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Pacific Security Network News ]
This article introduces the specification of urban road speed reducer. The traffic facilities installed on the road to decelerate the passing vehicles are generally strip-shaped and somewhat shaped. The materials are mainly rubber and metal. Generally, they are yellow. Black phase to cause visual attention, so that the road surface is slightly arched to achieve the purpose of vehicle deceleration, generally set at road crossings, industrial and mining enterprises, schools, residential community entrances and other sections that require vehicles to slow down and road sections that are prone to traffic accidents. A new type of traffic-specific safety setting for speed reduction of motor vehicles and non-motor vehicles. The deceleration belt greatly reduces the accidents at all traffic crossings and is a new special facility for traffic safety. The car is safe and plays the role of buffer deceleration while driving, improving the safety of the intersection.
In the past, in very few sections of the city, some people set the speed bumps at will. Such speed bumps have too much resistance to the vehicles, which seriously affects the traffic of vehicles.
The rubber deceleration ridge is composed of a yellow and black rubber deceleration ridge unit. The rubber deceleration ridge should be integrally formed, and the outer surface should have stripes that increase the adhesion. Each deceleration ridge unit should have a retroreflective material for nighttime identification of the direction of travel of the vehicle. The surface shall be free of pores, shall not have obvious scratches and lack of material, and the color shall be uniform and uniform without flash. The surface of the rubber deceleration ridge should be pressed out of the name of the production unit. If the bolt is connected to the ground, the bolt hole should be a counterbore. The units of the deceleration ridge should be connected in a reliable manner.
The width and height sections of the deceleration ridge unit should be approximately trapezoidal or curved. The width should be in the range of (300 mm ± 5 mm) ~ (400 mm ± 5 mm) and the height should be in the range of (25 mm ± 2 mm) - (70 mm ± 2 mm) on roads and urban roads. The ratio of the rubber deceleration ridge height to the width dimension used above should not exceed 0.7.
Urban road speed reducer specification
Pressure resistance
A two-axle car with a weight of 20 t passes through a rubber deceleration ridge that has been fixed on the road at a speed of 40 km/h. After the test, the sample is inspected visually. After the test, the rubber deceleration ridge should be free from any damage or cracking.
Physical properties
Elongation at break
The elongation at break of the rubber deceleration ridge surface material shall be not less than 200%, and the elongation at break of the rubber deceleration ridge surface material used on roads and urban roads shall be not less than 250%.
Tensile Strength
The tensile strength of the rubber deceleration ridge surface material shall not be less than 6.0 MPa, and the tensile strength of the surface of the rubber deceleration ridge used on roads and urban roads shall not be less than 8.5 MPa.
Shore A hardness
The Shore A hardness of the rubber deceleration ridge surface material should be in the range of 65-85.
Tear strength
The tear strength of the rubber deceleration ridge surface material should not be less than 20 kN/m
Wear reduction
The wear reduction of rubber deceleration ridge surface material should be no more than 0.8 cm3/1.61 km.
Impact elasticity
The impact elasticity of the rubber deceleration ridge surface material shall not be less than 20%
Retroreflective performance
The retroreflective performance of the rubber deceleration ridge unit in the direction of travel of the vehicle shall not be lower than the requirements specified in Table 1.
Adaptability
After being subjected to various climatic environment tests, the rubber deceleration ridge shall be free of discoloration, cracks, spalling, warping, etc., and its elongation at break and tensile strength shall still meet the requirements of 3.
Solubility resistance
After the rubber deceleration ridge is wiped by the 93rd gasoline, there should be no obvious signs of dissolution and destruction.
After the rubber deceleration ridge is wiped by No. 0 diesel, there should be no obvious signs of dissolution and destruction.
After the rubber deceleration ridge is wiped by SAE 5W-30 lubricating oil, there should be no obvious signs of dissolution and damage.
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