摘要:
Each of seal projections 7, 8 is positioned radially outward of an inner periphery 1a, 2a of abutting end face of each of joint members 7, 8 and has in section a contour which comprises a circular-arc portion 7b, 8b extending radially outward from the abutting end face, and a straight portion 7a, 8a extending from the circular-arc portion 7b, 8b. The circular-arc portion 7b, 8b has a center positioned radially inward of the point of intersection of the circular-arc portion 7b, 8b and the straight portion 7a, 8a. The straight portion 7a, 8a is inclined at 30 to 60 degrees with respect to the direction of axis of the joint member.
摘要:
The invention relates to a fluid control valve which controls a fluid moving through a valve body (121) by means of opening and closing a portion between a valve seat (112) and a valve holder (126) using a drive unit (28), wherein:
said drive unit (28) comprises a rod shaped shaft (108) for applying pressure via said valve holder (126) and a valve rod (109), and a member a (104) which is affixed around said rod shaped shaft (108), said member a (104) comprises a magnetic material, and a coil (102) having a space between it and the shaft and provided at a position parallel to said shaft (108) moves said member a (104) upwardly and downwardly by electromagnetic induction, and using the force of a spring (115), thereby opening and closing the portion between said valve seat (112) and said valve holder (126), and a means is provided for adjusting a gap G between said coil (102) and said member a (104).
摘要:
The invention relates to a fluid control valve which controls a fluid moving through a valve body (121) by means of opening and closing a portion between a valve seat (112) and a valve holder (126) using a drive unit (28), wherein: said drive unit (28) comprises a rod shaped shaft (108) for applying pressure via said valve holder (126) and a valve rod (109), and a member a (104) which is affixed around said rod shaped shaft (108), said member a (104) comprises a magnetic material, and a coil (102) having a space between it and the shaft and provided at a position parallel to said shaft (108) moves said member a (104) upwardly and downwardly by electromagnetic induction, and using the force of a spring (115), thereby opening and closing the portion between said valve seat (112) and said valve holder (126), and a means is provided for adjusting a gap G between said coil (102) and said member a (104).
摘要:
The invention relates to a fluid control valve which controls a fluid moving through a valve body (121) by means of opening and closing a portion between a valve seat (112) and a valve holder (126) using a drive unit (28), wherein:
said drive unit (28) comprises a rod shaped shaft (108) for applying pressure via said valve holder (126) and a valve rod (109), and a member a (104) which is affixed around said rod shaped shaft (108), said member a (104) comprises a magnetic material, and a coil (102) having a space between it and the shaft and provided at a position parallel to said shaft moves said member a (104) upwardly and downwardly by electromagnetic induction, and using the force of a spring (115), thereby opening and closing the portion between said valve seat (112) and said valve holder (126), and an exciting current supplied to said coil (102) is supplied in a divided manner as a large initial drive current up to the point of valve opening, and a small maintenance current for maintaining the opened state of the valve after the valve is opened.
摘要:
The invention relates to a fluid control valve which controls a fluid moving through a valve body by means of opening and closing a portion between a valve seat and a valve holder using a drive unit, wherein:
said drive unit comprises a rod shaped shaft for applying pressure via said valve seat and a valve rod, and a member a which is affixed around said rod shaped shaft, said member a comprises a magnetic material, and
a coil having a space between it and the shaft and provided at a position parallel to said shaft moves said member a upwardly and downwardly by electromagnetic induction, and using the force of a spring, as well, the portion between said valve seat and said valve holder is opened and closed, and after an exciting current supplied to said coil is cut off, an exciting current is resupplied to said coil for a brief period after a passage of a short time t.