A roof gutter filter structure

The double-layer filter frame structure and opening design expand the filtration range, solving the problem of easy clogging of the filter cover and improving the roof drainage capacity and the durability of the waterproof system.

CN224338531UActive Publication Date: 2026-06-09SHANGHAI CHINA CONSTR ARCHITECTURAL DESIGN INST CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI CHINA CONSTR ARCHITECTURAL DESIGN INST CO LTD
Filing Date
2025-06-20
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

The existing roof drain filter structure has a small filtration range and is prone to clogging, resulting in poor roof drainage capacity. Long-term immersion in rainwater erodes the waterproof layer and affects the building quality.

Method used

It adopts a double-layer filter frame structure. The first and second filter frames are equipped with filter holes of different sizes. Combined with the opening design, the water filtration range is expanded. It is also made of steel bars into a 6-8mm circular filter cover, which blocks fallen leaves and dirt in layers and increases the area of ​​the drain outlet.

Benefits of technology

Improve roof drainage capacity, reduce the probability of blockage, enhance the durability of the waterproofing system, and ensure the waterproof and thermal insulation performance of the roof.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224338531U_ABST
    Figure CN224338531U_ABST
Patent Text Reader

Abstract

This utility model provides a roof drain filter structure, relating to the field of building roof waterproofing and drainage technology. It includes a roof body with an opening at its top. A drain pipe is installed within the opening, and a connecting plate is fixed to the outer wall of the top of the drain pipe. The connecting plate is installed with the roof body. A first filter frame is located outside the drain pipe within the opening, and the first filter frame has multiple first filter holes. The first and second filter frames are made of steel reinforcement and are processed into circular filter covers with filter holes of 6-8mm, depending on the local leaf type. These are then placed over the existing drain pipe. Because the two filter frames have different sizes of first and second filter holes, they can simultaneously block fallen leaves and dirt in layers, avoiding the clogging issues common with traditional filter covers where all leaves and dirt are blocked by a single layer. This design significantly enhances practicality.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the field of building roof waterproofing and drainage technology, and in particular to a roof drain filter structure. Background Technology

[0002] Currently, the drainage outlets of flat roof buildings are small in size. If fallen leaves or debris are not cleaned in time, they will block the drainage outlets, causing the roof to be soaked in rainwater for a long time. In severe cases, this will erode the waterproof layer, damage the waterproof layer, affect the waterproof and thermal insulation performance of the entire roof, and reduce the quality of the building.

[0003] Currently, one type of roof drain filtration structure in existing technology involves directly installing a filter cover for filtration. However, traditional filter covers have a small filtration range and a high probability of clogging the drain outlet, resulting in poor roof drainage capacity. This leads to the roof being soaked in rainwater for a long time, which can severely erode the waterproof layer, damage the roof waterproof layer, affect the overall waterproof and thermal insulation performance of the roof, and reduce the building quality. Utility Model Content

[0004] The purpose of this utility model is to solve the problems in the existing technology where filter covers are directly installed and removed. Traditional filter covers have a small filtration range and are prone to clogging the drain outlet, resulting in poor roof drainage capacity. This leads to long-term rainwater immersion on the roof, which can severely erode the waterproof layer, damage the roof waterproof layer, affect the overall waterproof and thermal insulation performance of the roof, and reduce the building quality. Therefore, this utility model proposes a roof drain outlet filtration structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a roof drain filter structure, comprising a roof body, an opening at the top of the roof body, a drain pipe inside the opening, a connecting plate fixed to the outer wall of the top of the drain pipe, the connecting plate being installed with the roof body, a first filter frame located outside the drain pipe inside the opening, the first filter frame having multiple first filter holes, and a second filter frame located outside the first filter frame inside the opening, the second filter frame having multiple second filter holes.

[0006] Preferably, the bottom ends of the first filter frame and the second filter frame are both fixed with fixing sleeves, and the bottom ends of the two fixing sleeves are both fixed with adhesive strips. The fixing sleeves are attached and fixed to the roof body by the adhesive strips.

[0007] Preferably, the inner bottom wall of the opening is provided with a mating groove that matches the two fixed sleeves.

[0008] Preferably, the second filter pore is larger than the first filter pore.

[0009] Preferably, the roof body has a connecting hole that matches the downpipe, and the inner bottom wall of the opening has a groove that matches the connecting plate located outside the connecting hole.

[0010] Preferably, the connecting plate is fixed to the roof structure by bolts.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] In this invention, the first and second filter frames are made of steel reinforcement. Based on the local leaf fall type, they are machined into circular filter covers with filter holes of 6-8mm in size, which are then placed over the existing drainpipe. Because of the two filter frames, the first and second filter holes within each frame are of different sizes, allowing for layered blocking of fallen leaves and dirt. This avoids the problem of traditional filter covers blocking all leaves and dirt in a single layer, which easily leads to clogging. This design enhances practicality. Furthermore, the device features openings, and these openings are designed according to the... The second filter frame has a cavity 30mm lower than the horizontal plane of the roof structure on the outside of the downpipe. This effectively increases the downpipe's outlet area and allows the second filter frame to have a larger contact area with the falling water, thus expanding the filtration range, improving roof drainage capacity, and enhancing the durability of the roof waterproofing system. This device provides a practical, economical, and easy-to-manufacture downpipe filter cover. After installation, it increases the filtration range, reduces the probability of clogging the downpipe, improves roof drainage capacity, and enhances the durability of the roof waterproofing system, making it more practical. Attached Figure Description

[0013] Figure 1 A perspective view of a roof drain filter structure is provided for this utility model;

[0014] Figure 2 A cross-sectional view of a roof drain filter structure is provided for this utility model;

[0015] Figure 3 This utility model provides a schematic diagram of the internal structure of the roof main body for a roof drain filter structure;

[0016] Figure 4 This utility model presents a schematic diagram of the internal structure of the second filter frame of a roof drain filter structure.

[0017] Legend: 1. Roof main body; 2. Opening; 3. Downpipe; 4. Connecting hole; 5. Connecting plate; 6. Bolt; 7. Groove; 8. Connecting groove; 9. Fixing sleeve; 10. Adhesive strip; 11. First filter frame; 12. First filter hole; 13. Second filter frame; 14. Second filter hole. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Example 1, as Figure 1-4 As shown, this utility model provides a roof drain filter structure, including a roof body 1, an opening 2 at the top of the roof body 1, a drain pipe 3 inside the opening 2, a connecting plate 5 fixed to the outer wall of the top of the drain pipe 3, the connecting plate 5 being installed with the roof body 1, a first filter frame 11 located outside the drain pipe 3 inside the opening 2, a plurality of first filter holes 12 inside the first filter frame 11, and a second filter frame 13 located outside the first filter frame 11 inside the opening 2, a plurality of second filter holes 14 inside the second filter frame 13.

[0021] The overall effect of Embodiment 1 is that, through the installation of the downpipe 3, water on the roof body 1 can be guided and discharged. Through the installation of the connecting plate 5, the downpipe 3 can be installed and dismantled. The first filter frame 11 and the second filter frame 13 are made of steel bars. According to the local type of fallen leaves, they are processed into circular filter covers with a filter hole size of 6-8mm and covered on the original downpipe 3. Through the installation of the two filter frames, the first filter hole 12 and the second filter hole 14 in the two filter frames are different in size, which can simultaneously block fallen leaves and dirt in layers. This avoids the situation of traditional filter covers, where all fallen leaves and dirt are blocked by a single layer of filter cover, which is extremely easy to cause blockage. This makes the system more practical.

[0022] Example 2, as Figure 1-4 As shown, the bottom ends of the first filter frame 11 and the second filter frame 13 are both fixed with fixing sleeves 9, and the bottom ends of the two fixing sleeves 9 are both fixed with adhesive strips 10. The fixing sleeves 9 are attached to the roof body 1 through the adhesive strips 10. The inner bottom wall of the opening 2 is provided with a mating groove 8 that matches the two fixing sleeves 9. The second filter hole 14 is larger than the first filter hole 12. The roof body 1 is provided with a connecting hole 4 that matches the downpipe 3. The inner bottom wall of the opening 2 is provided with a groove 7 that matches the mating plate 5 outside the connecting hole 4. The mating plate 5 is fixed to the roof body 1 by bolts 6.

[0023] The overall effect of embodiment 2 is that, through the setting of opening 2, and the opening 2 having a cavity 30mm lower than the horizontal plane of the roof body 1 on the outside of the downpipe 3 according to the size of the second filter frame 13, the downpipe 3's drainage outlet area is indirectly increased, and the second filter frame 13 can contact the downpipe with a larger area, increasing the filtration range, improving the roof drainage capacity, and enhancing the durability of the roof waterproofing system. This device provides a practical, economical, and easy-to-process downpipe filter cover. After installation, it increases the filtration range, reduces the probability of clogging the downpipe, improves the roof drainage capacity, and enhances the durability of the roof waterproofing system, making it more practical. Through the setting of the adhesive strip 10, the first filter frame 11 and the second filter frame 13 can be attached and fixed.

[0024] Working principle: When in use, the first filter frame 11 and the second filter frame 13 are made of steel bars. Depending on the local leaf type, they are processed into circular filter covers with filter holes of 6-8mm. These are then placed over the existing drain pipe 3. Because of the two filter frames, the first filter holes 12 and the second filter holes 14 within each frame are of different sizes. This allows for layered blocking of fallen leaves and dirt, avoiding the clogging issues common with traditional filter covers where all leaves and dirt are blocked by a single layer. This design enhances practicality. Furthermore, the device incorporates an opening 2... 2. A cavity 30mm lower than the horizontal plane of the roof body 1 is opened on the outside of the downpipe 3 according to the size of the second filter frame 13. This indirectly increases the downpipe area of ​​the traditional downpipe 3, and the second filter frame 13 can contact the downpipe with a larger area, thereby increasing the filtration range, improving the roof drainage capacity, and enhancing the durability of the roof waterproofing system. This device provides a practical, economical, and easy-to-manufacture downpipe filter cover. After installation, it increases the filtration range, reduces the probability of clogging the downpipe, improves the roof drainage capacity, and enhances the durability of the roof waterproofing system, making it more practical.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A roof drain filter structure, comprising a roof body (1), characterized in that: The roof body (1) has an opening (2) at the top, and a downpipe (3) is provided in the opening (2). A connecting plate (5) is fixed to the outer wall of the top of the downpipe (3). The connecting plate (5) is installed with the roof body (1). A first filter frame (11) is provided in the opening (2) outside the downpipe (3). A plurality of first filter holes (12) are provided in the first filter frame (11). A second filter frame (13) is provided in the opening (2) outside the first filter frame (11). A plurality of second filter holes (14) are provided in the second filter frame (13).

2. The roof drain filter structure according to claim 1, characterized in that: The bottom ends of the first filter frame (11) and the second filter frame (13) are both fixed with a fixing sleeve (9), and the bottom ends of the two fixing sleeves (9) are both fixed with a rubber strip (10). The fixing sleeves (9) are attached to the roof body (1) by the rubber strip (10).

3. The roof drain filter structure according to claim 2, characterized in that: The inner bottom wall of the opening (2) is provided with a mating groove (8) that matches the two fixed sleeves (9).

4. The roof drain filter structure according to claim 1, characterized in that: The second filter hole (14) is larger than the first filter hole (12).

5. A roof drain filter structure according to claim 1, characterized in that: The roof body (1) has a connecting hole (4) that matches the downpipe (3), and the inner bottom wall of the opening (2) has a groove (7) that matches the connecting plate (5) located outside the connecting hole (4).

6. The roof drain filter structure according to claim 1, characterized in that: The docking plate (5) is fixed to the roof body (1) by bolts (6).