發布人：http://www.bj-dcpj.com 發布時間：2021-11-24 20:04:45
Fireproof rolling shutter door is a kind of fireproof and thermal insulation facility suitable for large openings in buildings. The product plays a certain role in design and installation. Fireproof rolling shutter door is widely used in the fire compartment of industrial and civil buildings, which can prevent the spread of fire and ensure life and property. It is an indispensable fire-fighting facility in modern buildings. The following is the analysis of six problems in Jinan fireproof rolling shutter door industry.
1、 Thickness of fireproof rolling shutter door curtain body
The thickness of the door curtain is the thickness of the steel plate used for the door curtain. At present, the phenomenon of Jerry building is widespread. Some manufacturers use thicker steel curtain panels when sending them for testing. After obtaining the certificate, they use thinner products for production. Because the thickness of the rolling shutter plate of the rolling shutter door on the installation site is difficult to measure and easy to muddle through, many fire-proof rolling shutter doors can not meet the requirements due to the thickness of the rolling shutter, which reduces the service life and fire resistance time limit.
2、 Lintel structure of fireproof rolling shutter door
Lintel structure: according to national standards, lintel structure shall be set for fireproof rolling shutter door. At present, lintel free fireproof rolling shutter doors are widely used, which can not prevent the strong upward impact of the fire in case of fire, resulting in the outward diffusion of smoke through the lintel. The sealing of lintel is the key to fire and smoke prevention. If the fire rolling shutter door without lintel structure is installed, it can not play the role of fire barrier, which is futile.
3、 Guide rail of fireproof rolling shutter door
The problem with the guide rail is that the guide rail is not deep enough and the structure and material are improper. These are common problems in the installation of many large rolling shutter doors. The guide rail of large rolling shutter door shall generally have main components that can bear high strength. However, many manufacturers use simple lightweight guide rails to replace it. In case of fire, the door curtain is easy to fall off from the guide rail and cannot play the role of fire prevention.
4、 Fireproof rolling shutter door bottom curtain
Roller shutter door threshold problem some products do not have a threshold, some products have a threshold, but the material is very thin. The bottom beam of the door curtain is an important component to maintain the strength of the door curtain. If there is no sill under the door curtain, it means that there are fewer solid frames at the lower part of the door curtain, and the fire negative pressure will overturn the whole door curtain.
5、 Strength of transmission device of fireproof rolling shutter door
The strength of the shaft transmission device of the fireproof rolling shutter is also an important parameter of the rolling shutter door. At present, the strength of many products is unqualified, which seriously affects the use of fireproof rolling shutter doors. The structure of the roller shutter shaft is mainly the depth and structure in which the shaft heads at both ends of the roller shutter shaft are inserted into the steel pipe. The depth of shaft head plug is about 1 / 10 of the shaft length, and there shall be two flanges and sufficient welds. Some manufacturers have products with short filling and even flanges. This inferior door is in danger of being broken after a period of use.
6、 Transmission problem of manual control of fireproof rolling shutter door
In case of power failure, the transmission problem of manual quick closing device is fire. When the power supply is interrupted, the field personnel can use the manual quick release device to close the door. At present, some fireproof rolling shutter doors are not equipped with this device. Even if installed, it often fails to work due to quality problems.