Continuous accurate powder weighing, metering and feeding system

Abstract

The invention provides a continuous accurate powder weighing, metering and feeding system which comprises a raw material bin, a pneumatic butterfly valve and a double-screw feeding device. The pneumatic butterfly valve is arranged on the lower portion of the raw material bin and connected with the double-screw feeding device through a rubber hose adapter. The system is characterized in that the raw material bin is installed on a steel frame platform through a buffering spring and a supporting column, a stirring paddle is arranged in the raw material bin and connected with a stirring motor, a powder fluidization device is arranged on the outer side wall of the lower portion of the raw material bin and comprises a support, the support is fixedly installed on the outer wall of the raw material bin, an air bag is installed on the support, an outlet of the air bag is connected with an electromagnetic pulse valve through a connecting pipe, the electromagnetic pulse valve is connected with astraight pipe, and the other end of the straight pipe is fixedly welded to an externally-connected base. The system carries out feeding stably and precisely, and has an excellent mechanical vibrationdisturbance resistant ability, feeding of materials achieves the purposes of accurate metering and stable feeding, and the relative error of continuous accurate powder weighing, metering and feeding is smaller than or equal to 0.1%.

Description

technical field [0001] The invention belongs to the technical field of machinery, and more specifically relates to a powder material continuous and accurate weighing metering feeding system. Background technique [0002] The disadvantages of the existing weighing feeder are: the matching is not perfect, and the user needs to provide the raw material bin and the pneumatic disc valve; when the pneumatic disc valve is opened, during the feeding process from the raw material bin to the weighing hopper, due to the powder material Poor fluidity will prolong the feeding process or interrupt the feeding process; when feeding, the material in the weighing hopper will have a "bridging" phenomenon, resulting in feeding discontinuity; poor anti-interference, the weighing hopper adopts a single or Supported by two load cells, once the mechanical vibration interferes, the weighing hopper will shake and seriously affect the measurement accuracy. Contents of the invention [0003] In vie...

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Problems solved by technology

[0002] The disadvantages of the existing weighing feeder are: the matching is not perfect, and the user needs to provide the raw material bin and the pneumatic disc valve; when the pneumatic disc valve is opened, during the feeding process from the raw material bin to the weighing hopper, due to the powder material Poor fluidity will prolong the feeding process or interrupt the feeding process; when feeding, the material in the weighing hopper will have a "bridging" phenomenon, resulting in feeding discontinuity; poor anti-interference, the weighing hopper adopts a single or Supported by two load cells, once the mechanical vibration interferes, the weighing hopper will shake and seriously affect the measurement accuracy

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