Rail joint is sometimes called fishplate, which is a kind of connecting rail fastener, mainly used to connect two adjacent steel rails. There are lots of rail joint types, which are suitable for different types of rails, different insulation environments, and different material requirements. Different types of rail joints have slightly different materials and shapes.
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As for the rail joint types, we have talked about many kinds before. For example, according to different installation methods, there are bolted rail joints, welded rail joints, and glued joints; according to different production standards, there are GB standard rail joints, BS standard rail joints, American standard rail joints. AS standard rail joints, UIC standard rail joints, etc. Today, we will introduce some other different rail joint types from different angles.
The shock-absorbing rail joint is a rail joint whose outer side of the main body is raised from both ends upward, the middle section is higher than the road rolling surface, and the upper end of the overall main side is a double-slope-shaped rail joint. The basic structure of a shock-absorbing rail joint is the same as that of an ordinary rail joint, and it still maintains a strip splint structure. The side facing the steel rail maintains the shape of a double-reinforced clamping groove, and a bolt hole is arranged in the clamping groove.
Weld a piece of reinforcing iron to the top of the rail joint on the outward side of the rail. The top surface of reinforcing iron is flush with the top surface of the rail so that the outer side is less than the width of the wheel tread. This is the difference between shock-absorbing rail joint and ordinary rail joint. The shock-absorbing rail joint not only plays the role of connecting the rails, but also gradually loads the pressure on the end surface of the main side of the rail joint when the wheel approaches the seam of the rail. Therefore, the impact vibration of the wheel passing through the rail gap is reduced, and the effect of effective shock absorption is achieved. The shock absorbing rail joint has a simple structure and low cost, which can effectively ensure driving safety.
Composite rail joint, also called integrally insulated rail joint, is made of high-performance polyurethane resin as the matrix material and glass fiber as the reinforcing material through a pultrusion process. It is another composite railway fastener made of new materials.
The composite rail joint can achieve the overall insulation effect due to the superior performance of its material. Composite rail joint is an innovative rail joint product made of new materials, which can completely replace the mechanically insulated rail joint and glued rail joint that are currently in service on railway operating lines. It can also fundamentally eliminate the hidden danger that the insulating tube and the insulating gasket are easily damaged, causing the "red band" of the track circuit to appear and affecting the safety of train operation.
Glued insulated rail joint is a kind of high-strength rail insulated rail joint. It places rail end insulating parts at the ends of two connected rails, and the slot insulating plate is clamped on both sides of the joint. Two reinforced rail joints are installed in the grooves of the insulation board and are tightened by inserting high-strength bolts into the holes reserved for the joints.
There are two different types of insulation boards, each of which consists of seven layers. The first type of insulation board adopts a mesh glass cloth trough structure. Its first, third, fifth and seventh layers are paste insulating glue, the second and sixth layers are mesh glass cloth, and the fourth layer is thickened glass cloth. The second type of insulation board is an electric heating sheet grooved insulation board. Its first, third, fifth, and seventh layers are insulating film, the second and sixth layers are glass cloth, and the fourth layer is an electric heating sheet with holes.
The rail expansion joint is used to connect the expansion joint between two sections of rail. There are usually two types of rail joint treatment at the expansion joint: one is connected by splint or rail expansion joint, the rail uses 45° slanted joint, and the gap is 10mm. The other is connected by splicing splints that are processed according to the shape of the rail head, with a gap of 50mm.
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Rail joints, usually called fishplate, commonly known as the joint bar, is a component that joint rails end-to-end. It is applied to light rail, heavy rail and crane rail. There are holes in the middle of the fish plate for rail bolt to screw. The top and bottom of the fish plate are made into slopes corresponding to the slope of the lower part of the railhead and the top part of the rail bottom. Thanks to the design which helps the joint bars wedge the rails, the rail joints can be bolted to the rail very tightly. Therefore, good rail joints can reduce the impact of wheels at the joint and improve the smoothness of the passing trains.
While welded rails are quickly developed and used more often, the rail joints still have their advantages of saving cost and labor since its simple and quick installation. The working state and safety performance of the rail joints directly affect the running state and safety of the line.
According to the raw materials used, rail joints can be divided into ductile iron, Q235 type, and Q255 rolling type, forging type, etc. In general, medium and high carbon steels are used as raw materials. According to different applications, rail joints can be divided into bolted rail joints, compromise rail joints and insulated rail joints.
Bolted rail joints are the primary choice for slow-speed, light transport railroads.
Compromise rail joints are needed when connecting two rails with different sizes. Unlike regular standard linear rail joints, compromise rail joint bars have irregular shapes.
bolted rail jointcompromise rail jointInsulated rail joints are a new kind of track material made of high strength composite material. Belong to thermosetting material, the insulated rail joints can&#;t be reprocessed. Insulated rail joints can provide signals when the trains get to a position through electric isolation. Thus, it is widely used in the freight railroad to detect outages and control traffic jams.
Feature of insulated joints&#;
Rail Joints for Sale
AREMA
TypeLength/DiameterWeight115RE4 hole-24&#;17.04Kg115RE6 hole-36&#;25.56Kg132-136RE4 hole-24&#;17.75Kg132-136RE6 hole-36&#;26.63KgUIC864
TypeLength/DiameterWeightUIC604 hole-630/Φ.07KgUIC604 hole-600/Φ.47KgUIC604 hole-630/Φ.1KgUIC544 hole14.34KgUIC546 hole-.94KgBS 47-1
TypeLength/DiameterWeightBS75R4 hole6.56KgBS60A4 hole5.61KgBS80A4 hole6.5KgBS90A685.8/Φ.23KgBS90A792.9/Φ26.215.34KgBS100A4 holeAS
TypeLength/DiameterWeight50kg4 hole14.3Kg50kg6 hole19.5KgOther track material such as gauge rods, rail clip, rail clamp, rail pad are available as well.