Roof rainwater outlet protection device
By installing a hollow shell protective device inside the drainage ditch, the mesh structure intercepts debris, solving the problem of drainage outlet blockage and ensuring timely drainage and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA TOBACCO ANHUI IND CO LTD
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-08
AI Technical Summary
Existing roof rainwater drains are easily blocked by debris, resulting in poor drainage, especially on large roof areas where water can easily accumulate, posing a safety hazard.
Design a protective device consisting of a hollow shell made up of a top mesh panel, front and rear end mesh panels, a left side frame, and a bottom frame. Install it in a drainage ditch to intercept debris using the mesh structure. It can also be flipped over for easy cleaning.
It effectively prevents drainage outlet blockage, ensures smooth rainwater drainage, avoids safety hazards, meets drainage needs of different rainfall volumes, and facilitates the cleaning of internal impurities.
Smart Images

Figure CN224213655U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of drainage protection devices, specifically to a roof rainwater drainage outlet protection device. Background Technology
[0002] Rainwater from building roofs needs to be drained promptly. Natural drainage is typically used, with drainage channels installed at the junction of the roof and parapet wall. Drainage outlets are located on the lower end of these channels, and drain pipes connect to these outlets to drain the rainwater out of the roof. In existing technology, to prevent debris from clogging the drainage outlets during drainage, a mesh or grate-shaped protective device is usually installed at the outlet. However, debris accumulates near this protective device with the rainwater, and if left unattended for a long time, it can easily clog the outlets, causing poor drainage. If it rains continuously, especially on large roofs, the accumulated rainwater can create safety hazards. Utility Model Content
[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a roof rainwater drainage outlet protection device to enable timely drainage of roof rainwater and avoid blockage of the drainage outlet.
[0004] This utility model is achieved through the following technical solution:
[0005] A roof rainwater drainage outlet protection device is provided, wherein a drainage ditch extending obliquely in the front-to-back direction is provided at the junction of the roof and the parapet wall, and a drainage outlet is opened on the bottom wall of the lower end of the drainage ditch. The protection device includes a protective body, which is a hollow shell formed by a top mesh panel, two front and rear end mesh panels, a left side frame, and a bottom frame. The two front and rear end mesh panels are arranged opposite each other. The left side frame is a rectangular frame parallel to the parapet wall. The top mesh panel is a rectangular mesh panel with the left side higher than the right side. The bottom frame is an arc shape that matches the shape of the bottom wall of the drainage ditch. The protective body is placed in the drainage ditch through the bottom frame and is located above the drainage outlet.
[0006] As a preferred embodiment of the above-mentioned device, the edge of the end face mesh plate is formed by a top edge, a left side edge, and a bottom edge connected end to end. The top edge of the end face mesh plate is an inclined edge with the left side higher than the right side, the left side edge of the end face mesh plate is a vertical edge, and the bottom edge of the end face mesh plate is a downwardly convex arc edge. The front and rear edges of the top face mesh plate coincide with the top edges of the front and rear end face mesh plates, respectively. The front and rear edges of the left side facade frame coincide with the left sides of the front and rear end face mesh plates, respectively. The top edge of the left side facade frame coincides with the left side edge of the top face mesh plate. The bottom edge of the bottom frame is formed by the bottom edges of the front and rear end face mesh plates, the bottom edge of the left side facade frame, and the right side edge of the top face mesh plate.
[0007] As a preferred embodiment of the above-mentioned device, the front and rear ends of the top edge of the left facade frame extend outward to form two pivots, and two support seats are provided on the parapet wall. The protective body is rotatably mounted on the two support seats through the two pivots.
[0008] As a preferred embodiment of the above-mentioned device, the front and rear support seats are provided with two pairs of flanges, and the flanges are provided with fixing holes. The two rotating shafts of the protective body are respectively rotatably installed in the fixing holes of the two flanges.
[0009] As a preferred embodiment of the above-mentioned device, the support base is provided with a flexible fixing clip, which is wrapped around and fixed to the left side facade frame to achieve the fixation of the protective body.
[0010] As a preferred embodiment of the above-mentioned device, the top mesh plate and the front and rear end mesh plates are mesh plate structures, and the left side frame and the bottom frame are hollow frame structures.
[0011] As a preferred embodiment of the above-mentioned device, the protective body is made of stainless steel.
[0012] This invention has the following advantages over the prior art:
[0013] This utility model provides a roof rainwater drainage outlet protection device. The protective body consists of a top mesh panel, two front and rear end mesh panels, a left side frame, and a bottom frame, forming a hollow shell. This three-dimensional hollow structure effectively intercepts roof debris, preventing it from accumulating at the drainage outlet and causing blockages. Simultaneously, the front and rear end mesh panels and the top mesh panel meet drainage needs in both low and high rainfall scenarios, solving the safety hazard caused by excessive rainwater accumulation on the roof due to poor drainage. Furthermore, the protective body is rotatably mounted on two support bases via two pivots, allowing for convenient flipping and cleaning of the interior and drainage outlet. Attached Figure Description
[0014] Figure 1 This is a perspective view of the present invention.
[0015] Figure 2 This is a plan view of the end face mesh plate of this utility model.
[0016] Figure 3 This is a plan view of the left facade frame of this utility model.
[0017] Figure 4 This is a schematic diagram of the structure of the two support bases of this utility model.
[0018] The numbers in the diagram are: 1. Top surface mesh panel; 2. End surface mesh panel; 3. Left side facade frame; 4. Bottom surface frame; 5. Rotating shaft; 6. Support base; 7. Mounting hole; 8. Flanged edge; 9. Fixing hole; 10. Fixing clip. Detailed Implementation
[0019] The embodiments of this utility model are described in detail below. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments.
[0020] See Figures 1 to 4 This embodiment discloses a roof rainwater drainage outlet protection device. A drainage ditch extending obliquely in the front-to-back direction is provided at the junction of the roof and the parapet wall. The drainage ditch is a downwardly recessed arc-shaped groove. A drainage outlet is opened on the bottom wall of the lower end of the drainage ditch. The protection device includes a protection body. The protection body is a hollow shell formed by a top mesh plate 1, two front and rear end mesh plates 2, a left side frame 3, and a bottom frame 4. The two front and rear end mesh plates 2 are arranged opposite each other. The left side frame 3 is a rectangular frame parallel to the parapet wall. The top mesh plate 1 is a rectangular mesh plate with the left side higher than the right side. The bottom frame 4 is an arc shape that matches the shape of the bottom wall of the drainage ditch. The protection body is placed in the drainage ditch through the bottom frame 4 and is located above the drainage outlet.
[0021] The edge of the end face mesh panel 2 is formed by the top edge, left side edge and bottom edge connected from end to end. The top edge of the end face mesh panel 2 is an inclined edge with the left side higher than the right side. The left side edge of the end face mesh panel 2 is a vertical edge. The bottom edge of the end face mesh panel 2 is a downward convex arc edge. The front and rear edges of the top face mesh panel 1 coincide with the top edges of the front and rear end face mesh panels 2 respectively. The front and rear edges of the left side facade frame 3 coincide with the left side edges of the front and rear end face mesh panels 2 respectively. The top edge of the left side facade frame 3 coincides with the left side edge of the top face mesh panel 1. The bottom edges of the front and rear end face mesh panels 2, the bottom edge of the left side facade frame 3 and the right side edge of the top face mesh panel 1 together form the edge of the bottom frame 4.
[0022] The top mesh panel 1 and the two end mesh panels 2 are mesh-like structures, while the left side frame 3 and the bottom frame 4 are openwork frame structures. The protective body is made of stainless steel, specifically welded from stainless steel wire. When this protective body is installed on the drain outlet of the drainage ditch, if there is little rainwater on the roof, rainwater flows into the drain outlet through the drainage ditch and the end mesh panels 2 of the protective body, and then exits the roof through the drain pipe connected to the drain outlet. When there is a lot of rainwater on the roof, the rainwater can also flow into the drain outlet through the top mesh panel 1 and exit the roof. The two end mesh panels 2 and the top mesh panel 1 of the mesh-like structure can block debris on the roof, preventing debris from accumulating at the drain outlet and affecting drainage. Therefore, this protective device adopts a three-dimensional hollow structure, which can effectively intercept debris from accumulating at the drain outlet, preventing blockage and solving the problem of poor rainwater drainage. This avoids the problem of excessive rainwater accumulation on the roof, which could pose a safety hazard.
[0023] The front and rear ends of the top edge of the left facade frame 3 extend outwards to form two pivots 5. Two support seats 6 are provided on the parapet wall. Expansion screws are passed through the mounting holes 7 of the support seats 6 and tightened onto the parapet wall to secure the support seats 6 to the parapet wall. The protective body is rotatably mounted on the two support seats 6 via the two pivots 5. The two support seats 6 have two pairs of flanges 8, each with a fixing hole 9. The two pivots 5 of the protective body are rotatably mounted in the fixing holes 9 of the two flanges 8. The support seats 6 can be made of thin stainless steel sheet; a slit is made at the top of the stainless steel sheet, and the flange 8 is formed by folding it outwards. The support seats 6 have flexible fixing clips 10, which can be made of flexible iron wire. The fixing clips 10 are wrapped around and fixed to the left facade frame 3 to secure the protective body. When it is necessary to flip the protective body, the fixing clips 10 are first removed from the left facade frame 3, allowing the protective body to be freely flipped upwards.
[0024] When some debris in the rainwater passes through the end face mesh 2 or top mesh 1, it may remain inside the cavity of the protective body. If there is too much debris inside the protective body, it may cause blockage. Therefore, to facilitate quick cleaning of impurities inside the protective body, this embodiment designs the protective body as a flip-up structure. That is, the two rotating shafts 5 of the protective body are rotatably connected to two support seats 6, allowing the protective body to flip around the two rotating shafts 5. When the protective body flips upward along the rotating shafts 5, the user can clean the inside of the protective body and the exposed drain outlet.
[0025] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A roof rainwater drainage outlet protection device, wherein a drainage ditch extending obliquely in the front-to-back direction is provided at the junction of the roof and the parapet wall, and a drainage outlet is opened on the bottom wall of the lower end of the drainage ditch, characterized in that: The protective device includes a protective body, which is a hollow shell formed by a top mesh panel, two front and rear end mesh panels, a left side frame, and a bottom frame. The two front and rear end mesh panels are arranged opposite each other. The left side frame is a rectangular frame parallel to the parapet wall. The top mesh panel is a rectangular mesh panel that is higher on the left and lower on the right. The bottom frame is an arc shape that matches the shape of the bottom wall of the drainage ditch. The protective body is placed in the drainage ditch through the bottom frame and is located above the drain outlet.
2. The roof rainwater drainage outlet protection device as described in claim 1, characterized in that: The edge of the end face mesh panel is formed by the top edge, left side edge and bottom edge connected end to end. The top edge of the end face mesh panel is an inclined edge with the left side higher than the right side, the left side edge of the end face mesh panel is a vertical edge, and the bottom edge of the end face mesh panel is a downward convex arc edge. The front and rear edges of the top face mesh panel coincide with the top edges of the front and rear end face mesh panels respectively. The front and rear edges of the left side facade frame coincide with the left sides of the front and rear end face mesh panels respectively. The top edge of the left side facade frame coincides with the left side edge of the top face mesh panel. The bottom edges of the bottom face frame are formed by the bottom edges of the front and rear end face mesh panels, the bottom edge of the left side facade frame and the right side edge of the top face mesh panel.
3. The roof rainwater drainage outlet protection device as described in claim 2, characterized in that: The front and rear ends of the top edge of the left facade frame extend outward to form two pivots. Two support seats are provided on the parapet wall. The protective body is rotatably installed on the two support seats through the two pivots.
4. The roof rainwater drainage outlet protection device as described in claim 3, characterized in that: The front and rear support bases are provided with two pairs of flanges, and the flanges have fixing holes. The two rotating shafts of the protective body are respectively rotatably installed in the fixing holes of the two flanges.
5. A roof rainwater drainage outlet protection device as described in claim 4, characterized in that: The support base is equipped with a flexible fixing clip, which is wrapped around and fixed to the left facade frame to fix the protective body.
6. The roof rainwater drainage outlet protection device as described in claim 1, characterized in that: The top mesh panel and the front and rear end mesh panels are mesh panel structures, while the left side frame and bottom frame are openwork frame structures.
7. A roof rainwater drainage outlet protection device as described in claim 1, characterized in that: The protective body is made of stainless steel.