Non-return device used for marching type sintering machine trolley

The utility model discloses a non-return device used for a marching type sintering machine trolley, which uses an external engaging wheel tooth type ratchet wheel mechanism and regards the non-return device as one part of a steel rail. The device consists of a box body, a check pawl, a ratchet wheel, a moving wheel, a pawl shaft, a ratchet wheel shaft and the like. The box body is formed by an upper box body and a lower box body connected with each other; the ratchet wheel and the moving wheel are connected with the ratchet wheel shaft; the ratchet wheel shaft is arranged on the upper box body and the lower box body; and the two ends of the ratchet wheel shaft are supported by a bearing. Four circular arcs of the moving wheel are consistent with the circular arc of the wheel for ensuring that the wheel can successfully enter the moving wheel. The check pawl is arranged on the pawl shaft; adjusting shims are arranged on the axial mounting positions of the two sides of the check pawl; and the pawl shaft is fixe