Patent DE-102011113171-A1 (DE)
Title: Apparatus, useful for continuous casting of steel by round- or square cross-sections, comprises segments with a roller guide and water cooling for a strand, where the segments are equipped with cantilever-housings in a swing execution
Inventor: FIGGE DIETER
IPC: B22D11/041
Filed: 2011-09-12
Abstract: The apparatus comprises segments with a roller guide and water cooling for a strand, where the segments are equipped with cantilever-housings in a swing execution. Support rollers of the cantilever-housing are changed in an angular position for changing, where the change is made manually using a handling unit that is suspended in a crane hook. A transport work is performed by the crane. A first operation of the handling unit for roller changes is provided for soldering or clamping an axial support of the support roller on the housing shaft. The apparatus comprises segments with a roller guide and water cooling for a strand, where the segments are equipped with cantilever-housings in a swing execution. Support rollers of the cantilever-housing are changed in an angular position for changing, where the change is made manually using a handling unit that is suspended in a crane hook. A transport work is performed by the crane. A first operation of the handling unit for roller changes is provided for soldering or clamping an axial support of the support roller on the housing shaft, which is preformed manually using a central quick release fastener nut. A torque transmission between the support roller and the housing shaft takes place by a spline connection. An involute tooth profile has conically sharpened tooth surfaces on the housing shaft. Multi-start screw thread is designed with a large pitch so that 0.5-1 nut-revolution for the axial clamping is sufficient. A second operation of the handling unit is provided for grasping and removing the support roller from the housing shaft. The handling unit has grab bolts (19), which perform an axial movement by cylinder, where a proper contriving of a second bolt takes place into holes of the support roller via a mechanic. The mechanic at an end of the contriving process of two slit parentheses is secured at the grab bolts so that the support roller taken off from the housing shaft with the axial movement of the bolts and then the crane make the transport of the handling unit. Second handling heads are combined with axles horizontally displaced to each other into a swivel unit transportable by the crane. The swivel unit: is operated by a worker; and consists of a housing with a bearing shaft mounted in anti-friction, a horizontal axis, and a face plate that is secured on the second heads. Each head receives the support roller. A special motor pivot drive is used for moving a unit. An eyebolt sits, at the housing, above into the center of gravity and makes a connection to the crane hook. A weight of the housing hanging in the crane with the second handling heads with its inertia forms a counter moment when a motor rotates around the horizontal axis. The swivel unit with the second handling heads having the vertical axis is used for the same operating principle to change the support rollers with the vertical axis. Energy for operating mechanical functions is supplied by an electric cable, which connects the mechanic at the respective place of work with a power supply, before it commences with change work. A pivot of rocker housing for the strand guide is accomplished into an alternate position by hydraulic employment cylinders in roller guide units of the segments. The support roller of the roller guide units is successively changed in the segment without disassembly. The segment in the workshop on 3-position-whips is stressed on a chip board. A first roller guide unit is raised on the lefthand side with a first position of the rocker for the roller change. A middle second position of the rocker is suitable for the change of a second roller guide unit. A third roller guide unit is raised on the righthand side with a third position of the rocker for the roller change. One of the roller guide units is accomplished by different wedges that are manually mounted. The horizontal handling unit is equipped with a counter weight displaceable and wedgable by hand. A standard telelader is used in the special equipment for changing the support roller in the workshop instead of a hangar crane with which a vertical displacement takes place via a hydraulic movable joists with a rectangular profile in a vertical guide. The joist carries at a lower end of a change unit and possesses at an upper end of an energy supply chain with which electrical, hydraulic or pneumatic drives of the change unit are provided. All functions are manually controlled to the change the support rollers over an operation pendulum by the mechanic. A roller assembly for the strand guide and a rocker arrangement are protected with which a fixed bottom roller forms a fixed side. A second rocker is supported to a side guide in pivot points, which lie above a strand midpoint of the largest strand cross-section. A radius of the rocker is made so that a horizontal distance from the strand midpoint to the pivot point is kept in a range of 100-150% of the largest strand cross-section. Different strand cross-sections of the side guide are realized within an angle of 120[deg] , and thus a turning of the rockers is possible in a change position with a horizontal shaft axis of a rocker housing.