Overhead Power Transmission Line Tension Stringing Equipment Cable Pulley Block
For overhead power transmission line tension stringing, cable pulley blocks are essential tools used to support and guide conductors during installation, reducing friction and protecting cables from damage.
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For overhead power transmission line tension stringing, cable pulley blocks are essential tools used to support and guide conductors during installation, reducing friction and protecting cables from damage.
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: Typically made with high-strength MC nylon or aluminum sheaves (wheels) combined with galvanized steel frames for durability and corrosion resistance. Sheaves often have rubber linings to protect conductors.
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: Pulley blocks come with varying wheel diameters (e.g., 508 mm, 822 mm, 1040 mm) and can have multiple sheaves (1, 3, 5, or more) to accommodate single or bundled conductors.
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: Depending on size and design, rated loads range from about 5 kN for small blocks to over 110 kN for large three-wheel blocks. For example, a three-wheel nylon pulley block with 1040 mm diameter wheels can handle up to 110 kN load, suitable for conductors up to 1000 mm² cross-section.
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: Used for stringing overhead power lines including ACSR conductors, OPGW (Optical Ground Wire), ADSS (All-Dielectric Self-Supporting) cables, and communication lines. Pulley blocks reduce conductor wear and facilitate smooth pulling during stringing operations.
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: Many manufacturers offer custom sizes and configurations based on project requirements.
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Model 508 Large diameter stringing block
|
Order number |
Model |
Number of wheel |
Rated load(kN) |
Weight (kg) |
Features |
|
10101 |
SHD508 |
1 |
20 |
18 |
Cemented Aluminous sheave |
|
10102 |
SHS508 |
3 |
40 |
61 |
Middle :cast steel sheave Conductor: cemented aluminous sheave |
|
10103 |
SHW508 |
5 |
60 |
93 |
|
|
10104 |
SHDN508 |
1 |
20 |
16 |
MC nylon sheave |
|
10105 |
SHSLN508 |
3 |
40 |
47 |
Middle :MC nylon sheave Conductor: cemented aluminous wheel |
|
10106 |
SHWLN508 |
5 |
60 |
79 |
|
|
10107 |
SHSQN508 |
3 |
40 |
43 |
MC nylon sheave |
|
10108 |
SHWQN508 |
5 |
60 |
70 |
﹒Note :
1. Maximum suitable conductor LGJ400.
2. Block dimension ( outside diameter× root diameter × sheave width) Φ508×Φ408×75
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Pulley blocks are mounted on towers or temporary supports during stringing to guide the conductor along the route.
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Larger diameter sheaves reduce bending stress on conductors and minimize friction.
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Multiple sheave blocks enable stringing of bundled conductors simultaneously, improving efficiency.
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Rubber linings on sheaves protect conductor surface and reduce wear.
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Proper selection depends on conductor size, stringing tension, and project specifics.
These pulley blocks are vital for efficient, safe, and damage-free overhead power line conductor installation.
If you need specific product recommendations or custom solutions, manufacturers like Ningbo Changshi provide a range of pulley blocks tailored for overhead transmission line stringing.
