RU199089U1 - BOAT HULL - Google Patents

Abstract

The hull of the boat belongs to shipbuilding and can be used mainly in the designs of small boats or amphibious snowmobiles intended for movement in conditions of external abrasive and shock impact on the hull of the boat in summer and winter conditions of use. The performance of the boat's hull is improved by providing better maintainability and increased shock resistance of the boat's hull, without significantly increasing the weight. There are stiffening, forming the sides and deepened with respect to the bow and side walls, the bottom of the inner and outer layers. There is an elastic material between the inner and outer layers. The inner layer is assembled using sheet metal with a frame. The outer layer is made of polyethylene sheets, which are attracted to the inner layer. 7 p.p. f-ly, 4 dwg

Description

The proposed utility model relates to shipbuilding and can be used mainly in the designs of small boats or amphibious snowmobiles intended for movement under conditions of external abrasive and shock impact on the boat hull in summer and winter conditions of use.

Known boat hull containing stiffening, forming the sides and deepened relative to the bow and side walls, the bottom of the inner and outer layers, between which there is an elastic material. The inner and outer layers form a cavity between themselves, which is filled with an elastic material in the form of polyurethane foam, by pouring it in a liquid form, followed by its curing. The outer and inner layers are made of glass fiber reinforced concrete. their connection to each other is carried out using the adhesive properties of polyurethane foam (US Pat. RF for utility model No. 165092, IPC В63В 5/00, publ. 10.10.2016, bull. No. 28).

The disadvantage of this design is the high rigidity of GRC, in which small holes are possible, which, although they do not lead to depressurization, since the cavity between the outer and inner layers is filled with polyurethane foam, but lead to the need for repair without the possibility of easy replacement of the entire outer layer in case of repeated damage and abrasion.

The task of the proposed utility model is to improve the performance of the boat's hull by providing better maintainability and increasing the impact resistance of the boat's hull, without significantly increasing the weight.

To achieve the specified technical result in the hull of the boat, containing the stiffening, forming the sides and the bottom of the inner and outer layers deepened relative to the bow and side walls, between which there is an elastic material, the following new features are applied.

The inner layer is assembled using sheet metal with a frame, while the outer layer is made of polyethylene sheets that are pulled to the inner layer.

In special cases, polyethylene sheets form an outer layer by obtaining a joint of their ends with each other, or by connecting them with an overlap with the direction of the overlap opposite to the direction of movement.

Also, in a particular case, the polyethylene sheets of the outer layer are pulled to the inner layer from the outside using screws.

In particular cases, ethylene vinyl acetate, foamed polyethylene or polyurethane foam are used as an elastic material located between the inner and outer layers.

In a particular case, the outer layer and elastic material are located only at the bottom of the boat hull height.

The proposed utility model is illustrated by the drawings, where FIG. 1 and 2 show special cases of the boat hull, cross-section; in fig. 3 and 4 - special cases of the boat hull, longitudinal section of the bow and bottom.

The hull of the boat contains stiffening, forming the sides and the bottom inner 1 and outer 2 layers deepened relative to the bow and side walls, between which there is an elastic material 3. In this case, the outer layer 2 and the elastic material 3 can be located along the entire height of the boat hull (Fig. 1), or only its lower part (Fig. 2), can form a flat or keeled bottom, and the sides can be inclined or vertical, mostly flat in shape. In addition, for the formation of displacement, a tailgate (not shown in the drawing) can be used, for example, made in the form of a transom, or the displacement can be obtained by using a large thickness of elastic material 3, which should, in this case, have a density lower than the specific water weight, and self-draining floor applied.

The inner 1 layer, for example, is made of aluminum or using other light structural metal or additionally other materials. In this case, the inner 1 layer is assembled using sheet metal with a frame having, for example, transverse 4, longitudinal 5 stiffeners, as well as gussets 6.

The outer 2 layer is made of polyethylene sheets, for example low or high pressure, which are drawn to the inner 1 layer, in particular from the outside using screws 7, which can be made countersunk or, as shown in the drawings, without their heads being countersunk. In this case, in special cases, polyethylene sheets form an outer 2 layer by obtaining a joint 8 of their ends with each other (Fig. 3), for example, by welding or without it, or by joining them together with an overlap with an overlap direction opposite to the direction of movement (Fig. 4 ).

In special cases, ethylene vinyl acetate (Evaplast), foamed polyethylene or polyurethane foam is used as an elastic material 3 located between the inner 1 and outer 2 layers.

The boat's hull works as follows.

Since the inner 1 and outer 2 layers form the sides and the bottom deepened relative to the bow and side walls, it is possible to transport goods and / or passengers with a low location of their center of gravity, while they are protected from a large wave and external obstacles during movement, for example, in the form of overgrowth of grass and bushes, ice.

When driving on water, external obstacles such as ice, underwater and emerging vegetation and rocks affect the outer layer 2. Since the outer layer 2 is made of low pressure polyethylene, a high impact resistance is achieved while maintaining satisfactory rigidity in both summer and winter conditions. With external impacts, in the impact localization zone, the outer layer 2 bends due to the elastic material 3, which redistributes the load over a large area of the inner layer 1. Therefore, the inner 1 layer can be made lighter by using sheet metal, the rigidity of which can be provided by a frame having, for example, transverse 4, longitudinal 5 stiffeners, as well as gussets 6, which can also be lightweight, since the rigidity of the boat hull is also provided outer layer 2, due to the mechanical properties of low or high pressure polyethylene.

The use of ethylene vinyl acetate (Evaplast), foamed polyethylene or polyurethane foam as an elastic material 3 makes the structure lighter, since these air-containing materials do not absorb water well, while possessing shock-absorbing properties.

The use of low or high pressure polyethylene sheet for the outer 2 layer improves the maintainability of the boat hull, since when it wears out, it can be replaced, and low or high pressure polyethylene has sufficient flexibility and at the same time better wear resistance and impact strength. This technical result is more pronounced when the polyethylene sheets of the outer 2 layer are drawn to the inner layer from the outside using screws 7, which make them easy to replace. Also, maintainability improves when polyethylene sheets form the outer 2 layer by connecting them together not in the joint 8 (Fig. 3), but with an overlap with the direction of the overlap opposite to the direction of movement (Fig. 4), since the complexity of fitting the sheets of the outer 2 layer is reduced ...

When the outer layer 2 and the elastic material 3 are located only along the lower part of the height of the boat hull (Fig. 2), there is a lesser increase in the weight of the boat hull while maintaining maintainability and satisfactory impact resistance. since the blows mainly fall on the lower part of the boat's hull.

In a particular case, the use of polyethylene foam, polyurethane foam, and ethylene vinyl acetate (Evaplast) as an elastic material 3. which have a relatively low density, absorb little water and have sufficiently high elastic properties, leads to better provision of shock resistance of the boat hull, improvement of its operational properties.

Thus, the performance of the boat's hull is improved by providing better maintainability and increasing the impact resistance of the boat's hull, without significantly increasing the weight.

Claims (8)

1. The hull of the boat, containing stiffening, forming the sides and deepened relative to the bow and side walls, the bottom of the inner and outer layers, between which there is an elastic material, characterized in that the inner layer is assembled using sheet metal with a frame, and the outer layer is made of sheets polyethylene, which are attracted to the inner layer. 2. The boat hull according to claim 1, characterized in that the polyethylene sheets form an outer layer by making a joint between their ends. 3. The boat hull according to claim 1, characterized in that the polyethylene sheets form an outer layer by overlapping them with the direction of the overlap opposite to the direction of movement. 4. The boat hull according to claim 1, characterized in that the outer layer polyethylene sheets are drawn to the inner layer from the outside using screws. 5. The boat hull according to claim 1, characterized in that ethylene vinyl acetate is used as an elastic material located between the inner and outer layers. 6. The boat hull according to claim 1, characterized in that foamed polyethylene is used as the elastic material located between the inner and outer layers. 7. The boat hull according to claim 1, characterized in that foamed polyurethane foam is used as an elastic material located between the inner and outer layers. 8. Boat hull according to claim 1, characterized in that the outer layer and elastic material are located only along the lower part of the boat hull height.

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