High Safety Performance Of Chain Crane
There are many kinds of chain cranes, such as differential, turbo-worm, planetary cycloid and planetary cylindrical gear drive. A chain crane with more planetary gearing
Chain Crane also called the Immortal Gourd, Jin, Chain Hoist hand-pull gourd, is a simple, easy to carry manual lifting machinery, also known as "chain hoist" or "inverted chain." It is suitable for short distance lifting of small equipment and goods, the weight is generally not more than 100T. Hand-pull gourd shell material is high-quality alloy steel, rugged wear-resistant, high safety performance.
Chain Crane Lifting principle: Linked chain crane hanging at a certain height, bundled with the weight of the sling hanging on the hook, with the hand to pull the drive chain, so that the driving sprocket clockwise rotation, Chain Hoist due to the right screw thread of the connection drive sprocket can turn to the right side to move, so that the friction plate, ratchet, and brake discs are pressed against each other, so the drive shaft will rotate along with the driving sprocket, at which time the pawl is skidding on the ratchet tooth surface and does not play the role of braking; driving shaft drives the sun gear to rotate, Chain Hoist The planetary gears will rotate around their axes while circling the sun's gears, eventually driving the rotating arms and lifting sprockets to achieve the purpose of lifting weights. When the lifting is stopped, the pawl is automatically inserted into the ratchet immediately to prevent heavy objects from falling. In order to reduce the weight, only the reverse pull drive sprocket, the weight can gradually decline.
Hoisting, with the hook chain crane hanging at a certain height, bundled with the weight of the sling hanging on the hook, with the hand to pull the drive chain, Chain Hoist so that the driving sprocket clockwise rotation, because the right screw thread of the connection drive sprocket can be turned to the right side to move, so that the friction plate, ratchet, and brake disc three pressure each other, Chain Hoist so the drive shaft with the driving sprocket with the same direction, at this time the pawl on the ratchet gear surface skidding and do not play the role of braking; the drive shaft drives the sun gear to rotate, and the planetary gear rotates around its mandrel, At the same time around the sun gear revolution, and finally led the rotating arm and lifting sprocket rotation, Chain Hoist to lift the object of lifting. When the lifting is stopped, the pawl is automatically inserted into the ratchet immediately to prevent heavy objects from falling. In order to reduce the weight, only the reverse pull drive sprocket, the weight can gradually decline.
Chain Crane (hand pull gourd) Operating rules:
Inspection before hoisting
All parts must be intact, the transmission part and the hoisting chain lubrication good, empty operation normal; check hanger, hook, chain, axle, Chain Hoist sprocket and other components, such as found deformation, distortion, corrosion, crack, damage, transmission part of the inflexible, etc., strictly prohibited.
Use must not exceed its rated lifting capacity, hand-pull gourd shell should be rated tonnage markings. The temperature below $number shall not exceed half of its nominal weight.
It is not allowed to hang heavy objects with hook hooks;
Before lifting the upper and lower hooks to check whether hanging, lifting chain should be suspended vertically, lifting chain can not be twisted and knotted, Chain Hoist double row chain hand pull gourd of the lower hook components can not be flipped;
The hook should be in the weight center of gravity of the plumb, to prevent weight tilt, flip.
When using the hoist hanging point should be stable, solid and reliable, and can withstand the corresponding lifting weight, lifting when the hand pull gourd hanging on the building members, Chain Hoist must be the technical person responsible for the load calculation, to confirm that the safety of the operation.
The operation should first Test hanging, when using, first pour loose chain, hang good lifting object, slowly pull the traction chain, after the lifting chain force, the lifting chain should not be twisted, and then check the gear meshing and self-locking device working conditions, confirm the correct rear can continue lifting operation.
Pull the chain, the force should be uniform, and the direction of the sprocket, not inclined to pull, pull the chain only one person operation, Chain Hoist strictly prohibited two people above the pull. When used in various locations, the hand-pull chain should be kept in the rotating working plane of the sprocket, in case of removing the groove, pulling the chain should be forced evenly, not too fast too fierce, the file card chain, should be identified after the cause of treatment can continue to use; Chain Hoist When the weight is off the ground, such as normal operation, braking reliable, can continue to hoist;
The operator shall not stand on top of the heavy objects, nor shall the heavy lifting be suspended in the air while leaving the scene;
During hoisting, no one is allowed to walk or stay under heavy weights.
Do not use manual drive to lift weights. In the lifting process, regardless of the weight rise or fall, pull the chain, force should be evenly gentle, Chain Hoist do not force too hard, lest the hand chain beating or card ring. When the tension is found, it is not necessary to increase the tensile force, to immediately stop the use, check whether the heavy weights are related to other objects, whether the weight of weights exceeds the rated weight, the hoist parts have no damage and so on.
When the heavy load needs to stay in space for a long time, the small chain must be chained to the large chain; After the hoisting, after the safe landing of the heavy objects, can remove the hand pull gourd under the hook;