Net rack structure

Abstract

The utility model belongs to the technical field of constructional engineering, and particularly relates to a grid structure which comprises an upper chord member, a lower chord member, web members and bolts. A plurality of upper chord nodes are arranged on the upper chord, and the upper chord is divided into an upper transverse rod and an upper longitudinal rod which are crossed with each other; a plurality of lower chord nodes are arranged on the lower chord, and the lower chord is divided into a lower transverse rod and a lower longitudinal rod which are crossed with each other; each lower cross rod is located below a gap between every two adjacent upper cross rods; each lower longitudinal rod is located below a gap between every two adjacent upper longitudinal rods; the web members are V-shaped; the web members and the lower chord members are fixedly connected through bolts penetrating through the middle nodes of the web members and the nodes of the lower chord members; and the web members and the upper chord members are fixedly connected through bolts penetrating through the end nodes of the web members and the nodes of the upper chord members. According to the scheme, the connecting nodes are integrated on the chord members and the web members, during assembling, bolts are used for penetrating through the connecting nodes, the installation of the grid structure can be achieved, the disassembly and assembly difficulty and the requirements for installation and construction personnel are reduced, the engineering efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction engineering, and particularly relates to a grid structure. Background Art

[0002] Traditional grid structures are generally composed of components such as rods, nodes, bolts, sleeves, and jackscrews. While this structure offers advantages such as high load capacity and large spans, making it widely used in roof coverings for buildings such as stadiums and exhibition halls, the traditional bolt-and-ball grid structure also has obvious disadvantages: a large number of components, complex processing and installation processes, and the near-impossibility of controlling the steel content below 10kg / ㎡. These disadvantages make it cost-effective and construction-ineffective in low-load and low-span scenarios.

[0003] Taking the most widely used upright tetrahedral bolt ball grid as an example, a double-layer grid with a 5*5 grid requires a total of 200 rods (400 cone heads or cover plates that need to be welded and polished), 61 ball nodes (461 holes need to be drilled on the node balls), 400 high-strength bolts, 400 sleeves, and 400 top screws.

[0004] Because fabrication often involves multiple processes, such as cutting, welding, grinding, and drilling, on-site installation, especially when the number and variety of components are diverse, requires specialized truss installation workers. This requires a high level of experience and a long installation cycle. Furthermore, traditional bolt-and-ball truss structures often require welding of some components during fabrication, and corrosion and rust prevention cannot be completed on some components before assembly, impacting the process flow, cycle time, and cost. Utility Model Content

[0005] In order to solve the above problems existing in the prior art, this solution provides a grid structure.

[0006] The technical solution adopted by this utility model is:

[0007] A grid structure comprises an upper chord, a lower chord, a web and bolts;

[0008] The upper chord is provided with a plurality of upper chord nodes, and the upper chord is divided into an upper transverse rod and an upper longitudinal rod; the upper transverse rod and the upper longitudinal rod are cross-connected at the upper chord nodes;

[0009] The lower chord is provided with a plurality of lower chord nodes, and the lower chord is divided into a lower cross bar and a lower longitudinal bar; the lower cross bar is located below the gap between two adjacent upper cross bars; the lower longitudinal bar is located below the gap between two adjacent upper longitudinal bars; the lower cross bar and the lower longitudinal bar are cross-connected at the lower chord node;

[0010] The web member is V-shaped, with a web member middle node provided in the middle of the web member and a web member end node provided at the end of the web member; bolts passing through the web member middle node and the lower chord node fix the web member to the lower chord; bolts passing through the web member end node and the upper chord node fix the web member to the upper chord.

[0011] As an alternative or supplement to the above-mentioned grid structure: the upper chord node, lower chord node, web middle node and web end node are all flat structures with holes in the middle; the upper and lower surfaces of the flat structure are flat, and the holes on the flat structure pass through the upper and lower surfaces of the flat structure.

[0012] As an alternative or supplement to the above-mentioned grid structure: the length of the flat structure is not less than its width.

[0013] As an alternative or supplement to the above-mentioned grid structure: a plurality of web member middle nodes and a plurality of bottom chord member nodes are vertically overlapped and vertically penetrated by bolts to achieve fixed connection.

[0014] As an alternative or supplement to the above-mentioned grid structure: a plurality of web member end nodes and a plurality of upper chord member nodes are vertically overlapped and vertically penetrated by bolts to achieve fixed connection.

[0015] As an alternative or supplement to the above-mentioned grid structure: two mutually intersecting web members are connected at the lower chord node, and the middle nodes of the two web members are vertically overlapped and connected.

[0016] As an alternative or supplement to the above-mentioned grid structure: the projection of the grid structure on the horizontal plane is in the shape of a rice grid; the projection of the structure after several upper chords are connected on the horizontal plane is in the shape of a field grid; the projection of the structure after several lower chords are connected on the horizontal plane is in the shape of a field grid.

[0017] As an alternative or supplement to the above-mentioned truss structure: the web member includes a first oblique rod segment and a second oblique rod segment, and the first oblique rod segment and the second oblique rod segment are divided into an eight-shaped section; the middle node of the web member is arranged between the first oblique rod segment and the second oblique rod segment, and the ends of the first oblique rod segment and the second oblique rod segment are both provided with web member end nodes.

[0018] As an alternative or supplement to the above-mentioned truss structure: the upper chord, lower chord and web are processed from solid or hollow rods; different parts of the upper chord are flattened and punched by mechanical equipment to form upper chord nodes; different parts of the lower chord are flattened and punched by mechanical equipment to form lower chord nodes; the middle part of the web is flattened, punched and bent by mechanical equipment to form a middle node of the web; the ends of the web are flattened, punched and bent by mechanical equipment to form end nodes of the web.

[0019] The beneficial effects of the present invention are as follows: in this solution, connection nodes are integrated on the chords and webs. During assembly, the installation of the grid structure can be achieved by passing bolts through each connection node, which reduces the difficulty of disassembly and assembly and the requirements for installation and construction personnel, improves project efficiency, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of this solution or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0021] Figure 1 It is a three-dimensional diagram of the grid structure in this scheme;

[0022] Figure 2 It is a top view of the grid structure in this scheme;

[0023] Figure 3 It is a side view of the grid structure in this scheme;

[0024] Figure 4 It is a structural diagram of the upper chord;

[0025] Figure 5 It is a structural diagram of the belly bar;

[0026] Figure 6 (a) and (b) are diagrams of the web member before and after the end node is connected;

[0027] Figure 7 (a) and (b) are diagrams of the states before and after the middle node of the web is connected;

[0028] Figure 8 This is a structural diagram of another type of belly bar.

[0029] In the figure: 1-upper chord; 1a-upper cross bar; 1b-upper longitudinal bar; 101-upper chord node; 2-lower chord; 2a-lower cross bar; 2b-lower longitudinal bar; 3-web member; 301-middle node of web member; 302-first diagonal bar segment; 303-second diagonal bar segment; 304-end node of web member; 4-screw; 5-nut; 6-washer. DETAILED DESCRIPTION

[0030] The technical solution in this embodiment will be clearly and completely described below in conjunction with the accompanying drawings. The described embodiments are only a part of the embodiments, not all of them. Based on the embodiments in this solution, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this solution.

[0031] Example 1

[0032] like Figures 1 to 7As shown, this embodiment designs a grid structure, including upper chord 1, lower chord 2, web 3 and bolts. The bolts are composed of screws 4 and nuts 5, and the nuts 5 are threadedly connected to the screws 4.

[0033] The upper chord 1 is a hollow or solid member, equipped with several upper chord nodes 101. These nodes 101 are flat structures with holes in the middle. The upper and lower surfaces of the flat structures are flat, and the holes extend through the flat structures. The upper chord nodes 101 can be welded to the upper chord 1 or machined from the upper chord 1. Different parts of the upper chord 1 are mechanically flattened and perforated to form the nodes 101.

[0034] The upper chord 1 is divided into an upper transverse bar 1a and an upper longitudinal bar 1b; the upper transverse bar 1a and the upper longitudinal bar 1b are cross-connected at the upper chord node 101; the projection of the structure after several upper chords 1 are connected on the horizontal plane is in the shape of a grid.

[0035] The lower chord 2, similar in structure to the upper chord 1, is a hollow or solid member. It is equipped with several lower chord nodes, which are flat structures with holes in the middle. The flat structures have smooth upper and lower surfaces, and the holes extend through them. The lower chord nodes can be welded to the lower chord 2 or machined from the lower chord 2. Different parts of the lower chord 2 are mechanically flattened and perforated to form the lower chord nodes.

[0036] The lower chord 2 is divided into a lower cross bar 2a and a lower longitudinal bar 2b. The lower cross bar 2a is located below the gap between two adjacent upper cross bars 1a; the lower longitudinal bar 2b is located below the gap between two adjacent upper longitudinal bars 1b; the lower cross bar 2a and the lower longitudinal bar 2b are cross-connected at the lower chord node; the projection of the structure after several lower chords 2 are connected on the horizontal plane is in the shape of a grid.

[0037] The web member 3 is made of a hollow or solid rod and is V-shaped. A web member middle node 301 is provided in the middle of the web member 3, and a web member end node 304 is provided at the end of the web member 3. The middle of the web member 3 is flattened, punched and bent by mechanical equipment to form the web member middle node 301. The end of the web member 3 is flattened, punched and bent by mechanical equipment to form the web member end node 304.

[0038] The web member 3 includes a first oblique rod segment 302 and a second oblique rod segment 303, and the first oblique rod segment 302 and the second oblique rod segment 303 are divided into an eight-shaped portion; the web member middle node 301 is arranged between the first oblique rod segment 302 and the second oblique rod segment 303, and the ends of the first oblique rod segment 302 and the second oblique rod segment 303 are both provided with web member end nodes 304.

[0039] like Figure 6 As shown. The first oblique rod section 302 and the second oblique rod section 303 can be a structure formed by bending the same rod at the middle node 301 of the web. Figure 8 As shown, the first oblique rod segment 302 and the second oblique rod segment 303 may also be two separate rods, and the oblique lower ends of the first oblique rod segment 302 and the second oblique rod segment 303 overlap and are connected to each other to form a web member middle node 301.

[0040] The upper chord node 101, lower chord node, mid-web node 301, and end-web node 304 are all flat structures with a hole in the middle. The flat structures have flat upper and lower surfaces, and the hole extends through the upper and lower surfaces of the flat structures. Furthermore, the length of the flat structures, such as the upper chord node 101, lower chord node, mid-web node 301, and end-web node 304, is no less than their width.

[0041] During assembly of the top chord 1, bottom chord 2, and web members 3, the following components are assembled: The multiple web member mid-nodes 301 and the multiple bottom chord nodes overlap vertically. Bolts running vertically through the web member mid-nodes 301 and the bottom chord nodes securely connect the web members 3 to the bottom chord 2. Washers 6 are provided at the connections between the bolts and the web member mid-nodes 301 and the bottom chord nodes. The multiple web member end nodes 304 and the multiple top chord nodes 101 overlap vertically. Bolts running vertically through the web member end nodes 304 and the top chord nodes 101 securely connect the web members 3 to the top chord 1. Washers 6 are provided at the connections between the bolts and the web member end nodes 304 and the top chord nodes 101.

[0042] Two intersecting web members 3 are connected at each lower chord node, and the middle web member nodes 301 of the two web members 3 are vertically overlapped and connected, so that the projection of the grid structure on the horizontal plane is in the shape of a crossbar.

[0043] The above embodiments are merely examples for the purpose of illustrating the present invention clearly and are not intended to limit the embodiments. It is not necessary and impossible to enumerate all embodiments here. Obvious changes or modifications derived therefrom are still within the scope of protection of this technology.

Claims

1. A grid structure, characterized in that: It comprises an upper chord (1), a lower chord (2), a web (3) and bolts; The upper chord (1) is provided with a plurality of upper chord nodes (101), and the upper chord (1) is divided into an upper transverse rod (1a) and an upper longitudinal rod (1b); the upper transverse rod (1a) and the upper longitudinal rod (1b) are cross-connected at the upper chord nodes (101); The lower chord (2) is provided with a plurality of lower chord nodes, and the lower chord (2) is divided into a lower crossbar (2a) and a lower longitudinal bar (2b); the lower crossbar (2a) is located below the gap between two adjacent upper crossbars (1a); the lower longitudinal bar (2b) is located below the gap between two adjacent upper longitudinal bars (1b); the lower crossbar (2a) and the lower longitudinal bar (2b) are cross-connected at the lower chord node; The web member (3) is V-shaped, a web member middle node (301) is provided in the middle of the web member (3), and a web member end node (304) is provided at the end of the web member (3); bolts passing through the web member middle node (301) and the lower chord node are used to fixedly connect the web member (3) to the lower chord (2); bolts passing through the web member end node (304) and the upper chord node (101) are used to fixedly connect the web member (3) to the upper chord (1).

2. The grid structure according to claim 1, characterized in that: The upper chord node (101), the lower chord node, the web middle node (301) and the web end node (304) are all flat structures with holes in the middle; the upper and lower surfaces of the flat structures are flat, and the holes on the flat structures penetrate the upper and lower surfaces of the flat structures.

3. The grid structure according to claim 2, characterized in that: The length of the flat structure is not less than its width.

4. The grid structure according to claim 2, wherein: A plurality of web member middle nodes (301) and a plurality of lower chord member nodes are vertically overlapped and vertically penetrated by bolts to achieve fixed connection.

5. The grid structure according to claim 2, characterized in that: A plurality of web member end nodes (304) and a plurality of upper chord member nodes (101) are vertically overlapped and vertically penetrated by bolts to achieve fixed connection.

6. The grid structure according to any one of claims 1 to 5, characterized in that: Two mutually intersecting web members (3) are connected at the lower chord node, and the web member middle nodes (301) of the two web members (3) are vertically overlapped and connected.

7. The grid structure according to claim 6, characterized in that: The projection of the grid structure on the horizontal plane is in the shape of a rice grid; the projection of the structure after the plurality of upper chords (1) are connected on the horizontal plane is in the shape of a field grid; the projection of the structure after the plurality of lower chords (2) are connected on the horizontal plane is in the shape of a field grid.

8. The grid structure according to any one of claims 1 to 5, characterized in that: The web member (3) comprises a first oblique rod section (302) and a second oblique rod section (303), wherein the first oblique rod section (302) and the second oblique rod section (303) are divided into an eight-shaped section; a web member middle node (301) is arranged between the first oblique rod section (302) and the second oblique rod section (303), and web member end nodes (304) are provided at the ends of the first oblique rod section (302) and the second oblique rod section (303).

9. The grid structure according to any one of claims 1 to 5, characterized in that: The upper chord (1), lower chord (2) and web (3) are processed from solid or hollow rods; different parts of the upper chord (1) are flattened and punched by mechanical equipment to form an upper chord node (101); different parts of the lower chord (2) are flattened and punched by mechanical equipment to form a lower chord node; the middle part of the web (3) is flattened, punched and bent by mechanical equipment to form a web middle node (301); the end of the web (3) is flattened, punched and bent by mechanical equipment to form a web end node (304).

Images