Indoor sewer line shaft access door
By combining fixed-distance frames, limiting frames, and clip structures, the problem of gaps in tile decoration for indoor sewer pipe well inspection doors is solved, achieving seamless opening and aesthetically pleasing inspection door installation, and simplifying the installation process.
Patent Information
- Application Number
- CN202520032359.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-01-07
AI Technical Summary
The access doors of existing indoor sewer pipe shafts tend to leave large gaps when opened in tiled decorations, affecting the aesthetics. At the same time, exposed sewer pipes are noisy and need to be sealed, but the access doors still need to be left, resulting in inconsistent decoration.
It adopts a fixed-distance frame, a limiting frame and a clip structure. Through the cooperation of U-shaped grooves and semi-circular ribs, combined with the concave and convex surface structure and adhesive to fix the tiles, it can achieve seamless opening and use standardized profiles to embed the access port.
It enables seamless opening of the access door for tiled surfaces, enhancing aesthetics, and simplifies the installation process through standardized profiles.
Smart Images

Figure CN223893727U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an indoor sewer pipe well inspection door, belonging to the field of construction. Background Technology
[0002] Currently, indoor drainage pipes are installed in the bathroom or kitchen, protruding from the wall for easy maintenance.
[0003] However, exposed sewer pipes are noisy and cause many problems for residents. To reduce noise, pipe shafts are usually built to enclose the sewer pipes. However, inspection doors are still needed for later maintenance and inspection. Door-like structures can clash with the surrounding tiles in the kitchen or bathroom, resulting in an unsightly appearance. How can we install inspection doors that are concealed by tiles to improve the aesthetics of the renovation?
[0004] When fixing tiles to access doors, the presence of gaps needs to be considered. Conventional access doors require a relatively large gap when opening and closing, which is difficult to solve. Summary of the Invention
[0005] This invention provides an access door for indoor sewer pipe wells, solving the problem of opening the wells when they are decorated with ceramic tiles.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] This utility model includes an indoor sewer pipe well inspection door, comprising a fixed-distance frame, a limiting frame, and a clip fixed behind the tiles;
[0008] The fixed-distance frame includes a rectangular reinforcing frame on the outer side, a semi-circular rib on the inner side, and a horizontal groove at the rear. The limiting frame is Z-shaped, with its lower side embedded in the horizontal groove at the end of the fixed-distance frame. The two sets of fixed-distance frames and the two sets of limiting frames form a rectangular frame structure. The card is provided with a U-shaped groove, which is embedded in the semi-circular rib.
[0009] According to the aforementioned indoor sewer pipe well inspection door, the fixed-distance frame is provided with a connecting plate connecting the rear side of the reinforcing frame, the rear side of the semi-circular rib, and the upper side of the horizontal groove. The horizontal groove is a groove that opens towards the middle of the inspection door, and one side of the limiting frame is embedded into the horizontal groove from the end of the fixed-distance frame.
[0010] According to the aforementioned indoor sewer manhole inspection door, the lower side surface of the limiting frame is provided with a protruding limiting rib. The limiting rib and the lower side of the limiting frame are simultaneously embedded in the horizontal groove, and the combined height of the limiting rib and the lower side of the limiting frame is interference-fitted with the groove width of the horizontal groove.
[0011] According to the aforementioned indoor sewer manhole inspection door, the semi-circular rib has a semi-circular top and a smoothly connected rectangular bottom, with the bottom of the rectangular shape being integral with the connecting plate.
[0012] According to the aforementioned indoor sewer manhole inspection door, the fastener also includes an adhesive surface. The vertical portion of the U-shaped groove in the fastener is perpendicular to the adhesive surface. The adhesive surface has a concave-convex structure, and the concave-convex structure is coated with adhesive to fix the back of the tile.
[0013] According to the aforementioned indoor sewer manhole inspection door, the concave-convex surface structure is a vertical side with the top of the side protruding to both sides.
[0014] The advantages of this utility model are:
[0015] The access door with tile decoration is not connected by hinges, so it will not interfere when opened and will not leave large gaps;
[0016] This device is made of standardized profiles, making it easy to process and manufacture. It can be embedded in the access port during installation, making installation simpler. Attached Figure Description
[0017] Figure 1 This is a top view of the present invention.
[0018] Figure 2 This is a cross-sectional view of the present invention.
[0019] Figure 3 This is a structural diagram of the card component of this utility model.
[0020] Figure 4 This is a structural diagram of the limiting frame of this utility model.
[0021] Figure 5 This is a structural diagram of the fixed-distance frame of this utility model.
[0022] Figure label:
[0023] 1. Fixed-distance frame, 11. Reinforcing frame, 12. Semi-circular rib, 13. Horizontal groove, 14. Connecting plate, 2. Limiting frame, 21. Limiting rib, 3. Clip, 31. Adhesive surface, 32. Concave-convex surface structure, 33. U-shaped groove, 4. Tile, 5. Adhesive. Detailed Implementation
[0024] The specific structure of this utility model will be further described below:
[0025] This utility model includes an indoor sewer pipe well inspection door, comprising a fixed-distance frame 1, a limiting frame 2, and a clip 3 fixed behind the tile 4.
[0026] Specific examples Figure 1 As shown, the two sides are fixed-distance borders, and the top and bottom are limiting borders.
[0027] like Figure 2 The screenshot structure shown includes a fixed-distance frame 1 consisting of a rectangular reinforcing frame 11 on the outer side, a semi-circular reinforcing rib 12 on the inner side, and a horizontal groove 13 at the rear. The limiting frame 2 is Z-shaped, with its lower side embedded in the horizontal groove 13 at the end of the fixed-distance frame 1. The structure consists of two sets of fixed-distance frames 1 and two sets of limiting frames 2, forming a rectangular frame structure.
[0028] In this device, the top of the cross-section of the semi-circular rib 12 is semi-circular, and the bottom is a smoothly connected rectangular shape. The bottom of the rectangular shape is integral with the connecting plate 14.
[0029] The device's clip 3 has a U-shaped groove, which is embedded in the semi-circular rib 12. The U-shaped groove is interference-fitted with the semi-circular rib 12. During installation, the clip is fixed to the rear of the tile, and the U-shaped groove is embedded in the semi-circular rib 12 to fix the tile on the fixed-distance frame.
[0030] The fixed-distance frame 1 of this device is provided with a connecting plate 14 connecting the rear side of the reinforcing frame 11, the rear side of the semi-circular rib 12 and the upper side of the horizontal groove 13. The horizontal groove 13 is a groove that opens towards the middle of the inspection door. One side of the limiting frame 2 is embedded into the horizontal groove 13 from the end of the fixed-distance frame 1.
[0031] The lower side surface of the limiting frame 2 is provided with a protruding limiting rib 21. The limiting rib 21 and the lower side of the limiting frame 2 are simultaneously embedded in the horizontal groove 13. The combined height of the limiting rib 21 and the lower side of the limiting frame 2 is interference-fitted with the groove width of the horizontal groove 13.
[0032] In this device, the clip 3 also has an adhesive surface 31. The vertical portion of the U-shaped groove in the clip 3 is perpendicular to the adhesive surface 31. The adhesive surface 31 has a concave-convex structure 32, which is coated with adhesive to fix the back of the tile 4. The adhesive surface has a large bonding area with the tile, resulting in a stronger bond after adhesive adhesion.
[0033] The specific concave-convex structure 32 has vertical edges, with the top of the edges protruding to both sides. During bonding, the adhesive enters between the edges and extends behind the protrusions. Once the adhesive has solidified, it forms a concave-convex interlocking structure with the clip. As long as the adhesive does not break or weather, it can effectively secure the clip and the back of the tile.
[0034] The access door with tile decoration is not connected by hinges, so it will not interfere when opened and will not leave large gaps;
[0035] This device is made of standardized profiles, making it suitable for processing and manufacturing. It can be embedded into the access port during installation.
Claims
1. An inspection door for an indoor sewer pipe well, characterized in that, Includes a fixed-distance frame (1), a limiting frame (2), and a clip (3) fixed behind the tile (4); The fixed-distance frame (1) includes a rectangular reinforcing frame (11) on the outer side, a semi-circular rib (12) on the inner side, and a horizontal groove (13) at the rear. The limiting frame (2) is Z-shaped and its lower side is embedded in the horizontal groove (13) at the end of the fixed-distance frame (1). The two sets of fixed-distance frames (1) and the two sets of limiting frames (2) are rectangular frame structures. The clip (3) is provided with a U-shaped groove, which is embedded in the semi-circular rib (12).
2. The access door for indoor sewer pipe wells according to claim 1, characterized in that, The fixed-distance frame (1) is provided with a connecting plate (14) connecting the rear side of the reinforcing frame (11), the rear side of the semi-circular rib (12) and the upper side of the horizontal groove (13). The horizontal groove (13) is a groove that opens towards the middle of the inspection door. One side of the limiting frame (2) is embedded into the horizontal groove (13) from the end of the fixed-distance frame (1).
3. The access door for indoor drainage pipe wells according to claim 2, characterized in that, The lower side surface of the limiting frame (2) is provided with a protruding limiting rib (21). The limiting rib (21) and the lower side of the limiting frame (2) are simultaneously embedded in the horizontal groove (13). The combined height of the limiting rib (21) and the lower side of the limiting frame (2) is interference-fitted with the groove width of the horizontal groove (13).
4. The access door for indoor sewer pipe wells according to claim 2, characterized in that, The cross-section of the added semi-circular rib (12) is a semi-circle at the top and a smoothly connected rectangular shape at the bottom, with the bottom of the rectangular shape being integral with the connecting plate (14).
5. The access door for indoor sewer pipe wells according to claim 2, characterized in that, The clip (3) also includes an adhesive surface (31), the vertical part of the U-shaped groove in the clip (3) is perpendicular to the adhesive surface (31), the adhesive surface (31) is provided with a concave-convex structure (32), the concave-convex structure (32) is coated with adhesive to fix the back of the tile (4).
6. The access door for indoor drainage pipe wells according to claim 5, characterized in that, The concave-convex surface structure (32) is a vertical side with the top of the side protruding to both sides.