KR100900512B1 - Reinforced structure and manufacturing method for hull of frp vessel - Google Patents

Abstract

A hull reinforcing structure for an FRP vessel is provided to prevent damage to a hull of the FRP vessel by increasing the hull rigidity of the FRP(Fiber Glass Reinforced Plastic) vessel and delay flooding through the damaged site. A hull reinforcing structure for an FRP vessel comprises a hull(10) of FRP material, a plastic housing having a block shape, and super absorbent resin. A vertical reinforcing member(14) and a horizontal reinforcing member(16) are alternately arranged along the inner surface of the hull. The plastic housing is closely fixed to a part or the whole of the hull inner surface and is positioned within a lattice formed by the vertical reinforcing member and the horizontal reinforcing member. The housing is filled with the super absorbent resin. The plastic housing is made of engineering plastic material and is broken with the hull together due to the same impact with hull rupture strength or bigger impact than the hull rupture strength.

Description

Reinforced structure and manufacturing method for hull of FRP vessel

The present invention relates to a hull reinforcement structure of a FRP vessel and a method of manufacturing the same. More specifically, the present invention effectively prevents hull breakage of FRP ships that are constantly exposed to external large and small impacts, such as waves, and of course, during the hull breakage of FRP material. The present invention relates to a hull reinforcement structure of a FRP ship and to a method of manufacturing the same, to secure the time required for evacuation and lifesaving by delaying flooding as much as possible.

In general, the term 'vessel' is a general term for water transportation that carries people or goods and runs on water.

These 'ships' can be classified in various ways according to their needs, but depending on the purpose of use, which is a general classification, commercial ships, naval ports, fishing boats, leisure ships, special purpose ships, etc. Small ships (30 to 50ft), etc., depending on the speed can be divided into super fast ship (40 knot), fast ship, high speed ship (25 knot or more), regular ships and the like.

On the other hand, interest in marine leisure activities is rapidly increasing thanks to the improvement of quality of life and the 5-day workweek system.

Considering the global trend, if the national income is over $ 30,000, leisure patterns change from land leisure activities to marine leisure activities. In Korea, where the three sides are the seas, the development of maritime leisure is expected to take off in the near future. .

In response to this, a small cruiser, which is a type of leisure high speed boat, is already attracting attention as a representative next-generation leisure vessel. In the manufacturing method, a mold-type fiber glass reinforced plastic (FRP) vessel capable of mass production This is attracting attention.

In this case, the FRP vessel is a general term for a hull (Hull), etc. of the vessel consisting of FRP, also known as Glass Reinforced Plastics (GRP) vessel, FRP is an aromatic nylon fiber and unsaturated such as glass fiber, carbon fiber, Kevlar and unsaturated It is a known material that combines thermosetting resins such as polyester and epoxy resins, and has excellent durability, impact resistance, abrasion resistance, rust resistance, and excellent workability.

As a result, FRP vessels can be designed and built more lightly with sufficient strength, less costly to repair and maintain because they do not rot or corrode, and have no seam or butt, which is beautiful in appearance and hulled. The resistance is small, which is advantageous in terms of speed of flux.

However, due to the nature of the material, FRP has a fatal disadvantage of high vibration resistance, low modulus of elasticity, and greater damage than metal in case of cracks, especially when the hull of a ship is hit by reefs or other offshore structures during operation. Not only is it highly probable, but it is constantly exposed to large and small impacts such as continuous vibrations such as slamming or springing, or collisions of waves, which can lead to hull breakage. This, in turn, has a problem that is directly connected to the damage caused by flooding.

The present invention has been made to solve the above problems, it is an object of the present invention to present a concrete way to minimize the damage caused by the occurrence of damage, such as cracks of the FRP hull.

To this end, the present invention is to provide a hull reinforcement structure of the FRP ship and its manufacturing method, specifically, to effectively prevent the hull breakage of the FRP material, as well as flooding through the corresponding part in the case of breakage such as cracks This paper suggests a practical way to secure enough time for port and life-saving as it can be delayed as much as possible.

The present invention in order to achieve the above object, the hull made of FRP material; A housing made of plastic material tightly fixed along the inner surface of the hull; And it provides a hull reinforcement structure of the FRP ship including a super absorbent resin filled in the housing.

In this case, the housing is characterized in that the hexahedral shape of the engineering plastic which is broken when an impact of a certain strength or more is applied, the contact surface of the housing in close contact with the inner surface of the hull is characterized in that the thickness relatively thinner than the other surface, the hull The housing further comprises longitudinal reinforcement and transverse reinforcement intersected along the inner surface of the housing, wherein the housing is located within the grating by the longitudinal reinforcement and transverse reinforcement.

In addition, it characterized in that it further comprises a laminate of FRP material covering the housing and the inner surface of the hull, wherein the hull and the laminate, it characterized in that it comprises a repeatedly laminated boeing layer and mat layer and a gel coat layer laminated on the outer surface It features.

In addition, the present invention (a) manufacturing a hull of the FRP material; (b) manufacturing a hull reinforcing member filled with a super absorbent polymer in a plastic housing; And (c) attaching the hull reinforcement member along the inner surface of the hull.

At this time, after the step (c), (d) further comprising the step of laminating the FRP laminate covering the hull reinforcing member and the hull inner surface, wherein the FRP laminate of the step (d) is vacuum laminated It is characterized by.

The hull reinforcement structure of the FRP ship according to the present invention can substantially increase the hull strength of the FRP ship to effectively prevent breakage and at the same time delay the inundation through the corresponding site when the hull breaks.

The hull reinforcement member for this purpose shows a configuration in which a super absorbent resin is filled in the housing of the plastic material. When the impact of the fracture strength of the FRP material is applied to the hull, the hull reinforcement effect of the housing prevents damage. Far exceeding the breaking strength of the FRP material, when high impact is applied to the hull, the contact surface of the housing with the hull is broken, and the superabsorbent resin therein absorbs moisture.

Therefore, even if the FRP hull is damaged, it is possible to secure the time required for evacuation and lifesaving, thereby promoting safety navigation according to lifesaving.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing an example of an FRP vessel according to the present invention, a single-acting small cruiser is a kind of leisure high speed vessel. In this case, FIG. 1 is only one example for describing the present invention, and the technical idea of the present invention is not limited thereto. It will be apparent to those skilled in the art through the following description.

As can be seen, the FRP vessel 100 according to the present invention includes an upper and lower superstructure 30 and a hull 10 and a hull and a deck 20 which is a boundary thereof.

At this time, the hull 10, the deck 20, the superstructure 30 is a basic component of the ship, so to look briefly, the oil tank and fresh water having a relatively large volume and weight in the hull 10 of the lower deck 20 Tanks such as tanks are properly mounted, and at the rear end thereof, a drive unit 40 such as a propeller exerting a propulsion force by the engine and its power and a steering gear for directional adjustment are installed. Along the edge of the deck 20 covering the hull 10 to provide an outdoor leisure space for the occupant, a plurality of eyes 22 used for towing and a hand rail 24 for occupant safety are provided. The cockpit and other cabins and toilets, which are installed and equipped with control means such as steering wheels, are located inside the superstructure 30 on the deck 20 formed of structures such as a wind shield 35. Etc. are provided.

On the other hand, Figure 2 is an exploded perspective view showing the hull 10 corresponding to the features of the FRP ship according to the present invention, it is shown with a portion of the drive unit 40, except for tanks for convenience.

As shown, the hull 10 of the FRP ship according to the present invention is made of FRP material, for convenience, divided into the bottom portion 12 corresponding to the bottom and the side portion 18 corresponding to the bottom and the bottom portion 12 The lower part of the side portion 18 is driven by the driving force of the drive unit 40 mounted on the rear end of the hull 10 while being submerged in water.

Along the inner surface of the hull 10, the longitudinal reinforcement 14 and the transverse reinforcement 16 intersect in a lattice shape to maintain hull strength in the longitudinal direction, respectively.

For reference, the longitudinal reinforcement 14 is also called the inner keel, longitudinal ribs, longitudinal floor, etc., depending on the position or shape of the longitudinal reinforcement, one of the longitudinal reinforcement from the stern to the rear of the hull is arranged on the centerline toward the entire longitudinal direction of the hull Also referred to separately as (keel), transverse stiffeners are sometimes called ribs, floors, etc. However, in the present invention, since there is no reason to distinguish them in particular, they are referred to as longitudinal reinforcement and lateral reinforcement. Furthermore, the plate members that complete the actual shape of the hull to provide an arrangement of longitudinal and transverse stiffeners are divided into 'bottom shells' at the bottom and 'side shells' at the bottom, respectively.實 益) Since it is not present, it is referred to as hull surface below.

In this case, in particular, a separate hull reinforcing member 50 is attached to the inner surface of the hull 10 of the FRP ship according to the present invention, preferably the hull reinforcing member 50 has a hexagonal block shape. It is made in close contact with the inner surface of the hull 10 in one-to-one correspondence in the lattice formed by the intersection of the longitudinal reinforcement 16 and the transverse reinforcement (14). The hull reinforcement member 50 may be selectively fixed to the entire inner surface of the hull 10 or optionally arranged at a portion having high possibility of damage, such as the inner surface of the hull 10 where the wave collision is concentrated during high speed operation. Where possible, the hull reinforcing member 50 is to increase the substantial strength of the contact portion to prevent the breakage of the hull 10, and at the same time delay the inundation through the cracked portion (파손) when the fracture occurs.

More specifically, FIG. 3 is a cross sectional view taken along the line III-III of FIG. 2, and FIG. 4 is an enlarged view of the circle A portion of FIG.

As can be seen, the hull reinforcing member 50 according to the present invention is made of a plastic housing 60, and a super absorbent polymer (70, super absorbent polymer) filled therein.

First, the housing 60 is made of an engineering plastics system exhibiting uniform mechanical strength over a wide temperature range and excellent chemical resistance and corrosion resistance to seawater, but breaking when an impact greater than a certain strength is applied.

Some examples of plastics having these characteristics include at least one of polycarbonate (PC), modified PPO (MPPO), polyamide (PA), acrylonitrile butadiene styrene (ABS), polybutylene terephalate (PBT), polyoxymethylene (POM), and polystyrene (PS). One or a mixture thereof may be used. The reason why the characteristics are required is to allow the housing 60 to be broken together when the hull 10 of the FRP material is damaged. Depending on the strength of the ship, there may be some differences, but it may be similar to the ship's hull, or 10-50% higher.

In addition, the contact surface 68 of the housing 60 in close contact with the hull 10, that is, the bottom surface of the housing 60 shown in the drawing may have a relatively thin thickness than the other surfaces 62, 64, 66. In this way, the contact surface 68 of the housing 60 together with the hull 10 is damaged by an excessive impact far exceeding the hull breakage strength applied outside the hull 10 of the FRP material, but is applied in other directions. It is appropriate that there is little damage. For example, assuming that the thickness of the contact surface 68 is 0.5 mm (t1 in FIG. 4), the thickness of the other faces 62, 64, 66 may be 1 to 1.5 mm (t2 in FIG. 4). ), The ratio of the thicknesses of the other surfaces 62, 64, 66 to the contact surface 68 of the 2) is determined 2-3 times.

In addition, the housing 60 may be bonded (bonding) to the inner surface of the hull 10 with a predetermined adhesive, the adhesive for this after bonding the inner surface of the hull 10 and the contact surface 68 of the housing 60 Structural organic adhesives that prevent hardening or lifting due to external forces when cured include thermosetting or polyamide-based thermoplastic adhesives such as waste paper resins, resorcinol resins, and urea resins, or rubber adhesives such as polysulfide, silicone rubber, and urethane rubbers. Can be used. Reference numeral 72 in FIGS. 3 and 4 denotes an adhesive layer by an adhesive.

Next, the super absorbent resin 70 (filled in the housing 60) is filled.

At this time, the super absorbent resin is a generic term of functional synthetic polymer material having a water absorption capacity of 500 to 1,000 times its own weight, and has a powder form called SAM (Super Absorbency Material), AGM (Absorbent Gel Material), etc. Absorption of this product turns into a gel, and exhibits a characteristic of not discharging moisture absorbed by the external pressure even at an external pressure. The superabsorbent polymer is a polymer in which a bridge bond or an insoluble portion is introduced into a polymer electrolyte, and is formed by graft copolymerization of acrylonitrile on starch or cellulose, or a block copolymer of acrylic acid and vinyl alcohol. Due to its unique water-absorbing ability, it has been put into practical use as a sanitary tool, and in addition to sanitary products such as paper diapers for children, horticultural soil refining agents, civil engineering, building index materials, seedlings, etc. It is widely used as a material for sheet, freshness keeping agent, food pack, ice band, etc. in the food distribution field.

As a result, the FRP ship according to the present invention, the hull reinforcing member 50 is filled along the inner surface of the hull 10, that is, the superabsorbent resin 70 in the plastic housing 60 of the hull reinforcing member (50) In this case, the impact strength of the FRP material to the hull 10 is applied to the hull 10 to prevent breakage through the hull reinforcement effect of the housing 60, and to further improve the fracture strength of the FRP material. When the high impact is applied to the hull 10, the contact surface 68 of the housing 60 together with the hull 10 is damaged and the superabsorbent resin 70 therein absorbs moisture.

Therefore, even when the hull 10 is broken, the time required for seawater intrusion into the hull 10 can be delayed as much as possible to secure time required for evacuation and lifesaving.

On the other hand, Figure 5 is a cross-sectional view showing a modification of the present invention in a form similar to Figure 3 for convenience, Figure 5 is an enlarged view of the portion B in the circle of Figure 4, with reference to Figure 2 above.

As shown, the hull reinforcement structure of the FRP ship according to a modification of the present invention shows a form in which a separate FRP laminate 80 is covered with the upper portion of the hull reinforcement member (60).

In other words, it may be viewed as a form in which a subsequent layer is laminated in a state in which a hull reinforcing member is seated on the corresponding layer after laminating an arbitrary layer during the lamination process of the FRP forming the hull 10. Due to the reinforcing member 60, the thickness of the lower part of the base may be reduced, and thus the hull strength may be reduced. Preferably, the hull reinforcing member 60 is formed along the inner surface of the hull 10 of the pre-finished FRP material as shown in the drawing. It is appropriate to further stack a separate FRP laminate after seating).

For reference, a typical hull FRP is composed of 40% glass fiber and 60% resin, and the glass fiber in the FRP absorbs the resin to form a mat layer and a roving layer responsible for rigidity ( After repeated lamination of the roving layer, a gel coat layer is laminated on the outermost surface exposed to the outside.

Accordingly, the hull and the FRP laminate of the FRP ship according to the present invention may also exhibit the same or similar form, and a vacuum lamination method, which is a known lamination method, may be used to laminate the FRP laminate.

In this case, the inner surface of the hull 10 and the contact surface 68 of the hull reinforcing member 60 need not be separately bonded with an adhesive or the like, and after the hull reinforcing member 60 is seated on the inner surface of the hull 10, the vacuum lamination is performed. By implementing the FRP laminated body can be fixed to the hull reinforcement member 60. Therefore, in FIG. 5 and FIG. 6, unlike FIG. 3 and FIG. 4, a separate adhesive layer 72 is omitted, but an adhesive may be used as necessary.

As a result, the hull reinforcement structure of the FRP ship according to the modification of the present invention can also expect the same action and effect as described above, the hull of the FRP ship that is constantly exposed to external large and small impact, such as the impact of the blue (10) ) In addition to effectively preventing breakage, when the hull 10 of the FRP material is damaged (파손), it is possible to secure the time required for evacuation and lifesaving by delaying the immersion through the corresponding part as much as possible.

In addition, the above description is only describing some aspects of this invention, The technical idea of this invention is not limited to this. That is, the present invention can be applied to steel wire or wooden boat, etc. in addition to the FRP ship, if necessary, there may be any variation in the specific configuration. However, these modifications should fall within the scope of the present invention as long as they are within the spirit of the present invention, and the scope of the present invention can be clearly understood by those skilled in the art through the following claims.

1 is a perspective view showing an FRP vessel according to the present invention.

Figure 2 is an exploded perspective view showing the hull of the FRP ship according to the invention.

3 is a cross-sectional view taken along the line III-III of FIG. 2;

4 is an enlarged cross-sectional view of the portion A of the circle of FIG.

5 is a cross-sectional view showing a modification of the present invention in the form of FIG.

FIG. 6 is an enlarged cross-sectional view of part B of FIG. 5; FIG.

<Explanation of symbols for the main parts of the drawings>

10: hull 12: bottom part

14: longitudinal reinforcement 16: transverse reinforcement

18: side 20: deck

22: child 24: handrail

30: superstructure 40: drive unit

50: hull reinforcing member 60: housing

70: super absorbent polymer 80: FRP laminate

Claims (9)

Hull of FRP material with longitudinal and transverse stiffeners intersected along the inner surface; A block-shaped plastic housing tightly fixed along a part or all of the inner surface of the hull so as to be located in the lattice by the longitudinal reinforcement and the transverse reinforcement; And A hull reinforcement structure of an FRP ship comprising a super absorbent polymer filled in the housing. The method according to claim 1, The housing is an engineering plastic material including at least one of polycarbonate (PC), modified PPO (MPPO), polyamide (PA), acrylonitrile butadiene styrene (ABS), polybutylene terephalate (PBT), polyoxymethylene (POM), and polystyrene (PS). The hull reinforcement structure of the FRP ship is broken together with the hull by the same or greater impact than the hull failure strength. The method according to claim 1, The contact surface of the housing in close contact with the inner surface of the hull is a hull reinforcement structure of the FRP ship having a relatively thin thickness than the other surface. The method according to claim 1, The housing is a hexahedral shape, the superabsorbent resin is a hull reinforcement structure of the FRP ship in the form of a powder containing a super absorbent material (SAM) or an absorbent gel material (AGM). The method according to claim 1, The hull reinforcement structure of the FRP ship further comprising a laminate of the FRP material covering the housing and the inner surface of the hull. The method according to claim 5, The laminate, the hull reinforcement structure of the FRP ship comprising a repeatedly laminated boeing layer, a mat layer and a gel coat layer laminated on the outer surface. (a) manufacturing a hull of FRP material in which longitudinal reinforcement and transverse reinforcement are cross-arranged along an inner surface; (b) manufacturing a hull reinforcing member filled with a super absorbent polymer in a block-shaped plastic housing; And and (c) attaching the hull reinforcement member along some or all of the inner surface of the hull so as to be located in the lattice by the longitudinal reinforcement and the transverse reinforcement. The method according to claim 7, After the step (c), (d) the method of manufacturing a hull reinforcement structure of the FRP ship further comprising the step of stacking the hull reinforcement member and the inner surface of the hull FRP. The method according to claim 8, The method of manufacturing a hull reinforcement structure of the FRP laminate in the step (d) of the FRP laminate is vacuum laminated.

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