An assembly unit and structural system concealed dry mechanical connection device

Abstract

This utility model provides a concealed dry mechanical connection device for assembly units and structural systems, including a steel keel. The steel keel is fixed to the structural system and embedded in the composite exterior wall panel in the assembly unit. This structure can hide the steel keel inside the composite exterior wall panel, and will not cause the risk of exposed components requiring further treatment for the interior space. This ensures the integrity and purity of the interior space. At the same time, since the composite exterior wall panel is connected to the structural system indirectly, if the composite exterior wall panel needs to be replaced, it will have less impact on the stability of the structural system.

Description

Technical Field

[0001] This utility model belongs to the field of building exterior wall systems, specifically relating to a concealed dry mechanical connection device for assembly units and structural systems. Background Technology

[0002] Currently, the exterior wall systems of buildings in my country are still mainly based on cast-in-place reinforced concrete or infill masonry structures. With the gradual improvement of my country's industrialization and the increasing number of prefabrication plants for building components, the manufacturing of composite exterior walls has become more decentralized. For example, some prefabrication component manufacturers in my country are already able to produce composite exterior wall panels for prefabricated buildings.

[0003] This research focuses on the exterior wall systems of frame structure buildings. Under the premise of prefabricated concrete composite exterior walls that integrate structure, insulation, waterproofing, and finishing in the factory, the aim is to innovate the current assembly-based construction method that combines factory prefabrication and on-site casting, minimize the degree of on-site wet work, and attempt to build a dry assembly method for composite exterior walls of frame structure buildings. This will enable the exterior wall system to be installable, removable, and replaceable without affecting the structural system.

[0004] Currently, the connection methods for exterior wall systems in prefabricated buildings can be divided into two types: prefabricated integral construction and dry-hanging construction. Prefabricated integral construction involves an exterior wall system composed of inner-leaf concrete shear walls, a sandwich insulation layer, and outer-leaf concrete wall panels. Reinforcing steel is typically pre-reserved in the inner-leaf structural layer, and vertical connections between assembly units are achieved on-site using grouting sleeves. Horizontal connections are achieved by post-cast concrete pouring after the prefabricated wall panels are hoisted into place. This construction method is generally used for frame-shear wall structures or shear wall structures, and can only combine factory prefabrication with on-site casting, still inevitably encountering the problem of wet work on-site. Dry-hanging construction, while achieving dry connections, requires pre-embedded connectors in the prefabricated standard units, increasing the complexity of the production process. Furthermore, the connection process using angle steel gaskets, bolts, and other connectors to the structural system is a direct connection, affecting not only the stability of the structural system but also exposing the connectors directly to the interior space, impacting further interior decoration and the integrity of the building space. Summary of the Invention

[0005] The purpose of this utility model is to provide a concealed dry mechanical connection device between the assembly unit and the structural system, which solves the problems of poor stability in the existing dry assembly method between the composite exterior wall system and the structural system, and the fact that the connecting parts are directly exposed in the internal space, affecting further interior decoration and the integrity of the building space.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a concealed dry mechanical connection device for assembly units and structural systems, including a steel keel, which is fixed to the structural system and embedded in the composite exterior wall panel in the assembly unit.

[0007] Preferably, the steel keel includes horizontal steel frames and vertical steel frames, wherein there are two horizontal steel frames, which are respectively embedded in the top and bottom of the composite exterior wall panel; two adjacent composite exterior wall panels placed on the same plane are connected by vertical steel frames, and the two ends of the vertical steel frames are respectively connected to the two horizontal steel frames.

[0008] Preferably, the horizontal steel frame at the top is fixedly connected to the horizontal beam in the structural system; the horizontal steel frame at the bottom is fixedly connected to the ground in the structural system.

[0009] Preferably, each of the composite exterior wall panels has a horizontal concave interface on the upper and lower edges of its inner wall surface for installing a horizontal steel frame, and the left and right sides of the inner wall surface of the composite exterior wall panel have vertical concave interfaces for installing a vertical steel frame. The width of the horizontal concave interface is the width of the horizontal steel frame, and the width of the vertical concave interface is half the width of the vertical steel frame.

[0010] Preferably, the horizontal concave interfaces at the top and bottom ends of the composite exterior wall panel are respectively fitted onto two horizontal steel frames; the vertical concave interfaces on the left and right sides of the composite exterior wall panel are respectively fitted onto two vertical steel frames, and the vertical concave interfaces of two adjacent composite exterior wall panels are fitted onto the same vertical steel frame.

[0011] Preferably, the two ends of the vertical steel frame are fixedly connected to the two horizontal steel frames by angle steel.

[0012] Preferably, two adjacent composite exterior wall panels placed at the corner of the wall are butted together to form an integrated structure, and the two composite exterior wall panels are provided with an inclination angle of greater than or equal to 90°. The vertical concave interfaces at the joint of the two composite exterior wall panels are connected to form a groove, and the joint of the two vertical concave interfaces is provided with an inclination angle of greater than or equal to 90°; A keel frame is fitted into the groove.

[0013] Preferably, the keel frame includes a first L-shaped plate and a second L-shaped plate, which are connected to each other, and the connection between them is provided with an inclination angle of greater than or equal to 90°.

[0014] Preferably, the keel frame and the composite exterior wall panel are bolted together.

[0015] Preferably, adhesive is applied to the joints between the steel keel and the structural system and the composite exterior wall panel.

[0016] Compared with the prior art, the beneficial effects of this utility model are: This utility model provides a concealed dry mechanical connection device between an assembly unit and a structural system. A steel keel is set on the structural system and embedded in the composite exterior wall panel in the assembly unit. This connection method hides the steel keel inside the composite exterior wall panel, and will not cause the risk of exposed components requiring further treatment for the interior space. This ensures the integrity and purity of the interior space. At the same time, since the composite exterior wall panel is connected to the structural system indirectly, if the composite exterior wall panel needs to be replaced, it will have less impact on the stability of the structural system.

[0017] Furthermore, since both the horizontal and vertical steel frames are channel steel structures, the bolts can be easily hidden inside the channel steel when fixing the steel keel, structural system, and composite exterior wall panels. This avoids the potential for exposed components that need to be addressed during further interior decoration, thus ensuring the integrity and purity of the interior space. Attached Figure Description

[0018] Figure 1 This is a side view of the connection between the composite exterior wall panel and the steel keel in an embodiment of this utility model; Figure 2 This is a top view of the connection between the composite exterior wall panel and the steel keel in an embodiment of this utility model; Figure 3 This is a front view of the connection between the composite exterior wall panel and the steel keel in an embodiment of this utility model; Figure 4 This is a partially enlarged view of the connection between the composite exterior wall panel and the steel keel in an embodiment of this utility model; Figure 5 This is a side view of the composite exterior wall panel with a planar structure in an embodiment of this utility model; Figure 6 This is a top view of the composite exterior wall panel with a planar structure in an embodiment of this utility model; Figure 7 This is a top view of the first type (with an included angle of 90°) composite exterior wall panel at the corner of the wall in this utility model embodiment; Figure 8 This is a top view of the composite exterior wall panel at the wall corner in the second type (angle greater than 90°) embodiment of this utility model; Figure 9 This is a schematic diagram of the first type (with an included angle of 90°) keel frame in this utility model embodiment; Figure 10 This is a schematic diagram of the first type (with an included angle greater than 90°) keel frame in this utility model embodiment; Among them, 1. Horizontal steel frame; 2. Vertical steel frame; 3. Composite exterior wall panel; 31. Horizontal concave interface; 32. Vertical concave interface; 33. Groove; 4. Keel frame; 5. Angle steel. Detailed Implementation

[0019] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0020] Example 1 like Figure 1 and Figure 2 As shown, this embodiment provides a concealed dry mechanical connection device between an assembly unit and a structural system, including a steel keel, which is used to realize the connection between the composite exterior wall panel 3 in the assembly unit and the structural system.

[0021] In the structural system, each beam used for installing the composite exterior wall panel is provided with a steel keel, and the composite exterior wall panel 33 is embedded in the steel keel.

[0022] In this embodiment, steel keels are arranged on the beams used to install the composite exterior wall panels in the structural system. The composite exterior wall panels are embedded in the steel keels. This structure can hide the connectors to avoid affecting the interior decoration and the integrity of the building space. At the same time, the steel keels can increase the stability between the composite exterior wall panels and the structural system.

[0023] Example 2 like Figures 3 to 6 As shown, based on Embodiment 1, this embodiment provides a concealed dry mechanical connection device for assembly units and structural systems. The composite exterior wall panel 3 is a planar structure. The upper and lower edges of the inner wall surface of the composite exterior wall panel 3 are provided with horizontal concave interfaces 31, and the left and right sides of the inner wall surface of the composite exterior wall panel 3 are provided with vertical concave interfaces 32.

[0024] The width of the horizontal concave interface 31 is the same as the width of the horizontal steel frame 1; the width of the vertical concave interface 32 is half the width of the vertical steel frame 2.

[0025] The steel keel includes horizontal steel frames 1 and vertical steel frames 2. There are two horizontal steel frames 1, which are respectively embedded in the top and bottom of the composite exterior wall panel 3.

[0026] The top horizontal steel frame 1 is fixedly connected to the crossbeams in the structural system; the bottom horizontal steel frame 1 is fixedly connected to the ground in the structural system.

[0027] Two adjacent composite exterior wall panels 3 placed on the same plane are connected by a vertical steel frame 2, and the two ends of the vertical steel frame 2 are respectively fixedly connected to two horizontal steel frames 1.

[0028] Two adjacent composite exterior wall panels placed at the corner of the wall are connected to form an integrated structure, and the two composite exterior wall panels are inclined at an angle of greater than or equal to 90°.

[0029] The vertical concave interfaces 32 at the connection of the two composite exterior wall panels are connected to form a groove 33, and the connection of the two vertical concave interfaces 32 is provided with an inclination angle of greater than or equal to 90°.

[0030] A keel frame 4 is fitted into the groove 33.

[0031] The horizontal concave interfaces 31 at the upper and lower ends of the composite exterior wall panel 3 are respectively fastened to two horizontal steel frames 1.

[0032] The vertical concave interfaces 32 on the left and right sides of the composite exterior wall panel 3 are respectively clamped on two vertical steel frames 2, and the vertical concave interfaces 32 of two adjacent composite exterior wall panels 3 are clamped on the same vertical steel frame 2.

[0033] Example 3 like Figures 1 to 6 As shown, based on Embodiment 2, this embodiment provides a concealed dry mechanical connection device for assembly units and structural systems, wherein both ends of the vertical steel frame 2 are connected to the two horizontal steel frames 1 by angle steel 5.

[0034] In this embodiment, the vertical steel frame 2 and the horizontal steel frame 1 are connected by angle steel to improve the stability of the vertical steel frame.

[0035] Example 4 like Figures 7 to 10 As shown, based on Embodiment 2, this embodiment provides a concealed dry mechanical connection device for assembly units and structural systems, wherein the keel frame 4 and the composite exterior wall panel 3 are bolted together.

[0036] The keel frame 4 includes a first L-shaped plate and a second L-shaped plate, which are connected to each other, and the connection between them is provided with an inclination angle of greater than or equal to 90°.

[0037] In this embodiment, two adjacent composite exterior wall panels at the corner of the wall are connected to form an integral structure, and a keel frame 4 is installed at the connection to increase the load-bearing capacity of the wall.

[0038] Example 5 This embodiment provides a concealed dry mechanical connection device for assembly units and structural systems. A channel steel with a certain width and a certain flange thickness is selected as the steel keel (in this embodiment, the selected channel steel has a width of 200mm and a flange thickness of 10mm). The steel keel is fixedly connected to the crossbeam and the ground by bolts.

[0039] The steel keel includes two horizontal steel frames 1, which are fixedly connected to the crossbeam and the ground, respectively. During installation, the lower flange of the upper horizontal steel frame 1 is fixedly connected to the composite exterior wall panel with bolts, and the upper flange of the upper horizontal steel frame 1 is fixedly connected to the crossbeam in the structural system with bolts; the upper flange of the lower horizontal steel frame 1 is fixedly connected to the composite exterior wall panel with bolts, and the lower flange of the lower horizontal steel frame 1 is fixedly connected to the crossbeam in the structural system with bolts.

[0040] Alternatively, the bottom of the horizontal steel frame 1 can be fixedly connected to the composite exterior wall panel by bolts.

[0041] The two side flanges of the vertical steel frame 2 are fixedly connected to two adjacent composite exterior wall panels by bolts.

[0042] The structural layer of the composite exterior wall panel 3 has concave interfaces on the top, bottom, left, and right sides. The width of the concave interfaces on the left and right sides is half the width of the vertical steel frame 2, so that two adjacent composite exterior wall panels can be spliced ​​together to form an integral structure. When viewed from the inside, the structural layer is tangent to the keel. The composite exterior wall panel of this structure serves to hide the steel keel.

[0043] After installation, apply adhesive to all joints.

[0044] The composite exterior wall panels developed above are connected to the structural system through pre-embedded keel. Since the composite exterior wall panels are connected to the structural system indirectly, if the composite exterior wall panels need to be replaced, it will have less impact on the stability of the structural system. Furthermore, the steel keel is hidden inside the composite exterior wall panels and the bolt connectors are hidden inside the channel steel keel, which will not cause the risk of exposed components requiring further treatment for the interior space, thus ensuring the integrity and purity of the interior space.

[0045] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A concealed dry mechanical connection device for assembly units and structural systems, characterized in that, The system includes a steel keel, which is fixed to the structural system and embedded in the composite exterior wall panel of the assembly unit. The steel keel includes horizontal steel frames and vertical steel frames. Two horizontal steel frames are provided, which are respectively embedded in the top and bottom of the composite exterior wall panel. Two adjacent composite exterior wall panels placed on the same plane are connected by vertical steel frames, and the two ends of the vertical steel frames are respectively connected to the two horizontal steel frames. The horizontal steel frame at the top is fixedly connected to the beam in the structural system. The horizontal steel frame at the bottom is fixedly connected to the ground in the structural system. The upper and lower edges of the inner wall surface of each composite exterior wall panel are provided with horizontal concave interfaces for installing the horizontal steel frames, and the left and right sides of the inner wall surface of the composite exterior wall panel are provided with vertical concave interfaces for installing the vertical steel frames. The width of the horizontal concave interface is the width of the horizontal steel frame, and the width of the vertical concave interface is half the width of the vertical steel frame.

2. The concealed dry mechanical connection device for assembly units and structural systems according to claim 1, characterized in that, The horizontal concave interfaces at the top and bottom ends of the composite exterior wall panel are respectively fitted onto two horizontal steel frames; the vertical concave interfaces on the left and right sides of the composite exterior wall panel are respectively fitted onto two vertical steel frames, and the vertical concave interfaces of two adjacent composite exterior wall panels are fitted onto the same vertical steel frame.

3. The concealed dry mechanical connection device for assembly units and structural systems according to claim 1, characterized in that, The two ends of the vertical steel frame are fixedly connected to the two horizontal steel frames by angle steel.

4. The concealed dry mechanical connection device for assembly units and structural systems according to claim 1, characterized in that, Two adjacent composite exterior wall panels placed at the corner of the wall are butted together to form an integrated structure, and the two composite exterior wall panels are inclined at an angle of 90° or greater; the vertical concave interfaces at the connection of the two composite exterior wall panels are butted together to form a groove, and the two vertical concave interfaces are inclined at an angle of 90° or greater; a keel frame is installed in the groove.

5. The concealed dry mechanical connection device for assembly units and structural systems according to claim 4, characterized in that, The keel frame includes a first L-shaped plate and a second L-shaped plate, which are connected to form an integral structure, and the connection between the two plates has an inclination angle of 90° or greater.

6. The concealed dry mechanical connection device for assembly units and structural systems according to claim 4, characterized in that, The keel frame and the composite exterior wall panel are bolted together.

7. The concealed dry mechanical connection device for assembly units and structural systems according to claim 1, characterized in that, Adhesive is applied to the joints between the steel keel and the structural system and the composite exterior wall panel.

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