The invention discloses a dynamic compactor and a combined top arm support structure thereof and belongs to the field of dynamic compactors The combined top arm support structure comprises a top arm section, wherein a forward-extended arm head device is arranged at the upper part of the top arm section and integrated with the top arm section; a fixed pulley set used for lifting a rammer is arranged at the front end of the forward-extended am head device; and a guiding pulley used for guiding the rammer is arranged at the rear end of the forward-extended arm head device Besides the combined top arm support structure, the invention also provides a dynamic compactor which comprises a trolley body, a bottom arm section of which the bottom is connected with the trolley body, a plurality of intermediate arm sections and a top arm support structure connected with the uppermost intermediate arm section, and the top arm support structure is the combined top arm support structure The advantages of balanced stress, high safety factor and production efficiency and reasonable structural design are achieved

Dynamic compactor and combined top arm support structure thereof

The invention provides a hydraulic slewing crane used for a ship. According to the hydraulic slewing crane used for the ship, the structure is simple, operation is convenient, the parking angle of a lifting arm can be changed according to the situation, the phenomena that a cockpit is shielded and a steel wire rope is drifted and disengaged from a groove are effectively avoided, the working efficiency and the using safety are improved, and good application and popularization value is achieved. The hydraulic slewing crane comprises a base. A turntable tower frame is installed on the base through a slewing bearing. The lifting arm is hinged to one side of the top of the turntable tower frame. A hydraulic winch is installed at the upper end of the lifting arm. A pulley device is installed at the head of the lifting arm. One end of the steel wire rope is connected with the hydraulic winch, and the other end of the steel wire rope penetrates through the pulley device and is connected with a lifting hook. A first fixing piece is arranged on one side of the lower portion of the turntable tower frame. A second fixing piece is arranged at the bottom of the lifting arm. An amplitude-change oil cylinder is installed between the first fixing piece and the second fixing piece. An angle indicator is arranged on the lateral portion of the lifting arm.

Hydraulic slewing crane used for ship

The utility model provides a marine hydraulic slewing crane. The marine hydraulic slewing crane is simple in structure, convenient to operate, capable of changing the parking angle of a suspension arm according to circumstances, effectively avoids the phenomena that a driver compartment is blocked and a steel wire rope deflects and is disengaged from a groove, improves working efficiency and using safety, and has the good using and popularization value. The marine hydraulic slewing crane comprises a base. A rotary table tower is installed on the base through a slewing bearing. The suspension arm is hinged to one side of the top of the rotary table tower. A hydraulic winch is installed at the upper end of the suspension arm. A tackle device is installed at the head of the suspension arm. One end of the steel wire rope is connected with the hydraulic winch, and the other end of the steel wire rope penetrates through the tackle device to be connected with a lifting hook. A first fixing piece is arranged on one side of the lower portion of the rotary table tower. A second fixing piece is arranged at the bottom of the suspension arm. A derricking cylinder is installed between the first fixing piece and the second fixing piece. An angle indicator is arranged at the side portion of the suspension arm.

Zhang Zhong

Papers

Marine hydraulic slewing crane