Automatic alarm device for material blockage of three-product dense-medium cyclone

Abstract

The invention discloses an automatic alarm device for material blockage of a three-product dense-medium cyclone. The automatic alarm device comprises an ultrasonic liquid-level switch and audible and visual alarms, wherein the ultrasonic liquid-level switch is electrically connected with a time-delay relay control cabinet, a time-delay relay KT1 and a time-delay relay KT2 are arranged in the time-delay relay control cabinet, the time-delay relay KT1 is electrically connected with a high-liquid-level audible and visual alarm, the time-delay relay KT2 is electrically connected with a low-liquid-level audible and visual alarm, and the high-liquid-level audible and visual alarm and the low-liquid-level audible and visual alarm are electrically connected with a centralized control PLC (programmable logic controller). A high monitoring liquid level and a low monitoring liquid level are set in a middling coal aggregate box. The automatic alarm device has the advantages that high liquid level and low liquid level triggering signals of the ultrasonic liquid-level switch can be adjusted correspondingly according to coal quality change; alarming can indicate the conditions of a position where material blockage accidents occur, so that faults can be discovered timely, effective measures such as onsite machine halting or centralized-control automatic interlocking machine halting can be taken, accident extension is avoided, accident loss is reduced and production efficiency is improved.

Description

technical field [0001] The invention relates to a measuring device, in particular to an automatic alarm device for material blocking of a three-product dense medium cyclone. Background technique [0002] The three-product dense-medium cyclone is the main separation equipment commonly used in coal preparation plants. The three-product dense-medium cyclone is composed of a cylindrical first-stage cyclone and a cylindrical-conical second-stage cyclone in series. , mainly used for washing and processing of raw coal, with three discharge outlets for clean coal, medium coal and gangue, all of which are equipped with collecting boxes. Raw coal and dense medium suspension are fed into the first-stage cyclone, and after separation, clean coal products and heavy products are obtained; heavy products enter the second-stage cyclone, and medium coal and gangue are obtained after separation. The clean coal, medium coal and gangue obtained through separation are discharged from the corres...

AI Technical Summary

Problems solved by technology

[0005] Due to production needs, the design diameter of the first and second sections of the three-product dense medium cyclone is often small, and the passing capacity is limited. In addition, the impact of gangue and sundries in the selected raw coal leads to frequent material blocking accidents

At present, the coal preparation plant mainly relies on the observation and judgment of on-site workers and centralized control workers. The above-mentioned method is lagging behind in the discovery of material blocking accidents, which leads to the expansion of accidents and affects normal production.

Images