JPH103830A - Cable core supply device at of cable coating with metal sheath - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable core supply device, coating an OF cable with a metal sheath, that can be used for both of an insulation oil pit impregnation method and an impregnation method after vacuum sheathing. SOLUTION: A core supply device is provided with an iron pot body 1 for storing a cable core 4 of an OF cable and vacuum drying and impregnating insulation oil and an external turn table 3 installed beneath the iron pot body 1 and rotatably supporting the iron pot body 1, and at least one of an internal turn table 17 or a turn table 19 for storing the cable core 4 inside of the iron pot body 1 and vacuum drying inside of the iron pot body 1 is stored rotatably and removably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable core supply device for covering a metal sheath in an OF cable manufacturing process, and more particularly to a cable useful for an OF cable having a wide range of several km to several tens km. It relates to a core supply device.

[0002]

2. Description of the Related Art In a method of manufacturing an OF cable, a cable core housed in a vacuum drying oven is vacuum-dried, and then a large amount of insulating oil is poured into the oven. A mass impregnation method in which the cable core is immersed and oil immersed in a lump, and a vacuum-dried cable core is coated with a metal sheath such as lead coating or aluminum coating under vacuum, and then the inside of the cable is inserted from one end of this metal sheath cable. There is a post-vacuum-sheath impregnation method in which insulating oil is injected into the air. The former mass impregnation method is suitable for oil immersion of a cable having a long distance of several tens of kilometers and is applied exclusively to a long cable having a continuous length such as a submarine cable. On the other hand, the latter vacuum sheath post-impregnation method is applied to a relatively short cable having a length of about several km to 10 km, and the time required for impregnation of the same cable length is 100 to 1000 hours.

In the conventional mass impregnation method, for example, a cable core supply device as shown in FIG. 2 is used. FIG.
In the drawing, reference numeral 1 denotes a pot body of an annular cylindrical vacuum drying oil immersion tank having an A-A line as a central axis, and 2 denotes a lid portion which is hermetically attached to the pot body 1 via packing. Reference numeral 3 denotes a turntable provided rotatably on the bottom of the shuttle main body 1. Wheels 5 and rails 6 are provided below the turntable, and the turntable 3 is rotated by a driving device 7.
Reference numeral 4 denotes a paper core insulated cable core wound in the hook body 1 in an aligned manner. A steam pipe 11 for heating is attached to the outer peripheral face, the inner peripheral face and the bottom face of the shuttle main body 1 and the bottom face of the lid 2, and the steam pipe 11 is covered with a heat insulating material 12.
13 is a vacuum pipe. FIG. 3 is a cross-sectional view of the cable core supply device when the metal sheath is covered. In the figure, reference numeral 8a denotes a cable guide pipe, and the evacuation device 9
It is composed of a siphon tube evacuated. The lower end of the cable guide pipe 8a is
And the other end is connected to the metal sheath extruder 10.

[0004] Using the above-described cable core supply device, the cable core supply at the time of covering the metal sheath of the OF cable is performed as follows. That is, 1) First, a paper-wound insulated cable core 4 covered with insulating paper.
Is wound into the kettle body 1, the lid 2 is airtightly covered, and while the inside of the kettle body 1 is evacuated through the vacuum pipe 13 provided in the lid 2, heated steam is flowed through the steam pipe 11 to remove the kettle. By heating the inside of the main body 1, the cable core 4 is vacuum-dried. 2) After confirming that the cable core 4 has dried, the inside of the hook body 1 is filled with insulating oil through an oil supply pipe 14 provided in the hook body 1, and the cable core 4 is impregnated with the insulating oil. 3) Next, the lid 2 is opened, and the lower end of the cable guide pipe 8a is arranged in the oil 16 of the hook body 1 as shown in FIG. It is fed to the extruder 10 through the cable guide pipe 8 a by the rotation of the shuttle main body 1. At this time, the inside of the cable guide pipe 8a is filled with new insulating oil from the new oil supply port 31, and the cable core 4 and the insulating oil move in the cable guide pipe 8a in opposite directions. In this way, the insulation properties of the cable core 4 of the OF cable impregnated with the insulating oil deteriorate when gas (mainly air) is dissolved in the insulating oil. From inside to the metal sheath extruder 10, the inside of the cable guide pipe 8 a filled with insulating oil is sent out.

In the post-vacuum sheath impregnation method, for example, a cable core supply device as shown in FIG. 4 is used. In FIG. 4, an internal turntable 1 rotatably installed at the bottom inside a cylindrical hook body 1 having a driving device 7 is provided.
After winding the cable core 4 around the turn boule 19 placed on the top 7, the lid 2 is placed on the kettle body 1, and the cable core 4 is vacuum-dried as in the mass impregnation method. Next, in a vacuum state, a guide roll 15 provided on the side surface of the shuttle main body 1,
The cable core 4 is sent out via the cable guide pipe 8b, and vacuum metal coating is performed by the metal sheath extruder 10. At this time, the cable core 4 is sent out by rotating the turn boule 19 inside the shuttle main body 1 by the driving device 7. Then, after the metal coating is completed, insulating oil is injected from one end of the cable and impregnated.

[0006]

The mass impregnation method of insulating oil has a drawback that the oil comes into contact with the atmosphere, but the oil impregnation time is short and the oil impregnation is reliable.
This is an effective means when manufacturing a long cable of 0 km. On the other hand, the post-vacuum sheath impregnation method has the advantage that oil does not come into contact with the atmosphere during production, and the oil used is limited to cable cleaning and cable filling, so that only a small amount is required. This method is very effective when manufacturing an OF cable of several km to several tens km. However,
When manufacturing a long cable of km, the impregnation method after the vacuum sheath is not suitable from the viewpoint that the oil impregnation time is long and the oil impregnation is not reliable. As described above, conventionally, there have been equipment and economic problems in that two types of equipment, a mass impregnation method with insulating oil and a vacuum sheath post-impregnation method, are required according to the length of the production cable.

An object of the present invention is to provide an OF cable by performing a mass impregnation method of insulating oil and a post-vacuum sheath impregnation method in the same kettle with the above problem as a background.

[0008]

SUMMARY OF THE INVENTION The present invention provides a cable core supply apparatus for covering a metal sheath of an OF cable which has solved the above-mentioned problems. A kettle body to be impregnated, and an external turntable installed at the lower part of the kettle body to rotatably support the kettle body, inside the kettle body,
At least one of an internal turntable and a turn boule which accommodates the cable core and is vacuum-dried in the pot body is accommodated rotatably and detachably.

In the apparatus having the above-described structure, the shuttle is placed on the external turntable, and both the internal turntable and the turn boule or the turn boule are removed from the inside of the shuttle main body to accommodate the cable core. The cable core can be covered with a metal sheath by a mass impregnation method. In addition, by accommodating an internal turntable or a turn boule on which a turn boule is mounted inside the pot body, the cable core can be covered with a metal sheath by an impregnation method after a vacuum sheath. Thus, according to the present invention,
A mass impregnation method of insulating oil and a vacuum sheath post-impregnation method can be performed in the same pot.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an OF according to the present invention.
It is sectional drawing of one Embodiment of the cable core supply apparatus at the time of coating the metal sheath of a cable, and has shown the state currently operating by the vacuum sheath post-impregnation method. In FIG. 1, the same reference numerals are used for the same parts as those in FIGS.

In FIG. 1, an annular shuttle main body 1 in which a lid 2 is hermetically closed is set on an external turntable 3, and the external turntable 3 is rotatable on a rail 6 via wheels 5. It is installed and rotated by the driving device 7b. Inside the shuttle main body 1, an annular internal turntable 17 that is rotated by a driving device 7a is rotatably and detachably mounted, and an annular turn boule 19 is placed thereon. The internal turntable 17 and the turn boule 19 are provided detachably. The turn core 19 is wound with the cable core 4.

The following describes how to use this apparatus to metal sheath the cable core 4 in a vacuum sheath post-impregnation method. That is, first, the cable core 4 is vacuum-dried. Next, the external turntable 3 is fixed, and only the internal turntable 17 is rotated by the driving device 7a. By doing so, the turn boule 19 is rotated in a vacuum state, and the cable core 4 is sent out from the guide roll 15 attached to the outside of the shuttle main body 1. From there, the cable core 4 is sent to the metal sheath extruder 10 through the cable guide pipe 8b to perform vacuum metal coating. After the metal coating is completed, the insulating oil is injected from one end of the cable and impregnated, as in the conventional case. In addition,
Instead of providing the internal turntable 17, the turn boule 19 may be rotatably and detachably provided by a driving device (not shown), and the cable core 4 may be wound around the turn boule 19 and the cable core 4 may be fed out.

[0013] In order to metal sheath the cable core 4 by mass impregnation using this apparatus, the internal turntable 17 (including the wheel 5), the driving device 7a, the turn boule 19 and the rail 6 in the shuttle main body 1 are provided. Remove and accommodate the cable core 4. Then, it becomes equivalent to the conventional mass impregnation type apparatus shown in FIG.
To rotate the cable core 4 to be vacuum dried and impregnated.
Into the hook body 1. At this time, the cable guide pipe 8b for the vacuum sheath post-impregnation method is disconnected from the kettle body 1 and the metal sheath extruder 10 and removed. In this state, while the inside of the kettle body 1 is evacuated through the vacuum pipe 13 provided in the lid portion 2, heating steam is supplied to the steam pipe 11 to heat the inside of the kettle body 1.
Is vacuum-dried, and after vacuum drying, filling the kettle body 1 with insulating oil through the oil supply pipe 14 provided in the kettle body 1 and impregnating the cable core 4 with the insulating oil is performed by:
It is the same as the conventional one. Thereafter, the lid 2 is removed, and a cable guide pipe 8a for the mass impregnation method shown in FIG. 3 is attached. One end of the cable guide pipe 8a is placed in the oil of the kettle body 1, and the other end is connected to the metal sheath extruder 10. Then, cable core 4
By rotating the external turntable 3 with the driving device 7b from the oil in the kettle body 1 to the metal sheath extruder 10, the kettle body 1 is rotated, and the cable guide pipe 8a
Is also sent to the metal sheath extruder 10 to perform metal coating in oil in the same manner as before.

When the cable core 4 is covered with the metal sheath by the mass impregnation method, the turn boule 19 is removed, and the cable core 4 is placed and accommodated on an internal turntable 17 installed in the shuttle main body 1 to be insulated. By rotating the internal turntable 17 in oil, the cable core 4 can be sent out into the cable guide pipe 8.

[0015]

As described above, according to the present invention, O
A kettle body accommodating the cable core of the F cable for vacuum drying and insulating oil impregnation, and an external turntable installed below the kettle body and rotatably supporting the kettle body,
In order to accommodate at least one of an internal turntable or a turn boule that accommodates the cable core and vacuum-drys inside the kettle body inside the kettle body so as to be rotatable and removable, an expensive kettle is shared and a manufacturing cable is used. According to the length, it is possible to selectively use the mass impregnation method of the insulating oil and the post-vacuum sheath impregnation method.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one embodiment of a cable core supply device when an OF cable according to the present invention is covered with a metal sheath.

FIG. 2 is a sectional view of a cable core supply device used in a conventional mass impregnation method.

FIG. 3 is a cross-sectional view of the cable core supply device when a metal sheath is coated.

FIG. 4 is a cross-sectional view of a cable core supply device used in a conventional vacuum sheath post-impregnation method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hook main body 2 Lid part 3, 17 Turntable 4 Cable core 5 Wheel 6 Rail 7, 7a, 7b Drive device 8b Cable guide pipe 9 Vacuum evacuation device 10 Metal sheath extruder 11 Steam piping 12 Heat insulation material 13 Vacuum piping 14 Oil supply piping 15 Guide roll 16 Oil 19 Turnbour

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shinichi Suzuki 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Inside Furukawa Electric Co., Ltd.

Claims (1)

[Claims] 1. A kettle accommodating a cable core of an OF cable for vacuum drying and insulating oil impregnation, and an external turntable installed at a lower portion of the kettle to rotatably support the kettle, A cable core supply device for covering a metal sheath of an OF cable, wherein at least one of an internal turntable and a turn boule that accommodates the cable core and vacuum-drys in the kettle is accommodated rotatably and detachably.