Blockage measuring device of blast furnace coal gun

The invention discloses a blockage measuring device of a blast furnace coal gun. The blockage measuring device comprises a coal dust branch pipe used for conveying coal dust to the coal gun; one end of the coal dust branch pipe is connected with the coal gun; the other end of the coal dust branch pipe is connected with a coal dust distributor; a cylindrical thermal resistor used for detecting temperature of the outer wall of the coal dust branch pipe is arranged on the outer wall of the coal dust branch pipe; the thermal resistor is fixed with the outer wall of the coal dust branch pipe through a hoop; the outer periphery of the coal dust branch pipe is sleeved with the hoop, and the thermal resistor is located in the hoop; the thermal resistor is parallel to the coal dust branch pipe andis tightly attached to the outer wall of the coal dust branch pipe; the thermal resistor is connected with a temperature measurement signal line; the temperature measurement signal line is further connected with a temperature