One of the more important parts of the screw conveyor is the screw blade. In the process of installing the screw conveyor, we need to install the screw blade and the inner pipe together. Generally speaking, the length of the screw conveyor is usually greater than 2 meters, but there are Sometimes in the process of operation, it will be found that the inner pipe penetrates into the inner hole of the spiral blade, and it is difficult to move forward when the length reaches 1 meter.
In this case, the first thing to consider is to measure the steel pipe. If the outer diameter of the steel pipe is consistent with the drawing, it means that the inner hole size of the continuous spiral blade is not enough, and it is a little smaller. For normal spiral blade installation, the inner hole of the continuous spiral blade is 1.5mm larger than the outer diameter of the steel pipe. The two-meter-long spiral can be easily inserted without leaving a large gap, which is convenient for the spiral blade and the pipe. welding.
When the continuous spiral blade is processed, the middle mandrel should be a pipe 2mm larger than the diameter of the pipe, and the continuous spiral blade will shrink slightly. After cooling, the inner hole of the spiral blade is exactly 1.5mm larger than the diameter of the pipe. about. Choose seamless steel pipe as the inner pipe, which can ensure that the roundness of the steel pipe can be easily penetrated into the spiral blade. A gap of about 1mm is reserved between the steel pipe and the inner hole of the spiral blade, and then the spiral blade is welded to the inner pipe by segment welding. superior.
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