| 摘要 |
FIELD: construction engineering. ^ SUBSTANCE: invention relates to tower cranes with slewing circle. According to invention, crane is furnished with mounting holder installed for movement on tower and designed for sectional increase of tower in height. Mounting-jib-crane with wire rope for lifting tower sections is installed in upper part of tower. Jib-lifting pulley block is connected with head and is furnished with device to lock its movable casing relative to fixed casing. Load winch of crane is connected with wire rope of jib-crane when lifting tower sections to increase height of tower and it is connected with wire rope of jib lifting pulley-block when lifting jib in working position. Slewing circle is provided with turntable for section of tower to be mounted. Center of mounting turntable is located on vertical line passing through wire rope of jib crane. Crane cabin fastening means are arranged at different levels of tower. ^ EFFECT: possibility of mounting crane sections without use of external mounting cranes and mounting of cabin at different levels. ^ 3 cl, 3 dwg |
