JPH0380169U

JPH0380169U -

Info

Publication number: JPH0380169U
Application number: JP14086389U
Authority: JP
Priority date: 1989-12-04
Filing date: 1989-12-04
Publication date: 1991-08-16
Also published as: JPH0454381Y2

Description

[Brief explanation of the drawing]

第１図は従前の大気圧式バキユームブレーカー
の縦断側面図、第２図は同上を密閉回路に用いた
場合の説明図、第３図は本考案による大気圧式バ
キユームブレーカーの縦断側面図、第４図は同上
の密閉回路に組込んだ状態の説明図、第５図は同
上の別の実施例の縦断側面図である。図面符号の説明、Ａ……大気圧式バキユームブ
レーカー、Ｂ……浴槽、ａ……逆止弁、ｂ……開
放弁、ｃ……真空破壊弁、ｈ１……給湯用の熱交
換器、ｈ２……追焚き用の熱交換器、ｗ……一次
側、ｙ……二次側、Ｐ……循環ポンプ、Ｓ……水
量センサ、Ｖ……逆止弁、ＳＶ……電磁弁、ＳＷ
……フロースイツチ、Ｈ……高さ、１……配管、
２……配管、３……弁箱、３ａ……筒状部、３０
，３１……連通口、３２……開放口、３２ａ……
口壁、３４，３５……弁座、３６……連通孔、３
７，３８……弁軸、４０……支点軸、４１，４２
……アーム、４３……ウエイト、５……ベンチユ
リー管、５０……追焚き用の回路、５１……給湯
用の回路、５２……排水口、５３……パイプ、５
４……ニツプル、５５……キヤツプ、６０……管
壁、６１……吸気孔、６２……排水管。 Fig. 1 is a longitudinal side view of a conventional atmospheric pressure type vacuum breaker, Fig. 2 is an explanatory diagram when the same as above is used in a closed circuit, and Fig. 3 is a longitudinal side view of an atmospheric pressure type vacuum breaker according to the present invention. , FIG. 4 is an explanatory diagram of a state in which it is incorporated into the same sealed circuit, and FIG. 5 is a longitudinal sectional side view of another embodiment of the same. Explanation of drawing symbols, A... Atmospheric vacuum breaker, B... Bathtub, a... Check valve, b... Release valve, c... Vacuum breaker valve, h1... Heat exchanger for hot water supply, h2...Heat exchanger for reheating, w...Primary side, y...Secondary side, P...Circulation pump, S...Water flow sensor, V...Check valve, SV...Solenoid valve, SW
...Flow switch, H...Height, 1...Piping,
2...Piping, 3...Valve box, 3a...Cylindrical part, 30
, 31... Communication port, 32... Opening port, 32a...
Mouth wall, 34, 35... Valve seat, 36... Communication hole, 3
7, 38... Valve shaft, 40... Fulcrum shaft, 41, 42
...Arm, 43...Weight, 5...Benture pipe, 50...Circuit for reheating, 51...Circuit for hot water supply, 52...Drain port, 53...Pipe, 5
4...Nipple, 55...Cap, 60...Pipe wall, 61...Intake hole, 62...Drain pipe.

Claims

[Scope of claim for utility model registration] Communication port 30 communicating with piping 1 on primary side w
and a valve box 3 provided with a communication port 31 that communicates with the piping 2 on the secondary side y and an opening port 32 that opens to the atmosphere.
Inside, there is a check valve a that opens and closes the valve by moving up and down relative to the valve seat 34 provided in the communication port 30, and a check valve a that opens and opens the valve by moving up and down relative to the valve seat 35 provided in the opening port 32.・The open valve b that performs the valve closing operation is connected to the fulcrum shaft 4.
The check valve a is supported by arms 41 and 42 that rotate symmetrically around zero center, and is installed so that when one valve is opened, the other valve is closed, and due to the difference in weight, the open valve b opens in the normal state and the check valve a. is regulated to close, and the valve seat 34 facing the check valve a is formed at a higher position than the valve seat 35 facing the open valve b,
An atmospheric pressure type vacuum breaker characterized in that a cylindrical part 3a rising higher than the opening surface of the opening 32 is installed below the check valve a that abuts against the valve seat 34. A communication hole 36 that communicates with the atmosphere is provided in a portion of the cylindrical portion 3a near the top of the cylindrical wall, and the communication hole 36
The atmospheric pressure type vacuum breaker according to claim 1, further comprising a vacuum breaker valve (c) which is opened by negative pressure generated within the cylindrical portion (3a). The atmospheric pressure type vacuum breaker according to claim 1, wherein a drain port 52 is provided at a portion of the mouth wall 32a of the opening port 32 located above the valve seat 35.