Description
Technical Parameters
Railway Fishplate Functional Specifications
| Function Category | Technical Description | Implementation Method | Application Scenarios |
|---|---|---|---|
| Rail Joint Connection | Mechanically connects adjacent rails while maintaining expansion gap (6-10mm) | 4/6-hole bolting (M24 Grade 8.8 bolts) | Conventional tracks, switch areas |
| Load Transfer | Transmits vertical/lateral wheel loads (up to 70kN/mm²) | High-strength steel (Grade 70E) + full rail web contact design | Heavy-haul lines, sharp curves |
| Thermal Expansion Control | Allows longitudinal rail movement (±15mm @ 50°C ΔT) | Oval bolt holes | Regions with large temperature variations |
| Electrical Isolation | Blocks track circuit current (insulated type) | Nylon 66 insulation layer (≥10kΩ resistance) | Electrified sections, signaling zones |
| Rail Height Compensation | Matches worn rail profiles (1-3mm shim adjustable) | Stepped design or adjustable shims | Rail repair sections, high-wear zones |
| Vibration Damping | Reduces wheel-rail impact noise (5-8dB reduction) | Rubber pads/composite materials | Urban transit, residential areas |
Fishplate Type Comparison
| Type | Key Feature | Load Capacity | Typical Service Life |
|---|---|---|---|
| Standard | Grade 50E steel | 500MPa | 8-12 years |
| Insulated | GF-reinforced PA66 | 400MPa | 6-10 years |
| Heavy-duty | Grade 70E steel | 700MPa | 10-15 years |
| Joggled | Vertical alignment | 550MPa | Special applications |
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