Novel composite material grid structure

Abstract

The utility model relates to the technical field of grid structures, in particular to a novel composite grid structure which comprises a plurality of node connecting pieces, first chord members and second chord members fixedly penetrate through the node connecting pieces, the first chord members and the second chord members are perpendicularly distributed at 90 degrees, each node connecting piece is provided with a plurality of web members, and the web members are connected with the node connecting pieces. The web members, the first chord members, the second chord members and the node connecting pieces jointly form an upper-layer grid structure and a lower-layer grid structure, the first chord members and the second chord members are of an integral structure, the node connecting pieces are connected to the integral chord members in a sleeved mode, the web members are fixedly connected among the node connecting pieces at the same time, and therefore the flat grid structure is formed. Compared with a chord member section by section, the whole chord member is higher in structural strength, the chord members and the node connecting pieces are connected in a penetrating mode, the node connecting pieces, the chord members and the web members are welded through the FRP composite material welding technology, the welding area is a face type area, and the welding strength is high.

Description

Technical Field

[0001] This utility model belongs to the field of space frame structure technology, specifically relating to a novel composite material space frame structure. Background Technology

[0002] Flat plate space frame structure is a type of spatial structure. It consists of multiple members connected according to certain rules to form an integral planar or near-planar grid structure. This type of structure is widely used in large-span buildings, such as stadiums, exhibition centers, airport waiting halls, and gas stations, because they can provide large column-free spaces and have good mechanical properties.

[0003] The connection nodes of existing flat plate space frame structures are usually hollow steel balls, also called node balls, which are divided into welded balls and bolted balls, corresponding to welded ball space frame structures and bolted ball space frame structures. The chords are connected section by section by node balls to form a mesh structure. The chords are independent of each other, resulting in poor structural strength. Moreover, the strength of the overall mesh structure is limited by the quality of the connecting bolts and welding, making it difficult to guarantee the overall structural strength. Furthermore, flat plate space frame structures are usually made of steel, which will corrode and rust under long-term use, requiring regular manual maintenance and increasing maintenance costs. Utility Model Content

[0004] The purpose of this utility model is to provide a novel composite material space frame structure that is simple in structure and reasonably designed in order to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A novel composite material space frame structure includes several node connectors. Each node connector has a first chord and a second chord fixedly inserted through it, and the first chord and the second chord are perpendicularly distributed at a 90-degree angle. Each node connector is provided with several web members, and the web members, the first chord, the second chord, and the node connector together form a space frame structure with upper and lower layers.

[0007] The node connector includes a chord mounting hole, a first fixing block, a second fixing block, and a first mounting bolt hole. The first fixing block is fixedly connected to the top center of the second fixing block, and the first fixing block has two first mounting bolt holes for installing the web members. The second fixing block has two chord mounting holes. The top of the second fixing block and the four side walls of the first fixing block are all first mounting mating surfaces.

[0008] Preferably, both the first chord and the second chord are integral structures, and both the first chord and the second chord pass through the chord mounting holes on the node connector, and the node connector is an FRP composite material molded part.

[0009] Preferably, the web member includes a No. 2 mounting bolt hole, an L-shaped mounting plate, and a connecting rod, and both ends of the connecting rod are fixedly connected to the L-shaped mounting plate. The L-shaped mounting plate has two No. 2 mounting bolt holes, and both outer walls of the L-shaped mounting plate are No. 2 mounting mating surfaces.

[0010] Preferably, the two chord mounting holes on the second fixing block are perpendicularly distributed at a 90-degree angle, and the two first mounting bolt holes on the first fixing block are perpendicularly distributed at a 90-degree angle.

[0011] Preferably, a welded joint layer gap is reserved between the inner wall of the chord mounting hole and the outer wall of the first chord, between the inner wall of the chord mounting hole and the outer wall of the second chord, and between the first mounting joint surface and the second mounting joint surface.

[0012] Preferably, the inner wall of the chord mounting hole and the outer wall of the first chord, the inner wall of the chord mounting hole and the outer wall of the second chord, and the first mounting mating surface and the second mounting mating surface are all welded and fixed using FRP composite material welding technology, and the welding material is FRP composite material.

[0013] Preferably, the first chord, the second chord, the node connector, and the web member are all made of FRP composite material.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. Both the first and second chords of this utility model are integral structures, meaning that the chords on the same straight line are a single piece. Multiple node connectors are sleeved on the integral chord, and web members are also fixedly connected between the multiple node connectors to form a flat grid structure. Compared with individual chord sections, the integral chord structure is stronger.

[0016] 2. The chord and node connector of this utility model are through-type connections. The through holes and chords, and the node connectors and web members are welded using FRP composite material welding technology, which further improves the overall rigidity and strength of the space frame structure. Moreover, the welding area is a surface area, which is different from the welding area of ​​ordinary welded ball space frames, which is a line or a loop. The welding area is larger, which improves the welding firmness.

[0017] 3. The chords, node connectors, and web members of the grid structure of this utility model are all made of FRP composite material, which has the characteristics of being lightweight and high-strength, insulating and free from magnetic interference, having high mechanical strength, and being corrosion resistant. It has the ability to resist corrosion for a long time in marine, saline-alkali, desert, and field environments, and can be maintenance-free throughout the entire life cycle of the equipment structure. It is suitable for application in civil engineering, power engineering, and marine engineering, especially in marine photovoltaic and fishery-solar hybrid projects that need to cope with strong typhoons and highly corrosive environments. Attached Figure Description

[0018] Figure 1 This is a three-dimensional view of the overall structure of this utility model;

[0019] Figure 2 This is the utility model Figure 1 Enlarged view of region A in the middle;

[0020] Figure 3 This is a schematic diagram of the installation of the node connector, chord, and web member of this utility model;

[0021] Figure 4 This is a perspective view of the node connector of this utility model;

[0022] Figure 5 This is a three-dimensional view of the web member of this utility model;

[0023] Figure 6 This is a partial sectional view of the end of the web member of this utility model.

[0024] In the diagram: 1. First chord; 2. Second chord; 3. Node connector; 31. Chord mounting hole; 32. First fixing block; 33. Second fixing block; 34. First mounting bolt hole; 4. Web member; 41. Second mounting bolt hole; 42. L-shaped mounting plate; 43. Connecting rod. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0026] Example

[0027] Please see Figure 1 and Figure 2 A novel composite material space frame structure includes several node connectors 3. Each node connector 3 has a first chord 1 and a second chord 2 fixedly inserted through it, and the first chord 1 and the second chord 2 are perpendicularly distributed at a 90-degree angle. Each node connector 3 is provided with several web members 4. The web members 4, the first chord 1, the second chord 2, and the node connectors 3 together form an upper and lower two-layer space frame structure. The first chord 1 and the second chord 2 are designed as a single piece, and the node connectors 3 are sleeved and fixed on the first chord 1 and the second chord 2. The entire design structure has high strength.

[0028] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4The node connector 3 is an FRP composite material molded part. The node connector 3 includes a chord mounting hole 31, a first fixing block 32, a second fixing block 33, and a first mounting bolt hole 34. The first fixing block 32 is fixedly connected to the top center of the second fixing block 33, and the first fixing block 32 has two first mounting bolt holes 34 for installing the web member 4. The second fixing block 33 has two chord mounting holes 31. The top of the second fixing block 33 and the first fixing block 32... All four side walls are No. 1 mounting joint surfaces. No. 1 chord 1 and No. 2 chord 2 are both integral structures. The two chord mounting holes 31 on the No. 2 fixing block 33 are perpendicularly distributed at a 90-degree angle, and the two No. 1 mounting bolt holes 34 on the No. 1 fixing block 32 are perpendicularly distributed at a 90-degree angle. Both No. 1 chord 1 and No. 2 chord 2 pass through the chord mounting holes 31 on the node connector 3. One node connector 3 can install four web members 4, and the number of web members 4 can be adjusted according to different node positions.

[0029] Please see Figure 2 , Figure 3 and Figure 4 There are pre-reserved gaps for welding joint layers between the inner wall of the chord mounting hole 31 and the outer wall of the first chord 1, between the inner wall of the chord mounting hole 31 and the outer wall of the second chord 2, and between the first and second mounting joint surfaces. The inner wall of the chord mounting hole 31 and the outer wall of the first chord 1, between the inner wall of the chord mounting hole 31 and the outer wall of the second chord 2, and between the first and second mounting joint surfaces are all welded and fixed using FRP composite material welding technology. The welding material is FRP composite material, which is a composite material composed of resin and fiber. The fiber includes, but is not limited to, carbon fiber, glass fiber, aramid fiber, basalt fiber, etc.

[0030] Please see Figure 5 and Figure 6 The web member 4 is an integral part. The web member 4 includes a second mounting bolt hole 41, an L-shaped mounting plate 42 and a connecting rod 43. Both ends of the connecting rod 43 are fixedly connected to the L-shaped mounting plate 42. The L-shaped mounting plate 42 has two second mounting bolt holes 41, and both outer walls of the L-shaped mounting plate 42 are second mounting mating surfaces.

[0031] In use, the first step is to align the lower-level node connectors 3 with the same orientation, pass the first chord rod 1 through, and press... Figure 1First, arrange the dimensions according to the design, then pass the second chord member 2 vertically through the node connector 3 to initially calibrate the dimensions; second, install the web members 4 and the upper node connector 3 according to the drawing, install four web members 4 on each node connector 3 of the lower layer, one web member 4 on the node connector 3 at the four corners of the upper layer, two web members 4 on the four side node connectors, and four web members 4 on the other node connectors, and initially position them with bolts through the first mounting bolt hole 34 and the second mounting bolt hole 41; third, pass the first chord member 1 and the second chord member 2 of the upper layer through the connector in sequence. The upper node connector 3; the fourth step is to calibrate the overall dimensions for precise positioning and fix it initially with bolts; the fifth step is to weld each node connector 3 to the through chord 1, chord 2 and the connected web member 4 using FRP composite material welding technology. FRP composite material welding technology involves adding liquid FRP composite material into the reserved gap of the welding bonding layer, and then allowing it to self-cur at room temperature and pressure. Once curing is complete, the welding and fixing of chord 1, chord 2, node connector 3 and the connected web member 4 is completed.

[0032] This document uses the following description: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 In actual use, some details of the structure may be slightly modified, but all of these changes are within the scope of protection of this utility model, including but not limited to:

[0033] A. In this document, the first mounting bolt hole 34 and the second mounting bolt hole 41 for connecting the node connector 3 and the web member 4 are opened on the first mounting mating surface and the second mounting mating surface. One advantage is that four web members 4 can be connected with two bolts.

[0034] In application, the No. 1 mounting bolt hole 34 and the No. 2 mounting bolt hole 41 connecting the node connector 3 and the web member 4 can also be opened on another plane of the No. 1 mounting mating surface and the No. 2 mounting mating surface, but four bolts are needed to connect the four web members 4.

[0035] B. The intersection of the two No. 2 installation mating surfaces on the web member 4 can be appropriately chamfered or rounded to prevent workers from getting scratched during installation and to improve the safety of installation. Corresponding changes should be made to the node connector 3.

[0036] C. Holes can be made on the node connector 3 to reduce weight, which helps to reduce the overall weight. Refined structures that facilitate installation and welding can be added to the node connector 3, including but not limited to positioning holes and positioning blocks.

[0037] D. The specific structural details at both ends of the web member 4 can be flexibly modified, including adding some refined structures to facilitate installation and welding, including but not limited to positioning holes and positioning blocks;

[0038] E. The web member 4 can be a simple round tube. One to four sleeve positions are made on the node connector 3 to install and weld the web member 4. The advantage of this is that the web member 4 can be a simple round tube. However, compared with the web member 4 structure in this paper, the difficulty of accurate installation, positioning and welding is increased.

[0039] F. In cases where the overall structural stiffness and strength requirements are not high, the node connector 3 and the web member 4 are connected only by bolts and not by welding;

[0040] G. For the convenience of transportation, the first chord 1 and the second chord 2 of the whole structure are divided into several sections, and the adjacent ends are welded together by inserting the chord mounting holes 31 of the node connector 3. This solution is not as strong as the first chord 1 and the second chord 2 of the whole structure.

[0041] H. The material of the welded joint layer between node connector 3, chord 1 and chord 2, and between node connector 3 and web member 4 is only resin, without fiber. This method will result in a slightly weaker bonding strength.

[0042] Both the first chord 1 and the second chord 2 of this utility model are designed as a single piece, which results in higher structural strength compared to welding sections one by one. The inner wall of the chord mounting hole 31 and the outer wall of the first chord 1, the inner wall of the chord mounting hole 31 and the outer wall of the second chord 2, and the first mounting mating surface on the node connector 3 and the second mounting mating surface of the web member 4 are all welded using FRP composite material welding technology, and the welding area is a surface area. This welding mode can further improve the overall stiffness and strength of the space frame structure of this utility model.

[0043] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A novel composite material space frame structure, comprising several node connectors (3), characterized in that: Each node connector (3) has a first chord (1) and a second chord (2) fixedly inserted through it, and the first chord (1) and the second chord (2) are perpendicularly distributed at ninety degrees. Each node connector (3) is provided with several web members (4), and the web members (4), the first chord (1), the second chord (2) and the node connector (3) together form a two-layer grid structure. The node connector (3) includes a chord mounting hole (31), a first fixing block (32), a second fixing block (33), and a first mounting bolt hole (34). The first fixing block (32) is fixedly connected to the top center of the second fixing block (33), and the first fixing block (32) has two first mounting bolt holes (34) for installing the web member (4). The second fixing block (33) has two chord mounting holes (31). The top of the second fixing block (33) and the four side walls of the first fixing block (32) are all first mounting mating surfaces.

2. The novel composite material space frame structure according to claim 1, characterized in that: Both the first chord (1) and the second chord (2) are integral structures, and both the first chord (1) and the second chord (2) pass through the chord mounting hole (31) on the node connector (3), and the node connector (3) is an FRP composite material molded part.

3. The novel composite material space frame structure according to claim 1, characterized in that: The web member (4) includes a second mounting bolt hole (41), an L-shaped mounting plate (42) and a connecting rod (43), and both ends of the connecting rod (43) are fixedly connected to the L-shaped mounting plate (42). The L-shaped mounting plate (42) has two second mounting bolt holes (41), and both outer walls of the L-shaped mounting plate (42) are second mounting mating surfaces.

4. The novel composite material space frame structure according to claim 1, characterized in that: The two chord mounting holes (31) on the second fixing block (33) are perpendicularly distributed at ninety degrees, and the two first mounting bolt holes (34) on the first fixing block (32) are perpendicularly distributed at ninety degrees.

5. A novel composite material space frame structure according to claim 3, characterized in that: A welded joint layer gap is reserved between the inner wall of the chord mounting hole (31) and the outer wall of the first chord (1), between the inner wall of the chord mounting hole (31) and the outer wall of the second chord (2), and between the first mounting joint surface and the second mounting joint surface.

6. A novel composite material space frame structure according to claim 3, characterized in that: The inner wall of the chord mounting hole (31) and the outer wall of the first chord (1), the inner wall of the chord mounting hole (31) and the outer wall of the second chord (2), and the first mounting joint surface and the second mounting joint surface are all welded and fixed using FRP composite material welding technology, and the welding material is FRP composite material.

7. A novel composite material space frame structure according to claim 1, characterized in that: The first chord (1), the second chord (2), the node connector (3), and the web member (4) are all made of FRP composite material.

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