ZYTJX-250 Series Hydraulic Rail Clamp

ZYTJX-250 series hydraulic rail clamp

The ZYTJX-250 series is a robust, spring-applied and hydraulically released rail clamp (also known as a rail brake or track clamp). It serves as a critical safety device for large outdoor rail-mounted machinery, automatically securing the equipment to the tracks during shutdowns or power failures to prevent it from being blown away by strong winds or other external forces.

The model number breakdown is generally understood as follows:

ZYTJX / TZJ: The series designation for a hydraulic spring rail clamp.

250: Indicates the Anti-skid Force (Holding Force) of 250 kN (approx. 25 tons).

💡 Key Features & Characteristics

Fail-Safe "Normally Closed" Operation:

Spring-to-Clamp, Hydraulic-to-Release: The clamping action is powered by strong internal springs. To release the clamp and allow the machine to move, a hydraulic pump is energized to push a piston, which compresses the springs and opens the clamp jaws.

Automatic Safety: When the machine shuts down or experiences a power outage, the hydraulic pressure is released, and the springs instantly force the jaws to clamp tightly onto the rail, securing the machinery.

High-Performance Specifications (ZYTJX-250):

Anti-skid Force: Delivers a powerful holding force of 250 kN.

Hydraulic System: Powered by a 3 kW motor, operating at a rated pressure of 14 MPa.

Rail Compatibility: Designed to fit a wide range of standard crane rails, including QU120, QU100, QU80, QU70, P60, P50, P43, and P38.

Intelligent Control & Safety Interlocks:

Walking Interlock: The system is electrically interlocked with the main machine's travel circuit. The main machine is strictly prohibited from moving unless the rail clamp is fully opened.

Automatic Pressure Maintenance: Due to potential minor hydraulic internal leaks, the clamp's opening might slightly decrease over time. The system features a limit switch that detects this drop; it automatically triggers the pump motor to briefly re-pressurize the system, restoring the full open position without interrupting the machine's operation.

Adjustable Clamping Speed: The closing speed of the clamp jaws can be finely tuned via a throttle valve on the hydraulic manifold. This ensures the main machine comes to a complete stop before the jaws make contact with the rail, preventing severe damage to both the clamp and the track.

Robust & Maintenance-Friendly Design:

Heavy-Duty Construction: Built with high-strength beams, connecting rods, and specialized clamp jaws to withstand harsh outdoor environments.

Easy Maintenance: Features standard lubrication points (grease nipples) for moving parts. The hydraulic system requires an oil change after the first 400 hours of operation, and typically once a year thereafter.

Wear Monitoring: The toothed surface of the clamp jaws should be inspected during major overhauls and replaced if the wear exceeds 10%.

🏭 Typical Applications

The ZYTJX-250 series is essential for securing massive outdoor machinery in exposed environments:

Port & Logistics: Large container gantry cranes (RMGs), rail-mounted gantry cranes, and bulk material handling equipment.

Power & Mining: Stackers and reclaimers used in large coal yards, ore fields, and power plants.

Heavy Industry: Various bridge cranes and portal cranes operating on outdoor tracks.

📋 General Technical Specifications

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Note: The ZYTJX-250 is a vital safety component for outdoor rail-mounted equipment. During installation, precise alignment of the clamp center with the crane's wheel center is crucial. Furthermore, the walking interlock and the clamping time-delay must be rigorously tested to ensure the machine never attempts to drive while the clamps are engaged. Regular monthly inspections of the limit switches and hydraulic oil levels are highly recommended to guarantee fail-safe performance.

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