Device for controlling horizontal deformation of large-span arc-shaped net rack and tensioning node structure for tensioning large-span arc-shaped net rack

Abstract

The utility model discloses a device for controlling horizontal deformation of a large-span arc-shaped net rack and a tensioning node structure for tensioning the large-span arc-shaped net rack, and belongs to the field of net rack construction. Comprising a hydraulic lifter, a first fixing end, a second fixing end, a steel strand and an anchorage device, the first fixing end and the second fixing end are arranged at the two arc-shaped ends of an arc-shaped net rack correspondingly, and tensioning node structures of the first fixing end and the second fixing end each comprise a sleeve which penetrates through a net rack ball and is arranged in the tensioning direction; a bracket is fixed to one end, corresponding to the sleeve, of the outer side of the net rack ball, the hydraulic lifter is connected with the bracket of the tensioning node structure of the first fixed end, the anchorage device is arranged at the bracket of the tensioning node structure of the second fixed end, and one end of the steel strand penetrates through the sleeve of the first fixed end and is connected with a center hole jack of the hydraulic lifter. The other end of the steel strand penetrates through the sleeve of the second fixing end and is connected with the anchorage device in an anchoring mode. The deformation of the net rack can be effectively controlled.

Description

Technical Field

[0001] This utility model relates to a device for controlling the horizontal deformation of a large-span curved space frame, belonging to the field of space frame construction technology. This utility model also relates to a tensioning node structure used for controlling the horizontal deformation of a large-span curved space frame. Background Technology

[0002] Many large factories currently utilize space frame structures, which often have large spans. For example, the main structure of a certain factory building employs a regular square pyramid welded spherical space frame structure, with a length of 99 meters, a span of 140 meters, and a height of 116 meters. All structural elements are regular square pyramid welded spherical node space frames. The factory roof has an arched shape, and the facade structure is inclined at an 8-degree angle. During the installation of the space frame structure, it is divided into multiple construction units from top to bottom, and assembled using a segmented outward expansion and lifting method. Due to the heavy weight of the space frame, it is prone to horizontal deformation. Therefore, the horizontal deformation of the space frame needs to be controlled during the assembly process to ensure precise control and positioning of the arc-shaped space frame structure. Currently, there is no device in the technology capable of precisely controlling the horizontal deformation of large-span arc-shaped space frames. Therefore, the inventors of this application propose a construction scheme for arc-shaped space frames that relies on their own anchoring and tensioning. This construction scheme requires the design of new corresponding construction devices. In addition, due to the special nature of the space frame structure, how to set the tensioning nodes during tensioning construction is a difficult problem, especially when the tensioning nodes are at the spheres of the space frame, there is a problem that the tensioning equipment cannot be installed. Utility Model Content

[0003] To address the aforementioned shortcomings in the existing technology, this utility model provides a tensioning node structure for tensioning large-span arc-shaped space frames.

[0004] This utility model is achieved through the following technical solution: a tensioning node structure for tensioning a large-span arc-shaped space frame, comprising a space frame sphere of the arc-shaped space frame, characterized in that: a sleeve arranged along the tensioning direction is provided through the space frame sphere, and a support is fixed on the outer side of the space frame sphere corresponding to one end of the sleeve, and a through hole coaxial with the sleeve is provided on the support.

[0005] Furthermore, both ends of the sleeve extend a certain length beyond the net frame ball.

[0006] This utility model also provides a device for controlling the horizontal deformation of a large-span arc-shaped space frame, which includes a hydraulic lifter, a first fixed end, a second fixed end, steel strands, and anchors. The first fixed end and the second fixed end are respectively set at the two ends of the arc of the arc-shaped space frame. Both the first fixed end and the second fixed end adopt the above-mentioned tensioning node structure. The hydraulic lifter is connected to the support of the tensioning node structure of the first fixed end. The anchor is set at the support of the tensioning node structure of the second fixed end. One end of the steel strand passes through the sleeve of the first fixed end and is connected to the through-hole jack of the hydraulic lifter. The other end of the steel strand passes through the sleeve of the second fixed end and is anchored to the anchor.

[0007] This utility model uses a lifting device and steel strands to pull the horizontal force of the arc-shaped space frame, thereby controlling the deformation of the space frame and enabling precise control of the horizontal deformation of large-span arc-shaped space frames.

[0008] The beneficial effects of this utility model are as follows: By modifying the spheres at the tensioning nodes, this utility model effectively solves the problem of the inability to set tensioning nodes in space frame structures; by using hydraulic lifters and steel strand tensioning, the horizontal force of the arc-shaped space frame can be effectively controlled, thus effectively controlling space frame deformation and ensuring precise positioning of the space frame in planar terms. The tensioning nodes in this utility model can be installed simultaneously with the main body of the space frame and do not need to be removed or replaced after construction, forming part of the permanent structure of the space frame and eliminating the hassle of replacing sphere nodes. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the layout elevation of the present invention in a specific embodiment;

[0010] Figure 2 yes Figure 1 A schematic diagram of the layout of this utility model when the fourth lifting unit is lifted;

[0011] Figure 3 yes Figure 1 An enlarged schematic diagram of part A in the diagram;

[0012] Figure 4 yes Figure 1 An enlarged schematic diagram of part B in the diagram;

[0013] Figure 5 This is a schematic diagram of the tensioning node structure at the tensioning end in this utility model;

[0014] Figure 6 This is a schematic diagram of the tensioning node structure at the anchoring end in this utility model;

[0015] In the diagram, 1 is the steel space frame, 2 is the steel strand, 3 is the hydraulic lifter, 4 is the support, 5 is the space frame ball, 6 is the anchor, 7 is the sleeve, A is the first fixed end, and B is the second fixed end. Detailed Implementation

[0016] The present invention will be further described below through non-limiting embodiments and in conjunction with the accompanying drawings:

[0017] As shown in the attached diagram, the factory building has an arched roof with an 8-degree slope. It employs a square-pyramidal welded spherical space frame structure, with a length of 99 meters, a span of 140 meters, and a height of 116 meters. The construction is divided into multiple units from top to bottom, using a segmented outward expansion and lifting method. This involves using a lifting device to raise each unit to a certain height, then welding the next unit's space frame to its lower part. The space frame is then temporarily supported on the ground, completing the system transition, and the lifting process continues until the space frame installation is complete. During the assembly of the construction units, it is necessary to control the horizontal deformation of the space frame.

[0018] The following device is used to control the horizontal deformation of the arc-shaped space frame: A device for controlling the horizontal deformation of a large-span arc-shaped space frame includes a hydraulic lifter 3, a first fixed end A, a second fixed end B, steel strands 2, and anchors 6. The horizontal force of the arc-shaped space frame is controlled by tensioning. The first fixed end A and the second fixed end B are respectively located at the two ends of the arc of the arc-shaped space frame. The first fixed end A serves as the tensioning end, and the second fixed end B serves as the anchoring end. The first fixed end A and the second fixed end B serve as tensioning nodes, which are set using the space frame sphere 5 of the space frame's own structure. The tensioning node structure adopts the following structure: a sleeve 7 is inserted through the space frame sphere 5 along the tensioning direction. A support 4 is fixed to one end of the sleeve 7 on the outside of the space frame sphere 5. The support 4 has a through hole coaxial with the sleeve, allowing the steel strands to pass through. Preferably, both ends of the sleeve 7 extend a certain length outside the space frame sphere 5. Support 4 includes a support plate and a stiffening plate. Support 4 is welded and fixed to the outer surface of the space frame sphere 5 via the stiffening plate. The thickness of the support plate at the tensioning node is the same as the wall thickness of the space frame sphere 5. The length of support 4 is determined according to the layout, ensuring that it does not affect the installation of the space frame members. The inner diameter of the sleeve 7 is determined according to the specifications of the lifter at the tensioning node. The tensioning node is installed simultaneously with the main body of the space frame.

[0019] The hydraulic lifter 3 is connected to the support 4 of the tensioning node structure at the first fixed end A, and the anchor 6 is set at the support 4 of the tensioning node structure at the second fixed end B. One end of the steel strand 2 passes through the sleeve 7 of the first fixed end A and is connected to the through-hole jack of the hydraulic lifter 3, while the other end of the steel strand 2 passes through the sleeve 7 of the second fixed end B and is anchored to the anchor 6. The hydraulic lifter 3, as a tensioning device, is existing technology and mainly includes a lifting frame and a through-hole jack. After the steel strand 2 is inserted into the jack, it is anchored by the tensioning end anchor. The hydraulic lifter has wedge-shaped anchors at both ends, which have a one-way self-locking function. When the anchor is working (tight), it automatically locks the steel strand; when the anchor is not working (loose), it releases the steel strand, allowing it to move. By using the hydraulic lifter 3 and the steel strand 2 to pull against each other, the horizontal force of the arc-shaped space frame is effectively controlled, thereby controlling the deformation of the space frame.

[0020] In setting up this utility model, the corresponding number is set according to the working condition calculation results of each lifting unit, as shown in the attached figure. Figure 2 As shown, in this embodiment, each lifting unit is equipped with five horizontal tensioning devices during lifting. The tension force and equipment are adjusted according to calculation results. Each hydraulic lifter is controlled by a control device, which can achieve automatic control through sensor monitoring and centralized computer control. This meets the requirements for synchronous tensioning, aerial attitude adjustment, and single-point millimeter-level fine adjustment needed in the overall lifting and installation of the lifting unit, thereby achieving precise control and positioning of the arc-shaped space frame structure in planar position.

[0021] During construction using this invention, the tensioning nodes are installed synchronously with the main body of the space frame. Then, the hydraulic lifter 3, anchorage 6, and steel strand 2 are installed, and the hydraulic pump power system is connected to the oil pipes of the hydraulic lifter. When the lifting unit is lifted, the span of the space frame is adjusted using the hydraulic lifter 3 and steel strand 2 until it meets the design requirements, completing the horizontal tensioning of the lifting unit. Through the hydraulic control system, the pressure of each hydraulic lifter can be precisely controlled, effectively controlling the horizontal force of the arc-shaped space frame and achieving precise control of the planar position of the arc-shaped space frame structure.

[0022] The sleeve in the tensioning node structure of this utility model needs to be sealed after the lifting is completed. The sleeve 7 and the support 4 are both part of the permanent structure of the space frame, which can save the trouble of replacing the ball node.

[0023] This utility model has a simple structure and can effectively control the horizontal force of the arc-shaped space frame, ensuring the precise positioning of the space frame in planar position.

[0024] The other parts in this embodiment are all existing technologies and will not be described in detail here.

Claims

1. A tensioning node structure for tensioning a large-span arc-shaped space frame, comprising a space frame sphere (5) of the arc-shaped space frame, characterized in that: A sleeve (7) arranged along the tensioning direction is provided inside the net frame ball (5). A support (4) is fixed on the outside of the net frame ball (5) corresponding to one end of the sleeve (7). A through hole coaxial with the sleeve (7) is provided on the support (4).

2. The tensioning node structure for tensioning a large-span arc-shaped space frame according to claim 1, characterized in that: Both ends of the sleeve (7) extend a certain length outside the net ball (5).

3. A device for controlling the horizontal deformation of a large-span arc-shaped space frame, characterized in that: The device includes a hydraulic lifter, a first fixed end, a second fixed end, steel strands, and anchors. The first and second fixed ends are respectively located at the two ends of the arc of the arc-shaped space frame. Both the first and second fixed ends adopt the tensioning node structure as described in any one of claims 1-2. The hydraulic lifter is connected to the support of the tensioning node structure of the first fixed end. The anchor is located at the support of the tensioning node structure of the second fixed end. One end of the steel strand passes through the sleeve of the first fixed end and is connected to the through-hole jack of the hydraulic lifter. The other end of the steel strand passes through the sleeve of the second fixed end and is anchored to the anchor.

Images