SU773171A1 - Reinforcement rope - Google Patents

Description

one

The invention relates to the production of ropes used as reinforcement in reinforced concrete structures, in conveyor belts and other rubber products,

In the manufacture of prestressed structures and products, steel wire ropes are widely used as reinforcement, since the latter combine the positive qualities of high-strength wire and hot-rolled rod reinforcement and at the same time lack most of the significant drawbacks of the latter.

A reinforcing rope is known, for which they are twisted from wires already having a wavy shape with a wave step smaller than the step of twisting them. Moreover, they must be twisted so that the convex portions on the same wires are located near the concave portions on the adjacent wires 1.

The disadvantages of the rope are that its manufacturing techniques are complex, and its violation can significantly reduce its anchoring capacity; lay-ups of pre-wavy wires (especially with different wave steps) exclude the possibility of obtaining any uniform tension on them when the rope is loaded, which significantly affects the reduction of its aggregate strength.

A reinforcing rope is known, the core of which is made with a cross-section that varies periodically along its length and, moreover, the rope has a seventh strand, while one of the strands 2 is located parallel to the section with a minimum section of the core.

The disadvantages of the known rope are 10 complicated manufacturing techniques; Twisting the strands around the core with a variable cross-section along the length (especially the core with a variable cross-section in the form of a spiral with a dash) eliminates the possibility of

15 due to the structural integrity of the rope, therefore, the uniform tension of the strands when it is loaded.

The closest to the proposed technical essence and the achieved result is a reinforcing cable containing elements of different diameters wound on the core.

The principle of construction of this reinforcing rope is as follows.

A layer of round wires of different diameters is spliced around the central core (wire or strand) with a circular cross-section, the wires of the largest diameter are equally and symmetrically placed in two opposite sections of the cable section. Between the two groups of wires of the largest diameter, and also around the core, thinner wires are equally and symmetrically (relative to the diameter line). The center of the core and the center of the rope are the same. Applying the principle of group arrangement of wires undoubtedly makes the surface of the rope more prominent with the presence of wider recesses, which expands the possibility of using concrete with a larger filling, virtually eliminates (or makes it very difficult) to ensure the rope with the necessary structural integrity during manufacture as well as at other stages. handling it (winding and winding off the drum for transportation when laying in iron-concrete structures, etc.) 3.

The group principle of positioning the wires around a round core substantially deviates the contour of the cross section of the rope from the round one, turning it into a curve of complex variable curvature. Ropes with such a contour, the passage through the forming clamping dies (in which the compression force must be significant) of the cable car, lose their structural integrity due to the extrusion (displacement) of the protruding wires. Naturally, ropes are made with a non-circular profile (contour) of the section (oval), but then the core is also given a corresponding oval contour.

The purpose of the invention is to increase the anchoring capacity of the reinforcing rope and improve its quality due to ease of manufacture.

The goal is achieved due to the fact that in the reinforcing rope containing core elements of different diameters wound on the core, elements with the largest and smallest diameters are located with diametrically opposite sides of the core, and the remaining elements are located along the ascending from the smallest diameter to the largest, while the center of the core offset from the center of the rope by

C - .n.

2

where DK is the diameter of the rope;

do-core diameter; di is the smallest of the diameters of the elements.

In the proposed reinforcing rope, the recesses between its elements can be filled with a corrosion protective material.

FIG. 1 schematically shows a reinforcing rope twisted of 9 wires, a cross section; in fig. 2 - the same of 9 seven-wire strands (a strand may contain another amount of wires, which is dictated by the diameter of the rope).

A rope contour with a diameter of DK and a contour of a core with a diameter of do are two non-concentric circles, one of which (the core) is inside the other. At a certain amount of displacement C

the centers of these circles are established (by relatively simple calculations) the number and diameter of the wires (wires) that should be placed between these circles, touch them, and also touch each other in sequence. FIG. one

8 such wires are shown (the most optimal number from the point of view of the simplicity of the rope lay technology), and only 6 of them are equal in pairs: dj de, and d d d 6- Shift value of C centers

. the rope and the core must be equal

g.,

but

where is dk. - diameter of the rope, mm;

do - core diameter, mm;

Sdt - wire diameter (dia) of the minimum cross-section, mm. Due to the fact that the centers of the rope and the core are displaced, the rope segment is a spatial body with a configuration in the form of a helical wave, which is practically equivalent to a rope with a variable cross section along its length. Such a rope configuration provides him with a high anchoring capacity, since the wavy massive protrusions of concrete that surround him exclude the possibility of both longitudinal movement and rotation around the core axis (it must be borne in mind that any twisted rope always tends to rotate around the core axis) . Therefore, such a shape does not require the presence of a relief surface on the rope and it can be smooth, which allows gaps (hollows) between the wires (straight) to be filled with coordinating protective materials (appropriate sealants, epoxy resins, etc.).

Thus, since the proposed rope consists only of round wires (of different diameter), it has a circular contour of cross section along the length, in the longitudinal

The direction has the configuration of a helical wave, avoids the use of wires of larger diameters (by replacing the wires with strands) and applies corrosion-protective materials without reducing the anchoring capacity, therefore, it will most fully meet all the basic requirements imposed to reinforcing ropes, i.e. it is simple to make; possesses structural stability and convenience at all stages of handling it (especially ftpH production of reinforced concrete structures); has a high anchoring capacity; possesses high temporal resistance.

Claims (3)

1. A reinforcing rope containing elements of different diameters wound on a core, characterized in that, in order to increase its anchoring capacity and quality, elements with the largest and smallest diameters are located on diametrically opposite sides of the core, and the remaining elements are arranged in increasing order from the smallest diameter to the largest, with the center of the core offset from the center of the rope by G -P - "- 4fi n, c - J, and 1, where DK is the diameter of the rope, 5do is the diameter of the core, d is the smallest of the diameters of the elements Comrade 2. A rope according to claim 1, characterized in that the recesses between its elements are filled with a corrosion-protective material. JO Sources of information taken into account in the examination 1. USSR author's certificate No. 587187, cl. D 07 1/06, 09/06/76. 2. USSR Author's Certificate No. 580263, cl. D07B 1/06, 04/12/76.  3. USSR author's certificate number 410148, cl. D 07 B 1/06, 10.28.70. Fig FIG. 2