SK8147Y1 - Composite mesh - Google Patents

Abstract

Composite mesh, specifically, made of basalt and / or glass fibers with openings of varying size, having flexible longitudinal strands (3) made of filaments (3a, 3b) rolled compounds and rigid transverse rods (4) parallel to each other interlaced at predetermined intervals (L) with the longitudinal strands (3), characterized in that the individual flexible longitudinal strands (3) have, in the length (L) of the openings (2) created between two rods (4) adjacent rigid transverse, winding directions of the filaments (3a, 3b) opposite each other, while the individual flexible longitudinal strands (3) preceding the rigid transverse rod (4) and following the rigid transverse rod (4) they have an opposite winding direction of the filaments (3a, 3b).

Description

Technical field

The present technical solution relates to a composite mesh applied, for example, in construction and specialized engineering projects, in particular to cover tunnels in underground mining.

BACKGROUND OF THE INVENTION

PL122744U discloses a secondary flexible mining jacket made of composite materials, in particular a composite composed of basalt. This sheathing can be made as a flexible composite mat and is fixed by means of a special bracket, printed on the outline of the tunnel with stiffening bars, replacing the transverse fibers entwined in the openings of the mesh. In such a case, the composite mesh, which is itself a resilient element, does not transmit transverse loads, and its ability to transmit such loads is due to the characteristics of the reinforcing bars supporting its outer part.

DE 3120661 A1 discloses a fabric with a large mesh size, the warp of which is formed of twisted fibers, to which the transverse elements intersect with the warp fibers and are distributed in the warp at respective relative distances by inserting them into the twisted fibers. Both the warp fibers and the cross fibers may be made of plastic, for example aramid fibers. The transverse fibers may be tubular fibers, which increases their transverse tear strength. A composite mesh of this kind is used in the process of reinforcing concrete elements or for strengthening asphalt bonding layers. The use of a composite mesh of this kind as a self-supporting element can lead to difficulties due to the tendency to entangle loose webs resulting from the forces generated by twisting the warp fibers.

The purpose of this utility model is to provide a composite web made of glass fibers or basalt fiber with openings formed by twisted longitudinal fibers and interwoven cross bars that do not tend to become spontaneously entangled when loosely laid or entangled.

The essence of the technical solution

The essence of the net according to the invention is that the individual elastic longitudinal strands made of twisted fibers in the length of successive mesh openings formed between two adjacent transverse inelastic bars have opposite fiber twisting direction and the fiber twisting direction of the individual longitudinal strands before and after the transverse bar .

The main advantage of the utility mesh composite netting is the self-aligning of the twisting forces causing the flexible elongate elements to twist, both in the longitudinal and transverse structure, so that the web of such netting does not tend to entangle the mesh openings spontaneously. A great advantage of netting when made from a composite that contains basalt or fiberglass is its high mechanical strength and corrosion resistance, making it suitable for applications such as, for example, its use as a mining network. In practical terms, it is important that the size of the apertures can be adjusted depending on the intended use by an uncomplicated change in the number of fibers of the longitudinal strands between the braided cross bars.

BRIEF DESCRIPTION OF THE DRAWINGS

The utility model has been presented in more detail in the embodiment shown in the drawing, wherein FIG. 1 shows a top view of a composite web of basalt fibers or glass fibers.

An exemplary embodiment

The composite web 1 with large openings 2 consists of a flexible longitudinal strand 3 formed of two twisted fibers 3a, 3b and transverse stiff bars 4 intertwined between said fibers 3a, 3b. Both fibers 3a, 3b are made of basalt or glass fibers, synthetic resin impregnated and subsequently thermally cured. Adjacent flexible longitudinal strands 3 (Fig. 1) are formed of fibers 3a. 3b with the opposite direction of twisting and one end of each of the cross bars 4 may have a hook-like bend 5 for attaching adjacent strips of composite netting 1, but said end may be straight if the strips are connected by means of wire connectors (not shown). The composite mesh J is made in such a way that the elastic longitudinal strands 3 in the length L of the adjacent openings, in front of the transverse bar 4 and behind the transverse bar 4, have

With K 8147 Y1, the fibers 3a, 3b are twisted in the opposite direction, the length of each opening of the adjacent elastic longitudinal strands 3 having the opposite direction of twisting of the fibers 3a relative to each other. 3b.

The flexible longitudinal strands 3 may be formed from two, three or other suitable number of fibers.

Claims (1)

PROTECTION REQUIREMENTS Composite netting, in particular made of basalt and / or glass fibers with different aperture sizes, having elastic longitudinal strands (3) made of twisted composite fibers (3a, 3b) 5 and mutually parallel rigid cross bars (4) intertwined at predetermined intervals L by longitudinal fibers (3), characterized in that individual elastic longitudinal strands (3) in the length L of openings (2) formed between two adjacent rigid cross bars (4) ) have opposite directions of twisting of the fibers (3a, 3b), wherein the individual elastic longitudinal strands (3), which are in front of the rigid transverse bar (4) and follow the rigid transverse bar (4), have the opposite twisting direction of the fibers (3a, 3b) ).