48results about How to "Improve ground breaking ability" patented technology

The invention provides diameter expanding equipment for a cast-in-place concrete pile, which comprises an outer sleeve component, an inner sleeve component, an outer sleeve component, an inner sleeve component and an outer sleeve component, the soil breaking structure is arranged on the lower end face of the outer sleeve component, a gap allowing concrete to pass through in the axial direction of the outer sleeve component is formed between the soil breaking structure and the outer sleeve component, and the soil breaking structure is of a structure with the wide upper portion and the narrow lower portion. The invention further provides a construction method of the cast-in-place concrete pile adopting the expanding equipment.

The invention provides diameter expanding equipment for a cast-in-place concrete pile. The diameter expanding equipment comprises an outer sleeve component, an inner sleeve component adapted to be mutually nested with outer sleeve component, and a soil breaking structure, the soil breaking structure is arranged on the lower end face of the outer sleeve component, a gap allowing concrete to pass through in the axial direction of the outer sleeve component is formed between the soil breaking structure and the outer sleeve component, and the soil breaking structure is of a structure with the wide upper portion and the narrow lower portion. The invention further provides a construction method of the cast-in-place concrete pile adopting the expanding equipment.

The invention relates to a wharf lower portion dredging device. The wharf lower portion dredging device comprises diesel oil driven equipment, two slurry pumps, a high-pressure water pump, a hydraulic pump, a conveying mechanism, a hoisting mechanism and a drag head assembly. The diesel oil driven equipment, the slurry pumps, the high-pressure water pump and the hydraulic pump are arranged on a working platform. The two slurry pumps are mounted on the rear side of the conveying mechanism. The front end of the working platform is connected with the conveying mechanism through a movable shaft. The working platform is provided with a front anchor gear, a rear anchor gear, a left anchor gear and a right anchor gear for fastening and fixing. A dredging construction method comprises the steps that firstly, equipment is mounted and debugged; secondly, the dredging device enters the construction area, and front splay anchors / cables and rear splay anchors / cables are fastened; thirdly, the dredging drag head assembly is extended into a preset coordinate point according to the tide level; fourthly, construction is conducted in a segmented and layered mode; and fifthly, after the drag head assembly is fallen, the drag head assembly is translated left and right by fastening or loosening the anchor cables, and the step is repeated to complete operation. According to the scheme, during operation, operators do not participate in operation on the wharf lower portion, and the whole implementation process is easy to operate, safe and reliable.

The invention relates to a powerful ground-breaking reamer for a dredger. The powerful ground-breaking reamer comprises a sealing plate, cutter arms, a reamer hub, a cutter ring, cutter teeth and a tooth holder, and is characterized in that a vertical distance between a lower edge of the cutter ring and the upper edge of the reamer hub is 1051 mm; the linear shape of the cutter arms is tapered, and the taper of the cutter arms is 4:5; the lower ends of the cutter arms extend to the inner side of the cutter ring, and the lower ends of the cutter arms and the inner side of the cutter ring are welded together; the diameter of the cutter ring is 1,860 mm; a ring-protecting and wear-resisting plate is welded on the outer edge of the cutter ring; the inner side structure of the cutter ring is that the upper part is narrower than the lower part; the envelope surface of the outer contour of the tooth top of each cutter tooth is close to the taper; and the powerful ground-breaking reamer comprises seven cutter teeth. Under the conditions that the total torque is not changed and a front end structure of a cutter suction dredger bridge is not changed, the acting force of the cutter teeth to soil mass is improved by means of reduction of reamer height, reduction of cutter ring diameter and change of the linear shape of the cutter arms and the like, so that the ground-breaking capacity of the reamer is improved. The powerful ground-breaking reamer for the dredger has the advantages that the structure is simple, the implementation is convenient, the digging force is improved remarkably, the construction efficiency is high and the like.

The invention provides a trailing suction dredger with a hob head driven by an external rotor motor. It includes: the hob harrow head, which is connected to the hull through the harrow arm, and the hob harrow head includes a harrow head fixed body, a harrow head movable cover, a drum equipped with harrow teeth, an external rotor motor, and a hydraulic device and high-pressure flushing elbow; the rake head fixed body is rotatably connected with the movable cover, and a high-pressure flushing elbow is installed above; the roller with rake teeth is installed under the movable cover, including the roller, tooth seat and rake teeth, and the roller is sealed There is an external rotor motor built into the ground, which drives the drum to rotate around the horizontal axis through the stator and rotor; the entire drum with rake teeth is rotatably connected to the movable cover of the rake head, and can rotate within a certain angle range with the movable cover relative to the fixed body of the rake head. The trailing suction dredger provided by the present invention can effectively control the weight of the rake head, reduce the axial restraint attachment, and increase the effective cutting width, thereby greatly improving the soil-breaking ability of the rake head of the dredger and the operation efficiency of dredging hard soil .