Title:
SPHERICAL VALVE
Document Type and Number:
Japanese Patent JP2017172755
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To improve a spherical valve provided with a liquid-tight seal part for sealing an interface part by a seal packing at an outer periphery of a valve rod, improve a reliability of seal at the liquid-tight seal part and durability of the seal packing pressurized with a packing pressing ring.SOLUTION: There are provided a valve rod 9 having its lower end side passed through a lid 4 and inserted into a valve case 2; a valve body 10 that is moved forward by the valve rod and moved to or away from a valve seat 2d formed at an inside part of a valve case 2; a handwheel 11 for applying a rotating force to the valve rod 9; and a liquid-tight seal part 13. The liquid-tight seal part 13 comprises a seal packing 13a assembled into a packing storing groove 6d formed at a lower shaft supporting part 6a of a yoke 6. A spherical valve where the valve rod 9 is screwed into a screw fitting ring 8 engaged in thread with an upper shaft supporting part 6b of the yoke 6 is made in such a way that a packing pressing ring 13b is cooperatively arranged at the lower end side of the screw fitting ring 8, and the packing pressing ring 13b and an adapter 13c cause the seal packing 13a to be pressurized in an axial direction.SELECTED DRAWING: Figure 1
Inventors:
ISOE MANABU
Application Number:
JP2016061730A
Publication Date:
September 28, 2017
Filing Date:
March 25, 2016
Export Citation:
Assignee:
KYOEI VALVE KOGYO KK
International Classes:
F16K41/04; F16K1/02
Domestic Patent References:
| JP2003269653A | 2003-09-25 | |||
| JPH07248065A | 1995-09-26 | |||
| JP2012122491A | 2012-06-28 | |||
| JP2010043692A | 2010-02-25 | |||
| JPH04258588A | 1992-09-14 | |||
| JPH04258574A | 1992-09-14 | |||
| JP2010019335A | 2010-01-28 | |||
| JP2003004165A | 2003-01-08 | |||
| JPH10169834A | 1998-06-26 | |||
| JPS54125534A | 1979-09-29 |
Foreign References:
| US20100155640A1 | 2010-06-24 |
Attorney, Agent or Firm:
Naoya Kamata
Bunji Kamada
Yaichiro Nakatani
Takayoshi Tagawa
Bunji Kamada
Yaichiro Nakatani
Takayoshi Tagawa