Design of Hydraulic Gates by Paulo C.F. Erbisti

By Paulo C.F. Erbisti

Revised and up to date, this moment version of layout of Hydraulic Gates continues an identical target because the unique: for use as a textbook and a guide of layout of gates, providing the most facets of layout, manufacture, set up and operation of hydraulic gates, whereas introducing new items, applied sciences and calculation systems. This version incorporated new chapters on consumption gates and trashrack layout, highlighting the facets of protection, operational and upkeep approaches. to enhance the energy opposed to structural failure of consumption trashracks, the writer proposes a sequence of inflexible calculation assumptions, layout parameters and production techniques, with the intention to definitely bring about more secure trashracks. a few 340 drawings and images, eighty two tables, 107 references and 23 labored examples support the reader to appreciate the elemental thoughts and calculation tools awarded.

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The height and quantity of stoplog panels are influenced by: • • • the lifting capacity of the crane or gantry crane; gantry crane height – the higher the panel, the greater the lifting height above the operating deck; difficulty of storing high panels; 26 Design of hydraulic gates, 2nd edition • transportation limits of the access ways to the site – the maximum normal width of parts to be conveyed by highway or railway is 3 m. In highways, if such limit is exceeded, a special transportation license is required, as well as for the use of forerunners, which increases transportation costs.

Vertical framing is used only in wide gates with low height. Leaves are provided with seals on the sides, center and the sill. 39 shows the free end of one of the leaves of the Bariri lock gate, with a music note rubber seal and the center metal stops. Double-action horizontal hydraulic cylinders, attached to the leaf top girder operate most miter gates. The connection between the stem and the leaf is made near the hinge axis, in order to reduce the cylinder length. In normal conditions, the hydraulic cylinder exerts little force to move the gate for it is enough to overcome the friction forces.

38 Angle between gate leaf and lock wall. 7 degrees [3]. Miter gates are framed either horizontally or vertically. In the first case, which is the most usual arrangement, the entire water load is transmitted through the girders and bearings to the concrete walls. For vertical framing, part of the water load is carried by the top gate girder and transmitted to the wall and the other part is carried directly to the gate sill. Vertical framing is used only in wide gates with low height. Leaves are provided with seals on the sides, center and the sill.

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