Connecting device for rotary-jet pump pitot tube assembly

The utility model provides a connecting device for a rotary-jet pump pitot tube assembly. One end of the part of a horizontal conduit of the pump pitot tube assembly located outside a rotor cavity far away from a rotor is in matched connection with a pump body through a lock nut and a key. According to the connecting device for the rotary-jet pump pitot tube assembly, the lock nut is provided with a threaded structure matched with the pitot tube assembly and locks the pitot tube assembly and the pump body; the pitot tube assembly is in key connection with the pump body to balance torque generated by acting force of liquid in the rotor cavity on a pitot tube when a rotary-jet pump works, a traditional scheme of fixing the pitot tube assembly and the pump body through bolts is replaced, the problem that the bolts are sheared off in a traditional fixing mode is solved, the pump use reliability is improved, and the manufacturing cost of the pump is reduced.