JPS635969B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to, for example, a method for connecting corrugated sheaths of gas-insulated high-voltage electric wires or corrugated metal tubes of center conductors.

(Prior Art) In conventional gas-insulated high-voltage electric wires, both the center conductor and the outer sheath are rigid.

(Problems with the prior art) There was an inconvenience that rigid high-voltage electric wires could not be wound around a drum. Moreover, since it cannot be rolled up, making it longer would be inconvenient for transportation and storage, and even if you tried to make it longer, it could not be rolled up, so there was a natural limit, so in the end, it had to be made shorter. However, if the length is shortened, the manufacturing cost increases, and there are also problems in that there are many connection points during installation, resulting in poor workability.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the inventor of the present invention has developed a flexible gas-insulated high-voltage electric wire that can be wound around a winding drum by making the center conductor and the outer sheath corrugated. developed.

An object of the present invention is to provide a method for connecting corrugated sheaths or corrugated metal tubes of the center conductor in an airtight manner without impairing flexibility when connecting high-voltage electric wires of this type. It's about doing.

As an example of the present invention, the one shown in FIG. 1 shows an intermediate connection part of a high-voltage electric wire.

This is done by welding smooth auxiliary rings 7, 8 to the outer periphery of the connecting ends 5, 6 of the corrugated metal tubes 3, 4 of the central conductors 1, 2 to be connected, and to the outside of the connecting ends 9, 10, smooth connections are made. The corrugated metal tubes 3 and 4 of the center conductors 1 and 2 are connected to each other by covering them with a corrugated sleeve 11 and welding both ends 9 and 10 of this sleeve 11 to the auxiliary rings 7 and 8.

Also, smooth auxiliary rings 16, 17 are attached to the outer circumferences of the connecting ends 14, 15 of the corrugated sheaths 12, 13 to be connected.
A connecting corrugated sleeve 20 with smooth ends 18 and 19 is placed on the outside of the sleeve 2.
The corrugated sheaths 12 and 13 are connected by welding both ends 18 and 19 of the 0 to the auxiliary rings 16 and 17.

Connection corrugated sleeve 20 and auxiliary ring 16,1
7, it is preferable to interpose O-rings 21 and 22 for airtightness as necessary.

(Operation) The connection of the intermediate connection portion shown in FIG. 1 is actually performed as follows.

Before connecting the stranded conductors 23 and 24 and the center conductors 1 and 2, the connecting ends 14 and 15 of the corrugated sheaths 12 and 13 are covered with auxiliary rings 16 and 17 and welded to the corrugated sheaths 12 and 13. A connecting corrugated sleeve 20 is fitted onto the outside of one of the auxiliary rings 16 and 17.

In this state, the connecting ends 5, 6 of the corrugated metal tubes 3, 4
Auxiliary rings 7 and 8 are placed on the auxiliary rings 7 and 8 and welded to the corrugated metal tubes 3 and 4, and a corrugated sleeve 11 for connection is fitted onto one of the auxiliary rings 7 and 8.

Next, the conductor sleeves 25 are fitted onto the stranded conductors 23 and 24 protruding from the ends of the corrugated metal tubes 3 and 4, and the sleeves 25 are compressed, crimped, soldered, etc. to form the stranded conductors 23 and 24. , connect 24 comrades.

After this, the connecting corrugated sleeve 11 that was previously fitted onto the auxiliary ring 7 is pulled back so that it straddles both the auxiliary rings 7 and 8, and both ends of this sleeve 11 are welded to the auxiliary rings 7 and 8. to connect the center conductors 1 and 2 together.

After the connection of the center conductors 1 and 2 is completed, the insides of the corrugated sheaths 12 and 13 are thoroughly cleaned, and then the corrugated sleeve 20 for connection that was previously fitted onto one of the auxiliary rings 16 is attached to the auxiliary ring 16. , 17, and both ends of this sleeve 20 are welded to the auxiliary rings 16, 17 to connect the corrugated sheaths 12, 13.

In this case, the auxiliary rings 16, 17 may be used as necessary.
O-rings 21, 2 between the connecting sleeve 20 and the connecting sleeve 20
2 may be interposed.

When connecting center conductors 1 and 2, the second
It is preferable to do as shown in the figure. A plug 26 made of heat-resistant rubber or the like is placed between the center conductor 1 and the corrugated sheath 12, and a pipe 27 is passed through the plug 26, and an inlet of the pipe 27 protrudes outside the corrugated sheath 12. N ₂ gas or dry air is inserted through the plug 28 and the gas or air sent out from the outlet 29 flows out in the direction of the arrow (outside) through the plurality of pores 30 formed in the plug 26, thereby causing the central conductor to This is to prevent dust, moisture, etc. from entering the center conductor 1 from the outside when connecting the conductors 1 and 2.

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

(1) Corrugated sheath 12, 13 or center conductor 1, 2
Flat auxiliary rings 7, 8, 16, 17 are provided between the connecting ends of the corrugated metal tubes 3, 4 and the connecting corrugated sleeves 11, 20, so that the corrugated sheaths 12 and 13 can be connected to each other or The corrugated metal tubes 3 and 4 can be connected airtightly and easily.

(2) Since flexible materials are used as the connecting corrugated sleeves 11 and 20, the flexibility of the connecting portion is not impaired.

(3) Connection corrugated sleeve 20 and auxiliary ring 16,
If O-rings 21 and 22 are interposed between the connector and the connector 17, the airtightness of the connection will be further improved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the connection method of the present invention, and FIG. 2 is an explanatory diagram of the connection method of the center conductor. 1 and 2 are center conductors, 3 and 4 are corrugated metal tubes, 5,
6 is a connecting end of a corrugated metal tube, 7, 8 is an auxiliary ring, 11 is a corrugated sleeve for connection, 9, 10 is an end of a corrugated sleeve for connection, 12, 13 is a corrugated sheath, 14, 15 is the connecting end of the corrugated sheath, 16,
17 is an auxiliary ring, 18 and 19 are the ends of the auxiliary ring, 20 is a corrugated sleeve for connection, and 21 and 22 are O
ring.

Claims (1)

[Claims] 1. A smooth auxiliary ring is welded to the outer periphery of the connecting end of the corrugated sheath or the corrugated metal tube of the center conductor to be connected, and a corrugated sleeve for connection with smooth ends is placed on the outside of the auxiliary ring. A method for connecting corrugated sheaths and corrugated metal tubes of a center conductor, characterized in that the corrugated sheaths or corrugated metal tubes are connected by welding both ends of the sleeve to an auxiliary ring. 2. The corrugated sheath according to claim 1, in which an O-ring for airtightness is interposed between the corrugated sleeve for connection and the auxiliary ring as necessary, and the corrugated metal tube of the central conductor. Connection method.