A modular farmland water-saving irrigation device

Abstract

The present invention relates to a modular farmland water-saving irrigation device applied to the field of agricultural irrigation. Through the setting of a self-monitoring filtering unit, on the one hand, the blockage situation can be judged by automatically detecting the water pressure. On the other hand, after the blockage, it can temporarily and automatically replace the filter disc with effective filtering. Compared with the prior art, it can effectively avoid the impact on the irrigation water volume caused by the failure to replace or miss the replacement of the filter element in time, effectively ensure that the crops can be irrigated stably, and effectively ensure the stable growth of the crops; at the same time, when the blockage occurs, the water pressure on the side of the multi-position filter away from the water source is significantly reduced, which will cause obvious changes in the sensing bin. With the help of a micro camera and an alarm, an alarm can be issued after multiple blockages and automatic replacement of the filter disc, which is convenient for staff to locate abnormal multi-position filters and replace multiple filter discs at one time, effectively reducing the frequency of manual replacement and reducing the impact on the irrigation process.

Description

Technical Field

[0001] The present invention relates to a water-saving irrigation device, and in particular to a modular farmland water-saving irrigation device applied to the field of agricultural irrigation. Background Art

[0002] For modular farmland, which is large in scale and planted with many crops, intelligent drip irrigation technology is generally used for water-saving irrigation of crops in each field.

[0003] However, the water used for farmland irrigation is mostly from rivers, which contains impurities such as silt, microorganisms, and moss. Long-term irrigation can easily lead to blockage of water pipes and drippers. In the prior art, filters are provided to reduce the blockage of drippers caused by impurities. For example, Chinese patent CN116941506A discloses a drip irrigation system and Chinese patent CN213725123U discloses a drip irrigation filter.

[0004] However, the filter needs to be replaced manually at regular intervals. For large-scale modular farmland, the entire drip irrigation system is distributed over a large area. It is often easy for some filter elements to not be replaced in time. In serious cases, they may even be missed, which affects water delivery and causes a significant difference between the actual irrigation water volume and the expected water volume for crops, affecting the stable and uniform growth of crops. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing drip irrigation system has a large distribution area, and it is easy for the filter element to be not replaced in time or to be replaced inadvertently, thus affecting the stable irrigation of crops.

[0006] In order to solve the above problems, the present invention provides a modular farmland water-saving irrigation device, comprising a main pipeline, a shunt pipe fixedly connected to the end of the main pipeline, and a plurality of drip irrigation pipes respectively fixedly connected to the outer ends of the shunt pipes, the main pipeline and the ends of the drip irrigation pipes close to the shunt pipes are fixedly installed with self-monitoring filter units, the self-monitoring filter unit comprises a filter housing and a multi-position filter fixedly connected to the filter housing, the filter housing comprises a filter terminal, a pressure measuring terminal and a connecting pipe fixedly connected to the filter terminal and the pressure measuring terminal, and the multi-position filter is fixedly embedded in the middle of the filter terminal;

[0007] The multi-position filter includes a filter section with a controller, a filter section fixedly connected to the upper end of the filter section, and two sealing doors respectively installed at the left and right ends of the filter section. The filter section is fixedly embedded in the filter terminal. A disc filter is installed inside the filter section through an electric shaft. The disc filter is located in the middle of the filter section and extends into the filter section. The disc filter includes a filter disc, a plurality of mounting holes drilled on the filter disc and distributed in a circular array, and a plurality of filter sheets respectively adsorbed on the plurality of mounting holes, one of the mounting holes is directly opposite to the filter terminal. The filter disc is also provided with a plurality of self-compensation units respectively corresponding to the plurality of mounting holes, and the electric shaft and the self-compensation unit are connected to the controller signal.

[0008] The self-compensation unit includes a plurality of positioning columns respectively fixedly connected to the inner wall of the mounting hole, and a magnetic sealing ring and an electromagnetic block coaxially arranged with the mounting hole. The plurality of positioning columns are connected in series with each other and connected to the circuit where the electromagnetic block is located. The magnetic sealing ring and the electromagnetic block correspond to each other, and the electromagnetic block is located inside the filter disc. The inner and outer circle edges of the magnetic sealing ring are fixedly connected to the surface of the filter disc.

[0009] In the above-mentioned modular farmland water-saving irrigation device, through the setting of the self-monitoring filtering unit, on the one hand, the blockage situation can be judged by automatic detection of water pressure, and on the other hand, after blockage, it can temporarily and automatically replace the effective filtering filter. Compared with the existing technology, it can effectively avoid the impact on irrigation water volume caused by failure to replace or miss replacement of the filter element in time, effectively ensure that crops can be irrigated stably, and effectively ensure the stable growth of crops.

[0010] As a further improvement of the present application, the cross-section of the mounting hole is a convex structure, and the convex large inner diameter end faces the water source side, and multiple positioning columns are located on the middle vertical inner wall of the convex mounting hole.

[0011] As a further improvement of the present application, the positioning column includes an insulating sleeve, an adsorption sheet fixedly connected to one end of the insulating sleeve facing the filter end, a movable contact piece fixedly connected to the vertical inner wall of the insulating sleeve, and a fixed contact piece fixedly installed on the inner wall of the mounting hole, the fixed contact piece is located on the inner side of the insulating sleeve, the movable contact piece and the fixed contact piece are both electrically connected to the circuit where the electromagnetic block is located, and when the movable contact pieces and the fixed contact pieces on multiple positioning columns are in contact with each other, the circuit where the electromagnetic block is located is turned on.

[0012] As a further improvement of the present application, the insulating sheath is made of an elastic sealing material, the adsorption sheet is made of a magnetic material, the filter sheet is composed of a ferromagnetic frame and a metal filter screen fixed in the ferromagnetic frame, and the adsorption sheet and the ferromagnetic frame are adsorbed to each other;

[0013] An external pressure sensor is also installed on the vertical inner wall of the installation hole. The position of the external pressure sensor does not coincide with the positioning column, and the pressure sensor is connected to the controller signal.

[0014] As a further improvement of the present application, the magnetic sealing ring is made of an elastic sealing material with a magnetic sheet embedded inside, and the inner ring diameter of the magnetic sealing ring is smaller than the outer diameter of the filter end, and the inner diameter of the filter end is larger than the maximum inner diameter of the mounting hole.

[0015] As another improvement of the present application, the outer end of the pressure measuring terminal is connected to a water pressure display assembly through a clamp, and the water pressure display assembly includes two side panels fixedly connected to the upper end of the clamp, a sensing chamber fixedly connected between the two side panels, and two water pipes fixedly connected between the filter terminal and the side panels, respectively, and the water pipes are fixedly passed through the side panels and communicated with the interior of the sensing chamber.

[0016] As another improved supplement to the present application, the end of the connecting tube is fixedly passed through the filter end and extends into the interior thereof, and a middle-shaped tube is fixedly connected between the outer end of the connecting tube located inside the filter end and the inner wall of the filter end, and the two ends of the middle-shaped tube are respectively connected to the water pipe and the connecting tube, and the middle-shaped tube is connected to a sealing plate through an elastic rope toward the radial inside of the connecting tube, and a water inlet hole is drilled at the outer end of the middle-shaped tube close to the other radial inner wall.

[0017] As another improvement supplement of the present application, an internal pressure sensor is selectively provided on the radial inner wall of the middle tube away from the sealing plate, and the internal pressure sensor is connected to the controller signal. A miniature camera and an alarm are also installed on the filter end, and the shooting end of the miniature camera is directed toward the sensing bin, and the miniature camera and the alarm are both connected to the controller signal.

[0018] As another improvement supplement of the present application, a pre-liquid inlet plate is fixedly connected to the top of the sensing bin, a liquid-containing vertical bag is fixedly connected between the middle of the lower end of the pre-liquid inlet plate and the bottom end of the sensing bin, the liquid-containing vertical bag and the pre-liquid inlet plate are interconnected, and two water pipes are respectively located on both sides of the two liquid-containing vertical bags, and the two are symmetrical about the center point of the liquid-containing vertical bag.

[0019] As another improvement supplement of the present application, the pre-liquid-intake plate and the upper end of the sensing bin are both hard and transparent structures, the liquid-containing vertical bag is an elastic sealing structure, and the inside of the liquid-containing vertical bag is filled with colored liquid. When the liquid-containing vertical bag is in its original state, the liquid level of the colored liquid is not lower than 2 / 3 of the height of the liquid-containing vertical bag.

[0020] In summary, through the setting of the self-monitoring filtration unit, on the one hand, the blockage situation can be judged by automatic detection of water pressure, and on the other hand, after blockage, it can temporarily and automatically replace the effective filtering filter. Compared with the existing technology, it can effectively avoid the impact on the irrigation water volume caused by failure to replace or miss replacement of the filter element in time, effectively ensure that the crops can be irrigated stably, and effectively ensure the stable growth of crops; at the same time, when blockage occurs, the water pressure on the side of the multi-position filter away from the water source is significantly reduced, which will cause obvious changes in the sensing bin. With the help of the micro camera and the alarm, it can alarm after multiple blockages and automatic replacement of the filter, which is convenient for staff to locate abnormal multi-position filters and replace multiple filters at one time, effectively reducing the frequency of manual replacement and reducing the impact on the irrigation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a top view layout diagram of the device of the first and second embodiments of the present application;

[0022] Figure 2 It is a left side stereoscopic diagram of the self-monitoring filter unit of the first and second embodiments of the present application;

[0023] Figure 3 A right side perspective view of the self-monitoring filter unit of the first and second embodiments of the present application;

[0024] Figure 4 A half-cutaway perspective view of a multi-position filter according to the first and second embodiments of the present application;

[0025] Figure 5 It is a front view of the disc filter of the first and second embodiments of the present application;

[0026] Figure 6 It is a cross-sectional view of the positioning column of the first and second embodiments of the present application;

[0027] Figure 7 Schematic diagram of a partial cross section of a disc filter according to the first and second embodiments of the present application;

[0028] Figure 8 This is a diagram showing the changing process of the filter disc before and after use of the first and second embodiments of the present application;

[0029] Fig. 9 A top view of a self-monitoring filtration unit according to a second embodiment of the present application;

[0030] Fig.10 for Fig. 9 Schematic diagram at A in the middle;

[0031] Fig.11A partial top view of a water pressure display assembly according to a second embodiment of the present application;

[0032] Fig.12 This is a cross-sectional schematic diagram of the sensing chamber of the second embodiment of the present application when the water pressure is normal;

[0033] Fig.13 This is a cross-sectional schematic diagram of the sensing chamber of the second embodiment of the present application after the water pressure is reduced.

[0034] Description of the numbers in the figure:

[0035] 11 main pipeline, 12 shunt pipe, 13 drip irrigation pipe, 2 filter housing, 21 filter terminal, 22 pressure measuring terminal, 23 connecting pipe, 3 water pressure display component, 31 water guide pipe, 32 side plate, 33 sensing chamber, 4 multi-position filter, 41 filter section, 42 filter section, 43 sealing door, 51 filter disc, 52 filter piece, 501 mounting hole, 502 electric shaft, 6 positioning column, 61 adsorption piece, 62 insulating sheath, 631 moving contact piece, 632 fixed contact piece, 71 magnetic sealing ring piece, 72 electromagnetic block, 81 middle tube, 82 sealing plate, 801 water inlet hole, 91 liquid vertical bag, 92 pre-liquid inlet plate. DETAILED DESCRIPTION

[0036] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0037] The first implementation method:

[0038] Figure 1-3 Shown is a modular farmland water-saving irrigation device, comprising a main pipeline 11, a shunt pipe 12 fixedly connected to the end of the main pipeline 11, and a plurality of drip irrigation pipes 13 respectively fixedly connected to the outer ends of the shunt pipe 12. Self-monitoring filter units are fixedly installed on the ends of the main pipeline 11 and the drip irrigation pipes 13 close to the shunt pipe 12. The self-monitoring filter unit comprises a filter housing 2 and a multi-position filter 4 fixedly connected to the filter housing 2. The filter housing 2 comprises a filter terminal 21, a pressure measuring terminal 22, and a connecting pipe 23 fixedly connecting the filter terminal 21 and the pressure measuring terminal 22. The multi-position filter 4 is fixedly embedded in the middle of the filter terminal 21.

[0039] like Figure 4 The multi-position filter 4 includes a filter section 41 with a controller, a filter section 42 fixedly connected to the upper end of the filter section 41, and two sealing doors 43 respectively installed at the left and right ends of the filter section 41. The filter section 41 is fixedly embedded in the filter end 21. A disc filter is installed inside the filter section 41 through an electric shaft 502. The disc filter is located in the middle of the filter section 41 and extends into the filter section 42. Figure 5The disc filter includes a filter disc 51, a plurality of mounting holes 501 drilled on the filter disc 51 and distributed in a circular array, and a plurality of filter sheets 52 respectively adsorbed on the plurality of mounting holes 501, the filter sheet 52 is composed of a ferromagnetic frame and a metal filter screen fixed in the ferromagnetic frame, and the adsorption sheet 61 and the ferromagnetic frame are adsorbed to each other; one of the mounting holes 501 is directly opposite to the filter end 21, and a plurality of filter sheets 52 are arranged on a filter disc 51. When in use, when the filter sheet 52 in use is blocked, the water pressure on the side of the filter disc 51 close to the water source increases. At this time, after receiving the signal, the controller can control the electric shaft 502 to rotate a fixed angle, so that the blocked filter sheet 52 is rotated away, and the adjacent filter sheet 52 is rotated to the filter end 21, so as to realize the replacement of the filter sheet 52. Compared with the prior art, no manual replacement is required, thereby effectively avoiding the blockage that is not handled in time and affecting the water irrigation amount of crops.

[0040] The filter disc 51 is also provided with a plurality of self-compensation units respectively corresponding to the plurality of mounting holes 501. The electric rotating shaft 502 and the self-compensation unit are connected to the controller signal. The self-compensation unit includes a plurality of positioning posts 6 respectively fixedly connected to the inner wall of the mounting hole 501 and a magnetic sealing ring sheet 71 and an electromagnetic block 72 coaxially arranged with the mounting hole 501. The plurality of positioning posts 6 are connected in series with each other and connected to the circuit where the electromagnetic block 72 is located. The magnetic sealing ring sheet 71 corresponds to the electromagnetic block 72, and the electromagnetic block 72 is located inside the filter disc 51. The inner and outer ring edges of the magnetic sealing ring sheet 71 are fixedly connected to the surface of the filter disc 51. Figure 6 The positioning column 6 includes an insulating sleeve 62, an adsorption sheet 61 fixedly connected to one end of the insulating sleeve 62 facing the filter end 21, a moving contact piece 631 fixedly connected to the vertical inner wall of the insulating sleeve 62, and a fixed contact piece 632 fixedly installed on the inner wall of the mounting hole 501. The insulating sleeve 62 is made of elastic sealing material, the adsorption sheet 61 is made of magnetic material, the fixed contact piece 632 is located on the inner side of the insulating sleeve 62, and the moving contact piece 631 and the fixed contact piece 632 are both electrically connected to the circuit where the electromagnetic block 72 is located. When the moving contact pieces 631 and the fixed contact pieces 632 on multiple positioning columns 6 are in contact with each other, the circuit where the electromagnetic block 72 is located is turned on, such as Figure 8, the filter disc 52 can be installed by the magnetic attraction on the surface of the positioning column 6. When filtering water facing the filter end 21, the water pressure will push the filter disc 52 to move toward the inside of the mounting hole 501, thereby squeezing the positioning column 6. On the one hand, it can contact the inner wall of the mounting hole 501, making it more stable in the mounting hole 501. On the other hand, the positioning column 6 will be deformed when squeezed, thereby bringing the moving contact piece 631 and the fixed contact piece 632 closer to each other, so that the two are in contact with each other, thereby turning on the circuit where the electromagnetic block 72 is located. At this time, the electromagnetic block 72 is energized, generating a magnetic repulsive force on the magnetic sealing ring piece 71, which can cause the magnetic sealing ring piece 71 to deform toward the side of the filter end 21, thereby forming a protrusion on the outside of the connection between the filter end 21 and the filter disc 51, and then forming a sealing layer at the outer edge of the connection between the filter end 21 and the filter disc 51, thereby effectively ensuring that water is not easily leaked during transportation.

[0041] An external pressure sensor is also installed on the vertical inner wall of the mounting hole 501. The position of the external pressure sensor does not overlap with the positioning column 6, and the pressure sensor is connected to the controller signal. When the filter 52 is gradually blocked, its resistance to water increases, and the thrust of the water also increases. At this time, the data generated on the external pressure sensor also gradually increases. When it increases to a preset threshold, the controller can determine that the filter 52 is blocked.

[0042] like Figure 7 The cross-section of the mounting hole 501 is a convex structure, and the large inner diameter end of the convex shape faces the water source side. Multiple positioning columns 6 are located on the middle vertical inner wall of the convex mounting hole 501, which is convenient for the installation and replacement of the filter 52. At the same time, under the action of water flow pressure, the filter 52 can also be compressed to improve its stability.

[0043] The magnetic sealing ring 71 is made of an elastic sealing material with a magnetic sheet embedded inside. The magnetic pole of the magnetic sheet close to one end of the electromagnetic block 72 is the same as the magnetic pole of the electromagnetic block 72 after power is supplied, so that it can generate a magnetic repulsive force on the magnetic sealing ring 71 after power is supplied, and the inner ring diameter of the magnetic sealing ring 71 is smaller than the outer diameter of the filter terminal 21, and the inner diameter of the filter terminal 21 is larger than the maximum inner diameter of the mounting hole 501. When the mounting hole 501 is rotated to the filter terminal 21 and is coaxial with it, the edge of the pressure measuring terminal 22 can contact the magnetic sealing ring 71, and when the magnetic sealing ring 71 bulges outward, the bulge can contact the outer edge of the filter terminal 21, thereby achieving a better sealing effect.

[0044] It is worth noting that solenoid valves are installed on the main pipeline 11 and multiple drip irrigation pipes 13. When the controller determines that the filter 52 is blocked, the controller can control the corresponding solenoid valve to be temporarily closed, so that the filter 52 loses the squeezing of water pressure. At this time, the positioning column 6 is reset, and the magnetic sealing ring 71 is restored to the horizontal state. Then the electric shaft 502 is controlled to rotate, so that the clean filter 52 is rotated to the filter end 21, and then the solenoid valve is controlled to open to resume irrigation of crops. The whole process lasts for a short time. Compared with each manual maintenance, the impact on the amount of water for crop irrigation is greatly reduced.

[0045] In the above-mentioned modular farmland water-saving irrigation device, through the setting of the self-monitoring filtering unit, on the one hand, the blockage situation can be judged by automatically detecting the water pressure, and on the other hand, after blockage, it can temporarily and automatically replace the effective filtering filter 52. Compared with the existing technology, it can effectively avoid the impact on the irrigation water volume caused by failure to replace or miss replacement of the filter element in time, effectively ensure that the crops can be stably irrigated, and effectively ensure the stable growth of the crops.

[0046] The second implementation method:

[0047] Based on the first embodiment, this embodiment adds a water pressure display component 3, and the rest of the parts are consistent with the first embodiment.

[0048] Fig. 9 As shown, the outer end of the pressure measuring terminal 22 is connected to the water pressure display assembly 3 through a clamp, and the water pressure display assembly 3 includes two side plates 32 fixedly connected to the upper end of the clamp, a sensing chamber 33 fixedly connected between the two side plates 32, and two water pipes 31 respectively fixedly connected between the filter terminal 21 and the side plates 32. The water pipes 31 are fixedly penetrated through the side plates 32 and communicated with the inside of the sensing chamber 33. The end of the connecting pipe 23 is fixedly penetrated through the filter terminal 21 and extends into the inside thereof. A middle-shaped tube 81 is fixedly connected between the outer end of the connecting pipe 23 located inside the filter terminal 21 and the inner wall of the filter terminal 21. The two ends of the middle-shaped tube 81 are respectively communicated with the water pipe 31 and the connecting pipe 23. The middle-shaped tube 81 faces the connecting pipe 23. A sealing plate 82 is connected to the radial inner part through an elastic rope, and a water inlet hole 801 is drilled at the outer end of the middle tube 81 near the other radial inner wall. When the water pressure is normal, after water enters the connecting pipe 23, part of the water will enter the middle tube 81, thereby pushing the sealing plate 82 to move outward, thereby blocking the water inlet hole 801. At this time, it is difficult for water to enter the water guide pipe 31; and when the filter 52 is blocked, it will cause the water pressure on the side of the filter 52 away from the water source to change. In the absence of sufficient water pressure support, the sealing plate 82 gradually moves to the side of the connecting pipe 23 and gradually separates from the water inlet hole 801. At this time, part of the water can enter the sensing bin 33 along the water inlet hole 801 and the water guide pipe 31, causing changes in the sensing bin 33.

[0049] An internal pressure sensor is selectively provided on the radial inner wall of the middle tube 81 away from the sealing plate 82. The internal pressure sensor is connected to the controller signal. When the water pressure is normal, the sealing plate 82 will conflict with the internal pressure sensor, thereby causing it to generate data. When the water pressure becomes smaller, the data will gradually become smaller or even disappear. A miniature camera and an alarm are also installed on the filter end 21. The shooting end of the miniature camera faces the sensing chamber 33. The miniature camera and the alarm are both connected to the controller signal.

[0050] like Figure 11-12 A pre-liquid inlet plate 92 is fixedly connected to the top of the sensing bin 33, and a liquid-containing vertical capsule 91 is fixedly connected between the middle of the lower end of the pre-liquid inlet plate 92 and the bottom end of the sensing bin 33. The liquid-containing vertical capsule 91 and the pre-liquid inlet plate 92 divide the interior of the sensing bin 33 into two independent cavities. The liquid-containing vertical capsule 91 and the pre-liquid inlet plate 92 are interconnected, and the two water pipes 31 are respectively located on both sides of the two liquid-containing vertical capsules 91, and the two are symmetrical about the center point of the liquid-containing vertical capsule 91. The pre-liquid inlet plate 92 and the upper end of the sensing bin 33 are both hard and transparent structures, and the liquid-containing vertical capsule 91 is an elastic sealing structure, and the liquid-containing vertical capsule 91 is filled with colored liquid. When the liquid-containing vertical capsule 91 is in its original state, the liquid level of the colored liquid is not lower than 2 / 3 of the height of the liquid-containing vertical capsule 91. Fig.13 When the water pressure decreases, water enters the two sides of the liquid-containing vertical capsule 91 in the sensing bin 33 synchronously through the water pipes 31 on both sides, thereby generating an extrusion force toward the middle of the two sides of the liquid-containing vertical capsule 91, thereby causing the liquid level of the colored liquid to rise and gradually enter the pre-liquid inlet plate 92. The pre-liquid inlet plate 92 has a larger cross-section, so that the upper surface of the sensing bin 33 presents a large area of ​​color. At this time, the micro camera can obtain the image information of the change at this location, and then the controller controls the filter 52 to be replaced, and the location returns to normal. When it is blocked again, the above phenomenon will also occur. When the number of times the micro camera obtains the change is close to the threshold, it can feedback to the controller, which can alarm through the alarm to assist the staff to replace the multiple filter discs 52 in the multi-position filter 4 in time. In order to avoid the situation where blockage is not replaced in time, the threshold of the number of times the micro camera obtains the change can be set to be less than the number of filter discs 52, and the difference between the two is 1, so that after the alarm, the staff has enough time to replace.

[0051] In summary, through the setting of the self-monitoring filtering unit, on the one hand, the blockage situation can be judged by automatically detecting the water pressure. On the other hand, after blockage, it can temporarily and automatically replace the effective filtering filter 52. Compared with the existing technology, it can effectively avoid the impact on the irrigation water volume caused by the failure to replace or miss the replacement of the filter element in time, effectively ensure that the crops can be irrigated stably, and effectively ensure the stable growth of the crops; at the same time, when blockage occurs, the water pressure on the side of the multi-position filter 4 away from the water source is significantly reduced, which will cause obvious changes in the sensing chamber 33. With the help of the micro camera and the alarm, it can alarm after multiple blockages and automatic replacement of the filter 52, which is convenient for the staff to locate the abnormal multi-position filter 4 and replace multiple filter discs 52 at one time, effectively reducing the frequency of manual replacement and reducing the impact on the irrigation process.

[0052] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A modular farmland water-saving irrigation device, characterized in that: The invention comprises a main pipeline (11), a shunt pipe (12) fixedly connected to the end of the main pipeline (11), and a plurality of drip irrigation pipes (13) respectively fixedly connected to the outer ends of the shunt pipes (12). The main pipeline (11) and the drip irrigation pipes (13) are both fixedly installed with self-monitoring filter units at their ends close to the shunt pipes (12). The self-monitoring filter unit comprises a filter housing (2) and a multi-position filter (4) fixedly connected to the filter housing (2). The filter housing (2) comprises a filter end (21), a pressure measuring end (22), and a connecting pipe (23) fixedly connecting the filter end (21) and the pressure measuring end (22). The multi-position filter (4) is fixedly embedded in the middle of the filter end (21). The multi-position filter (4) comprises a filter section (41) with a controller, a filter section (42) fixedly connected to the upper end of the filter section (41), and two sealing doors (43) respectively mounted on the left and right ends of the filter section (41); the filter section (41) is fixedly embedded in the filter end head (21); a disc filter screen is mounted inside the filter section (41) via an electric rotating shaft (502); the disc filter screen is located in the middle of the filter section (41) and extends into the filter section (42); the disc filter screen comprises a filter disc (51), a plurality of mounting holes (501) cut on the filter disc (51) and distributed in a circular array, and a plurality of filter sheets (52) respectively adsorbed on the plurality of mounting holes (501); one of the mounting holes (501) is directly opposite to the filter end head (21); the filter disc (51) is also provided with a plurality of self-compensation units respectively corresponding to the plurality of mounting holes (501); the electric rotating shaft (502) and the self-compensation units are connected to the controller signal; The self-compensation unit comprises a plurality of positioning posts (6) respectively fixedly connected to the inner wall of the mounting hole (501), and a magnetic sealing ring sheet (71) and an electromagnetic block (72) coaxially arranged with the mounting hole (501); the plurality of positioning posts (6) are connected in series with each other and connected to the circuit where the electromagnetic block (72) is located; the magnetic sealing ring sheet (71) and the electromagnetic block (72) correspond to each other, and the electromagnetic block (72) is located inside the filter disc (51); the inner and outer ring edges of the magnetic sealing ring sheet (71) are both fixedly connected to the surface of the filter disc (51); The positioning column (6) comprises an insulating sleeve (62), an adsorption sheet (61) fixedly connected to one end of the insulating sleeve (62) facing the filter end (21), a movable contact sheet (631) fixedly connected to the vertical inner wall of the insulating sleeve (62), and a fixed contact sheet (632) fixedly mounted on the inner wall of the mounting hole (501), wherein the fixed contact sheet (632) is located inside the insulating sleeve (62), the movable contact sheet (631) and the fixed contact sheet (632) are both electrically connected to the circuit where the electromagnetic block (72) is located, and when the movable contact sheets (631) and the fixed contact sheets (632) on the plurality of positioning columns (6) are in contact with each other, the circuit where the electromagnetic block (72) is located is turned on, the insulating sleeve (62) is made of elastic sealing material, the adsorption sheet (61) is made of magnetic material, the filter sheet (52) is composed of a ferromagnetic frame and a metal filter screen fixed in the ferromagnetic frame, and the adsorption sheet (61) and the ferromagnetic frame are adsorbed to each other; An external pressure sensor is also installed on the vertical inner wall of the mounting hole (501); the position of the external pressure sensor does not overlap with the positioning column (6), and the pressure sensor is connected to the controller signal; the magnetic sealing ring (71) is made of an elastic sealing material with a magnetic plate embedded inside, and the inner ring diameter of the magnetic sealing ring (71) is smaller than the outer diameter of the filter end (21), and the inner diameter of the filter end (21) is larger than the maximum inner diameter of the mounting hole (501).

2. A modular farmland water-saving irrigation device according to claim 1, characterized in that: The cross section of the mounting hole (501) is a convex structure, with the convex large inner diameter end facing the water source, and the plurality of positioning columns (6) are located on the middle vertical inner wall of the convex mounting hole (501).

3. The modular farmland water-saving irrigation device according to claim 1, characterized in that: The outer end of the pressure measuring terminal (22) is connected to a water pressure display assembly (3) via a clamp, and the water pressure display assembly (3) comprises two side panels (32) fixedly connected to the upper end of the clamp, a sensing chamber (33) fixedly connected between the two side panels (32), and two water pipes (31) respectively fixedly connected between the filtering terminal (21) and the side panels (32), wherein the water pipes (31) are fixedly passed through the side panels (32) and communicate with the interior of the sensing chamber (33).

4. A modular farmland water-saving irrigation device according to claim 3, characterized in that: The end of the connecting tube (23) is fixedly passed through the filter end head (21) and extends into the interior thereof; a middle-shaped tube (81) is fixedly connected between the outer end of the connecting tube (23) located inside the filter end head (21) and the inner wall of the filter end head (21); the two ends of the middle-shaped tube (81) are respectively connected to the water guide pipe (31) and the connecting tube (23); the middle-shaped tube (81) is connected to a sealing plate (82) through an elastic rope toward the radial interior of the connecting tube (23); and a water inlet hole (801) is drilled at the outer end of the middle-shaped tube (81) close to the other radial inner wall.

5. A modular farmland water-saving irrigation device according to claim 4, characterized in that: An internal pressure sensor is selectively provided on the radial inner wall of the middle tube (81) away from the sealing plate (82), and the internal pressure sensor is connected to the controller signal. A miniature camera and an alarm are also installed on the filter end (21), and the shooting end of the miniature camera faces the sensing chamber (33). The miniature camera and the alarm are both connected to the controller signal.

6. The modular farmland water-saving irrigation device according to claim 3, characterized in that: A pre-liquid inlet plate (92) is fixedly connected to the top of the sensing bin (33), a liquid-containing vertical bag (91) is fixedly connected between the middle of the lower end of the pre-liquid inlet plate (92) and the bottom end of the sensing bin (33), the liquid-containing vertical bag (91) and the pre-liquid inlet plate (92) are interconnected, and two water guide pipes (31) are respectively located on both sides of the two liquid-containing vertical bags (91), and the two are symmetrical about the center point of the liquid-containing vertical bag (91).

7. A modular farmland water-saving irrigation device according to claim 6, characterized in that: The pre-liquid-intake plate (92) and the upper end of the sensing chamber (33) are both hard and transparent structures, the liquid-containing vertical capsule (91) is an elastic sealing structure, and the interior of the liquid-containing vertical capsule (91) is filled with a colored liquid. When the liquid-containing vertical capsule (91) is in its original state, the liquid level of the colored liquid is not lower than 2 / 3 of the height of the liquid-containing vertical capsule (91).

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