A method of creating ice crossing
(57) Abstract:The invention relates to letterlike and can be used when creating ice crossings on natural ice for traffic. The ice surface is cleaned from snow. Through holes drilled in the ice cover along the terminal through the compressor periodically under the ice pumped cold air. The invention is directed to increasing the carrying capacity of the ice crossing. 1 Il. The invention relates to the field of hladotehnika and can be used when creating crossings on natural ice for traffic.The prior art known from the method of ice crossings without superstructure on natural ice, which consists in preparing a route through early clearing of the ice surface along the intended path from snow to accelerate the growth of ice (1. I. S. Peschansky. "Lagoudera and hladotehnika". - L.: Sea transport. - 1963 - 345 S.).The disadvantage of this method is insufficient bearing capacity of the ice cover that is used as a terminal, due to the low strength of the lower layers of the ice due to temperature difference is e ice because with increasing temperature the ice strength is reduced (2. Bogorodsky Centuries, Gavrilo B. N. "The Ice. The physical properties. Modern methods of glaciology". - L.: Gidrometeoizdat, 1981, 384 S.).The task of the invention is to provide a reliable ice crossing.Technical result achieved when the task is to increase the strength of the ice cover.The essential features characterizing the invention.Restrictive: scraping ice from snow.Distinctive: along the planned ice crossings ice cover are drilled hole, through which the ice periodically through the compressor pumped cold (t<0C) atmospheric air.It is known (see 2) that the temperature decrease of the ice cover increases its durable characteristics and more intensive increase of its thickness. If under the ice to pump cold (t<0C) atmospheric air, the temperature of the lower layers will decrease, which will increase the strength of the ice. In turn, the frequency of injection of air will lead to the closure (disappearance) of the air cavity under the ice and to the corresponding contact the Oia with the natural process of numerazione ice cover. Thus, the bearing capacity of the ice crossing will increase due to the increase of the strength properties of ice, and by increasing the thickness of the ice cover.The method is as follows. Ice cover protects against snow. Along the planned ice crossing drill a series of holes, which summarizes the piping connected to the compressor, which pumps under the ice cold air.The invention is illustrated graphically, where the drawing shows a diagram of the method for hardening the ice crossing.In ice cover 1 along the intended path crossing drill holes 2. These holes down the supply line 3 is connected to the compressor 4, which periodically under the ice pushes the cold (t<0C) atmospheric air. The way to create icy crossing, which consists in Stripping the ice surface from snow, characterized in that the through holes drilled in the ice cover along the terminal through the compressor periodically under the ice pumped cold (t < 0oC) atmospheric air.
SUBSTANCE: invention can be used in designing ramp and propulsion and steering gear and their hydraulic systems. Novelty in proposed water craft is that it is furnished with streamlined carrying frame for fastening devices of propulsion and steering complex installed in hull aft part and formed by two pairs of rigid longitudinal beams hinge secured by inner ends of aft sheet of hull in zone located under loading side coupled by flexible cross beams in each pair and support bar between pairs. Hydraulic heads of propulsors are hinge-mounted on outer ends of each pair of longitudinal beams, being secured on said beams to form additional cross tie between beams. Carrying frame is furnished with power hydraulic cylinders connected with hydraulic system and installed to control position of heads and loading side by turning carrying frame in aft sheet hinge joints. Body of each is provided with upper roller support, being rolling support for each hinged loading side at its opening, and lower platform being rigid base interacting with ground at resting of hinged loading side on head body in loading position of loading side. Novelty in hydraulic system of watercraft is that it is furnished, in additional to propulsor control hydraulic cylinders, with hydraulic cylinders for setting ramps, changing thrust vector, fixing loading side and locking carrying frame. Each hydraulic cylinder, including propulsor position control hydraulic cylinders, are supplied through parallel hydraulic lines connected with main line, with electric control in each line. Invention contains description of design peculiarities of each line providing required modes of operation of watercraft.
EFFECT: improved performance of watercraft and creating of hydraulic system providing required mode of operation of watercraft.
9 cl, 11 dwg