The mechanical strength is high, it has both the rigidity of the metal bridge, the toughness of the glass bridge, the good corrosion resistance, strong anti-aging, beautiful appearance, easy installation and long service life. Epoxy resin and epoxy resin composite cable tray is suitable for use in strong corrosive environment, large span and heavy load.
First, epoxy resin and epoxy resin composite cable bridge model specification:
Epoxy resin and epoxy resin composite type cable bridge model, from the structural point:
1, trough (C) 2, step type (T) 3, tray type (P)
Model specification for epoxy resin and epoxy resin composite cable tray:
Two. Selection of specifications for epoxy resin and epoxy resin composite cable tray:
The cable filling rate shall not exceed the standard stipulated value. The power cable shall be 40-50%, and the control cable shall be 50-70%. In addition, the development allowance of 10-25% should be reserved, and the selection of the cross section area of the bridge should be shown in the following table. A variety of bending and accessories should meet the requirements of the layout of the project, and supporting the bridge.
Three. Selection of load grade of epoxy resin and epoxy resin composite cable bridge:
In addition to its own weight, the cable tray shall also include the mechanical load of the wires and cables that it can withstand. The work load shall not be greater than the rated load under the selected load rating. The relative deflection of epoxy resin and epoxy resin composite shall not be greater than 1/200 when the cable tray is subjected to rated uniform load.
Material support hanger span mm rated uniformly distributed load N /m deflection value
(not greater than) mm
Side height 100mm, side height 150mm, side height 200mm
Epoxy resin composite
Epoxy resin and epoxy resin composite type cable tray load intensity is related to the reliability and durability of the structure, is an important basis for the structure design, in actual use, in addition to the cable cable tray loads and self weight, should also be considered as the load:
1, outdoor installation of cable bridge should take into account the wind, rain or ice load, for the earthquake prone area should also consider the inertia load.
2, the cable bridge in addition to bear normal mechanical load, in principle can not be used as a pedestrian channel. Special designs for this purpose shall be negotiated with the user for other purposes such as pedestrian access.
3, cable tray load design should not only consider the vertical load, but also consider the longitudinal and lateral loads in the installation process in the presence of (the longitudinal traction force, such as the laying of cables generated when the ladder against lateral load on bridge frame)
Four, epoxy resin and epoxy resin composite cable bridge support, hanger configuration:
1, indoor support and condole short span, generally use 1.5-3m. The outdoor column span is usually 6m.
2, non line support and hanger configuration should follow the following principles: when the bridge width of W<300mm, should be in the non line segment and line segment with linear 300-600mm is installed on the side of a bracket or hanger; when the bridge width of W>300mm, in addition to comply with the above conditions, the non line segment should also set up a central support or hanger.
3, bridge multi-storey settings, the distance between the center of 200, 250, 300, 350mm.
Five. Technical requirements for epoxy resin and epoxy resin composite cable tray:
Organization structure design is reasonable, with advanced technology, beautiful shape, smooth surface, uniform thickness, high mechanical strength, easy installation, corrosion and aging.
The material of epoxy resin composite lining, metal frame, metal frame and cable tray sections of the same shape, is made of cold-rolled steel plate, thickness of 1.5-2.0mm (150 = B = 400 = B = 300:1.5mm, 800:2.0mm) to the metal surface by special treatment, with the combination of soft layer to prevent the metal frame and the main anticorrosion layer for the coefficients of thermal expansion and delamination
Bridge in the metal skeleton, plus the main anti-corrosion layer, corrosion protection layer of the average thickness of 1.5mm-2.0mm, the proportion of 1.7-2.0g/cm3.
The main anti-corrosion layer must have high density, anti - damage, reflecting the role of ultraviolet protection layer, the surface smooth and beautiful, in order to improve the aging performance and service life of the cable tray.
Lining glass fiber cloth adopts three no (no alkali, no wax, no twist) glass fiber spinning.
The filling material is made of lightweight aluminium hydroxide to reduce its weight, thereby increasing the carrying capacity of the cable tray.
Any end bridge connecting surface and connecting holes, strong corrosion proof, anti external force measures.
The main anticorrosion layer, bonding layer and protective layer are required to be formed at once.
Have strong corrosion resistance, in the bad acid, alkali, salt, ammonia and other environments, service life of 30 years, not aging, not fading.
The oxygen resistance index of the cable tray shall be no less than 30%.
Connection bolts shall be made of stainless steel bolts.
Tray type cable tray