Floor drain and waterproof plate closing structure

By using a quick-drying thick self-leveling mortar layer and a waterproof backing board layer as the leveling layer, combined with waterproof adhesive to fix the floor drain, the problem of the bathroom floor being higher than the indoor floor was solved, achieving a fast and stable construction effect.

CN224591554UActive Publication Date: 2026-08-04BEIJING NAT STANDARD CONSTR TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
BEIJING NAT STANDARD CONSTR TECH CO LTD
Filing Date
2025-07-11
Publication Date
2026-08-04

AI Technical Summary

Technical Problem

The existing prefabricated bathroom floor construction has resulted in the bathroom floor being higher than the indoor floor, affecting both aesthetics and usability.

Method used

A fast-drying, thick self-leveling mortar layer and a waterproof backing board layer are used as the leveling layer. The floor drain is fixed with waterproof adhesive. A unique drainage pipe and floor drain structure is designed to ensure fast construction speed, high flatness, and an overall height not exceeding 55mm.

Benefits of technology

It achieves a fast construction and a stable and solid drain and waterproof board finishing structure, avoiding the bathroom floor from being higher than the indoor floor, thus improving construction efficiency and overall integrity.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a floor drain and waterproof board close -up structure, including floor and the drain pipe of going through floor drain, the top end installation of drain pipe, the outside of drain pipe on the floor is from below and above and is arranged interface agent layer, fast -drying thick type self -leveling mortar layer, JS waterproof layer, waterproof backing board layer, ceramic tile adhesive layer, anti -skid floor tile layer in proper order, interface agent layer is rolled and is coated on the floor, fast -drying thick type self -leveling mortar layer pours on interface agent layer, JS waterproof layer is brushed on fast -drying thick type self -leveling mortar layer, waterproof backing board layer is fixed on JS waterproof layer through the sticking of plum blossom -like distribution point bond strip, and ceramic tile adhesive layer is the most thin slope at floor drain position, and anti -skid floor tile layer is bonded on ceramic tile adhesive layer, and the top end of drain pipe is lower than the top end of waterproof backing board layer 5mm, avoids the ground of bathroom to be higher than the ground of room, and sets up waterproof glue and fixes floor drain firmly, forms stable firm structure.
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Description

Technical Field

[0001] This utility model belongs to the field of bathroom floor construction, and specifically relates to a drain and waterproof board finishing structure. Background Technology

[0002] In bathroom renovation, floor waterproofing is a crucial hidden project that directly affects whether there will be leaks later on.

[0003] To improve the efficiency of ground construction, prefabricated bathroom flooring is often used, such as the patent with announcement number CN103590590B, which uses supports to install prefabricated integrated bathroom floor modules.

[0004] The following disadvantages exist: the base of the integrated bathroom is generally thicker, and the leveling process often exceeds 75mm, while the traditional flooring method in the interior is about 65cm, which will cause the bathroom floor to be higher than the living room floor. Utility Model Content

[0005] This utility model provides a drain and waterproof board sealing structure to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a floor drain and waterproofing board termination structure, including a floor slab and a drain pipe penetrating the floor slab. A floor drain is installed at the top of the drain pipe. From bottom to top, the outer side of the drain pipe on the floor slab is arranged with an interface agent layer, a quick-drying thick self-leveling mortar layer, a JS waterproofing layer, a waterproofing backing board layer, a tile adhesive layer, and an anti-slip tile layer. The interface agent layer is rolled onto the floor slab. The quick-drying thick self-leveling mortar layer is a building material composed of ordinary silicate cement, sulfur-aluminum cement, calcium oxide, fine sedimentary beads, and dried river sand. The quick-drying thick self-leveling mortar layer is poured onto the interface agent layer. The JS waterproofing... The first layer is applied on top of the quick-drying, thick self-leveling mortar layer. The waterproof backing board layer is made of extruded polystyrene board and is fixed to the JS waterproof layer by adhesive strips with a quincunx pattern. The surface of the waterproof backing board layer has a slightly roughened finish. The tile adhesive layer is sloping with the thinnest part at the drain location. The anti-slip floor tile layer is bonded to the tile adhesive layer. The top of the drain pipe is 5mm lower than the top of the waterproof backing board layer. The drain includes a lower pipe body at the bottom and an upper bowl at the top. The lower pipe body and the upper bowl are connected. The lower pipe body is inserted inside the drain pipe. The bowl is located above the waterproof backing board layer, and the top of the bowl is flush with the anti-slip floor tile layer.

[0007] Preferably, the quick-drying thick self-leveling mortar layer is adhered to the outside of the drainage pipe.

[0008] Preferably, the waterproof backing board layer and the drainage pipe have a first gap, and the waterproof backing board layer and the lower pipe body form a second gap, with waterproof adhesive provided between the first gap and the second gap.

[0009] Preferably, there is a rounded transition between the lower tube and the upper bowl.

[0010] Preferably, there is a gap three between the top of the waterproof backing board layer and the bottom of the upper bowl, and there is a spacing within the gap three. The outer wall of the upper bowl is in the shape of an outwardly flared step. The top of the outer wall of the upper bowl is attached to the anti-slip floor tile layer, and a gap four is formed between the bottom of the outer wall of the upper bowl and the anti-slip floor tile layer. Waterproof adhesive is applied between the gap three and the gap four.

[0011] Preferably, the thickness of the quick-drying thick self-leveling mortar layer is less than or equal to 2cm, the JS waterproof layer extends 0.3m up the walls on all four sides, the thickness of the waterproof backing board layer is 20mm, the thickness of the tile adhesive layer is 5-15mm, the thinnest part of the tile adhesive layer is 5mm at the drain location, and the height of the anti-slip tile layer is 10mm.

[0012] The beneficial effects of this utility model are reflected in the following: The drain and waterproof board finishing structure of this application uses a quick-drying thick self-leveling mortar layer and a waterproof backing board layer as the leveling layer, which has the characteristics of fast construction speed and fast hardening speed. It initially sets two hours after construction and can be walked on after four hours, with high flatness. The leveling layer is formed by bonding the waterproof backing board layer, which is simple, convenient and efficient to construct. The bonding area of ​​the waterproof backing board layer with the quincunx-shaped distribution of adhesive strips is preferably greater than or equal to 40%, which ensures structural stability. The surface of the waterproof backing board layer has a micro-roughened treatment, and the bonding strength with the tile adhesive is greater than or equal to 1.8MPa. Therefore, this construction structure can meet the advantages of integrity and high construction efficiency. Moreover, the leveling layer is only composed of a quick-drying thick self-leveling mortar layer and a waterproof backing board layer, and the total height does not exceed 40mm. Thus, the total height after leveling with the tile adhesive layer does not exceed 55mm, avoiding encroachment on the net height of the room and preventing the bathroom floor from being higher than the living room floor. In addition, at the drain outlet, the top of the drain pipe is 5mm lower than the top of the waterproof backing board layer. The drain and its layout are designed with a unique structure, so that the outside of the drain has gap one, gap two, gap three and gap four, which are used to install waterproof glue to firmly fix the drain and form a stable and solid structure.

[0013] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention; the main objectives and other advantages of this invention may be realized and obtained by means of the methods particularly pointed out in the description. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is an enlarged view of the drain in an embodiment of this utility model.

[0015] Attached diagram labels: 1. Floor slab; 2. Drainage pipe; 3. Floor drain; 31. Lower pipe body; 32. Upper bowl opening; 33. Gap 1; 34. Gap 2; 35. Gap 3; 36. Gap 4; 37. Waterproof adhesive; 4. Interface agent layer; 5. Quick-drying thick self-leveling mortar layer; 6. JS waterproof layer; 7. Waterproof backing board layer; 8. Tile adhesive layer; 9. Anti-slip floor tile layer. Detailed Implementation

[0016] The technical solution of this utility model will be described in detail below through embodiments. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solution of this utility model, and should not be construed as limiting the technical solution of this utility model.

[0017] like Figure 1 and Figure 2 A drain and waterproofing board termination structure includes a floor slab 1 and a drain pipe 2 penetrating the floor slab 1. A drain 3 is installed at the top of the drain pipe 2. From bottom to top, the outer side of the drain pipe 2 on the floor slab 1 is arranged with an interface agent layer 4, a quick-drying thick self-leveling mortar layer 5, a JS waterproofing layer 6, a waterproofing backing board layer 7, a tile adhesive layer 8, and an anti-slip tile layer 9. The interface agent layer 4 is rolled onto the floor slab 1. The quick-drying thick self-leveling mortar layer 5 is a building material composed of ordinary silicate cement, sulfur-aluminum cement, calcium oxide, fine sedimentary beads, and dried river sand. The quick-drying thick self-leveling mortar layer 5 is poured onto the interface agent layer 4. The JS waterproofing layer 6 is applied onto the quick-drying thick self-leveling mortar layer. On layer 5, the waterproof backing board layer 7 is assembled from extruded polystyrene boards. The waterproof backing board layer 7 is fixed to the JS waterproof layer 6 by adhesive strips with plum blossom-shaped distribution points. The surface of the waterproof backing board layer 7 has a slightly rough surface treatment. The tile adhesive layer 8 is sloping with the thinnest part at the location of the floor drain 3. The anti-slip floor tile layer 9 is bonded to the tile adhesive layer 8. The top of the drain pipe 2 is 5mm lower than the top of the waterproof backing board layer 7. The floor drain 3 includes a lower pipe body 31 at the bottom and an upper bowl 32 at the top. The lower pipe body 31 and the upper bowl 32 are connected. The lower pipe body 31 is inserted inside the drain pipe 2. The bowl is located above the waterproof backing board layer 7, and the top of the bowl is flush with the anti-slip floor tile layer 9.

[0018] A quick-drying, thick self-leveling mortar layer 5 is bonded to the outside of the drainage pipe 2. The waterproof backing board layer 7 has a gap 33 with the drainage pipe 2, and a gap 34 is formed between the waterproof backing board layer 7 and the lower pipe body 31. Waterproof adhesive 37 is applied between gap 33 and gap 34. The lower pipe body 31 and the upper bowl 32 have a rounded transition.

[0019] The top of the waterproof backing board layer 7 and the bottom of the upper bowl 32 have a gap 35, and there is a spacing within the gap 35. The outer wall of the upper bowl 32 is stepped outward. The top of the outer wall of the upper bowl 32 is attached to the anti-slip floor tile layer 9. A gap 4 36 is formed between the bottom of the outer wall of the upper bowl 32 and the anti-slip floor tile layer 9. Waterproof adhesive 37 is provided between the gap 35 and the gap 4 36.

[0020] The thickness of the quick-drying thick self-leveling mortar layer 5 is less than or equal to 2cm. The JS waterproof layer 6 extends 0.3m up the walls on all four sides. The thickness of the waterproof backing board layer 7 is 20mm. The thickness of the tile adhesive layer 8 is 5-15mm. The thinnest part of the tile adhesive layer 8 is 5mm at the location of the floor drain 3. The height of the anti-slip floor tile layer 9 is 10mm.

[0021] The drain 3 and waterproofing board finishing structure of this application uses a quick-drying thick self-leveling mortar layer 5 and a waterproofing backing board layer 7 as the leveling layer. It features fast construction and fast hardening speed. It initially sets two hours after construction and can be walked on after four hours. It also has high flatness. The leveling layer is formed by bonding the waterproofing backing board layer 7. The construction is simple, convenient and efficient. The bonding area of ​​the waterproofing backing board layer 7 with the bonding strips distributed in a quincunx pattern is preferably greater than or equal to 40% to ensure structural stability. The surface of the waterproofing backing board layer 7 has a micro-roughened treatment and can achieve a bonding strength of greater than or equal to 1.8MPa with the tile adhesive. Therefore, this construction structure can meet the advantages of integrity and high construction efficiency. Moreover, the leveling layer consists only of the quick-drying thick self-leveling mortar layer 5 and the waterproofing backing board layer 7. The total height does not exceed 40mm. Therefore, the total height after leveling with the tile adhesive layer 8 does not exceed 55mm, which avoids encroaching on the net height of the room and prevents the bathroom floor from being higher than the living room floor. In addition, at the closing point of the drain 3, the top of the drain pipe 2 is 5mm lower than the top of the waterproof backing board layer 7. The drain 3 is designed with a unique structure and layout, so that the outer side of the drain 3 has gap 1 33, gap 2 34, gap 3 35 and gap 4 36, which are used to install waterproof glue 37 to firmly fix the drain 3, forming a stable and solid structure.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drain and waterproofing board finishing structure, characterized in that: The system includes a floor slab (1) and a drainage pipe (2) penetrating the floor slab (1). A floor drain (3) is installed at the top of the drainage pipe (2). From bottom to top, the outer side of the drainage pipe (2) on the floor slab (1) is arranged with an interface agent layer (4), a quick-drying thick self-leveling mortar layer (5), a JS waterproof layer (6), a waterproof backing board layer (7), a tile adhesive layer (8), and an anti-slip floor tile layer (9). The interface agent layer (4) is rolled onto the floor slab (1), the quick-drying thick self-leveling mortar layer (5) is poured onto the interface agent layer (4), the JS waterproof layer (6) is brushed onto the quick-drying thick self-leveling mortar layer (5), and the waterproof backing board layer (7) is assembled from extruded polystyrene boards. The waterproof backing board layer (7) is connected to the floor slab (1) by means of a duct. The plum blossom-shaped distribution of adhesive strips is fixed to the JS waterproof layer (6). The surface of the waterproof backing board layer (7) has a slightly rough surface treatment. The tile adhesive layer (8) is the thinnest slope at the location of the drain (3). The anti-slip floor tile layer (9) is bonded to the tile adhesive layer (8). The top of the drain pipe (2) is 5mm lower than the top of the waterproof backing board layer (7). The drain (3) includes a lower pipe body (31) at the bottom and an upper bowl (32) at the top. The lower pipe body (31) and the upper bowl (32) are connected. The lower pipe body (31) is inserted inside the drain pipe (2). The bowl is located above the waterproof backing board layer (7). The top of the bowl is flush with the anti-slip floor tile layer (9).

2. The drain and waterproof plate closing structure according to claim 1, characterized in that: The quick-drying thick self-leveling mortar layer (5) is attached to the outside of the drainage pipe (2).

3. The drain and waterproof plate closing structure according to claim 2, characterized in that: The waterproof backing board layer (7) has a gap one (33) with the drain pipe (2), and a gap two (34) is formed between the waterproof backing board layer (7) and the lower pipe body (31). Waterproof adhesive (37) is provided between the gap one (33) and the gap two (34).

4. The drain and waterproof plate closing structure according to claim 3, characterized in that: There is a rounded transition between the lower tube body (31) and the upper bowl mouth (32).

5. The drain and waterproof plate closing structure according to claim 4, characterized in that: The top of the waterproof backing board layer (7) and the bottom of the upper bowl (32) have a gap three (35), and there is a gap in the gap three (35). The outer wall of the upper bowl (32) is in the shape of an outwardly flared step. The top of the outer wall of the upper bowl (32) is attached to the anti-slip floor tile layer (9). The bottom of the outer wall of the upper bowl (32) and the anti-slip floor tile layer (9) form a gap four (36). Waterproof adhesive (37) is installed between the gap three (35) and the gap four (36).

6. The drain and waterproof plate closing structure according to claim 5, characterized in that: The thickness of the quick-drying thick self-leveling mortar layer (5) is less than or equal to 2cm, the JS waterproof layer (6) extends 0.3m up the walls on all four sides, the thickness of the waterproof backing board layer (7) is 20mm, the thickness of the tile adhesive layer (8) is 5-15mm, the thinnest part of the tile adhesive layer (8) is 5mm at the drain (3), and the height of the anti-slip floor tile layer (9) is 10mm.