A composite high-strength composite material guardrail

Abstract

This utility model proposes a combined high-strength composite material guardrail, relating to the field of guardrail technology. The combined high-strength composite material guardrail includes a base, multiple horizontal beams, and multiple vertical posts. The vertical posts are evenly spaced on the base, and the horizontal beams are sequentially and evenly spaced on the vertical posts, forming a grid structure. The base, horizontal beams, and vertical posts are all made of BFRPE modified basalt fiber reinforced composite material. The horizontal beams and vertical posts are hollow structures, and each contains a honeycomb tube structure. This combined high-strength composite material guardrail can further improve interlaminar shear strength and impact resistance, greatly enhancing its collision resistance.

Description

Technical Field

[0001] This utility model relates to the field of guardrail technology, and more specifically, to a combined high-strength composite material guardrail. Background Technology

[0002] Steel plate guardrails are characterized by their aesthetic appeal and good visual guidance effect, but they also have disadvantages such as high energy consumption in production, heavy weight, difficult installation, high cost, inconvenient maintenance, and high upkeep costs. Furthermore, to prevent corrosion, their surface needs to be coated with anti-rust paint. Especially in coastal areas, steel guardrails are susceptible to corrosion from the marine climate, significantly shortening their lifespan. This is particularly true on highways where salting is done after snowfall in winter; the steel guardrails on the roadside and in the center of the road are even more prone to corrosion, requiring timely replacement, resulting in high maintenance costs and increasing the risk of traffic accidents. In addition, the use of steel guardrails consumes a large amount of steel, steel processing is energy-intensive, and causes serious pollution, which is detrimental to the environment. Fiber-reinforced resin-based composite materials are a new type of product developed to replace steel guardrails. For example, patent publication number CN107119603B discloses a basalt fiber-reinforced composite material highway guardrail. Based on the existing standard guardrail structure, reinforcing components are added to the hollow structure inside the highway guardrail, further enhancing the impact resistance of the posts and anti-blocking blocks. The highway guardrails are all made of basalt fiber reinforced composite material obtained by this invention and manufactured using a pultrusion process. Not only is the impact resistance performance significantly better than that of existing steel guardrail structures, but the composite material also has excellent corrosion resistance and can completely replace existing steel structure guardrails.

[0003] However, the aforementioned existing technical solutions still have at least the following problems: 1. Although basalt fiber has high tensile strength, as a composite material, basalt fiber reinforced composite material has relatively weak interlaminar shear strength and impact resistance. When subjected to impact (such as vehicle collisions), hollow guardrails made of basalt fiber reinforced composite material are prone to bending and localized damage. The aforementioned patented technology adds reinforcing ribs and plates inside the hollow columns, which can enhance the impact resistance to some extent. However, the protective effect of its internal petal-shaped reinforcing rib and plate structure is limited and needs further improvement. 2. The connection of poles made of BFRPE modified basalt fiber reinforced composite material (such as connections between poles and anchoring to the foundation) cannot be simply achieved by welding (which would damage the fibers and resin). Mechanical connections (bolts, clamps) or adhesive bonding are usually required. These connection methods require specialized design and construction techniques, demanding higher skills from installers, and improper handling can easily become a weak point. 3. Repairing guardrails made of BFRPE modified basalt fiber reinforced composite material is more complicated, usually requiring professional materials and processes. The performance after repair may not be as good as the original. In addition, even if only a local damage occurs, the entire section of basalt fiber reinforced composite material made by pultrusion process needs to be replaced, which will greatly increase the amount of material consumed. Utility Model Content

[0004] The purpose of this invention is to provide a combined high-strength composite material guardrail, which can further improve interlayer shear strength and impact resistance, and greatly enhance anti-collision strength.

[0005] The embodiments of this utility model are implemented as follows:

[0006] This application provides a combined high-strength composite material guardrail, including a base, multiple crossbeams, and multiple uprights. The uprights are evenly spaced on the base, and the crossbeams are sequentially and evenly spaced on the uprights, forming a grid structure. The base, crossbeams, and uprights are all made of BFRPE modified basalt fiber reinforced composite material. The crossbeams and uprights are hollow structures, and each crossbeam and upright contains a honeycomb tube structure.

[0007] In some embodiments of this utility model, the aforementioned crossbeams and uprights are integrally formed and connected with the honeycomb tube structure.

[0008] In some embodiments of this utility model, the above-mentioned crossbeam is composed of multiple short rods, and one end of any of the short rods is provided with an end cap. The end cap is provided with multiple hexagonal pins, and the multiple pins can be inserted into the holes of the honeycomb tube structure one by one.

[0009] In some embodiments of this utility model, a connector is provided between any two adjacent short rods. The connector includes two semi-clamps, each with an ear seat at both ends. Adjacent ear seats are connected by bolts, and the two semi-clamps form a clamping structure that can be clamped onto the upright. A through hole is coaxially opened on the two adjacent ear seats, and the two adjacent short rods extend into the through hole along both sides of the through hole. Furthermore, any pin extends into the hole of the honeycomb tube structure of the other short rod.

[0010] In some embodiments of this utility model, an elastic pad is provided between the two ear seats.

[0011] In some embodiments of this utility model, the base is a hollow structure, and a counterweight is provided inside the base.

[0012] In some embodiments of this utility model, the cross-section of the base is a frustum-shaped structure.

[0013] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:

[0014] This invention provides a combined high-strength composite material guardrail, in which a grid structure composed of multiple horizontal beams and multiple vertical posts forms the main body of the guardrail. The aforementioned base is used to install the vertical posts and also serves to support the grid structure. The base, horizontal beams, and vertical posts are all made of BFRPE-modified basalt fiber reinforced composite material, giving them the advantages of BFRPE-modified basalt fiber. Furthermore, making the horizontal beams and vertical posts hollow further reduces weight. Simultaneously, the honeycomb tube structure within the hollow structure has better compressive / bending stiffness. Therefore, placing the honeycomb tube structure within the horizontal beams and vertical posts reduces material consumption while converting point impacts into surface loads. This significantly reduces the interlaminar shear stress in the vertical posts and horizontal beams made of BFRPE-modified basalt fiber reinforced composite material, greatly improving the impact resistance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the clamp structure in an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the short rod in an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the honeycomb tube structure in an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the installation structure of the pin rod in an embodiment of this utility model.

[0021] Icons: 1-Base; 2-Crossbeam; 201-Short rod; 3-Upright pole; 4-Honeycomb tube structure; 5-End cap; 6-Pin rod; 7-Clamping structure; 701-Semi-clamping body; 8-Bolt; 9-Through hole. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] Example

[0026] Please refer to Figures 1-5 This embodiment provides a combined high-strength composite material guardrail, including a base 1, multiple crossbeams 2, and multiple uprights 3. The uprights 3 are evenly spaced on the base 1, and the crossbeams 2 are sequentially and evenly spaced on the uprights 3, forming a grid structure. The base 1, crossbeams 2, and uprights 3 are all made of BFRPE modified basalt fiber reinforced composite material. The crossbeams 2 and uprights 3 are hollow structures, and each contains a honeycomb tube structure 4.

[0027] The grid structure composed of multiple horizontal beams 2 and multiple vertical posts 3 is actually the main body of the guardrail. The aforementioned base 1 is used to install the vertical posts 3 and also serves to support the grid structure. The aforementioned base 1, horizontal beams 2, and vertical posts 3 are all made of BFRPE modified basalt fiber reinforced composite material, giving them the advantages of BFRPE modified basalt fiber. Based on the above, making the horizontal beams 2 and the vertical posts 3 into hollow structures can further reduce weight. At the same time, the honeycomb tube structure 4 set inside the hollow structure has better compressive / bending stiffness. Therefore, setting the honeycomb tube structure 4 inside the horizontal beams 2 and vertical posts 3 can, while reducing material consumption, convert point external impacts into surface loads, greatly reducing the interlaminar shear stress of the vertical posts 3 and horizontal beams 2 made of BFRPE modified basalt fiber reinforced composite material, and also greatly improving the impact resistance.

[0028] In some embodiments of this example, the honeycomb tube structure 4 and the crossbeam 2 are integrally formed. The honeycomb tube structure 4 and the upright 3 are also integrally formed. Specifically, in this example, the upright 3 and the crossbeam 2 are formed using a pultrusion process. Specifically, BFRPE modified basalt fiber reinforced composite material is placed in a barrel, and the raw material is propelled forward by the rotation of the screw. Under the action of the screw, the BFRPE modified basalt fiber reinforced composite material gradually plasticizes. When the set extrusion amount is reached, the screw extrudes the plasticized melt through the extrusion die, and finally, it enters the cooling water tank and is vacuum-formed in the sizing sleeve. In this example, the extrusion die is a honeycomb-shaped cylindrical die. After passing through the extrusion die, the melt naturally forms the upright 3 or crossbeam 2 integrally formed with the honeycomb tube structure 4. Integral forming not only improves production efficiency but also enhances structural strength, thereby further improving impact resistance.

[0029] Please refer to Figure 4 and Figure 5 In some embodiments of this example, the crossbeam 2 is composed of multiple short rods 201. One end of any of the short rods 201 is provided with an end cap 5, and the end cap 5 is provided with multiple hexagonal pins 6, which can be inserted into the holes of the honeycomb tube structure 4 one by one.

[0030] In this embodiment, the crossbeam 2 is composed of multiple short rods 201, allowing for modular installation. If one of the short rods 201 is damaged, only that short rod 201 needs to be replaced; the entire crossbeam 2 does not need to be replaced. An end cap 5 is provided at one end of each short rod 201 for mounting pins 6. Since the pins 6 are hexagonal and adaptable to the holes in the honeycomb tube structure 4, they can be inserted one-to-one into the holes of the honeycomb tube structure 4 of the adjacent short rod 201. This allows for the connection of two adjacent short rods 201, while the pins 6 further enhance bending stiffness, ensuring no weak points at the connection.

[0031] Please refer to Figure 1 and Figure 2 In some embodiments of this example, a connector is provided between any two adjacent short rods 201. The connector includes two semi-clamping bodies 701, each with an ear seat (not shown in the figure) at both ends. Adjacent ear seats are connected by bolts 8. The two semi-clamping bodies 701 form a clamping structure 7 that can be clamped onto the uprights 3. Two adjacent ear seats have coaxially extending through holes 9. Two adjacent short rods 201 extend into the through holes 9 along both sides, and any pin 6 extends into the hole of the honeycomb tube structure 4 of the other short rod 201. The clamping structure 7 is used to securely connect the short rods 201, and the connector is used to fix them onto the corresponding uprights 3, thereby fixing the crossbeam 2 composed of the corresponding short rods 201 onto multiple uprights 3. After the two semi-clamp bodies 701 are joined together by lugs on the same side, the two adjacent lugs are fixed with bolts 8. At the same time, the two adjacent short rods 201 are further fixed with through holes 9, so that the connection of the short rods 201 in the through holes 9 is protected. The bolts 8 on the lugs can withstand most of the shear force, which can further improve the bending stiffness of the connection of the short rods 201. Furthermore, the clamp structure 7 itself can also play a role in preventing impact.

[0032] In this embodiment, an elastic pad (not shown in the figure) is provided between the two earpieces. The elastic pad is used to protect the earpieces and prevent them from being damaged by direct contact. At the same time, it also provides a cushioning effect.

[0033] It should be noted that the aforementioned base 1, semi-hoop body 701, and ear seat are all made of BFRPE modified basalt fiber reinforced composite material.

[0034] In this invention, the base 1 is a hollow structure, and a counterweight is provided inside the base 1. The counterweight is mainly used to increase the weight of the base 1 to improve stability.

[0035] In this utility model, the cross-section of the base 1 is a frustum-shaped structure. The frustum-shaped structure can increase the contact area with the ground and further improve stability.

[0036] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A combined high-strength composite material guardrail, comprising a base, a plurality of beam rods and a plurality of upright rods, the plurality of upright rods being uniformly spaced on the base, and the plurality of beam rods being uniformly spaced in sequence on the plurality of upright rods and forming a grid structure with the plurality of upright rods, the base, the beam rods and the upright rods being made of BFRPE modified basalt fiber reinforced composite material, characterized in that, The crossbeam and the upright are hollow structures, and both the crossbeam and the upright are equipped with honeycomb tube structures. ​ 2. The modular high strength composite guardrail of claim 1, wherein, The crossbeams and the uprights are all integrally formed and connected to the honeycomb tube structure.

3. The modular high strength composite guardrail according to claim 1 or 2, wherein, The crossbeam is composed of multiple short rods, and one end of any of the short rods is provided with an end cap. The end cap is provided with multiple hexagonal pins, and the multiple pins can be inserted into the holes of the honeycomb tube structure one by one.

4. The combined high-strength composite material guardrail according to claim 3, characterized in that, A connector is provided between any two adjacent short rods. The connector includes two semi-clamps, each with an ear seat at both ends. Two adjacent ear seats are connected by bolts. The two semi-clamps form a clamp structure that can be clamped onto the upright. Two adjacent ear seats have coaxial through holes. Two adjacent short rods extend into the through holes along both sides of the through holes, and any pin extends into the hole of the honeycomb tube structure of the other short rod.

5. The combined high-strength composite material guardrail according to claim 4, characterized in that, An elastic pad is provided between the two ear seats.

6. The combined high-strength composite material guardrail according to claim 1, characterized in that, The base is a hollow structure, and a counterweight is installed inside the base.

7. The combined high-strength composite material guardrail according to claim 1, characterized in that, The base has a frustum-shaped cross-section.

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