Simple powder quantitative material feeder

Abstract

The invention relates to the technical field of powder feeding device, in particular to a simple powder quantitative material feeder. The simple powder quantitative material feeder is provided with a valve body, wherein the valve body comprises a material inlet, a valve chamber and a material outlet; a first end cover and a second end cover are respectively fixed on two sides of the valve body; a main shaft valve core is supported on the first end cover and the second end cover in a rotatable manner; the cross section of a working section, which is located in the valve chamber, of the main shaft valve core is regularly prismatic, and a transitional arc section is formed between every two adjacent edges; each transitional arc section is in tiny clearance fit with the inner wall of the valve chamber; a material accommodating cavity is formed between each edge and the inner wall of the valve chamber; a material clearing device and a sweeping device are arranged at the material outlet; and when the main shaft valve core rotates, the material clearing device and the sweeping device clear away powder attached on all the edge surfaces of the working section of the main shaft valve core. The material feeder is simple in structure, quantitative and accurate, can clear away the powder attached on the walls of the material accommodating cavities and the main shaft valve core, and difficultly damages the surface of the main shaft valve core.

Description

technical field [0001] The invention relates to the technical field of powder feeding devices, in particular to a simple powder quantitative feeder. Background technique [0002] At present, most of the powder feeding devices on the market use the volume to quantify the powder and tiny particles and rely on their gravity to make the powder flow, mainly including rotary valves, rotary feeders, screw pumps, etc., because of their simple structure and size They are small and have the function of quantitative feeding, so they are widely used in powder feeding, but they all have a shortcoming that is difficult to overcome. The powder will adhere to the wall of the storage chamber, which will change the volume of the storage chamber and make the quantitative calculation inaccurate. , it will even block the filling cavity, and eventually the powder feeding device cannot discharge the material, so the filling cavity needs to be cleaned frequently, and the filling cavity is difficult...

AI Technical Summary

Problems solved by technology

[0002] At present, most powder feeding devices on the market use volume to quantify powder and tiny particles and rely on their gravity to make the powder flow, mainly including rotary valves, rotary feeders, screw pumps, etc., because of their simple structure and size They are small and have the function of quantitative feeding, so they are widely used in powder feeding, but they all have a shortcoming that is difficult to overcome. The powder will adhere to the wall of the storage chamber, which will change the volume of the storage chamber and make the quantitative calculation inaccurate. , it will even block the feeding chamber, and eventually the powder feeding device cannot discharge the material, so it is necessary to clean the feeding chamber frequently, and it is difficult to clean the feeding chamber, which limits the use of this type of powder feeding device, especially not suitable for some Working places with steam, high humidity, and powders that are prone to moisture absorption and adhesion

[0003] In the existing powder feeding devices, some of them use a rotating scraper to sweep the impeller or the main shaft valve core, but it is difficult for the scraper to sweep the uneven surface of the impeller or the main shaft valve core evenly, resulting in incomplete scraping , making the powder quantification inaccurate; powder adhesion is also likely to occur on the scraper, resulting in new inaccurate powder quantification factors

Furthermore, the use of a rotating scraper will complicate the structure of the powder feeding device, and the manufacturing cost will be high; in addition, the scraper will easily scratch the surface of the impeller or the spindle valve core, which will affect the service life of the powder feeding device

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