JP2000228117A - Signal cable for high temperature - Google Patents

Signal cable for high temperature

Info

Publication number
JP2000228117A
JP2000228117A JP11030781A JP3078199A JP2000228117A JP 2000228117 A JP2000228117 A JP 2000228117A JP 11030781 A JP11030781 A JP 11030781A JP 3078199 A JP3078199 A JP 3078199A JP 2000228117 A JP2000228117 A JP 2000228117A
Authority
JP
Japan
Prior art keywords
silica gel
diameter
metallic sheath
stainless steel
steel pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP11030781A
Other languages
Japanese (ja)
Other versions
JP2991712B1 (en
Inventor
Mitsuaki Mochizuki
光明 望月
Shiro Kyohara
志郎 鏡原
Shigeo Wakamori
茂夫 若森
Kazuhiko Yaguchi
和彦 矢口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Silysia Chemical Ltd
Okazaki Manufacturing Co Ltd
Original Assignee
Fuji Silysia Chemical Ltd
Okazaki Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Silysia Chemical Ltd, Okazaki Manufacturing Co Ltd filed Critical Fuji Silysia Chemical Ltd
Priority to JP11030781A priority Critical patent/JP2991712B1/en
Application granted granted Critical
Publication of JP2991712B1 publication Critical patent/JP2991712B1/en
Publication of JP2000228117A publication Critical patent/JP2000228117A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Insulated Conductors (AREA)
  • Communication Cables (AREA)

Abstract

PROBLEM TO BE SOLVED: To manufacture a signal cable capable of keeping a high insulation resistance value at high temperatures by using a silica gel manufactured from an aqueous solution containing sodium silicate as a raw material for an inorganic insulation material filled in a metallic sheath. SOLUTION: A member composed by filling an inorganic insulation material 2 of silica gel powder in a metallic sheath 1 of a stainless steel pipe having an inside diameter of 10 mm and an outside diameter of 13 mm so as to position a wire 3 having a wire diameter of 1.6 mm at the center is drawn to reduce its diameter until the outside diameter of the outside metallic sheath 1 of the stainless steel pipe reaches 1.6 mm, so that the filling density of the inorganic insulator 2 of the silica gel powder material inside the metallic sheath 1 of the stainless steel pipe is increased. The silica gel used in this case is formed by reducing and uniformly adjusting each diameter of fine holes of a silica gel provided by neutralizing sodium silicate with sulfuric acid by passing heated steam at 100-1000 deg.C through it in an autoclave. Thus, an insulation property of 102 Ω is improved by the use of the inorganic insulation material 2 provided by increasing the degree of porosity of pores of the silica gel, so that a resistance value of 107 Ωat 1000 deg.C can be provided.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、産業上利用する熱
機器、装置における測定や制御に使用する信号ケーブル
に関するものであり、詳しくは信号ケーブルの高温雰囲
気での電気的絶縁性を改善したものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal cable used for measurement and control in industrially used thermal equipment and equipment, and more particularly to a signal cable having improved electrical insulation in a high-temperature atmosphere. It is.

【0002】[0002]

【従来の技術】従来のMIケーブルまたはシース熱電対
にあっては、金属製シース内に充填する無機絶縁材はシ
リカ、マグネシアまたはアルミナなどの鉱物を機械的に
粉砕し、適当に篩分して粒度調整したものが用いられて
きた。
2. Description of the Related Art In a conventional MI cable or sheath thermocouple, an inorganic insulating material to be filled in a metal sheath is obtained by mechanically pulverizing a mineral such as silica, magnesia or alumina, and sieving it appropriately. Particle size-adjusted ones have been used.

【0003】[0003]

【発明が解決しようとする課題】金属製シース内に無機
絶縁材を介在させて電気的に絶縁した信号ケーブルを5
00℃以上の高温雰囲気中で使用した場合、絶縁層の絶
縁抵抗値が低下し、微弱な信号電流の漏洩をもたらし、
熱電対の例では微弱な起電力電流を漏洩することで、検
出された温度は真の温度とは異なるものとなる。
SUMMARY OF THE INVENTION A signal cable which is electrically insulated by interposing an inorganic insulating material in a metal sheath has been developed.
When used in a high-temperature atmosphere of 00 ° C. or higher, the insulation resistance of the insulating layer decreases, resulting in weak signal current leakage.
In the example of the thermocouple, the leaked weak electromotive current causes the detected temperature to be different from the true temperature.

【0004】そこで、高温下での絶縁性能の低下を来す
ことのない無機絶縁材を高純度の電融マグネシアを求め
るなど改善が試みられているが、さらに高い1000℃
以上の高温雰囲気での正確な温度測定の要求には、より
高純度の無機絶縁材を求める必要があり、高価なものと
なる。無機絶縁材の粒度調整を行い最密充填を試みるな
どしたが、高温雰囲気下での絶縁低下の解決には未だ至
らなかった。
[0004] In order to solve this problem, attempts have been made to improve the inorganic insulating material that does not cause a decrease in insulating performance at high temperatures, for example, by seeking high-purity fused magnesia.
The above demand for accurate temperature measurement in a high-temperature atmosphere requires a higher-purity inorganic insulating material, which is expensive. Attempts were made to adjust the particle size of the inorganic insulating material to achieve close packing, but this has not yet been solved to solve the problem of insulation deterioration in a high-temperature atmosphere.

【0005】[0005]

【課題を解決するための手段】そこで、本発明は、上記
の事情に鑑み、金属製シース内に充填する無機絶縁材は
機械的に粉砕したものに代わって、珪酸ソーダを原料と
する水溶液から製造したシリカゲルを用いたことで、高
温度における高い絶縁抵抗値を保つ信号ケーブルを製造
することができた。
In view of the above circumstances, the present invention has been made in view of the above circumstances. Instead of mechanically pulverized inorganic insulating material filled in a metallic sheath, the present invention uses an aqueous solution containing sodium silicate as a raw material. By using the manufactured silica gel, a signal cable that maintains a high insulation resistance value at a high temperature could be manufactured.

【0006】ここで、用いるシリカゲルは電気絶縁性を
向上するためにシリカゲル粒子の気孔の多孔度合の大き
い細孔径が80〜1000Åになるように加熱水蒸気処
理したものを用いた。
Here, the silica gel used was heated and steamed so that the pore diameter of the pores of the silica gel particles was 80 to 1000 ° in order to improve the electrical insulation.

【0007】[0007]

【発明の実施の態様】本発明を添付する図面に示す具体
的な実施例に基づいて、以下詳細に説明する。図1にお
いて、内径10mm、外径13mmのステンレス鋼管の
金属製シース1内に、線径1.6mmの導線3を中心に
位置するように、シリカゲル粉材の無機絶縁材2を充填
したものを、外側のステンレス鋼管の金属シース1の外
径が1.6mmに達するまでスウエンジング・マシンに
よって絞り減径して、該ステンレス鋼管の金属シース1
内部のシリカゲル粉材の無機絶縁材2の充填密度を稠密
にした。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on specific embodiments shown in the accompanying drawings. In FIG. 1, a metal sheath 1 of a stainless steel tube having an inner diameter of 10 mm and an outer diameter of 13 mm filled with an inorganic insulating material 2 of silica gel powder so as to be centered on a conducting wire 3 having a wire diameter of 1.6 mm. Then, the outer diameter of the metal sheath 1 of the stainless steel pipe is reduced by a swaging machine until the outer diameter of the metal sheath 1 reaches 1.6 mm.
The packing density of the inorganic insulating material 2 of the silica gel powder inside was made dense.

【0008】上記の如くして得たMIケーブルを長さ1
00mmに裁断し、ステンレス鋼管の金属シース1内部
に収容した導線3と、外側のステンレス鋼管の金属シー
ス1との間の電気抵抗の測定を炉中で100℃ずつ温度
を上昇しつつ行った。上述の方法により充填した無機絶
縁材の絶縁抵抗を測定することが、MIケーブルまたは
シース熱電対の実際の使用に当たって最も適した方法と
して採用されてきた。
The MI cable obtained as described above has a length of 1
The electric resistance between the conductive wire 3 cut into 00 mm and accommodated inside the metal sheath 1 of the stainless steel pipe and the metal sheath 1 of the outer stainless steel pipe was measured while increasing the temperature by 100 ° C. in a furnace. Measuring the insulation resistance of the inorganic insulation filled by the method described above has been adopted as the most suitable method for actual use of the MI cable or the sheath thermocouple.

【0009】ここで用いるシリカゲルは、珪酸ソーダを
硫酸で以て中和して得たシリカゲルを、オートクレイブ
中で100〜1000℃の加熱水蒸気を通じて細孔径を
細く均一に調整したものを用いた。図2に高温用信号ケ
ーブルの単一の導線を金属シース内に収容した状態を示
す。図3には高温用信号ケーブルの複数本(2本)の導
線を金属シース内に収容した状態を示す。
As the silica gel used here, silica gel obtained by neutralizing sodium silicate with sulfuric acid and having a fine and uniform pore diameter adjusted by heating steam at 100 to 1000 ° C. in an autoclave was used. FIG. 2 shows a state in which a single conductor of the high-temperature signal cable is accommodated in a metal sheath. FIG. 3 shows a state in which a plurality (two) of the high-temperature signal cables are accommodated in a metal sheath.

【0010】[0010]

【発明の効果】本発明は、上述のように、金属製シース
内に無機絶縁材を介在させて導線または熱電対素線を収
容し、金属シース外径を絞り減径させた高温用信号ケー
ブルであって、前記無機絶縁材を多孔性のシリカゲルと
した高温用信号ケーブルであり、MIケーブルまたはシ
ース熱電対において電融マグネシアの純製したものを充
填したものであっても、100mmの切片につき100
0℃で電気抵抗値が10 5 Ωの程度しか達し得なかった
が、本発明におけるシリカゲルの気孔の多孔度合を大き
くした無機絶縁材の使用により、102 Ω絶縁性を向上
し、1000℃で107 Ωとする結果を得たことで、高
温で使用するMIケーブルまたはシース熱電対の高温用
信号ケーブルとして正確度を増し、使用範囲が広がっ
た。
According to the present invention, as described above, a metal sheath is provided.
A conductor or thermocouple wire with an inorganic insulating material
High-temperature signal cable with reduced outer diameter of metal sheath
Wherein the inorganic insulating material is made of porous silica gel.
High temperature signal cable, MI cable or cable.
Use a thermocouple made of pure fused magnesia
100 mm per 100 mm section
Electric resistance is 10 at 0 ° C FiveCould only reach the order of Ω
Increase the porosity of the pores of the silica gel in the present invention.
10TwoImproved Ω insulation
And at 1000 ° C for 107Ω results in high
High temperature of MI cable or sheath thermocouple used at high temperature
Increased accuracy as a signal cable and expanded use range
Was.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の高温用信号ケーブルの単一の導線を金
属シース内に収容した状態を示す断面図である。
FIG. 1 is a cross-sectional view showing a state in which a single conductive wire of a high-temperature signal cable of the present invention is accommodated in a metal sheath.

【図2】本発明の高温用信号ケーブルの単一の導線を金
属シース内に収容した状態を示す斜視図である。
FIG. 2 is a perspective view showing a state where a single conductor of the high-temperature signal cable of the present invention is accommodated in a metal sheath.

【図3】本発明の高温用信号ケーブルの複数本(2本)
の導線を金属シース内に収容した状態を示す斜視図であ
る。
FIG. 3 shows a plurality (two) of high-temperature signal cables of the present invention.
FIG. 4 is a perspective view showing a state where the lead wire is accommodated in a metal sheath.

【符号の説明】[Explanation of symbols]

1…金属製シース 2…無機絶縁材 3…導線 DESCRIPTION OF SYMBOLS 1 ... Metal sheath 2 ... Inorganic insulating material 3 ... Conductor

───────────────────────────────────────────────────── フロントページの続き (72)発明者 鏡原 志郎 明石市貴崎5丁目6番28号 株式会社岡崎 製作所内 (72)発明者 若森 茂夫 愛知県春日井市高蔵寺町2丁目1846番地 富士シリシア化学株式会社内 (72)発明者 矢口 和彦 愛知県春日井市高蔵寺町2丁目1846番地 富士シリシア化学株式会社内 Fターム(参考) 5G309 LA07 PA02 5G313 AB09 AC02 AC07 AD08 AE07 AE08 5G315 CA02 CB02 CB06 CC08 CD17 5G319 AA03  ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shiro Kagamihara 5-6-28 Kisaki, Akashi-shi Okazaki Manufacturing Co., Ltd. (72) Inventor Shigeo Wakamori 2- 1846 Kozoji-cho, Kasugai-shi, Aichi Prefecture Fuji Silysia Chemical Ltd. (72) Inventor Kazuhiko Yaguchi 2- 1846 Kozoji-cho, Kasugai-shi, Aichi F-term in Fuji Silysia Chemical Co., Ltd. 5G309 LA07 PA02 5G313 AB09 AC02 AC07 AD08 AE07 AE08 5G315 CA02 CB02 CB06 CC08 CD17 5G319 AA03

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 金属製シース内に無機絶縁材を介在させ
て導線または熱電対素線を収容し、金属シース外径を絞
り減径させた高温用信号ケーブルであって、前記無機絶
縁材を多孔性のシリカゲルとしたことを特徴とする高温
用信号ケーブル。
1. A high-temperature signal cable in which a conductive wire or a thermocouple wire is accommodated in a metal sheath with an inorganic insulating material interposed therebetween, and the outer diameter of the metal sheath is reduced and reduced. High-temperature signal cable made of porous silica gel.
JP11030781A 1999-02-09 1999-02-09 High temperature signal cable Expired - Fee Related JP2991712B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11030781A JP2991712B1 (en) 1999-02-09 1999-02-09 High temperature signal cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11030781A JP2991712B1 (en) 1999-02-09 1999-02-09 High temperature signal cable

Publications (2)

Publication Number Publication Date
JP2991712B1 JP2991712B1 (en) 1999-12-20
JP2000228117A true JP2000228117A (en) 2000-08-15

Family

ID=12313231

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11030781A Expired - Fee Related JP2991712B1 (en) 1999-02-09 1999-02-09 High temperature signal cable

Country Status (1)

Country Link
JP (1) JP2991712B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100403453C (en) * 2006-04-30 2008-07-16 王远云 Electric silica gel sheath
JP5126563B1 (en) * 2012-03-23 2013-01-23 株式会社岡崎製作所 MI cable with terminal sleeve that does not disturb the magnetic field and is not affected by the magnetic field
JP2013164375A (en) * 2012-02-13 2013-08-22 National Institute Of Advanced Industrial & Technology Heat-proof pressure-resistant corrosion resistance microelectrode
CN104934163A (en) * 2015-06-09 2015-09-23 铜陵华洋特种线材有限责任公司 Preparation method for high permeability electric appliance wire harness

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110221392A (en) * 2019-06-14 2019-09-10 深圳市特发信息光电技术有限公司 One kind resisting micro-bend metal pipe optical cable

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100403453C (en) * 2006-04-30 2008-07-16 王远云 Electric silica gel sheath
JP2013164375A (en) * 2012-02-13 2013-08-22 National Institute Of Advanced Industrial & Technology Heat-proof pressure-resistant corrosion resistance microelectrode
JP5126563B1 (en) * 2012-03-23 2013-01-23 株式会社岡崎製作所 MI cable with terminal sleeve that does not disturb the magnetic field and is not affected by the magnetic field
WO2013140462A1 (en) * 2012-03-23 2013-09-26 株式会社岡崎製作所 Mi cable with terminal sleeve which does not disturb magnetic field and is not influenced by magnetic field
US8981215B2 (en) 2012-03-23 2015-03-17 Okazaki Manufacturing Company Termination sleeve-equipped MI cable that does not disturb and is not affected by magnetic field
CN104934163A (en) * 2015-06-09 2015-09-23 铜陵华洋特种线材有限责任公司 Preparation method for high permeability electric appliance wire harness

Also Published As

Publication number Publication date
JP2991712B1 (en) 1999-12-20

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