DE1718210U - HIGHLY FLEXIBLE STRAND FOR ELECTRICAL CABLES. - Google Patents

Description

Karl-A. brose

Dipl -ing.

Munich - Fu »ach
Vienna · 'St !. 1/2 - »·» ϊϋ.-κ.ηβη 79 3878

/ Ba. iittnchen-Pullach, the 2 ί. OKt. 1955

Dipl.Ing. Robert Höhn, Heus β / Rhein _p Furtherstrasee 159

Highly flexible stranded wire for electrical cables

In the assembly line, laughing at Wandert, machine tools and in similar cases electrical devices (welding, soldering, testing devices, electromagnets) are used, their electrical Supply lines sometimes experience many thousands of bends within one work shift. This unusual stress, such as it rarely occurs in other areas of technology, necessitates one very rapid wear of the cables and therefore a service life of often only a few weeks or months. Investigations have shown that the rapid wear and tear of the lines is essentially due to wire stock in the Zupferlitze. The strands usually consist of concentrically stranded wires or wire groups (partial strands), one occurs at every bend in the cable use slight displacement of the wires or wire groups against each other, the stranding layers constantly drag against each other at the points of friction until there is a complete bruise of wires. But once the Bruoh has a single one Wires started, the line quickly becomes unusable. The wear of the stranded wires is accelerated even more, if additional force field effects also occur in the line, for example spot welding devices are usually used in car body construction used in which in immediate succession a greater number of current surges with thousands of amperes are operating appear massive. The extraordinarily large force field impact effects, which are already visible on the outside of the line, naturally also have an abrupt effect on the wire layers of the Cable strands off.

Based on this knowledge, the innovation assumes

to counteract the wear of the stranded wires by No more metal in the endangered areas can rub on metal, but rather wear-resistant material brings in all intermediate cushions. This upholstery material is allowed not fray and must also be rot-proof and rot-proof because the conductor strands because of the high load currents are often water-cooled

For this purpose, a padding material based on polyamide or Polyurethane or a similar base, or a mixed polymer ζ · Β · Polyvinylidene chloride and vinyl chloride, its high wear and scuff resistance is known as proved particularly beneficial. The material in the form of ribbons or solidly injected monophilic dog threads is e.g. applied as an open helix, but preferably as an open braid or as a sprayed-on film skin over each inner stranding layer; if necessary, however, only a few or all Telllitzen with this polyamide or polyurethane padding provided and then stranded together. In the case of water-cooled lines, the line is within the cooling water hose divided into several stranded sub-conductors, each sub-conductor also receives this cushion in one of the specified Shapes so that the deforming impacts of the field forces cannot have a detrimental effect.

Further advantageous details of the innovation can be seen from the drawing, in which the innovation is based on three exemplary embodiments explains 1st. The exemplary embodiment is based on one strand for electrical lines, which is made up of a core strand 1 and two overlying layers 2 and 3 of partial strands.

In the embodiment according to Figure 1 is for the core strand 1 an open helix 4 and for the inner layer 2 an open ribbon fleece 5 chosen as a cushion.

Figure 2 illustrates an implementation example, in which both the core strand 1 and the inner layer 2 surrounded with a film skin 6 as a cushion 1st.

Figure 3 shows a further modification of the innovation, in which the core strand 1 and every second strand of the outer layer 3 are without padding or intermediate layers, while all of the strands of the inner layer 2 and one around the other strand of the outer layer 3 are surrounded by an open mesh of monophilic, solidly sprayed bundle threads 7, so that despite the only partial use of cushioning material in the partial strands, metal cannot rub on metal at any point.

As already mentioned, materials of polyamide, Polyurethane or a similar basis or based on copolymers are used

Claims (1)

- 4th 3 protection claims 1 · Highly flexible wire for electrical wires, characterized in that the conditional by Beibungs- and / or impact forces mutual wear of the pen within the stranding immediately adjacent strand wires or Drahtgrup- prevented by intermediate layers of a wear-resistant and rot-proof material at the exposed areas within the strand will" 2. Stranded wire according to claim 1 _9, characterized in that intermediate layers made of wear-resistant, rot-proof material are arranged between the individual stranding layers. 3 · strand according to claim 1, characterized in that the intermediate layers alternately on neighboring wire groups aage arrange t slnd 4 · strand according to claims 1 to 3, characterized in that the intermediate layers consist of open braids. 5e strand according to claim 1 to 3, characterized in that the Intermediate layers consist of closed foil layers. 6 · strand according to claims 1 to 5 »characterized in that the intermediate layers consist of a material based on polyamide, polyurethane or similar, namely in the form of spun or plaited ribbons or solidly sprayed threads, or in the form of a sprayed-on closed film skin .