Crane is a dangerous special equipment, its structure design, manufacturing and inspection have national standards, and rail fixed pressure plate has no design or standard specifications. Many crane safety accidents are caused by the fixed failure of rail plate. Therefore, it is hoped to provide a set of reasonable analysis method and design basis for rail platen by studying the force and stress distribution of rail platen.

Bridge crane to hook, track plate manufacturer grab or electromagnet to lift the object, through the bridge will be loaded to the wheel, through the wheel and track contact, so that the load borne by the track, track plate, supporting beam to the ground. The forces on the track are analyzed in three directions, namely, the longitudinal, transverse and vertical forces. When the crane is static, its track is only affected by its own weight, rated load and the position of the center of gravity of the truss. In the dynamic, it is affected by load lifting, starting and accelerating, wheel tread is not round, track tread is uneven, track joint fluctuation and so on, resulting in the impact and vibration of the crane.

The pressure plate is also called the protection connected, connected in series with the break point of the control loop of the relay protection device, used to connect or disconnect the control loop of the relay protection device, is the bridge and link between the protection device and the external connection, belonging to the important equipment in the secondary protection of the power system. Therefore, it is very important to collect and monitor the working state of the pressing plate. At present, the sensor is used to transmit the data to the pressing plate collector, and the pressing plate collector will upload the collected model to the controller through RS485 line, and the controller will be transmitted to the distance through the network.