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1. 发明专利

JPH03148099A HANDLING DEVICE OF RECIRCULATION PUMP IN NUCLEAR REACTOR INTERNAL PUMP 失效
公开(公告)号：JPH03148099A
公开(公告)日：1991-06-24
申请号：JP28733589
申请日：1989-11-06
申请人： TOSHIBA CORP
发明人： KOGASAWA YUTAKA , KOMIDA HIDEO , USU MASAJI , ENDO TAKIO , YAMAMOTO TETSUZO , TAKAHASHI HIDEAKI , SAITO NOBORU
IPC分类号： G21C15/243
摘要： PURPOSE:To suppress vibration being generated during attaching and detaching work of constituent parts and to intend improvement of safety of periodical inspection works by providing a weight at a lower part of a supporting part and by making gravity center of whole the constituent parts, the supporting part and the weight, correspond to a position of the supporting part. CONSTITUTION:A motor 7 as a constituent part of a recirculation pump in a nuclear reactor (an internal pump) is placed on the upper part of a supporting part 27 and, at the lower part of the supporting part 27, a weight 35 is provided as a part of the supporting part 27. The weight 35 has such weight as the gravity center G of whole the motor 7, the supporting part 27 and the weight 35, may correspond to a position of the gravity center of the supporting part 27. The supporting part 27 climbs up and down a motor case 6 along a screwed bar 23 when the screwed bar 23 is rotated by a motor 25 of a screwed bar driving part. In this situation, the gravity center G of whole the motor 7, the supporting part 27 and the weight 35, corresponds almost to the position of the supporting part 27 and therefore the supporting part 27 climbs up and down very stably and vibration of the motor 7 and the supporting part 27 can be substantially suppressed.

2. 发明专利

JPH0458197A ELEVATION DEVICE FOR PUMP HANDLING MACHINE 失效
公开(公告)号：JPH0458197A
公开(公告)日：1992-02-25
申请号：JP16665890
申请日：1990-06-27
申请人： TOSHIBA CORP
发明人： USU MASAJI , KOGASAWA YUTAKA
IPC分类号： G21C15/243 , G21C19/02
摘要： PURPOSE:To improve the safety of a pump handling machine at the time of elevating operation by forming trapezoid screws as guide screws. CONSTITUTION:Elevation nuts 35 which has rectangular screws 34 are screwed in the guide screws 32 and 33. Thus, the guide screws 32 and 33 are formed of the trapezoid screws, so the friction between the guide screws 32 and 33 and elevation nuts 35 become large and then a motor part 17 and respective handling tools never fall naturally by self-lock effect even when stopping during elevation owing to a fault of a driving motor. Further, gears 36 reverse the guide screws 32 and 33, which absorb mutual vibrations. Consequently, the vibrations of the guide screws 32 and 33 in the elevation of the pump handling machine 37 are reducible and the safety is improved.

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