CN213204728U - Roof drainage structure for limiting rainwater and roof structure thereof - Google Patents

Abstract

The application discloses a roofing drainage structures and roofing structure for rainwater current-limiting, wherein this roofing structure includes: the roof is the top surface of a building; the rainwater hopper is arranged on the roof and communicated with a drainage pipeline of the building; the rainwater storage device comprises a plurality of water storage disks, wherein the plurality of water storage disks are arranged on a roof so as to divide the roof into a first area formed by the water storage disks and a second area which is positioned outside the water storage disks and is directly communicated with a rainwater hopper, and water outlet holes communicated with the first area and the second area are formed in the side wall of each water storage disk. According to the technical scheme of this application, the roofing has formed first region and second region respectively by the inboard and the outside of catch basin to the regional rainwater in rainwater fill place is discharged fast, and the rainwater in other regions need be via delivery port restriction velocity of flow entering rainwater fill place region, and then realizes the control to roof surface drainage speed, with the risk that reduces the urban waterlogging.

Description

Roof drainage structure for limiting rainwater and roof structure thereof

Technical Field

The application relates to the field of roof drainage, in particular to a roof drainage structure for limiting rainwater and a roof structure thereof.

Background

At present, along with the improvement of the drainage requirement of a building, the top drainage of the building is usually realized by using a rainwater hopper (such as a siphon rainwater hopper) so as to efficiently and quickly discharge rainwater on a roof, thereby reducing the probability of roof water leakage and lightening the roof waterproof pressure.

In general, the existing drainage mode can achieve the purpose of quickly draining rainwater on the surface of a roof. However, in extreme weather occasions, such as instantaneous thunderstorm or rainstorm, most roof rainwater is quickly discharged to the ground, so that rainwater on the roof is greatly discharged and collected in a short time, and a great pressure is brought to a road surface drainage system, and the urban waterlogging risk is increased.

Therefore, how to provide a drainage scheme capable of controlling the drainage of the roof surface at least to a certain extent is a technical problem to be solved in the field.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present application provides a roof drainage structure for limiting rainwater flow and a roof structure thereof, so as to provide a drainage scheme capable of controlling drainage on a roof surface at least to a certain extent.

According to the application, a roofing structure for rainwater current-limiting is provided, which roofing structure comprises: the roof is the top surface of a building; the rainwater hopper is arranged on the roof and communicated with a drainage pipeline of the building; the rainwater storage device comprises a plurality of water storage disks, wherein the plurality of water storage disks are arranged on a roof so as to divide the roof into a first area formed by the water storage disks and a second area which is positioned outside the water storage disks and is directly communicated with a rainwater hopper, and water outlet holes communicated with the first area and the second area are formed in the side wall of each water storage disk.

Preferably, the water outlet hole is a circular hole, an elliptical hole, a rectangular hole or a square hole.

Preferably the reservoir comprises a plurality of tray side walls which are arranged end to end and sealingly to the roof to form the first region.

Preferably, the water storage disc comprises a tray bottom and a tray side wall, the tray side wall is perpendicular to the tray bottom and extends for a circle along the edge of the tray bottom, so that the water storage disc with an open upper part is formed, and the water outlet hole is formed in the tray side wall and is adjacent to the tray bottom.

Preferably, the height of the tray side walls is lower than the height of the edge of the roof.

Preferably, the top end of the tray side wall is provided with a flange extending towards the outside of the reservoir.

Preferably the tray bottom is adhered to the roof.

Preferably, the water storage disc comprises a plurality of water outlet holes, and the water outlet holes are uniformly arranged at the bottom of the side wall of the tray at intervals.

Preferably, the reservoir comprises a mesh cover which is detachably arranged in an opening above the reservoir to prevent impurities from entering the inner side of the reservoir.

According to another aspect of the present application there is provided a roof drainage structure comprising: the roof structure for limiting the flow of rainwater is any one of the roof structures for limiting the flow of rainwater; the flow limiting cover is fixedly covered on a rainwater hopper in the roof structure and comprises a hollow cover body and at least one flow limiting opening arranged on the cover body.

According to the technical scheme of this application, the roofing has formed first region and second area respectively by the inboard and the outside of water storage disc, is provided with the apopore of intercommunication between first region and the second area. The rainwater in the area where the rainwater hopper is located can be quickly discharged, and the rainwater in other areas can only flow to the area where the rainwater hopper is located through the water outlet hole when the accumulated water quantity does not reach the height of the water storage disc; and after the accumulated water amount exceeds the height of the water storage disc, the rainwater can quickly flow to the area where the rainwater hopper is located. Therefore, the drainage speed is controlled when the rainfall is small, the rainwater can be quickly discharged when the rainfall is accumulated excessively, and the drainage speed of the roof surface is controlled to reduce the urban waterlogging risk.

Additional features and advantages of the present application will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate an embodiment of the invention and, together with the description, serve to explain the invention. In the drawings:

FIG. 1 is a schematic view of a flow restricting hood for a rain scoop according to a preferred embodiment of the present application;

FIG. 2 is a schematic view of a flow restricting hood for a rain scoop according to another preferred embodiment of the present application;

FIG. 3 is a schematic view of the flow restricting cover for a rain scoop of FIG. 1 with a screen;

fig. 4 is a schematic view of a rainwater hopper device according to a preferred embodiment of the present application;

FIG. 5 is a schematic view of a roof drainage structure for rainwater flow restriction according to a preferred embodiment of the present application;

FIG. 6 is an enlarged view of a portion of FIG. 5;

FIGS. 7 and 8 are schematic views of a restrictor plate according to a preferred embodiment of the present application;

FIG. 9 is a schematic view of a roof drainage structure for rainwater flow restriction according to another preferred embodiment of the present application;

FIG. 10 is a schematic view of a reservoir according to a preferred embodiment of the present application;

FIG. 11 is a schematic view of a reservoir according to another preferred embodiment of the present application;

fig. 12 is a schematic view of the reservoir tray of fig. 10 with a screen.

Detailed Description

When rainfall occurs, rainwater can uniformly fall on the roof and the road surface of a building, the buildings in the city are more, and if the rainwater falling on the roof is discharged in a large amount in a short time, the rainwater can bring large pressure to a road surface drainage system. Especially in the weather of instantaneous thunderstorm or rainstorm, the rapid accumulation of rainwater caused by a large amount of rainfall in a short time, such as the continuous rapid drainage of rainwater on the roof of a building, can cause the risk of urban waterlogging to increase.

In order to solve the problems, the drainage of the roof surface needs to be controlled, and the drainage speed of the roof is limited within the waterproof capacity range of the roof. To achieve this, the present application proposes drainage schemes that are capable of controlling, at least to some extent, the drainage of roof surfaces, both in terms of rain gutters for roof drainage and in terms of roof construction.

The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Rainwater hopper device and current-limiting cover thereof

As shown in fig. 1, a current-limiting cover for a rainwater hopper, the current-limiting cover comprising: a cover body 10, wherein the cover body 10 is a hollow cylindrical body; the mounting plate 11 is fixedly arranged at the bottom of the cover body 10, and is used for fixing the cover body 10 above the rainwater hopper; wherein, the cover body 10 is provided with at least one flow restriction port 12, and the flow restriction port 12 penetrates through the inner side and the outer side of the cover body 10. The current-limiting cover fixes the cover body 10 above a rainwater hopper on the roof of a building through a mounting plate 11 arranged at the bottom of the cover body 10, so that rainwater accumulated on the roof needs to flow into the rainwater hopper through the current-limiting cover. When the accumulated rainwater is lower than the cover 10 in the process of flowing into the cover 10 from the outer side of the cover 10, the rainwater can only flow into the cover 10 through the flow-limiting port 12 and is discharged by a rainwater hopper; when the rainwater accumulation height exceeds the cover body 10 height, rainwater can rapidly flow into the inner side of the cover body 10 from the upper part of the hollow cover body 10, and is rapidly discharged by a rainwater hopper. Therefore, the current-limiting cover for the rainwater hopper realizes effective control on the rainwater discharge speed of the roof. When meeting the environment of strong rainfall for a short time, the roof rainwater accumulation height can slow down the rainwater discharge speed according to the size of the flow-limiting opening 12 as long as the height of the cover body 10 of the flow-limiting cover is not exceeded, and further the urban waterlogging risk is reduced.

The material of the flow-limiting cover can be plastic or preferably metal material such as aluminum, stainless steel and the like. The mounting plate 11 is preferably provided with attachment structures, such as mounting holes, for attachment to the roof by means of attachment members. The cross-sectional shape of the cover 10 may be a cylindrical body of a triangle, a rectangle, a circle or an ellipse according to the shape of the rainwater hopper. Preferably, the shield 10 is a cylinder with a polygonal cross-sectional shape, as shown in fig. 1, and at least one side wall of the cylinder is provided with a flow restriction 12, or, as shown in fig. 2, the shield 10 is a cylinder with a circular shape, and the flow restriction 12 is preferably a radial opening distributed on the side wall of the shield 10.

According to the above-mentioned current-limiting cover for a rain scoop, the cover body 10 can be a standard cylindrical or polygonal cylindrical body, that is, the cross-sectional area of the cover body 10 is uniform from the bottom to the top, or preferably, the cross-sectional area of the cover body 10 is gradually increased from the bottom to the top, so that after the rainwater accumulation height exceeds the height of the cover body 10, rainwater can more rapidly flow into the rain scoop from the upper opening of the cover body 10, thereby preventing the rainwater from exceeding the bearing range of the roof due to overlarge rainfall in a short time.

The restriction 12 of the restriction cover can be one, and the one restriction 12 preferably extends from the bottom to the top of the cover body 10, so that the flux of the restriction 12 is increased synchronously according to the increase of the rainwater accumulation height of the roof. Preferably, as shown in fig. 1 and 2, there are a plurality of flow restricting ports 12, and the plurality of flow restricting ports 12 are distributed at the same or different height positions on the cover body 10, so that when there is a foreign object blocking part of the flow restricting ports 12, the other flow restricting ports 12 can not be interfered, thereby improving the reliability of the flow restricting cover. Preferably, the plurality of flow restrictions 12 are distributed at different height positions on the cover 10, and the flow restriction 12 at different height positions may have the same or different flow areas. Preferably, the flow restriction 12 at a lower elevation forms a smaller flow area than the flow restriction 12 at a higher elevation. Therefore, when the short-term rainfall is large, the flow limiting cover allows the rainwater to flow into the flow limiting cover through the flow limiting opening 12 faster along with the rising of the water level accumulated on the roof, so that the effect of automatically adjusting the flow limiting along with the height of the water level is achieved. The plurality of flow restricting ports 12 may be overlapped or separated in the height direction. Preferably, as shown in fig. 1, the plurality of flow restricting ports 12 are continuously distributed in the height direction, that is, the lowest point of the higher flow restricting port 12 is the same as the highest point of the lower flow restricting port 12 in two adjacent flow restricting ports 12 in the height direction, so that the flow restricting cover can provide a stably-changing flow restricting effect according to the height change of the water level even if the plurality of flow restricting ports 12 are distributed at different positions or on different surfaces of the same surface. In the above-mentioned current-limiting cover for a rain scoop, the current-limiting opening 12 may be a circular hole, an elliptical hole, a rectangular hole or a square hole, preferably a rectangular hole with equal width.

The roofing exposes outside throughout the year, and difficult to avoid can have the foreign matter to appear, and in the rainfall process, if the foreign matter flows to rainwater fill department along with the rainwater and can lead to the rainwater fill to block up, influences the roofing drainage. Therefore, in the case of the above-described embodiment of the current-limiting cover for a rain scoop, as shown in fig. 3, the current-limiting cover of the present application preferably includes a screen 13, and the screen 13 is disposed at least one of the top opening of the cover body 10 and the current-limiting opening 12. Most foreign matters can not fall into the inner side of the flow limiting cover through the filter screen 13, so that the effect of preventing the rainwater hopper from being blocked is achieved. Depending on the actual environment, the strainer 13 may be provided only at one of the top opening of the cover 10 and the flow restriction 12, or the strainer 13 may be provided at both the top opening of the cover 10 and the flow restriction 12.

Having described in detail the current-limiting cover for a rain boot in accordance with various embodiments of the present application, the present application provides a rain boot device, as shown in fig. 4, comprising a rain boot 14 disposed at a roof drain opening, and a current-limiting cover fixedly covering the rain boot 14, wherein the current-limiting cover is the current-limiting cover of any of the embodiments described above. Wherein the rain scoop 14 is preferably positioned below the roof surface to facilitate the collection of rain water at the rain scoop. The rain hopper 14 may be a type 87 rain hopper, a type 79 rain hopper, a type 65 rain hopper, etc. which are common in the field of roof drainage, or preferably a siphon type rain hopper, so as to enable rapid drainage of rainwater flowing to the rain hopper.

According to the rainwater hopper device of the preferred embodiment of the present application, the mounting plate 11 of the current-limiting cover is fixed on the roof around the rainwater hopper and is hermetically connected with the roof, so that the cover body 10 is fixed above the rainwater hopper, and therefore rainwater lower than the cover body 10 can only flow into the inner side of the cover body 10 through the current-limiting port 12 and is discharged by the rainwater hopper, so as to control the drainage speed of rainwater on the roof. When the height of the rainwater accumulated on the roof exceeds the height of the cover body 10, the rainwater quickly flows in through the opening at the top of the cover body 10 and is quickly discharged by the rainwater hopper, so that the rainwater is prevented from causing excessive pressure on the roof.

The application provides a rainwater fill device and current-limiting cover for roof in the foregoing, has realized carrying out effective control to the discharge rate of roofing rainwater, reduces the effect of urban waterlogging risk. In addition to improvements made to roof gutters, roof structures can also be improved to achieve similar technical effects, and the roof drainage structure for limiting rainwater and the roof structure thereof will be described in detail later.

Roof drainage structure for limiting rainwater and roof structure thereof

1. Current limiting plate

As shown in fig. 5 and 6, the present application provides a roofing structure for limiting the flow of rainwater, the roofing structure comprising: a roof 20, the roof 20 being a roof of a building; a rainwater hopper 14, wherein the rainwater hopper 14 is arranged on the roof 20 and communicated with a drainage pipeline of a building; at least one current limiting plate 21, wherein the current limiting plate 21 is hermetically arranged on the roof 20, and the plane of the current limiting plate 21 is inclined or vertical to the roof 20 so as to divide the roof 20 into a plurality of water storage areas; wherein the restrictor plate 21 is provided with a through-hole 22 for communicating adjacent water storage areas. In the technical scheme, a plurality of water storage areas are separated on the roof 20 by at least one current limiting plate 21, and when the rainwater storage height does not exceed the height of the current limiting plate, rainwater can only flow among the water storage areas through a through hole 22 for communicating adjacent water storage areas, so that the rainwater hopper 14 can only quickly discharge rainwater flowing to the water storage area where the rainwater hopper is located; and when the rainwater is amassed highly to surpass the current-limiting plate 21 height, the rainwater can flow to rainwater fill place retaining area through the top of current-limiting plate fast again to be drained away by the rainwater fill fast, in order to prevent to cause too big bearing pressure to the roofing, thereby realized the control to roof surface drainage speed, in order to reduce urban waterlogging risk.

In this embodiment, the restrictor plate 21 may be made of plastic, or preferably made of metal such as aluminum or stainless steel. The through hole 22 of the restrictor plate 21 may be a circular hole, an elliptical hole, a rectangular hole, or a square hole. The number of the through holes 22 is preferably plural, and the plural through holes 22 may be located at the bottom of the restrictor plate 21 in the height direction, or may be located at other positions between the bottom and the top of the restrictor plate 21. Preferably, the current-limiting plate 21 is provided with a plurality of through holes 22, and the plurality of through holes 22 are uniformly spaced from the bottom of the current-limiting plate 21 near the roof 20.

The distribution of the current-limiting plates 21 that divide the roof 20 into a plurality of water-storage areas can be selected according to the actual working conditions, and as shown in fig. 5, both ends of the current-limiting plates 21 can be abutted against the edge 25 of the roof 20, or one end of each of both ends of the current-limiting plates 21 is abutted against the edge 25 of the roof 20 and the other end is abutted against the other current-limiting plate 21, or both ends of the current-limiting plates 21 are abutted against the other current-limiting plates 21. Preferably, the plurality of flow restriction plates 21 are parallel to each other, and the plurality of flow restriction plates 21 are uniformly spaced from each other on the roof 20, so as to divide the roof into a plurality of water storage areas uniformly, and when the amount of rainwater does not exceed the flow restriction plates 21, rainwater can only flow through the through holes 22 between adjacent water storage areas, thereby controlling the rainwater discharge speed.

According to the roofing structure for rainwater flow restriction as described above, the restrictor plate 21 may be a plate-shaped member fixedly installed on the roof 20, or preferably, as shown in fig. 7 and 8, the restrictor plate 21 includes a baffle plate 23 installed perpendicular to or inclined with respect to the roof 20, and a bottom plate 24 extending parallel to the roof 20 and along the bottom of the baffle plate 23. Wherein the bottom plate 24 is used as a mounting base of the current limiting plate 21 for fixing with the roof 20, and the through hole 22 is preferably arranged at the bottom of the baffle plate 23 adjacent to the bottom plate 24. The bottom plate 24 is preferably provided with a coupling structure, such as a mounting hole, so that the bottom plate 24 is fixed to the roof 20 by a coupling member, or the bottom plate 24 is fixed to the roof 20 by a fixing connection means, such as welding or bonding.

As shown in fig. 5, the height of the baffles 23 is preferably below the height of the edge 25 of the roof 20 so that rainwater accumulated at a height above the baffles 23 is still confined to the roof of the building and flows quickly to the storage area where the rainwater hopper 14 is located.

The baffle 23 of the restrictor plate 21 can be fixed at any position in the width direction of the bottom plate 24, and preferably, as shown in fig. 7 and 8, the baffle 23 of the restrictor plate 21 and the bottom plate 24 together form an L-shaped cross section, so as to facilitate processing and reduce production cost. The baffle 23 and the bottom plate 24 may be integrally formed as a sheet metal part with a through hole 22, or the baffle 23 may be detachably mounted on the bottom plate 24, so as to adjust the roof structure according to the change of the climate environment (mount or dismount the baffle 23). In the case where the blocking plate 23 is detachably attached to the base plate 24, a coupling structure such as a pin groove is provided between the blocking plate 23 and the base plate 24.

According to the roof structure for limiting rainwater in the preferred embodiment, the roof 20 is divided into a plurality of water storage areas by the current limiting plates, when the rainwater storage height of the roof does not exceed the current limiting plates 21, rainwater in the water storage area where the rainwater hopper 14 is located can be quickly discharged, and rainwater in other water storage areas needs to flow to the water storage area where the rainwater hopper 14 is located through the through holes 22 with limited apertures, so that the rainwater discharge speed of the roof is controlled according to the flux of the through holes 22.

Based on above-mentioned roofing structure for rainwater current-limiting that has current-limiting plate 21, through combining with the rainwater fill device described in the foregoing, this application provides a roofing drainage structures, and this roofing drainage structures includes: a roof structure for limiting flow of rainwater, the roof structure for limiting flow of rainwater being a roof structure for limiting flow of rainwater as described in any of the above embodiments; and a flow-restricting hood fixedly attached to the storm drain 14 in the roof structure, the flow-restricting hood comprising a flow-restricting hood according to any of the embodiments described above.

2. Water storage tray

In addition to the roof structure comprising the current-limiting plate 21, the regional current-limiting discharge of roof rainwater can also be realized in other manners. According to another embodiment of the present application, as shown in fig. 9, the roofing structure for limiting rainwater includes: a roof 20, the roof 20 being a roof of a building; a rainwater hopper 14, wherein the rainwater hopper 14 is arranged on the roof 20 and communicated with a drainage pipeline of a building; a plurality of water storage trays 30, the plurality of water storage trays 30 being arranged on the roof 20 to divide the roof 20 into a first region 301 formed by the water storage trays 30 and a second region 302 located outside the water storage trays 30 and directly communicating with the rainwater hopper 14, wherein the side wall of the water storage trays 30 is provided with a water outlet hole 34 communicating the first region and the second region. In this embodiment the roof is formed by the inner and outer sides of a plurality of water storage trays 30 to form a first area 301 and a second area 302 respectively, with a communicating outlet aperture 34 being provided between the first area 301 and the second area 302. The rainwater in the area where the rainwater hopper 14 is located can be quickly discharged, and the rainwater in other areas can only flow to the area where the rainwater hopper 14 is located through the water outlet hole when the accumulated water amount does not reach the height of the water storage disc 30; after the accumulated water amount exceeds the height of the water storage tray 30, the rainwater can rapidly flow to the area where the rainwater hopper 14 is located. Therefore, the drainage speed is controlled for a certain amount of rainwater, rainwater can be quickly discharged when the rainwater is stored too much, and the drainage control on the surface of the roof is further realized. The rain scoop 14 may also be disposed in the first area 301, and in the case that the rain scoop 14 is disposed in the first area 301, the water storage tray 30 in which the rain scoop 14 is disposed serves a similar function as the flow restricting cover described above. The water outlet holes 34 of the water storage tray 30 may be circular holes, elliptical holes, rectangular holes or square holes, and one water outlet hole 34 may be provided, or as shown in fig. 11, a plurality of water outlet holes 34 facing different directions may be provided in one water storage tray 30.

There are two preferred embodiments of the reservoir tray 30 according to the roofing structure for rainwater flow restriction. In one embodiment, the reservoir tray 30 preferably includes a plurality of tray side walls 32, the plurality of tray side walls 32 being sealingly attached to the roof 20 end-to-end to form a first area 301, wherein the bottom of the reservoir tray 30 is the roof 20, and the first area 301 is formed in the roof 20 by the plurality of tray side walls 32 being sealingly attached to the roof 20 end-to-end. The water storage tray 30 is used as a part of a roof construction structure, and is reliable and durable. In another embodiment, as shown in fig. 10, the water storage tray 30 includes a tray bottom 31 and a tray side wall 32, the tray side wall 32 is perpendicular to the tray bottom 31 and extends along the edge of the tray bottom 31 for a circle, so as to form the water storage tray 30 with an open top, the water outlet hole 34 is disposed on the tray side wall 32 adjacent to the tray bottom 31, and preferably, the water storage tray 30 includes a plurality of water outlet holes 34, and the plurality of water outlet holes 34 are uniformly spaced from the bottom of the tray side wall 32. The water storage tray 30 of the embodiment can be adhered or welded to the roof 20 through the tray bottom 31, and can also be placed on the roof 20 through self weight and friction, so that the water storage tray has a more flexible layout mode and can be adjusted correspondingly according to different climatic environments. The water storage tray 30 of the above embodiment may be made of a non-metal material such as plastic and cement, or a metal material such as aluminum and stainless steel.

As shown in fig. 9, the height of the tray side walls 32 is preferably lower than the height of the edge 25 of the roof 20 for the same or similar purpose as the roofing structure for rainwater flow restriction using the restrictor plates 21, so that rainwater accumulated at a height exceeding the tray side walls 32 is still confined to the roof of the building and rapidly flows to the second area 302 directly communicating with the rainwater hopper 14.

In the case of a reservoir tray 30 comprising a tray bottom 31 and tray side walls 32, the reservoir tray 30 may be spaced apart from the roof 20 or may be closely spaced to the roof 20. In order to avoid no space for rain water to flow between adjacent water storage trays 30 when the water storage trays 30 are closely spaced, it is therefore preferred that the top of the tray side walls 32 are provided with a flange 33 extending outwardly of the water storage trays 30 as shown in figures 10 and 11.

According to the roof structure for limiting rainwater in the above embodiment, since the opening above the water storage tray 30 is large, in order to prevent foreign matters from entering and affecting the performance of the water storage tray 30, as shown in fig. 12, the water storage tray 30 preferably comprises a net cover 35, and the net cover 35 can be fixed at the opening above the water storage tray 30, or the net cover 35 is preferably detachably arranged at the opening above the water storage tray 30 to prevent sundries from entering the inner side of the water storage tray 30. Wherein the open mesh cover 35 detachably arranged above the water storage tray 30 is convenient for replacement and maintenance. The net cover 35 and the water storage tray 30 are preferably provided with a connecting structure which is convenient to be manually assembled and disassembled, such as a threaded structure and a buckling structure.

According to the roof structure for limiting rainwater in the preferred embodiment, the roof 20 is divided into the first area 301 formed by the water storage disc 30 and the second area 302 located outside the water storage disc 30 and directly communicated with the rainwater hopper 14 through the water storage disc 30, when the rainwater storage height of the roof does not exceed the side wall 32 of the tray of the water storage disc 30, rainwater in the second area 302 directly communicated with the rainwater hopper 14 can be quickly discharged, and the rainwater in the first area 301 needs to flow to the second area 302 through the water outlet holes 34 with limited apertures to be discharged by the rainwater hopper 14, so that the rainwater discharge speed of the roof can be controlled according to the flux of the water outlet holes 34 of the water storage disc 30.

Based on the above roofing structure with a water storage tray 30 for limiting rainwater, the same as the roofing structure with a current-limiting plate 21 for limiting rainwater can be combined with the rainwater hopper device described above, so as to provide a roofing drainage structure of another embodiment, which includes: the roof structure for limiting the flow of rainwater is the roof structure for limiting the flow of rainwater according to the embodiment; a flow restricting hood fixedly secured to the storm drain 14 in the roofing structure, the flow restricting hood comprising a flow restricting hood according to any of the embodiments hereinbefore described.

The preferred embodiments of the present application have been described in detail above, but the present application is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present application within the technical idea of the present application, and these simple modifications all belong to the protection scope of the present application.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in the present application.

In addition, any combination of the various embodiments of the present application is also possible, and the same should be considered as disclosed in the present application as long as it does not depart from the idea of the present application.

Claims (10)

1. A roofing structure for limiting the flow of rainwater, characterized in that, this roofing structure includes:

a roof (20), the roof (20) being a roof of a building;

a rainwater hopper (14), wherein the rainwater hopper (14) is arranged on the roof (20) and communicated with a drainage pipeline of the building;

a plurality of water storage trays (30), the plurality of water storage trays (30) being arranged on the roof (20) to divide the roof (20) into a first region (301) formed by the water storage trays (30) and a second region (302) located outside the water storage trays (30) and in direct communication with the storm drain (14),

wherein, the lateral wall of the water storage tray (30) is provided with a water outlet hole (34) which is communicated with the first area and the second area.

2. Roof structure for limiting the flow of rainwater according to claim 1, characterized in that said water outlet hole (34) is a circular hole, an elliptical hole, a rectangular hole or a square hole.

3. A roofing structure for limiting flow of stormwater according to claim 1, characterised in that the reservoir (30) includes a plurality of tray side walls (32), the tray side walls (32) being sealingly arranged end to the roof (20) to form the first zone (301).

4. A roofing structure for limiting flow of stormwater according to claim 1, characterised in that the reservoir tray (30) comprises a tray bottom (31) and tray side walls (32), the tray side walls (32) extending all the way around perpendicular to the tray bottom (31) and along the edges of the tray bottom (31) so as to form an open-topped reservoir tray (30), the outlet apertures (34) being provided in the tray side walls (32) adjacent to the tray bottom (31).

5. Roofing structure for rain water current limitation according to claim 3 or 4, characterized in that the height of the tray side walls (32) is lower than the height of the edges (25) of the roof (20).

6. Roofing structure for limiting the flow of rainwater according to claim 5, characterized in that the top end of the tray side walls (32) is provided with a flange (33) extending towards the outside of the reservoir (30).

7. Roofing structure for limiting the flow of rainwater according to claim 5, characterized in that a tray bottom (31) is glued to said roofing (20).

8. A roofing structure for limiting flow of stormwater according to claim 5, characterised in that the reservoir (30) includes a plurality of outlet apertures (34), the plurality of outlet apertures (34) opening onto the bottom of the tray side wall (32) at regular intervals.

9. A roofing structure for limiting flow of stormwater according to claim 5, characterised in that the reservoir tray (30) includes a mesh cover (35), the mesh cover (35) being removably located in an opening above the reservoir tray (30) to prevent debris from entering the inside of the reservoir tray (30).

10. Roofing drainage structures, its characterized in that, this roofing drainage structures includes:

a roofing structure for rainwater flow restriction according to any one of claims 1 to 9;

the flow-limiting cover is fixedly covered on a rainwater hopper (14) in the roof structure and comprises a hollow cover body (10) and at least one flow-limiting opening (12) arranged on the cover body (10).

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