Rail joints are widely used to connect two rails together and ensure the trains passing through safety in orbit. According to the position of the sleeper, rail joints can be classified into three types: supported joints, suspended joints and bridge joints./
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Supported joint: a rail joint in a railroad rail having a sleeper directly under the rail ends. On one hand, it would reduce the wear and tear of the rail through supporting the rail joint. On the other hand, such supporting joint makes the joint move hard even though the support may have a slightly raise the height of the rail ends.
Suspended joint: a rail joint coming between two railroad rail sleepers and some portion of rail is cantilevered at the joint. Just because the cantilever action, the joint becomes loose due to the hammering action of passing train loads. Suspended joints are commonly used on railway systems all over the world, especially in India.
Bridge joints: a rail joint which is similar to the suspended joint. Compared with the suspended joint, on either side of bridge joint are connected by means of a metal flat or a corrugated plate known as a bridge plate. This type of joint is not commonly used on Indian railway.
Rail joints can also be called one of the rail fasteners. While using the rail joints, some other fastenings is indispensable, such as fish bolt, rail nut and washer. Apart from bolts and nuts, other fastenings like rail clips, rail clamps, dog spikes, screw spikes and rail anchors are provided by AGICO Rail.
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The joint formed between two rails, which incidentally forms the weakest part of the track, is called the rail joint. Many fastenings are found to move this joint as much as efficiently as possible. Depending upon the position of the joint or sleeper, the types of rail joints are classified as follows :When a joint on one rail is exactly the opposite of a joint on another parallel rail, it is called a square joint. This type of rail joint is common in straight rails, but staggered joints are currently preferred.When a joint in one rail is exactly opposite the center of the parallel rail length, it is called a staggered joint.A rail joint located in the center of two consecutive sleepers is called a suspended rail joint. It is claimed that the load is evenly distributed over 2 sleepers, and when the joint is depressed, both rail ends are depressed. Therefore, they require more maintenance.When the sleeper is located exactly below the rail joint, it is called a support rail joint. This type of joint is not currently used. It is found from experience that the supported joint gives sufficient support with heavy axle load.This rail joint is similar to a suspended rail joint. But in this case, a section of metal is used as a bridge to connect the ends of the two rails so that there are no bending stresses in the rails. To rest the bridge on two sleepers they are not heading out. But an experiment has shown that this type of joint is not possible in actual practice so presently it is not favored.
That is, the coupling joint of two rails when the standard rail or non-standard rail is laid, and the splint and bolt are used to connect.
That is joints of different types of steel rails connected. To make the top surface of different rails and the inside of the head coincide, the corresponding special-shaped splint and special-shaped pad are used to connect. Special-shaped joints of positive line rails must use special-shaped rails.
a connector for conducting rail current or as a traction current loop, used in automatic blocking sections and electric traction sections. The inter-rail conduction coupling device is composed of two galvanized iron wires with a diameter of 5 mm, inserted into the round holes of the waist of the two rails - plug nail type, or welded into the steel sleeve at the head of the rail with a steel wire cable with a section of about 100 mm² - welding type.
It is also known as glued insulated rail joints. In the automatic blocking section, insulating joints are provided at the rail joints at both ends of the adjacent blocked section to ensure that the track circuit cannot pass from one blocked section to another blocked section. Generally, the insulated rail joint is to use a nylon rail header, nylon splint, and nylon bolt sleeve to separate the rail, splint, and bolt, so as to prevent the passage of current and play an insulating role.
The joints formed by rail welding by resistance welding, small gas pressure welding, or thermite welding are mostly used for seamless lines.
This joint is a frozen rail joint realized by increasing frictional resistance. Special crescent washers can be used to squeeze the bolt holes of ordinary rail joints. It is adopted that the rail joints should not be installed within the full length of the small bridge on the exposed bridge and within the temperature span of the steel beam with the rail expansion adjuster. The conditions for rail welding are not available. In the South of China, it is used to connect standard-length rails of ordinary lines into frozen long rail lines, which has received good results similar to welding long rail seamless lines.
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It is used to connect ordinary rails with a large amount of expansion at the end of the rail or rail joints with a temperature span greater than 100 meters. According to the different forms of structural planes, expansion joints can be divided into three types: oblique type, polyline type, and curve type.