Professional Cable Tray Manufacturer

As an intelligent weak electricity system, bridge plays an important role in our daily life. 
But it will always show problems, causing confusion in our lives. 
What are the defects and maintenance items of the bridge frame? 
What are the problems with the bridge? 
1. Possible faults: all parts of the bridge show the appearance of a short circuit, which may lead to the operation of the current relay on the distribution cabinet, which is very serious to the damage caused by the bridge. 
two。
2. Defects that will occur: there is a short circuit inside the bridge, which is usually caused by the low quality of the cable, and there is no trace on the outside. 
3. It may show that the whole cable is burned or somewhere, making the cable severely damaged at the fault. 
4. The fault that may appear is that there is only one short circuit in the bridge, and the cable in the hairy place is slightly damaged, but there will still be obvious traces. 
5. Such problems may occur because the current is too high or the quality of the cable is too poor. 
6. When cable tray wiring is used indoors, the cable should not have an outer protective layer of jute or other flammable materials. 
7. When cable tray wiring is used in corrosive or particularly humid places, corresponding protective measures should be taken according to different corrosion media, and plastic sheathed cables should be selected. 
8. The height of the cable tray (tray) should not be less than 2.50m when installed horizontally, and the part below 1.80m should be protected by metal cover during vertical installation, except when it is laid in the special electrical room (such as power distribution room, electrical shaft, technical floor, etc.). 
9. When the cable tray is installed horizontally, the best span should be selected according to the load curve, and the span is generally 1.5-3m. 
When laying vertically, the distance between fixed points should not be more than 2m. 
10. When several groups of cable bridges are installed in parallel at the same height, the maintenance and overhaul distance between the adjacent cable bridges should be considered. 
11. The cable can be laid without spacing on the cable tray, and the filling ratio of the cross section of the cable in the tray: the power cable should not be more than 40%; the control cable should not be more than 50%. 
twelve。
The following cables with different voltages and different uses should not be laid on the same layer of bridge: if they need to be installed on the same layer of bridge due to conditions, they should be separated by partition. 
Maintenance items of bridge frame. 
1. 
Test and check the operation status of the balance cylinder of the bridge equipment and the oil circuit and joint of the oil lubrication system. 
two。
2. The friction between the bridge equipment slider and the guide rail is relatively frequent, so necessary adjustments should be made to check the lubrication quality of the joint and the pipeline to ensure good operation. 
3. Regularly lubricate the gear parts of the bridge equipment: the gear box and internal parts are more likely to be damaged and loosened because of frequent operation. 
When there is noise in these parts, it can be lubricated first, and then according to the vibration, check the oil output and pressure test of the oil injection points between the systems, and make appropriate adjustments. 
Factors affecting the bearing capacity of bridge truss. 
4. Dynamic load refers to the weight of construction and maintenance personnel in the process of installation and maintenance of cable bridge. 
For the light cable tray, the dynamic load is generally not considered, that is, people are not allowed to stand on the bridge. If the station person needs to be considered, the span should be appropriately reduced. 
5. The static load refers to the type and number of cables laid in the cable tray, the outer diameter weight / unit length of each cable, and the statistics according to the different routes of the cable laying. 
6. The additional load only outside refers to the load formed by ice, snow, wind and electromagnetic force, which is related to the natural meteorological conditions of the installation site and the nature of the charged body, and should be calculated according to various conditions in the design.