SANDBLASTING NOZZLE FOR IN-PIPE POLISHING

The present invention provides a sandblasting nozzle for in-pipe polishing, the sandblasting nozzle comprising: a nozzle body provided with a guide passage having an inlet and an outlet so as to discharge a spray material; a connection member provided on the nozzle body so as to be able to move back and forth in the same direction as the direction in which the spray material is discharged; and a spray control member provided on the connection member so as to be disposed at the outlet of the nozzle body and having a cross-sectional area that increases from the front to the rear in the direction in which the spray material is discharged. The spray control member is provided with at least one direct spray hole that passes therethrough in the same direction as the direction in which the spray material is discharged. La présente invention concerne une buse de sablage pour polissage intérieur de tuyau, la buse de sablage comprenant : un corps de buse pourvu d'un passage de guidage ayant une entrée et une sortie permettant d'expulser un matériau à pulvériser ; un élément de liaison disposé sur le corps de buse de façon à pouvoir se déplacer en va-et-vient dans la même direction que la direction de sortie du matériau à pulvériser ; et un élément de commande de pulvérisation disposé sur l'élément de liaison au niveau de la sortie du corps de buse et dont la surface de section transversale augmente de l'avant à l'arrière dans la direction de sortie du matériau à pulvériser. L'élément de commande de pulvérisation est pourvu d'au moins un trou de pulvérisation directe qui le traverse dans la même direction que la direction de sortie du matériau à pulvériser. 본 발명은, 분사체의 배출이 이루어지도록 입구와 출구를 가지는 가이드유로가 구비된 노즐본체, 분사체의 배출방향과 동일한 방향으로 전후이동 가능하게 노즐본체에 구비되는 연결부재, 노즐본체의 출구에 배치되도록 연결부재에 구비되고, 분사체의 배출방향을 기준으로 선측에서 후측으로 갈수록 단면적이 넓어지는 분사조절부재를 포함하고, 분사조절부재는 분사체의 배출방향과 동일한 방향으로 관통된 적어도 하나의 직분사공이 구비되는 관내 연마용 샌드블라스팅 노즐을 제공한다.