JPS6141083B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The center conductor winding method of the present invention is applicable to the case where a high voltage wire having a corrugated sheath on the outer periphery of a corrugated center conductor is manufactured. The present invention relates to a method for winding a conductor onto a winding drum.

(Prior Art) In conventional gas-insulated high-voltage electric wires, both the center conductor and the metal sheath around its outer periphery were rigid types with no flexibility. For this reason, with conventional gas-insulated high-voltage electric wires, the center conductor could not be wound onto a winding drum during the manufacturing process. Therefore, the inventor of the present invention developed a flexible gas-insulated high-voltage electric wire in which both the center conductor and the metal sheath around the center conductor are flexible.

Therefore, when manufacturing gas-insulated high-voltage electric wires, instead of immediately installing a corrugated sheath on the outer periphery of the manufactured center conductor, the center conductor is first wound onto a winding drum, and then later pulled out and a corrugated sheath is placed on the outer periphery of the center conductor. It became possible to form

(Problems with the prior art) However, the center conductor of a gas-insulated high-voltage wire dislikes dust and moisture, so simply winding it onto a winding drum at the end causes the problem that the center conductor gets dirty with dust and becomes susceptible to rust due to moisture. It was hot.

(Means for Solving the Problems) An object of the present invention is to prevent dust from adhering to the electric wires and the central conductor wound around the winding drum and from becoming moist.

In the present invention, a vinyl sheet 3 is laid on the winding drum 2 of a winding drum 1, a flexible corrugated center conductor 4 is wound on the sheet 3, and then the sheet 3 is folded inward. The corrugated center conductor 4 is wrapped around the folded sheet 3, and the joints of the folded sheet 3 are sealed as necessary.

(Example) The corrugated center conductor 4 to be wound around the winding drum 1 is manufactured, for example, as shown in FIG. 2.

This is done by running the strands 8, such as stranded copper wires or stranded aluminum wires, which are insulated with enamel or the like, in the direction of arrow A, and using a twisting machine (not shown) to connect them to arrow B.
The stranded conductor 10 is formed by rotating the conductor 10 in the direction shown in FIG. At the same time, the metal tube 14 is bent into a tubular shape so as to cover the stranded wire conductor 10 using a forming roller 13, and the joints of the bent metal tube 14 are continuously welded using a welding machine 15. After inspection, it is straightened using a straightening device 17 equipped with several rollers, and then corrugated using a corrugator 18 to form a corrugated center conductor 4 covered with a corrugated metal tube 19. Winding drum 1 with center conductor 4
Wind it up once.

In the present invention, at this time, a plastic sheet 3 such as a vinyl sheet is laid on the winding drum 2 of the winding drum 1, and after winding is completed, the sheet 3 is folded inward to wrap the corrugated center conductor 4.

As shown in FIG. 3, the corrugated center conductor 4 thus formed is pulled out from the winding drum 1 in the direction of arrow A in FIG. The support mounting device 22 is used to arrange the corrugated center conductor 4 at appropriate intervals, and then a metal band-shaped sheath material 23 made of aluminum, copper, stainless steel, etc. is vertically attached to the outer periphery of the insulating support material 21, and the sheath material 23 is gradually bent into a tubular shape by a forming roller 24 to cover the outer periphery of the insulating support 21 in a series, and the seam of the sheath material 23 is welded by a welding machine 25.
The welded area is inspected by a welding inspection device 26, straightened by a straightening device 27 consisting of several rollers, and then corrugated by a corrugator 28 to form a corrugated sheath 29, which is then transferred to a winding drum. Wind it up to 30.

(Effect of the invention) The winding method of the present invention has the following effects.

(1) A plastic sheet 3 is laid on the winding drum 2 of the winding drum 1, a corrugated center conductor 4 is wound on the sheet 3, and the corrugated center conductor 4 is wrapped around the sheet 3. The conductor 4 is not contaminated with dust or exposed to moisture.

(2) Since the wound corrugated center conductor 4 does not get dirty with dust or get damp, the process from manufacturing the corrugated center conductor 4 shown in FIG. 2 to forming the corrugated sheath shown in FIG. You don't have to do it all in a row. Therefore, the installation space for manufacturing equipment can be reduced.

(3) In addition to simply wrapping the plastic sheet 3, if you seal the seams of the wrapped sheet 3, it will be difficult for dust and moisture to enter the sheet, making it easier for the corrugated center conductor 4 and high-voltage wires to It becomes even harder to get dirty.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of manufacturing a corrugated center conductor, and FIG. 3 is an explanatory diagram of manufacturing a corrugated sheath. 1 is a winding drum, 2 is a winding drum, 3 is a plastic sheet, and 4 is a corrugated center conductor.

Claims (1)

[Claims] 1. Lay a plastic sheet on the winding drum of the winding drum, wind the center conductor of the high-voltage electric wire on the sheet, then fold the sheet inward to wrap the wound center conductor, and wrap it as necessary. A method for winding a corrugated center conductor of a high-voltage electric wire, characterized in that the seams of folded sheets are sealed.