The role of bridge crane, and the matters needing attention when using
Bridge crane is the modern industrial production and lifting transportation realize mechanization, automation of production process in the important tools and equipment.So bridge crane in indoor and outdoor industrial and mining enterprises, steel chemical, railway transportation, ports and logistics departments and establishments are widely used. In addition, more attention should be paid to use the bridge crane is 1 each crane must hang rated lifting weight sign in obvious places. 2 work, bridge frame is not allowed to someone or use the hook carrier. 3 no operation certificate and drunk are not allowed to drive the crane. 4 must be focused in the operation, are not allowed to talk, smoking, or do not. 5 the car should be clean;Don't mess with equipment, tools, inflammable, explosive goods and dangerous goods. 6 cranes are not allowed to hypercharged use. 7 no lifting in the following circumstances: bind not firm;Overload the parts;The signal is unknown;Suspension;Buried or frozen items in the field;Suspended objects on someone;Without safety protection measures of inflammable, explosive and dangerous goods;A full liquid items;Do not conform to the requirements of the safe use of wire rope;Lifting mechanism is faulty. 8 crane in the absence of obstacles on a line running, hook or sling and material base, must be more than 2 m off the ground.If must over obstacles over obstacles, 0.5 m high. 9 for lifting objects smaller than 50% of the rated lifting weight, allow the two institutions action at the same time;More than 50% of the rated lifting weight objects, then only can one agency action. 10 has the main, secondary hook bridge crane, do not rise or fall at the same time, vice hook (special exception). 11 no welds on the lift objects or hammer and work under the object (supported). 12 must be after a power outage, and hung on the switch power assignment marks, just can do the inspection or maintenance work.When must live working, have security measures to protect, and is equipped with the specialist care. 13 don't literally throw things down from the car. 14 limit switch and interlock protection device, check regularly. 15 are not allowed to touch the limit switch as a way to stop. 16 when the hoist brake problems, are not allowed to lift heavy things. 17 and suspended objects are not allowed to run over the people or equipment. 18 for the portion of the crane, when welding the set to ground, not allowed to use a fuselage for ground.
19 down hook in the limit position, drum must keep a security ring was more than twice. 20 cranes are not allowed to collide with each other, more is not allowed to use a crane to promote another crane. 21 lifting heavy objects, liquid metal, explosive and dangerous goods, must first slowly lifting from the ground 100 ~ 200 mm, test the reliability of the brake. 22 repair and check with the floodlight, its voltage must be under 36 v. 23 bridge crane electrical equipment shell are connected to.Such as trolley track is not welded on the main girder, welding ground measures should be taken.Ground wire available cross-sectional area was greater than 75 was galvanized flat iron or 10 bare copper wire or greater than 30 was galvanized round steel.Cab or lifting the body of the grounding position should be more than two.Crane on any point to the power between the neutral point grounding resistance, both should be less than 4 Ω. 24 do safety technical inspection regularly, completes the engineering work.