Method of producing a wound insulating pipe

Details Method of producing a wound insulating pipe Method of producing a wound insulating pipe

1999-11-18

2001-09-04

Ball, Michael W. (Department: 1733)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S192000, C156S194000, C385S101000, C385S104000, C385S111000

Reexamination Certificate

active

06284082

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a method of manufacturing a wound insulator pipe, in particular for a high voltage insulator, having at least one duct for conductors, optical fibers and the like to be subsequently drawn in.
BACKGROUND INFORMATION
Insulator pipes and high voltage insulators with integrated conductors, in particular optical fibers, are known in many variants. European Patent No. 0 265 737 describes such an arrangement where the optical fiber is guided in the form of a spiral along an optical fiber support. The optical fiber support in turn is designed as an insulating filament located in the cavity of the high voltage insulator.
Another arrangement is described in U.S. Pat. No. 3,485,940, where an optical fiber is surrounded by a polyester pipe, which is guided through the shank of the insulator in the longitudinal direction.
European Patent No. 0 146 845 describes another high voltage insulator where the optical fiber is also guided in a groove in an intermediate layer located between the shank and the shields in the longitudinal direction.
In the above-described high voltage insulators, the optical fiber is usually drawn into the prefabricated insulator or insulator pipe. German Patent No. 27 55 734 describes the use of longitudinal grooves for this purpose, which form ducts and accommodate conductors or optical fibers; these ducts are subsequently closed. Similarly, French Patent No. 2 725 302 describes a spiral groove provided in the wall of the insulator and an extruded continuous elastomeric tape placed in this groove. Then the conductor is placed on the top side of this tape and the optical fiber and the tape are pressed together by rolling, for example, so the tape is laid on the bottom of the groove and is pressed into the elastomeric material.
German Patent No. 29 01 872 describes an optical fiber in a longitudinal intermediate layer; the optical fiber is led out of the intermediate layer through bores.
A conventional method of manufacturing high voltage insulators is by winding insulator pipes made of epoxy resins with a fiberglass or synthetic fiber laminate structure. Such insulator pipes are described in the company brochure “MR-Isolierrohre ROTAFIL® für die Hochspannungstechnik (ROTAFIL® MR Insulator Pipes for High Voltage Technology),” form VK23-0/88de.
With such insulator pipes made of wound fiberglass plastic, it is not convenient to provide grooves on the outer periphery as described in French Patent No. 2 725 302, and then reclose them using elastomeric material. This would negatively affect the electric strength, in addition to not providing a homogeneous, mechanically strong outer insulating body surface.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a suitable method for manufacturing a wound insulator pipe having at least one integrated duct for conductors or optical fibers to be subsequently drawn in, where the outer surface of the insulator pipe thus manufactured is smooth and without grooves, including subsequently closed grooves. Furthermore, the contour of the finished wound insulator pipe should not deviate from a circular shape.
One particular advantage of the method according to the present invention is that the surface of the finished wound insulator is completely smooth and homogeneous. This is important not only for high electric and dielectric strength, but also for mechanical strength; in addition, such a surface allows subsequent machining or treatment, such as grinding, painting, and the like without problems. Another advantage of the method according to the present invention is that no deviation from the circular shape occurs despite the hollow duct obtained during the procedure for subsequent insertion of optical fiber(s) or the like.


REFERENCES:
patent: 3485940 (1969-12-01), Perry et al.
patent: 4610033 (1986-09-01), Fox, Jr.
patent: 5594827 (1997-01-01), Joulie et al.
patent: 6203647 (2001-03-01), Schuler et al.
patent: 27 55 734 (1978-07-01), None
patent: 29 01 872 (1980-07-01), None
patent: 38 15 717 (1989-11-01), None
patent: 0 146 845 (1985-07-01), None
patent: 0 265 737 (1988-05-01), None
patent: 0 720 181 (1996-07-01), None
patent: 2 725 302 (1996-04-01), None
patent: 58-107037 (1983-06-01), None
patent: 94 06127 (1994-03-01), None
MR Maschinenfabrik Reinhausen, “MR-Isolierrohre ROTAFIL® für die Hochspannungstechnik”, 1991.

Affiliated with

Also associated with

Rating

Method of producing a wound insulating pipe does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of producing a wound insulating pipe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing a wound insulating pipe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2446919