Installation method of plug-in plate connection structure of hub-type node grid and pipe truss

Abstract

The present invention discloses a method for installing a plug-in plate connection structure of a hub-type node grid and a tube truss, comprising: a connection plate, at least two of which are butt-jointed on the outside of the chord of the tube truss and clamped and fixed to the chord; a plug-in plate, at least two of which are fixed to the connection plate at one end along a direction intersecting the axial direction of the tube truss and have a connection portion that cooperates with the hub node mortise and tenon of the grid at the other end. By adopting the above-mentioned plug-in plate connection structure, the rod body of the hub-type node grid can be reliably connected to the chord of the tube truss longitudinally through the plug-in plate and the connection plate, so as to realize the connection requirement of the hub-type node grid and the tube truss in the case of spatial non-planar connection.

Description

Technical Field

[0001] The invention relates to the technical field of large-span steel structures, and in particular to an installation method for a plug-in plate connection structure of a hub-type node grid and a pipe truss. Background Art

[0002] The traditional space grid structure refers to a space structure formed by connecting rods and components arranged according to a certain pattern through nodes, including grids, curved grid shells, and three-dimensional trusses. The space grid structure system is widely used in industrial and civil buildings due to its good overall stiffness and superior technical and economic indicators, especially in large-span space structures. The nodes of traditional space grid structures are generally in the form of bolt balls or welded balls. The nodes are hinged, and the rods only transmit axial force, which is a two-force rod unit. In addition, when connecting the grid frames, the on-site nodes are mostly located at high altitudes, and the length of the high-strength bolts screwed into the bolt balls is difficult to judge by the naked eye, which makes supervision very difficult and prone to quality problems such as "false tightening". The welding volume of the welded balls is large, and the welding is high in the air, so it is not easy to ensure the welding quality.

[0003] The current grid structure has adopted the mortise and tenon hub node to replace the traditional space grid structure. The connection of the new hub node grid adopts the plug-in connection, with cover plates at both ends. The rod can be inserted into the node to complete the reliable connection. If the steel pipe is not inserted into the node, the cover plate cannot be installed at all, and the entire structural system cannot be installed. The reliability of the node connection quality is fundamentally guaranteed. Compared with the traditional grid, the hub node grid structure system is simple and beautiful, and the node connection is novel, unique and light.

[0004] The production of mortise and tenon hub nodes is completely prefabricated in the factory, the processing and manufacturing process is simpler, there is no need to install a large number of bolts during on-site construction, and the node has a high bearing capacity. The hub node grid adopts a unique mortise and tenon connection node, which has higher node connection safety and more guaranteed connection quality; it has better performance in bearing dynamic loads such as wind and earthquake, and the cross section of the rod is not weakened, and it can withstand composite load conditions such as tension, compression, bending, and shear; the node is close to consolidation and can withstand large bending moments and lateral loads, and its node safety is higher. In addition, the hub node is made of aluminum alloy, which has good corrosion resistance, long service life, and low later maintenance cost. While effectively bearing force, it also plays a role in the superior corrosion resistance of aluminum alloy materials. The rods are made of galvanized steel pipes to ensure the good usability of the structure in a corrosive environment.

[0005] In the prior art, a Chinese invention patent with publication number CN109138164A discloses a clamping plate support for an aluminum alloy hub node grid, comprising: a retaining portion having a fixed end plate and a first blocking end plate and a second blocking end plate arranged in parallel on one side of the fixed end plate, wherein a positioning groove suitable for inserting the hub node is formed between the two blocking end plates and the fixed end plate, and the two blocking end plates form a blocking clamping structure at both axial ends of the hub node; a locking assembly comprising a through-piece passing through the first blocking end plate, the hub node, and the second blocking end plate in sequence along the axial direction of the hub node, and a locking member suitable for limiting the axial displacement of the through-piece along the hub node; a connecting member suitable for connecting the retaining portion to an object to be connected.

[0006] This type of clamping plate support uses a retaining part and a connecting piece with a clamping sealing structure to fix the hub node on the object to be connected. The structure of this type of clamping plate support is relatively complex. In the process of installing the hub node, the hub node needs to be placed in the positioning groove of the retaining part, and the bolt holes on the first and second sealing end plates on the retaining part are aligned with the through holes in the center of the hub node, so that the hub node and the retaining part can be fixed together through the through-piece and the locking piece. This connection method has high requirements on the processing accuracy of the bolt holes on the first and second sealing end plates of the retaining part and the installation ability of the construction personnel. The bolt holes on the sealing end plates and the through holes on the hub node often do not match at the construction site, so that the bolt holes are expanded on site. Expanding the holes will lead to a decrease in the connection strength between the clamping plate support and the hub node, thus burying hidden dangers for the safe use of the space grid structure.

[0007] Therefore, how to provide a hub node connection structure that is easy to install, has high construction efficiency, and is safe and reliable is still a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the technical problems of complicated installation, low construction efficiency and low safety and reliability in the hub node connection structure between the web members of the hub node grid and the chord members of the tube truss in the prior art.

[0009] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0010] In a first aspect, the present invention provides a plug-in plate connection structure of a hub-type node grid and a tube truss, comprising:

[0011] Connecting plates, at least two of which are butted against each other on the outside of the chord of the tube truss and clamped and fixed to the chord;

[0012] The plug-in plates have at least two pieces, one end of which is fixed to the connecting plate along a direction intersecting the axial direction of the tube truss, and the other end of which has a connecting portion that cooperates with the hub node of the grid through mortise and tenon joints.

[0013] Furthermore, the hub node and the chord of the tube truss are not coplanar, and the multiple rods of the grid are connected to the hub node by mortise and tenon joints through plugs at the ends.

[0014] Furthermore, the cross section of the chord is cylindrical or elliptical, the connecting plate is in the shape of an arc sheet, and at least two connecting plates are fixed to the outer side of the chord by welding or bolting at both ends.

[0015] Furthermore, there are two plug-in plates, which together with the connecting plate form a triangular structure between the chord and the hub node.

[0016] Furthermore, the plug board is fixed to the connecting plate by welding.

[0017] Furthermore, one end of the plug board connected to the connecting plate has a notch matched with the outer shape of the connecting plate.

[0018] Further, the axial direction of the hub node is perpendicular to the axial direction of the chord.

[0019] Furthermore, the connecting portion is a plug formed at one end of the plug board, and each of the plugs is matched with each of the slots on the hub node by mortise and tenon.

[0020] Further, the hub node includes:

[0021] The hub body is a column with a plurality of slots circumferentially formed on the outer edge;

[0022] Two cover plates, respectively covering two ends of the hub body along the axial direction of the hub body;

[0023] A screw rod passes through the two cover plates and the hub body along the axial direction of the hub body;

[0024] Two locking nuts are respectively threadably connected to the external threads at both ends of the screw rod and are respectively limited at the outer sides of the two cover plates.

[0025] In a second aspect, the present invention further provides a method for installing a plug-in plate connection structure of a hub-type node grid and a tube truss, comprising the following steps:

[0026] S1, inserting the two flattened plug-in boards into the hub node tooling, and welding and fixing the connecting plate on the two plug-in boards to form a plug-in board connector;

[0027] S2, take out the hub node tooling, and install the plug-in connector and the hub node;

[0028] S3, butting the connection plates of at least two plug-in plate connectors to the outer sides of the upper chord of the tube truss on site.

[0029] The technical solution of the present invention has the following advantages:

[0030] 1. The plug-in plate connection structure of the hub-type node grid and the tube truss provided by the present invention is prefabricated in the factory during the installation process, and the connecting part at one end of the plug-in plate is matched with the mortise and tenon of the hub node. At the construction site, after the rod body of the hub-type node grid is connected to the hub node, the two connecting plates are butt-welded to both sides of the chord of the tube truss, so that the rod body of the hub-type node grid can be reliably installed on the chord of the tube truss through the hub node longitudinal direction, meeting the requirement of forming a combined structure of the hub-type node grid and the tube truss on different planes, and having the advantages of simple structure, convenient installation and high safety and reliability.

[0031] 2. The plug-in plate connection structure of the hub-type node grid and the tube truss provided by the present invention, wherein two plug-in plates and a connecting plate form a triangular support structure between the tube truss chord and the hub node, can ensure a reliable connection between the hub node and the tube truss chord.

[0032] 3. The plug-in plate connection structure of the hub-type node grid and the tube truss provided by the present invention, each component of the plug-in plate connection structure can be prefabricated and assembled in the factory, and can be pre-connected with the hub node. During on-site construction, it is only necessary to weld and position the connecting plate of the plug-in plate connection structure and the chord of the tube truss; the difficulty and workload of on-site construction are greatly reduced, and the welding is all on the surface, which is easy to supervise and detect, reducing safety hazards.

[0033] 4. The plug-in plate connection structure of the hub-type node grid and the tube truss provided by the present invention has multiple connecting plates of the plug-in plate connection structure fixed to the outside of the tube truss chord by docking and clamping, which facilitates the appropriate adjustment of the installation position of the plug-in plate connection structure on the tube truss chord and reduces the requirements for the accuracy of the installation position. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of a three-dimensional structure in which a hub-type node grid and a tube truss chord are connected by a plug-in plate connector is provided for an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of an elevation structure in which a hub-type node grid and a tube truss chord are connected by a plug-in plate connector is provided for an embodiment of the present invention.

[0037] Explanation of the reference numerals: 1. chord rod; 2. rod body; 3. connecting plate; 4. plug plate; 41. notch; 42. plug; 5. hub node; 51. hub body; 52. cover plate; 53. screw rod; 54. locking nut. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] At present, in the space structure composed of a tube truss and a hub node grid, the hub node grid includes a hub node and a plurality of rods, and the plurality of rods are connected through the hub node in a certain grid form to form a space structure, which is a grid. The tube truss refers to a lattice structure formed by connecting round rods at the ends. The chord of the tube truss is connected between multiple tube truss webs, which can avoid the tube truss web from being subjected to concentrated loads or bending, so that the load is transferred to the chord of the tube truss or the node, reducing the requirements for the cross-sectional size of the tube truss web. The hub node grid is used to fill the space unit of the tube truss, connect with the tube truss, and form a combined frame in the same plane or different planes as the tube truss.

[0043] like Figure 1 As shown, in order to realize the connection between the hub-type node grid and the tube truss on different planes, the present invention provides a plug-in plate connection structure of the hub-type node grid and the tube truss, and the hub-type node grid is longitudinally connected to the tube truss through a plug-in plate connector.

[0044] The plug-in plate connection structure includes a connection plate 3 and two plug-in plates 4 respectively fixed on the connection plate 3. Specifically, one end of the two plug-in plates 4 is fixed on the connection plate 3 in a direction intersecting with the axial direction of the tube truss and not coplanar in the space frame composed of the hub node grid and the tube truss, and the other end of the plug-in plate 4 has a connection part that cooperates with the hub node 5 of the grid by mortise and tenon. Through this plug-in plate connection structure, the hub node grid can be longitudinally connected to the chord 1 of the tube truss, realizing the connection requirements of the hub node grid and the tube truss on different planes.

[0045] Moreover, during the installation of the hub node grid and the tube truss, the hub node 5 and the plug-in plate connection structure can be installed in the factory. At the construction site, it is only necessary to dock the connecting plates 3 of the multiple plug-in plate connection structures on the outside of the chord 1 of the tube truss to achieve the connection between the hub node grid and the tube truss, which has the advantages of simple structure and convenient installation. At the same time, since the two plug-in plates 4 are fixed to the connecting plates 3 in a direction intersecting with the axial direction of the chord 1, and the plug-in plates 4 and the rod body 2 of the grid are both installed on the hub node 5 along the circumference of the hub node 5, the rod body 2 of the hub node grid can be longitudinally connected to the chord 1 of the tube truss through the hub node 5, meeting the need for the hub node grid to be longitudinally connected to the tube truss through the hub node 5 in some cases.

[0046] In this embodiment, the axial direction of the hub node 5 is not coplanar with the axial direction of the tube truss chord 1. Furthermore, the axial direction of the hub node 5 is perpendicular to the axial direction of the tube truss upper chord 1; and the rod body 2 of the hub node grid is installed on the hub node 5 around the axial direction of the hub node 5. In this way, the rod body 2 of the hub node grid can be installed on the tube truss chord 1 in the longitudinal direction.

[0047] In this embodiment, the cross section of the chord 1 of the tube truss is cylindrical, and the connecting plates 3 are two arc-shaped sheets. The two connecting plates 3 are fixed to the two sides of the chord 1 of the tube truss by welding or bolting at both ends, which can ensure the reliable connection between the hub node grid and the tube truss; at the same time, it is also convenient to properly adjust the installation position of the connecting plate 3 on the chord 1 of the tube truss, reducing the requirements for the accuracy of the installation position. In other embodiments, the cross section of the chord 1 can also be elliptical, square or other irregular shapes, and the shape of the connecting plate 3 can be any shape that matches the shape of the chord 1. In addition, the number of connecting plates 3 can also be three or more, as long as they are welded or bolted to the outer periphery of the chord 1 in sequence to form a closed shape and clamped to the outer periphery of the chord 1. When the connecting plate 3 and the chord 1 are connected by welding, since the material of the hub node 5 is aluminum alloy, it is necessary to avoid a certain distance during welding, and the distance between the welding position and the hub node 5 should be kept above 100mm to avoid the hub node 5 from heating and deformation.

[0048] In this embodiment, two plug-in plates 4 and the connecting plate 3 form a triangular support structure between the chord 1 and the hub node 5 to ensure a reliable connection between the hub node 5 and the tube truss.

[0049] In this embodiment, two plug-in boards 4 are fixed to the connecting plate 3 by welding. In the process of welding the two plug-in boards 4 and the connecting plate 3 into a plug-in board connection structure, the plug-in board 4 with one end flattened is first inserted into the hub node tooling, and then the connecting plate 3 is connected to the plug-in board 4. After welding, the hub node tooling is taken out, and a new aluminum alloy hub node 5 is placed and pre-assembled with the plug-in board 4. By positioning the plug-in board 4 with the hub node tooling, the plug-in board 4 can be welded to the connecting plate 3 at a precise installation angle. During on-site construction, the connection plate 3 of the plug-in board connection structure is welded and positioned with the chord 1 on the tube truss to realize the connection between the hub node grid and the tube truss; the difficulty and workload of on-site construction are greatly reduced, and the welding is all on the surface, which is easy to supervise and detect, reducing safety hazards.

[0050] In this embodiment, one end of the plug board 4 connected to the connection board 3 has a notch 41 that matches the shape of the connection board 3. The notch 41 of the plug board 4 is cut along the intersecting line on the plug board 4 by using an intersecting line cutting machine before being welded to the connection board 3. The notch 41 on the plug board 4 facilitates welding and fixing the plug board 4 and the connection board 3 together, thereby improving the strength and reliability of the plug board connection structure.

[0051] In this embodiment, the connection part is specifically a plug 42 formed at one end of the plug board 4, and each plug 42 is matched with each slot on the hub node 5 by mortise and tenon. Mortise and tenon matching refers to a connection method in which two interconnected components adopt a concave-convex combination, which is commonly used for the connection of wooden components and is also used for the connection of steel structures here. As long as the connection is achieved by using a concave-convex combination, it belongs to the mortise and tenon matching of this application.

[0052] In this embodiment, the hub node 5 includes: a hub body 51, which is a cylinder with a plurality of slots circumferentially opened on the outer edge; two cover plates 52, which are respectively sealed on the two ends of the hub body 51 along the axial direction of the hub body 51; a screw 53, which passes through the two cover plates 52 and the hub body 51 along the axial direction of the hub body 51; two locking nuts 54, which are respectively threadedly connected to the external threads at the two ends of the screw 53, and are respectively limited on the outside of the two cover plates 52.

[0053] The embodiment of the present invention further provides a method for installing a plug-in plate connection structure of a hub-type node grid and a tube truss, comprising the following steps:

[0054] Step S1, inserting the two flattened plug-in boards 4 into the hub node tooling, and welding and fixing the connecting plate 3 on the two plug-in boards 4 to form a plug-in board connector;

[0055] Step S2, taking out the hub node tooling, installing the plug-in board connector and the hub node 5;

[0056] Step S3, docking the connecting plates 3 of at least two plug-in plate connectors on the outer side of the upper chord 1 of the tube truss on site.

[0057] The plug-in plate connection structure of the hub node grid and the tube truss adopts the above-mentioned installation method to connect the hub node grid and the tube truss together. The plug-in plate connection structure is welded in the factory and pre-installed with the hub node 5. During on-site construction, it is only necessary to connect the rod body 2 of the hub node grid with the hub node 5, and weld the connecting plate 3 of the plug-in plate connection structure to the chord 1 on the tube truss. The difficulty and workload of on-site construction are greatly reduced, and the welding is all on the surface, which is easy to supervise and detect, reducing safety hazards.

[0058] To summarize, the plug-in plate connection structure of the hub node grid and the tube truss provided in the embodiment of the present invention is prefabricated in the factory and preinstalled together with the hub node 5 during the installation process. At the construction site, after the rod body 2 of the hub node grid is connected to the hub node 5, the two connecting plates 3 are butt-welded to both sides of the chord 1 of the tube truss, so that the rod body 2 of the hub node grid can be reliably installed on the chord 1 of the tube truss through the hub node longitudinal direction, thereby meeting the requirements of forming a combined structure of the hub node grid and the tube truss on different planes.

[0059] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A method for installing a plug-in plate connection structure of a hub-type node grid and a tube truss, characterized in that: The plug-in plate connection structure of the hub-type node grid and the tube truss comprises: a connection plate (3), at least two of which are butt-jointed on the outer side of the chord (1) of the tube truss and clamped and fixed to the chord (1); a plug-in plate (4), at least two of which are fixed to the connection plate (3) along a direction intersecting the axial direction of the tube truss and the other end of which has a connection portion that cooperates with the hub node (5) of the grid by mortise and tenon joints; the hub node (5) and the chord (1) of the tube truss are not coplanar; The installation method includes the following steps: S1, inserting the two flattened plug-in boards (4) into the hub node tooling, and welding and fixing the connecting plate (3) on the two plug-in boards (4) to form a plug-in board connector; S2, take out the hub node tooling, and install the plug-in plate connector and the hub node (5); S3, butting the connection plates (3) of at least two plug-in plate connectors on the outside of the upper chord (1) of the tube truss on site.

2. The installation method of the hub-type node grid and the plug-in plate connection structure of the tube truss according to claim 1 is characterized in that: The multiple rod bodies (2) of the grid are connected to the hub node (5) through mortise and tenon joints via plugs at the ends.

3. The installation method of the hub-type node grid and the plug-in plate connection structure of the tube truss according to claim 1 is characterized in that: The cross section of the chord (1) is cylindrical or elliptical, the connecting plate (3) is in the shape of an arc plate, and at least two connecting plates (3) are fixed to the outside of the chord (1) by welding or bolting at both ends.

4. The installation method of the hub-type node grid and the plug-in plate connection structure of the tube truss according to claim 3 is characterized in that: There are two plug-in plates (4), which together with the connecting plate (3) form a triangular structure between the chord (1) and the hub node (5).

5. The installation method of the hub-type node grid and the plug-in plate connection structure of the tube truss according to claim 1 is characterized in that: The plug board (4) is fixed to the connecting plate (3) by welding.

6. The installation method of the hub-type node grid and the plug-in plate connection structure of the tube truss according to claim 1 is characterized in that: One end of the plug board (4) connected to the connecting board (3) has a notch (41) that matches the outer shape of the connecting board (3).

7. The installation method of the hub-type node grid and the plug-in plate connection structure of the tube truss according to claim 1 is characterized in that: The axial direction of the hub node (5) is perpendicular to the axial direction of the chord (1).

8. The installation method of the hub-type node grid and the plug-in plate connection structure of the tube truss according to claim 1 is characterized in that: The connecting portion is a plug (42) formed at one end of the plug board (4), and each of the plugs (42) is matched with each of the slots on the hub node (5) by mortise and tenon joints.

9. The installation method of the plug-in plate connection structure of the hub-type node grid and the tube truss according to claim 8 is characterized in that: The hub node (5) comprises: The hub body (51) is a column with a plurality of slots circumferentially formed on the outer edge; Two cover plates (52) are respectively sealed at two ends of the hub body (51) along the axial direction of the hub body (51); A screw (53) passes through the two cover plates (52) and the hub body (51) along the axial direction of the hub body (51); Two locking nuts (54) are respectively threadedly connected to the external threads at both ends of the screw rod (53) and are respectively positioned outside the two cover plates (52).

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