(1) Overload protection device.
Whether the overload protection device is sensitive and reliable, meets the design requirements, the opening pressure of the hydraulic overload protection device; whether the mechanical, electronic and integrated overload protector alarms and cuts off the comprehensive error of the power source set point.
(2) Torque limiter.
The torque limiter is a safety device for the boom type crane to prevent overcharging. Check the sensitivity of the torque limiter by the amplification method or the weight gain method, and check whether the torque limiter alarm and the cut-off power supply set point comprehensive error are within the specified range.
(3) Limit position limiter.
Check the luffing mechanism of the lifting equipment, whether the lifting mechanism and the running mechanism can reach the set position distance, whether the alarm signal can occur, and automatically cut off the power source running in the dangerous direction.
(4) Windproof device.
For cranes with a hinge height of more than 50 m at the root of the boom, the anemometer should be inspected, and it can be accurately alarmed when the wind speed set point is reached or the working limit wind speed is reached. Cranes operating in orbit on the open track should check the components of the rail clamps, iron shoes and anchoring devices for deformation, defects and the reliability of their independent work. For the automatic rail clamp, the reliability of the windproof function and the electric interlock switch function in the non-anchored state should be checked for the sudden gust windproof device and the large vehicle running brake.
(5) Anti-rollover device.
For boom luffing and boom type cranes, the reliability of the anti-backward device should be checked, the sensitivity of the electrical interlock should be checked, and the indication accuracy of the luffing position and amplitude indicator should be checked.
(6) Buffer.
For different types of cranes with different lifting speeds and running speeds, check whether the configured buffers match and check the integrity of the buffer and whether it can touch the stop at both ends.
(7) Protective devices.
Check whether all kinds of protective covers, guardrails, guards, ladders, etc. on the crane are complete and reliable. Exposed on the crane may cause winding and wounding, open drive; couplings, sprocket, chain, transmission belt and other rotating parts Whether there is a protective cover, a pedestrian passage on the crane, a ladder and a fence that may cause the exposed parts of the personnel to meet the requirements. The electrical equipment for open-air cranes shall be equipped with a rain cover.
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