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Сообщения, помеченные ‘Problem of cranes exploitation with dangerous defects’

18
Jan

Baranov V.A., Gorbunova L.N. Problem of cranes exploitation with dangerous defects

Problem of cranes exploitation with dangerous defects

Baranov V.A., Gorbunova L.N.

A great number of load-lifting cranes with expired standard service terms are being employed in Russia nowadays. The paper presents a number of defects detected in the expert surveys of load-lifting cranes. Among the most dangerous defects causing failures and accidents are the following: cracks in the welded joints and the base metal of supporting structures; extreme negative sagging of the flight structure of bridge-type cranes; the weakening of bolted joints connecting sections, towers, arrows and portals; excessive wear–out and wire drop-offs of cargo ropes; unreliable securing cargo ropes ends; maximum wear-out of hoisting mechanisms couplings and brake pulleys; weakness and lack of bolts supporting-rotary devices of truck cranes, pneumatic valves, caterpillar and tower cranes; reduced braking torque of hoisting mechanisms brakes, swivel brakes, flight change brakes, movement of cranes and carriages; full or partial absence of, or an undesirable operating state of anti-theft devices; inability or the fault of the limit switching mechanisms; the failure or lack of capacity constraints; lack of or inoperable anemometers; unsatisfactory condition of the crane ways; the absence or poor condition of the dead-end stops; the unsatisfactory condition of power cables insulation; inability of voltage light-signalling on main bridge cranes trolleys; inefficiency of sound alarm, etc. The paper presents the ways to reduce the amount of load-lifting cranes with dangerous defects, i. e. cranes operated in the warning state.

Keywords: load-lifting crane, dangerous defect, failure, accident.

References

  1. Who | the world organization of health http://www.who.int/ru/
  2. RD 10-112-96. Methodical instructions on inspection of load-lifting machines with expired service.

«Engineering industry and life safety» №2 (16), 2013. Pages: 41-48

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Baranov Vasiliy Anatoljevich – General Director of ITC «Sibkranservice», Krasnoyarsk, Russia. E-mail: info@sibkrans.ru

Gorbunova Lyubov Nikolaevna – Ph.D., Siberian Federal University, Krasnoyarsk, Russia. E-mail: Brigitta_81@mail.ru