HAULAGE LOCK Russian patent published in 2002 - IPC

FIELD: nuclear power engineering; construction of nuclear power plants. SUBSTANCE: haulage lock installed during power plant construction in reactor containments for relative displacement due to temperature and other expansion provisions ensuring tight coverage of containment openings during haulage of heavy and large-size pieces of equipment has housing 1 whose flanges 6 are provided with openings. Each opening has sealing sheet 7 with hold- down mechanisms. Transfer drawer 8 installed opposite each sealing sheet moves over guides for engagement with sheet. Sheets and transfer drawers are provided with sheet moving and locking members. Each member is made of wheels 16 and 17 secured in pairs on sheet and wheels 23 fixed on transfer drawer. Wheels are disposed opposite to guides for engaging them. One wheel 15 of pair secured on sheet 7 is mounted on horizontal guide 18 provided on housing flange 6. Other wheel 17 of pair is placed level with guide 19 with tilted surface 20 which is secured on transfer drawer 8. Each pair of wheels 23 is mounted on common axle on transfer drawer 8 opposite to L-shaped brackets 21 disposed on sheet 7; it is connected to wheel turning drive 25 and sheet displacement drive 22. Lock is provided with flexible link attached to external shell 3 and to lock support joined with counterweight in its center to form angle α. Packing gland is placed over perimeter of lock opening. Walkway is provided inside lock. Proposed design provides for haulage of heavy and large pieces of equipment between two adjacent reactor containments due to load sharing between these containments and reducing these loads to permissible level. EFFECT: enlarged functional capabilities; enhanced safety of containments and lock; improved tightness of opening. 10 dwg