1、 Curtain thickness

济南防火卷帘门的门帘是用钢板制成的，采用钢板厚度。目前普遍存在着偷工减料现象:制造商采用的窗帘在正式生产前进行交货检查，一部分制造商在进行交货检查时采用厚钢板的窗帘，取得合格证后，改变了薄的生产。由于在安装现场卷帘门的帘板厚度不易测量，容易蒙混过关，因此，有很多卷帘门因门帘厚度都未达到要求，降低使用寿命与耐火时限。

The curtain of Jinan fireproof rolling shutter door is made of steel plate with steel plate thickness. At present, there is a common phenomenon of cutting corners on work and materials: the curtains used by manufacturers are subject to delivery inspection before formal production, and some manufacturers use thick steel curtain during delivery inspection. After obtaining the certificate of conformity, the production of thin curtain is changed. Because the thickness of the shutter plate of the rolling shutter door is difficult to measure at the installation site, it is easy to muddle through. Therefore, many rolling shutter doors fail to meet the requirements due to the thickness of the shutter, reducing the service life and fire resistance time limit.

二、门楣结构

2、 Lintel structure

门楣，也叫门眉，是门框上部的横梁。根据的规定，防火门需要设置门灾结构。如果安装的防火卷帘门没有门楣结构，就不能起到防火阻隔的作用，形同虚设。目前，没有门楣防火门，当有火时，尤其是当火势很强烈时，这种幕门不能防止火势向上强烈冲击，应该设置门楣处会成为烟气蔓延的地方。

The lintel, also known as the door eyebrow, is the beam on the upper part of the door frame. According to national regulations, fire doors need to be equipped with door disaster structure. If the installed fireproof rolling shutter door has no lintel structure, it can not play the role of fire barrier and is in vain. At present, there is no lintel fire door. When there is a fire, especially when the fire is very strong, this kind of curtain door can not prevent the upward strong impact of the fire. It should be set at the lintel where the smoke will spread.

三、检查帘门预卷

3、 Check the pre rolling of curtain door

按照通常的门帘放在底部时，上部需要留有门帘，以减少门帘的重量对螺钉的拉力，防止一个门板破裂。但现在的卷帘门普遍没有做到这一点。窗帘卷在天花板里，检查时无法感知，使用时间变长后有窗帘掉落的危险，以后患难不断。

According to the usual door curtain, when it is placed at the bottom, a door curtain needs to be left at the upper part to reduce the tension of the weight of the door curtain on the screws and prevent a door panel from cracking. But now rolling shutter doors generally do not do this. The curtain is rolled in the ceiling and cannot be perceived during inspection. There is a risk that the curtain will fall after being used for a long time, and there will be constant trouble in the future.

四、门帘底梁

4、 Curtain sill

有的济南防火卷帘门没有底梁，有的卷帘门虽有底梁，但用料单薄，这样有什么风险?沿着门帘的底梁保持门帘的强度的重要部件，门帘下面没有底梁就等于门帘下部没有坚固作用的边框，火场负压将整个门帘打开。

Some Jinan fireproof rolling shutter doors do not have bottom beams, and some rolling shutter doors have bottom beams, but the materials are thin. What are the risks? Along the bottom beam of the door curtain is an important component to maintain the strength of the door curtain. If there is no bottom beam under the door curtain, it is equal to the frame with no firm effect at the lower part of the door curtain. The negative pressure of the fire site will open the whole door curtain.

五、导轨设计

5、 Guide rail design

导轨深不够，结构和材料不当是大型防火快门安装中常见的问题。大型卷帘门导轨上一般应有一根能承受高强度的主构件，然而很多厂商用简易的轻型导轨来代替，一旦遇到火灾，门帘易从导轨脱出，根本起不到防火作用。

Insufficient guide rail depth and improper structure and material are common problems in the installation of large fire shutter. Generally, the guide rail of large rolling shutter door should have a main component that can bear high strength. However, many manufacturers use simple light guide rail to replace it. In case of fire, the door curtain is easy to come out of the guide rail and can not play the role of fire prevention at all.

防火卷帘门

Fireproof rolling shutter door

六、卷帘轴强度

6、 Roller shutter shaft strength

滚轴的强度也是防火闸门的重要参数，强度不合格严重影响防火闸门的使用。合理的插头深应该是轴长的1/10，有两个法兰和足够的焊缝。有些厂商的产品塞入很短，甚只用一个法兰，这种偷工减料的门使用一段时间后就会有断裂的危险。

The strength of roller is also an important parameter of fire gate. Unqualified strength seriously affects the use of fire gate. The reasonable plug depth should be 1 / 10 of the shaft length, with two flanges and sufficient welds. Some manufacturers' products are stuffed for a short time, or even use only one flange. This shoddy door will be in danger of breaking after being used for a period of time.

七、传动链条

7、 Drive chain

传动链条是根据卷门机的提升重量生产、并随卷门机一同配来的。如果卷帘门所配链条显小，也存在着断裂的可能。按照常规标准，百叶窗需要有断链的装置，但实际上很多门没有这方面的装置，防火百叶窗不仅不能发挥防火的功能，还存在危险。

The drive chain is produced according to the lifting weight of the door rolling machine and is matched with the door rolling machine. If the chain equipped with the rolling shutter door is small, there is also the possibility of fracture. According to conventional standards, louvers need chain breaking devices, but in fact, many doors do not have such devices. Fire shutters not only can not play the function of fire prevention, but also have risks.

八、火灾温度控制关门

8、 Fire temperature control door closing

标准规定，在2米范围内，发生火灾时，电源中断，无人现场操作，应有火势温度熔融控制关闭装置。这个功能特别对人员密集场所更显重要，但现在尚不见这类装置。

According to the national standard, in case of fire within 2m, the power supply is interrupted and no one operates on site, and there shall be a fire temperature melting control shutdown device. This function is particularly important in densely populated places, but such devices are not yet available.

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This article is provided by Jinan rolling shutter door factory. Our website is: http://www.jnhsjlm.com We will serve you wholeheartedly and welcome your visit