• Follow us
Home > Knowledge > Content
What is the function of connecting part of the railway joint
Nov 17, 2017

Track fastening

Connect rail or rail and sleeper parts.

The former is said to connect the parts;

The latter is called a connecting part.

Its effect is long-term rail can be guaranteed effectively and reliable connection between rail and rail and the sleeper, as much as possible to maintain continuity and integrity of rail, prevent rail vertical movement relative to the sleeper, ensure the normal track, and give full play under the dynamic function of rolling stock buffer damping performance, slow down the accumulation of residual deformation.

Joint connection parts include splints, bolts and spring washers.

1) splint.

Commonly known as fishtail plate, it is made of steel with the same steel rail.

It is double head shape, both sides are inclined plane, with the steel rail head base and bottom top face wedge.

(2) the bolt.

A fastener, with the help of a nut to clamp the steel rail.

Spring washer is required to stop the screw fastening due to the vibration of the train.

Bolts are generally made of high carbon steel, not too large in diameter, so as not to weaken the strength of the rail and splint excessively.

Some countries have also added a nylon sleeve around the bolt to lift the vibration and stop the nut from loosening.

The rail joint is the weak link of the track, so as to reduce the rail joint, the standard length of rail can be welded to a length of long rail.

The intermediate connection parts also refer to the fastener, according to the different sleeper types which are used in conjunction with different combinations.

Wooden pillow fasteners, including ordinary nails and iron pads.

This kind of fastener has the advantage of small parts, convenient installation, but small buckle.

In order to improve the performance of the wooden pillow fastener, many countries use threaded nail or spring spike instead of ordinary spike, or use different types of fastener which have been proved effective on concrete sleeper.

Concrete sleeper fasteners, including anchor bolts, iron pads, presser and elastic cushion, etc. (a) anchor bolts.

For the use of fastening fastener, there are various anchorage methods.

China railway use sulfur on anchoring is based on certain mixture ratio of sulphur, sand, cement and mixed heating molten paraffin wax as colloid, injection hole of sleeper, as medium of fixed anchor bolt, the pulling force, persistence, and insulation performance is very good.

(b) iron pads.

The vertical pressure of the steel rail can be separated, and the lateral force of the steel rail can be partially assumed. However, due to the high compressive strength of the concrete sleeper, it can not be set.

(c) the withholding pressure.

There are two types of rigidity and elasticity.

The rigid crushing is mainly for the plate type;

The elastic hammer has two kinds of shrapnel and rod type.

(d) elastic cushion layer.

When the train passes, it will cushion the shock and increase the insulation performance of the concrete sleeper.

With rubber gasket, plastic gasket, cork gasket and wood pad, the rubber gasket works best.