30 kN Dual Rope Push/Pull Winch
30 kN Dual Rope Push/Pull Winch
Two 30 kN electric dual rope push/pull winches built in Yatala to open and close blast-proof ventilation doors in a mine, with one rope paying out as the other winds on and a manual override crank so the doors still operate in a power failure.
Push/Pull Winch Project Overview
Custom-built 30 kN electric winches for blast-proof doors in mine ventilation
Two 30 kN dual rope push/pull winches designed with the client for the rapid opening and closing of blast-proof ventilation doors in an underground mine. Each winch carries two ropes on one drum: as one rope winds on, the other winds off, and each rope runs through a series of sheaves to opposite ends of the door. Reversing the winch swings the door open or shut, so the same machine both pushes and pulls without a separate return mechanism. A manual override crank handle lets the crew operate the doors during a power failure, which is exactly when ventilation control matters most. Both winches were engineered, built and tested at our Yatala, Queensland workshop.
Key Project Highlights
Exceptional performance, precision and reliability
These 30 kN dual rope push/pull winches were engineered for fast, reliable operation of blast doors in mine ventilation circuits. Headline specifications:
30 kN
Rated Capacity
20 m
Rope Storage
Mining
Industry
Blast Doors
Application
Design & Manufacturing Considerations
Built for durability and efficiency in demanding environments
Specified jointly with the mine ventilation team and assembled in-house at Yatala. Key design considerations:
Heavy-Duty
Steel Frame
Material Choice
Electric
Single phase
Power System
30 kN
Rated Line Pull
Drive System
Manual
Standard control
Control / Brake
Operational & Technical Breakdown
An in-depth look at the 30 kN dual rope push/pull winch's performance and technical capabilities
The drum is split into two grooved sections with the ropes anchored so they wind in opposite directions. Total rope storage is short, around 20 m per rope, because the door travel is fixed, and the sheave arrangement was designed with the winch so rope angles and fleet angles stay within limits at both ends of the stroke. The drum, gearbox and electric motor sit on a compact fabricated frame with a guard over the drum and output shafts, and both units were built to the same drawing.
An electric motor with a spring-applied brake drives each winch, and the brake holds the door in any position when the motor stops. The manual override is a crank handle that engages the drive train through a clutch, so a single person can open or close a door with no power at all. Rope tension, brake torque and the manual effort were all verified during load testing at Yatala before the winches shipped underground.
Other Winch Applications
Versatile winching solutions across multiple industries.
Beyond mining, dual rope push/pull winches suit any heavy door, gate or dividing wall that has to move both ways on a fixed track under power with a manual fallback.
Opening and positioning heavy doors, gates and dividing walls in factories and warehouses – push/pull rope drives with manual override for safety.
Louvre, hatch and access door actuation on hydro and wind installations – reversible electric winches that move a load in both directions.
Project Conclusion
The 30 kN dual rope push/pull winches gave the mine fast, repeatable blast door operation with a hand-crank fallback for emergencies. Designed, built and tested in Yatala by Australian Certified Winches.
Like every winch we build, it was designed to AS 1418, the Australian Standard for cranes, hoists and winches, and signed off by our RPEQ-registered engineers before load testing in Yatala.
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Frequently Asked Questions
Common questions about push/pull winches for blast doors and heavy door operation.
How does a dual rope winch both open and close a door?
Two ropes share one drum and are anchored to wind in opposite directions. When the drum turns, one rope pays out while the other hauls in, and each rope runs through sheaves to an opposite end of the door. Reversing the motor reverses the door, so one winch does both jobs.
What happens to the blast door in a power failure?
The spring-applied brake holds the door where it is, and a manual crank handle engages the drive train through a clutch so the crew can open or close the door by hand. Ventilation control is never lost while power is down.
Why were the sheaves designed with the winch?
The rope path decides whether a push/pull system works smoothly. Sheave positions, diameters and fleet angles were laid out with the winch so both ropes stay within their working angles from fully open to fully shut, without rubbing or slack building up.
How fast do the doors operate?
The gearing was chosen for rapid opening and closing to suit the mine ventilation procedure, while keeping the door speed controlled at both ends of travel. Speed can be adjusted for other door sizes and travel lengths.
Can the same design be used for other doors?
Yes. The dual rope principle works for any heavy sliding or swinging door on a fixed path. ACW sizes the line pull, rope length and sheave layout to the door mass and travel, and adds the manual override where a power failure fallback is required.
Moving Heavy Doors?
Tell us the door mass, the travel and the operating time you need. Our RPEQ engineers will size a certified push/pull winch for it.