Design points of jib crane super lifting configuration
The operation process of the jib crane overlifting operation is simple and quick to install without a cylinder, but it requires more attention during use, and it is difficult to operate. The horizontal + vertical overhanging device has a complicated structure, high cost and time-consuming assembly. However, it is convenient to use, flexible to operate, and can realize stepless luffing of super-lifting counterweight. Horizontal cylinder type is simpler to install and lower cost than the former, but its performance is similar to that of non-cylinder type, only after the super-lifting counterweight is lifted off the ground. The vertical cylinder type super lifting device is relatively horizontal and vertical cylinder type with simple structure, low cost, almost assembling time, and is convenient to use.
Through the analysis of the operation process of the super-lift operation, the following points need to be done in the design process of the jib crane super-lift device:
(1) The fretting performance of the jib crane is better, and the stable speed of the single rope is not more than 2m / min;
(2) There is a limit to the main amplitude, and a force sensor can be installed on the rope or the main amplitude pull plate;
(3) The super lifting device with vertical oil cylinder needs to be equipped with a pressure sensor to detect whether the forces on the two pull plates are balanced, and the force conditions of the two are displayed on the display. The user can choose to operate the two oil cylinders synchronously or adjust them separately. ;
(4) The super mast needs to be installed with an angle sensor, and its value is used to calculate the amplitude of the super mast;
(5) If the horizontal oil cylinder type can be steplessly changed, a length sensor needs to be installed, otherwise a positioning pin can be used to ensure the width of the super-lifted counterweight at a determined range.
