The general cable tray can be laid with a fully enclosed cable, which is suitable for laying control cables for computer cables, communication cables and other highly sensitive systems. It has a good effect on the shielding interference of control cables and the protection of cables in heavy corrosion environments. The following small series introduces the cable bridge installation specification and cable tray classification.
Cable tray installation specification
First, construction preparation
1, material preparation
The size and type of the cable tray should meet the requirements of the on-site construction environment. Check the inside and outside of the tray should be intact, seamless burrs, no bending, folding, etc., and the mounting attachments should adopt angle steel columns, brackets, brackets, frames, and fastenings. Bolts, snails, nuts, and other mounting parts should be hot-dip galvanized to enhance life and prevent corrosion.
2, tool preparation
Electric hammers, impact drills, grinders, cutting machines (cutting with a hacksaw, which cannot be cut with electrical welding to prevent damage to the galvanized layer), pencils, measuring tapes, wrenches, or even welding machines for the installation of ladder bridges. Is an essential tool.
Second, install
1. The maximum load and supporting distance of the cable tray should be less than the allowable load and the allowable support spacing. No person can be carried during the installation. If the on-site environment is really necessary, there must be safety protection facilities before the person can be carried, and the unqualified non-professionals must not be allowed. Personnel operation.
2. The surface treated pillars, support arm brackets, etc. shall be fixed to the wall with expansion bolts (according to concrete structures and solid brick walls, and shall not be in hollow brick walls). The anti-corrosion paint is applied on the spot. When the cable tray is laid, the support points at the butt joints between the bridges should be set at about 1/4 of the span.
3. For large-span bridges, it is best to place them on the support brackets. Where bends or tees are used, support points need to be added separately. The vertical support arm is set at a fixed point every 1.5 meters.
4. The cables in the bridge should be fixed with cassettes or metal cable clamps. The horizontally installed cables should be fixed at intervals of 2 meters. The cables for vertical installation should be fixed once every 1-1.5 meters.
5. It is not allowed to seal the bridge and the hole through the wall and floor. If it is through the firewall and fire floor, fire isolation measures should be taken.
6, when the construction environment in the outdoor installation of vertical bridge, to prevent passersby can open the bridge cover more hands, when customizing the bridge to respond with suppliers in time, the bridge reinforcement butterfly buckle.
7. When the power cables and control cables are not many, they can be laid on the same bridge, and separate grades of cables are used to separate the different grades of cables.
8, if the construction site is a high corrosion environment requirements, you can use stainless steel, aluminum alloy bridge.
Third, security attention
1. Wearing a safety helmet during construction is a must.
2. Check if the non-skid rope is stable. When using a high stool or ladder, it is forbidden for two people to operate on it at the same time.
3. If the construction requires fire, prepare fire-fighting equipment, and obtain fire proof on the spot, clean the surrounding flammable materials, send someone to look at the fire, and promptly adopt appropriate measures if the flame spreads.
4. When installing the transport bridge, pay attention to safety and try to prevent the fire protection coating and galvanized layer from falling off the bridge.
Classification of cable trays
1. Cascade cable bridge
The CQ1-T stepped cable tray is designed based on relevant domestic and foreign data. It has the advantages of light weight, low cost, unique shape, easy installation, heat dissipation, and good ventilation. It is suitable for the laying of larger diameter cables, suitable for the laying of high and low voltage power cables.
2, tray cable tray
Tray type cable tray is the most widely used one in petroleum, chemical, light industry, telecommunication and so on. It has the advantages of light weight, large load, attractive appearance, simple structure, and easy installation. It is suitable for the installation of power cables and also for the laying of control cables.
3, trough cable tray
The trough cable tray is a fully enclosed cable tray. It is most suitable for laying control cables for computer cables, communication cables, thermocouple cables, and other highly sensitive systems. It has a good effect on the shielding interference of control cables and the protection of environmental cables during heavy corrosion.
4, large span cable tray
The current large-span cable trays are generally assembled from pultruded FRP profiles and are suitable for power cables, control cables, lighting cables and accessories. Compared with iron bridges, it has long service life (general design life is 20 years), easy installation and low cost (only 1/4 of the proportion of carbon steel, no need of hot work during construction, and the length of single bridge can reach 8 Meters, even longer), easy to cut, no need for maintenance and other advantages.
5, modular cable tray
The modular cable bridge is a new type of bridge and is the second generation of cable bridge series. It is suitable for laying of various projects, various units, and various cables. It has the characteristics of simple structure, flexible configuration, convenient installation and novel forms.
Editor's summary: The cable bridge installation specification and the classification of cable trays are introduced here, and we hope to help everyone. If you want to know more about yourself, you can follow the information on this site.
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