一、电缆桥架的核心知识

1、 Core knowledge of cable tray

类型与结构

Type and Structure

梯级式桥架：通风散热好，适用于大直径电缆或高负载场景（如电力系统）。

Cascade bridge: with good ventilation and heat dissipation, suitable for large-diameter cables or high load scenarios (such as power systems).

托盘式桥架：底部为平板结构，适合通信电缆、弱电系统或轻型布线。

Tray type cable tray: The bottom is a flat structure, suitable for communication cables, weak current systems, or lightweight wiring.

槽式桥架：全封闭设计，防尘、防干扰，常见于数据中心或精密设备环境。

Slot type bridge: fully enclosed design, dustproof and anti-interference, commonly used in data centers or precision equipment environments.

组合式桥架：模块化设计，灵活适应复杂布线需求。

Modular cable tray: modular design, flexible to adapt to complex wiring requirements.

材质选择

Material selection

镀锌钢：经济实用，需注意潮湿环境下的防腐处理。

Galvanized steel: economical and practical, but attention should be paid to anti-corrosion treatment in humid environments.

铝合金：轻便耐腐蚀，适合化工、海洋等腐蚀性环境。

Aluminum alloy: lightweight and corrosion-resistant, suitable for corrosive environments such as chemical and marine industries.

不锈钢：高强度、耐高温，成本较高，用于特殊工业场景。

Stainless steel: high strength, high temperature resistance, high cost, used in special industrial scenarios.

玻璃钢：绝缘性好，抗酸碱，适用于户外或强电磁干扰区域。

Fiberglass: Good insulation, acid and alkali resistance, suitable for outdoor or strong electromagnetic interference areas.

载荷等级

Load level

根据电缆重量和数量选择桥架载荷（轻型、中型、重型），需预留20%余量。

Select bridge load (light, medium, heavy) based on cable weight and quantity, with a 20% margin reserved.

二、设计规范与标准

2、 Design specifications and standards

标准

Chinese standards

《CECS 31:2017 钢制电缆桥架工程设计规范》

CECS 31:2017 Design Specification for Steel Cable Tray Engineering

《/T 10216-2013 电控配电用电缆桥架》

/T 10216-2013 Cable trays for electrical control and distribution

国际参考

International reference

IEC 61537: 国际电缆桥架安装标准

IEC 61537:  International Cable Tray Installation Standard

NEMA VE1: 北美桥架设计规范

NEMA VE1:  North American Bridge Design Specification

三、安装要点

3、 Installation points

路径规划

Path planning

避开热源、振动源，与管道保持距离（如与燃气管平行≥0.3m，交叉≥0.5m）。

Avoid heat and vibration sources, and maintain a safe distance from the pipeline (such as parallel to the gas pipe ≥ 0.3m, crossing ≥ 0.5m).

支撑间距

Support spacing

水平安装：1.5-3m（根据载荷调整）；垂直安装：≤2m。

Horizontal installation: 1.5-3m (adjusted according to load); Vertical installation: ≤ 2m.

接地要求

Grounding requirements

全长少2处与接地干线连接，镀锌桥架可利用本体作为接地线（需确保跨接点导电性）。

At least 2 points along the entire length should be connected to the grounding main line, and the galvanized bridge can be used as a grounding wire (ensuring the conductivity of the crossing point).

四、常见问题与解决方案

4、 Common Problems and Solutions

腐蚀问题

Corrosion issue

潮湿环境选铝合金或热浸镀锌桥架，定期涂防腐涂料。

Choose aluminum alloy or hot-dip galvanized cable trays in humid environments, and regularly apply anti-corrosion coatings.

电缆过热

Cable overheating

增加桥架通风孔或改用梯级式设计，避免多层电缆紧密堆积。

Add ventilation holes to the cable tray or adopt a stepped design to avoid the tight stacking of multiple layers of cables.

振动导致松动

Vibration causes looseness

在设备附近使用减震支架，螺栓连接处加装弹簧垫圈。

Use shock-absorbing brackets near the equipment and install spring washers at the bolted connections.

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