MECHANISM OF MAINTENANCE OF THE DOME OF THE REACTOR DEPARTMENT OF THE NUCLEAR POWER PLANT

摘要

The utility model belongs to the field of mechanical engineering, namely to hoisting and transport engineering and can be used to service equipment located on the inner surface of the dome of the reactor compartment of the nuclear power plant and the transportation of goods in restricted areas during construction and installation and repair of equipment during the operation of the nuclear power plants with a stopped and muffled reactor.;The technical result with the use of the utility model is simplification of the design, enhancement of the ergonomic capabilities of personnel in servicing the equipment of the nuclear power plant reactor dome, safety of work, and reduction of the maintenance procedure.;The mechanism for servicing the dome of the reactor compartment of the nuclear power plant consists of a pivot, bridge, maintenance pads. And the mechanism for servicing the rotary support with the axes installed in it, on which the ends of the bridge beams rest, is attached to the upper site of the reactor compartment. The bridge rests on the end beam by means of a flange connection and consists of straight-run linear beams of box section connected by pipes. The end beam is supported by two non-driven drive wheels, in front of which scrapers are installed at the ends of the end beam, preventing foreign objects from falling under the wheels. The straightness of the beams, when designing the device, allows to extend and shorten the total length of the dome maintenance mechanism for any position of the support rail, change the number of service areas, which is caused by changes in both the amount of equipment installed on the inside of the reactor compartment dome and the dimensions of individual equipment units. To prevent the oil from leaking to the equipment located below the dome maintenance mechanism, all gearmotor gear motors are equipped with pallets. The bridge is equipped with maintenance platforms. On the lower platform there is a fixed lifting mechanism. On the middle platform there is a cantilever-rotary lifting mechanism. All the lifts ensure the verticality of the trajectory of the suspension. Electrical equipment is installed on the upper platform. If necessary, electrical equipment (control equipment) can be taken out of the reactor compartment. The mechanisms are controlled from three stationary pushbuttons located on the platforms of the dome maintenance mechanism. In accordance with safety requirements, simultaneous control from several consoles is excluded.