Cavity cable two-way cable-strut grid structure

Abstract

The present application relates to the field of building structure and heating and ventilation pipeline technology, and particularly relates to a cavity cable two-way cable-stayed grid structure, which comprises a cavity cable, and an upper chord layer arranged above the cavity cable, wherein the upper chord layer comprises a plurality of upper chord beams arranged in a cross shape; the cavity cable comprises a plurality of longitudinal cavity cables and a plurality of transverse cavity cables, and the plurality of longitudinal cavity cables and the plurality of transverse cavity cables are arranged in a one-to-one correspondence with the upper chord beams and are spliced into a lower chord layer in a cross shape; an internal node is arranged at each intersection of the plurality of longitudinal cavity cables and the plurality of transverse cavity cables, and the internal node is connected to the upper chord beam through a vertical support rod; and the two ends of the longitudinal cavity cable and the two ends of the transverse cavity cable are respectively connected to the end of the upper chord beam through a boundary node. The cavity cable, the internal node and the boundary node form a distributed network integrating structural force bearing and fluid conveying, and the functional integration of the building structure and the heating and ventilation system is realized.

Description

Technical Field

[0001] This invention relates to the fields of building structure and HVAC piping technology, and in particular to a cavity cable bidirectional tensioned mesh structure. Background Technology

[0002] With the development of modern agricultural technology, large greenhouses are playing an increasingly important role in planting and production in high-altitude and cold regions such as Xinjiang. These greenhouses typically employ large-span spatial structures to provide ample space and natural lighting for crop growth. The two-way tensioned cable network structure, through a combination of upper chord beams, lower chords, and intermediate struts, achieves good structural stability. As a type of tensioned integral structure, the two-way tensioned cable network structure is widely used in the construction of large-span greenhouse roofs due to its safety and economic advantages.

[0003] However, there are some limitations in using bidirectional tensioned cable network structures as the roof structure for large-span greenhouses, particularly in terms of indoor temperature control. For example, in cold regions during winter, heating within the greenhouse becomes crucial for crop growth. Currently, common heating methods often employ traditional air conditioning systems or floor heating systems. These systems tend to occupy valuable planting space, increase construction and operating costs, and uneven heat distribution can easily lead to localized overheating or insufficient temperature. Furthermore, the cables in traditional tensioned cable structures only bear the structural tension function and fail to integrate with the temperature control requirements of the greenhouse, thus reducing overall energy efficiency and space utilization efficiency.

[0004] Therefore, there is an urgent need for a cavity cable bidirectional tensioned grid structure that can integrate environmental control functions to achieve a solution that integrates greenhouse structure and HVAC while maintaining structural performance. Summary of the Invention

[0005] The purpose of this invention is to provide a cavity cable bidirectional tensioned mesh structure to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: a hollow cable bidirectional tensioned grid structure, comprising hollow cables, an upper chord layer above the hollow cables, the upper chord layer comprising multiple upper chord beams arranged in a grid pattern; the hollow cables comprising multiple longitudinal hollow cables and multiple transverse hollow cables, the multiple longitudinal hollow cables and multiple transverse hollow cables being respectively arranged one-to-one with the upper chord beams and spliced ​​in a grid pattern to form a lower chord layer; each intersection of the multiple longitudinal hollow cables and the multiple transverse hollow cables is provided with an internal node, the internal node being connected to the upper chord beams through vertical struts, and the two ends of the longitudinal hollow cables and the two ends of the transverse hollow cables being respectively connected to the ends of the upper chord beams through boundary nodes.

[0007] Preferably, the upper chord beam is arc-shaped, and the height of the midpoint of the upper chord beam is higher than the height of both ends of the upper chord beam.

[0008] Preferably, the cavity cable has a through-flow fluid channel inside.

[0009] Preferably, the internal node includes a first intermediate component, the first intermediate component has a first cavity, the top surface of the first intermediate component is fixedly connected to a support rod interface, the support rod interface is threadedly connected to the vertical support rod, and the end of the first intermediate component opposite to the support rod interface is connected to an output interface.

[0010] Preferably, the first intermediate component has multiple internal cable interfaces in its circumferential direction, and the multiple internal cable interfaces are equally spaced on the first intermediate component and connected to the first cavity.

[0011] Preferably, each of the internal cable interfaces is connected to the corresponding longitudinal cavity cable or the transverse cavity cable via a first adapter.

[0012] Preferably, the boundary node includes a second intermediate component, which has a second cavity. A beam interface is fixedly connected to the side of the second intermediate component facing the upper chord beam, and the beam interface is connected to the end of the upper chord beam.

[0013] The present invention discloses the following technical effects: This invention uses multiple longitudinal and transverse cavity cables to form a grid-like lower chord layer, making the cavity cables the lower chord components of a bidirectional tensioned cable network structure. Through internal nodes and boundary nodes, a distributed network integrating structural load-bearing and fluid transport is formed, realizing the functional integration of building structure and HVAC system.

[0014] This invention integrates HVAC ducts with load-bearing structures, significantly improving the space utilization efficiency inside buildings, eliminating the need for independent piping systems, and reducing construction and operating costs. At the same time, the upper chord beam and multiple longitudinal and transverse cavity cables are arranged in a grid pattern, allowing the temperature-controlled fluid to flow and distribute evenly throughout the entire roof plane, effectively avoiding local overheating or overcooling and improving the uniformity and comfort of environmental control.

[0015] This invention is particularly suitable for large-span spatial buildings such as large greenhouses and stadiums. While ensuring structural safety and economy, it also provides an efficient and energy-saving environmental control solution. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view schematic diagram of the cavity cable structure of the present invention; Figure 3 This is a schematic diagram of the boundary node structure of the present invention; Figure 4 This is a schematic diagram of the internal node structure of the present invention; Figure 5 This is a schematic diagram of the internal nodes and vertical strut connection structure of the present invention; Figure 6 This is a schematic diagram of the internal node and cavity cable connection structure of the present invention; Figure 7 This is a schematic diagram of the overall structure in Embodiment 2 of the present invention; Figure 8 This is a schematic diagram of the internal structure in Embodiment 2 of the present invention; Figure 9 The average temperature at different heights inside Embodiment 2 of the present invention; Among them, 1. Upper chord beam; 2. Cavity cable; 3. Vertical strut; 4. Node connector; 21. Longitudinal cavity cable; 22. Transverse cavity cable; 41. Boundary node; 411. Input interface; 412. Boundary cable interface; 413. Beam interface; 414. Boundary interface; 42. Internal node; 421. Output interface; 422. Internal cable interface; 423. Stirrer interface. Detailed Implementation

[0018] 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.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1 Reference Figures 1 to 6This invention provides a hollow cable bidirectional tensioned grid structure, including a hollow cable 2, an upper chord layer above the hollow cable 2, the upper chord layer including multiple upper chord beams 1 arranged in a grid pattern; the hollow cable 2 includes multiple longitudinal hollow cables 21 and multiple transverse hollow cables 22, the multiple longitudinal hollow cables 21 and multiple transverse hollow cables 22 are respectively arranged one-to-one with the upper chord beams 1 and spliced ​​in a grid pattern to form the lower chord layer; each intersection of the multiple longitudinal hollow cables 21 and the multiple transverse hollow cables 22 is provided with an internal node 42, the internal node 42 is connected to the upper chord beam 1 through a vertical strut 3, and the two ends of the longitudinal hollow cables 21 and the two ends of the transverse hollow cables 22 are respectively connected to the ends of the upper chord beam 1 through boundary nodes 41.

[0021] Reference Figures 3 to 4 The node connector 4 is the core component for realizing the integration of structure and function. According to its position and function in the structure, the node connector 4 is mainly divided into boundary nodes 41 distributed around the structure and internal nodes 42 distributed inside the structure. The node connector 4 has a cavity inside, which allows the fluid channels inside all the cavity cables 2 connected to it to be interconnected, thereby forming a continuous distributed fluid transport network covering the entire structural plane in the entire lower chord layer.

[0022] The node connector 4 is formed by multiple internal nodes 42 and multiple boundary nodes 41. The longitudinal cavity cable 21 and the transverse cavity cable 22 are connected at the intersection nodes by the node connector 4 to form a mesh gas distribution channel.

[0023] Meanwhile, the node connector 4 not only enables the upper chord layer to be effectively connected to the lower chord layer, but also allows multiple longitudinal cavity cables 21 and multiple transverse cavity cables 22 to be interconnected, which not only facilitates fluid transportation, but also effectively improves the space utilization efficiency inside the building and eliminates the need for the installation of an independent piping system.

[0024] This invention splices multiple longitudinal cavity cables 21 and multiple transverse cavity cables 22 in a grid pattern to form a lower chord layer, making the cavity cables 2 the lower chord components of a bidirectional tensioned cable network structure. Through internal nodes 42 and boundary nodes 41, a distributed network integrating structural load-bearing and fluid transport is formed, realizing the functional integration of building structure and HVAC system.

[0025] This invention integrates HVAC ducts with load-bearing structures, significantly improving the space utilization efficiency inside buildings, eliminating the need for independent piping systems, and reducing construction and operating costs. At the same time, the upper chord beam 1 and multiple longitudinal cavity cables 21 and multiple transverse cavity cables 22 are arranged in a grid pattern, allowing the temperature-controlled fluid to flow and distribute evenly throughout the entire roof plane, effectively avoiding local overheating or overcooling, and improving the uniformity and comfort of environmental control.

[0026] This invention is particularly suitable for large-span spatial buildings such as large greenhouses and stadiums. While ensuring structural safety and economy, it also provides an efficient and energy-saving environmental control solution.

[0027] Further optimization of the design involves an arc-shaped upper chord beam 1, with the midpoint of the upper chord beam 1 being higher than the heights of its two ends. The upper chord beam 1 is a rigid member, and the upper chord beams 1 are rigidly connected to each other via U-shaped clamps to form a stable upper chord layer, making the upper chord layer the main compression-bending member of the structure.

[0028] The design has been further optimized by incorporating a through-flow fluid channel within the cavity cable 2 to facilitate fluid circulation.

[0029] The cavity cable 2 is made of high-strength flexible composite material. The cavity cable 2 has a through fluid channel inside. The cavity cable 2 is arranged orthogonally in both directions in the structure and then connected to each other through the node connector 4 to form a pre-tensioned lower chord layer, which bears the tensile force of the structure and constitutes a fluid transport network.

[0030] In a further optimized design, the internal node 42 includes a first intermediate component, which has a first cavity. A strut interface 423 is fixedly connected to the top surface of the first intermediate component. The strut interface 423 is threadedly connected to the vertical strut 3. An output interface 421 is connected to the end of the first intermediate component facing away from the strut interface 423.

[0031] During installation, first screw the vertical strut 3 into the strut interface 423, and then weld the end of the vertical strut 3 away from the strut interface 423 to the upper chord beam 1.

[0032] The upper and lower chord layers are connected by vertical struts 3, forming a self-balancing, efficient spatial bidirectional tensioned chord system.

[0033] The internal node 42 has one output interface 421, four internal cable interfaces 422, and one strut interface 423. The output interface 421 is used to uniformly release the fluid in the network into the interior space of the building to achieve environmental control; the internal cable interfaces 422 are used for the flow of fluid in the internal network of the structure; and the strut interface 423 is used to connect the end of the vertical strut 3 away from the upper chord beam 1.

[0034] A spatial force transmission system is formed by using a combination of welding and threaded connections between the two ends of the vertical strut 3 and the U-shaped clamp of the upper chord layer and the node connector 4 of the lower chord layer.

[0035] Output interface 421 is used to uniformly distribute fluid into the building space.

[0036] To further optimize the design, the first intermediate component is provided with multiple internal cable interfaces 422 in the circumferential direction. The multiple internal cable interfaces 422 are equally spaced on the first intermediate component and are connected to the first cavity.

[0037] In a further optimized design, each internal cable interface 422 is connected to the corresponding longitudinal cavity cable 21 or transverse cavity cable 22 via a first adapter.

[0038] In a further optimized scheme, the boundary node 41 includes a second intermediate component, which has a second cavity. A beam interface 413 is fixedly connected to the side of the second intermediate component facing the upper chord beam 1, and the beam interface 413 is connected to the end of the upper chord beam 1.

[0039] A boundary node 41 has an input interface 411, a boundary cable interface 412, a beam interface 413, and two boundary interfaces 414. The input interface 411 is used to connect external fluid delivery equipment, serving as the fluid inlet for the entire system; the boundary cable interface 412 is used to introduce fluid into the network inside the structure; the beam interface 413 is used to connect the upper chord beam; and the boundary interfaces 414 are used to connect the cavity cable bidirectional tensioned chord network structure into an integral roof structure.

[0040] The first and second intermediate components can be in the shape of a sphere, a cube, or similar shapes; the first and second adapters are socket-type connectors, which are used to achieve connection and sealing.

[0041] This invention introduces temperature-controlled fluid into a distributed fluid delivery network, uses cavity cables 2 to transmit the fluid, and achieves uniform distribution of the fluid through the output interface 421 on the node connector 4, thereby heating, cooling, or ventilating the interior space of a building.

[0042] Connection method of internal node 42: Reference Figure 5 The cavity cable 2 and the node connector 4 are connected by a socket-type sealing joint. Specifically, after the internal cable interface 422 of the internal node 42 is connected to the cavity cable 2 via the socket-type joint, it is then bonded, fixed, and sealed using high-strength, aging-resistant sealant. This connection method effectively transmits the prestress within the cable and ensures that no fluid leakage occurs during transport.

[0043] according to Figure 6The vertical strut 3 is connected at both ends using both welding and threaded connections. Specifically, the upper end of the vertical strut 3 is reliably connected to the U-shaped clamp of the upper chord layer by welding; the lower end of the vertical strut 3 is machined with external threads and is connected to the strut interface 423 of the internal node 42 by threaded engagement, while the strut interface 423 is provided with internal threads. This composite connection method ensures both the rigidity and force transmission efficiency of the upper node and provides the necessary structural adjustment capability through the threaded connection at the lower end, facilitating construction, installation, and the application of prestress.

[0044] Example 2 Reference Figures 1 to 9 Based on Example 1, the specific implementation process for a greenhouse in a high-altitude, cold region is as follows: The greenhouse is 20 meters long, 20 meters wide, and 3.5 meters high.

[0045] Based on the greenhouse's design load and geometric dimensions, the arrangement of the cavity cable-stayed bidirectional tensioned grid structure is determined. The roof structure is formed by interlacing 3 longitudinal and 3 transverse tensioned units, i.e., the number of longitudinal units m=3 and the number of transverse units n=3. Based on this calculation, a total of 12 boundary nodes 41 are required around the structure, and a total of 9 internal nodes 42 and 9 vertical struts 3 are required inside the structure.

[0046] During construction, a rigid upper chord grid consisting of upper chord beam 1 and U-shaped clamps is first assembled on the ground and then lifted and fixed to the design elevation. Next, boundary nodes 41 and internal nodes 42 are installed. Then, longitudinal cavity cables 21 and transverse cavity cables 22 are laid and connected one by one to the boundary cable interfaces 412 and internal cable interfaces 422 on the nodes using socket joints to form the lower chord layer. Finally, vertical struts 3 are installed, with their upper ends welded to the U-shaped clamps of the upper chord layer and their lower ends threadedly connected to the strut interfaces 423 of the internal nodes 42.

[0047] After all components are installed in place, hydraulic tensioning equipment is used to apply prestress to the cavity cables in batches and simultaneously, so that the entire structural system establishes the design pretension and forms a stable spatial force grid.

[0048] Then, the main air supply duct of the external hot air unit of the greenhouse is connected to the input interface 411 of all boundary nodes 41 via flanges. During winter operation, the hot air unit generates hot air at a temperature of 313K (approximately 40°C). The hot air enters from the input interface 411 and flows through the distributed fluid transport network formed by the internal cavities of all cavity cables 2 and node connectors 4. During this process, the hot air is evenly and slowly released into the interior space of the greenhouse through the output interface 421 on the internal node 42.

[0049] Reference Figures 7 to 8To verify the actual heating effect of the present invention, the above-mentioned greenhouse model was simulated.

[0050] The simulation conditions were: outdoor ambient temperature 268K (-10℃), initial indoor temperature 283K (10℃), hot air input temperature 308K (35℃), and simulation duration 60 minutes.

[0051] Simulation results refer to Figure 9 After the system had been running for 60 minutes, the average temperature inside the greenhouse (the crop growth area 1.5m above the ground) reached 301.1K (28.1℃), and the average maximum temperature difference between each plane in the space did not exceed 1K. This proves that the invention achieves excellent heat dissipation through a distributed network, effectively avoiding local overheating and temperature dead zones caused by traditional point heating.

[0052] This solution fully integrates the heating system into the roof's load-bearing structure, without occupying any ground-level planting space, significantly improving the greenhouse's space utilization efficiency. The hollow cable bidirectional tensioned grid structure of the present invention constitutes the roof structure, and the roof structure forms a greenhouse through supporting components. This structure also serves as the building's load-bearing system and fluid transport system.

[0053] The cavity cable-stayed bidirectional tensioned mesh structure provided by this invention can integrate the functions of building load-bearing and HVAC transmission. It not only meets the mechanical requirements of large greenhouses as large-span spatial structures, but also provides a highly efficient, uniform, energy-saving heating solution that does not occupy indoor space, making it particularly suitable for greenhouses in high-altitude and cold regions.

[0054] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0055] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A cavity cable bidirectional tensioned mesh structure, characterized in that: Includes a hollow cable (2), and an upper chord layer is provided above the hollow cable (2). The upper chord layer includes multiple upper chord beams (1), and the multiple upper chord beams (1) are arranged in a grid pattern. The hollow cable (2) includes multiple longitudinal hollow cables (21) and multiple transverse hollow cables (22). The multiple longitudinal hollow cables (21) and multiple transverse hollow cables (22) are respectively arranged in a one-to-one correspondence with the upper chord beam (1) and spliced ​​in a grid shape to form the lower chord layer. An internal node (42) is provided at each junction of the multiple longitudinal cavity cables (21) and the multiple transverse cavity cables (22). The internal node (42) is connected to the upper chord beam (1) through a vertical strut (3). The two ends of the longitudinal cavity cables (21) and the two ends of the transverse cavity cables (22) are respectively connected to the ends of the upper chord beam (1) through boundary nodes (41).

2. The cavity cable bidirectional tensioned mesh structure according to claim 1, characterized in that: The upper chord beam (1) is arranged in an arc shape, and the height of the middle point of the upper chord beam (1) is higher than the height of the two ends of the upper chord beam (1).

3. The cavity cable bidirectional tensioned mesh structure according to claim 1, characterized in that: The cavity cable (2) has a through-flow fluid channel inside.

4. The cavity cable bidirectional tensioned mesh structure according to claim 1, characterized in that: The internal node (42) includes a first intermediate component, which has a first cavity. A strut interface (423) is fixedly connected to the top surface of the first intermediate component. The strut interface (423) is threadedly connected to the vertical strut (3). An output interface (421) is connected to the end of the first intermediate component away from the strut interface (423).

5. The cavity cable bidirectional tensioned mesh structure according to claim 4, characterized in that: The first intermediate component has multiple internal cable interfaces (422) arranged circumferentially, and the multiple internal cable interfaces (422) are equally spaced on the first intermediate component and connected to the first cavity.

6. The cavity cable bidirectional tensioned mesh structure according to claim 5, characterized in that: Each of the internal cable interfaces (422) is connected to the corresponding longitudinal cavity cable (21) or transverse cavity cable (22) via a first adapter.

7. The cavity cable bidirectional tensioned mesh structure according to claim 1, characterized in that: The boundary node (41) includes a second intermediate component, which has a second cavity. A beam interface (413) is fixedly connected to the side of the second intermediate component facing the upper chord beam (1), and the beam interface (413) is connected to the end of the upper chord beam (1).

8. The cavity cable bidirectional tensioned mesh structure according to claim 7, characterized in that: A boundary cable interface (412) is provided below the beam interface (413). The boundary cable interface (412) is connected to the end of the longitudinal cavity cable (21) or the end of the transverse cavity cable (22) through a second adapter.

9. The cavity cable bidirectional tensioned mesh structure according to claim 8, characterized in that: An input interface (411) is provided below the boundary cable interface (412), and both the input interface (411) and the boundary cable interface (412) are connected to the second cavity.

10. The cavity cable bidirectional tensioned mesh structure according to claim 7, characterized in that: The two adjacent second middlewares are connected through a boundary interface (414).

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