| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a connection coupling of a sprinkler head for preventing the generation of dead water without lowering water pressure. <P>SOLUTION: A pressure fluctuation is generated in clean water of a clean water chamber 38 communicating with clean water in a water feeding pipe 14 when pressure fluctuation is generated in the clean water of the water feeding pipe 14. A bellows tubular elastic member 70 expands and contracts the volume of the clean water chamber 38 fluctuates when pressure fluctuation is generated in the clean water of the clean water chamber 38. The clean water coming into the clean water chamber 38 is agitated along with the clean water flowing through a body tube section 30 and the dead water in which the clean water stagnates for a long period in the connection coupling 16 is not generated, when the volume of the clean water chamber 38 fluctuates. Thus, the generation of the dead water can be prevented without lowering the water pressure in the connection coupling 16 by expanding and contracting the elastic member 70. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
