JPS6093776A - Connection device for sheath type measurement wire - 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 invention] The present invention relates to a device for connecting sheath type h1 survey lines.

[Technical Background of the Invention] Thermal lightning pairs, cables, etc. used in high-temperature atmospheres such as the M1 system inside a nuclear reactor are sheathed measurement wires using mineral insulating material, so-called M1 cables. . This M1
The cable is generally constructed as shown in FIGS. 1 and 2. That is, in the figure, 1 is a metal sheath, and inside this sheath 1, core wires 2a and 2b are housed. The sheath 1 is filled with an insulating material 3 made of powder such as magnesium oxide or aluminum oxide. The core wires 2a, 2b are held in predetermined positions by the insulating material 3, and the core wires 2a, 2b are held in predetermined positions.
A, 2b and the sheath 1 are electrically insulated.

Since the insulating material of such an Ml cable is a mineral material, it has high heat resistance, high durability, and high reliability.

[Problems with Background Art] However, since the above-mentioned Ml cable is not flexible, it cannot be bent on site during installation, and therefore installation is troublesome. Especially in the in-core instrumentation system of a nuclear reactor, this M
The cables had to be placed in a narrow and complicated space, making the installation extremely difficult. In order to eliminate such problems, there has been a demand for the development of a connecting device that can divide the sheathed measurement wire into a plurality of parts and connect them on-site. However, if the sheath type measurement wire is divided, water vapor etc. will enter from the outside into the ends and connections, impairing the insulation properties and causing deterioration of the insulating material, resulting in problems such as reduced durability. Developing such a connecting device has been difficult.

(Object of the Invention) The present invention has been made based on the above circumstances, and its purpose is to enable the sheathed measurement wire to be freely connected, and to improve the heat resistance and durability of the sheathed measurement wire. It is an object of the present invention to provide a connection device for sheath type measurement wires that does not damage the performance.

[Summary of the invention]

That is, the present invention includes a collar welded to the outer periphery of the sheath at the end of the L measurement line to the sheath type to be connected, a sleeve welded to the outer periphery of these collars, and a sheath type measurement device installed inside this sleeve. an insulator that insulates the core wire of the wire;
A gas exhaust hole is formed in the sleeve and sealed after exhausting the gas inside the sleeve. Therefore, the sheath type measurement line can be connected freely, making it easy to install the sheath type measurement line, and after the connection is made, the connection part is heated to release the internal aquatic liquid and other gases from the gas exhaust hole of the sleeve. If the exhaust hole is then sealed by welding, etc., a complete airtight seal can be obtained, and since the internal gas such as water vapor will be exhausted, the heat resistance and durability of the sheathed measurement wire may be impaired. There is no such thing.

[Embodiments of the invention]

Hereinafter, the present invention will be explained in detail with reference to FIGS. 3 to 5. FIG. 3 shows a first embodiment of the present invention, in which 10
is a sheathed measurement line, for example a sheathed thermal lightning pair,
11 is its sheath, and 12a and 12b are core wires. A cylindrical collar 15 is welded to the outer periphery of the sheath 11 at the connecting end of each of these thermal lightning pairs 10 in an airtight manner. A cylindrical sleeve 16 is slidably fitted around the outer periphery of these collars 15, and both ends of this sleeve 16 are hermetically welded to the outer periphery of the collar 15. Therefore, the thermal lightning pair 10 is mechanically connected by the collar 15a3 and the sleeve 16. Note that 18, 19, 20, and 21 are welded parts. In addition, a protector 1 is attached to the tip of the collar 15.
7 are welded to each other to protect the welded portion 18 between the collar 15 and the sheath 11. The core wires 12a and 12b of the thermocouple 10 are drawn out from within the sheath 11, and are welded together within the sleeve 16 to be electrically connected. Further, an insulator 22 and an insulating plug 23 made of a heat-resistant and electrically insulating material are attached to the end of the thermocouple 10, and an insulator 24 is housed in the sleeve 16. , an insulating plug 23, and an insulator 24 electrically insulate the core wires 12a and 12b. Further, a gas exhaust hole 26 is formed in the sleeve 16, and after welding the sleeve 16, etc., this joint is heated, and gas such as water vapor inside the sleeve 16 is exhausted from the gas exhaust hole 26. The gas exhaust hole 26 is later sealed by welding or the like to form a hermetic seal.

In the first embodiment of the present invention configured as described above, collars 15 are first welded to the ends of the thermocouples 10 to be connected, one thermocouple 10 is inserted through the sleeve 16, and the thermocouples 10 are inserted into the sleeve 16. with the ends facing each other.

After attaching the insulator 22, the insulating plug 23, and the insulator 24, the core wires 12a and 12b are pulled out from the sheath 11.
are welded together. Next, the sleeve 16 is slid and both ends thereof are fitted onto the outer periphery of the collar 15, and both ends of the sleeve 16 are welded to the outer periphery of the collar 15. Then, this entire connection is heated with a burner or the like, and gas such as water vapor inside is discharged from the gas exhaust hole 26. After this waste is discharged, the gas exhaust hole 26 is sealed by welding or the like to complete a complete airtight seal. .

Further, FIG. 4 shows @2 embodiment of the present invention.

This second embodiment is for connecting a coaxial M1 cable 10, where 11 is a sheath and 12 is a core wire.

In this device, collars 30 are welded to each sheath 11, a sleeve 33 is welded to the outer periphery of these collars 30, and the core wire 12 drawn out from the sheath 11 is electrically connected with the connecting sleeve 31. In addition, 32 is an insulator, 36
is a gas exhaust hole. Moreover, 34.35 is a welding part.

Furthermore, FIG. 5 shows a third embodiment of the present invention.

This third embodiment is for the case where a two-core Ml cable 10 is connected. That is, collars 41 are welded to the outer circumferences of the sheaths 11 of the Ml cable 10, and sleeves 42 similar to those in the previous embodiment are welded to the outer circumferences of these collars 41. And the core I pulled out from the sheath 11! 1112a, 12b are electrically connected by a connecting foil 44.44. Further, the sleeve 42 has gas exhaust holes 4 similar to those in the embodiment described above.
9 is formed. Note that 46, 47, and 48 are welded parts, 43 is an insulating plug, and 45 is an insulator.

〔Effect of the invention〕

As described above, the present invention includes a collar welded to the outer periphery of the sheath of the 08 section of a sheathed measurement wire such as a ~II cable to be connected, a sleeve welded to the outer periphery of these collars,
An insulator provided in the sleeve to insulate the core wire of the sheathed measurement wire, and a gas exhaust hole formed in the sleeve and sealed after exhausting knocks inside the sleeve f. It is. Therefore, the sheathed measurement wire can be connected freely, making it easy to install the sheathed measurement wire, and after the connection is made, the connection part is heated and the internal water vapor and other gases are discharged from the gas exhaust hole of the sleeve. However, if this exhaust hole is then sealed by welding etc., it will be completely sealed, and the internal gas such as water vapor will be exhausted, so the heat resistance and durability of this sheath type measurement wire will not be impaired. The effect in etc. is people.

[Brief explanation of the drawing]

Figures 1 and 2 show the configuration of the sheath type bar 1 line,
FIG. 1 is a longitudinal cross-sectional view, and FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG. FIG. 3 is a longitudinal cross-sectional view of the first embodiment of the present invention;
FIG. 4 is a longitudinal sectional view of the second embodiment, and FIG. 5 is a longitudinal sectional view of the third embodiment. 11-... Sheath, 12a, 12b... Core wire, 15° 30.41... Collar, 16.33.42... Sleeve, 2'4.32.45... Insulator, 25.36 ．．
49...Gas exhaust hole. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A collar welded to the outer periphery of the sheath at the end of the sheathed measurement wire to be connected, a sleeve welded to the outer periphery of these collars, and an insulation provided within this sleeve to insulate the core wire of the sheathed measurement wire. 1. A sheath type measurement wire connection device, comprising: a body; and a gas exhaust hole formed in the sleeve and sealed after exhausting gas inside the sleeve.