drum hoist การใช้

• The pile-up drum hoists are usually used in low load.
• Pile-up drum hoists can be mounted in many locations including ceiling, floor or wall mounting.
• Typical applications are to have a pile-up drum hoist with many pulleys to control a batten.
• Since the line is piled up on itself, this type of drum hoist provides a zero fleet angle solution.
• As the hoists are narrower than helically grooved drum hoists, these can be used in the places with limited space.
• This mine is serviced by an operational three compartment shaft with a double drum hoist that goes to below the surface.
• Moving drum hoists effectively eliminate the fleet angle between drum and block by shifting the drum along its axis as it spins.
• A dead-haul drum hoist uses the single drum to support all the lift lines running from the head block of a line set.
• The No . 5 shaft was started in 1904, and Shafts No . 1, 2, and 4 were equipped with Nordberg Conical Drum Hoists.
• As a result, fleet angles limit how close a dead-haul drum hoist can be mounted to the head block ( usually about 10 feet ).
• As a lift line coils and uncoils from the drum of a drum hoist, its " fleet angle " ( angle of a line between drum and sheave ) changes.
• With the fleet angle problem resolved, moving drum hoists can combine drum and head block into a single, relatively compact, unit for mounting to fly loft structure, with a corresponding reduction of installation cost.
• Some of the more frequently encountered hazards include falls from great heights; electrical hazards; hazards associated with hoisting personnel and equipment with base-mounted drum hoists; inclement weather; and structural collapse of towers.