Prefabricated steel structure facade module for energy-saving fabricated building

Abstract

The invention discloses a prefabricated steel structure facade module for an energy-saving fabricated building, and belongs to the technical field of fabricated buildings. The facade module comprises at least one bent plate, a plurality of transverse purlins and a plurality of functional layers. The section of the bent plate is of a C-like structure, and an open cavity is formed in the bent plate. The two ends of the transverse purlins are in bolted connection with the two end faces of the bent plate through the heat insulation cushion blocks correspondingly, and the multiple transverse purlins are arranged in the length direction of the bent plate. The functional layer comprises a vapor barrier layer, a heat preservation layer and a waterproof breathable layer. And the functional layer is fixedly mounted on one side of the bent plate. The vapor-proof layer is attached to the inner side of the open cavity, the heat preservation layer is laid on the outer side of the vapor-proof layer in a staggered mode, and the waterproof breathable layer is attached to the outer side of the heat preservation layer. The facade module is reasonable in design, simple in structure, convenient to machine, low in manufacturing cost and excellent in energy-saving effect, and the functional characteristics of the facade cannot be affected.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated building technology, specifically relating to a prefabricated steel structure facade module for energy-saving prefabricated buildings. Background Technology

[0002] Prefabricated construction involves manufacturing and assembling a large number of building components in a factory before transporting them to the construction site for assembly. By shifting much of the work to factories, prefabricated construction significantly reduces the amount and intensity of labor during construction and drastically shortens the construction period. Furthermore, it helps conserve energy, reduce construction waste, and minimize other environmental pollution. Compared to traditional construction, it offers significant advantages in energy conservation and environmental protection.

[0003] Building components used in prefabricated construction can be categorized into walls, floors, columns, roofs, and stairs, depending on the building's location. Among these, facade structures, represented by walls, are one of the most frequently used building components in prefabricated construction. As a primary building component, walls serve to support and divide space. Furthermore, while ensuring the convenience of prefabricated construction, wall components are also fundamental components that guarantee various functionalities of the building, such as thermal insulation and soundproofing.

[0004] In recent years, with the continuous development of prefabricated building technology, more and more prefabricated wall technologies have come into the view of construction professionals. Although the forms and functions of prefabricated buildings are becoming increasingly diversified, many technologies exhibit structural complexity, with an increasing number of parts and a growing use of non-standard components. Furthermore, the building components themselves are employing increasingly specialized structures, undoubtedly significantly increasing manufacturing costs and, to some extent, narrowing their applicability and reducing their versatility. For example, existing technology CN 120026712A discloses a prefabricated detachable wall. To facilitate installation and disassembly, this wall includes a support frame, main end bases, rotating rods, and supporting airbags. It utilizes not only gears, screws, sliding rods, and telescopic rods, but also a large number of components not commonly used in the construction field, such as pistons and air pumps, significantly increasing the overall structural complexity of the wall. While these complex structures installed within the wall components play a role in the assembly and disassembly process, they may affect the function of the wall itself. For example, it can affect the laying of functional layers such as insulation and sound absorption layers; it can create a large number of thermal bridges, reduce the building's insulation effect, and lead to a decline in energy-saving performance.

[0005] For example, existing patent CN120401696A discloses an energy-saving prefabricated building wall and its assembly method. To achieve precision in the installation process, a complex angle adjustment mechanism is used inside the wall. While this facilitates building assembly, it significantly increases manufacturing costs, and this complex, low-frequency non-functional structure greatly reduces the economic viability of prefabricated buildings.

[0006] For example, existing technology CN219992813U discloses a prefabricated building decoration wall. This wall has end grooves at one end, with a connecting mechanism on the bottom surface of the end grooves, and a positioning mechanism at the end furthest from the end grooves. The positioning mechanism includes a positioning post with a locking groove at its center and a limiting groove on its surface. Although the wall has good overall structural integrity, the numerous locking grooves, sliding grooves, and positioning posts at the joints undoubtedly increase the number of manufacturing steps, raising the manufacturing difficulty and cost.

[0007] Furthermore, many prefabricated steel structures use interlocking connections between adjacent components, with the joints being surface or line connections between metal parts. Due to thermal expansion and contraction, these metal components will experience slight shrinkage or expansion, leading to friction between parts and causing structural noise. This structural noise undoubtedly increases the noise level of the steel structure building itself and significantly reduces the user experience, creating a sense of insecurity. Prolonged structural noise can even lead to potential building safety issues. Summary of the Invention

[0008] (a) Technical problems to be solved

[0009] This invention aims to solve one of the following technical problems existing in the prior art or related technologies:

[0010] Existing prefabricated building facade structures suffer from problems such as complex structures, numerous parts, and heterogeneous features, leading to high manufacturing costs, affecting the functionality of facade components, and numerous structural noises caused by thermal expansion and contraction in steel structure buildings.

[0011] (II) Technical Solution

[0012] To solve the above-mentioned technical problems, the present invention provides a prefabricated steel structure facade module for energy-saving prefabricated buildings, and the specific technical solution adopted is as follows:

[0013] A prefabricated steel structure facade module for energy-saving prefabricated buildings, the facade module including at least one bent plate 1, multiple purlins 2, and functional layers;

[0014] The bending plate 1 has a flat back surface 1-1 along its length. The two sides of the back surface 1-1 are bent perpendicularly in the same direction to form side surfaces 1-2. The ends of the two side surfaces 1-2 are bent towards each other to form non-contact end surfaces 1-3 parallel to the back surface 1-1. The back surface 1-1, side surfaces 1-2 and end surfaces 1-3 enclose an open cavity 1-5.

[0015] The purlin 2 is bolted to the two end faces 1-3 of the bending plate 1 at both ends by heat insulation pads; multiple purlins 2 are arranged along the length of the bending plate 1.

[0016] The functional layer includes at least an insulation layer 7 and a waterproof and breathable layer; the insulation layer 7 is located on the side of the bent plate 1 facing outwards from the building; the waterproof and breathable layer is located on the outside of the insulation layer 7.

[0017] Preferably, the facade module includes multiple bent plates 1 and at least one vertical purlin 3; the multiple bent plates 1 are arranged side by side with gaps; the sides 1-2 of adjacent bent plates 1 are connected by bolts, and a gasket 1-3 is provided in the gap between the two sides 1-2; foam 13, foam 14 and sealant 15 are provided in the gap;

[0018] The vertical purlin 3 is vertically bolted to the outside of the horizontal purlin 2 by heat insulation pads, and the outer side of the insulation layer 7 is flush with or covers the outer side of the vertical purlin 3.

[0019] More preferably, the expanding foam 13 is located in the middle of the gap, the foam 14 is located outside the expanding foam 13, and the sealant 15 is located outside the foam 14.

[0020] Preferably, the purlin 2 is installed on the inner or outer side of the open cavity 1-5.

[0021] More preferably, when the purlin 2 is installed inside the open cavity 1-5, there is a gap between the two end faces of the purlin 2 and the inner wall of the side surface 1-2 of the bent plate 1, and the insulation layer 7 fills the gap.

[0022] More preferably, when the purlin 2 is installed on the outside of the open cavity 1-5, the two end faces of the purlin 2 are flush with the two outer walls of the facade module after the insulation layer 7 is wrapped around it.

[0023] Preferably, the facade module further includes an outer purlin 4 and / or an inner purlin 8; the outer purlin 4 and the inner purlin 8 are respectively vertically installed on the outdoor side and the indoor side of the facade module; the outer purlin 4 is vertically bolted to the vertical purlin 3; the inner purlin 8 is fixedly connected to the back side 1-1 of the bent plate 1.

[0024] More preferably, the facade module further includes an inner decorative panel 10 and / or an outer decorative panel 11; the inner decorative panel 10 is connected to the inner purlin 8, and the outer decorative panel 11 is connected to the outer purlin 4.

[0025] Preferably, the functional layer further includes a sound-absorbing layer 17; the sound-absorbing layer 17 is disposed inside the open cavity 1-5, and the heat insulation layer 7 is disposed outside the sound-absorbing layer 17; sound-absorbing holes 1-6 are provided on the back side 1-1 of the bent plate 1 on which the sound-absorbing layer 17 is installed.

[0026] More preferably, the facade module further includes a sound-absorbing layer fixing rod 18 and a support plate 16; one side of the sound-absorbing layer fixing rod 18 is provided with a disc perpendicular to the rod axis for pressing the sound-absorbing layer 17, and the other side is bolted to the end face 1-3 of the purlin 2 or the bent plate 1; the support plate 16 is disposed between adjacent purlins 2 and connected to the purlins 2 to form the bottom surface that supports the insulation layer 7.

[0027] Preferably, the functional layer further includes a vapor barrier layer; the vapor barrier layer is attached to the inner side of the open cavity 1-5; the thermal insulation layer 7 is laid alternately on the outer side of the vapor barrier layer.

[0028] Preferably, the horizontal purlin 2 and the vertical purlin 3 are Z-shaped purlins; the outer purlin 4 is a Z-shaped purlin, a Z-shaped purlin, a C-shaped purlin, an angle steel or a square steel; the bent plate 1 has through holes at the bolting parts, and rivet bolts are pre-installed in the through holes.

[0029] (III) Beneficial Effects

[0030] Compared with the prior art, the beneficial effects obtained by the present invention are as follows:

[0031] I. The facade module of this invention has a reasonable design, simple structure, convenient processing, low manufacturing cost, and does not affect the functional characteristics of the facade itself. The main body of the facade module adopts a bent plate with an open cavity, which can be basically formed by bending or rolling the metal plate several times. At the same time, the horizontal and vertical purlins in the facade module can adopt a Z-shaped structure, which is very convenient to manufacture and process. Moreover, the connection of the facade module is mainly bolted, and there is basically no need to manufacture special connection structures or functional structures. In addition, the open cavity formed by the bent plate can be used to lay functional layers such as thermal insulation layer, sound insulation layer, and waterproof layer. The facade module is not only easy to install, but also has a simple and beautiful appearance, strong integrity, and does not affect the functionality required as a wall or other building facade structure.

[0032] II. The facade module of this invention exhibits excellent thermal insulation performance and significant energy-saving effects, contributing to ultra-low energy consumption or even zero energy consumption in buildings. An insulation layer is laid inside or outside the open cavity of the bent plate on the exterior side of the facade module to maintain building temperature and reduce heat loss from the building interior. Insulation pads are installed at the connections between vertical and horizontal purlins, and at the end faces of the horizontal purlins and bent plates, to avoid linear thermal bridges and prevent direct contact between external cold air and internal hot air, thus reducing condensation. Sufficient space is reserved at the bolts connecting the insulation pads to fill with insulation material, thereby interrupting the heat transfer through point thermal bridges, thus creating a thermal break in the facade module and preventing cold air condensation.

[0033] Third, the main body of the facade module of this invention adopts a bent plate with parallel sides, and adjacent bent plates are directly connected by bolts and expanding foam. Thus, the lateral connection of the bent plates changes from the existing snap-fit ​​surface or line connection to a point connection. A gasket is also provided between the sides of adjacent bent plates, which can effectively improve the structural strength at the point connection. At the same time, the expanding foam layer covering the gasket and the bolt in the gap can effectively reduce structural noise at the bolt-gasket connection. Furthermore, the bolts passing through the sides of adjacent bent plates are also wrapped with a thermal insulation layer or a sound-absorbing layer, which also effectively reduces structural noise at the bolt-nut connection. Correspondingly, where heat-insulating pads are provided at the connections between purlins and vertical purlins, and between purlins and bent plates, the direct contact area of ​​the metal parts can be reduced, thus reducing structural noise caused by thermal expansion and contraction of the steel structure itself.

[0034] Fourth, the facade modules of this invention are highly flexible and can be adapted to different sizes according to transportation requirements, thus enabling long-distance transportation via containers and other transport carriers. Furthermore, adjustments can be made based on assembly plans, construction conditions, and other factors. For example, dedicated connection anchor points can be pre-set or adjusted on a specific module according to decoration requirements. Alternatively, components such as ventilation ducts, water pipes, cables, energy storage batteries, or switches and sockets can be directly pre-set inside or outside the open cavity of the bent plate of one or more specific facade modules (switch and socket), facilitating building decoration.

[0035] Fifth, the facade module structure of the present invention is stable, durable, and has good thermal insulation effect. Buildings constructed with this facade module have good durability, long service life, low overall cost, and are very convenient to install, dismantle and recycle. Attached Figure Description

[0036] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0037] Figure 1 The diagram schematically shows a front view of the facade module frame in a preferred embodiment of the present invention.

[0038] Figure 2 for Figure 1 A magnified view of the area indicated by circle A in the middle.

[0039] Figure 3 A cross-sectional view of a facade module bending plate in a preferred embodiment of the present invention is shown schematically.

[0040] Figure 4 A top view of the facade module in Embodiment 1 of the present invention is shown schematically.

[0041] Figure 5 for Figure 4 A magnified view of the portion shown in box B.

[0042] Figure 6 A top view of the facade module in Embodiment 2 of the present invention is shown schematically.

[0043] Figure 7 for Figure 6 A magnified view of the area indicated by circle C in the middle.

[0044] Figure 8 A top view of the facade module in Embodiment 3 of the present invention is shown schematically.

[0045] Figure 9 The diagram schematically shows a top view of the facade module in Embodiment 4 of the present invention (the insulation layer of the corresponding part of the two right-side bent plates is omitted).

[0046] The reference numerals used in the above figures are as follows:

[0047] 1. Bending plate; 2. Horizontal purlin; 3. Vertical purlin; 4. Outer purlin; 5. Thermal insulation pad I; 6. Thermal insulation pad II; 7. Insulation layer; 8. Inner purlin; 9. Connector; 10. Inner decorative panel; 11. Outer decorative panel; 12. Gasket; 13. Expanding foam; 14. Foam; 15. Sealant; 16. Support plate; 17. Sound-absorbing layer; 18. Sound-absorbing layer fixing rod; 19. Sound-absorbing and dustproof layer;

[0048] 1-1, Back side; 1-2, Side side; 1-3, End face; 1-4, Fold-back section; 1-5, Open cavity; 1-6, Sound absorption hole. Detailed Implementation

[0049] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented by a variety of different embodiments as defined and covered by the claims.

[0050] In the following description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and "vertical" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0051] In the following description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In addition, in the following description of the present invention, unless otherwise stated, the meanings of "multiple", "multiple groups", and "multiple roots" are two or more.

[0053] Figure 1 The front view of the facade module frame in a preferred embodiment of the present invention is schematically shown. Figure 2 For Figure 1 The partial enlarged view of the part shown by the circle A in the figure. From Figure 1 and Figure 2 It can be seen that in this preferred embodiment, the facade module is provided with three bending plates 1 arranged side by side longitudinally, one of which has a smaller width, and the other two have the same and relatively larger widths. The width of the facade module can be adjusted according to transportation conditions, building characteristics, etc. In the upper, middle, and lower parts of each bending plate 1, a horizontal purlin 2 is provided, and the horizontal purlins 2 at the same position of different bending plates 1 are on the same straight line. The two ends of the horizontal purlin 2 are respectively connected to both sides of the bending plate 1, thus forming a relatively stable box structure.

[0054] On the outside of the horizontal purlin 2 along the length direction of the bending plate 1, a vertical purlin 3 perpendicular to the three horizontal purlins 2 is provided, thereby connecting the three horizontal purlins 2 into one body and further increasing the structural stability. Both the horizontal purlin 2 and the vertical purlin 3 are U-shaped purlins with a U-shaped cross-section. Among them, the horizontal purlin 2 can be bolted to the bending plate 1 through the two flanges or the top surface in the middle of the preset through holes. The connection between the horizontal purlin 2 and the vertical purlin 3 is made in a way that the bottom surfaces of the flanges face each other, which can increase the connection area.

[0055] Four outer purlins 4 are transversely arranged on the outside of the vertical purlin 3. The outer purlins 4 are in two groups, and are respectively fixed to the upper and lower parts of the facade module. The outer purlin 4 adopts a Z-shaped purlin with a cross-section composed of two horizontal planes and one vertical plane. One horizontal plane is bolted to the outer side surface of the vertical purlin 3, and the other horizontal plane is used to install the decorative board or specific building components outside the building.

[0056] From Figure 2It is known that heat insulation pads are provided at the connection points between the horizontal purlin 2 and the bent plate 1, and at the connection points between the horizontal purlin 2 and the vertical purlin 3, namely, elongated heat insulation pad II 6 and square heat insulation pad I 5. Meanwhile, the length of the horizontal purlin 2 is less than the width between the inner walls on both sides of the bent plate 1, thus creating gaps between the inner wall of the bent plate 1 and the end face of the horizontal purlin 2 at the connection points. In actual use, an insulation layer is laid in the frame of the facade module, covering the gaps mentioned above and the outer side of the horizontal purlin 2. This installation avoids linear thermal bridges; when cold air from the outside is transferred into the module through the vertical purlin 3, there are only points (i.e., connecting bolts) at the heat insulation pads where cold air is transferred inwards. Because the lateral transmission of cold air attenuates rapidly, the insulation layer in the gaps on both sides of the vertical purlin 3 and the end face of the horizontal purlin 2 can effectively block the extension of cold air inwards. Meanwhile, the insulation layer installed inside the purlin 2 can also cut off the longitudinal transmission of cold air to the module facade, thereby achieving complete isolation of cold air, avoiding the existence of thermal bridge structure, and thus improving the overall energy-saving effect of the building.

[0057] Regarding the installation of thermal insulation pads, to reduce the number of parts and improve installation efficiency, dedicated thermal insulation pads can be used. For example, rectangular or square thermal insulation pads can be used at the junction of purlin 2 and vertical purlin 3, and long strip pads can be used at the connection between the end faces 1-3 of purlin 2 and bent plate 1. Alternatively, for the sake of parts standardization, universal thermal insulation pads can be used, for example, all long strip pads, installed by splicing at the junction of purlin 2 and vertical purlin 3. For flexibility in adapting to installation conditions, multiple pads can also be stacked to achieve a suitable thickness.

[0058] Figure 3 A schematic cross-sectional view of a facade module bending plate according to a preferred embodiment of the present invention is shown. From Figure 3 As can be seen, in this preferred embodiment, the cross-section of the bending plate 1 is similar to a П-shaped structure, with both sides of the back surface 1-1 bent perpendicularly in the same direction to form side surfaces 1-2. The ends of the side surfaces 1-2 are bent perpendicularly towards each other to form non-contacting end faces 1-3, thus forming a rectangular open cavity 1-5 for the bending plate 1 as a whole, facilitating the installation of various functional layers or other functional components. Simultaneously, a folded portion 1-4 extending towards the back surface 1-1 can be provided at the end of the end face 1-3 to restrict the position of the heat insulation pad II 6. Furthermore, since the bending plate needs to be connected to components such as the outer purlin 4 and inner purlin 8, through holes are opened at the connection points, or rivet bolts are installed in the through holes to facilitate connection.

[0059] Example 1

[0060] from Figure 3 As can be seen, in this embodiment, the facade module adopts a similar design to... Figure 1 and Figure 2 The frame structure shown is adopted in accordance with... Figure 3The same bent plate 1. With Figure 1 The difference lies in that, on the side of the facade module facing the interior of the building, at least one inner purlin 8 is fixedly connected by rivet bolts. The inner purlin 8 is then connected to the interior decorative panel 10 via a connector 9. The connector 9 can employ the padding structure disclosed in the applicant's prior patent application CN208763262U, or other existing connectors for fixed connection to the interior decorative panel 10. This is not the focus of this invention and will not be elaborated further.

[0061] To ensure the building's thermal insulation performance, an insulation layer 7 is installed both inside and outside the open cavities 1-5 of the bent plate 1. The outer surface of the insulation layer 7 located outside the open cavities 1-5 is flush with the outer surface of the vertical purlins 3. Simultaneously, at least one waterproof and breathable membrane (not shown) is attached to the outermost layer of the insulation layer 7 to prevent outside air from entering. For increased protection, a protective plate can be installed outside the waterproof and breathable membrane using the vertical purlins 3. At least one vapor barrier membrane (not shown) is also attached to the inner wall of the open cavities 1-5 of the bent plate 1 to prevent hot indoor air from entering the insulation layer 7. Thus, although cold outside air can be transferred into the building through the metal vertical purlins 3, the presence of the insulation pads prevents point thermal bridges from forming at most at the connection points between the horizontal purlins 2 and vertical purlins 3 (or between the bent plate 1 and horizontal purlins 2). In fact, due to the presence of internal vapor barrier membranes, internal insulation layers, and other structures, cold air is cut off at the insulation pad and cannot be further transmitted into the building, forming a broken bridge structure in which cold air cannot be transmitted inward.

[0062] from Figure 5 It is known that at the connection of the two bent plates 1 of the facade module, they are rigidly connected by bolts passing through the sides 1-2 of the two adjacent bent plates 1. There is a gap between the two adjacent sides 1-2, and a washer 12 installed on the aforementioned bolts is provided in the gap. The washer 12 can increase the stability of the connection and also control the width of the gap. In the gap, in addition to the bolt connection, there are also expanding foam 13, foam 14 and sealant 15. Among them, expanding foam 13 is located in the middle, covering the bolts passing through the adjacent bent plates 1 and the washer on the bolts, foam 14 is located on the outside of expanding foam 13, and sealant 15 is located on the outside of foam 14. Sealant 15 must be provided on the indoor side of the facade module, while on the outdoor side, due to the presence of other functional layers, it can be provided as appropriate. Filling the gap with expanding foam 13, foam 14 and sealant 15 can isolate the indoor and outdoor hot and cold air, and also serve as a buffer layer to prevent deformation of adjacent bent plates and structural noise caused by thermal expansion and contraction. Furthermore, the gaps prevent direct contact between the metal bending plates, which facilitates the transmission of weaker noise. Meanwhile, the inner purlin 8 and the back 1-1 of the bending plate 1 are connected using waterproof and vapor-proof rivets, preventing hot indoor air from entering the interior of the facade module through the connection.

[0063] Example 2

[0064] from Figure 6 As can be seen, in this embodiment, the frame structure of the facade module is similar to... Figure 1 The basic structure is the same as in Embodiment 1, but the functional layer arrangement is different from that in Embodiment 1. The main difference is the addition of a sound-absorbing layer 17. Since the sound-absorbing layer 17 needs to have a cavity to achieve better sound insulation, a sound insulation layer is set on the inner side of the back 1-1 of the bent plate 1, and a cavity is formed in the area within the purlin 2.

[0065] To secure the sound insulation layer 17, a sound absorption layer fixing rod 18 is also provided. The sound absorption layer fixing rod 18 mainly consists of a disc for pressing down on the sound absorption layer 17 and a screw rod that is perpendicularly connected to the disc's axis. The screw rod passes through a rivet nut on the crossbeam 2 and is locked to the rivet nut on the inner purlin 2 via a nut on the outside, thereby securing the sound absorption layer 17 and preventing it from falling off during long-term use.

[0066] To accommodate the sound-absorbing layer 17, the position of the insulation layer 7 is adjusted and mainly located on the outer side of the purlin 2. Since the purlin 2 is discontinuous along the length of the bent plate 1, support plates 16 are still present between adjacent purlins 2 to support the insulation layer 7. The support plates 16 and the purlin 2 together form a load-bearing structure for installing the insulation layer 7. Furthermore, the outer purlin 4 is connected to the outer decorative panel 11 via connectors 9.

[0067] from Figure 6 As can be seen, to improve the sound absorption effect, multiple sound-absorbing holes 1-6 are provided on the back side 1-1 of the bent plate 1. Simultaneously, to reduce dust entering the interior of the bent plate 1 through the sound-absorbing holes 1-6, at least one layer of sound-absorbing and dust-proof layer 19 is attached to the inner wall of the bent plate 1-1. Correspondingly, a vapor barrier (not shown) is provided on the outer side of the support plate 16 and the inner purlin 2 to prevent internal moisture from penetrating the vapor barrier and entering the insulation layer 7.

[0068] Example 3

[0069] from Figure 8 It can be seen that the structure adopted by the facade module in this embodiment is similar to... Figure 6 The two are basically the same. The difference is that the purlin 2 is set on the outside of the end face 1-3 of the bent plate 1. Therefore, the open cavity 1-5 of the bent plate 1 is mainly used to install the sound insulation layer 17 and to provide sufficient cavity for the sound insulation layer 17.

[0070] Example 4

[0071] from Figure 9As can be seen, the facade module of this embodiment also sets the purlin 2 on the outer side of the end face 1-3 of the bent plate 1. However, unlike other embodiments, this embodiment uses a single long purlin 2 to connect the three bent plates 1, which further increases the connection strength between different bent plates 1, while reducing the number of purlins 2 and the operation steps.

[0072] The manufacturing and construction process of the aforementioned prefabricated steel structure facade modules is as follows:

[0073] 1. Based on the specific design and construction requirements of the building, determine the specific dimensions of the facade modules, as well as the dimensions of components such as bent plates and the connection points of the pre-set connection structures, and then fabricate the bent plates.

[0074] 2. As needed, attach functional layers that cannot be further processed, such as waterproof and vapor-barrier layers, inside the bent panels. Then install horizontal and vertical purlins to form independent frame structures based on the bent panels. To connect adjacent independent frame structures, first, apply foam adhesive to the required area, then attach foam around the edge of that area; next, insert gaskets and bolts; after all bolts are inserted and tightened, apply expanding foam; finally, after the expanding foam has solidified, apply sealant to the outside of the foam. Once all independent frame structures are connected, the main frame structure is formed.

[0075] 3. Depending on the specific circumstances, install remaining functional layers into the main frame structure, such as insulation layers, sound-absorbing layers, etc. Depending on the specific circumstances, reserve cavity structures within the main frame, and install the necessary pipes, wiring, and other structures within the cavities in advance according to design and construction requirements. If the bent plates at the edges of the facade modules need to be connected to bent plates of other facade modules later, reserve installation space within the inner cavity of the bent plate's side, depending on the actual situation.

[0076] Fourth, seal the insulation layer with a waterproof and breathable layer, and install external purlins or external decorative panels on the outermost side of the waterproof and breathable layer according to actual needs; then install internal purlins and internal decorative panels and other components according to actual needs. After the building facade modules are manufactured, they are packaged and transported to the construction site.

[0077] 5. At the construction site, after removing the packaging, the facade modules are hoisted to the designated positions and secured before being assembled. Adjacent facade modules can be secured with bolts within the pre-reserved installation space. Foam and expanding foam are then added between the sides of adjacent facade modules, and finally, a layer of sealant is applied. After the adjacent facade modules are connected, any missing structural elements, such as insulation layers, are filled into the pre-reserved installation space to form a complete building facade structure. Finally, the building's floor slabs, roof, partition walls, and doors and windows are installed.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pre-assembled steel structure facade module for energy efficient fabricated buildings, characterized by, It comprises at least one bent plate (1), a plurality of horizontal purlins (2), and a functional layer. The bent plate (1) is provided with a straight back (1-1) along the length direction, and the back (1-1) is vertically bent on both sides to form side faces (1-2), and the end faces of the two side faces (1-2) are bent towards each other to form a non-contact end face (1-3) parallel to the back (1-1); the back (1-1), the side faces (1-2), and the end face (1-3) form an open cavity (1-5). The horizontal purlin (2) is bolted to the two end faces (1-3) of the bent plate (1) through thermal insulation pads at both ends; a plurality of horizontal purlins (2) are arranged along the length direction of the bent plate (1). The functional layer comprises at least a thermal insulation layer (7) and a waterproof and breathable layer; the thermal insulation layer (7) is arranged on the side of the bent plate (1) facing the building outside; and the waterproof and breathable layer is arranged on the outside of the thermal insulation layer (7).

2. A pre-assembled steel structural facade module for an energy efficient fabricated building according to claim 1, characterized in that, It comprises a plurality of bent plates (1) and at least one vertical purlin (3); the plurality of bent plates (1) are arranged side by side with gaps; the side faces (1-2) of adjacent bent plates (1) are connected by bolts, and a gasket (1-3) is arranged in the gap between the two side faces (1-2); foaming glue (13), foam (14), and sealing glue (15) are arranged in the gap. The vertical purlin (3) is vertically bolted to the outside of the horizontal purlin (2) through a thermal insulation pad, and the outer side of the thermal insulation layer (7) is flush with the vertical purlin (3) or covers the outer side of the vertical purlin (3).

3. A pre-engineered steel structural facade module for an energy efficient fabricated building according to claim 1, characterized in that, The horizontal purlin (2) is installed on the inside or outside of the open cavity (1-5).

4. A pre-assembled steel structural facade module for an energy efficient fabricated building according to claim 3, characterized in that, When the horizontal purlin (2) is installed on the inside of the open cavity (1-5), there is a gap between the end faces of the horizontal purlin (2) and the inner walls of the side faces (1-2) of the bent plate (1), and the thermal insulation layer (7) is filled in the gap.

5. A pre-engineered steel structural facade module for an energy efficient fabricated building according to claim 3, characterized in that, When the horizontal purlin (2) is installed on the outside of the open cavity (1-5), the end faces of the horizontal purlin (2) are flush with the two outer walls of the facade module after wrapping the thermal insulation layer (7).

6. A pre-engineered steel structural facade module for an energy efficient fabricated building according to claim 1, characterized in that, It further comprises an outer purlin (4) and / or an inner purlin (8); the outer purlin (4) and the inner purlin (8) are vertically installed on the outside and the inside of the facade module, respectively; the outer purlin (4) is vertically bolted to the vertical purlin (3); and the inner purlin (8) is fixedly connected to the back (1-1) of the bent plate (1).

7. A pre-assembled steel structural facade module for an energy efficient fabricated building according to claim 6, characterized in that, It further comprises an inner decorative plate (10) and / or an outer decorative plate (11); the inner decorative plate (10) is connected to the inner purlin (8), and the outer decorative plate (11) is connected to the outer purlin (4).

8. A pre-engineered steel structural facade module for an energy efficient fabricated building according to claim 1, characterized in that, The functional layer further comprises a sound-absorbing layer (17); the sound-absorbing layer (17) is arranged inside the open cavity (1-5), and the thermal insulation layer (7) is arranged on the outside of the sound-absorbing layer (17); the back (1-1) of the bent plate (1) on which the sound-absorbing layer (17) is installed is provided with sound-absorbing holes (1-6).

9. A pre-assembled steel structure facade module for an energy efficient fabricated building according to claim 8, characterized in that, It further comprises a sound-absorbing layer fixing rod (18) and a support plate (16); one side of the sound-absorbing layer fixing rod (18) is provided with a disc perpendicular to the axial direction of the rod shaft, used for pressing the sound-absorbing layer (17), and the other side is bolted and fixed to the end face (1-3) of the horizontal purlin (2) or the bent plate (1); the support plate (16) is arranged between adjacent horizontal purlins (2) and connected to the horizontal purlins (2) to form a bottom surface supporting the thermal insulation layer (7).

10. A pre-engineered steel structural facade module for an energy efficient fabricated building according to any one of claims 1, wherein, The functional layer further comprises a vapor barrier layer; the vapor barrier layer is attached to the inner side of the open cavity (1-5); and the thermal insulation layer (7) is staggered and laid on the outer side of the vapor barrier layer.

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