VALVE PACKING

To downsize in a direction along a surface of a packing body portion.SOLUTION: An inflow side packing 71 is arranged between a valve body that has a valve body portion rotating in a storage portion of a housing, of a rotary valve, and a plane portion 34 that faces the storage portion and has a plura...

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Bibliographic Details
Main Authors KUROKAWA MASAHISA, SHINODA KAZUKI
Format Patent
LanguageEnglish
Japanese
Published 13.12.2021
Subjects
BLASTING
CYLINDERS
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
PISTONS
SEALINGS
THERMAL INSULATION IN GENERAL
WEAPONS
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Summary:To downsize in a direction along a surface of a packing body portion.SOLUTION: An inflow side packing 71 is arranged between a valve body that has a valve body portion rotating in a storage portion of a housing, of a rotary valve, and a plane portion 34 that faces the storage portion and has a plurality of inflow ports 42 and 44 of fluid as opening portion. A packing body portion 72 of the inflow side packing 71 has through-holes 73a, 73b, and 73c penetrating the packing body portion in a thickness direction thereof. The packing body portion 72 is equipped with annular first seal portions 74a, 74b, and 74c that are provided around the respective through-holes 73a, 73b, and 73c and contact with the plane portion 34, and an annular second seal portions that are provided around the respective through-holes 73a, 73b, and 73c and contact with the valve body portion. A part in the circumferential direction of the first seal portion 74a and a part in the circumferential direction of the adjacent first seal portions 74b and 74c overlap with each other, and a part in the circumferential direction of the second seal portion and a part in the circumferential direction of the adjacent second seal portions overlap with each other.SELECTED DRAWING: Figure 12 【課題】パッキン本体部の面に沿う方向における小型化を図る。【解決手段】流入側パッキン７１は、ロータリバルブのうち、ハウジングの収容部内で回動する弁本体部を有する弁体と、収容部に面し、かつ流体の複数の流入口４２，４４を開口部として有する平面部３４との間に配置される。流入側パッキン７１のパッキン本体部７２は、その厚み方向に貫通する貫通孔７３ａ，７３ｂ，７３ｃを有する。パッキン本体部７２は、各貫通孔７３ａ，７３ｂ，７３ｃの周囲に設けられて平面部３４に接触する環状の第１シール部７４ａ，７４ｂ，７４ｃと、各貫通孔７３ａ，７３ｂ，７３ｃの周囲に設けられて弁本体部に接触する環状の第２シール部とを備える。第１シール部７４ａの周方向における一部と、隣の第１シール部７４ｂ，７４ｃの周方向における一部とが重複し、第２シール部の周方向における一部と、隣の第２シール部の周方向における一部とが重複している。【選択図】図１２
Bibliography:Application Number: JP20200092039