About Stringing Block
We are counted as the well-known name engaged in offering of quality approved Stringing Block. Provided stringing blocks are widely used in applications where conductors are larger, heavier and stiffer. High strength, corrosion resistance, durable finish and less maintenance are features of offered product. Finding wide application in construction, mechanical and various other industries, we offer this Stringing Block at the most affordable price to our valuable customers.
A stringing block is a specialized pulley system with a grooved sheave (wheel) that guides and supports conductors or cables during their installation on overhead transmission lines or other structures. It protects the conductor by providing a smooth, rolling surface, preventing friction and damage, and is designed to be temporarily suspended from a structure using its fittings and mounted on ball bearings for reduced friction. Stringing blocks are crucial for ensuring the safe and efficient placement of various conductors and cables, including ACSR and OPGW, ensuring proper sag and tension.
Key Features and Function
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The core component is a grooved wheel (sheave) made from materials like aluminum alloy, high-strength nylon, or neoprene-lined for durability and low friction.
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Ball Bearings:
Sheaves are mounted on anti-friction ball bearings to minimize friction and ensure smooth operation during conductor pulling and tensioning.
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High Strength and Flexibility:
The blocks are built with high-strength materials like aluminum alloy to be strong, durable, yet lightweight for ease of use.
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Fittings:
These are attachment points, such as hooks, clevises, or round eyes, that allow the block to be temporarily attached to poles, cross arms, or insulators.
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Conductor Protection:
The smooth, low-friction surface of the sheave prevents the conductor from being damaged during the pulling process.
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Overhead Conductor Stringing:
The primary use is to string various types of overhead conductors and cables, such as ACSR (Aluminum Conductor Steel Reinforced) and OPGW (Optical Ground Wire).
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Tangent Structures:
Stringing blocks are specifically designed for use on tangent structures, which are the straight sections of overhead lines.
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Support for Components:
They are used to support the conductors as they are pulled through the installation, allowing compression sleeves and swivel connectors to pass through the block's groove.
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1. Attachment:
The block is temporarily attached to the overhead structure using its fitting.
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2. Conductor Placement:
The conductor is then threaded through the grooved sheave of the block.
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3. Pulling:
As the conductor is pulled, the sheave rotates on its bearings, guiding the conductor smoothly and preventing it from dragging on the ground or getting tangled.
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4. Removal:
Once the conductor is properly installed, the stringing block is removed from the structure.