Anti-seismic closed channel machine room combined suspended ceiling

Abstract

The utility model discloses an anti-seismic closed channel machine room combined suspended ceiling which comprises a steel beam conversion system, a heavy keel hanging system and a suspended ceiling plate, the steel beam conversion system comprises a plurality of C-shaped steel channels, the heavy keel hanging system comprises a main keel and a secondary keel, and the main keel is connected with the steel beam conversion system through a connecting piece to form a double-layer framework. C-shaped steel channel beams are adopted to form a steel beam conversion system, flexible lap joint and downward hanging can be achieved, punching construction on a floor slab is eliminated, structural damage is reduced, meanwhile, the flexible and changeable hanging requirement of a data center is met, the rigidity of the overall structure is improved, and larger space is provided for installing various devices and pipelines. The multi-layer structural design of the system optimizes a mechanical transmission path, vibration and deformation are effectively reduced, and meanwhile the reliability and safety of the whole system can be improved.

Description

Technical Field

[0001] This utility model relates to the field of computer room construction technology, and in particular to a seismic-resistant enclosed passageway computer room combined ceiling. Background Technology

[0002] With the development of the Internet, cloud computing, and intelligent computing, data centers are becoming increasingly larger, and the complexity of integrated cabling within these rooms is rising. The types, specifications, and quantities of cable trays, conduits, and other wiring are becoming more diverse. At the same time, data centers are also major energy consumers, leading to increasingly stringent energy-saving requirements. To prevent airflow short-circuiting and effectively isolate hot and cold aisles, higher demands are being placed on ceiling enclosure.

[0003] In this context, traditional on-site fabrication methods involving hanging and ceiling installations can no longer meet the requirements of data center use. The numerous hanging rods and supports that require drilling holes in the floor slab for fixing can damage the building's floor structure. Fixed hanging methods cannot meet the needs of flexible cabling, and traditional ceilings are not conducive to hot and cold aisle insulation. Extensive on-site construction generates significant dust and environmental pollution, affecting the operation of installed equipment.

[0004] For example, the patent application "CN201920729263.4" published in Chinese patent literature, entitled "A Double-Layer Ceiling for a Data Center Computer Room", includes a threaded hanger, an upper ceiling plate, and a lower ceiling plate. The threaded hanger passes through the upper ceiling plate and is fixed by a nut. The upper ceiling plate includes a main keel, a secondary keel, and a snap-on plate. The secondary keel is located below the main keel and has an installation groove at its bottom. The snap-on plate has outer clamping plates rotatably mounted on both sides. An inner clamping plate is fixed on the inner side of the outer clamping plate. A spring is fixedly connected to the top of the outer clamping plate and the inner clamping plate. A threaded rod is fixed on the upper surface of the lower ceiling plate. The threaded rod is connected to the bottom of the threaded hanger through a connector.

[0005] While the above solution utilizes a double-layered ceiling structure, making installation and disassembly very convenient, it cannot simultaneously guarantee the ceiling's airtightness and earthquake resistance. Therefore, this solution needs further optimization. Utility Model Content

[0006] Addressing the issues mentioned in the background section regarding insufficient ceiling airtightness for hot and cold aisle isolation and complex structures in existing technologies, this utility model achieves an organic combination of high load-bearing capacity, flexible adaptability, good sealing, and seismic performance through innovative structural design and material selection. Its modular and standardized features not only meet the current needs of data centers but also reserve possibilities for future expansion and upgrades, providing a comprehensive solution for modern data center computer rooms.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An earthquake-resistant enclosed access room combined ceiling includes a steel beam conversion system, a heavy-duty keel suspension system, and a ceiling panel. The steel beam conversion system includes multiple C-shaped channel steels, and the heavy-duty keel suspension system includes a main keel and a secondary keel. The main keel is connected to the steel beam conversion system through connectors to form a double-layer frame.

[0009] The multi-layered support structure enhances the stability and load-bearing capacity of the overall system. The steel beam transfer system, composed of multiple C-channel steel beams, effectively distributes loads and strengthens the structure. The heavy-duty keel suspension system employs a primary and secondary keel design, forming a grid-like support structure that improves the seismic performance and load-bearing capacity of the ceiling system. The main keel and steel beam transfer system are connected by connectors, forming a double-layer frame. This design not only increases the overall structural rigidity but also provides more space for installing various equipment and pipelines. The multi-layered structural design optimizes the force transmission path, effectively reducing vibration and deformation, while simultaneously improving the overall system's reliability and safety.

[0010] Furthermore, in the steel beam transfer system, the C-channel steels are interconnected at staggered connection points to form a grid structure. Each C-channel steel is fixed to the secondary beam at at least four points, and adjacent C-channel steels are arranged at fixed intervals. This grid structure, by increasing the number of connection and fixing points, improves the overall performance of the system. Even if a problem occurs at a particular connection point or with a C-channel steel, the entire system remains stable. The grid structure can distribute loads more evenly, reduce local stress concentration, and the multi-point fixing increases the structural stiffness, raising the natural frequency and thus improving seismic performance.

[0011] Furthermore, the main and secondary keels are arranged perpendicularly to each other. The main keel is fixed to the steel beam conversion system via hangers or stiffeners, while the secondary keels are fixed to the main keel via "+" or "T" type connectors. The heavy-duty keel suspension system adopts an orthogonal grid structure, improving the overall performance of the system through the vertical arrangement and multi-point fixing of the main and secondary keels. This structure not only increases lateral stiffness but also enhances the system's torsional resistance. According to Saint-Venant's torsional theory, the torsional stiffness of a closed section is much greater than that of an open section; therefore, this connection method can significantly improve the system's torsional performance. It not only improves load-bearing capacity and stability but also provides more options for equipment installation and pipeline layout. It is suitable for data center environments with high requirements for equipment layout flexibility and complex loads.

[0012] Furthermore, the heavy-duty keel suspension system utilizes double-sided C-channel steel for the main keel and single-sided C-channel steel for the secondary keel. The main keel surface features multiple pre-drilled holes that connect to hangers, cable trays, and cable trays. The double-sided C-channel steel main keel offers higher bending stiffness and load-bearing capacity than the single-sided C-channel steel. The multiple pre-drilled holes on the main keel surface provide high flexibility and adjustability, allowing the system to adapt to different equipment layouts and pipeline requirements. The pre-drilled hole design simplifies on-site installation, reduces drilling operations, and improves construction efficiency and accuracy. This differentiated design of the main and secondary keels enhances both the strength and flexibility of the support system, improving load-bearing capacity and stability, and providing more options for equipment installation and pipeline layout.

[0013] Furthermore, the ceiling panels are made of one-piece molded aluminum or calcium silicate boards, connected to the main and secondary keels via snap-fit ​​mechanisms. Sealing strips are installed along the edges of the ceiling panels to fit snugly against the keels. The selection of aluminum or calcium silicate boards balances lightweight design with strength requirements. The one-piece molding process ensures the integrity and dimensional accuracy of the panels, reducing seams and improving the ceiling's sealing performance. This solution not only simplifies the installation process but also provides disassembly for easy maintenance and further enhances the system's airtightness. While ensuring structural stability, it effectively controls the flow of hot and cold air, improving the energy efficiency ratio of the computer room and achieving better sealing and higher installation efficiency, making it particularly suitable for data center computer rooms with stringent environmental control requirements. Simultaneously, the integrated design and precise connections enhance the overall aesthetics, meeting the appearance requirements of modern data centers.

[0014] Furthermore, the main keel is fixed to the steel beam conversion system via threaded rods, which are equipped with seismic bracing hangers fixedly connected to the ground. The use of threaded rods allows for precise vertical adjustment, ensuring the levelness and flatness of the ceiling system. The configuration of seismic bracing hangers significantly improves the system's seismic performance. By being fixedly connected to the ground, a closed force transmission path is formed, effectively reducing the impact of seismic loads on the ceiling system. This not only enhances the overall structural stability but also simplifies the implementation of seismic measures, avoiding the complexity of configuring individual seismic supports for each hanging component.

[0015] Furthermore, the connectors include tube bundles and anchor bolts. The tube bundles secure the connection between the C-channel steel and the main keel, while the anchor bolts secure the connection between the C-channel steel and the secondary beams. The use of tube bundles allows for an adjustable connection between the C-channel steel and the main keel, facilitating fine-tuning during on-site installation and ensuring the flatness and stability of the overall structure. The anchor bolts provide a robust connection between the C-channel steel and the secondary beams of the building structure, enhancing the load-bearing capacity and seismic performance of the entire system. This dual connection method also forms a closed force transmission path, effectively distributing the load and reducing stress concentration. Simultaneously, the standardized connector design simplifies the installation process, improving construction efficiency and system maintainability.

[0016] Furthermore, adjustable connectors are installed between the main keel and the secondary keel. These connectors can slide along the length of the keel to adjust the distance between adjacent keels. This adjustable connection structure is capable of handling construction errors and building deformations. Allowing for minor displacements can effectively reduce internal stress concentration, improve the overall structural stability, enhance the system's adaptability, meet the needs of different equipment layouts and load distributions, and provide greater flexibility and precision.

[0017] Furthermore, elastic sealing material is used at the connection points between the ceiling panels and the main and secondary keels, filling the gaps between the edges of the ceiling panels and the keels. This sealing design effectively reduces the exchange and leakage of hot and cold air, thereby improving the separation of hot and cold aisles. The use of elastic material also absorbs vibration and reduces noise transmission. Compared to traditional simple overlaps or rigid seals, this elastic sealing design offers better adaptability and sealing performance, making it particularly suitable for data center server rooms with stringent environmental control requirements. Simultaneously, this solution facilitates later maintenance and replacement, improving system maintainability and lifespan. Overall, this sealing solution not only improves the energy efficiency ratio of the server room but also enhances the operating environment of the equipment, playing a positive role in extending equipment lifespan and reducing operating costs.

[0018] Therefore, this utility model has the following beneficial effects:

[0019] The steel beam conversion system is composed of C-shaped steel beams, which enables flexible overlapping and hanging, eliminating the need for drilling into the floor slab, reducing structural damage, and meeting the flexible and varied hanging requirements of the data center.

[0020] The heavy-duty keel adopts a C-shaped steel perforated design, which allows the position of the hanger to be moved flexibly. Therefore, it can meet the hanging requirements of cable trays, channels and pipelines in any position, significantly improving the adaptability of the system.

[0021] The ceiling panels are manufactured using a one-piece molding process and are designed with sealing strips, which significantly improves the airtightness of the ceiling system, thereby effectively improving the isolation effect of hot and cold aisles and enhancing the energy efficiency of the data center.

[0022] The system is equipped with seismic resistance, which eliminates the need to set up seismic supports for each hanging component, simplifies the installation process, and improves the overall seismic performance and safety. Attached Figure Description

[0023] Appendix Figure 1 This is a plan view of the present invention.

[0024] Appendix Figure 2 for Figure 1 A cross-sectional view at point AA.

[0025] Appendix Figure 3 for Figure 1 A cross-sectional view of section BB.

[0026] Appendix Figure 4 for Figure 2 A plan view of a medium-to-heavy-duty keel ceiling system.

[0027] In the diagram: 1. Steel beam conversion system; 2. Heavy-duty keel suspension system; 3. Ceiling panel; 4. C-channel steel; 5. Main keel; 6. Secondary keel; 7. Connector; 8. "+" type connector; 9. "T" type connector; 10. Precast hole; 11. Cable tray; 12. Concrete floor slab; 13. Concrete beam; 14. Adjustable connector; 15. Fully threaded rod; 16. Seismic bracing; 17. Anchor bolt. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] like Figure 1 , 2As shown in Figure 3, this utility model proposes a combined suspended ceiling for an earthquake-resistant enclosed access room. It achieves a highly integrated and modular design through the combination of a steel beam conversion system 1, a heavy-duty keel suspension system 2, a ceiling panel 3, and various connectors 7. Concrete beams 13 are installed on the concrete floor slab 12, and the steel beam conversion system 1 is installed on the concrete beams 13. The steel beam conversion system 1 is composed of C-shaped channel steel 4, and can flexibly select single or multiple splicing methods according to load requirements. It is fixedly connected to the main building structure through fasteners and anchor bolts 17 to form a stable foundation support frame. This embodiment not only avoids drilling into the floor slab but also provides great flexibility in layout. The heavy-duty keel suspension system 2 adopts a double-layer frame design. The main keel 5 uses double-splitting C-shaped channel steel 4, and the secondary keel 6 uses single-sided C-shaped channel steel 4. Adjustable connectors 14 achieve adjustable connection between the main and secondary keels 6, which not only improves the overall load-bearing capacity but also adapts to the needs of different equipment layouts and load distributions. The pre-drilled holes 10 on the surface of the C-shaped channel steel 4 further increase the flexibility of the system, allowing the cable tray 11, channel and pipeline to be installed at any position.

[0031] The ceiling panel 3 is made of one-piece molded aluminum or calcium silicate board, with interlocking connection and edge sealing strip design, which improves the airtightness and overall aesthetics of the ceiling system. It not only improves the isolation effect of hot and cold aisles, but also improves the energy efficiency of the computer room. In addition, the overall seismic function of the system is fixed to the ground through the seismic support bracket 16 to form a closed force transmission path, which effectively reduces the impact of seismic load on the ceiling system, while avoiding the complexity of configuring seismic brackets for each hanging component separately.

[0032] like Figure 4 As shown, in this embodiment, the selection of C-shaped channel steel 4 fully utilizes its high bending stiffness. The moment of inertia of the double-section C-shaped channel steel 4 main keel 5 is approximately twice that of the single-sided C-shaped channel steel 4, meaning that under the same load, the deformation is only half that of the single-sided structure. The adjustable connection design used in the system allows for small displacements, effectively reducing internal stress concentration and improving the overall structural stability. The elastic sealing design between the ceiling panel 3 and the keel significantly reduces the exchange and leakage of hot and cold air, while reducing gaps effectively reduces airflow and improves the separation effect of hot and cold channels. All C-shaped channel steel 4 and accessories are prefabricated in the factory. The connection between the connector 7 and the C-shaped channel steel 4 adopts a toothed mechanical interlocking method with a tooth depth of not less than 0.9mm to ensure the reliability of the connection. This solution not only reduces on-site construction and improves installation efficiency but also ensures the quality stability of the entire system. Compared with traditional on-site processing and simple overlapping methods, this prefabricated and standardized design significantly improves construction accuracy and efficiency, reduces human error, and facilitates later maintenance and system upgrades.

[0033] Specifically, in this embodiment, the steel beam conversion system 1 serves as the fundamental support for the entire structure and is constructed using C-shaped channel steel 4. The C-shaped channel steel 4 can be 41x41mm or 41x82mm in size, with a wall thickness of no less than 2.0mm, ensuring sufficient strength and rigidity. Depending on the actual stress conditions, single or multiple C-shaped channel steel 4 sections can be spliced ​​together. The system is typically installed at intervals of 0.6m, generally one section every 1.2m, ensuring load-bearing capacity while avoiding over-design. The steel beam conversion system 1 is fixed to the main building structure (beams or walls) using fasteners and anchor bolts 17. Two or four fixing points can be set depending on the stress conditions, providing flexible installation options.

[0034] The heavy-duty keel suspension system 2 adopts a double-layer design. The main keel 5 uses 41x82mm double-sided C-channel steel 4, and the secondary keel 6 uses 41x41mm single-sided C-channel steel 4. The main keel 5 and secondary keel 6 are set perpendicular to each other. The main keel is fixed to the steel beam conversion system by hangers or stiffeners, and the secondary keel is fixed to the main keel 5 by "+" type connectors 8 or "T" type connectors 9. The main keel 5 is fixed to the steel beam conversion system 1 by threaded rods 15 or stiffeners, forming vertical support. In the horizontal direction, the keels are also set at intervals of multiples of 0.6m. The connection between the C-channel steel 4 and all connectors 7 adopts a toothed mechanical interlocking method with a tooth depth of not less than 0.9mm to ensure the reliability and durability of the connection. The system is also equipped with seismic bracing, which can be used in both vertical and horizontal directions, significantly improving the seismic performance of the entire system. This solution avoids the complexity of configuring seismic supports separately for each suspension component, simplifies the installation process, and improves the overall seismic effect. Ceiling panel 3 is made of aluminum or calcium silicate board, manufactured using a cold stamping process to ensure the precision and aesthetics of its right-angled edges. The panels undergo electrostatic powder coating, which not only improves surface durability but also ensures fire resistance meets Class A requirements. Ceiling panel 3 can be installed and removed individually for easy maintenance and replacement. The entire system forms a sealed space suitable for air conditioning supply or return air, optimizing airflow. The prefabricated support and hanger system also includes an interface with the micro-module enclosed channel, further refining airflow organization.

[0035] This integrated and modular design not only improves the overall performance of the system but also significantly enhances installation efficiency and engineering standardization. The engineered prefabrication scheme and standardized connectors significantly reduce on-site fabrication and accelerate project progress. The system's flexibility allows it to adapt to the complex and varied hanging requirements of data center server rooms while ensuring a high degree of airtightness and aesthetics.

[0036] It is also worth noting that when implementing this seismic-resistant enclosed corridor combined ceiling system for the data center, an overall plan must first be developed based on the specific requirements and layout of the data center. The system installation process can be divided into the following main steps:

[0037] First, install the steel beam conversion system 1. This step requires selecting appropriate C-channel steel 4 (41x41mm or 41x82mm) based on the structure and load requirements of the computer room, and determining their spacing, typically in multiples of 0.6m, generally one steel channel every 1.2m. During installation, fasteners and anchor bolts 17 are used to fix the C-channel steel 4 to the main building structure. Two or four fixing points can be set depending on the stress conditions. During this process, special attention must be paid to the horizontal and vertical alignment of the C-channel steel 4 to ensure the accuracy of subsequent installation.

[0038] Next, install the heavy-duty keel suspension system 2. This system adopts a double-layer design. The main keel 5 uses 41x82mm double-sided C-channel steel 4, and the secondary keel 6 uses 41x41mm single-sided C-channel steel 4. During installation, first, the main keel 5 is fixed to the steel beam conversion system 1 using threaded rods 15 or suspension rods to form vertical support. Then, the secondary keels 6 are installed horizontally, also at intervals of multiples of 0.6m. During this process, special attention needs to be paid to the connection between the keels, using a toothed mechanical interlocking method to ensure that the tooth depth is not less than 0.9mm, so as to guarantee the reliability and durability of the connection.

[0039] The third step is to install seismic bracing. These braces can be installed in both vertical and horizontal directions to improve the overall seismic performance of the system. During installation, it is necessary to ensure that the braces form an effective force transmission path with the main structure, while avoiding interference with other equipment and pipelines.

[0040] The final step is to install ceiling panel 3. Ceiling panel 3 is made of aluminum or calcium silicate board, manufactured using a cold stamping process. During installation, ceiling panel 3 needs to be interlocked with the main keel 5 and secondary keel 6, and sealing strips should be used at the edges to ensure good airtightness. During this process, attention should be paid to the flatness and alignment of ceiling panel 3 to ensure overall aesthetics.

[0041] In practical applications, this system can be optimized and adjusted according to specific needs. For example, for particularly high load requirements, larger C-channel steel 4 can be used or the number of support points can be increased. For special seismic requirements, the number of seismic braces can be increased or their angles adjusted. Regarding the selection of ceiling panels 3, different materials or surface treatments can be chosen based on the specific environmental requirements of the computer room to meet special needs such as fire resistance and anti-static properties.

[0042] From an engineering practice perspective, the modular design and factory prefabrication of this system can significantly improve construction efficiency and reduce on-site construction errors. For example, traditional ceiling systems may require extensive on-site cutting and adjustments, while the prefabricated components of this system can be directly assembled, significantly shortening the construction cycle. Simultaneously, standardized connection methods simplify the installation process, reduce the skill requirements for construction personnel, and help ensure consistent construction quality. Furthermore, the system's airtight design plays a crucial role in optimizing airflow organization within the data center. By effectively isolating hot and cold aisles, cooling efficiency can be significantly improved, and energy consumption reduced. According to the laws of heat conduction, reducing the mixing of hot and cold air can decrease heat exchange, thereby improving the efficiency of the cooling system. At the same time, the system's modular design also allows for flexibility in future layout adjustments or equipment upgrades, which is clearly a fundamental guarantee for the long-term operation and optimization of the data center.

[0043] In summary, the earthquake-resistant enclosed corridor ceiling system achieves an organic combination of high load-bearing capacity, flexible adaptability, good sealing and seismic performance through innovative structural design and material selection, providing a comprehensive solution for modern data center computer rooms.

[0044] Example 2

[0045] This embodiment optimizes Embodiment 1, primarily focusing on improvements to the heavy-duty keel suspension system 2 and ceiling panel 3 to further enhance the system's load-bearing capacity, flexibility, and airtightness. The optimized heavy-duty keel suspension system 2 employs a three-layer keel design, including a main keel 5, secondary keels 6, and auxiliary keels. The main keel 5 uses 51x102mm reinforced C-channel steel 4, with a wall thickness increased to 2.5mm, significantly improving the system's load-bearing capacity. The secondary keel 6 still uses 41x82mm double-section C-channel steel 4, while the newly added auxiliary keel uses 30x30mm L-shaped angle steel. This three-layer keel design not only improves the overall rigidity of the system but also increases the density of suspension points, allowing the system to more flexibly meet the suspension requirements of various cable trays 11, channels, and pipelines. The main keel 5 is fixed to the steel beam conversion system 1 via threaded rods 15 or suspension bars, forming vertical support. In the horizontal direction, secondary keels 6 are spaced at multiples of 0.6m, while auxiliary keels are placed every 0.3m between the secondary keels 6. This dense arrangement further enhances the system's load-bearing capacity and stability. The connection between the C-channel steel 4 and all connectors 7 adopts an improved double-tooth mechanical interlocking method, with the tooth depth increased to 1.2mm, further improving the reliability and durability of the connection. Regarding the ceiling panel 3, this embodiment uses a composite material ceiling panel 3, composed of aluminum honeycomb core material and high-strength fiber-reinforced resin panel. This composite material ceiling panel 3 has a higher strength / weight ratio, reducing overall weight while maintaining strength. The ceiling panel 3 is 25mm thick, with a special locking design at the edges, allowing for a tight connection with the main keel 5 and secondary keels 6. The locking design also integrates a flexible sealing strip, further improving the system's airtightness. The surface of the ceiling panel 3 is coated with a nano-level antistatic coating, which not only improves fire resistance but also effectively prevents static electricity accumulation, meeting the special requirements of data centers. Furthermore, this embodiment has also optimized its seismic design. Dynamic dampers are added to the existing vertical and horizontal seismic bracing. Installed at the connection between the main keel 5 and the steel beam transfer system 1, the dynamic dampers absorb some of the seismic energy during an earthquake, further improving the system's seismic performance. Made of viscoelastic material, the dynamic dampers provide effective damping under vibrations of different frequencies. This solution not only improves the system's stability under strong earthquakes but also effectively reduces the impact of daily micro-vibrations on the equipment. During installation, the steel beam transfer system 1 is first installed according to the method in Example 1. Then, the optimized three-layer keel system is installed, ensuring the verticality and horizontality between each layer. Next, the dynamic dampers are installed, ensuring a secure and reliable connection between them and the main keel 5 and the steel beam transfer system 1. Finally, the composite material ceiling panels 3 are installed, ensuring proper alignment of the locking mechanisms and the integrity of the sealing strips.This optimized design not only improves the overall performance of the system but also simplifies the installation process and reduces on-site construction errors. This improved design better meets the data center's requirements for high load-bearing capacity, high airtightness, and high seismic resistance, while maintaining system flexibility and maintainability. In particular, the application of composite ceiling panels 3 not only improves system performance but also reduces overall weight, helping to alleviate the burden on the building structure. The introduction of dynamic dampers provides a higher level of equipment protection for the data center, especially in earthquake-prone areas, significantly improving the data center's safety and reliability.

Claims

1. A seismic-resistant enclosed passageway combined ceiling system for machine rooms, characterized in that, It includes a steel beam conversion system, a heavy-duty keel suspension system, and a ceiling panel. The steel beam conversion system includes multiple C-shaped channel steels, and the heavy-duty keel suspension system includes main keels and secondary keels. The main keels are connected to the steel beam conversion system through connectors to form a double-layer frame.

2. The combined suspended ceiling according to claim 1, characterized in that, In the steel beam conversion system, the C-shaped channel steels are fixed to each other through staggered connection points to form a grid structure. Each C-shaped channel steel is fixedly connected to the secondary beam through at least four points, and adjacent C-shaped channel steels are arranged at a fixed interval.

3. The combined suspended ceiling according to claim 1, characterized in that, The main keel and secondary keel are set perpendicular to each other. The main keel is fixed to the steel beam conversion system by hangers or stiffeners, and the secondary keel is fixed to the main keel by "+" or "T" type connectors.

4. The combined suspended ceiling according to claim 3, characterized in that, The main keel of the heavy-duty keel suspension system uses double-sided C-shaped channel steel, while the secondary keel uses single-sided C-shaped channel steel. The surface of the main keel has multiple pre-drilled holes, which are connected to the hangers / cable trays / channels.

5. The combined suspended ceiling according to claim 1, characterized in that, The ceiling panels are made of one-piece molded aluminum or calcium silicate boards. The ceiling panels are connected to the main / secondary keel by fasteners, and the edges of the ceiling panels are equipped with sealing strips.

6. The combined suspended ceiling according to claim 3, characterized in that, The main keel is fixed to the steel beam conversion system by threaded rods, and the threaded rods are equipped with seismic bracing and hangers, which are fixedly connected to the ground.

7. The combined suspended ceiling according to claim 3, characterized in that, The connecting components include tube bundles and anchor bolts. The tube bundles fix the connection between the C-shaped channel steel and the main keel, and the anchor bolts fix the connection between the C-shaped channel steel and the secondary beam.

8. The combined suspended ceiling according to claim 3, characterized in that, An adjustable connector is provided between the main keel and the secondary keel. The adjustable connector can slide along the length of the keel to adjust the distance between adjacent keels.

9. The combined suspended ceiling according to claim 5, characterized in that, Elastic sealing material is provided at the connection between the ceiling panel and the main keel and secondary keel, and the elastic sealing material fills the gap between the edge of the ceiling panel and the keel.

Images