KR20090043190A - High strength cable for ship - Google Patents

Abstract

The present invention relates to a cable for a ship, comprising: a conductor wire assembly unit comprising a conductor wire consisting of a center conductor and an insulator covering the center conductor; A binding tape surrounding the conductor wire assembly; An inner sheath provided around the binding tape and composed of a polyvinyl chloride (PVC) or a polyvinyl chloride (PVC) mixture; An outer sheath provided on the outermost side of the cable to protect the cable, the outer sheath consisting of a polyvinyl chloride (PVC) or a polyvinyl chloride (PVC) mixture; And a reinforcing tape interposed between the inner sheath and the outer sheath to surround the inner sheath.

Marine cables, metal braided, PVC, binding tape, sheath

Description

High Strength Cable for Ships {HIGH STRENGTH CABLE FOR SHIP}

The present invention relates to a cable for ships, and more particularly to a high strength cable for ships to improve the impact resistance by improving the internal structure and material of the cable.

It is important that ship cables used to supply power or control signals from ships have flame retardancy and impact resistance to minimize damage caused by shipboard disasters such as fire that may occur during navigation.

Conventional ship cable is composed of a conductor wire 10 consisting of a center conductor (10a) and an insulator (10b), a filler (11) filled outside the conductor wire 10, as shown in FIG. A binding tape 12 surrounding the outside of the conductor wire 10, an inner sheath (or bedding) 13 provided outside the binding tape 12 to protect the cable, and a metal braided layer 14. And an outer sheath 15. Patents related to marine cables having such a structure include Korean Patent Registration No. 384130 (high flame retardant low-flammable marine cable and its system composition), which is filed and filed by the present applicant.

In the conventional ship cable, the metal braided layer 14 is provided in a structure braided by metal such as copper, aluminum, iron, etc., and is disposed between the inner sheath 13 and the outer sheath 15 so as to surround the inner sheath 13. Interposed to protect cables from external shocks.

However, the ship cable provided with the metal braided layer 14 requires special tools to remove or cut the metal braided layer 14 when the cable is cut or stripped of the inner sheath 13 and the outer sheath 15. If the outer diameter of the metal braided layer 14 is small because the cable is made of a small cable, the impact resistance may be weak, and the center conductor 10a may be deformed by an external impact, thereby causing power loss. . In addition, there is a problem in that it is not easy to configure the unit by performing a metal braiding process during the cable association process, the cable connection operation is not easy because the handling is difficult as described above.

In addition, a ship cable provided with the metal braided layer 14 may cause power leakage between the center conductor 10a and the metal braided layer 14, thus limiting the thickness of the insulator 10b or sheath. Therefore, the cable outer diameter design is not free.

On the other hand, conventionally, in the manufacture of ship cables, the metal braided layer 14 was provided and a method of simply designing the thickness of the sheath was simply used to improve the tensile strength. There was a problem that the strength was excessively imparted and the handling of the cable was difficult.

The present invention has been made to solve the above problems, a high strength cable for ships comprising a sheath made of a high-strength material to provide impact resistance without using a metal braided layer and a non-metallic high strength reinforcement layer between the inner sheath and the outer sheath. The purpose is to provide.

Another object of the present invention is to provide a high-strength cable for ships having a structure in which impact resistance is reinforced by improving the material of the insulator covering the center conductor.

In order to achieve the above object, the present invention does not include a metal braided layer, and the sheath portion is formed by containing polyvinyl chloride (PVC), and the impact resistance is provided by providing a reinforcing tape layer between the inner sheath and the outer sheath. Disclosed is a high strength cable for ships.

That is, the ship's high-strength cable according to the present invention includes a conductor wire assembly unit in which a conductor line made of a center conductor and an insulator covering the center conductor is assembled; A binding tape surrounding the conductor wire assembly; An inner sheath provided around the binding tape and composed of a polyvinyl chloride (PVC) or a polyvinyl chloride (PVC) mixture; An outer sheath provided on the outermost side of the cable to protect the cable, the outer sheath consisting of a polyvinyl chloride (PVC) or a polyvinyl chloride (PVC) mixture; And a reinforcing tape interposed between the inner sheath and the outer sheath and surrounding the inner sheath.

The reinforcing tape is preferably made of polyethylene (PE) or polyethylene (PE) mixture.

The insulator is preferably made of any one or two or more selected from fluorine rubber, silicone rubber, natural rubber, and EPR (ethylene propylene rubber).

The present invention is excellent in flame resistance and impact resistance can be usefully used for the purpose of supplying power, communication, control signals and the like in the ship.

In particular, according to the present invention, it is possible to improve the tensile strength and elongation rate compared to the same dimensions as compared to the existing ship cable, even if manufactured as a small cable can sufficiently absorb external impact and maintain the appropriate strength required for ships.

In addition, there is an advantage that can easily perform the cable connection and branching compared to the existing ship cable provided with a metal braided layer.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

Figure 2 shows the configuration of a high strength cable for ships according to a preferred embodiment of the present invention.

Referring to FIG. 2, the ship's high-strength cable according to a preferred embodiment of the present invention goes from the inside to the outside of the conductor wire assembly 101, the filler 102, the binding tape 103, and the inner sheath 104. ), The reinforcing tape 105 and the outer sheath 106 are sequentially arranged.

The conductor line assembly 101 has a form in which a predetermined number of conductor lines 100 including a center conductor 100a extending in the longitudinal direction of a cable and an insulator 100b covering the cable are assembled in an associated structure.

The insulator 100b is made of fluorine rubber, silicone rubber, natural rubber, or EPR (ethylene propylene rubber), or a mixture of any two or more thereof, thereby providing insulation and impact resistance.

Fill 102 is provided to be filled to the outside of the conductor wire assembly 101 to maintain the associated structure of the conductor wires 100 to provide a cushioning function.

The binding tape 103 laterally wraps the conductor wire assembly unit 101 to tightly bind the conductor wires 100 to each other.

The inner sheath 104 is provided to surround the binding tape 103 to protect the conductor wire assembly 101 therein by absorbing external shocks. The inner sheath 104 is made of a mixture containing polyvinyl chloride (PVC) or polyvinyl chloride (PVC) having a relatively high impact resistance among polymer materials. At this time, as polyvinyl chloride (PVC), it is preferable that high density / high strength polyvinyl chloride (PVC) is employed.

The outer sheath 106 is provided on the outermost side of the cable to protect the cable from external impact or corrosion. Like the inner sheath 104, the outer sheath 106 is preferably made of a mixture containing polyvinyl chloride (PVC) or polyvinyl chloride (PVC) having high impact resistance as a main component.

The reinforcing tape 105 is interposed between the inner sheath 104 and the outer sheath 106 to surround the inner sheath 104 to act to reinforce the strength of the sheath. As the material of the reinforcing tape 105, it is preferable that not only good workability and impact resistance but also a high softening point of polyethylene (PE) or polyethylene (PE) mixture are adopted.

Figure 3 is a table comparing the mechanical performance of the high-strength cable for ships according to a preferred embodiment of the present invention compared to the prior art. Figure 3 (a) shows the mechanical performance of a conventional marine cable with a metal braided layer, Figure 3 (b) shows the mechanical performance of a high strength cable for ship according to a preferred embodiment of the present invention. Elongation and tensile strength in Figure 3 was measured according to ASTM (American Society for Testing and Materials) standard D638.

Referring to FIG. 3, the present invention measures diameter (D) or thickness (T) of the insulator 100b, the inner sheath 104, the outer sheath 106, and the like through improvements in construction and materials that are differentiated from the prior art. Even if the design is smaller than the prior art, it can be confirmed that mechanical properties such as elongation and tensile strength equivalent to those of the prior art are obtained.

In FIG. 3 (a), XLPE (Cross Linking-Polyethylene) was used as the material of the insulator, and polyvinyl chloride (PVC) was used as the material of the inner sheath 104 and the outer sheath 106. In FIG. 3B, EPR (ethylene propylene rubber) was used as the material of the insulator, polyethylene (PE) was used as the material of the reinforcing tape 105, and the inner sheath 104 and the outer sheath 106 were used. Polyvinyl chloride (PVC) was used as the material of.

Figure 4 is a graph showing the result of measuring the shock absorbing energy (or impact strength) by performing an impact test on the ship cable specimen prepared according to the design value shown in FIG. In FIG. 4, the dotted line graph is the impact energy curve for the conventional marine cable with a metal braided layer, the dashed-dot line graph is the impact energy curve for the conventional marine cable with only the metal braided layer removed, and the solid line graph is the preferred line of the present invention. Impact energy curve for a high strength cable for ships according to the embodiment. Here, the shock absorbing energy was measured according to ASTM standards E436 and D1852. Referring to Figure 4, the high-strength cable for ships according to a preferred embodiment of the present invention is improved in tensile strength and elongation as described above, even if the metal braided layer is not provided that the absorbed energy and strength of the cable to the external impact is sufficiently given You can check it.

Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto and will be described below by the person skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims.

The following drawings, which are attached to this specification, illustrate preferred embodiments of the present invention, and together with the detailed description of the present invention serve to further understand the technical spirit of the present invention, the present invention includes matters described in such drawings. It should not be construed as limited to.

1 is a cross-sectional view showing the configuration of a ship cable provided with a metal braided layer according to the prior art.

2 is a cross-sectional view showing the configuration of a high strength cable for ships according to a preferred embodiment of the present invention.

Figure 3 is a table comparing the mechanical performance of the high-strength cable for ships according to a preferred embodiment of the present invention compared to the prior art.

Figure 4 is a graph showing the impact test results for ship cable specimens manufactured according to the design value of FIG.

<Description of main reference numerals in the drawings>

100: conductor wire 101: conductor wire assembly

102: Fill 103: Binding Tape

104: internal sheath 105: reinforcing tape

106: external sheath

Claims (3)

A conductor wire assembly unit in which a conductor line including a center conductor and an insulator covering the center conductor is assembled; A binding tape surrounding the conductor wire assembly; An inner sheath provided around the binding tape and composed of a polyvinyl chloride (PVC) or a polyvinyl chloride (PVC) mixture; An outer sheath provided on the outermost side of the cable to protect the cable, the outer sheath consisting of a polyvinyl chloride (PVC) or a polyvinyl chloride (PVC) mixture; And And a reinforcing tape interposed between the inner sheath and the outer sheath to surround the inner sheath. The method of claim 1, The high strength cable for ships, characterized in that the reinforcing tape is made of polyethylene (PE) or polyethylene (PE) mixture. The method according to claim 1 or 2, The insulator is a high strength cable for ships, characterized in that made of any one or two or more selected from fluorine rubber, silicone rubber, natural rubber and EPR (ethylene propylene rubber).

Images