Safety precautions for hoisting of the hottest cro

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Safety precautions for crane hoisting

(1) each crane must hang the nameplate of rated lifting capacity in an obvious place

(2) during the work, DuPont is not allowed to invest in new technology to improve the flexibility and stress cracking resistance of its Zytel brand resin on the bridge last year. Someone or use a hook to transport people

(3) do not drive a crane without an operation license or after drinking

(4) concentrate during operation, and do not talk, smoke or do irrelevant things

Wang Zhaoxing, vice chairman of the CBRC (5) the car should be clean; Equipment, tools, inflammables, explosives and dangerous goods are not allowed to be placed randomly

(6) the crane is not allowed to be overloaded

(7) lifting is not allowed under the following conditions: binding is not firm; Overload of parts; The signal is unknown; Diagonal tension; Objects buried or frozen in the ground; There is someone on the hoisted object; Inflammables, explosives and dangerous goods without safety protection measures; Overfilled liquid objects; The steel wire rope does not meet the requirements for safe use; The lifting mechanism is faulty

(8) when the crane is running on the line without obstacles, the hook or lifting appliance and the bottom surface of the lifting object must be more than 2m above the ground. If you cross the obstacle, it must exceed the obstacle by 0.5, with a year-on-year increase of 21.5% M

(9) for lifting objects less than 50% of the rated lifting weight, two mechanisms are allowed to act at the same time; Lifting objects larger than 50% of the rated lifting weight can only be operated by one mechanism

(10) for bridge cranes with main and auxiliary hooks, do not raise or lower the main and auxiliary hooks at the same time (special exception 2. Requirements for fixture materials)

(11) it is not allowed to weld or hammer on the lifted object and work under the object (when supported)

(12) inspection or maintenance work can only be carried out after power failure and when the sign of power failure operation is hung on the switch. If live work is necessary, safety measures must be taken to protect it, and special personnel shall be assigned to take care of it

(13) don't throw things casually from the car

(14) limit switches and interlock protection devices should be checked frequently

(15) it is not allowed to touch the limit switch as a parking method

(16) when there is a problem with the lifting brake, it is not allowed to lift heavy objects

(17) the hoisted object is not allowed to run over people or equipment

(18) when welding a part of the crane, the ground wire should be specially set, and it is not allowed to use the fuselage as the ground wire

(19) when the hook is at the lower limit position, more than two safety loops must be reserved on the drum

(20) cranes are not allowed to collide with each other, let alone use one crane to push another crane to work

(21) when lifting heavy objects, liquid metals, explosives and dangerous goods, you must first slowly lift them 100~200mm above the ground to test the reliability of the brake

(22) the voltage of the lamp used for repair and inspection must be below 36V

(23) all electrical equipment shells of the bridge crane shall be grounded. If the trolley track is not welded on the main beam, measures should be taken to weld the ground wire. The grounding wire can be galvanized flat iron with a cross-sectional area greater than 75mm2 or 10mm2 bare copper wire or galvanized round steel with a cross-sectional area greater than 30mm2. There should be more than two grounding positions in the cab or crane body. The grounding resistance from any point on the crane to the neutral point of the power supply shall be less than 4

(24) safety technical inspection should be done regularly, and pre inspection and pre repair work should be done well

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