The invention relates to a
grinding machine, in particular to a steel
pipe welding port
grinding machine. Therefore, the invention aims to solve the technical problem so as to provide the steel
pipe welding port
grinding machine which is uniform in grinding, fast in grinding speed and not easy to hurt people. The invention provides the technical scheme that the steel
pipe welding port grinding machine comprises a
handle, a button, an installation seat, an n-shaped frame, a motor, a small belt
pulley, a sliding block, an annular slide rail, an annular installation plate, a big belt
pulley, a flat belt, a male magic tape and the like, wherein a groove is formed in the top part of the
handle; the button is arranged in the groove; the installation seat is arranged on the right side of the
handle; the n-shaped frame is arranged in front of the right side of the installation seat; the motor is arranged in the middle of the top part of the n-shaped frame; and the button and the motor are connected through a circuit. According to the steel
pipe welding port grinding machine provided by the invention, the motor is used as a main power supply, so that the annular slide rail rotates to further enable a
sponge sand block to rotate so as to
grind a welding part; and an arc-shaped baffle plate can protect the flat belt, and a
brush can
brush fragments on the flat belt, so that the occurrenceof the phenomenon that the
friction force is too big to influence the rotation of the flat belt is avoided.