PRESSURE REDUCING VALVE

PROBLEM TO BE SOLVED: To provide a pressure reducing valve capable of suppressing abnormal noise generated by turbulence by suppressing generation itself of the turbulence.SOLUTION: A valve element 12 of the pressure reducing valve includes a one-stage taper portion 23 seated on an inner periphery o...

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Main Authors SHIMA TOSHIHIKO, KUBO TOSHIKATSU, KONDO MASAAKI, HAYASHI EIJI, IWAGUCHI TAKASHI, OKAWACHI EIJI, FUJIWARA EIJU, AZEYANAGI MUNETOSHI, YAMASHITA AKIRA
Format Patent
LanguageEnglish
Japanese
Published 19.05.2016
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
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Summary:PROBLEM TO BE SOLVED: To provide a pressure reducing valve capable of suppressing abnormal noise generated by turbulence by suppressing generation itself of the turbulence.SOLUTION: A valve element 12 of the pressure reducing valve includes a one-stage taper portion 23 seated on an inner periphery of a valve hole 31. On the inner periphery of the valve hole 31, a first area 33, a second area 34 and a third area 35 are formed in order from an upstream side in a flow direction a fluid. The first area 33 is formed so that, when the valve is open, height of a passage defined between the first area 33 and the one-stage taper portion 23 of the valve element 12 gradually decreases toward a downstream side in the flow direction. The second area 34 is formed so that the height of the passage is constant when the valve is open, and the entire second area 34 is in contact with the one-stage taper portion 23 when the valve is closed. The third area 35 is formed so that, when the valve is open, the height of the passage gradually increases toward the downstream side in the flow direction.SELECTED DRAWING: Figure 4 【課題】乱流の発生自体を抑制して、乱流による異音の発生を抑制することができる減圧弁を提供する。【解決手段】減圧弁の弁体１２は、弁孔３１の内周面に着座する一段テーパ部２３を有する。弁孔３１の内周面には、第１領域３３、第２領域３４、第３領域３５が前記流体の流通方向の上流側から順に形成されている。第１領域３３は、開弁時に、弁体１２の一段テーパ部２３との間の流路高さが流通方向の下流側に向かうほど漸減するように形成されている。第２領域３４は、開弁時に流路高さが一定であるとともに閉弁時にはその全領域が前記一段テーパ部に当接するように形成されている。また、第３領域３５は、開弁時に、流路高さが流通方向の下流側に向かうほど漸増するように形成されている。【選択図】図４
Bibliography:Application Number: JP20140218497