CN109024385A - A kind of highway safety protective fence - Google Patents

Abstract

The invention discloses a highway safety guardrail structure, comprising: a guardrail fixed column and a guardrail body; the guardrail body further includes a guardrail outer plate, a guardrail inner plate; the guardrail outer plate, the guardrail inner plate Layers of energy-absorbing ball cells are arranged between the plates; the fixed column of the guardrail further includes a base, a sandwich tube and a reflective ball; wherein the sandwich tube consists of a hexagonal inner tube, an outer circular tube, and a hexagonal inner tube and an outer circular tube The energy-absorbing column cells between them are composed; the reflective ball is arranged on the top surface of the sandwich tube. The invention provides a highway guardrail with high-efficiency collision energy absorption, aiming to solve the problems of poor rigidity and poor energy absorption effect of the existing guardrail, which cannot effectively reduce the degree of damage after the collision of the car and the injuries suffered by the people on the car. . And optimize the weak link of common highway guardrails, that is, the secondary injury that may be caused by insufficient energy absorption when the car collides with the guardrail pillars.

Description

A road safety fence

technical field

The invention relates to the technical field of highway safety guardrails, in particular to a highway safety guardrail.

Background technique

With the continuous increase of car ownership, traffic accidents have become more frequent. Once an accident occurs on a highway with a high speed of the car, it will often cause unbearable damage. Highway accident damage, so higher performance requirements are put forward for highway safety barriers. The function of the highway guardrail is that when a traffic accident occurs, it can be used as an energy absorbing device to absorb the energy generated by the collision of the car, so as to avoid excessive energy being directly transmitted to the car and even the occupants of the car, which will damage the life and property of the occupants in the car. Safety has an effective protective effect. Therefore, the quality of the energy-absorbing performance of the guardrail directly affects the severity of the accident. However, the common guardrail structure on the expressway is too simple now, and cannot effectively absorb the energy after the collision of the car, so it cannot effectively reduce the damage to the car and the occupants in the car after the accident. Therefore, designing a high-efficiency energy-absorbing highway safety barrier has very important practical significance and practical value.

Contents of the invention

The purpose of the present invention is to solve the lack of safety performance of the existing road guardrails, and provide a road guardrail with high-efficiency collision energy absorption, which aims to solve the problem of poor rigidity and poor energy absorption effect of the existing guardrails, which cannot effectively reduce the damage caused by automobile collisions. The extent of the damage and the injuries suffered by the occupants of the vehicle. And optimize the weak link of common highway guardrails, that is, the secondary injury that may be caused by insufficient energy absorption when the car collides with the guardrail pillars.

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

A highway safety guardrail structure, comprising: a guardrail fixing platform post and a guardrail body;

The guardrail body further includes a guardrail outer panel and a guardrail inner panel; hierarchical energy-absorbing cells are arranged between the guardrail outer panel and the guardrail inner panel;

The fixed column of the guardrail further includes a base, a sandwich tube and a reflective ball; wherein the sandwich tube is composed of a hexagonal inner tube, an outer circular tube, and an energy-absorbing column cell between the hexagonal inner tube and the outer circular tube; the The reflective ball is arranged on the top surface of the sandwich tube.

In a preferred embodiment: the cross-section of the energy-absorbing cylindrical cells is a semicircle whose diameter is the side length of the hexagonal inner tube, and is tangent to the inner surface of the outer circular tube.

In a preferred embodiment: the hexagonal inner tube and the outer circular tube are made of carbon fiber material.

In a preferred embodiment: the reflective ball is made of PVC.

In a preferred embodiment: the outer panel of the guardrail is a double-layer panel formed by gluing aluminum panels and carbon fiber panels.

In a preferred embodiment: the inner panel of the guardrail is a single-layer panel made of aluminum alloy material, and the shape is wavy.

In a preferred embodiment: the material of the hierarchical energy-absorbing cells is aluminum.

In a preferred embodiment: one of the hierarchical energy-absorbing cells is composed of three hemispheres of different sizes, arranged in such a way that two small hemispheres are embedded in the diameter side of one large hemisphere, and the diameter sides of the two small hemispheres respectively continue Embed two smaller hemispheres, where the diameter of the hemisphere is twice the diameter of its embedded smaller hemisphere

Compared with the prior art, the beneficial effects of the present invention are as follows:

1. Simple structure, few parts, easy loading and unloading, labor saving, strong sustainability

The highway guardrail proposed by the present invention is mainly composed of two parts, the guardrail pillar and the guardrail body. The base, the sandwich tube and the reflective ball are composed of three parts, the structure is simple and the combination is convenient. And most of the structures are combined by welding or gluing. The various parts of the fence are also fully combined with its use to select materials. For example, the reflective ball is made of renewable PVC material, which is easy to maintain and has strong corrosion resistance. The reflective paint has a strong combination with it and a long service life.

2. Comprehensive and efficient energy absorption and good stability

The safety fence proposed by the present invention solves the weak link of the traditional highway fence, that is, the collision between the car and the fence pillar, so that the fence also has a good energy-absorbing effect in this case, effectively avoiding Safety incidents caused by insufficient energy absorption and hazards caused by guardrail pillars injuring occupants due to excessive collision force. In addition, the guardrail of the present invention has an efficient energy-absorbing effect. The guardrail body is composed of inner and outer plates and the energy-absorbing cells between them. When the car collides with the guardrail body, the collision energy is transmitted from the inner plate to the primary energy-absorbing cells, and the primary energy-absorbing cells are compressed and deformed. The collision energy is transferred to the two second-level energy-absorbing cells embedded in it, and the energy-absorbing characteristics of the first-level energy-absorbing cells are continued, and energy is absorbed step by step. Another significant benefit of hierarchical energy absorption is that it can effectively reduce Collision force, so as to achieve the buffer effect, with good energy absorption stability.

3. Good rigidity and crashworthiness

When the car collides with the main body of the guardrail, the energy-absorbing cells of the layers alternately start the energy-absorbing process. The energy absorption process of the energy-absorbing cell is that the collision energy is transferred from the inner plate to the first-level energy-absorbing cell. At the beginning, the inner plate and the first-level energy-absorbing cell are in point-surface contact. As the energy-absorbing process deepens, the point-surface contact becomes surface-to-surface contact. Contact and the range of surface-to-surface contact is also expanding, which will cause the inner panel of the anti-collision beam and the primary energy-absorbing cells to become a plane together, and then continue to act on the two secondary energy-absorbing cells embedded in the primary energy-absorbing cells. Energy cells, the working principle of the second-level energy-absorbing cells is similar to that of the first-level energy-absorbing cells, so as the collision process deepens, the thickness of the guardrail body is constantly decreasing, but the stiffness of the guardrail body is constantly increasing. So that the guardrail can have high rigidity after being hit. In addition, the outer panel of the guardrail is a double-layer board combined with carbon fiber and aluminum board. The aluminum board has good pressure resistance but insufficient tensile strength, while the carbon fiber board has good tensile strength. The double-layer board composed of these two materials can effectively Absorbing the advantages of both makes the double-layer board structure have higher strength. In summary, a double-layer panel made of carbon fiber and aluminum has a lower weight but higher strength than a metal panel of the same thickness. Therefore, the guardrail of the present invention can be used in bridges, tunnels, mountain slopes and other road conditions that require cars not to rush out of the road. Good rigidity can protect the car from rushing out of the road track after fully absorbing energy, thereby ensuring the life and safety of the driver. Property security.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is a sectional view of the guardrail pillar and the pillar sandwich tube;

Fig. 3 is a sectional view of the guardrail body;

In the figure: 1 is the pillar of the guardrail; 2 is the main body of the guardrail; 201 is the base; 202 is the sandwich tube; 203 is the reflective ball; 204 is the cross-sectional view of the sandwich tube; 301 is the inner plate of the guardrail; It is a hierarchical energy-absorbing sphere.

Detailed ways

The description will be further elaborated below in conjunction with specific embodiments. It should be noted that: the following examples are only used to illustrate the present invention, not to limit the technical solutions described in the present invention, and all technical solutions and improvements thereof that do not depart from the scope of the present invention should be included in the claims of the present invention.

Referring to Figures 1-3 , a road safety fence structure includes: a fence fixing column 1 and a fence body 2 . The guardrail body 2 mainly includes a guardrail outer panel 302, a guardrail inner panel 301, and hierarchical energy-absorbing cells 303 between the inner and outer panels.

The guardrail fixed column 1 is composed of a base 201, a sandwich tube 202 and a reflective ball 203, and the reflective ball 203 is arranged on the top surface of the sandwich tube 202 through epoxy resin. The sandwich tube 202 is composed of a hexagonal inner tube, an outer circular tube and energy-absorbing cylindrical cells between the inner and outer tubes, refer to the structure of 204 in FIG. 3 .

The base of the fixed column 1 of the guardrail is made of cast iron material, which is rigid enough and cost-effective. The material of the hexagonal inner tube and the outer circular tube of the sandwich tube 202 is made of carbon fiber. Since the outer tube is exposed to the outside for a long time, this requires the outer tube to have certain corrosion resistance and climate adaptability, so carbon fiber is selected as the material of the hexagonal inner tube and outer tube because carbon fiber has better properties than ordinary metal materials. Better corrosion resistance and good climate adaptability, which can ensure the service life of the fence and have good economic benefits; and the carbon fiber material has a low density, which is lighter than ordinary metal in the same volume, and is easy to transport and install , which can save manpower and material resources, and has good economic benefits.

The energy-absorbing column cell between the inner and outer tubes of the fixed column 1 of the guardrail is a semicircle with the side length of the hexagonal inner tube as the diameter, and is tangent to the inner surface of the outer circular tube. The purpose of the energy-absorbing column cells is to absorb a large amount of energy when the car collides with the fixed column 1 of the guardrail, which solves the problem of poor energy absorption effect when the collision position of the guardrail of the ordinary expressway is fixed on the column, and it is easy to aggravate the hazards of automobile accidents and possible secondary injuries.

When the car collides with the guardrail pillar, the outer circular tube of the guardrail pillar is first deformed by force, and then the collision force is transmitted to the energy-absorbing cylinder between the inner and outer tubes. Since the cross-section of the energy-absorbing cylinder is semicircular, and initially The position of the energy-absorbing deformation is the arc surface of the semicircle, so the energy-absorbing cylinder will gradually compress from the semicircle to a rectangle after the energy-absorbing deformation. The two energy-absorbing cells, this triggering mechanism can effectively use multiple energy-absorbing cells to absorb energy, improve the energy-absorbing efficiency, and this arrangement can also be well adapted to the car and the guardrail column The collision angle makes it have better safety performance.

The reflective ball 203 on the fixed column 1 of the guardrail chooses renewable PVC material to save energy, and the combination of PVC material and reflective coating is better than that of traditional metal, which makes the reflective coating difficult to fall off and shortens the maintenance cycle. Long, to a certain extent, reduce the labor force. In addition, the anti-aging performance of PVC material is also better than that of traditional steel, and PVC material has good climate adaptability, good rain corrosion resistance, long service life, cheap price and high cost performance.

The outer panel 302 of the guardrail is a double-layer board made of aluminum and carbon fiber boards. The aluminum material has good pressure resistance but insufficient tensile strength, while the carbon fiber board has good tensile strength. The combination of the two achieves complementary advantages , The role of promoting strengths and avoiding weaknesses. At the same time, aluminum and carbon fiber are materials with light weight and good energy absorption effect, which is conducive to realizing the purpose of lightweight. The inner panel 301 of the guardrail is a single-layer panel made of aluminum alloy, and its shape is relatively gentle and wavy. The layered energy-absorbing cells between the inner and outer panels are made of aluminum with good energy-absorbing effect. A hierarchical energy-absorbing sphere is composed of three hemispheres of different sizes. The arrangement is such that two small hemispheres are embedded in the diameter side of a large hemisphere, and two smaller hemispheres are embedded in the diameter sides of the two small hemispheres respectively. The diameter of the hemisphere is twice that of the smaller hemisphere embedded in it.

When the car collides with the guardrail body 2, the car first squeezes the inner panel, and the inner panel gradually expands from the original wave shape to a plane under the impact force, which helps to buffer the collision of the car, and the guardrail body 2 The energy-absorbing spheres between the inner and outer plates are just below the protruding part of the wave inner plate, which helps to trigger the energy-absorbing process of the energy-absorbing spheres, so that the energy-absorbing process of the guardrail body 2 can be carried out in an orderly manner. When the pressure of the inner plate is transmitted to the energy-absorbing spheres of the layers, the largest energy-absorbing spheres begin to bear force, and gradually change from the initial point-to-surface contact to surface-to-surface contact, and the contact area increases accordingly, playing a certain role. Buffer function, when the first-level energy-absorbing spheres are fully squeezed, the pressure will be transmitted to the embedded second-level energy-absorbing spheres, and similarly to the third-level energy-absorbing spheres. Therefore, this arrangement has good hierarchical energy absorption characteristics as well as good stability and buffering effect.

The above is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any person familiar with the technical field can use this concept to carry out the present invention within the technical scope disclosed in the present invention. Non-substantial changes all belong to the act of violating the protection scope of the present invention.

Claims (8)

1. A highway safety guardrail structure, characterized in that it comprises: a guardrail fixed stand and a guardrail body; The guardrail body further includes a guardrail outer panel and a guardrail inner panel; hierarchical energy-absorbing cells are arranged between the guardrail outer panel and the guardrail inner panel; The fixed column of the guardrail further includes a base, a sandwich tube and a reflective ball; wherein the sandwich tube is composed of a hexagonal inner tube, an outer circular tube, and an energy-absorbing column cell between the hexagonal inner tube and the outer circular tube; the The reflective ball is arranged on the top surface of the sandwich tube. 2. A highway safety guardrail structure according to claim 1, characterized in that: the cross-section of the energy-absorbing column cell is a semicircle with the side length of the hexagonal inner tube as the diameter, and the outer circle Tangent to the inner surface of the tube. 3. A highway safety fence structure according to claim 1, characterized in that: said hexagonal inner tube and outer circular tube are made of carbon fiber material. 4. A highway safety fence structure according to claim 1, characterized in that: said reflective ball is made of PVC. 5. A highway safety guardrail structure according to claim 1, characterized in that: the outer panel of the guardrail is a double-layer board formed by gluing an aluminum plate and a carbon fiber plate. 6. A highway safety guardrail structure according to claim 5, characterized in that: the inner panel of the guardrail is a single-layer plate made of aluminum alloy material, and the shape is wavy. 7. A highway safety guardrail structure according to claim 6, characterized in that: the layered energy-absorbing cells are made of aluminum. 8. A highway safety fence structure according to claim 6, characterized in that: one of the hierarchical energy-absorbing spherical cells is composed of three hemispheres of different sizes, and the arrangement is embedded in the diameter side of a large hemisphere Two small hemispheres, the diameter sides of the two small hemispheres continue to be embedded with two smaller hemispheres, wherein the diameter of the hemisphere is twice that of the embedded small hemisphere.