Automatic temperature control apparatus and method in reeling silk production process

Abstract

The invention relates to a temperature automatic control device used in a filature producing process. The device comprises n technological temperature regulating circuits (n is more than or equal to 1 and is less than or equal to 32); and each technological temperature regulating circuit comprises a temperature measuring part, a temperature display and control part and an automatic regulating valve part; simultaneously, the device also comprises a steam pressure regulating circuit which consists of a pressure measuring part, a pressure display and control part and an automatic regulating valve part and is installed before each temperature regulating circuit; a temperature automatic control method by adopting the temperature automatic control device used in the filature producing process is that the pressure in a main pipe of a workshop steam inlet is regulated first by the steam pressure regulating circuit and temperature of technological temperature control points is automatically regulated by the temperature regulating circuit in a graded regulating way. The device and the method can continuously and precisely measure the technological temperature of working procedures and regulate throttle flow by a PID controller and the automatic regulating valve and realize continuous, stable and automatic control of the technological temperature of certain working procedure.

Description

Technical field: [0001] The invention relates to an automatic temperature control device and method, in particular to an automatic temperature control device and method for process temperature control points in the silk reeling production process. Background technique: [0002] In the production of silk reeling, many processes need to use steam as a heat source, such as steaming of raw cocoons, cocoon cooking, sowing, silk reeling soup, warm water mixing, silk drying, etc. Therefore, there are many temperature detection points and methods in the production process. control point. Especially cocoon boiling process and thread threading process are important links in silk reeling production, and the control of relevant temperature parameters in these processes is an important process control index. For example, the quality of cocoon cooking temperature control will directly affect the quality of raw cocoon cooking. If the temperature is too low or too high, the silkworm cocoon...

AI Technical Summary

Problems solved by technology

In the threading process, the temperature control of the soup in the threading pot has a very obvious impact on the threading effect. For example, when the temperature is too low, the threading efficiency will be low, and the threads will not be threaded, which will affect the subsequent silk reeling machine adding cocoons and threading , resulting in large denier deviation; when the temperature is too high, the sericin dissolves and loses a lot, which affects the silk quality, resulting in poor cohesion, large reeling and high consumption.

[0003] For example: at present, the main method used for the temperature control of the cocoon cooking machine and the temperature control of the soup in the Suoxu pot is: the worker manually switches the opening of the steam valve according to the indication of the thermometer pointer or judges by experience to cook the cocoon. Or cable temperature adjustment, this method has low measurement accuracy and high labor intensity for workers, and manual adjustment of the steam valve can not be done continuously to achieve temperature adjustment. Moreover, this method is too indirect, the effect is poor, and the temperature is difficult to grasp accurately. At the same time, due to frequent manual adjustments, the labor intensity of workers is increased; especially when the boiler steam supply fluctuates greatly or the production conditions change greatly, it is impossible to control the temperature within the range required by the process.

Some silk reeling factories have used solenoid valves to control the on-off of steam in order to achieve the purpose of controlling the temperature of cooking or threading. The "two-position" control of on-off (full-on or full-off) switch steam, because the steam is turned on and off, the temperature of the cooking chamber fluctuates up and down, so that when the cocoon cage passes through the cooking chamber, overcooked and overcooked cocoons appear instead In the case of unevenness; in the Suoxu process, due to the one-on and one-off of the heating loop steam, it is more difficult to control and stabilize the temperature of the Suoxu pot, followed by improper selection of temperature measurement points (usually designed on the outside of the Suoxu tank wall) The temperature value measured by the side of the overflow pipe) has a large lag and cannot reflect the soup temperature in the pot in time, so the control effect is poor. At present, most of the solenoid valve temperature control devices equipped with this type of solenoid valve are out of use.

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