Green building roof structure of municipal engineering

Abstract

The invention relates to a green building roof structure of municipal engineering. The invention is suitable for the technical field of building roofs. The technical problem to be solved by the application is to provide a green building roof structure of municipal engineering. According to the technical scheme, the green building roof structure for municipal engineering comprises a fixed box, roof plates which are obliquely arranged are arranged on the two sides of the fixed box, side plates are arranged on the two sides of the roof plates, soil can be laid between the tops of the roof plates and the side plates, and vegetation can be planted in the soil; the flow slowing mechanisms are distributed at the top of the roof plate in a multi-stage mode and can block flowing of rainwater at the top of the roof plate stage by stage so as to slow down the flowing speed of the rainwater; the driving mechanism is arranged in any end of the fixed box, is in transmission connection with the flow slowing mechanism and can provide driving force for the flow slowing mechanism; the water collecting mechanism is arranged at the bottom of the roof plate and can filter and collect rainwater flowing down from the roof plate.

Description

Technical Field

[0001] This invention relates to the field of building roofing technology, and in particular to a green building roofing structure for municipal engineering projects. Background Technology

[0002] Rooftop greening can be broadly understood as the planting of trees and flowers on the roofs, terraces, balconies, or large artificial hills of various ancient and modern buildings, structures, city walls, bridges, etc. Rooftop greening is of great significance for increasing urban green space, improving the increasingly deteriorating human living environment; improving the current situation of urban high-rise buildings and the replacement of natural land and vegetation by hard paving of many roads; mitigating the harm to humans caused by excessive deforestation, urban heat island effect and sandstorms caused by various air pollution; expanding human green space, building garden cities, improving people's living conditions, improving quality of life, and beautifying the urban environment and improving ecological effects.

[0003] During the use of green roofs, heavy rains can cause soil loss due to erosion. This loss leads to two problems: firstly, the lack of soil hinders the growth of vegetation; secondly, the soil flowing from the roof to the ground pollutes the surrounding environment, causing inconvenience. Therefore, a green building roof structure for municipal engineering is proposed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a green building roof structure for municipal engineering, in view of the above-mentioned problems.

[0005] The technical solution adopted in this invention is: a green building roof structure for municipal engineering, comprising: The fixed box has roof panels arranged at an angle on both sides, and side panels on both sides of the roof panels. Soil can be laid between the top of the roof panels and the side panels, and vegetation can be planted in the soil. The flow-slowing mechanism is distributed in multiple stages on the top of the roof panel, which can block the flow of rainwater on the top of the roof panel step by step to slow down the flow of rainwater. The drive mechanism is located inside either end of the fixed box and is connected to the flow control mechanism, providing driving force to the flow control mechanism. The water collection mechanism, located at the bottom of the roof panel, is capable of filtering and collecting rainwater flowing down the roof panel.

[0006] By employing the aforementioned technical means and utilizing a multi-stage flow-damping mechanism in the roof panels, the rainwater flow rate can be gradually reduced, decreasing the erosion force on the soil and effectively preventing or reducing soil loss. The water collection mechanism filters and collects rainwater, lowering the risk of rainwater carrying soil directly into the ground and causing environmental pollution.

[0007] In some embodiments, the flow control mechanism includes a drive shaft, rotating blocks, and rotating plates. The inner walls of the two side plates are provided with multiple rotating grooves at intervals. The two ends of the drive shaft are rotatably connected to the rotating grooves. Multiple drive shafts are arranged parallel and at intervals on the top of the roof panel. The output end of the drive mechanism is connected to the same side end of the multiple drive shafts. Multiple rotating blocks are provided at intervals along the axial direction of the drive shaft. The rotating blocks on adjacent drive shafts are arranged alternately. Multiple rotating plates are provided at intervals along the circumferential direction on the outer wall of the rotating blocks.

[0008] In some embodiments, the rotating plate has a mounting cavity at the end away from the drive shaft, and a plurality of sliding ports communicating with the mounting cavity are provided on the top of the rotating plate. A plurality of telescopic rods are provided in the mounting cavity, and the ends of the telescopic rods are slidably connected to the corresponding sliding ports. The ends of the telescopic rods are connected to rotating blades, so that during the rotation of the drive shaft, the rotating blades can extend to the outside of the rotating plate under centrifugal force.

[0009] In some embodiments, a protective box is provided on the side wall of the side plate located on the same side as the drive mechanism, and the end of the drive shaft extends into the protective box. The ends of multiple drive shafts in the protective box are connected to the output end of the drive mechanism via belt drive.

[0010] In some embodiments, the drive mechanism includes a servo motor, a rotating shaft, a rotating rod, a rotating gear, a transmission component, and a self-starting component. One end of the interior of the fixed box has a motor slot, in which a servo motor is installed. The output end of the servo motor is connected to a rotating shaft extending through to the outside of the fixed box. A rotating rod, parallel to the rotating shaft, is rotatably connected to the end of the fixed box. The ends of the rotating shaft and the rotating rod are fitted with mutually meshing rotating gears. The rotating shaft and the rotating rod are respectively connected to the corresponding flow-regulating mechanism via a transmission component. A self-starting component is located on the top of the fixed box and is electrically connected to the servo motor. The self-starting component can collect some rainwater and start the servo motor when the rainwater reaches a preset volume.

[0011] In some embodiments, the self-starting assembly includes a water collection tank, a pressure plate, a pressure rod, a compression spring, a motor switch, and a water outlet. The water collection tank is installed on the top of the fixed box. The top of the water collection tank has an opening, and the inside has a cavity that can collect rainwater. The side wall of the water collection tank has a water outlet. The bottom of the water collection tank is connected to the pressure plate via a compression spring. The pressure plate is slidably connected inside the water collection tank. The bottom of the water collection tank has a motor switch, which is electrically connected to the servo motor. The bottom plate of the pressure plate has a pressure rod corresponding to the position of the motor switch.

[0012] In some embodiments, the water collection mechanism includes a water collection tank, a filter plate, a collection box, and a self-draining component. The bottom of the roof panel is provided with a water collection tank, the top of the water collection tank is detachably installed with a filter plate, and the two ends of the water collection tank are symmetrically installed with collection boxes. The wall of the collection box facing the filter plate is provided with an inlet. The bottom of the roof panel is also provided with a cleaning component, which can push the sludge on the filter plate into the collection box through the inlet. The water collection tank is provided with a self-draining component, which can discharge the water in the water collection tank when the water level inside the water collection tank reaches a preset water level threshold.

[0013] In some embodiments, the self-draining assembly includes a sliding plate and a telescopic spring. Water outlet pipes capable of communicating with the inside of the water collection tank are symmetrically installed at both ends of the water collection tank. A sliding plate is slidably installed in the vertical direction inside the water collection tank. The bottom of the sliding plate is connected to the inner bottom of the water collection tank via multiple telescopic springs.

[0014] In some embodiments, the cleaning assembly includes a baffle, a reciprocating screw, a threaded block, and a cleaning plate. The top of the roof panel is provided with a baffle. The two ends of the reciprocating screw are rotatably connected between the two side plates. The end of the reciprocating screw extends to the outside of the side plate and is drivenly connected to the output end of the drive mechanism. A threaded block is sleeved on the reciprocating screw. The side wall of the threaded block is connected to a cleaning plate that can abut against the top of the filter plate.

[0015] In some embodiments, the top of the water collection tank is provided with an installation groove, and multiple installation magnetic plates are fixedly connected to both sides of the filter plate. The outer side wall of the installation magnetic plate is slidably connected to the inner side wall of the installation groove. The installation groove is provided with a fixed magnetic block corresponding to the position of the installation magnetic plate, and the installation magnetic plate and the fixed magnetic block are magnetically connected.

[0016] The beneficial effects of this invention are: 1. Driven by a driving mechanism, the flow-retarding mechanism, arranged in multiple stages on the top of the roof panel, intercepts rainwater step by step, reducing the erosion effect of large amounts of rainwater on the soil in a short period of time and protecting the stability of the green layer. The rainwater is filtered and collected by the water collection mechanism, allowing it to be used for other purposes, improving water resource utilization, and preventing rainwater from directly carrying soil onto the ground and causing environmental pollution. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this application.

[0018] Figure 2 This is a cross-sectional structural diagram of this application.

[0019] Figure 3 This is a cross-sectional structural diagram of the protective box in this application.

[0020] Figure 4 This is a cross-sectional structural diagram of the rotating plate in this application.

[0021] Figure 5 It is in this application Figure 4 A magnified structural diagram of point A in the middle.

[0022] Figure 6 This is a top view of the fixed box structure in this application.

[0023] Figure 7 This is a cross-sectional structural diagram of the fixed box in this application.

[0024] Figure 8 This is a top view of the filter plate in this application.

[0025] Figure 9 This is a cross-sectional structural diagram of the water collection tank in this application.

[0026] Figure 10 This is a schematic diagram of the internal structure of the water collection tank in this application.

[0027] Explanation of reference numerals in the attached figures: 1. Fixed box; 2. Water collection tank; 3. Servo motor; 4. Water collection tank; 5. Roof panel; 6. Rotating plate; 201. Compression spring; 202. Pressure plate; 203. Motor switch; 204. Pressure rod; 301. Rotating shaft; 302. Protective box; 303. Transmission shaft; 304. Side plate; 305. Reciprocating screw; 306. Baffle; 307. Threaded block; 308. Cleaning plate; 309. Rotating block; 401. Filter plate; 402. Mounting magnetic plate; 403. Fixed magnetic block; 404. Water outlet pipe; 405. Collection box; 406. Telescopic spring; 407. Sliding plate; 601. Mounting cavity; 602. Telescopic rod; 603. Rotating blade; 3010. Rotating rod; 3011. Rotating gear.

[0028] This specification includes references to "one embodiment" or "implementation". The use of the phrase "in one embodiment" or "in an embodiment" does not necessarily refer to the same embodiment. Specific features, structures, or characteristics may be combined in any suitable manner consistent with this disclosure.

[0029] The term "comprising" is open-ended. As used in the appended claims, it does not exclude additional structures or steps.

[0030] "First," "second," etc. As used in this article, these terms serve as labels for the nouns preceding them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.). Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to specific embodiments.

[0032] Combination Figures 1 to 10 As shown, this embodiment is a green building roof structure for municipal engineering, including a fixed box 1, a flow-damping mechanism, a drive mechanism, and a water collection mechanism. The fixed box 1 has roof panels 5 arranged at an angle on both sides. Side panels 304 are provided on both sides of the roof panels 5. Soil can be laid between the top of the roof panels 5 and the side panels 304, and vegetation can be planted in the soil. A drive mechanism is located inside either end of the fixed box 1. Flow-damping mechanisms are distributed in a multi-level pattern on the top of the roof panels 5, spaced along the slope of the roof panels 5. The drive mechanism is connected to the flow-damping mechanisms, providing driving force to them. The flow-damping mechanisms can block the flow of rainwater on the top of the roof panels 5 to slow down the flow rate. A water collection mechanism is located at the bottom of the roof panels 5, filtering and collecting rainwater flowing down from the roof panels 5.

[0033] In some implementation schemes, such as Figure 1 , Figure 2 and Figure 3 As shown, the flow control mechanism includes a drive shaft 303, rotating blocks 309, and rotating plates 6. Multiple rotating grooves are spaced apart on the inner walls of the two side plates 304. The two ends of the drive shaft 303 are rotatably connected to these rotating grooves. Multiple drive shafts 303 are arranged parallel to each other and spaced along the slope on the top of the roof panel 5. The output end of the drive mechanism is connected to the same-side ends of the multiple drive shafts 303. Multiple rotating blocks 309 are spaced apart along the axial direction on each drive shaft 303. The rotating blocks 309 on adjacent drive shafts 303 are staggered. Multiple rotating plates 6 are spaced apart circumferentially on the outer walls of the rotating blocks 309. Specifically, in this embodiment, multiple ventilation holes are spaced through the inner walls of the two side plates 304.

[0034] Multiple rotating shafts 301 are driven by a drive mechanism. Due to the staggered arrangement of rotating blocks 309 among the multiple rotating shafts 301, and the small gap between the bottom of the rotating plate 6 on the outer wall of the rotating block 309 and the top of the roof panel 5, the speed of rainwater flowing down from the roof panel 5 is reduced, thereby reducing soil erosion on the roof panel 5 and improving the stable growth of vegetation on the roof panel 5. Furthermore, rainwater flows down from the roof panel 5 and enters the interior of the water collection mechanism through filtration.

[0035] Furthermore, such as Figure 4 and Figure 5 As shown, the rotating plate 6 has a mounting cavity 601 at the end away from the drive shaft 303. The top of the rotating plate 6 has multiple sliding ports that communicate with the mounting cavity 601. Multiple telescopic rods 602 are provided in the mounting cavity 601. The number of telescopic rods 602 corresponds to the number of sliding ports. The ends of the telescopic rods 602 are slidably connected to the corresponding sliding ports. The ends of the telescopic rods 602 are connected to rotating blades 603, so that during the rotation of the drive shaft 303, the rotating blades 603 can extend to the outside of the rotating plate 6 under centrifugal force.

[0036] In the initial state, due to the action of the telescopic rod 602, the rotating blade 603 retracts into the sliding opening, providing stable protection for the rotating blade 603. This reduces the corrosion caused by the rotating blade 603 being exposed to the outside air, thereby improving the performance and service life of the rotating blade 603. In this embodiment, the centrifugal effect of the rotating block 309 is greater than the telescopic force of the telescopic rod 602. Consequently, when the rotating block 309 rotates, the centrifugal force causes the rotating blade 603 to extend beyond the rotating plate 6, cutting and breaking up any mud clumps that may form, reducing the risk of mud clogging the roof drainage system.

[0037] In some implementation schemes, such as Figure 6 As shown, the drive mechanism includes a servo motor 3, a rotating shaft 301, a transmission component, and a self-starting assembly. A motor slot is provided at one end of the interior of the fixed box 1, and the servo motor 3 is installed in the motor slot. The output end of the servo motor 3 is connected to a rotating shaft 301 that extends through to the outside of the fixed box 1. A rotating rod 3010, which is arranged parallel to the rotating shaft 301, is rotatably connected to the end of the fixed box 1. Rotating gears 3011 are fitted onto the ends of the rotating shaft 301 and the rotating rod 3010, and are meshed with each other. The rotating shaft 301 and the rotating rod 3010 are respectively connected to the corresponding flow-slowing mechanism via the transmission component. A self-starting assembly is provided on the top of the fixed box 1. The self-starting assembly is electrically connected to the servo motor 3. The self-starting assembly can collect some rainwater and start the servo motor 3 when the rainwater reaches a preset volume.

[0038] Furthermore, in this embodiment, the transmission components include pulleys and belts. A protective box 302 is provided on the side wall of the side plate 304 located on the same side as the servo motor 3. The ends of the rotating shaft 301 and the rotating rod 3010 extend into the protective box 302. The outer walls of the rotating shaft 301 and the rotating rod 3010 are both fitted with pulleys. The pulleys on the rotating shaft 301 and the rotating rod 3010 are respectively connected to the ends of multiple transmission shafts 303 located in the protective box 302 on both sides of the fixed box 1 via belt transmission.

[0039] By setting up a protective box 302, the transmission components can be protected, preventing rainwater from directly corroding the mechanical parts and extending the system's lifespan. The rotating shaft 301 is driven by a servo motor 3. Since the rotating shaft 301 and the rotating rod 3010 are connected by a rotating gear 3011, the rotation directions of the rotating shaft 301 and the rotating rod 3010 are opposite. The rotating shaft 301 and the rotating rod 3010, respectively, drive multiple transmission shafts 303 within the corresponding protective boxes 302 to rotate synchronously via pulleys and belts. This ensures that the transmission shafts 303 within the two protective boxes 302 rotate in opposite directions, guaranteeing that all flow control devices work in a coordinated manner and improving the overall control effect.

[0040] Furthermore, such as Figure 7 As shown, the self-starting assembly includes a water collection tank 2, a pressure plate 202, a pressure rod 204, a compression spring 201, a motor switch 203, and a water outlet. The water collection tank 2 is installed on the top of the fixed box 1. The top of the water collection tank 2 has an opening, and the interior has a cavity with a connecting opening that can collect rainwater. The side wall of the water collection tank 2 has a water outlet. The bottom of the water collection tank 2 is connected to the pressure plate 202 via the compression spring 201. The pressure plate 202 is slidably connected to the inside of the water collection tank 2. The bottom of the water collection tank 2 has a motor switch 203, which is electrically connected to the servo motor 3. The bottom plate of the pressure plate 202 has a pressure rod 204 corresponding to the position of the motor switch 203. Specifically, in this embodiment, the motor switch 203 is a type of push-button switch. This type of switch is usually used to control the basic operations of the servo motor 3, such as starting, stopping, and reversing.

[0041] In case of rain: When rainfall is light, initially, the pressure plate 202 is located below the water outlet, and the motor switch 203 is disengaged from the pressure rod 204. Due to the light rainfall, rainwater flows into the water collection tank 2 and then out through the water outlet. Simultaneously, due to the small amount of rainwater at the water outlet, only a small amount of rainwater remains above the pressure plate 202. This small amount of rainwater is insufficient to cause the pressure rod 204 to press against the motor switch 203, therefore the servo motor 3 will not be driven. Furthermore, the small amount of rainwater can irrigate the vegetation on the roof panel 5, which is beneficial for the growth of the vegetation. At this time, it is not necessary to turn on the servo motor 3 to rotate the rotating block 309. After the vegetation has stabilized, the greening of the roof is enhanced.

[0042] When rainfall is heavy, rainwater flows into the water collection tank 2. Due to the large amount of rainfall, a large amount of water enters the water collection tank 2. At this time, the water flow rate from the outlet cannot keep up with the water collection rate of the water collection tank 2. Due to the gravity of the rainwater, the pressure plate 202 is pushed down. When the pressure plate 202 is pushed down, it drives the pressure rod 204 to press the motor switch 203. When the motor switch 203 is pressed, the servo motor 3 is powered on and starts. When the rain stops, the pressure plate 202 drives the pressure rod 204 to slide upward, causing the pressure rod 204 to disengage from the motor switch 203, thereby de-energizing the servo motor 3.

[0043] The system avoids inefficient operation by determining whether to activate the flow control system based on actual rainfall. It utilizes a purely mechanical sensing mechanism based on gravity and springs, ensuring high reliability. The motor only activates when needed, thus saving energy to some extent.

[0044] In some implementations, the water collection mechanism includes a water collection tank 4, a filter plate 401, a collection box 405, and a self-draining component. The water collection tank 4 is located at the bottom of the roof panel 5. The filter plate 401 is detachably installed on the top of the water collection tank 4. The filter plate 401 has multiple filter holes. The collection boxes 405 are symmetrically installed at both ends of the water collection tank 4. The wall of the collection box 405 facing the filter plate 401 has an inlet. The bottom of the roof panel 5 is also equipped with a cleaning component. The cleaning component can push the sludge on the filter plate 401 into the collection box 405 through the inlet. The water collection tank 4 is equipped with a self-draining component. The self-draining component can discharge the water in the water collection tank 4 when the water level inside the water collection tank 4 reaches a preset water level threshold.

[0045] Furthermore, such as Figure 8 and Figure 9 As shown, the top inner side of the water collection tank 4 is provided with an installation groove, and multiple installation magnetic plates 402 are fixedly connected to both sides of the filter plate 401. The outer side wall of the installation magnetic plate 402 is slidably connected to the inner side wall of the installation groove. The installation groove is provided with a fixed magnetic block 403 that corresponds to the position of the installation magnetic plate 402 and is attracted by opposite poles. The installation magnetic plate 402 and the fixed magnetic block 403 can be magnetically connected.

[0046] The magnetic connection between the installed magnetic plate 402 and the fixed magnetic block 403 in the mounting groove enables quick disassembly and installation of the filter plate 401, facilitating replacement or cleaning of the filter plate 401 and simplifying operation.

[0047] Furthermore, such as Figure 10 As shown, the self-draining assembly includes a sliding plate 407 and a telescopic spring 406. Water outlet pipes 404 that can connect to the inside of the water collection tank 4 are symmetrically installed at both ends of the water collection tank 4. The sliding plate 407 is slidably installed in the vertical direction inside the water collection tank 4. The bottom of the sliding plate 407 is connected to the bottom of the water collection tank 4 via multiple telescopic springs 406.

[0048] The water collection tank 4 collects not only rainwater flowing in from the roof panel 5, but also rainwater falling directly onto the filter plate 401. Initially, the sliding plate 407 is positioned above the outlet pipe 404. When rainwater enters the water collection tank 4 through the filter plate 401, the sliding plate 407 slides downwards due to gravity. When the sliding plate 407 reaches below the outlet pipe 404, the rainwater flows down through it. The guide effect of the outlet pipe 404 allows the rainwater to slowly flow down its wall, reducing the impact of the rainwater falling directly onto the ground. When the rain stops, the sliding plate 407 rises. Because there is a space between the sliding plate 407 and the filter plate 401, a certain amount of water can be stored. The filter plate 401 then filters out soil residue within the stored water, preventing rainwater from mixing with soil and becoming unusable. This facilitates the use of the collected rainwater for other purposes.

[0049] Furthermore, such as Figure 2 and Figure 3 As shown, the cleaning assembly includes a baffle 306, a reciprocating screw 305, a threaded block 307, and a cleaning plate 308. The top of the roof panel 5 is provided with a baffle 306. The two ends of the reciprocating screw 305 are rotatably connected between the two side plates 304. The end of the reciprocating screw 305 extends into the protective box 302 and is connected to the rotating shaft 301 or the rotating rod 3011 via belt drive. The threaded block 307 is sleeved on the reciprocating screw 305. The side wall of the threaded block 307 is connected to a cleaning plate 308 that can abut against the top of the filter plate 401.

[0050] The servo motor 3 is connected to the reciprocating screw 305 via a transmission component. When the servo motor 3 is started, the reciprocating screw 305 rotates synchronously, driving the threaded block 307 on the reciprocating screw 305 to reciprocate. When the threaded block 307 moves to the end of the reciprocating screw, it will naturally change its direction of movement. This part is a conventional technical means. Thus, the threaded block 307 drives the cleaning plate 308 to clean the soil residue on the top of the filter plate 401. The soil residue is scraped off by the cleaning plate 308 and enters the collection box 405 through the inlet, preventing the soil residue from falling directly to the ground and polluting the surrounding environment.

[0051] The implementation principle of a green building roof structure for a municipal engineering project is as follows: By sensing rainfall and controlling the start and stop of the servo motor 3 via a self-starting component, a flow-regulating mechanism installed on the sloping roof panel 5 can be activated in the event of heavy rainfall. When the rainfall is heavy, the servo motor 3 starts, driving the drive shaft 303 to rotate, thereby causing the rotating block 309 and the rotating plate 6 to rotate accordingly. Because the gap between the bottom of the rotating plate 6 and the top of the roof panel 5 is small, it can effectively block and disperse the fast-flowing rainwater, reduce its flow velocity, and reduce the direct impact on the soil layer.

[0052] Multiple drive shafts 303 achieve multi-level, layered rainwater interception. The staggered arrangement of rotating blocks 309 and rotating plates 6 forms multi-layered barriers, effectively extending the time rainwater remains on the roof surface. Simultaneously, as the drive shafts 303 rotate, the rotating plates 6 of the rotating blocks 309 on the drive shafts 303 periodically and continuously cut into the flowing rainwater. Because the gap between the rotating plates 6 and the soil on the roof slab 5 is small, it effectively separates large streams of rainwater into smaller streams or trickles, causing the rainwater to fall in a "stepped" manner, thus reducing the direct impact on the soil layer and lowering the possibility of soil erosion. At the same time, this intermittent blocking also helps more water infiltrate into the soil, which is beneficial for vegetation to absorb water and nutrients, promoting its healthy growth.

[0053] The water collection mechanism located below the roof panel 5 can collect rainwater after preliminary filtration, which not only reduces the risk of sediment being washed away by rainwater and polluting the environment, but also allows the collected water resources to be reused. At the same time, it works in conjunction with the cleaning component to clean the filter plate 401, ensuring the effective operation of the filter plate 401.

[0054] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A green building roof structure of a municipal work, characterized by, The utility model relates to a fixed box (1) is provided with inclined roof board (5) on both sides, and the both sides of roof board (5) are provided with side plate (304), and the top of roof board (5) and side plate (304) can be paved soil, and the soil can be planted vegetation, The slow flow mechanism is distributed on the top of the roof board (5) in multiple stages, and can gradually block the flow of rainwater on the top of the roof board (5) to slow down the flow speed of rainwater. The driving mechanism is arranged in the interior of any end of the fixed box (1) and is in transmission connection with the slow flow mechanism, and can provide driving force for the slow flow mechanism. The water collecting mechanism is arranged at the bottom position of the roof board (5) and can filter the rainwater flowing down on the roof board (5) and collect. The slow flow mechanism includes a transmission shaft (303), a rotating block (309) and a rotating plate (6), a plurality of rotating grooves are arranged at intervals in the inner wall of the both side side plates (304), the transmission shaft (303) is rotatably connected to the rotating grooves at both ends, a plurality of transmission shafts (303) are arranged in parallel and at intervals on the top of the roof board (5), the output end of the driving mechanism is in transmission connection with the same side end of the plurality of transmission shafts (303), a plurality of rotating blocks (309) are arranged at intervals on the transmission shaft (303) along the axial direction of the transmission shaft (303), the rotating blocks (309) on the adjacent transmission shafts (303) are arranged in a staggered manner, and a plurality of rotating plates (6) are arranged at intervals on the outer wall of the rotating block (309) in the circumferential direction.

2. The green building roof structure of municipal engineering according to claim 1, characterized in that: The end of the rotating plate (6) away from the transmission shaft (303) is provided with a mounting cavity (601), the top of the rotating plate (6) is provided with a plurality of sliding openings in communication with the mounting cavity (601), a plurality of telescopic rods (602) are arranged in the mounting cavity (601), the end of the telescopic rod (602) is in sliding connection with the corresponding sliding opening, and the end of the telescopic rod (602) is connected with a rotating blade (603), so that the rotating blade (603) can extend to the outside of the rotating plate (6) under the centrifugal force during the rotation of the transmission shaft (303).

3. The green building roof structure of municipal engineering according to claim 2, characterized in that: The side wall of the side plate (304) on the same side of the driving mechanism is provided with a protection box (302), the end of the transmission shaft (303) extends into the protection box (302), and the ends of the plurality of transmission shafts (303) in the protection box (302) and the output end of the driving mechanism are in transmission connection through a belt.

4. The green building roof structure of municipal engineering according to claim 2, characterized in that: ​ 5. The green building roof structure of municipal engineering according to claim 1, characterized in that: The driving mechanism includes a servo motor (3), a rotating shaft (301), a rotating rod (3010), a rotating gear (3011), a transmission member and a self-starting assembly, one end of the fixed box (1) is provided with a motor slot, the servo motor (3) is installed in the motor slot, the output end of the servo motor (3) is connected with the rotating shaft (301) extending through to the outside of the fixed box (1), the fixed box (1) is rotatably connected with the rotating rod (3010) capable of being arranged in parallel with the rotating shaft (301), the end portions of the rotating shaft (301) and the rotating rod (3010) are sleeved with the rotating gears (3011) connected with each other, the rotating shaft (301) and the rotating rod (3010) are respectively connected with the corresponding side of the slow flow mechanism through the transmission member, the top of the fixed box (1) is provided with the self-starting assembly, the self-starting assembly is electrically connected with the servo motor (3), and the self-starting assembly can receive part of the rainwater and start the servo motor (3) when the rainwater reaches a preset water amount.

6. The green building roof structure of municipal engineering according to claim 5, characterized in that: The self-starting assembly includes a water collecting box (2), a pressing plate (202), a pressing rod (204), a compression spring (201), a motor switch (203) and a water outlet hole, the top of the fixed box (1) is provided with the water collecting box (2), the top of the water collecting box (2) is provided with an opening, the inside is provided with a cavity capable of receiving rainwater, the side wall of the water collecting box (2) is provided with a water outlet hole, the inner bottom of the water collecting box (2) is connected with the pressing plate (202) through the compression spring (201), the pressing plate (202) is slidably connected in the water collecting box (2), the inner bottom of the water collecting box (2) is provided with the motor switch (203), the motor switch (203) is electrically connected with the servo motor (3), and the bottom plate of the pressing plate (202) is provided with the pressing rod (204) corresponding to the position of the motor switch (203).

7. The green building roof structure of municipal engineering according to claim 1, characterized in that: The water collecting mechanism includes a water collecting box (4), a filter plate (401), a collecting box (405) and a self-draining assembly, the bottom of the roof plate (5) is provided with the water collecting box (4), the top of the water collecting box (4) is detachably provided with the filter plate (401), the two ends of the water collecting box (4) are symmetrically provided with the collecting box (405), the wall surface of the collecting box (405) facing the filter plate (401) is provided with an inlet, and the bottom of the roof plate (5) is also provided with a cleaning assembly, the cleaning assembly can push the sludge on the filter plate (401) into the collecting box (405) through the inlet, and the inside of the water collecting box (4) is provided with the self-draining assembly, which can drain the water in the water collecting box (4) when the water level in the water collecting box (4) reaches a preset water level threshold.

8. The green building roof structure of municipal engineering according to claim 7, characterized in that: The self-draining assembly includes a sliding plate (407) and an extension spring (406), the two ends of the water collecting box (4) are symmetrically provided with a water outlet pipe (404) capable of communicating with the inside of the water collecting box (4), the sliding plate (407) is slidably installed in the water collecting box (4) along the vertical direction, and the bottom of the sliding plate (407) is connected with the inner bottom of the water collecting box (4) through a plurality of extension springs (406).

9. The green building roof structure of municipal engineering according to claim 7, characterized in that: The cleaning assembly comprises a baffle (306), a reciprocating screw rod (305), a threaded block (307) and a cleaning plate (308), the top of the roof board (5) is provided with the baffle (306), the two ends of the reciprocating screw rod (305) are rotatably connected between the side plates (304) on the two sides, the end of the reciprocating screw rod (305) extends to the outside of the side plate (304) and is in transmission connection with the output end of the driving mechanism, the threaded block (307) is sleeved on the reciprocating screw rod (305), and the side wall of the threaded block (307) is connected with the cleaning plate (308) capable of abutting against the top of the filter plate (401).

10. The green building roof structure of municipal engineering according to claim 7, characterized in that: The top of the water collecting tank (4) is provided with a mounting groove, a plurality of mounting magnetic plates (402) are fixedly connected on the two sides of the filter plate (401), the outer side wall of the mounting magnetic plate (402) is in sliding connection with the inner side wall of the mounting groove, the inside of the mounting groove is provided with a fixed magnetic block (403) corresponding to the position of the mounting magnetic plate (402), and the mounting magnetic plate (402) and the fixed magnetic block (403) are in magnetic connection.

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