PROBLEM TO BE SOLVED: To provide a dust-removing device for a sprinkler, capable of easily removing dust accumulated in the inside of connecting piping of the sprinkler to facilitate the maintenance and management of the sprinkler.SOLUTION: The dust-removing device for the sprinkler includes a cylindrical body part 21 installed in the stand-up part 13 of a water-feed pipe connected to the sprinkler 30, and a filter member 27 installed in the upstream side from an ejecting opening 31a of a nozzle part 31 of the sprinkler 30. A water-feeding passage 24 penetrating the inside of the body part 21 in the upper and lower direction is formed, and a valve chamber 26 having a spherical valve element 25 stored and arranged therein is formed in the midway of the water-feeding passage 24. The spherical valve element 25 floats up by the addition of an upward water pressure from the water-feeding pipe to open the water-feeding passage 24, and the entrance 26a of the valve chamber 26 is closed by the sinking down of the spherical valve element 25. A water-draining opening 28 penetrating the side part of the body part 21 from the valve chamber 26 to the exterior is formed in the side part of the body part 21 to allow the entrance of the water-draining opening 28 to be closed by the spherical valve element 25 by receiving the water pressure in the inside of the body part 21 in a water-feeding state of the water-feeding passage 24.COPYRIGHT: (C)2010,JPO&INPIT【課題】スプリンクラーの接続配管内部に溜まるゴミを容易に外部に除去することができ、スプリンクラーの維持管理を容易とするスプリンクラー用ゴミ除去装置を提供する。【解決手段】スプリンクラー30に接続される給水管の立ち上がり部13に設けられる筒状の本体部21と、スプリンクラー30のノズル部31の吐出口31aよりも上流側に設けられるフィルタ部材27とを有し、本体部21の内部に上下に貫通する給水通路24を設け、給水通路24の途中に、球状弁体25を収納配置した弁室26を設け、給水管からの上向きの水圧の付加により球状弁体25が浮上して給水通路24を開通し、同水圧の除去により球状弁体25が沈降して弁室26の入口26aを閉鎖し、本体部21の側部に、弁室26から外部に貫通する水抜き口28を設け、給水通路24の給水状態において、本体部21の内部の水圧を受けた球状弁体25により、水抜き口28の入口を閉鎖する。【選択図】図3
