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Device for detemining requiring or not to charge synthetic fibre rope

A technology for synthetic fibers and ropes, which is applied in the field of devices for identifying whether to replace synthetic fiber ropes, can solve the problems of not being able to explain the internal state of the ropes, the loss of the ropes, etc.

Inactive Publication Date: 2003-05-14
DE REGT GERMANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the indications obtained by this indirect method rely on experimental values ​​and cannot tell about the precise internal state of the rope
Wear and tear of the rope due to e.g. premature material fatigue, short-term overloading or external influences, not taken into account

Method used

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  • Device for detemining requiring or not to charge synthetic fibre rope
  • Device for detemining requiring or not to charge synthetic fibre rope

Examples

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Embodiment Construction

[0014] Figure 1 shows a sheathed aramid fiber rope 1, which consists of three layers of high tensile strength, load-bearing aramid fiber strands 2, 3, 4, 5 twisted together. Composed of concentric layers, these twisted strands are used, for example, as drive ropes in lifting devices. In fact, the aramid fiber rope 1 is constructed with a parallel twisted rope core 6 around which, according to the invention, a strand (also called outer sheath) is twisted in opposite directions. 7. Between the strand layer 7 and the second strand layer 14 of the adjacent core layer 6 is an intermediate sheath 9, preferably made of polyurethane. The cord sheath 10 is around the outside of the strand layer 7 and is well bonded thereto. Along the longitudinal direction of the entire length of the aramid fiber rope 1, a wear-resistant indicating device (in the present invention, also referred to as colored lines, colored lines or marks) 11 is coated on the rope sheath 10 to indicate the aromatic p...

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Abstract

To identify the need for replacement of stranded synthetic fiber ropes, preferably ropes of aramide fiber, a torsionally neutral rope construction of load-bearing fiber strands is obtained by having at least two layers of strands laid together in opposite directions so that the torsional forces in the layers of strands compensate each other. If the layers of the strands become weakened by unequal amounts due to wear or external influences, when the rope is under load and running operationally it begins to twist about its longitudinal axis. The twisting of the rope can be made visible by a colored mark or strip extending along the length of the rope to indicate twisting of the rope thereby providing visual identification of the need for replacement of the rope.

Description

technical field [0001] The present invention relates to a device for identifying the need to replace synthetic fiber ropes, preferably aramid fiber ropes. Background technique [0002] Such a device is known from EP 0 731 209 A1 for identifying the need to replace the twisted fiber rope. Ply ropes are composed of layers of high tensile strength synthetic fibers twisted together and surrounded by a firmly bonded rope sheath. In order to be able to identify the maximum permissible inner rope wear, the extruded rope sheaths have different colors arranged coaxially. Rope sheaths can indicate wear on the driving or driven rope, which is caused by slippage on the traction sheave due to force differences. By reference to the defined running surface of each rope in the traction sheave, experimental values ​​are used to relate the wear of the sheath to the state of wear inside each rope. Thus, when the underlying color is visible, this indicates that the interior of the rope has w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D07B1/02D06H1/00D07B1/14
CPCD07B2201/1036D07B1/145D07B1/148D07B2401/2015D07B1/025D07B1/14D07B2201/1016D07B2201/108D07B2205/205D07B2201/2074D07B2801/10D07B1/02
Inventor 克劳迪奥·迪安吉利斯
Owner DE REGT GERMANY
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