Speed bump is installed on the road to make after the vehicle deceleration of traffic facilities, general for strip shape, also has a point, material is mainly rubber, also has is metal, general with black and white to yellow visual attention.
Speed bumps that road hog to accomplish vehicle deceleration, slightly general Settings in the highway crossing, industrial and mining enterprises, schools, residential area entrance need vehicles slow down road sections and easy to cause traffic accident, is used to a new type of traffic speed reduction motor vehicles, non-motor vehicles dedicated security Settings.The deceleration zone greatly reduces the occurrence of accidents at major traffic crossings and is a new special facility for traffic safety.The car is safe and ACTS as a buffer to reduce the speed, so as to improve the safety of traffic crossings.
The rubber deceleration belt is designed according to the Angle principle of the tire and the special rubber on the ground during the vehicle running. It is made of special rubber.It is a new type of traffic safety setting which is set at the entrance of road crossings, industrial and mining enterprises, schools, residential areas and other entrances for the speed reduction of motor vehicles and non-motor vehicles.This product compared with the original cement ridge, steel pipe, rubber speed bump shock resistance, excellent pressure resistance, long service life, less wear and tear, the car less noise, yellow and black, the color is clear, do not need to paint again a year, beautiful and easy, etc.After the use of the deceleration belt product, the accident at all major traffic crossings is greatly reduced. It is a new special facility for traffic safety.National roads and highways are not suitable for installation.
Until 1997 only foreign companies were producing and selling rubber speed bumps, complete with reflective beads.Abroad, it has a special name: "lying cop," which means the car will slow down as if it were a cop.At that time, the main domestic use of cement and cast iron as deceleration belt.Rubber deceleration with a certain degree of softness, in the vehicle impact without a strong sense of turbulence, shock absorption, good effect.See black and yellow alternate in the day, see at night glance bead reflex light, especially striking.Simple installation and easy maintenance.Later, many rubber manufacturers across the country imitated this style.
There is a small hole in the center of each side of the speed reducer, which is an installation hole. The speed reducer is fixed to the road surface with an expansion screw.Therefore, when the vehicle rolling speed reducer, the most stressed place is the installation hole, the first part of the tear is also the connection hole, so the deceleration slope falls off and the steel nail is exposed.Steel spikes sticking out of the road can puncture wheel tires.The main factor causing this situation is to cut corners on production, and the strength of materials is greatly reduced by adding a large number of low-cost additives with recycled rubber.To avoid this problem, use natural rubber, not recycled rubber.Do not add a large number of low - cost additives.Connect the hole with the inner steel plate and connect with each other.When vulcanized rubber products processing, inside the speed bumps with a steel plate, connect the two holes respectively, screw when installed through the steel plate, the number of the increased connection strength, leave a big hole on steel plate, make the combination of steel and rubber is better.Added meridian for strength.
Rubber speed bump testing equipment, to simulate the wheel rolling, observe the damage of rubber speed bump, fix the rubber speed bump on the tablet, open the motor, wheel rotation, recompacted rubber speed bump, to test its life.
The weight of 20 t of biaxial automotive with a speed of 40 km/h has been on the road fixed, the rubber deceleration ridge after test, visual inspection sample, after test rubber deceleration ridge should not have any damage, cracking phenomenon.
Folding physical properties
Elongation at break
The elongation rate of rubber deceleration ridge surface material should not be less than 200%, and the elongation rate of rubber deceleration ridge surface material used in highway and city roads should not be less than 250%.
The tensile strength
The tensile strength of rubber retarded ridge surface materials should be no less than 6.0mpa, and the tensile strength of rubber retarded ridge surface materials used on roads and urban roads should be no less than 8.5mpa
Shore A hardness
The shor A hardness of the rubber retardant ridge surface material should be within the range of 65-85.
The tearing strength of the material on the surface of rubber reduction ridge should be no less than 20 kN/m
The abrasion loss of rubber retardant ridge surface materials should be no more than 0.8cm3/1.61km.
The impact elasticity of the material on the surface of the rubber reduction ridge should not be less than 20%
The retrograde property of the rubber deceleration ridge unit to the vehicle driving direction should not be lower than the requirement in table 1.
After various climatic and environmental tests, the rubber retarded ridge should be free from discoloration, crack, peeling and warping, and its elongation and tensile strength should still meet the requirements of 3.
After the rubber reduction ridge is wiped by no. 93 gasoline, there should be no obvious signs of dissolution and destruction.
After rubber reduction ridge no. 0 diesel oil is wiped, there should be no obvious signs of dissolution and destruction.
After the rubber retardant ridge is wiped by SAE 5w-30 lubricating oil, there should be no obvious signs of dissolution or damage.
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