A highway buffer fence

Abstract

The application relates to a highway buffer guardrail, which relates to the technical field of highways and comprises a stand column, one side of the stand column is provided with an energy absorption box, a guardrail plate is installed on the energy absorption box, an upper convex part and a lower convex part are formed between the guardrail plate and the energy absorption box, a buffer material is filled between the upper convex part and the lower convex part, a rotating shaft is installed between the upper convex part and the lower convex part, and a collision guide wheel is rotationally connected to the rotating shaft. The upper and lower convex structures filled with the buffer material, the collision guide wheel connected with the rotating shaft and a temperature control system are arranged, the problems of insufficient energy absorption of the traditional guardrail and invalidation of the buffer material in a low-temperature environment are solved, and the buffer performance is improved, different climate conditions are adapted to, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of highway technology, specifically to a highway buffer guardrail. Background Technology

[0002] Existing highway guardrails generally use a bent steel plate structure, which has a significantly insufficient energy absorption effect. Traditional guardrails achieve a buffer function by bending the steel plate in the middle to create a raised area, but the interior of this raised area is usually a cavity design, which cannot provide sufficient energy absorption capacity. In vehicle collisions, this type of guardrail is difficult to effectively mitigate the impact force, and its protection effect on vehicles and occupants is limited.

[0003] While existing technologies improve cushioning performance by filling raised areas of guardrails with cushioning materials, such as the triangular prism box filling scheme shown in Chinese patent CN223373642U, this design has serious drawbacks in cold climates. In low-temperature environments, the properties of the filling cushioning materials change as the temperature drops: non-Newtonian fluid materials lose their fluidity and become too rigid; granular materials easily lose their cushioning properties due to freezing. These temperature-induced changes in material properties significantly reduce the energy absorption effect of the guardrail, failing to provide the necessary protection in winter traffic accidents.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0005] The purpose of this utility model is to solve the problems mentioned in the background art above, and then to propose a highway buffer guardrail.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A highway buffer guardrail includes a post with an energy-absorbing box on one side. A guardrail panel is installed on the energy-absorbing box. An upper protrusion and a lower protrusion are formed between the guardrail panel and the energy-absorbing box. A buffer material is filled between the upper protrusion and the lower protrusion. A rotating shaft is installed between the upper protrusion and the lower protrusion, and an impact guide wheel is rotatably connected to the rotating shaft.

[0007] Furthermore, the upper and lower protrusions are equipped with heating units and temperature sensors, the energy absorption box is equipped with a control unit and a battery, and the column is equipped with a bracket on the side away from the energy absorption box. A photovoltaic module is installed on the bracket, and the photovoltaic module is connected to the control unit.

[0008] Furthermore, the heating element is a flexible electrothermal film, which is uniformly attached to the inner walls of the upper and lower protrusions.

[0009] Furthermore, the column is provided with a base at its bottom, and the base is fixedly connected to the ground by expansion bolts.

[0010] Furthermore, the guardrail panel includes a single plate, which is bent to form a back plate, an upper protrusion and a lower protrusion. An upper pivot hole is formed at the bottom of the upper protrusion, and a lower pivot hole is formed at the top of the lower protrusion.

[0011] Furthermore, a rotating shaft is inserted into the upper rotating shaft hole and the lower rotating shaft hole.

[0012] Furthermore, a folded portion is formed at the junction of the back plate and the upper protrusion, and the folded portion forms the top of the guardrail and is fixedly connected to the energy-absorbing box by bolts.

[0013] Furthermore, the left end of the entire panel is joined together with the right end of the entire panel to form the bottom of the guardrail and is fixedly connected to the energy-absorbing box with bolts.

[0014] As can be seen from the above, this application solves the problems of insufficient energy absorption and failure of buffer material in low-temperature environments of traditional guardrails by setting up an upper and lower raised structure filled with buffer material, an impact guide wheel connected by a rotating shaft, and a temperature control system. It has the advantages of improving buffer performance, adapting to different climate conditions, and extending service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; In the diagram: 1. Base, 2. Column, 3. Bracket, 4. Photovoltaic module, 5. Energy absorption box, 6. Guardrail, 61. Back panel, 62. Upper protrusion, 621. Upper pivot hole, 63. Lower protrusion, 631. Lower pivot hole, 64. Folding part, 65. Left end of the whole panel, 66. Right end of the whole panel, 7. Pivot, 8. Impact guide wheel, 9. Buffer material. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In existing technologies, highway guardrails generally employ a bent steel plate structure, whose energy absorption effect is limited by the material's deformation capacity. Some improvements enhance cushioning performance by filling raised areas with buffer materials; however, in cold regions, low temperatures can cause these materials to freeze and harden, losing their original properties. For example, non-Newtonian fluids lose fluidity at low temperatures, and sandy materials lose their looseness when frozen, resulting in the guardrail's inability to effectively absorb collision energy, posing a safety hazard. To address these issues, researchers noticed the critical impact of temperature changes on the performance of buffer materials and began exploring ways to maintain their functionality in low-temperature environments. After repeated experiments, they discovered that an active temperature control mechanism could effectively solve the material freezing problem. By integrating a temperature sensor and heating element with a photovoltaic power supply system, they developed an adaptive temperature maintenance solution. A highway buffer guardrail includes a post 2, an energy-absorbing box 5 on one side of the post, a guardrail panel 6 mounted on the energy-absorbing box, an upper protrusion 62 and a lower protrusion 63 formed between the guardrail panel and the energy-absorbing box, a buffer material 9 filled between the upper and lower protrusions, a rotating shaft 7 installed between the upper and lower protrusions, an impact guide wheel 8 rotatably connected to the rotating shaft, a heating unit and a temperature sensor inside the upper and lower protrusions, a control unit and a battery inside the energy-absorbing box, a bracket 3 on the side of the post away from the energy-absorbing box, a photovoltaic module 4 mounted on the bracket, and a control unit connected to the photovoltaic module.

[0018] The heating unit refers to a device used to regulate the temperature of the buffer material. Specifically, it can be a flexible electrothermal film attached to the inner wall of the protrusion to ensure uniform heat conduction to the material's interior. The temperature sensor is an element that monitors the material's temperature in real time; for example, a digital temperature probe embedded in the protrusion cavity can be used to feed data back to the control unit. The control unit is a logic module that initiates heating based on a preset temperature threshold; for example, a microprocessor can compare sensor data with material characteristic parameters to trigger a heating command. The photovoltaic module is a device that converts solar energy into electrical energy; for example, monocrystalline silicon solar panels are tilted and mounted on a support to provide a continuous power supply to the system. Specifically, when the ambient temperature drops to a preset critical value, the temperature sensor transmits a signal to the control unit, which then activates the heating film to heat the cushioning material. During heating, the heating film is evenly distributed on the inner wall of the raised section to prevent localized overheating or uneven heating. Photovoltaic modules collect solar energy during the day and store it in batteries to ensure continuous power supply at night or in cloudy / rainy weather. Impact guide wheels are connected to the raised section via a shaft, guiding the deformation direction of the guardrail during a vehicle collision, working in conjunction with the cushioning material at its optimal temperature to absorb impact energy. Compared to existing technologies, current guardrails rely solely on material filling to improve cushioning performance, neglecting the impact of temperature changes on material properties. This solution addresses the issue of material performance degradation in low-temperature environments by embedding temperature monitoring and active heating devices. Furthermore, the use of a photovoltaic power supply system avoids the difficulties of external power wiring, enhancing the system's applicability in remote areas. Through the above technical solutions, this application ensures that the buffer material maintains its optimal working condition under different ambient temperatures, effectively preventing the hardening of non-Newtonian fluids or the freezing of sandy materials, and significantly improving the energy absorption capacity of the guardrail in cold regions. The combination of photovoltaic power supply and battery storage achieves energy self-sufficiency and reduces maintenance frequency. The wireless transmission function of temperature data supports remote monitoring, facilitating timely detection of abnormal conditions and maintenance intervention.

[0019] Furthermore, the column is provided with a base 1 at its bottom, and the base is fixedly connected to the ground by expansion bolts.

[0020] The base refers to the foundational support structure that bears the column. It can be implemented using steel plates or precast concrete blocks with anchor holes, serving to distribute the load transmitted by the column and enhance the overall structural stability. The expansion bolt refers to a ground anchor with an expansion sleeve. It can be implemented using chemical anchors or mechanical expansion bolts. After drilling, the bolt is embedded into the ground substrate, and torque is applied to expand the sleeve, forming a reliable ground connection. In at least one embodiment, the guardrail panel includes a single panel, which is bent to form a back panel 61, an upper protrusion 62, and a lower protrusion 63. An upper pivot hole 621 is formed at the bottom of the upper protrusion, and a lower pivot hole 631 is formed at the top of the lower protrusion.

[0021] The integral bending of the sheet metal refers to the formation of an integrated structure of the back plate and the protrusion by continuously bending the sheet metal. This can be achieved using a cold rolling and stamping process, which improves the overall structural strength and reduces weld seams. The upper and lower pivot holes are through holes located at the bottom of the upper protrusion and the top of the lower protrusion, respectively. These can be manufactured using a stamping process. This design ensures the concentricity of the pivot installation and provides stable rotational support for the impact guide wheel. Specifically, the guardrail panel is formed by continuously bending a single sheet of material to create a back panel, an upper protrusion, and a lower protrusion. The back panel serves as the fixing surface for connecting the energy-absorbing box, and the space between the upper and lower protrusions forms a space to accommodate cushioning material. The upper and lower pivot holes are machined using a stamping process to insert pivots and install impact guide wheels. Thus, the one-piece molding structure avoids the strength loss caused by splicing multiple parts, while the positional accuracy of the pivot holes ensures the stability of the guide wheels during rotation. Furthermore, a rotating shaft 7 is inserted into the upper rotating shaft hole and the lower rotating shaft hole.

[0022] Specifically, an upper pivot hole is formed at the bottom of the upper protrusion by stamping, and a corresponding lower pivot hole is machined at the top of the lower protrusion. Both ends of the pivot are inserted into these two holes respectively. A clearance fit or transition fit is used between the pivot and the holes to ensure that the impact guide wheel can rotate freely around the pivot axis when impacted by a vehicle. The axes of the upper and lower pivot holes coincide, ensuring that the pivot remains horizontal after installation and preventing the guide wheel from jamming due to axis misalignment. Furthermore, a folded portion 64 is formed at the junction of the back plate and the upper protrusion. The folded portion forms the top of the guardrail panel and is fixedly connected to the energy-absorbing box with bolts. The folded portion refers to a transition structure formed at the junction of the back plate and the upper protrusion through a bending process, which can be achieved using a stamping process.

[0023] Furthermore, the left end 65 and the right end 66 of the whole panel are joined together to form the bottom of the guardrail and are fixedly connected to the energy-absorbing box with bolts. The joining of the left and right ends of the whole panel means that the two ends of the panel are joined together by mechanical interlocking, which can be achieved by mortise and tenon joint or lap welding process.

Claims

1. A highway buffer guardrail, characterized in that, It includes a column, an energy-absorbing box on one side of the column, a guardrail plate installed on the energy-absorbing box, an upper protrusion and a lower protrusion formed between the guardrail plate and the energy-absorbing box, a cushioning material filled between the upper protrusion and the lower protrusion, a rotating shaft installed between the upper protrusion and the lower protrusion, and an impact guide wheel rotatably connected to the rotating shaft.

2. The highway buffer guardrail according to claim 1, characterized in that, Heating units and temperature sensors are installed inside the upper and lower protrusions. A control unit and a battery are installed inside the energy absorption box. A bracket is installed on the side of the column away from the energy absorption box. A photovoltaic module is installed on the bracket. The photovoltaic module is connected to the control unit.

3. The highway buffer guardrail according to claim 2, characterized in that, The heating unit is a flexible electric heating film, which is evenly attached to the inner walls of the upper and lower protrusions.

4. The highway buffer guardrail according to claim 1, characterized in that, The column has a base at its bottom, and the base is fixed to the ground by expansion bolts.

5. The highway buffer guardrail according to claim 1, characterized in that, The guardrail panel includes a single panel, which is bent to form a back panel, an upper protrusion and a lower protrusion. An upper pivot hole is formed at the bottom of the upper protrusion, and a lower pivot hole is formed at the top of the lower protrusion.

6. The highway buffer guardrail according to claim 5, characterized in that, A rotating shaft is inserted into the upper rotating shaft hole and the lower rotating shaft hole.

7. The highway buffer guardrail according to claim 5, characterized in that, A fold is formed at the junction of the back plate and the upper protrusion. The fold forms the top of the guardrail and is fixedly connected to the energy-absorbing box by bolts.

8. The highway buffer guardrail according to claim 5, characterized in that, The left end of the whole plate is joined together with the right end of the whole plate to form the bottom of the guardrail and is fixedly connected to the energy absorption box by bolts.

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