Heat exchange roller with multi-layer built-in flow channels and working method thereof

Abstract

The invention discloses a heat exchange roller with multi-layer built-in flow channels. The heat exchange roller comprises a roller body; a liquid inlet and a liquid outlet are formed in the roller body; at least two flow channels are arranged in the roller body; the at least two flow channels are sequentially arranged from inside to outside; the at least two flow channels are communicated with each other to form a liquid channel from inside to outside; the flow channel on the innermost side is communicated with the liquid inlet; and the flow channel on the outermost side is communicated with the liquid outlet. On one hand, heat exchange liquid gradually flows towards the roller wall from inside, heat exchange between the heat exchange liquid and the roller body is gradually diffused towards the roller wall from inside, and the problem that the local temperature of a single-layer flow channel at a liquid inlet and a liquid outlet is too high or too low is solved. By means of the heat exchange liquid flowing mode, the width of a film product can be increased to be the same as the length of the roller body, and no edge needs to be reserved. On the other hand, heat exchange between the heat exchange liquid and the roller body is gradually diffused to the roller wall from inside, heat exchange between the roller wall and the heat exchange liquid is gentle, the temperature uniformity of all positions of the roller wall is good, and the quality of a film product is improved.

Description

technical field [0001] The invention relates to the technical field of heat exchange rollers, in particular to a heat exchange roller with a multi-layer built-in flow channel and a working method thereof. Background technique [0002] Heat exchange rolls are commonly used equipment in the production of film products. The interior of the existing heat exchange roller is a single-layer flow channel, and the heat exchange fluid enters from one end of the roller body and flows out from the other end. During the flow of the heat exchange fluid, it exchanges heat with the heat exchange roller to heat or cool the film product. However, this heat exchange roller has the problem of local overheating or supercooling. This is because when the heat exchange fluid enters from the liquid inlet, it is relatively hot or cold, which has a great heating or cooling effect on the liquid inlet, resulting in Too hot or too cold at the port and outlet. In actual production, it is often necessary...

AI Technical Summary

Problems solved by technology

However, this heat exchange roller has the problem of local overheating or supercooling. This is because when the heat exchange fluid enters from the liquid inlet, it is relatively hot or cold, which has a great heating or cooling effect on the liquid inlet, resulting in Too hot or too cold at the port and outlet

In actual production, it is often necessary to leave margins at both ends of the heat exchange roller, and the distance between the margins is about 200mm, so that the ends near the liqu

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