To provide a sprinkling nozzle which has excellent practicability, being capable of preventing wasteful sprinkling, a possible cause of high costs, and reducing the risk of freezing of the road surface by leaked water by preventing leakage of water.
The nozzle has the first valve portion 8 communicating with a water-supplying pipe 6 and opened or closed with the first opening and closing valve and a sprinkling hole 9 communicating with the first valve portion 8 arranged in the upper part of the nozzle and embedded so that the sprinkling hole 9 is exposed to the road surface. A control space 1 is formed between the first valve section 8 and the water-supplying pipe 6: the downstream side of the control space 1 communicates with the first valve portion 8, and the upstream side communicates with the water-supplying pipe 6 through the second valve portion 2 opened or closed with the second opening and closing valve. The second valve is structured so as to open the second valve portion 2 when a specified water pressure is applied to its upstream side.
WO/1996/001152 | IMPROVED ANTI-CLOGGING ATOMIZER NOZZLE |
JPH0670845 | [Name of invention] Fountain nozzle device |
JPS59112857 | [Title of the device] A folding device of printed matter |
Masae Yoshii