Safety protection devices for gantry crane
In order to ensure the safety of single girder gantry crane operations, many users will install safety protection devices on it to protect or remind operators the safety. So what are the safety devices of gantry cranes?Let us have a look together.
Lifting limit device: When the hook of the travelling electric gantry crane rises to the specified height, it will touch the limit weight hammer, then the stroke switch will be turned on, the "overwinding" indicator lamp will be turned on, and the operation of lifting the hook and extending the boom will be cut off to ensure safety.
Leg locking device: In the case of high pressure hose, tubing rupture or cutting to the vertical cylinder of A-frame gantry crane leg, the two-way hydraulic lock in the hydraulic system can block the leg, block the pressure oil two cavities of the cylinder, and keep the leg from shrinking or throwing out to ensure the safety of the outdoor trackless gantry crane operation.
Lifting capacity indicator: mainly to enable operators to clearly point out the elevation angle of the boom and the rated lifting capacity allowed by the crane under the corresponding working conditions to ensure that the double girder truss gantry crane will not be overloaded
Boom telescopic safety device: Usually when the high pressure hose or tubing burst in the boom telescopic cylinder circuit of the gantry crane, the balance valve in the hydraulic circuit will lock the working oil from the lower cavity of the cylinder to make the hook Automatically retract to ensure the safety of heavy lifting gantry crane operation.
Through the above description, everyone must have a more comprehensive understanding of the safety device of the remote control gantry crane. Should you have any questions, please feel free to let us know.