Cleaning, de-rusting and cutting automatic conversion all-in-one machine for offshore oil platform

The invention discloses a cleaning, de-rusting and cutting automatic conversion all-in-one machine for an offshore oil platform. The cleaning, de-rusting and cutting automatic conversion all-in-one machine for the offshore oil platform comprises a jewel orifice, a spraying gun handle, a high-pressure rubber pipe, a sand amount adjustment handle, a protective shield, an end cover, a pressure relief valve, a liquid inlet pressure gauge, a work pressure gauge, a pressure flow amount control valve, a pushing handle, a high-pressure liquid inlet pipe, a base, a trundle, a one-way valve, a balance water adjustment button, a mixing valve assembly, a supporting leg, an abrasive tank and other parts. After pressure water is subjected to pressure flow amount adjustment through the pressure flow amount control valve, the pressure water enters the mixing valve through the high-pressure liquid inlet pipe. Abrasives in the abrasive tank enter the mixing valve, are mixed with the water and then enter the jewel orifice through the high-pressure rubber pipe. The jewel orifice accelerates the mixed water and sprays the water on an object on the platform. The function of automatic conversion of cleaning, de-rusting and cutting is realized by adjusting the diameter of the jewel orifice.