JPH0227769B2 - SHOKOCHUUBUNOSEIZOHO - Google Patents
SHOKOCHUUBUNOSEIZOHOInfo
- Publication number
- JPH0227769B2 JPH0227769B2 JP6376984A JP6376984A JPH0227769B2 JP H0227769 B2 JPH0227769 B2 JP H0227769B2 JP 6376984 A JP6376984 A JP 6376984A JP 6376984 A JP6376984 A JP 6376984A JP H0227769 B2 JPH0227769 B2 JP H0227769B2
- Authority
- JP
- Japan
- Prior art keywords
- arc
- extinguishing
- press
- tube
- mold
- 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.)
- Expired - Lifetime
Links
- 239000003795 chemical substances by application Substances 0.000 claims description 28
- 238000004519 manufacturing process Methods 0.000 claims description 12
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 11
- 239000004327 boric acid Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 238000011049 filling Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 239000010425 asbestos Substances 0.000 claims description 8
- 229910052895 riebeckite Inorganic materials 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 7
- 239000002655 kraft paper Substances 0.000 claims description 7
- 229920000609 methyl cellulose Polymers 0.000 claims description 6
- 239000001923 methylcellulose Substances 0.000 claims description 6
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 239000000123 paper Substances 0.000 claims description 4
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 16
- 238000010791 quenching Methods 0.000 description 7
- 235000010981 methylcellulose Nutrition 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Fuses (AREA)
Description
【発明の詳細な説明】
この発明は高圧カツトアウトヒユーズにおける
消弧チユーブの製造方法に関し、より詳しくは、
硼酸、水酸化アルミニウム等の内張り消弧剤を有
する消弧チユーブ製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an arc-extinguishing tube in a high-pressure cut-out fuse, and more specifically,
The present invention relates to a method for manufacturing an arc-extinguishing tube having a lining arc-extinguishing agent such as boric acid or aluminum hydroxide.
従来、可溶体を頭部端子と下部リード線間に張
設し、全体を消弧チユーブで被覆してなる高圧カ
ツトアウトヒユーズの消弧チユーブは、クラフト
紙や軟質塩化ビニル、あるいはポリカーボネイト
等で形成されたものが一般的であるが、ヒユーズ
の小電流動作時において、アークに長時間さらさ
れた場合、内部圧力の上昇すなわちアーク抵抗の
上昇が不十分なため焼損を生じ、場合によつては
ヒユーズ筒にも損傷を及ぼし、さらには遮断不能
をも生起することがあつた。また大電流動作時に
おいては、急激な内部圧力の上昇により消弧チユ
ーブが破壊されて飛散したり、また瞬時にして焼
損するための動作途中において消弧能力が消失し
遮断不能に至る等の種々問題点があつた。これら
の問題点を解消するものとして、硼酸チユーブの
ごとく、内張り消弧剤を有する消弧チユーブがあ
る。これは、アスベスト筒に硼酸層を内張りし、
あるいはさらに外側をクラフト紙、塩化ビニル、
ポリカーボネイト等で被覆したものであり、既に
公知の技術である。この内張り消弧剤を有する消
弧チユーブの消弧能力について付言すると、ま
ず、ヒユーズの小電流動作時においては、アーク
により消弧剤が容易に熱分解し、大量の消弧性ガ
スや水蒸気ガスを放出するため、内部圧力が極め
て容易に上昇し、遮断能力が飛躍的に向上するも
のであり、また大電流動作時においては、熱分解
ガス効果により外側チユーブの瞬時的焼損を極力
回避でき、急激な圧力変化に対しては、消弧剤が
容易に破壊するので外側チユーブに対して緩衝剤
となり得、消弧チユーブ全体の破壊飛散を回避で
きるものである。上述のごとく、内張り消弧剤を
有する消弧チユーブはすぐれた消弧能力を有する
のであるが、従来の製造法においては、アスベス
ト紙に硼酸を内張りしてチユーブ状に巻きつけた
り、あるいは、アスベスト筒に硼酸の水溶液を充
填して乾燥させた後、別工程において穴開け加工
を施す方法を採つていた。一般に高圧カツトアウ
トヒユーズの消弧チユーブの外径は小さいので消
弧剤の肉厚も必然的に薄肉となるが、従来の製造
法では、このような薄肉の内張り層を一体的に形
成する方法としては不適当であり、寸法的に安定
し、筒体との一体性も良好な良品を量産すること
が困難で、偏肉を生じたり、また消弧剤の壁面強
度の平均化が困難なため振動により消弧剤壁面の
部分崩落を生じたりして、可溶体の特性を損ねた
り場合によつてはヒユーズにおける遮断不能も来
たす危険性があつた。 Conventionally, the arc-extinguishing tube of a high-voltage cut-out fuse is made of kraft paper, soft vinyl chloride, polycarbonate, etc., in which a fusible material is stretched between the head terminal and the lower lead wire, and the entire body is covered with an arc-extinguishing tube. However, if the fuse is exposed to an arc for a long time when operating at a low current, the internal pressure increases, that is, the arc resistance increases insufficiently, resulting in burnout and, in some cases, This also caused damage to the fuse cylinder, and even caused the failure to shut off. In addition, during high current operation, the arc extinguishing tube may be destroyed and scattered due to a sudden increase in internal pressure, or it may burn out instantly, causing the arc extinguishing ability to be lost during operation, resulting in failure to shut off. There was a problem. As a solution to these problems, arc-extinguishing tubes having an arc-extinguishing agent lined therein, such as boric acid tubes, are available. This is an asbestos tube lined with a boric acid layer,
Or use kraft paper, vinyl chloride, or
This is a well-known technique that is coated with polycarbonate or the like. Regarding the arc-extinguishing ability of the arc-extinguishing tube that has this lining arc-extinguishing agent, first of all, when the fuse is operated at a small current, the arc-extinguishing agent is easily thermally decomposed by the arc, and a large amount of arc-extinguishing gas and steam gas are generated. , the internal pressure rises extremely easily and the breaking ability is dramatically improved.Also, during high current operation, instantaneous burnout of the outer tube can be avoided as much as possible due to the pyrolysis gas effect. In response to sudden pressure changes, the arc-extinguishing agent easily breaks down, so it can act as a buffer for the outer tube, thereby avoiding the destruction and scattering of the entire arc-extinguishing tube. As mentioned above, arc-extinguishing tubes with an arc-extinguishing agent lining have excellent arc-extinguishing ability, but in conventional manufacturing methods, asbestos paper is lined with boric acid and wrapped into a tube shape, or asbestos tubes are lined with boric acid and wrapped in a tube shape. The method used was to fill the container with an aqueous solution of boric acid, dry it, and then drill holes in a separate process. Generally, the outside diameter of the arc-extinguishing tube of a high-pressure cut-out fuse is small, so the wall thickness of the arc-extinguishing agent is inevitably thin.However, in conventional manufacturing methods, such a thin lining layer is integrally formed. It is difficult to mass-produce good products that are dimensionally stable and have good integrity with the cylindrical body, resulting in uneven thickness, and it is difficult to equalize the wall strength of the arc quenching agent. Therefore, there was a risk that the vibrations could cause a partial collapse of the wall of the arc quencher, impairing the properties of the fusible material, and possibly making it impossible to shut off the fuse.
そこで、この発明の目的とするところは、寸法
的にも強度的にも安定し、筒体との一体性も良好
で、量産性にもすぐれた新規な製造法を提供する
ところにある。 Therefore, an object of the present invention is to provide a novel manufacturing method that is stable in terms of dimensions and strength, has good integration with the cylinder, and is excellent in mass production.
この発明は上記目的を達成すべく、密閉金型内
において、内張り消弧剤を加圧下に一体成型する
ようにしたもので、これによつて消弧剤層の肉厚
及び強度の均一化ならびに筒体との良好な一体化
を図つたものである。すなわち、硼酸、水酸化ア
ルミニウム等の紛末消弧剤を用いて内張り層を形
成するに際し、この紛末消弧剤を粘結剤溶液、た
とえばメチルセルロース水溶液、ポリ塩化ビニル
溶液等に混入し、紛末消弧剤混入溶液を調整して
おく。一方、アスベスト紙、クラフト紙等の消弧
チユーブ用筒体を密閉金型内に設置して、上記紛
末消弧剤混入溶液を加圧充填後、筒体の中心軸を
通る圧入ピンを筒体の一方端から他方端を通つて
圧入貫通させ、金型開放部から圧入ピンの略分量
に相当する充填材料を押し出し、圧入ピンを戻し
た後金型から筒体を外して乾燥固化させることを
特徴とするものである。 In order to achieve the above-mentioned object, this invention integrally molds the lining arc-extinguishing agent under pressure in a closed mold, thereby making the thickness and strength of the arc-extinguishing agent layer uniform, and This is intended for good integration with the cylindrical body. That is, when forming a lining layer using a powdered arc-quenching agent such as boric acid or aluminum hydroxide, this powdered arc-quenching agent is mixed into a binder solution, such as an aqueous methyl cellulose solution or a polyvinyl chloride solution. Prepare a solution containing arc quenching agent. On the other hand, a cylindrical body for an arc extinguishing tube made of asbestos paper, kraft paper, etc. is placed in a closed mold, and after filling the solution containing powdered arc quenching agent under pressure, a press-fitting pin passing through the central axis of the cylindrical body is inserted into the tube. Press-fitting the cylinder through the body from one end to the other, extruding a filler material approximately equivalent to the amount of the press-fit pin from the open part of the mold, and after returning the press-fit pin, removing the cylinder from the mold and drying and solidifying it. It is characterized by:
すなわち、この発明に係る消弧チユーブの製造
法は、メチルセルロース水溶液、ポリ塩化ビニル
溶液等の粘結剤溶液中に硼酸、水酸化アルミニウ
ム等の紛末消弧剤を混入して調整した紛末消弧剤
混入溶液をアスベスト紙、クラフト紙等の消弧チ
ユーブ用筒体内に密閉金型内において加圧充填す
る工程、この筒体の中心軸を通る圧入ピンを筒体
の一方端から他方端を通つて圧入貫通させ、金型
開口部から略ピンの圧入量に相当する量の充填材
料を押し出す工程、並びにピンの抜き取りおよび
離型後乾燥固化する工程からなつている。 That is, the method for producing an arc extinguishing tube according to the present invention is a powder extinguishing tube prepared by mixing a powder arc extinguishing agent such as boric acid or aluminum hydroxide into a binder solution such as a methylcellulose aqueous solution or a polyvinyl chloride solution. The process of pressurizing and filling an arc agent-containing solution into a cylinder for arc extinguishing tubes made of asbestos paper, kraft paper, etc. in a closed mold, and inserting a press-fit pin through the central axis of the cylinder from one end of the cylinder to the other. The process consists of a step of press-fitting the pin through the mold opening and extruding an amount of filling material approximately equivalent to the amount of the pin press-fitted from the mold opening, and a step of removing the pin and drying and solidifying it after releasing the mold.
以下この発明に係る、内張り消弧剤を有する消
弧チユーブの製造法について図面に従つて詳細に
説明する。 Hereinafter, a method for manufacturing an arc-extinguishing tube having an arc-extinguishing agent lining according to the present invention will be described in detail with reference to the drawings.
まずこの発明において使用する密閉金型の一例
について第１図において説明すると、図示のごと
く、３部構成となつている。すなわち、１ａは図
面上左右に開く可動型で、内部にセツトされる消
弧チユーブ用筒体２の直径方向を区画しており、
上下方向は上面より圧入される可動型１ｂと底面
側を区画する固定型１ｃとによつて区画される。
可動型１ｂは独立して上下動する圧入ピン３を有
しており、また、固定型１ｃは圧入ピン３と時間
的ズレをもつて連動するか、あるいは格別に上下
動する閉塞子４を有している。 First, an example of the closed mold used in the present invention will be explained with reference to FIG. 1. As shown in the figure, it has a three-part structure. That is, 1a is a movable type that opens left and right in the drawing, and divides the diametrical direction of the arc-extinguishing tube cylinder 2 that is set inside.
The vertical direction is defined by a movable mold 1b that is press-fitted from the top surface and a fixed mold 1c that partitions the bottom surface side.
The movable mold 1b has a press-fitting pin 3 that moves up and down independently, and the fixed mold 1c has an obturator 4 that interlocks with the press-fitting pin 3 with a time lag or moves up and down in an exceptional manner. are doing.
第１図の状態は、上記のような密閉金型内にア
スベスト製の消弧チユーブ用筒体２をセツトし、
かつ、メチルセルロース水溶液に硼酸紛末を混入
した溶液５を注入し、可動型１ｂによつて加圧充
填を開始した状態を示している。この場合同時に
アスベストへの含浸も行なわれる。加圧充填後、
第２図のごとく、筒体２の中心軸を通つて移動す
る圧入ピン３を筒体の一方端から圧入する。この
場合、固定型１ｃの開口部６を閉塞している閉塞
子４が圧入ピン３の圧入に従い、有効な押し出し
圧力を保持しながら移動し、第３図に示すごと
く、筒体２の他方端を通つて貫通する位置まで圧
入した際、略圧入ピン３の分量に相当する充填材
料が開口部６から押し出される。第４図は、圧入
ピンを抜き取り、離型後、乾燥固化させて成型し
た消弧チユーブを示しており、内張り消弧剤７が
一体的に形成されている。なおこの例の場合、粘
結剤にメチルセルロース、紛末消弧剤に硼酸を使
用したがこの他に粘結剤として塩化ビニル、紛末
消弧剤として水酸化アルミニウム等が利用可能
で、特定物質に限定されるものではない。また粘
結剤溶液の濃度はメチルセルロース水溶液で１〜
３％、粘結剤溶液と紛末消弧剤の重量比は１：１
程度、加圧荷重は３〜4ton程度であるがこれに限
定されるものではない。 In the state shown in Fig. 1, an asbestos arc-extinguishing tube cylindrical body 2 is set in the sealed mold as described above.
It also shows a state in which a solution 5 in which boric acid powder is mixed into an aqueous methyl cellulose solution is injected and pressure filling is started by the movable mold 1b. In this case, the asbestos is also impregnated at the same time. After pressure filling,
As shown in FIG. 2, a press-fitting pin 3 moving through the central axis of the cylinder 2 is press-fitted from one end of the cylinder. In this case, the obturator 4 that closes the opening 6 of the fixed mold 1c moves according to the press-fitting of the press-fitting pin 3 while maintaining effective extrusion pressure, and as shown in FIG. When the filling material is press-fitted to the position where it penetrates through the hole, a filling material approximately equivalent to the amount of the press-fit pin 3 is pushed out from the opening 6. FIG. 4 shows an arc-extinguishing tube formed by removing the press-fit pins, releasing the mold, and drying and solidifying the tube, in which the lining arc-extinguishing agent 7 is integrally formed. In this example, methylcellulose was used as the binder and boric acid was used as the powder arc extinguisher, but other materials such as vinyl chloride as the binder and aluminum hydroxide as the powder arc extinguisher can also be used. It is not limited to. In addition, the concentration of the binder solution is 1 to 1 in methylcellulose aqueous solution.
3%, weight ratio of binder solution and powdered arc quenching agent is 1:1
The pressure load is approximately 3 to 4 tons, but is not limited to this.
上述の通り、紛末消弧剤混入溶液は密閉金型内
に加圧充填するので、充填物の密度が高く、乾燥
後の壁面強度も平均化し、筒体との一体性もきわ
めて強固であり、寸法的にも安定する。また充填
後の流動性を保有した段階において、所定寸法の
圧入ピンを圧入して所望肉厚の内張り消弧剤を形
成する方法であるから偏肉等も回避でき、良品を
簡単に量産し得るものである。なおかくして得ら
れた消弧チユーブは、単体で使用し得るほか、さ
らに外側にクラフト紙、塩化ビニル、ポリカーボ
ネイト筒等を被覆して使用する。クラフト紙の筒
体に対し内張り消弧剤を直接形成することも可能
であるが、両者間の膨潤度の差異を考慮すれば、
上記２重筒使用が好ましい。なおまた、内張り消
弧剤が風雨や、リード線を介して侵入した雨水等
に接触した場合、消弧剤が溶け出し、その役目を
果さなくなるばかりか、可溶体に付着してヒユー
ズの溶断特性に悪影響を及ぼす危惧がもたれる
が、上記のごとくにして得られた消弧チユーブを
シリコン油やワニスの溶液に一定時間浸漬して乾
燥させ、内張り消弧剤の壁面に薄膜コーテイング
を施して発水処理すればさらに好ましい消弧チユ
ーブを得ることができる。 As mentioned above, the powdered arc-quenching agent-containing solution is pressurized and filled into a closed mold, so the density of the filling is high, the wall strength after drying is even, and the integrity with the cylinder is extremely strong. , and dimensionally stable. In addition, since the method press-fits a press-fit pin of a predetermined size to form the lining arc-extinguishing agent with the desired wall thickness at the stage where it maintains fluidity after filling, it is possible to avoid uneven thickness, etc., and it is possible to easily mass-produce good products. It is something. The arc-extinguishing tube thus obtained can be used alone or by covering the outside with kraft paper, vinyl chloride, polycarbonate tube, etc. It is also possible to form the lining arc extinguisher directly on the kraft paper cylinder, but considering the difference in swelling degree between the two,
It is preferable to use the above-mentioned double tube. Furthermore, if the lining arc-extinguishing agent comes into contact with wind and rain or rainwater that has entered through the lead wire, the arc-extinguishing agent will not only melt and no longer fulfill its role, but also adhere to the fusible material and cause the fuse to blow. Although there is a risk of adversely affecting the characteristics, the arc-extinguishing tube obtained as described above is immersed in a solution of silicone oil or varnish for a certain period of time, dried, and a thin film coating is applied to the wall of the arc-extinguishing agent lining. A more preferable arc-extinguishing tube can be obtained by water treatment.
以上この発明は構造上好ましいにも拘わらず、
製造上において難点のあつた内張り消弧剤を有す
る消弧チユーブの改良された製造法を提供し得た
のであり、当該分野に資するところ大である。 Although this invention is structurally preferable,
It has been possible to provide an improved manufacturing method for arc-extinguishing tubes having an arc-extinguishing agent lining, which has been difficult to manufacture, and will greatly contribute to this field.
第１図ないし第３図は、この発明に係る製造法
の一実施例を示す縦断面図、第４図は、同例にお
いて製造された完成品の縦断面図である。
１ａ，１ｂ，１ｃ……密閉金型、２……消弧チ
ユーブ用筒体、３，９……圧入ピン、５……溶
液、６……開口部。
1 to 3 are longitudinal sectional views showing one embodiment of the manufacturing method according to the present invention, and FIG. 4 is a longitudinal sectional view of a finished product manufactured in the same example. 1a, 1b, 1c... closed mold, 2... cylindrical body for arc-extinguishing tube, 3, 9... press-fit pin, 5... solution, 6... opening.
Claims (1)
液等の粘結剤溶液中に硼酸、水酸化アルミニウム
等の紛末消弧剤を混入して調整した紛末消弧剤混
入溶液をアスベスト紙、クラフト紙等の消弧チユ
ーブ用筒体内に密閉金型内において加圧充填する
工程、この筒体の中心軸を通る圧入ピンを筒体の
一方端から他方端を通つて圧入貫通させ、金型開
口部から略ピンの圧入量に相当する量の充填材料
を押し出す工程、並びにピンの抜き取りおよび離
型後乾燥固化する工程からなる内張り消弧剤を有
する消弧チユーブの製造法。1. A powdered arc-extinguishing agent solution prepared by mixing a powdered arc-extinguishing agent such as boric acid or aluminum hydroxide into a binder solution such as an aqueous methylcellulose solution or a polyvinyl chloride solution is used to extinguish asbestos paper, kraft paper, etc. The process of pressurizing and filling the cylinder for an arch tube in a closed mold, by press-fitting a press-fit pin passing through the center axis of the cylinder from one end of the cylinder through the other end, and inserting a pin from the opening of the mold. A method for manufacturing an arc-extinguishing tube having an arc-extinguishing agent lined therein, which comprises a step of extruding a filler material in an amount corresponding to the amount of press-in, and a step of removing the pin and drying and solidifying after releasing the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6376984A JPH0227769B2 (en) | 1984-03-31 | 1984-03-31 | SHOKOCHUUBUNOSEIZOHO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6376984A JPH0227769B2 (en) | 1984-03-31 | 1984-03-31 | SHOKOCHUUBUNOSEIZOHO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60208021A JPS60208021A (en) | 1985-10-19 |
| JPH0227769B2 true JPH0227769B2 (en) | 1990-06-19 |
Family
ID=13238905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6376984A Expired - Lifetime JPH0227769B2 (en) | 1984-03-31 | 1984-03-31 | SHOKOCHUUBUNOSEIZOHO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0227769B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0525158Y2 (en) * | 1988-10-21 | 1993-06-25 | ||
| JPH0443954Y2 (en) * | 1988-10-21 | 1992-10-16 |
-
1984
- 1984-03-31 JP JP6376984A patent/JPH0227769B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60208021A (en) | 1985-10-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |