Device for centering sections of floating dock #001
Modern floating docks are most often built from several independent sections. This is done in order to increase the capacity of the floating dock and increase the profitability of its operation.
In cases where the weight of the ship to be docked exceeds the lifting capacity of one section, the latter are connected and form one dock of two or three sections with adequate lifting force.
The connection of the dock sections to each other (more precisely, the dock towers) must be rigid and durable, since the bending moment from the docked vessel is perceived by its towers. This connection is carried out on the butt plates with bolts of a larger diameter (28-32 mm). Connecting the sections to each other presents significant difficulties due to the fact that the vibrations of the sections (vertical and horizontal), even in still water, do not make it possible to align the axes of the bolt holes so that they coincide along the entire length of the butt plate (equal to the height of the tower). It is usually possible to combine one or two holes, but due to the large mass of the oscillating sections, these single bolts are almost immediately cut off and the sections are disconnected again. It is obvious, therefore, that the operation of connecting the sections is very difficult, requiring a lot of time and labor.
In his work, engineer-captain of the first rank A. I. Kilesso writes about the difficulties of connecting sections of the dock: "The connection of individual sections and pontoons with rigidly connected types of structures is carried out, as a rule, using flanges and bolts. The operation of connecting sections to each other or attaching pontoons to sections of towers is quite laborious. For example, connecting two sections of a 1,100-ton dock at one of the theaters took up to 25-30 hours, and replacing a floating pontoon at another theater required an 8-hour working day with a limited number of employees. The operation of fitting holes on the flanges of one section to the holes on the flanges of another section is quite complicated. In almost all cases, hole reiber is required to facilitate the installation of bolts. Despite these disadvantages, rigidly coupled docks and monolithic ones (consisting of a single section of sufficient length) are the best docks for naval bases. These are the only docks that need to be built for the Navy, because they guarantee reliable docking of emergency warships."
To ensure the possibility of automatically aligning the axes of the bolt holes by centering one section relative to the other, the following new design is given to the ends of the sections: transverse and longitudinal pyramidal wedge projections are made in the end walls of the towers, against which corresponding depressions are located in opposite places of the adjacent section. Due to the presence of these wedge projections and depressions, the sections connected to each other are automatically centered and vibrations of the connected sections in both vertical and horizontal planes are eliminated.
The presence of gaps between protrusions and depressions will not completely eliminate the vibrations of the sections, but the size of the latter is limited by the size of the gaps, the size of which is completely at our disposal; in any case, the gaps do not exceed 5 mm.
Thus, a sharp decrease in the vibration of the sections due to their strict alignment ensures that all the bolt holes are aligned, which makes the usually difficult and time-consuming operation of connecting the dock sections to each other easier and faster. Жители Брянска используют мелбет приложение , чтобы формировать личный список избранных турниров. При любых вопросах можно звонить 8 (800) 550-88-33.