Water spray system and water spray system for water spray

摘要

The present invention relates to a sprinkling device for sprinkling water on a road surface 1 to be tested for measuring a coefficient of sliding friction of a tire. In the past, water was sprayed by water pressure through a hole in a pipe. The apparatus is provided with a sprinkling device 3 on a main pipe 2 buried in the ground of the road surface 1 and an access groove 4 for allowing the sprinkler device 3 to go on and off the road surface 1, The water spraying device 3 is provided with a constant clearance so that the water spraying device 3 can rise above the road surface 1 by the water pressure and the water spraying device 3 can be easily recovered when the supply of water is stopped. A tension spring 5 is installed and a time stopwatch is attached to the control box 6 so that water can be supplied at regular intervals.