Building outer wall waterproof structure

Abstract

The utility model discloses a building outer wall waterproof structure, including self -repairing waterproof layer, honeycomb water guide layer, siphon drainage groove, breathable moistureproof layer and protection decorative layer. Self -repairing waterproof layer adopts the composite material containing crystalline growth factor, can automatic repair crack, honeycomb water guide layer and siphon drainage groove combine and realize zero slope rapid drainage, and breathable moistureproof layer passes ePTFE membrane and discharges water vapor, reduces condensation risk. The structure construction is convenient, and waterproof life is prolonged 3-5 times, is applicable to various building outer wall waterproof engineering.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, specifically to an exterior wall waterproofing structure that combines self-healing waterproofing, water drainage and breathable moisture-proof functions, and is applicable to exterior wall waterproofing projects of various civil and industrial buildings. Background Technology

[0002] The following problems are commonly found in existing building exterior wall waterproofing structures: Insufficient durability of waterproofing layers: Traditional roll or coating waterproofing layers are prone to cracking due to temperature changes and mechanical stress, and are difficult to repair. For example, roll waterproofing is prone to cracking at corners due to stress concentration, and coating waterproofing may cause localized leakage due to uneven thickness.

[0003] Limited drainage capacity: Existing structures mostly rely on surface slope for drainage, which easily leads to water accumulation and accelerates the aging of the waterproof layer. For example, although patent CN223135362U has a V-shaped water collection plate, it is not combined with the self-healing function of the waterproof layer, and the drainage holes may become blocked after long-term use.

[0004] Internal condensation risk: Traditional structures lack an effective breathable layer, preventing moisture from escaping from the insulation layer and leading to mold growth or structural damage. For example, patent CN217840398U only improves installation efficiency through mechanical fixing, without solving the breathability problem.

[0005] Construction is complex: Existing technologies often require multiple layers of materials to be stacked. For example, the flow guiding mechanism of patent CN221972496U needs to be assembled on site, which is time-consuming and prone to errors. Utility Model Content

[0006] This utility model provides an exterior wall waterproof structure that integrates self-healing waterproofing, water drainage, and breathability and moisture-proofing. Its core innovations include: Self-healing waterproof layer: Made of composite materials containing shape memory polymers or crystal growth factors, it can automatically repair cracks smaller than 0.6-1.0mm.

[0007] Three-dimensional water guiding and drainage system: By combining a honeycomb water guiding layer with a siphon drainage channel, it achieves rapid drainage with zero slope and avoids water accumulation and seepage.

[0008] Breathable and moisture-proof layer: An ePTFE microporous membrane is installed to allow water vapor to escape while blocking liquid water, reducing the risk of condensation.

[0009] Specific Structure Base treatment layer: Apply a penetrating crystalline primer to enhance adhesion to the wall.

[0010] Self-healing waterproof layer: 2-3mm thick, composed of elastomeric modified bitumen and crystal growth factor to form a continuous waterproof membrane.

[0011] Honeycomb water guiding layer: made of HDPE material, with a honeycomb pore size of 5-8mm and a slope of 3%-5%, guiding water flow to the siphon drainage channel.

[0012] Siphon drainage channel: It has a built-in siphon guide pipe and a variable diameter design to form full flow drainage, which improves drainage efficiency by 50% compared with traditional structures.

[0013] Breathable and moisture-proof layer: Lay a 0.3-0.5mm thick ePTFE membrane with a moisture permeability of ≥1500g / m²・day and wind pressure resistance (≥2.5kPa).

[0014] Protective decorative layer: Weather-resistant coatings or decorative panels are used to protect the internal structure. Compared with the prior art, the beneficial effects of this utility model are: The self-healing waterproof layer uses crystal growth factors to generate insoluble crystals upon contact with water, filling cracks; the elastomer component absorbs structural deformation stress, preventing crack propagation.

[0015] Rainwater permeates through the waterproof layer to the honeycomb water-conducting layer and is quickly discharged through the siphon drainage channel to prevent water accumulation.

[0016] ePTFE membranes allow water vapor to escape in one direction through their microporous structure, preventing condensation inside the insulation layer.

[0017] The water-conducting layer and the drainage channel form a "prevention and drainage combined" system, reducing the water pressure on the waterproof layer; the breathable layer and the self-healing layer work together to extend the overall lifespan. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a cross-sectional structural diagram of the present invention; Figure 2 This is an enlarged structural schematic diagram of the siphon drainage channel of this utility model; In the picture: 1. Self-healing waterproof layer; 2. Honeycomb water-conducting layer; 3. Siphon drainage channel; 4. Breathable and moisture-proof layer; 5. Protective and decorative layer; 6. Wall. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0020] like Figure 1-2 As shown; A waterproof structure for building exterior walls.

[0021] In this implementation plan: to solve the technical problems existing in the prior art, such as the "existing building exterior wall waterproofing structures generally have the following problems as disclosed in the background art above: Insufficient durability of waterproofing layers: Traditional roll or coating waterproofing layers are prone to cracking due to temperature changes and mechanical stress, and are difficult to repair. For example, roll waterproofing is prone to cracking at corners due to stress concentration, and coating waterproofing may cause localized leakage due to uneven thickness.

[0022] Limited drainage capacity: Existing structures mostly rely on surface slope for drainage, which easily leads to water accumulation and accelerates the aging of the waterproof layer. For example, although patent CN223135362U has a V-shaped water collection plate, it is not combined with the self-healing function of the waterproof layer, and the drainage holes may become blocked after long-term use.

[0023] Internal condensation risk: Traditional structures lack an effective breathable layer, preventing moisture from escaping from the insulation layer and leading to mold growth or structural damage. For example, patent CN217840398U only improves installation efficiency through mechanical fixing, without solving the breathability problem.

[0024] Complex construction: Existing technologies often require multiple layers of materials to be stacked. For example, the diversion mechanism of patent CN221972496U needs to be assembled on site, which is time-consuming and prone to errors. In terms of practical use, this problem is obviously real and difficult to solve. Therefore, in order to solve this technical problem, a waterproof structure for building exterior walls is provided.

[0025] like Figure 1-2 As shown in the figure; This utility model provides a technical solution: a waterproof structure for building exterior walls, comprising a self-healing waterproof layer 1, a honeycomb water-conducting layer 2, a siphon drainage channel 3, a breathable and moisture-proof layer 4, and a protective and decorative layer 5. The self-healing waterproof layer 1 is bonded to the wall 6, the honeycomb water-conducting layer 2 covers the surface of the self-healing waterproof layer 1, the siphon drainage channel 3 is connected to the edge of the honeycomb water-conducting layer 2, the breathable and moisture-proof layer 4 is laid on top of the honeycomb water-conducting layer 2, and the protective and decorative layer 5 covers the surface of the breathable and moisture-proof layer 4.

[0026] The self-healing waterproof layer 1 is composed of elastomeric modified bitumen and crystal growth factor, with a thickness of 2-3mm, and can repair cracks smaller than 0.6-1.0mm.

[0027] The honeycomb water-conducting layer 2 is made of HDPE material with a honeycomb pore size of 5-8mm and a slope of 3%-5%.

[0028] The siphon drainage channel 3 has a built-in variable diameter guide pipe, which achieves full-flow drainage through the siphon effect.

[0029] The breathable and moisture-proof layer 4 is an ePTFE microporous membrane with a moisture permeability ≥1500g / m²・day and wind pressure resistance ≥2.5kPa. The construction steps are as follows: Base treatment: Clean the wall surface, apply a penetrating crystalline primer, and allow it to dry for 24 hours.

[0030] Waterproofing layer construction: Spray or scrape on self-healing waterproofing material, with a thickness controlled at 2.5mm, and cure for 7 days.

[0031] Water-guiding layer installation: Fix the honeycomb water-guiding plate to the waterproof layer with special adhesive, with a slope of 3% and embed the siphon drainage groove at the edge.

[0032] Drainage channel installation: Align the siphon drainage channel with the edge of the water guide plate, connect them with snaps, and connect the end of the guide pipe to the rainwater pipe.

[0033] Air permeable layer installation: Cover the surface of the water-conducting layer with an ePTFE membrane, with an overlap width of ≥100mm, and seal with hot air welding.

[0034] Protective layer construction: Apply weather-resistant coating or attach decorative panels to complete the overall construction.

[0035] Self-healing waterproof layer: tensile strength ≥3.0MPa, elongation at break ≥400%, crack repair rate ≥90% (28 days).

[0036] Honeycomb water-conducting layer: compressive strength ≥450kPa, porosity ≥80%.

[0037] Siphon drainage channel: drainage flow rate ≥ 5L / s, siphon start-up time ≤ 30 seconds.

[0038] Breathable and moisture-proof layer: moisture permeability 1500-3000g / m²・day, UV aging resistant lifespan ≥25 years.

[0039] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A waterproof structure for building exterior walls, characterized in that, It includes a self-healing waterproof layer (1), a honeycomb water-conducting layer (2), a siphon drainage channel (3), a breathable and moisture-proof layer (4), and a protective and decorative layer (5). The self-healing waterproof layer (1) is bonded to the wall (6). The honeycomb water-conducting layer (2) covers the surface of the self-healing waterproof layer (1). The siphon drainage channel (3) is connected to the edge of the honeycomb water-conducting layer (2). The breathable and moisture-proof layer (4) is laid on top of the honeycomb water-conducting layer (2). The protective and decorative layer (5) covers the surface of the breathable and moisture-proof layer (4).

2. The structure of claim 1, wherein The thickness of the self-healing waterproof layer (1) is 2-3 mm.

3. The structure of claim 1, wherein The honeycomb water-conducting layer (2) is made of HDPE material with a honeycomb pore size of 5-8mm and a slope of 3%-5%.

4. The structure of claim 1, wherein The siphon drainage channel (3) has a built-in variable diameter guide pipe, which achieves full-flow drainage through the siphon effect.

5. The structure of claim 1, wherein The breathable and moisture-proof layer (4) is an ePTFE microporous membrane with a moisture permeability ≥1500g / m³. 2 • Day, wind pressure resistance ≥2.5kPa.

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