Blockage dredging device for U-shaped heat exchange tube of heater

The utility model discloses a blockage dredging device for a U-shaped heat exchange tube of a heater, which is used for dredging the blocked U-shaped heat exchange tube and improving the heat exchange efficiency of the U-shaped heat exchange tube. The device comprises a high-pressure water cleaning device, an outlet hydraulic hose, a control ball valve and a high-pressure thin pipe. One end of the outlet hydraulic hose is connected with a water outlet of the high-pressure water cleaning device; the other end of the outlet hydraulic hose is connected with one end of the control ball valve; the other end of the control ball valve is connected with one end of the high-pressure thin pipe; the other end of the high-pressure thin pipe is inserted into the U-shaped heat exchange pipe, and when the control ball valve is rapidly opened and closed, intermittent pulse high-pressure water flow is formed at the other end of the high-pressure thin pipe and used for impacting hard particles deposited in the U-shaped heat ex