01

　　01

　　电缆桥架结构类型选择

　　Selection of cable tray structure types

　　在工程设计文件中通常笼统地将电缆桥架称呼为“桥架”，并未指出具体的结构特征，不同类型、不同制作材料的电缆桥架相差较大，且结构类型的混乱会带来工作现场散热、机械防护方面的问题。

　　In engineering design documents, cable trays are generally referred to as "trays" without specifying their specific structural characteristics. The prices of cable trays of different types and materials vary greatly, and the confusion of structural types can lead to problems in heat dissipation and mechanical protection at the work site.

　　02

　　02

　　电缆桥架材质选择

　　Material selection for cable tray

　　电缆桥架的材质是电缆桥架工程设计常见的另外一个问题。按照材料划分，电缆桥架主要有钢制、玻璃钢和铝合金几种。

　　The material of cable tray is another common issue in cable tray engineering design. According to material classification, cable trays are mainly made of steel, fiberglass, and aluminum alloy.

　　03

　　03

　　电缆桥架表面防腐层类别选择

　　Category selection of anti-corrosion coating on cable tray surface

　　工程设计中常见的第三个问题是电缆桥架型号没有标注防腐层的类别，也没有统一的文字说明。此问题在现实中有教训，如我国承担总承包的印尼某工程，钢制电缆桥架的表面防腐处理没有进行盐雾试验，完工不久桥架就锈蚀得相当严重，不得不更换。电缆桥架的表面防腐层类别主要有热浸锌、镀锌镍、冷镀锌、粉末静电喷涂等方式。

　　The third common problem in engineering design is that the cable tray model does not indicate the category of anti-corrosion coating, nor does it have a unified textual explanation. There are lessons to be learned from this issue in reality. For example, in a project undertaken by China as the general contractor in Indonesia, the surface anti-corrosion treatment of the steel cable tray was not subjected to salt spray testing. Shortly after completion, the tray corroded severely and had to be replaced. The surface anti-corrosion coating of cable trays mainly includes hot-dip galvanizing, galvanized nickel, cold galvanizing, powder electrostatic spraying, and other methods.

　　04

　　04

　　电缆桥架防火等级选择

　　Selection of fire protection level for cable tray

　　电缆桥架在有防火要求的区段内，可在电缆梯架、托盘内添加具有耐火或难燃性能的板、网等材料构成封闭或半封闭式结构，并采取在桥架及其支吊架表面涂刷防火涂层等措施，其整体耐火性能应满足有关规范或标准的要求。在工程防火要求较高的场所，不宜采用铝合金电缆桥架。

　　In sections with fire protection requirements, cable trays can be constructed with enclosed or semi enclosed structures by adding fire-resistant or flame-retardant materials such as plates and nets to cable ladders and trays. Measures such as applying fire-resistant coatings to the surfaces of cable trays and their supports and hangers should be taken, and their overall fire resistance performance should meet the requirements of relevant national regulations or standards. Aluminum alloy cable trays should not be used in places with high fire prevention requirements.

　　05

　　05

　　电缆桥架填充率的选择

　　Selection of cable tray filling rate

　　电缆梯架、托盘宽度和高度的选择应符合填充率的要求，电缆的梯架和托盘内的填充率在一般情况下，电力电缆可取40%～50%，控制电缆可取50%～70%，且宜预留10%～25%工程发展余量。

　　The selection of cable ladder and tray width and height should meet the requirements of filling rate. In general, the filling rate inside the cable ladder and tray can be 40% to 50% for power cables and 50% to 70% for control cables, with a 10% to 25% engineering development margin reserved.

　　06

　　06

　　电缆桥架载荷等级的选择

　　Selection of Load Levels for Cable Trays

　　在选择电缆桥架的荷载等级时，电缆桥架的工作均布荷载不应大于所选电缆桥架荷载等级的额定均布荷载，如果电缆桥架的支吊架的实际跨距不等于2m时，则工作均布荷载应满足要求。各种组件及支吊架在满足相应荷载的条件下，其规格尺寸应与托盘、梯架的直线段、弯通系列相匹配。

　　When selecting the load level of the cable tray, the working uniform load of the cable tray should not exceed the rated uniform load of the selected cable tray load level. If the actual span of the support and hanger of the cable tray is not equal to 2m, the working uniform load should meet the requirements. The specifications and dimensions of various components and supports and hangers should match the straight sections and bending series of pallets and ladders under the corresponding load conditions.

　　07

　　07

　　电缆桥架的规格尺寸选择

　　Selection of specifications and dimensions for cable trays

　　工程实际中，在电缆桥架的规格尺寸选择方面的问题是要么偏大，要么偏紧张。

　　In practical engineering, the problem with selecting the specifications and dimensions of cable trays is either too large or too tight.

　　08

　　08

　　根据电缆弯曲半径选择电缆桥架

　　Select cable tray based on cable bending radius

　　在选择电缆桥架的弯通或引上、引下装置时，不应小于电缆桥架内电缆小允许弯曲半径。

　　When selecting the bending or leading devices for cable trays, they should not be less than the minimum allowable bending radius of the cables inside the cable tray.

　　09

　　09

　　材料统计方面的问题

　　Issues related to material statistics

　　设计图纸在材料统计方面存在的主要问题：

　　The main issues with material statistics in design drawings are:

　　1）漏项。

　　1) Missing item.

　　2）错项。

　　2) Wrong item.

　　3）统计量偏差大，通常是数量偏少。

　　3) The statistical deviation is large, usually due to a small quantity.

　　10

　　ten

　　电缆桥架的选型设计

　　Selection and design of cable tray

　　1、确定环境条件环境条件一般有三种：腐蚀环境、正常环境、特殊环境。

　　1. There are generally three types of environmental conditions for determining environmental conditions: corrosive environment, normal environment, and special environment.

　　2、根据多数电缆走向，在室内可沿着、柱、梁、楼板走，在室外尽可能沿工艺管道走。

　　2. According to the majority of cable routes, indoor cables can be routed along columns, beams, and floors, while outdoor cables should be routed along process pipelines as much as possible.

　　3、计算荷重计算在电缆桥架走向断面上的单位长度电缆的重量q及总荷载G

　　3. Calculate the weight q and total load G of a unit length cable on the cross-section of the cable tray for load calculation

　　G总=n1q1+n2q2……nnqn 式中：q1·q2·q3……qn为每根电缆单位重量(kg/m)

　　G total=n1q1+n2q2... nnqn, where q1 · q2 · q3... qn is the unit weight of each cable (kg/m)

　　n1·n2·n3……nn为相同电缆根数

　　N1 · n2 · n3... nn is the same number of cables

　　G总<G允（电缆侨架的允许荷载参照荷载曲线图表）

　　G total<G allowance (the allowable load of cable trays refers to the load curve chart)

　　4、选择桥架根据电缆荷载及桥架安装处的环境，以桥架的载荷曲线为依据，来确定桥架的类型和规格及立柱的间距、托臂的长度、桥架的层次，立柱的长度等。

　　4. The selection of cable trays is based on the cable load and the environment where the tray is installed, using the load curve of the tray as the basis to determine the type and specifications of the tray, as well as the spacing between columns, the length of the support arm, the level of the tray, and the length of the columns.

　　5、根据电缆走向及安装的环境确定桥架的固定方式；悬挂式、直立式，(这两种形式均可采用单侧固定或双侧固定)、壁侧式等。

　　5. Determine the fixing method of the cable tray based on the cable routing and installation environment; Hanging type, upright type (both of which can be fixed on one side or both sides), wall side type, etc.

　　6、各种电缆在电缆桥架上的层次安排与层间距离。

　　6. The hierarchical arrangement and interlayer distance of various cables on cable trays.

　　电缆桥架层次的排列是：弱电控制电缆在上层，接着一般控制电缆、低压动力电缆、高压动力电缆依次在下排列。

　　The arrangement of cable trays is as follows: weak current control cables are arranged on the top layer, followed by general control cables, low-voltage power cables, and high-voltage power cables arranged in sequence below.

　　本文由  济南电缆桥架 友情奉献.更多有关的知识请点击   http://www.sdhangfeng.com  真诚的态度.为您提供为的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

　　This article is a friendly contribution from Jinan Cable Tray. For more related knowledge, please click http://www.sdhangfeng.com Sincere attitude. We provide you with comprehensive services. We will gradually contribute more relevant knowledge to everyone. Please stay tuned