Installation device for efficiency test of large impact type unit

The utility model provides a mounting device for efficiency testing of a large-scale impact type unit, which comprises measuring devices mounted on a high-pressure side pipeline and a low-pressure side pipeline, and the measuring devices are fixedly connected with the high-pressure side pipeline and the low-pressure side pipeline through flanges; a sliding installation body is arranged in a flange plate in the measuring device, a plurality of sensor installation holes are formed in the installation body, arc-shaped locking plates are arranged on the two sides of the installation body and fixedly clamped on the installation body through bolts, and the bottoms of the arc-shaped locking plates are fixed to the flange plate through bolts. And an L-shaped sealing ring is arranged among the arc-shaped locking plate, the mounting body and the flange plate. Sealing installation of the sensor can be guaranteed through the arc-shaped locking plate and the L-shaped sealing ring, meanwhile, the height of the installation