Fluidized bed bottom spraying coating device

Abstract

A fluidized bed bottom spraying coating device comprises a fluidized bed body with a hollow cavity, and the fluidized bed body comprises an upper body part and a lower body part; the upper body part is provided with pharmaceutical granules and coaxially and vertically provided with a flow guide cylinder; a flow guide cylinder lifting mechanism is arranged on the axial outer side of the flow guidecylinder, and the flow guide cylinder lifting mechanism is indirectly connected with a hand wheel through a rotating shaft; an air flow distribution plate is arranged below the bottom of the flow guide cylinder, an air flow hole communicated with the inner cavity of the flow guide cylinder is formed in the middle of the air flow distribution plate; the air flow distribution plate is connected withthe lower body part; a spray gun mounting base is arranged in the cavity of the lower body part, the top of the spray gun mounting base is connected with the air flow distribution plate; the lower body part is provided with a spray gun base, and a coating spray gun is arranged on the spray gun base; a pressing block is arranged on the air flow distribution plate; a conical center hole is formed in the pressing block, and an intercepting net is arranged on the bottom surface of the pressing block; a nozzle of the spray gun directly faces the conical center hole of the pressing block and protrudes out of the top surface of the intercepting net. By means of the coating device, online gun cleaning is achieved, and operation is convenient; the granules move spirally, the coating effect is good, the coating time is short, and the coating efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of solid preparations, relates to a fluidized bed coating equipment for pharmaceutical particles, and in particular relates to a fluidized bed bottom spray coating device. Background technique [0002] At present, for the bottom spray coating device for solid preparations, most of the winter coating devices are used, which mainly have two disadvantages: [0003] 1. The coating spray gun is fixed with the airflow distribution plate. When the gun is blocked, the equipment needs to be shut down, the pharmaceutical particles are poured out and then the gun is cleaned, which is quite troublesome to operate, and the coating effect cannot be guaranteed. [0004] 2. The pharmaceutical particles move in a bubbling state in the guide tube. Once the pharmaceutical particles enter the guide tube, the particles in the lower part will always be in the lower part of the guide tube. In this way, a long-term coating is requi...

AI Technical Summary

Problems solved by technology

[0003] 1. The coating spray gun and the air distribution plate are fixed. When the gun is blocked, the equipment needs to be shut down, and the pharmaceutical particles are poured out before cleaning the gun. The operation is quite troublesome and the coating effect cannot be guaranteed.

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