20 results about "Centrifugal pump" 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 device applicable to a pipe washing work of a deep sea oil and gas pipeline. The device comprises a water flushing system, a chemical agent filling system which is connected to the water flushing system, an assisting system which assists the water flushing system to clean the pipeline, and a data acquiring and transmitting system for acquiring and transmitting data of a pipe cleaning device, wherein the water flushing system comprises at least free water flushing and ROV supported water flushing; the free water flushing is that the inner and outer water pressure difference of a seawater pipeline is treated as power to flush water for cleaning the pipe; the ROV supported water flushing is that hydraulic power supplied by a centrifugal pump is used for flushing water to clean the pipe; the chemical agent filling system comprises at least an underwater chemical agent tank, a chemical agent discharging assembly, a chemical agent filling assembly, a chemical agent filtering and adjusting assembly and an underwater rapid chemical agent supplementing joint; and the chemical agent is filled with different concentration and mixing ratio through the chemical agent filling and adjusting assembly based on the flow rate change of a main pipeline. The device overcomes deep water pressure and resistance along the way and reduces the shortages of a large amount of aboveground devices for normal pipe cleaning work, large occupied space, and high input cost; and the deep water pipeline cleaning work efficiency is improved.

The invention discloses a fixed depth treatment device for seepage well filling material layer blockage suspensions. The device comprises an air bag, wherein a steel pipe covers the air bag; one end of the steel pipe is connected with a submersible pump through a back filling and back throwing converter; the other end of the steel pipe is connected with a centrifugal pump through a three-way valve; the centrifugal pump is connected with a water tank; an air inlet valve is arranged on an air bag; the air inlet valve communicates with an air pump; an air outlet valve is installed. The inventionalso discloses a method for treating the filling material layer blockage suspensions. The method comprises the following steps of putting a submerged pump, the back filling and back throwing converterand the air bag into a seepage well; putting the centrifugal pump into a water tank; inflating the air bag till the contact with the inner wall of the seepage well; then, filling water into the wellthrough the steel pipe; after the full filling, enabling the water flow to upwards move along the lower filtering material layer of the air bag; impacting out the blockage suspensions; then, deflatingthe air bags; opening a submerged pump for extracting out muddy water; after the extraction completion, taking out equipment; completing the dredging. The fixed depth treatment device for seepage well filling material layer blockage suspensions and the method provided by the invention realize the fixed depth unblocking of the seepage well filling material layer blockage suspensions; the treatmentprocess is efficient, convenient and fast.

The invention discloses a diesel-engine-driven self-priming pump and a control protection method, and belongs to the technical field of self-priming pumps. The problem that an existing traditional gasoline or diesel engine driven water pump lacks the protection measure is solved. A diesel engine, a vacuum suction device and a centrifugal pump are sequentially arranged on a base, a flywheel of thediesel engine is connected with one end of a transmission shaft of the vacuum suction device through a clutch, a thrust device is arranged on the clutch, the thrust device is used for driving the clutch, the other end of the transmission shaft of the vacuum suction device is connected with a pump shaft of the centrifugal pump, the centrifugal pump communicates with a water source through a pump inlet pipeline, a pressure chamber body is arranged on the vacuum suction device, and communicates with a suction chamber body through an air guide pipe, the suction chamber body communicates with the pump inlet pipeline, and an electric control cabinet is electrically connected with the diesel engine, the thrust device and the vacuum suction device. According to the diesel-engine-driven self-priming pump and the control protection method, the self-priming pump state can be automatically monitored, and the failure to the self-priming pump due to high temperature or low temperature can be avoided.

The invention relates to a multi-stage centrifugal pump axial force calculation method considering wear ring leakage, which solves the technical problem that the existing multi-stage centrifugal pump axial force calculation method cannot accurately calculate the axial force, and comprises the following steps of: calculating the axial force according to parameters such as the stage number N, the flow Q, the single-stage lift H, the rotating speed n, the impeller inlet diameter D1, the wear ring diameter Dm and the hub diameter Dh of a sectional multi-stage centrifugal pump; and the axial force FA borne by the pump is calculated by considering the wear ring leakage factor. The method is widely applied to the field of multi-stage centrifugal pump axial force calculation.

A centrifugal pump having a barrel casing and at least one stage casing therein includes a transition from the last stage casing to the pressure connector of the barrel casing in the form of a spiral flow space. The contour of the spiral flow space is formed by a contour of the last stage casing, a contour of a cover which closes the barrel casing on an end face, and an inner contour of the barrel casing.

The invention discloses equipment and method for guaranteeing decolorizing efficiency in the process of extracting salt from coking desulfurization waste solution. The equipment disclosed by the invention comprises a centrifugal pump, a preheater, a decolorizing tower, a basket filter and a decolorizing clear liquid storage tank, wherein the decolorizing tower adopts jacket type design, the condition that high-pressure liquid directly impacts activated carbon is avoided, a filter core and a filter path are processed into special shapes, the activated carbon of large granules in the decolorizing tower can be intercepted, and the repeated use of the activated carbon is realized; the activated carbon with fine granules can penetrate through the decolorizing tower, and a manner of filtration and treatment outside the tower is adopted. Through the adoption of the method disclosed by the invention, the occurrence of tower blockage can be avoided, the continuous production is realized, and the decolorizing efficiency is guaranteed.

A magnetically driven pipeline centrifugal pump, comprising a pump body, a pump cover, a pump shaft, an inner magnetic rotor assembly, an outer magnetic rotor assembly, and a motor, an outer magnetic rotor assembly is arranged above the inner magnetic rotor assembly, and the inner magnetic rotor assembly is arranged above the inner magnetic rotor assembly. A spacer sleeve is arranged between the magnetic rotor assembly and the outer magnetic rotor assembly, and the spacer sleeve is set on the outside of the inner magnetic rotor assembly and connected with the pump cover; the outer magnetic rotor assembly is arranged on the shaft head of the motor; the A sliding bearing body assembly is arranged below the inner magnetic rotor assembly through the thrust bearing assembly B, and the protrusion of the sliding bearing body assembly is connected and fixed to the pump cover. The invention is compact and reasonable, easy to install and maintain, and the installation method can be changed arbitrarily within 360° (vertical, horizontal, inclined at any angle) according to user requirements. The operation of the pump is stable and reliable, the service life is longer and the application range is wider.

The invention discloses a membrane oxygenator integrated with a centrifugal pump, the membrane oxygenator comprising a centrifugal pump system and a gas exchange device. The centrifugal pump system isfixedly arranged below the gas exchange device. The membrane oxygenator also comprises a blood inlet, a bleeding nozzle, an inlet nozzle and an exhaust nozzle. The membrane oxygenator integrated witha centrifugal pump provided by the invention is small in volume, convenient to carry and transport, and suitable for first aid, hospital operation and hospital transfer. The membrane oxygenator is convenient to connect and easy to use, is faster to operate, saves time, and allows users to start extracorporeal life therapy more quickly.

The invention relates to a vertical centrifugal pump impeller positioning device which relates to a centrifugal pump impeller positioning device. A pump shaft is provided with an impeller, an annular groove is arranged on the pump shaft at one side of the impeller and internally provided with a snap ring, the other side of the snap ring is provided with a shaft sleeve, a screw is arranged on the shaft sleeve, tightly fixes the shaft sleeve and the impeller together and clamps the shaft sleeve and the impeller on the snap ring. Because the annular groove is arranged on the pump shaft at one side of the impeller and internally provided with the snap ring, the other side of the snap ring is provided with the shaft sleeve, the screw is arranged on the shaft sleeve, tightly fixes the shaft sleeve and the impeller together and clamps the shaft sleeve and the impeller on the snap ring, all parts require low processing accuracy, are easy to process and have low manufacture cost, the impeller is not easy to drop and the normal use is not influenced, the vertical centrifugal pump impeller positioning device is suitable for positioning vertical centrifugal pump impellers.

The invention discloses a centrifugal pump with the variable impeller width. The centrifugal pump comprises a centrifugal pump body, an inlet sealing ring, an impeller mounting seat, connecting lug plates and a sealing sleeve. The inlet sealing ring is arranged in the centrifugal pump body. A water inlet is formed in the upper portion of the inlet sealing ring. The impeller mounting seat is arranged on the other side of the inlet sealing ring. A pump transmission shaft is mounted on one side of the impeller mounting seat. A flat key is arranged between the impeller mounting seat and the pump transmission shaft. A water outlet is formed in the top of the centrifugal pump body. The connecting lug plates are mounted on the two sides of the water outlet. An O-shaped sealing ring is mounted onone side of the pump transmission shaft. The sealing sleeve is mounted on one side of the O-shaped sealing ring. The centrifugal pump has the beneficial effects that by arranging a fixed impeller anda movable impeller, the width of the impellers can be adjusted according to the use situation, and using is convenient; and the flow and pressure of water in the centrifugal pump can be monitored in real time, and the centrifugal pump is prevented from being damaged due to overpressure.

The invention belongs to the technical field of nuclear power, and particularly discloses a hotspot backwash device applicable to instrument pipes of main pipelines of nuclear power stations. The hotspot backwash device comprises a hand trolley, a threading hose, a controller, a centrifugal pump and motor combination, a pressure transmitter, a pump water inlet stainless steel pipeline, a pump water outlet stainless steel pipeline, pump circulation stainless steel pipelines, a stainless steel pipeline, stainless steel instrument pipelines, stainless steel instrument pipe manual stop valves, a pump circulation stainless steel pipeline manual stop valve, pump water outlet port quick connectors, a pump water inlet port quick connector, a water fetching hose, a water outlet hose, a check valve,a tee, a water outlet hose quick connector, an instrument quick connector, a drain valve, a drain hose, a low-liquid-level float switch, a water tank manual stop valve, a water tank outlet port quickconnector and a water tank. The hotspot backwash device has the advantages that backwash can be simultaneously carried out on the four instrument pipes by the hotspot backwash device, and accordinglybackwash work can be efficiently accomplished by the hotspot backwash device.

The invention discloses a solid fluidization mining jet flow recovery flow field detection experiment device which comprises a slurry prefabricating module, a centrifugal pump with a liquid inlet communicated with a liquid outlet of the slurry prefabricating module through a pipeline, and a jet flow recovery module with a liquid inlet communicated with a liquid outlet of the centrifugal pump through a pipeline and integrally transparent. The overflow valve is simultaneously communicated with the jet flow recovery module and the slurry prefabricating module through pipelines and is used for relieving pressure, the front-end sampling port and the rear-end sampling port are communicated with a liquid inlet and a liquid outlet of the jet flow recovery module through pipelines and are used for sampling, and the flow field detection display module is used for detecting liquid in the jet flow recovery module; according to the scheme, under the simplified condition, the device is closer to the actual working condition of hydrate solid-state fluidization mining, detection of jet flow and a recovery flow field by all influence factors is achieved by replacing the nozzles and the recovery ports with different hole diameters, and the device has very high practical value and popularization value.

The invention discloses an acid pump vacuum suction apparatus which comprises a liquor storage pond, a closed container located above the liquor storage pond, a liquor suction pipe and a liquor outlet pipe arranged at the bottom of the closed container. The upper portion of the liquor suction pipe is located in an inner cavity in the closed container, the bottom of the liquor suction pipe is located in the liquor storage pond, a pipe opening of the liquor suction pipe is lower than the upper plane of the inner cavity, and the liquor outlet pipe is connected to a centrifugal pump. The closed container is filled with liquor until the liquor level in the inner cavity is flush with the upper pipe opening of the liquor suction pipe, the centrifugal pump is started, under the effect of the centrifugal force, a vacuum area is formed in the inner cavity through the centrifugal pump, and under the effect of the negative pressure, acid liquor in the liquor storage pond can be continuously pressed into the inner cavity of the closed container through the liquor suction pipe. When the centrifugal pump is stopped, liquor inside the liquor outlet pipe of the centrifugal pump flows back to the inner cavity under the effects of the gravity and the negative pressure, therefore, the liquor level inside the inner cavity is always kept at the position flush with the upper pipe opening of the liquor suction pipe, and accordingly when the centrifugal pump works next time, the pneumatic centrifugal pump can smoothly suck the acid liquor.