The elastic clip V-type fastener system is a rail fastening system for retaining rails with shoulders. The fastener system consists of screw spikes, flat washers, spring steel rail clips (W2 type, X3 type and A type), Rail Insulators, and steel rails. The lower plate (the rubber pad and the composite pad) and the pre-embedded casing positioned on the prestressed concrete shoulder sleeper. Adjust the height of tie plate when adjusting the height of the rail.
| High Speed Rail Fastening System | ||||||||
| High Speed WJ-7 Rail Fastening System | High Speed WJ-8 Rail Fastening System | High Speed Type V Fastening System | ||||||
| Item | Quantity | Material | Item | Quantity | Material | Item | Quantity | Material |
| Rail clip | 2 | 60Si2MnA | Rail clip | 2 | 60Si2MnA | Rail clip | 2 | 60Si2MnA |
| T-bolt nut washer | 2 | Q235A | Screw spike | 2 | 20MnTiB | Screw spike | 2 | 20MnTiB |
| Rail insulator | 2 | PA66 | Flat washer | 2 | Q235A | Flat washer | 2 | Q235A |
| Material | ||||||||
| Tie plate | 1 | QT450-10 | Rail insulator | 2 | PA66 | Space pieces | 2 | Q235A |
| Insulated buffer plate | 1 | Rubber | Guide plate | 2 | Reinforced Nylon 66 (PA66) | Gauge apron | 2 | Rubber |
| Rail pad | 1 | EVA, or rubber | Rail pad | 1 | EVA, or rubber | Rail pad | 1 | EVA, or rubber |
| Anchor bolt | 2 | Q235A | Tie plate | 1 | QT450-10 | Adjustable pad | 1 | PE |
| Spring washer | 2 | 60Si2Mn | Plastic dowel | 2 | HDPE, Reinforced Nylon 66 (PA66) | Plastic dowel | 2 | HDPE, Reinforced Nylon 66 (PA66) |
| Plain washer | 2 | QT450-10 | Rail adjustable pad | 2 | PE | |||
| Plastic dowel | 2 | HDPE, Reinforced Nylon 66 (PA66) | Tie Plate adjustable pad | 2 | PE | |||
Type V elastic clip fastening system structural features
The Type V elastic clip fixing system is a bolt fastening system, and is an elastic non-separating fastener with a concrete shoulder of the sleeper.
- Screw spikes and sleeves secure elastic strips, improving insulation.
- Large or small buckle pressure spring strips can be installed.
- Under-rail pads (rubber or composite) with different friction coefficients adjust line resistance.
- Plastic rail insulators set gauge distance and provide insulation while reducing stress on spikes.
- Rail height is adjusted by inserting a heightening pad between the under-rail pad and concrete sleeper.
Comparion of Elastic Clip Type IV and V Fastener System
| No. | project | Performance | |
|---|---|---|---|
| Elastic IV type fastener | Type V-Rail fastener | ||
| 1 | Adapt to rail type | China 60kg/m rail | |
| 2 | gauge | 1435mm | |
| 3 | Rail slope | A 1:40 rail bottom slope is placed on the sleeper. | |
| 4 | Rail longitudinal resistance | Each set of fasteners is greater than 9kN. | In general, each set of fasteners is greater than 9kN; for small resistance areas, each set of fasteners is approximately 4kN. |
| 5 | Systematic flexibility | The static stiffness of the under-rubber rubber pad is 60±10kN/mm; the dynamic-static stiffness ratio is not more than 2.0. | |
| 6 | Fatigue performance | The fastener system is tested according to EN13146-4. After 3 million load cycles, all parts are not damaged, the gauge length is less than 6mm, and the buckle pressure, rail longitudinal resistance and node static stiffness meet the following requirements: buckle pressure change ≤ 20 %; Rail longitudinal resistance change ≤ 20%; node static stiffness change ≤ 25%. | |
| 7 | Insulation resistance | The fastener system is tested according to EN13146-5. The insulation resistance between the two rails is greater than 3 Ω·km, and meets the requirements of the track circuit for its insulation resistance. | |
| 8 | Harsh conditions Environmental impact |
The fastener system can be successfully disassembled with a manual disassembly tool after the 300h salt spray test described in EN13146-6. | |
| 9 | Rail left and right position adjustment |
The left-right position adjustment amount of the single- track rail is -4 to +2mm; the gauge adjustment amount is -8 to +4mm, and the adjustment level is 1mm. |
|
| 10 | Rail height adjustment |
Can't adjust | Rail height adjustment position: 10mm; |
| 11 | Buckle pressure and range | The pressure of a single spring bar is not less than 11kN and the span is 13mm. | The commonly used elastic buckle pressure is greater than 10kN, the elastic range is 12mm; the small resistance elastic buckle pressure is 4.5kN, and the elastic range is 9.5mm. |
| 12 | Embedded part pull-out resistance | The pull-out force of the embedded iron seat in the sleeper is not less than 60kN. | The pull-out resistance of the embedded bushing in the sleeper is not less than 60kN. |