What is the connection of the rail joint?
A part that connects rails or rails and ties. The former is called joint connection parts; the latter is called intermediate connection parts. Its role is to effectively ensure the rail and rail, rail and sleeper between the reliable connection of long-term, continuous rail as soon as possible and integrity, prevent rail relative to the longitudinal movement of the sleeper, ensure the normal track, and give full play to the role of dynamic cushioning performance of vehicles, slow down the line of residual deformation accumulation.
The joint connection parts include plywood, bolts and spring washers. Plywood. Commonly known as fish plate, with the same steel rail made of material. The utility model is mostly double headed, and the upper and the lower sides are inclined planes and are wedged with the bottom surface of the rail head and the top surface of the bottom. Bolts. A fastener that clamps a rail with the pressure of a nut against a splint. In order to prevent the nut from tightening and loosening due to the vibration of the train, a spring washer is required. Bolts are usually made of high carbon steel and should not be too large in diameter to avoid excessive damage to the strength of rails and cleats. Some countries also add a nylon sleeve around the bolts to reduce vibration and prevent the loosening of the nut. Rail joint is the weak link of track. In order to reduce rail joint, the standard length rail can be welded into long rail of certain length.
The intermediate connecting parts, also called fasteners, have different combinations according to the different types of sleepers used. The wooden, including ordinary spike and iron plate. The advantage of this kind of fastener is less parts, easy installation, but little effort. In order to improve the performance of wooden, many countries use screw spike or spring instead of ordinary spike spike, or use a variety of different types of fastener on the concrete sleeper has been effective. The concrete sleeper fastening, including anchor bolts, iron plate, fastening piece and an elastic cushion (a) anchor bolt. For fastening fastening parts by anchoring various methods. The use of China on the railway is a sulfur anchor mix of sulphur, sand, cement and wax mixture is melted into colloid, injected into the reserved hole in the sleeper, as the fixed anchor bolt medium, pulling resistance, durability and insulation performance are very good. (b) iron backing plate. The utility model can disperse the vertical pressure of the rail, and after adding the shoulder, the transverse force transmitted by the rail can be partly taken, but because the compressive strength of the concrete sleeper is very large, the utility model can not be arranged in general. (c) fastening parts. There are two types of rigidity and elasticity. Rigid fastening parts mainly for buckle type; elastic fastening parts are spring and bar use plate elastic strip type two. (d) elastic cushion. When the train passes, the utility model can buffer and reduce vibration, and can improve the insulation performance of the concrete sleeper. Rubber backing plate, plastic backing plate, cork rubber backing plate and wood backing plate etc., and rubber backing plate is the best.
