CN114934623B - Cable dome cable space multi-directional intersection node for space cable structure - Google Patents

Abstract

The invention discloses a cable dome inhaul cable space multidirectional intersection node for a space cable structure, which comprises an upper cover plate, a lower cover plate, a middle partition plate, a central steel pipe and an inhaul cable lug plate, wherein the upper cover plate, the lower cover plate and the middle partition plate are horizontally arranged and respectively connected and fixed at the upper end, the lower end and the middle position of the central steel pipe, and the middle partition plate divides the node into an upper half area and a lower half area; the cable pulling lug plate at least comprises a first cable pulling lug plate and a second cable pulling lug plate, the first cable pulling lug plate is vertically arranged in the upper half area, the second cable pulling lug plate is vertically arranged in the lower half area, and the extension line of the cable axis connected with the first cable pulling lug plate and the second cable pulling lug plate is converged at the center of the node. The node provided by the invention is simple to manufacture, reasonable in stress, high in strength and low in material consumption, and particularly, the number and arrangement of the inhaul cables are flexible under the condition that the connecting space is multidirectional and a plurality of inhaul cables are needed, so that the node is suitable for various structural forms such as large-span space buildings, bridges and the like, is wide in application and is worthy of popularization.

Description

Cable dome cable space multi-directional intersection node for space cable structure

Technical field

The present invention relates to the technical field of building structures, and specifically to a cable dome cable space multi-directional intersection node used in a space cable structure.

Background technique

Currently, with the continuous advancement of building materials and construction technology, long-span space cable structures are widely used to meet the needs of large-span buildings such as stadiums and exhibition halls, and to form large indoor column-free spaces to the greatest extent possible.

Cable dome structure nodes are usually involved in large-span space cable structures. Their main function is to connect cables in different directions. However, when there are many intersecting cables, the node structure is more complicated. Cast steel nodes are usually used in traditional structural design. The cost of cast steel nodes is significantly higher than that of steel plate splicing nodes due to the need to make molds and more complex processing techniques. Especially when the cable dome structure is not centrally symmetrical, the angles between the cables at each position are also different, so that each node needs to be made separately. This will further increase the cost of the node and prolong the production cycle.

In the existing cable nodes, the cables are usually arranged in the same plane. Such nodes can only realize the plane intersection of the cables, but cannot realize the multi-angle intersection of the cables in space. In addition, in existing cable nodes, different cables in the same plane are usually connected to the entire cable ear plate, and cables with different cable strengths use ear plates of the same thickness, resulting in a waste of material.

Contents of the invention

In order to solve the above problems, the present invention proposes a cable dome cable space multi-directional intersection node for a space cable structure. The node has high strength, simple structure, reasonable force bearing, clear force transmission mechanism, can save materials, and is easy to manufacture and process. , easy to assemble on site.

The present invention is implemented as follows:

A cable dome cable space multi-directional intersection node for a space cable structure, including an upper cover plate, a lower cover plate, a middle partition plate, a central steel pipe and a cable ear plate, wherein: the upper cover plate, the lower cover plate It is placed horizontally with the middle partition plate and is connected and fixed at the upper end, lower end and middle position of the central steel pipe respectively. The middle partition divides the node into an upper half and a lower half; the cable lug plate at least includes a first tensioning plate. The first cable lug plate and the second cable lug plate are arranged vertically in the upper half area, the second cable lug plate is vertically arranged in the lower half area, and the first cable lug plate and the second cable lug plate are arranged vertically in the upper half area. The extension lines of the cable axes connected by the ear plates meet at the center of the node.

In some embodiments, the upper cover plate, lower cover plate, and middle partition plate are all circular steel plates, and the side elevation projection is in the shape of a king.

In some embodiments, the upper and lower edges of the first cable ear plate are welded and fixed to the upper cover plate and the middle partition plate, the vertical edge is welded and fixed to the central steel pipe, and the upper and lower edges of the second cable lug plate are welded and fixed to the middle partition plate and the lower The cover plate is welded and fixed, and the vertical edge is connected and fixed to the central steel pipe.

In some embodiments, the first cable lug is configured to connect an obliquely upward cable, that is, the axis of the cable points in an obliquely upward direction, and the axis of the cable is sandwiched between the axis of the central steel pipe in a vertically downward direction. The angle is an obtuse angle, and the second cable ear plate is configured to connect the obliquely downward cable, that is, the axis of the cable points in the obliquely downward direction, and the angle between the axis of the cable and the axis of the central steel pipe in the vertical downward direction is acute angle.

In some embodiments, one or more first cable lug plates and/or second cable lug plates are provided, and the position and angle are determined according to the axial direction of the connected cable.

In some embodiments, the central steel pipe includes a first pipe section in the upper half and a second pipe section in the lower half. The upper and lower ends of the first pipe section are welded and fixed to the center of the upper cover plate and the middle partition plate respectively. The second pipe section The upper and lower ends are welded and fixed to the center of the middle partition plate and the lower cover plate respectively.

In some embodiments, a third cable lug plate is further included, which is disposed in the upper or lower half region, and the first cable lug plate and the second cable lug plate are used to connect the cable dome notochord, The third cable ear plate is used to connect the cable dome diagonal cables.

In some embodiments, it also includes a stiffening rib plate, which is arranged in the upper half area at a position corresponding to at least one of the second cable lug plates, and its upper and lower edges are welded and fixed to the upper cover plate and the middle partition plate, The vertical edges are welded and fixed to the central steel pipe;

And/or, the stiffening rib plate is arranged in the lower half at a position corresponding to at least one of the first cable lug plates, its upper and lower edges are welded and fixed to the middle partition plate and the lower cover plate, and its vertical edges are welded and fixed to the central steel pipe.

In some embodiments, a strut ear plate is also included, which is vertically connected and fixed to the bottom of the lower cover plate for connecting the struts.

In some embodiments, the upper cover plate, lower cover plate, middle partition plate, and cable lug plate are cut from steel plates, and the central circular tube is a seamless steel tube.

Compared with the existing technology, the cable dome cable space multi-directional intersection node used in the space cable structure provided by the present invention has the following advantages:

(1) The present invention only needs to weld steel plates and steel pipes without making molds.

(2) The cable angles of nodes at different locations may be different. When the cable angle changes, you only need to adjust the position and angle of the cable ear plates. There is no need to redesign and manufacture the entire node, including the upper and lower cover plates, middle partition plates and central steel pipe. Same specifications are available.

(3) In traditional cast steel nodes, the cables (ridge cables and oblique cables) in a unified vertical plane are connected to the same ear plate. However, when the difference in cable force between the two cables is large, it will cause waste in the position where the cable force is smaller. , the present invention partitions the nodes by setting intermediate partitions, so that the cables in the same plane can also be designed with cable ear plates respectively, reducing the amount of material.

(4) When the axis of the notochord and the oblique cable are not in the same vertical plane or the numbers are inconsistent, it can be easily realized through the design of the upper and lower separation of this node.

(5) When the present invention is used for nodes on struts, there is a larger plane at the top of the node to facilitate connection with the roof substructure.

(6) The number of cables connected to the nodes of the present invention is flexible and can be applied to a variety of structural forms.

Description of the drawings

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only exemplary. For those of ordinary skill in the art, other implementation drawings can be obtained based on the extension of the provided drawings without exerting creative efforts.

The structures, proportions, sizes, etc. shown in this specification are only used to coordinate with the contents disclosed in the specification for the understanding and reading of people familiar with this technology. They are not used to limit the conditions under which the invention can be implemented, and therefore do not have any technical Any structural modification, change in proportion or size adjustment shall still fall within the scope of the technical content disclosed in the present invention as long as it does not affect the efficacy and purpose achieved by the present invention. In the range.

Figure 1 is a side view of an intersection node according to an embodiment of the present invention;

Figure 2 is a top view of an intersection node according to an embodiment of the present invention;

Figure 3 is a perspective view of an intersection node according to an embodiment of the present invention;

Figure 4 is a side view of a junction node according to another embodiment of the present invention;

Figure 5 is a perspective view of an intersection node according to another embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the present invention will be further described in detail below with reference to the embodiments and drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not used to limit the present invention.

In the description of the present invention, it is to be understood that the terms "comprising/comprising", "consisting of" or any other variation thereof are intended to cover a non-exclusive inclusion such that a product, device, A process or method includes not only those elements but, if necessary, other elements not expressly listed or that are inherent to the product, equipment, process or method. Without further limitation, elements defined by the statements "includes/comprises..." or "consists of" do not exclude the presence of additional elements in a product, device, process or method that includes the stated elements. Same elements.

In the present invention, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

It should also be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" etc. indicate orientation or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device, component or structure referred to must have a specific orientation, be constructed in a specific orientation, or operations should not be construed as limitations of the present invention.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more than two, unless otherwise explicitly and specifically limited.

The implementation of the present invention is described in detail below with reference to preferred embodiments.

Referring to Figure 1, a preferred embodiment of the present invention discloses a cable dome cable space multi-directional intersection node 100 for a space cable structure, including an upper cover plate 1, a lower cover plate 2, a middle partition plate 3, and a central steel pipe 4 and cable lug plates. The specific structure of each component, its position and connection relationship will be described in detail below with reference to specific diagrams.

In some embodiments, as shown in Figure 1, the upper cover plate 1, the lower cover plate 2 and the middle partition plate 3 are placed horizontally and are respectively connected and fixed at the upper end, lower end and middle position of the central steel pipe 4. The middle partition plate 3 divides the nodes. It is the upper half area and the lower half area. The upper half area and the lower half area carry different functions respectively, which will be explained in detail later. It should be understood that the middle partition plate 3 is connected and fixed at the middle position of the central steel pipe 4 and should not be limited to the center of the central steel pipe 4. It can be a suitable position between the upper cover plate 1 and the lower cover plate 2, depending on the requirements. Force calculations determined that the center position was preferred for the present invention.

The upper cover plate 1, the lower cover plate 2, the middle partition plate 3 and the central steel pipe 4 form a king-shaped structure on the side. The overall shape of the nodes is beautiful, the structure is simple, easy to process and manufacture, and easy to install on site. Considering the connection strength of the entire node, the upper cover plate 1, the lower cover plate 2, and the middle partition plate 3 are made of steel plates, preferably circular steel plates, as shown in Figure 2.

In some embodiments, referring to Figures 1 and 2, the cable lug plate at least includes a first cable lug plate 5 and a second cable lug plate 6, and the first cable lug plate 5 is arranged vertically in the upper half, The second cable lug plate 6 is arranged vertically in the lower half, and the extension line of the cable axis connecting the first cable lug plate 5 and the second cable lug plate 6 intersects at the center O of the node. According to the design direction of the cable, match the cable ear plate with the corresponding position and angle so that the forces in each direction of the cable at the node converge at the center of the node, maintaining a balanced force and making the force on the node more reasonable. .

In some embodiments, see Figures 2 and 3, the upper and lower edges of the first cable lug 5 are welded and fixed to the upper cover plate 1 and the middle partition plate 3, and the vertical edges are welded and fixed to the central steel pipe 4, and the second cable lug 5 is welded and fixed to the upper cover plate 1 and the middle partition plate 3. The upper and lower edges of the plate 6 are welded and fixed to the middle partition plate 3 and the lower cover plate 2, and the vertical edges are connected and fixed to the central steel pipe 4. By welding and fixing the cable lug plates with the upper and lower cover plates, the middle partition plate and the central steel pipe on three sides, the cable tension is transmitted jointly by the middle partition plate and the central steel pipe, and the middle partition plate plays the main force-bearing role when the cable is set diagonally. , the node stress is more reasonable.

In some embodiments, referring again to FIG. 1 , the first cable lug 5 is configured to connect an obliquely upward cable, that is, the axis of the cable points in an obliquely upward direction, vertically downward with the axis of the central steel pipe 4 . The angle between the directions is an obtuse angle, such as the angle α in the figure. The second cable ear plate 6 is configured to connect the obliquely downward cable, that is, the axis of the cable points in the obliquely downward direction, with the axis of the central steel pipe 4 The angle in the vertical downward direction is an acute angle, such as the angle β in the figure. The cable lugs in the upper half are connected to the cables diagonally upward, and the cable lugs in the lower half are connected to the cables diagonally downward. The node cable layout is more reasonable and ensures that the extension lines of the cable axes meet. at the center O of the node.

In some embodiments, one or more first cable ear plates 5 may be provided, and the position and angle are determined according to the axis direction of the connected cable. Similarly, one or more second cable ear plates 6 can be provided, and the position and angle are determined according to the axial direction of the connected cable. As shown in Figure 3, two first cable lug plates 5 and two second cable lug plates 6 are provided. This is particularly important when there are many converging cables, because the main function of the cable dome structure nodes is to connect different cables. When there are many intersecting cables, the node structure is more complex. Cast steel nodes are usually used in traditional structural design. The cost of cast steel nodes is significantly higher than that of steel plate splicing nodes due to the need to make molds and more complex processing techniques. Especially when the cable dome structure is not centrally symmetrical, the angles between the cables at each position are also different, resulting in the need to make a separate mold for each node, which will further increase the cost of the node and prolong the production cycle. By arranging multiple cable lug plates in two different upper and lower areas, the present invention meets the requirements for intersection and connection of multi-directional cables in different directions, different angles and different uses.

In some embodiments, the central steel pipe 4 is not a whole steel pipe, but adopts a segmented structure, including a first pipe section 4-1 and a second pipe section 4-2. The first pipe section 4-1 is located in the upper half, and the second pipe section 4-1 is located in the upper half. Pipe section 4-2 is located in the lower half. The upper and lower ends of the first pipe section 4-1 are welded and fixed to the center of the upper cover plate 1 and the middle partition plate 3 respectively. The upper and lower ends of the second pipe section 4-2 are respectively welded and fixed to the center of the middle partition plate 3 and the middle partition plate 3. The center of the lower cover plate 2 is welded and fixed. By adopting a segmented steel pipe structure, it is convenient to weld the end of the steel pipe to the upper and lower cover plates and the middle partition plate, and avoid opening a hole in the center of the middle partition plate 3 to increase the processing complexity of the partition plate, and the perforation of the steel pipe is more direct than that of segmentation Welding is more complicated.

In some embodiments, the present invention can also provide a third cable lug plate 7 as needed. The third cable lug plate 7 is arranged in the upper half or the lower half area. When the third cable lug plate 7 is provided, the third cable lug plate 7 The first cable lug 5 and the second cable lug 6 are used to connect the cable dome ridges, and the third cable lug 7 is used to connect the cable dome oblique cables. Since the force of the notochord is usually much greater than the force of the oblique cable, the thickness of the steel plates required for the first cable lug 5 and the second cable lug 6 will also be much greater than that of the third cable lug 7. If the third cable lug is Using the same steel plate as the first cable lug plate 5 and the second cable lug plate 6 will cause a large waste of material at the third cable lug plate 7. The present invention can divide the upper and lower parts of the third cable lug plate 7 by setting the middle partition plate 3. A third cable lug plate 7 for connecting the diagonal cable is provided separately in the upper or lower half area. It no longer shares the same ear plate with the notochord. In this case, the third cable lug plate 7 can be made of a steel plate with a smaller thickness. , save materials. It should be noted that the position and thickness of the third cable lug plate 7 are determined according to the force calculation. When arranged in the upper half, the third cable lug plate and at least one of the second cable lug plates may or may not be on the same vertical axis. In a straight plane, the thickness of the third cable lug plate and the second cable lug plate can be the same or different; similarly, when disposed in the lower half, the third cable lug plate and at least one of the first cable lug plates In or out of the same vertical plane, the two thicknesses are the same or different. The above-mentioned third cable lug plate 7 can be made of a steel plate with a smaller thickness. It should be understood that each cable lug plate is set independently in a partition and can be cut separately. Normally, the thickness of the third cable lug plate 7 is smaller to save money. material does not mean that the thickness of the third cable lug plate 7 must be smaller than the first cable lug plate 5 and the second cable lug plate 6 connecting the notochord. In particular, when the third cable lug plate and a first cable lug plate or a second cable lug plate can be in the same vertical plane, with the separation of the middle partition 3, the upper and lower cable lug plates are no longer used. The whole plate structure is designed independently in partitions and cut separately. Each thickness is determined according to the respective stress calculation, which not only meets the stress requirements but does not affect each other.

In some embodiments, referring to Figures 4 and 5, the present invention further provides a stiffening rib plate 8. The stiffening rib plate 8 is arranged in the upper half area at a position corresponding to at least one of the second cable lug plates 6, and its upper and lower edges are in line with The upper cover plate 1 and the middle partition plate 3 are welded and fixed, and the vertical edge and the central steel pipe 4 are welded and fixed. Of course, the stiffening rib 8 can also be arranged in the lower half at a position corresponding to at least one of the first cable lug plates 5. Its upper and lower edges are welded and fixed to the middle partition plate 3 and the lower cover plate 2, and the vertical edge is welded to the central steel pipe 4. Welded and fixed. By adding a stiffening rib plate at the location of the first cable lug plate 5 or the second cable lug plate 6, and connecting it with the corresponding first cable lug plate 5 or second cable lug plate in the vertical plane. 6 are coplanar, which improves the overall strength of the middle partition 3 and enhances the strength and stability of the node.

It is easy to understand that when the third cable lug plate 7 and the stiffening rib plate 8 are provided at the same time, the stiffening rib plate 8 should avoid the position of the third cable lug plate 7 and be disposed in the upper or lower half area. There are 7 third cable lug plates.

In some embodiments, the node of the present invention also includes a strut ear plate 9, which is vertically connected and fixed at the bottom of the lower cover 2 for connecting the struts. The shape of the strut ear plate is determined according to the axis direction of the connected strut. .

The upper cover plate 1, the lower cover plate 2, the middle partition plate 3, the cable ear plates and the strut ear plates 9 of the present invention are cut from steel plates, and the central circular tube 4 is a seamless steel tube. The dimensions of the upper and lower cover plates and the middle partition plate are determined by force calculation. It should be ensured that the weld length between the cable ear plate and the middle cover plate is greater than the required weld length calculated based on the cable force.

From the above description, it is easy to foresee that the node structure proposed by the present invention is simple to make, has reasonable stress, high strength, and uses less material. Especially for situations where multi-directional and multiple cables need to be connected in the space, the number of cables is flexible and the layout is flexible. It is flexible and suitable for various structural forms such as large-span space buildings and bridges. It is widely used and deserves to be promoted.

Those skilled in the art can easily understand that, provided there is no conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (9)

1. A cable dome cable space multidirectional intersection node for space cable structure, its characterized in that includes upper cover plate, lower apron, intermediate baffle, central steel pipe and cable otic placode, wherein:

the upper cover plate, the lower cover plate and the middle partition plate are horizontally arranged and respectively connected and fixed at the upper end, the lower end and the middle position of the central steel pipe, and the middle partition plate divides the node into an upper half area and a lower half area;

the cable lug plate at least comprises a first cable lug plate and a second cable lug plate, wherein the first cable lug plate is vertically arranged in the upper half area, the second cable lug plate is vertically arranged in the lower half area, and the extension line of the cable axis connected with the first cable lug plate and the second cable lug plate is converged at the center of the node; and is also provided with

The first cable lug plate is configured to be connected with an obliquely upward cable, namely the cable axis points to an obliquely upward direction, an included angle between the cable axis and the vertically downward direction of the axis of the central steel pipe is an obtuse angle, and the second cable lug plate is configured to be connected with an obliquely downward cable, namely the cable axis points to an obliquely downward direction, and an included angle between the cable axis and the vertically downward direction of the axis of the central steel pipe is an acute angle;

one or more first cable lug plates and/or one or more second cable lug plates are arranged, and the positions and the angles are determined according to the axis direction of the connected inhaul cable.

2. The cable dome cable spatial multi-directional junction according to claim 1, wherein:

the upper cover plate, the lower cover plate and the middle partition plate are all round steel plates, and the projection of the side elevation is in a shape of Chinese character Wang.

3. The cable dome cable spatial multi-directional junction according to claim 1, wherein:

the upper edge and the lower edge of the first cable lug plate are welded and fixed with the upper cover plate and the middle partition plate, the vertical edge is welded and fixed with the central steel pipe, the upper edge and the lower edge of the second cable lug plate are welded and fixed with the middle partition plate and the lower cover plate, and the vertical edge is connected and fixed with the central steel pipe.

4. The cable dome cable spatial multi-directional junction according to claim 1, wherein:

the center steel pipe comprises a first pipe section in the upper half area and a second pipe section in the lower half area, the upper end and the lower end of the first pipe section are respectively welded and fixed at the centers of the upper cover plate and the middle partition plate, and the upper end and the lower end of the second pipe section are respectively welded and fixed at the centers of the middle partition plate and the lower cover plate.

5. The cable dome cable spatial multi-directional junction according to claim 1, wherein:

the cable-stayed bridge further comprises a third cable-stayed lug plate which is arranged in the upper half area or the lower half area, the first cable-stayed lug plate and the second cable-stayed lug plate are used for connecting cable dome chordae, and the third cable-stayed lug plate is used for connecting cable dome oblique cables.

6. The cable dome cable spatial multi-directional junction according to claim 1, wherein:

the cable-pulling lug plate is characterized by further comprising a stiffening rib plate, wherein the stiffening rib plate is arranged at the position corresponding to at least one second cable-pulling lug plate in the upper half area, the upper edge and the lower edge of the stiffening rib plate are welded and fixed with the upper cover plate and the middle partition plate, and the vertical edge of the stiffening rib plate is welded and fixed with the central steel pipe.

7. The cable dome cable spatial multi-directional junction according to claim 6, wherein:

the stiffening rib plate is arranged at the position of the lower half area corresponding to at least one first guy cable lug plate, the upper edge and the lower edge of the stiffening rib plate are welded and fixed with the middle partition plate and the lower cover plate, and the vertical edge is welded and fixed with the central steel pipe.

8. The cable dome cable spatial multi-directional junction according to claim 1, wherein:

the lower cover plate is vertically connected and fixed at the bottom of the lower cover plate and is used for connecting the stay bars.

9. The cable dome cable spatial multi-directional junction according to any one of claims 1 to 8, wherein:

the upper cover plate, the lower cover plate, the middle partition plate and the inhaul cable lug plates are formed by cutting steel plates, and the central steel pipe is a seamless steel pipe.