JPS6139319A - Cable with magnetic material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a magnetic material that makes it possible to attach a magnetic material to a cable, magnetize it with a simple device, and easily detect the magnetized magnetic field. The present invention relates to a material-applied cable.

<Conventional technology> Conventionally, submarine/underground cables using magnetic materials were
There are steel wire armored communication cables, but all of them simply have steel wire attached to them to protect the cable or increase its mechanical strength. A magnetic material is added to the cable, magnetized with an appropriate code in the same way as magnetic tape for wiring, and the magnetic field generated by the cable is detected when it is laid on the seabed or underground and recovered for repairs. At present, there is no magnetically coated cable suitable for determining the cable position.

<Problems to be solved by the invention> Considering the magnetic properties of a cable coated with magnetic material for the purpose of magnetization and detection, the larger the residual magnetization, the better, but the coercive force It is preferable to use a magnet of several hundred millimeters because it is relatively easy to magnetize and there is little contact demagnetization due to contact with iron materials.
Also, in order to increase the magnetic field generated outside the cable,
It is necessary to place the magnetic material as close to the outside of the cable as possible.

If the iron wire sheathed cable is reviewed as a magnetic material-applied cable from the above viewpoint, it is preferable as a place to apply a magnetic material, but the holding force is insufficient. Furthermore, iron wire armored cables are expensive and may be difficult to install on deep seabeds due to the load.

In addition, as an alternative to iron wire armored cables, it is possible to use rubber magnets with magnetic powder mixed in rubber as the magnetic material, but currently available rubber magnets have an unnecessarily large holding force. It requires a large magnetizing machine, and has the disadvantage that the speed at which the rubber magnet is applied to the cable cannot be increased because the mechanical strength is low. For example, the second
Considering the method of winding the tape-shaped magnetic material around the cable center body as shown in the figure, and the method of winding the tape-shaped magnetic material together as shown in Figure 3, in the former case, the mechanical strength of the tape-shaped magnetic material is Because the strength is opaque, the winding speed cannot be increased, and the latter requires a mechanism to hold the seams so that they do not open after winding, which cannot be done with existing cable manufacturing equipment. . Furthermore, in terms of production, an efficient method seems to be to continuously coat the powder using an extruder, but since the hardness of the magnetic powder is generally high, wear of the extruder is a major problem.

SUMMARY OF THE INVENTION An object of the present invention is to solve the disadvantages of the magnetic properties and manufacturing methods of the prior art, and to provide a cable provided with a magnetic material that can be manufactured efficiently and has magnetic properties suitable for the above intended use.

〈Means for solving problems〉 The outline of the present invention that achieves this object is as follows.

(1) ffi powder The powder is wound around a magnetic material on a linear or thin plate containing at least a reinforcing material to increase mechanical strength and a resin for bonding these materials to form at least a part of the coating. Cable with magnetic material added.

Note that the magnetic powder is iron oxide r −Fe 10B +
The main component is at least one type of FeB 04 metal iron (Fe). In addition, the above-mentioned reinforcing daughter fibers, single wires, twisted wires.

It consists of at least one thin plate.

(O) In the magnetic material-added cable described in item 1 above, a thin plate is used as a reinforcing material to increase mechanical strength by causing buckling deformation of itself to give a desired deformation to the thin plate-shaped magnetic material. A magnetic material-applied cable characterized by containing a thin plate-like magnetic material.

Effects> With this configuration, desired magnetization is possible using the magnetic powder, and the cable has sufficient mechanical strength due to the reinforcing material, making manufacturing easier.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of an embodiment of a magnetic material-applied cable according to the present invention.

In the drawings, reference numeral 1 denotes a coating layer made of a linear or thin plate-like breakable material made of the material described in items (υ to (5)) above.

(υ Resin containing organic or inorganic fibers and magnetic powder to increase mechanical strength.

(2) A composite material made of a single wire or twisted wire or thin plate made of an organic or inorganic material and a resin mixed with magnetic powder to increase mechanical strength.

(3) A composite material comprising, as at least some of its constituent elements, a resin thin plate mixed with magnetic powder and a thin plate for giving a predetermined deformation to the resin thin plate by buckling deformation.

(4) The composite material according to item (2), in which the resin containing magnetic powder contains organic fibers or inorganic fibers to increase mechanical strength.

(5) The composite material according to item (3), in which the resin containing magnetic powder contains organic fibers or inorganic fibers to increase mechanical strength.

The magnetic powder described in items (1) to (5) above is iron oxide, preferably r -Fe, o, l FeB 0
4 or metallic iron (Fe) as a main component.

In the drawings, reference numeral 2 denotes a part that restores the original function of the cable, and in the embodiment, it is located inside the sheath 1 made of magnetic material, but it may be placed outside the sheath 1, or on both the inside and outside. or,
The coating 1 made of a magnetic material is not limited to one layer, but may have multiple layers.

3 in the drawing is an outer branch root that protects 1 and 2 in the drawing, and may be omitted.

Next, both embodiments using a wire-like magnetic material or a thin plate-like magnetic material used in the magnetic material-applied cable according to the present invention will be described in more detail. 4 to 7 are examples of linear magnetic materials, and FIGS. 9 and 10 are examples of thin plate-like magnetic materials. In these figures, 11 is resin, 12 is magnetic powder, 1
3 is an organic or inorganic fiber for increasing mechanical strength. 14 is a solid wire, a twisted wire, or a thin plate for increasing mechanical strength. Reference numeral 15 is a thin plate which not only imparts desired deformation to the resin containing magnetic powder by buckling itself, but also serves as a mechanical reinforcement.

In the linear magnetic material shown in FIG. 4, magnetic powder 12 and fibers 13 for increasing mechanical strength, especially tensile strength, are dispersed in resin 11.

In the linear magnetic material shown in FIG. 5, a wire rod 14 is used to increase the strength.

In the linear magnetic material shown in FIG. 6, a plurality of wire rods 141 are used to increase strength.

The linear magnetic material shown in FIG. 7 is reinforced with both wire rod 14 and fiber 13.

The magnetic material-added cable according to this embodiment as shown in FIG. 8, which is constructed using the above-mentioned mechanically reinforced linear magnetic material, can be easily manufactured using ordinary cable manufacturing equipment. can.

Numbers 1, 2, and 3 in Figure 8 are the numbers +j in Figure 1, respectively.
Corresponds to those specified in 1 and 2.3. In the embodiment shown in FIG.
It is spirally wrapped in a single direction in a certain direction. The linear magnetic material may be spirally wound multiple times or may be braided.

The thin plate magnetic material shown in 9th +g is a thin plate made by mixing magnetic powder 12 into resin 11 and a thin plate 140 for mechanical reinforcement.
Consists of 2 layers. Of course, both the reinforcing thin plate 14 and the magnetic powder-mixed resin thin plate may have two or more layers. For example, a thin resin plate mixed with magnetic powder may be sandwiched between two reinforcing thin plates, or conversely, thin resin plates mixed with magnetic powder may be placed on both sides of the reinforcing thin plate 14. The magnetic material-applied cable according to this embodiment using such a thin plate-like magnetic material can be practically easily manufactured at a speed of light even with the configuration shown in FIG. 2.

The thin plate-shaped magnetic material shown in FIG. 10 is composed of a resin thin plate mixed with magnetic powder similar to that shown in FIG. 9, and a thin plate 15 which buckles and deforms itself to give desired deformation to the resin thin plate.

Among such thin plate magnetic materials, a multilayer structure similar to that described in the description of the thin plate magnetic material shown in FIG. 9 can be considered. By using the buckling deformation of the thin plate 15, magnetic material can be easily applied onto the cable center body in the configuration shown in FIG.

The desired magnetic properties of the magnetic powder 12, which is one of the main components of linear magnetic materials and thin plate magnetic materials, include a large residual magnetic flux density, a square hysteresis characteristic, and a coercive force of several hundred millimeters. Although it is about Rusted,
These are not essential features of this embodiment. Furthermore, since the a powder powder 12 is used in large quantities, it is desirable that the price be low. From this point of view, in the present invention, iron oxide having a coercive force of about 100 to 500 oersteds, preferably r-F6C%#Fe, is used as the magnetic powder in the present invention.
A magnetic powder whose main component is at least one of 204 metallic iron (Fe) is used.

As the resin mixed with the powdered magnetic material, any material can be used as long as it has some degree of flexibility and mechanical strength, but for example, polyethylene, vinyl chloride, urethane, rubber, etc. can be used. do. Among these, polyethylene is suitable in consideration of stability, usage history, etc.

In addition, as a fiber 13 for mechanical reinforcement, for example,
Glass fibers, carbon fibers, organic fibers such as Kefler, JLL1, thin metal wires, etc. are used. As the wire rod 14 for mechanical reinforcement, a Keplerian wire, an organic material such as polypropylene, or a single wire or twisted wire made of iron, aluminum, copper, etc. is used. Canes as thin plates 14 for mechanical reinforcement;
A thin plate made of resin such as polyethylene, or a thin plate made of metal such as iron, stainless steel, aluminum, or copper is used. Further, as the thin plate 15 used for imparting desired deformation, a thin plate of aluminum, iron, or the like may be used. Next, an example of use of the cable provided with magnetic material according to this embodiment will be explained. For example, the first
As shown in FIG. 1, the magnetic substance-applied cable is magnetized so that its direction is reversed at equal intervals in the length direction of the cable, such as NS, SN, NS, . . . . Then, a magnetic field as schematically shown by the broken line is generated. In order to magnetize in this manner, a device as shown in FIG. 12 may be used. Drill a hole in the yoke of the electromagnet so that the magnetic island cable can pass through the gap in the magnetic path. If the direction of the magnetic field in the air gap is reversed by operating the polarity switching switch at regular time intervals while pulling the magnetic material-applied cable at a constant speed, the pattern <a powder as shown in Figure 11 will be created. The body-applied cable can be magnetized. Therefore, by utilizing the fact that the magnetic field is periodic, the magnetic field can be easily detected.

<Effects of the Invention> According to the present invention, compared to conventional cables that are not provided with magnetic material, a larger magnetic field can be generated by magnetization, and the magnetic fibers in the environment in which the cable is placed can be generated. Magnetic fields can be easily detected even when the sound is relatively loud. Therefore, if the magnetic cable according to the present invention is used as a communications submarine cable, this magnetic field can be detected with a proton magnetometer, fluxgate magnetometer, etc. even when the cable is buried under the seabed, making it easy to locate the cable. It became possible to know.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a magnetic material-applied cable according to the present invention. FIG. 2 is an explanatory diagram of manufacturing by winding a tape-shaped magnetic material around a cable center body. The third ramie is an explanatory diagram of manufacturing by winding a tape-shaped magnetic material around a cable center body. 4 to 7 are detailed explanatory views of the linear magnetic material used in the embodiment of the magnetic material-applied cable according to the present invention. FIG. 8 is a partially cutaway perspective view of the embodiment in which FIG. 1 is enlarged. Figure 9 and 1
Figure 0 shows the cutting of a thin plate-like magnetic material used in an embodiment of the magnetic material-applied cable according to the present invention. In the drawings, reference numeral 1 denotes a magnetic material in the form of a wire or thin plate. The layer 2 is a portion that performs the original function of the cable. 3 is the outer covering 4, the cable center body 5 is a tape-shaped magnetic material 11, and the IIM resin 12 is a magnetic material. Powder 13 is organic or inorganic fiber 14 is a single wire or twisted wire; thin plate 15 is thin plate 21 is polarity switching switch 22 is N magnet 23 is coil 24 is yoke 25 is hole 26 is a gap Patent applicant International Telegraph and Telephone Corporation Agent Patent Attorney Attorney Department (1 person) Figure 1 Figure 2 Figure 3 Figure 6 Figure 7 Figure 8 Figure 10 Figure 11

Claims (2)

[Claims] (1) A cable provided with a magnetic material, characterized in that at least a part of the coating is a linear or thin plate-like magnetic material containing magnetic powder containing at least one of iron oxide and metallic iron as a main component. (2) Desired deformation is applied to the magnetic material by increasing mechanical strength and causing buckling deformation with a thin plate-shaped magnetic material containing magnetic powder whose main component is at least one of iron oxide and metallic iron. A cable provided with a magnetic material, characterized in that the thin plate provided with the magnetic material is part of the coating.