A dredging suction head with improved collection concentration and a method for preventing blockage and discharging residue

By designing a sludge removal and suction head with variable-pitch opposing spiral stirring blades and a primary screening filter, the problems of low collection concentration and easy clogging were solved, achieving efficient sludge removal and convenient slag discharge, and reducing transportation and post-processing costs.

CN115822017BActive Publication Date: 2026-06-09CHANGSHA RES INST OF MINING & METALLURGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGSHA RES INST OF MINING & METALLURGY CO LTD
Filing Date
2022-11-11
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing dredging equipment has low collection concentration and is prone to clogging, resulting in low dredging efficiency and increased transportation and post-processing costs. It also lacks convenient means of sludge removal.

Method used

Design a sludge suction head that includes a casing, an auger shaft, and a sludge pump suction pipe. It adopts variable pitch counter-rotating spiral mixing blades and a primary screen filter. The forward rotation increases the collection concentration, and the reverse rotation removes blockages. Combined with an open design and an auxiliary diversion pipe, it separates the mud and water for treatment.

Benefits of technology

The collection concentration was increased, the amount of mud and water treated was reduced, the post-treatment cost was decreased, and the slag discharge efficiency was improved by reversing to remove blockages.

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    Figure CN115822017B_ABST
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Abstract

The application discloses a dredging and sucking head for improving collection concentration, which comprises a cover shell, a stirring auger shaft and a sludge pump suction pipe, wherein the cover shell is connected with the sludge pump suction pipe in communication, and the communication part is a sludge suction port; the sludge suction port is located at the transverse middle part of the cover shell; the stirring auger shaft is hinged with the cover shell; the cover shell is semi-closed and is opened at the direction opposite to the sludge suction port; the stirring auger shaft is provided with opposite spiral stirring blades capable of conveying materials to the center when the stirring auger shaft rotates in the positive direction; and the pitch of the opposite spiral stirring blades gradually decreases from the two ends to the middle part. The method is performed by using the above device. The radius of the cover shell of the application gradually decreases from the end of the stirring auger shaft to the center, the extrusion effect on the materials is increased, the collection concentration of the center sludge suction port is improved, and when the dredging and sucking head encounters blockage, the stirring auger shaft can be controlled to reverse to discharge the sludge.
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