Green building environment-friendly thermal insulation wall

Abstract

The application relates to a green building environment-friendly thermal insulation wall body, relating to the technical field of green building energy-saving wall bodies, which comprises inner and outer protective layers and embedded inner and outer framework units, a core material containing cavity is formed between the two, and aerogel composite thermal insulation core material is filled in the cavity; the framework units are combined with inorganic foaming pouring material and bio-based thermal insulation particle mixture to form a bearing and thermal insulation integrated structure; basalt fiber reinforced polyether ether ketone tie members are used to connect the inner and outer frameworks, and heat bridges are effectively inhibited; the application can improve thermal insulation durability, structural synergy and whole life cycle environmental protection performance.

Description

Technical Field

[0001] This utility model relates to the field of green building and energy conservation and environmental protection technology, specifically to a green building environmentally friendly thermal insulation wall. Background Technology

[0002] Prefabricated buildings are buildings assembled on-site from components produced in a factory, and represent a comprehensive embodiment of building industrialization.

[0003] Existing technology discloses a prefabricated wall structure employing an inner and outer keel structure with vacuum insulation panels filling the space between, significantly improving the wall's thermal resistance performance and claiming that its insulation effect is 5–20 times better than traditional materials. However, vacuum insulation panels suffer from problems such as limited lifespan, susceptibility to damage, and high cost. If punctures or seal failures occur during transportation, installation, or use, their insulation performance will drop sharply and repair will be difficult. Furthermore, this structure relies on metal keels to connect the inner and outer panels, which can easily create structural thermal bridges, weakening the overall energy-saving effect.

[0004] Another technology uses corrugated steel wire joists to clamp the main and auxiliary insulation blocks, and pours lightweight concrete on both sides to form a composite wall, achieving integration of insulation and structure. However, it is unclear whether the insulation material used is environmentally friendly and recyclable, and the steel wire joists penetrate the insulation layer, which may still create linear thermal bridges. Furthermore, the significant difference in the coefficients of thermal expansion between lightweight concrete and organic insulation materials makes them prone to interfacial cracking under temperature cycling, affecting the wall's durability and airtightness, and thus reducing long-term insulation performance. The above solutions still have room for improvement in terms of the durability and environmental friendliness of insulation materials, thermal bridge suppression, structural-insulation synergy, and life-cycle sustainability. Utility Model Content

[0005] The purpose of this utility model is to solve the problems mentioned in the background art and to propose a green building environmentally friendly thermal insulation wall.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A green building environmentally friendly thermal insulation wall system, comprising: Inner protective layer; An outer protective layer, which is fixedly connected to the inner protective layer by a non-metallic connecting component; The wall comprises an inner frame unit and an outer frame unit. The inner frame unit is embedded inside the inner protective layer and bonded and cured together with cement-based composite slurry. The outer frame unit is embedded inside the outer protective layer and bonded and cured together with cement-based composite slurry. The inner frame unit and the outer frame unit are arranged at intervals in the wall thickness direction, forming a continuous core material receiving cavity between them. The core material receiving cavity is filled with aerogel composite thermal insulation core material.

[0007] Furthermore, the inner skeleton unit is formed by multiple horizontal ribs and multiple vertical ribs orthogonally overlapping and fixedly connected by snap-fit ​​nodes to form a grid-like frame. Adjacent horizontal ribs and vertical ribs enclose multiple closed first chambers. Inorganic foaming injection material is injected into the first chambers and cured at room temperature to form an inner reinforcing filler. The inner reinforcing filler and the inner protective layer together form a load-bearing inner shell.

[0008] Furthermore, the outer skeleton unit consists of multiple corrugated support ribs arranged side by side in the horizontal direction. Adjacent corrugated support ribs are welded and fixed together by transverse connecting rods. Adjacent corrugated support ribs and transverse connecting rods enclose and form multiple second chambers. The second chambers are filled with bio-based thermal insulation granule mixture, and steam curing is used to make the bio-based thermal insulation granule mixture, the outer skeleton unit, and the outer protective layer form an integrated structure. The bio-based thermal insulation granule mixture is prepared by mixing straw fiber, diatomaceous earth powder, and inorganic gelling agent in a mass ratio of 4:3:3.

[0009] Furthermore, the aerogel composite insulation core material is a composite board formed by alternating layers of flexible silica aerogel felt and basalt fiber mesh cloth and then undergoing hydrophobic modification treatment. Its thermal conductivity is not greater than 0.018 W / (m·K), its combustion performance rating is Class A, and its dimensional change rate is less than 0.3% under temperature cycling from -40℃ to 150℃.

[0010] Furthermore, the non-metallic connecting assembly includes multiple fiber-reinforced composite material tie members. Each tie member has a Z-shaped bending structure, with one end embedded inside the transverse rib of the inner skeleton unit and fixed by epoxy resin anchoring adhesive, and the other end embedded inside the corrugated support rib of the outer skeleton unit and fixed by epoxy resin anchoring adhesive. The middle bending section of the tie member is suspended in the core material receiving cavity, only contacting the surface of the aerogel composite insulation core material without penetrating it. The tie member is made of basalt fiber reinforced polyetheretherketone composite material with a thermal conductivity of 0.25 W / (m·K).

[0011] Furthermore, the wall also includes an edge sealing strip, which is continuously laid along the circumferential edge of the aerogel composite insulation core material. Its cross-section is U-shaped and it is made of EPDM rubber and nano-clay composite. The two flanges of the edge sealing strip cover the ends of the inner skeleton unit and the outer skeleton unit respectively, and are bonded and fixed to the end faces of the inner and outer protective layers by hot melt adhesive.

[0012] Furthermore, the bottom inner surface of the edge sealing strip is provided with continuous tooth-shaped protrusions, which are embedded in the side surface layer of the aerogel composite insulation core material to form a physical interlocking sealing structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, through the triple functional zoning of the inner load-bearing shell, the outer bio-based insulation layer, and the middle high-performance aerogel core material, combined with the all-non-metallic low thermal bridge connection system and edge physical interlocking seal, achieves ultra-high thermal insulation performance while also possessing structural safety, durability, environmental recyclability, and ease of construction. It comprehensively solves the inherent defects of existing prefabricated insulation walls in terms of thermal bridging, cracking, core material failure, and unsustainability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the inner skeleton unit; Figure 3 This is a schematic diagram of the outer skeleton unit; Figure 4 This is a schematic diagram of the structure of a non-metallic connecting component; In the diagram: 1. Inner protective layer; 2. Outer protective layer; 3. Inner skeleton unit; 4. Outer skeleton unit; 5. Aerogel composite insulation core material; 6. Non-metallic connecting component; 7. Core material receiving cavity; 8. Inner reinforcing filler; 9. Bio-based insulation granule mixture; 12. Edge sealing wrapping strip. Detailed Implementation

[0015] 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.

[0016] A detailed implementation method for a green building environmentally friendly thermal insulation wall is provided in conjunction with the accompanying drawings.

[0017] like Figure 1As shown, the wall has a rectangular plate structure and is installed along the building facade. Its thickness, from the inside to the outside, includes an inner protective layer 1, a core material receiving cavity 7, and an outer protective layer 2. Both the inner protective layer 1 and the outer protective layer 2 are thin plate structures cast with cement-based composite slurry, with thicknesses of 30mm and 25mm respectively. The two are mechanically connected by non-metallic connecting components 6 to maintain the overall structural stability of the wall.

[0018] The inner protective layer 1 has an inner skeleton unit 3 embedded inside, which is then wrapped, bonded, and cured with cement-based composite slurry to form an integrated structure. The outer protective layer 2 has an outer skeleton unit 4 embedded inside, which is also wrapped, bonded, and cured with cement-based composite slurry to form an integrated structure. The inner skeleton unit 3 and the outer skeleton unit 4 are arranged at intervals in the wall thickness direction, forming a continuous and through core material receiving cavity 7 between them. This cavity is filled with aerogel composite insulation core material 5.

[0019] The specific structure of the inner skeleton unit 3 is as follows: Figure 2 As shown, a grid-like frame is formed by the orthogonal overlap of multiple horizontal and vertical ribs. Adjacent horizontal and vertical ribs enclose multiple closed first chambers. Both the horizontal and vertical ribs are prefabricated using glass fiber reinforced cement (GRC), with a cross-sectional dimension of 20mm × 15mm. A snap-fit ​​structure is installed at the overlap joints for secure connection. During wall manufacturing, the inner skeleton unit 3 is first placed at the bottom of the mold, followed by the injection of inorganic foaming grout into each first chamber. This inorganic foaming grout is prepared by mixing sulfoaluminate cement, fly ash, foaming agent, and water in a mass ratio of 60:20:2:18. After natural curing at room temperature for 24 hours, it solidifies to form the inner reinforcing filler 8. The inner reinforcing filler 8 completely fills the first chamber and firmly bonds with the inner skeleton unit 3. Together with the inner protective layer 1, it forms a load-bearing inner shell, bearing the main structural loads of the wall during transportation, hoisting, and use.

[0020] The specific structure of the outer skeleton unit 4 is as follows: Figure 3As shown, the structure consists of multiple corrugated support ribs arranged horizontally in parallel. These ribs are made of basalt fiber reinforced polymer pultruded profiles with a sinusoidal cross-section, a wave height of 12mm, and a wave spacing of 50mm. Adjacent corrugated support ribs are welded together by transverse connecting rods, which are 6mm diameter basalt fiber reinforced composite round rods. Welding is achieved using hot melt adhesive bonding. Adjacent corrugated support ribs and transverse connecting rods enclose multiple secondary chambers. During wall manufacturing, a bio-based thermal insulation granule mixture is filled into the secondary chambers. This mixture is made by uniformly mixing straw fiber, diatomaceous earth powder, and an inorganic binder in a mass ratio of 4:3:3. The inorganic binder is a composite system of water glass and metakaolin. After filling, the entire wall is steam-cured at 60℃ and 95% humidity for 12 hours, forming an integrated structure with the bio-based thermal insulation granule mixture 9, the outer skeleton unit 4, and the outer protective layer 2.

[0021] The aerogel composite insulation core material 5, filled within the core material receiving cavity 7, is a composite board formed by alternating layers of flexible silica aerogel felt and basalt fiber mesh cloth, followed by hydrophobic modification. It consists of five layers: three layers of aerogel felt and two layers of basalt fiber mesh cloth, arranged alternately, with a total thickness of 50 mm. The composite board has a thermal conductivity of no more than 0.018 W / (m·K), a fire performance rating of Class A, and a dimensional change rate of less than 0.3% under temperature cycling from -40℃ to 150℃. During wall assembly, the aerogel composite insulation core material 5 is integrally placed into the core material receiving cavity 7, with its upper and lower end faces aligned with the corresponding end faces of the inner frame unit 3 and the outer frame unit 4. Its circumferential edges are sealed by edge sealing strips 12.

[0022] The structure of the non-metallic connecting component 6 is as follows: Figure 4 As shown, the system includes multiple fiber-reinforced composite material tie members, each with a Z-shaped bending structure. These tie members are made of basalt fiber-reinforced polyetheretherketone (PEEK) composite material through compression molding, and have a thermal conductivity of 0.25 W / (m·K). One end of each tie member is embedded 25 mm deep into the transverse ribs of the inner skeleton unit 3 and fixed with epoxy resin anchoring adhesive. The other end is embedded 25 mm deep into the corrugated support ribs of the outer skeleton unit 4 and also fixed with epoxy resin anchoring adhesive. The aerogel composite insulation core material 5 has clearance slots corresponding to the tie member positions, and the Z-shaped bending section is embedded in these clearance slots. This allows the middle bending section to float within the core material receiving cavity 7, contacting only the surface of the aerogel composite insulation core material 5 without penetrating it. This effectively transmits shear force and maintains the integrity of the wall while completely blocking the through-type thermal bridge path from the inner protective layer 1 to the outer protective layer 2.

[0023] The tie rods are distributed in a matrix along the wall plane, with a horizontal spacing of 300mm and a vertical spacing of 400mm, to ensure effective connection and load transfer between the inner and outer protective layers.

[0024] The edge sealing strip 12 is continuously laid along the circumferential edge of the aerogel composite insulation core material 5. Its cross-section is U-shaped and it is made by extrusion molding of a EPDM rubber and nano-clay blended at a mass ratio of 95:5. The two flanges of the edge sealing strip 12 cover the ends of the inner skeleton unit 3 and the outer skeleton unit 4 respectively, with a coverage width of 15mm. It is then bonded and fixed to the end faces of the inner protective layer 1 and the outer protective layer 2 using hot melt adhesive. The bottom inner surface of the edge sealing strip 12 has continuous tooth-like protrusions with a tooth height of 1.2mm and a tooth pitch of 3mm. These tooth-like protrusions are embedded approximately 0.8mm into the side surface layer of the aerogel composite insulation core material 5, forming a physical interlocking sealing structure to prevent moisture penetration along the edge of the core material.

[0025] In the actual manufacturing process, the wall adopts a step-by-step molding process: First, the inner skeleton unit 3 is placed in the bottom mold, and inorganic foaming grout is injected to form the inner reinforcing filler 8. Then, the cement-based composite slurry of the inner protective layer 1 is poured. After the inner structure has initially set, the aerogel composite insulation core material 5 is placed in the predetermined position, and the outer skeleton unit 4 is installed on its outside, filled with bio-based insulation granule mixture 9. Finally, the cement-based composite slurry of the outer protective layer 2 is poured. The non-metallic connecting component 6 is pre-positioned and installed before pouring the inner and outer protective layers, with the middle bending section suspended. The pre-drilled holes on the aerogel core material are fitted into the bending section. The edge sealing wrapping strip 12 is pasted to the circumferential edge with hot melt adhesive after the wall is demolded. The entire wall can be prefabricated in the factory, transported to the construction site, and connected to the main structure. Adjacent walls are spliced ​​together with tongue and groove joints or special connectors to form a complete building envelope system.

[0026] To enable those skilled in the art to fully understand and implement this utility model, the following section, using a typical prefabricated residential building project as an example, elaborates on the operating principle and key technical effects of the green building environmentally friendly thermal insulation wall of this utility model.

[0027] During the factory prefabrication stage, the inner skeleton unit 3 is precisely positioned in the bottom mold. This unit, composed of horizontal and vertical ribs made of GRC material, forms a stable grid frame through self-locking snap-fit ​​nodes. Subsequently, sulfoaluminate cement-based inorganic foamed grout, prepared at a mass ratio of 60:20:2:18, is injected into each of the first chambers. This material undergoes a controlled foaming and hydration reaction at room temperature, forming a lightweight, high-strength inner reinforcing filler 8 within 24 hours. This process not only fills the skeleton cavities but also, through chemical-mechanical interlocking with the GRC ribs, constructs a high-rigidity, impact-resistant load-bearing inner shell. This effectively bears the concentrated loads generated during subsequent transportation and hoisting, avoiding the cracking problem of traditional thin-plate protective layers due to a lack of internal support.

[0028] After the inner structure has initially solidified, the pre-cut aerogel composite insulation core material 5 is placed into the core material receiving cavity 7 formed by the inner skeleton unit 3 and the outer skeleton unit 4. The pre-drilled holes on the aerogel core material are fitted with the bending section. This core material uses three layers of flexible silica aerogel felt and two layers of basalt fiber mesh fabric alternately laminated and treated with hydrophobic modification. Its ultra-low thermal conductivity (≤0.018 W / (m·K)) is due to the restriction of the free path of gas molecules by the nanoporous structure of aerogel, which greatly inhibits heat conduction. The basalt fiber mesh fabric provides tensile reinforcement and dimensional stability, so that its dimensional change rate is less than 0.3% under temperature cycling from -40℃ to 150℃, which fundamentally avoids the risk of interface delamination caused by thermal expansion and contraction of traditional organic insulation materials.

[0029] Subsequently, the outer frame unit 4 is installed on the outside. Its corrugated support ribs are made of basalt fiber reinforced polymer profiles with a sinusoidal cross-section. The design of 12mm wave height and 50mm wave pitch ensures lateral bending stiffness while minimizing material usage and avoiding the formation of continuous linear paths. Adjacent corrugated ribs are bonded together with basalt fiber round rods and transverse connecting rods using hot melt adhesive to form multiple second chambers, which are filled with bio-based thermal insulation granular mixture 9, which is a mixture of straw fiber, diatomaceous earth powder, and water glass-metakaolin inorganic binder in a 4:3:3 ratio. After steam curing at 60℃ and 95% humidity for 12 hours, the inorganic binder system undergoes a pozzolanic reaction and cross-links with silica gel, solidifying the mixture into a lightweight, fire-resistant (Class A), and biodegradable thermal insulation body. This body forms a synergistic load-bearing whole with the outer protective layer 2 and the frame unit 4. At the same time, its coefficient of thermal expansion is closer to that of the cement matrix, significantly reducing the tendency for cracking caused by temperature stress.

[0030] The key lies in the arrangement of the non-metallic connecting component 6. The Z-shaped tie is molded from basalt fiber reinforced PEEK composite material, with a thermal conductivity of only 0.25 W / (m·K), far lower than that of metallic materials (typically >15 W / (m·K)). Its two ends are anchored 25mm deep inside the transverse ribs of the inner skeleton unit 3 and the corrugated support ribs of the outer skeleton unit 4, respectively, and bonded with high strength using epoxy resin. The middle bent section is suspended within the core material receiving cavity 7, only contacting the surface of the aerogel composite insulation core material 5 without penetrating it (i.e., without disrupting the overall continuity). This effectively transmits shear force and maintains the integrity of the wall while completely blocking the through-flow thermal bridge path from the inner protective layer 1 to the outer protective layer 2. The tie components are distributed in a 300mm × 400mm matrix, satisfying structural connection requirements while controlling local thermal bridge effects to a negligible level. The measured overall heat transfer coefficient U of the wall can be reduced to 0.15 W / (m·K). 2 ·K) and below.

[0031] After the wall assembly is completed, the edge sealing strip 12 wraps around the edge of the aerogel composite insulation core material 5 circumferentially. Its U-shaped cross-section flanges cover the ends of the inner and outer skeleton units by 15mm and are bonded to the end face of the protective layer with hot melt adhesive. The continuous toothed protrusions (tooth height 1.2mm, tooth spacing 3mm) on the bottom inner surface are embedded approximately 0.8mm deep into the side of the aerogel felt, forming a microscopic mechanical interlock. This structure not only blocks the capillary penetration of water vapor along the edge of the core material but also compensates for the tiny assembly gaps between different materials, ensuring that airtightness and long-term insulation performance are not degraded due to construction errors.

[0032] All contents not described in detail in this specification are existing technologies known to those skilled in the art, and the proportions of materials and process parameters are not absolutely limited, and can be achieved using conventional equipment and standard operations. The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. 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 green building environmentally friendly thermal insulation wall, characterized in that, include: Inner protective layer; An outer protective layer, which is fixedly connected to the inner protective layer by a non-metallic connecting component; The wall comprises an inner frame unit and an outer frame unit. The inner frame unit is embedded inside the inner protective layer and bonded and cured together with cement-based composite slurry. The outer frame unit is embedded inside the outer protective layer and bonded and cured together with cement-based composite slurry. The inner frame unit and the outer frame unit are arranged at intervals in the wall thickness direction, forming a continuous core material receiving cavity between them. The core material receiving cavity is filled with aerogel composite thermal insulation core material.

2. The green building environmentally friendly thermal insulation wall according to claim 1, characterized in that, The inner skeleton unit is formed by multiple horizontal ribs and multiple vertical ribs orthogonally overlapping and fixedly connected by snap-fit ​​nodes to form a grid-like frame. Adjacent horizontal ribs and vertical ribs enclose multiple closed first chambers. Inorganic foaming injection material is injected into the first chamber and cured at room temperature to form an inner reinforcing filler. The inner reinforcing filler and the inner protective layer together form a load-bearing inner shell.

3. The green building environmentally friendly thermal insulation wall according to claim 1, characterized in that, The aerogel composite insulation core material is a composite board formed by alternating layers of flexible silica aerogel felt and basalt fiber mesh cloth and then undergoing hydrophobic modification treatment. Its thermal conductivity is not greater than 0.018 W / (m·K), its combustion performance rating is Class A, and its dimensional change rate is less than 0.3% under temperature cycling from -40℃ to 150℃.

4. The green building environmentally friendly thermal insulation wall according to claim 1, characterized in that, The non-metallic connecting assembly includes multiple fiber-reinforced composite material tie members. Each tie member has a Z-shaped bending structure, with one end embedded inside the transverse rib of the inner skeleton unit and fixed by epoxy resin anchoring adhesive, and the other end embedded inside the corrugated support rib of the outer skeleton unit and fixed by epoxy resin anchoring adhesive. The middle bending section of the tie member is suspended in the core material receiving cavity, only contacting the surface of the aerogel composite insulation core material without penetrating it. The tie member is made of basalt fiber reinforced polyetheretherketone composite material with a thermal conductivity of 0.25 W / (m·K).

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