Fabricated curtain wall green low-carbon structure and mounting method

Abstract

The invention relates to the technical field of curtain wall structure construction, and discloses a fabricated curtain wall green low-carbon structure and a mounting method.The fabricated curtain wall green low-carbon structure comprises a structural wall body and a curtain wall connecting keel, a structural embedded part is embedded in the structural wall body, and the tail end of the structural embedded part is fixedly connected with an upturning keel hanging point; the upturning keel hanging point is detachably connected with the curtain wall connecting keel, one side of the curtain wall connecting keel is fixedly connected with a connecting piece, the connecting piece is rotationally connected with a rotating ball joint, the end, away from the connecting piece, of the rotating ball joint is fixedly connected with a curtain wall panel, and a gap between the curtain wall connecting keel and the curtain wall panel is filled with fireproof filler. According to the invention, the construction error requirement is accurately covered by rotating the ball joint within the rotation range of + / -15 degrees, and a mechanical locking mechanism of the jackscrew is matched, so that not only can the complex external facade model be realized through the rotation of the ball body, but also the static friction force fixed angle can be formed through the axial pressure, and the offset caused by wind pressure and vibration is avoided; the double effects of flexible adjustment and firm locking are achieved.

Description

Technical Field

[0001] This invention relates to the field of curtain wall structure construction technology, and in particular to a prefabricated green and low-carbon curtain wall structure and its installation method. Background Technology

[0002] In recent years, with the rapid development of my country's economy, and against the backdrop of efforts to improve land use efficiency and explore a new model of harmonious coexistence between people and buildings, the development speed of high-rise buildings has been increasing day by day. Unlike traditional buildings, the external envelope of high-rise buildings is mainly curtain wall engineering. Compared with other envelope structures, curtain wall engineering has unique advantages in terms of appearance, low carbon and energy saving, space utilization and later maintenance.

[0003] Curtain walls can give buildings a unique and modern appearance. By combining different materials, colors, shapes, and textures, they can create a visually striking architectural image. Glass curtain walls can make the building appear transparent and bright. Large glass curtain walls can bring in ample natural light into the interior, thereby reducing the need for artificial lighting and achieving energy savings. Compared to other building facades, curtain wall structures are mainly suspended, making them relatively lightweight and not taking up too much interior space, thus increasing usable area. The outer surface of curtain walls is usually relatively smooth, making cleaning and maintenance relatively easy.

[0004] However, curtain wall engineering also has the following drawbacks that urgently need to be improved: First, traditional curtain walls are mostly rigid fixed structures (such as welding of masts and embedded parts), and the angle of the panels cannot be adjusted after installation, which cannot meet the needs of complex facade shapes; Second, replacing the panels requires disassembling the surrounding structure and cutting the welds, which is a complicated process and can easily damage adjacent components, resulting in low maintenance efficiency and high costs. Summary of the Invention

[0005] To overcome the above shortcomings, this invention provides a prefabricated green and low-carbon curtain wall structure and installation method, solving the problems of the inability to adjust the angle of the curtain wall panels after installation and the inconvenience of replacing the panels later.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a prefabricated green and low-carbon curtain wall structure, comprising a structural wall and a curtain wall connecting keel, wherein a structural embedded part is pre-embedded inside the structural wall, and an upward-turning keel hanging point is fixedly connected to the end of the structural embedded part. The upward-turning keel hanging point is detachably connected to the curtain wall connecting keel. A connector is fixedly connected to one side of the curtain wall connecting keel, and a rotating ball joint is rotatably connected to the connector. A curtain wall panel is fixedly connected to the end of the rotating ball joint away from the connector. Fireproof filler is used to fill the gap between the curtain wall connecting keel and the curtain wall panel.

[0007] As a further description of the above technical solution: the material of the structural embedded part is Q235 steel, and the end is provided with an anti-pull plate which is welded and fixed to the structural embedded part body and located inside the concrete.

[0008] As a further description of the above technical solution: the end of the upward-turning keel hanging point is provided with a hook, and the side of the curtain wall connecting keel is provided with a buckle adapted to the hook. The hook and the buckle are interlocked and are both made of metal.

[0009] As a further description of the above technical solution: the curtain wall panel adopts double-layer hollow glass, and sealing strips are embedded in the reserved grooves around the edges.

[0010] As a further description of the above technical solution: the fireproof filler is rock wool or aluminum silicate fiber cotton.

[0011] As a further description of the above technical solution: the rotating ball joint is composed of a rotating shaft and a spherical shell fixedly connected together. The rotating shaft has a threaded hole through it, and a set screw is threaded into the threaded hole. The set screw passes through a reserved hole on the side of the curtain wall panel and enters the inner cavity of the spherical shell.

[0012] As a further description of the above technical solution: the connector is composed of a ball shaft and a universal ball fixedly connected, and the universal ball is embedded in the inner cavity of the spherical shell and rotatably connected thereto.

[0013] As a further description of the above technical solution: the inner cavity of the spherical shell is provided with an arc-shaped protrusion, and the universal ball is provided with a corresponding arc-shaped groove. The arc-shaped protrusion can slide in the arc-shaped groove, and the rotation angle range of the rotating ball node is ±15°.

[0014] An installation method for a prefabricated green and low-carbon curtain wall structure includes the following steps:

[0015] Step S1: During the concrete reinforcement binding stage of the structural wall, the structural embedded parts are precisely embedded according to the design position, ensuring that the embedded part body and the pull-out plate welded at the end are completely placed within the concrete pouring range; after the embedded parts are embedded, the positioning marks are made. After the concrete is poured and reaches the design strength, the position, firmness and integrity of the structural embedded parts are checked.

[0016] Step S2: Confirm that the hooks of the upturned keel hanging points match the size of the clips of the curtain wall connecting keel; align and fasten the clips on the side of the curtain wall connecting keel with the hooks of the upturned keel hanging points, and tighten them with bolts after fastening; after installation, check the levelness of the keel to ensure that the curtain wall connecting keel is parallel to the structural wall.

[0017] Step S3: Secure the rotating ball joint to the curtain wall connecting keel using steel connectors. Before screwing, clean the connecting surface to ensure a tight connection. Fill the grease cavity inside the rotating ball joint with grease. Initially fix the metal frame at the edge of the curtain wall panel to the end of the rotating ball joint away from the connector, so that the sealing strips of adjacent curtain wall panels are pressed against each other. Check the integrity of the sealing strips in the grooves around the edges of the curtain wall panels.

[0018] Step S4: Clean the debris in the gap between the curtain wall connecting keel and the curtain wall panel to ensure that there is no dust or debris. Fill the gap between the curtain wall connecting keel and the curtain wall panel with fireproof filler. Use a layered compaction process. After compaction, use a thickness plug gauge to check the filling thickness deviation to ensure that there is no gap between the filler and the mating surface of the curtain wall connecting keel and the curtain wall panel.

[0019] Step S5: Attach the digital angle gauge to the outer surface of the curtain wall panel, rotate the rotating ball joint to adjust the panel angle; at the same time, use a level to check the flatness of the curtain wall panel surface; after adjusting to the target angle, insert the set screw through the pre-drilled hole on the side of the curtain wall panel, and embed the end of the set screw into the connecting ball inside the rotating ball joint; tighten the set screw with a torque wrench, and check again with a torque wrench after tightening to ensure that the set screw is not loose and the rotating ball joint is firmly locked, and the installation is complete.

[0020] As a further description of the above technical solution: In step S1, when the structural embedded part fails, a post-installed embedded part is used to fill the gap, and the specific steps are as follows:

[0021] Step S11: Use a metal detector to locate the position of the reinforcing bars inside the structural wall, and determine the drilling point while avoiding the reinforcing bars; use a water drill to drill vertically, with the hole diameter 2mm larger than the diameter of the rebar; after drilling, check that the hole depth and diameter are qualified.

[0022] Step S12: First, use an air compressor to blow air into the hole 3-5 times to remove dust; then use a wire brush and cotton yarn to wipe the hole wall, and repeat blowing until there is no dust or debris; finally, use degreased cotton soaked in alcohol / acetone to wipe the hole wall, seal the hole to prevent foreign objects from entering, and ensure that the hole is clean and dry.

[0023] Step S13: Use a glue gun to inject anchoring glue from the bottom of the hole into the hole, injecting glue to 2 / 3 of the hole depth; rotate the rebar or use a hand hammer to drive it into the hole, ensuring that a small amount of glue overflows around the perimeter after insertion, and let it stand until the anchoring glue cures.

[0024] Step S14: Use low-temperature brazing to weld the bottom of the hanging point of the upturned keel to the top of the rebar; after welding, let it stand for 24 hours, and use a pull-out tester to check the anchoring force of the rebar. Only after it passes the test can you proceed to the next step.

[0025] The present invention has the following beneficial effects:

[0026] 1. In this invention, the structural embedded parts are equipped with anti-pull plates. By using the mechanical principle of surface force to replace point / line force, the pull-out bearing capacity is significantly improved. Combined with the standardized process of post-installed embedded parts, the problem of embedded failure can be effectively addressed, ensuring the structural stability of high-rise buildings in strong wind environments. In addition, the ±15° rotation range of the rotating ball node accurately covers the construction error requirements. With the mechanical locking mechanism of the top screw, complex facade shapes can be achieved through ball rotation, and the angle can be fixed by static friction formed by axial pressure, avoiding the deviation caused by wind pressure and vibration. This achieves the dual effects of flexible adjustment and firm locking, greatly improving the adaptability and appearance accuracy of curtain wall construction.

[0027] 2. In this invention, the hooks of the upward-turning keel hanging point and the buckles of the curtain wall connecting keel adopt a snap-fit ​​detachable connection, which replaces the traditional welding process, saves electricity, and avoids steel loss caused by welding slag and cutting allowance, meeting the requirements of low-carbon construction; the detachable structure, combined with the convenient adjustment characteristics of the rotating ball node, allows the replacement of curtain wall panels without damaging surrounding components, and only requires loosening the bolts and top screws to complete the operation, which greatly reduces maintenance costs and construction time.

[0028] 3. In this invention, the combination of double-glazed glass and sealing strips in the curtain wall panel can both block heat transfer through the air gap to reduce air conditioning / heating energy consumption and control the leakage rate to an extremely low level through closed-loop sealing, thus achieving both energy saving and waterproofing functions; the fireproof filler has a high fire resistance limit, which can maintain the integrity and stability of the structure for a certain period of time, effectively block heat transfer, reduce the impact of fire on the other side of the curtain wall, prevent smoke from spreading through the gaps in the curtain wall, and reduce the threat of smoke to people's lives. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a prefabricated green and low-carbon curtain wall structure according to the present invention;

[0030] Figure 2 In this invention Figure 1 A magnified view of point A;

[0031] Figure 3 This is a schematic diagram of the anti-pull-out plate structure of a prefabricated curtain wall green low-carbon structure in this invention;

[0032] Figure 4 This is a schematic diagram of the curtain wall panel angle after adjustment in a prefabricated green and low-carbon curtain wall structure according to the present invention.

[0033] Figure 5 This is a schematic cross-sectional view of a rotating spherical node in a prefabricated green and low-carbon curtain wall structure according to the present invention.

[0034] Figure 6This is a schematic diagram of the rotating spherical node arc protrusion structure of a prefabricated curtain wall green low-carbon structure in this invention;

[0035] Figure 7 This is a schematic diagram of the post-installation embedded parts operation steps in the installation method of a prefabricated curtain wall green low-carbon structure according to the present invention.

[0036] Legend:

[0037] 1. Structural embedded parts; 2. Upward-turning keel hanging points; 3. Curtain wall panels; 4. Structural walls; 5. Connectors; 501. Ball shaft; 502. Universal ball; 6. Curtain wall connecting keel; 7. Fireproof filler; 8. Rotating ball joint; 801. Rotating shaft; 802. Spherical shell; 9. Anti-pull plate; 10. Hook; 11. Clip; 12. Top screw; 13. Sealing strip; 14. Arc-shaped protrusion; 15. Arc-shaped groove. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1: Refer to Figure 1-5 A prefabricated green and low-carbon curtain wall structure includes a structural wall 4 and a curtain wall connecting keel 6. A structural embedded part 1 is pre-embedded inside the structural wall 4. An upward-turning keel hanging point 2 is fixedly connected to the end of the structural embedded part 1. The upward-turning keel hanging point 2 is detachably connected to the curtain wall connecting keel 6. A connector 5 is fixedly connected to one side of the curtain wall connecting keel 6. A rotating ball joint 8 is rotatably connected to the connector 5. A curtain wall panel 3 is fixedly connected to the end of the rotating ball joint 8 away from the connector 5. Fireproof filler 7 is filled in the gap between the curtain wall connecting keel 6 and the curtain wall panel 3. The structure is constructed by pre-embedding components in the structural wall... The pre-embedded structural component 1 of body 4 ensures a reliable connection between the curtain wall and the main structure; the detachable connection between the upward-turning keel hanging point 2 and the curtain wall connecting keel 6 enables prefabricated installation; the rotating ball node 8 adapts to the angle adjustment requirements of the curtain wall panel 3, solving the core pain points of traditional rigid welding of curtain walls and the inability to adjust the angle of the curtain wall panel 3; the gap between the curtain wall connecting keel 6 and the curtain wall panel 3 is filled with fireproof filler 7 to form a fire barrier, blocking the path of heat and fire transmission and improving the fire safety of the building; the fully prefabricated design reduces on-site welding procedures, reduces power consumption and steel loss, and is in line with the goal of "green and low-carbon".

[0040] Specifically, the structural embedded part 1 is made of Q235 steel, and its end is equipped with a pull-out plate 9 which is welded and fixed to the body of the structural embedded part 1 and located inside the concrete. The structural embedded part 1 is made of Q235 steel, which has good yield strength (≥235MPa), which can meet the mechanical requirements of the structural embedded part 1 to bear the self-weight of the curtain wall panel 3, wind load and other external forces, and avoid structural deformation due to insufficient material strength. After the pull-out plate 9 at the end of the structural embedded part 1 is welded to the body, it is embedded in the concrete, which greatly increases the contact area and mechanical interlocking force between the structural embedded part 1 and the concrete. By replacing point / line force with surface force, the pull-out bearing capacity is significantly improved, and the structural embedded part 1 is prevented from coming out of the concrete due to tension. This solves the safety hazard of insufficient pull-out force of traditional curtain wall structural embedded parts 1 and easy loosening and falling off under strong winds in high-rise buildings.

[0041] Specifically, the end of the upward-turning keel hanging point 2 is equipped with a hook 10, and the side of the curtain wall connecting keel 6 is equipped with a buckle 11 that matches the hook 10. The hook 10 and the buckle 11 are interlocked and are both made of metal. The hook 10 and the buckle 11 are interlocked to replace the traditional welding connection. The interlocking connection does not require on-site welding. It can be assembled by simply aligning and fixing with bolts. When disassembling, the bolts can be removed to separate the curtain wall connecting keel 6 and the upward-turning keel hanging point 2. On-site welding is eliminated, which reduces power consumption (saving about 50 kWh of power per 100㎡ of curtain wall) and steel loss (avoiding the waste of welding slag and cutting allowance), in line with green and low-carbon requirements. When disassembling the curtain wall connecting keel 6 to replace the curtain wall panel 3 in the future, there is no need to damage the surrounding structure, which reduces maintenance costs.

[0042] Specifically, the curtain wall panel 3 uses double-glazed glass, and sealing strips 13 are embedded in the reserved grooves around its edges. The air gap between the double-glazed curtain wall panel 3 and the air gap can block heat transfer, reduce air conditioning and heating energy consumption, and reduce the building's annual air conditioning / heating energy consumption, which is in line with the goal of low carbon and energy conservation. The sealing strips 13 embedded in the reserved grooves around the edges of the curtain wall panel 3, after installation, the sealing strips 13 of adjacent curtain wall panels 3 are squeezed together to directly fill the gaps between the curtain wall panels 3. The sealing strips 13 are installed in one go, eliminating the need for secondary caulking, saving process time, and the sealing strips 13 fit tightly with the grooves of the curtain wall panel 3, which greatly reduces the leakage rate.

[0043] Specifically, the fireproof filler 7 is made of rock wool; it can slow the spread of fire during a fire and prevent flames from entering the building through the gaps between the curtain wall connecting keel 6 and the curtain wall panel 3; at normal temperature, it can reduce the exchange of heat between indoors and outdoors, and help improve the energy efficiency of the curtain wall; at the same time, it can absorb some outdoor noise and improve the comfort of the indoor acoustic environment.

[0044] Example 2: Refer to Figure 5 and Figure 6The rotating ball joint 8 is composed of a rotating shaft 801 and a spherical shell 802 fixedly connected. The rotating shaft 801 has a threaded hole through which a set screw 12 is threaded. The set screw 12 passes through a pre-drilled hole on the side of the curtain wall panel 3 and enters the inner cavity of the spherical shell 802. When the set screw 12 is tightened, the axial force of the thread is used to tighten the components inside the spherical shell 802 to achieve angle locking. The threaded set screw 12 is easy to operate (it can be locked / unlocked by turning it), and the thread has strong self-locking properties, which can reliably fix the angle. It provides a precise and feasible structural basis for the adjustment and locking of the angle of the curtain wall panel 3, ensuring that it is not easy to loosen after the angle is fixed.

[0045] The connector 5 includes a ball shaft 501 and a universal ball 502 fixedly connected to it. The universal ball 502 is embedded in the inner cavity of the spherical shell 802 and rotated therewith to form a ball hinge rotation connection. The ball hinge connection enables the curtain wall panel to have three-dimensional angle adjustment capability, which can adapt to complex building facade shapes or compensate for the installation errors of embedded parts and keel during construction.

[0046] Preferably, the inner cavity of the spherical shell 802 is provided with an arc-shaped protrusion 14, and the universal ball 502 is provided with a corresponding arc-shaped groove 15. The arc-shaped protrusion 14 can slide within the arc-shaped groove 15, and the rotation angle range of the rotating ball node 8 is ±15°. When it is necessary to adjust the angle of the curtain wall panel 3, an external force drives the rotating ball node 8 to rotate relative to the connector 5. At this time, the universal ball 502 rotates within the spherical shell 802, and the arc-shaped protrusion 14 slides along the arc-shaped groove 15. Since the arc length of the arc-shaped groove 15 strictly corresponds to the ±15° rotation angle (angle matching is achieved by accurately calculating the central angle of the arc-shaped groove 15), when the arc-shaped protrusion 14 slides to any end face of the arc-shaped groove 15, The rotation angle of the rotating ball joint 8 is limited to ±15° by the limiting end face. Traditional unrestricted ball joint connections are prone to excessive rotation under the weight of the curtain wall panel 3 (especially large panels) or strong wind loads of high-rise buildings, which can lead to excessive contact between the spherical shell 802 and the ball shaft 501, local stress concentration, and even deformation of the spherical shell 802 and component detachment. In this embodiment, the mechanical limiting of the arc protrusion 14 and the arc groove 15 avoids this risk from the root: by limiting the rotation boundary in advance, the load is always transmitted within the safe range of the structural design, ensuring the long-term stability and service life of the rotating ball joint.

[0047] To further explain the above embodiments, the present invention also provides an installation method for a prefabricated green and low-carbon curtain wall structure. The specific steps for installing the prefabricated green and low-carbon curtain wall structure are as follows:

[0048] Step S1: During the C30 concrete reinforcement binding stage of structural wall 4, pre-embed structural embedded part 1 according to the design position: determine the anchorage depth according to the building height (height ≤ 80m, building anchorage ≥ 200mm; height > 80m, building anchorage ≥ 250mm), ensuring that the pull-out plate 9 at the tail end of structural embedded part 1 is completely embedded in the concrete, and the body of structural embedded part 1 is tied and fixed to the concrete reinforcement; avoid the vibrator touching structural embedded part 1 when pouring concrete to prevent displacement, and finally make structural embedded part 1 and structural wall 4 concrete form a firm bond, the pull-out force needs to be verified by the pull-out force formula of "Technical Specification for Post-Anchoring of Concrete Structures" JGJ145 (≥ 15kN); if structural embedded part 1 fails, a post-installed embedded part is used for replacement (e.g., Figure 7 (As shown): The specific process is as follows:

[0049] Step S11: Use a metal detector to locate the position of the reinforcing bars inside the structural wall 4, and determine the drilling point by avoiding the reinforcing bars; use a water drill to drill vertically (the drill bit is perpendicular to the cross section of the component), and the hole diameter is 2mm larger than the diameter of the reinforcing bar. After drilling, check that the hole depth and hole diameter are qualified.

[0050] Step S12: First, use an air compressor to blow air into the hole 3-5 times to remove dust; then use a wire brush and cotton yarn to wipe the hole wall, and repeat blowing until there is no dust or debris; finally, use degreased cotton soaked in alcohol / acetone to wipe the hole wall, seal the hole to prevent foreign objects from entering, and ensure that the hole is clean and dry.

[0051] Step S13: Use a glue gun to inject anchoring glue from the bottom of the hole into the hole, injecting glue to 2 / 3 of the hole depth; rotate the rebar or use a hand hammer to drive it into the hole, ensuring that a small amount of glue overflows around the perimeter after insertion, and let it stand until the anchoring glue cures.

[0052] Step S14: Use low temperature brazing process to weld the bottom of the upturned keel hanging point 2 to the top of the rebar; after welding, let it stand for 24 hours, and use a pull-out tester to test the anchoring force of the rebar. Only after it passes the test can the next step be carried out.

[0053] Step S2: Confirm that the hook 10 of the upward-turning keel hanging point 2 matches the size of the buckle 11 of the curtain wall connecting keel 6, and that the zinc coating on the contact surface is intact; align and fasten the buckle 11 on the side of the curtain wall connecting keel 6 with the hook 10 of the upward-turning keel hanging point 2, ensuring that the fit gap is ≤1mm; tighten with bolts after fastening; after installation, check the levelness of the curtain wall connecting keel 6 (deviation ≤2mm per 2m), ensuring that the curtain wall connecting keel 6 is parallel to the structural wall 4;

[0054] Step S3: Secure the rotating ball joint 8 to the curtain wall connecting keel 6 by screwing in the steel connector 5. Clean the connection surface before screwing to ensure a tight connection. Fill the lubrication cavity inside the rotating ball joint 8 with lithium-based grease. Initially fix the metal frame at the edge of the curtain wall panel 3 to the end of the rotating ball joint 8 away from the connector 5, so that the sealing strips 13 of adjacent curtain wall panels 3 are pressed against each other. Check the sealing strips 13 in the grooves around the edges of the curtain wall panel 3. Apply a 5mm wide silicone sealant to the contact surface between the sealing strips 13 and the groove. Press the sealing strips 13 of adjacent curtain wall panels 3 against each other. Use a thickness plug gauge to check the compression rate of the sealing strips 13 (18-22%). The two ends of the sealing strips 13 abut against the inner wall of the curtain wall connecting keel 6 to form a closed-loop seal.

[0055] Step S4: Clean the debris in the gap between the curtain wall connecting keel 6 and the curtain wall panel 3, ensuring there is no dust or debris. Fill the gap between the curtain wall connecting keel 6 and the curtain wall panel 3 with fireproof filler 7 (rock wool / aluminum silicate fiber cotton) using a layered compaction process. Each layer should be ≤50mm thick. After compaction, use a thickness gauge to check the filling thickness deviation to ensure it is ≤3mm, ensuring that there are no gaps between the fireproof filler 7 and the mating surfaces of the curtain wall connecting keel 6 and the curtain wall panel 3.

[0056] Step S5: Attach the digital angle gauge to the outer surface of the curtain wall panel 3, rotate the rotating ball joint 8, and adjust the angle of the curtain wall panel 3: control the angle deviation ≤0.5°; at the same time, use a level to check the flatness of the surface of the curtain wall panel 3, and the deviation ≤2mm within every 2m; after adjusting to the target angle, insert the top screw 12 through the reserved hole on the side of the curtain wall panel 3, and embed the end of the top screw 12 into the rotating ball in the rotating ball joint 8; tighten the top screw 12 with a torque wrench, and control the torque value to 25-30N・m; after tightening, check with a torque wrench to ensure that the top screw 12 is not loose and the rotating ball joint 8 is firmly locked, and the installation is complete.

[0057] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A prefabricated green and low-carbon curtain wall structure, comprising a structural wall (4) and curtain wall connecting keel (6), characterized in that: The structural wall (4) is pre-embedded with a structural embedded part (1). The end of the structural embedded part (1) is fixedly connected to an upward keel hanging point (2). The upward keel hanging point (2) is detachably connected to the curtain wall connecting keel (6). A connector (5) is fixedly connected to one side of the curtain wall connecting keel (6). A rotating ball node (8) is rotatably connected to the connector (5). A curtain wall panel (3) is fixedly connected to the end of the rotating ball node (8) away from the connector (5). Fireproof filler (7) is filled in the gap between the curtain wall connecting keel (6) and the curtain wall panel (3).

2. The prefabricated curtain wall green and low-carbon structure according to claim 1, characterized in that: The material of the pre-embedded structural component (1) is Q235 steel, and the end is provided with an anti-pull plate (9) which is welded and fixed to the body of the pre-embedded structural component (1) and located inside the concrete.

3. The prefabricated curtain wall green and low-carbon structure according to claim 1, characterized in that: The end of the upward-turning keel hanging point (2) is provided with a hook (10), and the side of the curtain wall connecting keel (6) is provided with a buckle (11) that is compatible with the hook (10). The hook (10) and the buckle (11) are interlocked and are both made of metal.

4. The prefabricated curtain wall green and low-carbon structure according to claim 1, characterized in that: The curtain wall panel (3) is made of double-glazed glass, and sealing strips (13) are embedded in the reserved grooves around the edges.

5. A prefabricated green and low-carbon curtain wall structure according to claim 1, characterized in that: The fireproof filler (7) is rock wool or aluminum silicate fiber cotton.

6. The prefabricated curtain wall green and low-carbon structure according to claim 1, characterized in that: The rotating ball node (8) is formed by a rotating shaft (801) and a spherical shell (802) fixedly connected. The rotating shaft (801) has a threaded hole through which a set screw (12) is threaded. The set screw (12) passes through the side reserved hole of the curtain wall panel (3) and enters the inner cavity of the spherical shell (802).

7. A prefabricated green and low-carbon curtain wall structure according to claim 6, characterized in that: The connector (5) is formed by a ball shaft (501) and a universal ball (502) fixedly connected. The universal ball (502) is embedded in the inner cavity of the spherical shell (802) and rotated therewith.

8. A prefabricated green and low-carbon curtain wall structure according to claim 7, characterized in that: The inner cavity of the spherical shell (802) is provided with an arc-shaped protrusion (14), and the universal ball (502) is provided with a corresponding arc-shaped groove (15). The arc-shaped protrusion (14) can slide in the arc-shaped groove (15), and the rotation angle range of the rotating ball node (8) is ±15°.

9. An installation method for a prefabricated green and low-carbon curtain wall structure, comprising the prefabricated green and low-carbon curtain wall structure as described in any one of claims 1 to 8, characterized in that: Includes the following steps: Step S1: During the concrete reinforcement binding stage of the structural wall (4), the structural embedded part (1) is precisely embedded in the design position to ensure that the embedded part body and the pull-out plate (9) welded at the end are completely placed within the concrete pouring range; after the embedded part is embedded, the positioning mark is made. After the concrete is poured and reaches the design strength, the position, firmness and integrity of the structural embedded part (1) are checked. Step S2: Confirm that the hook (10) of the upturned keel hanging point (2) matches the size of the buckle (11) of the curtain wall connecting keel (6); Align and fasten the buckle (11) on the side of the curtain wall connecting keel (6) with the hook (10) of the upturned keel hanging point (2), and tighten it with bolts after fastening; Check the level of the keel after installation to ensure that the curtain wall connecting keel (6) is parallel to the structural wall (4); Step S3: Secure the rotating ball joint (8) to the curtain wall connecting keel (6) by screwing it with the steel connector (5). Before screwing, clean the debris on the connection surface to ensure a tight connection. Fill the grease cavity inside the rotating ball joint (8) with grease. Initially fix the metal frame of the curtain wall panel (3) edge to the end of the rotating ball joint (8) away from the connector (5) so that the sealing strips (13) of the adjacent curtain wall panels (3) are pressed against each other. Check the integrity of the sealing strips (13) in the grooves around the edges of the curtain wall panel (3). Step S4: Clean the debris in the gap between the curtain wall connecting keel (6) and the curtain wall panel (3) to ensure that there is no dust or debris. Fill the gap between the curtain wall connecting keel (6) and the curtain wall panel (3) with fireproof filler (7). Use a layered compaction process. After compaction, use a thickness gauge to check the filling thickness deviation to ensure that there is no gap between the filler and the mating surface of the curtain wall connecting keel (6) and the curtain wall panel (3). Step S5: Attach the digital angle gauge to the outer surface of the curtain wall panel (3), rotate the rotating ball joint (8) to adjust the panel angle; at the same time, use a level to check the flatness of the curtain wall panel (3) surface; after adjusting to the target angle, insert the top screw (12) through the reserved hole on the side of the curtain wall panel (3), and embed the end of the top screw (12) into the connecting ball in the rotating ball joint (8); tighten the top screw (12) with a torque wrench, and check again with a torque wrench after tightening to ensure that the top screw (12) is not loose and the rotating ball joint (8) is locked firmly, and the installation is completed.

10. The installation method of a prefabricated green and low-carbon curtain wall structure according to claim 9, characterized in that: In step S1, if the pre-embedded structural component (1) is found to be ineffective, a replacement component is used to fill the gap. The specific steps are as follows: Step S11: Use a metal detector to locate the position of the reinforcing bars inside the structural wall (4), and determine the drilling point by avoiding the reinforcing bars; use a water drill to drill vertically (the drill bit is perpendicular to the cross section of the component), the hole diameter is 2mm larger than the diameter of the rebar, and check the hole depth and hole diameter after drilling to ensure they are qualified. Step S12: First, use an air compressor to blow air into the hole 3-5 times to remove dust; then use a wire brush and cotton yarn to wipe the hole wall, and repeat blowing until there is no dust or debris; finally, use degreased cotton soaked in alcohol / acetone to wipe the hole wall, seal the hole to prevent foreign matter from entering, and ensure that the hole is clean and dry. Step S13: Use a glue gun to inject anchoring glue from the bottom of the hole into the hole, injecting glue to 2 / 3 of the hole depth; rotate the rebar or use a hand hammer to drive it into the hole, ensuring that a small amount of glue overflows around the perimeter after insertion, and let it stand until the anchoring glue cures. Step S14: Use low temperature brazing process to weld the bottom of the upturned keel hanging point (2) to the top of the rebar; after welding, let it stand for 24 hours, and use a pull-out tester to check the anchoring force of the rebar. Only after it passes the test can you proceed to the next step.

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