STX-220 Railway Platform Ground-Level Coal Unloading Machine

1. Core Features & Advantages

1.1 Zero-Ground Coal Conveying, Low Material Loss & Effective Dust Suppression for Eco-Friendly Operation

The fully enclosed conveyor structure completely prevents coal spillage onto the ground, drastically reducing material waste and dust emissions to meet stringent environmental protection standards for railway freight yards. It fundamentally resolves the prominent drawbacks of excessive dust and severe coal loss brought by traditional loading and unloading processes.

1.2 Integrated All-in-One Structure, Simplified Workflow & Small Footprint

This machine integrates digging, loading and conveying into a single unit. It directly transfers coal from railway wagons to trucks without intermediate stockpiling and secondary transshipment, cutting redundant operation steps and saving valuable storage space within freight yards.

1.3 High-Power Dual-Drive Motor System for Stable Continuous Heavy-Duty Operation

Equipped with a 55kW main digging motor and a pair of 22kW conveyor drive motors, all running at a rated speed of 1450 r/min. Its adjustable handling capacity ranges from 3 to 10 tons per minute, supporting uninterrupted high-volume coal transfer for large-scale coal terminals.

1.4 Globally Sourced Premium Hydraulic Components, Stable Operation & Ultra-Low Leakage

The hydraulic system adopts world-famous brand parts: Kawasaki variable displacement piston pump, US Parker main control valve and South Korean Doosan travel motor. All hydraulic cylinders are fitted with imported Hengli sealing assemblies, while high-pressure hoses are supplied by Italian manufacturers and Qingdao Rubber Six. The system operates reliably under a working pressure of 30MPa with negligible oil leakage risks during long-hour heavy loads.

1.5 Automatic Cable Reel, Labor-Free Long-Distance Mobility

Fitted with a standard 100m automatic cable retraction system. It automatically winds and unwinds power cables as the machine travels, removing manual cable tidying work and avoiding cable scratch, torsion and damage hazards.

1.6 Fully Sealed Dust & Noise-Isolated Cab for Comfortable, Safe Operation

The fully enclosed operator cab effectively blocks coal dust and mechanical running noise, creating a pleasant working environment. It features a wide unobstructed viewing window and ergonomically arranged control handles to relieve operator fatigue during extended shifts.

1.7 Modular Assembly Design, Easy Maintenance & Convenient Spare Parts Supply

Core components adopt highly standardized, interchangeable modular structures, simplifying spare parts procurement for overseas port and coal yard projects. No special professional tools are required for disassembly and routine inspection, greatly shortening equipment downtime and lowering overall maintenance expenses.

1.8 Heavy-Duty Crawler Chassis with Excellent Site Adaptability

Wide contact-area crawler tracks deliver stable driving performance on concrete and gravel yard ground. Flexible skid steering allows free movement within narrow railway platform spaces, compatible with both newly built and old renovation freight terminals.

2. Product Overview

The STX-220 crawler coal unloader is special-purpose bulk coal transfer equipment designed for unloading coal from railway wagons. Adopting zero-ground-level enclosed conveying technology, it avoids coal scattering on the ground, effectively cutting material loss and dust pollution, making it ideal for round-the-clock continuous operation at large coal storage yards and railway freight terminals.

The machine has an operating weight of approximately 20 tons and overall transport dimensions of 10277 × 5530 × 3550 mm, with a flexible bulk coal handling capacity of 3–10 tons per minute to sustain high-efficiency loading operations.
It is equipped with a large digging bucket sized 1250×950×450 mm, matched with a 1.2m-wide conveyor belt running at 2 m/s with a 22° tilt angle, which ensures smooth, jam-free material conveying. The dual-motor power configuration consists of a 55kW main digging & feeding motor plus two independent 22kW belt drive motors, with a rated motor speed of 1450 r/min to output stable power under heavy working loads.

The hydraulic system is assembled with top-tier international brand components: Kawasaki variable displacement piston main pump, US Parker main control valve and South Korean Doosan travel motor. All hydraulic cylinders are equipped with imported Hengli seals, and high-pressure hoses are sourced from Italian manufacturers and Qingdao Rubber Six. With a rated working pressure of 30MPa, rated flow of 220 L/min and a 220L large-capacity hydraulic oil tank, the system delivers outstanding durability and minimal leakage during prolonged heavy-duty operation.

A standard 100m automatic cable reel is configured to eliminate manual cable arrangement during long-distance relocation. The fully enclosed cab isolates dust and noise to greatly improve operator working conditions. Thanks to its integrated digging, loading and conveying functions, coal can be directly transferred from railway carriages to trucks without intermediate stacking, saving yard space and simplifying overall handling procedures.

The modular assembly design delivers high interchangeability for all core components, facilitating spare parts purchasing and daily maintenance for overseas coal and railway terminals. Fully mechanized operation replaces traditional manual loading and unloading, slashing labor costs and coal spillage losses. It serves as an efficient, eco-friendly core solution for bulk coal handling at railway platforms.

3. Technical Parameters