4 results about "Propelling nozzle" patented technology

In one structural arrangement the fire fighting nozzle (18) is connected to the compressor (7) of a gas-turbine engine (4). In the second structural arrangement the fire nozzle (18) is connected to a screw compressor (50) connected to a diesel engine (47). Both types of fire extinguishing equipment have the same fire nozzle (18), whose mixing chamber (19) for the generation of a high-speed two-phase dispersive stream (21) of a bubble structure is made in the form of a block of mixers (35) with front and rear partitions (36,37), in between which pipe mixers (38) are located. Each mixer (38) is equipped with a confusor (43) and a diffusor (44). On the outlet from the fire nozzle (18) the high-speed dispersive stream (21) contains droplets of sizes 100-300 μm. The fire nozzle (18) has a mixing chamber (19), divided by partitions (36, 37) to a water supply chamber (40), air supply chamber (41) and dispersing chamber (39). The dispersing chamber (39) narrows into a gas-dynamic propelling nozzle (20), from which a high-speed dispersive stream (21) comes out. The fire nozzle (18) is connected to a rotating mechanism (22) which rotates it vertically and horizontally. The control unit (2) is equipped with a remote control (34) and connected to an generator (3).

The utility model relates to the technical field of shield tunnel engineering, in particular to an air bag driving shield tunneling machine rotating body moving system. The system comprises a receiving bracket and a rotating body moving assembly. A shield body is arranged on the receiving bracket; the rotating body moving assembly is connected with the receiving bracket and comprises a trundle bag, a propelling spray pipe, a first air compressor and a second air compressor. The plurality of trundle bags are uniformly distributed at the bottom of the receiving bracket; each trundle bag comprises a bag pressure chamber and a bag hollow chamber arranged on the periphery of the bag pressure chamber, and the bag pressure chamber and the bag hollow chamber are connected with the first air compressor through first pipelines. A plurality of air overflow holes facing the ground are uniformly formed in the bag hollow chamber; the multiple propelling spray pipes are arranged at the rear end of the receiving bracket in the moving direction. And each propelling spray pipe is connected with a second air compressor through a second pipeline. The device is high in construction efficiency, high in construction safety and low in cost.

The application discloses a jet flow type submarine cable maintenance robot, which comprises a shell, a float and a pressure pump arranged in the shell, the output ends of the pressure pump are connected with the input ends of propelling nozzles and dredging nozzles respectively, and the input end of the pressure pump is connected with the output end of a water suction pipe, wherein the output ends of the propelling nozzles are uniformly distributed on the upper and lower end faces of the shell and the outer circumferential side of the shell, the output end of at least one dredging nozzle is fixed on the outer side face of the shell, the input end of the water suction pipe is fixed outward on the upper end face of the shell, and the output ends of the propelling nozzles and the dredging nozzles are respectively provided with independent pressure regulating valves. The jet flow type submarine cable maintenance robot has the beneficial effects that the pressure pump and the corresponding pressure regulating valves are used for respectively driving the propelling nozzles and the dredging nozzles to spray water flow with controllable flow, the robot can be controlled to carry out vector propulsion and clean the cover on the surface of the submarine cable, irreversible damage to marine organisms and seabed geological environment can be avoided, and the submarine cable can not be damaged.

Propulsion nozzle for hypersonic vehicle