Do You Know The Application of Rotary Joint for Corrugated Cardboard Line

Selection and Application of Rotary Joints in Corrugated Cardboard Production Line

There are various types of rotary joints currently in use. But to summarize, there are only two types, one is heating and the other is cooling. In terms of circulation media, we generally divide them into three types: steam rotary joints, water rotary joints, and heat transfer oil rotary joints. If classified by usage environment and work requirements, it can be divided into high-speed rotary joints, high-pressure rotary joints, and high-temperature rotary joints.

The function of rotary joint is to connect the device between static and dynamic states. It is a converter that circulates the medium from the static pipeline to the dynamic container through rotary joint. It can also be to circulate the medium inside the dynamic container into the static pipeline. Simply put, a rotary joint is a connector. A seemingly simple accessory, but due to various factors such as different circulation media and usage environments, has created different types of rotary joints. Today, we will mainly talk about the practical application of rotary joints in cardboard production lines and the situations that need to be noted.

Rotary joints are mainly used in preheating cylinders and single-sided corrugated machines on cardboard production lines. The drying of cardboard after it comes out is done using a drying bed. So the rotary joints used on the cardboard production line are all in the front section. Some of the rotary joints on the preheating cylinder often do not rotate, which reduces the wear of the seals. However, due to the long-term non rotation of the preheating cylinder, it is easy to cause rust and impurities to settle on the sealing surface. When it needs to be rotated, impurities will be brought to the sealing surface, which is more likely to cause leakage. So, if the preheating cylinder does not need to be rotated for a long time, it is best to use a straight through joint without the need for seals inside, so as to avoid leakage problems. The disadvantage is that it cannot rotate.

The rotary joint installed on the corrugated machine also needs to consider the issue of vibration. Especially the rotating joint on the corrugated roller, it must be able to resist vibration. Many times, the leakage of corrugated machine rotary joints is caused by vibration. Some of the seals are not concentric due to vibration, and the curvature of the tube ball is not enough; Some are caused by seal cracking and impurities invading the sealing surface during vibration. At present, the cardboard production line uses rotary joints with spherical sealing structures. The cardboard production line imported from Taiwan also uses the same rotary joint, except that the connecting pipeline has been changed to a straight up and down connection, which eliminates the risk of pipeline leakage in the pipeline connection. Domestic spherical rotary joints are connected by configuring elbows at the drainage end, which increases the risk of pipeline leakage. The advantage is that there is no need to install pipes in a fixed position, and they can be adjusted from multiple angles.