Combined type spray pipe of solid rocket engine

The invention provides a combined type nozzle of a solid rocket engine, and relates to the technical field of solid rocket engines. According to the combined type nozzle of the solid rocket engine,improvement is achieved on the basis of a conventional exhaust nozzle, a single-face expansion nozzle and a Laval nozzle are ingeniously combined, and the advantages of the two nozzles are exerted at the same time. In the combined type nozzle of the solid rocket engine, an asymmetric single-slope expansion nozzle is specifically adopted, the convergent section of the expansion nozzle is fixed and connected with the wall surface of a combustion chamber, and the expansion section is connected with a flexible joint to form a movable part capable of swinging within a certain angle, so that vector thrust within a larger range is generated, and vector control over the solid rocket engine is completed. In order to solve the problem of flow loss generated by the single-slope expansion nozzle, the Laval nozzle is arranged in