Tube core of tube bundle dryer with intermediate tubular shaft

Abstract

The invention provides a tube core of a tube bundle dryer with an intermediate tubular shaft, belonging to the mechanical equipment technical field. The tube core comprises seal heads, a tube sheet, a support plate, fixed shovel angle steel, a heat exchange tube, a steam inlet shaft and a steam outlet shaft, wherein, the steam inlet shaft and the steam outlet shaft are welded on the seal heads at two ends respectively and in steam communication with the heat exchange tube through the tube sheet; a central tubular shaft passes through the support plate and two ends of the shaft are respectively welded on the tube sheet; and the shaft heads of the steam inlet shaft and the steam outlet shaft are respectively inserted into the central tubular shaft and welded with the central tubular shaft into a whole. In the invention, by adding the central tubular shaft, the gravity applied to the middle part of the heat exchange tube is transferred onto the intermediate tubular shaft through the support plate, thus effectively reducing the drooping distance of the middle part of the heat exchange tube, reducing the alternating stress applied to the heat exchange tube during the rotation process of the tube core, and prolonging the service life of the tube bundle dryer.

Description

technical field [0001] The invention relates to a tube core of a GZG rotary tube bundle dryer, belonging to the technical field of mechanical equipment. Background technique [0002] GZG type rotary tube bundle dryer is widely used to dry corn by-products (germ, protein, fiber) and distiller's grains. Its working principle is that the motor drives the tube core to rotate through the reducer and gear, and the lifting plate installed on the periphery of the tube core copies the material. It rises to the top of the rotating tube bundle and falls between the heat exchange tubes. Since the high temperature steam is passed into the tubes, the tube wall is heated, and the heat exchange with the wet material is carried out through heat transfer and heat radiation, so that the water evaporates. The tube core is composed of a head, a tube plate, a support plate, a solid shovel angle steel, and a heat exchange tube. The steam inlet shaft and the steam outlet shaft are respectively weld...

AI Technical Summary

Problems solved by technology

Since the heat exchange tubes between the two tube sheets are placed horizontally, and the rigidity is very small, the heat exchange tubes will sag for a certain distance in the middle due to gravity, and at the same time, due to the continuous rotation of the tube core, the heat exchange tubes will collapse due to alternating stress Fatigue damage or even fracture occurs, seriously affecting the performance and life of the dryer

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