High Speed Turning Block For OHTL Power Transmission Distribution Line Stringing
A High Speed Turning Block is a specialized pulley block designed for overhead power transmission line stringing operations where rapid hauling of wire ropes or conductors is required. It allows the wire rope to pass through connectors smoothly at high speeds, typically up to 80 meters per minute, minimizing rope wear and ensuring efficient stringing.
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A High Speed Turning Block is a specialized pulley block designed for overhead power transmission line stringing operations where rapid hauling of wire ropes or conductors is required. It allows the wire rope to pass through connectors smoothly at high speeds, typically up to 80 meters per minute, minimizing rope wear and ensuring efficient stringing.
Key Features:
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Maximum Hauling Speed: Up to 80 m/min, suitable for fast conductor or pilot rope stringing.
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Load Capacity: Available in various rated loads, commonly from 50 kN to 300 kN or more.
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Sheave Diameter: Typically ranges from about 308 mm to 916 mm, depending on the model and load capacity.
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Sheave Width: Varies between 75 mm and 110 mm or more, designed to accommodate different rope sizes.
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Material: Steel sheaves with hot-rolled or quenched grooves for durability and reduced rope wear.
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Bearings: Equipped with roller or ball bearings for smooth rotation at high speeds.
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Design: Includes guard plates and balancing weights to stabilize the block and reduce vibration during operation.
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Capability: Can pass through steel wire rope connectors without snagging, facilitating continuous pulling.
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Typical Models and Specifications:
| Model | Rated Load (kN) | Sheave Diameter (mm) | Sheave Width (mm) | Weight (kg) | Remarks |
|---|---|---|---|---|---|
| THZ1-5 | 50 | 308 | 75 | 22 | Steel sheave |
| THZ1-16 | 160 | 600 | 92-110 | 115 | Steel sheave |
| THZ1-30 | 300 | 916 | 110 | 200 | Steel sheave |
| THZ2-16 | 160 | 660 | 110 | 68 | Steel sheave |
Applications:
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Used extensively in overhead transmission line stringing to guide and turn wire ropes and conductors at high speeds.
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Suitable for tensioning and erecting wires where rapid rope movement is necessary.
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Designed to handle the mechanical stresses of heavy loads and fast operation while protecting the wire rope.
Summary:
High Speed Turning Blocks are essential tools in modern transmission line construction, enabling efficient, safe, and high-speed conductor stringing. Their robust steel construction, high-quality bearings, and ability to accommodate rope connectors make them ideal for demanding field conditions. These blocks are typically ISO and CE certified and widely supplied by manufacturers specializing in transmission line equipment.
This equipment supports the rapid and safe installation of overhead power lines by combining durability, high load capacity, and smooth operation at speeds up to 80 m/min.
