The DTVI-2 railway fastening system is an elastic separated fastening solution widely used in metro track engineering, specifically designed to meet metro line requirements for vibration reduction, adjustability and stability in urban rail transit applications.
Structurally, the system consists of spring clips, insulated gauge blocks, baseplates, rail pads, plate pads, T-bolts, nuts and flat washers. It employs Type I spring clips providing reliable clamping force to securely fasten rails. The insulated gauge blocks, made of high-strength engineering plastics, serve dual functions of electrical insulation and gauge adjustment through interchangeable blocks of different specifications. The ductile iron baseplates offer stable support, working with dual-layer elastic pads (rail pad + plate pad) to form the two-stage elastic structure that ensures superior vibration damping performance.
Performance-wise, the DTVI-2 system demonstrates multiple advantages. Its outstanding vibration reduction comes from the two-stage elastic design with relatively low vertical static stiffness, effectively absorbing train-induced vibrations and minimizing environmental impacts. The system provides ±10mm gauge adjustment through different thickness gauge blocks and approximately 15mm vertical adjustment via variable rail pad thickness, accommodating track parameter modifications during both construction and operation. Excellent insulation performance is guaranteed with insulation resistance exceeding 10⁸Ω for both gauge blocks and elastic pads, ensuring proper track circuit functioning.
In application, the DTVI-2 fasteners are primarily used in general vibration reduction sections of metro main lines and branches, having been adopted in multiple metro lines in cities like Guangzhou and Shenzhen. The design thoroughly considers metro operational characteristics including high train frequency and significant vibration loads, enabling long-term performance under repeated impacts while maintaining stable rail positioning - providing a solid track foundation for safe and efficient metro operations.
GNEE RAIL is a professional trading company focusing on the export of railway fasteners, committed to providing reliable rail connection products for global railway construction projects. The main products include a full range of railway fasteners such as various spring clip fastener systems, sleeper bolts, anti-loosening washers and insulating components, which are suitable for various application scenarios such as conventional railways, heavy-duty railways and urban rail transit.