DE102013103118A1 - Multistrand steel wire rope with a multi-core fiber core - Google Patents

Abstract

A multi-strand steel wire rope (1) with a multi-strand fiber insert (3) is characterized in that at least one electrically conductive sensor thread (7) is arranged in the region of the fiber insert (3).

Description

The invention relates to a multi-strand steel wire rope with a mehrschäftigen fiber core.

The wear-related Ablegereifeerkennung on steel wire ropes is possible by externally visible wire breaks. Especially with current steel wire ropes, this inspection is tedious and time consuming. There is thus the desire for a permanent rope monitoring, especially when the rope is running.

The EP 2 434 050 A1 describes textile ropes, tapes, cords, cords, in particular of chemical or natural fibers or wire strands or a combination thereof. The known cable contains a sensor module which contains at least one electrically conductive sensor element for detecting strain or disruption loads. The sensor module can be arranged centrally in the core of the rope as a standing thread extending along a longitudinal axis of the rope.

The sensor element may comprise a braiding or wrapping of a non-conductive yarn material. The sensor module is provided at least at one of its ends with an externally accessible contact element in order to connect the sensor module to a measuring electronics, which can be interrogated from the outside electrically contacting or non-contact.

The invention has for its object to provide measures in a Mehrlitzigen steel wire rope with a mehrschäftigen fiber insert to allow in particular on current steel wire ropes permanent rope monitoring in terms of defects, especially wire breaks.

For this purpose, the multi-strand steel wire rope according to the invention is characterized in that at least one electrically conductive sensor thread is arranged in the region of the multi-core fiber core.

According to a preferred embodiment, the sensor thread for forming a sensor element is associated with a support thread of natural fiber and / or plastic fibers. The sensor thread or the sensor element is preferably introduced as a core thread on a stranding machine, in particular textile stranding machine in the mehrschäftige fiber core.

Preferred embodiments of the invention are dealt with in subclaims.

The invention will be described in more detail below with reference to the drawing:

1 shows a schematic representation of a cross section of the multi-stranded steel wire rope according to the invention;

2 shows a schematic representation of the integration of a sensor thread or sensor element as a core thread a vierschäftige fiber insert by stranding by means of a (not shown) stranding machine;

3 shows a schematic representation of a sensor element consisting of a wound by a sensor thread support thread;

4 shows a schematic representation of a sensor element consisting of a support thread and at least one substantially parallel to the support thread on the support thread outside extending sensor thread.

• – acht Stahldrahtlitzen 2 in 19-drähtiger zum Beispiel Seale-Ausführung (1-9-9),
• – einer vierschäftigen Fasereinlage 3 aus vier Schenkeln bzw. Schäften 4 aus Naturfaser- und/oder Kunststofffaserlitzen 4 sowie
• – einem Sensorelement 5, bestehend aus einem Stützfaden 6 und mindestens einem Sensorfaden 7.

1 shows a schematic representation of a steel wire rope 1 , consisting of

• - eight steel wire strands 2 in 19-wire, for example Seale version (1-9-9),
• - a four-core fiber insert 3 from four legs or shanks 4 made of natural fiber and / or plastic fiber strands 4 such as
• A sensor element 5 consisting of a supporting thread 6 and at least one sensor store 7 ,

According to 2 is that in 3 illustrated sensor element 5 that consists of at least one around a support thread 6 wound or tortuous sensor thread 7 exists as a core thread on a stranding machine, in particular textile stranding machine, in the mehrschäftige fiber core 3 brought in. This can be the sensor thread 7 or the sensor element 5 under bias and / or pre-rotation in the fiber core 3 be introduced.

Each sensor thread consists either of metal wire or of a thread made of an electrically conductive material, preferably silver, of natural fibers or synthetic fibers, preferably polyamide filament, or of a braid containing sensor threads and other threads and / or yarns.

At the in 4 illustrated sensor element 5 runs at least one sensor thread 7 essentially parallel to the support thread 6 at the support thread outside. According to a preferred embodiment of the invention extends at least one sensor thread 7 each in the braiding and in the soul of the support thread 6 ,

Each sensor thread is preferably in a braided polyester filament / filament sheath integrated and / or part of the braided jacket.

The fiber insert 3 may consist of staple fibers or monofilaments.

The fiber insert 3 preferably consists of natural fibers, preferably sisal yarns, and / or plastic fibers.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2434050 A1 [0003]

Claims (18)

Multi-strand steel wire rope ( 1 ) with a multi-core fiber insert ( 3 ), characterized in that in the region of the fiber insert ( 3 ) at least one electrically conductive sensor thread ( 7 ) is arranged. Steel wire rope according to claim 1, characterized in that the sensor thread ( 7 ) for forming a sensor element ( 5 ) a support thread ( 6 ) is assigned from natural fibers and / or plastic fibers. Steel wire rope according to claim 1 or 2, characterized in that the sensor thread ( 7 ) or the sensor element ( 5 ) as core thread on a stranding machine in the mehrschäftige fiber core ( 3 ) is introduced. Steel wire rope according to claim 3, characterized in that the sensor thread ( 7 ) or the sensor element ( 5 ) under bias in the fiber core ( 3 ) is introduced. Steel wire rope according to claim 3, characterized in that the sensor thread ( 7 ) or the sensor element ( 5 ) with a pre-rotation in the fiber insert ( 3 ) is introduced. Steel wire rope according to claim 3, characterized in that the sensor thread ( 7 ) or the sensor element ( 5 ) under pretension and with pre-rotation into the fiber core ( 3 ) is introduced. Steel wire rope according to one of claims 1 to 6, characterized by an at least three-strong, preferably four-stranded fiber core ( 3 ). Steel wire rope according to one of claims 1 to 7, characterized in that each electrically conductive sensor thread ( 7 ) consists of metal wire. Steel wire rope according to one of claims 1 to 7, characterized in that each sensor thread ( 7 ) consists of a steamed with an electrically conductive material thread of natural fibers. Steel wire rope according to one of claims 1 to 7, characterized in that each sensor thread ( 7 ) consists of a vapor-deposited with an electrically conductive material thread of plastic fibers. Steel wire rope according to one of claims 2 to 10, characterized in that at least one sensor thread ( 7 ) running substantially parallel with the support thread ( 6 ) is arranged on the support thread outer sides. Steel wire rope according to one of claims 2 to 10, characterized in that the support thread ( 6 ) of at least one sensor thread ( 7 ) is wrapped. Steel wire rope according to one of claims 2 to 10, characterized in that at least one sensor thread ( 7 ) in each case in the braiding and in the soul of the support thread ( 6 ) runs. Steel wire rope according to one of claims 1 to 13, characterized in that each sensor thread ( 7 ) consists of polyamide filament or polyamide tapes coated with metal, preferably silver. Steel wire rope according to one of claims 1 to 10, characterized in that each sensor thread ( 7 ) is incorporated into a braided polyester thread / filament sheath. Steel wire rope according to one of claims 1 to 15, characterized in that the fiber core ( 3 ) consists of natural and / or plastic fibers. Steel wire rope according to claim 16, characterized in that the fiber core ( 3 ) consists of sisal yarns. Steel wire rope according to claim 16, characterized in that the fiber core ( 3 ) consists of staple fibers or monofilaments.

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