A device for preventing wall surface cracking

Abstract

The utility model discloses a kind of wall surface cracking prevention devices, including sequentially arranged assembly type wallboard from inside to outside, phase-change crack resistance structure and heat preservation crack resistance structure;Phase-change crack resistance structure includes multiple columns along the phase-change layer of assembly type wallboard outside surface arrangement, steel wire mesh connected between two phase-change layers and foamed cement layer covered outside phase-change layer and steel wire mesh;Heat preservation crack resistance structure includes sequentially arranged adhesive layer, modified polystyrene board, glass fiber gridding, anti-cracking mortar layer and fiber cement board, adhesive layer is arranged on foamed cement layer.The utility model is simple in structure, absorbs or emits heat through phase-change crack resistance structure, reduces heat accumulation or promotes heat emission, to reduce the temperature variation range of wall, to reduce the cracking caused by thermal stress;In addition, through heat preservation crack resistance structure, further avoid the cracking of wall, and have heat insulation and fireproof performance, improve service life and aesthetic property.

Description

Technical Field

[0001] This utility model belongs to the field of building wall technology, and in particular relates to a device for preventing wall cracking. Background Technology

[0002] Prefabricated buildings are constructed by assembling prefabricated components on-site. The main prefabricated components are prefabricated wall panels, which are manufactured in workshops, significantly improving construction efficiency. However, existing prefabricated wall panels are assembled from multiple prefabricated panels, resulting in gaps at the joints and a tendency for cracking later on, leading to poor aesthetics and durability. Furthermore, changes in temperature cause variations in the building's thermal stress, causing cracking and further reducing aesthetics and durability. Additionally, while the polymer mortar protective layer on the walls protects against cracking and water seepage, it too can expand and contract under drastic temperature changes, leading to cracks due to thermal deformation.

[0003] Therefore, there is currently a lack of a simple and well-designed anti-crack device for walls that can absorb or dissipate heat through a phase change crack-resistant structure, thereby reducing heat accumulation or promoting heat dissipation and reducing the temperature fluctuation of the wall, thus reducing cracking caused by thermal stress. In addition, the thermal insulation and crack-resistant structure can further prevent cracking of the wall, and has heat insulation and fireproof properties, improving service life and aesthetics. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a wall crack prevention device that addresses the shortcomings of the prior art. The device has a simple structure and reasonable design. It absorbs or dissipates heat through a phase change crack-resistant structure, reducing heat accumulation or promoting heat dissipation to reduce the temperature change of the wall and thus reducing cracking caused by thermal stress. In addition, the heat-insulating and crack-resistant structure further prevents cracking of the wall and has heat insulation and fireproof properties, improving service life and aesthetics.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a wall crack prevention device, characterized in that: it includes an assembled wall panel, a phase change crack-resistant structure and a thermal insulation crack-resistant structure arranged sequentially from the inside to the outside; The phase change crack-resistant structure includes multiple rows of phase change layers arranged along the outer side of the prefabricated wall panel, a wire mesh connecting two rows of phase change layers, and a foamed cement layer covering the phase change layers and the wire mesh. The thermal insulation and crack-resistant structure includes an adhesive layer, a modified polystyrene board, a fiberglass mesh, a crack-resistant mortar layer, and a fiber cement board arranged in sequence, with the adhesive layer placed on the foamed cement layer.

[0006] The aforementioned anti-crack wall device is characterized in that: each column of the phase change layer includes multiple phase change blocks arranged sequentially along the height direction of the prefabricated wall panel, two adjacent phase change blocks are respectively referred to as upper phase change block and lower phase change block, the bottom of the upper phase change block is integrally provided with a U-shaped connecting part, the top of the lower phase change block is integrally provided with a convex connecting part, and expansion screws are passed through the U-shaped connecting part and the convex connecting part, and two adjacent phase change blocks are set on the prefabricated wall panel by expansion screws.

[0007] The above-mentioned anti-crack device for walls is characterized in that: the straight groove wall of the U-shaped connecting part is provided with two symmetrically arranged spring pins, the two sides of the convex connecting part are provided with slots that cooperate with the spring pins, and the U-shaped connecting part and the convex connecting part are spliced ​​together.

[0008] The above-mentioned anti-crack wall device is characterized in that: pressure plates are provided on both sides of the phase change block, the end of the wire mesh extends into the space between the pressure plate and the prefabricated wall panel, and the pressure plate, the end of the wire mesh and the prefabricated wall panel are connected by steel nails. A first insulation nail is also inserted between the wire mesh and the prefabricated wall panel.

[0009] The above-mentioned anti-crack wall device is characterized in that: the adhesive layer is a cement-based polymer adhesive mortar layer, and the modified polystyrene board is provided with a plurality of second insulation nails, which penetrate through the adhesive layer and the foamed cement layer and extend into the prefabricated wall panel; The fiberglass mesh is applied to the modified polystyrene board using adhesive tape, and the fiberglass mesh is embedded in the crack-resistant mortar layer.

[0010] The aforementioned anti-crack wall device is characterized in that: the fiber cement board is attached to the crack-resistant mortar layer by a polymer cement-based adhesive.

[0011] This utility model has the following advantages compared with the prior art: 1. This utility model is equipped with a phase change layer, which can absorb or dissipate heat, reduce heat accumulation or promote heat dissipation, thereby playing a certain role in temperature regulation, avoiding drastic changes in ambient temperature, reducing the temperature change range of the wall, and thus reducing cracking caused by thermal stress; in addition, the steel wire mesh and foamed cement layer are set up, which together enhance strength and compensate for the difference in thermal expansion and contraction, preventing cracking caused by temperature changes, and thus avoiding cracks at the joints of the wall.

[0012] 2. This utility model sets up an adhesive layer and a modified polystyrene board. The modified polystyrene board is installed through the adhesive layer. The modified polystyrene board has higher compressive and tensile strength, better thermal insulation performance, and smaller deformation. It can better resist the deformation caused by environmental hot and cold cycles, providing a more solid base for the subsequent surface layer and reducing the risk of cracking.

[0013] 3. This utility model incorporates fiber cement board, crack-resistant mortar layer, and fiberglass mesh. The fiber cement board and crack-resistant mortar layer work together to prevent moisture penetration, and their combination keeps the thermal insulation and crack-resistant structure dry, resulting in good overall thermal insulation and fire resistance. In addition, the fiberglass mesh prevents cracking of the crack-resistant mortar layer. The three components work together to enhance the overall wall's resistance to external impacts, making it less prone to dents or cracks. Furthermore, the fiber cement board has high strength and deformation resistance, effectively resisting the large stresses generated by structural deformation and preventing cracks.

[0014] In summary, the structure is simple and rationally designed. By absorbing or dissipating heat through the phase change crack-resistant structure, it reduces heat accumulation or promotes heat dissipation, thereby reducing the temperature fluctuation range of the wall and thus reducing cracking caused by thermal stress. In addition, the thermal insulation and crack-resistant structure further prevents cracking of the wall and has heat insulation and fireproof properties, improving service life and aesthetics.

[0015] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the phase change crack-resistant structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the phase change layer of this utility model.

[0019] Explanation of reference numerals in the attached figures: 1—Prefabricated wall panel; 2—Phase change crack-resistant structure; 21—Phase change layer; 211—Upper phase changer block; 212—Lower phase changer block; 213—U-shaped connection part; 214—convex connecting part; 215—spring pin; 216—expansion bolt; 217—Pressure plate; 22—Wire mesh; 23—Steel nail; 24—Foamed cement layer; 25—First insulation nail; 3—Adhesive layer; 4—Modified polystyrene board; 5—Glass fiber mesh; 6—Crack-resistant mortar layer; 7—Fiber cement board; 8—Second insulation nail. Detailed Implementation

[0020] like Figures 1 to 3 As shown, this utility model includes an assembled wall panel 1, a phase change crack-resistant structure 2, and a thermal insulation crack-resistant structure arranged sequentially from the inside to the outside. The phase change crack-resistant structure 2 includes multiple rows of phase change layers 21 arranged along the outer side of the prefabricated wall panel 1, a wire mesh 22 connected between two rows of phase change layers 21, and a foamed cement layer 24 covering the phase change layers 21 and the wire mesh 22. The thermal insulation and crack-resistant structure includes an adhesive layer 3, a modified polystyrene board 4, a glass fiber mesh 5, a crack-resistant mortar layer 6, and a fiber cement board 7 arranged in sequence. The adhesive layer 3 is disposed on the foamed cement layer 24.

[0021] like Figure 3 As shown in this embodiment, each column of phase change layers 21 includes multiple phase change blocks arranged sequentially along the height direction of the prefabricated wall panel 1. Two adjacent phase change blocks are respectively referred to as upper phase change block 211 and lower phase change block 212. The bottom of the upper phase change block 211 is integrally provided with a U-shaped connecting part 213, and the top of the lower phase change block 212 is integrally provided with a convex connecting part 214. Expansion screws 216 are passed through the U-shaped connecting part 213 and the convex connecting part 214. Two adjacent phase change blocks are mounted on the prefabricated wall panel 1 by means of expansion screws 216.

[0022] In this embodiment, the straight groove wall of the U-shaped connecting part 213 is provided with two symmetrically arranged spring pins 215, and the two sides of the convex connecting part 214 are provided with slots that cooperate with the spring pins 215. The U-shaped connecting part 213 and the convex connecting part 214 are spliced ​​together.

[0023] like Figure 2 As shown, in this embodiment, pressure plates 217 are provided on both sides of the phase change block, and the end of the wire mesh 22 extends between the pressure plate 217 and the prefabricated wall panel 1. The pressure plate 217, the end of the wire mesh 22 and the prefabricated wall panel 1 are connected by steel nails 23. A first insulation nail 25 is also inserted between the wire mesh 22 and the prefabricated wall panel 1.

[0024] In this embodiment, the bonding layer 3 is a cement-based polymer bonding mortar layer, and the modified polystyrene board 4 is provided with a plurality of second insulation nails 8, which pass through the bonding layer 3 and the foamed cement layer 24 and extend into the prefabricated wall panel 1. The fiberglass mesh 5 is attached to the modified polystyrene board 4 by adhesive tape, and the fiberglass mesh 5 is embedded in the crack-resistant mortar layer 6.

[0025] In this embodiment, the fiber cement board 7 is attached to the crack-resistant mortar layer 6 using a polymer cement-based adhesive.

[0026] In this embodiment, the phase change block is an aluminum box filled with microcapsule phase change material. The aluminum box prevents leakage of the microcapsule phase change material and meets the strength requirements. Furthermore, by setting the phase change block, the phase change temperature of the material is set to 18℃~25℃. When the temperature is higher than the phase change temperature, the phase change block absorbs heat; when the temperature is lower than the phase change temperature, the phase change block dissipates heat. This provides a certain degree of temperature regulation, reducing heat accumulation or promoting heat dissipation, and preventing large temperature fluctuations in the wall. This reduces the amplitude of temperature changes in the wall, thereby reducing cracking caused by thermal stress. It should be noted that heat absorption and release can also be achieved for indoor heating in winter. It should also be noted that the phase change temperature of the microcapsule phase change material can be adaptively adjusted according to the actual usage environment to meet the requirements of heat absorption or release.

[0027] In this embodiment, the thickness of the phase change block is not specifically limited during implementation. It is less than the thickness of the foamed cement layer 24, depending on the actual construction requirements.

[0028] In this embodiment, foamed cement is placed outside the phase change layer 21 and the wire mesh 22 to accommodate the thermal expansion and contraction of the aluminum box. Furthermore, the wire mesh and foamed cement layers enhance strength and compensate for differences in thermal expansion and contraction, preventing cracking caused by temperature changes and thus avoiding cracks at the wall joints.

[0029] In this embodiment, the thickness of the foamed cement layer 24, the adhesive layer 3, and the crack-resistant mortar layer 6 is not specifically limited, as long as the construction requirements are met.

[0030] In this embodiment, the U-shaped connecting part 213 and the convex connecting part 214 are provided with matching mounting holes to facilitate the insertion of the expansion screw 216.

[0031] In this embodiment, a spring pin 215 is set to cooperate with a slot so that the upper phase change block 211 and the lower phase change block 212 can be inserted through it, and then fixed on the prefabricated wall panel 1 by expansion screws 216, which makes construction and installation convenient.

[0032] In this embodiment, the spring pin 215 can be referenced to the straight column type spring ball, which can achieve pre-connection and facilitate the subsequent installation of the expansion screw 216.

[0033] In this embodiment, pressure plates 217 are provided on both sides of the phase change block. These pressure plates compress the ends of the wire mesh 22, facilitating the subsequent installation of steel nails 23 on the pressure plates 217 and the ends of the wire mesh 22. The steel nails 23 then allow the wire mesh 22 to be installed on the prefabricated wall panel 1. The addition of a first insulation nail 25 further improves the connection stability of the wire mesh 22.

[0034] In this embodiment, when implemented, a wire mesh 22 is provided at the splicing joint of two adjacent prefabricated wall panels 1. In this way, the wire mesh 22, the foamed cement layer 24 and the phase change layer 21 work together to resist changes in ambient temperature and reduce cracking caused by gaps at the connection of adjacent prefabricated wall panels.

[0035] In this embodiment, fiber cement board 7, crack-resistant mortar layer 6, and fiberglass mesh 5 are arranged. Fiber cement board 7 and crack-resistant mortar layer 6 work together to block moisture penetration, ensuring the thermal insulation and crack-resistant structure remains dry and providing good overall fire resistance. In addition, fiberglass mesh 5 prevents cracking of crack-resistant mortar layer 6. The three components work together to enhance the overall wall's resistance to external impacts, making it less prone to dents or cracks. Furthermore, fiber cement board 7 has high strength and deformation resistance, effectively resisting the large stress generated by structural deformation and preventing cracks. It also has thermal insulation and fireproof properties, improving service life and aesthetics.

[0036] In this embodiment, a fiberglass mesh 5 is installed outside the modified polystyrene board 4. The fiberglass mesh 5 further prevents cracking of the wall and has heat insulation and anti-corrosion properties. Together with the modified polystyrene board 4, it improves the thermal insulation effect.

[0037] In this embodiment, in actual use, the cement-based polymer bonding mortar used for the bonding layer 3 can refer to ZYT-003 cement-based polymer bonding mortar. The crack-resistant mortar layer 6 can refer to ZYT-002 polymer crack-resistant mortar.

[0038] In this embodiment, when the glass fiber mesh 5 is applied to the modified polystyrene board 4 with adhesive tape, the adhesive can be epoxy resin, which has high bonding strength and good weather resistance.

[0039] In this embodiment, during actual use, plastic foam rods and silicone sealant are used to seal the joints of the fiber cement board 7 to prevent moisture penetration and accommodate deformation. The thickness of the fiber cement board 7 is 12mm to 15cm, which is selected according to construction requirements and is not specifically limited.

[0040] In this embodiment, in actual use, the polymer cement-based adhesive can refer to conventional tile adhesives or others in the art, as long as they meet the requirements for fiber cement board installation.

[0041] In this embodiment, the thickness of the modified polystyrene board 4 is 30mm to 60mm, which can be adjusted according to construction requirements. Plastic foaming rods and silicone sealant are used to seal the joints between adjacent modified polystyrene boards 4, preventing moisture penetration and accommodating deformation. The stability of the insulation layer of the modified polystyrene board 4 is improved by using a second insulation nail 8.

[0042] In this embodiment, the adhesive layer 3 is provided because it enables the installation of the modified polystyrene board. The adhesive layer 3 and the modified polystyrene board have extremely strong bonding strength and shear strength, providing dual resistance to thermal expansion and contraction caused by changes in ambient temperature, thus ensuring the stability of the modified polystyrene board 4. The modified polystyrene board 4 is also included to improve the thermal insulation effect of the wall and enhance building energy efficiency.

[0043] In summary, the structure is simple and rationally designed. By absorbing or dissipating heat through the phase change crack-resistant structure, it reduces heat accumulation or promotes heat dissipation, thereby reducing the temperature fluctuation range of the wall and thus reducing cracking caused by thermal stress. In addition, the thermal insulation and crack-resistant structure further prevents cracking of the wall and has heat insulation and fireproof properties, improving service life and aesthetics.

[0044] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A device for preventing wall cracking, characterized in that: It includes prefabricated wall panels (1), phase change crack-resistant structure (2), and thermal insulation crack-resistant structure arranged sequentially from the inside to the outside; The phase change crack-resistant structure (2) includes multiple rows of phase change layers (21) arranged along the outer side of the prefabricated wall panel (1), a wire mesh (22) connecting two rows of phase change layers (21), and a foamed cement layer (24) covering the phase change layers (21) and the wire mesh (22). The thermal insulation and crack-resistant structure includes an adhesive layer (3), a modified polystyrene board (4), a glass fiber mesh (5), a crack-resistant mortar layer (6), and a fiber cement board (7) arranged in sequence. The adhesive layer (3) is placed on the foamed cement layer (24).

2. The anti-crack device for walls according to claim 1, characterized in that: Each of the phase change layers (21) includes multiple phase change blocks arranged sequentially along the height direction of the prefabricated wall panel (1). Two adjacent phase change blocks are respectively referred to as upper phase change block (211) and lower phase change block (212). The bottom of the upper phase change block (211) is integrally provided with a U-shaped connecting part (213), and the top of the lower phase change block (212) is integrally provided with a convex connecting part (214). Expansion screws (216) are passed through the U-shaped connecting part (213) and the convex connecting part (214). Two adjacent phase change blocks are set on the prefabricated wall panel (1) by expansion screws (216).

3. A wall crack prevention device according to claim 2, characterized in that: The U-shaped connecting part (213) has two symmetrically arranged spring pins (215) on its straight groove wall, and the convex connecting part (214) has slots on both sides to cooperate with the spring pins (215). The U-shaped connecting part (213) and the convex connecting part (214) are spliced ​​together.

4. A wall crack prevention device according to claim 2, characterized in that: The phase change block is provided with pressure plates (217) on both sides, and the end of the wire mesh (22) extends into the space between the pressure plate (217) and the prefabricated wall panel (1). The pressure plate (217), the end of the wire mesh (22) and the prefabricated wall panel (1) are connected by steel nails (23). A first insulation nail (25) is also inserted between the wire mesh (22) and the prefabricated wall panel (1).

5. A wall crack prevention device according to claim 4, characterized in that: The bonding layer (3) is a cement-based polymer bonding mortar layer, and the modified polystyrene board (4) is provided with a plurality of second insulation nails (8). The second insulation nails (8) pass through the bonding layer (3) and the foamed cement layer (24) and extend into the prefabricated wall panel (1). The glass fiber mesh (5) is attached to the modified polystyrene board (4) by adhesive tape, and the glass fiber mesh (5) is embedded in the crack-resistant mortar layer (6).

6. A wall crack prevention device according to claim 1, characterized in that: The fiber cement board (7) is attached to the crack-resistant mortar layer (6) by a polymer cement-based adhesive.

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