Main structure of high temperature overflow dyeing machine

Main cylinder: generally horizontal structure. The material is acid and alkali resistant stainless steel. There is a cloth storage tank inside, the cloth storage tank is lined with a smooth Teflon tube, and no dye liquor is stored in the tank. The friction coefficient of the PTFE pipe surface is low. At the same time, because the section of the storage tank is a variable diameter arc design. The orderly stacked rope fabrics can slide forward automatically by their own weight. So there is no tangling, jamming and knotting.

Dye liquor circulation system: It consists of the main circulation pump, related pipelines, control valves, etc. The dye liquor is forcedly circulated by the main circulating pump. The main pump motor is controlled by AC frequency conversion. To meet the needs of different dye solution circulation frequencies. During dyeing, a part of the dye bath is sprayed through the dye liquor nozzle. The gas-liquid two-phase mixing is carried out with the air overflow generated by the high-pressure fan. After further atomization through the overflow nozzle, it is sprayed to the fabric for exchange. The exchanged dye liquor is precipitated from the surface of the fabric fibers. After flowing from the gap between the polytetrafluoroethylene pipes of the storage tank to the filter at the bottom (also known as the liquid storage tank), the other part of the dyebath participates in the next cycle through a bypass. Directly transported to the filter for circulation so. The dye bath of the high temperature overflow dyeing machine is actually composed of two parts. That is, the dye bath that satisfies the hygroscopic swelling and exchange of fabric fibers and the dye bath that satisfies the main pump and pipeline circulation. The first part of the dye bath transfers the temperature of the cloth surface and makes the fabric color, and then flows to the filter after exchange. It takes a little longer from swapping to participating in the next cycle. The latter part of the dye bath directly returns to the filter. High cycle frequency. This part of the fast cycle of the dyebath. The temperature of the dye liquor and the concentration of dyestuffs can quickly reach uniformity.

Overflow circulation system: The high-speed overflow generated by the fan enters the nozzle system from the air duct to atomize the dye liquor through the nozzle system, and drives the fabric to run. The speed at which the fabric runs. It can be controlled by adjusting the air volume generated by the fan and the speed of the cloth lifting roller to match the dyeing of different fabrics. The air volume and cloth speed required by the process are not the same. Therefore, the design of the fan. The motor AC frequency conversion control is adopted to meet the needs of various fabrics with different gram weights. At the same time, the sealing of the transmission shaft is better, and the temperature rise of the bearing is lower. The operation should be smooth, with low noise and low vibration, which are related to the maintenance during design, manufacture, installation and use. The design of the overflow air duct should consider reducing the loss along the way and the balance of the air volume distribution of each pipe when the static balance is achieved. The filter air duct plays the role of preventing some fluff or other dirt from entering the overflow cycle during the fabric processing, and should have sufficient filtering area and flow area.

Nozzle system: Nozzle system is the key component of overflow dyeing machine. It is mainly composed of dye liquor nozzle, overflow nozzle, throat and nozzle shell. The material of the overflow nozzle is generally corrosion-resistant polytetrafluoroethylene. The first is to consider the convenience of disassembly and assembly. When the nozzles of different diameters need to be replaced according to the size of the fabric bundle, it is easy to disassemble and replace; the second is to have better sealing performance. Prevent leakage of dye liquor. If the sealing is not good, it will not only affect the effect of dye liquor atomization. Furthermore, there may be a difference in the dyeing of tubes due to the difference in leakage of each tube.