STX-220 Ground-Level Coal Unloading Machine for Railway Platforms – Product Overview

1. Core Features & Advantages
2. Zero-ground coal conveying, eco-friendly with low loss & dust suppression
   Fully enclosed conveyor structure prevents coal from falling on the ground, drastically cutting material spillage loss and dust emission, complying with strict environmental standards for freight yards. It solves the pain points of heavy dust and coal loss caused by conventional loading & unloading methods.
3. Integrated all-in-one design, fewer procedures & less yard space occupied
   Combines digging, loading and conveying in one unit. It directly transfers coal from railway wagons to trucks without intermediate stacking and secondary handling, simplifying workflows and saving valuable yard storage space.
4. High-power dual-motor system, stable performance for continuous heavy-duty work
   55kW main digging motor plus dual 22kW conveyor drive motors with rated speed of 1450 r/min. The adjustable capacity ranges from 3 to 10 tons per minute, supporting non-stop heavy loading for large coal terminals.
5. World-class full hydraulic components, stable operation & low leakage rate
   Equipped with Kawasaki variable displacement piston pump, American Parker main control valve and Korean Doosan travel motor. All cylinders adopt imported Hengli seals, while high-pressure hoses are sourced from Italian manufacturers and Qingdao Rubber Six. It operates stably under 30MPa high pressure with extremely low oil leakage risk.
6. Automatic cable reel, labor-saving for long-distance movement
   Standard 100m auto cable retraction system automatically winds and unwinds cables during machine travel, eliminating manual cable sorting and avoiding cable damage risks.
7. Fully enclosed dust & noise-proof cab, comfortable & safe operation
   The sealed cab isolates coal dust and mechanical noise, delivering a pleasant working environment for operators with wide vision and ergonomic control layout to reduce fatigue during long shifts.
8. Modular structure, easy maintenance & spare parts supply
   Highly standardized interchangeable components simplify spare parts procurement for overseas projects. Disassembly and inspection require no special tools, shortening downtime and cutting maintenance costs.
9. Crawler chassis with strong site adaptability
   Large contact area tracks ensure stable driving on concrete and gravel yard surfaces. Flexible turning enables free movement in narrow railway platforms, compatible with both new and old freight terminals.
10. Product Overview

The STX-220 crawler-type coal unloader is dedicated equipment for bulk coal transfer from railway wagons. Adopting zero-ground unloading technology with fully enclosed conveying, it avoids coal falling on the ground, cutting material loss and dust pollution effectively. It perfectly fits long-duration continuous operation in large coal storage yards and railway freight terminals.

Weighing about 20 tons with overall dimensions of 10277 × 5530 × 3550 mm, the machine delivers a handling capacity of 3–10 tons of bulk coal per minute, with reliable high-volume loading performance.
It is equipped with a large 1250×950×450 mm digging bucket, matched with a 1.2m-wide conveyor belt running at 2 m/s with a 22° inclination angle, which guarantees smooth material conveying without blockage. The dual-motor power configuration includes a 55 kW main motor for digging and feeding, plus two 22 kW independent motors for belt drive. Rated motor speed reaches 1450 r/min to provide stable power under heavy loads.

The hydraulic system is assembled with premium international components: Kawasaki variable displacement piston main pump, Parker main control valve from the US, and Doosan travel motor from South Korea. All cylinders are fitted with imported Hengli seals, and high-pressure hoses are supplied by Italian manufacturers and Qingdao Rubber Six. The system runs at a rated pressure of 30 MPa and rated flow of 220 L/min, with a 220 L hydraulic oil tank, delivering outstanding durability and minimal leakage during long-hour operation.

A standard 100-meter automatic cable reel is installed to save manual cable sorting during long-distance movement. The fully enclosed cab blocks dust and noise, greatly improving operators’ working conditions. Integrated digging, loading and conveying functions enable direct coal transfer from railway carriages to trucks without intermediate stockpiling, saving yard space and simplifying handling steps.

Modular assembly design ensures high interchangeability of core components, making spare parts procurement and routine maintenance easy for overseas mining terminals. Mechanized operation fully replaces manual loading and unloading, lowering labor costs and coal spillage loss. It is the core solution for clean and high-efficiency bulk coal handling at railway platforms.

III. Technical Parameters