How Do Cranes Conduct Safety Inspections?

How do Cranes Conduct Safety Inspections?
 

Metal Structure Safety Inspection
 

The main stressed components should be checked for overall or local instability, fatigue deformation, cracks, severe corrosion, etc. Whether the connections and welds of metal structures have obvious deformation and cracking. Bolts or riveted connections shall not have defects such as looseness and defects. Whether the high-strength bolt connection has sufficient preload. The overall anti-corrosion paint of the metal structure should be good.
 

Overload protection device inspection
 

Whether the overload protection device is sensitive and reliable, meets the design requirements, whether the opening pressure of the hydraulic overload protection device; whether the comprehensive error of the mechanical, electronic and comprehensive overload protector alarm, and cut off the power source set point meets the requirements.
 

Electrical Protection Safety Inspection
 

An easy-to-operate main isolating switch should be installed at the inlet of the crane, and an emergency power-off switch should be installed on the crane to check whether the main power supply can be cut off. Check whether the crane power supply and each mechanism are equipped with short circuit protection, voltage loss protection, zero position protection, overcurrent protection, and overspeed and loss of excitation protection for special cranes. Check the completeness and effectiveness of protection devices such as electrical interlocking, interlocking, and self-locking. Check whether the insulation resistance of electrical lines, the grounding resistance of electrical equipment, and the grounding resistance of metal structures meet the requirements. The normally dead metal shells of all electrical equipment on the crane, transformer cores and metal isolation layers, threading metal pipe grooves, cable metal sheaths, etc., and metal structures should have reliable grounding (zero) protection.
 

Cab Safety Inspection
 

The firmness and reliability of the suspension and support connection of the driver's cab should be checked. The door lock and door electrical interlock switch, insulating floor and dry powder fire extinguisher of the driver's cab should be fully equipped and effective. For cranes operating in harmful environments such as dust, poison, radiation, noise, high temperature, etc., it should be checked whether necessary protective devices to protect the driver's health are installed. The driver's cab lighting and inspection lights must use a safe voltage within 36V.
 

Safety Sign Check
 

Check the lifting capacity sign of the crane and whether the safety inspection pass mark of the technical supervision department is hung in an obvious place. Cart slides, sweeping rails, cable reels, spreaders, trolleys, rail clamps, slide guards, booms, crane balance arms, boom heads, outriggers, bridges with walkways Whether the outer side of the end frame of the type crane is sprayed with the color of the safety sign according to the requirements.