Railway Fasteners— Railway Embedded Insulating Bushings

• Customization: Available
• After-sales Service: One Year
• Warranty: One Year
• Model NO.: P50
• Customized: Railway Tools
• Certification: ISO9001
• Type: Railway Tools
• Transport Package: Export Wooden Box
• Origin: Handan, Hebei Province, China
• Production Capacity: 10000

Product Description

The main uses of embedded insulating bushings
1. Electrical insulation
Isolate the bolts from the concrete sleepers/track plates to prevent current leakage and ensure the normal operation of the track circuit.
2. Fixing fastener bolts
Provide stable anchoring points for the bolts in the sleepers or track plates to prevent loosening.
3. Anti-corrosion protection
Some insulating bushings are made of weather-resistant materials, which can reduce the corrosion of bolts and extend their service life.
4. Adapt to temperature changes
Allow the rails to slightly shift during thermal expansion and contraction to reduce stress concentration.

The application scenarios of embedded insulating bushings
Insulating sleeves are mainly used in the following railway track structures:
Electrified railway
It is used in automatic block sections, stations and other sections that require track circuits to prevent signal interference.
2. Ballastless track for high-speed railways
Used for CRTS type I/II/III track plates, fixing fastener bolts and ensuring insulation.
3. Metro and Light rail
It is used in areas such as tunnels and elevated sections to ensure the stability of the ATP (Automatic Train Protection) system signal.
4. Turnout section
At parts such as the switch device and the slide bed plate, prevent the bolts from conducting electricity and affecting the turnout control circuit.
5. Bridge and expansion joint sections
Adapt to the deformation of the bridge and avoid excessive force on the bolts due to structural displacement.

 

Advantage Analysis
Advantages
Ensure the insulation reliability of the track circuit.
Enhance the bolt anchoring force and reduce the maintenance frequency.
Some materials (such as FRP) are corrosion-resistant and can adapt to harsh environments.

 

Summary
Core function: Insulation + bolt anchoring, mainly used in electrified sections.
Selection basis: Choose the material based on the type of line (high-speed rail/subway) and the environment (bridge/tunnel).
Standard reference: It must comply with railway industry norms such as "TB/T 3396-2015".