When the steel pipe is heated by high-frequency induction heating power supply, the principle of the rotary connector designed for it

When using high-frequency induction heating power to perform induction heating and tempering treatment on small-diameter (diameter less than 100mm) steel pipes, and when quenching and cooling the rotating steel pipes, blocking measures are taken to prevent water from entering the ends. Therefore, the steel pipe can only be heated and cooled through one pass. Since the presence of blockages in the end tube affects the heating effect, the temperature within a certain length of the end is lower than the heat treatment temperature. This section of low-temperature steel pipe must be removed, thereby reducing the yield. In order to ensure that the steel pipes are connected end to end, they are heated and quenched continuously while avoiding clogging of the ends to prevent water from entering. Our technicians carefully design and apply steel pipe end connectors in production, as shown in the picture below.

This simple connector consists of two plugs. The plug head is made of steel rods or steel pipes. The one on the left in the picture above is installed at the tail of the front steel pipe, and the one on the right is installed at the head of the rear steel pipe. When the two steel pipes are connected, it still keeps rotating and advances, and uses high-frequency induction heating power. When quenching, water will not enter the tube. In order to reduce friction, a small steel ball is welded to the tip of the convex plug to make point contact with the concave surface.

Production practice shows that when using high-frequency induction heating power to inductively heat and temper small-diameter steel pipes, when the steel pipe rotation speed is 200r/min, the front and rear steel pipes maintain synchronous rotation and advance smoothly. By using steel pipe ends with consistent performance as the pipe body, the yield rate can be effectively improved.