Device and method for detecting mutation of valve flow capacity, and tobacco moisture regaining apparatus

Abstract

The invention relates to a device and a method for detecting mutation of valve flow capacity, and a tobacco moisture regaining apparatus. The method for detecting mutation of valve flow capacity comprises the following steps: detecting opening degree X and the flow rate Y of a valve; calculating the flow capacity of the valve Z=Y / X; according to the average value ZAVER of the current valve flow capacity ZREAL and the first N tests of the valve flow capacity ZAVER, calculate the change rate of the valve flow capacity P= | ZAVER-ZREAL | / ZAVER, where ZAVER= (Z1+Z2 + and the like + ZN) / N; comparing the change rate P of the flow capacity of the valve with the set value, and adopt the corresponding treatment strategy according to the comparison results. The invention can take corresponding measures when the change rate of the flow-through capacity changes suddenly, so as to facilitate operators to know the flow-through capacity of the valve in real time, solve the problem that the flow rateof the valve is uncontrollable due to slow travel action or leakage due to long-term use of the valve, and promptly remind operators to repair or replace the valve.

Description

technical field [0001] The invention relates to the technical field of cigarette processing control, in particular to a device and method for detecting a sudden change in the flow capacity of a valve, and a device for regaining moisture in tobacco. Background technique [0002] The loosening and moisture regaining process is an important process in the tobacco processing process. Tobacco leaves are sliced ​​in the upstream process to form laminar tobacco, and in the loosening and rehydrating process, the laminar tobacco is loosened into tobacco leaves in the drum. The process has certain requirements on the temperature of the drum, and the temperature of the drum must fluctuate within a certain range. Specifically, the temperature of the drum can fluctuate within the tolerance range by controlling the amount of steam applied. [0003] In the prior art, the control of the steam volume is usually adjusted through the control valve, but in the long-term use process, the contro...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the control of the steam volume is usually adjusted through the control valve, but in the long-term use process, the control valve will gradually age, and the stroke action will gradually appear unsmooth. At the same time, the corresponding valve opening will gradually increase until even if the valve opening reaches the maximum, it still cannot meet the steam flow requirement; moreover, the valve will still leak steam after long-term use. When the required steam flow is the same, The corresponding valve opening is reduced until, even though the valve opening has reached the minimum, there is still steam flow

After the above two phenomena occur, the valve needs to be repaired or replaced. However, the process of the sudden change of the flow capacity of the valve cannot be observed intuitively, so it is impossible to know the change of the flow capacity of the valve in time, which is not conducive to timely maintenance or replacement of the valve. , resulting in uncontrollable steam flow

Images