From the definition point of view, suspension clamp for OPGW cable is a mechanical connection device specially designed for OPGW optical cable. By cooperating with the metal fittings system on the transmission line pole tower, the optical cable is fixed at the designated location of the pole tower. At the same time, it needs to meet the various requirements of mechanical stress, environmental adaptability and communication performance of the optical cable in long-term operation. Unlike ordinary overhead cable clamps, suspension clamp for OPGW cable not only has to withstand the weight of the optical cable itself, but also needs to deal with the dynamic loads caused by extreme operating conditions such as wind vibration, icing, and temperature changes.
From the point of view of structural design and functional characteristics, high-quality suspension clamp for OPGW cable is usually composed of four parts: clamping assembly, connecting assembly, buffer assembly and protective coating. The clamping assembly adopts an arc-shaped design, and the inner wall fits the outer structure of the OPGW optical cable. Stable clamping is achieved through bolts or snap-on structures, while avoiding damage to the optical fiber units inside the optical cable due to excessive clamping force. The connecting assembly is responsible for connecting the fixture to the tower fittings. Its size and interface need to strictly match the design standards of the tower of different specifications so that there is no loose gap after installation. The buffer assembly uses elastic materials, which can effectively absorb the high-frequency vibration generated by wind vibration and reduce the fatigue damage of the optical cable due to long-term vibration. This design is very important in transmission lines in windy areas. The protective coating is selected according to the use environment, such as hot-dip galvanized, zinc-aluminum alloy coating or fluorocarbon coating.
In practical application scenarios, the selection and performance of suspension clamp for OPGW cable will directly affect the operation and maintenance cost and safety life of the transmission line. For example, a 500kV cross-border transmission project in a country in Southeast Asia. At the beginning of the project, a low-cost ordinary steel fixture was selected, and the protective coating was not optimized for the local high temperature and humidity environment. After only 3 years of operation, there were problems such as fixture corrosion and loose clamping of optical cables, which not only caused the signal attenuation of optical cables, but also required a lot of manpower to be invested in replacement and maintenance, which resulted in millions of dollars in additional operation and maintenance costs. On the other hand, looking at the smart grid upgrade project of a European power grid company, the high-performance suspension clamp for OPGW cable they selected adopts zinc-aluminum alloy coating and composite buffer structure, which can maintain stable operation within a large temperature fluctuation range, and there has been no structural failure for 10 consecutive years, which has greatly reduced operation and maintenance investment. This comparison fully shows that the high-quality suspension clamp for OPGW cable is not a simple mechanical accessory, but an important factor affecting the cost and safety performance of the entire life cycle of the transmission line.
As a professional manufacturer in the field of electric power fittings for many years, we have established a full-process quality control system from the procurement of raw materials to the delivery of finished products. Each set of fixtures will be verified by salt spray testing, mechanical load testing, vibration fatigue testing, etc., and the average trouble-free running time of the product is much higher than the industry average. We can not only provide you with standardized products that meet international standards, but also provide one-to-one technical solution design according to your project parameters, and are equipped with a professional installation guidance team, so that the fixture can be perfectly adapted to the entire transmission system. If you are looking for a cost-effective and reliable suspension clamp for OPGW cable solution for a power grid project, please contact our sales team to obtain the technical parameter manual of the product. We will use professional products and services to help your project advance efficiently.