我们都知道“桥架”即是电缆桥架。分为槽式电缆桥架、托盘式电缆桥架和梯级式电缆桥架、网格桥架等结构，由支架、托臂和安装附件等组成。 山东桥架厂家认为如果说到防火桥架的防火性能和作用，以及与普通桥架的区别，可能不少人员都是只知其一就不知其二，甚至还有一些人员是一问三不知的。

We all know that "bridge" is cable tray. It is divided into trough type cable tray, tray type cable tray, ladder type cable tray, grid bridge and other structures, and consists of support, corbel and installation accessories. Shandong cable tray manufacturers believe that when it comes to the fire performance and function of fireproof cable trays, as well as the differences from ordinary cable trays, many personnel may only know one thing and not know the other, and even some personnel may not know the other.

1、防火桥架的特点和作用

1. The characteristics and functions of fire resistant cable trays

防火桥架是电缆桥架的一种型号，标准名应该叫耐火桥架，就是在一定温度下桥架内的电缆能维持一定时间运行。在普通架的表面涂装防火涂料，以发挥防火阻燃的效果。其实桥架本身不会着火。起火的只有电缆。

Fire resistant cable tray is a type of cable tray, and its standard name should be fire resistant cable tray, which means that the cable inside the cable tray can operate for a certain time under a certain temperature. Apply fire retardant coating on the surface of ordinary frames to achieve the effect of fire resistance and flame retardancy. In fact, the bridge itself will not catch fire. The only thing that caught fire was the cables.

整体安装方便、结构合理、寿命长、美观，电缆安装在电缆桥架上。主要是为了发生火灾事故时能维持电力供应减少伤亡。

The overall installation is convenient, the structure is reasonable, the service life is long, and the appearance is beautiful. The cable is installed on the cable tray. Mainly to maintain power supply and reduce casualties in case of fire accidents.

2、防火桥架标准及常用规格：

2. Standard and common specifications for fire resistant cable trays:

防火电缆桥架的标准长度按照规范可以分为2m、3m、4m和6m。托盘结构防火电缆桥架的标准长度一般为2m一节。网格结构防火电缆桥架的标准长度一般为3m一节。防火电缆桥架直线段的标准长度一般有2m、3m、4m、6m几种。防火电缆桥架弯通的内侧弯曲半径有50mm、100mm、150mm、200mm、300mm、400mm、600mm等。

The standard length of fireproof cable tray can be divided into 2m, 3m, 4m and 6m according to the specification. The standard length of tray structure fireproof cable tray is generally 2m. The standard length of grid structure fireproof cable tray is generally 3m. The standard length of straight section of fireproof cable tray is generally 2m, 3m, 4m and 6m. The inner bending radius of the fireproof cable tray is 50mm, 100mm, 150mm, 200mm, 300mm, 400mm, 600mm, etc.

防火电缆桥架的常用宽度有50mm、100mm、150mm、200mm、300mm、400mm、500mm、600mm、800mm、1000mm等。其中200mm、300mm、400mm宽度为常见。防火电缆桥架的重量决定因素包括桥架的宽度、高度、厚度和密度，宽度越宽重量越大，例如200*50mm比100*50的桥架要重，高度越高重量越沉，例如100*100mm比100*50mm的桥架要沉，厚度越厚重量越大，例如200*100*1.2mm比200*100*1.0mm的桥架重量大，钢制桥架比铝合金桥架就重。

Common widths of fireproof cable tray are 50mm, 100mm, 150mm, 200mm, 300mm, 400mm, 500mm, 600mm, 800mm, 1000mm, etc. Among them, 200mm, 300mm, and 400mm widths are common. The weight determinants of fireproof cable tray include the width, height, thickness and density of the tray. The wider the width, the greater the weight. For example, 200 * 50mm is heavier than 100 * 50 tray, and the higher the height, the heavier the weight. For example, 100 * 100mm is heavier than 100 * 50mm tray, and the thicker the thickness, the heavier the weight. For example, 200 * 100 * 1.2mm is heavier than 200 * 100 * 1.0mm tray, and steel tray is heavier than aluminum alloy tray.

防火电缆桥架的常用高度有50mm、100mm、150mm、200mm，电缆数量比较少的话一般使用50mm，100mm是使用多的高度之一。防火电缆桥架宽度和高度的尺寸偏差应该在GB/T1804-2000中V级的规定范围内，其中要注意的是，防火电缆桥架盖板的宽度要取正偏差，槽体或梯架的宽度要去负偏差。

The common heights of fireproof cable tray are 50mm, 100mm, 150mm and 200mm. If the number of cables is relatively small, 50mm is generally used. 100mm is one of the heights used more. The size deviation of the width and height of the fireproof cable tray shall be within the range of Grade V in GB/T1804-2000. It should be noted that the width of the fireproof cable tray cover plate should be positive deviation, and the width of the tray or ladder should be negative deviation.

对于槽式防火电缆桥架来说，连接片的高度取决于桥架的高度，连接片的宽度取决于桥架的宽度。连接片的厚度要与桥架托盘的厚度保持一致，或者厚一个等级。防火电缆桥架的常用厚度有1.0mm、1.2mm、1.5mm、2.0mm、2.2mm、2.5mm等。1.0mm厚度一般适用于宽度<=100mm的防火电缆桥架。

For trough type fireproof cable tray, the height of the connector depends on the height of the tray, and the width of the connector depends on the width of the tray. The thickness of the connecting piece should be consistent with the thickness of the bridge tray, or one level of thickness. The common thickness of fireproof cable tray is 1.0mm, 1.2mm, 1.5mm, 2.0mm, 2.2mm, 2.5mm, etc. 1.0mm thickness is generally applicable to fireproof cable tray with width<=100mm.

防火电缆桥架在安全工作载荷的情况下，其挠度值与其支吊架的跨距相比，该比例不应该大于1/200，否则会导致防火电缆桥架发生弯曲变形或破裂，出现安全事故。防火电缆桥架水平安装时，应该按照载荷规范选择支、吊架间距，距离不应该大于2米。防火电缆桥架支、吊架的间距也要参考其产品性能参数说明来设置。更多相关内容就来我们网站 //www.comprepyme.com咨询吧！

Under the condition of safe working load, the deflection value of fireproof cable tray should not be greater than 1/200 compared with the span of its supports and hangers, otherwise, the fireproof cable tray will be bent, deformed or broken, resulting in safety accidents. When the fireproof cable tray is installed horizontally, the spacing between supports and hangers should be selected according to the load specification, and the distance should not be more than 2m. The spacing between supports and hangers of fireproof cable tray shall also be set according to the product performance parameter description. For more related content, come to our website //www.comprepyme.com Consult!