A slag scraping device for an aerated grit chamber

Abstract

The invention provides a slag scraping device of an aerated grit chamber. The slag scraping device comprises a scraping plate, a slag scraping arm, walking gears, a driving shaft, a driven shaft, a fixed chain, a driving shaft chute, and a driven shaft chute. The fixed chain, the driving shaft chute and the driven shaft chute are respectively installed at specific locations on a side wall above a slag scraping area so as to determine the movement track of a mobile component. Running of the walking gears on the fixed chain realizes reciprocating motion of a slag scraping mechanism in the slag scraping area and lift and fall of the driving shaft on the fixed chain. Change of the relative location between the driving shaft and the driven shaft realizes the action of scraping plate raising or insertion into water. The device provided by the invention realizes continuous slag scraping independent of joist barrow operation and motor elevated scraping plate, has no need for sensor control, is simple to operate, and is stable and efficient.

Description

technical field [0001] The invention relates to a pretreatment process section of sewage treatment, in particular to a slag scraping device for an aeration grit chamber. Background technique [0002] The aerated grit chamber is an important pretreatment unit in sewage treatment, mainly responsible for the task of sand removal and scum removal. However, there has been a lack of suitable slag scraping devices for a long time. [0003] The existing slag scraping device is generally installed on the truss car. When the girder truck moves to the water inlet, the sensor such as the limit switch detects the girder truck, the girder truck stops and the scraper is lowered by the motor. After that, the truss truck moves to the water outlet, and the scraper scrapes slag from the water inlet to the water outlet. When the girder truck moves to the water outlet, the corresponding sensor also detects the girder truck, the girder truck stops and the scraper is raised by the motor. The e...

AI Technical Summary

Problems solved by technology

[0004] However, such devices have a high failure rate in humid and dirty environments

And once it fails, it will be impossible to control the motor to lift and lower the scum scraper to remove the scum, and it may cause the derailment of the truss car, damage the cable, or even injure the staff, resulting in an accident

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