RU2381949C1 - Raft bundle - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: proposed raft bundle comprises limited-buoyancy timbers arranged in bottom, inner and top layers. Inner layer timbers are laid perpendicular to bottom and top layer timbers to rest, by their end faces, upon packs made up of higher-buoyancy round timbers fastened together by flexible hooping and laid parallel to limited-buoyancy timbers of bottom and top layers. Flexible inner hopping arranged horizontally serves to extreme limited-buoyancy timbers of inner layers. Flexible outer hooping embraces packs of higher-buoyancy timbers of bottom and top layers. Vertical hooping fasten inner hooping and outer hooping together. Raft bundle bottom and sides are wrapped in flexible watertight sheet with its edges furnished with strings attached thereto and furnished with coupling devices on their free ends.

EFFECT: rafting on small-depth rivers with no loss of buoyancy.

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Description

The invention relates to an alloy of wood, namely to raft units.

A raft unit is known made of round timber of limited buoyancy, which is laid in the lower, inner and upper rows, and the timber of the inner rows is laid perpendicular to the timber of the lower and upper rows and butt ends in packages consisting of round timber of increased buoyancy, combined by flexible harnesses, and stacked parallel to the timber of limited buoyancy of the lower and upper rows. The raft unit is equipped with flexible internal ties located horizontally and connecting the extreme forest products of limited buoyancy of the internal rows and flexible external strapping, covering the outside of the packages of timber of increased buoyancy and timber of limited buoyancy of the lower and upper rows, flexible internal connections and external strapping connected by vertical ties (see pat. RF №2043255 / 11, M.C. B63B 35/62, 09/10/1995, Bull. No. 25).

The disadvantages of this raft unit are: small and unstable buoyancy margin, high resistance to movement.

The problem to which the invention is directed is to increase and stabilize the buoyancy margin and decrease the resistance to movement of the raft unit.

To solve this problem, in a raft unit made of round timber of limited buoyancy, which are stacked in the lower, inner, and upper rows, the timber of the inner rows is laid perpendicular to the timber of the lower and upper rows and abut against the packages consisting of round timber of increased buoyancy, combined flexible harnesses, and laid parallel to the timber of limited buoyancy of the lower and upper rows, equipped with flexible internal ties located horizontally natal and connecting the extreme timber of limited buoyancy of the inner rows and flexible external strapping, covering the outside of the packages of timber of increased buoyancy and timber of limited buoyancy of the lower and upper rows, as well as vertical ties connecting the flexible internal connections and external strapping, according to the invention, a raft unit on the bottom and sides wrapped in a sheet of flexible waterproof material, along the edges of which slings are fixed with connecting devices at the free ends x

A flexible waterproof material prevents the flow of water into the free spaces between the timber forming the raft unit, thus, the volume of the displaced liquid increases, and therefore, the sediment of the raft unit decreases and its buoyancy increases. Timber of a raft unit wrapped in a sheet of flexible waterproof material does not have direct contact with water, as a result of which water saturation of timber will not occur and their buoyancy margin will remain stable throughout the entire swimming period. The raft unit, wrapped along the bottom and sides in a sheet of flexible waterproof material, acquires a streamlined shape, which reduces the resistance to movement, and consequently, the energy consumption for towing is reduced.

Figure 1 shows a raft unit, a top view; figure 2 is a section aa in figure 1; figure 3 is a section bB in figure 1.

The raft unit consists of a sheet of flexible waterproof material 1, along the edges of which slings 2 with connecting devices 3 are fixed at their free ends, round timber of limited buoyancy 4, laid in transverse upper and lower rows and longitudinal middle rows, of round timber of increased buoyancy 5, united by flexible strapping 6 in packages located in the head and tail parts of the raft unit, flexible external strapping 7, covering outside packages of round timber of increased buoyancy ty 2 and rows of round timber of limited buoyancy 1, vertical ties 8 connecting flexible external strapping 7 and flexible internal ties 9, which together with flexible internal strapping 10 connect round forest products of limited buoyancy 4 middle longitudinal rows.

The assembly of the raft unit is carried out only ashore on a sheet of flexible waterproof material 1 previously spread out on the shovel in accordance with the assembly process of the raft unit described in the prototype (see US Pat. RF No. 2043255/11, Mcl B63V 35/62, 10.09 .1995, Bull. No. 25). After assembling the raft unit, the longitudinal edges of the sheet of flexible waterproof material 1 are wrapped, laying them on the longitudinal sides of the raft unit, tension the slings 2 and connect them with connecting devices 3, with which the tension of the slings 2 is also regulated. Wrap the transverse edges of the sheet of flexible waterproof material 1 laying them on the transverse sides (ends) of the raft unit, while the angular folds of the sheet of flexible waterproof material 1 are turned inward and laid along transverse sides (ends) of the raft unit, pull the slings 2 and connect them with connecting devices 3.

Already assembled raft units can be wrapped in a sheet of flexible waterproof material 1 by the above method, for which it is necessary to lay the assembled raft unit on a previously spread sheet of flexible waterproof material 1 using a crane or other lifting device.

The use of a raft unit of the proposed design makes it possible to alloy wood along rivers with shallow depths for a long time without loss of buoyancy and with low energy consumption.

Claims (1)

A raft unit made of round timber of limited buoyancy, which is stacked in the lower, inner and upper rows, and the timber of the inner rows is laid perpendicular to the timber of the lower and upper rows and butt ends in packages consisting of round timber of increased buoyancy, combined by flexible harnesses, and stacked parallel to the timber of limited buoyancy of the lower and upper rows, equipped with flexible internal ties located horizontally and connecting cr Ainu timber of limited buoyancy of the inner rows, and flexible external strapping covering outside packages of timber of increased buoyancy and timber of limited buoyancy of the lower and upper rows, as well as vertical ties connecting flexible internal ties and external strapping, characterized in that the raft unit is on the bottom and sides wrapped in a sheet of flexible waterproof material, along the edges of which slings are fixed with connecting devices at the free ends.

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