A method for estimating the hot air temperature of a setting machine using the heat of heat conduction oil as the heat source

Abstract

The invention discloses a hot air temperature estimating method of a setting machine using heat conductive oil heat as heat source; mechanism analysis and practical testing are combined so as to save certain temperature measuring nodes, thus relatively accurately obtaining hot air t2 value, reducing hardware cost of the setting machine, and providing strong technical supports for improving the setting machine quality.

Description

technical field [0001] The invention relates to the field of industrial automatic control, and relates to a heat exchanger modeling method of a heat setting machine. Background technique [0002] The shaping process in the printing and dyeing industry is to soak the gray cloth to be shaped in the trough with chemical materials, after being evenly pressed by the rolls, it enters the oven, and is dried and shaped under the action of high-temperature hot air. Shaping can improve the feel, slippage, color, width, strength and appearance of the fabric, and also stabilize the size. It is an indispensable process in the textile industry. [0003] The setting machine is a textile equipment with a large volume, a complex structure, and high energy consumption. It includes a feeding part, a weft straightener, a chain, an oven body, and cloth falling and rolling devices. The overall structure of the setting machine is complex. Taking the oven body as an example, it is generally compos...

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Problems solved by technology

[0005] At the present stage, in terms of temperature measurement of domestic setting machines, in addition to placing sensors in the heat transfer oil pipeline, temperature sensors are also arranged in the drying room of the setting machine, and the temperature of the drying room is used to approximate the temperature of the ground coming out of the nozzle, resulting in The large deviation caused the poor shaping effect of the actual product; secondly, due to the lack of understanding of the relationship between the heat transfer oil, air flow and temperature in the shaping machine, it is impossible to establish an effective mathematical model, and generally can only rely on The PID algorithm that is not sensitive to the model is used to adjust the flow rate of hot oil and the volume of hot air, which is difficult to control and difficult to set PID parameters. Therefore, two results are often produced: 1. Poor temperature control accuracy; 2. Low thermal energy utilization efficiency and high energy consumption

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