YJGQ-31 Hydraulic Rail Clamp

YJGQ-31 hydraulic rail clamp

The YJGQ-31 is a Spring-Hydraulic Rail Clamp (also known as a Rail Clip or Track Clamp). It is a safety device designed to secure rail-mounted cranes against strong winds and accidental movement.

The model number indicates:

YJGQ: The series designation for Hydraulic Rail Clamps.

31: The nominal Clamping Force of 315 kN (approx. 31.5 tons of force).

This device is typically installed on the legs of gantry cranes or bridge cranes to lock them onto the rail tracks when not in operation or during storms.

💡 Key Features & Characteristics

Fail-Safe Operation (Normally Closed):
The YJGQ-31 operates on a "spring-clamp, hydraulic-release" principle.

Power Off (Braking): When the hydraulic power unit is de-energized, strong compression springs force the clamp jaws to grip the rail head, locking the crane in place.

Power On (Release): To move the crane, the hydraulic pump is energized. The hydraulic cylinder overcomes the spring force to open the jaws, allowing the crane to travel.

High Clamping Force:
With a clamping force of 315 kN, this unit is designed for heavy-duty applications, capable of withstanding significant wind loads (often rated for typhoon-level winds depending on the installation configuration).

Rail Compatibility:
It is designed to fit standard crane rails, typically compatible with rail sizes such as QU120, and potentially QU100 or QU80 depending on the specific jaw customization.

Interlocked Control:
The system is designed to be interlocked with the crane's travel mechanism. The crane cannot move unless the rail clamp is fully open (verified by limit switches), and the clamp automatically engages if power is lost.

Robust Construction:
The unit typically features a welded steel housing and is often treated with anti-corrosion coatings (like galvanizing or paint) to withstand harsh outdoor environments like ports and shipyards.

🏭 Typical Applications

The YJGQ-31 is used primarily for outdoor rail-mounted machinery:

Gantry Cranes: Large container gantry cranes and rubber-tired gantry cranes (when on rails).

Port Machinery: Ship-to-shore cranes and portal cranes.

Metallurgy: Outdoor cranes in steel mills.

Wind Protection: Used as a primary or auxiliary anti-wind device to prevent cranes from sliding along the rails during high winds.

📋 General Technical Specifications

Note: The YJGQ series is distinct from wheel-side brakes (like the YLZ series). While wheel brakes clamp the wheel rim, the YJGQ clamps the rail head itself. It is often used in combination with other storm anchors for maximum safety.

Hot Tags: yjgq-31 hydraulic rail clamp, China, manufacturers, supplier, factory, customized