JP3723768B2 - Marine sealant and seal structure using it - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a marine sealing material that can prevent flames and hot gas from moving and spreading during a fire in a marine vessel, and a seal structure using the same.
[0002]
[Prior art]
FIG. 8 shows an example of a seal structure between the edge 2 of the hull deck 1 and the hatch cover 3 in a conventional ship. Between the edge 2 of the hull deck 1 and the hatch cover 3, a waterproofing waterproofing packing 4 is provided along the edge 2 of the hull deck 1 from the outer sea side of the hull, and a fireproof sealant is provided on the inner side of the hull deck 1. 5 is provided. The fireproof sealing material 5 is made of a non-flammable inorganic fiber, for example, a ceramic fiber, which is wrapped in a bar shape (tape shape) with a metal foil and used in a double arrangement.
[0003]
In addition, if the hole for cable wiring or the through hole for duct installation is standardized or the number is constant, it is possible to use a fixed inorganic sealing material, but it can be used on the ceiling of most compartments (boat cabins). An amorphous inorganic sealing material (putty-like heat-resistant sealing material) is used for the cable wiring through-holes and duct installation through-holes of the electric wires and information transmission / reception lines provided.
[0004]
[Problems to be solved by the invention]
The fire-proof sealing material 5 that has been used inward from the edge between the edge 2 of the hull deck 1 and the hatch cover 3 is significantly damaged by seawater and aeration associated with voyage. Therefore, normally, after a voyage of about six months to one year is completed, the new fireproof sealing material 5 is replaced. In addition, amorphous inorganic sealing materials used for cable wiring through holes and duct installation through holes have a property of solidifying once used. It was necessary to perform wasteful and labor-intensive work such as breaking and removing the inorganic sealing material, wiring it, and then filling it again with an amorphous inorganic sealing material. The present invention seeks to overcome these disadvantages of conventional marine seal structures.
[0005]
[Means for Solving the Problems]
As a result of studying the above problems, in a marine seal material for preventing the movement of flames and hot gases from gaps or holes formed in the marine structure, the core material composed of the laminated thermally expandable members is wound around. Covered with a sheath material consisting of a tube, the wound cladding tube is wrapped around the core material one or more times in the coating direction to form an overlapping portion, and the overlapping portion opens at high temperatures to allow thermal expansion of the core material A sealing material for ships was used. The thermally expansible member here is preferably an inorganic member having thermal expansibility in one direction. Here, one direction means any one of the three-dimensional directions. It is preferable to expand in one direction than to expand in the three-dimensional direction because the same member having a unit cross-sectional area has better sealing properties. As the one-way heat-expandable member, a known anisotropic expansion substance such as expanded graphite or vermiculite is held so as to be oriented in one direction in a fiber layer such as an inorganic fiber in the presence of an organic or inorganic binder. The heat-expandable member may be a single layer, but it is desirable that the heat-expandable member be laminated in a plurality of layers in a predetermined desired expansion direction in order to exhibit effective thermal expansion.
[0006]
A heat-shrinkable cladding tube or a wound cladding tube is used as a covering material for covering the thermally expandable member as the core material as described above. In any case, heat shrinkable synthetic resin such as polypropylene excellent in shrinkability and water vapor barrier property, or synthetic rubber such as CR, NR, NBR, etc. is adopted in consideration of weather resistance, elasticity and the like. The wound cladding tube is particularly preferred, and forms a tubular cladding tube by winding it in the direction of covering the thermally expandable member one or more times. The shape of the wound cladding tube is preferably a rectangular cross section, Polygonal cross sections can also be used. The advantage of the wound cladding tube is that it can easily open the overlapping part of the winding and put the thermally expandable member inside, and if the temperature becomes high in an emergency, the overlapping part will open and allow the expandable member to expand It is.
[0007]
Seal structure in a ship structure of the invention, arranged on the Symbol ship marine sealant into the gap or hole is formed in a ship structure, a heat transfer seals the gap due to thermal expansion of the thermally expandable member at a high temperature It is configured to shut off . In a preferred marine seal material, a thermally expandable member of a core material is laminated in a desired expansion direction, and an overlapping portion of a wound cladding tube that is a shell material is configured in the desired expansion direction. In this case, the gap or hole is necessary for the gap between the hatch cover and the hull, the gap between the bulkhead and the bulkhead or other members, the cable wiring through-hole, the duct installation through-hole, and other waterproof partitions and waterproofing. This is a place where a partition material is required. The arranged marine sealing material prevents the intrusion of seawater between the hatch cover and the hull by elasticity. When used for through holes for cable wiring and through holes for duct installation (edges of these holes), the hole for cable wiring and duct installation is adequately secured in normal times, but when the temperature becomes high in an emergency, It expands toward the center of the lip and seals the gap.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of an example in which the marine seal material of the present invention is disposed between a hatch cover and a hull (indicated by a two-dot chain line), and FIG. 2 is a cross-sectional view of the marine seal material mounted on the bottom surface of the hatch cover. FIG. 3 is an enlarged cross-sectional view of the marine sealing material of the present invention. As is apparent from these drawings, when the marine sealing material 10 of the present invention is used in a gap that occurs between the hatch cover 3 and the hull deck 1, the core material thermally expandable member 6 is covered with the outer shell material 7. When the coated material is used, the outer skin material 7 plays a role of preventing the intrusion of seawater in normal times, and the thermal expansion member 6 expands to prevent the spread of fire in the event of a fire. The heat-expandable member 6 has a heat-expandable member, a heat-resistant fiber such as ceramic fiber, and a binder (for example, Sumitomo 3M Co., Ltd. and Daegu Sangyo Co., Ltd. jointly developed for marine use. TK-Protect). When the temperature rises in an emergency and the expansion reaches a high level, the overlapping portion 7a of the core material 7 can be opened to allow further expansion of the thermally expandable member 6.
[0009]
That is, in order to make the thermally expansible member have the property of being thermally expansible in one direction, an anisotropic expansive material such as expanded graphite and vermiculite of the inorganic member is made of inorganic fibers or the like in the presence of an organic or inorganic binder. The fiber layer is held so as to be oriented in one direction. In this example, the thermally expandable member is laminated in four layers in the desired expansion direction (indicated by an arrow in FIG. 3) in order to effectively exhibit thermal expansion in one direction . Ship marine seal 10, as shown in FIG. 4, using a heat shrinkable cladding to the outer covering layer 7 made of a heat-shrinkable synthetic resin, it may be used to cover the outer periphery of the heat-expandable member 6.
[0010]
Figure 5 is a front view of the example of forming the ship marine sealant 10 in a ring shape. In this example, in order to protect the thermally expandable member 6, a protective ring 8 is extrapolated to the outer periphery thereof. As a method of laminating the thermally expandable members in multiple layers, it is preferable to sequentially use annular thermally expandable members having different outer diameters from the outer periphery toward the center. The ring may be not only a circle but also a square or a polygon.
[0011]
FIG. 6 shows the state of use of the marine sealing material 10 formed in a ring shape. It is attached to a through hole 11 for cable wiring provided in a partition wall 9 formed on the cabin. A plurality of cables 12 are wired using holes that are located closer to the center from the thermally expandable member 6. Since the heat-expandable member 6 has a certain degree of flexibility or elasticity, the number of cables 12 can be increased or decreased. There is no need to break it. In this way, the cable wiring and duct installation holes are adequately secured in normal times, but when the temperature becomes high during an emergency, the gap expands toward the center of the hole as shown in FIG. 7 and seals the gap. It is. This can prevent the spread of fire and the movement of combustion gas.
[0012]
【The invention's effect】
According to the marine sealing material of the present invention and the seal structure using the same, the sealing performance can be exhibited at a place where seawater is likely to enter, such as between the hatch cover and the hull in normal times. Moreover, other packings for preventing the intrusion of seawater are not required. Long service life. In other words, the fireproof packing can be used as a single unit, the structure is simple, and the fireproof packing deteriorates in 6 months to 1 year as before, including water and causing rusting. There is a feature that can be eliminated.
[0013]
Furthermore, normal wiring work and maintenance can be simplified in the through hole for cable wiring and the through hole for duct installation. When the temperature rises in an emergency, it expands and seals the gap. Thereby, it is possible to prevent the spread of fire, movement of hot gas, and combustion gas.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an example in which a marine sealing material of the present invention is disposed between a hatch cover and a hull.
FIG. 2 is a cross-sectional view showing a state where the marine sealing material is mounted on the bottom surface of the hatch cover.
FIG. 3 is an enlarged cross-sectional view of the marine sealing material of the present invention.
4 is an enlarged sectional view of another example of a ship marine sealant.
The Figure 5 ship marine sealant is a front view of the example of forming a ring shape.
FIG. 6 is a cross-sectional view showing a use state of the marine sealing material formed in the ring shape.
FIG. 7 is a cross-sectional view when the temperature becomes high in an emergency.
FIG. 8 is a cross-sectional view showing an example of a seal structure between an edge of a hull deck and a hatch cover in a conventional ship.

Claims (3)

In a marine sealing material for preventing the movement of flames and hot gases from gaps or holes formed in a ship structure, a core material made of laminated thermal expansion members is covered with a skin material made of a wound cladding tube. The wound clad tube is wound around the core material one or more times in the coating direction to form an overlapping portion, and the overlapping portion opens at a high temperature to allow thermal expansion of the core material. Marine sealant. Sealing structures in the gap or into the pores arranged marine sealing material according to claim 1, wherein, the ship you cut off due to thermal expansion to seal a gap heat transfer of the heat-expandable member at a high temperature舶formed on the ship structure . The marine seal material is a seal structure for a marine vessel according to claim 2, wherein a thermally expandable member of a core material is laminated in a desired expansion direction, and an overlapping portion of a wound cladding tube that is a skin material is configured in the desired expansion direction .

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