JPH01168075U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の断面正面図、第２図は従来使
用されている空気弁の断面正面図、第３図は本考
案の好適に使用されるダムの説明図である。 ３７Ｂ……吸気主形空気弁、１……弁箱、２…
…弁座板、４……ボンネツト、５……弁棒、６…
…弁体、６ａ……フロート弁体、６ｂ……主弁体
、７……スプリング、９……案内室、１０……弁
座、１１……貫通孔、１２……案内棒、１３……
ガイド。 FIG. 1 is a cross-sectional front view of the present invention, FIG. 2 is a cross-sectional front view of a conventionally used air valve, and FIG. 3 is an explanatory diagram of a dam preferably used in the present invention. 37B...Intake main air valve, 1...Valve box, 2...
...Valve seat plate, 4...Bonnet, 5...Valve stem, 6...
...Valve body, 6a... Float valve body, 6b... Main valve body, 7... Spring, 9... Guide chamber, 10... Valve seat, 11... Through hole, 12... Guide rod, 13...
guide.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 弁箱上に弁座板を介して開口を有するボンネツ
トを取着し、該ボンネツトの中央を貫通して前記
弁箱内に弁棒を挿入し、該弁棒の下端にフロート
等の弁体を取着し、該弁体の浮力と前記弁棒の上
方に捲装されたスプリングにより前記弁体を前記
弁座板に密着するまで排気作用を行い、前記スプ
リングの付勢力に抗して前記弁箱内の負圧により
前記弁体と前記弁座板の密着を解除し弁体を開い
て吸気作用を行う空気弁において、前記弁体を開
口面積の小さなフロート弁体と開口面積の大きな
主弁体の二重構造とし、前記フロート弁体を主弁
体の下部の案内室に設け、該案内室に排気時フロ
ート弁体を作動させるべく水の流入口と、主弁体
に貫通した貫通孔よりボンネツトの開口に空気を
逃すべく空気孔とを設けると共に、前記スプリン
グのバネ常数を吸気時ボンネツトの開口から空気
を流入させるべく弁箱内の負圧により始めて主弁
体と弁座板の密着を解除させ主弁体を開放するよ
うに設定したことを特徴とする吸気主形空気弁。 A bonnet having an opening is mounted on the valve box through the valve seat plate, a valve stem is inserted into the valve box through the center of the bonnet, and a valve body such as a float is attached to the lower end of the valve stem. The buoyant force of the valve body and the spring wound above the valve stem perform an exhaust action until the valve body is brought into close contact with the valve seat plate, and the valve is moved against the biasing force of the spring. In an air valve that releases the close contact between the valve body and the valve seat plate due to negative pressure in the box and opens the valve body to perform an intake action, the valve body is divided into a float valve body with a small opening area and a main valve with a large opening area. The float valve body is provided in a guide chamber below the main valve body, and the guide chamber has an inlet for water to operate the float valve body during exhaust, and a through hole penetrating the main valve body. An air hole is provided in the opening of the bonnet to allow air to escape, and the spring constant of the spring is adjusted so that the main valve body and the valve seat plate come into close contact with each other due to the negative pressure inside the valve box in order to allow air to flow in through the opening of the bonnet during intake. An intake main type air valve characterized by being set to release the main valve body and open the main valve body.