1、电缆桥架

1. Cable tray

电缆桥架弯通主要分为三种类型：水平弯通、垂直弯通、改向弯通。水平弯通包括：水平90度弯通、水平135度弯通、水平三通、水平四通、水平等差弯、变径接头、喇叭口等。电缆桥架的标准长度按照规范可以分为2m、3m、4m和6m。托盘结构电缆桥架的标准长度一般为2m一节。网格结构电缆桥架的标准长度一般为3m一节。

Cable tray bends are mainly divided into three types: horizontal bends, vertical bends, and directional bends. Horizontal bends include: horizontal 90 degree bend, horizontal 135 degree bend, horizontal tee, horizontal four-way, horizontal equal difference bend, variable diameter joint, horn mouth, etc. The standard length of cable trays can be divided into 2m, 3m, 4m, and 6m according to specifications. The standard length of tray structure cable trays is generally 2m per section. The standard length of grid structured cable trays is generally 3m per section.

电缆桥架

Cable tray

2、铝合金桥架

2. Aluminum alloy bridge frame

铝合金电缆桥架的表面阳极氧化处理，小平均膜厚应该为10um，小局部膜厚应该为8um。铝合金电缆桥架表面喷涂化工防腐粉末的厚度应该大于等于80um。铝合金电缆桥架柔韧性参照《漆膜柔韧性测定法》GB/T1731标准，铝合金电缆桥架冲击强度按照《漆膜耐冲击测定法》GB/T1732标准。

The surface anodizing treatment of aluminum alloy cable trays should have a minimum average film thickness of 10um and a minimum local film thickness of 8um. The thickness of chemical anti-corrosion powder sprayed on the surface of aluminum alloy cable trays should be greater than or equal to 80um. The flexibility of aluminum alloy cable trays should refer to the GB/T1731 standard for the determination of paint film flexibility, and the impact strength of aluminum alloy cable trays should follow the GB/T1732 standard for the determination of paint film impact resistance.

铝合金桥架

Aluminum alloy bridge frame

3、桥架标准

3. Bridge standard

2017标准中，电缆桥架宽度为300mm、350mm、400mm、450mm时，桥架的弯曲半径应该为150mm。2000标准中托盘式桥架结构特征的名称为有孔托盘，代号为P。2000桥架标准中梯式桥架结构特征的名称为梯架，代号为T。

In the 2017 national standard, when the width of the cable tray is 300mm, 350mm, 400mm, and 450mm, the bending radius of the tray should be 150mm. The structural feature of the tray type tray in the 2000 national standard is called perforated tray, with the code P. The structural feature of the ladder type tray in the 2000 national tray standard is called ladder frame, with the code T.

桥架标准

Bridge standard

4、桥架规格

4. Bridge specifications

电缆桥架提料名称规则通常是：材质+型式+规格，如：防火槽式水平弯通200*100、喷塑槽式水平三通100*50、不锈钢梯式水平四通300*100等。电缆桥架编写立柱提料清单时应填写：名称+型号+立柱长度+分类。如“热浸锌槽钢立柱，规格JY-H103-1000 (I型）”，“热浸锌角钢立柱，规格JY-H104-800 (II型）”。

The naming rules for cable trays are usually: material+type+specification, such as: fireproof groove horizontal bend 200 * 100, spray painted groove horizontal tee 100 * 50, stainless steel ladder horizontal tee 300 * 100, etc. When writing the column material list for cable trays, the following information should be filled in: name+model+column length+classification. Such as "Hot dip galvanized channel steel column, specification JY-H103-1000 (Type I)" and "Hot dip galvanized angle steel column, specification JY-H104-800 (Type II)".

5、桥架高度

5. Bridge height

地面2.2m以上高度才适合敷设电缆桥架，0.3m是桥架顶部距顶棚或其它障碍物的小距离。50%是桥架内电缆横截面积与桥架横截面积的小比例。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。

A height of at least 2.2m above the ground is suitable for laying cable trays, and 0.3m is the minimum distance from the top of the tray to the ceiling or other obstacles. 50% is the minimum ratio of the cross-sectional area of the cable inside the cable tray to the cross-sectional area of the cable tray. The determining factors for the weight of cable trays include the width, height, thickness, and density of the tray. The wider the width, the heavier the weight. For example, 200 * 50mm trays are heavier than 100 * 50 trays, and the higher the height, the heavier the weight. For example, 100 * 100mm trays are heavier than 100 * 50mm trays, and the thicker the thickness, the heavier the weight. For example, 200 * 100 * 1.2mm trays are heavier than 200 * 100 * 1.0mm trays, and steel trays are heavier than aluminum alloy trays.

6、桥架载荷

6. Bridge load

电缆桥架水平安装时要注意避让周围的建筑物，要避免受到周围气体液体腐蚀以及固体的物理伤害，也要保证载荷足够避免出现相关事故，在桥架标准中也有这方面的要求和规范。对于跨距大于标准长度或考虑户外风雪作用的高负载的电缆桥架，需要采用增强型侧板或者增强桥架的高度，或者采用瓦楞型电缆桥架，来保证其载荷。

When installing cable trays horizontally, attention should be paid to avoiding surrounding buildings, avoiding corrosion from surrounding gases and liquids, as well as physical damage from solids. It is also necessary to ensure that the safe load is sufficient to avoid related accidents. This is also required and regulated in the tray standards. For cable trays with spans greater than the standard length or high loads considering outdoor wind and snow effects, reinforced side panels or the height of reinforced trays, or corrugated cable trays, need to be used to ensure their safe load capacity.

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The above exciting content comes from: Jinan Cable Tray. For more exciting content, please click on our website to view more: http://www.sdhangfeng.com