A roller-type highway guardrail

Abstract

The invention relates to the technical field of road safety, and discloses a roller-type expressway guardrail, including a column, the upper end of the column is fixedly connected with a central shaft, and the outer wall of the central shaft is movably connected with a rotating drum through a bearing. The central axis is fixedly connected with railings. The roller-type highway guardrail provides good guiding ability through rotation, and the direction of pulling the car is the same as that of the guardrail. With the rotation of the drum, the connecting rod and the suction cup extend out, sucking the body and rear of the car, reducing the forward movement of the car Speed, secondly, the guardrail absorbs energy through the friction of rotation and the shock of the fluid in the cushioning bag, the guardrail itself suffers less damage, and the energy is discharged through the rotating and guiding ability of the drum, which further reduces the chance of guardrail damage. Therefore, when out of control When the vehicle actively uses the guardrail to slow down, it can not only achieve the deceleration effect, but also prevent the driver from rushing out of the road when the steering wheel turns too large.

Description

technical field [0001] The invention relates to the technical field of road safety, in particular to a roller-type expressway guardrail. Background technique [0002] Expressways are usually semi-rigid guardrails. When a vehicle hits the guardrail, on the one hand, it can deform and absorb energy to reduce the damage to the vehicle. However, due to the fast driving of expressway vehicles and the very large kinetic energy, the effect of the guardrail is extremely limited. Either the vehicle crashes the guardrail and rushes out of the road, or rushes out in the opposite direction and hits other normal driving on the road. vehicles, causing more accidents. [0003] In order to enhance the impact resistance and energy dissipation capacity of the guardrail, a roller guardrail has appeared on the market, which enhances the guiding ability of the guardrail, and disperses the impact energy that was originally concentrated in one place to a longer distance at one end, and a single p...

AI Technical Summary

Problems solved by technology

However, due to the fast driving of expressway vehicles and the very large kinetic energy, the effect of the guardrail is extremely limited. Either the vehicle crashes the guardrail and rushes out of the road, or rushes out in the opposite direction and hits other normal driving on the road. vehicles, causing more accidents

[0003] In order to enhance the impact resistance and energy dissipation capacity of the guardrail, a roller guardrail has appeared on the market, which enhances the guiding ability of the guardrail, and disperses the impact energy that was originally concentrated in one place to a longer distance at one end. The impact strength of the guardrail is greatly reduced, which can effectively reduce the impact damage to the vehicle. However, this type of guardrail increases the impact area of ​​the out-of-control vehicle and greatly increases the probability of causing a secondary accident. At the same time, since energy conversion hardly occurs at the moment of impact, the vehicle When ejecting in the reverse direction, it still carries a large kinetic energy, which will also increase the intensity of the secondary accident

[0004] Further, on the expressway, accidents caused by brake failure occur from time to time, so an avoidance lane for braking will be set on the expressway, but because not all sections of the road will be provided with an avoidance lane, in sections without an escape lane, Stall may only be able to hit the guardrail to reduce the kinetic energy of the vehicle, but although the deceleration can be achieved by hitting the guardrail, it may also cause loss of control or destroy the guardrail

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