JPH036105Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to an apparatus for cleaning and removing conductor cutting copper powder adhering to the cut end of an OF cable conductor.

(Technical background of the invention and its problems) Generally, in order to connect the conductors of an OF cable, the cable conductor with an oil passage formed in the center is cut using an electric saw, and then the cut ends of the conductor are brought into contact with each other. A method is used in which a conductor connection sleeve is crimped on the outside.

However, a large amount of conductor cutting powder adheres to the ends of the cable conductors cut in this way and between the wires, and if this copper powder gets into the OF cable connections, especially the oil stopper unit at the connection parts, insulation will break down. There was a risk of an accident.

Therefore, before connecting the conductors, as shown in Fig. 1, the vicinity of the end of the conductor 2 of the OF cable 1 is washed by hand while squirting insulating oil 4 from the hose 3 onto the cut end of the conductor 2. , the adhering copper powder was washed away.

However, this method not only takes time and effort, but also makes it difficult to completely clean and remove the copper powder that has entered the interior of the conductor 1 from the end.

In FIG. 1, reference numeral 5 indicates an oil passage formed in the center of the conductor 2 of the OF cable 1, and reference numerals 6 and 7 indicate an insulating paper wrapping layer and a corrugated metal outer tube, respectively.

(Purpose of the invention) The present invention was made to solve such problems, and it provides a device for efficiently and completely cleaning and removing copper powder adhering to the cut end of an OF cable conductor and its vicinity. The purpose is to provide.

(Summary of the invention) The copper powder cleaning device for OF cable conductors of this invention is
Connect a metal pipe of sufficient length via a valve to the end of the hose that passes pressurized insulating oil, and
A flange is provided on the outer periphery of the metal tube near the valve, and a disc-shaped stopper is fitted in front of the flange to oil-tightly seal the end face of the OF cable conductor.

(Embodiments of the invention) The details of the invention will be described below with reference to embodiments shown in the drawings.

FIG. 2 is a partial vertical sectional view of an embodiment of the present invention. In this figure, reference numeral 8 indicates a copper powder cleaning device, which consists of a hose 9 made of synthetic resin with excellent oil resistance and good flexibility, a valve 10 attached to the tip of the hose 9 that can be opened and closed, and a valve 10 that can be opened and closed. A metal pipe 12 connected to the distal end of the hose 9 via a valve 10 and having a flange 11 on the outer periphery near the valve, and in contact with the flange 11 on the outer periphery of the metal pipe 12;
It is comprised of a disk-shaped stopper 13 made of oil-resistant rubber and fitted in front of the flange 11.

The rubber stopper 13 has a diameter somewhat larger than the cut end surface of the OF cable conductor that is to be cleaned of adhering copper powder, and the metal tube 12 has a tip that is fully connected to the oil passage in the center of the OF cable conductor. The length shall be sufficient to reach the depths and effectively clean the copper powder.

To perform copper powder cleaning using the apparatus configured as described above, the metal pipe 1 is opened with the valve 10 closed.
2 deeply into the oil passage 16 in the center of the conductor 15 of the OF cable 14, press it with the end face of the flange 11, and while bringing the rubber stopper 13 into close contact with the cut end face of the cable conductor 15, open the valve 10 and apply pressure. The insulating oil is strongly jetted from the tip of the metal tube 12 into the oil passage 16. The ejected insulating oil is pushed back into the oil passage 16 in the direction of the arrow by hydraulic pressure that is constantly applied from the opposite side.

Next, since the cut end surface of the cable conductor 15 including the open end of the oil passage 16 is oil-tightly sealed from the outside by the rubber stopper 13, the insulating oil pushed back passes between the strands of the cable conductor 15 near the cut end. The copper powder then flows out to the outside, and along with this, the copper powder adhering between the wires is completely washed away.

In the figure, reference numerals 17 and 18 respectively indicate the insulating paper wound layer and the corrugated metal outer tube of the cable.

(Effect of the invention) As is clear from the above explanation, according to the device of the invention, a metal tube is inserted deep into the oil passage while sealing the cut end of the OF cable conductor with a stopper, and insulating oil is squirted from the tip. Therefore, the cut copper powder accumulated between the cable conductor strands at the time of cutting the conductor can be completely washed away.

Therefore, there is almost no copper powder mixed into the connection part, and an OF cable connection part with excellent insulation properties can be formed.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical cross-sectional view for explaining a conventional method of cleaning copper powder from an OF cable conductor, and FIG. 2 is a partial vertical cross-sectional view of an embodiment of the present invention. 1, 14...OF cable, 2, 15...Cable conductor, 5, 16...Oil passage, 8...Copper powder cleaning device, 9...Hose, 10...Valve, 11...
Flange, 12...metal tube, 13...rubber stopper.

Claims (1)

[Scope of utility model registration request] A metal pipe of sufficient length is connected via a valve to the end of a hose through which pressurized insulating oil passes, and a flange is provided on the outer circumference of the metal pipe near the valve, and a flange is provided in front of the flange. A copper powder cleaning device for an OF cable conductor, characterized in that it is fitted with a disk-shaped stopper that oil-tightly seals the cut end surface of the OF cable conductor.