CN113557933B

CN113557933B - Landscape water-saving device for green land of park

Info

Publication number: CN113557933B
Application number: CN202110850784.7A
Authority: CN
Inventors: 吴涛; 陶欣; 于文洛; 李尉铭; 周雯
Original assignee: Yangzhou University
Current assignee: Yangzhou University
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-08-26
Anticipated expiration: 2041-07-27
Also published as: CN113557933A

Abstract

The invention discloses a landscape water-saving device for a green land of a park, which comprises a water inlet part, a water storage part and a water distribution part which are communicated in sequence; the water inlet part is used for filtering and buffering precipitation; the water storage part comprises a water storage tank and a water outlet device communicated with the water storage tank, and the water storage tank is used for storing water flowing in from the buffer device; the water outlet device is used for sending water in the water storage tank into the water distributing part; the water distribution part comprises a main water distribution pipe and a plurality of branch water distribution pipes which are communicated with each other; the main water distribution pipe is communicated with the water outlet device, and the branch water distribution pipes are arranged underground; a plurality of water outlets are formed in one side, facing the ground, of the water distribution branch pipe, and anti-blocking devices are arranged in the water outlets. The invention achieves the purpose of opening the source by reasonably utilizing natural rainfall and achieves the purpose of throttling by directly distributing water underground; the two aspects of open source and throttling are combined, so that the water consumption of landscape irrigation of the green land of the park is effectively reduced, and the purpose of saving water is achieved.

Description

Landscape water-saving device for park green land

Technical Field

The invention relates to the field of water-saving irrigation, in particular to a landscape water-saving device for a park green land.

Background

Although the park green land needs to be irrigated frequently, tap water is generally used for irrigating, and the tap water irrigation not only easily wastes water resources, but also has higher cost, so that a landscape water-saving device for the park green land is needed.

At present, the park greenbelt landscape in China adopts surface irrigation modes such as spray irrigation, drip irrigation and the like, surface runoff is formed in the actual use process due to the fact that the irrigation strength of the surface irrigation, particularly the spray irrigation, is far greater than the allowable infiltration strength of soil, and particularly in a place with a micro-topography slope, runoff generated by irrigation flows to a low position from a high position, so that the conditions of water shortage and drought at the high position and excessive waterlogging and waterlogging at the low position are caused. Therefore, a large amount of water resources are wasted, the vegetation growth is seriously influenced, and the landscape quality is damaged.

Therefore, a device which can save irrigation water and reasonably distribute the irrigation water is needed.

Disclosure of Invention

The invention aims to provide a landscape water-saving device for a park green land, which solves the problems in the prior art.

In order to achieve the purpose, the invention provides the following scheme: the invention provides a landscape water-saving device for a park green land, which comprises a water inlet part, a water storage part and a water distribution part which are communicated in sequence;

the water inlet part comprises a water inlet shell, and a first partition plate and a second partition plate are arranged in the water inlet shell; the first partition plate and the second partition plate divide the inner cavity of the water inlet shell into a first filtering device, a second filtering device and a buffering device which are communicated in sequence; the first filtering device and the second filtering device are used for filtering water entering the water inlet part, the buffering device is used for precipitating and buffering the filtered water, and the buffering device is communicated with the water storage part;

the water storage part comprises a water storage tank and a water outlet device communicated with the water storage tank, and the water storage tank is used for storing water flowing in from the buffer device; the water outlet device is used for sending water in the water storage tank into the water distribution part;

the water distribution part comprises a main water distribution pipe and a plurality of branch water distribution pipes which are communicated with each other; the main water distribution pipe is communicated with the water outlet device, and the branch water distribution pipes are arranged underground;

and one side of the water distribution branch pipe facing the ground is provided with a plurality of water outlet holes, and anti-blocking devices are arranged in the water outlet holes.

Preferably, the anti-blocking device comprises a protective cover covering the water outlet hole, a plurality of water distribution holes are formed in the circumferential direction of the side wall of the protective cover at equal intervals, an anti-blocking ball is arranged in the protective cover, the anti-blocking ball is in sliding contact with the water outlet hole, and the diameter of the anti-blocking ball is matched with that of the water outlet hole; an elastic guide assembly is connected between the anti-blocking ball and the top surface of the inner cavity of the protective cover.

Preferably, the elastic guide assembly comprises a spring, and two ends of the spring are fixedly connected with the anti-blocking ball and the top surface of the inner cavity of the protective cover respectively; the spring inner sleeve is provided with a telescopic rod, and two ends of the telescopic rod are fixedly connected with the anti-blocking ball and the top surface of the inner cavity of the protective cover respectively.

Preferably, the first filtering device comprises a first filtering cavity, and the first filtering cavity is communicated with the second filtering device; the first filter cavity is detachably connected with a filter screen.

Preferably, the second filtering device comprises a second filtering chamber, the second filtering chamber is communicated with the first filtering chamber, the second filtering chamber is communicated with the buffering device, and a filtering layer is arranged in the second filtering chamber.

Preferably, the buffer device comprises a buffer cavity, and the buffer cavity is communicated with the second filtering cavity and the water storage tank respectively; the bottom surface of the buffer cavity is communicated with one end of a discharge pipe, and the other end of the discharge pipe is communicated with the water storage tank.

Preferably, the water storage tank comprises a tank body, the tank body is respectively communicated with a water inlet pipe, a water outlet pipe and an overflow pipe, the water inlet pipe is communicated with the buffer cavity, the tail end of the water outlet pipe extends into the bottom end of the tank body, the overflow pipe is arranged at the top end of the tank body, and the height of the overflow pipe is not higher than that of the water inlet pipe.

Preferably, the water outlet device comprises a water pump, and a water outlet of the water pump is communicated with the main water distribution pipe; the water inlet of the water pump is respectively communicated with the water outlet pipe and the overflow pipe; the overflow pipe is communicated with an automatic opening and closing assembly.

Preferably, the automatic opening and closing assembly comprises a middle box, a screw is fixed on the bottom surface of an inner cavity of the middle box, a first moving block is connected to the screw in a threaded manner, a second moving block is rotatably connected to the lower end of the first moving block, and the second moving block is connected with the screw in a sliding manner; a plurality of first connecting rods are fixed on the outer side of the first moving block at equal intervals in the circumferential direction, and floating balls are fixed at the tail ends of the first connecting rods; and a second connecting rod is fixed on the outer side of the second moving block, and the tail end of the second connecting rod is fixedly connected with a water outlet door.

Preferably, the water outlet door comprises a water outlet door cover, and one side of the water outlet door cover is fixedly connected with the second connecting rod; the outlet of the middle box is provided with a slide rail, and the water outlet door cover is connected with the slide rail in a sliding manner.

The invention discloses the following technical effects: the invention discloses a landscape water-saving device for a park green land, which effectively utilizes natural rainfall such as rain and snow and the like through a water inlet part, then stores the natural rainfall into a water storage tank of a water storage part after being sequentially treated by a first filtering device, a second filtering device and a buffer device, reasonably utilizes the natural rainfall and reduces the water volume of manual irrigation; the water distribution branch pipes are buried underground, and directly distribute water into soil through the water outlet holes, so that water resource waste caused by water evaporation on the ground in sprinkling irrigation, drip irrigation and flood irrigation is reduced, and irrigation water is saved. The invention achieves the purpose of opening the source by reasonably utilizing natural rainfall and achieves the purpose of throttling by directly distributing water underground; the two aspects of open source and throttling are combined, so that the water consumption of landscape irrigation of the green land of the park is effectively reduced, and the purpose of saving water is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic view of the water-saving landscape apparatus for use in a green space of a park according to the present invention;

FIG. 2 is a schematic view of the water inlet portion of the present invention;

FIG. 3 is a schematic view of the structure of the water storage part of the present invention;

FIG. 4 is a schematic structural view of the water distributing part of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 3;

FIG. 6 is a partial cross-sectional view of B in FIG. 4;

wherein, 1, a water inlet shell; 2. a first partition plate; 3. a second partition plate; 4. a first filtering device; 5. a second filtering device; 6. a buffer device; 7. a water storage tank; 8. a water outlet device; 9. a water distribution main pipe; 10. a water distribution branch pipe; 11. a water outlet hole; 12. an anti-clogging device; 13. a protective cover; 14. water distribution holes; 15. a plug-proof ball; 16. a spring; 17. a telescopic rod; 18. a first filter chamber; 19. a filter screen; 20. a second filter chamber; 21. a filter layer; 22. a buffer chamber; 23. a discharge pipe; 24. a box body; 25. a water inlet pipe; 26. a water outlet pipe; 27. an overflow pipe; 28. a water pump; 29. an automatic opening and closing assembly; 1001. sand and stone filler; 1002. an automatic valve; 2101. a first filter layer; 2102. a second filter layer; 2103. a third filter layer; 2104. a separation net; 2901. a middle box; 2902. a screw; 2903. a first moving block; 2904. a second moving block; 2905. a first link; 2906. a floating ball; 2907. a second link; 2908. a water outlet door cover; 2909. a slide rail.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1-6, the invention provides a landscape water-saving device for a park green land, which comprises a water inlet part, a water storage part and a water distribution part which are communicated in sequence;

the water inlet part comprises a water inlet shell 1, and a first partition plate 2 and a second partition plate 3 are arranged in the water inlet shell 1; the first partition plate 2 and the second partition plate 3 divide the inner cavity of the water inlet shell 1 into a first filtering device 4, a second filtering device 5 and a buffer device 6 which are communicated in sequence; the first filtering device 4 and the second filtering device 5 are used for filtering water entering the water inlet part, the buffer device 6 is used for precipitating and buffering the filtered water, and the buffer device 6 is communicated with the water storage part;

the water storage part comprises a water storage tank 7 and a water outlet device 8 communicated with the water storage tank 7, and the water storage tank 7 is used for storing water flowing in from the buffer device 6; the water outlet device 8 is used for sending the water in the water storage tank 7 into the water distribution part;

the water distribution part comprises a main water distribution pipe 9 and a plurality of branch water distribution pipes 10 which are communicated with each other; the main water distribution pipe 9 is communicated with the water outlet device 8, and the branch water distribution pipes 10 are arranged underground;

one side of the water distribution branch pipe 10 facing the ground is provided with a plurality of water outlets 11, and anti-blocking devices 12 are arranged in the water outlets 11.

According to a further optimized scheme, the anti-blocking device 12 comprises a protective cover 13 covering the water outlet hole 11, a plurality of water distribution holes 14 are formed in the circumferential direction of the side wall of the protective cover 13 at equal intervals, an anti-blocking ball 15 is arranged in the protective cover 13, the anti-blocking ball 15 is in sliding contact with the water outlet hole 11, and the diameter of the anti-blocking ball 15 is matched with that of the water outlet hole 11; an elastic guide component is connected between the anti-blocking ball 15 and the top surface of the inner cavity of the protective cover 13; the elastic guide component comprises a spring 16, and two ends of the spring 16 are fixedly connected with the anti-blocking ball 15 and the top surface of the inner cavity of the protective cover 13 respectively; an expansion link 17 is sleeved in the spring 16, and two ends of the expansion link 17 are fixedly connected with the anti-blocking ball 15 and the top surface of the inner cavity of the protective cover 13 respectively; the protective cover 13 is used for protecting the water outlet hole 11, preventing the water outlet hole 11 from being blocked by soil, and preventing rhizomes of ground plants from entering the water distribution branch pipe 10 to influence irrigation; when irrigation is carried out, the water pressure in the water distribution branch pipe 10 is increased, the anti-blocking ball 15 is pushed to move towards the outside of the water outlet hole 11, water in the water distribution branch pipe 10 flows into the protective cover 13 from a gap between the anti-blocking ball 15 and the water outlet hole 11 and then flows out of the water distribution holes 14, and irrigation is finished; after irrigation is finished, water injection to the water distribution branch pipes 10 is stopped, water pressure in the water distribution branch pipes 10 is reduced, the springs 16 rebound, the anti-blocking balls 15 are pushed back into the water outlet holes 11, and the water distribution branch pipes 10 are isolated from the outside; the telescopic link 17 is used for leading to prevent stopping up ball 15, prevents that stopping up ball 15 and apopore 11 skew.

Furthermore, the water distribution branch pipe 10 is filled with sand and stone filler 1001, one is for uniform water distribution, and the other is for preventing external plant roots from entering the water distribution branch pipe 1001.

Further, an automatic valve 1002 is arranged between the main water distribution pipe 9 and the water distribution pipes, the automatic valve 1002 adopts a nail body drip irrigation controller, water can be supplied in a fixed time and quantity manner, and the water can be supplied for 15 minutes to 24 hours within 24 hours; according to the distribution positions of the water distribution branch pipes 10, the opening and closing time of the corresponding automatic valve 1002 is adjusted, the irrigation water quantity is controlled, and water is saved.

In a further optimized scheme, the first filtering device 4 comprises a first filtering cavity 18, and the first filtering cavity 18 is communicated with the second filtering device 5; a filter screen 19 is detachably connected in the first filter cavity 18; after the natural precipitation from the outside flows into the first filter chamber 18, the natural precipitation flows into the second filter device 5 through the primary filtration of the filter screen 19.

Furthermore, in order to facilitate cleaning of the filter screen 19, the filter screen 19 is of a basket type, so that impurities which easily block a pipeline, such as fallen leaves, grass roots and plastic bags in sewage are primarily filtered, and during cleaning, the first filter chamber 18 is directly lifted through a basket handle and then cleaned.

In a further optimized scheme, the second filtering device 5 comprises a second filtering cavity 20, the second filtering cavity 20 is communicated with the first filtering cavity 18, the second filtering cavity 20 is communicated with the buffering device 6, and a filtering layer 21 is arranged in the second filtering cavity 20; the water filtered by the first filter device 4 enters the second filter chamber 20, and then is filtered from top to bottom by the filter layer 21 and flows into the buffer chamber 22.

Further, in order to enhance the filtering effect, the filter layer 21 is divided into a first filter layer 2101, a second filter layer 2102 and a third filter layer 2103 from top to bottom, which are separated by a separation net 2104.

In a further optimized scheme, the buffer device 6 comprises a buffer cavity 22, and the buffer cavity 22 is respectively communicated with the second filter cavity 20 and the water storage tank 7; the bottom surface of the buffer cavity 22 is communicated with one end of a discharge pipe 23, and the other end of the discharge pipe 23 is communicated with the water storage tank 7; the water filtered again by the filter layer 21 flows into the buffer chamber 22 for buffering and sedimentation, and then flows into the water storage tank 7 through the water inlet pipe 25, and the accumulated water in the buffer chamber 22 is guided into the water storage tank 7 by the discharge pipe 23, so that the water accumulation and odor generation of the buffer chamber 22 are prevented.

Further, in order to facilitate the cleaning and maintenance of the water inlet part, openable and closable maintenance doors 32 are arranged at the tops of the first filtering device 4, the second filtering device 5 and the buffer device 6.

In a further optimized scheme, the water storage tank 7 comprises a tank body 24, the tank body 24 is respectively communicated with a water inlet pipe 25, a water outlet pipe 26 and an overflow pipe 27, the water inlet pipe 25 is communicated with the buffer cavity 22, the tail end of the water outlet pipe 26 extends into the bottom end of the tank body 24, the overflow pipe 27 is arranged at the top end of the tank body 24, and the height of the overflow pipe 27 is not higher than that of the water inlet pipe 25; the water storage tank 7 is used for storing irrigation water, and does not need to be externally connected with a water source during irrigation; when irrigation is needed, water in the water storage tank 7 is pumped out by the water outlet pipe 26; when the precipitation is more, the water level in the water storage tank 7 rises, and when the water level reaches a certain degree, the water in the water storage tank 7 is discharged by the overflow pipe 27; the height of the water inlet pipe 25 is not lower than that of the overflow pipe 27, so that the water in the water storage tank 7 is prevented from flowing backwards into the buffer cavity 22 when the water level is high.

Further, in order to prevent the water of the water inlet pipe 25 from directly flowing into the overflow pipe 27, a partition plate 30 is provided between the water inlet pipe 25 and the overflow pipe 27.

According to a further optimized scheme, the water outlet device 8 comprises a water pump 28, and a water outlet of the water pump 28 is communicated with the main water distribution pipe 9; the water inlet of the water pump 28 is respectively communicated with the water outlet pipe 26 and the overflow pipe 27; the overflow pipe 27 is communicated with an automatic opening and closing component 29; during irrigation, the water pump 28 is started, and the water pump 28 in the water storage tank 7 enters the main water distribution pipe 9; when the water level in the storage tank 7 is too high, the water pump 28 is activated and water is pumped out from the water outlet pipe 26 and the overflow pipe 27 through the water pump 28 to adjust the water level in the storage tank 7.

In a further optimized scheme, the automatic opening and closing assembly 29 comprises an intermediate box 2901, a screw 2902 is fixed on the bottom surface of an inner cavity of the intermediate box 2901, a first moving block 2903 is connected to the screw 2902 in a threaded manner, a second moving block 2904 is connected to the lower end of the first moving block 2903 in a rotating manner, and the second moving block 2904 is connected with the screw 2902 in a sliding manner; a plurality of first connecting rods 2905 are fixed on the outer side of the first moving block 2903 at equal intervals in the circumferential direction, and floating balls 2906 are fixed at the tail ends of the first connecting rods 2905; a second connecting rod 2907 is fixed on the outer side of the second moving block 2904, and a water outlet door is fixedly connected to the tail end of the second connecting rod 2907; the water outlet door comprises a water outlet door cover 2908, and one side of the water outlet door cover 2908 is fixedly connected with a second connecting rod 2907; a slide rail 2909 is arranged at the outlet of the middle box 2901, and the water outlet door cover 2908 is connected with the slide rail 2909 in a sliding way; the floating ball 2906 is made of low-density material and floats on the water surface; when the water level in the water storage tank 7 is too high, water enters from the inlet of the overflow pipe and then flows into the middle box 2901, the water level of the middle box 2901 rises, the floating ball 2906 floats on the water surface, the first moving block 2903 is driven to rise through the first connecting rod 2905, the first moving block 2903 drives the second moving block 2904 to rise, the second moving block 2904 drives the water outlet door 2908 to rise in the sliding rail 2909, and the outlet of the middle box 2901 is opened, so that the water enters the water inlet of the water pump 28.

Further, a control switch 2910 is provided at the top end of the outlet gate 2908, and when the outlet gate 2908 slides upward, the control switch 2910 is turned on, and the control switch 2910 controls the water pump 28 to be started to discharge excess water.

Furthermore, check valves 31 are arranged in the discharge pipe 23, the overflow pipe and the main water distribution pipe 9, so that water cannot flow backwards.

The using method comprises the following steps:

the daily precipitation or the water supplemented manually enters the first filtering device 4, enters the second filtering device 5 after being filtered by the filter screen 19, enters the buffering device 6 after being filtered layer by the filter layer 21, and then enters the water storage tank 7 through the discharge pipe 23 or the water inlet pipe 25 to store or supplement water.

When the park green land landscape needs irrigation, the water pump 28 is started, the water pump 28 in the water storage tank 7 enters the main water distribution pipe 9 through the water outlet pipe 26, and then enters the branch water distribution pipe 10 after being distributed through the automatic valve 1002.

When the water level in the water storage tank 7 is too high, water enters from an inlet of the overflow pipe and then flows into the middle box 2901, the water level of the middle box 2901 rises, the floating ball 2906 floats on the water surface, the first moving block 2903 is driven to rise through the first connecting rod 2905, the first moving block 2903 drives the second moving block 2904 to rise, the second moving block 2904 drives the water outlet door cover 2908 to rise in the sliding rail 2909, and the outlet of the middle box 2901 is opened to enable the water to enter the water inlet of the water pump 28; at the same time, the control switch 2910 controls the water pump 28 to start, and at the same time, the water is drained from the overflow pipe and the water outlet pipe 26, and the water level of the water storage tank 7 is adjusted.

When water is irrigated, the water pressure in the water distribution branch pipe 10 is increased, the anti-blocking ball 15 is pushed to move towards the outside of the water outlet hole 11, water in the water distribution branch pipe 10 flows into the protective cover 13 from a gap between the anti-blocking ball 15 and the water outlet hole 11, and then flows out from the water distribution hole 14, and irrigation is completed; after irrigation is finished, water injection into the water distribution branch pipes 10 is stopped, water pressure in the water distribution branch pipes 10 is lowered, the springs 16 rebound, the anti-blocking balls 15 are pushed back into the water outlet holes 11, and the water distribution branch pipes 10 are isolated from the outside.

The invention achieves the purpose of opening the source by reasonably utilizing natural rainfall and achieves the purpose of throttling by directly distributing water underground; the two aspects of open source and throttling are combined, so that the water consumption of landscape irrigation of the green land of the park is effectively reduced, and the purpose of saving water is achieved.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. A landscape water saving fixtures that is used for park greenery patches which characterized in that: comprises a water inlet part, a water storage part and a water distribution part which are communicated in sequence;

the water inlet part comprises a water inlet shell (1), and a first partition plate (2) and a second partition plate (3) are arranged in the water inlet shell (1); the first partition plate (2) and the second partition plate (3) divide the inner cavity of the water inlet shell (1) into a first filtering device (4), a second filtering device (5) and a buffering device (6) which are communicated in sequence; the first filtering device (4) and the second filtering device (5) are used for filtering water entering the water inlet part, the buffering device (6) is used for precipitating and buffering the filtered water, and the buffering device (6) is communicated with the water storage part;

the water storage part comprises a water storage tank (7) and a water outlet device (8) communicated with the water storage tank (7), and the water storage tank (7) is used for storing water flowing in from the buffer device (6); the water outlet device (8) is used for sending water in the water storage tank (7) to the water distribution part;

the water distribution part comprises a main water distribution pipe (9) and a plurality of branch water distribution pipes (10) which are communicated with each other; the main water distribution pipe (9) is communicated with the water outlet device (8), and the branch water distribution pipe (10) is arranged underground;

one side of the water distribution branch pipe (10) facing the ground is provided with a plurality of water outlet holes (11), and anti-blocking devices (12) are arranged in the water outlet holes (11);

the anti-blocking device (12) comprises a protective cover (13) covering the water outlet hole (11), a plurality of water distribution holes (14) are formed in the circumferential direction of the side wall of the protective cover (13) at equal intervals, an anti-blocking ball (15) is arranged in the protective cover (13), the anti-blocking ball (15) is in sliding contact with the water outlet hole (11), and the diameter of the anti-blocking ball (15) is matched with that of the water outlet hole (11); an elastic guide assembly is connected between the anti-blocking ball (15) and the top surface of the inner cavity of the protective cover (13);

the first filtering device (4) comprises a first filtering cavity (18), and the first filtering cavity (18) is communicated with the second filtering device (5); a filter screen (19) is detachably connected in the first filter cavity (18);

the water storage tank (7) comprises a tank body (24), and the tank body (24) is respectively communicated with a water inlet pipe (25), a water outlet pipe (26) and an overflow pipe (27);

the water outlet device (8) comprises a water pump (28), and a water outlet of the water pump (28) is communicated with the main water distribution pipe (9); the water inlet of the water pump (28) is respectively communicated with the water outlet pipe (26) and the overflow pipe (27); the overflow pipe (27) is communicated with an automatic opening and closing assembly (29);

the automatic opening and closing assembly (29) comprises an intermediate box (2901), a screw rod (2902) is fixed on the bottom surface of an inner cavity of the intermediate box (2901), a first moving block (2903) is connected to the screw rod (2902) in a threaded mode, a second moving block (2904) is connected to the lower end of the first moving block (2903) in a rotating mode, and the second moving block (2904) is connected with the screw rod (2902) in a sliding mode; a plurality of first connecting rods (2905) are fixed on the outer side of the first moving block (2903) in the circumferential direction at equal intervals, and floating balls (2906) are fixed at the tail ends of the first connecting rods (2905); a second connecting rod (2907) is fixed on the outer side of the second moving block (2904), and a water outlet door is fixedly connected to the tail end of the second connecting rod (2907);

the water outlet door comprises a water outlet door cover (2908), and one side of the water outlet door cover (2908) is fixedly connected with the second connecting rod (2907); the outlet of the middle box (2901) is provided with a slide rail (2909), and the water outlet door cover (2908) is connected with the slide rail (2909) in a sliding way.

2. The landscape water saving device for park greens according to claim 1, wherein: the elastic guide assembly comprises a spring (16), and two ends of the spring (16) are fixedly connected with the anti-blocking ball (15) and the top surface of the inner cavity of the protective cover (13) respectively; the spring (16) is internally sleeved with a telescopic rod (17), and two ends of the telescopic rod (17) are fixedly connected with the anti-blocking ball (15) and the top surface of the inner cavity of the protective cover (13) respectively.

3. The landscape water saving device for park greens according to claim 1, wherein: the second filtering device (5) comprises a second filtering cavity (20), the second filtering cavity (20) is communicated with the first filtering cavity (18), the second filtering cavity (20) is communicated with the buffering device (6), and a filtering layer (21) is arranged in the second filtering cavity (20).

4. The landscape water saving device for park greens according to claim 3, wherein: the buffer device (6) comprises a buffer cavity (22), and the buffer cavity (22) is respectively communicated with the second filter cavity (20) and the water storage tank (7); the bottom surface of the buffer cavity (22) is communicated with one end of a discharge pipe (23), and the other end of the discharge pipe (23) is communicated with the water storage tank (7).

5. The landscape water saving device for park greens according to claim 4, wherein: the water inlet pipe (25) is communicated with the buffer cavity (22), the tail end of the water outlet pipe (26) extends into the bottom end of the box body (24), the overflow pipe (27) is arranged at the top end of the box body (24), and the height of the overflow pipe (27) is not higher than that of the water inlet pipe (25).