PU Grouting Machine | Railway Track Slabs
Designed for high-speed rail and metro track construction, the HF-RT600-LP delivers high-volume dispensing up to 60 kg/min with dynamic shear mixing for void-free ballastless track slab damping layers.
High-Capacity Void-Free Track Cushion Polyurethane Grouting
The HF-RT600-LP is a specialized high-output low-pressure polyurethane grouting machine engineered for precision dynamic mixing and rapid void-free filling of ballastless track slab cushion layers and rail damping grooves.
The HF-RT600-LP is a heavy-duty low-pressure polyurethane grouting machine engineered specifically for railway track bed damping and track slab void filling. Addressing the critical requirements of high-speed railway CRTS III slab cushions and metro floating slabs, this equipment integrates high-displacement metering pumps, dynamic high-shear homogenization, and rapid-response pneumatic anti-drip valving to fill long, narrow cavities without cold joins or trapped air.
Unlike conventional low-output dispensing units, the HF-RT600-LP delivers continuous outputs up to 60 kg/min. Its multi-zone heating and insulated recirculation circuits ensure optimal fluid viscosity even during extreme outdoor ambient conditions. With automated flow matching and closed-loop stoichiometric control, the machine supports uniform cell structure and exceptional vibration attenuation across thousands of track kilometers.
Material Flow and Working Principle
Thermal Conditioning & Recirculation
Polyol and isocyanate components are conditioned in heated stainless steel day tanks with continuous mechanical agitation and circulated through temperature-regulated hoses to maintain balanced processing viscosities.
Synchronized Closed-Loop Metering
High-torque servo motors drive rotary gear metering pumps, while dual Coriolis mass flow meters measure real-time mass flows, automatically compensating pump speeds to keep the mixing ratio within ±0.5%.
High-Flow Dynamic Shear Mixing
The two component streams enter a high-volume dynamic mixing chamber equipped with a multi-stage helical rotor, thoroughly blending the high-viscosity reactive resin without introducing air pockets.
Direct Track Slab Grouting & Anti-Drip Cutoff
The grouting slurry is injected directly into track slab grout holes via quick-connect sealed nozzles; upon reaching target volume, an automated snuffer piston seals the tip and executes an instant air-blast clearing cycle.
Model and Technical Parameters
Configuration values from the supplied equipment brief. Final settings and capability are confirmed for the selected material and project conditions.
| Technical Parameter | HF-RT600-LP |
|---|---|
| Components | 2 Components (A: Polyol blend, B: Polymeric MDI) |
| Output Range (g/s) | 10.0 to 60.0 kg/min (Continuous adjustable) |
| Mixing Ratio Range | 100:30 to 100:150 (By weight) |
| Ratio Accuracy | ±0.5% (Measured under laminar flow condition) |
| Power Supply | 380V, 3-Phase, 50Hz (Custom 460V 60Hz optional) |
| Working Pressure | 0.3 to 1.0 MPa (Metering pipeline and mixing head) |
| Tank Capacity (L) | 300 L (Tank A) + 300 L (Tank B) stainless steel |
| Weight | 2,100 kg (Empty configuration on mobile skid) |
| Dimensions (L×W×H) | 2600 mm x 1800 mm x 2150 mm |
Key Equipment Features
The Haifeng package includes the mobile high-output grouting skid, heated transfer hoses, dynamic mixing head, backpressure monitoring and agreed operator training. Road-rail carriers and diesel generators are optional. The PU grout is supplied by the selected material supplier; site lifting and compressed air are customer interfaces.
High Discharge Output
Delivers variable output from 10 to 60 kg/min, allowing rapid filling of a 5.6-meter track slab cavity in less than 4 minutes.
Closed-Loop Stoichiometric Control
Coriolis mass flow meters continuously feed back real-time mass data to maintain mix ratio accuracy within ±0.5%.
Solvent-Free Air-Blast Purge
Automated pneumatic cutoff and instantaneous high-pressure air blast eliminate solvent use and environmental contamination on track sites.
All-Weather Field Heating
Integrated multi-zone heating and insulated jacketed hoses maintain fluid process temperatures up to 60°C across cold ambient rail environments.
