JPS5849026A - Method of treating connector in same diameter connection of aluminum coated of cable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION "FIG. 1" is a schematic diagram of a same-diameter connection of aluminum covered OF cables, in which 10 indicates a cable, 20 indicates an aluminum connecting tube, and 30 indicates a connector.

This connector 30 is left in place even after the vacuum lubrication operation in non-uniform diameter connections.

However, in the case of a connection of the same diameter, if the connector 30 is left protruding, it becomes a hindrance, and the effect of making the diameter the same is diminished. Therefore, it is necessary to remove it after completing the vacuum lubrication work.

Conventionally, connectors have also been removed in the same way for submarine lead-sheathed cables. In that case, make a hole in a part of the lead sheathing, attach a vacuum lead pipe with a connector by welding, and after completing the vacuum oiling work, caulk the base of the lead pipe and remove it, caulk, and fill the hole by welding. Take this method. However, this method cannot be directly applied to aluminum-covered 01 cables. The translation is as follows.

1) Aluminum welding is done at very high temperatures.

If there is oil on the welding surface, it will carbonize and welding will no longer be possible.

2) Due to the high temperature, the oil inside turns into gas, further increasing the internal pressure. At the same time, the aluminum sheath (base material for welding) melts and becomes thinner, unable to withstand the internal pressure and ruptures, causing gas to blow out.

In the case of aluminum, it is possible to cover the holes with epoxy, but this is not reliable.

The present invention provides a connector processing method that is highly reliable and problem-free even under hydraulic pressure.

Embodiment (Figures 2 to II) 50 in ``Figure 2'' is a connector manufactured by Altaku. Its main body 32
is attached to the connecting pipe 20 by welding 40.

The main body 32 is cylindrical, and the cable side end 320 has a narrow inner diameter. A screw 34 is cut on the inner surface, and a vertical groove 35 is provided by cutting out a portion of the screw (FIG. 3, its role will be described later).

When the vacuum lubrication work is completed, insert a wedge-shaped oil seal member 36 made of aluminum into the connector 30 (Fig. 3), and press the aluminum with a blind screw 68 made of aluminum to allow the oil in the cable 10 to flow out. Seal it to prevent it from happening.

After applying oil in this way, cut the connector 30 together with the blind screw 38 at a point slightly above the surface of the connecting pipe 20, for example, by about j■ (indicated by a dashed line 42 in FIG. 2). do.

Oil 120 remains between the connector and the oil seal member 36, and it is dangerous if it evaporates due to the heat of welding, so it is removed in advance using the vertical groove 35.

Then, as shown in "Fig.
4.

As the oil seal member, a metal l-ru 46 as shown in FIG. 3, a rigid O-ring 56 as shown in FIG. 6, etc. can also be used.

Effects (1) The connector 30 is cut and the cut surface is welded to aluminum, but oil is prevented from coming out on the welding surface because the oil seal member is used to prevent oil from coming out before aluminum welding. Therefore, aluminum welding can be performed without any problems.

(, 2) Since the position at which the connector 30 is cut is just above the surface of the connecting pipe 20, the protrusion caused by each 61Ak;A can be ignored, so it can be handled in the same way as a cable when extending the wire. .

(3) Since the cut surface of the connector 30 is welded with aluminum, it is more reliable than sealing it with epoxy or the like.

(vii) Since only a small area of the cut surface of the connector 30 is welded to aluminum, there is almost no loss of flexibility during bending.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram of the same diameter connection of aluminum sheathed OF cables, Fig. 2 and Fig. , FIG. 3 and FIG. 6 are explanatory diagrams of different examples of oil seal member parts. 10: Cable 20 Ni-aluminum connecting tube 60: Connector 32: Main body 34: Screw □ 36, 46 and 56; Oil seal member 38: Blind screw 44 Ni-aluminum welding patent applicant Tokyo Electric Power Company, Inc. Figure 2 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] (1) After cutting a thread on the inner surface of the cylindrical connector and completing the lubrication operation, a blind screw is fitted to the thread, and the thread is connected to the inner wall of the knurple side end of the connector body. An oil seal member is pressed in between to stop oil, and then the connector is cut slightly above the surface of the aluminum connecting pipe, and the main body and the blind screw are welded together with aluminum at the cut surface. Connector processing method 0 (2) for the same diameter connection of aluminum sheathed OF cables according to claim 1, characterized in that the oil seal member is a wedge-shaped metal body. Connector processing method in diameter connection 0 (3) Connector processing method in diameter connection of aluminum covered 01 cable according to claim 1, characterized in that the oil seal member is a metal ball (1) Oil seal 2. A method for processing a connector for same-diameter connection of aluminum-sheathed 01 cables according to claim 1, wherein the member is an 0 ring.