Water-saving drip irrigation device for agricultural planting

Abstract

The application relates to a water-saving drip irrigation device for agricultural planting, belonging to the field of irrigation equipment, which is provided with a plurality of drippers at intervals in the length direction of a branch water supply pipeline, and is respectively provided with a first filter and a second filter at the connection positions of a main water supply pipeline and a water source and the branch water supply pipeline; the second filter comprises a main pipeline, a filter screen, a filter plate and a driving mechanism; the main pipeline is connected in series on the branch water supply pipeline; the main pipeline is provided with an installation bin extending vertically upwards and downwards of the main pipeline; the filter screen is embedded in the filter plate with a smooth surface; the filter plate is provided with a plurality of water-permeable holes perpendicular to the plate surface; the driving mechanism comprises a sliding plate vertically slidingly inserted into the upper part of the main pipeline; when the water pressure in the main pipeline decreases, the sliding plate slides downwards by a set distance and drives the filter plate to move downwards by a stroke. The application can automatically replace the filter screen in the pipeline and fully exert the water-saving performance of the drip irrigation operation.

Description

Technical Field

[0001] This invention relates to the field of irrigation technology, and more specifically to a water-saving drip irrigation device for agricultural planting. Background Technology

[0002] Agricultural water use accounts for a very high proportion of total water consumption, yet its water resource utilization rate is relatively low. Traditional irrigation methods such as flood irrigation and sprinkler irrigation not only waste a large amount of water resources but can also lead to problems such as soil compaction and nutrient loss. Drip irrigation is an advanced agricultural irrigation technology that uses a pipeline system installed in the field to slowly, evenly, and precisely deliver filtered water and nutrient solutions to the soil near the crop roots in the form of fine streams or droplets, directly meeting the irrigation needs of crop growth.

[0003] This method differs from traditional flood irrigation, which involves flooding farmland, and from sprinkler irrigation, which sprays water like rain. Its key feature is that water is concentrated in the crop root zone, reducing water waste during transport and evaporation. This significantly improves water resource utilization and avoids problems such as soil compaction and nutrient loss. It is an important means of achieving water conservation and precision irrigation in agriculture.

[0004] However, a major characteristic of drip irrigation is the extremely small size of its emitters and orifices, making them prone to clogging. Clogging can lead to unstable dripping, uneven irrigation, or even complete failure of the system. Furthermore, as a continuous, slow irrigation method, drip irrigation lasts longer than conventional sprinkler or flood irrigation. Operators cannot constantly monitor the vast fields to check the filters. Moreover, the filters in existing drip irrigation systems are essentially no different from those in general fluid delivery pipelines, thus failing to automatically resolve temporary filter clogging. This disrupts the drip irrigation process, preventing the emitters from dripping and hindering its water-saving capabilities.

[0005] In addition, some drip irrigation systems are equipped with many pressure sensors. Once a low pressure is detected in a certain pipeline, the system will automatically increase the pump flow rate or outlet pressure at the water source in order to maintain normal drip irrigation operation. This will speed up the drip irrigation in the local pipeline, turning it from drip irrigation to sprinkler irrigation. However, the blocked pipeline will remain blocked and unable to drip, resulting in water waste in the entire drip irrigation process and failing to fully realize its water-saving performance. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a water-saving drip irrigation device for agricultural planting, so as to solve the problem in the prior art that the drip irrigation device cannot be dripped normally due to the filter blockage in the pipeline system, and thus cannot give full play to the water-saving advantages of drip irrigation.

[0007] This invention is achieved through the following technical solution:

[0008] A water-saving drip irrigation device for agricultural planting includes a main water supply pipe connected to a water source and several branch water supply pipes connected to the main water supply pipe. Several drippers are spaced apart along the length of each branch water supply pipe. A first filter and a second filter are respectively installed at the connection points between the main water supply pipe and the water source and the branch water supply pipes. The second filter includes a main pipe, a filter screen, a filter plate, and a driving mechanism for sliding the filter plate. The main pipe is connected in series with the branch water supply pipes. The main pipe has an installation chamber located at its cross-section, extending vertically upwards and downwards from the main pipe. The filter screen is embedded in a smooth-surfaced filter plate, which has several water-permeable holes perpendicular to its surface. The driving mechanism includes a sliding plate, which is vertically slidably inserted into the upper part of the main pipe. When the water pressure in the main pipe decreases, the sliding plate slides downwards a predetermined distance, driving the filter plate downwards by a stroke, the stroke being not less than the inner diameter of the main pipe.

[0009] Furthermore, a water pressure sensor is installed on the branch water supply pipe at the inlet end of the main water supply pipe. The water pressure sensor is located at the outlet end of the switch valve between the main water supply pipe and the branch water supply pipe. The drive mechanism can only work when the water pressure value detected by the water pressure sensor is within the set range.

[0010] Furthermore, the filter plate is supported and installed in the mounting chamber by a support spring.

[0011] Furthermore, the installation chamber is a rectangular cavity, and the filter plate is a rectangular plate.

[0012] Furthermore, the drive mechanism also includes a body fixed to the main pipe. From top to bottom, the body contains an upper magnetic ring, a middle magnetic ring, and a lower magnetic ring. A connecting rod is fixed to the center of the middle magnetic ring, and a conductive plate is fixed on the connecting rod. Below the conductive plate is a conductive contact plate fixed inside the body. The middle magnetic ring repels the upper and lower magnetic rings, so that when the water pressure in the branch water supply pipe is within a set range, the middle magnetic ring remains within a set area inside the body. In this area, the conductive plate on the connecting rod never contacts the contact plate. However, when the water pressure in the branch water supply pipe is below the set range, the conductive plate and the contact plate remain in contact, thereby activating a control circuit. This control circuit enables a drive element to drive the filter plate to move downwards within the mounting chamber by a set stroke.

[0013] Furthermore, the driving element is a miniature electric actuator, the output end of which is connected to the top of the filter plate. When the control circuit is turned on, the miniature electric actuator extends downward by a set stroke.

[0014] Furthermore, the driving element is a hydraulic cylinder, which is fixedly installed on the top surface of the main body. The hydraulic oil output end of the hydraulic cylinder is connected to the top of the mounting chamber, so that when the control circuit is turned on, the piston in the hydraulic cylinder pushes out a set amount of hydraulic oil to squeeze the filter plate down a set stroke.

[0015] Furthermore, the slide plate is hollow inside, with a downward-convex semi-circular surface at the bottom and the middle magnetic ring fixed at the top. A connecting ring is fixed at the top of the upper magnetic ring, and several studs that do not detach from it are rotatably installed inside the top of the connecting ring. All studs are arranged in an array around the central axis of the upper magnetic ring. A cylindrical drive gear is coaxially fixed at the top of each stud. All drive gears mesh with an internal gear ring rotatably installed on their outer side. The internal gear ring is coaxially fixed inside an adjustment knob. The adjustment knob is installed in the body with rotation in place, and when the adjustment knob is rotated, all studs move axially synchronously.

[0016] Furthermore, an end cap is screwed into the top of the main body in a threaded fit, and the end cap presses and fixes the top of the adjustment knob; a threaded cylinder is fixed to the bottom of the contact plate, and the threaded cylinder and the main body are threadedly fitted, and both are provided with a compression spring in the axial direction.

[0017] The beneficial effects of this invention are as follows:

[0018] This water-saving drip irrigation device for agricultural planting, in addition to the first filter installed on the main water supply pipe, has a second filter installed at each branch water supply pipe. This specially designed second filter can automatically replace the actual working part of the filter screen on the branch water supply pipe. Therefore, according to the blockage situation, the filter screen can be slid into the branch water supply pipe one by one to automatically solve the blockage problem, thereby maintaining the filtration performance and keeping the water pressure in the branch water supply pipe within the set range, thus ensuring that the dripper can drip water normally and achieve the ideal drip irrigation effect.

[0019] In addition, it can prevent the water supply system from mistakenly pressurizing or increasing the flow rate of the main water supply pipe when the filter on an individual branch water supply pipe is clogged, thus avoiding unnecessary ineffective delivery of irrigation water and fully utilizing the water-saving performance of drip irrigation.

[0020] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0021] Figure 1 This is a partial structural diagram of the present invention;

[0022] Figure 2 This is a partial cross-sectional view of the second filter of the present invention;

[0023] Figure 3 This is a partial structural schematic diagram of the drive mechanism of the present invention;

[0024] Figure 4 for Figure 2 Enlarged structural diagram at point A;

[0025] Figure 5 A top view of the transmission structure between the adjustment knob and the drive gear;

[0026] Figure 6 This is a schematic diagram of the piston movement inside the hydraulic cylinder;

[0027] Figure 7 This is a diagram showing the internal structure of the installation compartment located on the upper side of the main pipeline.

[0028] In the diagram: 1. Main water supply pipe; 2. Branch water supply pipe; 3. Main body pipe; 4. Installation chamber; 5. Body; 6. Slide plate; 7. Filter plate; 701. Water permeable hole; 8. Filter screen; 9. Oil cylinder; 10. Middle magnetic ring; 11. Lower magnetic ring; 12. Upper magnetic ring; 13. Connecting ring; 14. Stud; 15. Drive gear; 16. Internal gear ring; 17. Adjustment knob; 18. Conductive plate; 19. Contact plate; 20. Threaded cylinder; 21. End cap; 24. Piston; 25. Support spring; 26. Connecting rod; 27. Sealing plug; 28. Guide block; 29. ​​Vertical guide groove. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] Please see Figure 1-2This invention provides a technical solution: a water-saving drip irrigation device for agricultural planting, mainly including a main water supply pipe 1 connected to a water source, and several branch water supply pipes 2 connected to the main water supply pipe 1. Several drippers are spaced along the length of each branch water supply pipe 2 for drip irrigation of crops. At the connection points of the main water supply pipe 1 with the water source and the branch water supply pipes 2, a first filter and a second filter are respectively provided. The first filter performs a primary filtration of the water entering the main water supply pipe 1, while the second filter performs a secondary filtration of the water entering a specific branch water supply pipe 2, preventing impurities such as particulate matter not filtered out by the first filter from entering the branch water supply pipe 2 and affecting the drip irrigation operation. The difference is that in this embodiment, as... Figure 3 As shown, its second filter includes a main pipe 3, a filter screen 8, a filter plate 7, and a drive mechanism for sliding the filter plate 7. The main pipe 3 is connected in series with the branch water supply pipe 2, primarily for installing the second filter on the corresponding pipe. Specifically, the main pipe 3 has a mounting chamber 4 located at its cross-section, which extends vertically above and below the main pipe 3. Furthermore, the filter screen 8 is embedded in the smooth-surfaced filter plate 7, such as... Figure 4 The filter plate 7 has several water-permeable holes 701 perpendicular to its surface. Water enters the filter screen 8 through the water-permeable holes 701 for filtration. The filter plate 7 not only has a filtration function but also allows the filter screen 8 to slide vertically within the mounting chamber 4. In this embodiment, as... Figure 3 The drive mechanism includes a slide plate 6, which is vertically slidably inserted into the upper part of the main pipe 3. The bottom end can extend into the main pipe 3 and float up and down with the water pressure. When the water pressure in the main pipe 3 decreases, the slide plate 6 slides down a set very small distance, which can be called the trigger distance, and thus drives the filter plate 7 to move down a stroke, the stroke being no less than the inner diameter of the main pipe 3.

[0033] In this embodiment, a water pressure sensor (not shown in the figure) is also installed on the branch water supply pipe 2 at the inlet end of the main water supply pipe 3. The water pressure sensor is located at the outlet end of the switch valve between the main water supply pipe 1 and the branch water supply pipe 2 to detect whether the water pressure in the main water supply pipe 1 is normal. This prevents the water pressure flowing into the branch water supply pipe 2 from dropping due to insufficient water flow in the main water supply pipe, which could cause the filter plate 7 to move down erroneously. This is mainly to address the situation where the water pressure control entering the main water supply pipe 1 is unstable. When the water pressure value detected by the water pressure sensor is within the set range, the drive mechanism can work. That is, when the slide plate 6 moves down a corresponding distance, it indicates that the filter screen 8 is likely blocked, resulting in less water flowing in. This automatically moves the filter plate 7 and filter screen 8 down, installing the unused part of the filter screen 8 in the main pipe 3 for normal filtration, while the previously working part is stored in the lower part of the installation chamber 4, realizing the function of automatically updating the filter screen 8. This avoids the normal operation of drip irrigation due to filter blockage and makes fuller use of the water-saving effect of drip irrigation. Figure 2 As shown, to facilitate the installation of the filter screen 8, the filter plate 7 is supported and installed in the mounting chamber 4 by a support spring 25. During use, the support spring 25 is further compressed step by step. In specific manufacturing, the mounting chamber 4 is a rectangular cavity, and the filter plate 7 is a rectangular plate to better replace the part where the filter screen 8 is installed.

[0034] In this embodiment, as Figure 3As shown, its driving mechanism also includes a body 5 fixed to the main pipe 3. Inside this body 5, from top to bottom, are arranged an upper magnetic ring 12, a middle magnetic ring 10, and a lower magnetic ring 11. A connecting rod is fixed to the center of the middle magnetic ring 10, and a conductive plate 18 is fixed to the connecting rod. Below the conductive plate 18 is a conductive contact plate 19 fixed inside the body 5. In the above structural design, the middle magnetic ring 10 needs to repel both the upper and lower magnetic rings 12 and 11. That is, the middle magnetic ring 10 is pushed by the upper and lower magnetic rings, and combined with the upward water pressure in the water supply pipe, it is kept within a certain area. In other words, the middle magnetic ring simultaneously receives magnetic repulsion from both directions, as well as the upward water pressure, maintaining it within a relatively stable area inside the body 5. When the water pressure decreases, the middle magnetic ring 10 moves downward, and subsequently, the sliding plate 6 moves downward. The reason why springs are not used to replace the upper magnetic ring 12 and lower magnetic ring 11 is that the lifespan of the springs affects the initial position of the middle magnetic ring 10 due to changes in elastic deformation. When the central magnetic ring 10 is within a set range, it means the water pressure in the branch water supply pipe 2 is within a set range. Within this range, the conductive plate 18 on the connecting rod never contacts the contact plate 19. However, when the water pressure in the branch water supply pipe 2 is below the set range, the sliding plate 6 moves downwards, meaning the central magnetic ring 10 moves downwards. This causes the conductive plate 18 to contact the contact plate 19, thus activating a control circuit. This control circuit activates a drive element to move the filter plate 7 downwards within the mounting chamber 4 by a set stroke. For example, if the inner diameter of the branch water supply pipe 2 is 25mm, the filter plate 7 and filter screen 8 will move downwards by at least 25mm, replacing the original filtering portion of the filter screen 8. In the above design, the contact plate 19 and the conductive plate 18 are essentially two contacts in a circuit. Once they contact, the corresponding circuit closes, driving the drive element to move and controlling the movement of the filter screen 8. For example, in practice, this driving element is a miniature electric actuator. The output end of the miniature electric actuator is connected to the top of the filter plate 7. The aforementioned control circuit is the starting circuit for the miniature electric actuator. When the control circuit is turned on, the miniature electric actuator extends downward by a set stroke, for example, extending downward by 25mm. To achieve better sliding sealing, a corresponding sealing strip can also be provided on the surface of the filter plate 7 to press against the inner wall of the mounting chamber 4, forming a dynamic seal.

[0035] In addition to the above implementation structure, such as Figure 6 Alternatively, the driving element can be a hydraulic cylinder 9. The aforementioned control circuit controls the movement of the piston 24 within the hydraulic cylinder 9, thereby pushing the hydraulic oil within the cylinder 9 into the mounting chamber 4. Specifically, the hydraulic cylinder 9 is fixedly mounted on the top surface of the main body 5. The hydraulic oil output end of the cylinder 9 is connected to the top of the mounting chamber 4 to input hydraulic oil into the chamber 4. When the control circuit is activated, the piston 24 within the cylinder 9 pushes out a set amount of hydraulic oil to compress the filter plate 7 and move it downwards by a set stroke, automatically replacing the working part of the filter screen 8. In actual manufacturing, if... Figure 7 A vertically sliding sealing plug 27 can be installed on top of the filter plate 7, inside the installation chamber 4, to completely isolate the hydraulic oil from the filter plate 7. The movement of the sealing plug 27 moves the filter plate 7. Each side of the sealing plug 27 has a guide block 28, which is slidably connected to a vertical guide groove 29 in the side wall of the installation chamber 4, so that the sealing plug 27 can maintain a seal against the hydraulic oil when the filter screen 8 is removed. One side of the installation chamber 4 can be designed as a removable cover, so that the filter plate 7 and filter screen 8 can be removed and taken out during maintenance.

[0036] In this embodiment, as Figure 3 The slide plate 6 is hollow and made of lightweight material. It has a downward-convex semi-circular surface at its bottom to accommodate water pressure and allow it to move up and down. A central magnetic ring 10 is fixed at the top. In practice, it is advisable to keep the slide plate 6 away from the filter screen 8, or, if they are close enough, to add a shroud. For the installation of the upper magnetic ring 12, a connecting ring 13 can be fixed to its top. The connecting ring 13 is annular, and several studs 14 are rotatably mounted within its top, allowing them to rotate within the end face of the connecting ring 13. Figure 5 All studs 14 are arranged in an array around the central axis of the upper magnetic ring 12. A cylindrical drive gear 15 is coaxially fixed to the top of each stud 14. All drive gears 15 mesh with an internal gear ring 16 rotatably mounted on their outer side. The internal gear ring 16 is coaxially fixed in an adjustment knob 17. The adjustment knob 17 is installed in the body 5 with its own rotation in place. Thus, when the adjustment knob 17 is rotated, all studs 14 rotate. Through the threaded engagement with the body 5, they can move axially synchronously. During the movement, because of the threaded engagement, they can remain relatively stable and will not move arbitrarily, thus not affecting the real-time position of the upper magnetic ring 12. The main purpose of the above design is to adjust the installation position of the upper magnetic ring 12. By synchronously driving multiple studs 14, the upper magnetic ring 12 can be moved vertically while being installed horizontally, and adjusted to the corresponding installation height range. At the same time, it can ensure that the middle magnetic ring 10 can be evenly stressed, avoiding excessive force on one side, i.e., one side being too close to the upper magnetic ring 12, resulting in greater repulsive force, which would cause the middle magnetic ring 10 to tilt, making it difficult to slide within the body 5 and more likely to get stuck in the body 5 when sliding up and down.

[0037] In this embodiment, an end cap 21 is screwed into the top of the main body 5 with a threaded fit. The end cap 21 presses and fixes the top of the adjustment knob 17, thereby fixing the height position of the upper magnetic ring 12 and completely preventing the position of the upper magnetic ring 12 from changing when the adjustment knob 17 is accidentally rotated. In addition, in order to adjust the value of the trigger distance to suit specific working scenarios, a threaded cylinder 20 is fixed at the bottom of the contact plate 19. The threaded cylinder 20 is threadedly fitted with the main body 5, and both are provided with a compression spring in the axial direction. This compression spring is to maintain the stability of the threaded cylinder 20 during the adjustment and installation process. The threaded cylinder 20 can change the installation position height of the contact plate 19, thereby changing the stroke when the conductive sheet 18 contacts and conducts with the contact plate 19. This corresponds to the selection of the degree of clogging when replacing the filter part of the filter screen 8 and the selection of the amount of water pressure change, improving versatility.

[0038] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A water-saving drip irrigation device for agricultural planting, comprising a main water supply pipe (1) connected to a water source and a plurality of branch water supply pipes (2) connected to the main water supply pipe (1), wherein a plurality of drippers are spaced apart along the length of the branch water supply pipes (2), and a first filter and a second filter are respectively provided at the connection points between the main water supply pipe (1) and the water source and the branch water supply pipes (2), characterized in that: The second filter includes a main pipe (3), a filter screen (8), a filter plate (7), and a drive mechanism for driving the filter plate (7) to slide. The main pipe (3) is connected in series with the branch water supply pipe (2). The main pipe (3) has an installation chamber (4) located at its cross-section. The installation chamber (4) extends vertically above and below the main pipe (3). The filter screen (8) is embedded in the smooth filter plate (7). The filter plate (7) has a plurality of water-permeable holes (701) perpendicular to the plate surface. The driving mechanism includes a slide plate (6), which is vertically slidably inserted into the upper part of the main pipe (3). When the water pressure in the main pipe (3) decreases, the slide plate (6) slides downward a set distance and drives the filter plate (7) to move downward a stroke. The stroke is not less than the inner diameter of the main pipe (3). A water pressure sensor is provided on the branch water supply pipe (2) at the inlet end of the main water supply pipe (3). The water pressure sensor is located at the outlet end of the switch valve between the main water supply pipe (1) and the branch water supply pipe (2). The drive mechanism can only work when the water pressure value detected by the water pressure sensor is within the set range. The driving mechanism also includes a body (5) fixed to the main pipe (3). Inside the body (5), from top to bottom, are arranged an upper magnetic ring (12), a middle magnetic ring (10), and a lower magnetic ring (11). A connecting rod is fixed to the center of the middle magnetic ring (10), and a conductive plate (18) is fixed on the connecting rod. Below the conductive plate (18) is a conductive contact plate (19) fixed inside the body (5). The middle magnetic ring (10) repels the upper magnetic ring (12) and the lower magnetic ring (11) to prevent the branch water supply pipe ( 2) When the water pressure in the middle is within the set range, the middle magnetic ring (10) stays in the set area in the body (5). In this area, the conductive plate (18) on the connecting rod never contacts the contact plate (19). However, when the water pressure in the branch water supply pipe (2) is below the set range, the conductive plate (18) and the contact plate (19) remain in contact, thereby turning on a control circuit. This control circuit can cause a drive element to drive the filter plate (7) to move downwards within the mounting chamber (4) by a set stroke.

2. The water-saving drip irrigation device for agricultural planting according to claim 1, characterized in that: The filter plate (7) is supported and installed in the mounting chamber (4) by a support spring (25).

3. The water-saving drip irrigation device for agricultural planting according to claim 1, characterized in that: The installation chamber (4) is a rectangular cavity, and the filter plate (7) is a rectangular plate. A sealing plug (27) is installed on the top of the filter plate (7) and is vertically slidably installed in the installation chamber (4) to completely separate the hydraulic oil from the filter plate (7). Each side of the sealing plug (27) has a guide block (28), and the guide block (28) is slidably connected to the vertical guide groove (29) in the side wall of the installation chamber (4).

4. The water-saving drip irrigation device for agricultural planting according to claim 1, characterized in that: The driving element is a miniature electric actuator. The output end of the miniature electric actuator is connected to the top of the filter plate (7). When the control circuit is turned on, the miniature electric actuator extends downward by a set stroke.

5. The water-saving drip irrigation device for agricultural planting according to claim 1, characterized in that: The driving element is a hydraulic cylinder (9), which is fixedly installed on the top surface of the body (5). The hydraulic oil output end of the hydraulic cylinder (9) is connected to the top of the installation chamber (4) so ​​that when the control circuit is turned on, the piston (24) in the hydraulic cylinder (9) pushes out a set amount of hydraulic oil to squeeze the filter plate (7) to move down a set stroke.

6. The water-saving drip irrigation device for agricultural planting according to claim 1, characterized in that: The slide plate (6) is hollow inside, with a downward-convex semi-circular surface at the bottom and the middle magnetic ring (10) fixed at the top. The upper magnetic ring (12) has a connecting ring (13) fixed at the top. Several studs (14) that do not detach from the connecting ring (13) are rotatably installed inside the top of the connecting ring (13). All studs (14) are arranged in an array around the central axis of the upper magnetic ring (12). A cylindrical drive gear (15) is coaxially fixed at the top of each stud (14). All drive gears (15) mesh with an internal gear ring (16) rotatably installed on their outer side. The internal gear ring (16) is coaxially fixed inside an adjustment knob (17). The adjustment knob (17) is installed in the body (5) with rotation in place. When the adjustment knob (17) is rotated, all studs (14) move axially synchronously.

7. The water-saving drip irrigation device for agricultural planting according to claim 6, characterized in that: The top of the body (5) is screwed with an end cap (21) which presses and fixes the top of the adjustment knob (17); the bottom of the contact plate (19) is fixed with a threaded cylinder (20), which is threaded with the body (5), and both are provided with a compression spring in the axial direction.

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