| 摘要 |
PCT No. PCT/DK83/00113 Sec. 371 Date Aug. 3, 1984 Sec. 102(e) Date Aug. 3, 1984 PCT Filed Dec. 6, 1983 PCT Pub. No. WO84/02280 PCT Pub. Date Jun. 21, 1984.The body (1) of the sprinkler unit and the valve body (2) are formed with three cooperating shoulders (14,15) in the flow passage (6,8) to accommodate a seal (3) which, in the working state, serves both as a locking ring for the valve body (2) and to partly elastically absorb changes in the length of a rupturable valve caused by variations in the ambient temperature, while an O-ring (4) between the valve body (2) and the bulb (5) absorbs the remaining tensions. A third upstream shoulder (12) formed on the valve body (2) entrains the sealing element (3) when inserting the bulb (5) and the valve body (2) through the flow passage (6, 8). The sealing elements (3) then automatically slides in an axially enlarged annular groove (7) provided in the outer surface of the valve body (2), to the downstream shoulder (14) of the groove (7) into a locking tight-fit position between the cooperating shoulders (14, 15 ) during the subsequent obligatory pressure test of the unit, and it is ejected automatically together with the bulb upon activation for a sprinkling operation.
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