Strain Yoke Plates are commonly used hardware in power lines, and their quality is crucial to the safe and stable operation of transmission lines. Therefore, when purchasing them, we should first understand the product and choose one that suits our working conditions to achieve better results.
| parameter | content |
| Function | Connecting components such as insulator strings, conductor clamps, and tower crossarms in transmission lines, it also helps to distribute and balance conductor tension, preventing excessive localized stress from damaging components. |
| Materials and Craftsmanship | The mainstream material is hot-dip galvanized steel, while aluminum alloy or forged steel may be used in some applications. The hot-dip galvanizing process significantly improves its corrosion resistance, making it suitable for harsh outdoor environments such as wind, rain, and sun exposure, thus extending its service life in power transmission lines. |
| Common types | Different types of tension connecting plates are suitable for different scenarios, and their structures vary. The LF type is rectangular with an elliptical hole in the middle, suitable for connecting double-split conductors to insulator strings; the triangular connecting plate can be used for suspension or tension scenarios with double conductors, and its ultimate strength can reach 60,000 pounds, which can meet the strength requirements of high-voltage lines. |
| Performance parameters | Precise dimensional parameters, such as hole spacing and plate thickness, ensure compatibility and connection stability with other hardware. |
Mechanical performance testing of Strain Yoke Plates is crucial, as passing mechanical performance tests is key to ensuring their ability to withstand transmission line tensions and resist extreme loads. Based on global standards, we test them for tensile strength, breaking load, yield strength, and fracture characteristics, primarily including the following:
Rated breaking load: The load-bearing capacity of Strain Yoke Plates under ultimate tension can be ensured to be no less than the design rating, which can prevent breakage during operation. Internationally, the measured breaking load value is ≥ 90% of the rated value, but the breakage location must not be in critical stress parts such as connection holes and welds. Assemble according to the actual stress to avoid additional bending moment. Use a tensile testing machine to apply uniform load and continue loading until the product breaks. Record the maximum load value to determine whether it meets the standard;
Tensile strength: The strength of the material itself is very important. If the material strength is insufficient, it may lead to deformation or failure under long-term stress. The yield strength of hot-dip galvanized steel is ≥235MPa and the tensile strength is ≥370MPa. Standard tensile specimens are cut from the yoke plate, and the tensile tester is loaded until the specimen yields and breaks. The yield load and the maximum tensile load are recorded, and the corresponding strength is calculated;
Elongation at break: This test measures the plasticity of the product to prevent brittle fracture. For steel yokes, the elongation at break δ5 should be ≥15%. The elongation is calculated by comparing the original length of the gauge length of the specimen with the length after fracture.
Strain Yoke Plates are a type of customizable product. Customization services cover product design, manufacturing, and also include supporting technical and after-sales support. This allows the yoke plates to be used in different power transmission projects, meeting the personalized needs of different working conditions. The main customization options are as follows:
Customized structure
Common yoke plates include rectangular and triangular shapes. The shape can be adjusted according to the insulator string model, conductor split number, and tower crossarm interface in the project. The plate thickness, hole diameter, hole spacing and other dimensions can be precisely adjusted. The number and position of holes can also be increased or decreased according to the installation space.
Surface treatment
For ordinary scenarios, we usually use hot-dip galvanizing to meet basic corrosion resistance. If the working conditions are harsh, we can perform reinforcement treatments such as anodizing and powder coating. When going overseas, we can also customize the surface treatment process according to different markets to ensure compliance with local standards.
Customized solutions for different scenarios
For scenarios such as high mountains, coastal areas, and high altitudes, users often choose customized solutions when purchasing yokes. These customized solutions feature wind-resistant and earthquake-resistant yokes, and include salt spray-proof sealed structures for offshore wind power transmission lines to reduce the erosion of the product by sea winds. If you also need customization, please feel free to contact us.
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