Large-span multi-layer valve hall structure with detachable cable assembly

Abstract

The application discloses a large-span multilayer valve hall structure with detachable cable assembly and belongs to the technical field of electric power civil engineering, which comprises a floor truss, a roof truss, a sliding rail crane, a cable assembly and a frame column; the floor truss and the roof truss are vertically connected with the frame column at both ends to form a valve hall structure main body; the sliding rail crane is slidingly connected to one side of the floor truss away from the roof truss; the cable assembly comprises a plurality of cables, which are connected between the floor truss and the roof truss when hoisting the valve tower; and the cable assembly is removed after the valve tower hoisting is completed. The floor truss and the roof truss cooperatively bear the temporary construction load in the valve tower hoisting working condition through the cable assembly, and a safe, reliable, economic and reasonable design scheme of the multilayer valve hall structure is realized under the premise of considering the bearing capacity requirements of normal working conditions and valve tower hoisting working conditions.

Description

Technical Field

[0001] This invention belongs to the field of power civil engineering technology, specifically relating to a large-span multi-layer valve hall structure with detachable cable assemblies. Background Technology

[0002] Converter stations are key facilities in high-voltage direct current (HVDC) transmission systems, enabling the conversion between alternating current (AC) and direct current (DC). The valve hall structure is the core building within the converter station, housing important electrical equipment such as valve towers. Previously, converter stations were typically built in suburban areas where land scarcity wasn't an issue, allowing for the valve hall structure to be designed as a large-span, single-story structure. However, in urban areas, due to limited land, more compact converter stations are needed, requiring the valve hall structure to be designed as a large-span, multi-story structure to save space.

[0003] In large-span, multi-story valve hall structures, due to the large size and weight of the valve tower equipment, it is usually placed on the ground floor, while the upper floors are used to house other small, lightweight electrical equipment. Both the initial installation and subsequent maintenance of the valve tower equipment involve hoisting and relocation, requiring the installation of a sliding-rail crane at the bottom of the second-floor structure. Therefore, the second-floor structure, in addition to bearing the load under normal use, also needs to temporarily bear the weight of the valve tower during hoisting, resulting in excessive load on the second floor structure. This is detrimental to both the safety of the valve tower hoisting construction and the economic efficiency of the structural design. Furthermore, roof structures are typically designed to account for snow loads, resulting in a significant load-bearing capacity margin when the roof is snow-free, which is not adequately utilized during the valve tower hoisting process.

[0004] Therefore, how to fully utilize the roof structure's load-bearing capacity margin when there is no snow accumulation, while meeting the normal operating load-bearing capacity requirements of large-span multi-layer valve hall structures and the safety requirements of valve tower hoisting, is a crucial technical issue that urgently needs to be addressed in the construction of compact converter station projects in urban areas. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a large-span multi-layer valve hall structure with detachable cable assemblies. The structure provided by this invention is simple, easy to arrange, and can fully mobilize the load-bearing capacity of the valve hall structure, thereby improving the safety and reliability of valve tower hoisting operations.

[0006] This invention provides the following technical solution: A large-span, multi-story valve hall structure with detachable cable assemblies is provided, including floor trusses, roof trusses, sliding rail cranes, cable assemblies, and frame columns; The two ends of the floor truss and the roof truss are respectively perpendicularly connected to the frame columns to form the main body of the valve hall structure; The sliding rail crane is slidably connected to the side of the floor truss facing away from the roof truss; The cable assembly has multiple cables, which are connected between the floor truss and the roof truss when the valve tower is hoisted.

[0007] Furthermore, the upper chord node of the floor truss is provided with multiple floor truss lifting lugs, and the lower chord node of the roof truss is provided with multiple roof lifting lugs. One end of the cable is connected to the floor truss lifting lug, and the other end is connected to the roof lifting lug.

[0008] Furthermore, the cable assembly also includes multiple turnbuckles, with each cable and turnbuckle corresponding to one another. One end of each cable is connected to one end of each turnbuckle, and the other end is connected to the roof slab lug. The other end of each turnbuckle is connected to the floor slab lug.

[0009] Furthermore, the number of connections between the floor slab lifting lug and the turnbuckle is 1 or 2, and the number of connections between the roof slab lifting lug and the cable is 1 or 2.

[0010] Furthermore, the arrangement of each of the cables includes parallel arrangement, V-shaped arrangement, or X-shaped arrangement.

[0011] Furthermore, when the cables are arranged in parallel, the floor slab lugs correspond one-to-one with the roof slab lugs, the cables, and the turnbuckles; When the cables are arranged in a V-shape or an X-shape, the floor slab lugs and roof slab lugs at the ends are respectively connected to one turnbuckle and one cable, and the floor slab lugs and roof slab lugs in the middle are respectively connected to two turnbuckles and two cables.

[0012] Furthermore, the floor slab hangers are bolted to the floor slab truss, and the roof slab hangers are bolted to the roof truss.

[0013] Furthermore, the turnbuckle is connected to the floor slab lifting lug by bolts.

[0014] Compared with the prior art, the beneficial effects of the present invention are: In this invention, both the roof and floor structures of the large-span, multi-story valve hall structure adopt truss structures, which can effectively improve the load-bearing capacity of the roof and floor structures. By arranging the sliding rail crane at the bottom of the floor steel truss and above the valve tower equipment, the bottom valve tower equipment can be easily hoisted and moved using the internal structure of the valve hall, significantly reducing the construction difficulty of valve tower equipment installation and maintenance. By setting floor lifting lugs and roof lifting lugs at the upper chord nodes of the floor truss and the lower chord nodes of the roof truss respectively, and using detachable cable assemblies composed of steel cables and turnbuckles for connection and tensioning, the roof steel truss and the floor steel truss form a temporary collaborative working system under valve tower hoisting conditions, jointly bearing the self-weight of the valve tower under valve tower hoisting conditions. This avoids the disadvantages of the floor truss bearing the self-weight of the valve tower alone, resulting in excessive stress and the roof truss's load-bearing capacity margin not being fully utilized, thus improving the safety of hoisting construction and the economy of the structural design scheme. After the valve tower is hoisted, the valve hall structure can be quickly restored to normal use by removing the roof lifting lugs, floor lifting lugs, and cable assemblies. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the large-span multi-layer valve hall structure of the present invention under normal operating conditions; Figure 2 This is a schematic diagram of the parallel arrangement of cables under the hoisting conditions of the large-span multi-layer valve hall structure of the present invention; Figure 3 This is a schematic diagram of the V-shaped cable arrangement under the hoisting conditions of the large-span multi-layer valve hall structure of the present invention; Figure 4 This is a schematic diagram of the X-shaped cable arrangement under the hoisting conditions of the large-span multi-layer valve hall structure of the present invention; Figure 5 This is a schematic diagram of the connection between the floor slab lifting lug and a single turnbuckle of the present invention; Figure 6 This is a schematic diagram showing the connection between the floor slab lifting lugs and the double turnbuckles of the present invention.

[0016] The following are marked in the diagram: 1. Floor truss; 2. Roof truss; 3. Slide rail crane; 4. Floor lifting lug; 5. Roof lifting lug; 6. Cable assembly; 61. Cable; 62. Turnbuckle; 7. High-strength bolt; 8. Frame column; 9. Reactor; 10. Valve tower. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0018] It should be noted that in the description of this invention, the terms "front," "rear," "left," "right," "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. In the description of this invention, unless otherwise stated, "a plurality of" or "multiple roots" means two or more.

[0019] The terms “include,” “including,” “have,” “contain,” etc., used in this article are all open-ended terms, meaning that they include but are not limited to.

[0020] The present invention provides a large-span multi-story valve hall structure with detachable cable assemblies, including floor trusses 1, roof trusses 2, sliding rail cranes 3, cable assemblies 6, and frame columns 8.

[0021] like Figure 1 As shown, the floor truss 1 and roof truss 2 are vertically connected to the frame columns 8 at both ends to form the main structure of the large-span multi-story valve hall. Floor truss 1 and roof truss 2 are arranged horizontally. Roof truss 2 is fixed to the top of frame columns 8, serving as the roof load-bearing system of the large-span multi-story valve hall structure, responsible for bearing dead, live, and snow loads. Floor truss 1 is located below roof truss 2, serving as the floor load-bearing system of the large-span multi-story valve hall structure, responsible for bearing dead and live loads. Frame columns 8 are vertically fixed to the foundation, transferring the loads borne by roof truss 2 and floor truss 1 to the foundation. In one embodiment, floor truss 1 and roof truss 2 are fixed to frame columns 8 by welding, and roof truss 2, floor truss 1, and frame columns 8 together constitute the main load-bearing structure of the large-span multi-story valve hall. Floor truss 1, roof truss 2, and frame columns 8 are all made of steel. In one embodiment, the upper chord of the roof truss 2 is a double-sloped broken line, and the lower chord is a horizontal straight line to meet the roof drainage requirements; the upper and lower chords of the floor truss 1 are both horizontal straight lines to meet the floor usage requirements.

[0022] like Figure 1 As shown, the area formed between the floor truss 1, the roof truss 2, and the frame column 8 constitutes a storage area for small equipment. Relatively small electrical equipment, such as reactors 9, is placed on the floor truss 1. Larger electrical equipment, such as valve towers 10, is located below the floor truss 1 on the ground floor.

[0023] like Figure 1As shown, the sliding rail crane 3 is slidably connected to the side of the floor truss 1 facing away from the roof truss 2, that is, above the lower chord of the floor truss 1 and the valve tower 10. The sliding rail crane 3 is arranged in a direction perpendicular to the floor truss 1 and slides horizontally. The sliding rail crane 3 is equipped with a hook for hoisting and moving equipment such as the valve tower 10, thus adapting to engineering conditions where the indoor space of a large-span, multi-story valve hall structure is limited and large external transportation and hoisting machinery cannot enter the indoor construction. After the initial installation of the valve tower 10, the sliding rail crane 3 can also continue to be used as a hoisting tool for the later inspection, maintenance, replacement, and secondary relocation of the valve tower 10.

[0024] like Figures 2-4 As shown, the upper chord nodes of the floor truss 1 are provided with multiple floor lifting lugs 4, and the lower chord nodes of the roof truss 2 are provided with multiple roof lifting lugs 5. In one embodiment, the floor lifting lugs 4 are connected to the floor truss 1 by high-strength bolts 7, and the roof lifting lugs 5 are connected to the roof truss 2 by high-strength bolts 7. In some possible embodiments, the floor lifting lugs 4 and roof lifting lugs 5 can also be replaced with lifting rings, clips, or clamps, etc. When the valve tower 10 is installed or under normal operating conditions, the floor lifting lugs 4 and roof lifting lugs 5 can be removed from the floor truss 1 and the roof truss 2.

[0025] like Figures 2-4 As shown, a cable assembly 6 is provided between the floor truss 1 and the roof truss 2. When the valve tower 10 is hoisted, the cable assembly 6 connects the floor truss 1 and the roof truss 2, forming a collaborative working system to transfer the temporary construction load generated by the hoisting of the valve tower 10 from the floor truss 1 to the roof truss 2 via the cable assembly 6. When the hoisting of the valve tower 10 is completed or under normal operating conditions, the cable assembly 6 can be detached from the floor truss 1 and the roof truss 2. The cable assembly 6 includes multiple cables 61 and multiple turnbuckles 62, with each cable 61 corresponding to one turnbuckle 62. One end of each cable 61 is connected to a roof lifting lug 5, and the other end is connected to a floor lifting lug 4 via a turnbuckle 62. In one possible embodiment, one side of the turnbuckle 62 is connected to the cable 61 via a tie rod, and the other end is connected to the floor lifting lug 4 via a bolt. In one possible embodiment, the cable 61 is made of steel. In addition to being used for connection, turnbuckle 62 can also be used to adjust the effective length and tension of cable 61 to meet the requirements of use under different conditions. For example, by tightening turnbuckle 62, cable 61 can be tensioned.

[0026] like Figures 2-4 As shown, the arrangement of each cable 61 between the floor truss 1 and the roof truss 2 includes parallel, V-shaped, or X-shaped arrangements. Different arrangements can be rationally selected based on the truss section length, valve tower equipment weight, sliding rail crane location, and construction organization conditions. For example... Figure 2 and Figure 5As shown, when each cable 61 is arranged in parallel, each upper chord node of the floor truss 1 corresponds one-to-one with each lower chord node of the roof truss 2, and each floor truss lug 4 corresponds one-to-one with each roof truss lug 5, corresponding to a single cable 61 and a single turnbuckle 62 respectively. Each cable 61 is installed between the upper chord of the floor truss 1 and the lower chord of the roof truss 2 and arranged in parallel. Figure 3 and Figure 6 As shown, when each cable 61 is arranged in a V-shape, each upper chord node of the floor truss 1 corresponds one-to-one with each lower chord node of the roof truss 2. Floor truss lugs 4 are spaced apart on the upper chord nodes of the floor truss 1, and roof truss lugs 5 are spaced apart on the lower chord nodes of the roof truss 2. Roof truss lugs 5 are located on the corresponding lower chord nodes where no floor truss lugs 4 are present. The floor truss lugs 4 and roof truss lugs 5 at both ends are connected to a single turnbuckle 62 and a single cable 61, respectively. The floor truss lugs 4 and roof truss lugs 5 in the middle are connected to double turnbuckles 62 and double cables 61. Figure 4 and Figure 6 As shown, when each cable 61 is arranged in an X-shape, each upper chord node of the floor truss 1 corresponds one-to-one with each lower chord node of the roof truss 2, and each floor truss lug 4 corresponds one-to-one with each roof truss lug 5. The floor truss lug 4 and roof truss lug 5 located at both ends are connected to a single turnbuckle 62 and a single cable 61, respectively, while the floor truss lug 4 and roof truss lug 5 located in the middle are connected to double turnbuckles 62 and double cables 61.

[0027] Under normal operating conditions, valve towers 10 are placed on the ground floor, the sliding rail crane 3 is unloaded, and the roof lifting lugs 5, floor lifting lugs 4, and cable assemblies 6 are not installed in the structure. The roof truss 2 and floor truss 1 each bear their own load and do not form a common working system. Under the lifting condition of valve towers 10, valve towers 10 are suspended in the air, the sliding rail crane 3 is under load, and the roof lifting lugs 5, floor lifting lugs 4, and cable assemblies 6 are installed in the structure. The roof truss 2 and floor truss 1 form a collaborative working system through the cable assemblies 6, jointly bearing the self-weight of valve towers 10 under lifting conditions.

[0028] This invention provides a process for hoisting a valve tower 10 and the working process of a collaborative working system between the floor truss 1 and the roof truss 2. Before hoisting the valve tower 10, the roof lifting lugs 5, floor lifting lugs 4, and cable assemblies 6 are installed, and the turnbuckles 62 are tightened. During the hoisting of the valve tower 10, the self-weight of the valve tower 10 is first transferred to the corresponding node area of ​​the floor truss 1 by the sliding rail crane 3, and then transferred to the roof truss 2 through the floor lifting lugs 4, cable assemblies 6, and roof lifting lugs 5, so that the self-weight load of the valve tower is jointly borne by the floor and roof trusses during the hoisting construction stage. After the valve tower 10 is hoisted, first loosen the turnbuckle 62 and release the preload of the cable 61. Then, remove the high-strength bolts 7 connecting the roof lifting lug 5 to the lower chord of the roof truss 2 and the high-strength bolts 7 connecting the floor lifting lug 4 to the upper chord of the floor truss 1. This completes the disassembly of the roof lifting lug 5, the floor lifting lug 4, and the cable assembly 6, allowing the large-span, multi-story valve hall structure to quickly return to normal operating conditions. In one embodiment, the valve tower 10 is hoisted when there is no snow on the roof. The roof truss 2 has a large bearing capacity margin when there is no snow on the roof, which can be used to bear the temporary construction load transferred to the roof truss 2 during the hoisting of the valve tower 10.

[0029] During the hoisting process, this invention establishes a collaborative working system between the floor and roof by setting up a detachable cable assembly 6. This makes reasonable use of the load-bearing capacity margin of the roof truss 2 to alleviate the damage to the floor truss 1 caused by the load generated during the hoisting of the valve tower 10. This improves the safety and stability of the valve hall structure, effectively reduces the amount of steel used in the roof truss 2 and the floor truss 1, lowers construction costs, and improves economic applicability.

[0030] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A large-span, multi-layer valve hall structure with detachable cable assemblies, characterized in that, It includes floor trusses (1), roof trusses (2), sliding rail cranes (3), cable assemblies (6) and frame columns (8); The two ends of the floor truss (1) and the roof truss (2) are respectively vertically connected to the frame column (8) to form the main body of the valve hall structure; The sliding rail crane (3) is slidably connected to the side of the floor truss (1) facing away from the roof truss (2); The cable assembly (6) includes multiple cables (61) that are connected between the floor truss (1) and the roof truss (2) when the valve tower (10) is hoisted.

2. The large-span multi-layer valve hall structure with detachable cable assemblies according to claim 1, characterized in that, The floor truss (1) has multiple floor lugs (4) at the upper chord node, and the roof truss (2) has multiple roof lugs (5) at the lower chord node. One end of the cable (61) is connected to the floor lug (4), and the other end is connected to the roof lug (5).

3. The large-span multi-layer valve hall structure with detachable cable assemblies according to claim 2, characterized in that, The cable assembly also includes multiple turnbuckles (62), with the cable (61) and the turnbuckle (62) corresponding one-to-one. One end of the cable (61) is connected to one end of the turnbuckle (62), and the other end is connected to the roof slab lug (5). The other end of the turnbuckle (62) is connected to the floor slab lug (4).

4. The large-span multi-layer valve hall structure with detachable cable assemblies according to claim 3, characterized in that, The number of connections between the floor slab lug (4) and the turnbuckle (62) is 1 or 2, and the number of connections between the roof slab lug (5) and the cable (61) is 1 or 2.

5. The large-span multi-layer valve hall structure with detachable cable assemblies according to claim 1, characterized in that, The arrangement of each of the cables (61) includes parallel arrangement, V-shaped arrangement or X-shaped arrangement.

6. The large-span multi-layer valve hall structure with detachable cable assemblies according to claim 1, characterized in that, When the cables (61) are arranged in parallel, the floor slab lugs (4) correspond one-to-one with the roof slab lugs (5), the cables (61) and the turnbuckles (62); When the arrangement of the cables (61) is V-shaped or X-shaped, the floor slab lugs (4) and roof slab lugs (5) at the ends are respectively connected to one turnbuckle (62) and one cable (61), and the floor slab lugs (4) and roof slab lugs (5) in the middle are respectively connected to two turnbuckles (62) and two cables (61).

7. The large-span multi-layer valve hall structure with detachable cable assemblies according to claim 2, characterized in that, The floor slab lug (4) is bolted to the floor slab truss (1), and the roof slab lug (5) is bolted to the roof truss (2).

8. The large-span multi-layer valve hall structure with detachable cable assemblies according to claim 3, characterized in that, The turnbuckle (62) is connected to the floor slab lifting lug (4) by bolts.

Images