How is a fire tray defined and what does it include?

The structure of the fireproof cable tray, the surface of the fireproof cable tray has a frosted feeling, and is generally used in the distribution circuit of fire-fighting equipment, including the fire control room, the fire pump, the fire elevator, the smoke exhaust fan and the automatic fire alarm system.

The fireproof cable tray is required to have a fire-resistant time of more than 1h in the underground garage. In the section where the bridge is required to be fireproof, a fire-resistant or flame-retardant board or mesh material can be added to the pallet and ladder frame to form a closed or semi-enclosed structure.

And the surface of the bridge is coated with a fireproof coating that conforms to the CECS24, 90 "Technical Specifications for the Application of Fireproof Coatings for Steel Structures", and its overall fire resistance should meet the requirements of relevant national norms and standards.

The fireproof bridge is sprayed with a layer of fireproof paint on the surface of the ordinary bridge to play the role of fireproof and flame retardant!

Fireproof bridge: Fireproof bridge is suitable for laying power cables below 10kV, as well as indoor and outdoor overhead cable trenches and tunnels such as control cables and lighting wiring.

The fireproof bridge is mainly composed of glass fiber reinforced materials and inorganic adhesives, composite fireproof boards and metal skeletons and other fireproof substrates. The outer layer is added with fireproof coating, the fireproof bridge will not burn after fire, so as to prevent the spread of fire, has an extremely good fireproof and fireproof effect, and has fire-resistant, oil-resistant, corrosion-resistant, non-toxic, pollution-free, the overall installation is convenient, the structure is reasonable, the service life is long, and beautiful, the cable is installed in the cable tray, the environment is clean and clean, and the cleaning is convenient. Fire-retardant coatings have the characteristics of thin coating, high fire resistance limit and strong adhesion.

The fireproof bridge is sprayed with a layer of fireproof paint on the surface of the ordinary bridge to play the role of fireproof and flame retardant! In fact, the bridge itself will not catch fire, it may only be the cable, and the fireproof paint plays a fireproof and flame-retardant principle.

The protective thickness of the fireproof tray is required according to Table 10 of JB T 10216-2000 "Cable Tray for Electronic Control and Power Distribution", and the electroplating is greater than 12 m, the hot plating is greater than 65 m, the plastic spraying is greater than 50 m, and the fire protection is greater than 500 m, which can be measured with a thickness gauge.

The difference between fire-resistant bridge and fireproof bridge is: different shell structure, different fire burning temperature, and different fire resistance time.

First, the shell structure is different.

1. Fire-resistant bridge: The shell and thermal insulation layer of the fire-resistant bridge are made of fireproof materials with high temperature resistance of 1100 and insulation materials with high temperature resistance of 300.

2. Fireproof bridge: The shell of the fireproof bridge is added with a fireproof partition, and some shells are coated with fireproof coatings.

Second, the fire combustion temperature is different.

1. Refractory bridge: The fire combustion temperature of the refractory bridge will only burn when the high temperature of 920 1050 is reached.

2. Fireproof bridge: The fire burning temperature of the fireproof bridge reaches about 800 degrees.

Third, the fire resistance time is different.

1. Refractory bridge: The refractory time of refractory bridge is 60 minutes, 90 minutes, 120 minutes and 180 minutes.

2. Fireproof bridge: The fireproof bridge has 30 minutes, 40 minutes, and 60 minutes.

Yes. The protective thickness of the fireproof tray is required according to Table 10 of JB T 10216-2000 "Cable Tray for Electronic Control and Power Distribution", and the electroplating is greater than 12 m, the hot plating is greater than 65 m, the plastic spraying is greater than 50 m, and the fire protection is greater than 500 m, which can be measured with a thickness gauge.

For sections that require the bridge to be fireproof, plates and nets with fire-resistant or flame-retardant materials can be added to the tray and ladder frame to form a closed or half-time closed structure, and the surface of the bridge can be coated with a chain brush in accordance with CECS 24; 90 "Technical Specifications for the Application of Fireproof Coatings for Steel Structures" of the fireproof coating, its overall fire resistance should meet the requirements of the relevant specifications and standards of the national dust mujia.

1.The shell and insulation layer of the fire-resistant mother cable tray are made of fireproof materials with high temperature resistance of 1100 and insulation materials with high temperature resistance of 300, and the fire-resistant cable tray has a fire-resistant time of 60 minutes, 90 minutes, 120 minutes, and 180 minutes, and will burn when the temperature reaches the high temperature of 920 1050, and the full load operation can reach more than 8 hours.

2.Fireproof cable tray: ordinary cable tray or fireproof smoke spread cable tray shell plus fireproof partition, some shells are coated with fireproof coatings, which can achieve fire within the specified time The heat energy can be transmitted to the inside, the fireproof cable tray can operate normally, the fire burning temperature reaches about 800 degrees, and the fireproof cable tray fire-resistant time is 30 minutes, 40 minutes, and 60 minutes respectively.

3.The thickness of fireproof paint is required to be greater than or equal to 1mm, which is the general and absolute fireproof paint effect, which also has the difference between cheap and expensive, and the expensive effect is better.

4.The fireproof electric call is a steel shell, a double-layer fireproof cover, and an inorganic fireproof groove box. The average thickness of the insulation layer is 25mm, the double-layer cover plate is ventilated and dissipated, and the fireproof coating is sprayed inside, and the paint expands when the fireproof cable tray is fired, blocking the heat dissipation holes and protecting the cables in the slot box.

The fire performance of the inorganic fireproof groove box has been tested by the National Fixed Fire Resistance Inspection Center for 60 minutes, and the cable is not damaged. The structure of the support is good, which can effectively fix the inorganic fireproof groove box.

It's not the same concept. The fireproof bridge can be closed or not, and the airtight fireproof bridge must be closed and sealed.