Features and inspection points of flat top tower cranes
The flat top tower crane has a large operating space, and is mainly used for vertical and horizontal conveyance of materials and the installation of building components in building construction. The following introduces the characteristics and inspection points of flat top tower cranes, I hope to help everyone.
Features of flat top tower crane
The boom form of the flat top tower crane is divided into two types: horizontal type and pressure type. When the boom is horizontal, the load trolley runs along the horizontal boom to change the amplitude, and the movement of the amplitude is balanced. The boom is longer, but the weight of the boom is larger. When the boom is a pressure lever type, the luffing mechanism of the luffing mechanism tilts up and down, and the luffing motion is not as stable as the horizontal type, but its weight is small.
The lifting capacity of the flat top tower crane varies with the amplitude. The product of lifting capacity and amplitude is called the load moment and is the main technical parameter of this crane. Through the slewing mechanism and slewing support, the flat top tower crane has a large lifting height and a large inertial mass for slewing and walking. Therefore, it needs to have good speed regulation performance. The special lifting mechanism requires fast and light loads, The installation is slightly moved. In addition to resistance speed regulation, eddy current brakes, frequency modulation, pole changing, thyristor and electromechanical combination are often used.
Inspection points of flat top tower crane
1. Check the condition of the metal structure, especially the high-strength bolts. Its connecting surface should be clear of dust, paint, traces and rust, and use torque hands or special wrenches to tighten according to the requirements of assembly technology.
2. Check whether the bearing transmission of each mechanism, including the working transmission mechanism, is suitable for the bearing clearance, whether the gear meshes well, and whether the brake is sensitive.
3. Check the abrasion of the wire rope and the pulley, whether the anti-dropout device and the fixing of the rope end are reliable.
4. Check whether the electrical components are good, the degree of closure of the contact points, and whether the connection is correct and reliable.
5. Check whether the walking wheel is in good contact with the track and whether the rail clamp is reliable. Whether attachment bolts and clamping blocks are firm and reliable when installing attachment devices and internal climbing devices.
6. Whether lightning protection grounding is safe and reliable.
7. Whether the drainage of the base is smooth.
8. Whether the safety device is complete, sensitive and reliable.
The above is the introduction of the characteristics and inspection points of the flat top tower crane. I hope everyone will understand the characteristics and inspection points of the flat top tower crane, which will be helpful to everyone.
