Bag-piercing cutter and drum screen internally provided with bag-piercing cutter

Abstract

The invention relates to a novel bag-piercing cutter which is fixed in a drum screen for piercing bags during trash screen separation. The cross section of the bag-piercing cutter is encircled by two line segments and a curve segment which is tightly adhered to the inner side of the drum screen, a protrusion facing the inner side of the drum screen is formed at a joint of the two line segments, and two groups zigzag blades with a plurality of blade teeth facing to the center of a drum are arranged on one side. The invention also relates to the drum screen internally provided with the bag-piercing cutter. Four bag-piercing cutters uniformly arranged at one inner side of the drum screen along the circumference direction of the drum form a group, and at least two groups are arranged along theaxial direction; screen plates are also arranged on the cross section and one side of each bag-piercing cutter, and a steel sleeve is welded in each screen plate hole. The drum screen has high bag-piercing rate up to 95 percent and can prevent a trash bag from winding the bag-piercing cutter, trash in a pierced bag is screened by the screen plates, and the steel sleeves can prevent the trash bagfrom blocking the screen plate holes. The drum screen does not need to constantly stop to clean trash bags blocked on the screen plates and improves the screen separation efficiency and the screen separation precision of the drum screen.

Description

technical field [0001] The invention relates to the field of solid waste treatment, in particular to a bag breaking knife and a drum screen equipped with the bag breaking knife, which are used for bag breaking and screening of bagged garbage when treating garbage. Background technique [0002] The domestic garbage in most cities in our country is packed into plastic bags and thrown into trash bins. During transportation, small bags of garbage should be packed into large plastic bags for convenient transportation. There is no classification when collecting garbage. mixed with garbage. As a result, it is very difficult to sieve the garbage. In order to improve the screening efficiency, a bag-breaking knife is generally installed in the drum screen of the garbage screening equipment to break the garbage. The structure of the bag-breaking knife, Material selection, installation form, etc. will all have an impact on the bag breaking effect of garbage. At present, the bag-breaki...

AI Technical Summary

Problems solved by technology

[0003] The invention solves the problems of low bag-breaking rate and poor screening effect of the drum sieve, provides a bag-breaking knife and a drum sieve with the bag-breaking knife inside, improves the bag-breaking rate, can prevent garbage bags from being entangled in the drum sieve, and improves Improve the screening efficiency and screening accuracy of the drum screen, thereby improving the throughput of the entire waste treatment production line

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