Flexible Electric Control Cable - Nexans > 공지사항

• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

The central aspect 1 includes a pair of wires 1a, 1b, which is stranded along with two interstitial fillings 1c, 1d. The stranding ingredient formed in this fashion is surrounded by a layer 1e of spunbonded polyethylene-terephthalate fabric. Between the layer 2 and the layer three there's a separating layer 5 of a spunbonded fabric made of polyethylene terephthalate. The spunbonded fabrics serve the aim of creating it possible for the respectively adjoining layers to slide with respect to each other. To resolve the problems described, it is proposed within the case of a drum-windable cable with stranding components stranded in not less than two stranding layers, during which the first stranding layer is arranged round a supporting aspect with a steel cable, that at the least one stranding layer is provided with stranding elements that comprise a braided lead cord, an extruded polyamide- or polyester-primarily based sheathing surrounding the lead cord and aramid-based mostly rovings arranged between the lead cord and the sheathing in such a approach that they run in longitudinally. To enhance the working of the cable below the impact of wind forces, and consequently make it potential for such a cable for use as a spreader cable, the core element formed as a supporting factor contains an assembly of braided lead cords on which a braid of tension-resistant plastic filaments is utilized.

EP 0 178 249 B1 discloses a versatile electric control cable in which numerous bundles of wires are stranded on a core element formed as a supporting factor, wherein each bundle of wires comprises a core ingredient with wires stranded on it and during which the core formed by the supporting element and the wires is surrounded with a braiding and a plastic jacket. The core factor of every bundle of wires comprises a braided lead cord, and braided lead cords are likewise organized within the outer interstices of the core. The braided lead cords bring about an increase within the dead weight with out noticeably increasing its movement resistance in the transverse direction or decreasing its flexibility. As well as, an increase within the service lives of the cable and of the general system can also be achieved. In sturdy winds, this could lead to extreme buckling of the cable, which might hinder the sequence of movements of the cable. DE 33 36 616 discloses a drum-windable management cable, comparable to are used in container loading units. Application areas for such cables are container loading gadgets (spreader cables). When the spreader is moved up and down, the cable is exposed to tensile forces of various magnitudes.

One of many causes of those tensile forces is the useless weight of the cable that's wound up onto and unwound from a drum positioned above the spreader. Arranged over the layer three there is a least one taping 6, likewise product of polyethylene terephthalate. FIG. 2 exhibits a side cut-away view of parts 1a and 1b from FIG. 1, in accordance with one embodiment. The wire 1a or 1b that is represented in FIG. 2 comprises a core 10 product of a tension-resistant plastic. FIG. 1 reveals a drum-windable cable which has a central component 1, around which a primary layer 2 of stranding elements 2a is stranded. In the case of the cable described, the stranding components 2a and 3a serve for controlling the arms of the spreader. The length of lay of the person stranding parts is roughly 8 occasions the stranding diameter. The size of lay of the wires 1a, 1b and of the interstitial fillings 1c, 1d is between 20 and forty D, where D is the surface diameter of the stranding component comprising the wires 1a, 1b and the interstitial fillings 1c, 1d. It is also important that the layer if is compressible.

The continuously changing tensile forces appearing on the cable have the effect of fixing the space between the conductors of the wires 1a and 1b. If current is flowing through the conductors, i.e. they're linked to a voltage source, the capacitance of the pair of wires 1a, 1b also changes. The altering of the capacitance is measured and is used as a managed variable for controlling the winding pace of the winding drum. The present invention relies on the article of providing a cable of the sort talked about at first with which it is feasible to permit an in-situ measurement of the tensile forces acting on the cable and, on the basis of the measured values, management the winding speed with which the cable is wound up onto and unwound from a drum during operation. Apart from the advantages arising directly from the thing, there is also the benefit that increased winding speeds are achieved. Over the layer of wires eleven there's a buffer tube 12, which consists of a compressible, elastically deformable materials.