0020] like Figures 1 to 8 As shown, a self-cleaning mesh filter for micro-irrigation includes a shell 1 and a valve plate 21. An energy storage mechanism is arranged inside the shell 1, and the energy storage mechanism includes a piston 18 and a pressure regulating plate 16. An annular groove is arranged on the periphery of the piston 18, and a sealing ring 37 is installed in the inner sleeve of the annular groove. A piston slider 29 is connected to the periphery of the piston 18. A through hole is arranged on the plate body of the pressure regulating plate 16, and an energy storage spring 17 is installed between the pressure regulating plate 16 and the piston 18. A push rod 6 is connected to one side of the pressure regulating plate 16, and the push rod 6 passes through one end of the shell 1 and is movably sleeved therewith, and a pressure plate 7 is connected to the other end of the push rod 6.

[0021] In this setting, at the initial stage of using the device, the valve plate 21 and the output pipe 2 are in a closed state, and water is injected into the housing 1 through the input pipe 10. The water pressure squeezes and slides the piston 18. When sliding to a specified position, the piston slider 29 is engaged and locked with the piston block 25. When the piston 18 moves, the output pipe 2 is opened to output micro-irrigation water.

[0022] like Figures 1 to 8As shown, in a specific embodiment, a support frame 4 is connected to the outer side of one end of the shell 1, and a threaded rod 9 is movably connected to the center position of the support frame 4, and an adjusting nut 8 is threadedly sleeved on the rod body of the threaded rod 9. The diameter of the threaded rod 9 corresponds to the inner diameter of the sleeve connected between the pressure plates 7, and is movably sleeved therewith; an air inlet and outlet 15 is opened at the center position of one end of the shell 1, and an anti-fouling cover 5 is arranged on the periphery of the air inlet and outlet 15, the anti-fouling cover 5 is connected to the shell 1, and a plurality of air holes are opened at the connection between the anti-fouling cover 5 and the shell 1, and an input pipe 10 is installed at the center position of the other end of the shell 1.

[0023] In this configuration, the function of the pressure regulating plate 16 is to adjust the appropriate compression degree and strength of the energy storage spring 17 according to different water pressures.

[0024] like Figures 1 to 8 As shown, in a specific embodiment, a filtering mechanism is arranged inside the shell 1, and the filtering mechanism includes a composite filter 19, and a filter slider 20 is connected to the periphery of the composite filter 19, and a reset rod 32 is connected to the lower end of one side of the composite filter 19, and the filter slider 20 corresponds to the slide groove opened on the inner wall of the shell 1 and is slidably connected thereto, and a stabilizing slide rod 30 is installed in the slide groove opened on the inner wall of the shell 1, and the stabilizing slide rod 30 corresponds to the filter slider 20 and the piston slider 29 and is slidably connected thereto, and a reset spring 28 is installed on the stabilizing slide rod 30 between the filter slider 20 and the piston slider 29.

[0025] In this setting, when there are many impurities on the composite filter 19, the water pressure will move the composite filter 19 to the side of the piston 18, squeeze and lift the filter block 27, and engage with the filter block 27. At this time, during the lifting of the filter block 27, the piston block 25 is synchronously lifted by the upper connecting rod 12, and the piston 18 is released.

[0026] like Figures 1 to 8 As shown, in a specific embodiment, a piston trigger mechanism is provided at the upper end of the shell 1, and the piston trigger mechanism includes an upper slide frame 11 and an upper connecting rod 12, the lower end of the upper slide frame 11 is connected to the outer surface of the shell 1, and the upper connecting rod 12 is movably sleeved inside the upper slide frame 11, and upper limit blocks 31 are connected to the middle positions on both sides of the upper connecting rod 12, and the upper limit blocks 31 correspond to the slides opened on both sides of the upper slide frame 11 and are slidably sleeved therewith, and an upper spring 24 is installed between the upper slide frame 11 and the upper connecting rod 12; the lower end of the upper connecting rod 12 is sequentially connected with a piston block 25, a filter release top block 26 and a filter block 27, and the piston block 25, the filter release top block 26 and the filter block 27 all penetrate the shell 1 and are sealed and sleeved therewith, the piston block 25 and the filter release top block 26 correspond to the piston slider 29, and the filter block 27 corresponds to the filter slider 20.

[0027] In this arrangement, the filter block 27 at the lower end of the composite filter 19 pushes the valve release block 33, and drives the valve block to descend through the lower connecting rod 14, releasing the valve plate 21 to open. At this time, the piston 18 uses the elastic force of the energy storage spring 17 to push back and squeeze the water flow inside the shell 1, and squeezes the reset spring 28, while removing the stains on the composite filter 19 with high pressure, and the removed sewage will be discharged through the sewage outlet 3.

[0028] like Figures 1 to 8 As shown, in a specific embodiment, a valve trigger mechanism is provided at the lower end of the shell 1, and the valve trigger mechanism includes a lower sliding groove frame 13 and a lower connecting rod 14, the upper end of the lower sliding groove frame 13 is connected to the outer surface of the shell 1, and a lower spring 36 is installed between the lower connecting rod 14 and the lower sliding groove frame 13, and a lower limit block 35 is connected between the two sides of the lower connecting rod 14, and the lower limit block 35 corresponds to the sliding grooves opened on both sides of the lower sliding groove frame 13 and is slidably connected thereto; the two ends of the lower connecting rod 14 are respectively connected to a valve release top block 33 and a valve clamping block 34, the valve release top block 33 and the valve clamping block 34 both penetrate the shell 1 and are sealed and sleeved therewith, the valve release top block 33 corresponds to the filter slider 20, and the valve clamping block 34 corresponds to one end of the valve plate 21.

[0029] In this setting, when the piston 18 is pushed back to a certain position, the piston slider 29 will push the filter release block 26 to release the composite filter 19, and the composite filter 19 will rebound and reset due to the pressure of the reset spring 28. At the same time, the reset rod 32 at the lower end of the composite filter 19 pushes the valve plate 21 to reset and slide. When the valve plate 21 slides to the specified position, the valve block 34 will lock the valve plate 21.

[0030] like Figures 1 to 8 As shown, in a specific embodiment, one end of the valve plate 21 corresponds to the end of the reset rod 32, rod holes are provided on both sides of the valve plate 21, a valve slide rod 22 is movably sleeved inside the rod hole, the valve slide rod 22 is installed in a slide groove provided at the bottom inner side of the shell 1, and a valve spring 23 is sleeved on the rod body at one end of the valve slide rod 22; an output pipe 2 is connected to one side of the shell of the shell 1, and the output pipe 2 corresponds to the position of the piston 18 in the released state, and a sewage outlet 3 is connected to the lower end of the shell of the shell 1, and the sewage outlet 3 corresponds to the position of the valve plate 21 in the closed state.

[0031] In this setting, when the valve plate 21 is closed, the water pressure will squeeze the piston 18 again, causing the piston to reset and be locked by the piston block 25, waiting for the next cleaning action; the present invention adopts a stainless steel filter with a multi-layer composite structure, which can effectively intercept impurities of different particle sizes, ensure the cleanliness of micro-irrigation water, improve irrigation quality, and reduce the risk of clogging of nozzles and drippers; the filter is cleaned in all directions by driving the backwash cleaning method through the energy storage mechanism, which can completely remove impurities attached to the filter, and the backwashing effect is significant, effectively restoring the filtering performance of the filter and extending the service life of the filter; the energy storage mechanism, the reset mechanism and the trigger system automatically control the backwashing process according to the pressure generated by the blockage, without manual intervention, greatly reducing labor intensity and management costs, and improving the operating efficiency of the micro-irrigation system; the overall structural design is compact, occupies a small space, and is easy to install and arrange in the micro-irrigation system.

[0032] The implementation principle of a self-cleaning mesh filter for micro irrigation in this embodiment is as follows: The present invention adopts a stainless steel filter screen with a multi-layer composite structure, which can effectively intercept impurities of different particle sizes, ensure the cleanliness of micro-irrigation water, improve irrigation quality, and reduce the risk of clogging of nozzles and drippers; the filter screen is cleaned in all directions by a backwash cleaning method driven by an energy storage mechanism, which can completely remove impurities attached to the filter screen, and the backwashing effect is significant, effectively restoring the filtering performance of the filter screen and extending the service life of the filter; the energy storage mechanism, the reset mechanism and the trigger system automatically control the backwashing process according to the pressure generated by the clogging, without manual intervention, greatly reducing labor intensity and management costs, and improving the operating efficiency of the micro-irrigation system; the overall structure is compact in design, occupies a small space, and is easy to install and arrange in the micro-irrigation system.

[0033] In the initial stage of using the device, the valve plate 21 and the output pipe 2 are in a closed state, and water is injected into the housing 1 through the input pipe 10. The water pressure squeezes and slides the piston 18. When sliding to the specified position, the piston slider 29 and the piston block 25 are locked. While the piston 18 moves, the piston 18 is offset from the output pipe 2. At this time, the output pipe 2 is in an open state, and then micro-irrigation is output. The function of the pressure regulating plate 16 is to adjust the appropriate compression degree and strength of the energy storage spring 17 according to different water pressures; to achieve the spring strength that is most suitable for the current water pressure; to ensure that the piston 18 can be smoothly reset.

[0034] When there are many impurities on the composite filter 19, the water pressure will move the composite filter 19 to the side of the piston 18, and squeeze and lift the filter block 27, and engage with the filter block 27. At this time, during the lifting process of the filter block 27, the piston block 25 is lifted synchronously through the upper connecting rod 12, and the piston 18 is released; At the same time, the filter block 27 at the lower end of the composite filter 19 pushes the valve release block 33, and drives the valve block to descend through the lower connecting rod 14, releasing the valve plate 21 to open. At this time, the piston 18 uses the elastic force of the energy storage spring 17 to push back and squeeze the water flow inside the housing 1, and squeezes the reset spring 28, while the stains on the composite filter 19 are removed by high pressure, and the removed sewage will be discharged through the sewage outlet 3; When the piston 18 is pushed back to a certain position, the piston slider 29 will push the filter release block 26 to release the composite filter 19, and the composite filter 19 will rebound and reset by the pressure of the reset spring 28. At the same time, the reset rod 32 at the lower end of the composite filter 19 pushes the valve plate 21 to reset and slide. When the valve plate 21 slides to the specified position, the valve block 34 will lock the valve plate 21; at this time, when the valve plate 21 is closed, the water pressure will squeeze the piston 18 again, causing the piston to reset and be locked by the piston block 25, waiting for the next cleaning action.

Claims

1. A self-cleaning mesh filter for micro irrigation, comprising a housing (1) and a valve plate (21), characterized in that: An energy storage mechanism is arranged inside the housing (1), and the energy storage mechanism comprises a piston (18) and a pressure regulating plate (16). An annular groove is provided on the periphery of the piston (18), and a sealing ring (37) is sleeved and installed inside the annular groove. A piston slider (29) is connected to the periphery of the piston (18). A through hole is provided on the plate body of the pressure regulating plate (16), and an energy storage spring (17) is installed between the pressure regulating plate (16) and the piston (18). A push rod (6) is connected to one side of the pressure regulating plate (16), and the push rod (6) passes through one end of the housing (1) and is movably sleeved therewith. The other end of the push rod (6) is connected to a pressure plate (7).

2. A self-cleaning mesh filter for micro irrigation according to claim 1, characterized in that: A support frame (4) is connected to the outside of one end of the housing (1), a threaded rod (9) is movably connected to the center of the support frame (4), an adjusting nut (8) is threadedly sleeved on the rod body of the threaded rod (9), the diameter of the threaded rod (9) corresponds to the inner diameter of a sleeve connected between the pressure plates (7), and is movably sleeved therewith.

3. A self-cleaning mesh filter for micro irrigation according to claim 1, characterized in that: An air inlet and outlet (15) is provided at the center of one end of the housing (1), an anti-fouling cover (5) is provided on the periphery of the air inlet and outlet (15), the anti-fouling cover (5) is connected to the housing (1), a plurality of air holes are provided at the connection between the anti-fouling cover (5) and the housing (1), and an input pipe (10) is installed at the center of the other end of the housing (1).

4. A self-cleaning mesh filter for micro irrigation according to claim 3, characterized in that: A filter mechanism is arranged inside the housing (1), the filter mechanism comprising a composite filter (19), a filter slider (20) being connected to the periphery of the composite filter (19), a reset rod (32) being connected to the lower end of one side of the composite filter (19), the filter slider (20) corresponding to a slide groove provided on the inner wall of the housing (1) and being slidably sleeved therewith, a stabilizing slide rod (30) being installed in the slide groove provided on the inner wall of the housing (1), the stabilizing slide rod (30) corresponding to the filter slider (20) and the piston slider (29) and being slidably sleeved therewith, and a reset spring (28) being sleeved and installed on the stabilizing slide rod (30) between the filter slider (20) and the piston slider (29).

5. A self-cleaning mesh filter for micro irrigation according to claim 4, characterized in that: A piston trigger mechanism is provided at the upper end of the housing (1), and the piston trigger mechanism comprises an upper slide slot frame (11) and an upper connecting rod (12). The lower end of the upper slide slot frame (11) is connected to the outer surface of the housing (1), and the upper connecting rod (12) is movably sleeved inside the upper slide slot frame (11). Upper limit blocks (31) are connected to the middle positions on both sides of the upper connecting rod (12). The upper limit blocks (31) correspond to the slide slots provided on both sides of the upper slide slot frame (11) and are slidably sleeved therewith. An upper spring (24) is installed between the upper slide slot frame (11) and the upper connecting rod (12).

6. A self-cleaning mesh filter for micro irrigation according to claim 5, characterized in that: The lower end of the upper connecting rod (12) is connected in sequence to a piston clamping block (25), a filter release top block (26) and a filter clamping block (27); the piston clamping block (25), the filter release top block (26) and the filter clamping block (27) all penetrate the housing (1) and are sealed and sleeved therewith; the piston clamping block (25) and the filter release top block (26) correspond to the piston slider (29), and the filter clamping block (27) corresponds to the filter slider (20).

7. A self-cleaning mesh filter for micro irrigation according to claim 6, characterized in that: A valve trigger mechanism is provided at the lower end of the housing (1), and the valve trigger mechanism comprises a lower slide groove frame (13) and a lower connecting rod (14); the upper end of the lower slide groove frame (13) is connected to the outer surface of the housing (1); a lower spring (36) is installed between the lower connecting rod (14) and the lower slide groove frame (13); a lower limit block (35) is connected between the two sides of the lower connecting rod (14); the lower limit block (35) corresponds to the slide grooves provided on the two sides of the lower slide groove frame (13) and is slidably connected thereto.

8. The self-cleaning mesh filter for micro irrigation according to claim 7, characterized in that: The two ends of the lower connecting rod (14) are respectively connected to a valve release top block (33) and a valve clamping block (34); the valve release top block (33) and the valve clamping block (34) both penetrate the housing (1) and are sealed and sleeved therewith; the valve release top block (33) corresponds to the filter slider (20), and the valve clamping block (34) corresponds to one end of the valve plate (21).

9. A self-cleaning mesh filter for micro irrigation according to claim 8, characterized in that: One end of the valve plate (21) corresponds to the end of the reset rod (32), and rod holes are provided on both sides of the valve plate (21). A valve slide rod (22) is movably sleeved inside the rod hole. The valve slide rod (22) is installed in a slide groove provided at the bottom of the inner side of the housing (1), and a valve spring (23) is sleeved and installed on the rod body at one end of the valve slide rod (22).

10. A self-cleaning mesh filter for micro irrigation according to claim 9, characterized in that: An output pipe (2) is connected to one side of the shell of the shell (1), and the output pipe (2) corresponds to the position of the piston (18) in the released state. A sewage outlet (3) is connected to the lower end of the shell of the shell (1), and the sewage outlet (3) corresponds to the position of the valve plate (21) in the closed state.

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