Composite external wall insulation structure

Abstract

The application relates to the technical field of wall heat preservation, in particular to an outer wall composite heat preservation structure, which comprises a heat preservation layer, a connecting mechanism and a wall base layer, the connecting mechanism and the heat preservation layer are connected through a non-continuous contact part, at least one closed or semi-closed air cavity is formed between the connecting mechanism and the heat preservation layer and / or in the heat preservation layer, at least one partition is arranged in the air cavity and used for dividing and supporting the air cavity. The non-continuous contact part directly reduces the physical contact area between the connecting mechanism and the heat preservation layer, weakens the heat conduction and sound vibration conduction paths from the source, and lays a structural foundation for reducing the heat bridge and sound bridge effects. Secondly, the formed air cavity has low thermal conductivity and can effectively block heat flow, thereby achieving the effects of heat insulation and sound insulation; the partition in the air cavity plays a role of supporting the air cavity structure and preventing the air cavity from collapsing in the pressure receiving or installation process, and the stability of the whole structure is enhanced.

Description

Technical Field

[0001] This application relates to the technical field of wall insulation, and in particular to a composite insulation structure for exterior walls. Background Technology

[0002] With increasingly stringent energy-saving requirements for buildings, external wall insulation systems have become an important component of modern architecture. Traditional external wall insulation structures typically use adhesive or mechanical fastening methods to fix the insulation layer to the wall substrate. Mechanical fastening often relies on metal connection mechanisms (such as anchors and joists) to connect the insulation layer to the wall. While this type of structure ensures the stability of the insulation layer, the direct penetration or close contact between the metal connection mechanisms and the insulation layer can easily create thermal bridges, leading to heat loss and reducing the overall insulation effect. Furthermore, metal components can also cause condensation, corrosion, and structural durability issues.

[0003] Chinese patent CN211007104U discloses a waterproof and reinforced exterior wall insulation structure, comprising a leveling layer, an insulation layer composed of several insulation boards, and an adhesive layer. The structure is characterized by the presence of a first reinforcing strip and a second reinforcing strip between horizontally and vertically adjacent insulation boards. The ends of the reinforcing strips are inserted into the adjacent insulation boards to achieve a mechanical connection. The second reinforcing strip is further fixed to the exterior wall base layer by expansion bolts to provide additional anchoring. This is a typical approach in the prior art to improve the overall integrity and durability of the insulation system by strengthening the connection between boards and sealing the insulation.

[0004] However, despite improvements in structural reinforcement and waterproofing of panel joints, the following inherent defects remain: First, the reinforcing strips (usually aluminum strips) and expansion bolts used are all made of highly thermally conductive metals, forming direct, large-area insert-type or surface contact with the insulation board, creating significant thermal and sound bridges and severely weakening the overall thermal and sound insulation performance of the wall. Second, the structure lacks effective thermal or sound insulation barriers between the connection mechanism and the insulation layer, allowing heat and sound to be easily conducted through the continuous metal path. Summary of the Invention

[0005] This application provides an external wall composite insulation structure that can at least partially solve the above-mentioned technical problems.

[0006] Firstly, this application provides an external wall composite insulation structure, which adopts the following technical solution:

[0007] An external wall composite thermal insulation structure includes an insulation layer, a connecting mechanism, and a wall base layer. The connecting mechanism is connected to the insulation layer through a discontinuous contact portion, thereby forming at least one closed or semi-closed air cavity between the connecting mechanism and the insulation layer and / or inside the insulation layer. At least one partition is provided inside the air cavity for dividing and supporting the air cavity.

[0008] By adopting the above technical solution, the connecting mechanism and the insulation layer are assembled, and at least one closed or semi-closed cavity is intentionally formed at the interface between the connecting mechanism and the insulation layer, or inside the composite structure of the insulation layer itself.

[0009] First, the discontinuous contact area directly reduces the physical contact area between the connecting mechanism and the insulation layer, weakening the paths of heat conduction and sound vibration transmission at the source, thus laying a structural foundation for reducing thermal and acoustic bridging effects. Second, the formed air cavity itself has low thermal conductivity, effectively blocking heat flow and providing both heat and sound insulation. The partitions within the air cavity support the structure and prevent it from collapsing under pressure or during installation, enhancing the overall stability of the structure. This solves the problems of severe heat and sound transfer caused by large-area contact between connecting components and the insulation layer in existing technologies, as well as the instability and susceptibility to failure of simple cavity structures.

[0010] Optionally, the partition is provided with a plurality of air holes.

[0011] By adopting the above technical solution, the existing air-cavity structure with partitions has several air holes in the partitions to balance the air pressure between the inside of the air cavity and the external environment. When the temperature or altitude changes, the air pressure inside and outside the air cavity may become unbalanced, causing the insulation layer or surface layer to bulge or deform inward. The air holes provide a slow pressure difference balancing channel, which can effectively release this stress, thereby protecting the insulation structure from damage and improving its durability and dimensional stability; at the same time, it can effectively connect multiple air cavities, disperse heat, slow down heat transfer, and also play a role in sound insulation.

[0012] Optionally, the insulation layer is a composite structure, including an inner insulation board, a frame support, and an outer insulation board, and the air cavity is formed on the frame support between the inner insulation board and the outer insulation board.

[0013] By adopting the above technical solution, the insulation layer is constructed as a sandwich structure consisting of an inner insulation board, a frame support, and an outer insulation board stacked from top to bottom (or from inside to outside). The frame support, as the middle layer, naturally forms regular air cavities between the inner and outer insulation boards due to its own structure (such as having columns or grids). The abstract air cavities are concretized into a standardized sandwich structure that can be industrially produced. The frame support not only serves as the physical spacer and main body for forming the air cavities, but also uniformly transfers and disperses the surface load. Compared with a single-layer insulation board, this composite structure utilizes the optimized combination of a static air layer and solid insulation materials to significantly improve the overall thermal inertia and thermal insulation performance.

[0014] Optionally, a support layer is installed on the contact side between the insulation layer and the wall base layer, the support layer enabling the insulation layer to make multi-point or line contact with the wall base layer.

[0015] By adopting the above technical solution, a support layer is added to the composite insulation layer. During implementation, the support layer is attached between the insulation layer (specifically the inner insulation board) and the wall base. Its surface is designed to be concave-convex, strip-shaped or other non-planar, so that the insulation layer ultimately contacts the wall base only through multiple discrete points or lines.

[0016] This solution achieves flexible or reduced contact between the insulation layer and the main building structure. Compared to traditional full adhesion or large-area support, multi-point or line contact significantly reduces the rigid contact area between the insulation layer and the wall substrate. This further cuts off the path of vibration and some heat flow directly transmitted through the wall substrate, contributing additionally to improved sound insulation and thermal insulation performance. At the same time, it also provides room for fine-tuning in case of structural deformation or thermal expansion and contraction.

[0017] Optionally, the connection mechanism includes a base anchor, a surface connector, a first connecting part, a second connecting part, and an elastic spacer. The base anchor is disposed on the wall base, and the surface connector is connected to the base anchor. The first connecting part is disposed on the surface connector, and the second connecting part is disposed on the insulation layer. A slot is formed on the upper end face of the first connecting part, and a snap-fit ​​block is formed on the second connecting part to engage with the slot. The snap-fit ​​block is inserted into the slot in a vertical direction. The spacer is disposed between the contact surfaces of the first connecting part and the second connecting part.

[0018] By adopting the above technical solution, firstly, the base anchor (such as expansion bolts) is fixed to the wall base. Then, the surface layer connector (such as a metal piece with a slot) is installed in conjunction with the anchor. During installation, the second connection part (i.e., the snap-fit ​​block) on the insulation layer is aligned vertically with the first connection part (i.e., the slot) on the surface layer connector and inserted. A key step is to add an elastic spacer between the contact surfaces of the snap-fit ​​block and the slot.

[0019] The interlocking of the slots and locking blocks provides a clear and secure mechanical lock, bearing the main suspension load of the insulation layer. The elastic spacer is the core component; it physically isolates the metal locking blocks from direct contact with the metal slots, utilizing the low thermal conductivity of the elastic material to block metal thermal bridges. Simultaneously, its elastic properties absorb and dampen vibrations from the wall or external environment, significantly reducing solid-borne sound transmission. The vertical insertion method facilitates construction positioning and rapid installation.

[0020] Optionally, it also includes a partition mechanism, which includes a stop locking rod and a locking block. A corresponding locking hole is provided on the insulation layer, and a clamping groove communicating with the slot is provided on the first connecting part. The stop locking rod slides and rotates in the locking hole, and slides into the clamping groove and abuts against the snap-fit ​​block. The locking block is disposed on the stop locking rod and moves into the slot with the stop locking rod, and is located on the side of the snap-fit ​​block and the slot away from the wall base layer, so that the insulation layer abuts against the wall base layer.

[0021] By adopting the above technical solution, during implementation, after the snap-fit ​​block of the insulation layer is inserted into the slot, the operator slides the stop locking rod horizontally from the locking hole on the side of the insulation layer into the abutment groove of the surface connector until it abuts against the side wall of the snap-fit ​​block; then, the stop locking rod is rotated so that the locking block on it rotates to a horizontal state and is locked on the side of the snap-fit ​​block away from the wall base.

[0022] Simple plugging may pose a risk of dislodgement under certain extreme conditions. The stop lock provides horizontal restraint, while the rotated locking block forms a mechanical stop in the horizontal direction and drives the insulation layer to press against the support layer. This effectively prevents the locking block from accidentally coming out of the slot due to external force or vibration, greatly enhancing the safety of the connection node and its resistance to negative wind pressure, and also increasing the stability of the connection.

[0023] Optionally, the partition mechanism further includes an expansion layer that fills the slot, locking hole, and abutment groove.

[0024] By employing the above technical solution, an expansion layer material (such as expanded polyurethane sealant) is injected or filled into the gaps of the assembled slots, locking holes, and clamping grooves. After the expansion layer is filled, it first seals the gaps between all mechanical parts, preventing air convection and moisture infiltration, thus improving airtightness and watertightness. Secondly, the expanded and cured material can wrap and fix parts such as locking rods, locking blocks, and snap-fit ​​blocks, eliminating any shaking that may be caused by machining tolerances, making the entire locking mechanism a whole, and further improving the rigidity and durability of the connection.

[0025] Optionally, a spacer is also provided on the insulation layer, and the spacer is fitted onto the surface layer connector.

[0026] By employing the above technical solutions, cold / thermal bridges and acoustic bridges at the through-sections are addressed. Even with resilient spacers, the metal surface layer connector itself remains exposed to the air cavity or environment. A spacer (typically made of low thermal conductivity plastic or rubber) encases the metal component, increasing thermal resistance along the heat flow path and providing additional vibration damping. This reduces heat and sound conducted through the connector itself, effectively complementing and reinforcing the isolation effect of the resilient spacer.

[0027] Optionally, the outer insulation plate is provided with a plurality of pressure-flattening holes, which extend into the air cavity and are sealed by an expansion membrane.

[0028] By adopting the above technical solution, multiple flat pressure holes are drilled or pre-formed from the outer surface to the inner surface of the outer insulation board, and an expansion film is pasted on the inner side of the holes.

[0029] Under the action of external negative wind pressure, the outer insulation panel is at risk of being sucked outward; the expansion film inside the pressure relief hole expands towards the pressure relief hole, reducing the force on the outer insulation panel, effectively preventing it from peeling or falling off, and enhancing the safety of the exterior finish; at the same time, when the internal gas contracts, the expansion film expands away from the pressure relief hole, reducing the internal pressure difference and thus reducing deformation.

[0030] Optionally, the flat pressure hole is opened at an angle downwards at the end away from the expansion head.

[0031] By adopting the above technical solution, the outer opening end of the pressure hole is designed to slope downwards; the downward-sloping channel follows the drainage principle in waterproof design. Even if a small amount of water enters the pressure hole, it will flow downwards along the hole wall under the action of gravity, making it difficult to accumulate or continue to seep inwards, thereby improving the waterproof reliability of the exterior wall system under severe weather conditions.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. The discontinuous contact section directly reduces the physical contact area between the connecting mechanism and the insulation layer, weakening the paths of heat conduction and sound vibration transmission at the source, thus laying a structural foundation for reducing thermal and acoustic bridging effects. Secondly, the formed air cavity itself has low thermal conductivity, effectively blocking heat flow and providing both heat and sound insulation. The partitions within the air cavity support the structure and prevent it from collapsing under pressure or during installation, enhancing the overall stability of the structure. This solves the problems of severe heat and sound transfer caused by large-area contact between connecting components and the insulation layer in existing technologies, as well as the instability and susceptibility to failure of simple cavity structures.

[0034] 2. Addressing cold / thermal bridges and acoustic bridges at the penetration points. Even with resilient spacers, the metal surface connector itself remains exposed to the air cavity or environment. A spacer (typically made of low thermal conductivity plastic or rubber) encases this metal component, increasing thermal resistance along the heat flow path and providing additional vibration damping. This reduces heat and sound conducted through the connector itself, effectively complementing and reinforcing the insulating effect of the resilient spacer.

[0035] 3. There is a risk that the outer insulation board may be sucked outward; the expansion film inside the pressure hole expands towards the pressure hole, reducing the force on the outer insulation board and effectively preventing it from peeling or falling off, thus enhancing the safety of the exterior finish; at the same time, when the internal gas contracts, the expansion film expands away from the pressure hole, reducing the internal pressure difference and thus preventing deformation. Attached Figure Description

[0036] Figure 1 This is a diagram illustrating a single-block structure of the thermal insulation structure in an embodiment of this application;

[0037] Figure 2 This is a perspective view of the thermal insulation structure in the embodiments of this application;

[0038] Figure 3 This is a diagram illustrating the air cavity in an embodiment of this application;

[0039] Figure 4 This is a diagram illustrating the connecting mechanism in an embodiment of this application;

[0040] Figure 5 This is a cross-sectional view of the first connecting portion in an embodiment of this application;

[0041] Figure 6 This is an exploded view of the stop lock rod and the second connecting part in the embodiment of this application.

[0042] Reference numerals: 100, insulation layer; 110, inner insulation board; 111, locking hole; 120, frame support; 130, outer insulation board; 131, flat pressure hole; 140, expansion membrane; 151, air cavity; 152, partition; 200, connecting mechanism; 210, base anchor; 220, surface layer connector; 230, first connecting part; 231, slot; 232, clamping groove; 240, second connecting part; 241, snap-fit ​​block; 250, elastic spacer; 260, spacer sleeve; 300, wall base layer; 400, support layer; 500, partition mechanism; 510, stop locking rod; 520, locking block; 521, filling groove; 530, fixing sleeve; 531, stop groove; 540, locking pin. Detailed Implementation

[0043] The following combination Figures 1 to 6 This application will be described in further detail.

[0044] This embodiment provides an external wall composite insulation structure, the core of which is to achieve a non-continuous contact connection between the insulation layer 100 and the wall base layer 300 through a set of ingenious connection mechanisms 200, and to collaboratively construct an air cavity 151 structure with internal support partitions 152 during the process, thereby systematically solving the problems of thermal bridges, sound bridges and connection reliability existing in traditional insulation structures.

[0045] Reference Figures 1 to 6 The external wall composite insulation structure mainly consists of a wall base layer 300, a support layer 400, a composite insulation layer 100, and a connecting mechanism 200. Its usage process is as follows: First, the connecting mechanism 200 is fixed to the wall base layer 300; then, the composite insulation layer 100 is initially positioned using the support layer 400; next, the insulation layer 100 is connected to the wall base layer 300 via the connecting mechanism 200. The entire connection process achieves a stable connection between the insulation layer 100 and the base layer, while simultaneously, through multi-point elastic support, intermittent contact, and the formation of an internal air cavity 151, it maximizes the blocking of heat and sound conduction paths.

[0046] The wall base 300 is the main structure of the building's exterior wall, such as a concrete wall or masonry wall. A support layer 400 is fixed to the surface of this wall base 300 by adhesive or mechanical means. In this embodiment, the support layer 400 is fixed to the wall base 300 by a connecting mechanism 200. The support layer 400 is a continuous plane with an interlaced grid structure and corresponding mounting grooves. The connecting mechanism 200 is disposed within the mounting grooves and passes through the support layer 400 to press it firmly against the wall base 300. The support layer 400 also forms an initial air gap with the wall base 300, providing sound and heat insulation.

[0047] The support layer 400 abuts against the inner surface of the composite insulation layer 100 and can be bonded and fixed during installation by applying an adhesive material, such as a polymer cement-based adhesive. The unique surface morphology of the support layer 400 ensures that, after installation, the entire inner surface of the composite insulation layer 100 does not directly contact the wall base layer 300, but only through the tips of discretely distributed protrusions or ridges on the support layer 400. This design constitutes the first reduced-contact barrier between the insulation system and the building structure, transforming traditional surface contact into limited multi-point or line contact, significantly reducing the rigid contact area and providing a basis for cutting off vibration transmission and some heat flow.

[0048] The composite insulation layer 100 is mainly used to achieve thermal insulation functions. From the inside to the outside, it includes an inner insulation board 110, a frame support 120, and an outer insulation board 130. The inner insulation board 110 is installed close to the aforementioned support layer 400. The frame support 120 is located between the inner insulation board 110 and the outer insulation board 130. It is not a solid material, but a skeleton layer with a regular three-dimensional spatial structure. For example, in this embodiment, the skeleton layer can be composed of a grid of crisscrossing ribs, or it can be composed of an array of uniformly distributed columnar supports. The two ends of these ribs or supports are connected to the inner surfaces of the inner insulation board 110 and the outer insulation board 130, respectively. The inner insulation board 110 and the outer insulation board 130 are coated with adhesive material and have positioning grooves on the side closest to the frame support 120. The adhesive material can be a polymer cement-based adhesive, an epoxy resin adhesive, or a phenolic-rubber adhesive. The edge of the frame support 120 forms protrusions that insert into the positioning grooves. Thus, between the two insulation boards, the structure of the frame support 120 naturally creates a large number of closed or semi-closed regular cavities, which serve as sound and heat insulation air chambers 151.

[0049] In other embodiments, the positioning groove and corresponding protrusion may not be provided, and the composite may be directly achieved by pressing or adhesive pressing.

[0050] The partitions 152 (i.e. the ribs or columns of the frame support 120) in the air cavity 151 not only serve to divide the large cavity and suppress air convection heat transfer, but more importantly, they act as miniature columns, rigidly supporting the space between the inner and outer insulation boards. This ensures the stability and flatness of the entire composite insulation layer 100 when subjected to external pressure or installation loads, preventing the insulation boards from collapsing inward or sticking together, which could lead to the failure of the air cavity 151.

[0051] In other embodiments, tiny vents may be provided on these partitions 152 to balance the slight air pressure difference between different air chambers 151, avoid bulging stress caused by temperature changes, and these micro-pores can further interfere with the propagation of sound waves.

[0052] The outer insulation panel 130 serves as the outermost protective and insulating layer 100, and its outer surface will eventually be covered with a decorative coating or veneer. To further enhance the bonding force between the outer insulation panel 130 and the internal frame support 120 and to resist the suction force of external negative wind pressure, multiple pressure-flattening holes 131 are provided on the outer insulation panel 130. These pressure-flattening holes 131 extend inward from the outer surface, penetrate the outer insulation panel 130, and extend into the internal air cavity 151 area. An expansion membrane 140 is adhered to the side wall of the outer insulation board 130 near the frame support 120. The expansion membrane 140 is a thermally expandable microsphere breathable membrane or a water-swellable waterproof membrane. The expansion membrane 140 is installed between the frame support 120 and the outer insulation board 130 by adhesive bonding. The expansion membrane 140 can expand under pressure, forming a flat pressure sealing structure with the flat pressure hole 131. When the pressure inside the air cavity 151 changes, the expansion membrane 140 can expand into the flat pressure hole 131 or expand in the opposite direction to flat pressure, and the expansion membrane 140 can reduce the entry of external moisture into the interior. Preferably, the outer opening end of the flat pressure hole 131 is designed to be inclined downward, forming a waterproof structure, so that moisture that accidentally enters the hole can be naturally discharged under the action of gravity, making it difficult to penetrate into the interior of the insulation layer 100.

[0053] In other embodiments, a rubber tube can be attached inside the flat pressure hole 131, and an expansion head is provided at the end of the rubber tube. The expansion head is located inside the air cavity 151. When air is introduced into the hole, the expansion head will expand inside the air cavity 151.

[0054] The connecting mechanism 200 mainly includes a base anchor 210, a surface connector 220, and an elastic spacer 250. The base anchor 210 can be a pre-installed anchor rod or a temporarily drilled expansion bolt, such as the expansion bolt used in this embodiment, which is pre-anchored in the wall base 300. The surface connector 220 is installed on the outer end of the base anchor 210 by means of a threaded connection with the base anchor 210. The surface connector 220 is provided with a first connecting part 230. The main body of the first connecting part 230 is generally block-shaped or plate-shaped. In this embodiment, it is preferably a block structure. The block structure is installed in the groove of the support layer 400, and the support layer 400 is attached and fixed to the wall base 300 by the surface connector 220. The first connecting part 230 has an upward-facing slot 231 at its upward end (towards the insulation layer 100). On the inner insulation board 110 of the composite insulation layer 100, or on an accessory integrated thereon, a downwardly protruding snap-fit ​​block 241 is provided, which constitutes the second connecting part 240. During installation, the operator positions the insulation layer 100 as a whole, aligns the snap-fit ​​block 241 with the slot 231 on the surface connector 220, and then lowers it vertically to embed the snap-fit ​​block 241 into the slot 231, thereby achieving the initial suspension and load-bearing of the insulation layer 100.

[0055] To ensure reliable connection and prevent thermal and acoustic bridging, an elastic spacer 250 is pre-placed or filled between the metal contact surfaces of the snap-fit ​​block 241 and the slot 231. This elastic spacer 250 is made of rubber, silicone, or other elastic materials with low thermal conductivity and high damping. It acts like a gasket, physically isolating the upper and lower metal parts from direct contact. On one hand, its low thermal conductivity significantly increases the resistance to heat flow through this connection point, cutting off the metal thermal bridge; on the other hand, its elastic properties can absorb and dissipate structural vibration energy from the wall or insulation layer 100, effectively suppressing solid-borne sound transmission.

[0056] To further secure the insulation layer 100 and prevent it from dislodging from the slot 231 under long-term wind vibration or accidental impact, a partition mechanism 500 is also provided. This mechanism mainly includes a stop locking rod 510 and a locking block 520 fixed on the locking rod. The locking block 520 is semi-circular with chamfered edges to facilitate rotation within the slot 231. A fixing sleeve 530 is fixedly installed on the frame support 120. The fixing sleeve 530, the inner insulation plate 110, and the outer insulation plate share a horizontally formed locking hole 111 adjacent to the snap-fit ​​block 241. The locking hole 111 is cylindrical and fits the outer diameter of the locking block 520. On the surface layer connector 220, a horizontal abutment groove 232 is formed, communicating with the side wall of the slot 231. The locking block 520 can slide into the slot 231 from the locking hole 111 through the abutment groove.

[0057] After the locking block 241 is inserted into the slot 231, the stop locking rod 510 is pushed horizontally inward from the locking hole 111 on the side of the insulation layer 100. After the front end of the locking rod passes through the locking hole 111, it continues to slide into the abutment groove 232 of the surface layer connector 220 until its front end is in close contact with the side of the locking block 241, which provides horizontal limitation. Then, the stop locking rod 510 is rotated (e.g., rotated 90 degrees), and the locking block 520 on it rotates accordingly. The shape of the locking block 520 is designed so that when it is rotated to a certain angle, it can enter the side of the locking block 241 away from the elastic spacer 250 and be located on the side of the locking block 241, forming a mechanical stop. Multiple filling grooves 521 are formed on the contact surface between the locking block 520 and the locking block 241, and the filling grooves 521 can be filled with expansion material. In this way, the latching block 241 is blocked by the locking block 520 in the vertical direction and cannot be ejected from the slot 231, thus achieving a second reliable mechanical locking.

[0058] Furthermore, in other embodiments, in order to facilitate the fixing of the stop lock rod 510, a stop groove 531 is provided at the end of the stop lock rod 510 and the fixing sleeve 530 away from the locking block 520, and a locking pin 540 is installed in the stop groove 531.

[0059] To improve the sealing, integrity, and durability of this joint, after the aforementioned mechanical locking is completed, an expandable sealing material such as polyurethane foam can be injected into the slot 231 gaps, locking holes 111, and abutment grooves 232 around the locking block 241 to form an expansion layer. This material flows and fills all gaps before curing, and expands and tightens after curing, encapsulating the metal components into a single unit. This not only eliminates play gaps and enhances rigidity but also completely seals the connection joint, preventing air penetration and moisture intrusion.

[0060] Finally, to address the localized thermal and acoustic bridges that may form when the surface layer connector 220 rod penetrates the insulation layer 100 (or is exposed in the air cavity 151), a cylindrical spacer 260 made of low thermal conductivity plastic (such as nylon, PVC) or rubber is fitted over the surface layer connector 220 at the point where the surface layer connector 220 penetrates the insulation layer 100. This spacer 260 is fitted onto the surface layer connector 220 as the insulation layer 100 approaches the wall base layer 300. The spacer 260 tightly wraps around the connector rod, increasing the thermal resistance along the heat transfer path and providing additional vibration damping, effectively complementing and reinforcing the effect of the elastic spacer 250 in isolating 152.

[0061] In this embodiment, the surface of the support layer 400 is preferably a uniformly distributed array of hemispherical protrusions; the frame support 120 is an injection-molded plastic mesh skeleton; the elastic spacer 250 is made of silicone; and the spacer sleeve 260 is a PVC sleeve.

[0062] The application process of the exterior wall composite insulation structure in this embodiment is a standardized assembly process from the structural base layer to the functional surface layer, from initial positioning to final locking. First, the support layer 400 establishes a minimal contact mode between the insulation layer 100 and the base layer; second, the insertion and elastic spacing achieve load-bearing and initial isolation 152; then, the sliding and rotating locking rod achieves mechanical redundancy locking; subsequently, the injection of expansion material achieves sealing and overall curing; finally, the addition of a spacer 260 achieves reinforced isolation 152 at the penetration points.

[0063] In terms of thermal insulation, the system constructs a multi-layered, three-dimensional thermal bridge blocking system through point-to-line contact of the support layer 400, elastic spacing of the connecting nodes and wrapping with the spacer 260, and a sealed air cavity 151 supported by the partition 152 inside the composite insulation layer 100, significantly reducing the overall heat transfer coefficient of the system. Regarding sound insulation and noise reduction, the elastic spacer 250 and the spacer 260 effectively dampen solid-borne sound vibrations, while the air cavity 151 and the microporous partition 152 absorb some airborne sound, improving overall sound insulation performance. In terms of structural safety, the double composite mechanical connection and the flat pressure hole 131 jointly ensure the adhesion safety of the insulation layer 100 under various loads, exhibiting outstanding wind pressure resistance and pull-out resistance. Regarding durability and waterproofing, the sealing of the expansion layer and the drainage design of the inclined flat pressure hole 131 enhance the system's airtightness, watertightness, and resistance to weathering.

[0064] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An external wall composite thermal insulation structure, comprising an insulation layer (100), a connecting mechanism (200), and a wall base layer (300), characterized in that: The connecting mechanism (200) is connected to the insulation layer (100) through a non-continuous contact portion, such that at least one closed or semi-closed air cavity (151) is formed between the connecting mechanism (200) and the insulation layer (100) and / or inside the insulation layer (100). At least one partition (152) is provided inside the air cavity (151) for dividing and supporting the air cavity (151). The connecting mechanism (200) includes a base anchor (210), a surface connector (220), a first connecting part (230), a second connecting part (240), and an elastic spacer (250). The base anchor (210) is disposed on the wall base (300), and the surface connector (220) is connected to the base anchor (210). The first connecting part (230) is disposed on the surface connector (220), and the second connecting part (240) is disposed on the insulation layer (100). A slot (231) is formed on the upper end face of the first connecting part (230), and a snap-fit ​​block (241) is formed on the second connecting part (240) to cooperate with the slot (231). The snap-fit ​​block (241) is inserted into the slot (231) in a vertical direction. The elastic spacer (250) is disposed between the contact surfaces of the first connecting part (230) and the second connecting part (240). It also includes a partition mechanism (500), which includes a stop locking rod (510) and a locking block (520). A corresponding locking hole (111) is provided on the insulation layer (100), and a clamping groove (232) communicating with the slot (231) is provided on the first connecting part (230). The stop locking rod (510) slides and rotates in the locking hole (111). The material is moved into the abutment groove (232) and abuts against the snap-fit ​​block (241); the locking block (520) is disposed on the stop lock rod (510) and moves into the slot (231) as the stop lock rod (510) rotates, and is located on the side of the snap-fit ​​block (241) and the slot (231) away from the wall base (300), so that the insulation layer (100) abuts against the wall base (300).

2. The composite thermal insulation structure for exterior walls according to claim 1, characterized in that: The partition (152) has several air holes.

3. The composite thermal insulation structure for exterior walls according to claim 2, characterized in that: The insulation layer (100) is a composite structure, including an inner insulation board (110), a frame support (120) and an outer insulation board (130). The air cavity (151) is formed on the frame support (120) between the inner insulation board (110) and the outer insulation board (130).

4. The composite thermal insulation structure for exterior walls according to claim 3, characterized in that: A support layer (400) is installed on the contact side between the insulation layer (100) and the wall base layer (300), and the support layer (400) enables the insulation layer (100) and the wall base layer (300) to have multi-point contact or line contact.

5. The composite thermal insulation structure for exterior walls according to claim 1, characterized in that: The partition mechanism (500) also includes an expansion layer that fills the slot (231), the locking hole (111) and the abutment groove (232).

6. The composite thermal insulation structure for exterior walls according to claim 1, characterized in that: A spacer (260) is also provided on the insulation layer (100), and the spacer (260) is fitted on the surface layer connector (220).

7. The composite thermal insulation structure for exterior walls according to claim 4, characterized in that: The outer insulation board (130) has multiple flat pressure holes (131) that extend into the air cavity (151) and an expansion film (140) is attached to the inside of the flat pressure hole (131).

8. The composite thermal insulation structure for exterior walls according to claim 7, characterized in that: The flat pressure hole (131) is opened at an angle downwards at the end away from the wall base (300).

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