DE749403C - Explosion-proof encapsulation for electrical equipment, especially for mining - Google Patents

Explosion-proof encapsulation for electrical equipment, especially for mining

Info

Publication number
DE749403C
DE749403C DEH166453D DEH0166453D DE749403C DE 749403 C DE749403 C DE 749403C DE H166453 D DEH166453 D DE H166453D DE H0166453 D DEH0166453 D DE H0166453D DE 749403 C DE749403 C DE 749403C
Authority
DE
Germany
Prior art keywords
mining
explosion
electrical equipment
encapsulation
proof encapsulation
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
Application number
DEH166453D
Other languages
German (de)
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 filed Critical
Priority to DEH166453D priority Critical patent/DE749403C/en
Application granted granted Critical
Publication of DE749403C publication Critical patent/DE749403C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02Bases, casings, or covers
    • H01H9/04Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
    • H01H9/042Explosion-proof cases
    • H01H9/046Explosion-proof cases with internal explosion inhibiting means

Landscapes

  • Insulated Conductors (AREA)

Description

Explosionssichere Kapselung für elektrische Geräte, insbesondere für den Bergbau Die Erfindung betrifft eine explosionssichere Kapselung für . elektrische Geräte, insbesondere für den Bergbau. Ura z. D. in schlagwettergefährdeten Grubenbetrieben elektrische Geräte verwenden zu können, müssen diese mit besonderen Sicherheitsvorrichtungen versehen sein, um zu verhindern, daß durch Funkenbildung, z. B. beim Schalten, Schlagwettergemische gezündet werden. Die bisher getroffenen Schutzmaßnahmen haben entweder die Aufgabe, Zündungen unmöglich zu machen (ölkapselung, Fremd-belüftung) oder eine Zündung im Gehäuse des elektrischen Betriebsmittels zwar zuzulassen, den Explosionsvorgang aber mit Sicherheit nur auf das Gehäuse zu beschränken. Im Bergbau werden vorwiegend für diesen Zweck elektrische Geräte mit druckfester Kapselung verwendet. Durch diese Kapselung, die einen Innendruck von 8 at aushalten soll ' wird der Bau der elektrischen Geräte sehr erschwert, außerdem das Gewicht in unerwünschter Weise beträchtlich erhöht.Explosion-proof encapsulation for electrical devices, in particular for mining. The invention relates to an explosion-proof encapsulation for . electrical equipment, in particular for mining. Ura z. D. to be able to use electrical equipment in mines at risk of firedamp, they must be provided with special safety devices to prevent sparks, e.g. B. when switching, firedamp mixtures are ignited. The protective measures taken up to now either have the task of making ignitions impossible (oil encapsulation, external ventilation) or of allowing ignition in the housing of the electrical equipment, but with certainty of restricting the explosion process only to the housing. In mining, electrical devices with flameproof enclosures are mainly used for this purpose. This encapsulation, which is supposed to withstand an internal pressure of 8 at ' , makes the construction of the electrical devices very difficult and also increases the weight considerably in an undesirable manner.

Gemäß der Erfindung besteht die Kapselung des Gerätes aus Silicatfasern, z. B. Glaswolle. Durch die völlige Einhüllung in SilicatfaseM bzw. durch ein Ausstopfen aller freien Räume mit diesem Material wird die Einwirkung einer Zündquelle auf Schlagwettergemische besonders wirksam verhindert. Die starke Wärmedämmu#ng der Silicatfasern verhindert einen zur Ent ' zündung von Schlagwettergemischen ausreichenden Wärmeübertritt; die gegebenenfalls in die Silicatfasern eindringenden zündbaren Gase werden durch die riesige Anzahl der Silicatfasern in so kleine Mengen aufgeteilt, daß eine Entzündung nicht mehr möglich ist.According to the invention, the encapsulation of the device consists of silicate fibers, e.g. B. Glass wool. By completely encasing them in silicate fiber or by stuffing all free spaces with this material, the effect of an ignition source on firedamp mixtures is particularly effectively prevented. The strong Wärmedämmu # ng prevents the silicate fibers to a Ent 'ignition of firedamp mixtures sufficient heat conversion; any ignitable gases which penetrate into the silicate fibers are divided into such small quantities by the huge number of silicate fibers that ignition is no longer possible.

Da die Silicatfasern sehr leicht sind, kommt die hohe Gewichtzu-nahme, die bei der druckfesten Kapselung entsteht, in Fortfall. Die Anbringung des Schutzes ist einfach. Das Material ist billig. Das Arbeiten der neuen Sicherheitseinrichtung kann leicht überwacht werden. Infolge der hohen Beständigkeit und der großen Widerstandsfähigkeit des Materials gegen chemische Einflüsse bleibt die Schutzvorrichtung, z. B. auch bei feuchten Grubenwettern, auch nach langer Anwendungsdauer voll wirksam.Since the silicate fibers are very light, there is a high increase in weight, resulting from the flameproof enclosure, no longer applicable. The attachment of the protection is simple. The material is cheap. The work of the new safety device can be easily monitored. As a result of the high durability and great resistance of the material against chemical influences remains the protective device, z. Belly in damp pit weather, fully effective even after a long period of use.

Es ist bereits bekannt, Glaswolle in gesponnener Form zur Isolierung von elektrisehen Leitern zu verwenden. Die Glaswolle erfüllt-hierbei jedoch nur den gleichen Zweck wie die üblichen Isolierstoffe, wie Gunimi, jute- ifs#v., die für- den vorliegenden Zweck völlig unbrauchbar sind.It is already known to use spun glass wool for insulation of electric view Use ladders. The glass wool fulfills-here but only the same purpose as the usual insulating materials, such as gunimi, jute- ifs # v., which are completely useless for the present purpose.

Claims (1)

PATENTANSPRUCH: Explosionssichere Kapselung für elektrische Geräte, insbesondere für den Bergbau, dadurch gekennzeichnet (laß diese Kapselung aus Silicatfasern. z. B. Glas-I - b wolle, besteht. Zur Abgrenzung des Anmeldiiiigsgcgeii-23 standes vom Stand der Technik ist im Ertullungsverfahren folgende Druckschrift in Betracht gezogen worden: ', deutsche Patentschrift ...... . Ni-. 530 905- PATENT CLAIM: explosion-proof encapsulation of electrical devices, in particular for mining, characterized in that (let this encapsulation of silicate fibers such as glass-I - b wool, exists for the definition of the Anmeldiiiigsgcgeii-23 object of the prior art is in Ertullungsverfahren following... been considered publication. ', German Patent ...... Ni 530 905-.
DEH166453D 1941-10-11 1941-10-11 Explosion-proof encapsulation for electrical equipment, especially for mining Expired DE749403C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH166453D DE749403C (en) 1941-10-11 1941-10-11 Explosion-proof encapsulation for electrical equipment, especially for mining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH166453D DE749403C (en) 1941-10-11 1941-10-11 Explosion-proof encapsulation for electrical equipment, especially for mining

Publications (1)

Publication Number Publication Date
DE749403C true DE749403C (en) 1944-11-22

Family

ID=7184202

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH166453D Expired DE749403C (en) 1941-10-11 1941-10-11 Explosion-proof encapsulation for electrical equipment, especially for mining

Country Status (1)

Country Link
DE (1) DE749403C (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE530905C (en) * 1931-08-01 Siemens Schuckertwerke Akt Ges Firedamp protection on electrical machines and devices where rock dust is used to avoid explosions

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE530905C (en) * 1931-08-01 Siemens Schuckertwerke Akt Ges Firedamp protection on electrical machines and devices where rock dust is used to avoid explosions

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