JP5412823B2 - Heat and water resistant electric wire for coke moving machine - Google Patents

Heat and water resistant electric wire for coke moving machine Download PDF

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JP5412823B2
JP5412823B2 JP2008320058A JP2008320058A JP5412823B2 JP 5412823 B2 JP5412823 B2 JP 5412823B2 JP 2008320058 A JP2008320058 A JP 2008320058A JP 2008320058 A JP2008320058 A JP 2008320058A JP 5412823 B2 JP5412823 B2 JP 5412823B2
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wire
braid
outer periphery
electric wire
heat
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JP2010146766A (en
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和宣 江藤
弘之 堀下
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JFE Steel Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description

本発明は、コークス移動機用耐熱耐水電線に関し、特に、コークス移動機等の高温環境で長期間安定使用可能であり、かつ、コークス移動機周辺では水洗による散水があるため耐水性も付加した、コークス移動機用耐熱耐水電線に関する。
The present invention relates to a heat-resistant and water-resistant electric wire for a coke moving machine , in particular, it can be used stably for a long time in a high-temperature environment such as a coke moving machine, and water resistance is also added because there is watering by washing around the coke moving machine. The present invention relates to a heat and water resistant electric wire for a coke moving machine .

特許文献１には、長時間の耐火試験に耐えうる高耐火特性を備えた耐火ケーブルとして、導体、耐火層、絶縁層、難燃性シースからなる耐火ケーブルの耐火層をアルミナクロスと集成マイカなどの他の耐火材との複合絶縁テープで構成したものが記載されている。
特許文献２には、可撓性、耐熱性、耐延焼性、耐水性、耐油性という条件を全て満足する不燃電線として、導体上に耐熱温度５００℃以上の無機質の可撓性絶縁層を設けて絶縁線心を形成し、この線心またはこの線心を複数本撚り合せたものをコアにして、このコアを構成する絶縁線心のそれぞれの外方に、フッ素系有機材料の押出し被覆層および無機質の可撓性外被を順次設けたものが記載されている。
特開２０００−３３１５４６号公報 特開昭６２−１０３９１２号公報 In Patent Document 1, as a fireproof cable having high fireproof characteristics that can withstand a long-term fireproof test, a fireproof layer of a fireproof cable made of a conductor, a fireproof layer, an insulating layer, and a flame retardant sheath is made of alumina cloth and laminated mica, etc. What is comprised with the composite insulating tape with other refractory materials is described.
In Patent Document 2, an inorganic flexible insulating layer having a heat resistant temperature of 500 ° C. or higher is provided on a conductor as a non-combustible wire satisfying all of the conditions of flexibility, heat resistance, fire spread resistance, water resistance, and oil resistance. Forming an insulated wire core, and using this wire core or a plurality of twisted wires as a core, an extrusion coating layer of a fluorine-based organic material is formed outside each of the insulated wire cores constituting the core. And an inorganic flexible jacket are sequentially provided.
JP 2000-331546 A JP 62-103912 A

従来、800〜1000℃程度の雰囲気に数分間さらされることが頻発するコークス移動機の周辺で使用する電線（ケーブルとも称される）は、耐熱性を考慮したものを多数使用してきているが、耐水性を考慮したものは未使用であり、熱、水、腐食性ガスによる劣化が著しく顕著となり、長期安定使用が困難となっている。
特許文献１に記載の耐火ケーブルでは、耐水性を持たせるために、シース（外被）構成材に難燃性を持たせるための添加剤を脂肪酸金属塩、シラン系カップリング剤、チタネート系カップリング剤等で処理する手段が講じられる（特許文献１の段落0018〜0019）が、コークス移動機周辺のような長期にわたる高温環境に曝されると、これら外被部材の薬剤処理により付与された耐水性能は早期に劣化して、電線の交換頻度が高くなる憂いがある。また、外被ベース材がポリマーであるため、コークス移動機からの落骸等により外被が損傷し易いという難点もある。 Conventionally, many electric wires (also called cables) used in the vicinity of a coke mobile that is frequently exposed to an atmosphere of about 800 to 1000 ° C. for several minutes have been used in consideration of heat resistance. Those considering water resistance are not used, and deterioration due to heat, water, and corrosive gas becomes remarkably remarkable, making long-term stable use difficult.
In the fireproof cable described in Patent Document 1, in order to provide water resistance, additives for imparting flame resistance to the sheath (outer sheath) constituent material include fatty acid metal salts, silane coupling agents, and titanate cups. A means for treating with a ring agent or the like is taken (paragraphs 0018 to 0019 of Patent Document 1), but when exposed to a high-temperature environment for a long time such as around a coke moving machine, it was given by chemical treatment of these jacket members. There is a concern that the water resistance will deteriorate early and the frequency of replacement of the wires will increase. In addition, since the jacket base material is a polymer, there is also a problem that the jacket is easily damaged by a fallen object from a coke moving machine.

特許文献２に記載の不燃電線は、耐水性を考慮して外被直下にフッ素系有機材料の押出し被覆層が設けられているものの、コークス移動機のような長期にわたる高温環境に曝されると、外被直下のフッ素系有機材料がその耐熱温度を超えることがあり、劣化の進行が早くて耐水性の確保が困難となって、電線の交換頻度が高くなる憂いがある。また、外被がセラミック繊維の編組で構成されているため、コークス移動機からの落骸等により外被が損傷し易いという難点もある。   Although the noncombustible electric wire described in Patent Document 2 is provided with an extrusion coating layer of a fluorine-based organic material directly under the outer casing in consideration of water resistance, when exposed to a long-term high-temperature environment such as a coke moving machine. There is a concern that the fluorine-based organic material directly under the outer casing may exceed its heat resistance temperature, the progress of deterioration is rapid, making it difficult to ensure water resistance, and the frequency of replacement of electric wires is increased. In addition, since the outer cover is formed of a braid of ceramic fibers, there is a problem in that the outer cover is easily damaged by a fallen object from a coke moving machine.

上述のように、従来の耐火性・耐水性電線は、コークス移動機のような長期にわたり高温に曝されかつ散水や落骸も受ける苛酷な環境での長期安定使用は不可能であるという課題があった。   As described above, the conventional fire-resistant and water-resistant electric wires have a problem that they cannot be used stably for a long time in a harsh environment such as a coke mover that is exposed to high temperatures for a long time and also receives water sprinkling and debris. there were.

本発明は、前記課題を解決するための手段であって、その要旨構成は以下の通りである。
（請求項１）
導体と、該導体の外周部を被覆するＰＦＡすなわちテトラフルオロエチレン‐パーフルオロアルキルビニルエーテル共重合体を用いてなるフッ素樹脂層と、該フッ素樹脂層の外周部を被覆するセラミック繊維の編組とからなる心線と、該心線の外周部を被覆するステンレス鋼素線の編組で形成した編組密度９０％以上の外被とからなることを特徴とするコークス移動機用耐熱耐水電線。
（請求項２）
導体と、該導体の外周部を被覆するＰＦＡすなわちテトラフルオロエチレン‐パーフルオロアルキルビニルエーテル共重合体を用いてなるフッ素樹脂層と、該フッ素樹脂層の外周部を被覆するセラミック繊維の編組とからなる心線と、該心線の複数本を介在と共に撚り合せてなる撚合線の外周部を被覆するセラミック繊維の編組と、前記撚合線の外周部を被覆するセラミック繊維の編組の外周部を被覆するステンレス鋼素線の編組で形成した編組密度９０％以上の外被とからなることを特徴とするコークス移動機用耐熱耐水電線。 This invention is a means for solving the said subject, Comprising: The summary structure is as follows.
(Claim 1)
A conductor, a fluororesin layer using a PFA that coats the outer periphery of the conductor, that is, a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer , and a braided ceramic fiber that covers the outer periphery of the fluororesin layer. A heat-resistant and water-resistant electric wire for a coke moving machine , comprising: a core wire; and a jacket having a braid density of 90% or more formed of a braid of stainless steel strands covering an outer peripheral portion of the core wire.
(Claim 2)
A conductor, a fluororesin layer using a PFA that coats the outer periphery of the conductor, that is, a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer , and a braided ceramic fiber that covers the outer periphery of the fluororesin layer. A cord, a braid of ceramic fibers covering the outer periphery of the twisted wire formed by interposing and twisting a plurality of the core wires, and an outer periphery of the braid of ceramic fiber covering the outer periphery of the twisted wire A heat-resistant and water-resistant electric wire for a coke moving machine, comprising a jacket having a braid density of 90% or more formed by braiding a stainless steel wire to be coated .

本発明の耐熱耐水電線（略して本発明電線）では、耐水性を確保するためのフッ素樹脂層の外周部が、セラミック繊維の編組と、ステンレス鋼素線の編組密度９０％以上の編組外被とで、二重（撚合線とした場合は三重あるいはそれ以上）に被覆されているので、コークス移動機のような長期にわたる高温環境に曝されても、フッ素樹脂がその耐熱温度を超え難い。また、外被をステンレス鋼素線の編組密度９０％以上の編組で形成したので、落骸等を受けても損傷し難い。したがって、本発明によれば、コークス移動機のような長期にわたり高温に曝されかつ散水や落骸も受ける苛酷な環境中でも、電線の長期安定使用が可能となる。また、外被がステンレス鋼素線の編組密度９０％以上の編組で形成されているため、電線管やフレキ管などの保護管を使用せず裸線のまま布設することが可能であり、それゆえ、付帯費を低減できるという効果や、本発明電線からの異常信号検出時に即座に目視で外傷を確認できて故障復旧時間を短縮できるという効果もある。   In the heat-resistant and water-resistant electric wire of the present invention (abbreviated as the electric wire of the present invention), the outer peripheral portion of the fluororesin layer for ensuring water resistance is a braided jacket having a braid density of 90% or more of braided ceramic fibers and stainless steel strands Because it is coated in double (triple or more when twisted wire is used), the fluororesin is unlikely to exceed its heat resistance even when exposed to long-term high-temperature environments such as coke movers. . Further, since the outer jacket is formed of a braid of stainless steel strands with a braid density of 90% or more, it is difficult to be damaged even if it receives a fallen object or the like. Therefore, according to the present invention, it is possible to stably use the electric wire for a long period of time even in a harsh environment such as a coke moving machine that is exposed to a high temperature for a long period of time and is also sprinkled and debris. In addition, since the outer sheath is formed of braid of stainless steel strands with a braid density of 90% or more, it is possible to lay the bare wire without using a protective tube such as a conduit tube or a flexible tube. Therefore, there is an effect that the incidental cost can be reduced, and an effect that the fault recovery time can be shortened by instantly confirming the visual damage when detecting the abnormal signal from the electric wire of the present invention.

図１は、本発明電線の心線が１本の場合（１芯型）の１例を示す断面模式図である。この例は、導体１の外周部にフッ素樹脂層２を形成し、該フッ素樹脂層の外周部をセラミック繊維の編組３で被覆して心線10を形成し、該心線10の外周部をステンレス鋼素線の編組で形成した編組密度９０％以上の外被４で被覆したものである。
図２は、本発明電線の心線が２本の場合（２芯型）の１例を示す断面模式図である。この例は、導体１の外周部にフッ素樹脂層２を形成し、該フッ素樹脂層の外周部をセラミック繊維の編組3Aで被覆して心線10を形成し、２本の心線10A,10Bを介在５と共に撚り合せて撚合線11となし、該撚合線11の外周部を被覆するセラミック繊維の編組3Bと、該セラミック繊維の編組3Bの外周部をステンレス鋼素線の編組で形成した編組密度９０％以上の外被４で被覆したものである。 FIG. 1 is a schematic cross-sectional view showing an example when the number of core wires of the electric wire of the present invention is one (one-core type). In this example, a fluororesin layer 2 is formed on the outer periphery of the conductor 1, the outer periphery of the fluororesin layer is covered with a braid 3 of ceramic fibers to form a core wire 10, and the outer periphery of the core wire 10 is It is covered with a jacket 4 formed of a braid of stainless steel wire and having a braid density of 90% or more.
FIG. 2 is a schematic cross-sectional view showing an example of the case where the core wire of the electric wire of the present invention is two (two-core type). In this example, a fluororesin layer 2 is formed on the outer periphery of the conductor 1, the outer periphery of the fluororesin layer is covered with a ceramic fiber braid 3A to form a core wire 10, and two core wires 10A, 10B Is twisted together with the interposition 5 to form a stranded wire 11, and the braid 3B of the ceramic fiber covering the outer periphery of the stranded wire 11 and the outer periphery of the braid 3B of the ceramic fiber are formed of a braid of stainless steel strands. The outer cover 4 having a braid density of 90% or more is coated.

導体としては、ニッケル線、銅線、ニッケル被覆銅線などが挙げられる。
フッ素樹脂としては、十分な疎水性を有し、耐熱温度が比較的高く、かつ、熱可塑性を有して押出成形による電線被覆加工用に適するという点から、ＰＦＡすなわちテトラフルオロエチレン‐パーフルオロアルキルビニルエーテル共重合体が好適である。
セラミック繊維としては、例えばＡｌ２Ｏ３を主成分とし、ＳｉＯ２，Ｂ２Ｏ３，Ｆｅ２Ｏ３等を含有したセラミック長繊維が好ましい。なお、本発明電線の製造過程において、セラミック繊維の編組を形成した後、該編組に耐熱ワニスを塗布し焼き付け乾燥処理を行うのが好ましい。 Examples of the conductor include a nickel wire, a copper wire, and a nickel-coated copper wire.
As a fluororesin, PFA, that is, tetrafluoroethylene-perfluoroalkyl, has sufficient hydrophobicity, has a relatively high heat resistance temperature, and has thermoplasticity and is suitable for wire coating processing by extrusion molding. Vinyl ether copolymers are preferred.
As the ceramic fiber, for example, a ceramic long fiber containing Al 2 O 3 as a main component and containing SiO 2 , B 2 O 3 , Fe 2 O 3 or the like is preferable. In the production process of the electric wire of the present invention, it is preferable that after forming a braid of ceramic fibers, a heat-resistant varnish is applied to the braid and baked and dried.

介在としては、例えばガラス繊維が挙げられる。
外被をなすステンレス鋼素線は、その編組密度が９０％に満たないと、電線を落骸等による損傷から保護することが困難であるため、編組密度が９０％以上となるように編組する必要がある。ステンレス鋼素線の鋼種としては、ＳＵＳの３０４，３０２Ｂ，３０９，３１０，ＸＭ１５Ｊ１，４１０Ｓ，４３０，４４６などが挙げられる。 Examples of the interposition include glass fiber.
If the braid density is less than 90%, it is difficult to protect the electric wire from damage caused by falling bodies, etc., so that the braid density is 90% or more. There is a need. Examples of the stainless steel strand include SUS 304, 302B, 309, 310, XM15J1, 410S, 430, 446, and the like.

以下、実施例を挙げて本発明をさらに詳しく説明する。
この実施例では、図２に示した断面形状の本発明電線（２芯型）を製作した。該製作にあたり、導体１は、直径０．２６ｍｍのニッケル被覆銅線（２８Ｎｉ）２４本を適当なピッチで撚り合せたものを使用し、フッ素樹脂層２は、導体１外周部にＰＦＡを押出成形被覆することにより形成した。該形成した成品の外周部に、Ａｌ２Ｏ３を主成分とし、ＳｉＯ２，Ｂ２Ｏ３，Ｆｅ２Ｏ３等を含有したセラミック長繊維からなるセラミック糸で一重の編組3Aを形成し、該編組3Aに耐熱ワニスを塗布し焼き付け乾燥処理を行って外径３．１ｍｍの２本の心線10A,10Bを得た。これらの心線10A,10Bを、ガラス繊維からなる介在５と共に撚り合せて２芯型の撚合線11となし、該撚合線11の外周部に前記と同種のセラミック糸で一重の編組3Bを形成し、該編組3Bに耐熱ワニスを塗布し焼き付け乾燥処理を行い、該乾燥後の編組3Bの外周部に直径０．１２ｍｍのＳＵＳ３０４ステンレス鋼素線で編組密度９０％以上の密な編組を形成して外径７．６ｍｍの本実施例電線を得た。 Hereinafter, the present invention will be described in more detail with reference to examples.
In this example, the inventive electric wire (two-core type) having the cross-sectional shape shown in FIG. 2 was produced. In the production, the conductor 1 is made of 24 nickel-coated copper wires (28Ni) having a diameter of 0.26 mm twisted at an appropriate pitch, and the fluororesin layer 2 is formed by extruding PFA on the outer periphery of the conductor 1. It was formed by coating. A single braid 3A is formed on the outer periphery of the formed product with ceramic yarns composed of ceramic long fibers containing Al 2 O 3 as a main component and containing SiO 2 , B 2 O 3 , Fe 2 O 3, etc. A heat-resistant varnish was applied to the braid 3A and baked and dried to obtain two core wires 10A and 10B having an outer diameter of 3.1 mm. These core wires 10A and 10B are twisted together with an intervening 5 made of glass fiber to form a two-core twisted wire 11, and a single braid 3B is formed on the outer periphery of the twisted wire 11 with the same kind of ceramic yarn as described above. A heat-resistant varnish is applied to the braid 3B and baked and dried. A dense braid having a braid density of 90% or more is formed on the outer periphery of the braid 3B after drying with a SUS304 stainless steel wire having a diameter of 0.12 mm. This example electric wire having an outer diameter of 7.6 mm was obtained.

本実施例電線の電気的特性に関して、導体抵抗、耐電圧値は、通常の耐熱電線と大差なく、コークス移動機用ケーブルとして問題なく使用可能である。
本実施例電線は、本発明者らが所属する製鉄所のコークス工場において、ガイド車リフター（コークス移動機に類する）周りのセンサ行きケーブルに適用され、また、装炭車にも適用された。本実施例電線の適用前は、通常の耐熱電線（図３に例示）を用いており、高温・散水・落骸等の苛酷な使用環境下で、半年程度で劣化断線していたが、本実施例電線の適用後は、２〜３年もの長期安定使用が可能となった。 Regarding the electrical characteristics of the electric wire of this example, the conductor resistance and the withstand voltage value are not much different from those of a normal heat-resistant electric wire, and can be used without any problem as a cable for a coke moving machine.
The electric wire of this example was applied to a cable for a sensor around a guide car lifter (similar to a coke moving machine) in a coke factory of an iron mill to which the present inventors belong, and also applied to a coal-equipped car. Prior to the application of this example wire, a normal heat-resistant wire (illustrated in Fig. 3) was used, and under severe usage conditions such as high temperature, water sprinkling, and debris, the wire was deteriorated in about six months. After application of the example wire, long-term stable use of 2-3 years became possible.

本発明電線の心線が１本の場合（１芯型）の１例を示す断面模式図Cross-sectional schematic diagram showing an example of the case where the core wire of the present invention has one core (single-core type) 本発明電線の心線が２本の場合（２芯型）の１例を示す断面模式図Cross-sectional schematic diagram showing an example of the case where there are two core wires of the electric wire of the present invention (two-core type) 通常の耐熱電線の１例を示す断面模式図Cross-sectional schematic diagram showing an example of a normal heat-resistant electric wire

符号の説明Explanation of symbols

１ 導体
２ フッ素樹脂層
３，3A，3B セラミック繊維の編組
４ ステンレス鋼素線の編組で形成した編組密度９０％以上の外被
５ 介在
10，10A，10B 心線
11 撚合線 DESCRIPTION OF SYMBOLS 1 Conductor 2 Fluororesin layer 3, 3A, 3B Ceramic fiber braid 4 Outer jacket 5 of braid density of 90% or more formed by braiding stainless steel wire
10, 10A, 10B core wire
11 Twisted wire

Claims (2)

導体と、該導体の外周部を被覆するＰＦＡすなわちテトラフルオロエチレン‐パーフルオロアルキルビニルエーテル共重合体を用いてなるフッ素樹脂層と、該フッ素樹脂層の外周部を被覆するセラミック繊維の編組とからなる心線と、該心線の外周部を被覆するステンレス鋼素線の編組で形成した編組密度９０％以上の外被とからなることを特徴とするコークス移動機用耐熱耐水電線。 A conductor, a fluororesin layer using a PFA that coats the outer periphery of the conductor, that is, a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer , and a braided ceramic fiber that covers the outer periphery of the fluororesin layer. A heat-resistant and water-resistant electric wire for a coke moving machine , comprising: a core wire; and a jacket having a braid density of 90% or more formed of a braid of stainless steel strands covering an outer peripheral portion of the core wire. 導体と、該導体の外周部を被覆するＰＦＡすなわちテトラフルオロエチレン‐パーフルオロアルキルビニルエーテル共重合体を用いてなるフッ素樹脂層と、該フッ素樹脂層の外周部を被覆するセラミック繊維の編組とからなる心線と、該心線の複数本を介在と共に撚り合せてなる撚合線の外周部を被覆するセラミック繊維の編組と、前記撚合線の外周部を被覆するセラミック繊維の編組の外周部を被覆するステンレス鋼素線の編組で形成した編組密度９０％以上の外被とからなることを特徴とするコークス移動機用耐熱耐水電線。 A conductor, a fluororesin layer using a PFA that coats the outer periphery of the conductor, that is, a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer , and a braided ceramic fiber that covers the outer periphery of the fluororesin layer. A cord, a braid of ceramic fibers covering the outer periphery of the twisted wire formed by interposing and twisting a plurality of the core wires, and an outer periphery of the braid of ceramic fiber covering the outer periphery of the twisted wire A heat-resistant and water-resistant electric wire for a coke moving machine, comprising a jacket having a braid density of 90% or more formed by braiding a stainless steel wire to be coated.
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JP2013157259A (en) * 2012-01-31 2013-08-15 Yokogawa Denshikiki Co Ltd Heat-resistant electric wire
CN103226998A (en) * 2012-12-26 2013-07-31 嘉兴市天信电线有限公司 Special cable for electric vehicle
KR101459112B1 (en) * 2013-08-30 2014-11-07 제이에스전선 주식회사 Fire resistance cable
CN104392782A (en) * 2014-11-27 2015-03-04 江苏红峰电缆集团有限公司 Reinforced waterproof cable
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