Before commencing the installation of a fixed-column jib crane, it is of utmost importance to carry out a meticulous inspection. Firstly, based on the packing list, carefully check whether there are any missing items or damages to the products and technical documents. During transportation, various issues might occur, such as the bending and torsional deformation of the jib crossbeam, the rusting of shafts, and impacts that could cause scratches. These problems should be addressed separately by carrying out appropriate corrections or restorations.
Moreover, on a regular basis, specifically every six months, it is necessary to clean and lubricate the rotating parts like shafts and bearings. This routine maintenance helps to ensure the smooth operation of these components during the crane’s service life. The cleaning process removes any accumulated dirt, debris, or contaminants that could potentially affect the performance of the parts. Lubrication, on the other hand, reduces friction between moving surfaces, minimizing wear and tear and enhancing the overall efficiency and longevity of the components.
When installing the column of the fixed-column jib crane, several key points need to be strictly adhered to. The column must be installed in such a way that it is perfectly perpendicular to the ground. This vertical alignment is crucial for the stability and proper functioning of the crane. To achieve this, the anchor plate screws should be tightened firmly without any looseness. Any looseness in these screws could lead to instability of the column, which in turn might cause the entire crane structure to be at risk during operation.
In addition, the floor and the foundation should have a good fit. If the crane is equipped with an electric hoist, the foundation should have pre-embedded cables and grounding facilities. The pre-embedded cables should be led out from the center of the foundation. It is essential to ensure that the grounding resistance does not exceed 4 ohms. A proper grounding system is vital for the safety of the crane and its operators, as it helps to prevent electrical shocks and protects the equipment from electrical surges and faults.
The installation of the crossbeam should be carried out in the following sequential steps:
Inserting the Rotating Shaft: Firstly, lift the crossbeam horizontally. Then, carefully insert the rotating shaft into the slewing drum through the upper and lower supporting plates. This step requires precision to ensure that the shaft is inserted smoothly and accurately, as any misalignment could affect the subsequent rotation and movement of the crossbeam. During this process, it is advisable to use appropriate lifting equipment and ensure that the crossbeam is held steadily to avoid any accidental drops or damages.
Installing the Reducer: Next, install the reducer on the supporting plate. The reducer plays a crucial role in adjusting the speed and torque of the crane’s movement. It is essential to follow the manufacturer’s instructions precisely during the installation process to ensure that the reducer is properly aligned and connected. Any improper installation of the reducer could lead to issues such as inefficient power transmission, excessive noise, and premature wear of the components.
Installing the Electric Hoist and Trolley: On the track of the jib crossbeam, install the electric hoist and the traveling trolley. It is of great importance to strictly follow the installation method described in the “Operation and Maintenance Manual” that comes with the chain electric hoist. This manual provides detailed guidelines on how to assemble and connect these components correctly, ensuring their safe and efficient operation. Incorrect installation could result in problems such as the hoist not functioning properly, the trolley getting stuck or derailed during movement, which could pose significant safety hazards.
Installing the Trolley Wire Rack and Wire Rope (or C-shaped Track): At the top of the crossbeam, install the trolley wire rack and the wire rope (or C-shaped track). If using a wire rope, it should be threaded through the pulley and tightened. In the case of a C-shaped track, there will be a self-made sliding trolley inside, and it should be on the same side as the electrical control box on the chain electric hoist. This alignment ensures proper electrical connection and smooth movement of the trolley along the track. During the installation of these components, attention should be paid to their proper positioning and secure fastening to prevent any loosening or displacement during operation.
Electrical Connection Installation: Connect all the electrical appliances on the crossbeam with wires and leave an appropriate length of power cord. The trolley wire pulley or the C-shaped track trolley and the cable should be separately bound and fixed with binding wires. This step ensures that the electrical connections are stable and reliable, preventing any electrical faults such as short circuits or loose connections that could disrupt the operation of the crane and pose safety risks.
Once all the above steps for the crossbeam installation have been completed, the overall hoisting of the crossbeam can be carried out. This final step should also be executed with caution, ensuring that the crossbeam is lifted evenly and steadily to its intended position without any collisions or damages to the surrounding structures or equipment.
In conclusion, the installation of a fixed-column jib crane is a complex process that requires strict attention to detail and adherence to the correct procedures. Each step, from the pre-installation inspection to the installation of the column and crossbeam, is crucial for the proper functioning, safety, and longevity of the crane. By following these precautions carefully, the crane can be installed successfully and operate smoothly in its intended working environment, providing efficient and reliable lifting services.
