Alternating irrigation device for landscape nursery

Abstract

The present application relates to watering technology field, specifically to a kind of about landscape nursery alternate irrigation device including main pipe, control device and sprinkler;Control device includes control box, control valve horizontally sliding in control box, transmission slide that vertically sliding in control box and first turntable and second turntable rotationally arranged in control box;Fan-shaped cavity filled with water-absorbing resin is formed between first turntable and second turntable;Transmission slide is connected with second turntable transmission, to drive transmission slide sliding when second turntable rotates;Control valve is connected with transmission slide transmission, control valve slides relative to control box when transmission slide slides;Realize the automatic alternate switching of the on-off of sprinkler, without relying on complex electric control system or external sensor, higher structural reliability, can effectively improve water use efficiency, benefit to reduce the labor and operating cost of garden landscape and nursery maintenance, realize flexible, efficient water-saving irrigation.

Description

Technical Field

[0001] This invention relates to the field of watering technology, and more specifically to an alternating irrigation device for landscape seedlings. Background Technology

[0002] Existing landscape seedling irrigation usually relies on fixed time intervals or preset humidity thresholds to control the amount of irrigation water. It is difficult to adjust the humidity control parameters in a timely manner according to the change of plant species in the area, which may cause some seedlings to be in a state of excessive moisture or water shortage for a long time, affecting the balanced growth.

[0003] In addition, although systems using electronically controlled valves or sensors can achieve a certain degree of automation, their installation, adjustment and maintenance costs are high, and they are easily affected by external factors in garden landscape environments, making it inconvenient to adjust local humidity, and their reliability is relatively low. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an alternating irrigation device for landscape seedlings.

[0005] To achieve the above objectives, the specific solution of the present invention is as follows: an alternating irrigation device for landscape seedlings, comprising a main pipeline, a control device connected to the main pipeline, and a spray head connected to the control device;

[0006] The control device includes a control housing, a control valve horizontally slidable within the control housing, a transmission slide vertically slidable within the control housing, and a first turntable and a second turntable rotatably disposed within the control housing. A variable-volume sector-shaped cavity is formed between the first turntable and the second turntable. The sector-shaped cavity is filled with water-absorbing resin, which expands after absorbing water and can push the second turntable to rotate relative to the first turntable, thereby increasing the volume of the sector-shaped cavity. The transmission slide is driven to the second turntable to drive the transmission slide to slide when the second turntable rotates. The control valve is driven to the transmission slide, and when the transmission slide slides, the control valve slides relative to the control housing, thereby controlling the on / off connection between the main pipeline and the spray head.

[0007] Furthermore, the control box contains a housing above the transmission slide; both the first turntable and the second turntable are located within the housing; the first turntable extends a first partition within the housing; the second turntable extends a second partition within the housing; the first partition, the second partition, the housing, and the control box together form the fan-shaped cavity.

[0008] Furthermore, the control box has a recessed accommodating groove at a position corresponding to the housing; the bottom of the accommodating groove has a through hole communicating with the fan-shaped cavity; and a capillary material layer and a water-permeable membrane layer are stacked sequentially from bottom to top inside the accommodating groove.

[0009] Furthermore, the control box includes a box body and a cover plate disposed on the top of the box body; the receiving groove is disposed on the top surface of the cover plate.

[0010] Furthermore, the present invention includes a rotating rod rotatably passing through the center of the housing; the center of the second turntable is fixedly sleeved with the upper end of the rotating rod; the transmission slide is slidably sleeved on the outer wall of the rotating rod; a spiral groove is formed on the outer wall of the rotating rod; a locking pin is provided on the inner wall of the transmission slide; and the locking pin is movably embedded in the spiral groove.

[0011] Furthermore, a first spring is connected between the bottom surface of the transmission slide and the inner bottom wall of the control box.

[0012] Furthermore, the control box contains a mounting plate between the transmission slide and the control valve; the transmission slide has a drive groove on the side near the control valve; the mounting plate has an elastic telescopic rod; the mounting plate also has a strip-shaped hole extending along the sliding direction of the control valve; the control valve has a strip-shaped groove on the side facing the mounting plate; one end of the elastic telescopic rod is hinged to the mounting plate; the other end of the elastic telescopic rod has a drive pin that moves through the strip-shaped hole; one end of the drive pin is movably embedded in the drive groove; the other end of the drive pin is movably embedded in the strip-shaped groove.

[0013] Furthermore, the first turntable has an adjusting shaft protruding from its center; the adjusting shaft passes sequentially through the top of the control box, the capillary material layer, and the water-permeable membrane layer; an adjusting knob and a positioning plate are elastically floatingly connected to the top of the adjusting shaft outside the control box; a locking pin is movably provided within the adjusting shaft; the locking pin moves radially through the adjusting shaft; the inner wall of the positioning plate has multiple equally spaced locking holes distributed circumferentially; when the locking pin is inserted into the locking hole, the first turntable is locked.

[0014] Furthermore, the top of the adjusting shaft is recessed with a sliding groove; the adjusting knob is provided with a rotating arm that slides within the sliding groove; a second spring is provided between the bottom of the rotating arm and the bottom of the sliding groove; the rotating arm is provided with a clearance groove; a connecting rod is provided within the clearance groove; one end of the connecting rod is hinged to the rotating arm; the other end of the connecting rod is hinged to the inner end of the locking pin.

[0015] Furthermore, the spray head includes a nozzle and a connecting seat; the top of the connecting seat is provided with a connecting pipe; the bottom of the connecting seat is provided with a communicating groove communicating with the connecting pipe; the bottom of the connecting seat is in movable sealing contact with the top of the control valve; the connecting pipe extends upward through the top of the control box; the nozzle is connected to the top of the connecting pipe; the control valve is provided with a valve hole; when the control valve slides until the valve hole and the communicating groove are completely misaligned, the spray head is disconnected from the main pipeline.

[0016] The beneficial effects of this invention are as follows: This invention achieves automatic alternating switching of the spray head by the physical expansion of the water-absorbing resin and the mechanical transmission structure between the second turntable, the transmission slide and the control valve. It does not rely on a complex electrical control system or external sensors, has higher structural reliability, facilitates the adjustment of local humidity, effectively improves water use efficiency, helps reduce the labor and operating costs of garden landscape and nursery maintenance, and achieves flexible and efficient water-saving irrigation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the alternating irrigation device of the present invention;

[0018] Figure 2 This is a cross-sectional schematic diagram of the alternating irrigation device of the present invention buried underground and connected to the main pipeline and the spray head.

[0019] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle;

[0020] Figure 4 This is a cross-sectional schematic diagram from another perspective when the alternating irrigation device of the present invention is buried underground and connected to the main pipeline and the sprinkler head.

[0021] Figure 5 This is a cross-sectional schematic diagram of the alternating irrigation device of the present invention when it is buried underground and the main pipeline and the spray head are not connected.

[0022] Figure 6 This is a cross-sectional schematic diagram from another perspective when the alternating irrigation device of the present invention is buried underground and the main pipeline and the spray head are not connected.

[0023] Figure 7 This is a schematic diagram of the structure of the shell, the first turntable, and the second turntable of the present invention forming a fan-shaped cavity;

[0024] Figure 8 This is a schematic diagram of the transmission slide of the present invention;

[0025] Figure 9 This is a schematic diagram of the structure of the mounting plate and the elastic telescopic rod of the present invention.

[0026] Figure 10 This is a schematic diagram of the control valve of the present invention;

[0027] Figure 11 This is an exploded view of the first turntable, adjusting knob, positioning plate, locking pin, connecting rod, and second spring of the present invention.

[0028] Explanation of reference numerals in the attached drawings: 1. Main pipeline; 2. Control device; 21. Control box; 211. Box body; 212. Cover plate; 213. Capillary material layer; 214. Water-permeable membrane layer; 22. Control valve; 221. Strip groove; 222. Valve hole; 23. Transmission slide; 231. Drive groove; 232. First spring; 24. First turntable; 241. First partition plate; 242. Adjusting shaft; 243. Adjusting knob; 2431. 244. Rotary arm; 2441. Positioning plate; 2441. Locking hole; 245. Locking pin; 246. Second spring; 247. Connecting rod; 25. Second turntable; 251. Second partition plate; 26. Housing; 27. Sector cavity; 28. Rotating rod; 29. ​​Mounting plate; 291. Strip hole; 292. Elastic telescopic rod; 293. Drive pin; 3. Spray head; 31. Spray nozzle; 32. Connecting seat; 321. Connecting groove; 322. Connecting pipe. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this is not to limit the scope of the invention to this.

[0030] like Figures 1 to 11 As shown in the figure, the alternating irrigation device for landscape seedlings described in this embodiment includes a main pipeline 1, a control device 2 connected to the main pipeline 1, and a sprinkler head 3 connected to the control device 2; the main pipeline 1 is buried underground; the sprinkler head 3 is at least partially exposed on the ground surface;

[0031] The control device 2 includes a control box 21 buried underground, a control valve 22 horizontally slidably disposed within the control box 21, a transmission slide 23 vertically slidably disposed within the control box 21, and a first turntable 24 and a second turntable 25 rotatably disposed within the control box 21. A sector-shaped cavity 27 with variable volume is formed between the first turntable 24 and the second turntable 25. The sector-shaped cavity 27 is filled with water-absorbing resin, which expands after absorbing water and can push the second turntable 25 to rotate relative to the first turntable 24, thereby increasing the volume of the sector-shaped cavity 27. The transmission slide 23 is drivenly connected to the second turntable 25 so as to drive the transmission slide 23 to slide when the second turntable 25 rotates. The control valve 22 is drivenly connected to the transmission slide 23. When the transmission slide 23 slides, the control valve 22 slides relative to the control box 21, thereby controlling the on / off connection between the main pipeline 1 and the spray head 3.

[0032] Specifically, initially, such as Figure 2 and Figure 4As shown, control valve 22 connects sprinkler head 3 to main pipe 1, enabling irrigation of landscape seedlings. The water-absorbing resin in the fan-shaped cavity 27 absorbs water flowing into the soil and expands. During this expansion, the resin pushes the second turntable 25 to rotate relative to the first turntable 24, increasing the volume of the fan-shaped cavity 27. Once the soil moisture reaches a certain level, the continued expansion of the resin pushes the second turntable 25 to rotate. The second turntable 25 drives the transmission slide 23 to slide vertically downwards. During this sliding, the transmission slide 23 drives the control valve 22 to slide horizontally, disconnecting the main pipe 1 from the sprinkler head 3, thus stopping irrigation. Figure 5 and Figure 6 As shown;

[0033] As soil moisture gradually decreases, the water in the absorbent resin evaporates and shrinks, causing the transmission slide 23 to slide vertically upwards and return to its original position. The second turntable 25 rotates in the opposite direction to the first turntable 24, reducing the volume of the sector cavity 27. This continues until the water in the absorbent resin has evaporated to a certain extent. Then, the transmission slide 23 drives the control valve 22 to slide horizontally in the opposite direction, thus reconnecting the main pipe 1 with the spray head 3 for irrigation. Figure 2 and Figure 4 As shown; by utilizing the water absorption and expansion effect of the water-absorbing resin, the control valve 22 is controlled to slide horizontally through the transmission of the second turntable 25 and the transmission slide 23, thereby realizing the alternating control of the on / off state between the main pipeline 1 and the spray head 3.

[0034] This embodiment achieves automatic switching of the spray head 3 by using the physical expansion of the water-absorbing resin and the mechanical transmission structure between the second turntable 25, the transmission slide 23 and the control valve 22. It does not rely on a complex electronic control system or external sensors, has higher structural reliability, facilitates the adjustment of local humidity, effectively improves water use efficiency, and helps reduce the labor and operating costs of garden landscape and nursery maintenance, thus achieving flexible and efficient water-saving irrigation.

[0035] like Figure 2 , Figure 5 as well as Figure 7As shown, in this embodiment of the alternating irrigation device, a housing 26 is provided above the transmission slide 23 inside the control box 21; both the first turntable 24 and the second turntable 25 are located inside the housing 26; the first turntable 24 has a first partition 241 extending inside the housing 26; the second turntable 25 has a second partition 251 extending inside the housing 26; the first partition 241, the second partition 251, the housing 26, and the control box 21 together form a fan-shaped cavity 27. In this embodiment, the housing 26 is provided to facilitate the installation of the first turntable 24 and the second turntable 25; the first partition 241 and the second partition 251 are provided to facilitate the formation of the fan-shaped cavity 27; when the water-absorbing resin absorbs water and expands, the water-absorbing resin pushes the second turntable 25 to rotate through the second partition 251, thereby controlling the sliding of the control valve 22 to realize the on / off control between the main pipe 1 and the spray head 3.

[0036] like Figure 2 and Figure 5 As shown, in this embodiment of the alternating irrigation device, the control box 21 has a recessed accommodating groove at the position corresponding to the housing 26; the bottom of the accommodating groove has a through hole communicating with the fan-shaped cavity 27; a capillary material layer 213 and a water-permeable membrane layer 214 are stacked sequentially from bottom to top in the accommodating groove. In this embodiment, by setting the capillary material layer 213 and the water-permeable membrane layer 214, the water in the soil is absorbed by the water-absorbing resin through the capillary material layer 213, the water-permeable membrane layer 214 and the through hole; after the soil moisture decreases, the water in the water-absorbing resin can be gradually released into the soil under the capillary action of the capillary material layer 213, so that the volume of the water-absorbing resin is reduced, so that the control valve 22 can connect the main pipe 1 and the spray head 3, thereby automatically controlling the alternating opening and closing of the main pipe 1 and the spray head 3 according to the soil moisture.

[0037] like Figure 1 , Figure 2 as well as Figure 5 As shown, in this embodiment of the alternating irrigation device, the control box 21 includes a box body 211 and a cover plate 212 disposed on the top of the box body 211; a receiving groove is disposed on the top surface of the cover plate 212. In this embodiment, by setting the cover plate 212 and the box body 211, the control box 21 can be configured as a detachable structure to facilitate the installation of components such as the first turntable 24, the second turntable 25, the housing 26, the transmission slide 23, and the control valve 22.

[0038] like Figure 2 as well as Figure 5As shown, in this embodiment of the alternating irrigation device, a rotating rod 28 is rotatably connected through the center of the housing 26; the center of the second turntable 25 is fixedly sleeved with the upper end of the rotating rod 28; a transmission slide 23 is slidably sleeved on the outer wall of the rotating rod 28; a spiral groove is formed on the outer wall of the rotating rod 28; a locking pin is provided on the inner wall of the transmission slide 23; the locking pin is movably embedded in the spiral groove. In this embodiment, by setting the locking pin to cooperate with the spiral groove, the rotational motion of the second turntable 25 is converted into the vertical linear motion of the transmission slide 23, and the movement of the transmission slide 23 drives the control valve 22 to move.

[0039] like Figure 2 as well as Figure 5 As shown, in the alternating irrigation device of this embodiment, a first spring 232 is connected between the bottom surface of the transmission slide 23 and the inner bottom wall of the control box 21. With the above arrangement, when the water-absorbing resin absorbs water and expands, the transmission slide 23 slides vertically downward, and the first spring 232 is compressed; when the water in the water-absorbing resin gradually evaporates into the soil, the first spring 232 pushes the transmission slide 23 to return to its original position, thereby causing the rotating rod 28 to rotate in the opposite direction, which in turn drives the second turntable 25 to rotate in the opposite direction, so that the volume of the fan-shaped cavity 27 is reduced, so as to facilitate the next expansion movement of the water-absorbing resin.

[0040] like Figure 2 , Figures 4 to 10 As shown, in this embodiment of the alternating irrigation device, a mounting plate 29 is provided inside the control box 21 between the transmission slide 23 and the control valve 22; the transmission slide 23 is provided with a drive groove 231 on the side near the control valve 22, preferably, the drive groove 231 is a parallelogram structure; an elastic telescopic rod 292 is provided on the mounting plate 29; the mounting plate 29 is also provided with a strip hole 291 extending along the sliding direction of the control valve 22; a strip groove 221 is provided on the side of the control valve 22 facing the mounting plate 29; one end of the elastic telescopic rod 292 is hinged to the mounting plate 29; the other end of the elastic telescopic rod 292 is provided with a drive pin 293 that moves through the strip hole 291; one end of the drive pin 293 is movably embedded in the drive groove 231; the other end of the drive pin 293 is movably embedded in the strip groove 221.

[0041] Specifically, initially, control valve 22 connects spray head 3 to main pipe 1, and drive pin 293 abuts against one end of the groove wall of strip groove 221. When the water-absorbing resin in the fan-shaped cavity 27 absorbs water flowing into the soil and expands, the expansion of the water-absorbing resin pushes the second turntable 25 to rotate relative to the first turntable 24, making the volume of the fan-shaped cavity 27 larger. At this time, the second turntable 25 drives the rotating rod 28 to rotate. The rotating rod 28, through the spiral groove and the locking pin, drives the transmission slide 23 to slide downwards, compressing the first spring 232. During the downward sliding of the transmission slide 23, the drive pin 293 pushes the elastic extension through the upper side wall of the drive groove 231. The retractor 292 drives the drive pin 293 to swing. The drive pin 293 slides along the trajectory of the strip hole 291 and the strip groove 221. When the drive pin 293 abuts against the other end of the groove wall of the strip groove 221, the drive pin 293 passes the midpoint of its swing trajectory, and the transmission slide 23 slides into place. At this time, the drive pin 293 continues to swing under the elastic action of the elastic telescopic rod 292. The drive pin 293 continues to move along the strip hole 291. At this time, because the drive pin 293 abuts against the other end of the groove wall of the strip groove 221, when the elastic telescopic rod 292 continues to swing, it synchronously pushes the control valve 22 to slide horizontally, thereby disconnecting the connection between the main pipe 1 and the spray head 3.

[0042] As the soil moisture gradually decreases and the water-absorbing resin evaporates and shrinks, the first spring 232 pushes the transmission slide 23 to reset. The transmission slide 23 pushes the drive pin 293 along the slot 291 through the lower side wall of the drive groove 231, thereby causing the elastic telescopic rod 292 to drive the drive pin 293 to swing in the opposite direction. At this time, the drive pin 293 moves along the slot 221 but does not push the control valve 22 to move until the drive pin 293 abuts against one end of the slot wall of the slot 221 again. At this time, the drive pin 293 passes the midpoint of its swing trajectory, the transmission slide 23 resets to its original position, and the drive pin 293 continues to swing under the elastic action of the elastic telescopic rod 292, thereby pushing the control valve 22 to move in the opposite direction, connecting the main pipe 1 and the spray head 3 to ensure soil moisture.

[0043] like Figures 1 to 7 ,as well as Figure 11As shown, in this embodiment of the alternating irrigation device, the center of the first turntable 24 is provided with an adjusting shaft 242; the adjusting shaft 242 passes through the top of the control box 21, the capillary material layer 213 and the permeable membrane layer 214 in sequence; the top of the adjusting shaft 242 is elastically floatingly connected to the outside of the control box 21 with an adjusting knob 243 and a positioning plate 244 sleeved thereon, the adjusting knob 243 is exposed on the ground for operation, and the positioning plate 244 is fixed on the ground during application; the adjusting knob 243 is movably provided with a locking pin 245 inside the adjusting shaft 242; the locking pin 245 moves radially through the adjusting shaft 242; the inner wall of the positioning plate 244 is provided with a plurality of equally spaced locking holes 2441 distributed circumferentially; when the locking pin 245 is inserted into the locking hole 2441, the first turntable 24 is locked. In this embodiment of the alternating irrigation device, the top of the adjusting shaft 242 is recessed with a sliding groove; the adjusting knob 243 is provided with a rotating arm 2431 that is slidably disposed in the sliding groove; a second spring 246 is provided between the bottom of the rotating arm 2431 and the bottom of the sliding groove; the rotating arm 2431 is provided with a clearance groove; a connecting rod 247 is provided in the clearance groove; one end of the connecting rod 247 is hinged to the rotating arm 2431; the other end of the connecting rod 247 is hinged to the inner end of the locking pin 245.

[0044] Specifically, when the species of seedlings in a region are changed, the irrigation humidity of the soil area can be easily changed by adjusting the rotation, so that different seedlings can obtain suitable water and avoid the adverse effects of long-term excessive moisture or drought on plant growth. Specifically, when higher soil moisture is required, the adjustment knob 243 is pressed first. The rotating arm 2431 of the adjustment knob 243 compresses the second spring 246. During the sliding process, the rotating arm 2431 drives the locking pin 245 to retract through the connecting rod 247, thereby disengaging the locking pin 245 from the locking hole 2441. At this time, the first turntable 24 is in the unlocked state. Then, the adjustment knob 243 can be operated to rotate the first turntable 24 relative to the second turntable 25, thereby increasing the initial volume of the fan-shaped cavity 27 between the first partition 241 and the second partition 251. That is, initially, the water-absorbing resin has a larger initial expansion space, thereby delaying the timing of the transmission slide 23 driving the control valve 22 to move, so that the soil can be irrigated with enough water to prevent the soil from becoming too dry, thus meeting the seedlings' requirements for soil moisture absorption.

[0045] When a reduction in soil moisture is required, the operating principle of the adjustment knob 243 is the same as that for when a higher soil moisture is needed. However, after pressing the adjustment knob 243, it needs to be turned in the opposite direction to reduce the initial volume of the fan-shaped cavity 27 between the first partition 241 and the second partition 251. This shortens the time it takes for the transmission slide 23 to drive the control valve 22, allowing for timely closure of the connection between the main pipe 1 and the spray head 3 to prevent the soil from becoming too wet. This design further facilitates the adjustment of localized moisture levels.

[0046] like Figure 1 , Figure 2 , Figures 4 to 6 As shown, in this embodiment of the alternating irrigation device, the spray head 3 includes a spray head 31 and a connecting seat 32; the top of the connecting seat 32 is provided with a connecting pipe 322; the bottom of the connecting seat 32 is provided with a connecting groove 321 communicating with the connecting pipe 322; the bottom of the connecting seat 32 is in movable sealing contact with the top of the control valve 22; the connecting pipe 322 extends upward through the top of the control box 21; the spray head 31 is connected to the top of the connecting pipe 322; the control valve 22 is provided with a valve hole 222; when the control valve 22 slides until the valve hole 222 is completely misaligned with the connecting groove 321, the spray head 3 is disconnected from the main pipe 1. In this embodiment, a nozzle 31 and a connecting seat 32 are provided for the installation of the spray head 3. A connecting groove 321 is provided so that when the drive pin 293 slides along the strip groove 221, the main pipe 1 and the nozzle 31 can remain connected through the connecting groove 321 and the valve hole 222 until the control valve 22 slides until the valve hole 222 is completely misaligned with the connecting groove 321. At this time, the control valve 22 closes the connection between the main pipe 1 and the spray head 3, thereby controlling the spray head 3 to stop irrigation.

[0047] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included within the protection scope of this patent application.

Claims

1. An alternating irrigation device for landscape seedlings, characterized in that, Includes the main pipeline, the control device connected to the main pipeline, and the spray head connected to the control device; The control device includes a control housing, a control valve horizontally slidable within the control housing, a transmission slide vertically slidable within the control housing, and a first turntable and a second turntable rotatably disposed within the control housing. A variable-volume sector-shaped cavity is formed between the first turntable and the second turntable. The sector-shaped cavity is filled with water-absorbing resin, which expands after absorbing water and can push the second turntable to rotate relative to the first turntable, thereby increasing the volume of the sector-shaped cavity. The transmission slide is driven to the second turntable to drive the transmission slide to slide when the second turntable rotates. The control valve is driven to the transmission slide, and when the transmission slide slides, the control valve slides relative to the control housing, thereby controlling the on / off connection between the main pipeline and the spray head. The control box has a housing above the transmission slide; both the first turntable and the second turntable are located inside the housing; the first turntable has a first partition extending inside the housing; The second turntable extends a second partition within the housing; the first partition, the second partition, the housing, and the control box together form the fan-shaped cavity; A rotating rod is rotatably provided through the center of the housing; the center of the second turntable is fixedly sleeved with the upper end of the rotating rod; the transmission slide is slidably sleeved on the outer wall of the rotating rod; a spiral groove is provided on the outer wall of the rotating rod; a locking pin is provided on the inner wall of the transmission slide; the locking pin is movably embedded in the spiral groove. The control box contains a mounting plate between the transmission slide and the control valve; the transmission slide has a drive groove on the side near the control valve; the mounting plate has an elastic telescopic rod; the mounting plate also has a strip-shaped hole extending along the sliding direction of the control valve; the control valve has a strip-shaped groove on the side facing the mounting plate; one end of the elastic telescopic rod is hinged to the mounting plate; the other end of the elastic telescopic rod has a drive pin that moves through the strip-shaped hole; one end of the drive pin is movably embedded in the drive groove; the other end of the drive pin is movably embedded in the strip-shaped groove.

2. The alternating irrigation device for landscape seedlings according to claim 1, characterized in that, The control box has a recessed accommodating groove at the corresponding position of the housing; the bottom of the accommodating groove has a through hole communicating with the fan-shaped cavity; a capillary material layer and a water-permeable membrane layer are stacked sequentially from bottom to top in the accommodating groove.

3. The alternating irrigation device for landscape seedlings according to claim 2, characterized in that, The control box includes a box body and a cover plate located on the top of the box body; the receiving groove is located on the top surface of the cover plate.

4. The alternating irrigation device for landscape seedlings according to claim 3, characterized in that, A first spring connects the bottom surface of the transmission slide to the inner bottom wall of the control box.

5. The alternating irrigation device for landscape seedlings according to claim 2, characterized in that, The first turntable has an adjustment shaft protruding from its center; the adjustment shaft passes through the top of the control box, the capillary material layer, and the water-permeable membrane layer in sequence; an adjustment knob and a positioning plate are elastically floatingly connected to the top of the adjustment shaft outside the control box; a locking pin is movably provided inside the adjustment shaft; the locking pin moves radially through the adjustment shaft; the inner wall of the positioning plate has multiple equally spaced locking holes distributed circumferentially; when the locking pin is inserted into the locking hole, the first turntable is locked.

6. The alternating irrigation device for landscape seedlings according to claim 5, characterized in that, The top of the adjusting shaft is recessed with a sliding groove; the adjusting knob is provided with a rotating arm that slides within the sliding groove; a second spring is provided between the bottom of the rotating arm and the bottom of the sliding groove; the rotating arm is provided with a clearance groove; a connecting rod is provided within the clearance groove; one end of the connecting rod is hinged to the rotating arm; the other end of the connecting rod is hinged to the inner end of the locking pin.

7. The alternating irrigation device for landscape seedlings according to claim 1, characterized in that, The spray head includes a nozzle and a connecting seat; the top of the connecting seat is provided with a connecting pipe; the bottom of the connecting seat is provided with a connecting groove communicating with the connecting pipe; the bottom of the connecting seat is in movable sealing contact with the top of the control valve; the connecting pipe extends upward through the top of the control box; the nozzle is connected to the top of the connecting pipe; the control valve is provided with a valve hole; when the control valve slides until the valve hole and the connecting groove are completely misaligned, the spray head is disconnected from the main pipeline.

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