Automatic drip irrigation equipment for park greening maintenance

Abstract

The application relates to the technical field of garden maintenance, in particular to an automatic drip irrigation equipment for park greening maintenance, which comprises a main pipeline uniformly provided with drip irrigation heads and a water supply unit; a communication unit is arranged at the connection position of the main pipeline and the water supply unit; when the communication unit is opened, the main pipeline and the water supply unit are communicated; when the communication unit is closed, the main pipeline and the water supply unit are disconnected; a water collecting tank with an opening in the upper portion is arranged at one side of the communication unit; the water collecting tank is used for collecting external rainwater; a floating plate moving along the vertical direction is arranged in the water collecting tank; the floating plate is synchronously lifted with the liquid level in the water collecting tank; the floating plate has the highest position and the lowest position in the moving stroke in the vertical direction; when the floating plate is at the lowest position, the communication unit is opened; after the rainwater enters the water collecting tank, the floating plate is lifted under the action of the buoyancy; and the communication unit is gradually closed. The application reduces the use cost, and the planting of green plants is not influenced by the equipment size.

Description

Technical Field

[0001] This invention relates to the field of landscape maintenance technology, specifically to an automatic drip irrigation device for park greening maintenance. Background Technology

[0002] Currently, drip irrigation systems used for greening maintenance employ various types of sensors to detect soil and equipment, thereby controlling the water pump to automatically irrigate the greening. This method of controlling the pump's start and stop is controlled by the sensors, which are prone to aging or damage from external forces, causing the drip irrigation system to malfunction.

[0003] Chinese patent CN218163869U discloses an automatic drip irrigation system for greening maintenance, including a foundation, a greening pool located on the inner side of the top of the foundation, and a greening basin placed inside the greening pool, the bottom of which is connected to the inner side of the greening pool. The system also includes: a water pump fixed to the top of the foundation on the side away from the greening pool; a control pool located inside the greening pool near the water pump, the top of which is connected to the greening pool, and a sliding roller fixedly connected to the center of the bottom surface of the control pool; a float located inside the control pool, with a transmission wire fixedly connected to its bottom surface, the end of which extends through the inner side of the sliding roller to the outer side of the greening pool; and a control box fixed above the water pump on the outer wall of the foundation, the bottom of which is electrically connected to the water pump, and the top of the float being drively connected to the end of the transmission wire extending to the outer side of the greening pool.

[0004] The above solution controls the drip irrigation volume of the drip irrigation head through a transmission wire and a float ring. However, external rainwater can also affect the height of the float ring. The above solution has limitations on the distribution of greenery, that is, the planting area of ​​greenery is directly affected by the equipment. This is because greenery needs to be planted on the ground, which is costly. In addition, the above solution has limitations in use. The control pool is directly connected to the ground foundation, which can easily lead to soil mixing into the control pool. The soil mixed into the control pool will adhere to the transmission wire, causing the movement of the transmission wire to be obstructed. Summary of the Invention

[0005] To address the aforementioned problems, an automatic drip irrigation device for park greening maintenance is provided. An opening is provided at the top of the water collection tank, allowing rainwater to flow into the tank. As rainwater continuously flows in, the water level rises, gradually contacting and supporting a floating plate, causing it to rise. A connecting unit is provided between the main pipeline and the water supply unit. This connecting unit contains a vertically moving connecting block. The opening and closing of the connecting unit is achieved by the raising and lowering of the connecting block, which always moves in the opposite direction to the floating plate. That is, when the floating plate rises, it is raining; when the connecting block falls, the connecting unit is closed, and the water supply unit does not supply water to the main pipeline. After the rain stops, the floating board gradually descends due to the evaporation of water in the collection tank, causing the connecting block to gradually rise. The connecting unit fully opens after the connecting block reaches its highest position. Because the collection tank has an opening at the top, the water in the collection tank can evaporate from it. Within the same area, i.e., the entire park green area, the amount of water vapor evaporation will not vary significantly. The evaporation in the collection tank can represent the amount of water vapor evaporation in the park soil. As the water in the collection tank evaporates, the floating board gradually descends, and the corresponding connecting unit gradually opens. Once the connecting unit is fully open, the water supply unit starts supplying water. This enables automatic drip irrigation of the park green area without relying on weather monitoring equipment and hygrometers, reducing operating costs. Furthermore, the planting of greenery is not affected by the size of the equipment.

[0006] To address the problems of existing technologies, this invention provides an automatic drip irrigation device for park greening maintenance, comprising a main pipeline with drip irrigation heads evenly distributed and a water supply unit connected to the main pipeline; a connecting unit is provided at the connection between the main pipeline and the water supply unit. When the connecting unit is open, the main pipeline is connected to the water supply unit; when the connecting unit is closed, the main pipeline is disconnected from the water supply unit. A water collection tank with an opening at the top is provided on one side of the connecting unit. The water collection tank is used to collect rainwater from the outside, and a floating plate that moves vertically is provided inside the water collection tank. The floating plate rises and falls synchronously with the liquid level in the water collection tank. During its vertical movement, the floating plate has a highest position and a lowest position. When the floating plate is at the lowest position, the connecting unit is open. After rainwater enters the water collection tank, the floating plate rises under the action of buoyancy, and the connecting unit gradually closes.

[0007] Preferably, the connecting unit includes a connecting shell with a first connecting hole horizontally extending through it, and a connecting block slidingly disposed in the connecting shell in the vertical direction. When the floating plate rises, the connecting block descends; when the floating plate descends, the connecting block rises. A second connecting hole is horizontally extending through the connecting block. When the floating plate descends to its lowest position, the connecting block rises to its highest position, and the first connecting hole and the second connecting hole are completely connected.

[0008] Preferably, an overflow outlet is provided on the side wall of the water collection tank, and the overflow outlet is connected to the water supply unit. Excess water in the water collection tank flows into the water supply unit through the overflow outlet.

[0009] Preferably, a transmission unit is provided between the connecting block and the floating plate. When the floating plate rises, the floating plate drives the connecting block to descend through the transmission unit. When the floating plate descends, the floating plate drives the connecting block to rise through the transmission unit.

[0010] Preferably, the transmission unit includes a first lifting frame fixedly mounted on the floating plate, a second lifting frame fixedly mounted on the upper part of the connecting block, and a gear rotatably mounted between the first and second lifting frames. The first lifting frame has evenly distributed meshing teeth on the side facing the gear, and the second lifting frame has evenly distributed meshing teeth on the side facing the gear. The gear meshes with the first and second lifting frames respectively.

[0011] Preferably, the water supply unit includes a water pump connected to the main pipeline. The water pump can supply water into the main pipeline through the connecting unit. The first button is located on the upper part of the connecting shell. When the connecting block rises to the highest position, the connecting block presses the first button. After the first button is pressed, the water pump is activated.

[0012] Preferably, a sponge is provided at the opening of the water collection tank to seal the opening. After the opening of the water collection tank is sealed by the sponge, a water collection cavity is formed in the water collection tank.

[0013] Preferably, a baffle is provided at the top of the sponge, and the upper part of the baffle is an inclined structure.

[0014] Preferably, a switch valve is provided on the side wall of the water collection tank, and a second button is located at the bottom of the connecting shell. On sunny days, the switch valve is in the open state, and the switch valve injects water into the water collection tank. The connecting block moves from the highest position to the lowest position. When the connecting block moves to the lowest position, the second button is triggered, and the switch valve is activated and closed.

[0015] Preferably, a vent is provided at the upper part of the first connecting hole.

[0016] The advantages of this invention compared to the prior art are:

[0017] This invention features an opening at the top of a water collection tank. Rainwater from outside flows into the tank through this opening. As rainwater continuously flows in, the water level rises, gradually contacting and supporting a floating plate. The floating plate then rises. A connecting unit is located between the main pipeline and the water supply unit. This connecting unit contains a vertically moving connecting block. The opening and closing of the connecting unit is achieved by the raising and lowering of the connecting block, which is always opposite to the raising and lowering direction of the floating plate. That is, when the floating plate rises, it is raining; when the connecting block falls, the connecting unit is closed, and the water supply unit stops supplying water to the main pipeline. After the rain stops, the floating plate, due to the collected rainwater, rises. As the water in the tank evaporates and gradually decreases, the connecting block gradually rises. The connecting unit fully opens after the connecting block reaches its highest position. Because the water collection tank has an opening at the top, the water in the tank can evaporate from within it. Within the same area, i.e., the entire park green area, the amount of water vapor evaporation does not vary significantly. The evaporation in the water collection tank represents the amount of water vapor evaporating from the park soil. When the water in the water collection tank evaporates, the floating plate gradually descends, and the corresponding connecting unit gradually opens. Once the connecting unit is fully open, the water supply unit starts supplying water. This achieves automatic drip irrigation for the park green area without relying on weather monitoring equipment and hygrometers, reducing operating costs. Furthermore, the planting of greenery is not affected by the size of the equipment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of an automatic drip irrigation device used for park greening maintenance.

[0019] Figure 2 It is an automatic drip irrigation device used for park greening maintenance. Figure 1 A magnified view of a portion of point A in the middle.

[0020] Figure 3 This is a side view of an automatic drip irrigation device used for park greening maintenance.

[0021] Figure 4 It is an automatic drip irrigation device used for park greening maintenance. Figure 3 Schematic diagram of cross-section at point BB.

[0022] Figure 5 This is a cross-sectional three-dimensional schematic diagram of an automatic drip irrigation device used for park greening maintenance.

[0023] Figure 6 It is an automatic drip irrigation device used for park greening maintenance. Figure 5 A magnified view of a portion of point C.

[0024] Figure 7It is an automatic drip irrigation device used for park greening maintenance. Figure 5 A magnified view of a portion of point D.

[0025] Figure 8 This is a three-dimensional diagram of an automatic drip irrigation system for park greening maintenance, with the main pipeline and drip heads removed.

[0026] Figure 9 This is a cross-sectional three-dimensional diagram of an automatic drip irrigation device used for park greening maintenance, showing the connected block rising to its highest position.

[0027] The numbers on the map are:

[0028] 1. Main pipe; 11. Drip irrigation head; 2. Water supply unit; 21. Water pump; 22. First button; 23. Water supply tank; 3. Connecting unit; 31. Connecting shell; 311. First connecting hole; 312. Vent hole; 32. Connecting block; 321. Second connecting hole; 4. Water collection tank; 41. Floating plate; 42. Overflow outlet; 43. Sponge; 44. Baffle frame; 45. Switch valve; 46. Second button; 5. Transmission unit; 51. First lifting frame; 52. Second lifting frame; 53. Gear. Detailed Implementation

[0029] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figure 1 and Figure 4 An automatic drip irrigation device for park greening maintenance includes a main pipeline 1 with drip irrigation heads 11 evenly distributed and a water supply unit 2 connected to the main pipeline 1; a connecting unit 3 is provided at the connection between the main pipeline 1 and the water supply unit 2. When the connecting unit 3 is open, the main pipeline 1 is connected to the water supply unit 2; when the connecting unit 3 is closed, the main pipeline 1 is disconnected from the water supply unit 2. A water collection tank 4 with an opening at the top is provided on one side of the connecting unit 3. The water collection tank 4 is used to collect rainwater from the outside. A floating plate 41 that moves vertically is provided in the water collection tank 4. The floating plate 41 rises and falls synchronously with the liquid level in the water collection tank 4. The floating plate 41 has a highest position and a lowest position during its vertical movement. When the floating plate 41 is at the lowest position, the connecting unit 3 is opened. After the rainwater enters the water collection tank 4, the floating plate 41 rises under the action of buoyancy, and the connecting unit 3 gradually closes.

[0031] The main irrigation canal 1 meanders along the park's green areas, and multiple drip irrigation heads 11 are evenly distributed along its extension. Water supply unit 2 supplies water to the main irrigation canal 1. When drip irrigating the park's green areas using the drip irrigation heads 11, it is necessary to determine the external weather and soil dryness. However, monitoring the external weather relies heavily on weather monitoring equipment. A signal receiver is installed in water supply unit 2, transmitting signals to it via a network. That is, water supply unit 2 stops supplying water on rainy days and starts supplying water on sunny days. However, the supply varies throughout the year. The evaporation rate of water varies with the temperature of the day, necessitating the use of hygrometers in the soil for accurate monitoring of soil moisture. However, this invention eliminates the need for weather monitoring equipment and hygrometers. The specific working principle is as follows: An opening is provided at the top of the water collection tank 4, allowing rainwater to flow into the tank. As rainwater continuously flows into the tank, the water level rises. The rising water level gradually contacts the floating plate 41, lifting it and causing it to rise. A [further details about the invention are missing here, likely due to an error in the original text]. The connecting unit 3 contains a vertically movable connecting block 32. The opening and closing of the connecting unit 3 is achieved by the raising and lowering of the connecting block 32. The raising and lowering direction of the connecting block 32 is always opposite to that of the floating plate 41. That is, when the floating plate 41 rises, it is raining outside, the connecting block 32 descends, and the connecting unit 3 is closed, so the water supply unit 2 does not supply water to the main pipeline 1. After the rain stops, the floating plate 41 gradually descends due to the evaporation of water in the water collection tank 4, thus causing the connecting block 32 to gradually rise. The connecting unit 3 fully opens after the connecting block 32 reaches its highest position. The water tank 4 has an opening at the top, allowing water in the collection tank 4 to evaporate. Within the same area, i.e. the entire park green area, the evaporation rate of water vapor will not vary significantly. The evaporation rate in the collection tank 4 represents the evaporation rate of water vapor in the park soil. When the water in the collection tank 4 evaporates, the floating plate 41 gradually descends, and the corresponding connecting unit 3 gradually opens. When the connecting unit 3 is fully open, the water supply unit 2 starts supplying water, thus achieving automatic drip irrigation for the park green area without relying on weather monitoring equipment and hygrometers, reducing operating costs. Furthermore, the planting of green plants is not affected by the size of the equipment.

[0032] Reference Figure 6 and Figure 9The connecting unit 3 includes a connecting shell 31 with a first connecting hole 311 horizontally extending through it. A connecting block 32 is slidably disposed in the connecting shell 31 along the vertical direction. When the floating plate 41 rises, the connecting block 32 falls. When the floating plate 41 falls, the connecting block 32 rises. A second connecting hole 321 is horizontally extending through the connecting block 32. When the floating plate 41 falls to the lowest position, the connecting block 32 rises to the highest position, and the first connecting hole 311 and the second connecting hole 321 are completely connected.

[0033] The first connecting hole 311 completely penetrates the two opposite sidewalls of the connecting shell 31, thus forming two first connecting holes 311 on the sidewalls of the connecting shell 31. The axes of the two first connecting holes 311 are collinear. The main pipeline 1 is connected to one of the first connecting holes 311 on the connecting shell 31, and the other first connecting hole 311 is connected to the water supply unit 2. When it rains, rainwater flows into the water collection tank 4, and the water level in the water collection tank 4 gradually rises. As the water in the water collection tank 4 rises, it drives the floating plate 41 to rise synchronously. When the floating plate 41 rises vertically, the connecting block 32 located in the connecting shell 31 descends vertically. The connecting block 32 also has a highest position and a lowest position when it moves in the connecting shell 31. When the connecting block 32 is at the highest position, the first connecting hole 311 and the second connecting hole 321 are connected. When the connecting block 32 is at its lowest position, the first connecting hole 311 and the second connecting hole 321 are intersected. The connecting block 32 blocks the first connecting hole 311 on the connecting shell 31. At this time, the water supply unit 2 cannot supply water to the main pipeline 1, which avoids the drip head still being in drip irrigation state on rainy days. It also avoids the need to use additional weather monitoring equipment to monitor the weather, reducing the cost of use and the cost of later maintenance. When it stops raining and the temperature continues to rise, the water in the water collection tank 4 gradually evaporates, and the water level in the water collection tank 4 drops. The floating plate 41 drops synchronously with the liquid level. In this way, the connecting block 32 located in the connecting shell 31 rises vertically. When the connecting block 32 rises to the highest position, the first connecting hole 311 and the second connecting hole 321 are connected, and the water supply unit 2 can supply water to the main pipeline 1 normally.

[0034] Reference Figure 7 An overflow outlet 42 is provided on the side wall of the water collection tank 4. The overflow outlet 42 is connected to the water supply unit 2. Excess water in the water collection tank 4 flows into the water supply unit 2 through the overflow outlet 42.

[0035] During the rainy season, rainwater continuously falls into the water collection tank 4, and the water in the water collection tank 4 continues to increase. If an overflow outlet 42 is not provided, when the water collection tank 4 is full, the excess water will overflow from the top of the water collection tank 4, resulting in a waste of water resources. In order to avoid the above situation, an overflow outlet 42 is opened on the side wall of the water collection tank 4, so that the excess water in the water collection tank 4 flows into the water supply unit 2. The water flowing into the water supply unit 2 can supply water to the drip irrigation head 11, thereby realizing the recycling of water resources.

[0036] Reference Figure 3 and Figure 4 A transmission unit 5 is provided between the connecting block 32 and the floating plate 41. When the floating plate 41 rises, the floating plate 41 drives the connecting block 32 to fall through the transmission unit 5. When the floating plate 41 falls, the floating plate 41 drives the connecting block 32 to rise through the transmission unit 5.

[0037] As mentioned above, the float plate 41 has a highest and lowest position during its vertical movement, and the connecting block 32 also has a highest and lowest position when sliding in the connecting shell 31. Under the transmission action of the transmission unit 5, when the float plate 41 rises vertically, the connecting block 32 descends vertically; when the float plate 41 descends vertically, the connecting block 32 rises vertically. When the float plate 41 is at its highest position during its movement, the water in the water collection tank 4 overflows from the overflow port 42, and the connecting block 32 is at its lowest position. The second connecting hole 321 on the connecting block 32 is offset from the first connecting hole 311 on the connecting shell 31. When the floating plate 41 is at its lowest position, the water in the water collection tank 4 is about to dry up, indicating that the soil moisture outside is low. At this time, the connecting block 32 is at its highest position, and the second connecting hole 321 on the connecting block 32 and the first connecting hole 311 on the connecting shell 31 overlap and connect with each other. When the water supply unit 2 is started, the water can flow smoothly through the first connecting hole 311 and the second connecting hole 321 into the main pipeline 1, thus realizing the water supply to the drip head.

[0038] Reference Figures 3-5 , Figure 8 and Figure 9 The transmission unit 5 includes a first lifting frame 51 fixedly mounted on the floating plate 41, a second lifting frame 52 fixedly mounted on the upper part of the connecting block 32, and a gear 53 rotatably mounted between the first lifting frame 51 and the second lifting frame 52. The first lifting frame 51 has evenly distributed meshing teeth on the side facing the gear 53, and the second lifting frame 52 has evenly distributed meshing teeth on the side facing the gear 53. The gear 53 meshes with the first lifting frame 51 and the second lifting frame 52 respectively.

[0039] When the floating plate 41 rises under the action of buoyancy, the floating plate 41 drives the first lifting frame 51, which is fixedly connected to the floating plate 41, to rise. Under the transmission of the gear 53, the second lifting frame 52 descends in the vertical direction. Thus, when the floating plate 41 rises, the connecting block 32 descends; when the floating plate 41 descends, the connecting block 32 rises.

[0040] Reference Figure 6 and Figure 8 The water supply unit 2 includes a water pump 21 connected to the main pipeline 1. The water pump 21 can supply water into the main pipeline 1 through the connecting unit 3. The first button 22 is located on the upper part of the connecting shell 31. When the connecting block 32 rises to the highest position, the connecting block 32 presses the first button 22. After the first button 22 is pressed, the water pump 21 is activated.

[0041] A water supply tank 23 is installed at the overflow outlet 42 to receive the water overflowing from the outlet 42. A water pump 21 is installed on the side wall of the water supply tank 23 and pumps water from the tank into the main pipeline 1. When the first button 22 is pressed, the first connecting hole 311 and the second connecting hole 321 are fully connected. As the connecting block 32 rises, the first connecting hole 311 and the second connecting hole 321 will intersect and then completely overlap. If the water pump 21 starts when the first connecting hole 311 and the second connecting hole 321 intersect, the water pressure supplied to the main pipeline 1 may be unstable. This is because the overlap between the first connecting hole 311 and the second connecting hole 321 gradually increases as the connecting block 32 rises. The first button 22 is triggered only when the connecting block 32 reaches its highest position, thus avoiding the above situation. The water pump 21 stops after running for the rated time after activation.

[0042] Reference Figure 2 A sponge 43 is installed at the opening of the water collection tank 4. The sponge 43 seals the opening, and a water collection cavity is formed in the water collection tank 4 after the opening of the water collection tank 4 is sealed by the sponge 43.

[0043] A sponge 43 is placed at the opening of the water collection tank 4 to form a water collection cavity in the water collection tank 4. The main purpose is to prevent the water in the water collection tank 4 from evaporating too quickly. This is because the water in the soil is also subject to the resistance of the soil when it evaporates. If the opening of the water collection tank 4 is open, the evaporation rate of the water in the water collection tank 4 will be greater than the evaporation rate of the water in the park green soil. Placing a sponge 43 at the opening of the water collection tank 4 can simulate the evaporation rate of water in the soil. This avoids the use of a soil moisture meter, reduces the cost of use, and the sponge 43 is permeable, so rainwater from the outside can flow into the water collection tank 4 through the sponge 43.

[0044] Reference Figure 2A blocking frame 44 is provided on the top of the sponge 43, and the upper part of the blocking frame 44 is an inclined structure.

[0045] The baffle 44 prevents fallen leaves from covering the top of the sponge 43, thus preventing rainwater from flowing smoothly into the water collection tank 4. At the same time, the water vapor evaporating in the water collection tank 4 cannot be released through the sponge 43. The baffle 44 on the sponge 43 can prevent the above situation from occurring, ensuring that rainwater can smoothly enter the water collection tank 4 through the sponge 43, and the water vapor evaporating in the water collection tank 4 can also be smoothly released through the sponge 43.

[0046] Reference Figure 1 and Figure 6 A switch valve 45 is installed on the side wall of the water collection tank 4, and a second button 46 is located at the bottom of the connecting shell 31. On sunny days, the switch valve 45 is in the open state, and the switch valve 45 injects water into the water collection tank 4. The connecting block 32 moves from the highest position to the lowest position. When the connecting block 32 moves to the lowest position, the second button 46 is triggered, and the switch valve 45 is activated and closed.

[0047] When the first button 22 is triggered by the connecting block 32, the switch valve 45 opens, injecting water into the water collection tank 4 through the switch valve 45. When the water collection tank 4 is full, that is, when the connecting block 32 in the connecting shell 31 drops to its lowest position, the second button 46 is triggered, and the switch valve 45 closes. At this time, the water in the water collection tank 4 continues to evaporate. As the water evaporates, the water level in the water collection tank 4 gradually drops, while the connecting block 32 in the connecting shell 31 rises. When the connecting block 32 rises to its highest position, the first button 22 is triggered, the switch valve 45 opens again, and at the same time, the water pump 21 in the water supply unit 2 also starts, supplying water to the main pipeline 1. In this way, automatic drip irrigation is realized, while also avoiding the situation where the plants are drowned due to excessive water supply.

[0048] Reference Figure 8 A vent 312 is provided at the upper part of the first connecting hole 311.

[0049] By opening a vent 312 at the top of the first connecting hole 311, the air inside the connecting shell 31 can be smoothly discharged, thereby ensuring that the connecting block 32 can move smoothly in the connecting shell 31.

[0050] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present 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 all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. An automatic drip irrigation equipment for park greening maintenance, comprising a main pipeline (1) uniformly provided with drip irrigation heads (11) and a water supply unit (2) in communication with the main pipeline (1); a communication unit (3) is arranged at the connection between the main pipeline (1) and the water supply unit (2), when the communication unit (3) is opened, the main pipeline (1) is in communication with the water supply unit (2), when the communication unit (3) is closed, the main pipeline (1) is disconnected from the water supply unit (2), a water collecting tank (4) with an opening in the upper part is arranged on one side of the communication unit (3), the water collecting tank (4) is used for collecting rainwater from the outside, and a floating plate (41) moving in the vertical direction is arranged in the water collecting tank (4), the floating plate (41) rises and falls synchronously with the liquid level in the water collecting tank (4), the floating plate (41) has a highest position and a lowest position in the moving stroke in the vertical direction, when the floating plate (41) is at the lowest position, the communication unit (3) is opened, after the rainwater enters the water collecting tank (4), the floating plate (41) is lifted by the buoyancy, and the communication unit (3) is gradually closed; characterized in that the communication unit (3) comprises a communication shell (31) provided with a first communication hole (311) penetrating in the horizontal direction, and a communication block (32) sliding in the vertical direction is arranged in the communication shell (31), when the floating plate (41) rises, the communication block (32) descends, and when the floating plate (41) descends, the communication block (32) rises, the communication block (32) is provided with a second communication hole (321) penetrating in the horizontal direction, when the floating plate (41) descends to the lowest position, the communication block (32) rises to the highest position, and the first communication hole (311) and the second communication hole (321) are completely communicated; a transmission unit (5) is arranged between the communication block (32) and the floating plate (41), when the floating plate (41) rises, the floating plate (41) drives the communication block (32) to descend through the transmission unit (5), and when the floating plate (41) descends, the floating plate (41) drives the communication block (32) to rise through the transmission unit (5); the transmission unit (5) comprises a first lifting frame (51) fixedly arranged on the floating plate (41), a second lifting frame (52) fixedly arranged on the upper part of the communication block (32), and a gear (53) rotatably arranged between the first lifting frame (51) and the second lifting frame (52), the side of the first lifting frame (51) facing the gear (53) is uniformly provided with meshing teeth, the side of the second lifting frame (52) facing the gear (53) is uniformly provided with meshing teeth, and the gear (53) is meshed with the first lifting frame (51) and the second lifting frame (52) respectively; the water supply unit (2) comprises a water pump (21) in communication with the main pipeline (1), the water pump (21) can supply water into the main pipeline (1) through the communication unit (3), a first button (22) is arranged on the upper part of the communication shell (31), when the communication block (32) rises to the highest position, the communication block (32) presses the first button (22), and after the first button (22) is pressed, the water pump (21) is activated. ​ 2. The automatic drip irrigation equipment for park greening maintenance according to claim 1, characterized in that, An overflow outlet (42) is formed on the side wall of the water collecting tank (4), the overflow outlet (42) is communicated with the water supply unit (2), and the excess water in the water collecting tank (4) flows into the water supply unit (2) through the overflow outlet (42).

3. The automatic drip irrigation equipment for park greening maintenance according to claim 1, characterized in that, A sponge (43) is arranged at the opening of the water collecting tank (4), the sponge (43) blocks the opening, and a water collecting cavity is formed in the water collecting tank (4) after the opening of the water collecting tank (4) is blocked by the sponge (43).

4. The automatic drip irrigation equipment for park greening maintenance according to claim 3, characterized in that, A blocking frame (44) is arranged at the top of the sponge (43), and the upper portion of the blocking frame (44) is in an inclined structure.

5. The automatic drip irrigation equipment for park greening maintenance according to claim 1, characterized in that, A switch valve (45) is arranged on the side wall of the water collecting tank (4), and a second button (46) is arranged at the bottom of the communication shell (31); in sunny days, the switch valve (45) is in an open state, the switch valve (45) injects water into the water collecting tank (4), the communication block (32) moves from the highest position to the lowest position, and the second button (46) is triggered when the communication block (32) moves to the lowest position, and the switch valve (45) is activated to be closed.

6. The automatic drip irrigation equipment for park greening maintenance according to claim 1, characterized in that, An air hole (312) is formed at the upper portion of the first communication hole (311).

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