T-shaped composite material node connecting structure

Abstract

The utility model belongs to the field of composite material engineering, and discloses a T-shaped composite material node connecting structure which is respectively fixed on two sides of a T-shaped junction of a main beam and a cross beam through a first connecting piece and a second connecting piece, and realizes fastening connection through bolts and mounting screw holes. Convex point silica gel layers are arranged on the inner walls of the middle parts of the two connecting pieces, and energy dissipation gaskets are embedded into the inner walls and cling to the outer wall of the main beam. The salient point silica gel layer provides certain elasticity and friction force, and the energy dissipation gasket can absorb energy through deformation when being impacted. When the structure is subjected to strong impact such as earthquakes, the energy dissipation gasket firstly absorbs and disperses energy, and the elasticity of the salient point silica gel layer is beneficial for the structure to restore to the original position after the impact. According to the structure, the anti-impact capacity of the joint is enhanced, automatic reset after impact is achieved, joint damage caused by energy transfer is effectively relieved, and the problems that an existing composite material joint connecting structure is insufficient in energy consumption and cannot reset automatically are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of composite material engineering technology, specifically relates to a T type composite material node connecting structure. BACKGROUND

[0002] With the development of science and technology, composite materials have been widely used in many fields due to their light weight, high strength, corrosion resistance and other excellent properties. Basalt fiber composite materials have shown great application potential and value in the photovoltaic support field due to their unique performance and environmental properties, meeting the increasing requirements of structural performance and complying with the sustainable development goal of green energy industry. Although basalt fiber composite materials have great potential and advantages in photovoltaic support applications, one of the important challenges in practical applications of composite materials is their connection. Traditional connection methods include gluing, riveting and bolt connection, but these methods have certain limitations. In contrast, riveting and bolt connection can greatly improve the strength and stiffness of composite material connection. However, the complexity of such connection processes cannot be ignored: on the one hand, the installation of the backing plate nut usually requires additional tooling equipment and precise operation, increasing the complexity of the manufacturing process; on the other hand, the local stress concentration generated during the riveting process may cause micro-cracks in the composite material, posing a potential threat to the long-term stability of the photovoltaic support. Composite materials also have high process requirements.

[0003] Currently, researchers have addressed the above connection problems, such as Chinese patent publication CN119483436A, which proposes a non-hole connection energy-dissipating basalt fiber photovoltaic support; the overall support uses non-hole connection, effectively dispersing stress and avoiding local stress concentration; however, this method has the defect of insufficient energy dissipation under strong impact such as earthquakes; and in the energy dissipation design of existing node connection structures, most use passive energy absorption of damping rubber bodies, but cannot achieve post-earthquake resetting, and metal reinforcing members cannot effectively alleviate node damage caused by energy transmission.

[0004] Therefore, the existing composite material node connection structure cannot achieve automatic resetting after impact and has weak impact resistance. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of T type composite material node connecting structure to solve the technical problem that the existing composite material node connecting structure cannot achieve automatic resetting after impact and has weak impact resistance.

[0006] To achieve the above purpose, the utility model adopts the following technical contents:

[0007] The utility model provides a T type composite material node connecting structure, including first connecting piece and second connecting piece,

[0008] The first connecting piece is fixed to one side of the T type intersection of the main beam and the cross beam, and the second connecting piece is fixed to the other side of the T type intersection of the main beam and the cross beam.

[0009] The top of the first connecting piece is bolted to the top of the cross beam, the middle part is sleeved on the main beam, and the first mounting screw hole arranged at the bottom is used for fastening, so that the first connecting piece is fastened and connected to the main beam.

[0010] The top of the second connecting piece is bolted to the bottom of the cross beam, the middle part is sleeved on the main beam, and the second mounting screw hole arranged at the bottom is used for fastening, so that the second connecting piece is fastened and connected to the main beam.

[0011] The middle inner wall of the first connecting piece and the second connecting piece is provided with a convex point silica gel layer.

[0012] The convex point silica gel layer is provided with a energy consumption gasket, and the energy consumption gasket is tightly arranged close to the outer wall of the main beam.

[0013] Further, the top of the first connecting piece is provided with an adjustable angle hinge, the first hinge of the adjustable angle hinge is connected with the first connecting piece, a fastening screw hole is arranged on the second hinge, and the top of the cross beam is bolted through the fastening screw hole.

[0014] Further, the top of the second connecting piece is provided with an adjustable angle hinge, the first hinge of the adjustable angle hinge is connected with the second connecting piece, a fastening screw hole is arranged on the second hinge, and the bottom of the cross beam is bolted through the fastening screw hole.

[0015] Further, the opening and closing angle range of the adjustable angle hinge is -15~15°.

[0016] Further, the energy consumption gasket is made of shape memory alloy.

[0017] Further, the convex point silica gel layer is connected to the middle inner wall of the first connecting piece and the second connecting piece by means of gluing.

[0018] Further, the convex point height of the convex point silica gel layer is 0.1~0.3mm, and the density is 50-100 / cm².

[0019] Further, the first connecting piece adopts a split type metal hoop.

[0020] Further, the second connecting piece adopts a split type metal hoop.

[0021] Further, the outer surfaces of the first connecting member and the second connecting member are provided with ribs.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The utility model provides a kind of T-shaped composite material node connecting structure, and the T-shaped intersection of first connecting member and second connecting member is fixed at the both sides of main beam and crossbeam respectively, and fastening connection is realized using bolt and mounting screw hole.Two connecting member middle inner wall are provided with convex point silica gel layer, and are inlayed with energy dissipation gasket close to main beam outer wall.Convex point silica gel layer provides certain elasticity and friction, and energy dissipation gasket can absorb energy by deformation when being impacted.When being impacted by strong impact such as earthquake, energy dissipation gasket first absorbs and disperses energy, and the elasticity of convex point silica gel layer is helpful to structure to restore to original position after impact.This structure not only enhances the impact resistance of node, but also realizes automatic reset after impact, effectively relieves the damage of node caused by energy transmission, solves the problem of insufficient energy dissipation and unable to reset automatically of existing composite material node connecting structure.

[0024] Preferably, in the utility model, the adjustable angle hinge provided at the top of the first connecting member allows a certain angle adjustment range between the connecting member and the crossbeam, enhancing the flexibility and adaptability of the structure.The fastening screw hole and the crossbeam are bolted, ensuring the stability of the connection, and facilitating installation and maintenance.

[0025] Preferably, in the utility model, the adjustable angle hinge is also provided at the top of the second connecting member, so that the entire T-shaped node connecting structure has angle adjustment capability on both sides, further improving the flexibility and adaptability of the structure, meeting the needs of different installation scenarios.

[0026] Preferably, in the utility model, the opening and closing angle range of the adjustable angle hinge is limited to-15°~15°, which not only ensures the stability of the structure, but also provides sufficient adjustment space, so that the structure can more flexibly adapt to various deformations and displacements during installation and use.

[0027] Preferably, in the utility model, the energy dissipation gasket is made of shape memory alloy, so that the gasket can restore to original shape after being deformed by impact, enhancing the self-resetting capability of the node, and the shape memory alloy also has good energy dissipation performance, further improving the impact resistance of the structure.

[0028] Preferably, in the utility model, the convex point silica gel layer is connected to the inner wall of the connecting member by adhesive bonding, ensuring the stability and durability of the convex point silica gel layer, so that the structure can maintain good energy dissipation performance and elasticity during long-term use.

[0029] Preferably, in the utility model, the height and density of the convex points of the convex point silica gel layer are reasonably designed, enough friction and elasticity are ensured, and excessive friction resistance and stress concentration are avoided, so that the structure can disperse energy more evenly when impacted.

[0030] Preferably, in the utility model, the first connecting piece and the second connecting piece are both split type metal hoops, convenient to install and disassemble, and the metal hoops have good strength and rigidity, so that the stability and reliability of the connection can be ensured; the main beam is wrapped by the split type metal hoops, the drilling process required by traditional bolt connection is avoided, and the integrity of the main beam composite material fiber is protected.

[0031] Preferably, in the utility model, the outer surfaces of the first connecting piece and the second connecting piece are provided with ribs, the bending strength and rigidity of the connecting pieces are enhanced, so that the structure can resist deformation and displacement more stably when impacted by lateral force. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A connection schematic view of a T-shaped composite material node connecting structure provided by the embodiment of the utility model;

[0033] Figure 2 A structure schematic view of the first connecting piece or the second connecting piece of the T-shaped composite material node connecting structure provided by the embodiment of the utility model;

[0034] Figure 3 An application schematic view of the T-shaped composite material node connecting structure on a photovoltaic support provided by the embodiment of the utility model.

[0035] REFERENCE SIGNS:

[0036] 1, cross beam; 2, main beam; 3, first connecting piece; 4, second connecting piece; 5, fastening screw hole; 6, first mounting screw hole; 7, energy dissipation gasket; 8, second mounting screw hole; 9, convex point silica gel layer; 10, adjustable angle hinge. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clearly and clearly, the following specific embodiments are used to further explain the utility model. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application but not all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0040] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0041] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0042] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0043] In the description of the embodiments of the present application, it should also be noted that unless otherwise explicitly specified and limited, if the terms "set", "mount", "connected", "connected" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In existing energy dissipation designs, most rely on damping rubber bodies for passive energy absorption, which cannot achieve post-earthquake recovery. Metal reinforcements or optimized hole designs alleviate the problem, but fail to effectively address node damage caused by energy transfer. This invention introduces an energy dissipation device that solves the above problems through a dual mechanism of "mechanical connection + energy dissipation synergy," significantly reducing the risk of structural damage from dynamic loads.

[0045] The present invention will now be described in further detail with reference to the accompanying drawings:

[0046] like Figure 1 As shown, this embodiment provides a T-shaped composite material node connection structure, including: a first connector 3, a second connector 4, a fastening screw hole 5, a first mounting screw hole 6, an energy-dissipating gasket 7, a second mounting screw hole 8, a raised silicone layer 9, and an adjustable angle hinge 10.

[0047] Among them, the crossbeam 1 and main beam 2 on the photovoltaic support are both made of composite materials, namely basalt fiber composite materials.

[0048] Combination Figure 2 As shown, the first connector 3 and the second connector 4 are fixedly connected at the intersection of the main beam 2 and the crossbeam 1. The first connector 3 is located on one side of the intersection, and the second connector 4 is located on the other side of the intersection. Ensure that the first connector 3 and the second connector 4 are tightly fitted to the main beam 2 and the crossbeam 1 respectively, without leaving any gaps.

[0049] In this embodiment, the specific dimensions and connection angles of the first connector 3 and the second connector 4 can be determined according to the required connection strength and rigidity. Meanwhile, a variable angle hinge 10 is provided at the right angle of the first connector 3 and the second connector 4. The first hinge of the variable angle hinge 10 is connected to the first connector 3 or the second connector 4, and its second hinge is connected to the crossbeam 1. A certain deformation allowance is provided to ensure the connection effect.

[0050] The first connecting piece 3 and the second connecting piece 4 are connected to the crossbeam 1 using bolts with fastening screw holes 5. The first connecting piece 3 has a first mounting screw hole 6 at its bottom; the second connecting piece 4 has a second mounting screw hole 8 at its bottom. Both the first mounting screw hole 6 and the second mounting screw hole 8 are fixed with bolts, thereby locking the square clamps of the first connecting piece 3 and the second connecting piece 4 to the main beam 2, and transferring the load through the clamps. A raised silicone layer 9 is bonded to the inner surface of the square clamps of the first connecting piece 3 and the second connecting piece 4, allowing the raised silicone layer 9 to make flexible contact with the energy-dissipating pad 7. The energy-dissipating pad 7 is disposed between the outer surface of the main beam 2 and the raised silicone layer 9. In this embodiment, as... Figure 2 As shown, the first mounting screw hole 6 and the second mounting screw hole 8 can adopt the same structure and are not specially distinguished.

[0051] In this embodiment, the outer surfaces of the first connecting member 3 and the second connecting member 4 are provided with ribs, which can enhance the overall shear strength of the connecting structure.

[0052] The embodiment provides a T-shaped composite material node connecting structure, and the specific principle is as follows.

[0053] First, the energy absorption mechanism of the energy dissipation device is designed.

[0054] Material and structure design: the energy dissipation pad 7 is made of super-elastic shape memory alloy SMA, and the convex silicone layer 9 is made of high-damping silicone. In the initial stage of impact, the SMA absorbs energy through phase change and resets. In the initial stage of external load impact, the SMA layer of the energy dissipation pad 7 undergoes martensitic phase change, and 60% to 80% of the impact energy is dissipated through hysteresis, and high-frequency vibration energy is absorbed. In the final stage of impact, the SMA returns to its original state after unloading, and the high-damping rubber layer of the convex silicone layer 9 elastically releases residual energy, avoiding structural resonance; the convex height of the convex silicone layer 9 is 0.1-0.3mm; the density is 50-100 / cm².

[0055] The energy dissipation pad 7 and the convex silicone layer 9 have a synergistic effect: the convex silicone layer 9 is cemented on the inner surface of the square hoop of the first connecting member 3 and the second connecting member 4, and the energy dissipation pad 7 is embedded in the inner surface of the convex silicone layer 9, forming a “flexible transition layer” to reduce the interface stress peak by 30% to 50%, and dissipate additional energy through frictional sliding.

[0056] Second, the main beam adopts a non-damage connecting structure design.

[0057] Drill-free hoop technology: the first connecting member 3 and the second connecting member 4 are both split-type metal hoops, which wrap the main beam 2 to avoid the drilling process required by traditional bolt connection and protect the integrity of the composite material fibers of the main beam 2. The first connecting member 3 and the second connecting member 4 both adopt an adjustable angle hinge 10 with a hinged structure, allowing for ±15° angle adjustment to adapt to construction errors and dynamic deformation and avoid stress concentration caused by rigid connection. Of course, in this embodiment, the first connecting member 3 and the second connecting member 4 can be completely the same structure to ensure better structural symmetry.

[0058] Third, the interface between the composite material and the metal is optimized.

[0059] Anti-slip design: the inner surface of the first connecting member 3 and the second connecting member 4 is compounded with a micro-convex silicone layer 9, which inhibits interface slip through micro occlusion effect and provides a secondary energy dissipation path.

[0060] For example, Figure 3As shown, under the action of wind load and snow load in the force system, the main beam 2 is a tension-compression member, and the cross beam 1 is a bending member. In such a force form, the bending strength of the main beam 2 and the tensile and compressive strength of the cross beam 1 determine the size of the external load that can be resisted. Therefore, in the process of actually resisting the load: the mounting bolt 5 of the cross beam 1 will not bear a large load to cause shear slip failure of the bolt hole. The main beam 2 needs to transfer the load received by the upper structure of the photovoltaic support downward to the connection, and the connection mode of the square hoop instead of the bolt hole makes the main beam 2 can bear larger external load, and enhances the overall integrity of the material.

[0061] Therefore, the embodiment provides a T-shaped composite material node connection structure, which has the following advantages compared with the existing connection structure:

[0062] Firstly, the connection structure is simple and can be assembled without complex processing technology, simplifying the production process and reducing the cost. The first connecting piece and the second connecting piece both have a hinge structure, which can adjust the connection angle and significantly enhance the mechanical properties of the connection part. The hoop connection mode can eliminate the stress concentration of the bolt hole, and improve the safety and durability of the overall structure.

[0063] Secondly, according to the force form of the single-column photovoltaic support, the "drill-free hoop + hierarchical energy dissipation" double mechanism design is innovatively adopted. The inner surface of the first connecting piece and the second connecting piece is provided with an energy dissipation gasket of super-elastic shape memory alloy SMA, which effectively prevents the relative slip between the connecting piece and the main beam 2, and can enhance the energy dissipation capacity of the node through elastic deformation. At the same time, the convex point silica gel layer provided on the inner surface of the first connecting piece and the second connecting piece, the convex point is 0.1-0.3mm high, and the density is 50-100 / cm², which optimizes the stress distribution and inhibits the interface slip. The super-elastic shape memory alloy Ni-Ti alloy of the energy dissipation gasket has a thickness ratio of 40%-60%, which can dissipate 60%-80% of the energy through SMA phase change when impacted, and realizes automatic reset after unloading.

[0064] In summary, the T-shaped composite joint connection structure has a unique design concept and superior performance, providing an effective way to solve the problem of composite material connection. This structure not only simplifies the production process and improves work efficiency, but also greatly improves the comprehensive mechanical properties of the connection part, which is of great significance for promoting the application of composite materials in more fields. For example: in the field of building earthquake resistance, the bolt pre-tightening torque can be set to 30-50 N·m, which is suitable for high load requirements; in the field of aerospace, the first connecting piece material is changed to titanium alloy, and the energy dissipation gasket thickness is reduced by 20%, meeting the weight reduction requirement. Using this structure not only enhances the impact resistance of the joint, but also realizes automatic resetting after impact, effectively alleviating the damage to the joint caused by energy transfer, solving the problem of insufficient energy dissipation and inability to automatically reset of the existing composite material joint connection structure.

[0065] The above embodiment is only one of the implementation manners of the technical scheme of the present application, and the scope of protection of the present application is not limited to the above embodiment, but also includes any changes, substitutions and other implementation manners easily thought of by those skilled in the art within the technical scope disclosed by the present application.

Claims

1. A T-joint composite node connection structure, characterized by, The first connecting piece (3) and the second connecting piece (4) are arranged on the T-shaped intersection of the main beam (2) and the cross beam (1). The first connecting piece (3) is arranged on one side of the T-shaped intersection of the main beam (2) and the cross beam (1), and the second connecting piece (4) is arranged on the other side of the T-shaped intersection of the main beam (2) and the cross beam (1). The top of the first connecting piece (3) is bolted to the top of the cross beam (1), the middle of the first connecting piece (3) is sleeved on the main beam (2), and the first mounting screw hole (6) arranged at the bottom of the first connecting piece (3) is used to fasten the first connecting piece (3) to the main beam (2). The top of the second connecting piece (4) is bolted to the bottom of the cross beam (1), the middle of the second connecting piece (4) is sleeved on the main beam (2), and the second mounting screw hole (8) arranged at the bottom of the second connecting piece (4) is used to fasten the second connecting piece (4) to the main beam (2). The middle inner wall of the first connecting piece (3) and the middle inner wall of the second connecting piece (4) are provided with convex point silica gel layers (9). The inner wall of the convex point silica gel layer (9) is provided with a energy consumption gasket (7), and the energy consumption gasket (7) is arranged close to the outer wall of the main beam (2).

2. The T-joint composite node connection structure of claim 1, wherein, The top of the first connecting piece (3) is provided with an adjustable angle hinge (10), the first hinge of the adjustable angle hinge (10) is connected with the first connecting piece (3), the second hinge is provided with a fastening screw hole (5), and the top of the cross beam (1) is bolted to the second hinge through the fastening screw hole (5).

3. The T-joint composite node connection structure of claim 1, wherein The top of the second connecting piece (4) is provided with an adjustable angle hinge (10), the first hinge of the adjustable angle hinge (10) is connected with the second connecting piece (4), the second hinge is provided with a fastening screw hole (5), and the bottom of the cross beam (1) is bolted to the second hinge through the fastening screw hole (5).

4. The T-joint composite structure according to claim 2 or 3, characterized in that, The opening and closing angle range of the adjustable angle hinge (10) is -15-15°.

5. The T-joint composite node connection structure of claim 1, wherein The energy consumption gasket (7) is made of shape memory alloy.

6. The T-joint composite node connection structure of claim 1, wherein The convex point silica gel layer (9) is connected to the middle inner wall of the first connecting piece (3) and the second connecting piece (4) by gluing.

7. The T-composite joint connection structure of claim 1, wherein The convex point height of the convex point silica gel layer (9) is 0.1-0.3mm, and the density is 50-100 / cm².

8. The T-composite joint connection structure of claim 1, wherein The first connecting piece (3) is a split type metal clamp.

9. The T-composite joint connection structure of claim 1, wherein The second connecting piece (4) is a split type metal clamp.

10. The T-joint composite node connection structure of claim 1, wherein, The outer surfaces of the first connecting piece (3) and the second connecting piece (4) are provided with ribs.

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