| 摘要 |
PROBLEM TO BE SOLVED: To produce a uniformly distributed conical spray pattern by forming a liquid flow channel, a vane chamber, and a spiral chamber from the upstream side toward the downstream side in a nozzle main body and installing a vane which gives spiral turbulent movement to a liquid flow in the vane chamber. SOLUTION: The nozzle main body 11 of a spray nozzle assembly 10 is composed of an external casing 22 and an orifice insert 24 forming an ejection opening 20, a fluid supply line 12a is connected to the screw-cut neck 12 of the casing 22, and a hexagonal head 13 is connected to the downstream end on the opposite side. A whirl chamber 18 is made to communicate with a vane chamber 15 communicating with the suction channel 14 of the main body 11 through a conical base inlet part 16, and the whirl chamber 18 is made to communicate with the opening 20 through a conical base part 21. In order to give spiral movement and turbulent flow movement of liquid passing from an inlet 14 to the whirl chamber 18, a vane 30 having a pair of spiral channels 31a, 31b is housed freely expandably/contractably in the vane chamber 15.
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