1. Product Overview
XQJ series cable tray is improved according to relevant information at home and abroad and similar products of our factory. It has the characteristics of complete variety, wide application, high strength, light structure, low cost, simple construction, flexible wiring, installation standards and beautiful appearance, which brings convenience to technical improvement, cable expansion, maintenance and overhaul.
XQJ series cable tray is equipped with a shield, when a shield is required, it can be indicated when ordering or ordered according to the shroud model, and all its accessories are common to pallet and trough bridges.
The surface treatment of XQJ series cable tray is electrostatic spraying, galvanizing, hot-dip galvanizing, and electrostatic spraying anti-corrosion treatment can be used in heavy corrosion environments. The large-span bridge can be made into L (length) = 4, 6, 8, 12m (m) according to the customer's choice, and the XQJ series cable tray required by the user is beyond the scope of this standard. You can also come to the drawing, letter or face to face, our factory as far as possible to meet your requirements.
2. Product use:
It is suitable for power cables with a voltage below 1O kV, as well as indoor and outdoor overhead such as control cables and lighting wiring, as well as laying cable trenches and tunnels.
1. XQJ series steel cable tray has the characteristics of complete variety, wide application, light structure, high strength, low cost, simple construction, flexible wiring, installation standards, beautiful appearance, etc., which brings convenience to the technical transformation of industrial and mining enterprises and the maintenance and repair of expanded cables.
2. LQJ series aluminum alloy anti-corrosion bridge, after the oxidation treatment of the surface of the high-strength corrosion-resistant aluminum alloy standard profile, is assembled by stainless steel fasteners or rivet fixation, which overcomes the drawbacks of general fasteners that are easy to corrode. It should have the characteristics of simple structure, novel style, large load, light weight, corrosion resistance, long service life, easy installation, no maintenance, suitable for general environmental areas, used in high temperature and corrosion environment in coastal salt spray areas, and can show that it maintains the superiority of corrosion resistance, and is an ideal product for laying cables.
3. BQJ series glass flame retardant bridge is a new type of product made of FRP fiber anti-corrosion material, which has the advantages of high strength, good insulation, light weight, reasonable structure, flexible wiring, anti-corrosion, acid prevention, fire prevention, long life and easy installation.
product selection notes:
1. Determine the environmental conditions
There are generally three types of environmental conditions: rotten environment, normal environment, and special pearl environment.
2. Determine the direction
According to most cable directions, you can walk along walls, columns, beams, floors indoors, and along process pipelines as much as possible outdoors.
3. Calculate the load
calculated as the unit length of the cable tray on the transverse number of the cable tray, the weight of the cable< span lang="EN-US">q and the total load G 。
G< total span lang="EN-US">=n1q1+n2q2+.... q1、q2、q3..... qn is the unit weight of each cable(kg/m)n1, n2, n3... nn is the number of roots of the same cable<span lang="EN-US">G total <span lang="EN-US"><G allowed
4. Select the bridge
According to the cable load and the environment of the bridge installation, the material type and specification of the bridge and the spacing of the column, the length of the support arm, the level of the bridge, the length of the column, etc. are determined based on the load curve of the bridge.
determine the fixing method of the bridge according to the cable direction and installation environment: hanging, upright (both forms can be fixed on one or both sides), wall-side type, etc.
the layered installation and interlayer distance of various cable trays on the cable frame.
The arrangement of the cable tray level is: weak current control cable at the top, and then general control cable, low-voltage power cable, high-voltage power cable are arranged down in turn (see the table below), which is conducive to screen interference, ventilation, heat dissipation, etc.
|
hierarchy
|
cable use
|
used cable tray type
|
|
on
down
|
computer cables
|
tray or slot with cover, fully enclosed
|
|
screen malpractice cable
|
tray or slot with cover, fully enclosed
|
|
general control cable
|
tray or slot shelf with cover
|
|
low-voltage power cable
|
tray or slot shelf with cover
|
|
high voltage power cable 1.5-3kv
|
tray with lid
|
|
UHV power cable 35kv
|
tray with lid
|
the interlayer distances of various layers of cable trays are: control cable≥200mm, power cable ≥300mm。 Mechanized cable≥400mm.
When the fixing method of the bridge frame adopts suspension type and the support arm is single-sided multi-layer installation, in order to balance the force of the column, the symmetrical load method should be selected to lay the cable tray.
long-span laying high-altitude cable, long-span cable tray can be selected.
cable tray should use protective cover plates when passing through areas susceptible to external mechanical damage and sun exposure areas.
Various alternative connections can be used when cable ducts or truss-type ladder frames need to be converted into branches.
XQJ steel cable tray anti-corrosion measures: electrostatic spraying, galvanized passivation, electro-galvanizing (suitable for light anti-corrosion areas) zinc-nickel alloy, etc. The thickness of the material used for hot-dip galvanized cable tray needs to be increased by more than 0.5mm.
The support spacing of the power cable tray should be less than the allowable support span. The width should leave a certain spare space for adding cables later.
When there are fewer power cables and control cables, it can be installed on one cable rack, but the power and control cables are separated by a partition in the middle.
Cable trays are laid horizontally, and the connection of the bridges should be as far as possible at the 1/4, and the horizontal direction of the cable is every second 2m fixed once, vertical direction cable1.5m fixed once.
The cable tray should be reliably grounded, and if it is a grounding trunk, the end of the bridge should be connected in parallel with the soft copper wire (cross-sectional area16mm2) and communicate with the main grounding wire. The long bridge is grounded every < span lang="EN-US">30-50m.
