What is fish plate?
Fish plates in railway tracks are used to connect rails end to end with the help of fishtail bolts. Because its cross-section looks like a fish, it is traditionally called a fish plate.
The functions of the fish plate are:
1) Connect the rail ends to maintain the line and level of the rail end top platform and the rail gauge surface, and use closely spaced sleepers to resist impact and prevent rail joints from deflection.
2) Transfer the load of the wheels from one rail to another rail.
3) Provide vertical and lateral stiffness for rail joints.
4) The end of the rail is allowed to expand and contract due to temperature changes.
Different types of fishplates and their usage:
1) Ordinary fish plate: Provide continuous support and maintain the line and level. Used to connect monorails, short welded rails, light water reactor buffer rails, turnouts and their approach paths, etc.
2) One-meter-long fishplate: This is a better alternative to ordinary fishplates in high-density lines. It is generally used for light-water reactor laying, light-water reactor stress relief, rail fracture repair, bridges and approaches, CMS Crossing and so on. Explain that rail joints used on Mono Block Concrete (MBC) sleepers should use a one-meter long fish plate.
3) Combined fish plate: A set of four combined fish plate is used for the connection of two different rail sections (60 kg-52 kg or 52 kg-90 R Rail section). The four fishplates are different from each other. In addition to their part numbers and the part of the rail used for fishing, they are also marked with IR, OR, IL and OL (right in, right out, left in, and left out). The full-length rail should be used without clearance with the combined fishplate.
Introduction of Insulated Railway Fishplate:
In common sense, railway fishplates or rail joints are conductive metal rods. In order to meet the need for electrical insulation of steel rails, insulated railway fishplates as a new railway technology are also widely used in today's railway construction.
The railway insulated fishplate is made of thermosetting material, which has the characteristics of anti-rust, anti-corrosion, anti-ultraviolet, non-conductive, and non-magnetic. These features make the insulated rail joints impossible to reprocess, so they will not be stolen.
Joggled fish plate introduction:
Joggled fishplates are usually used to connect two rails of the same or different cross-sections together to provide emergency repairs to damaged welded rails or broken rail sections. In addition, it has a wide range of uses in areas where welded joints are broken or defective.
As an emergency fixture, it can achieve quick and temporary repair, allowing continuous movement through the part at a reduced linear speed. Forged and machined serrated fishplates are very useful for broken welded rails or broken rail sections.