6 results about "Orifice plate" patented technology

The invention discloses a flushing device for a mechanical seal of a centrifugal pump, and belongs to the technical field of centrifugal pumps. The flushing device comprises a flushing pipe connected to the centrifugal pump; the liquid feeding end of the flushing pipe is connected with the outlet end of the centrifugal pump; the liquid discharging end of the flushing pipe is connected with the mechanical seal of the centrifugal pump; the flushing device is characterized in that the flushing pipe is connected with a tubular filter, a pressure gauge and a throttling orifice plate; the tubular filter is close to the outlet end of the centrifugal pump; the throttling orifice plate is close to the mechanical seal of the centrifugal pump; a first stop valve and a second stop valve are arranged on the flushing pipe; the first stop valve is positioned between the outlet end of the centrifugal pump and the tubular filter; and the second stop valve is positioned between the pressure gauge and the throttling orifice plate. The flushing device can both achieve a good cooling effect on the mechanical seal and prevent particle impurities from being deposited on the sealing surfaces of movable and fixed rings, thus effectively protecting the sealing surfaces of the movable and fixed rings, relieving wear and enhancing the sealing effect; and therefore, normal and stable operation of the centrifugal pump is guaranteed.

The invention discloses a nozzle flange capable of preventing foreign matters and a combustion chamber. The nozzle flange comprises a filter screen, a throttling orifice plate and a fixing part which are arranged in the interior of the nozzle flange, the filter screen is used for filtering the foreign matters entering the nozzle flange, the throttling orifice plate is arranged on the downstream of the filter screen and is coaxial with the filter screen, and the fixing part is used for carrying out compaction and fixation on the filter screen and the throttling orifice plate. According to the nozzle flange capable of preventing the foreign matters, a foreign matter preventing structure is arranged on the nozzle flange, the situation that the fuel jet flow is uneven due to the fact that a fuel spraying hole is blocked by the residual foreign matters is prevented, meanwhile, a throttling assembly is matched, the effective area of a fuel channel is adjusted, and the difference of the fuel flow among nozzles is reduced.

The invention discloses a non-condensable gas collecting and spraying energy-saving device of an evaporator set. The device comprises a water cooler, a vacuum pump, an evaporated water circulating system and a cooling tank, wherein pipe orifices are formed in the top end, the bottom end and the middle side walls of the cooling tank; an orifice plate is arranged above the pipe orifice in the middleside wall of the cooling tank and below the pipe orifice in the top end of the cooling tank; pipe orifices are formed in the top end, the bottom end and the upper side wall of the water cooler; the vacuum pump is connected with the pipe orifice in the middle side wall of a cylinder of the cooling tank and the pipe orifice in the top end of the water cooler through pipelines; pipelines for providing circulatory feeding water of the evaporated water circulating system are respectively connected with the pipe orifices in the side wall of the water cooler and the top end of the cooling tank; andtwo pipelines for receiving circulatory discharged water of the evaporated water circulating system are respectively connected with the pipe orifices in the bottom end of the water cooler and the topend of the cooling tank. According to the device, the cooling tank is additionally arranged, after the evaporator set operates stably, the vacuum effect generated by the cooling tank can replace the vacuum pump, and the vacuum pump stops running, so that the device has an energy-saving effect.