Among all the devices and devices to protectfrom fire a special place is occupied by fireproof roller blinds. They are distinguished by compactness, quick response, efficiency in the process of use. Due to their design, they can be installed in various premises. Installation of fire curtains is carried out to protect door, window openings, individual elements, mechanisms and devices. They are used for zoning of space, separation of corridors. Next, we consider in more detail what are fire curtains.
Appointment
Automatic flame retardant curtains andfireproof curtains, as well as gates, doors and other barriers, prevent the spread of smoke, fire. Their task is to retain toxic products from one side and oxygen from the other side. Among other things, fireproof curtains are today considered to be quite an effective means of extinguishing. If fresh air is stopped, the flame can go out on its own. If fire retardant devices are used in conjunction with automatic extinguishing systems of the foam, gas or water type, the elimination of fire can be carried out without human intervention.
Performance properties
Fire curtains are made of a material with the following properties:
- Strength.
- Flexibility.
- Low weight.
- Airtight.
- Resistance to the effects of atmospheric phenomena.
- High level of chemical resistance.
- Low thermal conductivity.
Production features
The most suitable material for makingFireproofing devices is considered to be fiberglass today. For its production are used refractory glass, similar to those used in barriers and partitions. In order to increase the level of mechanical strength, each fiberglass thread is reinforced with steel wire or the entire surface of curtains is reinforced with stainless steel mesh. The outer curtains of the hull (drive mechanisms are located in them and the sheet itself is inoperative) is equipped with heating. The material of the curtain itself is processed with silicone. This helps to reduce the negative impact of moisture and temperature changes on the product, and also ensures the normal operation of the device in any weather.
Design features
Fire curtains, the price of which variesfrom 7 to 7.8 thousand rubles., can be installed both inside and outside the premises. In the upper part of the door or window opening there is a cylindrical housing made of stainless or galvanized steel. It contains a shaft on rollers or bearings. They provide ease of rotation in both directions. With the help of a reducer, one edge of the shaft is connected to an electric motor that operates to lift the blade when it is opened. When not in use, the curtain is fixed along the top edge of the shaft along its entire length and wound tightly on it. A special metal tire runs along the bottom edge. It performs several tasks at once:
- Hold the canvas in expanded form.
- The direction of the cuts along the side sealing structures.
- Curtain unwinding under its own weight.
- Closing the housing slot inoperative.
Some designs have mechanismsthe movement of the canvas, not only in the vertical but also in the horizontal direction. These products differ only in the features of the electric drive. It functions both on closing and opening the curtain.
The mechanism of work
Для удержания полотна в верхнем положении в The design provides an electromagnet. It is part of a permanently energized electric motor. Upon receipt of a signal from the central control or fire warning device, the circuit is opened. As a result, freeing the tire falls down and stretches the canvas. The curtain on its lower edge fits snugly to the structural element of the frame structure. The side sections are located inside the respective guides, or pressed against the perimeter of the opening. The folding of the web is carried out when a manual button or automatic switching system is activated. As a result, the electric motor drives the winding shaft. The design also contains limit switches. They are installed directly on the engine and turn it off automatically when the lower bus reaches a certain position. If the enclosure is suspended at some distance from the ceiling, then the entire upper part must be carefully sealed. In Russia, the most popular are fire protection curtains EI 60. Consider further the scope of their use.
Application
High fire resistanceEI 60 curtain structures allow you to use them in the protection of not only warehouse or technical premises. They can be installed in shops, educational institutions, sports facilities and other objects of permanent finding of people. Designs restrain the spread of open flame and heat for an hour. Products are produced that can withstand fire for a longer time. This leads to the use of devices in brick and concrete structures. In wooden and temporary buildings such structures are not used, as a rule.
Product Dimensions
They can be very diverse.Some curtains have impressive parameters. The width of individual products can reach 50, and the height - 10 meters. Due to this, it is possible to fence off the premises of a large area. In such large-sized structures, special openings are provided for moving people during evacuation and providing firemen with access to the outbreak. Fire retardant canvases with loopholes are as resistant as deaf ones. Passages are mounted at the junction of individual longitudinal parts. Neither cold nor hot smoke penetrates through such loopholes.
