Method and device for automatically detecting powder material accumulation density

Abstract

The invention relates to a method and a device for automatically detecting powder material accumulation density, relating to a device for detecting powder (granular) material accumulation density. The method comprises the following steps of: (1) connecting a material dividing hopper with an original spiral conveyer pipe; (2) opening a material dividing valve at the lower part of the material dividing hopper so that materials fall to a material weighing hopper supported by a weighing sensor; (3) scraping stacks at the top of the material weighing hopper through a material pushing scraping plate driven by a material pushing cylinder; (4) transmitting weight information of the material weighing hopper to a PLC (programmable logic controller) control system for calculating, comparing and displaying by the weighing sensor; (5) opening a material discharging valve at the lower part of the material weighing hopper so that the materials fall to a material receiving hopper and enter to a secondary spiral conveyer; and (6) pushing the materials falling from the material receiving hopper to be combined with the materials falling from an original spiral conveyer material discharging tube and sending to next procedure together by the secondary spiral conveyer. The device disclosed by the invention has the advantages of automatic identifying function, high accuracy, fast speed and high efficiency; and the device is capable of realizing full check, and effectively controlling the product quality.

Description

Technical field: [0001] The invention relates to a detection device for bulk density of powdery (granule) materials, in particular to a method and a device for automatically detecting the bulk density of semi-finished expanded ammonium nitrate of expanded ammonium nitrate explosive. Background technique: [0002] Expanded ammonium nitrate explosive is a powdery industrial explosive with excellent performance. The expansion modification of ammonium nitrate is a key process in its production process. The indicators reflecting the quality of expanded ammonium nitrate include appearance, moisture, natural bulk density, oil absorption rate, etc. Among them, the natural bulk density is the index that can most directly reflect the quality of expanded ammonium nitrate. The expanded ammonium nitrate is discharged into the screw conveyor after being discharged from the crystallization tank, and sent to the next process by the screw conveyor and the feeding pipe. The lower half of the...

AI Technical Summary

Problems solved by technology

[0004] Manual sampling detection method takes a long time to detect, often a sample has not been tested yet, and other expanded ammonium nitrate in the tank has flowed into the next process; if it is waiting for the test result of the sample to be discharged into the next process, it will Affects production efficiency; due to the heavy workload of manual sampling and testing, sampling testing can only be adopted, and some other products in the tanks are selected for testing, accounting for about 20% of the total production tanks, resulting in a greater risk of quality control; in addition, manual sampling, excessive There is a lot of dust during sieving, and the operating environment for workers is harsh

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