Jet type liquid impacting device with rolling centralizing belt

The utility model discloses a jet type liquid impacting device with a rolling centralizing belt. The device is connected with a drill bit, comprising an upper joint, an outer cylinder, a jet element, a piston cylinder, a piston, an impact hammer, an octagonal sleeve and a lower joint, wherein a plurality of centralizing belts are convexly formed at intervals in an eight-way sleeve body in the circumferential direction; one surface of each centralizing belt, in contact with a well wall is inwards sunken to axially form a plurality of roller grooves; a roller provided with a roller shaft is arranged in each roller groove and locally exposes from the roller groove; an inclined slope is formed in the part in which the top end of each centralizing belt is connected with the octagonal sleeve; a through hole is formed in each inclined slope; each roller shaft axially passes through the roller through the through hole in each inclined slope and is fixed onto each centralizing belt. The device is simple in structure; the large sliding frictional resistance generated by the centralizing belts in contact with the well wall during drilling is converted into small rolling frictional resistance between each centralizing belt and the well wall, so that the frictional resistance of the device to the well wall is reduced while the working stability of the drill bit is improved.