Hello everyone, I'm Brother Xue. Weak current engineering often uses bridges, can you distinguish various types of bridges?
Cable trays
Supporting projects for wiring engineering
A tray is a bracket that supports and puts cables.
The bridge is very common in engineering, as long as the cable is laid, the bridge must be used;
The cable tray is divided into trough cable tray, tray cable tray and cascade cable tray, grid tray and other structures, which are composed of brackets, brackets and installation accessories.
CABLE TRAY…
Cable & Tray
Bridge & Introduction
Cable Tray…
As a supporting project of the wiring project, the cable tray has no special specification guidance at present, and the specifications of each manufacturer lack of universality, therefore, the design and selection process should be based on the type and quantity of the cable of each weak current system, and the applicable bridge should be reasonably selected.
Can be erected independently, can also be laid on a variety of buildings (structures) and pipe gallery supports, reflecting the characteristics of simple structure, beautiful shape, flexible configuration and convenient maintenance, all parts need to be galvanized, installed in the open air outside the building bridge, if it is near the sea or belongs to the corrosion area, the material must have anti-corrosion, moisture resistance, good adhesion, high impact strength physical characteristics.
CABLE TRAY…
Production & Process
Process & Flow
Cable Teay…
Cable tray is the full name of a rigid structural system with closely connected support cables composed of straight sections, bends, components, support arms (arm supports), hangers, etc. of pallets or ladder frames.
Tools/Raw Materials:
It is an authoritative technical reference for design selection and transaction guarantee, cable raw materials, cable accessories, cable equipment, cable trays, cable trays, construction tools, cable connectors, etc.
CABLE TRAY…
Bridge & Sorting
Bridge & Sorting
Cable Tray…
Cable tray is a product derived from the protection of cables, which is the protective shell of the cable to prevent the cable from being damaged by external factors. It is mainly composed of brackets, brackets and installation accessories, and the main types of trays can be divided into ladder trays, non-perforated tray trays (trough trays), perforated tray trays (tray-type cable trays), large-span cable trays, etc.
Trough cable tray
A trough cable tray is a fully enclosed cable tray. The trough parts bent from the whole steel plate are conceptually different from the tray in terms of height and width ratio, the tray is shallow and wide, and the trough cable tray has a certain depth and closure.
Tray cable tray
The pallet tray is semi-sealed, very similar to the galvanized trough tray.
The surface treatment of tray cable tray can be divided into three types: galvanizing, electrostatic spraying and hot-dip galvanizing according to user needs, and special anti-corrosion treatment can be done in heavy corrosive environments.
Ladder cable tray
The appearance of the ladder cable tray is like a ladder, and the middle is welded with a crossbar to reinforce the support, which makes it light in weight, low cost, extremely strong in bearing capacity and good in air permeability;
CQ1-T cascade cable tray is designed according to relevant data at home and abroad.
Large-span cable trays
The long-span cable tray is generally assembled from pultruded FRP profiles, which is suitable for power cables, control cables, lighting cables and accessories.
CABLE TRAY…
Material & Classification
Material & Classification
cable Tray…
Cable trays can be classified according to materials: galvanized trays, stainless steel trays, aluminum alloy trays, fireproof trays, sprayed trays, and hot-dip galvanized trays.
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CABLE TRAY…
Products & Introduction
Products & Introduction
Cable Tray…
The rigid structural system with closely connected support cables composed of straight sections, bending, tee, and quad components, supporting arms (arm brackets), hangers, etc., is called cable tray (referred to as bridge).
Cable tray | Product Information | Precautions
Why do some cable trays need to be sprayed and sprayed, and what is the function?
Sprayed cable tray is a layer of coating paint after surface treatment, hot-dip galvanized cable tray (hot-dip galvanized), ordinary sprayed cable tray, fireproof cable tray, these three types of cable tray are required to go through surface treatment, with ordinary galvanized cable tray surface treatment of the cable tray function is to strengthen the performance of the cable tray itself.
Sprayed cable tray:
The sprayed cable tray is sprayed with electrostatic powder spraying equipment to spray powder coating onto the surface of the tray, which strengthens the waterproof, rust-proof and anti-static of the cable tray itself, and enhances the load capacity.
Hot-dip galvanized cable tray:
Hot-dip galvanized cable tray is also known as "hot-dip galvanized cable tray" after high-temperature hot-dip galvanizing pool, soaked, hot-dip galvanized cable tray can mainly play an anti-corrosion role, its anti-corrosion performance is up to 20 times higher than ordinary galvanizing, the country's requirements for hot-dip galvanized steel are becoming more and more stringent, many major projects are hot-dip galvanized, high corrosion resistance, reduce maintenance costs.
Fireproof cable tray:
The fireproof cable tray is made of steel galvanized cable tray shell processing fireproof paint, sprayed with fireproof paint inside and outside, playing the role of heat insulation, fire breaking, fire performance, the average thickness of the insulation layer is 25mm, and the paint expands when the fireproof cable tray is fired, preventing the fire from continuing to burn.
The difference between cold galvanizing and hot galvanizing is that the technology used in them is different. Cold galvanization is to coat the surface of angle steel, channel steel and other metals with zinc layer, which is used to achieve convenient beauty and metal rust prevention.
The hot-dip galvanizing plant uses zinc-tin solution to protect the workpiece, and this new technology can extend the anti-corrosion time by up to five times, and this technology is usually used in outdoor construction.
The thickness of the galvanized layer is 5~15μm, and the hot-dip galvanizing layer is generally more than 35μm, because the hot-dip galvanizing is to immerse the derusted steel parts in the molten zinc melted at about 500 °C, so that the zinc layer is attached to the surface of the steel components, so as to play the purpose of anti-corrosion. Therefore, hot-dip galvanizing is not comparable to cold-dip galvanizing, and the life corrosion resistance of hot-dip galvanizing is much stronger than that of cold-dip galvanizing.
The life of hot-dip galvanized bridge is longer than that of galvanized bridge, and hot-dip galvanizing has an absolute advantage in terms of hardness and impact resistance.
So, how to distinguish between hot-dip galvanized tray and galvanized tray?
- In terms of color, the appearance of the hot-dip galvanized bridge is bright white, and the appearance of the galvanized bridge is a little darker; in terms of flatness, the hot-dip galvanized bridge is thicker than the general galvanized bridge, and the appearance of the galvanized bridge is rougher, and the appearance of the galvanized bridge is flatter.
- The production process is different, the hot-dip galvanized bridge is passed through the zinc pot solution, and the galvanized bridge is obtained through the electrode reaction.
- The process of galvanizing bridge: the steel surface is cleaned and put into the electroplating solution, which contains zinc oxide. The direct current is connected to the steel at the first level, and the zinc plate is connected to the electroplating solution at the first level. After the power is applied, the zinc is replaced in a molecular state to the surface of the steel. If purified with brightener, it will show cloud-like bright galvanizing.
- Process process of hot-dip galvanized bridge: the process and method of immersing steel or castings in molten zinc, and its appearance constitutes zinc---ferroalloy or plating and zinc---ferroalloy overlay.
- The hot-dip galvanized coating is thicker, and the corrosion resistance can be stronger. The cold-dip galvanized layer is brighter than the hot-dip galvanized layer, but it is thinner and the corrosion resistance is weaker.
- The cold galvanizing applied to the steel structure is generally not very good anti-rust effect, mainly because the amount of galvanization is not reached, and the galvanization is uneven, generally two or three years on the rust phenomenon, poor quality exposure to the wet environment for more than ten days on rust. Therefore, the cold galvanized tray is suitable for use in the drying chamber. The hot-dip galvanized tray is completed by surface galvanizing, and the corrosion resistance of this surface treatment is very strong, so it is often used in humid areas such as the seaside.
Production process of impregnated galvanized bridge:
The process of immersing a surface-clean metal wire groove in molten zinc and using the physicochemical reaction that occurs at the interface to form a layer of metallic zinc on the surface.
Loading→ pickling, washing→ solvent → drying→ hot-dip galvanizing→ passivation→ inspection → packaging.
It has a long service life, a high degree of industrialization and stable quality. Therefore, it is widely used in outdoor steel structures that are seriously corroded by the atmosphere and are not easy to maintain.
Hot-dip galvanized bridge, rainproof and rust-proof, durable, suitable for outdoor, subway stations, photovoltaic power stations, etc.
The following is an on-site installation diagram of a photovoltaic power station
Hot-dip galvanizing: It is made of cold-rolled steel plate, the surface process is hot-dip galvanized, and it is composed of straight sections, bending, tee, and crosses of pallet type, trough type, cross assembly, and bracket (arm bracket), hanger, etc., which is the full name of the rigid structural system with close support cables.
Introduction to the thermal process
Among the various coating methods for maintaining steel substrates, hot-dip galvanizing is one of the highest quality. It is in the state of zinc in a liquid state, after a very complex physical and chemical action, not only coated with a thick layer of pure zinc on the steel, but also formed a zinc-iron alloy layer. This plating method not only has the anti-corrosion characteristics of electro-galvanizing, but also has a zinc-iron alloy layer. There is also a strong corrosion resistance that cannot be compared with electrogalvanizing. Therefore, this plating method is very suitable for a variety of strong acid, alkali mist and other strong corrosive environments.
Where is it generally used?
The use of hot-dip galvanized bridge is also relatively expanding along with the development trend of industry and agriculture. Therefore, hot-dip galvanized bridge has been widely used in industry (such as chemical equipment, petroleum processing, marine exploration, metal structure, power transmission, shipbuilding, etc.), agriculture (such as: sprinkler irrigation, ambiguous house), housing construction (such as: water and gas transmission, wire casing, scaffolding, housing, etc.), bridges, transportation and other fields. Due to the characteristics of hot-dip galvanized products with beautiful appearance and good corrosion resistance, their application range is becoming more and more extensive.
Advantages of hot-dip galvanized trays
It has good anti-corrosion characteristics, long service life, much longer service life than ordinary bridge, high degree of production industrialization, and stable quality. Therefore, it is widely used in outdoor environments where atmospheric corrosion is more serious and not easy to maintain.
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