Title:
偏心回転弁
Document Type and Number:
Japanese Patent JP7132791
Kind Code:
B2
Abstract:
To provide new valve seat structure.SOLUTION: An eccentric rotary valve V1 is provided that has: a cylindrical valve cage 1 in which fluid flows; a valve stem 2 inserted into the valve cage in such a manner that an axial center a thereof is separated from an axial center c of the valve cage; a valve element 3 eccentrically disposed in the valve stem; a valve element valve seat 3a of which the axial center is inclined to the axial center of the valve cage; and a valve cage valve seat 1a orthogonal to the axial center of the valve cage from which the valve element valve seat is separated and with which the valve element valve seat contact. Seat portions 5 of the valve element valve seat and the valve cage valve seat each have elliptical spherical surfaces, or respectively have an elliptical spherical surface and an elliptical conical surface, or each have the conical spherical surfaces. Thus, an approach angle of the valve element is generated to be applied as a torque seal, and a valve closing action is stabilized. Since contact portions (seat surfaces) 5 of both valve seats 1a, 3a are kept into contact with an ellipse vertical to a valve cage axial direction to close the valve, a sufficient flow channel cross-sectional area can be obtained, and further since the valve cage 1 of a size substantially same as that of a conventional one can be used, a nominal diameter is not changed and a face-to-face distance is not changed. Thus, the eccentric rotary valve can be applied to a pipe conduit of the same nominal diameter (face-to-face dimension can be matched to standard).SELECTED DRAWING: Figure 2
Inventors:
Takashi Kuwahara
Keisuke Matsubara
Keisuke Matsubara
Application Number:
JP2018153600A
Publication Date:
September 07, 2022
Filing Date:
August 17, 2018
Export Citation:
Assignee:
Kurimoto Iron Works Co., Ltd.
International Classes:
F16K1/22
Domestic Patent References:
| JP200419784A | ||||
| JP2005344765A | ||||
| JP2017133686A | ||||
| JP2008520937A | ||||
| JP2006521524A | ||||
| JP2017203532A | ||||
| JP2007327642A | ||||
| JP2018173122A |
Foreign References:
| US4697786 | ||||
| US20180149272 |
Attorney, Agent or Firm:
Naoya Kamada
Bunji Kamata
Yaichiro Nakatani
Takayuki Tagawa
Takashi Shimizu
Bunji Kamata
Yaichiro Nakatani
Takayuki Tagawa
Takashi Shimizu
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