Safety is always an important consideration in cable engineering construction, and cable bridge plays the role of protecting cables and supporting load-bearing components in cabling engineering, so the importance of safety construction of cable engineering is obvious. However, after all, the application of cable bridge in our country is only about 10 years, and a few quality problems are inevitable. At this time, we need to have a certain understanding of the detection knowledge of cable bridge.

一、当电缆桥架本身产生质量原因时，如有些电缆桥架产出现品质差、加工粗糙、焊点不牢、防腐层附着量不均匀和附着力不够、防火或耐火性能差等原因时，无论是供货商还是采购商都需要对电缆桥架进行检测。

1. When the cable bridge itself produces quality reasons, such as poor quality, rough processing, weak solder joints, uneven adhesion and insufficient adhesion of anticorrosive coatings, poor fire resistance or fire resistance, both suppliers and purchasers need to test the cable bridge.

二、当电缆桥架在组装交付后发生垮塌，或者短短几年就出现严重腐蚀，当然 也可能存在工程选型不当造成重大变形、弯曲等缺陷的情况，这时，也需要我们对电缆桥架进行检测。

2. When the cable bridge collapses after assembly and delivery, or serious corrosion occurs in a few years, of course, there may also be serious deformation, bending and other defects caused by improper engineering selection. At this time, we also need to test the cable bridge.

防腐电缆桥架检测项目主要有桥架机械性能及承载能力试验、盐雾试验、紫外线冷凝试验、耐酸碱性试验、防腐层厚度试验、防腐层附着力试验、抗冲击试验、温度适应性试验、桥架组装后连接螺栓孔处的密封性试验、阻燃试验、桥架电气连续性试验、耐火试验、电磁屏蔽试验、抗静电等项目

Testing items of anticorrosive cable bridge frame mainly include mechanical performance and bearing capacity test, salt spray test, ultraviolet condensation test, acid and alkali resistance test, thickness test of anticorrosive layer, adhesion test of anticorrosive layer, impact resistance test, temperature adaptability test, sealing test at bolt hole after bridge assembly, flame retardant test. Test, Bridge Electrical Continuity Test, Fire Resistance Test, Electromagnetic Shielding Test, Antistatic and other items

耐腐蚀钢制电缆桥架检测项目主要有桥架载荷试验、桥架率试验、桥架节材率测定、盐雾试验、桥架电气连续性试验、冲击试验、耐酸性试验、防腐蚀层厚度测量、防腐层附着力测量、防腐层为金属无机涂层的测定、防腐蚀层为有机涂层的测定、外观及制造京都测量等项目。

Corrosion-resistant steel cable bridge detection projects mainly include bridge load test, energy-saving rate test, material-saving rate test, salt spray test, bridge electrical continuity test, impact test, acid resistance test, thickness measurement of anticorrosive layer, adhesion measurement of anticorrosive layer, determination of metal inorganic coating, anticorrosive layer. Corrosion layer is the determination of organic coating, appearance and manufacture of Kyoto measurement and other items.

塑料电缆桥架检测项目主要有工作载荷试验、抗撞击试验、低温落锤冲击试验、紧固件的机械强度试验、金属嵌件轴向负荷的耐受能力试验、绝缘强度试验、电气非传导性试验、紫外线耐老化试验、耐水性能试验、耐腐蚀性能试验、耐候性试验、拉伸性能试验、阻燃性试验、烟密度试验、耐火性试验、屏蔽效能试验等项目。

The main testing items of plastic cable bridge are safety working load test, impact test, low temperature drop hammer impact test, mechanical strength test of fasteners, endurance test of metal inserts under axial load, insulation strength test, electrical non-conductivity test, ultraviolet aging test, water resistance test and corrosion resistance. Performance test, weatherability test, tensile test, flame retardant test, smoke density test, fire resistance test, shielding effectiveness test and other items.

建筑用网格式金属电缆桥架检测项目主要有外观、制造精度、焊接质量、防腐性能、电气连续性、工作载荷性能等项目。

The inspection items of grid metal cable bridge frame for construction mainly include appearance, manufacturing accuracy, welding quality, anti-corrosion performance, electrical continuity, safety working load performance and so on.

公路用聚氨酯复合电缆桥架检测项目主要有外观、尺寸、纵向拉伸强度、纵向弯曲强度、冲击强度、密度、巴柯尔硬度、负荷变形硬度、整体负载、氧指数、耐水性能、耐汽油性能、耐酸性能、耐碱性能、耐湿热性能、耐低温冲击性能、耐人工加速老化性能等等项目。

Highway polyurethane composite cable tray inspection items mainly include appearance, size, longitudinal tensile strength, longitudinal bending strength, impact strength, density, Baker hardness, load deformation hardness, overall load, oxygen index, water resistance, gasoline resistance, acid resistance, alkali resistance, moisture and heat resistance, low temperature resistance. Impact performance, anti-accelerated aging performance and so on.

由此我们可以看出，不同用途的电缆桥架检测项目还是有区别的。一款高质量的电缆桥架应该适应其布线工程所需要的各种荷载和档距条件，满足其力学性能要求，同时具备结构合理，对电缆起到有效的防腐、防火、耐火的保护。当然，这些都需要我们严格按照检测标准里规定的技术指标来指导生产和施工，只有这样才能真正保证电缆工程建设的性。

From this we can see that there are still differences in the detection items of cable bridge frames for different purposes. A high-quality cable bridge should meet all kinds of loads and spacing conditions required by its wiring project, meet its mechanical properties, and have reasonable structure, which can effectively protect the cable from corrosion, fire and fire. Of course, all of these require us to strictly follow the technical indicators specified in the test standards to guide production and construction, only in this way can we truly ensure the safety of cable engineering construction.

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