桥架是一个支撑和放电缆的支架。桥架在工程上用的很普遍,只要铺设电缆就要用桥架。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。电缆桥架的组成结构应满足什么要求?
山东电缆桥架厂家为您讲解:
The bridge is a support for supporting and placing cables. The bridge is widely used in the project. As long as the cable is laid, the bridge must be used. The cable bridge is divided into trough type cable bridge, tray type cable bridge, ladder type cable bridge, grid bridge and other structures; It is composed of bracket, bracket and installation accessories. What requirements should the composition of cable tray meet? Shandong cable bridge manufacturer explains to you:
电缆桥架的组成结构应满足强度、刚度及稳定性要求,且应符合下列规定:
The composition of cable tray shall meet the requirements of strength, rigidity and stability, and shall meet the following requirements:
①桥架的承载能力不得超过使桥架初产生永久变形时的大荷载除以安全系数为1.5的数值;
① The bearing capacity of the bridge shall not exceed the value of dividing the large load when the bridge initially produces permanent deformation by the safety factor of 1.5;
②梯架、托盘在允许安全工作载荷作用下的相对挠度值,钢制不宜大于1/200;铝合金制不宜大于1/300;
② The relative deflection of ladder and tray under the allowable safe working load should not be greater than 1/200 for steel; Aluminum alloy shall not be greater than 1/300;
③钢制托臂在允许承载下的偏斜与臂长比值不宜大于1/100;
③ The ratio of deflection to arm length of steel joist under allowable load should not be greater than 1/100;
④核电厂安全级电路电缆桥架应满足抗震Ⅰ类物项设计要求,应同时采用运行安全地震震动和极限安全地震震动进行抗震设计。
④ The cable bridge of the safety-level circuit of the nuclear power plant shall meet the design requirements of seismic Category I items, and the seismic design shall be carried out using both the operational safety seismic vibration and the ultimate safety seismic vibration.
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