ZH Extension Ring is a key connection fitting designed by Handan Jinmai Fastener Manufacturing Co., Ltd. for high-voltage and ultra-high-voltage transmission lines. It is mainly used to adjust the length of insulator strings or fitting strings to ensure that the line maintains the best tension and electrical clearance under various complex terrain and climatic conditions. As an important part of the power fitting system, ZH extension ring plays an indispensable role in suspension strings, tension strings and jumper strings, providing a stable, safe and flexible connection point. Its sturdy structure and excellent performance ensure the long-term stable operation of the power transmission network.
1. Excellent mechanical strength: Forged with high-quality alloy structural steel, it ensures extremely high tensile strength and fatigue strength, and can withstand extreme line tension and dynamic loads.
2. Excellent corrosion resistance: The surface is strictly hot-dip galvanized (in accordance with or exceeding relevant international standards, such as ISO 1461/ASTM A123), providing long-term anti-corrosion protection and adapting to different climate environments around the world, including coastal high salt fog areas.
3. Precision manufacturing and consistency: Advanced forging and machining processes ensure that each ZH extension ring is accurate in size and regular in geometry, ensuring smooth and reliable connection with standard hardware (such as ball head hanging ring, bowl head hanging plate, U-shaped hanging ring, etc.), and strong interchangeability.
4. Optimized design: The streamlined design effectively reduces wind resistance and reduces the potential risks caused by breeze vibration; the smooth edge treatment protects the conductors and insulators to prevent stress concentration and wear.
5. Wide applicability: The design complies with major international standards (such as IEC, ANSI) and domestic standards (such as GB/T), is compatible with mainstream insulator strings and hardware systems, and is suitable for new lines and renovation of old lines.
6. Safe and reliable: The strict quality control system ensures stable and reliable product performance, providing lasting safety protection for transmission lines.
1. Material selection: Select high-strength alloy structural steel that meets the standards as raw materials to ensure basic performance.
2. Precision forging: Die forging is performed at a precisely controlled temperature to optimize the internal grain structure of the metal and give the product excellent mechanical properties.
3. Precision machining: CNC machine tools are used for fine machining to ensure that the dimensional accuracy and surface finish of key connection parts (such as pin holes and threads) meet the design requirements.
4. Strict heat treatment: According to the characteristics of the material, heat treatment processes such as quenching and tempering are carried out to accurately control the hardness and toughness and eliminate internal stress.
5. High-quality galvanizing: After thorough pre-treatment (pickling, plating assistance), the workpiece is hot-dip galvanized at high temperature. Strictly control the galvanizing temperature, time and post-treatment (such as centrifugal zinc throwing) to ensure uniform coating thickness, strong adhesion and smooth appearance.
Material: High-quality high-strength alloy structural steel (such as 35CrMo, 40Cr, 42CrMo, etc., in accordance with specific standard requirements).
Surface treatment: Hot-dip galvanizing, the minimum average thickness of the galvanized layer is usually not less than 85 microns (specific values are based on applicable standards such as ISO 1461, ASTM A123 or GB/T 13912).
Rated Breaking Load (RBL): A variety of strength levels are available (for example: 160kN, 210kN, 250kN, 300kN, 400kN, etc.), specifically designed according to customer needs or standard series.
Connection method: The standard design has a ball and socket connection (Socket & Ball) or eye connection (Eye & Eye) of the same specification at both ends to ensure flexible matching with the corresponding hardware. The connection dimensions (such as ball head diameter, pin hole diameter) comply with relevant IEC, ANSI or GB standards.
ZH Extension Ring is an indispensable high-quality hardware for building safe, efficient and reliable high-voltage transmission lines. With its profound industry experience, advanced production technology and strict quality management system, Handan Jinmai Fastener Manufacturing Co., Ltd. is committed to providing customers with ZH extension ring products with excellent performance, reliable quality and durability. We are well aware of the key role of hardware in power infrastructure, and each product embodies our pursuit of excellence and adherence to our commitment to customers.
Official website: https://www.jinmaipowerline.com/
Email: [email protected]
Contact: WhatsApp/wechat: +86 13831001495
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