DE7238145U - Multi-core, flexible electrical cable - Google Patents

Description

CABLE WORKS REINSHAQEN QMBH - Wuppertal · Berlin · Neumarkt / Opf. ■ Bochum - postal address: 5eWuppertal-Ronsdorf · DIckestr.

Pat.3t / fe, dun October 16, 19-22 LN H9

Multi-core, flexible electrical cable

The invention relates to a multi-core, flexible electrical line with stranded insulated cores and fillings which are surrounded by an outer sheath braid, e.g. B. a B'ige iron supply line. High demands were placed on this in terms of flexibility, because the line (when ironing) is constantly moved back and forth.
Iron supply lines are usually constructed in such a way that the stranded, rubber insulators
are. To the Leituno

th veins surrounded by a braided outer sheath they will give a more pleasing appearance

Wire filler noct ^ mi;. T mistake (a 'filling Such lines keep the best I ¹ Vlie 30,000 bends out before they become unusable, that lose their electrical safety On average, the number of bends is as low as 24,000, the bending test is.. made on a special device, which has two lobes that are moved back and forth on a common slide while the line is exposed to tensile load that the line becomes unusable.

It is already known for highly flexible insulated electrical lines or cables, especially control lines for elevators, the cores in a dry lubricant, eg. B. to embed talc (iJT-PS 1 1O ^1. 551) · But because the talcum order only loosely adheres to the surface of rubberized veins and is lost again in the course of further processing, you have the talc that covers all the gaps between fills the veins, e.g. B. held in place by rubberized fabric straps. "Float the veins' ^one, so to speak itn talc -. The disadvantage here is the additional Arbeite- and money by using the tether so that this measure z, ii for Büge 1 egg senzul ei obligations, no question addition would... Line too voluminous.

72381 ^ 18.1.73

KABELWERKE REINSHAGEN GMBH-Wuppertal Berlin Neumarkt / Opf. · Bochum postal address: 56Wuppertal-Ronsdorf · DIckestr.

The prior art also includes a highly flexible, insulated electrical Line in which the individual wires or partial strands of the conductor afflicted with a dry and / or fat or ointment-like lubricant or are wetted, the viscosity of which is practically temperature-dependent and does not attack the insulating or sheath material used for the cable (DT-GM 1 765 038). If such veins in which the individual Wires are contaminated with a lubricant when iron leads are used, (- the number of permissible bends slightly - in the section et «·« by 10 .äj - the However, the line is still within the desired standard of 60,000 bends far away.

It is an object of the invention to provide a multi-core, flexible electrical Line, e.g. B. iron supply line, to create that with simple Means can be produced, is not too voluminous and at the same time the desired number of 60,000 bends without damage survives. According to the invention this is achieved in that both the wires of the cores as well as the core insulation with a lubricant coating are stranding.

Mμ π could indeed increase the number of bends in an iron supply line by that the individual wires by individual braiding or wrapping been made tensile, as the DT-OS 2 Ο36 Ο78 teaches. These Although construction is very advanced and has been used in elevator control operations already well proven. Free iron supply lines However, it does not work out that the method is too expensive and also how br »in the previously» rvalin ton Hn I te b.'i nd - 5iu a too voluminous line leads.

Some nufyrund <\> \ v only loson liability from GI ümitte 1, z. B. Talc, η α Γ of the upper Γ1 Hch '· of veins treated with it one has so far from it Ab.4t.1nd' (^ nominal, dio Adorn von Uüy «leiswnzuleitungen more slippery:, 5U m.'icli'Mi. /. Min because κλγ to fear that the open outer jacket (jv.

_- 'I.

KABELWERKE REINSHAGEN GMBH - Wuppertal · Berlin · Neumarkt / Opf. · Bochum - postal address: 56 Wuppertal-Ronsdorf Dickestr.

frequent bending would produce an emery effect, which would rub the lubricant off the insulation. Surprisingly, however, it has been shown that a lubricant can be introduced into the microfine depressions of the core insulation in such a way that it only falls off insignificantly during the subsequent braiding, but at the same time significantly reduces the friction between the cores and the outer sheath braiding. Again, however, it is not enough to just apply a lubricant to the insulation of the cores. The bending test on cables manufactured in this way has shown that the number of bends permitted can be increased by around 25-30% compared to a conventional cable. But the envisaged number of 60,000 bends can only be achieved if both the individual wires of the cores and the core insulation are coated with a lubricant. The two layers of lubricant support each other, so to speak, and bring about the overall success.

Improved adhesion of the lubricant coating to the surface The core insulation can also be achieved by applying the lubricant coating by a subsequent rubbing or spreading process the surface of the core insulation is compressed. At the same time, any excess amounts of lubricant are removed. The outer jacket lecht and the inlays can consist of textile thread and / or plastic in a known manner, wr.hrend for the core insulation in usually rubber or a suitable rubber compound is used.

The results of investigations carried out on various lines which were manufactured partly without lubricant, partly with lubricant, illustrate the advantage of the new design. As a common structure, the lines had three cores, each with 23 tinned copper wires of 0.20 mm diameter, a filling and a polyamide outer sheath braid.

Line 1:

Wires without talc, core insulation without talc.

Result: after 24,000 bends (movements) on the CEE bending machine if individual wires were broken, the insulation was pierced and leaked.

Line 2:

Wires with talc, core insulation without talc, Result: after 26,000 bends result as for line 1.

Line 3 ^:

Wires without talc, core insulation with talc.

Result: after 30,000 bends result as for line 1.

Line 4:

Wires with talc, core insulation with talc.

Result: after 60,000 bends, no damage was found.

An embodiment of the invention is shown in the drawing, which shows a section through an iron supply line. The wires 1 are surrounded by the isolation and Z form together with this, the wires 3 · With 4 is designated the filling and with 5d ^as outer sheath braid. The arrows 6 indicate the lubricant coating. The lubricant can of course also penetrate as far as the internal wires, but this is not shown separately.

Both dry and / or fat-like lubricants can be used as lubricants can be used. Has proven itself z. B. - also for cost reasons - talc. Other possible lubricants are paraffin, stearin, Stearates, graphite and pastes based on silicone oil.

Claims (3)

1. Multi-core, flexible electrical cable with stranded insulated Cores and fillings surrounded by a braided outer jacket are e.g. B. iron supply line, characterized in that both the wires (l) of the cores (3) and the Aderisolierumjen (2) are provided with a lubricant coating (6), preferably talc 2. Line according to claim 1, characterized in that the Gleitmittelüber7ug (6) is compacted by a subsequent rubbing or painting process on the surface of the core insulation (2). 3. Line according to claim 1 or 2, characterized in that the Outer sheath braid (5) and the fillings (4) made of textile and / or plastic.