The safety of the operation during the use of the dyeing machine

(1) Opening and closing the lid: When dyeing on any high temperature and high pressure dyeing machine is finished, the steam valve must be closed first to stop the heat energy. Then open the pressure-reducing valve, wait until the pressure drops to "O" megapoise (Mpa), and at the same time reduce the temperature in the dyeing machine to below 85 ℃, before opening the cover. Sometimes even under these conditions, if the cover still cannot be opened at will, it is often because the watch is out of order, and there may be residual pressure in the machine. At that time, you must calmly find the reason, and do not open the cover bluntly, as it may cause danger! In addition, although the fabric enters the machine, although it is running normally, if the temperature inside the machine has not reached 95 ℃, please do not close the pressure relief valve tightly, and try to let the air in the machine exhaust to the outside, especially the semi-filled dyeing machine, because the machine The saturated steam pressure inside is generally only when the temperature rises to a point above 99°C, so closing the exhaust valve too early will not only create a virtual pressure in the machine, resulting in light discoloration, but also easily cause foam, resulting in The "gas wave" generated in the circulating pump will cause abnormal phenomena such as knotting and blocking the cloth.

(2) Special attention should be paid to safe operation of the high temperature and high pressure overflow jet dyeing machine: such as the tempered glass observation window installed on the machine, when the dyeing temperature in the machine exceeds 100 ℃, it must not be used to scrub it with a damp cloth, because the glass is subjected to high Due to the effect of low temperature difference, intense thermal expansion and contraction will occur, resulting in cracking, which is very dangerous! In addition, after adjusting the liquor ratio of the water level glass tube, the stop valves at the upper and lower ends should be closed. Although these are small things, the major disasters I have witnessed are all caused by these small things, so I still have to be a A major event to remind everyone!

(3) Sampling problem: For fabrics dyed on a double-tube or multi-tube overflow jet machine, it is best to take a dyed sample on each tube to match the color of the standard sample. Under normal circumstances, the color of each tube should be consistent, but sometimes due to different cloth lengths in each tube, or abnormal circulation of the heat exchanger, or the filter is not cleaned for a long time, causing partial blockage, or high feeding concentration. Fast, etc. will cause the color difference between the tubes. Since the chromatic aberration is caused by these main factors, we must pay attention to whether these parts are normal or not in daily production, and solve the problem in time.

(4) Maintenance and repair: High temperature and high pressure dyeing machines, whether small prototypes or large production machines, the most important thing is the sealing ring (gasket). Practice has proved that the fabrics on the same processing list have the same pretreatment, sometimes why Will there be a cylinder difference? For a long time, I have felt that most of it is because of the difference in the sealing performance of each dyeing machine itself. Just as long as there is air leakage in one joint, it will not only affect the color difference, the size of the air leakage, and the dyeing, but also waste heat energy. Therefore, in addition to the problems mentioned in 2 and 4.1. above, it is very important to improve the sealing performance of the dyeing machine, and replace it in time when air leakage is found. In addition, if the safety valve, thermometer and pressure gauge are normal, please refer to the "Contrast Table of Temperature and Saturated Steam Pressure Constant". Don't use only one watch, that is, just look at the thermometer to 130 ℃, it is considered that there is 2kg/m2 (pressure), it is easy to cause accidents! Finally, the whole machine is overhauled and maintained once a year, the main components are maintained once every six months, the wearing parts are checked and maintained once a month, oil is added once a day, and daily cleaning work is done well, which can prolong the service life of the machine and ensure safe production. Improving the quality of each dyeing is closely related to avoid "small holes are not filled, big holes endure hardship", especially in the workshop management should be strengthened.