Fabricated building external wall panel, wall body structure and construction method

Abstract

The invention relates to a fabricated building external wall panel, a wall body structure and a construction method, and relates to the field of fireproof wall body structures. The fabricated building external wall panel comprises an outer side wall panel, at least one first inner side panel and at least one second inner side panel, the inner side face of the outer side wall plate is fixedly connected with at least one first inner side plate and at least one second inner side plate, the first inner side plate at least comprises an inner heat preservation layer and an inner side fireproof wall plate, the second inner side plate at least comprises an efficient heat preservation layer, and the thickness of the second inner side plate is smaller than that of the first inner side plate. The wall structure provided by the invention can realize factorization production of the external wall panel and on-site full-assembly type construction, is convenient to mount and has good fireproof performance, and the connection between the wall and the floor is stable and reliable.

Description

Technical Field

[0001] The present invention relates to the field of assembled wall structures, and in particular to an assembled building exterior wall panel, a wall structure and a construction method. Background Art

[0002] With the rapid development of the construction industry and the continuous improvement of building safety performance requirements, especially the release of building fire protection design specifications, more stringent requirements have been put forward for the selection and use of exterior wall insulation materials. The exterior wall insulation system in traditional prefabricated buildings faces many challenges. The lack of systematic and detailed design of prefabricated buildings includes but is not limited to installation difficulties, insufficient structural safety, substandard fire protection performance, and difficulty in solving waterproofing problems. The existence of these problems has seriously restricted the application and development of prefabricated buildings.

[0003] Specifically, in the prior art, attaching the insulation layer to the outside of the prefabricated wall panel has brought many difficulties and inconveniences in actual operation, such as frequent fire accidents of external wall insulation, which has aggravated the complexity and risk of the installation process, and frequent safety accidents such as failure of grouting links. At the same time, it is difficult to meet the requirements of fire protection design specifications, which can easily lead to serious problems such as cracking, falling off and fire of the external insulation layer of the wall. In addition, during the installation of the sandwich wall, the overall mass is too large, the installation is difficult, the hoisting and transportation requirements are high, and the cost is high, which seriously affects the design, promotion and application of prefabricated buildings. Summary of the invention

[0004] In order to improve the fire prevention and thermal insulation effects of the wall, eliminate structural cold bridges, and improve installation convenience and installation stability, the present invention provides an assembled building exterior wall panel, a wall structure and a construction method.

[0005] In the first aspect, the present invention provides an assembled building exterior wall panel, adopting the following technical solution: comprising an outer wall panel, at least one first inner panel and at least one second inner panel corresponding to the outer wall panel, the inner side surface of the outer wall panel is fixedly connected to at least one first inner panel and at least one second inner panel, the first inner panel at least comprises an inner insulation layer and an inner fire wall panel, the second inner panel at least comprises a high-efficiency insulation layer, and the thickness of the second inner panel is less than the thickness of the first inner panel.

[0006] Optionally, the outer wall panel is fixedly connected to the first inner panel and the second inner panel via an adhesive layer.

[0007] Optionally, the outer wall panel and the first inner panel are both provided with at least one through hole, and after the outer wall panel and the first inner panel are bonded together, the through hole of the outer wall panel is connected with the through hole of the first inner panel to allow the threaded rod to pass through.

[0008] Optionally, a staggered compartment fire protection structure is provided in the inner insulation layer.

[0009] In a second aspect, the present invention provides a wall structure, adopting the following technical scheme: comprising any one of the above-mentioned prefabricated building exterior wall panels, and a floor structure; the floor structure comprises a main structure and a support portion, the support portion is arranged on the outer end surface of the main structure and is arranged in multiple intervals along the horizontal direction, at least part of the prefabricated building exterior wall panels is supported by two adjacent support portions, and the support portion is a steel support member fixedly connected to the embedded parts of the main structure and / or is integrally formed with the main structure.

[0010] Optionally, at least part of the upper end surface of the support portion supports two adjacent prefabricated building exterior wall panels.

[0011] Optionally, the outer end face of the floor structure is projected onto the inner side surface of the outer wall panel to obtain a covered area and an uncovered area, the covered area of ​​the inner side surface of the outer wall panel is adhered to the second inner panel via an adhesive layer, and the uncovered area of ​​the inner side surface of the outer wall panel is adhered to the first inner panel via an adhesive layer.

[0012] Optionally, a high-efficiency thermal insulation layer is pasted on the outer end surface of the support portion, and the outer end surface of the high-efficiency thermal insulation layer is flush with the outer side surface of the outer wall panel.

[0013] Optionally, an upper end surface of the support portion is flush with an upper end surface of the main structure, and a thickness of the support portion is smaller than a thickness of the main structure.

[0014] Optionally, an A-class insulation board is pasted between adjacent support parts, the upper end surface and the lower end surface of the A-class insulation board are flush with the upper end surface and the lower end surface of the support part, and the outer side surface of the A-class insulation board is flush with the outer side surface of the outer wall panel.

[0015] Optionally, it includes a connecting component, which includes a threaded rod, an L-shaped connecting piece, an insulating stress pad and a nut, one end face of the L-shaped connecting piece is fixedly connected to the embedded part of the wall panel structure, and the other end face of the L-shaped connecting piece is abutted against the inner side surface of the prefabricated building exterior wall panel, and the threaded rod passes through the insulating stress pad, the prefabricated building exterior wall panel and the L-shaped connecting piece in sequence and is fixedly connected to the nut.

[0016] In a third aspect, the present invention provides a construction method for an assembled building exterior wall panel, which adopts the following technical solution: a wall structure for the above solution,

[0017] S1: The upper end surface and the lower end surface of the main structure are respectively provided with embedded parts, and a plurality of L-shaped connecting parts are respectively positioned and fixedly installed with the embedded parts;

[0018] S2: The outer wall panel is fixedly bonded to the first inner panel and the second inner panel through the adhesive layer to obtain the assembled building outer wall panel, and the assembled building outer wall panel is placed at a corresponding position of the floor structure so that the support part supports the assembled building outer wall panel;

[0019] Alternatively, the outer wall panel is placed at a corresponding position of the floor structure, and according to the projection of the floor structure on the outer wall panel, the first inner panel and the second inner panel are adhered and fixed to corresponding areas of the outer wall panel through the adhesive layer to form the assembled building outer wall panel and wall structure;

[0020] S3: pasting the Class A insulation board between adjacent support parts;

[0021] S4: passing the threaded rod through the assembled building exterior wall panel, and then passing it through the L-shaped connector, and fixing the threaded rod with the nut;

[0022] S5: injecting caulking glue into the gaps between the assembled building exterior wall panels, the high-efficiency thermal insulation layer and the main structure;

[0023] S6: potting treatment;

[0024] S7: sequentially covering the outer facade of the outer wall panel with an anti-seepage layer, a thermal strain resistance layer, a reinforcement layer and a waterproof protective layer.

[0025] Optionally, the L-shaped connecting member includes a first connecting portion and a second connecting portion, the first connecting portion is used to connect with the embedded part, one side of the second connecting portion is an abutting surface, the abutting surface is used to abut with the assembled building exterior wall panel, the second connecting portion is provided with a first through hole for the threaded rod to pass through, and a reinforcing fixing portion is provided on the opposite side of the abutting surface, the reinforcing fixing portion has a glue injection cavity and a pouring port inside, and the reinforcing fixing portion is provided with a second through hole corresponding to the first through hole, so that the threaded rod can pass through the first through hole and the second through hole in sequence;

[0026] After the threaded rod is fixed by the nut, the method further comprises the step of injecting structural adhesive into the adhesive injection cavity through the pouring port for solidification.

[0027] In summary, the present invention includes at least one of the following beneficial technical effects:

[0028] (1) The prefabricated building exterior wall panel includes a first inner panel and a second inner panel. The first inner panel and the second inner panel have different thicknesses, areas, and geometric dimensions. According to different floor structures, different areas of the exterior wall panel are bonded to the first inner panel or the second inner panel. Under the premise of ensuring compatibility with the floor structure, the thermal insulation performance can also be effectively guaranteed.

[0029] (2) The prefabricated building exterior wall panels adopt a layered design, with the first inner panel assuming dual functions of fire protection and heat preservation. The inner fire wall panel in the first inner panel is arranged on the inner side relative to the outer wall panel, and together with the floor structure, it isolates the indoor environment into a closed space, reducing the possibility of fire risk being transmitted to other indoor spaces through the exterior wall panel, and also improving the overall assembly rate of the project site.

[0030] (3) The main structure is equipped with support parts to support the base wall panels, internal insulation layer and fireproof layer, ensuring tight installation, improving sealing and facilitating assembly. The setting of the high-efficiency insulation layer effectively blocks the thermal bridge effect, improves the insulation performance of the wall, and blocks the spread of flames. The A-grade insulation board filling ensures that all parts of the wall have good insulation performance, while strengthening the connection between adjacent support parts, realizing embedded installation of the inner wall and external installation of the outer wall by supporting and pulling up and down, improving the overall stability and durability of the exterior wall panels and the main structure.

[0031] (4) The construction method of the exterior wall panels of prefabricated buildings allows the exterior wall panels to be pre-installed with the first interior panel and the second interior panel in the factory. Only simple splicing is required on site, avoiding the use of large-scale lifting and transportation equipment, eliminating the construction of exterior wall panel insulation, reducing construction complexity and time, and improving efficiency. It also allows the first interior panels of different thicknesses of interior fire wall panels to be selected based on the needs of different installation environments and then be glued, assembled and installed on the construction site, meeting the fire protection requirements of various types of buildings and being suitable for various construction conditions. This design not only ensures the safety and functionality of the wall, but also meets the specific needs of different projects, improves the compatibility and installation flexibility of the exterior wall panels of prefabricated buildings, and is suitable for prefabricated buildings of all levels. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0033] Figure 2 yes Figure 1 Schematic cross-sectional view of AA in the figure;

[0034] Figure 3 yes Figure 1 Schematic diagram of another side perspective;

[0035] Figure 4 yes Figure 3 A schematic cross-sectional view of the middle BB;

[0036] Figure 5 yes Figure 3 Schematic cross-sectional view of CC;

[0037] Figure 6 It is a cross-sectional schematic diagram of the wall structure from a top-down perspective;

[0038] Figure 7 It is a schematic diagram of the structure of the connected components;

[0039] Figure 8 It is a structural schematic diagram of an L-shaped connector.

[0040] Explanation of the reference numerals in the accompanying drawings: 1. Outer wall panel; 2. Adhesive layer; 3. Inner insulation layer; 4. Compartment fireproof structure; 5. Inner fire wall panel; 6. Interior decoration surface layer; 7. Through hole; 8. High-efficiency insulation layer; 9. Adhesive glue; 10. Potting treatment structure; 11. Connection component; 12. Anti-seepage layer; 13. Thermal strain resistance layer; 14. Reinforcement layer; 15. Waterproof protective layer; 16. External finishing layer; 17. Embedded parts; 18. Main structure; 19. Caulking glue; 20. Class A insulation board; 21. Wall groove; 22. Support part; 23. Threaded rod; 24. L-shaped connector; 25. Thermal insulation stress pad; 26. Nut; 27. First through hole; 28. Second through hole; 29. ​​Reinforced fixing part; 30. Glue injection cavity; 31. Pouring port; 32. Abutment part. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1 To Attachment Figure 8 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] In the prior art, attaching the insulation layer to the outside of the prefabricated wall panel brings many inconveniences in actual operation, such as increasing the complexity and risk of the installation process, and easily causing cracking, falling off and other problems, thereby affecting the overall stability and aesthetics of the wall. In addition, although the traditional sandwich-type sandwich insulation wall can theoretically meet certain fire prevention and insulation requirements, it has not been widely used due to its heavy weight, high construction difficulty, and the inability of existing hoisting technology and equipment to fully support the efficient installation of such heavy walls. According to the design requirements of the current national standards GB 50016 "Code for Fire Protection Design of Buildings" and GB 55037 "General Code for Fire Protection of Buildings", when the exterior wall of a building is made of insulation materials and the walls on both sides form a cavity-free insulation material, the thickness of the non-combustible material used on the walls on both sides of the insulation material should be no less than 50mm. According to the specifications, if 50mm concrete is used as the wall surface, the weight of the outer wall is too large, which can easily cause the wall to crack after a long time. At the same time, the increase in thickness and weight makes the installation of the wall more difficult.

[0047] Embodiment 1:

[0048] The embodiment of the present invention discloses an assembled building exterior wall panel, including an exterior wall panel 1, at least one first interior panel and at least one second interior panel corresponding to the exterior wall panel 1, the inner side of the exterior wall panel 1 is fixedly connected to at least one first interior panel and at least one second interior panel, the first interior panel at least includes an inner insulation layer 3 and an inner fire wall panel 5, the second interior panel at least includes an efficient insulation layer 8, and the thickness of the second interior panel is less than the thickness of the first interior panel. Specifically, the inner insulation layer 3 can be made of efficient insulation materials such as EPS, XPS, MPR (micro foam board), PU or rock wool, A-class vacuum insulation board, aerogel board, etc. The insulation layer is placed between the exterior wall panel 1 and the inner fire wall panel 5 by bonding and clamping (no less than one engineering plastic anchor bolt is set per square meter of the inner wall to connect with the exterior wall), which completely eliminates the fire hazard of the exterior wall external insulation, effectively reduces the fire risk of the building, and enhances the thermal insulation performance of the overall wall.

[0049] According to the different floor structures, different areas of the outer wall panel 1 are fixed to the first inner panel or the second inner panel. The fixing method can be through bonding and clamping. Under the premise of ensuring adaptation to the floor structure, the thermal insulation performance can also be effectively guaranteed. The high-efficiency thermal insulation material can be made of Class A high-efficiency thermal insulation material of EPS, XPS, MPR, PU or rock wool. The outer wall panel 1 and the inner fire wall panel 5 can wrap the inner insulation layer 3 inside to achieve the effect of sandwich insulation. While providing excellent thermal insulation performance, if a fire occurs indoors, the inner fire wall panel 5 reduces the risk of combustion of the inner insulation layer 3. When a fire occurs outside the outer wall panel 1, since there is no combustible material on the outside of the wall, the fire prevention ability of the wall is greatly improved, and it has a fire prevention effect to prevent the spread of fire.

[0050] In order to further optimize the above technical solution, the outer wall panel 1 is fixedly connected to the first inner panel and the second inner panel by an adhesive layer 2. Because the first inner panel and the second inner panel are supported by the floor structure, the first inner panel and the second inner panel do not need to be fixedly connected to the outer wall panel 1 by a complicated and cumbersome connection method. Therefore, the fixed connection between the outer wall panel 1 and the first inner panel and the second inner panel can be prefabricated in the factory, or can be bonded at the construction site. In the method of bonding at the construction site, the thickness of the inner fire wall panel 5 in the first inner panel can also be adjusted according to the specific environment of the construction site. For example, when constructing a factory building, a 50mm thick inner fire wall panel 5 is used for the outer wall of the space for storing flammable materials, and a 20mm thick inner fire wall panel 5 is used for the outer wall of the ordinary space. In summary, the outer wall panel 1 and the first inner panel fixed by a simple bonding method have obvious installation convenience.

[0051] In order to further optimize the above technical solution, the outer wall panel 1 and the first inner panel are both provided with at least one through hole 7. After the outer wall panel 1 and the first inner panel are bonded, the through hole 7 of the outer wall panel 1 is connected with the through hole 7 of the first inner panel so that the threaded rod 23 can pass through. Based on this, by providing the threaded rod 23 and the connecting piece, the threaded rod 23 passes through the outer wall panel 1 and the first inner panel and is then fastened with the nut 26. The installation and fastening of the threaded rod 23 can be completed in a relatively convenient construction on site, and the stability of the connection between the outer wall panel 1 and the first inner panel can be improved on the basis of the initial fixation by bonding.

[0052] In order to further optimize the above technical solution, a staggered compartment fire protection structure 4 is provided in the inner insulation layer 3. The compartment fire protection structure 4 includes a plurality of structures composed of a first transverse plate seam and a second transverse plate seam. There are multiple curved pipe structures inside the first transverse plate seam and the second transverse plate seam, forming a smoke maze, which can effectively block or reduce the influence of high-temperature smoke on the upper inner insulation layer 3. In order to form a maze structure, one of the adjacent transverse plate seams belonging to a compartment fire protection structure 4 has a first depth and the other has a second depth; the sum of the first depth and the second depth is required to be greater than the thickness of the inner insulation board 20 between the two, so that the channel will be wound around to form a maze structure, so that a structure similar to a maze seal can be generated. The curved pipe effect of the maze structure can effectively block the spread of flames, especially for the transportation of high-temperature smoke. It has a good barrier effect and has excellent fire protection capabilities.

[0053] In order to further optimize the above technical solution, the inner fire wall panel 5 is made of at least one of concrete, silicon board, fireproof board, and gypsum board. According to the design specification requirements of the site, the thickness of the inner fire wall panel 5 can be selected between 10-50mm, and the inner fire wall panel 5 of appropriate thickness is selected according to the design population density, safety design requirements, application environment, and cost of the site. In order to provide a good fireproof effect for the inner insulation layer 3, the entire wall can provide both excellent fireproof ability and good thermal insulation effect, thereby forming a double protection and effectively isolating fire and heat transfer. Concrete, silicon board, fireproof board, gypsum board, the above materials have high fire resistance and the ability to effectively block the spread of fire; at the same time, they can improve the compression, tension and impact resistance of the wall and enhance the structural safety of the building.

[0054] Embodiment 2:

[0055] The embodiment of the present invention discloses a wall structure, including the assembled building exterior wall panel as in embodiment 1, and a floor structure; the floor structure includes a main structure 18 and a support part 22, the support part 22 is arranged on the outer end surface of the main structure 18 and is arranged in a plurality of intervals in the horizontal direction, and at least part of the assembled building exterior wall panel is supported by two adjacent support parts 22. Specifically, the support part 22 can be extended from the traditional main structure 18 to form a support, and the support part 22 can also be a steel support member and fixedly connected to the embedded part 17 in the main structure 18 to form a support protruding from the main structure 18. At least part of the upper end surface of the support part 22 supports two adjacent assembled building exterior wall panels. The outer wall panel 1 is supported by the support part 22, and the first inner side panel is supported by the support part 22 and the main structure 18, which greatly reduces the risk of falling without support, avoids the problem that the outer wall of the sandwich wall is cantilevered and cannot be substantially connected to the main structure 18, and improves the stability, safety and service life of the assembled wall structure.

[0056] In order to further optimize the above technical solution, the outer end surface of the floor structure is projected onto the inner side surface of the outer wall panel 1 to obtain a covered area and an uncovered area. The covered area of ​​the inner side surface of the outer wall panel 1 is pasted with the second inner side panel through the adhesive layer 2, and the uncovered area of ​​the inner side surface of the outer wall panel 1 is pasted with the first inner side panel through the adhesive layer 2. Preferably, a high-efficiency thermal insulation layer 8 is pasted on the outer end surface of the support portion 22, and the outer end surface of the high-efficiency thermal insulation layer 8 is flush with the outer side surface of the outer wall panel 1. The upper end surface of the support portion 22 is flush with the upper end surface of the main structure 18, and the thickness of the support portion 22 is less than the thickness of the main structure 18. Preferably, the depth of the support portion 22 from the outside to the inside is not less than 2 / 3 of the thickness of the outer wall panel 1, the width of the support portion 22 is not less than 200 mm, and the distance between two adjacent support portions 22 is not greater than 1200 mm. Preferably, the installation gaps between the upper and lower sides of the support portion 22 and the outer wall panel 1 and the second inner panel are filled with adhesive mortar 9 to form a potting treatment structure 10, so that the upper and lower sides of the support portion 22 are tightly bonded to the outer wall panel 1 and the second inner panel, and the sealing performance is improved. A-class insulation board 20 is pasted between adjacent support portions 22, and the upper and lower end surfaces of the A-class insulation board 20 are flush with the upper and lower end surfaces of the support portion 22, and the outer side surface of the A-class insulation board 20 is flush with the outer side surface of the outer wall panel 1. With such a configuration, different areas of the outer wall panel 1 can be determined to be bonded to the first inner panel or the second inner panel according to different floor structures, and the insulation performance can be effectively guaranteed while ensuring compatibility with the floor structure.

[0057] In order to further optimize the above technical solution, the outer side of the outer wall panel 1 is sequentially provided with an impermeable layer 12, a temperature-resistant strain layer 13, a reinforcement layer 14 and a waterproof protective layer 15. The impermeable layer 12 is made of waterproof mortar or polymer waterproof coating to enhance the overall waterproof performance of the wall and improve the wall's ability to resist cracking. The impermeable layer 12 uses waterproof mortar or polymer waterproof coating, which can effectively prevent moisture from penetrating and prevent the wall from getting damp and moldy. The setting of the waterproof protective layer 15 can provide a certain protective effect on the wall, extend the service life of the wall, and reduce maintenance costs. The temperature-resistant strain layer 13 mainly dissipates the stress generated by temperature changes, and at the same time can improve the wall's ability to resist cracking and waterproof. The reinforcement layer 14 is composed of glass fiber mesh cloth or other similar reinforcement materials to improve the mechanical strength and durability of the wall, as well as to improve the wall's resistance to cracking and prevent the wall surface from cracking. The reinforcement layer 14 increases the impact resistance and compressive strength of the wall, and is suitable for high-rise buildings or places requiring high strength. The reinforcing material is easy to lay and can be tightly combined with the waterproof protective layer 15 and the temperature-resistant strain layer 13 to improve construction efficiency. The reinforcing layer 14 increases the impact resistance and compressive strength of the wall facade, reduces wall cracking, prevents wall cracking, extends the service life of the wall, and achieves the purpose of building high-quality houses.

[0058] In some embodiments, an outer surface of the waterproof protective layer 15 is fixedly provided with an outer surface of the inner fire wall panel 5, and an inner surface layer 6 is fixedly provided with an outer surface of the inner fire wall panel 5. The outer surface layer and the inner surface layer 6 provide a variety of appearance options, which can meet the decoration requirements of different buildings. At the same time, the inner surface layer 6 and the outer surface layer 16 are respectively combined with the inner wall panel and the outer wall panel, and the wall decoration is completed at the same time as the wall panel is installed, which saves installation time.

[0059] In some embodiments, the high-efficiency thermal insulation layer 8 is fixedly bonded to the end surface of the support portion 22 and between the main structure 18 and the outer wall panel 1 by means of adhesive 9, and the Class A thermal insulation board 20 is installed in the cavity between two adjacent support portions 22, so that the outer wall panel 1, the high-efficiency thermal insulation layer 8, and the Class A thermal insulation board 20 are smeared to form a smooth surface; during the installation process, the gaps between the high-efficiency thermal insulation layer 8, the outer wall panel 1, the support portion 22, and the main structure 18 are filled with caulking glue 19. The caulking glue 19 filling the gaps can effectively prevent heat from being transferred through discontinuous parts (such as joints), avoid the occurrence of thermal bridge effects, and further improve the thermal insulation effect. By filling and sealing all possible gaps, the overall sealing of the building is increased.

[0060] Embodiment 3:

[0061] An embodiment of the present invention discloses a connection assembly for a thermal-bridge-free prefabricated building, including the prefabricated building exterior wall panel in Example 1 and the floor structure in Example 2, and also includes a connection assembly 11, the connection assembly 11 includes a threaded rod 23, an L-shaped connector 24, an insulating stress pad 25 and a nut 26, the L-shaped connector 24 includes a first connection part and a second connection part, the first connection part is used to connect to the building embedded part 17, one side of the second connection part is an abutment surface, the abutment surface is used to abut against the connected object, and the second connection part is provided with a first through hole 27 for the threaded rod 23 to pass through.

[0062] In order to further optimize the above technical solution, the first connection part and the second connection part are both plate-shaped, and the angle between the first connection part and the second connection part is 90 degrees. The pressure of the floor structure on the first connection part will not be transmitted to the pressure of the second connection part on the external wall panel of the matching building, thereby avoiding the risk of the external wall panel of the matching building falling off. At the same time, the threaded rod 23 is not bent, thereby avoiding the hidden dangers of breaking and loosening of the threaded rod 23 caused by the bending of the threaded rod 23 in the existing method.

[0063] In order to further optimize the above technical solution, a reinforcing fixing part 29 is provided on the opposite side of the abutting surface, and the reinforcing fixing part 29 has a glue injection cavity 30 and a pouring port 31, and the reinforcing fixing part 29 has a second through hole 28 corresponding to the first through hole 27, so that the threaded rod 23 can pass through the first through hole 27 and the second through hole 28 in sequence. Through the bonding force between the threaded rod 23 and the structural adhesive, the connection is ensured to be more firm, the possibility of the threaded rod 23 rotating is reduced, and the effect of long-term stable fixing is achieved, and the stress is made more uniform; at the same time, the reinforcing fixing part 29 can also achieve no thermal bridge, and can also play a good waterproof sealing role, preventing moisture from penetrating into the interior of the exterior wall panel, and extending the service life of the building.

[0064] Specifically, the connection position between the L-shaped connector 24 and the building embedded part 17 can be the upper end surface and / or lower end surface of the assembled building exterior wall panel. The pouring port 31 of the L-shaped connector 24 is opened on the upper end surface of the reinforcing fixing part 29 after the reinforcing fixing part 29 is fixedly connected to the embedded part 17.

[0065] In order to further optimize the above technical solution, the heat-insulating stress pad 25 is inserted into the threaded rod 23, and the heat-insulating stress pad 25 is arranged between the abutment portion 32 and the assembled building exterior wall panel. Preferably, the heat-insulating stress pad 25 is made of engineering plastic, which can reduce the heat transfer between the outdoor and the threaded rod 23 and the L-shaped connector 24, improve the overall thermal insulation performance of the assembled building exterior wall panel, and at the same time, the contact area between the abutment portion 32 of the threaded rod 23 and the assembled building exterior wall panel is expanded through the heat-insulating stress pad 25, and the pressure of the threaded rod 23 on the assembled building exterior wall panel is dispersed, the pressure is evenly distributed, and the risk of damage to the assembled building exterior wall panel is reduced.

[0066] In order to further optimize the above technical solution, a wall groove 21 is provided at one end of the assembled building exterior wall panel near the abutment portion 32, which is used to place, position and fix the threaded rod 23, and to position and match the thermal insulation stress pad 25. After the connection assembly 11 is installed, the wall groove 21 is coated and filled to make the outer side of the assembled building exterior wall panel smooth, which can eliminate stress and facilitate installation and coating.

[0067] Embodiment 4:

[0068] The embodiment of the present invention discloses a threaded rod 23 for a thermal bridge-free prefabricated building, which is used in the floor structure of Example 2. The threaded rod 23 includes a matrix and a fiber-reinforced material. The fiber-reinforced material is soaked in a resin to form a prepreg. The prepreg is wound on the matrix to obtain a preform, which is then placed in a mold for molding and thermosetting to obtain a preform. The preform is then post-processed to obtain the threaded rod 23. The threaded rod 23 made of fiber-reinforced material and resin has high strength, light weight and excellent corrosion resistance, and is suitable for various harsh environments. Compared with traditional metal rods, its low thermal conductivity can effectively eliminate cold bridges and thermal bridges, and improve building energy efficiency.

[0069] Specifically, the method for manufacturing the threaded rod 23 for thermal bridge-free prefabricated building comprises the following steps:

[0070] Step 1: Prepare Materials

[0071] Fiber reinforcement material: At least one of glass fiber, carbon fiber, basalt fiber and aramid fiber is selected as the fiber reinforcement material. The above materials all have good mechanical strength, corrosion resistance and dimensional stability.

[0072] Resin: Select suitable thermosetting resin and / or thermoplastic resin according to specific application requirements, such as at least one of polyester resin, epoxy resin, polyamide resin, urea-formaldehyde resin, phenolic resin, and polyurethane resin to ensure that it has excellent bonding and mechanical properties.

[0073] Matrix: The matrix can be made of carbon fiber, glass fiber, steel or copper to meet different product requirements. For example, for products that need to be light and have a certain strength, carbon fiber or glass fiber may be selected; while for application scenarios that require higher rigidity, steel or copper may be selected.

[0074] Step 2: Forming the prepreg

[0075] The selected fiber reinforcement material is completely impregnated with resin so that each fiber is wrapped by resin to form a uniform prepreg. This process requires that the resin is evenly distributed to avoid dry fiber phenomenon.

[0076] Step 3: Preforming

[0077] The prepreg is wound on the substrate according to a predetermined design shape to form the rod body portion of the threaded rod 23, the abutment portion 32 and the initial shape of the threaded layer to obtain a primary embryo. In this process, it is ensured that the layers are tightly combined without obvious gaps to improve the consistency and mechanical strength of the finished product.

[0078] Specifically, the amount of the prepreg wound at one end of the substrate is greater than that at the other end of the substrate, and the prepreg wound together here is arranged and arranged, and then coiled to form a preform with a bottom shape at one end, so that one end of the molded blank obtained by molding includes an abutment portion 32. The key to the steps here is the coiling technology, which rearranges and arranges the prepreg wound together into a specific direction (such as unidirectional, bidirectional or multidirectional) according to the design requirements, and uses the coiling equipment to coil, weave or wrap the excess part of the prepreg to weave the preform of the abutment portion 32. The coiling technology can accurately control the arrangement direction and density of the fibers, ensure the mechanical properties of the product, and improve the strength, rigidity and fatigue resistance of the composite material.

[0079] Step 4: Molding

[0080] The blank is placed in a pre-designed hot pressing mold and solidified under certain temperature and pressure conditions, so that the rod body part of the threaded rod 23 and the abutment part 32 can be integrally die-cast through a molding process. During the molding process, the molding temperature generally does not exceed 200 degrees, and the molding is performed under normal pressure. The key to this step is to control the temperature, time and pressure parameters to ensure the quality and performance of the product.

[0081] Step 5: Demolding and post-processing

[0082] After cooling to room temperature, the finished threaded rod 23 is taken out from the mold and subjected to necessary post-processing steps, including edge trimming, surface polishing, etc., to finally obtain a high-quality one-piece threaded rod 23.

[0083] In order to further optimize the above technical solution, after the fiber-reinforced material embryo is obtained by winding the prepreg made of one of glass fiber, carbon fiber and basalt fiber, the embryo is again wound with the aramid mesh impregnated with resin. The threaded layer is formed by hot pressing after winding with the aramid mesh impregnated with resin, which not only increases the tensile strength of the threaded rod 23, but also improves its wear resistance and corrosion resistance, can improve the heat resistance, improve the fire resistance, reduce the possibility of deformation of the threaded rod 23 when encountering high temperature, and improve the support strength and safety of the wallboard. In addition, the fiber-reinforced material is not entirely made of aramid fiber, which also reduces the comprehensive manufacturing cost of the threaded rod 23. In order to further optimize the above technical solution, the axial cross-section of the abutment portion 32 is circular, and the maximum diameter of the axial cross-section of the abutment portion 32 is greater than twice the diameter of the threaded rod 23.

[0084] Embodiment 5:

[0085] The embodiment of the present invention discloses a construction method of an assembled building exterior wall panel, which is used to construct the wall structure of embodiment 2 by using the thermal bridge-free assembled building threaded rod 23 of embodiment 4 and the thermal bridge-free assembled building connection assembly of embodiment 3. The specific steps include:

[0086] S1: The upper end surface and the lower end surface of the main structure 18 are respectively provided with embedded parts 17, and a plurality of L-shaped connecting parts 24 are respectively positioned and fixedly installed with the embedded parts 17;

[0087] S2: The outer wall panel 1 is fixedly bonded to the first inner panel and the second inner panel through the bonding layer 2 to obtain an assembled building outer wall panel, and the assembled building outer wall panel is placed at a corresponding position of the floor structure so that the support portion 22 supports the assembled building outer wall panel;

[0088] Alternatively, the outer wall panel 1 is placed at a corresponding position of the floor structure, and according to the projection of the floor structure on the outer wall panel 1, the first inner panel and the second inner panel are adhered and fixed to the corresponding area of ​​the outer wall panel 1 through the adhesive layer 2 to form an assembled building outer wall panel;

[0089] S3: Paste the Class A insulation board 20 between adjacent support parts 22;

[0090] S4: Pass the threaded rod 23 through the assembled building exterior wall panel, then pass it through the L-shaped connector 24, and fix the threaded rod 23 with a nut 26;

[0091] S5: injecting caulking glue 19 into the gaps between the assembled building exterior wall panels, the high-efficiency thermal insulation layer 8 and the main structure 18;

[0092] S6: potting treatment;

[0093] S7: sequentially cover the anti-seepage layer 12, the temperature-strain resistance layer 13, the reinforcement layer 14 and the waterproof protection layer 15 on the outer facade of the outer wall panel 1.

[0094] In order to further optimize the above technical solution, for the L-shaped connector 24 provided with a glue injection cavity 30, after the threaded rod 23 is fixed by the nut 26, the step of injecting structural glue into the glue injection cavity 30 through the pouring port 31 is also included to achieve a durable, safe and stable connection between the threaded rod 23 and the L-shaped connector 24.

[0095] This construction scheme allows the outer wall panel 1 to be pre-installed with the first inner panel and the second inner panel in the factory, and only simple splicing is required on site, which reduces the construction complexity and time and improves efficiency. It also allows the first inner panel with different thickness of the inner fire wall panel 5 to be selected for bonding and installation on the construction site based on the needs of different installation environments, which is suitable for various construction conditions. This design not only ensures the safety and functionality of the wall, but also meets the specific needs of different projects, and improves the compatibility and installation flexibility of the assembled building exterior wall panels.

[0096] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembled building exterior wall panel, characterized in that: The invention comprises an outer wall panel (1), at least one first inner panel and at least one second inner panel corresponding to the outer wall panel (1), the inner side surface of the outer wall panel (1) being fixedly connected to at least one of the first inner panel and at least one of the second inner panel, the first inner panel comprising at least an inner thermal insulation layer (3) and an inner fire wall panel (5), the second inner panel comprising at least a high-efficiency thermal insulation layer (8), and the thickness of the second inner panel being less than the thickness of the first inner panel.

2. The assembled building exterior wall panel according to claim 1, characterized in that: The outer wall panel (1) is fixedly connected to the first inner panel and the second inner panel via an adhesive layer (2).

3. The assembled building exterior wall panel according to claim 1, characterized in that: The outer wall panel (1) and the first inner panel are both provided with at least one through hole (7); after the outer wall panel (1) and the first inner panel are bonded together, the through hole (7) of the outer wall panel (1) is connected with the through hole (7) of the first inner panel to allow the threaded rod (23) to pass through.

4. The assembled building exterior wall panel according to claim 1, characterized in that: The inner thermal insulation layer (3) is provided with a staggered compartment fire protection structure (4).

5. A wall structure, characterized in that: It comprises an assembled building exterior wall panel as described in any one of claims 1 to 4, and a floor structure; the floor structure comprises a main structure (18) and a support portion (22), wherein the support portion (22) is arranged on the outer end surface of the main structure and is arranged in multiple numbers at intervals in the horizontal direction, at least part of the assembled building exterior wall panel is supported by two adjacent support portions (22), and the support portion (22) is a steel support member fixedly connected to the embedded part (17) of the main structure (18) and / or is integrally formed with the main structure (18).

6. A wall structure according to claim 5, characterized in that: At least part of the upper end surface of the support portion (22) supports two adjacent assembled building exterior wall panels.

7. A wall structure according to claim 6, characterized in that: The outer end surface of the floor structure is projected onto the inner side surface of the outer wall panel (1) to obtain a covered area and an uncovered area. The covered area of ​​the inner side surface of the outer wall panel (1) is adhered to the second inner side panel via an adhesive layer (2), and the uncovered area of ​​the inner side surface of the outer wall panel (1) is adhered to the first inner side panel via an adhesive layer (2).

8. A wall structure according to claim 7, characterized in that: A high-efficiency thermal insulation layer (8) is adhered to the outer end surface of the support portion (22), and the outer end surface of the high-efficiency thermal insulation layer (8) is flush with the outer side surface of the outer wall panel (1).

9. A wall structure according to claim 5, characterized in that: The upper end surface of the support portion (22) is flush with the upper end surface of the main structure (18), and the thickness of the support portion (22) is smaller than the thickness of the main structure (18).

10. A wall structure according to claim 9, characterized in that: A-grade insulation boards (20) are pasted between adjacent support portions (22); the upper end surface and the lower end surface of the A-grade insulation board (20) are flush with the upper end surface and the lower end surface of the support portion (22); and the outer side surface of the A-grade insulation board (20) is flush with the outer side surface of the outer wall panel (1).

11. A wall structure according to claim 5, characterized in that: The invention comprises a connection assembly (11), wherein the connection assembly (11) comprises a threaded rod (23), an L-shaped connection piece (24), a heat-insulating stress pad (25) and a nut (26); one end face of the L-shaped connection piece (24) is fixedly connected to an embedded part (17) of the wall panel structure; the other end face of the L-shaped connection piece (24) abuts against the inner side face of the assembled building exterior wall panel; the threaded rod (23) passes through the heat-insulating stress pad (25), the assembled building exterior wall panel and the L-shaped connection piece (24) in sequence and is then fixedly connected to the nut (26).

12. A construction method for assembled building exterior wall panels, characterized in that: For a wall structure as claimed in claim 11, S1: The upper end surface and the lower end surface of the main structure (18) are respectively provided with embedded parts (17), and a plurality of L-shaped connecting parts (24) are respectively positioned and fixedly installed on the embedded parts (17); S2: The outer wall panel (1) is fixedly bonded to the first inner panel and the second inner panel via the bonding layer (2) to obtain the assembled building outer wall panel, and the assembled building outer wall panel is placed at a corresponding position of the floor structure so that the support portion (22) supports the assembled building outer wall panel; Alternatively, the outer wall panel (1) is placed at a corresponding position of the floor structure, and according to the projection of the floor structure on the outer wall panel (1), the first inner panel and the second inner panel are adhered and fixed to corresponding areas of the outer wall panel (1) through the adhesive layer (2), so as to form the assembled building outer wall panel and wall structure; S3: pasting the Class A insulation board (20) between adjacent support parts (22); S4: passing the threaded rod (23) through the assembled building exterior wall panel, and then passing it through the L-shaped connector (24), and fixing the threaded rod (23) by means of the nut (26); S5: injecting a caulking glue (19) into the gaps between the assembled building exterior wall panel, the high-efficiency thermal insulation layer (8) and the main structure (18); S6: potting treatment; S7: sequentially covering the anti-seepage layer (12), the anti-temperature strain layer (13), the reinforcement layer (14) and the waterproof protection layer (15) on the outer facade of the outer wall panel (1).

13. The construction method of the assembled building exterior wall panel according to claim 12, characterized in that: The L-shaped connecting member (24) comprises a first connecting portion and a second connecting portion, wherein the first connecting portion is used to connect with the embedded member (17), one side surface of the second connecting portion is an abutting surface, and the abutting surface is used to abut with the assembled building exterior wall panel, the second connecting portion is provided with a first through hole (27) for the threaded rod (23) to pass through, and a reinforcing fixing portion (29) is provided on the opposite side of the abutting surface, the reinforcing fixing portion (29) has a glue injection cavity (30) inside and a pouring port (31), and the reinforcing fixing portion (29) is provided with a second through hole (28) corresponding to the first through hole (27), so that the threaded rod (23) can pass through the first through hole (27) and the second through hole (28) in sequence; After the threaded rod (23) is fixed by the nut (26), the method further comprises the step of injecting structural glue into the glue injection cavity (30) through the pouring port (31) for solidification.

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