A roof water-saving device for green buildings and its operation method

Abstract

The present invention belongs to the technical field of green building, and specifically relates to a roof water-saving device for green buildings and its operation method, including a square bucket; a group of collection grooves are fixedly connected to the top end of the square bucket, and the cross-section of the collection groove is an inverted isosceles trapezoid; a group of annular cylinders are fixedly connected to the inner wall of the top end of the square bucket through connecting rods, and the annular cylinders and the collection grooves are correspondingly positioned; both sides of the annular cylinder are rotatably connected with filter cylinders, and the filter cylinders extend out of the outer wall of the square bucket. The cylinder body of the filter cylinder located inside the square bucket has filter holes, and the cylinder body of the filter cylinder located outside the square bucket is closed. A cover body is threadedly connected to the end of the filter cylinder extending out of the square bucket; an annular conical block is fixedly connected to the middle of the annular cylinder; a pair of water inlet pipes about the annular conical block are arranged at the top end of the annular cylinder, and the top end of the water inlet pipe is connected to the bottom end of the collection groove; it solves the problems of short quality guarantee period of collected rainwater and easy generation of peculiar smell.

Description

Technical Field

[0001] The present invention belongs to the technical field of green buildings, and specifically relates to a roof water-saving device for green buildings and its operation method. Background Art

[0002] Rainwater recycling is one of the important measures for green buildings to achieve water conservation, emission reduction and promote sustainable development. Rainwater recycling is an efficient and environmentally friendly way of resource utilization. Through scientific design and reasonable layout, green buildings can collect, store and utilize rainwater resources for daily needs such as irrigation and toilet flushing.

[0003] In the prior art, in order to save water resources, a rainwater collection device is generally installed on the top floor of a building. However, the current water-saving device has the following problems: the filtering device of the existing collection bucket only blocks large impurities, such as gravel or leaves, etc. However, rainwater itself is not pure water and contains impurities. The existing collection device directly collects rainwater, which will cause impurities in the collection bucket to precipitate and form a large amount of solid impurities, affecting the water quality, resulting in a shorter shelf life of the water quality in the collection bucket, and there are a large number of peculiar smells when used for building sanitation.

[0004] Therefore, the present invention provides a roof water-saving device for green buildings and its operation method. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, a roof water-saving device for green buildings and its operation method are proposed to solve the problems raised in the background art.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a roof water-saving device for green buildings, including a square bucket, a plurality of collecting grooves arranged side by side are fixedly connected to the top end of the square bucket, the cross-section of the collecting groove is an inverted isosceles trapezoid, the top end of the inner wall of the square bucket is fixedly connected with a plurality of annular cylinders arranged side by side through connecting rods, and the positions of the annular cylinders and the collecting grooves correspond one by one. Both ends of the annular cylinder are rotatably connected with a filtering cylinder, and one end of the two filtering cylinders far away from the annular cylinder penetrates through the outer wall of the square bucket. The cylinder body of the filtering cylinder located inside the square bucket has filtering holes, and the cylinder body of the filtering cylinder located outside the square bucket is closed. A cover body is threadedly connected to the end of the filtering cylinder extending out of the square bucket. A circular conical block is fixedly connected to the middle of the inner wall of the annular cylinder. A pair of water inlet pipes symmetrically arranged with respect to the circular conical block are provided at the top end of the annular cylinder. The upper end of the water inlet pipe is connected to the inner bottom of the collecting groove. The annular cylinder is communicated with the collecting groove through the water inlet pipe. A conical filter screen is fixedly connected to the upper end of the water inlet pipe. Servo motors are fixedly installed on both side walls of the square bucket. A first rotating shaft is installed on the output end of the servo motor. A first bevel gear is fixedly connected to the first rotating shaft. A second bevel gear is fixedly connected to the outer side wall of the filtering cylinder located outside the square bucket. The first bevel gear is meshed with the second bevel gear. The servo motor is started through a starting member.

[0007] Preferably, the starting member includes an inclined groove. An inclined groove is formed on the inclined side wall of the collecting groove. A sliding column is slidably connected in the inclined groove. A floating ball is fixedly connected to the end of the sliding column. A baffle is fixedly connected to the inclined side wall of the collecting groove. The baffle is located directly above the inclined groove. A pressure sensor is fixedly connected to the bottom end of the baffle. A humidity sensor is fixedly connected to the outer side wall of the collecting groove.

[0008] Preferably, a moving column is slidably connected through the cover body. Connecting columns arranged side by side are fixedly connected to the column body of the moving column located inside the filter cylinder. A plurality of coaxially arranged annular plates are slidably connected to the inner wall of the filter cylinder. The inner side wall of the annular plate is fixedly connected to the connecting column. The moving column moves left and right through a circulating member.

[0009] Preferably, the circulating member includes an annular disc. An annular disc is provided on the first rotating shaft. An annular corrugated groove is formed at the bottom end of the annular disc. A push rod is fixedly connected to the column body of the moving column located outside the cover body. A first groove is formed at the bottom end of the push rod. A U-shaped column is slidably connected in the first groove. One end of the column body of the U-shaped column is slidably connected in the annular corrugated groove. The other end of the column body of the U-shaped column is connected to the first groove through a spring.

[0010] Preferably, annular storage grooves are formed on both annular walls on both sides of the annular plate. The cross-section of the annular storage groove is semi-heart-shaped.

[0011] Preferably, an annular cavity is formed on the annular plate. The annular cavity is located between the two annular storage grooves. A plurality of discharge holes are formed on both side walls of the annular plate. The discharge holes communicate with the annular cavity. Both the moving column and the connecting column are hollow. A feed pipe is provided at the end of the moving column. The feed pipe is a flexible pipe. The feed pipe communicates with the annular cavity through the moving column and the connecting column.

[0012] Preferably, the upper and lower ends of the water inlet pipe are rotatably connected to the top end of the annular cylinder and the bottom of the collecting groove respectively. A third bevel gear is provided on the outer side wall of the water inlet pipe. A fourth bevel gear is fixedly connected to the outer side wall of the filter cylinder near one end of the annular cylinder. The third bevel gear is meshed with the fourth bevel gear. A scraping plate is fixedly connected to the bottom end of the collecting groove. The scraping plate is located between the two conical filter meshes. Both sides of the scraping plate are in mutual contact with the conical filter meshes.

[0013] Preferably, first fixing columns are fixedly connected to both side walls of the square barrel. A first annular sliding groove is formed on the outer side wall of the annular disc. The first fixing column is slidably connected in the first annular sliding groove. The cross-sections of the first fixing column and the first annular sliding groove are both T-shaped. Symmetrically distributed first crescent grooves are formed on the inner annular wall of the annular disc. A pair of symmetrically distributed second grooves are formed on the shaft body of the first rotating shaft. A first clamping block is fixedly connected to the second groove through a spring. The end of the first clamping block away from the spring is arc-shaped.

[0014] Preferably, a plurality of second fixing columns are fixedly connected to the top end of the annular cylinder. A second annular sliding groove is formed at the bottom of the third bevel gear. The second fixing columns are slidably connected in the second annular sliding groove. The cross-sections of the second fixing columns and the second annular sliding groove are T-shaped. The water inlet pipe penetrates through the third bevel gear. A pair of second crescent grooves are formed on the inner wall of the inner ring of the third bevel gear in the radial direction. A pair of third grooves are formed on the outer side wall of the water inlet pipe in the radial direction. A second clamping block is fixedly connected in the third groove through a spring. The end of the second clamping block away from the spring is arc-shaped.

[0015] An operation method of a roof water-saving device for green buildings includes the following steps:

[0016] S1: When starting the servo motor through the starting part, the first bevel gear and the second bevel gear are engaged to drive the filter cylinder to rotate, and then the rainwater and impurities are separated by centrifugal force;

[0017] S2: Drive the moving column to move left and right through the circulating part, and drive the annular plate to scrape the inner wall of the filter cylinder to avoid blockage of the filter cylinder;

[0018] S3: Clean the impurities in the filter cylinder. Open the cover body, pull out the moving column, the connecting column and the annular plate as a whole from the filter cylinder, and bring out the impurities in the filter cylinder through the annular plate to complete the cleaning of the filter cylinder.

[0019] The beneficial effects of the present invention:

[0020] In the present invention, rainwater enters the filter cylinder through the water inlet pipe and the annular cylinder. The starting part starts the servo motor, the first rotating shaft rotates, and through the engagement of the first bevel gear and the second bevel gear, the filter cylinder is driven to rotate. The rainwater is secondarily filtered by centrifugal force, thereby removing rainwater impurities, prolonging the shelf life of the collected water in the square barrel, ensuring the water storage quality, and the impurities in the filter cylinder are regularly cleaned by opening the cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 is a schematic structural diagram of the present invention;

[0023] Figure 2 is a cross-sectional view of the filter cylinder in the present invention;

[0024] Figure 3 is Figure 2 a partial enlarged view of A in

[0025] Figure 4 is Figure 2 a partial enlarged view of B in

[0026] Figure 5 is Figure 2Partial enlarged view at position C in the [diagram];

[0027] Figure 6 is the exploded view of the filter cartridge in the present invention;

[0028] Figure 7 is the side sectional view of the collection tank in the present invention;

[0029] Figure 8 is the three-dimensional view of the annular disc in the present invention;

[0030] Figure 9 is the sectional view of the annular disc in the present invention;

[0031] Figure 10 is the sectional view of the third bevel gear in the present invention.

[0032] In the figure: 1, square barrel; 11, collection tank; 12, annular cylinder; 13, filter cartridge; 14, cover body; 15, water inlet pipe; 16, conical filter screen; 17, servo motor; 18, annular conical block; 19, first rotating shaft; 2, first bevel gear; 21, second bevel gear; 22, inclined groove; 23, baffle; 24, pressure sensor; 25, float ball; 26, sliding column; 27, humidity sensor; 3, moving column; 31, connecting column; 32, annular plate; 33, annular disc; 34, annular corrugated groove; 35, push rod; 36, first groove; 37, U-shaped column; 4, annular storage tank; 41, feed pipe; 42, annular cavity; 43, discharge hole; 5, third bevel gear; 51, fourth bevel gear; 52, scraping plate; 6, first annular sliding groove; 61, first fixing column; 62, first crescent groove; 63, second groove; 64, first clamping block; 65, second annular sliding groove; 66, second fixing column; 67, second crescent groove; 68, third groove; 69, second clamping block. Detailed implementation manners

[0033] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0034] As shown in Figures 1 to 10As shown in the figure, a roof water-saving device for green buildings according to an embodiment of the present invention includes a square bucket 1. A plurality of collecting grooves 11 arranged side by side are fixedly connected to the top end of the square bucket 1. The cross-section of the collecting groove 11 is an inverted isosceles trapezoid. The inner wall top end of the square bucket 1 is fixedly connected with a plurality of annular cylinders 12 arranged side by side through connecting rods, and the positions of the annular cylinders 12 and the collecting grooves 11 correspond one by one. Both ends of the annular cylinder 12 are rotatably connected with a filtering cylinder 13. One end of the two filtering cylinders 13 away from the annular cylinder 12 penetrates through the outer wall of the square bucket 1. The cylinder body of the filtering cylinder 13 located inside the square bucket 1 has filtering holes. The cylinder body of the filtering cylinder 13 located outside the square bucket 1 is closed. A cover body 14 is threadedly connected to the end of the filtering cylinder 13 extending out of the square bucket 1. The middle part of the inner wall of the annular cylinder 12 is fixedly connected with an annular conical block 18. A pair of water inlet pipes 15 symmetrically arranged with respect to the annular conical block 18 are provided at the top end of the annular cylinder 12. The upper end of the water inlet pipe 15 is connected to the inner bottom of the collecting groove 11. The annular cylinder 12 is communicated with the collecting groove 11 through the water inlet pipe 15. A conical filter screen 16 is fixedly connected to the upper end of the water inlet pipe 15. Servo motors 17 are fixedly installed on both side walls of the square bucket 1. A first rotating shaft 19 is installed on the output end of the servo motor 17. A first bevel gear 2 is fixedly connected to the first rotating shaft 19. A second bevel gear 21 is fixedly connected to the outer side wall of the filtering cylinder 13 located in the square bucket 1. The first bevel gear 2 is meshed with the second bevel gear 21. The servo motor 17 is started through a starting component. When the present invention is working, rainwater is collected through the collecting groove 11, enters the filtering cylinder 13 through the water inlet pipe 15 and the annular cylinder 12. Subsequently, the servo motor 17 is started, the first rotating shaft 19 rotates, and drives the filtering cylinder 13 to rotate through the meshing of the first bevel gear 2 and the second bevel gear 21. By using the rotation of the filtering cylinder 13 to swing the rainwater, the rainwater is subjected to secondary filtration treatment by centrifugal force (the first filtration is the conical filter screen 16, and the mesh of the filtering holes of the filtering cylinder 13 is much smaller than that of the conical filter screen 16, so that the filtering cylinder 13 performs the second filtration on the rainwater), thereby removing impurities in the rainwater, prolonging the shelf life of the collected water in the square bucket 1, ensuring the water storage quality. At the same time, the impurities are only located in the filtering cylinder 13 and will not precipitate in the square bucket 1. The impurities in the filtering cylinder 13 are regularly cleaned by opening the cover body 14. At the same time, the water outlet pipe or the overflow pipe in the square bucket 1 are all prior arts (not shown).

[0035] The starting component includes an inclined groove 22. The inclined side wall of the collection groove 11 is provided with the inclined groove 22. A sliding column 26 is slidably connected in the inclined groove 22. A floating ball 25 is fixedly connected to the end of the sliding column 26. A baffle 23 is fixedly connected to the inclined side wall of the collection groove 11. The baffle 23 is located directly above the inclined groove 22. A pressure sensor 24 is fixedly connected to the bottom end of the baffle 23. A humidity sensor 27 is fixedly connected to the outer side wall of the collection groove 11. During rainfall, the collection groove 11 collects rainwater. The rainwater is filtered by the conical filter screen 16 and the filter cylinder 13. At this time, since the servo motor 17 is not working, the filtering of the filter cylinder 13 is slower. If it is only a small rainfall, the self-filtering ability of the filter cylinder 13 can meet the rainfall amount of the rainwater, and the servo motor 17 does not need to be started. When there is a large rainfall and the self-filtering of the filter cylinder 13 cannot meet the rainfall, the collection groove 11 will slowly store rainwater, driving the floating ball 25 to move upward. The floating ball 25 presses against the pressure sensor 24, and the pressure sensor 24 controls the servo motor 17 to start. The filter cylinder 13 rotates, using centrifugal force to increase the filtering ability of the filter cylinder 13. The water surface in the collection groove 11 will move downward. When the rainfall stops later, after the humidity sensor 27 detects that the humidity of the air has dropped to a certain level, the servo motor 17 stops (when the floating ball 25 presses against the pressure sensor 24 to start the servo motor 17, the floating ball 25 separating from the pressure sensor 24 will not affect the operation of the servo motor 17. The humidity sensor 27 shuts down the servo motor 17 to avoid the influence of morning or evening dew).

[0036] A moving column 3 is slidably connected through the cover body 14. A connection column 31 arranged side by side is fixedly connected to the column body of the moving column 3 located inside the filter cylinder 13. A plurality of coaxially arranged annular plates 32 are slidably connected to the inner wall of the filter cylinder 13. The inner side wall of the annular plate 32 is fixedly connected to the connection column 31. The moving column 3 moves left and right through a circulation component. The annular plate 32 divides the incoming rainwater, allowing impurities to be distributed on the inner wall of the filter cylinder 13 between adjacent annular plates 32. When the annular plate 32 moves back and forth following the moving column 3, the annular plate 32 can play a role in scraping the material, thereby performing scraping treatment, ensuring the filtering efficiency of the rainwater under the action of centrifugal force on the filter cylinder 13, and preventing impurities from blocking the filter holes on the filter cylinder 13.

[0037] The circulating part includes an annular disc 33. The annular disc 33 is provided on the first rotating shaft 19. An annular corrugated groove 34 is formed at the bottom end of the annular disc 33. A push rod 35 is fixedly connected to the column body of the moving column 3 outside the cover body 14. A first groove 36 is formed at the bottom end of the push rod 35. A U-shaped column 37 is slidably connected in the first groove 36. One end column body of the U-shaped column 37 is slidably connected in the annular corrugated groove 34. The other end column body of the U-shaped column 37 is connected to the first groove 36 through a spring. During operation, the first rotating shaft 19 rotates, driving the annular disc 33 to rotate. The rotation of the annular disc 33 drives the U-shaped column 37 and the push rod 35 to move left and right through the annular corrugated groove 34, thereby driving the moving column 3 to move left and right, and then driving the annular plate 32 to scrape the material. At the same time, the U-shaped column 37 undergoes telescopic processing through the first groove 36. After the cover body 14 is opened, one end of the U-shaped column 37 is disengaged from the annular corrugated groove 34, the cover body 14 is disengaged from the filter cylinder 13, and at the same time, the moving column 3 is pulled out, so that the annular plate 32 scrapes the inner wall of the filter cylinder 13 to remove impurities.

[0038] Annular storage grooves 4 are formed on both annular walls of the annular plate 32. The cross-section of the annular storage groove 4 is semi-heart-shaped. The annular storage groove 4 facilitates the scraping of the inside of the filter cylinder 13 by the annular plate 32. Impurities are stored in the annular storage groove 4, reducing the secondary covering of impurities and the blockage of the inner wall of the filter cylinder 13.

[0039] An annular cavity 42 is formed on the annular plate 32. The annular cavity 42 is located between the two annular storage grooves 4. A plurality of discharge holes 43 are formed on both side walls of the annular plate 32. The discharge holes 43 communicate with the annular cavity 42. Both the moving column 3 and the connecting column 31 are hollow. A feed pipe 41 is provided at the end of the moving column 3. The feed pipe 41 is a flexible pipe. The feed pipe 41 communicates with the annular cavity 42 through the moving column 3 and the connecting column 31. The feed pipe 41 fills with materials such as water purifying agent, allowing the materials to enter the annular cavity 42 through the moving column 3 and the connecting column 31 and discharge through the discharge holes 43, and then mix with the rainwater to facilitate water purification treatment.

[0040] The upper and lower ends of the water inlet pipe 15 are respectively rotatably connected to the top end of the annular cylinder 12 and the bottom of the collection tank 11. A third bevel gear 5 is provided on the outer side wall of the water inlet pipe 15. A fourth bevel gear 51 is fixedly connected to the outer side wall of the filter cylinder 13 near one end of the annular cylinder 12. The third bevel gear 5 is meshed with the fourth bevel gear 51. A scraping plate 52 is fixedly connected to the bottom end of the collection tank 11, and the scraping plate 52 is located between the two conical filter meshes 16. Both sides of the scraping plate 52 are in mutual contact with the conical filter meshes 16. When the filter cylinder 13 rotates, the filter cylinder 13 drives the water inlet pipe 15 to rotate through the meshing of the third bevel gear 5 and the fourth bevel gear 51. The water inlet pipe 15 drives the conical filter meshes 16 to rotate, and the scraping plate 52 scrapes the material, facilitating the filtration of rainwater and avoiding the blockage of the conical filter meshes 16.

[0041] On both side walls of the square barrel 1, there are first fixing columns 61 fixedly connected. On the outer side wall of the annular disc 33, there is a first annular sliding groove 6. The first fixing column 61 is slidably connected in the first annular sliding groove 6. The cross-sections of the first fixing column 61 and the first annular sliding groove 6 are both T-shaped. On the inner annular wall of the annular disc 33, there are symmetrically distributed first crescent grooves 62. On the shaft body of the first rotating shaft 19, there are a pair of symmetrically distributed second grooves 63. In the second grooves 63, there is a first clamping block 64 fixedly connected by a spring. The end of the first clamping block 64 away from the spring is arc-shaped. When the servo motor 17 is started, through the settings of the first crescent groove 62 and the first clamping block 64, when the first rotating shaft 19 rotates clockwise, only the filter cylinder 13 rotates and the annular plate 32 does not work. When the servo motor 17 rotates counterclockwise regularly, the first rotating shaft 19 rotates counterclockwise, and both the filter cylinder 13 and the annular plate 32 work for scraping treatment. The regular scraping treatment is convenient for cleaning and at the same time avoids the influence of continuous scraping work on the discharging of the filter cylinder 13.

[0042] On the top end of the annular cylinder 12, there are a plurality of second fixing columns 66 fixedly connected. On the bottom of the third bevel gear 5, there is a second annular sliding groove 65. The second fixing column 66 is slidably connected in the second annular sliding groove 65. The cross-sections of the second fixing column 66 and the second annular sliding groove 65 are T-shaped. The water inlet pipe 15 passes through the third bevel gear 5. On the inner annular wall of the third bevel gear 5, there are a pair of radially arranged second crescent grooves 67. On the outer side wall of the water inlet pipe 15, there are a pair of radially arranged third grooves 68. In the third grooves 68, there is a second clamping block 69 fixedly connected by a spring. The end of the second clamping block 69 away from the spring is arc-shaped. When the servo motor 17 rotates clockwise, the water inlet pipe 15 and the conical filter net 16 do not work, avoiding the influence of the rotation of the conical filter net 16 on the water drainage of the collection tank 11. When rotating counterclockwise regularly, it is convenient for cleaning without affecting the filtration of the conical filter net 16.

[0043] An operation method of a roof water-saving device for green buildings includes the following steps:

[0044] S1: When starting the servo motor 17 through the starting part, the first bevel gear 2 and the second bevel gear 21 are engaged to drive the filter cylinder 13 to rotate, and then the rainwater and impurities are separated by centrifugal force;

[0045] S2: Drive the moving column 3 to move left and right through the circulating part, and drive the annular plate 32 to scrape the inner wall of the filter cylinder 13 to avoid the blockage of the filter cylinder 13;

[0046] S3: Clean the impurities in the filter cylinder 13. Open the cover body 14, and pull out the moving column 3, the connecting column 31 and the annular plate 32 as a whole from the filter cylinder 13. The impurities in the filter cylinder 13 are taken out by the annular plate 32 to complete the cleaning of the filter cylinder 13.

[0047] The above front, back, left, right, up, and down are all based on those in the attached drawings of the specificationFigure 1 Based on Figure 1 , with the perspective of observing the person as the standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0048] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A roof water-saving device for green buildings, characterized in that, It includes a square bucket (1). At the top of the square bucket (1), a plurality of collecting grooves (11) arranged side by side are fixedly connected. The cross-section of the collecting groove (11) is an inverted isosceles trapezoid. At the top of the inner wall of the square bucket (1), a plurality of annular cylinders (12) arranged side by side are fixedly connected through connecting rods. And the positions of the annular cylinders (12) and the collecting grooves (11) correspond one by one. Both ends of the annular cylinder (12) are rotatably connected with a filter cylinder (13). One ends of the two filter cylinders (13) far away from the annular cylinder (12) penetrate through the outer wall of the square bucket (1). The cylinder body of the filter cylinder (13) located inside the square bucket (1) has filter holes. The cylinder body of the filter cylinder (13) located outside the square bucket (1) is in a closed state. A cover body (14) is threadedly connected to the end of the filter cylinder (13) extending out of the square bucket (1). In the middle of the inner wall of the annular cylinder (12), an annular tapered block (18) is fixedly connected. At the top of the annular cylinder (12), a pair of water inlet pipes (15) symmetrically arranged with respect to the annular tapered block (18) are provided. The upper end of the water inlet pipe (15) is connected to the inner bottom of the collecting groove (11). The annular cylinder (12) is communicated with the collecting groove (11) through the water inlet pipe (15). A tapered filter screen (16) is fixedly connected to the upper end of the water inlet pipe (15). Servo motors (17) are fixedly installed on both side walls of the square bucket (1). A first rotating shaft (19) is installed on the output end of the servo motor (17). A first bevel gear (2) is fixedly connected to the first rotating shaft (19). A second bevel gear (21) is fixedly connected to the outer side wall of the filter cylinder (13) located on the square bucket (1). The first bevel gear (2) is meshed with the second bevel gear (21). The servo motor (17) is started through a starting member; The starting member includes an inclined groove (22). An inclined groove (22) is opened on the inclined side wall of the collecting groove (11). A sliding column (26) is slidably connected in the inclined groove (22). A floating ball (25) is fixedly connected to the end of the sliding column (26). A baffle (23) is fixedly connected to the inclined side wall of the collecting groove (11). The baffle (23) is located directly above the inclined groove (22). A pressure sensor (24) is fixedly connected to the bottom end of the baffle (23). A humidity sensor (27) is fixedly connected to the outer side wall of the collecting groove (11); A moving column (3) is slidably connected through the cover body (14). On the column body of the moving column (3) located inside the filter cylinder (13), a plurality of connecting columns (31) arranged side by side are fixedly connected. A plurality of coaxial annular plates (32) are slidably connected to the inner wall of the filter cylinder (13). The inner side wall of the annular plate (32) is fixedly connected to the connecting column (31). The moving column (3) moves left and right through a circulating member; The circulating part includes an annular disc (33). The annular disc (33) is provided on the first rotating shaft (19). An annular corrugated groove (34) is formed at the bottom end of the annular disc (33). A push rod (35) is fixedly connected to the column body outside the cover body (14) of the moving column (3). A first groove (36) is formed at the bottom end of the push rod (35). A U-shaped column (37) is slidably connected in the first groove (36). One end of the U-shaped column (37) is slidably connected in the annular corrugated groove (34). The other end of the U-shaped column (37) is connected to the first groove (36) through a spring.

2. The water-saving device for the roof of a green building according to claim 1, wherein, Annular storage grooves (4) are formed on both annular walls on both sides of the annular plate (32). The cross-section of the annular storage groove (4) is semi-heart-shaped.

3. The roof water-saving device for green buildings according to claim 2, characterized in that, An annular cavity (42) is formed on the annular plate (32). The annular cavity (42) is located between the two annular storage grooves (4). A plurality of discharge holes (43) are formed on both side walls of the annular plate (32). The discharge holes (43) communicate with the annular cavity (42). Both the moving column (3) and the connecting column (31) are hollow inside. A feed pipe (41) is provided at the end of the moving column (3). The feed pipe (41) is a flexible pipe. The feed pipe (41) communicates with the annular cavity (42) through the moving column (3) and the connecting column (31).

4. The water-saving device for the roof of a green building according to claim 3, characterized in that, The upper and lower ends of the water inlet pipe (15) are respectively rotatably connected to the top end of the annular cylinder (12) and the bottom of the collection tank (11). A third bevel gear (5) is provided on the outer side wall of the water inlet pipe (15). A fourth bevel gear (51) is fixedly connected to the outer side wall of the filter cylinder (13) near one end of the annular cylinder (12). The third bevel gear (5) is meshed with the fourth bevel gear (51). A scraping plate (52) is fixedly connected to the bottom end of the collection tank (11). And the scraping plate (52) is located between the two conical filter meshes (16). Both sides of the scraping plate (52) are in mutual contact with the conical filter meshes (16).

5. The water-saving device for the roof of a green building according to claim 4, characterized in that, First fixing columns (61) are fixedly connected to both side walls of the square bucket (1). A first annular sliding groove (6) is formed on the outer side wall of the annular disc (33). The first fixing column (61) is slidably connected in the first annular sliding groove (6). The cross-sections of both the first fixing column (61) and the first annular sliding groove (6) are T-shaped. Symmetrically distributed first crescent grooves (62) are formed on the inner annular wall of the annular disc (33). A pair of symmetrically distributed second grooves (63) are formed on the shaft body of the first rotating shaft (19). A first clamping block (64) is fixedly connected in the second groove (63) through a spring. One end of the first clamping block (64) away from the spring is arc-shaped.

6. The water-saving device for the roof of a green building according to claim 5, wherein, A plurality of second fixing columns (66) are fixedly connected to the top of the annular cylinder (12). A second annular sliding groove (65) is formed at the bottom of the third bevel gear (5). The second fixing columns (66) are slidably connected in the second annular sliding groove (65). The cross sections of the second fixing columns (66) and the second annular sliding groove (65) are T-shaped. The water inlet pipe (15) penetrates through the third bevel gear (5). A pair of second crescent grooves (67) are formed in the inner ring wall of the third bevel gear (5) in the radial direction. A pair of third grooves (68) are formed in the outer side wall of the water inlet pipe (15) in the radial direction. A second clamping block (69) is fixedly connected in the third groove (68) through a spring. The end of the second clamping block (69) away from the spring is arc-shaped.

7. The operating method of a roof water-saving device for green buildings according to claim 6, characterized in that It includes the following steps: S1: When the servo motor (17) is started by the starting member, the first bevel gear (2) and the second bevel gear (21) are engaged to drive the filter cylinder (13) to rotate, and then the rainwater and impurities are separated by centrifugal force. S2: The circulating member drives the moving column (3) to move left and right, and drives the annular plate (32) to scrape the inner wall of the filter cylinder (13) to prevent the blockage of the filter cylinder (13). S3: Clean the impurities in the filter cylinder (13). Open the cover body (14), and pull out the moving column (3), the connecting column (31) and the annular plate (32) as a whole from the filter cylinder (13). The impurities in the filter cylinder (13) are taken out by the annular plate (32) to complete the cleaning of the filter cylinder (13).

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