Low-power water-saving control irrigation system under complex terrain

Abstract

The application relates to the field of water-saving irrigation technology, in particular to a low-power water-saving control irrigation system under complex terrain, which comprises a drip irrigation pipe and a plurality of drip irrigation heads, each drip irrigation head comprises a main cylinder, a core cylinder and a pressure-compensated dripper, one end of the main cylinder is located in the drip irrigation pipe, the core cylinder is slidably arranged in the main cylinder in the axial direction of the main cylinder and separates the main cylinder into a first chamber and a second chamber, the first chamber is communicated with the drip irrigation pipe, a Tesla valve flow channel is arranged between the core cylinder and the main cylinder, the first chamber and the second chamber are communicated through the Tesla valve flow channel, and the water in the first chamber is in deceleration when passing through the Tesla valve flow channel; the pressure-compensated dripper is arranged at the end of the main cylinder far from the drip irrigation pipe and is communicated with the second chamber; the Tesla valve flow channel is arranged to reduce the pressure of the high-pressure water in the first chamber, the water pressure in the second chamber is reduced, and therefore the pressure-compensated dripper with a smaller compensation range can be used, and the compensation precision is improved.

Description

Technical Field

[0001] This invention relates to the field of water-saving irrigation technology, and in particular to a low-power water-saving control irrigation system for complex terrain. Background Technology

[0002] Water-saving irrigation is a major measure adopted by countries around the world to develop modern agriculture. Drip irrigation is an advanced and high-standard irrigation technology among water-saving irrigation. Drip irrigation pipes have the greatest advantages in terms of water saving, yield increase, high efficiency and environmental protection. They are widely used in fields, greenhouses, ecological gardens and urban greening. Existing drip irrigation emitters are connected to drip irrigation pipes. The flow channels on the drip irrigation emitters are connected to the drip irrigation pipes, and the water is discharged from the drip irrigation emitters.

[0003] Due to differences in terrain elevation and pipeline length, the water pressure within the system fluctuates significantly, resulting in noticeable differences in drip head flow rate with pressure variations. In some areas, the drip heads discharge excessive water, leading to water waste; in other areas, the water discharge is insufficient, causing crops to suffer from water and nutrient deficiencies, ultimately resulting in uneven crop growth and severely restricting the stability of crop quality and yield.

[0004] In existing technologies, the industry mostly uses pressure-compensating drip irrigation heads to address this problem. These heads utilize a built-in silicone membrane structure, where the silicone membrane senses changes in water pressure and deforms, thereby adjusting the cross-sectional area of ​​the flow channel to achieve flow compensation. However, when complex terrain causes excessive pressure differences within the system, the deformation adjustment range of the silicone membrane cannot cover the pressure fluctuation range, resulting in a significant reduction in the compensation effect. Furthermore, the compensation range is negatively correlated with the compensation accuracy; expanding the compensation range reduces the accuracy of flow compensation, leading to insufficient water output in some areas and excessive water output in others. Summary of the Invention

[0005] Therefore, it is necessary to provide a low-power, water-saving irrigation control system for complex terrain to address the problem of uneven drip irrigation from current drip irrigation heads.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A low-power, water-saving irrigation control system for complex terrain includes drip irrigation pipes and multiple drip heads. Each drip head includes a main cylinder, a core cylinder, a pressure-compensating dripper, and an adjustment mechanism. One end of the main cylinder is located in the drip irrigation pipe. The core cylinder is slidably disposed within the main cylinder along its axial direction and divides the main cylinder into a first chamber and a second chamber arranged along the axial direction of the main cylinder. The first chamber is connected to the drip irrigation pipe. A Tesla valve flow channel is provided between the core cylinder and the main cylinder. The first chamber and the second chamber are connected through the Tesla valve flow channel. Water in the first chamber flows through the Tesla valve flow channel into the second chamber with decelerated motion. The pressure-compensating dripper is disposed at the end of the main cylinder away from the drip irrigation pipe and is connected to the second chamber. The adjustment mechanism adjusts the distance the water flows in the Tesla valve flow channel when entering the second chamber from the first chamber according to the water pressure in the first chamber, thereby adjusting the flow rate of the water entering the second chamber. The distance the water flows in the Tesla valve flow channel is positively correlated with the water pressure in the first chamber.

[0008] Preferably, a groove is provided at one end of the core cylinder near the first chamber, and multiple water inlets are provided in the groove extending radially and arranged axially along the core cylinder. Each water inlet is connected to the Tesla valve flow channel and the groove. An outlet is provided at one end of the core cylinder near the second chamber, which is connected to the Tesla valve flow channel and located on the side away from the water inlet from the first chamber. The adjusting mechanism includes a first piston and a driving assembly. The first piston is slidably disposed in the groove along the axial direction of the core cylinder and is slidably connected to the core cylinder. The driving assembly is used to drive the first piston to slide in the groove and move closer to the first chamber after the water pressure in the first chamber increases.

[0009] Preferably, the adjusting mechanism further includes a slide cylinder, a second piston, a first spring, and a connecting rod. The slide cylinder is disposed in the first chamber and coaxial with the main cylinder. One end of the slide cylinder is sealed, and the other end is open, with the opening facing the core cylinder. The second piston is slidably disposed inside the slide cylinder along the axial direction and is slidably connected to the slide cylinder. The first spring is disposed inside the slide cylinder and connects the second piston and the bottom of the slide cylinder. The two ends of the connecting rod connect the first piston and the second piston. The cross-sectional area of ​​the second piston perpendicular to the axial direction of the slide cylinder is greater than the cross-sectional area of ​​the first piston perpendicular to the axial direction of the slide cylinder.

[0010] Preferably, the core tube is a conical tube with a large end and a small end. The small end of the core tube is close to the first chamber, and the large end is close to the second chamber. A second spring is provided in the second chamber. The second spring extends and contracts along the axial direction of the core tube and connects the core tube and the main tube. The large end and the small end of the core tube are respectively provided with bosses. The bosses are coaxial with the core tube and extend along the axial direction of the core tube and are slidably connected to the main tube. The Tesla valve flow channel is located between the two bosses and is composed of the inner wall of the main tube and the circumferential surface of the core tube.

[0011] Preferably, the Tesla valve flow channel includes two half-grooves, which together form a complete Tesla valve flow channel. One half-grooves is located on the main cylinder, and the other half-grooves are located on the circumferential surface of the core cylinder.

[0012] Preferably, the longitudinal section of the circumferential portion between the two bosses on the core cylinder is stepped, and the interior of the main cylinder is provided with a conical groove that matches the shape of the core cylinder. The core cylinder is slidably disposed in the conical groove along its own axial direction.

[0013] Preferably, the main tube includes an upper tube, a middle tube, and a lower tube. The upper tube, middle tube, and lower tube are coaxial and arranged sequentially along their own axial direction. One end of the upper tube extends into the drip irrigation pipe, and the other end of the upper tube is connected to the middle tube. The end of the middle tube away from the upper tube is connected to the lower tube. The first chamber is located in the upper tube, the core tube is located in the middle tube, the second chamber is located in the lower tube, and the pressure-compensating dripper is located on the lower tube.

[0014] Preferably, the lower cylinder is provided with a support plate, a slider and a transmission assembly. The support plate and the slider are both slidably disposed on the inner wall of the lower cylinder in the radial direction. The sliding support plate can abut against the large end of the core cylinder in the radial direction of the lower cylinder. When the water pressure in the second chamber changes, the slider slides and controls the sliding of the support plate on the inner cylinder through the transmission assembly. When the water pressure in the second chamber increases, the support plate slides and abuts against the core cylinder.

[0015] Preferably, the pressure-compensated dripper includes a connecting tube, a clamp, and a silicone membrane. The connecting tube is disposed on the lower cylinder, and the clamp is clamped onto the connecting tube. A third chamber is provided between the clamp and the connecting tube, and the third chamber is connected to the second chamber. The silicone membrane is disposed on the clamp and divides the third chamber into two cavities. The clamp has a through hole, and the two cavities are connected through the through hole. The clamp has a drip nozzle, which is connected to a cavity away from the second chamber and is located in the middle of the silicone membrane.

[0016] Preferably, the drip irrigation pipe is flexible, and the end of the upper cylinder that extends into the drip irrigation pipe is provided with a convex ring. The circumferential surface of the convex ring is inclined, and the inclined surface gradually moves away from the axis of the main cylinder from the side of the convex ring away from the top ring to the side of the convex ring closer to the top ring. The drip irrigation pipe has an opening with a diameter smaller than that of the convex ring, and the convex ring can be inserted into the opening. A top ring is fitted on the upper cylinder. The top ring is located outside the drip irrigation pipe and is threadedly connected to the main cylinder. The top ring and the convex ring clamp the drip irrigation pipe between them.

[0017] The beneficial effects of this invention are: by setting up a Tesla valve flow channel to reduce the pressure of the high-pressure water in the first chamber, the water pressure in the second chamber is reduced, thereby enabling the use of pressure-compensated drippers with a smaller compensation range and improving compensation accuracy; by setting up an adjustment mechanism to adjust the length of the Tesla valve flow channel between the first and second chambers according to the water pressure in the first chamber, the water pressure in the second chamber is controlled, thereby reducing the pressure difference in the second chambers of multiple drip heads, thus ensuring the normal use of the pressure-compensated drippers and further improving the uniformity of the water volume sprayed from multiple pressure-compensated drippers. Attached Figure Description

[0018] Figure 1A schematic diagram of a low-power, water-saving irrigation control system for complex terrain provided in an embodiment of the present invention;

[0019] Figure 2 A front view of the main cylinder of a low-power water-saving control irrigation system for complex terrain, provided in an embodiment of the present invention;

[0020] Figure 3 for Figure 2 Sectional view along the middle AA direction;

[0021] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0022] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0023] Figure 6 A cross-sectional view of the middle cylinder of a low-power water-saving control irrigation system for complex terrain provided in an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the core of a low-power, water-saving control irrigation system for complex terrain, provided as an embodiment of the present invention.

[0025] in:

[0026] 100. Drip irrigation tube; 101. Upper tube; 102. Middle tube; 103. Lower tube; 104. Core tube; 105. First chamber; 106. Second chamber; 107. Connecting tube; 108. Clip; 109. Silicone membrane; 110. Through hole; 111. Drip outlet; 112. Third chamber; 113. Tesla valve flow channel; 114. Groove; 115. Inlet; 116. Outlet; 117. First piston; 118. Slide tube; 119. Second piston; 120. First spring; 121. Connecting rod; 122. Support plate; 123. Slider; 124. Lever; 125. Second spring; 126. Third spring; 127. Top ring; 128. Convex ring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0028] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They 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 limiting the invention.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] like Figures 1 to 7 As shown, this embodiment of the invention provides a low-power, water-saving irrigation control system for complex terrain, including a drip irrigation pipe 100 and multiple drip heads. Each drip head includes a main cylinder, a core cylinder 104, a pressure-compensating dripper, and an adjustment mechanism. One end of the main cylinder is located in the drip irrigation pipe 100. The core cylinder 104 is slidably disposed within the main cylinder along its axial direction and divides the main cylinder into a first chamber 105 and a second chamber 106 arranged along the axial direction of the main cylinder. The first chamber 105 communicates with the drip irrigation pipe 100. A Tesla valve flow channel 113 is provided between the core cylinder 104 and the main cylinder. The first chamber 105 and the second chamber 106... 6. The water in the first chamber 105 flows through the Tesla valve channel 113 to the second chamber 106, and the flow is decelerated. The pressure-compensated dripper is located at the end of the main cylinder away from the drip pipe 100 and is connected to the second chamber 106. The regulating mechanism adjusts the distance the water flows in the Tesla valve channel 113 when it enters the second chamber 106 from the first chamber 105 according to the water pressure in the first chamber 105, thereby adjusting the flow rate of the water entering the second chamber 106. The distance the water flows in the Tesla valve channel 113 is positively correlated with the water pressure in the first chamber 105.

[0031] A Tesla valve flow channel 113 is provided to reduce the pressure of the high-pressure water in the first chamber 105, thereby reducing the water pressure in the second chamber 106. This allows the use of pressure-compensated drippers with a smaller compensation range, improving compensation accuracy. An adjustment mechanism is provided to adjust the length of the Tesla valve flow channel 113 between the first chamber 105 and the second chamber 106 according to the water pressure in the first chamber 105, thereby controlling the water pressure in the second chamber 106. This reduces the pressure difference in the second chamber 106 among the multiple drip heads, ensuring the normal use of the pressure-compensated drippers and further improving the uniformity of water output from the multiple pressure-compensated drippers.

[0032] In this embodiment, a groove 114 is provided at one end of the core cylinder 104 near the first chamber 105. A plurality of water inlets 115 are provided in the groove 114, extending radially along the core cylinder 104 and arranged axially along the core cylinder 104. Each water inlet 115 is connected to the Tesla valve flow channel 113 and the groove 114. A water outlet 116 is provided at one end of the core cylinder 104 near the second chamber 106. The water outlet 116 is connected to the Tesla valve flow channel 113 and is located on the side of the water inlet 115 away from the first chamber 105. The adjustment mechanism includes a first piston 117 and a drive assembly. The first piston 117 is slidably disposed in the groove 114 along the axial direction of the core cylinder 104 and is slidably connected to the core cylinder 104. The drive assembly is used to drive the first piston 117 to slide in the groove 114 and move closer to the first chamber 105 after the water pressure in the first chamber 105 increases. Water in the first chamber 105 enters the Tesla valve flow channel 113 through the inlet 115 in the groove 114, and after being decelerated by the Tesla valve flow channel 113, it enters the second chamber 106. When the first piston 117 approaches the first chamber 105 in the groove 114, it can block the inlet 115 it passes through, so that the water in the groove 114 cannot enter the Tesla valve flow channel 113 through the inlet 115. When the second piston 119 approaches the first chamber 105, the blocked inlet 115 is never connected to the groove 114, so the water in the Tesla valve flow channel 113 will not enter the groove 114 on the side of the first piston 117 away from the first chamber 105 through the inlet 115.

[0033] When the first piston 117 approaches the first chamber 105, the flow rate of water entering the second chamber 106 from the first chamber 105 will gradually decrease.

[0034] The core cylinder 104 is provided with a plurality of first locking blocks, which are located in the groove 114 and arranged along the circumferential direction of the core cylinder 104. The first piston 117 is provided with a plurality of first locking slots that are adapted to the first locking blocks. Each first locking block is slidably disposed in one of the first locking slots along the axial direction of the core cylinder 104. The first piston 117 and the core cylinder 104 are engaged in the circumferential direction of the core cylinder 104.

[0035] In this embodiment, the adjusting mechanism further includes a slide cylinder 118, a second piston 119, a first spring 120, and a connecting rod 121. The slide cylinder 118 is disposed in the first chamber 105 and coaxial with the main cylinder. One end of the slide cylinder 118 is sealed, and the other end is open, with the opening facing the core cylinder 104. The second piston 119 is slidably disposed inside the slide cylinder 118 along the axial direction and is slidably connected to the slide cylinder 118. The first spring 120 is disposed inside the slide cylinder 118 and connects the second piston 119 and the bottom of the slide cylinder 118. The two ends of the connecting rod 121 are connected to the first piston 117 and the second piston 119. The second piston 119 is perpendicular to the axis of the slide cylinder 118. The cross-sectional area of ​​the first piston 117 in the direction perpendicular to the axial direction of the slide 118 is greater than the cross-sectional area of ​​the first piston 117 in the direction perpendicular to the axial direction of the slide 118. When the water pressure inside the first chamber 105 increases, the force on the second piston 119 is greater than the force on the first piston 117. Therefore, the second piston 119 will compress the first spring 120 and drive the first piston 117 to slide closer to the first chamber 105 through the connecting rod 121, blocking part of the inlet 115. This changes the distance between the outlet 116 and the nearest inlet 115, adjusts the shortest distance the water flows in the Tesla valve channel 113, and changes the water flow speed at the outlet 116.

[0036] Specifically, when no water is introduced into the first chamber 105, the first spring 120 is in its normal state, the second piston 119 is located inside the slide cylinder 118 and near the opening of the slide cylinder 118, and the first piston 117 is not blocking the water inlet 115 in the groove 114. Multiple second locking blocks are provided on the inner wall of the slide cylinder 118, arranged circumferentially along the second piston 119. Multiple second locking slots adapted to the second locking blocks are provided on the second piston 119. Each second locking block is slidably disposed in a second locking slot along the axial direction of the core cylinder 104, and the second piston 119 and the slide cylinder 118 are engaged in the circumferential direction of the second piston 119.

[0037] In this embodiment, the core cylinder 104 is slidably connected to the main cylinder along its own axial direction. The core cylinder 104 is a conical cylinder with a large end and a small end. The small end of the core cylinder 104 is close to the first chamber 105, and the large end is close to the second chamber 106. A second spring 125 is provided in the second chamber 106. The second spring 125 extends and contracts along the axial direction of the core cylinder 104 and connects the core cylinder 104 and the main cylinder. The large end and the small end of the core cylinder 104 are respectively provided with bosses. The bosses are coaxial with the core cylinder 104 and extend along the axial direction of the core cylinder 104 and are slidably connected to the main cylinder. The Tesla valve flow channel 113 is located between the two bosses and is composed of the inner wall of the main cylinder and the circumferential surface of the core cylinder 104.

[0038] Specifically, the Tesla valve flow channel 113 is spirally shaped on the circumference of the core cylinder 104, which extends the length of the Tesla valve flow channel 113 and better controls the flow rate of water entering the second chamber 106. When the Tesla valve flow channel 113 is not blocked, the second spring 125 keeps the core cylinder 104 in contact with the main cylinder. When the Tesla valve flow channel 113 is blocked, the water in the first chamber 105 will exert pressure on the core cylinder 104 because it cannot drain out, causing the core cylinder 104 to compress the second spring 125. At this time, the part between the two protrusions of the core cylinder 104 will separate from the main cylinder, and the space between it and the main cylinder will increase. Impurities in the Tesla valve flow channel 113 will be dispersed due to the increased distance between the main cylinder and the core cylinder 104, and the outlet 116 can continue to drain water.

[0039] In this embodiment, the Tesla valve flow channel 113 includes two half-grooves, which together form a complete Tesla valve flow channel 113. One half-grooves is located on the main cylinder, and the other half-grooves are located on the circumferential surface of the core cylinder 104. When the Tesla valve flow channel 113 is blocked and the core cylinder 104 is separated from the main cylinder, the impurities in the Tesla valve flow channel 113 will be cut by the two staggered half-grooves, making them easier to disperse by the water flow.

[0040] In this embodiment, the longitudinal section of the circumferential portion between the two bosses on the core cylinder 104 is stepped. The interior of the main cylinder is provided with a conical groove that matches the shape of the core cylinder 104, and the core cylinder 104 is slidably disposed in the conical groove along its own axial direction. The Tesla valve flow channel 113 is located on the stepped circumferential surface of the core cylinder 104. When the Tesla valve flow channel 113 is blocked, impurities in the two half-grooves are more likely to fall out of the half-grooves.

[0041] In this embodiment, the main tube includes an upper tube 101, a middle tube 102, and a lower tube 103. The upper tube 101, middle tube 102, and lower tube 103 are coaxial and arranged sequentially along their own axial direction. One end of the upper tube 101 extends into the drip irrigation pipe 100, and the other end of the upper tube 101 is connected to the middle tube 102. The end of the middle tube 102 away from the upper tube 101 is connected to the lower tube 103. The first chamber 105 is located inside the upper tube 101, the core tube 104 is disposed inside the middle tube 102, the second chamber 106 is located inside the lower tube 103, and the pressure-compensated dripper is disposed on the lower tube 103. The main tube is divided into an upper tube 101, a middle tube 102, and a lower tube 103, which facilitates the installation of its internal components.

[0042] Specifically, a conical groove is formed inside the middle cylinder 102, and two bosses on the core cylinder 104 are slidably disposed in the conical groove and slidably connected to the middle cylinder 102; the second spring 125 is disposed in the lower cylinder 103, and the slide cylinder 118 is disposed in the upper cylinder 101.

[0043] In this embodiment, the lower cylinder 103 is provided with a support plate 122, a slider 123 and a transmission assembly. The support plate 122 and the slider 123 are both slidably disposed on the inner wall of the lower cylinder 103 in the radial direction. The support plate 122 can slide to abut against the large end of the core cylinder 104 in the radial direction of the lower cylinder 103. When the water pressure in the second chamber 106 changes, the slider 123 slides and controls the sliding of the support plate 122 on the inner cylinder through the transmission assembly. When the water pressure in the second chamber 106 increases, the support plate 122 slides and abuts against the core cylinder 104.

[0044] Specifically, an installation cavity is formed on the inner wall of the lower cylinder 103, which is separated from the second chamber 106. The support plate 122 and the slider 123 can slide into the installation cavity. The transmission assembly includes a lever 124 and a third spring 126. The lever 124 is rotatably disposed in the installation cavity and located on the side of the support plate 122 and the slider 123 away from the center of the lower cylinder 103. The rotation center of the lever 124 is in the middle, and the two ends of the lever 124 are in contact with the slider 123 and the support plate 122, respectively. The third spring 126 is disposed in the installation cavity and connects the lower cylinder 103 and the support plate 122. The third spring 126 extends and retracts in the radial direction of the lower cylinder 103. Under normal conditions, the projections of the support plate 122 and the core cylinder 104 in the axial direction of the core cylinder 104 do not coincide. When the Tesla valve flow channel 113 is not blocked and the second chamber 106 is filled with water and generates a certain pressure, the water pressure will push the slider 123 away from the center of the lower cylinder 103, thereby pushing the support plate 122 to compress the third spring 126 through the lever 124. The projections of the support plate 122 and the core cylinder 104 in the axial direction of the core cylinder 104 will coincide, and the support plate 122 will slide in contact with the core cylinder 104, preventing the core cylinder 104 from sliding along its own axis. This avoids the core cylinder 104 sliding due to unstable water pressure in the first chamber 105.

[0045] In this embodiment, the pressure-compensated dripper includes a connecting tube 107, a clamp 108, and a silicone membrane 109. The connecting tube 107 is disposed on the lower cylinder 103, and the clamp 108 is clamped onto the connecting tube 107. A third chamber 112 is provided between the clamp 108 and the connecting tube 107. The third chamber 112 is connected to the second chamber 106. The silicone membrane 109 is disposed on the clamp 108 and divides the third chamber 112 into two cavities. The clamp 108 is provided with a through hole 110, through which the two cavities are connected. The through hole 110 is located at a position away from the center of the silicone membrane 109. The clamp 108 is provided with a drip outlet 111, which is connected to a cavity away from the second chamber 106 and is located at the center of the silicone membrane 109. After entering one of the cavities in the third chamber 112 from the second chamber 106, the water first impacts the silicone membrane 109, causing the silicone membrane 109 to deform and reduce the cross-sectional area of ​​the water flow in the other cavity, thereby regulating the amount of water discharged from the drip nozzle 111.

[0046] In this embodiment, the drip irrigation tube 100 is flexible. One end of the upper cylinder 101 that extends into the drip irrigation tube 100 is provided with a protruding ring 128. The circumferential surface of the protruding ring 128 is inclined. The inclined surface gradually moves away from the axis of the main cylinder from the side of the protruding ring 128 away from the top ring 127 to the side closer to the top ring 127. The drip irrigation tube 100 has an opening with a diameter smaller than that of the protruding ring 128. The protruding ring 128 can be inserted into the opening. The top ring 127 is sleeved on the upper cylinder 101. The top ring 127 is located outside the drip irrigation tube 100 and is threadedly connected to the main cylinder. The top ring 127 and the protruding ring 128 clamp the drip irrigation tube 100 between them.

[0047] Specifically, the upper cylinder 101 is easier to insert into the drip irrigation tube 100 due to the guide of the inclined surface. When the end of the upper cylinder 101 with the protruding ring 128 is inserted into the drip irrigation tube 100 through the opening, the opening can be enlarged by the protruding ring 128 and restored by its own toughness. The mutual approach of the top ring 127 and the protruding ring 128 squeezes the area around the opening, thereby fixing the upper cylinder 101 and preventing water leakage at the connection between the upper cylinder 101 and the drip irrigation tube 100.

[0048] The working principle of the low-power water-saving irrigation control system for complex terrain provided in the above embodiments is as follows:

[0049] First, using a tool, make an opening slightly smaller than the convex ring 128 at a suitable position on the drip irrigation tube 100. Then, insert the end of the upper cylinder 101 with the convex ring 128 into the drip irrigation tube 100 through the opening. During the process, the convex ring 128 will expand the opening, and then the opening will return to its original shape due to the toughness of the drip irrigation tube 100 itself. Next, rotate the top ring 127, and the top ring 127 will move closer to the convex ring 128 until it touches it. At this time, the top ring 127 and the convex ring 128 hold the opening of the drip irrigation tube 100, and the water in the drip irrigation tube 100 will not flow out from the opening.

[0050] After the upper cylinder 101 is installed, high-pressure water is introduced into the drip irrigation pipe 100. The water flows through the upper cylinder 101 into the first chamber 105 and then into the groove 114. It flows through the inlet 115 into the Tesla valve channel 113, and then decelerates in the Tesla valve channel 113 before entering the second chamber 106 through the outlet 116. When the water pressure in the second chamber 106 increases to a certain level, it will push the slider 123 away from the center of the lower cylinder 103 in the radial direction. The slider 123 slides and drives the lever 124 to rotate. After the lever 124 rotates, it will push the support plate 122 to move closer to the center of the lower cylinder 103 in the radial direction. When the support plate 122 slides, it will compress the third spring 126 and slide into contact with the large end of the core cylinder 104, supporting the core cylinder 104 and preventing the core cylinder 104 from sliding in the axial direction.

[0051] Next, water from the second chamber 106 enters one of the cavities of the third chamber 112 and comes into contact with the silicone membrane 109. The water then enters another cavity through the through hole 110 and finally exits from the drip outlet 111. The pressure change in the second chamber 106 alters the impact force of the water entering the third chamber 112 on the silicone membrane 109, thus changing the deformation of the silicone membrane 109 and consequently altering the drainage volume of the drip outlet 111.

[0052] If the water pressure in the first chamber 105 increases, the water in the first chamber 105 will exert a greater thrust on the first piston 117 and the second piston 119. Since the force-bearing area of ​​the second piston 119 is greater than that of the first piston 117, the second piston 119 will compress the first spring 120 and drive the first piston 117 to move closer to the first chamber 105 through the connecting rod 121. When the first piston 117 moves closer to the first chamber 105, it will block the inlet 115 it passes through. The water in the groove 114 enters the Tesla valve flow channel 113 through the inlet 115 and the flow path in the Tesla valve flow channel 113 is extended. The water flow velocity in the second chamber 106 will decrease, thereby reducing the pressure in the second chamber 106. Similarly, when the water pressure in the first chamber 105 decreases, the first piston 117 will move away from the first chamber 105, the originally blocked inlet 115 will reopen, the path of the water in the groove 114 through the Tesla valve flow channel 113 when entering the second chamber 106 will be reduced, the change in water flow velocity will be reduced, and the pressure in the second chamber 106 will increase accordingly.

[0053] When the Tesla valve flow channel 113 becomes blocked, the water in the second chamber 106 stops increasing, the thrust on the slider 123 decreases, the third spring 126 returns to its original position and pushes the support plate 122 to slide. The support plate 122 slides relative to the core cylinder 104 and separates from it. Simultaneously, the sliding of the support plate 122, through the lever 124, causes the slider 123 to move closer to the center of the lower cylinder 103. After the core cylinder 104 loses the support of the support plate 122, it is compressed by the water pressure in the first chamber 105 and moves closer to the second chamber 106. The two half-grooves in the Tesla valve flow channel 113 separate from each other, the pressure on the impurities blocked in the half-grooves decreases, and the water flow in the two half-grooves increases. The water flow carries the loose impurities, thus preventing blockage inside the Tesla valve flow channel 113. After the impurities are dispersed, the core cylinder 104 returns to its original position under the action of the second spring 125. As the water pressure in the second chamber 106 increases, the support plate 122 can slide again to support the core cylinder 104.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A low-power, water-saving irrigation control system for complex terrain, characterized in that, include: The system comprises a drip irrigation tube and multiple drip heads. Each drip head includes a main tube, a core tube, a pressure-compensating dripper, and an adjustment mechanism. One end of the main tube is located within the drip irrigation tube. The core tube is slidably disposed within the main tube along its axial direction, dividing the main tube into a first chamber and a second chamber arranged along the axial direction of the main tube. The first chamber is connected to the drip irrigation tube. A Tesla valve flow channel is provided between the core tube and the main tube. The first and second chambers are connected through the Tesla valve flow channel. Water in the first chamber flows through the Tesla valve flow channel into the second chamber with decelerated motion. The pressure-compensating dripper is disposed at the end of the main tube away from the drip irrigation tube and is connected to the second chamber. The adjustment mechanism adjusts the distance the water travels in the Tesla valve flow channel when entering the second chamber from the first chamber according to the water pressure in the first chamber, thereby adjusting the flow rate of the water entering the second chamber. The distance the water travels in the Tesla valve flow channel is positively correlated with the water pressure in the first chamber. A groove is formed at one end of the core cylinder near the first chamber. Multiple inlets extending radially and arranged axially within the groove are located within the groove. Each inlet connects to the Tesla valve flow channel and the groove. An outlet is formed at one end of the core cylinder near the second chamber, connected to the Tesla valve flow channel and located on the side away from the inlets. The adjusting mechanism includes a first piston, a drive assembly, a slide cylinder, a second piston, a first spring, and a connecting rod. The first piston is slidably disposed in the groove along the axial direction of the core cylinder and slidably connected to the core cylinder. The drive assembly is used for... After the water pressure in the first chamber increases, it drives the first piston to slide in the groove and move closer to the first chamber; the slide cylinder is set in the first chamber and is coaxial with the main cylinder. One end of the slide cylinder is sealed and the other end is open, with the opening facing the core cylinder. The second piston is slidably set inside the slide cylinder along the axial direction and is slidably connected to the slide cylinder. The first spring is set inside the slide cylinder and connects the second piston and the bottom of the slide cylinder. The two ends of the connecting rod connect the first piston and the second piston; the cross-sectional area of ​​the second piston perpendicular to the axial direction of the slide cylinder is larger than the cross-sectional area of ​​the first piston perpendicular to the axial direction of the slide cylinder. The main tube includes an upper tube, a middle tube, and a lower tube. The upper tube, middle tube, and lower tube are coaxial and arranged sequentially along their own axial direction. One end of the upper tube extends into the drip irrigation pipe, and the other end of the upper tube is connected to the middle tube. The end of the middle tube away from the upper tube is connected to the lower tube. The first chamber is located in the upper tube, the core tube is located in the middle tube, the second chamber is located in the lower tube, and the pressure-compensating dripper is located on the lower tube.

2. The low-power, water-saving irrigation control system for complex terrain as described in claim 1, characterized in that, The core tube is a conical tube with a large end and a small end. The small end of the core tube is close to the first chamber, and the large end is close to the second chamber. A second spring is provided in the second chamber. The second spring extends and contracts along the axial direction of the core tube and connects the core tube and the main tube. The large end and the small end of the core tube are respectively provided with bosses. The bosses are coaxial with the core tube and extend along the axial direction of the core tube and are slidably connected to the main tube. The Tesla valve flow channel is located between the two bosses and is composed of the inner wall of the main tube and the circumferential surface of the core tube.

3. The low-power, water-saving irrigation control system for complex terrain as described in claim 2, characterized in that, The Tesla valve flow channel includes two half-grooves, which together form a complete Tesla valve flow channel. One half-grooves is located on the main cylinder, and the other half-grooves are located on the circumferential surface of the core cylinder.

4. The low-power, water-saving irrigation control system for complex terrain according to claim 2, characterized in that, The longitudinal section of the circumferential portion between the two bosses on the core tube is stepped, and the interior of the main tube is provided with a conical groove that matches the shape of the core tube. The core tube slides in the conical groove along its own axial direction.

5. The low-power, water-saving irrigation control system for complex terrain according to claim 1, characterized in that, The lower cylinder is equipped with a support plate, a slider, and a transmission assembly. The support plate and the slider are both slidably mounted on the inner wall of the lower cylinder in the radial direction. The sliding support plate can abut against the large end of the core cylinder in the radial direction of the lower cylinder. When the water pressure in the second chamber changes, the slider slides and controls the sliding of the support plate on the inner cylinder through the transmission assembly. When the water pressure in the second chamber increases, the support plate slides and abuts against the core cylinder.

6. The low-power, water-saving irrigation control system for complex terrain according to claim 1, characterized in that, The pressure-compensated dripper includes a connecting tube, a clamp, and a silicone membrane. The connecting tube is located on the lower cylinder, and the clamp is clamped onto the connecting tube. A third chamber is provided between the clamp and the connecting tube, and the third chamber is connected to the second chamber. The silicone membrane is located on the clamp and divides the third chamber into two cavities. The clamp has a through hole, and the two cavities are connected through the through hole. The clamp has a drip nozzle, which is connected to a cavity away from the second chamber and is located in the middle of the silicone membrane.

7. The low-power, water-saving irrigation control system for complex terrain according to claim 1, characterized in that, The drip irrigation tube is flexible. The upper cylinder has a convex ring at one end that extends into the drip irrigation tube. The circumference of the convex ring is inclined. The inclined surface gradually moves away from the axis of the main cylinder from the side of the convex ring away from the top ring to the side of the convex ring closer to the top ring. The drip irrigation tube has an opening with a diameter smaller than that of the convex ring, which can be inserted into the opening. A top ring is fitted on the upper cylinder. The top ring is located outside the drip irrigation tube and is threaded to the main cylinder. The top ring and the convex ring clamp the drip irrigation tube between them.

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