Dustless automatic accurate feeding system and dustless automatic accurate feeding method

Abstract

The invention belongs to the field of powder raw material processing and particularly discloses a dust-free automatic accurate feeding system and method. The dust-free automatic accurate feeding system comprises a vibration feeding device, a dust-free feeding device, a support and a control device, wherein the vibration feeding device comprises a vibration charging barrel, a vibrator, springs anda decrement weighing module; the vibration charging barrel is fixed on the vibrator, the vibrator is fixed on the decrement weighing module through the springs, and the decrement weighing module is placed on the support; the dust-free feeding device comprises a flexible connection, a flow control valve, a labyrinth sealing assembly, a hopper and an increment weighing module; the upper end of the flow control valve is fixed on the support and is connected to a discharge port of the vibration charging barrel through the flexible connection, while the lower end of the flow control valve is connected to the hopper through the labyrinth sealing assembly, and the hopper is placed on the increment weighing module; and the control device is connected to the vibrator, the decrement weighing module,the flow control valve, the labyrinth sealing assembly and the increment weighing module. The dust-free automatic accurate feeding system realizes automatic accurate feeding and solves the problems of static electricity and dust emission.

Description

technical field [0001] The invention belongs to the field of powder raw material processing, and more specifically relates to a dust-free automatic and precise feeding system and method, especially for automatic and precise feeding of energetic powders with poor fluidity. Background technique [0002] Due to the high risk of energetic powder, it is very easy to cause explosion due to friction, impact and static electricity during the feeding process, which will cause great harm to human life and property safety. Therefore, the friction and contact with the powder should be minimized during the production process. Squeeze to prevent static electricity; also control dust to reduce environmental pollution from powder; in addition, human-machine isolation must be carried out to realize automatic remote operation. The batching accuracy of the energetic material weighing batching system is an important measure of the feeding system, but due to the adhesion and cohesion between pow...

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Problems solved by technology

The spiral feeding speed is fast, the feeder is easy to manufacture, simple and convenient to install, and the feeding process is controllable. It is suitable for a variety of powders, including powders with poor fluidity. However, due to the instability of the filling coefficient, the stability of the feeding system is relatively low. In addition, when the screw device rotates, it is easy to form a large friction force and extrusion stress in the gap, thus causing a safety hazard

The electronic belt scale discharge device is equipped with an electronic belt scale under the silo. The material is fed from the silo to the belt scale. The powder in the heavy batching system is not stressed, and the belt is made of anti-static material, so it is relatively safe. However, in order to solve the dust problem, the belt is placed in a dust-proof cover, and the mechanism in the dust-proof cover is complicated, and there is still a lot of dust. This method is only suitable for places where the batching range is large and the precision is not very high.

Vibration conveying and discharging means that under the action of vibrating motor, electromagnetic or pneumatic, the vibrating feeder makes reciprocating motion to realize the throwing movement of powder; this method does not squeeze the powder and is safe, but it is not suitable for fluidity Powders that are easy to agglomerate have poor precision

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