Cable trays are divided into trough-type cable trays, tray-type cable trays, stepped cable trays, and grid trays. They are composed of brackets, support arms, and installation accessories. It can be erected independently or laid on various buildings (structures) and pipe racks. It reflects the characteristics of simple structure, beautiful appearance, flexible configuration and convenient maintenance. All parts need to be galvanized and installed in the building If the bridge frame outside the open air is near the seaside or belongs to a corrosive area, the material must have the physical characteristics of corrosion resistance, moisture resistance, good adhesion, and high impact resistance.
The laying of cable trays and troughs should be short and quick, and should be laid along walls, columns or beams as much as possible. The installation must be firm and reliable, horizontal and vertical, no distortion, no burrs on the inner wall of the bridge, and complete accessories.
Main points of construction and installation of cable bridge
1. The laying of cable trays and troughs should be short and quick, and should be laid along walls, columns or beams as much as possible. The installation must be firm and reliable, horizontal and vertical, no distortion, no burrs on the inner wall of the bridge, and complete accessories. The material specifications of the uprights, brackets and support arms are configured strictly according to the design drawings and the specifications of the bridge.
2. The distance between fixed cable tray brackets is generally not more than 1.5m-2.0m. When entering and exiting junction boxes, boxes, cabinets, and turning, brackets should be installed within 500mm.
3. Before installation of the cable tray, it should be coordinated with civil engineering, plumbing, ventilation and air conditioning to determine the crossover problem with ventilation pipes and water pipes. According to the principle of letting electricity and water, the cable bridge is on the top, the water pipe is on the bottom, and the bridge is at a high point, installed above the corrosive liquid pipeline and below the heating pipeline.
4. In view of the common problems of cable bridge construction, fully consider the installation requirements of the whole plant, and the quality technicians timely compiled "Cable Bridge Construction Technology and Control Measures" to eliminate the objective factors affecting the quality of the cable bridge technology in advance.
5. In the area of cable tray design, the drawing design provided by the design institute is relatively simple, and the installation dimensions and materials are not complete. The professional construction office should actively arrange for personnel to review the drawings based on the actual situation on the spot, and make partial changes to the drawings. Optimize the construction plan in two aspects. At the same time, fully consider whether the bridge installation collides with the pipeline installation of the maintenance professional, and whether the construction professional reserves the embedded parts correctly, so as to avoid rework in the later period.
6. Pay attention to the human factor of the improvement of process quality, and specially organize the construction personnel to conduct the preliminary process training to correct the common bad habits of construction and improve the quality awareness.