JPS62222516A - Stranded 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 [Technical Field of the Invention] The present invention relates to a stranded cable that is connected to an airtight container, and in particular, the invention relates to a stranded cable that is connected to an airtight container, and particularly to a stranded cable that allows gas such as air to pass through fine gaps between the core wires of the stranded cable. This invention relates to a stranded cable that is prevented from entering an airtight container.

[Technical Background of the Invention and Problems thereof] An example of an airtight container to which a power supply line is connected is a laser container for a laser oscillation device.

The laser oscillation device contains CO at a predetermined mixing ratio in a laser container.
A mixed gas of 2.He-N2 is sealed at a pressure of, for example, 45 Torr, and a discharge is performed in this gas to output a predetermined laser beam.

However, when a high-frequency power source is used as a high-voltage power source to perform the above-mentioned discharge, the core wire of the power source wire is a twisted wire, so air from the outside passes through the minute gaps between the twisted wires of the power source wire. It may invade.

When outside air enters the laser container, the mixing ratio of the mixed gas changes, deteriorating the conditions for laser oscillation. Further, the atmospheric pressure of the gas changes, deteriorating the discharge condition, and furthermore, oxygen and the like are mixed in, causing problems such as deterioration of the discharge device.

[Summary of the Invention] An object of the present invention is to reliably prevent impure gases such as air from entering the inside of the container through gaps between the core wires of the stranded wires in a stranded cable connected to an airtight container. The purpose is to provide stranded cables.

Another object of the present invention is to prevent air from entering through gaps between the core wires of a stranded cable inside the connector, which is a wire connecting member.

In order to achieve the above object, in the present invention, at least a portion of the stranded wires is provided with an airtight means for closing minute gaps formed between the stranded wire core wires.

[Embodiments of the Invention] As shown in FIG. 1, a laser oscillation device 1 is constructed by housing a laser oscillation element in a cylindrical laser container 3. As shown in FIG. On the right side of the laser container 3, there is a high frequency AC power line 5, CO2, )le, which is a twisted cable according to an embodiment of the present invention.
A gas supply pipe 7 and a gas exhaust pipe 9 for supplying and exhausting a mixture of gases such as , N2, etc., a cooling water pipe 11 for internal cooling, etc. are connected.

An output window 13 for the laser beam LB is formed on the left side of the laser container 3.

As shown in FIG. 2, a pair of upper and lower discharge electrodes 17 .
9 are provided vertically along the longitudinal direction of the container 3 at predetermined intervals. Below these discharge electrodes 17 and 19, a blower 21 is provided which rotates counterclockwise in the h1 direction in FIG. 2 and creates a counterclockwise gas flow A within the container 3.

Heat exchangers 23 and 25 are provided between the blower 21 and the discharge space B formed by the pair of upper and lower discharge electrodes 17 and 19. In addition, gas flow A is located around the passage of gas flow A.
Flow control plates 27, 29, 31 are provided to facilitate this. Only the power line 5 connected to the discharge electrodes 17 and 19 is shown, and the power line to the blower 21 and the like are omitted. Note that the power frequency supplied to the power line 5 is, for example, 10 KHz.

A pair of holding mirrors 33, 35 (see FIG. 3) are disposed facing each other at both longitudinal ends of the interior of the laser container 3.

As shown in FIG. 3, the laser container 3 is composed of a front cap 3a, a main body 3b, and a rear cap 3C.

The rear cap 3C has a through hole through which the power line 5, gas supply pipe 7, gas exhaust pipe 9, cooling water pipe 11, etc. pass, and a metal sealing part is formed in the through hole. 37d and 37e are screwed together airtight.

The gas supply pipe 7. Gas exhaust pipe9. The cooling water pipe 11 is
Said sealing screws, 37d, 37e.

It is connected to the laser container via 37c.

The high frequency power line 5 is connected using a connector 39, and this connector 39 is connected to the sealing screw member 37a.
(37b) is fixed. It is assumed that the power supply line 5 is connected to an internal power supply line 5a and an external power supply line 5b. Furthermore, the rear cap 3C is provided with a cover 41 for protecting the connector 39, the sealing portion, etc.

The external power supply line 5b, the gas supply pipe 7. The gas exhaust pipe 9 is
It is connected to an electrical system controller 43, a gas intake controller 45, and a gas exhaust controller 47 via the cover 41, respectively.

As shown in FIG. 4, the connector 39 airtightly connects the internal power line 5a and the external power line 5b inside it, and the core wires 49,
51 is covered with a heat shrink tube 53, and the outer circumference of the heat shrink tube 53 is covered with the first. A shield case 55 is provided by brazing second shield cases 55a and 55b, and a seal member 57 is molded into this case 55.

The cores of the power supply lines 5a and 5b! 149.51 is solder 59
is connected using This solder 59 is the core wire 49,5
The entire cross section of the core wire 49, 51 is melted and infiltrated without any gaps in order to make the space between the core wires 49 and 51 airtight.

Although the sealing member 57 is made of silicone rubber, it is easier to manufacture the sealing member 57 by using a one-component type, a two-component type, a room temperature curing type, or a thermosetting type curing resin.

Ship record 1. 2nd Sea/L/Do'7-S 55a, 55b
A reinforcing ring 61 for reinforcing the shield case 55 is inserted inside the solder part. In addition, the left end of the first shield case 55a in FIG. 4 is fixed to the sealing screw 37a, and the second sealing case 55b
The external power supply #! 5b is connected to the shielded wire 5c.

With the above configuration, there is no possibility of intrusion into the twisted wire core portion of the external power supply wire 5b.

Also, the intrusion of external gas at the connection part is prevented by shielding case 55. Silicone rubber 57 and heat shrink dupe 5
3 will definitely prevent it.

Therefore, according to the stranded cable according to this example, the outside air does not enter through the high frequency power supply line 5, and the discharge state and laser oscillation state are not deteriorated, and the discharge device mill (4) is not deteriorated.

In the embodiment described above, one element of the airtight means is made up of five solders, and the electric wires are also connected using the solder 59. However, the airtight means may be formed by using, for example, solder or other sealing material at a position other than the position where the electric wires are connected. The structure may be the same as that of the embodiment described above.

In short, any structure may be used as long as it blocks the passage of gas at at least one point on the core wire of the electric wire cable.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the appearance of the Rade oscillation device. FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1. FIG. 3 is a schematic cross-sectional view along the longitudinal direction of the laser oscillation device. FIG. 4 is an enlarged sectional view of a stranded cable according to an embodiment of the present invention.

Claims (2)

[Claims] (1) A stranded cable characterized in that at least a portion of the stranded core wires is provided with an airtight means that fills the gap between the stranded core wires. (2) The airtight means includes a brazing means for connecting an internal electric wire from an electrical device housed in an airtight container and an external stranded cable, a sealing member covering the outer periphery of the brazing means, and the sealing member. A stranded cable according to claim 2, comprising: a shield case that covers the stranded cable;