| 摘要 |
<p>Apparatus (10) for enabling a sprinkler head assembly (12) to be detachably mounted on an irrigation system riser pipe (14) containing water under pressure in accessed relation to the water under pressure within the riser pipe. The apparatus comprises an access assembly (16) adapted to be rigidly secured to the riser pipe and an accessing assembly (18) adapted to be rigidly secured to the sprinkler head assembly. The access assembly include separate main and pilot pressure valve mechanisms (48 and 122) containing the water under pressure within the riser pipe. Both assemblies include detachable interengaging connectors (138 and 140) for establishing a mechanical connection between the two assemblies by a simple and convenient manual movement. The accessing assembly includes a quick connection fitting (136) for accessing the water under pressure through the pilot pressure valve mechanism which is mounted in a cooperating quick connection fitting. The accessing assembly includes an operating mechanism (156) movable in response to the communication of pilot water under pressure therewith to open the main valve mechanism and provide water pressure rigidification to the mechanical connection between the two assemblies.</p> |
