What Is the Meaning of the Crane Remote Control Symbol?

Bridge cranes or portal cranes (including electric hoists) are widely used in the metallurgical industry, and there are two traditional control methods. One is to use the wired control method of the control cable, which is mostly used for hoist and eot-crane. The second is the cab control method, which is widely applicable to a variety of cranes. Professional crane operators must be trained to be familiar with the actual operation of the crane. The operation of the crane is inseparable from the role of the operator. Pendants are the operator’s connection to the crane. The crane is usually controlled by a wire handle, and when the handle is used, people must follow the crane to move. The wired handle control is not as convenient as a wireless remote control.

Remote Control Symbol for Crane

The button identification can come from the button or the label on the board.

The interlocking function in the control circuit is to ensure that the reverse rotation is not allowed during forward rotation, and the forward rotation is not allowed during reverse rotation. The limit switch is to ensure that the crane does not rush out of the stroke or derail. The crane circuit adopts a combination of the basic circuit starting, maintaining, and stopping circuits and the forward and reverse circuits.

The crane is controlled by a remote control, which requires a remote control transmitter and receiving controller to be used together. The remote control sends out a signal wirelessly, and the controller receives the signal for on-off output. There are complete drawings on the controller.

The signal transmission medium of the crane remote control is radio waves, and the radio wave carrier is used for remote control and command operation of remote equipment. After the transmitting command signal is received by the receiver, the contactor of the controlled mechanical equipment is driven to close or open through the relay close or open, so as to complete the required corresponding action. Typical manifestations include closing a circuit, moving the handle, turning on or off the motor, and then the mechanical equipment action arm exhibits the required action.

The driving operation is carried out by installing the control panel in the driver's cabin, and the operation buttons are installed on the control panel. The functions of the buttons are operated in the same place. The buttons are added with related equipment such as electric bell, lighting, electric fan, start, stop, key switch, indicator light and so on. The remote control is controlled by an 8-button double-speed button, and the remote control receiver is installed in the electrical control box. The signal is transmitted by the remote control transmitter, and the receiver receives the signal control method to drive the operation of the organization.

The remote control transformation of cranes is to install a set of remote control equipment without changing the operation mode of the original cranes. The two sets of operating equipment can be used as backups (selected by switches), which improves the reliability of driving to a certain extent. The transformation only needs to connect the corresponding contacts provided by the remote control in parallel with the contacts of the original vertical handle, cam controller or linkage table. The rotor resistance cutting device for the motor can be completed by the corresponding contactor provided by the remote control.