EXPANDABLE FLEXIBLE JOINT STRUCTURE AND SEISMIC REPAIR VALVE

• Main Authors: HASHIOKA YOSHIO, KAWASAKI KOICHI, KURETAKE KENJI
• Format: Patent
• Language: English; Japanese
• Published: 19.11.2020
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

To provide an expandable flexible joint structure that can exhibit expandable flexibility in a case of an earthquake to prevent damage of a fire hydrant or an air valve, and can be returned to an original position using water pressure of a pipe conduit, such that it can be used continuously even after expandable flexibility.SOLUTION: An expandable flexible joint structure comprises: an insertion port 61 provided in a piping machine material; a push ring 41 fitted into the insertion port via a flexible space S; a receiving port member 42; a locking protrusion part 70 formed on the insertion port side or the push ring side; a spacer 50 held by the push ring or the insertion port; and a rubber ring 51 for maintaining sealability between the inner peripheral surface of the receiving port member and the outer peripheral surface of the insertion port. In normal time, the locking protrusion part is held in a locked state by the spacer, and when the insertion port side is tilted at the time of expandable flexibility, the insertion port can be returned to an original position by water pressure from below the insertion port side in a state in which a holding state due to the locking of the locking protrusion part on the tilted side of the insertion port to the spacer is released and the insertion port is tilted.SELECTED DRAWING: Figure 1 【課題】地震発生時には伸縮可撓性を発揮して消火栓や空気弁の損傷を防ぎ、管路の水圧を利用して旧位に復帰することにより、伸縮可撓後にも継続して使用できる伸縮可撓継手構造と耐震補修弁を提供する。【解決手段】配管機材に設けられた挿し口６１と、挿し口に可撓スペースＳを介して嵌められた押輪４１と、受け口部材４２と、挿し口側或は押輪側に形成された係止突条部７０と、押輪或は挿し口に保持されたスペーサ５０と、受け口部材の内周面と挿し口の外周面との間にシール性を保持するためのゴム輪５１とを備え、平常時において、係止突条部がスペーサに係止状態で保持され、伸縮可撓時において挿し口側が傾倒した際、この挿し口の傾倒側の係止突条部のスペーサへの係止による保持状態が解除されて傾倒した状態で、挿し口側の下方からの水圧により挿し口が旧位に復帰可能とした。【選択図】 図１