Cable trays are divided into trough-type cable trays, tray-type cable trays, ladder-type cable trays, grid-type cable trays and other structures. They are composed of brackets, arms and installation accessories. It can be erected independently or laid on various buildings (structures) and pipe gallery supports, which embodies the characteristics of simple structure, beautiful appearance, flexible configuration and convenient maintenance. If the bridge is installed in the open air outside a building, if it is at the seaside or in a corrosive area, the material must have physical properties such as corrosion resistance, moisture resistance, good adhesion, and high impact strength. In order to improve the performance of traditional cable trays, the existing bridges have been optimized to a certain extent and some fireproof and anti-corrosion materials have been added. However, the fireproof and anti-corrosion performance of this kind of cable tray is not ideal in actual use. In the existing technology, many bridges are troublesome to lay cables and have poor cable stability. Therefore, we need composite bridges.

In view of the shortcomings of the existing technology, technicians have provided a composite bridge, which solves the problem of unsatisfactory fire protection and anti-corrosion performance of cable bridges in the existing technology during actual use, as well as the trouble of laying cables on many bridges in the existing technology and poor cable stability. The problem. In order to achieve the above purpose, the composite bridge is realized through the following technical solution: a composite bridge includes a main frame, the top of the main frame is provided with an arc-shaped cover plate, and the inner wall of the arc-shaped cover plate is fixedly connected with a T-shaped block, the arc-shaped cover plate is slidingly connected to the side wall of the main frame through a T-shaped block. The top of the main frame is fixedly connected with a rubber strip. The top of the rubber strip is close to the inner wall of the arc-shaped cover plate. The inner bottom of the main frame is provided with The mounting base has fixed strips fixedly connected to both sides of the mounting base, and the fixing strips are fixedly connected to the inner bottom of the main frame through bolts; the top of the mounting base is fixedly connected to the wiring assembly; the side wall of the main frame is fixedly connected to the main connection assembly; The bottom of the main frame is fixedly connected with auxiliary connection components. The first arc-shaped strip and the second arc-shaped strip of the wiring assembly are rotationally connected through a hinge; the first flame-retardant plate is fixed on the inner wall of the first arc-shaped strip; the first flame-retardant plate is fixed on the inner wall of the first arc-shaped strip; A plurality of first semicircular grooves are provided on the upper surface of the fire plate; a second flame retardant plate is fixed on the inner wall of the second arc-shaped strip; a plurality of first semicircular grooves are provided on the lower surface of the second flame retardant plate corresponding to the first semicircular grooves. The inner walls of the second semicircular groove, the first semicircular groove and the second semicircular groove are provided with rubber pads. The first connecting block is fixedly connected to the side wall of the first arc-shaped bar, and the side wall of the second arc-shaped bar is fixedly connected. There is a second connecting block, and a locking rod is screwed on the surface of the second connecting block. The main connection component includes a main connecting rod fixedly connected to the side wall of the main frame. One end of the main connecting rod away from the main frame is fixedly connected to a main fixing plate. The surface of the main fixing plate is provided with a plurality of mounting holes.

The working principle of the composite bridge: when using it, first fix the main fixing plate at the position to be installed in the main connection component, then fix the auxiliary fixing plate at the corresponding position in the auxiliary connection component, and open the first arc strip and the second arc Arc-shaped bar, lay the cable in the first semi-circular groove on the surface of the first flame-retardant board. After the cable laying is completed, close the second arc-shaped bar so that the second semi-circular groove and the first semi-circular groove wrap the cable. Then use the locking rod to fix the first connecting block and the second connecting block, then use the T-shaped block to slide the arc cover plate to the main frame, and then use bolts to firmly connect the first fixed block and the second fixed block.

The above-mentioned composite bridge has the following beneficial effects: by arranging wiring components in the main frame, the entire bridge has better fire protection performance, waterproof performance, anti-corrosion performance, etc. for the installed cables, greatly reducing the impact of external factors on the interior of the bridge, and greatly reducing the impact of external factors on the interior of the bridge. The safety of the bridge is improved and the service life of the bridge is extended to a certain extent.