Water leakage prevention flange structure for closestool
By designing a leak-proof flange structure and using a combination of fastening bolts and waterproof adhesive, the sealing problem at the connection between the toilet and the drain outlet is solved, achieving a more efficient sealing effect and preventing sewage leakage and odor emission.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO SHENGHAI STONE NEW MATERIAL CO LTD
- Filing Date
- 2025-05-13
- Publication Date
- 2026-04-14
AI Technical Summary
The existing connection between the toilet and the pre-reserved sewage outlet in the bathroom has poor sealing, which can easily lead to the flange ring coming off or shifting, resulting in sewage leakage and odor.
A leak-proof structure including a connecting flange and a toilet flange was designed. The connecting flange is fixed to the waterproof base with fastening bolts and sealed with waterproof adhesive. The toilet flange is bonded to the groove of the connecting flange with an adhesive ring to achieve a secondary seal.
It improves the sealing effect between the toilet and the drain pipe, preventing sewage leakage and odor emission, and enhances the stability and sealing of the connection.
Smart Images

Figure CN224119670U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of prefabricated building technology, and in particular to a leak-proof flange structure for toilets. Background Technology
[0002] Prefabricated bathrooms consist of a basic frame made up of a waterproof chassis, wall panels, and floor slabs. The toilet and various functional sanitary wares are installed on the waterproof chassis to form an independent sanitary unit, which has many advantages such as standardized production and rapid installation.
[0003] The current method of connecting toilets installed on waterproof bases to the pre-installed drain outlet in the bathroom mostly involves pre-drilling a round hole in the integrated bathroom base, aligning it with the pre-installed drain pipe outlet on the bathroom floor, and then installing the toilet. The toilet's drain outlet and the bathroom drain outlet are sealed together using a toilet flange. Traditional toilet flanges use adhesive on the top surface to bond to the bottom of the toilet, resulting in a small contact area and unreliable contact. Over time, the flange ring is prone to detaching from the bottom of the toilet, and the lack of adhesion between the flange ring and the drain outlet makes it easy for the flange ring to shift, leading to sewage leakage, odor emission, increased bacterial growth around the toilet, and significant pollution to the home environment. Utility Model Content
[0004] In order to overcome the above-mentioned defects in the prior art, this utility model provides a leak-proof flange structure for toilets.
[0005] The technical solution adopted by this utility model to solve its technical problem is: a leak-proof flange structure for a toilet, including a floor slab, a waterproof base plate installed on the floor slab, a drain pipe vertically embedded in the floor slab, a circular hole opened above the drain pipe on the waterproof base plate, a connecting flange installed in the circular hole, the connecting flange including a flange plate, a plurality of bolt holes arranged in a circumferential array on the top wall of the flange plate, fastening bolts installed in the bolt holes, the fastening bolts being used to fix the connecting flange to the waterproof base plate, a connecting pipe matching the drain pipe provided at the bottom center of the flange plate, and a groove opened at the top center of the flange plate, a toilet flange installed in the groove.
[0006] Furthermore, an annular groove is provided at the bottom edge of the flange, and an injection hole is provided on the top surface of the flange. The injection hole is connected to the annular groove and has a funnel-shaped structure with a large opening at the top.
[0007] Furthermore, the bolt hole is a countersunk structure, and a sealing plug is fitted at the top of the bolt hole.
[0008] Furthermore, the toilet flange includes a rubber ring, and a guide pipe is fixedly installed at the bottom end of the rubber ring.
[0009] The beneficial effects of this utility model are that the design scheme connects the toilet bowl to the drain pipe through a connecting pipe, and the connecting flange is fixed to the waterproof base with fastening bolts. After the toilet flange is glued to the toilet's drain outlet, the toilet flange is aligned with the groove on the top of the connecting flange, so that the toilet flange is glued and fixed in the groove to prevent the toilet flange from shifting. At the same time, a secondary seal is performed between the toilet's drain outlet and the drain pipe, which helps to improve the sealing effect and prevent sewage leakage and odor emission. Attached Figure Description
[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0011] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;
[0012] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;
[0013] Figure 3 This is an exploded view of the present invention;
[0014] Figure 4 This is a structural diagram of the present invention in its installed state;
[0015] Figure 5 This is a cross-sectional structural diagram of the present invention in its installed state;
[0016] Figure 6 for Figure 5 A magnified view of a portion of region A in the middle.
[0017] In the diagram: 1. Floor slab, 2. Waterproof base, 21. Round hole, 3. Drain pipe, 4. Connecting flange, 41. Flange, 42. Bolt hole, 43. Groove, 44. Annular groove, 45. Injection hole, 46. Connecting pipe, 5. Fastening bolt, 6. Sealing plug, 7. Toilet flange, 71. Rubber ring, 72. Drainage pipe. Detailed Implementation
[0018] To more clearly illustrate the technical solution of this utility model, the following description is made in conjunction with the accompanying drawings. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings and embodiments without creative effort, and all of them fall within the protection scope of this utility model.
[0019] according to Figure 1-6As shown, a leak-proof flange structure for a toilet includes a floor slab 1, a waterproof base plate 2 installed on the floor slab 1, a drain pipe 3 vertically embedded in the floor slab 1, a circular hole 21 above the drain pipe 3 on the waterproof base plate 2, a connecting flange 4 installed in the circular hole 21, the connecting flange 4 including a flange 41, a plurality of bolt holes 42 arranged circumferentially on the top wall of the flange 41, fastening bolts 5 installed in the bolt holes 42, the fastening bolts 5 used to fix the connecting flange 4 on the waterproof base plate 2, a connecting pipe 46 matching the drain pipe 3 is provided at the bottom center of the flange 41, and a groove 43 is provided at the top center of the flange 41, a toilet flange 7 installed in the groove 43.
[0020] In this embodiment, an annular groove 44 is provided at the bottom edge of the flange 41, and an injection hole 45 is provided on the top surface of the flange 41. The injection hole 45 is connected to the annular groove 44. The injection hole 45 is a funnel-shaped structure with a large opening at the top. After the connecting flange 4 is fixed to the waterproof base plate with fastening bolts 5, the construction personnel inject waterproof glue into the annular groove 44 through the injection hole 45. After the waterproof glue solidifies, the connecting flange 4 is further fixed with the waterproof glue. At the same time, the outer periphery of the connecting flange 4 is sealed with the waterproof glue to prevent water from seeping into the bottom of the waterproof base plate 2.
[0021] In this embodiment, the bolt hole 42 is a countersunk structure, and a sealing plug 6 is installed at the top of the bolt hole 42. The sealing plug 6 is made of rubber. By sealing the bolt hole 42 with the sealing plug 6, external water is prevented from entering the bolt hole 42 and causing the fastening bolt 5 to rust.
[0022] In this embodiment, the toilet flange 7 includes a rubber ring 71, and a guide pipe 72 is fixedly installed at the bottom end of the rubber ring 71. During daily storage, the rubber ring 71 is covered with a liner. When in use, the liner is peeled off, and the toilet flange 7 is bonded to the groove 43 at the top of the connecting flange 4 through the rubber ring 71. The toilet flange 7 seals the drain outlet of the toilet and the connecting flange 4, and the sewage in the toilet is guided into the drain pipe 3 through the guide pipe 72.
[0023] In use, this utility model first aligns the connecting pipe 46 at the bottom of the connecting flange 4 with the drain pipe 3 on the floor slab 1 and inserts it into the drain pipe 3. Then, the fastening bolts 5 are installed into the bolt holes 42 in sequence, and the connecting flange 4 is fixed to the waterproof base plate 2 by the fastening bolts 5. Then, the sealing plug 6 is installed into the bolt holes 42. Then, the waterproof adhesive is injected into the annular groove 44 through the injection hole 45. After the waterproof adhesive solidifies, the connecting flange 4 is further fixed by the waterproof adhesive. Then, the lining paper around the rubber ring 71 is peeled off, and then the rubber ring 71 of the toilet flange 7 is glued to the sewage outlet of the toilet. When fixing the toilet, the toilet flange 7 is aligned with the groove 43 at the top of the connecting flange 4, so that the toilet flange 7 is glued and fixed in the groove 43 to prevent the toilet flange 7 from shifting. At the same time, a secondary seal is performed between the sewage outlet of the toilet and the drain pipe 3, which helps to improve the sealing effect and prevent sewage leakage and odor emission.
[0024] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this utility model.
Claims
1. A leak-proof flange structure for a toilet, comprising a floor slab (1), a waterproof base plate (2) fitted on the floor slab (1), a drain pipe (3) vertically embedded in the floor slab (1), and a circular hole (21) provided on the waterproof base plate (2) above the drain pipe (3), characterized in that: A connecting flange (4) is fitted inside the circular hole (21). The connecting flange (4) includes a flange plate (41). Several sets of bolt holes (42) are arranged in a circumferential array on the top wall of the flange plate (41). Fastening bolts (5) are fitted inside the bolt holes (42). The fastening bolts (5) are used to fix the connecting flange (4) on the waterproof base plate (2). A connecting pipe (46) matching the drain pipe (3) is provided at the bottom center of the flange plate (41). A groove (43) is opened at the top center of the flange plate (41). A toilet flange (7) is fitted inside the groove (43).
2. The anti-leakage flange structure for a toilet according to claim 1, characterized in that, The flange (41) has an annular groove (44) at the bottom near the edge, and an injection hole (45) is provided on the top surface of the flange (41). The injection hole (45) is connected to the annular groove (44), and the injection hole (45) is a funnel-shaped structure with a large opening at the top.
3. The anti-leakage flange structure for a toilet according to claim 1, characterized in that, The bolt hole (42) is a countersunk structure, and a sealing plug (6) is fitted on the top of the bolt hole (42).
4. The anti-leakage flange structure for a toilet according to claim 1, characterized in that, The toilet flange (7) includes a rubber ring (71), and a guide pipe (72) is fixedly installed at the bottom end of the rubber ring (71).