Induced nuclear reactions: processes – systems – and elements – Handling of fission reactor component structure within...
Patent
1990-03-05
1991-10-29
Hunt, Brooks H.
Induced nuclear reactions: processes, systems, and elements
Handling of fission reactor component structure within...
G21C 1910
Patent
active
050614320
ABSTRACT:
Service apparatus is provided for a large inverted canned motor pump installed above a floor and beneath a large steam generator in a fossil or nuclear power plant with limited access space and with limited access time at least in the case of nuclear power plants. The canned motor pump has a pump casing and a depending motor having a flange secured to a pump casing flange by a plurality of tensioned studs with tightened nuts.
The service apparatus includes a maintenance cart having a height greater than the height of the motor casing beneath the motor flange and further having a generally U-shaped frame with an open vertical side that permits the cart to be moved horizontally such that the cart frame can be moved under the pump casing to surround the depending motor.
Three electromechanical actuators are supported by the cart frame and each has a downwardly extending translating arm engageable with respective motor lugs near the bottom of the motor. The translating arms are operated to support, raise and lower the motor with its axis vertical or at an incline to the vertical. The motor is supported on top of the cart frame prior to raising the motor to its installed position and after the motor has been released from its installed position and lowered to the cart.
A work platform is provided on top of the cart by a plate welded to the top of the framework platform and a removable platform section extending across the open side of the frame. A personnel platform is provided on the cart art an elevation below the work platform. The personnel platform includes a swing down section on the bight cart side, two fixed sections on the two leg sides of the cart and a removable section on the open cart side. Rollers are provided on the bottom of the cart frame to facilitate horizontal cart movement along the floor.
REFERENCES:
patent: Re33373 (1990-10-01), Gallo et al.
patent: 3941259 (1976-03-01), Hoffmeister et al.
patent: 4696786 (1987-09-01), Frizot et al.
patent: 4847038 (1989-07-01), Martin
patent: 4873760 (1989-10-01), Watanabe et al.
patent: 4973433 (1990-11-01), Larson et al.
Hunt Brooks H.
Voss Frederick H.
Westinghouse Electric Corp.
LandOfFree
Apparatus for facilitating the servicing of inverted canned pump does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for facilitating the servicing of inverted canned pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for facilitating the servicing of inverted canned pump will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1398850