Concrete Embedded Insulation Sleeve is a key supporting component for railway concrete sleepers, specially embedded in precast concrete sleepers during the production process. It is mainly used to insulate and protect the fastening bolts of the track, isolate the electrical conduction between the bolts and the concrete sleeper, and cooperate with the railway rubber pad to further ensure the safe operation of the railway signal system[superscript:4]. The product is made of high-quality engineering plastic insulation materials, with excellent electrical insulation, corrosion resistance and mechanical strength, which can adapt to long-term outdoor harsh service environments such as high and low temperature, humidity and ultraviolet radiation.
|
Parameter Item |
Requirement |
Test Standard/Method |
|
Material |
High-quality Engineering Plastic (PA6/PA66) |
Relevant Railway Industry Standards |
|
Insulation Resistance |
≥10¹⁰ Ω |
GB/T 1410 |
|
Operating Temperature Range |
-40℃ ~ 70℃ |
GB/T 1682 |
|
Tensile Strength |
≥60 MPa |
GB/T 1040 |
|
Impact Strength (Notched) |
≥15 kJ/m² |
GB/T 1043 |
|
Hot Air Aging (70℃, 72h) |
No cracking, no deformation, stable performance |
GB/T 3512 |
|
Bonding Strength with Concrete |
≥2.5 MPa |
TB/T Relevant Standards |