Railway rail fasteners are parts on the track used to connect rails and sleepers (or other types of under-rail foundations), also known as intermediate connecting parts. Its function is to fix the rail on the sleeper, maintain the gauge and prevent the longitudinal and lateral movement of the rail relative to the sleeper. The railway rail fastener system is divided into: shrapnel fastener system, gusset fastener system, and elastic strip fastener system. The gusset type fastener is composed of a gusset plate, a threaded spike, a spring washer, an iron seat and a buffer pad. The threaded spike is anchored in the reserved hole of the concrete sleeper bearing platform with sulphur cement mortar, and then the gusset plate is fixed by bolts. fasten.

There are elastic strips I, II and III types of clip fasteners. Type I elastic strip is composed of ω elastic strip, screw spike, gauge baffle and rubber pad. Its buckle pressure is insufficient and the elastic range is too small.
The shape of the elastic strip type II is the same as that of the elastic strip type I, and the elastic range is not less than 10mm. The buckle pressure is higher than that of the elastic strip I type.
Type III spring clip is a shoulderless fastener, which is suitable for heavy transportation and high-density transportation conditions. It has the advantages of high buckle pressure and good elasticity. In particular, the concrete shoulder is eliminated, and the lateral force of the rail bottom is eliminated. possibility of lateral displacement.