CS238212B1 - Suspension bridge for cables and pipelines - Google Patents

Description

The invention relates to the construction of cables and ducts of various kinds, in particular for ducts, buildings, cable bridges and steel or reinforced concrete structures. The suspension bridge according to the invention is particularly suitable for laying cables and pipes.

It is known to lay cables on cable trays, especially in installations with a large number of cables. These cable trays are either constructed as a cable grating consisting of their arms connected by transverse stiffeners and resting on beams or webs, or as a structure of tensioned ropes consisting of two tensioned wires without sags connected by transverse stiffeners and extending over the booms. These constructions are equipped with tensioning locks by which the wire tension is set to the required value.

These known solutions have many disadvantages. Cable gratings require large cross-sections of both legs at large boom spacing, which negatively affects the weight of the entire X-structure, thus also increasing the cost of the load-bearing structure. Tensioned rope structures require considerable cable cross-sections due to the weight of the cables and the high tension of the carrying ropes, and the correspondingly dimensioned anchorage for the transmission of the rope tension. In addition, if the rope breaks, the entire cable path between the tensioning points is affected. When replacing the support ropes, it is necessary to shut down all the storage cables by switching off the power, which is very expensive. Also, laying cables on these structures is very complicated and requires auxiliary devices.

These drawbacks are eliminated by the cable and pipe suspension according to the invention, which is essentially based ^on the fact that at least two sags are fastened to adjacent booms or struts.

238 212 ropes on which crossbars are arranged to accommodate cables or pipes such that the ropes are fastened to adjacent booms or uprights. The fastening is achieved in such a way that the prefabricated parts of the gangway are provided with vertical eyelets which are, for example, slid onto the boom profile. Another method of fastening is that the ends of the ropes are provided with horizontal loops as holes drilled in flats that are threaded onto the projections on the boom. Parallel cables are provided with crosspieces which are ^thereto attached detachably ^b u3, wherein the thus prefabricated bridge is dopiyavcHia to site or the crossbars are on the slack rope and mounted detachably fixed.

In the case of crossbars of the same height, the height profile of the laid cables is determined by the permissible sag of the ropes. Crossbars of varying height, arranged symmetrically around the center of the sag of the rope and made, for example, of bent profiles, allow the cable to be laid horizontally.

In the accompanying drawing, several exemplary embodiments of a suspension footbridge according to the invention are shown. FIG. 1 is a plan view of an exemplary embodiment of a section of two cable trays of a cable route. Fig. 2 is a front elevation of a cable tray with equally high crossbars; Fig. 3 is a front elevation of a cable tray with different crossbars; Fig. 4 shows a fastening with fastening lugs in; and Fig. 5 shows a loop fastening.

Between the two brackets 1 are mounted three slack rope 2, or at the ends ^and the fastening ^ò ovacíc ^h ling avoided by ^L o ^of the first n ^{N Iku BC} and IC ^to prov Eeny ^of flax 2 are arranged as high £ crossbeams (Figure 2) or crossbars of different heights 2 (FIG. 3), arranged parallel to each other. On these crosspieces and £ 2 are mounted cables 6. For ladders with equally high crossbeams průvěa £ is the same as the cable slack of the cable 2, at different heights crosspieces 2 ^and a slack rope them aligned and the two cables 6 lies in the plane. The crossbars 6, 2 are attached to the slack ropes 2 releasably, for example by clamps) or non-releasably, for example by welding. In addition to the known attachment of the ends of the slack rope 2, such as crimping or entanglement, horizontal guides have proved to be useful. FIG. 4 shows a web 13 / h and to which a slack rope 2 is detachably connected by means of a pin 10, onto which the eyelet 2 is pushed by its opening 8.

If the slack rope 2 is of solid material, a loop 12 is suitable for attaching the slack rope Q to the web 13. This solution

238 212 is preferred because it can accelerate assembly by forming a loop according to the template.

The suspension footbridge can be used to accommodate cables and pipelines in industrial plants, especially chemical ones, while achieving favorable material savings. The scope of assembly and disassembly on site is small. Thanks to the relatively low tension in the ropes and the ropes fastening in all fields, reliability is guaranteed even when ropes break.

Claims (6)

SUBJECT 238 212 3 $ Y N £ L E Z Uo 1. Suspension bridge for cables and pipelines, characterized in that at least two slack cables (2) are fastened to adjacent booms (1) or webs (13), with crossbars (4) parallel to each other (6) for receiving cables (6). ) · Suspension footbridge according to claim 1, characterized in that the slack ropes (2) have a defined sag of about 2% of the length of the slack rope (2). Suspension platform according to Claims 1 and 2, characterized in that the slack rope (2) is fastened to the boom (1) or the web (13) by means of eyelets (9). Suspension footbridge according to items 1 and 2, characterized in that the slack rope (2) is fastened to the boom (1) or web (13) by means of a loop (12) » Suspension footbridge according to Claims 1 to 4, characterized in that the crossbars (4) have the same height. Suspension footbridge according to one of Claims 1 to 4, characterized in that the cross members (5) have different heights.