Reaction kettle with visible internal mixed liquid

The utility model discloses a reaction kettle with a visible internal mixed liquid, which is characterized in that a jacket is arranged on the outer surface of a kettle body, an upper-end sleeve and a lower-end sleeve are arranged on one side of the lower part of the kettle body, the upper-end sleeve and the lower-end sleeve both penetrate through the jacket, and two ends of a U-shaped toughened glass tube are respectively inserted into the upper-end sleeve and the lower-end sleeve. A transverse plate is arranged on the outer surface of the clamping sleeve and located below the lower end sleeve, one end, away from the clamping sleeve, of the transverse plate is connected with a limiting plate through a hinge, and the inner side of the limiting plate is matched with the outer end of the U-shaped tempered glass pipe. The two ends of the U-shaped toughened glass tube are respectively connected with the upper end sleeve and the lower end sleeve in an inserting manner, so that a mixed solution in the kettle body c