What do you mean by trumpet?

The bell mouth means: at the entrance of an object or street, there is a trend from big to small, which is called bell mouth.

For example, bell bottoms, there is a small alley in Beijing, which gets narrower and narrower as you go inside.

There is also a kind of bell mouth, which mainly appears in water supply and drainage specialty, such as water suction bell mouth. The diameter of the inlet is larger than the diameter of the pipeline, the shape of the bell mouth of the image point is similar to that of the big and small heads, and the smaller end is the same as the diameter of the pipeline.

For example, what is the bell mouth in drilling?

Generally, the bell mouth is a pipe vertically installed above the well sealer to the rotary table, and there is a hole in the middle to connect the overhead tank so that the mud can reach the vibrating screen.