GAS LEAKAGE PREVENTION DEVICE AND PRESSURE GOVERNOR

• Main Authors: OHORI HITOSHI, IIDA SHOGEN
• Format: Patent
• Language: English; Japanese
• Published: 30.06.2016
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; CONTROLLING; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PHYSICS; REGULATING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

PROBLEM TO BE SOLVED: To prevent a gas leakage in a simple structure without inviting the deterioration of the function of a pressure governor.SOLUTION: A gas leakage prevention device includes: a cylindrical main body 20a; a valve seat 22 provided in the main body 20a; a valve body 23 abutting to the valve seat 22 from one end side A1 of an axial direction A and capable of blocking the flow of a fluid in the inner part of the main body; and a spring 24 for energizing the valve body 23 to the other side A2 of the axial direction A. The main body 20a is fixed to an air hole so as to apply the outside pressure to a diaphragm from the other end side A2 to one end side A1. When there is no possibility for the gas leakage, a sum of the gravity force of the valve body 23 and the elastic force of the spring 24 is directed at least to one end side A1 in a state that the valve body 23 abuts against the valve seat 22, and when there occurs a possibility of the gas leakage, the sum of the gravity force of the valve body 23, the elastic force of the spring 24, and the pressure applied to the valve body 23 due to the gas leakage is at least directed to the other end side A2 in a state that the valve body 23 abuts against the valve seat 22.SELECTED DRAWING: Figure 2 【課題】整圧器の機能低下を招くことなく簡易な構造でガス漏れを防止する。【解決手段】筒状の本体２０ａと、本体２０ａの内部に設けられた弁座２２と、当該弁座２２に対して軸方向Ａの一端側Ａ１から当接し、本体の内部における流体の流通を遮断可能となるように設けられた弁体２３と、弁体２３を軸方向Ａの他端側Ａ２に付勢するスプリング２４とを備え、本体２０ａが、他端側Ａ２から一端側Ａ１に向かってダイヤフラムに外気圧をかけるように空気孔に固定され、ガス漏れの可能性がない場合に、弁体２３が弁座２２に当接した状態において、弁体２３の重力とスプリング２４の弾性力との和が、少なくとも一端側Ａ１に向かい、ガス漏れの可能性が生じた際に、弁体２３が弁座２２に当接した状態において、弁体２３の重力とスプリング２４の弾性力とガス漏れによりかかる弁体２３への圧力との和が、少なくとも他端側Ａ２に向かうように構成される。【選択図】図２