The way to create an ice load-carrying platform

 

(57) Abstract:

The invention relates to the field of hladotehnika and can be used when creating a platform on the ice surface, intended for traffic or storage of goods. With the aim of increasing the thickness of the load-carrying platform form the platform on the ice surface depth less than the thickness of the ice. Received the ice surface is exposed to low temperature (t < 0oC) within the time required for the formation of a build-up of ice in the place of manufacture of the trench with a thickness equal to the thickness of the ice. Formed in the ice surface is produced through hole through which the trench is filled with water. Then the icy surface is re-exposed to low temperature (t < 0oC) within the time required to freeze water. 1 Il.

The invention relates to the field of hladotehnika and can be used when creating a platform on the ice surface, intended for traffic or storage of goods.

The prior art of the claimed invention known way to create a load-carrying platform on the ice surface, zakluchalos in resistlessly traffic on the platform or to store the goods (Peschansky I. C. Lagoudera and hladotehnika. - Leningrad: Gidrometeoizdat, 1967, 461 S.).

The disadvantage of this method is the low growth rate of ice thickness.

The task of the claimed invention is to create an ice platform, ensuring safety for transport and secure storage of goods.

Technical result achieved when the task is to increase the carrying capacity of the ice surface.

This is achieved by improving the cylindrical rigidity of the ice surface due to the formation of ice trench infinite length sufficient to traffic width, with depth less than the thickness of the ice and then filled it with water.

It is known that the ice load-carrying platform is a plate, working on the curve. Cylindrical rigidity platinum D is defined by the following formula:

D = E3/12(1-2)

where E is the modulus of elasticity of ice;

- the thickness of the ice plate;

is the Poisson's ratio.

(Samuli C. I. basic theory of elasticity and plasticity. - M.: Higher school, 1982, 264 S.).

To increase the load-carrying capacity ice Pisa by increasing the thickness of the ice plate .

The essential features characterizing the invention.

Restrictive: clearing ice from snow.

Distinctive: on the ice surface is formed, the trench depth less than the thickness of the ice, after which the ice surface is exposed to low temperature (t < 0oC) within the time required for the formation of a build-up of ice in the place of manufacture of the trench thickness equal to the thickness of the ice, after which the formed ice surface is produced through holes and re-exposed to low temperature (t < 0oC) within the time required to freeze the water.

The invention is illustrated graphically (see drawing).

In ice cover 1, pre-cleared of snow, having a thickness H, is formed in the trench 2, for example, using laboratroy machine. The depth of the trench h should not exceed the ice thickness H, length of the trench is measured by the length of the ice surface. The trench is formed wide enough for traffic. Then the resulting ice surface is exposed to low temperature (t < 0oC). In most cases, this may be the natural environment in the zi is t conditions (t < 0oC) by artificial means.

By reducing the thickness of the ice on the value of h in the place of manufacture of the trench is lowering the temperature of the water. Under the influence of low temperature under the ice in the place of manufacture of the trench is formed ice build-up 3 with thickness H1=H. Then formed in the ice surface is produced through holes 4, through which the trench is filled with water, and re-exposed to low temperature (t < 0oC) within the time required to freeze water. After freezing the total thickness of the ice load-carrying platform is increased by the value of h will be equal to = Hl+h, which will increase its cylindrical stiffness D (see formula).

The method of formation of an ice load-carrying platform, which consists in cleaning the ice from snow, characterized in that the ice sheet to form a trench depth less than the thickness of the ice, after which the ice surface is exposed to low temperature (t<0C) within the time required for the formation of a build-up of ice in the place of manufacture of the trench with a thickness equal to the thickness of the ice, after which the formed ice surface vyroba is no, required to freeze water.

 

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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.

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9 cl, 11 dwg

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