Water-saving drip irrigation device for agricultural planting

Abstract

The invention relates to a water-saving drip irrigation device for agricultural planting, and belongs to the field of irrigation equipment. A plurality of drippers are arranged in the length direction of a branch water supply pipeline at intervals, and a first filter and a second filter are arranged at the joint of a main water supply pipeline and a water source and the joint of the main water supply pipeline and the branch water supply pipeline respectively; the second filter comprises a main body pipeline, a filter screen, a filter plate and a driving mechanism, the main body pipeline is connected to the branch water supply pipeline in series, a mounting bin is arranged on the main body pipeline, and the mounting bin vertically extends towards the upper portion and the lower portion of the main body pipeline; the filter screen is embedded in a filter plate with a smooth surface, and the filter plate is provided with a plurality of water permeable holes perpendicular to the plate surface; the driving mechanism comprises a sliding plate, the sliding plate is vertically inserted in the upper part in the main body pipeline in a sliding manner, and when the water pressure in the main body pipeline is reduced, the sliding plate slides downwards by a set distance and drives the filter plate to move downwards by a stroke. The filter screen in the pipeline can be automatically replaced, and the water-saving performance of drip irrigation operation is fully exerted.

Description

Technical Field

[0001] The present invention relates to the field of irrigation technology, in particular to a water-saving drip irrigation device for agricultural planting. Background Art

[0002] Agricultural water consumption accounts for a significant portion of total water consumption, yet water resource utilization is relatively low. Traditional irrigation methods, such as flooding and sprinkler irrigation, not only waste significant amounts of water but can also lead to soil compaction and nutrient loss. Drip irrigation is an advanced agricultural irrigation technology that uses pipes installed in the field to deliver filtered water and nutrient solution to the soil near the roots of crops in the form of small streams or droplets. This method delivers the water needed for crop growth directly, evenly, and precisely.

[0003] This method is different from traditional flooding, which floods farmland, and is not like sprinkler irrigation, which sprays like rain. Its outstanding feature is that water is concentrated in the crop root area, reducing water waste during transportation and evaporation. It can significantly improve water resource utilization, while avoiding problems such as soil compaction and nutrient loss. It is an important means to achieve agricultural water conservation and precision irrigation.

[0004] However, a major characteristic of drip irrigation is that the drippers or drip holes are very small and easily clogged. Once clogged, this can lead to unstable dripping, uneven irrigation, or even complete failure of drip irrigation. Furthermore, drip irrigation, as a continuous, slow irrigation method, lasts longer than conventional sprinkler and flood irrigation. It is impossible for workers to constantly monitor filters throughout the vast farmland to check whether they are functioning properly. Furthermore, the filters in existing drip irrigation systems are essentially the same as those in conventional fluid delivery pipelines, making it impossible to automatically resolve temporary filter blockages. This hinders drip irrigation operations, prevents drippers from dripping, and prevents them from fully realizing their water-saving potential.

[0005] In addition, some drip irrigation pipeline systems are installed with many pressure sensors. Once a pipeline is detected to be under-pressure, in order to maintain normal drip irrigation operations, the system will automatically increase the pump water flow or water pressure at the water source, thereby speeding up the drip irrigation speed in the local pipeline, changing from drip irrigation to sprinkler irrigation, while the blocked pipeline is still blocked and cannot drip irrigation, resulting in water waste in the entire drip irrigation process and failing to fully exert 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 to solve the problem in the prior art that the filter in the drip irrigation device pipeline system is clogged, resulting in normal drip irrigation and the inability to fully utilize the water-saving advantages of drip irrigation.

[0007] The present invention is achieved through the following technical solutions:

[0008] A water-saving drip irrigation device for agricultural planting comprises a main water supply pipe connected to a water source and several branch water supply pipes connected to the main water supply pipe, wherein the branch water supply pipes are provided with several drippers at intervals in the length direction, and the main water supply pipe is provided with a first filter and a second filter at the connection between the water source and the branch water supply pipe respectively, and the second filter comprises a main pipe, a filter screen, a filter plate and a driving mechanism for driving the filter plate to slide, wherein the main pipe is connected in series to the branch water supply pipe, and the main pipe has an installation bin located at its cross section, and the installation bin extends vertically above and below the main pipe respectively; the filter screen is embedded in the filter plate with a smooth surface, and the filter plate has several water-permeable holes perpendicular to the plate surface; the driving mechanism comprises a slide plate, which is vertically slidably inserted into the upper part of the main pipe, and when the water pressure in the main pipe becomes smaller, the slide plate slides downward a set distance and drives the filter plate to move downward a stroke, and the stroke is not less than the inner diameter of the main pipe.

[0009] Furthermore, a water pressure sensor is provided on the branch water supply pipe at the inlet end of the main 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. When the water pressure value detected by the water pressure sensor is within the set range, the driving mechanism can work.

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

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

[0012] Furthermore, the driving mechanism also includes a main body fixed on the main pipe, and an upper magnetic ring, a middle magnetic ring, and a lower magnetic ring are arranged in the main body from top to bottom. A connecting rod is fixed in the center of the middle magnetic ring, a conductive sheet is fixed on the connecting rod, and a conductive contact disk fixed inside the main body is provided below the conductive sheet; the middle magnetic ring and the upper magnetic ring and the lower magnetic ring all repel each other, so that when the water pressure in the branch water pipe is within a set range, the middle magnetic ring stays in a set area in the main body, and in this area, the conductive sheet on the connecting rod does not contact the contact disk at all times, but when the water pressure in the branch water pipe is below the set range, the conductive sheet and the contact disk remain in contact, thereby connecting a control circuit, and the connection of the control circuit enables a driving element to drive the filter plate to move downward within the installation bin to a set stroke.

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

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

[0015] Furthermore, the interior of the skateboard is hollow, and the bottom end has a semicircular surface protruding downward, and the middle magnetic ring is fixed to the top; the top of the upper magnetic ring is fixed to a connecting ring, and a number of studs that do not detach from the connecting ring are rotatably installed in the top of the connecting ring. All the studs are arranged in an array around the central axis of the upper magnetic ring, and a cylindrical driving gear is coaxially fixed to the top of each stud. All the driving gears are engaged with an internal gear ring rotatably installed on the outside thereof, and the internal gear ring is coaxially fixed in an adjusting knob. The adjusting knob is installed in the body in an in-situ rotating manner, and when the adjusting knob is rotated, all the studs move axially synchronously.

[0016] Furthermore, an end cover is screwed into the top of the main body in a threaded fit, and the end cover presses and fixes the top of the adjusting knob; a threaded barrel is fixed to the bottom of the contact disk, and the threaded barrel and the main body are threadedly fitted, and the two are axially provided with a tightening spring in a compressed state.

[0017] Furthermore, a conductive conduction block is embedded in the inner top of the end cover; a conductive rod that can conduct electricity is fixed to the top of the connecting rod, and the conductive rod is fixed as a whole with the contact plate, and when the water pressure in the branch water pipe is within a set range, the conductive rod maintains contact with the conduction block above it, and makes a buzzer alarm in a circuit where the conduction block is located in a disconnected state, and a buzzer alarm is issued when the contact time between the conductive rod and the conduction block reaches a set time.

[0018] The beneficial effects of the present invention are:

[0019] This water-saving drip irrigation device for agricultural planting is equipped with a first filter on the main water supply pipe for filtering, and a second filter is installed at each branch water supply pipe. This special second filter can automatically replace the actual working part of the filter mesh on the branch water supply pipe. Therefore, the filter mesh can be slid into the branch water supply pipe one by one according to the blockage situation, automatically solving the blockage problem, thereby maintaining the filtering performance and keeping the water pressure in the branch water supply pipe within the set range, thereby ensuring that the dripper can drip normally and achieve the ideal drip irrigation effect.

[0020] In addition, it can also avoid the situation where the water supply system mistakenly pressurizes or increases the flow rate toward the main water supply pipe when the filter on an individual branch water supply pipe is clogged, avoids unnecessary and ineffective delivery of irrigation water, and gives full play to the water-saving performance brought by drip irrigation operations.

[0021] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a partial structural diagram of the present invention;

[0023] Figure 2 is a partial cross-sectional view of the second filter of the present invention;

[0024] Figure 3 It is a partial structural diagram of the driving mechanism of the present invention;

[0025] Figure 4 for Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 5 A top view of the transmission structure of the adjustment knob and the drive gear;

[0027] Figure 6 Schematic diagram of the piston movement in the cylinder;

[0028] Figure 7 This is an internal structure diagram of the installation chamber located on the upper side of the main pipe.

[0029] In the figure: main water supply pipe 1, branch water supply pipe 2, main pipe 3, installation chamber 4, body 5, slide plate 6, filter plate 7, water permeable hole 701, filter screen 8, oil cylinder 9, middle magnetic ring 10, lower magnetic ring 11, upper magnetic ring 12, connecting ring 13, stud 14, drive gear 15, inner ring 16, adjusting knob 17, conductive sheet 18, contact plate 19, threaded barrel 20, end cover 21, conduction block 22, conductive rod 23, piston 24, support spring 25, connecting rod 26, sealing plug 27, guide block 28, vertical guide groove 29. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0033] See also Figure 1-2 , the present invention provides a technical solution: a water-saving drip irrigation device for agricultural planting, mainly 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, and a plurality of drippers are arranged at intervals along the length direction of the branch water supply pipe 2 for drip irrigation of crops. A first filter and a second filter are respectively provided at the connection between the main water supply pipe 1 and the water source and the branch water supply pipe 2. The first filter will filter the water entering the main water supply pipe 1 once, and the second filter will filter the water entering a specific branch water supply pipe 2 again to prevent impurities such as particulate matter that are 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, if Figure 3 As shown, 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 to the branch water pipe 2 and is mainly used to install the second filter on the corresponding pipe. Specifically, the main pipe 3 has a mounting compartment 4 located at its cross section. The mounting compartment 4 extends vertically above and below the main pipe 3. In addition, the filter screen 8 is embedded in the smooth filter plate 7, as shown in FIG. Figure 4 The filter plate 7 has a plurality of water-permeable holes 701 perpendicular to the plate surface. Water enters the filter screen 8 through the water-permeable holes 701 for filtration. The filter plate 7 not only has a certain filtering effect, but also allows the filter screen 8 to slide vertically in the installation chamber 4. In this embodiment, Figure 3 This driving mechanism includes a slide plate 6, which is vertically slidably inserted into the upper part of the main pipe 3, and the bottom end can be inserted into the main pipe 3 and float up and down with the size of the water pressure. When the water pressure in the main pipe 3 becomes smaller, the slide plate 6 slides downward a set very small distance, which can be called the trigger distance, and thereby drives the filter plate 7 to move downward a stroke, which is not less than the inner diameter of the main pipe 3.

[0034] In this embodiment, a water pressure sensor (not shown in the figure) is also provided on the branch water supply pipe 2 at the inlet end of the main 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, so as to avoid the situation where the water pressure flowing into the branch water supply pipe 2 drops due to insufficient water flow in the main water supply pipe, causing the filter plate 7 to move downward by mistake. This is mainly for 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 driving mechanism can work, that is, when the slide plate 6 moves down a corresponding distance, it means that the filter screen 8 is likely to be clogged, resulting in less water flowing in, thereby automatically moving the filter plate 7 and the filter screen 8 downward, and installing the unused part of the filter screen 8 in the main pipe 3 for normal filtering, while the original working part enters the lower part of the installation chamber 4 for storage, so as to realize the function of automatically updating the filter screen 8, avoiding the normal drip irrigation caused by filter blockage, and giving full play to the water-saving effect of the drip irrigation operation. Figure 2 As shown, to facilitate installation of the filter screen 8, the filter plate 7 is supported and installed in the installation chamber 4 by a support spring 25. During use, the support spring 25 is further compressed. In the specific manufacturing process, the installation chamber 4 is a rectangular cavity, and the filter plate 7 is a rectangular plate, so as to better replace the location of the filter screen 8.

[0035] In this embodiment, Figure 3As shown, the drive mechanism also includes a body 5 fixed to the main pipe 3. This body 5 is provided with an upper magnetic ring 12, a middle magnetic ring 10, and a lower magnetic ring 11, arranged in order from top to bottom. 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, a conductive contact plate 19 is provided inside the body. In the above structural design, it is also necessary to ensure that the middle magnetic ring 10, the upper magnetic ring 12, and the lower magnetic ring 11 all repel each other. That is, the middle magnetic ring 10 is pushed by the upper and lower magnetic rings and the upward water pressure in the branch water pipe to remain in a certain area. That is, the middle magnetic ring is simultaneously subjected to magnetic repulsion in both the upper and lower directions and the upward water pressure, maintaining it in a relatively stable area within the body 5. When the water pressure decreases, the middle magnetic ring 10 will move downward, and then the slide 6 will move downward. The reason why springs are not used here to replace the upper and lower magnetic rings 12 and 11 is because the spring life is affected and the elastic deformation changes, which will affect the initial position of the middle magnetic ring 10. The middle magnetic ring 10 is within the set area, which means that the water pressure in the branch water pipe 2 is within the set range. In this area, the conductive sheet 18 on the connecting rod is never in contact with the contact plate 19. However, when the water pressure in the branch water pipe 2 is below the set range, the slide 6 will move down, that is, the middle magnetic ring 10 will move down, and the conductive sheet 18 and the contact plate 19 will remain in contact, thereby connecting a control circuit. The connection of the control circuit enables a driving element to drive the filter plate 7 to move downward within the installation chamber 4 to a set stroke. For example, if the inner diameter of the branch water pipe 2 is 25 mm, the filter plate 7 and the filter screen 8 will move down at least 25 mm to replace the original filtering position of the filter screen 8. The contact plate 19 and the conductive sheet 18 in the above design are actually two contacts in a circuit. Once in contact, the corresponding circuit is closed, which drives the driving element to move and controls the filter screen 8 to move. For example, in practice, the driving element is a miniature electric push rod, the output end of which is connected to the top of the filter plate 7. The control circuit described above is the activation circuit of the miniature push rod. When the control circuit is turned on, the miniature push rod extends downward by a set stroke, for example, 25 mm. To provide a better sliding seal, 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 to form a dynamic seal.

[0036] In addition to the above implementation structure, Figure 6 , this driving element can also be selected as an oil cylinder 9, and the above-mentioned control circuit is used to control the movement of the piston 24 in the oil cylinder 9, and then push the hydraulic oil in the oil cylinder 9 into the above-mentioned installation chamber 4. Specifically, this oil cylinder 9 is fixedly installed on the top surface of the main body, and the hydraulic oil output end of the oil cylinder 9 is connected to the top of the installation chamber 4 to input hydraulic oil into the installation chamber 4. When the control circuit is turned on, the piston 24 in the oil cylinder 9 pushes out a set amount of hydraulic oil to squeeze the filter plate 7 down a set stroke, and automatically replace the working part of the filter screen 8. In actual production, if Figure 7 A sealing plug 27 can be installed on top of the filter plate 7 and slides vertically within the installation chamber 4 to completely isolate the hydraulic oil from the filter plate 7. The movement of the sealing plug 27 drives the filter plate 7 to move. A guide block 28 is provided on each side of the sealing plug 27. The guide blocks 28 slide into vertical guide grooves 29 in the side walls of the installation chamber 4. This allows the sealing plug 27 to 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 to facilitate the removal and disassembly of the filter plate 7 and filter screen 8 for maintenance.

[0037] In this embodiment, Figure 3 , the inside of the slide plate 6 is hollow, and the slide plate 6 is made of lightweight material. The bottom end of the slide plate 6 has a semicircular surface protruding downward to adapt to the water pressure and move up and down. The top end is fixed with a middle magnetic ring 10. In practice, it is better to keep the slide plate 6 away from the filter screen 8, or add a fairing when the distance between the two is close. As for the installation of the upper magnetic ring 12, a connecting ring 13 can be fixed on the top end of the upper magnetic ring 12. The connecting ring 13 is annular, and a number of studs 14 that do not separate from it are rotatably installed in the top end of the connecting ring 13, that is, the studs 14 can rotate in 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, and a cylindrical driving gear 15 is coaxially fixed to the top of each stud 14. All driving gears 15 are engaged with an inner ring gear 16 rotatably mounted on the outside thereof. The inner ring gear 16 is coaxially fixed in an adjusting knob 17, and the adjusting knob 17 is installed in the body 5 in situ and rotates. Therefore, when the adjusting knob 17 is rotated, all studs 14 rotate and can move axially synchronously through the threaded cooperation with the body 5. In the process of movement, due to the threaded cooperation, it can remain relatively stable and will not move at will, thereby not affecting the real-time position of the upper magnetic ring 12. In the above design, the main purpose is to adjust the installation position of the upper magnetic ring 12. Through the synchronous driving of multiple studs 14, the upper magnetic ring 12 can be moved vertically under the premise of horizontal installation, 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, that is, one side is too close to the upper magnetic ring 12 and has a greater repulsive force, causing the middle magnetic ring 10 to tilt, which is not conducive to sliding in the main body 5 and is more likely to get stuck in the main body 5 when sliding up and down.

[0038] In this embodiment, an end cap 21 is threadedly screwed into the top of the body 5. The end cap 21 presses and secures 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 being changed when the adjustment knob 17 is accidentally turned. In addition, in order to adjust the value of the above-mentioned trigger distance to suit a specific working scenario, a threaded barrel 20 is fixed to the bottom end of the contact disc 19. The threaded barrel 20 and the body 5 are threadedly engaged, and a tightening spring in a compressed state is provided in the axial direction between the two. This tightening spring is to maintain the stability of the threaded barrel 20 during the adjustment and installation process. The threaded barrel 20 can change the installation height of the contact disc 19, and then change the stroke of the conductive sheet 18 and the contact disc 19 when they are in contact and conductive. This corresponds to the selection of the degree of blockage when replacing the filtering part of the filter screen 8 and the selection of the amount of water pressure change, thereby improving versatility.

[0039] In addition, in order to promptly remind the user of the possible clogging problem of the second filter, in this embodiment, a conductive conduction block 22 is embedded in the inner top of the end cover 21, and a conductive rod 23 that can conduct electricity is fixed to the top of the connecting rod. The connecting rod is not conductive, and the conductive rod 23 is fixed to the contact plate 19 as a whole to form a contact similar to the above-mentioned one. The conduction block 22 is another contact. When the water pressure in the branch water pipe is within the set range, the conductive rod 23 maintains contact with the conduction block 22 above it, and makes a buzzer alarm in a circuit where the conduction block 22 is located in a disconnected state, that is, the buzzer alarm is in a normally closed state. When the conductive rod 23 and the conduction block 22 are in contact for a set time, for example, after 30 seconds, the two are still in contact, indicating that the filtering part of the filter 8 may have been replaced unsuccessfully, or has been used up, and a new filter 8 needs to be manually replaced, then a buzzer alarm is issued to remind the user. Specifically in practice, when the conductive rod 23 in the above circuit contacts the conductive block 22, the circuit in which it is located will short-circuit the working circuit of the buzzer alarm. Therefore, when the two are separated, the working circuit of the buzzer alarm resumes power supply and starts after the set time.

[0040] In the above description of the present invention, it should be noted that the terms "one side," "the other side," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0041] Furthermore, the term "identical" and similar terms do not necessarily require that the components be absolutely identical; slight variations are permitted. The term "perpendicular" simply refers to the positional relationship between components being more perpendicular than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in 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 arranged at intervals along the length direction of the branch water supply pipes (2), and a first filter and a second filter are respectively provided at the connection between the main water supply pipe (1) and the water source and the branch water supply pipes (2), characterized in that: The second filter comprises a main pipe (3), a filter screen (8), a filter plate (7), and a driving mechanism for driving the filter plate (7) to slide, wherein the main pipe (3) is connected in series to the branch water pipe (2), and the main pipe (3) has a mounting chamber (4) located at its cross section, and the mounting chamber (4) extends vertically above and below the main pipe (3); the filter screen (8) is embedded in the filter plate (7) with a smooth surface, and the filter plate (7) has a plurality of water-permeable holes (701) perpendicular to the plate surface; The driving mechanism comprises a slide plate (6) which is vertically slidably inserted into the upper portion of the main pipe (3). When the water pressure in the main pipe (3) decreases, the slide plate (6) slides downward by a set distance and drives the filter plate (7) to move downward by a stroke which is not less than the inner diameter of the main pipe (3).

2. The water-saving drip irrigation device for agricultural planting according to claim 1, characterized in that: A water pressure sensor is provided on the branch water supply pipe (2) at the inlet end of the main 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 driving mechanism can only operate when the water pressure value detected by the water pressure sensor is within a set range.

3. 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 installation chamber (4) via a support spring (25) below.

4. 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). The two sides of the sealing plug (27) are each provided with a guide block (28), and the guide block (28) is slidably connected to a vertical guide groove (29) in the side wall of the installation chamber (4).

5. The water-saving drip irrigation device for agricultural planting according to claim 1, characterized in that: The driving mechanism further comprises a body (5) fixed on the main pipe (3), wherein an upper magnetic ring (12), a middle magnetic ring (10), and a lower magnetic ring (11) are sequentially arranged in the body (5) from top to bottom, a connecting rod is fixed at the center of the middle magnetic ring (10), a conductive sheet (18) is fixed on the connecting rod, and a conductive contact disk (19) is fixed inside the body below the conductive sheet (18); the middle magnetic ring (10) and the upper magnetic ring (12) and the lower magnetic ring (11) all repel each other, so that the branch water pipe (2 ) is within a set range, the middle magnetic ring (10) stays in a set area in the body (5), in which the conductive sheet (18) on the connecting rod never contacts the contact disc (19), but when the water pressure in the branch water pipe (2) is below the set range, the conductive sheet (18) and the contact disc (19) remain in contact, thereby connecting a control circuit, which enables a driving element to drive the filter plate (7) to move downward within the installation chamber (4) to a set stroke.

6. The water-saving drip irrigation device for agricultural planting according to claim 5, characterized in that: The driving element is a micro electric push rod, the output end of which is connected to the top of the filter plate (7). When the control circuit is turned on, the micro electric push rod extends downward to a displacement of a set stroke.

7. The water-saving drip irrigation device for agricultural planting according to claim 5, characterized in that: The driving element is an oil cylinder (9), which is fixedly mounted on the top surface of the main body. The hydraulic oil output end of the oil 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 oil cylinder (9) pushes out a set amount of hydraulic oil to squeeze the filter plate (7) downward by a set stroke.

8. The water-saving drip irrigation device for agricultural planting according to claim 5, characterized in that: The interior of the slide plate (6) is hollow, and the bottom end has a semicircular surface protruding downward, and the top end is fixed with the middle magnetic ring (10); the top end of the upper magnetic ring (12) is fixed with a connecting ring (13), and a plurality of studs (14) that are not separated from the connecting ring (13) are rotatably installed in the top end of the connecting ring (13), and all the studs (14) are arranged in an array around the central axis of the upper magnetic ring (12). A cylindrical driving gear (15) is coaxially fixed to the top end of each stud (14), and all the driving gears (15) are meshed with an inner gear ring (16) rotatably installed on the outside thereof. The inner gear ring (16) is coaxially fixed in an adjusting knob (17), and the adjusting knob (17) is installed in the body (5) in a self-rotating manner in situ, and when the adjusting knob (17) is rotated, all the studs (14) move axially synchronously.

9. The water-saving drip irrigation device for agricultural planting according to claim 8, characterized in that: An end cover (21) is screwed into the top of the main body (5) in a threaded manner, and the end cover (21) presses and fixes the top of the adjusting knob (17); a threaded barrel (20) is fixed to the bottom of the contact disc (19), and the threaded barrel (20) and the main body (5) are threadedly matched, and a tightening spring in a compressed state is provided in the axial direction of the two.

10. The water-saving drip irrigation device for agricultural planting according to claim 9, characterized in that: A conductive conducting block (22) is embedded in the inner top of the end cover (21); a conductive rod (23) capable of conducting electricity is fixed to the top of the connecting rod, and the conductive rod (23) is fixed as a whole with the contact plate (19). When the water pressure in the branch water pipe is within a set range, the conductive rod (23) keeps in contact with the conducting block (22) above it, and makes a buzzer alarm in a circuit where the conducting block (22) is located in a disconnected state. When the contact time between the conductive rod (23) and the conducting block (22) reaches a set time, a buzzer alarm is emitted.

Images