| 摘要 |
Procedure in the press section of a paper machine for changing a felt (20). The normal run of said felt (20) passes in a substantial part in spaces (K) under the floor level (T-T) of the paper machine hall. In said press section its lower roll (12) is rotatably carried in support by one or several cantilevered beams (30). In the procedure the frame inserts (38) carrying one end of said cantilevered beam (30) are first removed and then lifting means (33, 33') provided in conjunction with said cantilevered beam (30) is used to lift the guide roll or guide rolls (15, 17) coming to lie within the loop of the felt to be changed and located in the underside space (K), into an upper position (15, 15') to be adjacent to the cantilevered beam (30). After that the loop (50) of the new felt is spread out to the configuration implied by the rolls coming to lie therewithin, in which shape the felt loop (50) is pushed, using special equipment (40, 41, 42, 43, 44, 45, 46, 47), to encircle the rolls (12, 13, 14, 15 and 17) coming to lie inside the loop and around said cantilevered beam (30) through the space vacated by said removed inserts (38). Then the rolls (15', 17') lifted into the upper position are lowered with their lifting means (33, 33') into their operating position in the underside space (K), whereupon said frame inserts (38) are closed. |
