Siphon drainage system and method for automatic irrigation of slope drainage and green plants

Abstract

The application discloses a siphon drainage system and method for automatic irrigation of slope drainage and green plants, which comprises a siphon pipe, a drainage pipe and an irrigation pipe. The siphon pipe comprises a first pipe section extending into a slope inclined borehole, a second pipe section extending into a water storage pool and a third pipe section connecting the first pipe section and the second pipe section. The drainage pipe is connected to the water storage pool and a highway blind drain. A first control valve for controlling the on-off of the drainage pipe is arranged on the drainage pipe. The irrigation pipe is arranged to face the slope and has a lower end extending into the water storage pool. A second control valve for controlling the on-off of the irrigation pipe is arranged on the irrigation pipe. The lower end of the irrigation pipe is above the drainage pipe. The vertical height of the first pipe section is less than the water column height corresponding to the local atmospheric pressure. The vertical height of the irrigation pipe is less than the water column height corresponding to the local atmospheric pressure. The water in the water storage pool can be absorbed into the irrigation pipe by using the water level difference, and the green plants on the slope surface can be automatically irrigated, so that the labor intensity is reduced and the water resources are protected.

Description

Technical Field

[0001] This invention belongs to the field of slope protection technology, and in particular relates to a siphon drainage system and method for slope drainage and automatic irrigation of green plants. Background Technology

[0002] To ensure roadbed stability, slopes with a certain gradient are typically constructed on both sides of the roadbed, and slope greening can be carried out on these slopes. Slope greening technology mainly involves using spray mixing machinery to mix soil, fertilizer, organic matter, water-retaining materials, binders, and plant seeds with water, then spraying this mixture onto the slope to form a 10cm thick, continuously porous, hardened layer. From germination to seedling stage, the plant seeds require watering to maintain soil moisture. Watering frequency can be once a day in the morning, although in hot summers it may need to be twice a day, morning and evening. Currently, watering mainly relies on maintenance personnel manually irrigating the plants on the slope using water trucks. This method not only leads to high labor intensity but also consumes a large amount of water, which is detrimental to water resource conservation. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies of the prior art, the present invention provides a siphon drainage system and method for slope drainage and automatic irrigation of green plants, aiming to solve the technical problems that the existing watering and maintenance methods for slope green plants not only lead to high labor intensity, but are also detrimental to water resource protection.

[0004] To achieve the above objectives, the present invention provides a siphon drainage system for slope drainage and automatic irrigation of vegetation. The siphon drainage system includes a siphon pipe, a drainage pipe, and an irrigation pipe. The siphon pipe includes a first pipe section extending into an inclined borehole in the slope, a second pipe section extending into a reservoir located between a road ditch and the slope, and a third pipe section connecting the first and second pipe sections. The drainage pipe connects the reservoir and the road ditch, and is equipped with a first control valve to control the flow of the drainage pipe. The irrigation pipe faces the slope and extends its lower end into the reservoir. It is equipped with a second control valve to control the flow of the irrigation pipe, and its lower end is located above the drainage pipe. The vertical height of the first pipe section and the irrigation pipe are both set to be less than the water column height corresponding to the local atmospheric pressure.

[0005] In this embodiment of the invention, the irrigation pipe includes a fourth pipe section for extending into the water storage tank and a fifth pipe section for being set on the slope facing the slope. A second control valve is set at one end of the fifth pipe section near the fourth pipe section. The pipe opening at the end of the fourth pipe section away from the fifth pipe section is located above the drainage pipe. Multiple irrigation ports are opened on the fifth pipe section.

[0006] In this embodiment of the invention, the siphon drainage system further includes a linkage device, which includes a sealing element for covering the lower end of the irrigation pipe and a float for placing in the water storage tank. The float is positioned facing the sealing element and is used to abut against the sealing element to control the sealing element to open the lower end of the pipe.

[0007] In this embodiment of the invention, the sealing element includes an elastic element and a sealing plate that seals the lower end of the irrigation pipe under the elastic force of the elastic element. The sealing plate is movably hinged to the irrigation pipe, and one end of the sealing plate extends laterally from the lower end of the pipe and is positioned opposite to the float.

[0008] In this embodiment of the invention, the linkage device further includes a water container connected to the upper end of the irrigation pipe via a water inlet pipe, and a float connected to the water container and used to support the water container under the action of buoyancy.

[0009] In this embodiment of the invention, the water container includes a hollow outer shell for being installed on a sealing cover of a water storage tank, and a linkage plate that is fitted to the inner wall of the hollow outer shell and can be raised and lowered inside the hollow outer shell. The upper end of the water inlet pipe away from the irrigation pipe is guided above the linkage plate. A connecting rod is provided on the side of the float facing the linkage plate. The connecting rod is used to pass through the sealing cover and connect to the linkage plate through the lifting port opened on the sealing cover. The hollow outer shell is also provided with a drain outlet near the sealing cover.

[0010] In this embodiment of the invention, the linkage device further includes a stop plate disposed on the side of the float facing the drain pipe and used to fit against the wall of the water storage tank. The stop plate is provided with a water passage hole for communicating with the drain pipe.

[0011] In this embodiment of the invention, the drainage capacity of the drain pipe is set to be no less than the replenishment capacity of the siphon pipe; and / or, the drainage capacity of the irrigation pipe is set to be less than the replenishment capacity of the siphon pipe.

[0012] In this embodiment of the invention, the inner diameter of the siphon tube is 3mm to 6mm, and the number of siphon tubes is less than 600.

[0013] To achieve the above objectives, the present invention also provides a siphon drainage method for slope drainage and automatic irrigation of vegetation, applied to the siphon drainage system for slope drainage and automatic irrigation of vegetation as described above, wherein:

[0014] An inclined borehole is drilled inside the upper end of the slope, wherein the inclined borehole is set upwards from the inside of the slope toward the slope surface.

[0015] A burial channel is excavated below the slope surface. One end of the burial channel is connected to the end of the inclined borehole that is close to the slope surface, and the other end of the burial channel is inclined downwards towards the side away from the inclined borehole.

[0016] A water storage tank is installed between the blind ditch and the slope of the highway;

[0017] The first, third, and second sections of the siphon pipe are placed one-to-one in the inclined borehole, the buried channel, and the reservoir.

[0018] Drainage pipes are installed between the reservoir and the blind ditch along the road, and irrigation pipes are installed on the reservoir.

[0019] The first control valve is opened to allow the water in the reservoir to drain into the road blind ditch via the drainage pipe.

[0020] The first control valve is closed to raise the water level in the reservoir to the lower end of the irrigation pipe.

[0021] The second control valve is opened to allow water from the reservoir to enter the irrigation pipe and spray water onto the vegetation on the slope.

[0022] Through the above technical solution, the siphon drainage system for slope drainage and automatic irrigation of green plants provided in the embodiments of the present invention has the following beneficial effects:

[0023] When using the aforementioned siphon drainage system, the siphon pipe, with its vertical height set below the water column height corresponding to the local atmospheric pressure, allows groundwater from the inclined borehole to be drawn into a reservoir using siphon action. After the first control valve is opened, the water in the reservoir flows through the drainage pipe into the road blind ditch for slope groundwater drainage. When irrigation of vegetation on the slope is needed, the first control valve can be closed, causing the water level in the reservoir to rise to and submerge the lower end of the irrigation pipe. Due to the vertical... If the height is set to be less than the water column height corresponding to the local atmospheric pressure, then after the second control valve is opened, the water stored in the reservoir can be drawn into the irrigation pipe by the water level difference to automatically irrigate the green plants on the slope, thereby reducing labor intensity. At the same time, this invention uses the siphon drainage principle to utilize the excess groundwater inside the slope to irrigate the green plants on the slope, ensuring the safety and stability of the slope while improving the utilization rate of groundwater, thus achieving the purpose of water resource protection. In addition, this irrigation method does not require other power and equipment, making it low-carbon and energy-saving.

[0024] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0025] The accompanying drawings are provided to illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of a siphon drainage system according to an embodiment of the present invention;

[0027] Figure 2 This is a partial structural schematic diagram of a linkage device according to an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures

[0029] 1. Siphon pipe 11. First pipe section

[0030] 12 Second Pipe Section 13 Third Pipe Section

[0031] 2 Drain pipe 21 First control valve

[0032] 3 Irrigation pipe 31 Second control valve

[0033] 32 Fourth Pipe Section 33 Fifth Pipe Section

[0034] 4. Seals 5. Float

[0035] 51 Stop plate 6 Water container

[0036] 61 Hollow outer shell 62 Linkage plate

[0037] 63 Connecting rod 64 Drain outlet

[0038] 65 Water pipe connection 7 Slope

[0039] 71. Inclined borehole 8. Reservoir

[0040] 81 Sealing cap 9 Highway blind ditch Detailed Implementation

[0041] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0042] The following description, with reference to the accompanying drawings, describes a siphon drainage system for slope drainage and automatic irrigation of vegetation according to the present invention.

[0043] like Figure 1 As shown, in an embodiment of the present invention, a siphon drainage system for slope drainage and automatic irrigation of greenery is provided, wherein the siphon drainage system for slope drainage and automatic irrigation of greenery includes:

[0044] The siphon pipe 1 includes a first pipe section 11 for extending into the inclined borehole 71 of the slope 7, a second pipe section 12 for extending into the water storage tank 8 set between the highway blind ditch 9 and the slope 7, and a third pipe section 13 connecting the first pipe section 11 and the second pipe section 12.

[0045] Drainage pipe 2, used to connect water storage tank 8 and highway blind ditch 9, is equipped with a first control valve 21 to control the opening and closing of drainage pipe 2; and

[0046] Irrigation pipe 3 is installed facing the slope 7 and its lower end extends into the water storage tank 8. A second control valve 31 is installed on the irrigation pipe 3 to control the opening and closing of the irrigation pipe 3, and the lower end of the pipe is located above the drainage pipe 2.

[0047] The vertical height of the first pipe section 11 is set to be less than the water column height corresponding to the local atmospheric pressure, and the vertical height of the irrigation pipe 3 is set to be less than the water column height corresponding to the local atmospheric pressure.

[0048] When using the aforementioned siphon drainage system, the siphon pipe 1, with its vertical height set to be less than the water column height corresponding to the local atmospheric pressure, allows groundwater from the inclined borehole 71 to be drawn into the reservoir 8 via siphon action. After the first control valve 21 is opened, the water in the reservoir 8 can flow from the drainage pipe 2 into the road blind ditch 9 to drain groundwater from the slope 7. When it is necessary to irrigate the vegetation on the slope 7, the first control valve 21 can be closed, causing the water level in the reservoir 8 to rise to the lower end of the irrigation pipe 3 and submerge it. The vertical height of the irrigation pipe 3 is set to be less than the height of the water column corresponding to the local atmospheric pressure. After the second control valve 31 is opened, the water stored in the reservoir 8 can be drawn into the irrigation pipe 3 by the water level difference and automatically irrigated on the green plants on the slope 7, thereby reducing labor intensity. At the same time, this invention uses the excess groundwater inside the slope 7 to irrigate the green plants on the slope 7 through the siphon drainage principle, ensuring the safety and stability of the slope while improving the utilization rate of groundwater, thus achieving the purpose of water resource protection. In addition, this irrigation method does not require other power and equipment, and is low-carbon and energy-saving.

[0049] It should be noted that before installing the siphon drainage system, it is necessary to excavate an inclined borehole 71 inside the slope 7 to accommodate the first pipe section 11, a burial channel for laying the third pipe section 13, and a reservoir 8 between the lower end of the slope 7 and the highway blind ditch 9. The inclined borehole 71 can be excavated at the top of the slope 7 and inclined upwards from the inside of the slope 7 towards the slope surface. When the vertical height of the first pipe section 11 is set to be less than the water column height corresponding to the local atmospheric pressure, the groundwater in the inclined borehole 71 can be siphoned from the first pipe section 11 into the third pipe section 13. The third pipe section 13 can be buried below the slope surface of the slope 7 and extends from the upper end of the slope 7 to the lower end of the slope 7. The groundwater can then flow from the third pipe section 13 into the second pipe section 12 and be guided into the reservoir 8. In addition, the reservoir 8 is covered with a sealing cap 81 to ensure the airtightness of the entire system. More specifically, the inclination angle and drilling depth of the inclined borehole 71 can be determined based on the groundwater level. In addition, the lower end of the first pipe section 11 can be located above the upper end of the irrigation pipe 3, and the lower end of the third pipe section 13 can be located below the lower end of the irrigation pipe 3 and always submerged in the water of the reservoir 8, so as to ensure that there is a sufficient water level difference between the irrigation pipe 3 and the siphon pipe 1.

[0050] In this embodiment of the invention, the irrigation pipe 3 includes a fourth pipe section 32 extending into the water storage tank 8 and a fifth pipe section 33 facing the slope surface of the slope 7. A second control valve 31 is located at the end of the fifth pipe section 33 near the fourth pipe section 32. The end of the fourth pipe section 32 away from the fifth pipe section 33 is located above the drainage pipe 2. Multiple irrigation ports are provided on the fifth pipe section 33. That is, the fourth pipe section 32 is vertically installed in the water storage tank 8, and the fifth pipe section 33 is inclined parallel to the slope surface of the slope 7, so as to more evenly irrigate the vegetation on the slope 7.

[0051] In this embodiment of the invention, the siphon drainage system further includes a linkage device, which includes a sealing element 4 for covering the lower end of the irrigation pipe 3 and a float 5 for placement in the water storage tank 8. The float 5 faces the sealing element 4 and abuts against the sealing element 4 to control the sealing element 4 to open the lower end of the pipe. That is, when the first control valve 21 is closed, the water level in the water storage tank 8 rises, and the float 5 rises along with it due to buoyancy. When the float 5 abuts against the sealing element 4, it can automatically control the sealing element 4 to open the lower end of the pipe, so that when the water level in the water storage tank 8 reaches the lower end of the irrigation pipe 3, the stored water can enter the irrigation pipe 3 due to the siphon effect and automatically irrigate the green plants on the slope 7. After the first control valve 21 is opened, the water stored in the reservoir 8 can be discharged into the blind ditch 9 of the highway through the drain pipe 2. The water level in the reservoir 8 drops, and the float 5 drops accordingly, so that the seal 4 gets rid of the float 5 and returns to its original state, continuing to cover the lower end of the irrigation pipe 3.

[0052] In this embodiment of the invention, the sealing member 4 includes an elastic member and a sealing plate that seals the lower end of the irrigation pipe 3 under the elastic force of the elastic member. The sealing plate is movably hinged to the irrigation pipe 3, and one end of the sealing plate extends laterally from the lower end of the pipe and is positioned opposite to the float 5. That is, when the sealing plate is not in contact with the float 5, the sealing plate stably seals the lower end of the irrigation pipe 3 under the elastic force of the elastic member. When the float 5 rises, the float 5 abuts against the sealing plate, which can cause the sealing plate to deflect and compress the elastic member, thereby opening the lower end of the irrigation pipe 3. Specifically, the side of the sealing plate facing the float 5 has a structure that hooks with the float 5. When the float 5 rises and abuts against the sealing plate, the float 5 hooks with the sealing plate. When the float 5 falls, the float 5 gradually disengages from the sealing plate.

[0053] In this embodiment of the invention, the linkage device further includes a water container 6 connected to the upper end of the irrigation pipe 3 via a water inlet pipe 65. A float 5 is connected to the water container 6 and is used to support the water container 6 under the action of buoyancy. That is, when the water is pressurized to the upper end of the irrigation pipe 3, it can be guided from the water inlet pipe 65 into the water container 6. After water is added to the water container 6, the downward pressure on the float 5 is increased, causing the float 5 to descend and disengage from the sealing plate. The sealing plate can then return to its original state and continue to cover the lower end of the irrigation pipe 3, thereby realizing the automatic closing operation of the sealing plate.

[0054] See Figure 1 and Figure 2 In this embodiment of the invention, the water container 6 includes a hollow outer shell 61 for mounting on the sealing cover 81 of the water storage tank 8, and a linkage plate 62 that is fitted to the inner wall of the hollow outer shell 61 and can be raised and lowered inside the hollow outer shell 61. The upper end of the water inlet pipe 65 away from the upper end of the irrigation pipe 3 is guided above the linkage plate 62. A connecting rod 63 is provided on the side of the float 5 facing the linkage plate 62. The connecting rod 63 is used to pass through the lifting port opened on the sealing cover 81 and connect to the linkage plate 62. The hollow outer shell 61 is also provided with a drain outlet 64 near the sealing cover 81. The linkage plate 62 and the hollow shell above it can form a water-holding space. As the water pipe 65 guides the stored water into the water-holding space, the amount of water on the linkage plate 62 increases, causing the linkage plate 62 to continuously descend within the cavity of the hollow shell 61. During this process, the float 5 also descends until it detaches from the sealing plate. Furthermore, after the float 5 detaches from the sealing plate, the first control valve 21 can be opened, and the float 5 continues to descend, with the linkage plate 62 following suit. When the linkage plate 62 descends to below the drain outlet 64, the stored water in the water-holding space can be discharged from the drain outlet 64, so that the water pipe 65 can supply water to the water container 6 next time.

[0055] In this embodiment of the invention, the linkage device further includes a stop plate 51 disposed on the side of the float 5 facing the drain pipe 2 and used to abut against the wall of the water storage tank 8. The stop plate 51 has a water passage hole for communicating with the drain pipe 2. That is, when the water level in the water storage tank 8 is at its initial height, the water passage hole on the stop plate 51 can communicate with the drain pipe 2, and at this time, the first control valve 21 can be opened to drain water. When it is necessary to irrigate the plants, the first control valve 21 is closed, the water level in the water storage tank 8 rises, the water passage hole on the stop plate 51 is misaligned with the drain pipe 2, and because the stop plate 51 is abutted against the wall of the water storage tank 8, the stop plate 51 can seal the opening of the drain pipe 2. During the process of the water in the water container 6 pressing down on the float 5, the water passage hole of the stop plate 51 can re-connect with the drain pipe 2, and at this time, the first control valve 21 is opened, so that the water in the water storage tank 8 can be directed into the blind ditch 9. It should be noted that the water flow area of ​​the water flow hole on the stop plate 51 can be larger than the water flow area of ​​the drain pipe 2.

[0056] In this embodiment of the invention, the drainage capacity of the drain pipe 2 is set to be no less than the replenishment capacity of the siphon pipe 1; and / or, the drainage capacity of the irrigation pipe 3 is set to be less than the replenishment capacity of the siphon pipe 1. That is, the drain pipe 2 can always ensure that the water storage capacity in the reservoir 8 is within a certain stable range, while the irrigation pipe 3 can always perform irrigation operations without interruption. Specifically, the inner diameter of the siphon pipe 1 can be 3mm to 6mm, specifically 4mm, and the number of siphon pipes 1 can be less than 600. In addition, the inner diameter of the irrigation pipe 3 is no less than 32mm, and irrigation openings are evenly spaced on both sides of the irrigation pipe 3. The distance between two adjacent irrigation openings on the same linear array can be 20cm, and the diameter of the irrigation opening can be 5mm.

[0057] To achieve the above objectives, the present invention also provides a siphon drainage method for slope drainage and automatic irrigation of vegetation, applied to the siphon drainage system for slope drainage and automatic irrigation of vegetation as described above, wherein:

[0058] An inclined borehole 71 is drilled inside the upper end of the slope 7, wherein the inclined borehole 71 is set upward from the inside of the slope 7 toward the slope surface of the slope 7.

[0059] A burial channel is excavated below the slope surface of slope 7. One end of the burial channel is connected to the end of the inclined borehole 71 that is close to the slope surface of slope 7, and the other end of the burial channel is inclined downward toward the side away from the inclined borehole 71.

[0060] A water storage tank 8 is installed between the blind ditch 9 and the slope 7 of the highway;

[0061] The first section 11, the third section 13, and the second section 12 of the siphon pipe 1 are placed in the inclined borehole 71, the buried channel, and the water storage tank 8 in a one-to-one correspondence.

[0062] A drainage pipe 2 is installed between the water storage tank 8 and the road blind ditch 9, and an irrigation pipe 3 is installed on the water storage tank 8;

[0063] The first control valve 21 is opened to allow the water in the reservoir 8 to drain from the drainage pipe 2 to the blind ditch 9 on the highway.

[0064] The first control valve 21 is closed to raise the water level in the reservoir 8 to the lower end of the irrigation pipe 3.

[0065] The second control valve 31 is opened to allow the water stored in the reservoir 8 to enter the irrigation pipe 3 and spray the vegetation on the slope 7.

[0066] Specifically, the location of the inclined borehole 71 is determined on the slope 7 where internal drainage is required. The inclination angle and drilling depth of the inclined borehole 71 can be determined according to the groundwater level. The inlet of the siphon pipe 1 is placed inside the inclined borehole 71, and the outlet of the siphon pipe 1 is placed in a sealed water storage tank 8. The water storage tank 6 is located at the toe of the slope 7.

[0067] Furthermore, when the system is used for the first time, the first control valve 21 can be closed to allow water to flow in reverse into the irrigation pipe 3 to expel the gas inside the siphon pipe 1. After the gas inside the siphon pipe 1 is expelled, the reverse water flow into the irrigation pipe 3 is stopped, the first control valve 21 is opened, the siphon drainage is started, and the groundwater inside the slope flows sequentially through the siphon pipe 1, the reservoir 8, and the drainage pipe 2, and is finally discharged from the road blind ditch 9.

[0068] In addition, when it is necessary to irrigate the vegetation on the slope, the first control valve 21 is closed and the second control valve 31 is opened. The water level in the reservoir 8 rises, and the float 5 follows suit and begins to rise. When the float 5 rises to abut against the sealing plate of the sealing element 4, the float 5 opens the sealing plate under the action of the lever, and the water begins to flow into the irrigation pipe 3, and then is discharged from the irrigation port on the pipe wall of the irrigation pipe 3, thus completing the irrigation of the vegetation on the slope.

[0069] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A siphon drainage system for slope drainage and automatic irrigation of greenery, characterized in that, include: The siphon (1) includes a first pipe section (11) for extending into an inclined borehole (71) of the slope (7), a second pipe section (12) for extending into a reservoir (8) set between the road blind ditch (9) and the slope (7), and a third pipe section (13) connecting the first pipe section (11) and the second pipe section (12). A drain pipe (2) is used to connect the water storage tank (8) and the highway blind ditch (9). A first control valve (21) is provided on the drain pipe (2) to control the opening and closing of the drain pipe (2); and An irrigation pipe (3) is provided facing the slope (7) and its lower end extends into the water storage tank (8). A second control valve (31) is provided on the irrigation pipe (3) to control the opening and closing of the irrigation pipe (3), and the lower end of the pipe is located above the drainage pipe (2). The vertical height of the first pipe section (11) is set to be less than the height of the water column corresponding to the local atmospheric pressure, and the vertical height of the irrigation pipe (3) is set to be less than the height of the water column corresponding to the local atmospheric pressure. The siphon drainage system also includes a linkage device, which includes a seal (4) for covering the lower end of the irrigation pipe (3) and a float (5) for placing in the water storage tank (8). The float (5) is positioned facing the seal (4) and is used to abut against the seal (4) to control the seal (4) to open the lower end of the pipe.

2. The siphon drainage system for slope drainage and automatic irrigation of greenery according to claim 1, characterized in that, The irrigation pipe (3) includes a fourth pipe section (32) for extending into the water storage tank (8) and a fifth pipe section (33) for being set on the slope facing the slope (7). The second control valve (31) is set at one end of the fifth pipe section (33) near the fourth pipe section (32). The end of the fourth pipe section (32) away from the fifth pipe section (33) is located above the drainage pipe (2). Multiple irrigation ports are provided on the fifth pipe section (33).

3. The siphon drainage system for slope drainage and automatic irrigation of greenery according to claim 1, characterized in that, The sealing element (4) includes an elastic element and a sealing plate that seals the lower end of the irrigation pipe (3) under the elastic force of the elastic element. The sealing plate is movably hinged to the irrigation pipe (3) and extends laterally from one end of the lower end of the pipe, which is opposite to the float (5).

4. The siphon drainage system for slope drainage and automatic irrigation of greenery according to claim 1, characterized in that, The linkage device also includes a water container (6) connected to the upper end of the irrigation pipe (3) via a water inlet pipe (65), and the float (5) is connected to the water container (6) and is used to support the water container (6) under the action of buoyancy.

5. The siphon drainage system for slope drainage and automatic irrigation of greenery according to claim 4, characterized in that, The water container (6) includes a hollow outer shell (61) for mounting on the sealing cover (81) of the water storage tank (8) and a linkage plate (62) that is fitted to the inner wall of the hollow outer shell (61) and can be raised and lowered inside the hollow outer shell (61). The end of the water inlet pipe (65) away from the upper end of the irrigation pipe (3) is guided to the top of the linkage plate (62). A connecting rod (63) is provided on the side of the float (5) facing the linkage plate (62). The connecting rod (63) is used to pass through the sealing cover (81) through the lifting port opened on the sealing cover (81) and connect to the linkage plate (62). A drain outlet (64) is also provided on the hollow outer shell (61) near the sealing cover (81).

6. The siphon drainage system for slope drainage and automatic irrigation of vegetation according to claim 1, characterized in that, The linkage device also includes a stop plate (51) disposed on the side of the float (5) facing the drain pipe (2) and used to fit against the wall of the water storage tank (8). The stop plate (51) is provided with a water passage hole for communicating with the drain pipe (2).

7. The siphon drainage system for slope drainage and automatic irrigation of vegetation according to any one of claims 1 to 6, characterized in that, The drainage capacity of the drain pipe (2) is set to be no less than the replenishment capacity of the siphon pipe (1); and / or, the drainage capacity of the irrigation pipe (3) is set to be less than the replenishment capacity of the siphon pipe (1).

8. The siphon drainage system for slope drainage and automatic irrigation of vegetation according to any one of claims 1 to 6, characterized in that, The inner diameter of the siphon tube (1) is 3mm to 6mm, and the number of siphon tubes (1) is less than 600.

9. A siphon drainage method for slope drainage and automatic irrigation of greenery, applied to the siphon drainage system according to any one of claims 1 to 8, characterized in that, include: An inclined borehole (71) is drilled inside the upper end of the slope (7), wherein the inclined borehole (71) is inclined upward from the inside of the slope (7) toward the slope surface of the slope (7); A burial channel is excavated below the slope surface of the slope (7), wherein one end of the burial channel is connected to the end of the inclined borehole (71) near the slope surface of the slope (7), and the other end of the burial channel is inclined downward toward the side away from the inclined borehole (71). A water storage tank (8) is set between the highway blind ditch (9) and the slope (7); The first section (11), the third section (13), and the second section (12) of the siphon pipe (1) are placed one-to-one in the inclined borehole (71), the burial channel, and the water storage tank (8); A drainage pipe (2) is installed between the water storage tank (8) and the road blind ditch (9), and an irrigation pipe (3) is installed on the water storage tank (8). The first control valve (21) is opened so that the water in the reservoir (8) is discharged from the drain pipe (2) to the road blind ditch (9). Control the first control valve (21) to close, so that the water level in the reservoir (8) rises to the lower end of the irrigation pipe (3); The second control valve (31) is opened so that the water stored in the reservoir (8) enters the irrigation pipe (3) and can spray the green plants on the slope (7).

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