Sand classifying-conveying-dehydrating device

Abstract

The present invention provides a sand classifying-conveying-dehydrating device for continuously providing classified sand to a dehydration process, which enables to significantly improve a working efficiency and decrease a space for installing the device. To provide a sand classifying-conveying-dehydrating device for recovering sand from a material including water and sand, comprising: a classifier (100) for transferring the sand contained in the material from upstream to downstream; a dehydrator (300) for removing the water contained in the sand; and a conveyor (200) for delivering the sand from the classifier to the dehydrator, wherein the classifier, the conveyor and the dehydrator are integrally connected in sequence from upstream to downstream.

Description

[0001] cross reference [0002] This application claims the priority of Japanese Patent Application No. 2008-58590 filed on March 7, 2008 and Japanese Patent Application No. 2008-265649 filed on October 14, 2008. The entire contents are incorporated by reference in this application. technical field [0003] The invention relates to a gravel grading conveying dehydration device, which is used for continuously recovering dehydrated gravel from raw materials containing water and gravel. Background technique [0004] In general, a device for transferring only sand from a mixture of water and sand is known, for example: a classifier described in Japanese Examined Utility Model Application Publication No. 4-17236 . [0005] However, the classifier described in the above publication has high resistance to water flow when the helical blades rotate, so that the water surface in the sedimentation tank is strongly agitated by the rotation of the blades. This causes water containing ...

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Problems solved by technology

[0009] However, the device described in the aforementioned Publication No. 60-63460 only allows water to pass through small drainage holes

Therefore, it does not significantly reduce the resistance of the propeller to the water as it rotates

[0010] Therefore, even if the propeller described in Laid-Open Document No. 60-63460 is applied to the classifier described in Laid-Open Document No. 4-17236, it cannot solve the problems such as: from sedimentation due to high resistance to water flow. Tank overflow and reduction in processing efficiency

[0014] However, the known classifiers comprising the device proposed by the applicant need to take the classified sand out of the classifier once and transfer it to a dewatering machine located elsewhere for the dewatering process, which results in poor work efficiency

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