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21. 发明专利

JP2003151412A VACUUM VALVE 审中-公开
公开(公告)号：JP2003151412A
公开(公告)日：2003-05-23
申请号：JP2001350077
申请日：2001-11-15
申请人： MITSUBISHI ELECTRIC CORP
发明人： OCHI SATOSHI , SUGA NORIO
IPC分类号： H01H33/66
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive vacuum valve of high performance, and by making electrode surfaces contact stably regardless of misalignment of an axis of a movable side electrode rod and reducing rise and variation of a contact resistance. SOLUTION: The whole surface of the electrode face 22a of the movable side electrode rod 22 is formed to be a convex face consisting of an outer surface of the spherical face with the radius of curvature R1 . The whole surface of the electrode surface 21a of the fixed side electrode rod 21 is formed to be a concave face consisting of an inner surface of the spherical face with the radius of curvature R2 . The radius of curvature R1 is equal to the radius of curvature R2 and the centers of the radius of curvature R1 and the radius of curvature R2 are positioned on an extended line of the axis of the fixed side electrode rod 5.

22. 发明专利

JP2002319341A VACUUM VALVE 失效
公开(公告)号：JP2002319341A
公开(公告)日：2002-10-31
申请号：JP2001121196
申请日：2001-04-19
申请人： MITSUBISHI ELECTRIC CORP
发明人： INAGAKI KOICHI , SUGA NORIO , HARADA TAKAKAZU
IPC分类号： H01H33/66 , H01H1/66 , H01H3/00 , H01H33/664
摘要： PROBLEM TO BE SOLVED: To economically provide a vacuum valve capable of cutting off a large current, and having excellent performance such as small fusion breaking force, stable and low contact resistance and small electrode consumption. SOLUTION: This vacuum valve is provided, in a vacuum vessel having its inside closed by a fixed-side end plate 2 and a movable-side end plate 3 respectively attached to both ends of a tubular insulation cylinder 1, with: a fixed-side electrode rod 4 fixed to the end plate 2 with a fixed-side electrode 7 formed at an end; a movable-side electrode rod 5 provided with a movable-side electrode 8 capable of contacting to and separating from the electrode 7 formed at an end; and an electrode-side shield 9 fixed to the insulation cylinder 1 and surrounding the electrode 7 and the electrode 8 for preventing the inside wall surface of the insulation cylinder 1 from being polluted by metal vapor generated from the electrode 7 and the electrode 8 in cutting off the current. A recessed part 8a is formed only on either the central part of the contact surface of the electrode 7 or that of the electrode 8.

23. 发明专利

JP2002208335A VACUUM BULB CONTACT POINT AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JP2002208335A
公开(公告)日：2002-07-26
申请号：JP2001000505
申请日：2001-01-05
申请人： MITSUBISHI ELECTRIC CORP
发明人： ITO TAKEFUMI , MURAKAMI SHOJI , SUGA NORIO , HARADA TAKAKAZU , INAGAKI KOICHI , KOYAMA KENICHI
IPC分类号： C22C29/08 , B22F7/00 , C22C1/05 , H01H1/02 , H01H1/021 , H01H1/023 , H01H33/66
摘要： PROBLEM TO BE SOLVED: To provide a vacuum bulb contact point that has excellent break property and also superior cutting property and a manufacturing method for obtaining this contact point. SOLUTION: This is a vacuum bulb contact point comprised of substantially Ag, WC and Co, and the quantity of Ag at the surface layer part of the contact point is fewer by 5-30% than the inside and the quantity of Co at the surface layer part of the contact point is fewer by 5-30% than the inside, and the inside of the contact point is made of Ag of 25-40 wt.%, Co of 0.05-30 wt.% and WC for the rest, and the average particle size of Co is 0.1-10 μm and the average particle size of WC is 0.1-8 μm. The manufacturing method is comprised of a first process of obtaining Ag-WC-Co alloy, and a second process of impressing discharge in vacuum on the Ag-WC-Co alloy obtained in the first process.

24. 发明专利

JP2001035326A VACUUM SWITCH 失效
公开(公告)号：JP2001035326A
公开(公告)日：2001-02-09
申请号：JP20889699
申请日：1999-07-23
申请人： MITSUBISHI ELECTRIC CORP
发明人： SEKIYA TAKU , SUGA NORIO , HISAMORI YOICHI
IPC分类号： H01H33/66
摘要： PROBLEM TO BE SOLVED: To improve reliability by jointing the sidewall part of sealing metal fittings formed of austenite stainless steel and an insulating cylinder by blazing, and setting the minimum radius of curvature in a fillet surface of solder generated in a jointing part which is not less than a specific ratio of thickness of the sidewall part. SOLUTION: A minimum radius of curvature R of a fillet surface generated in a jointing part is set to 80% or higher of the thickness of a sidewall part. Both sealing metal fittings 2 and 3 use austenite stailess steel, and an insulating cylinder 1 and the sealing metal fittings 2, 3 are blazed in vacuum. A quantity of silver solder sandwiched in the jointing part at blazing is adjusted, the minimum radius of curvature R of a fillet part surface is changed and is adjusted, so that the minimum radius of curvature R becomes 80% or higher of a thickness of the sealing metal fitting sidewall part in a blazing part, and plastic deformation is caused in both a fillet part and the sealing metal fitting sidewall part in a solidifying process of a blazing material, to avoid the occurrence of cracks in the fillet part.

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