Building external wall thermal insulation system based on steel structure cold and hot bridge partition and construction method

Abstract

The invention discloses a building external wall thermal insulation system based on steel structure cold and hot bridge partition and a construction method thereof, and the system comprises a building external wall main body, a steel structure connecting piece connected with the building external wall main body, and a main body thermal insulation layer, a protective layer and a facing layer which are sequentially arranged outside the building external wall main body, receding grooves are formed in the areas, corresponding to the steel structure connecting pieces, of the main body heat preservation layer; the system further comprises a cold and hot bridge partition assembly, the cold and hot bridge partition assembly is arranged in the receding groove and wraps the portion, exposed out of the building outer wall body, of the steel structure connecting piece, the cold and hot bridge partition assembly is made of heat insulation materials, and the cold and hot bridge partition assembly and the body heat preservation layer are connected through sealing filler. All the metal components connected with the outer wall are subjected to complete heat preservation coating treatment, a cold and heat transfer path is fundamentally cut off, the cold and heat bridge effect is eliminated, accordingly, continuity and integrity of a heat preservation layer of the outer wall of the building are achieved, and the energy-saving effect and the living comfort of the building are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of building energy conservation and insulation technology, specifically to a building exterior wall insulation system based on steel structure thermal bridge isolation and its construction method. Background Technology

[0002] With increasingly stringent requirements for building energy conservation, external wall insulation systems have become standard in modern buildings. Traditional external wall insulation systems typically achieve thermal insulation by laying insulation boards on the main body of the building's exterior walls. However, in practical applications, building exterior walls often contain a large number of metal components connected to the main structure (such as steel beams, steel columns, supports, embedded parts, scaffolding connectors, etc.). The thermal conductivity of these metal components is much higher than that of the wall materials and insulation materials, forming "thermal bridges."

[0003] The presence of thermal bridging can cause the following problems:

[0004] 1. Energy loss: Indoor heat is lost in large quantities through metal components in winter, while outdoor heat is transferred indoors through metal components in summer, which seriously reduces the overall efficiency of the insulation system and increases heating and cooling energy consumption.

[0005] 2. Condensation and mold: When the inner surface temperature of the thermal bridge is much lower than the indoor dew point temperature, water vapor will condense, which will cause problems such as dampness, mold and powdering on the wall over time, affecting the health of the indoor environment and the life of the decorative layer.

[0006] 3. Thermal stress damage: Due to excessive temperature differences in different parts, the resulting thermal stress may cause the insulation layer or decorative layer to crack or fall off.

[0007] Currently, most conventional insulation methods focus only on the main wall structure, neglecting the special treatment of these metal connection nodes, or using rudimentary methods (such as simple wrapping), which fail to form a continuous and effective thermal barrier, thus failing to eradicate the problem of thermal bridging. Therefore, there is an urgent need for a systematic solution that can completely isolate such thermal bridges in steel structures and improve the overall thermal insulation performance of buildings. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a building exterior wall insulation system and its construction method based on steel structure thermal bridge isolation. By completely insulating all metal components connected to the exterior wall, the system fundamentally cuts off the heat transfer path, eliminates the thermal bridge effect, and thus achieves the continuity and integrity of the building exterior wall insulation layer, significantly improving the building's energy efficiency and living comfort.

[0009] On the one hand, the present invention provides a building exterior wall insulation system based on steel structure thermal bridge isolation, including a building exterior wall body, a steel structure connector connected to the building exterior wall body, and a main insulation layer, a protective layer and a finishing layer sequentially disposed outside the building exterior wall body, wherein the main insulation layer is provided with a clearance groove in the area corresponding to the steel structure connector;

[0010] It also includes a thermal bridge partition component, which is located in the clearance groove and covers the part of the steel structure connector that is exposed outside the main body of the building exterior wall. The thermal bridge partition component is made of thermal insulation material and its thickness is not less than the thickness of the main insulation layer. The thermal bridge partition component and the main insulation layer are connected by a sealing filler.

[0011] Furthermore, the thermal bridge insulation component is an insulation board pre-formed according to the shape of the steel structure.

[0012] Furthermore, the thermal bridging component is fixed to the steel structure connector or the main body of the building exterior wall by special anchors or highly adhesive materials.

[0013] Furthermore, the sealing filler includes strip-shaped insulation material filled in the joint between the main insulation layer and the thermal bridge isolation component, and weather-resistant sealant disposed at the outer end of the joint.

[0014] Furthermore, the finishing layer is a real stone paint or coating applied to the outside of the protective layer.

[0015] Furthermore, the finishing layer is a dry-hanging curtain wall, which includes a keel and a curtain wall installed outside the keel. The keel includes vertical keels and horizontal keels that are fixedly connected in a crisscross pattern. The vertical keels are installed outside the main body of the building exterior wall through adapters. The adapters include multiple screws and mounting plates. One end of each screw passes through the main body insulation layer and is anchored inside the main body of the building exterior wall. The other end of each screw passes through the mounting plate and is threaded with two nuts that are respectively limited to both sides of the mounting plate. The mounting plate is fixedly provided with connecting arms, and the vertical keels are fixed on the connecting arms.

[0016] Furthermore, the connecting arm includes two support plates arranged opposite each other on the left and right, and the vertical keel is fixed between the two support plates by bolts.

[0017] On the other hand, the present invention provides a construction method for a building exterior wall insulation system based on steel structure thermal bridge isolation, comprising the following steps:

[0018] Step S10: Clean and level the main surface of the building's exterior walls;

[0019] Step S20: Wrap the pre-processed thermal bridge partition components around the exposed parts of the steel structure connectors outside the main body of the building exterior wall;

[0020] Step S30: Lay insulation boards on the exterior of the building's main exterior wall as the main insulation layer, and tightly connect the main insulation layer with the installed thermal bridge insulation components.

[0021] Step S40: Fill the joint between the main insulation layer and the thermal bridge insulation component with strip insulation material and seal it with weather-resistant sealant.

[0022] Step S50: Apply a plastering mortar to the outside of the main insulation layer and embed an alkali-resistant fiberglass mesh as a protective layer.

[0023] Step S60: Apply the decorative surface layer.

[0024] Furthermore, in step S60, the decorative surface layer is applied by spraying real stone paint or scraping paint over the protective layer.

[0025] Furthermore, in step S60, the method of constructing the decorative surface layer is to install a dry-hanging curtain wall outside the protective layer, including the following steps:

[0026] Step S61: Measure and lay out the lines to determine the installation position of each adapter, and install each adapter separately. When installing the adapter, drill holes from the outside of the protective layer into the main body of the building exterior wall for each corresponding screw. Then, insert each screw into the drill hole and anchor each screw in the drill hole using a chemical expansion agent. Then, screw a nut into each screw and put the mounting plate with the connecting arm on each screw. Screw a nut into each screw so that the mounting plate is locked between the two nuts on each screw.

[0027] Step S62: Install the vertical keel on the connecting arm of each corresponding adapter;

[0028] Step S63: Weld horizontal keels to the outside of each vertical keel;

[0029] Step S64: Install the curtain wall outside the horizontal keel.

[0030] The beneficial effects of this invention are reflected in:

[0031] This invention completely thermally insulates the steel structure connectors from the external environment by wrapping them with thermal bridge insulation components, effectively cutting off the shortcut for energy loss. This results in a holistic and fundamental improvement in the thermal insulation performance of the building's exterior walls, with energy savings significantly higher than traditional insulation methods. It also prevents condensation on the inner surfaces of thermal bridge areas, effectively preventing problems such as dampness, mold, and internal steel corrosion. This protects the building structure, extends the building's lifespan, and improves the indoor health environment.

[0032] The thermal bridge insulation component is seamlessly connected to the main insulation layer through sealing filler, forming a continuous, complete, and thermal bridge-free composite insulation system. The entire insulation system forms a continuous whole, reducing thermal stress differences caused by excessive local temperature differences, lowering the risk of cracking, hollowing, and falling off of the insulation and finishing layers, and improving the safety and durability of the system. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0034] Figure 1 This is an assembly diagram of an embodiment of the present invention;

[0035] Figure 2 This is an exploded view of an embodiment of the present invention;

[0036] Figure 3 This is a cross-sectional view of an embodiment of the present invention;

[0037] Figure 4 This is an assembly diagram of another embodiment of the present invention;

[0038] Figure 5 This is an exploded view of another embodiment of the present invention;

[0039] Figure 6 This is a cross-sectional view of another embodiment of the present invention;

[0040] Figure 7 This is a schematic diagram of the structure of an adapter according to another embodiment of the present invention.

[0041] In the attached diagram, 100 - main body of building exterior wall; 200 - steel structure connector; 300 - main body insulation layer; 310 - clearance groove; 400 - protective layer; 500 - finishing layer; 600 - thermal bridging component; 700 - sealing filler; 710 - strip insulation material; 720 - weather-resistant sealant; 800 - keel; 810 - vertical keel; 820 - horizontal keel; 830 - adapter; 831 - screw; 832 - mounting plate; 833 - nut; 834 - connecting arm; 8341 - support plate; 8342 - bolt. Detailed Implementation

[0042] The embodiments of the technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, and are therefore only examples, and should not be used to limit the scope of protection of the present invention.

[0043] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0044] like Figures 1-7 As shown, this embodiment of the invention provides a building exterior wall insulation system based on steel structure thermal bridge isolation, including a building exterior wall body 100, a steel structure connector 200 connected to the building exterior wall body 100, and a main insulation layer 300, a protective layer 400 and a finishing layer 500 sequentially disposed outside the building exterior wall body 100. The main insulation layer 300 is provided with a relief groove 310 in the area corresponding to the steel structure connector 200.

[0045] The building exterior wall insulation system also includes a thermal bridge insulation component 600. The thermal bridge insulation component 600 is located in the relief groove 310 and covers the part of the steel structure connector 200 that is exposed outside the main body of the building exterior wall 100. The thermal bridge insulation component 600 is made of thermal insulation material and its thickness is not less than the thickness of the main insulation layer 300. The thermal bridge insulation component 600 and the main insulation layer 300 are connected by a sealing filler 700.

[0046] Optionally, the thermal bridge insulation component 600 is an insulation panel pre-formed according to the shape of the steel structure.

[0047] Optionally, the thermal bridging component 600 is fixed to the steel structure connector 200 or the main body of the building exterior wall 100 by special anchors or highly adhesive materials.

[0048] Optionally, the sealing filler 700 includes strip insulation material 710 filled in the joint between the main insulation layer 300 and the thermal bridge isolation component 600, and weather-resistant sealant 720 disposed at the outer end of the joint.

[0049] It is understood that the main insulation layer 300 and the thermal bridge insulation component 600 in this embodiment can be made of materials such as molded polystyrene board (EPS), extruded polystyrene board (XPS), polyurethane foam (PU) or insulation rock wool.

[0050] It can be understood that "the thickness of the thermal bridge partition component 600 is not less than the thickness of the main insulation layer 300" means that the thickness of the thermal bridge partition component 600 can be equal to the thickness of the main insulation layer 300. In this case, the steel structure connector 200 does not exceed the thickness of the main insulation layer 300, and the exterior wall surface is flat after construction (e.g., Figures 1-3 As shown), the thickness of the thermal bridge partition component 600 can also be greater than the thickness of the main insulation layer 300. In this case, the steel structure connector 200 can extend beyond the main insulation layer 300. After construction, the thermal bridge partition component 600 protrudes from the exterior wall surface (e.g., Figures 4-6 (As shown).

[0051] It is understood that the protective layer 400 in this embodiment is formed by applying a plastering mortar to the outside of the main insulation layer 300 and embedding an alkali-resistant fiberglass mesh.

[0052] In one embodiment, such as Figures 1-3 As shown, the finishing layer 500 is a real stone paint or coating applied to the outside of the protective layer 400. In order to ensure the aesthetics of the exterior wall, this structure is suitable for situations where the thermal bridging component 600 is flush with the main insulation layer 300.

[0053] In another embodiment, such as Figures 4-7 As shown, the finishing layer 500 is a dry-hanging curtain wall, which includes a keel 800 and a curtain wall (not shown in the figure) installed outside the keel 800. The keel 800 includes vertical keels 810 and horizontal keels 820 that are fixedly connected in a crisscross pattern. The vertical keels 810 are installed outside the main body of the building exterior wall 100 through adapters 830. The adapter 830 includes multiple screws 831 and a mounting plate 832. One end of each screw 831 passes through the main insulation layer 300 and is anchored inside the main body of the building exterior wall 100. The other end of each screw 831 passes through the mounting plate 832 and is threadedly connected to two nuts 833 that are respectively limited to both sides of the mounting plate 832. The mounting plate 832 is fixedly provided with a connecting arm 834, and the vertical keels 810 are fixed on the connecting arm 834.

[0054] To facilitate the installation of the vertical keel 810, the connecting arm 834 includes two support plates 8341 arranged opposite each other on the left and right sides. The vertical keel 810 is fixed between the two support plates 8341 by bolts 8342.

[0055] In this embodiment, the mounting plate 832 is disposed on the outside of the main insulation layer 300. The mounting plate 832 is fixed to the main body of the building exterior wall 100 by a screw 831 passing through the main insulation layer 300. The keel 800 is fixed on the connecting arm 834 of the mounting plate 832, which can reduce the thermal bridge effect between the keel 800 and the main body of the building exterior wall 100 and improve the thermal insulation effect. The mounting plate 832 is supported and locked by two nuts 833 on the screw 831. The main insulation layer 300 does not need to bear the pressure of the mounting plate 832. Even if a main insulation layer 300 with lower strength is used, it can meet the installation requirements of dry-hanging curtain wall. At the same time, the installation position of the mounting plate 832 can be adjusted by the nuts 833, which reduces the installation difficulty.

[0056] The above structure can be applied not only to cases where the thickness of the thermal bridge insulation component 600 is greater than the thickness of the main insulation layer 300.

[0057] like Figures 1-7 As shown in the figure, this invention also provides a construction method for a building exterior wall insulation system based on steel structure thermal bridge isolation, including the following steps:

[0058] Step S10: Clean and level the surface of the main exterior wall 100.

[0059] Step S20: Wrap the pre-processed thermal bridge partition component 600 around the part of the steel structure connector 200 that is exposed outside the main body of the building exterior wall 100;

[0060] Step S30: Lay insulation board as main insulation layer 300 on the outside of the main building wall 100, and the main insulation layer 300 is tightly connected with the installed thermal bridge isolation component 600.

[0061] Step S40: Fill the joint between the main insulation layer 300 and the thermal bridge insulation component 600 with strip insulation material 710 and seal it with weather-resistant sealant 720.

[0062] Step S50: Apply a plastering mortar to the outside of the main insulation layer 300 and embed an alkali-resistant fiberglass mesh as a protective layer 400.

[0063] Step S60: Apply the decorative surface layer 500.

[0064] Optionally, in step S60, the decorative surface layer 500 is constructed by spraying real stone paint or applying paint to the outside of the protective layer 400.

[0065] Optionally, in step S60, the decorative surface layer 500 is constructed by installing a dry-hanging curtain wall outside the protective layer 400, including the following steps:

[0066] Step S61: Measure and lay out the lines to determine the installation position of each adapter 830, and install each adapter 830 respectively. When installing the adapter 830, drill holes from the outside of the protective layer 400 into the main body 100 of the building exterior wall corresponding to each screw 831. Then, insert each screw 831 into each drill hole and anchor each screw 831 in each drill hole using a chemical expansion agent. Then, screw a nut 833 into each screw 831, and put the mounting plate 832 with the connecting arm 834 on the outside onto each screw 831. Then, screw a nut 833 into each screw 831, so that the mounting plate 832 is locked between the two nuts 833 on each screw 831.

[0067] Step S62: Install the vertical keel 810 onto the connecting arm 834 of the corresponding adapter 830;

[0068] Step S63: Weld horizontal keels 820 to the outside of each vertical keel 810;

[0069] Step S64: Install the curtain wall outside the horizontal keel 820.

[0070] This invention completely thermally insulates the steel structure connectors 200 from the external environment by wrapping them with thermal bridge insulation components 600, essentially "wearing a cotton coat." This effectively cuts off the shortcut for energy loss, resulting in a holistic and fundamental improvement in the thermal insulation performance of the building's exterior walls. The energy-saving rate is significantly higher than traditional insulation methods. It also prevents condensation on the inner surface of the thermal bridge areas, effectively preventing problems such as dampness, mold, and internal steel corrosion. This protects the building structure, extends the building's service life, and improves the indoor health environment.

[0071] The thermal bridge insulation component 600 and the main insulation layer 300 are seamlessly connected by the sealing filler 700, forming a continuous, complete, and thermal bridge-free composite insulation system. The entire insulation system forms a continuous whole, reducing the thermal stress difference caused by excessive local temperature difference, reducing the risk of cracking, hollowing, and falling off of the insulation layer and the finishing layer, and improving the safety and durability of the system.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A building exterior wall insulation system based on steel structure thermal bridge isolation, comprising a main building exterior wall, steel structure connectors connected to the main building exterior wall, and a main insulation layer, a protective layer, and a finishing layer sequentially disposed outside the main building exterior wall, wherein the main insulation layer has an avoidance groove in the area corresponding to the steel structure connector, characterized in that: It also includes a thermal bridge partition component, which is located in the clearance groove and covers the part of the steel structure connector that is exposed outside the main body of the building exterior wall. The thermal bridge partition component is made of thermal insulation material and its thickness is not less than the thickness of the main insulation layer. The thermal bridge partition component and the main insulation layer are connected by a sealing filler.

2. The building exterior wall insulation system based on steel structure thermal bridge isolation as described in claim 1, characterized in that: The thermal bridge insulation component is a pre-formed insulation board according to the shape of the steel structure.

3. The building exterior wall insulation system based on steel structure thermal bridge isolation as described in claim 1, characterized in that: The thermal bridging component is fixed to the steel structure connector or the main body of the building exterior wall by special anchors or high-adhesion materials.

4. The building exterior wall insulation system based on steel structure thermal bridge isolation as described in claim 1, characterized in that: The sealing filler includes strip insulation material filled in the joint between the main insulation layer and the thermal bridge isolation component, and weather-resistant sealant disposed at the outer end of the joint.

5. The building exterior wall insulation system based on steel structure thermal bridge isolation as described in claim 1, characterized in that: The finishing layer is a real stone paint or coating applied to the outside of the protective layer.

6. The building exterior wall insulation system based on steel structure thermal bridge isolation as described in claim 1, characterized in that: The decorative layer is a dry-hanging curtain wall, which includes a keel and a curtain wall installed outside the keel. The keel includes vertical keels and horizontal keels that are fixedly connected in a crisscross pattern. The vertical keels are installed outside the main body of the building exterior wall through adapters. The adapters include multiple screws and mounting plates. One end of each screw passes through the main insulation layer and is anchored inside the main body of the building exterior wall. The other end of each screw passes through the mounting plate and is threaded with two nuts that are respectively limited to both sides of the mounting plate. The mounting plate is fixed with connecting arms, and the vertical keels are fixed to the connecting arms.

7. The building exterior wall insulation system based on steel structure thermal bridge isolation as described in claim 6, characterized in that: The connecting arm includes two support plates arranged opposite each other on the left and right, and the vertical keel is fixed between the two support plates by bolts.

8. A construction method for a building exterior wall insulation system based on steel structure thermal bridge partitions, characterized in that: Includes the following steps: Step S10: Clean and level the main surface of the building's exterior walls; Step S20: Wrap the pre-processed thermal bridge partition components around the exposed parts of the steel structure connectors outside the main body of the building exterior wall; Step S30: Lay insulation boards on the exterior of the building's main exterior wall as the main insulation layer, and tightly connect the main insulation layer with the installed thermal bridge insulation components. Step S40: Fill the joint between the main insulation layer and the thermal bridge insulation component with strip insulation material and seal it with weather-resistant sealant. Step S50: Apply a plastering mortar to the outside of the main insulation layer and embed an alkali-resistant fiberglass mesh as a protective layer. Step S60: Apply the decorative surface layer.

9. The construction method of the building exterior wall insulation system based on steel structure thermal bridge partition as described in claim 8, characterized in that: In step S60, the decorative surface layer is applied by spraying real stone paint or scraping paint on the outside of the protective layer.

10. The construction method of the building exterior wall insulation system based on steel structure thermal bridge partition as described in claim 8, characterized in that: In step S60, the method of constructing the decorative surface layer is to install a dry-hanging curtain wall outside the protective layer, including the following steps: Step S61: Measure and lay out the lines to determine the installation position of each adapter, and install each adapter separately. When installing the adapter, drill holes from the outside of the protective layer into the main body of the building exterior wall for each corresponding screw. Then, insert each screw into the drill hole and anchor each screw in the drill hole using a chemical expansion agent. Then, screw a nut into each screw and put the mounting plate with the connecting arm on each screw. Screw a nut into each screw so that the mounting plate is locked between the two nuts on each screw. Step S62: Install the vertical keel on the connecting arm of each corresponding adapter; Step S63: Weld horizontal keels to the outside of each vertical keel; Step S64: Install the curtain wall outside the horizontal keel.

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