Dampproofing outer wall brick with water guiding function
By introducing a multi-layered structure of water-absorbing, water-conducting, and drainage layers into the exterior wall bricks, the problem of weak waterproofing areas at the joints of the exterior wall bricks is solved, enabling rapid drainage and bidirectional water flow, preventing damage to the finishing layer, and improving the durability of the building's exterior walls.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANAN KUODA BUILDING MATERIALS CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-06-12
AI Technical Summary
When cement-based grout is used on existing exterior wall bricks, the joints are prone to becoming weak waterproof areas. The lack of effective water vapor diffusion channels and active drainage mechanisms leads to water retention and causes defects such as cracking and peeling of the finishing layer.
The exterior wall bricks feature a three-layer structure, including an absorbent layer, a water-conducting layer, and a drainage layer. The water-conducting layer, made of fiber material, and the corrugated grooves create micropores. Combined with the water pipes and the building's drainage system, this enables the active discharge and bidirectional drainage of water.
It effectively prevents moisture from accumulating in the joint cavity, avoids freeze-thaw damage, improves climate adaptability, and extends the service life of building exterior walls.
Smart Images

Figure CN224351546U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of exterior wall brick technology, specifically a moisture-proof exterior wall brick with water-diverting function. Background Technology
[0002] Exterior wall bricks are a type of brick material used for the decoration and protection of building facades. They typically have strong weather resistance, water resistance, and stain resistance. At the same time, exterior wall bricks can also enhance the aesthetics of buildings. Common colors and textures are diverse and can meet the needs of different design styles.
[0003] To overcome the aforementioned deficiencies, a prior art Chinese patent (publication number: CN212248868U) discloses a waterproof exterior wall tile, comprising a tile body, a first engaging structure for left-right engagement between adjacent exterior wall tiles, and a second engaging structure for vertical engagement between upper and lower exterior wall tiles. One side of the tile body has a waterproof slope, including an upper end face and a lower end face. Several rows of horizontal pipes aligned with the lower end face of the waterproof slope are arranged on the slope. A sloping groove is provided between the waterproof slope and the tile body, extending from the upper end face to the lower end face. A water-blocking groove is also provided between the sloping groove and the second engaging structure to prevent water flowing through the waterproof slope from entering the tile body. This design prevents rainwater erosion of the wall and meets structural load-bearing requirements.
[0004] While existing technologies can overcome the shortcomings mentioned above, other problems still exist in their operation: as an important component of the building envelope, exterior wall bricks need to bear the basic waterproofing function. Existing exterior wall bricks generally improve their waterproofing performance through material modification or structural innovation. When cement-based grout is used for block bonding, weak waterproofing areas are easily formed at the joints. The joint system formed by traditional construction methods lacks effective water vapor diffusion channels and active drainage mechanisms, resulting in water trapped in the cavity not being able to be discharged in time. Under freeze-thaw cycles or thermal stress, secondary diseases such as cracking and peeling of the finishing layer are easily caused. Utility Model Content
[0005] The purpose of this invention is to provide a moisture-proof exterior wall brick with water-diverting function, in order to solve the problem in the above-mentioned background technology that when cement-based grout is used for block bonding, the joint area is prone to forming a weak waterproof area, and the joint system formed by the traditional construction method lacks an effective water vapor diffusion channel and an active drainage mechanism.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a moisture-proof exterior wall brick with water-diverting function, comprising an inner wall and an outer wall, wherein the outer wall is fixedly connected to the outer side of the inner wall, and the inner wall and the outer wall constitute the overall structure of the building exterior wall;
[0007] The outer wall is formed by the construction of outer wall bricks, and the joints between the outer wall bricks are filled with adhesive material. The outer wall bricks are composed of an absorbent layer, a water-conducting layer and a drainage layer stacked in sequence.
[0008] Preferably, the water-guiding layer is composed of mutually parallel fiber materials, with the two ends of the fibers being perpendicularly connected to the drainage layer and the water-absorbing layer, respectively, and the fibers of the water-guiding layer forming micropores with a diameter of 0.01-0.1 mm.
[0009] Preferably, the absorbent layer is made of absorbent material, and the drainage layer is made of a porous structure with ceramic aggregate as the main component.
[0010] Preferably, the connection surfaces of the water-absorbing layer and the water-guiding layer, as well as the connection surfaces of the water-guiding layer and the drainage layer, are provided with grooves, and the grooves form a continuous wave-shaped structure on the connection surfaces.
[0011] Preferably, the absorbent layer has drainage grooves that are evenly spaced on the side away from the water-conducting layer. The drainage grooves are arranged vertically and form a wavy groove structure on the outer surface of the absorbent layer.
[0012] Preferably, the inner wall includes a structural layer and a waterproof layer, the waterproof layer is located between the structural layer and the outer wall brick body, and a water pipe is fixedly installed on the side of the waterproof layer away from the structural layer.
[0013] Preferably, the water guide pipe is located at the bottom of the drainage layer and close to the side of the waterproof layer. The water guide pipe is connected to the building drainage pipe, and the water guide pipe is provided with equidistantly distributed water inlet holes. The water inlet holes face the bottom area of the drainage layer, and an intercepting net is fixedly installed inside the water inlet holes.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] This type of moisture-proof exterior wall brick with water-diverting function works synergistically with the three-layer structure of the adhesive material and the exterior wall brick body to create drainage channels in the joint area. The directional fiber structure of the water-diverting layer quickly guides the water that seeps into the joint into the drainage layer through capillary effect. Combined with the centralized collection and discharge of the bottom water pipe, it realizes the active discharge of water seepage from the joint, prevents water from stagnating in the joint cavity, and prevents the adhesive material from being damaged by freeze-thaw.
[0016] The fiber pore structure of the water-conducting layer and the wavy groove of the drainage channel together form a water diffusion network. The fiber pores drive water migration through capillary force, so that water vapor in the cavity can be simultaneously guided in both vertical and horizontal directions, avoiding the problem of surface layer cracking caused by vapor pressure accumulation, and significantly improving the climate adaptability of the exterior wall system. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0018] Figure 2 This is a schematic diagram of the exploded structure of this utility model;
[0019] Figure 3 This is a schematic diagram of the exterior wall brick body structure of this utility model;
[0020] Figure 4 This is a schematic diagram of the adhesive material structure of this utility model;
[0021] Figure 5 This is a schematic diagram of the slotted structure of this utility model;
[0022] Figure 6 This is a schematic diagram of the water pipe structure of this utility model.
[0023] In the diagram: 1. Inner wall; 2. Outer wall; 3. Structural layer; 4. Waterproof layer; 5. Exterior wall brick body; 6. Adhesive material; 7. Water-absorbing layer; 8. Water-conducting layer; 9. Drainage layer; 10. Groove; 11. Drainage channel; 12. Water pipe; 13. Water inlet; 14. Interception net. Detailed Implementation
[0024] 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.
[0025] Example 1: Please refer to Figure 1 - Figure 6This utility model provides the following technical solution: a moisture-proof exterior wall brick with water-diverting function, comprising an inner wall 1 and an outer wall 2, the outer wall 2 being fixedly connected to the outer side of the inner wall 1, and the inner wall 1 and the outer wall 2 forming an integral structure of the building's exterior wall; the outer wall 2 is formed by constructing exterior wall brick bodies 5, the joints between the exterior wall brick bodies 5 being filled with adhesive material 6, the exterior wall brick bodies 5 being composed of an absorbent layer 7, a water-conducting layer 8, and a drainage layer 9 stacked sequentially; the water-conducting layer 8 is composed of mutually parallel distributed fiber material, the two ends of the fibers being perpendicularly connected to the drainage layer 9 and the absorbent layer 7 respectively, and micropores with a diameter of 0.01-0.1mm are formed between the fibers of the water-conducting layer 8; the absorbent layer 7 is composed of absorbent material, and the drainage layer 9 is composed of a porous structure formed mainly of ceramic aggregate; the absorbent layer 7 and the water-conducting layer 9 are constructed from water-absorbing material. The connecting surfaces of the water-conducting layer 8 and the connecting surfaces of the water-conducting layer 8 and the drainage layer 9 are provided with grooves 10, which form a continuous wave-shaped structure on the connecting surfaces. The absorbent layer 7 is provided with equally spaced drainage channels 11 on the side away from the water-conducting layer 8. The drainage channels 11 are arranged vertically and form a wave-shaped groove structure on the outer side of the absorbent layer 7. The inner wall 1 includes a structural layer 3 and a waterproof layer 4. The waterproof layer 4 is located between the structural layer 3 and the outer wall brick body 5, and a water-conducting pipe 12 is fixedly installed on the side of the waterproof layer 4 away from the structural layer 3. The water-conducting pipe 12 is located at the bottom of the drainage layer 9 and close to the side of the waterproof layer 4. The water-conducting pipe 12 is connected to the building drainage pipe, and the water-conducting pipe 12 is provided with equally spaced water inlet holes 13. The water inlet holes 13 face the bottom area of the drainage layer 9, and an intercepting net 14 is fixedly installed inside the water inlet holes 13.
[0026] The outer wall 2 is formed by the outer wall brick body 5 through the bonding material 6. When rainwater comes into contact with the surface of the outer wall brick body 5, the water-absorbing layer 7 absorbs the water quickly due to its properties and conducts the water through the connection surface with the water-conducting layer 8. The water-conducting layer 8 is formed by parallel fiber materials to form vertical water-conducting channels. The tiny pores of 0.01-0.1mm between the fibers generate a capillary effect, which quickly guides the water to the drainage layer 9.
[0027] In the interlayer transition area, the wavy groove 10 increases the contact area between each layer. The continuous undulating interface structure forms multiple flow paths between the water-absorbing layer 7 and the water-conducting layer 8, and between the water-conducting layer 8 and the drainage layer 9, effectively preventing water from stagnating at the interlayer interface. The porous structure of the ceramic aggregate in the drainage layer 9 provides a stable channel for water discharge, and its open pore structure, combined with gravity, promotes the downward movement of water.
[0028] The wave-shaped drainage groove 11 set on the outer side of the exterior wall brick body 5 changes the water flow pattern through the surface geometry. The vertically arranged grooves form a directional flow channel during rainfall, which not only accelerates the rupture of the surface water film, but also guides some water directly into the working area of the water-absorbing layer 7 through the groove structure, reducing the residence time of rainwater on the exterior wall surface and improving the water absorption and drainage efficiency of the water-absorbing layer 7.
[0029] The waterproof layer 4 of the inner wall 1 serves as a seepage barrier. The water pipe 12 installed on it forms a drainage connection system with the bottom of the drainage layer 9. When water flows through the drainage layer 9 to the bottom, it enters the building drainage network through the water inlet hole 13 on the surface of the water pipe 12. The intercepting net 14 forms a physical filter at the water inlet hole 13, effectively blocking particles such as ceramic aggregate fragments from entering the drainage pipe, while maintaining smooth water flow, ensuring drainage efficiency and preventing pipe blockage.
[0030] The high-efficiency water absorption of the absorbent layer 7, the directional flow guidance of the water-conducting layer 8, and the stable discharge characteristics of the drainage layer 9 form a progressive drainage system, which significantly improves the overall drainage speed and impermeability of the exterior wall. The combination of the waterproof layer 4 and the water-conducting pipe 12 forms a complete closed loop of moisture management inside the building structure, ensuring that the discharged water will not cause secondary seepage damage to the interior of the wall.
[0031] When encountering heavy rainfall, the absorbent layer 7 mitigates the impact of instantaneous water flow through its rapid absorption and storage function. The vertical fiber structure of the water-conducting layer 8 quickly disperses water throughout the entire cross-section of the drainage layer 9, preventing localized water accumulation. The porous ceramic material of the drainage layer 9 maintains structural strength while forming stable drainage channels through interconnected pores. The equidistant arrangement of the water-conducting pipes 12 ensures that water accumulated at the bottom of the drainage layer 9 can be evenly collected and discharged. Combined with the continuous filtration function of the intercepting net 14, reliable drainage is achieved around the clock. This multi-layered collaborative working mechanism enables the exterior wall system to maintain efficient drainage performance even under harsh weather conditions, effectively extending the service life of the building's exterior walls.
[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0033] Although the present invention 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 the present invention should be included within the protection scope of the present invention.
Claims
1. A moisture-proof exterior wall brick with water-diverting function, comprising an inner wall (1) and an outer wall (2), wherein the outer wall (2) is fixedly connected to the outer side of the inner wall (1), and the inner wall (1) and the outer wall (2) constitute the overall structure of the building exterior wall; Its features are: The outer wall (2) is formed by the construction of the outer wall brick body (5), and the joints between the outer wall brick bodies (5) are filled with adhesive material (6). The outer wall brick body (5) is composed of an absorbent layer (7), a water-conducting layer (8) and a drainage layer (9) stacked in sequence.
2. A moisture-proof exterior wall brick with water-diverting function according to claim 1, characterized in that: The water-conducting layer (8) is composed of mutually parallel fiber materials. The two ends of the fibers are perpendicularly connected to the drainage layer (9) and the water-absorbing layer (7), respectively, and the fibers of the water-conducting layer (8) form micropores with a diameter of 0.01-0.1 mm.
3. A moisture-proof exterior wall brick with water-diverting function according to claim 2, characterized in that: The absorbent layer (7) is made of absorbent material, and the drainage layer (9) is made of a porous structure with ceramic aggregate as the main component.
4. A moisture-proof exterior wall brick with water-diverting function according to claim 3, characterized in that: The connection surfaces of the water-absorbing layer (7) and the water-guiding layer (8), as well as the connection surfaces of the water-guiding layer (8) and the drainage layer (9), are provided with grooves (10), and the grooves (10) form a continuous wave-shaped structure on the connection surfaces.
5. A moisture-proof exterior wall brick with water-diverting function according to claim 4, characterized in that: The absorbent layer (7) has drainage grooves (11) that are evenly spaced on the side away from the water-conducting layer (8). The drainage grooves (11) are arranged in a vertical direction and form a wave-shaped groove structure on the outer side of the absorbent layer (7).
6. A moisture-proof exterior wall brick with water-diverting function according to claim 1, characterized in that: The inner wall (1) includes a structural layer (3) and a waterproof layer (4). The waterproof layer (4) is located between the structural layer (3) and the outer wall brick body (5), and a water pipe (12) is fixedly installed on the side of the waterproof layer (4) away from the structural layer (3).
7. A moisture-proof exterior wall brick with water-diverting function according to claim 6, characterized in that: The water guide pipe (12) is located at the bottom of the drainage layer (9) and close to the side of the waterproof layer (4). The water guide pipe (12) is connected to the building drainage pipe, and the water guide pipe (12) is provided with equally spaced water inlet holes (13). The water inlet holes (13) are directly opposite the bottom area of the drainage layer (9), and an intercepting net (14) is fixedly installed inside the water inlet holes (13).