What do you need to consider when choosing a cable tray?

Selection of cable tray type and variety:

1. When the cable network that needs to be shielded from electrical interference or has the requirement of protecting the external (such as corrosive liquid, combustible dust and other environments), the (FB) trough composite anti-corrosion shielded cable tray (with cover) should be selected

2.In highly corrosive environments, (F) composite epoxy resin anti-corrosion and flame-retardant cable trays should be used. The same material should be used for the bracket and bracket to improve the service life of the tray and accessories, and the cable tray. In the environment or outdoor places that are prone to dust accumulation and other needs to be covered, it is advisable to add a cover.

3. In addition to the above conditions, tray type, trough type, stepped type, glass anti-corrosion flame retardant cable tray or steel ordinary cable tray can be selected according to the environmental and technical requirements of the site. In the environment or outdoor places that are prone to dust accumulation and other needs to be covered, it is advisable to add a cover.

4. In the public passage or outdoor crossing road section, the bottom of the bottom step should be added with a backing plate or a tray should be used in the section. When the large span spans the public passage, the load capacity of the bridge can be increased according to the user's requirements or the row frame can be selected.

5. Composite bridge (FB) should be selected for large span (>3m).

6. Composite epoxy resin bridge (F) should be used outdoors.

Now there are many cable tray manufacturers on the market, and the market is in bad competition, when Party A does not stipulate the brand, in the selection of cable tray manufacturers, it is necessary to pay attention to whether the manufacturer has production capacity, whether the qualifications are complete, how the product process quality, and so on. The surface of the bridge should not be twisted, blackened, rusted, etc.

1. When the cable tray is laid in the technical layer of various pipelines of related specialties and the ceiling of the upper part of the corridor, the distance between the bridge and the water supply pipeline and the air duct often cannot meet the requirements of the specification, and it is not convenient to open the cover plate of the bridge when maintenance is required. During the installation process, it is difficult to control if the relevant professional cooperation and technical data of the relevant professional pipelines are not done in advance. Regarding this work, can we draw a simple diagram in advance, the technical data of the integrated pipeline and the location of the bridge, the cross-section diagram of the size of each other, and reasonably adjust the distance between the professional pipelines to prevent the occurrence of common problems.

2. The filling rate of the cable in the tray exceeds the standard value. In the construction drawings, the most common only floor plan, even if there is a section is not very perfect, in accordance with the "steel cable tray engineering design code" article stipulates: its design content has:

1. Floor plan of the bridge system; 2. Relevant cross-sectional drawings of the bridge system; 3. The name and quantity of the pallet, ladder frame, straight section, bend, support and hanger required by the bridge system and the necessary description; 4. Non-standard technical descriptions or auspicious drawings with special requirements. Due to the imperfect design and other reasons, the local appearance of the placement of the cable too much, and even the phenomenon of full load, does not meet the provisions of the specification: the filling rate of the cable should not exceed the specified value of the relevant standard, the power cable 40, the requirements of the control cable 50.

In this regard, the supervisors should do a good job of pre-control measures, strictly require the construction unit to master the use of electrical engineering systems before purchasing the bridge, and make accurate statistics on the number of cables and cable sections in each bridge, and find that the specifications of the bridge should be changed in time with the design to effectively control the occurrence of quality problems. 3. The cable laid in the cable tray is not fixed and the cable is not marked: according to the specification

When the cable is laid vertically, it is fixed every 1-place, and when it is laid horizontally, the two ends of the cable, the turning and the straight section are fixed every 5-10m; The specification stipulates that signs (cable number, model and specification) shall be set at the head, end, turn and branch of the cable.

1.Daily maintenance: Use a clean soft cloth to wipe the surface dust frequently. Do not use damp cloths and hard objects to wipe the surface of Shantou paint, mirrors and glass. Do not come into contact with acids, alkaline chemicals and greasy substances.

2.Regular maintenance: Generally, it can be maintained once a quarter.

After the soft cloth cleans the surface dust, evenly wipe the surface with a special glazing wax, and then polish it with a clean soft cloth to prevent moisture. Hardware accessories and metal handles can be wiped and dried with less engine oil, so that they can rotate flexibly and prevent rust and oxidation.

3.It should be avoided in a hot and humid place, and the room should be kept ventilated and dry.

4.Avoid exposing surfaces to corrosive liquids such as alcohol, nail polish, etc.

5.A dry soft cloth should be used, and special maintenance wax should be used for the cable tray.

The tray model is divided into trough type, tray type, ladder type, the specifications are 300mm, 400mm, and the type of bridge mainly depends on the weight of the cable and the application environment. 2. The rigid structural system with closely connected support cables composed of straight sections, brackets, hangers, etc., which is composed of trough, tray or cascade type, is called cable tray. 3. The short span of indoor support and hanging is generally taken, and the middle span of outdoor columns is generally 6m.

It is recommended to consult a few more, make a comparison, from the ** and quality, as well as take a look at the word of mouth. Qingdao Bangcheng cable tray is good, and the local people use this brand of bridge.

The cable tray is composed of cable ladders, cable trays and metal trunking. The main materials are steel, aluminum alloy and stainless steel. So what are the types of cable trays? What are the characteristics and scope of application?

1. Cascade cable tray: improve the design according to relevant data at home and abroad.

Features: light weight, low cost, unique shape, easy installation, heat dissipation, good ventilation and other advantages.

Scope of application: It is suitable for the laying of cables with large diameters, and is suitable for the laying of high and low voltage power cables.

2. Tray cable tray: Tray-type cable tray is the most widely used in petroleum, chemical industry, light industry, telecommunications, etc.

Features: light weight, large load, beautiful shape, simple structure, easy installation and other advantages.

Scope of application: The tray cable tray is suitable for the installation of power cables, and is also suitable for the laying of control cables.

3. Trough cable tray: It is a fully enclosed cable tray.

Features: The trough cable tray has a good effect on the shielding interference of control cables and the protection of cables in heavy corrosion environments.

Scope of application: It is most suitable for laying computer cables, communication cables, thermocouple cables and other control cables of highly sensitive systems. The advantages and disadvantages of cascade, tray and trough cable trays:

The cascade type assembly cable tray has good ventilation performance, and is not dustproof and interference-proof. Trough and tray cable tray have dustproof and anti-interference performance.

4. Large-span cable tray: At present, it is generally assembled from pultruded FRP profiles, and has the advantages of long service life (general design life of 20 years), easy installation and low cost (the specific gravity is only 1 4 of carbon steel, no need to fire in construction, and the length of a single bridge can reach 8 meters, or even longer), easy cutting, no maintenance, etc.

Scope of application: suitable for power cables, control cables, lighting cables and accessories, etc.

5. Combined cable tray: It is a new type of tray, which is the second generation of cable tray series.

Features: The combined cable tray has the characteristics of simple structure, flexible configuration, convenient installation and novel form.

Scope of application: applicable to various projects, various units, and all kinds of cable laying

The bridge market is too chaotic, mostly relying on cutting corners in production, but also to find a brand comparison, mainly to see the thickness of the bridge materials, surface treatment, unit price to compare.

The most commonly used bridge is trough bridge and pallet bridge; The main thing to pay attention to is the quality of the steel plate itself and the thickness of the steel plate, followed by the spray paint on it, which is divided into ordinary spray paint and fireproof paint. The above two points are basically no problem.

At present, there are various brands and materials of bridge on the market, but if you want to reduce costs and pass the quality test, of course, you must choose carefully. There are a lot of them on the Internet, and we have a good view of our projects.

Hello dear, thank you for waiting, let me explain to you, 1, the width and height of the bridge according to the following standards and regulations, and should meet the cable true charge rate does not exceed the specified value of the relevant standard specifications, power cable can take 40-50%, control cable can take 50-70%, in addition to leave 10-25% of the formula development margin. 2. All kinds of bends and accessories should meet the engineering layout conditions and match the bridge. 3. The selection of support and hanger specifications should be configured according to the specifications of the bridge, the number of layers, the span and other conditions.

and should meet the requirements of the load. I hope you can be satisfied, give a thumbs up and encouragement, thank you!

The type of cable tray mainly depends on the weight of the cable and the use of the environment, etc., because of the fact that things have never been resolved, and the following provides us with some commonly used cable tray types on the market as a reference:

Trough cable tray: A trough cable tray is a hermetically sealed cable tray, box-like shape, used to lay cables.

Ladder cable tray: It looks like a ladder together, and the center is welded with a crossbar to reinforce the support of the front trembling, which makes it light in weight, low cost, extremely strong in bearing capacity, and good in breathable cover.

<> Tray Cable Tray: The tray cable tray is a semi-sealed cable tray, which is very similar to the posture of the trough cable tray, with holes in the bottom for heat dissipation.

The following is a guide to the commonly used standards in the market

The standard is suitable for: trough tray (C), ladder tray (T), tray tray (P) (special standards can be customized by contact).

Thickness: non-standard) national standard).

1.Whether the qualification of the cable tray manufacturer is complete, and whether to provide follow-up services 2Determine the width of the tray, the number of layers, the type and spacing of the support points, and the distribution of cables on each layer of tray.

3.Calculate the uniform load (kn m2) of each layer of cable, and preliminarily determine the model and specification of the tray.

4.The strength of the bridge is calculated according to the maximum total average load value of the cable.

When the cable network that needs to be shielded from electrical interference or has the requirement of protecting the external (such as corrosive liquid, flammable dust and other environments), the (FB) trough composite anti-corrosion shielded cable tray (with cover) should be selected.

1. The dirt and water in the trough should be eliminated before the bridge wiring;

2. Before the cable is deployed, the model specifications, programs, routes and locations should be checked to be consistent with the design regulations. The sum of the cross-sectional area of the conductors, including insulation, in the same tray should not exceed 40% of the internal cross-sectional area;

3. The layout of the cable should be straight, and there should be no twisting, looping and other phenomena, and it should not be squeezed and damaged by external forces;

4. The two ends of the cable should be labeled before deployment to indicate the starting and ending positions, and the label writing should be clear, upright and correct;

5. Power cables, signal cables, twisted pair cables, optical cables and cables of other weak current systems in the building should be separated and deployed. The minimum clear distance between each cable should meet the design requirements;

6. There should be redundancy when the cable is deployed. In the handover room, the length of the twisted pair cable between the equipment is reserved, generally 3 to 6 meters; The working area is to meters; The reserved length of the optical cable at the equipment end is generally 5 to 10 meters; If there are special requirements, the length shall be reserved according to the design requirements;

80*60 steel cable tray; wall thickness; Yuan meters;

100*50 steel cable tray; wall thickness; Yuan meters;

150*100 steel cable tray; wall thickness; Yuan meters;

200*100 steel cable tray; wall thickness; Yuan meters;

300*100 steel cable tray; wall thickness; Yuan meters;

Cable tray selection design:

1. Determine environmental conditions: There are generally three types of environmental conditions: corrosive environment, normal environment, and special environment.

2. Select the bridge: according to the cable load and the environment of the bridge installation, based on the load curve of the bridge, the type and specification of the bridge and the spacing of the columns, the length of the supporting arm, the level of the bridge, the length of the column, etc.

3. Large-span laying cables, large-span cable trays can be selected.

Fourth, . .The anti-corrosion measures of steel cable tray are: electrostatic spraying, hot-dip galvanizing, electro-galvanizing (suitable for light corrosion areas), hot-dip galvanizing, galvanized nickel alloy, etc. (suitable for heavy anti-corrosion areas). The thickness of the material used for the hot-dip galvanized cable tray needs to be above.

Guangzhou Qili Bridge Factory:

1. a cascade cable tray;

2. a tray cable tray;

3. a trough cable tray;

4. a large-span cable tray;

5. a combined cable tray;

There are too many, there are a lot of them, depending on the mess you need and the height length is generally 2 meters, which can be spliced, and there are matching connection accessories.