478results about "Priming pump" patented technology

An aeronautical thruster of longitudinal axis has a hub, an annular row of unducted upstream rotor blades and an annular row of unducted downstream stator blades. Each downstream stator blade is of variable pitch, and at least one of the downstream stator blades is in a closed-pitch configuration relative to another of the downstream stator blades in that it has a pitch angle smaller than the pitch angle of the other downstream stator blade.

A blood pump with a stator and rotor wherein the rotor is assembled by bonding the stator components with epoxy. The bonding surfaces of the rotor components are primed with a silane-based primer to improve adhesion between the primer and the rotor components by rendering such surfaces hydrophobic. A bonding surface of one of the stator yoke or the stator sleeve, or both, is treated with a primer that improves wettability of the bonding surface and improves bonding of the epoxy to the binding surface. The device has a bonding surface adhered to epoxy in which a primer was applied on such bonding surface prior to introducing epoxy onto the bonding surface. In addition to improved bond strength, hydrophobic surface would control moister ingress.

An apparatus for an aircraft powerplant includes an impeller rotor and a seal runner. The impeller rotor includes a plurality of fluid circuits. Each of the fluid circuits includes a first outlet passage, a second outlet passage and an inlet passage fluidly coupled to the first outlet passage and the second outlet passage in parallel. The seal runner includes a bore, an inner guide surface and an outer land surface. The seal runner extends circumferentially about the axis and radially between the inner guide surface and the outer land surface. The bore is fluidly coupled to the first outlet passage of each fluid circuit. The inner guide surface forms a radial outer peripheral boundary of the bore. The inner guide surface radially diverges away from the axis as the inner guide surface extends axially away from the impeller rotor and to a distal end of the seal runner.

The invention relates to the technical field of self-sucking pumps, in particular to an efficient vacuum energy-saving self-sucking pump which comprises a base, a first pump cavity, a motor, a rain baffle, a first impeller, a compensation assembly and a drainage assembly, the first pump cavity, the motor and the rain baffle are sequentially installed at the upper end of the base, and the first impeller is installed at the axis position in the first pump cavity; the drainage assembly is installed at the lower end of the first impeller, and the two compensation assemblies are installed in the drainage assembly. After the drainage assembly is started, the drainage assembly is used for guiding the liquid level to overflow the first impeller and removing large-particle solids in fluid, and the compensation assembly drives the first impeller to move downwards to reduce the gap when detecting that the gap between the first impeller and the inner wall of the first pump cavity is enlarged. The tip end of the blade is easily and continuously washed by solid particles, so that the flow and lift of the core pump are reduced, and the efficiency is obviously reduced.

The invention relates to a vertical water-cooling self-priming pump, and belongs to the technical field of fluid conveying. Comprising an upper liquid storage cylinder and a lower liquid storage cylinder which are fixedly connected, a water inlet pipe is arranged on the rear side of the lower liquid storage cylinder, a discharge pipe is arranged on the front side of the lower liquid storage cylinder, a water outlet pipe is arranged on the front side of the upper liquid storage cylinder, and an exhaust valve is arranged at the top of the upper liquid storage cylinder; a water-cooled motor is fixedly arranged in the upper liquid storage cylinder, a multi-stage water pump is arranged in the lower liquid storage cylinder and connected with the water-cooled motor through a coupling assembly, and a supporting assembly is arranged between the water-cooled motor and the inner wall of the upper liquid storage cylinder; an overflow protection assembly is arranged at one end, away from the lower liquid storage cylinder, of the water inlet pipe; the problems that an existing self-priming pump is unstable in installation of a special-shaped motor, high in requirement for the environment of a cooling system, low in lift, unstable in long-time operation and liquid overflows when the self-priming pump is closed are solved.

The invention discloses an energy-saving air conditioner fan circulating water pump and a control method, and relates to the technical field of energy-saving household appliances, and the energy-saving air conditioner fan circulating water pump comprises a motor, a peristaltic pump shell, a peristaltic pump rotor and a centrifugal pump shell. The front end of the motor output shaft is connected with a fan; a plurality of extrusion wheels are arranged on the peripheral side of the peristaltic pump rotor, when the peristaltic pump rotor is in a first state, the extrusion wheels are matched with the peristaltic pump shell to extrude the elastic hose, the peristaltic pump rotor is in transmission connection with the output shaft, and when the peristaltic pump rotor is in a second state, the peristaltic pump rotor is separated from the output shaft; the extrusion wheel is separated from the elastic hose, the centrifugal pump shell is connected to the rear end of the peristaltic pump shell, an impeller is arranged in the centrifugal pump shell and connected to the rear end of the output shaft, the centrifugal pump shell is connected with a first water inlet pipe and a first water outlet pipe, and the first water outlet pipe is communicated with the water inlet end of the elastic hose. According to the centrifugal pump, one motor can be used for driving the fan and the impeller in the centrifugal pump shell, and energy consumption is reduced.

The invention discloses a self-suction type magnetic suspension pumping device which comprises a magnetic suspension pump, a self-suction pump and a controller, the magnetic suspension pump comprises a pump head and a magnetic suspension motor, the pump head is provided with a first inlet and a first outlet, the self-suction pump is provided with a second inlet and a second outlet, and the second inlet of the self-suction pump is connected with the first outlet of the magnetic suspension pump in series; the controller is configured to control the working states of the magnetic suspension pump and the self-priming pump, and the self-priming pump is configured to suck a medium in a pump head of the magnetic suspension pump to form negative pressure, so that to-be-conveyed fluid enters the pump head through the first inlet, and the magnetic suspension pump completes self-priming; after the magnetic suspension pump completes self-absorption, the output fluid is subjected to follow flow through the follow flow bypass; or after the magnetic suspension pump completes self-priming, the output fluid flows through the straight-through flow channel of the self-priming pump. According to the invention, the self-absorption function of the magnetic suspension pump is realized on the premise of not influencing the original performance of the magnetic suspension pump and not introducing particulate matter pollution or increasing shear force in the ultra-clean environment application of biological medicine or semiconductor manufacturing and the like.

The invention relates to the technical field of self-priming pumps, in particular to a horizontal self-priming pump which comprises a pump body, a wear-resisting plate, a flow guide component, a shaft and an impeller. The wear-resisting plate is arranged at an outlet of the liquid inlet runner; the flow guide component comprises a flow guide plate body and more than two arc-shaped guide vanes which are uniformly distributed in the circumferential direction of the flow guide plate body, the arc-shaped guide vanes are arranged in a staggered manner, a guide vane channel is formed between every two adjacent arc-shaped guide vanes, an inlet of each guide vane channel is communicated with the liquid inlet runner, and an outlet of each guide vane channel is communicated with the gas-liquid separation cavity; the shaft extends into the pump body and is connected with a driving device; the impeller is connected with the shaft, is arranged between the wear-resisting plate and the guide plate body and is located on the inner side of the arc-shaped guide vane, and the impeller rotates to lead fluid in the liquid inlet flow channel to the tip end of the impeller and send the fluid to the gas-liquid separation cavity through the guide vane channel. Gas-liquid mixtures can be discharged easily, vibration of the pump is reduced, the service life of the pump is prolonged, and noise is reduced.

The invention relates to the field of self-priming pumps, in particular to a centrifugal fan combined type self-priming energy-saving pump which comprises a servo motor, the output end of the servo motor is connected with a coupler, and a middle shaft is embedded in the end, away from the servo motor, of the coupler in a matched mode. The bearing frame is used for supporting the intermediate shaft, and the interior of the bearing frame is in extrusion fit with the intermediate shaft; the end, away from the coupler, of the middle shaft is fixedly connected with a rotating shaft. According to the centrifugal fan combined type self-suction energy-saving pump, liquid stored in the space defined by the fixed disc and the butt joint disc can be pushed into the pump body from the center of the fixed disc through the butt joint disc, the liquid can be sucked into the pump body through the butt joint disc, and the liquid can be sucked into the pump body through the butt joint disc. Therefore, the guide liquid can conveniently enter the pump body and can be automatically supplemented, preparation is made for starting of the pump next time, and the effect of manually supplementing water again is not needed.

The present invention relates to a method of starting a submersible pump used for transferring liquefied gas. The method includes starting a submersible pump (1A) disposed in a suction container (2A) of a pump apparatus (100A) to deliver liquefied gas to a suction container (2B) of a pump apparatus (100B) through a flow-path switching device (5A) in the suction container (2A), passing the liquefied gas through a flow-path switching device (5B) in the suction container (2B) while the liquefied gas bypasses a submersible pump (1B) disposed in the suction container (2B), and then starting the submersible pump (1B).

The invention relates to the technical field of vacuum water diversion, in particular to a vacuumizing node device capable of automatically controlling a water level and a using method of the vacuumizing node device. The water pump is connected to the water inlet pipe, is higher than the water inlet pipe and comprises a node tank, and the bottom of the node tank is connected with the water pump; one end of the exhaust pipeline is connected to the top of the node tank, the other end of the exhaust pipeline is connected to the vacuum pump unit, and an electromagnetic valve is arranged on the exhaust pipeline; the liquid level meter is connected with the control system, and the liquid level meter is used for detecting whether water in the node tank reaches the lowest water level and the highest water level or not and sending a detection signal to the control system, so that the control system judges whether the electromagnetic valve is opened or not to extract air in the node tank so as to raise the water level in the node tank. The node tank has the advantages that the lowest water level and the highest water level in the node tank are detected by arranging the liquid level meter, the water level is controlled between the lowest water level and the highest water level, the situation that a single liquid level meter is arranged, an electromagnetic valve is opened after the water level is slightly lowered, and air exhaust is conducted in the node tank is avoided, and frequent opening of the electromagnetic valve is avoided.

The invention provides a shield pump, and belongs to the technical field of water pumps. A shield pump comprises a motor shell, a pump body, a junction box and an exhaust pipe, a pump cavity communicated with the outside is formed in the pump body, a rotating shaft with an air passing channel is arranged in the motor shell, the rotating shaft is sleeved with a shielding sleeve fixed in the motor shell, a cavity communicated with the pump cavity is formed between the rotating shaft and the shielding sleeve, and the exhaust pipe is communicated with the cavity. The lower end of the exhaust pipe is inserted into the top of the shielding sleeve and is welded and positioned on the shielding sleeve, the junction box is detachably connected to the top of the motor shell, a positioning hole coaxial with the exhaust pipe is formed in the junction box, the upper end of the exhaust pipe is inserted and positioned in the positioning hole and is in sealed connection with the positioning hole through a sealing piece, and a deflation bolt is inserted into the top of the junction box; and the deflation bolt is screwed at the upper end of the exhaust pipe. Through welding of the exhaust pipe and the shielding sleeve and the positioning hole of the junction box, the exhaust pipe and the rotating shaft, the shield pump which is more stable in operation is provided.

The present invention discloses a cavitation elimination device and system for underground water pumps in coal mines, which does not require water filling and does not require a bottom valve. The device comprises a negative pressure water storage tank and a negative pressure water inlet pipe. The negative pressure water storage tank may optionally be provided with a water inlet at the top or bottom. The first end of the negative pressure water inlet pipe extends below the liquid level of the lower water tank, and the second end of the negative pressure water inlet pipe is connected to the water inlet. A water outlet is provided on one side of the lower end of the negative pressure water storage tank, and a liquid replenishment pipe and an exhaust pipe are provided on the top of the negative pressure water storage tank. The present invention places the water suction level of the water pump in advance, and the liquid level in the device is always higher than the water pump plane, thereby increasing the cavitation margin of the water pump device and reducing or eliminating the harm of cavitation to the water pump. Before the water pump is started, the cavity is always filled with liquid, and there is no need to fill it with water. The vacuum pump and jet pump can be omitted, and the control process is optimized. At the same time, the device eliminates the bottom valve, eliminating the safety hazards of the bottom valve being damaged and unable to fill it with water and the bottom valve maintenance process, thereby achieving the purpose of rapid start-up and safe operation of the water pump.

The utility model discloses an automatic liquid adding device of a self-priming pump, which comprises a self-priming pump body, the self-priming pump body is provided with a liquid inlet end and a liquid outlet end, the liquid inlet end is connected with a liquid inlet pipe, the liquid outlet end is connected with a liquid outlet tee joint, the other two connectors of the liquid outlet tee joint are respectively connected with a liquid outlet pipe and a liquid storage tank, the liquid outlet pipe is connected with a liquid supplementing branch pipe, and the liquid supplementing branch pipe is connected with a liquid supplementing pipeline. The other end of the liquid supplementing branch pipe is communicated with the liquid storage tank, and an electromagnetic valve is installed on the liquid supplementing branch pipe and is in linkage control with a metal electrode bar fixed to the top of the liquid storage tank. By the adoption of the device, automatic liquid supplementing can be achieved subsequently only by filling the pump shell with the solution when the self-priming pump is installed, the problem that the self-priming pump can work only by adding the solution into the liquid storage tank every time before being started is solved, and the working efficiency is improved.

The fire pump comprises a motor and a pump body, the pump body is in transmission connection with the motor, the manual-automatic integrated exhaust valve is installed at the position, close to the top of the pump body, of the pump body, and the manual-automatic integrated exhaust valve comprises an exhaust valve body, an exhaust connector, an exhaust pipe and an automatic exhaust mechanism. The bottom of the exhaust valve body is communicated with the pump body through an exhaust pipe, and the exhaust connector is installed on the top of the exhaust valve body and provided with an automatic exhaust hole leading to the exhaust valve body. The automatic exhaust mechanism is installed in the exhaust valve body and comprises a floating ball and a sealing valve rod which is distributed in the vertical direction and can move up and down, the floating ball is fixed to the lower end of the sealing valve rod, a conical plug part is arranged on the sealing valve rod, and the conical plug part is used for blocking the automatic exhaust hole under the acting force of the floating ball when the water level in the exhaust valve body rises. According to the utility model, the exhaust effect can be obviously improved, the operation of the fire pump is more stable, and the working efficiency and the performance are greatly improved.

The present invention discloses a centrifugal pump structure with a self-priming valve, which aims to solve the problem that the outlet direction of the water flow during the operation of the centrifugal pump self-priming valve is set irrationally, thereby affecting the performance of the water pump. The invention includes a pump body, wherein a water inlet chamber and an impeller chamber are provided in the pump body, an impeller is installed in the impeller chamber, and the impeller is provided with a water inlet connected to the water inlet chamber. A reflux chamber is provided in the pump body, and a reflux channel is provided between the reflux chamber and the water inlet chamber. An integrated self-priming valve assembly is installed at the reflux channel, and the outlet of the reflux channel is set biased towards the water inlet. The self-priming valve on the centrifugal pump of the present application forms an integrated module, which is convenient for assembly with the centrifugal pump and can be adapted to different models of water pumps; the outlet of the self-priming valve is biased towards the water inlet direction of the impeller, thereby avoiding the obstruction of the water flow of the centrifugal pump by self-priming reflux, thereby ensuring the performance of the water pump.

The invention relates to the technical field of self-priming pumps, in particular to a self-priming pump and a control method thereof.The self-priming pump comprises a pump body, a liquid storage cavity is formed in the pump body; the controller is arranged on the pump body; the liquid level sensing assembly is arranged in the liquid storage cavity and connected with the controller, and the liquid level sensing assembly is used for detecting the real-time liquid level height in the liquid storage cavity, generating a signal and transmitting the signal to the controller; the air exhaust assembly comprises a vacuum pump and a channel which are arranged on the outer side of the liquid storage cavity, and the vacuum pump is connected with the controller; one end of the channel is communicated with the liquid storage cavity, and the other end is connected with the vacuum pump; after the power supply is switched on, if the liquid level height in the liquid storage cavity is lower than a first preset height, the liquid level sensing assembly generates a first signal and transmits the first signal to the controller, and the controller controls the vacuum pump to start working. The vacuum pump is adopted for pumping air, and the self-suction speed is greatly increased.

The utility model discloses a condensed water delivery device for an underground condensed water tank, which relates to the technical field of condensed water delivery equipment and comprises a condensed water delivery buffer tank, a cooling coil is arranged at the bottom in the condensed water delivery buffer tank, and the bottom of the condensed water delivery buffer tank is communicated with a water inlet of a delivery pump through a connecting pipeline; the outer wall of the condensed water delivery buffer tank is communicated with a condensed water tank through a right-angle bent pipe; a water filling opening pipe is arranged at the top of the condensed water delivery buffer tank and is communicated with an outlet pipe, and the outlet pipe is arranged on a water outlet of the delivery pump. According to the utility model, the condensed water delivery buffer tank provided with the cooling coil pipe is additionally arranged at the inlet of the delivery pump and is used for cooling the delivered condensed water and providing sufficient condensed water for the inlet of the delivery pump, so that the pumping-out and cavitation phenomena of the delivery pump are avoided, and the service life of the delivery pump is effectively protected.

The utility model belongs to the technical field of water supply, and particularly relates to a remote control vacuum pump exhaust device and system, which comprises a vacuum pump, a vacuum pump control box, a main exhaust pipeline and an electromagnetic valve, the electromagnetic valve is arranged on a main exhaust pipeline, the control end of the electromagnetic valve is connected with the vacuum pump control box, a starting button and a stopping button are arranged on the vacuum pump control box and used for inputting a starting signal and a stopping signal of the vacuum pump, and the output end of the vacuum pump control box is connected with the control end of the electromagnetic valve. Remote starting and stopping of the vacuum pump exhaust device can be achieved, and the starting efficiency of the centrifugal pump is greatly improved.

A submerged water feeding pump with a water retention function comprises a motor, a base, a pump outer pipe, an inner pipe, a guide vane, a pump shaft, an impeller and a guide bearing, a sealing shaft sleeve and a valve clack are respectively sleeved on the pump shaft and above the impeller from bottom to top, the sealing shaft sleeve is axially and fixedly mounted on the pump shaft, and the valve clack is not in contact with the pump shaft and can axially move along the pump shaft. A first sealing face capable of being in contact with each other is arranged between the sealing shaft sleeve and the valve clack, a second sealing face capable of being in contact with each other is arranged between the valve clack and the guide vane, when the valve clack is reversely pressed, the first sealing face and the second sealing face are both in a sealing state, the first sealing face or the second sealing face is in elastic sealing, and valve closing is achieved. When the valve clack is pressed in the forward direction, the first sealing face and the second sealing face are both in an open state, and valve opening is achieved. Therefore, the pump cavity of the water feeding pump can be kept full of water during shutdown, and the water feeding pump and the main drainage pump connected with the water feeding pump can be started at the same time during restarting, so that the purpose of quick starting is achieved.

The invention discloses a water pump starting device, a quick-start water pump and a water pump starting method.The water pump starting device comprises a side valve body, a side valve clack, a guide rod, a spring, a bayonet lock, a fluid passing body, a main valve clack and a pin shaft, the side valve clack is connected with the guide rod and can be in sealing fit with the side valve body under the action of the spring, and the side valve clack is connected with the guide rod; the guide rod is in sliding fit with the side valve body and the fluid passing body, the bayonet lock is matched with a guide hole in the guide rod to limit or release the main valve clack, the main valve clack is rotationally connected with the fluid passing body through a pin shaft and is in linkage with the side valve clack under the action of water supply pressure, and therefore water path switching in the pump starting process is completed. The device is compact in structure and easy and convenient to operate, automation can be achieved, the starting time is effectively shortened, cavitation is prevented, the operation efficiency and reliability are improved, and the service life of equipment is prolonged.

The application discloses a kind of continuous self-bleeding self-suction pumps, it is related to self-suction pump technical field, including main body, the upper portion of the main body is provided with self-suction tank, the top of the main body is equipped with steam jacket heat tracing, the upper end of steam jacket heat tracing is equipped with injection device, the lower end of self-suction tank is provided with sealing device, the middle of sealing device is equipped with pipeline, the bottom of pipeline is equipped with fixing device, the right end of fixing device is provided with ground tank, the upper end of ground tank is equipped with nitrogen pressure exhaust pipeline device.The application is fixed on the upper end of steam jacket heat tracing by outer frame, then connects steam pipe line by the pipe joint of right end, exhausts gas in ground tank to expansion pipe, carries out gas expansion, exhausts the gas after completion of expansion to mixing chamber, makes it mixed jet pump, then is discharged by nozzle, without manual filling pump.Again by the pipeline cavity of through frame inner cavity through connecting pipeline.

The utility model provides a self-priming pump without a stop valve, belongs to the field of water pumps, and solves the problem that the stop valve in the self-priming pump is easy to break down. The pump body is connected with a water inlet pipe and a water outlet pipe, a rotating shaft is installed in the motor, the water inlet pipe is connected with a water inlet channel of the pump body, the water inlet channel is connected with an impeller chamber, an impeller is installed in the impeller chamber, the impeller is fixedly connected with the rotating shaft, the impeller chamber is provided with a water outlet, the water outlet inclines leftwards, and an opening is formed in the left side of the impeller chamber. A supporting frame is installed between the opening and the motor, a through hole is formed in the impeller chamber, a water outlet is formed in the pump body, and a sealing plug is connected into the water outlet in a threaded mode. The utility model has the advantages that: a stop valve is omitted, so that various faults caused by the stop valve are avoided; the impeller is mounted in the independent impeller chamber in the pump body, so that the impeller can form vacuum conveniently, and the self-suction capacity is improved; and a water outlet and a through hole are formed, so that residual water in the pump body can be discharged conveniently.

The invention relates to the technical field of self-suction multi-stage pumps, and discloses an energy-saving strong self-suction multi-stage pump which comprises a pump body and a driving shaft and further comprises a vacuum chamber connected with the pump body, a vacuum impeller connected with the driving shaft and located in the vacuum chamber, a mechanical seal, a water inlet section at the end of the pump body and a circulating water tank. The two sets of mechanical seals are located at the joint of the vacuum chamber and the driving shaft and the joint of the pump body and the driving shaft correspondingly. The exterior of the vacuum chamber is communicated with a water inlet pipe and a water outlet pipe which are respectively connected with a water inlet section at the end part of the pump body and the circulating water tank; the outer part of the circulating water tank is connected with a sealing auxiliary pipe connected with the mechanical seal; the exterior of the circulating water tank is connected with a drainage pipe; and a supporting bearing is connected between the pump body and the driving shaft. The energy-saving strong self-suction multi-stage pump has the advantages that vacuum auxiliary water pumping can be conveniently formed, and meanwhile sealing can be assisted.

The invention provides a dual-purpose centrifugal pump system with a self-suction function, belongs to the technical field of centrifugal pumps, and solves the problem in the prior art that sewage suction can be influenced by arranging a bottom valve. The device comprises a centrifugal pump volute, the centrifugal pump volute is connected with a drainage pipe, the drainage pipe is communicated with a water outlet pipe and a water injection exhaust pipe, the centrifugal pump volute is provided with a water injection port connected with the water injection exhaust pipe, a normally-open one-way valve is arranged in the water injection exhaust pipe, and the horizontal height of the normally-open one-way valve is larger than that of the highest position of the drainage pipe. A suction pipe is arranged at the axis of the centrifugal pump volute, and the horizontal height of the highest position of the suction pipe is larger than that of the centrifugal pump volute. When the centrifugal pump is used for the first time, water is injected into the centrifugal pump volute through the water injection and exhaust pipe, gas is exhausted, the injected water can be reserved in the centrifugal pump volute, and it is guaranteed that the centrifugal pump achieves the self-suction function later; backflow of liquid can be prevented without a bottom valve, and the phenomenon that work of the centrifugal pump is affected by blockage of the bottom valve is avoided.

The utility model discloses an impeller structure for a self-priming pump, and particularly relates to the technical field of self-priming pumps, the impeller structure comprises a self-priming pump body, and impeller transmission devices are arranged on the inner wall and the outer wall of the self-priming pump body; the impeller transmission device comprises an impeller body, the supporting and protecting assembly is installed on the outer wall of the self-priming pump body. Compared with the prior art, the impeller structure for the self-priming pump has the advantages that a plurality of groups of flow guide blocks and flow guide grooves are arranged to synchronously stir to increase the collision pressure of a water body, so that the circulation power of the whole water body is further improved, and the problem of low transmission efficiency caused by lower circulation power of the water body is solved; according to the device, through mutual cooperation of a rotating impeller, a flow guide block and a flow guide groove arranged in the driving assembly, the water flow conveying speed is increased, and meanwhile the rotating conveying efficiency of the whole device is further improved.

The utility model relates to the technical field of self-priming centrifugal pumps, in particular to a jet type self-priming centrifugal pump which comprises a driving part, a transfer mechanism arranged on the driving part, a pressure reduction and drainage mechanism arranged in the transfer mechanism and a turbine water suction mechanism arranged in the pressure reduction and drainage mechanism. The transfer mechanism comprises an outer bin and a sealing column head movably installed in a hole in the outer end of the outer bin. A bin body structure of a traditional integral structure is arranged to be the transfer mechanism and the pressure reduction and drainage mechanism which are of a quick-assembly structure, and the turbine water absorption mechanism capable of being passively separated is arranged in the pressure reduction and drainage mechanism, so that when the pump body is used for a long time and clogging or impeller damage exists, the turbine water absorption mechanism can be quickly separated from a transmission shaft in a motor, and the pump body is prevented from being damaged. At the moment, the pressure reducing and water draining mechanism can quickly take out the separated turbine water absorbing mechanism, and at the moment, the device can clean and quickly maintain all structures of the impeller and the inner cavity of the pump body without tedious loading and unloading operation.

The invention relates to the technical field of centrifugal pumps, and discloses an OH2 type self-priming centrifugal pump which comprises a bottom plate, a buffering protection mechanism is arranged at the top of the bottom plate, a pump body mechanism is arranged at the top of the buffering protection mechanism, a filtering mechanism is arranged on the left side of the pump body mechanism, and a mounting plate is fixedly connected to the outer portion of the bottom plate. The buffer protection mechanism comprises a mounting assembly and a buffer assembly. Vibration generated by the device enables a top plate at the bottom of a mounting frame to move downwards, at the moment, the top plate pushes a second inclined block, then a sliding block in a second rotating plate is driven to slide in a straight plate, meanwhile, the sliding block also drives a first rotating plate to rotate outside a fixing base, and in order to buffer the actions, a second damper, a second spring and a third spring jointly act, so that the movement is buffered. In addition, the first damper is matched with the first spring to buffer the downward pressure of the top plate, and the buffering measures are beneficial to reducing vibration of the device, protecting the device and prolonging the service life.

The application discloses a sewage collection system for dispersed emission sources 2 O processing linkage system and processing method, the linkage system comprises: sewage pretreatment and pipe network collection system, A 2 O processing system and discharge system. The application solves the sewage collection problem caused by complex terrain in the sewage collection range by adopting negative pressure collection technology, improves the sewage collection efficiency, creatively applies the air stripping technology, the Venturi technology and the siphon technology to the sewage process, and only needs a self-priming pump to realize the sewage collection and A 2 O process of sewage lifting, sludge and water backflow and oxygenation; the Venturi jet device directly performs jet aeration on the aerobic tower, reduces the dependence on high-energy consumption mechanical aeration blower, avoids resource waste and material loss; meanwhile, the water flow and dissolved oxygen distribution of the reaction tank are optimized, natural circulation is formed between the aerobic tower and the anoxic tower through the density difference, no additional power is needed, the energy consumption is reduced, the denitrification and phosphorus removal process is promoted, and the treatment efficiency is significantly improved.