A water-saving drip irrigation device

Abstract

A water-saving drip irrigation device includes: a nozzle with an integrally formed through cavity, the nozzle including an inlet at one end in a first direction, an outlet at the other end in the first direction, and a baffle plate integrally formed within the cavity; a filter screen fixedly connected to the cavity and located between the inlet and outlet; and a flow control element fixedly connected to the nozzle, including a spring fixedly connected inside the nozzle, a slide rod fixedly connected to the spring and located in a sliding cavity, and a push block fixedly connected to the slide rod and located on the side of the slide rod away from the spring, with a flow space formed between the push block and the cavity. Water flows into the cavity through the inlet and exits the drip irrigation device sequentially through the filter screen, the flow control element, and the outlet in the first direction. When the water pressure is too high, the water pressure forces the push block to slide along the baffle plate towards the side away from the spring, compressing the flow space. When the water pressure decreases, the spring elastically resets and restores the flow space.

Description

Technical Field

[0001] This utility model relates to the field of agricultural irrigation, and in particular to a water-saving drip irrigation device. Background Technology Drip irrigation technology, as a highly efficient and water-saving precision irrigation method, has been widely used in modern agriculture, landscaping, and greenhouse cultivation. Its core component, the drip irrigation nozzle (or dripper), is responsible for delivering pressurized water from the main pipeline directly to the crop root zone in a stable and uniform droplet or fine stream form, thereby greatly reducing water evaporation and runoff loss and achieving efficient water and fertilizer utilization. Currently, most drip irrigation nozzles on the market have a fixed flow channel structure. Their working principle is to reduce water pressure through internally pre-designed tiny, tortuous flow channels to achieve slow seepage of water droplets. However, these traditional drip irrigation nozzles have some technical shortcomings in practical applications.

[0002] First, the operating pressure of drip irrigation systems is constantly changing due to factors such as terrain undulations, pipe friction losses, pump performance fluctuations, and the switching on and off of different irrigation zones. For drip irrigation heads with fixed flow channels, the flow rate is positively correlated with the water pressure within the pipe; that is, higher pressure results in a larger flow rate at the nozzle outlet, and lower pressure results in a smaller flow rate. This leads to significant differences in the flow rate of drip irrigation heads located at different positions within the same irrigation system. Heads located at lower elevations or near the water supply line experience excessively high pressure and flow rates, wasting valuable water resources and contradicting the purpose of drip irrigation. This can even lead to soil erosion, fertilizer leaching, and root diseases. Conversely, heads located at higher elevations or farther from the water supply line experience insufficient pressure and flow rates, potentially preventing water from reaching the designated irrigation locations or depriving crops of sufficient water, thus hindering crop growth. In addition, commercially available drip irrigation nozzles typically have poor anti-clogging performance, and irrigation water inevitably contains impurities such as silt, biological slime, and algae. The internal structure of the dripper is easily affected by these impurities after long-term use, reducing water flow and even posing a risk of clogging when water pressure is insufficient, severely impacting the reliability and long-term stability of the drip irrigation system.

[0003] Therefore, it is necessary to provide a water-saving drip irrigation device that can adaptively control the water flow rate according to the water pressure and reduce the impact of impurities in the water on the water flow rate. Utility Model Content

[0004] The purpose of this invention is to provide a water-saving drip irrigation device that can adaptively control water flow to avoid excessive water consumption and reduce the impact of impurities in the water on water flow.

[0005] According to one aspect of this application, a water-saving drip irrigation device is provided, the drip irrigation device comprising: The nozzle has an internal cavity integrally formed along a first direction. The nozzle includes an inlet located at one end in the first direction, an outlet located at the other end in the first direction, and a baffle integrally formed in the cavity. A filter screen is fixedly connected to the cavity and located between the water inlet and the water outlet; A flow control element is fixedly connected to the nozzle. The flow control element includes a spring fixedly connected to the inside of the nozzle, a slide rod fixedly connected to the spring and located in a slide cavity integrally formed inside the nozzle, and a push block fixedly connected to the slide rod and located on the side of the slide rod away from the spring. A flow space is formed between the push block and the cavity. Water flows into the cavity through the inlet and passes sequentially through the filter, flow control device and outlet in the first direction before being discharged from the drip irrigation device. When the water pressure is too high, the water pressure squeezes the push block to slide away from the spring along the baffle plate, compressing the flow space. After the water pressure decreases, the spring elastically resets and restores the flow space.

[0006] More preferably, a limiting edge is integrally formed on the slide rod. The water flow squeezes the push block to slide towards the side of the push block away from the spring. When the limiting edge abuts against the slide cavity, it restricts the sliding of the push block.

[0007] More preferably, the nozzle also has an integrally formed base, which is located between the water inlet and the water outlet.

[0008] More preferably, the drip irrigation device further includes: The base is fixedly connected to the base and is located on the side of the base away from the cavity.

[0009] More preferably, the base includes: The telescopic rod is slidably connected to the base; A locking part is fixedly connected to the telescopic rod and is located on the side of the telescopic rod away from the base; An anchor point is integrally formed on the locking part.

[0010] More preferably, the base is further provided with a movable cavity, in which the telescopic rod is slidably connected and slides in the movable cavity along a second direction perpendicular to the surface of the base.

[0011] More preferably, the base is provided with a plurality of limiting holes, and when the telescopic rod slides toward the base along the second direction, the anchor point is embedded in the limiting holes on the base to fix the nozzle.

[0012] More preferably, when the telescopic rod slides away from the base along the second direction, the anchor point is pulled out from the limiting hole, and the locking part limits the base in the second direction.

[0013] More preferably, the side of the water inlet opposite to the cavity is integrally formed with a rotating thread.

[0014] More preferably, the nozzle further includes a drain component, which is threaded to the nozzle, passes through the nozzle, and communicates with the cavity.

[0015] This utility model has the following beneficial effects: When the water pressure inside the nozzle is high, the water flow pressure compresses the pusher block and reduces the flow space. Conversely, when the water pressure is low, the spring elastically resets, causing the pusher block to slide and restore the flow space. This allows the flow rate of water exiting the outlet through the flow space to be adaptively adjusted. Furthermore, a filter screen is installed between the flow control element and the inlet. This allows some impurities in the water to be filtered before flowing through the flow space in the first direction, preventing impurities from adhering to the flow space and further reducing the flow area, thus minimizing the impact of impurities on the water flow rate. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the drip irrigation device described in one embodiment of this application; Figure 2 For the Figure 1 A cross-sectional view AA of the nozzle of the drip irrigation device described herein, cut along shear line AA; Figure 3 For the Figure 1 The cross-sectional view BB of the drip irrigation device described in the figure, cut along the shear line BB; Figure 4 For the Figure 3 Enlarged view of point A in the middle; Reference numerals: 100, Drip irrigation device; 10, Sprinkler head; 11, Cavity; 12, Inlet; 12A, Rotary thread; 13, Outlet; 14, Limiting block; 15, Sliding cavity; 16, Base; 16A, Limiting hole; 17, Sewage discharge component; 20, Filter screen; 30, Flowing component; 31, Spring; 32, Sliding rod; 33, Push block; 40, Flow space; 50, Base; 51, Telescopic rod; 52, Locking part; 52A, Anchor point; 53, Movable cavity; F1, First direction; F2, Second direction. Detailed Implementation

[0018] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Please refer to Figure 1 - Figure 4 One embodiment of this application provides a water-saving drip irrigation device 100, which includes a nozzle 10, a filter screen 20, and a flow control element 30.

[0022] The nozzle 10 has an integrally formed cavity 11 extending along a first direction F1. The nozzle 10 includes an inlet 12 located at one end along the first direction F1, an outlet 13 located at the other end along the first direction F1, and a baffle 14 integrally formed within the cavity 11. The filter screen 20 is fixedly connected within the cavity 11 and located between the inlet 12 and the outlet 13. The flow control element 30 is fixedly connected to the nozzle 10. The flow control element 30 includes a spring 31 fixedly connected inside the nozzle 10, a slide rod 32 fixedly connected to the spring 31 and located in a slide cavity 15 integrally formed within the nozzle 10, and a push block 33 fixedly connected to the slide rod 32 and located on the side of the slide rod 32 opposite to the spring 31. A flow space 40 is formed between the push block 33 and the cavity 11. Water flows into the cavity 11 through the inlet 12 and passes through the filter 20, the flow control element 30 and the outlet 13 in sequence along the first direction F1 before being discharged from the drip irrigation device 100. When the water pressure is too high, the water pressure squeezes the push block 33 to slide along the baffle plate 14 away from the spring 31, compressing the flow space 40. After the water pressure decreases, the spring 31 elastically resets and restores the flow space 40.

[0023] The sprinkler head 10 is typically injection molded from corrosion-resistant, high-strength engineering plastics such as PP or ABS. Internally, it forms a cavity 11 that extends integrally along the first direction F1, i.e., the pipe extension direction. One end of the sprinkler head 10 is the inlet 12, used to connect to the water supply pipeline. The opposite end is the outlet 13, used to discharge a fine stream to the crop roots for drip irrigation. A baffle 14 is integrally formed on the sprinkler head 10 and protrudes from the inner wall of the cavity 11. A filter screen 20 is fixed to the inner wall of the cavity 11 by welding, and its position is between the inlet 12 and the outlet 13. More specifically, the filter screen 20 is located between the flow control element 30 and the inlet 12, and its purpose is to perform preliminary filtration of the water entering the cavity 11. The pore size of the filter screen 20 can be selected according to the water quality, for example, 80 mesh to 120 mesh, to effectively intercept larger particulate impurities such as silt and algae in the water. The nozzle 10 has an integrally formed space for housing the spring 31. One end of the spring 31 is fixed in this space, which is separated from the cavity 11 to prevent water from flowing into the space housing the spring 31 and affecting its performance. The other side of the spring 31 is fixedly connected to the slide rod 32, with the end of the spring 31 embedded in the slide rod 32. The slide rod 32 is located in the sliding cavity 15, which is connected to the space housing the spring 31. The slide rod 32 slides up and down within the sliding cavity 15. A cuboid push block 33 is welded to the other end of the slide rod 32. The push block 33 moves within the cavity 11 by sliding along the slide rod 32. When the water reaches the flow control element 30, because the baffle plate 14 and the push block 33 block part of the space within the cavity 11, when the water pressure is too high, the water will squeeze the space between the push block 33, the baffle plate 14, and the cavity 11. At this time, the push block 33 will overcome part of the elastic tension of the spring 31 and move to the other side. On the other side, the flow space 40 formed between the push block 33 and the inner wall of the cavity 11 on the other side is compressed as the push block 33 moves to this side. A smaller flow space 40 means that the water flow passing through the flow control element 30 will be reduced. Conversely, when the water pressure is low, the push block 33 is mainly subjected to the elastic tension of the spring 31, and the flow space 40 is normal, so the outflowing water flow is also normal. Normally, when the push block 33 is only subjected to the tension of the spring 31, the water flow through the flow space 40 is normal. As the water pressure increases and overcomes the tension of the spring 31 to further compress, the flow space 40 is compressed and the flow is restricted.

[0024] More preferably, a limiting edge is integrally formed on the slide bar 32. The water flow squeezes the push block 33 to slide towards the side of the push block 33 away from the spring 31. When the limiting edge abuts against the slide cavity 15, it restricts the sliding of the push block 33.

[0025] The sliding cavity 15 consists of two spaces: a narrower space near the cavity 11 and a wider space near the spring 31. The connection between the two spaces can be considered as a limiting structure. The limiting edge integrally formed on the slide rod 32 is wider than other parts of the slide rod 32, allowing it to move in the wider space but not in the narrower space. This means that when the limiting edge moves to the connection between the two spaces, its movement is restricted by the connection. In addition, the top of the wider space also restricts the movement of the slide rod 32. Therefore, by restricting the movement of the slide rod 32 through the sliding cavity 15, the push block 33 connected to the slide rod 32 is also restricted from moving within the cavity 11. This prevents the push block 33 from excessively blocking the flow channel within the cavity 11 in conjunction with the baffle plate 14, and also prevents the ineffective flow restriction effect caused by the ineffective movement of the push block 33.

[0026] More preferably, a base 14 is integrally formed on the nozzle 10, and the base 14 is located between the water inlet 12 and the water outlet 13.

[0027] The base 14 and the nozzle 10 are integrally molded using injection molding, forming a structurally stable whole. The main function of the base 14 is to enhance the structural stability of the nozzle 10 and provide a mounting point for the nozzle 10. Specifically, the design of the base 14 increases the contact area between the nozzle 10 and external mounting components, thereby improving overall mechanical strength by distributing the force. The base 14 is located in the middle of the nozzle 10, between the inlet 12 and the outlet 13. This layout helps maintain the balance of the nozzle 10 and avoids unnecessary vibration or displacement due to water pressure. In actual installation, the base 14 serves as the main fixed support structure. Through the limiting hole 14A on the base 14, the nozzle 10 can be firmly fixed to the drip irrigation system. This fixing method ensures that the nozzle 10 maintains the preset position and angle during operation, allowing the water flow to be accurately directed to the target irrigation area.

[0028] More preferably, the drip irrigation device 100 further includes a base 50. The base 50 is fixedly connected to the base 14 and is located on the side of the base 14 opposite to the cavity 11.

[0029] The base 50 and the base 14 are detachably connected for easy installation and maintenance. The base 50 is typically fixed to the ground, its main function being to provide stable support and fixation for the base 14. The base 50 is made of high-strength metal and its structural design also features a large support area, with the support surface usually corresponding to the size of the support surface of the base 14, effectively securing the nozzle 10 in the desired working position. The base 50 is fixedly connected to the base 14 via anchor points 52A that are embedded into the upper limit hole 14A, ensuring that the nozzle 10 will not loosen or shift during operation.

[0030] More preferably, the base 50 includes a telescopic rod 51 and a locking part 52.

[0031] The telescopic rod 51 is slidably connected to the base 50. The locking part 52 is fixedly connected to the telescopic rod 51 and is located on the side of the telescopic rod 51 opposite to the base 50. An anchor point 52A is integrally formed on the locking part 52.

[0032] The telescopic rod 51 is slidably connected to the interior of the base 50 and can be adjusted vertically. A locking part 52 is fixedly connected to the top of the telescopic rod 51. The locking part 52 is shaped like the eaves of a house and has a protruding anchor point 52A integrally formed below it. The structural design of the locking part 52 allows it to limit the base 14 located above the base 50. In actual use, the user can control the raising and lowering of the telescopic rod 51 by pulling out or pressing the locking part 52 with their fingers.

[0033] More preferably, the base 50 is further provided with a movable cavity 53, and the telescopic rod 51 is slidably connected in the movable cavity 53 and slides in the movable cavity 53 along a second direction F2 perpendicular to the surface of the base 50.

[0034] The second direction, F2, is vertical, allowing the telescopic rod 51 to move up and down along the direction perpendicular to the base 50. The movable cavity 53 is a square-shaped cavity located inside the base 50, with a precisely machined guide structure on its inner wall to ensure the telescopic rod 51 maintains a stable vertical trajectory during movement. The diameter or side length of the movable cavity 53 matches the shape and size of the counterweight on the telescopic rod 51 located within the movable cavity 53, ensuring smooth sliding of the telescopic rod 51 while effectively preventing swaying or deviation during movement.

[0035] More preferably, the base 14 is provided with a plurality of limiting holes 14A. When the telescopic rod 51 slides toward the base 50 along the second direction F2, the anchor point 52A is embedded in the limiting holes 14A on the base 14 to fix the nozzle 10.

[0036] The limiting holes 14A are evenly distributed on the outer ring of the circular base 14, arranged in pairs symmetrically along the center of the base 14. The limiting holes 14A are circular, and their diameter matches the shape of the anchor points 52A, forming a precise embedded fit. Two symmetrically arranged locking parts 52 are located on the base 50. The anchor points 52A of the two locking parts 52 are respectively embedded into the two symmetrically arranged limiting holes 14A, achieving two-point fixation. At this time, the base 14 is fixed above the base 50. The multiple limiting holes 14A provide various installation position options. Users can select different limiting holes 14A according to actual needs to adjust the installation angle of the sprinkler head 10 and the orientation of the outlet 13, greatly enhancing the adaptability and flexibility of the device and enabling it to meet the needs of different irrigation scenarios.

[0037] More preferably, when the telescopic rod 51 slides away from the base 50 along the second direction F2, the anchor point 52A is pulled out from the limiting hole 14A, and the locking part 52 limits the base 14 in the second direction F2.

[0038] When the position of the nozzle 10 needs to be adjusted or moved, the operator can pull the telescopic rod 51 upwards vertically. At this time, the anchor point 52A on the locking part 52 is smoothly pulled out of the limiting hole 14A of the base 14 as the telescopic rod 51 rises. After the anchor point 52A is completely disengaged from the limiting hole 14A, the locking part 52 effectively limits the base 14 in the vertical direction. Specifically, the lower surface of the locking part 52 abuts against the upper surface of the base 14, thus limiting the vertical movement. When the telescopic rod 51 slides upwards, the counterweight below it eventually abuts against the inner wall above the movable cavity 53, limiting the sliding of the telescopic rod 51.

[0039] More preferably, the inlet 12 has a rotating thread 12A integrally formed on the side opposite to the cavity 11.

[0040] The rotary thread 12A adopts a standard pipe thread design, such as some common thread sizes, to ensure compatibility with common irrigation pipe fittings on the market. The rotary thread 12A is precision-machined on the outer wall of the inlet 12. The main function of the rotary thread 12A is to enable quick connection with various irrigation system components. Through this threaded connection, the sprinkler head 10 can be easily connected to PE hoses, PVC rigid pipes, or metal water supply pipes of different specifications. Users simply align the pipe fitting with the rotary thread 12A on the inlet 12 and complete the connection by rotating. This standardized threaded connection method greatly improves the product's versatility and adaptability. At the same time, the threaded connection also facilitates the disassembly and replacement of the sprinkler head 10 or pipeline; simply unscrew the sprinkler head 10.

[0041] More preferably, the nozzle 10 further includes a drain component 15, which is threaded to the nozzle 10, passes through the nozzle 10, and communicates with the cavity 11.

[0042] The drain valve 15 is located at the bottom of the cavity 11 between the inlet 12 and the filter screen 20, precisely in the area where impurities in the water flow are most likely to accumulate. The drain valve 15 is a valve with external threads. It is connected to the nozzle 10 body via a precision thread, achieving a complete seal when tightened. When irrigation water enters the inlet 12, due to the reduced flow velocity and changed flow direction, heavier impurities such as silt will naturally settle at the bottom of the cavity 11, located in the front area of ​​the filter screen 20. Over long-term operation, these deposits may affect water intake efficiency or even clog the channels. When cleaning is required, the user simply unscrews the drain cap, and some of the impurities deposited in front of the filter screen 20 will automatically drain out under gravity. The remaining impurities can be backwashed using external flushing equipment or removed by hand.

[0043] Therefore, when the water pressure inside the nozzle 10 is high, the water flow pressure compresses the push block 33, causing it to slide and compress the flow space 40. Conversely, when the water pressure inside the nozzle 10 is low, the spring 31 elastically resets, causing the push block 33 to slide and restore the flow space 40. This allows the water flow rate through the flow space 40 to the outlet 13 to be adaptively adjusted. Furthermore, by using a filter screen 20 between the flow control element 30 and the inlet 12, some impurities in the water are filtered before flowing through the flow space 40 along the first direction F1. This prevents impurities from adhering to the flow space 40, further reducing the flow area and minimizing the impact of impurities on the water flow rate.

[0044] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A water-saving drip irrigation device, characterized in that, The drip irrigation device includes: The nozzle has an internal cavity integrally formed along a first direction. The nozzle includes an inlet located at one end in the first direction, an outlet located at the other end in the first direction, and a baffle integrally formed in the cavity. A filter screen is fixedly connected to the cavity and located between the water inlet and the water outlet; A flow control element is fixedly connected to the nozzle. The flow control element includes a spring fixedly connected to the inside of the nozzle, a slide rod fixedly connected to the spring and located in a slide cavity integrally formed inside the nozzle, and a push block fixedly connected to the slide rod and located on the side of the slide rod away from the spring. A flow space is formed between the push block and the cavity. Water flows into the cavity through the inlet and passes sequentially through the filter, flow control device and outlet in the first direction before being discharged from the drip irrigation device. When the water pressure is too high, the water pressure squeezes the push block to slide away from the spring along the baffle plate, compressing the flow space. After the water pressure decreases, the spring elastically resets and restores the flow space.

2. The water-saving drip irrigation device according to claim 1, characterized in that, A limiting edge is integrally formed on the slide rod. The water flow squeezes the push block to slide towards the side of the push block away from the spring. When the limiting edge abuts against the slide cavity, it restricts the sliding of the push block.

3. A water saving drip irrigation device according to claim 1, characterized in that, The nozzle also has an integrally formed base, which is located between the water inlet and the water outlet.

4. A water-saving drip irrigation device according to claim 3, characterized in that, The drip irrigation device also includes: The base is fixedly connected to the base and is located on the side of the base away from the cavity.

5. A water saving drip irrigation device according to claim 4, characterized in that The base includes: The telescopic rod is slidably connected to the base; A locking part is fixedly connected to the telescopic rod and is located on the side of the telescopic rod away from the base; An anchor point is integrally formed on the locking part.

6. A water-saving drip irrigation device according to claim 5, characterized in that, The base is also provided with a movable cavity, and the telescopic rod is slidably connected in the movable cavity and slides in the movable cavity along a second direction perpendicular to the surface of the base.

7. A water saving drip irrigation device according to claim 6, characterized in that The base is provided with several limiting holes. When the telescopic rod slides towards the base in the second direction, the anchor point is embedded in the limiting holes on the base to fix the nozzle.

8. A water saving drip irrigation device according to claim 7, characterized in that When the telescopic rod slides away from the base along the second direction, the anchor point is pulled out from the limiting hole, and the locking part limits the base in the second direction.

9. A water saving drip irrigation device according to claim 1, characterized in that, The inlet has a rotating thread integrally formed on the side opposite to the cavity.

10. A water saving drip irrigation device according to claim 1, characterized in that, The nozzle also includes a drain component, which is threaded to the nozzle, passes through the nozzle, and communicates with the cavity.

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