An external wall insulation system

Abstract

This utility model provides an external wall insulation system, belonging to the technical field of external wall insulation layers. The technical solution includes: an adhesive layer installed on the base wall, an insulation layer outside the adhesive layer, and a protective layer outside the insulation layer; the insulation layer is an HN microplastic board; the protective layer includes a fireproof leveling layer, a plastering layer, and a finishing layer; the plastering layer includes an interface agent, plastering mortar, and fiberglass mesh. The beneficial effects of this utility model are: for external wall insulation systems using HN microplastic boards, graphene is used to modify traditional extruded polystyrene boards, upgrading the production formula, production process, and production equipment, resulting in superior insulation performance. It meets the insulation performance requirements of Shandong Province's new building energy conservation standards, and its overall performance is superior to current traditional insulation systems. Furthermore, the snap-fit ​​connection method avoids the problem of poor insulation performance caused by poor sealing at the joints between boards.

Description

Technical Field

[0001] This utility model relates to the technical field of external wall insulation layer, and more particularly to an external wall insulation system. Background Technology

[0002] Currently, external wall insulation structures are composed of polymer mortar, fiberglass mesh, flame-retardant molded polystyrene foam board, or extruded polystyrene board, integrating insulation, waterproofing, and finishing functions. However, the insulation effect and fire resistance of this structure are no longer ideal for the needs of modern society.

[0003] In addition, the insulation panels are directly spliced ​​during construction, and the joints are sealed after construction is completed, which will cause poor insulation effect.

[0004] Based on the above reasons, an external wall insulation system was designed and developed. Utility Model Content

[0005] The purpose of this utility model is to provide an external wall insulation system that improves thermal insulation performance.

[0006] This utility model is achieved through the following measures:

[0007] An external wall insulation system is characterized by comprising an adhesive layer installed on a base wall, an insulation layer disposed outside the adhesive layer, and a protective layer disposed outside the insulation layer. As one embodiment, the adhesive layer is specifically an adhesive mortar, mainly composed of cement-based cementitious materials, polymer materials, fillers, and additives, which is the adhesive material for bonding thermosetting boards to the base wall.

[0008] The insulation layer is an HN microplastic board. As one embodiment, the HN microplastic board is a polymer rigid foam composite plastic insulation layer made by mixing various high-molecular polymers, modified nano-graphite particles and additives, mixing at high temperature and high pressure, adjusting at low temperature, injecting a composite foaming agent fluid containing supercritical carbon dioxide under high pressure, and releasing and pressing at low temperature and high pressure.

[0009] The protective layer includes a fireproof leveling layer, a plastering layer, and a finishing layer. The fireproof leveling layer is a 10mm composite thermal insulation mortar. The composite thermal insulation mortar is a thermal insulation mortar composed of a redispersible adhesive powder, inorganic cementitious materials, additives, etc., and vitrified microspheres or polystyrene particles as aggregates. It is used as a composite mortar layer between the wall insulation layer and the board joint.

[0010] The finishing layer includes an interface agent, a finishing mortar, and a fiberglass mesh. The interface agent is a special interface agent with strong polarity, applied to the surface of the composite plastic microbubble board, and is an emulsion-like polymer material used to improve the bonding strength between the insulation layer and the bonding mortar and finishing mortar. The finishing mortar is a polymer mortar with good deformation resistance and bonding performance, formulated mainly by polymer, cement, and sand. The fiberglass mesh is an alkali-resistant fiberglass mesh with a surface treated with a polymer material, and is a reinforcing crack-resistant material embedded in the crack-resistant mortar, referred to as fiberglass mesh. In addition, several anchors are provided on the insulation layer for mechanically fixing the insulation layer to the base wall.

[0011] The specific features of this utility model also include:

[0012] The upper inner side of the insulation layer facing the base wall has a horizontal upper locking groove, and the lower outer side of the insulation layer has a horizontal lower locking groove. Two adjacent insulation layers are locked together by the upper locking groove and the lower locking groove.

[0013] A vertical left snap-fit ​​groove is provided on the left side of the outer side of the insulation layer, and a vertical right snap-fit ​​groove is provided on the right side of the inner side of the insulation layer. Two adjacent insulation layers are snapped together by the left snap-fit ​​groove and the right snap-fit ​​groove. In addition, the upper snap-fit ​​groove and the lower snap-fit ​​groove and other related components can be cut off at the edge of the wall to adapt to the installation structure requirements of the wall.

[0014] A left groove is provided on the bottom surface of the left snap-fit ​​groove that is parallel to the base wall, and a lower groove is provided on the bottom surface of the lower snap-fit ​​groove that is parallel to the base wall. The left groove and the lower groove are where sealant is applied.

[0015] An upper insert plate is provided on the upper end face of the insulation layer near the upper snap-fit ​​groove, and a lower slot is provided on the side of the lower snap-fit ​​groove that is perpendicular to the base wall to cooperate with the upper insert plate. The upper insert plate is located in the lower slot.

[0016] A right insert plate is provided on the right end face of the insulation layer near the right snap-fit ​​groove. A left slot is provided on the side of the left snap-fit ​​groove that is perpendicular to the base wall, and the right insert plate is located in the left slot.

[0017] Paper tape is provided in both the left and lower grooves. One side of the paper tape is adhered to the left or lower groove, and the paper tape has sealant applied along the left or lower groove. After the paper tape wraps the sealant and covers the corresponding left or lower slot, the other side is adhered to the inner surface of the left or lower snap-fit ​​groove. When the corresponding upper or right insert plate is inserted into the corresponding lower or left slot, the paper tape is carried into the interior, and the sealant is squeezed out, thereby sealing the joint between two adjacent insulation layers. The paper tape provides temporary wrapping and support for the sealant, so it can be applied in advance before installing the insulation layer. After installation, the sealant is squeezed out, achieving a better sealing effect and avoiding the drawbacks of applying sealant later, such as the sealant not being able to penetrate into the interior, resulting in poor sealing and poor insulation. After all insulation layers are installed, sealant is applied to the external joints.

[0018] The upper slot has several upper elongated grooves on its side parallel to the base wall. The upper elongated grooves cooperate with the lower groove. When the upper insert plate is inserted into the corresponding lower slot, the sealant in the lower groove comes into contact with the upper elongated grooves and solidifies to achieve a further sealing effect.

[0019] The right snap-fit ​​groove has several right elongated grooves on its side parallel to the base wall, which mate with the left groove. When the right insert plate is inserted into the corresponding left slot, the sealant in the left groove comes into contact with the several right elongated grooves and solidifies to achieve a further sealing effect.

[0020] An external wall insulation system structure, wherein a horizontal upper snap-fit ​​groove is provided at the upper end of the inner side of the insulation layer, and a horizontal lower snap-fit ​​groove is provided at the lower end of the outer side of the insulation layer, and two adjacent insulation layers are snapped together by the upper snap-fit ​​groove and the lower snap-fit ​​groove.

[0021] A vertical left snap-fit ​​groove is provided on the left side of the outer side of the insulation layer, and a vertical right snap-fit ​​groove is provided on the right side of the inner side of the insulation layer. Two adjacent insulation layers are snapped together by the left snap-fit ​​groove and the right snap-fit ​​groove.

[0022] The beneficial effects of this utility model are as follows: For external wall insulation systems equipped with HN microplastic boards, graphene is used to modify traditional extruded polystyrene boards, and upgrades are made in terms of production formula, production process and production equipment, so that the product has better thermal insulation performance and its comprehensive performance is better than the current traditional insulation system. It has excellent thermal insulation performance and excellent fire resistance.

[0023] In addition, the snap-fit ​​connection method avoids the problem of poor insulation effect caused by poor sealing at the joints between the boards. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the installation of the insulation layer in an embodiment of this utility model.

[0025] Figure 2 This is a schematic diagram of the outer surface of the insulation layer in an embodiment of this utility model.

[0026] Figure 3 for Figure 2 A magnified view of A in the middle.

[0027] Figure 4 for Figure 2 A magnified view of B in the middle.

[0028] Figure 5 This is a schematic diagram of the inner side of the insulation layer in an embodiment of this utility model.

[0029] Figure 6 This is a schematic diagram of the paper tape after it has been applied in an embodiment of this utility model.

[0030] The attached diagram is labeled as follows: 1. Insulation layer; 2. Upper insert plate; 3. Left slot; 4. Left groove; 5. Left snap-fit ​​groove; 6. Lower groove; 7. Lower snap-fit ​​groove; 8. Lower slot; 9. Right insert plate; 10. Upper snap-fit ​​groove; 11. Upper long groove; 12. Right snap-fit ​​groove; 13. Right long groove; 14. Paper tape. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0035] Example 1

[0036] An external wall insulation system includes an adhesive layer installed on a base wall, an insulation layer 1 provided outside the adhesive layer, and a protective layer provided outside the insulation layer 1. As one embodiment, the adhesive layer is an adhesive mortar, mainly composed of cement-based cementitious materials, polymer materials, fillers and additives, etc., which is the adhesive material for bonding thermosetting boards to the base wall.

[0037] The insulation layer 1 is an HN microplastic board. As an example, the HN microplastic board is a polymer rigid foam composite plastic insulation layer 1 made by mixing various high-molecular polymers, modified nano-graphite particles and additives, mixing at high temperature and high pressure, adjusting at low temperature, injecting a composite foaming agent fluid containing supercritical carbon dioxide under high pressure for foaming, and releasing and pressing at low temperature and high pressure.

[0038] The protective layer includes a fireproof leveling layer, a plastering layer, and a finishing layer. The fireproof leveling layer is a 10mm composite thermal insulation mortar. The composite thermal insulation mortar is a thermal insulation mortar composed of redispersible adhesive powder, inorganic cementitious materials, additives, etc., and vitrified microspheres or polystyrene particles as aggregates. It is used as a composite mortar layer between the wall insulation layer 1 and the board joint.

[0039] The finishing layer includes an interface agent, a finishing mortar, and a fiberglass mesh. The interface agent is a special interface agent with strong polarity, applied to the surface of the composite plastic microbubble board, and is an emulsion-like polymer material used to improve the bonding strength between the insulation layer 1 and the bonding mortar and finishing mortar. The finishing mortar is a polymer mortar with good deformation resistance and bonding performance, formulated with polymer, cement, and sand as the main materials. The fiberglass mesh is an alkali-resistant fiberglass mesh with a surface coated with a polymer material. It is a reinforcing crack-resistant material embedded in the crack-resistant mortar, referred to as fiberglass mesh. In addition, several anchors are set on the insulation layer 1 for mechanically fixing the insulation layer 1 to the base wall.

[0040] The manufacturing method of HN microplastic board in this embodiment is as follows: Graphite polystyrene particles, ordinary polystyrene particles, graphene, nucleating agents, flame retardants, etc., are fed into the first-stage plastic extruder via a feeder. After being fully plasticized in the extruder, a foaming agent (carbon dioxide) is injected. The foaming agent is fully mixed with other raw materials and cooled in the second-stage extruder before being extruded through a die. After extrusion, the pressure is rapidly released, and the foaming agent encapsulated in the plastic rapidly expands to form closed cells. Under the action of these cells, the polystyrene plastic forms a foamed board with honeycomb-like closed cells. The board is then shaped to the required thickness and width by a shaping and traction machine, and finally cut into finished products.

[0041] This technology utilizes specialized equipment for carbon dioxide foaming extruded polystyrene boards, stabilizing carbon dioxide in a supercritical state using a constant pressure pump. In the first static mixer, carbon dioxide is thoroughly mixed with an accelerator. A high-pressure metering pump, in conjunction with a mass flow meter, steadily injects the carbon dioxide into the first-stage screw. Through the second and third static mixers, it undergoes graded and thorough mixing with graphite polystyrene particles, ordinary polystyrene particles, and graphene, achieving stable carbon dioxide injection and successful foaming.

[0042] Key technologies include: (1) Carbon dioxide modification technology, which uses ethanol, alkyl phosphate and distilled water to generate an accelerator that synergistically foams with carbon dioxide, significantly improving the compatibility and foaming ratio of carbon dioxide with graphite polystyrene particles and ordinary polystyrene particles.

[0043] High-pressure mixing technology involves carbon dioxide and accelerator being subjected to a high pressure of 20MPa in a high-pressure mixer. The mixture undergoes repeated processes of splitting, merging, rotation, re-splitting, and re-merging to ensure thorough mixing of the carbon dioxide and accelerator (gas and liquid).

[0044] Supercritical control technology consists of a carbon dioxide constant pressure and temperature device and a carbon dioxide pressure stabilizing injection device, which together form a carbon dioxide constant pressure system. This system keeps the carbon dioxide stably in a supercritical state during the injection process, and its dissolving power is 100 times that of liquids and gases.

[0045] Supercritical carbon dioxide fluid: The state above the critical temperature and critical pressure but close to the critical point is called the supercritical state. In the supercritical state, carbon dioxide fluid has the dual characteristics of both gas and liquid phases, possessing both a high diffusion system and low viscosity comparable to gases, and a density and good solubility for substances similar to liquids.

[0046] (4) Melt static mixing technology In order to prevent carbon dioxide escape from the compound during the conveying and extrusion process, a two-stage static mixer was developed and installed on the screw to keep the material fully mixed at all times.

[0047] The construction process is as follows:

[0048] (1) The leveling and clearing of the grassroots level should meet the following requirements:

[0049] 1) Any protruding, hollow, loose, or weathered parts of the base wall should be removed and leveled with special polymer mortar. The leveling mortar should be firmly bonded to the base wall.

[0050] 2) The through-holes and wall defects should be cleaned and repaired with appropriate materials to make them smooth.

[0051] (2) The control lines shall comply with the following provisions:

[0052] 1) Vertical control lines should be hung at all external corners, internal corners, and other necessary locations on the exterior walls;

[0053] 2) A horizontal line should be hung at an appropriate location on each floor to control the verticality and flatness of the HN microplastic board.

[0054] (3) The installation of the support bracket shall comply with the following provisions:

[0055] 1) Install the support brackets in the corresponding positions on the wall according to the vertical and horizontal dividing control lines of the wall, as required by the design and special construction plan;

[0056] 2) During installation, use an electric hammer (impact drill) to drill holes at the installation point, and then use expansion bolts to anchor the support bracket to the reinforced concrete structural member.

[0057] (4) The following regulations shall be met when pasting HN microplastic boards:

[0058] 1) Before pasting the HN microplastic board, an interface agent should be applied to both sides of the HN microplastic board. Damaged boards are prohibited.

[0059] 2) The effective bonding area of ​​the bonding mortar should not be less than 80% of the area of ​​the HN microplastic board. The full bonding method should be used, and the bonding should be carried out from bottom to top.

[0060] 3) During construction, apply a certain thickness of adhesive mortar to the inner bonding surface of the HN micro-plastic board, promptly bond the HN micro-plastic board to the base wall and press it firmly, and check the flatness and verticality with a straightedge and plumb line at any time.

[0061] 4) HN micro-plastic boards should be pressed and slid into place evenly from bottom to top in a horizontal sequence. When pasting, they should be gently rubbed. The vertical joints should be staggered by 1 / 2 board length in each row. A 3mm to 5mm wide joint should be left between boards and filled with adhesive mortar.

[0062] 5) HN microplastic board is pasted on the outer wall of the door and window opening. The thickness depends on the size of the gap between the door and window frame and the opening. Generally, it should not be less than 20mm. Alternatively, polystyrene granule mortar can be used for insulation.

[0063] (5) The construction of mortar containing granulated polystyrene adhesive powder shall comply with the following provisions:

[0064] 1) The slurry of granulated polystyrene powder shall be stirred in accordance with the product instructions and this procedure. The quality of stirring can be judged by measuring the wet apparent density and observing its workability, anti-slip properties, and slurry state. The stirred granulated polystyrene powder shall be used up within the product's allowable time.

[0065] 2) The granulated polystyrene mortar should be applied in layers, with each layer preferably no thicker than 10mm and an interval of at least 12 hours between layers. The first layer of mortar should be compacted, and the last layer should be applied until flush with the mortar patch or screed, and then smoothed with a trowel. Repairs should be made 2-3 hours after the last layer. Before repairs, the smoothness of the granulated polystyrene mortar should be checked with a straightedge, and the deviation should be controlled within ±2mm. For depressions, use a mortar with better fluidity to smooth them; for protrusions, use a trowel to lift them and scrape them flat. Finally, use a trowel to smooth the mortar in layers, first horizontally and then vertically, and check the smoothness with a plumb line and a 2m straightedge to ensure it meets the acceptance standards.

[0066] 3) When constructing doors and windows, first plaster the sides, windowsills, and top edge of the windows, then plaster the main wall surface. Before construction, a single-sided V-shaped ruler should be cut according to the dimensions of the doors and windows, and the edges should be aligned with the ruler to ensure that the doors and windows are square.

[0067] 4) The inside and outside corners should be square. During construction, a wooden square should be used to check the right angle of the base wall corner, and a plumb line should be used to check the verticality of the corner. When plastering the corner of the adhesive polystyrene granule mortar surface layer, a square should be used to press the mortar at the corner and rub it up and down. Use a trowel to repeatedly check, press and repair to achieve the verticality requirement. Then use the inside and outside corner trowels to smooth it, ensuring that the verticality deviation and right angle deviation are both ±2mm.

[0068] 5) On-site inspection of the thickness of the slurry of granulated polystyrene powder should meet the design requirements and there should be no negative deviation.

[0069] (6) The construction of crack-resistant mortar and anchor bolts shall comply with the following provisions:

[0070] 1) The crack-resistant mortar should be applied 24 hours after the HN micro-plastic board is pasted, and the surface should be flat and clean;

[0071] 2) Crack-resistant mortar should be applied in layers, with two coats to achieve a total thickness of 3mm to 5mm. Apply the first coat and press in the fiberglass mesh. The fiberglass mesh should be laid from top to bottom, smoothed and straightened, and the squareness and verticality of the inside and outside corners should be maintained. The horizontal and vertical overlap width should not be less than 100mm.

[0072] 3) After the first layer of crack-resistant mortar has been left to stand for 24 hours, anchor bolts should be used for fixation. The number of anchor bolts must meet the requirements of this code and relevant standards. The effective anchoring depth of the anchor bolts must meet the requirements of the tensile bearing capacity standard value, not less than 30mm in concrete walls and not less than 50mm in masonry walls; then apply the second layer of crack-resistant mortar on its surface, ensuring that the mortar is smooth and wrinkle-free.

[0073] 4) After the crack-resistant mortar and anchor bolts are applied, they must not be disturbed and must be left to cure for at least 24 hours before proceeding to the next step. In cold and humid climates, the curing time should be extended appropriately.

[0074] (7) The construction of the finishing layer shall comply with the following provisions:

[0075] After the plastering layer passes inspection, the paint finishing layer can be applied. The application of lightweight materials such as paint and finishing mortar for the finishing layer must meet the requirements of the "Code for Construction and Acceptance of Building Coating Engineering" JGJ / T 29.

[0076] Example 2

[0077] See Figures 1-6 The upper inner side of the insulation layer 1 facing the base wall has a horizontal upper locking groove 10, and the lower outer side of the insulation layer 1 has a horizontal lower locking groove 7. The upper and lower adjacent insulation layers 1 are locked together by the upper locking groove 10 and the lower locking groove 7.

[0078] A vertical left snap-fit ​​groove 5 is provided on the left side of the outer side of the insulation layer 1, and a vertical right snap-fit ​​groove 12 is provided on the right side of the inner side of the insulation layer 1. Two adjacent insulation layers 1 are snapped together by the left snap-fit ​​groove 5 and the right snap-fit ​​groove 12. In addition, at the edge of the wall, the upper snap-fit ​​groove 10 and the lower snap-fit ​​groove 7 and other related components can be cut off to adapt to the installation structure requirements of the wall. It should be noted that since the connection between the insulation layers 1 is by snap-fit, the overall layer structure of the insulation layer is maintained at the snap-fit ​​groove.

[0079] A left groove 4 is provided on the bottom surface of the left snap-fit ​​groove 5, which is parallel to the base wall, and a lower groove 6 is provided on the bottom surface of the lower snap-fit ​​groove 7, which is parallel to the base wall. The left groove 4 and the lower groove 6 are the places where sealant is applied.

[0080] An upper insert plate 2 is provided on the upper end face of the insulation layer near the upper card slot 10, and a lower slot 8 that cooperates with the upper insert plate 2 is provided on the side of the lower card slot 7 that is perpendicular to the base wall. The upper insert plate 2 is located in the lower slot 8.

[0081] A right insert plate 9 is provided on the right end face of the insulation layer 1 near the right card slot 12. A left slot 3 that mates with the right insert plate 9 is provided on the side of the left card slot 5 that is perpendicular to the base wall. The right insert plate 9 is located in the left slot 3.

[0082] Paper tape 14 is provided in both the left groove 4 and the lower groove 6. One side of the paper tape 14 is pasted into the left groove 4 or the lower groove 6. The paper tape 14 is provided with sealant applied along the left groove 4 or the lower groove 6. After the paper tape 14 wraps the sealant and covers the corresponding left slot 3 or lower slot 8, the other side is pasted onto the inner side of the left snap-fit ​​groove 5 or the lower snap-fit ​​groove 7. When the corresponding upper insert plate 2 or right insert plate 9 is inserted into the corresponding lower slot 8 or left slot 3, the corresponding paper tape 14 will be brought into the interior. At this time, the sealant will be squeezed out, thereby achieving the sealing of the joint between the two adjacent insulation layers 1. The paper tape 14 plays a temporary wrapping and supporting role for the sealant. Therefore, it can be applied in advance before the installation of the insulation layer 1. After installation, the sealant can be squeezed out, achieving a better sealing effect. At the same time, it avoids the disadvantages of applying sealant later, such as the sealant not being able to penetrate into the interior, resulting in poor sealing effect and poor insulation effect. After all the insulation layers 1 are installed, sealant is applied to the external joints.

[0083] Several upper elongated grooves 11 are provided on the side of the upper slot 10 that is parallel to the base wall. The upper elongated grooves 11 cooperate with the lower grooves 6. When the upper insert plate 2 is inserted into the corresponding lower slot 8, the sealant in the lower groove 6 comes into contact with the several upper elongated grooves 11 and achieves a further sealing effect after solidification.

[0084] The right slot 12 has several right elongated grooves 13 that mate with the left groove 4 on its side parallel to the base wall. When the right insert plate 9 is inserted into the corresponding left slot 3, the sealant in the left groove 4 comes into contact with the several right elongated grooves 13 and solidifies to achieve a further sealing effect.

[0085] The technical features of this utility model not described can be implemented by or by using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this utility model, and this utility model is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model should also be within the protection scope of this utility model.

Claims

1. An external thermal insulation system, characterized in that, It includes an adhesive layer installed on the base wall, an insulation layer (1) is provided outside the adhesive layer, and a protective layer is provided outside the insulation layer (1); The insulation layer (1) is an HN microplastic board; The protective layer includes a fireproof leveling layer, a plastering layer, and a finishing layer; The finishing layer includes an interface agent, a finishing mortar, and a fiberglass mesh. The insulation layer (1) has a horizontal upper locking groove (10) at the upper end of the inner side facing the base wall, and a horizontal lower locking groove (7) at the lower end of the outer side of the insulation layer (1). Two adjacent insulation layers (1) are locked together by the upper locking groove (10) and the lower locking groove (7). A vertical left snap-fit ​​groove (5) is provided on the left side of the outer side of the insulation layer (1), and a vertical right snap-fit ​​groove (12) is provided on the right side of the inner side of the insulation layer (1). Two adjacent insulation layers (1) are snapped together by the left snap-fit ​​groove (5) and the right snap-fit ​​groove (12).

2. The external thermal insulation composite system according to claim 1, characterized in that A left groove (4) is provided on the bottom surface of the left snap-fit ​​groove (5) that is parallel to the base wall, and a lower groove (6) is provided on the bottom surface of the lower snap-fit ​​groove (7) that is parallel to the base wall.

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