JP2002084648A - Insulated conductor of pressure resistance casing of submerged repeater and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve assembling work characteristic of a fiber field-through (insulated conductor) and the insulation characteristic of an insulation coverage. SOLUTION: This insulated conducted comprises a metal sleeve 1 formed of a cylindrical metal, which is connected at one end to a water-pressure resistance metal pipe 3 of a tail cable 2, in which the external circumference of the water-pressure resistance pipe 3 is covered with an insulation coverage and a joint nut 5, formed of a metal including a connector 5b for electrically connecting a power feeding cable 6 via a cylindrical portion 5a to the other end of the metal sleeve 1. Thereby, the connector 5b is projected vertical with respect to the Y axis in the axial direction (Z axis) of the metal sleeve 1, and the surface surfaces of the metal sleeve 1 and joint nut 5 are covered with the insulation coverage 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical submarine repeater, and more particularly, to an insulated conductor for introducing an optical fiber and a power supply line into a pressure-resistant housing of the optical submarine repeater, and a resin used for molding the resin. It relates to a molding die.

[0002]

2. Description of the Related Art FIG. 3 is a partial sectional view showing the configuration of a general optical submarine repeater, which is described in, for example, Japanese Patent Application Laid-Open No. 8-205375.

In FIG. 3, reference numeral 25 denotes a pressure-resistant housing, and a repeater circuit 28 is provided inside a cylinder 26 through a heat radiating / buffering body 27.
Are housed, and end plates 29 are fitted into both ends of the cylinder 26, and the entire periphery of the fitted portion is welded to form a sealed structure. Numeral 30 denotes a fiber feed through (insulated conductor) which penetrates through the end face plate 29 in an airtight manner, 2 denotes a tail cable connecting between the coupler 31 and the fiber feed through 30, and the tail cable 2 connects a plurality of optical fibers to water pressure. The water-resistant pipe is housed in a pipe, and the water-resistant pipe also serves as a power supply line. The outer surface of the pressure-resistant pipe is covered with an insulating material such as polyethylene. The optical fiber of the tail cable 2 is airtightly introduced into the fiber feed through 30 and is connected to the optical fiber of the repeater circuit 28 on the repeater circuit 28 side. Reference numeral 6 denotes a power supply cable in which a conductor is coated with an insulating material such as polyethylene, and electrically connects the fiber feed through 30 and the repeater circuit 28.

FIG. 4 is a sectional view showing a structure of a fiber feedthrough connected to a tail cable and a power supply cable and arranged in a pressure-resistant housing. In the figure, 1 is a metal sleeve made of a metal such as beryllium copper, 12 is an insulating coating made of polyethylene or the like covering the outer peripheral surface of the metal sleeve 1, and 5 is an electrical connection between the metal sleeve 1 and a conductor of the power supply cable 7. The joint nut 13 is an insulating coating made of polyethylene or the like covering the outer peripheral surface of the joint nut 5, and the joint nut 5 projects vertically from the outer periphery of the cylindrical portion 5a connected to the metal sleeve 1 and the cylindrical portion 5a. Connection 5b. Reference numeral 14 denotes a cap made of polyethylene resin having a through hole 15 through which the optical fiber of the tail cable 2 passes from the metal sleeve 1 to the repeater circuit. Tapered hole 32 of body 25
Reference numeral 33 denotes a PE welded portion obtained by welding the insulating coating 12 and the insulating coating 13 and the cap 15 and the insulating coating 13 with polyethylene.

[0005] In assembling the fiber feed through shown in FIG.
The joint nut 5 and the cap 15 covered with the insulating coating 13 from the opposite side are fitted to the metal sleeve 1 in order, and the insulating coating 12 and the insulating coating 13,
Then, the fitting portion between the cap 15 and the insulating coating 13 is integrated by the PE welding portion 33. That is, the joint nut 5
Has a connector 5b and cannot be inserted into the tapered hole 32 of the pressure-resistant housing 25. Therefore, the metal sleeve 1 side and the joint nut 5 side are separately formed, and the metal sleeve 1 is
2, the joint nut 5 is connected to the metal sleeve 1, and the insulating cover 12 and the insulating cover 13 and the cap 15, which is an insulating material, and the insulating cover 13 are welded to be integrated.

[0006]

As described above, the fiber feedthrough in the conventional optical submarine repeater is formed by dividing a metal sleeve provided with a metal ring and a joint nut covered with an insulating coating. It is necessary to combine within the tapered hole of the pressure-resistant housing and integrate by welding, and the workability is poor, and the fusion property of the welded part is unstable. There is a problem in that a defect occurs in the insulation coating of the welded portion extending to the metal portion of the metal sleeve or the joint nut, thereby deteriorating the insulating property, and causing discharge to occur easily with the end face plate.

An object of the present invention is to solve the above-mentioned problems, and to improve the workability of assembling a fiber feed through (insulated conductor) and improve the insulation of an insulating coating.

[0008]

According to the first aspect of the present invention, the insulated conductor of the first submarine repeater pressure-resistant casing has one end connected to the water-resistant metal pipe of the tail cable in which the outer periphery of the water-resistant metal pipe is covered with an insulating coating. A metal sleeve made of a connected cylindrical metal, and a connector for electrically connecting a power supply cable to the metal sleeve, wherein the connector is perpendicular to the Y axis in the direction of the center axis (Z axis) of the metal sleeve. The metal sleeve and the connector protrude, and the surfaces of the metal sleeve and the connector are covered with an insulating coating.

The insulating conductor of the second submarine repeater pressure-resistant casing according to the present invention is the insulated conductor of the first submarine repeater pressure-resistant casing, wherein the connector is arranged in the X-axis direction from the central axis direction of the metal sleeve. It is inclined.

The insulated conductor of the third submarine repeater pressure-resistant casing according to the present invention is the insulated conductor of the first submarine repeater pressure-resistant casing in which an insulating coating is formed by injection molding.

A first method of manufacturing an insulated conductor of a pressure-resistant casing of a submarine repeater according to the present invention is a method of manufacturing a water-resistant metal pipe of a tail cable in which an outer periphery of a water-resistant metal pipe is covered with an insulating coating from a tubular metal. Connecting the metal sleeve to one end of the metal sleeve, electrically connecting the other end of the metal sleeve, and protruding perpendicularly to the Y axis in the direction of the center axis (Z axis) of the metal sleeve. And a step of covering the surfaces of the metal sleeve and the connector with an insulating coating.

According to a second method of manufacturing an insulated conductor of a pressure-resistant enclosure of a submarine repeater according to the present invention, in the method of manufacturing an insulated conductor of a pressure-resistant enclosure of a first submarine repeater, an insulating coating is formed by injection molding. This insulating coating is fused to the insulating coating of the tail cable and the insulating coating of the power supply cable.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a sectional view showing Embodiment 1 of the insulated conductor according to the present invention. In the figure, reference numeral 1 denotes a metal sleeve made of a metal such as beryllium copper, one end of which is connected to the conductor 3 of the tail cable 2 by a connection portion 4. 5
Is a cylindrical portion 5a electrically connected to the metal sleeve 1,
Connector 5 connected to conductor of power supply cable 6 at connection portion 7
b, and the connector 5b protrudes in the direction of the central axis of the cylindrical portion 5a. Reference numeral 8 denotes a cap made of polyethylene resin having a through hole 9 through which the optical fiber of the tail cable 3 passes from the metal sleeve 1 to the repeater circuit. The outer peripheral surfaces of the metal sleeve 1, the joint nut 5, and the connection portions 4, 7 are made of polyethylene or the like. Covered with an insulating coating 10 made of. Reference numeral 11 denotes a metal ring that holds the metal sleeve 1 via the insulating coating 10 and is pressed to be in airtight contact with a tapered hole of a pressure-resistant housing (not shown).

As described above, the connector 5b projects in the direction of the central axis of the cylindrical portion 5a, and the joint nut 5 can pass through the tapered hole (see FIG. 8) of the pressure-resistant housing.
The metal sleeve 1 and the joint nut 5 are connected to each other, and the integrally formed one covered with the insulating coating 10 can be attached to the tapered hole of the pressure-resistant housing, thereby improving workability.

Further, since the insulating coating 10 is formed integrally without being welded, the insulating property is improved.

Next, a method of manufacturing the insulated conductor according to the present embodiment will be described. First, the conductor 3 of the tail cable 2 is connected to one end of the metal sleeve 1 at the connection portion 4. Next, the conductor of the power supply cable 6 is connected to the connector 5 b of the joint nut 5 at the connection portion 7. Next, the cylindrical portion 5 a of the joint nut 5 is connected to the other end of the metal sleeve 1, and thereafter, the insulating coating 10 is integrally formed on the surfaces of the metal sleeve 1, the joint nut 5 and the connection portions 4, 7.

The insulating coating 10 is formed by injection molding. By the injection molding, the insulating coating 10 having high insulating properties can be formed, and the insulating coating 10 can be fused to the insulating coating of the tail cable 2 and the power supply cable 6.

Embodiment 2 FIG. FIG. 2 is a side view showing one embodiment of a joint nut in the insulated conductor of the present invention (a).
And a sectional view (b).

As shown in FIG. 2, the connector 5b is
It is provided on the outer wall of the cylindrical portion 5a so as to protrude perpendicularly to the Y axis in the direction of the central axis (Z axis) of a.

In FIG. 2, the connector 5b is perpendicular to both the X axis and the Y axis, but may be inclined in the X axis direction. Since the extra length of the power supply cable needs to be spirally wound and accommodated in the extra length storage portion, the extra length of the power supply cable can be easily spirally wound by inclining the connector 5b in the X-axis direction.

[0021]

According to the insulated conductor of the first submarine repeater pressure-resistant housing according to the present invention, one end is connected to the water-resistant metal pipe of the tail cable in which the outer periphery of the water-resistant metal pipe is covered with an insulating coating. And a connector for electrically connecting a power supply cable to the metal sleeve, and the connector is connected to a central axis (Z) of the metal sleeve.
Since the metal sleeve and the connector protrude in the direction perpendicular to the Y axis in the (axial) direction and the surfaces of the metal sleeve and the connector are covered with an insulating coating, workability is improved.

Further, since the insulating film can be integrally formed, the insulating property is improved.

According to the insulated conductor of the second submarine repeater pressure-resistant casing according to the present invention, since the connector is inclined in the X-axis direction from the center axis direction of the metal sleeve, the remaining space of the power supply cable is reduced. It becomes easy to wind the length spirally.

According to the third insulated conductor of the submarine repeater pressure-resistant casing according to the present invention, since the insulating coating is formed by injection molding, the insulating coating is different from the insulating coating of the tail cable and the power supply cable. It fuses and insulation is improved.

According to the first method of manufacturing the insulated conductor of the pressure-resistant casing of the submarine repeater according to the present invention, the water-resistant metal pipe of the tail cable in which the outer circumference of the water-resistant metal pipe is covered with the insulating coating is formed in a cylindrical shape. A step of connecting to one end of a metal sleeve made of metal, a connector electrically connected to the other end of the metal sleeve, and projecting perpendicularly to the Y axis in the direction of the center axis (Z axis) of the metal sleeve; A step of connecting the conductor of the power supply cable coated with an insulating coating, and a step of coating the surface of the metal sleeve and the connector with an insulating coating, so that workability is improved and the insulating coating is formed. Since they can be formed integrally, the insulating properties are improved.

According to the second method of manufacturing the insulated conductor of the pressure-resistant casing of the submarine repeater according to the present invention, the insulating coating is formed by injection molding, and the insulating coating is formed on the tail cable and the power cable. Since it is fused, the insulating property is improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing Embodiment 1 of an insulated conductor of a submarine repeater pressure-resistant housing according to the present invention.

FIG. 2 is a side view (a) and a cross-sectional view (b) showing an example of a joint nut in the insulated conductor of the present invention.

FIG. 3 is a partial sectional view showing a structure of a submarine repeater.

FIG. 4 is a cross-sectional view showing the structure of an insulated conductor of a conventional submarine repeater pressure-resistant housing.

[Explanation of symbols]

1 Metal sleeve, 2 Tail cable, 3 Water resistant metal pipe, 4, 7 Connection, 5 Joint nut, 5
a cylindrical part, 5b connector, 6 power supply cable, 8 cap, 9 through hole, 10 insulating coating, 11 metal ring.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H038 CA38 CA49 CA67 4F206 AD03 AD18 AD35 AH34 AH77 JA07 JB12 JB20 JF05 5G375 AA18 BA27 BB46 CA02 CA13 CB05 CC02 DB35 DB41 EA08

Claims (5)

[Claims] 1. A metal sleeve made of a tubular metal having one end connected to the water-resistant metal pipe of a tail cable in which an outer periphery of the water-resistant metal pipe is covered with an insulating coating, and a power supply cable is electrically connected to the metal sleeve. A connector for connection is provided, wherein the connector protrudes perpendicularly to the Y axis in the direction of the central axis (Z axis) of the metal sleeve, and the surfaces of the metal sleeve and the connector are covered with an insulating coating. Insulated conductor of the underwater repeater pressure-resistant housing. 2. The insulated conductor of a pressure-resistant housing of a submarine repeater according to claim 1, wherein the connector is inclined in the X-axis direction from the center axis direction of the metal sleeve. 3. The insulated conductor for a pressure-resistant housing of a submarine repeater according to claim 1, wherein the insulating coating is formed by injection molding. 4. A step of connecting the water-resistant metal pipe of the tail cable in which the outer periphery of the water-resistant metal pipe is covered with an insulating coating to one end of a metal sleeve made of a tubular metal, wherein the step of connecting the water-resistant metal pipe is electrically connected to the metal sleeve. A connector protruding perpendicularly to the Y axis in the direction of the center axis (Z axis) of the metal sleeve,
A step of connecting the conductor of the power supply cable formed by covering the conductor with an insulating coating; and a step of covering the surfaces of the metal sleeve and the connector with an insulating coating. A method for manufacturing an insulated conductor. 5. The undersea repeater pressure-resistant casing according to claim 4, wherein the insulating coating is formed by injection molding, and the insulating coating is fused to the insulating coating of the tail cable and the insulating coating of the power supply cable. A method for manufacturing an insulated conductor.