2946 results about "Pump head" patented technology

The invention provides a driving control mechanism which is applied to a left ventricle assisting device, the left ventricle assisting device further comprises a transmission shaft, the driving control mechanism comprises a shell, a twisting shell driving module and a mandrel driving module, the twisting shell driving module and the mandrel driving module are sequentially arranged in the shell, and the far end of the twisting shell driving module is in transmission connection with a twisting shell of the transmission shaft. The far end of the mandrel driving module is in transmission connection with a mandrel of the transmission shaft and is detachably connected with the near end of the twisting shell driving module. When the far end of the mandrel driving module is connected with the near end of the twisting shell driving module, the mandrel driving module drives the mandrel and the twisting shell to rotate synchronously. When the far end of the mandrel driving module is separated from the near end of the twisting shell driving module, the twisting shell driving module drives the twisting shell to rotate relative to the mandrel. According to the driving control mechanism, synchronous or relative rotation of the mandrel and the twisting shell can be achieved, then folding, unfolding and rotating movement of a pump head impeller in the left ventricle auxiliary device is achieved, and the use efficiency and safety of the left ventricle auxiliary device are improved.

Systems and methods for controlling an implantable pump are provided. For example, the exemplary controller for controlling the implantable pump may only rely on the actuator's current measurement. The controller is robust to pressure and flow changes inside the pump head, and allows fast change of pump's operation point. For example, the controller includes, a two stage, nonlinear position observer module based on a reduced order model of the electromagnetic actuator. The controller includes an algorithm that estimates the position of the moving component of the implantable pump based on the actuator's current measurement and adjusts operation of the pump accordingly. Alternatively, the controller may rely on position measurements and / or velocity estimations.

The invention provides a preparation method of a left ventricular assist device, the left ventricular assist device comprises a micro pump head, a transmission shaft and a driving control mechanism, the micro pump head comprises a pump head impeller and a pump head transmission assembly, the transmission shaft comprises a mandrel and a twisting shell, and the driving control mechanism comprises a twisting shell driving module and a mandrel driving module. The method comprises the following steps that a pump head transmission assembly penetrates through a pump head impeller, and the far end and the near end of the pump head impeller are fixed to the far end of the pump head transmission assembly and the far end of a twisting shell correspondingly; a mandrel is inserted into the twisting shell, and the far end of the mandrel and the near end of the pump head transmission assembly are fixed; the twisting shell driving module is arranged at the far end of the mandrel driving module and is detachably connected with the mandrel driving module, and the far end of the twisting shell driving module is in transmission connection with the near end of the twisting shell; and the far end of the mandrel driving module is in transmission connection with the near end of the mandrel. According to the scheme, the left ventricle auxiliary device with the instrument micro-size and the high blood supply flow can be obtained, and the use safety and the working efficiency of the left ventricle auxiliary device are improved.

The invention provides a micro pump head and relates to the technical field of micro pumps, the micro pump head is applied to a left ventricular assist device, the left ventricular assist device further comprises a transmission shaft and a drive control mechanism, and the micro pump head comprises a pump head impeller and a pump head transmission assembly. The near end of the pump head impeller is in transmission connection with a twisting shell driving module of the driving control mechanism through a twisting shell of the transmission shaft, and the near end of the pump head transmission assembly is in transmission connection with a mandrel driving module of the driving control mechanism through a mandrel of the transmission shaft. The mandrel driving module drives the mandrel and the twisting shell to rotate synchronously so as to drive the far end and the near end of the pump head impeller to rotate together, and the twisting shell driving module drives the twisting shell and the mandrel to rotate relatively so as to drive the near end of the pump head impeller to rotate relative to the far end. The micro pump head can be unfolded or folded to change the outer diameter size of the micro pump head in the human body, so that the blood supply efficiency and the use safety of the auxiliary device are improved.

The invention provides a left ventricle auxiliary device which comprises a driving control mechanism, a left ventricle auxiliary device, a left ventricle auxiliary device and a right ventricle auxiliary device. The transmission shaft comprises a twisting shell and a mandrel, and the twisting shell is movably arranged outside the mandrel in a sleeving mode; the micro pump head comprises a pump head impeller and a pump head transmission assembly, the near end of the pump head impeller is in transmission connection with the twisting shell driving module through a twisting shell, the far end of the pump head transmission assembly is fixedly connected with the far end of the pump head impeller, and the near end of the pump head transmission assembly is in transmission connection with the mandrel driving module through a mandrel. The mandrel driving module drives the mandrel and the twisting shell to rotate synchronously so as to drive the far end and the near end of the pump head impeller to rotate together, so that the pump head impeller rotates at a fixed outer diameter; and the twisting shell driving module drives the twisting shell and the mandrel to rotate relatively so as to drive the near end of the pump head impeller to rotate relative to the far end, so that the pump head impeller is folded or unfolded. According to the scheme, the outer diameter of the micro pump head in the left ventricle auxiliary device can be adjusted, so that the use efficiency and safety of the micro pump head are improved.

The utility model discloses an automatic assembling machine for a bacterium-blocking membrane assembly of a dosing pump head, which comprises a machine base, a cam driving device in the machine base and a rotary material conveying mechanism, and a product jig is arranged on the rotary material conveying mechanism. An inner plug feeding mechanism, a filter membrane feeding mechanism, a shell feeding mechanism, a pressing mechanism, a product detection mechanism and a discharging mechanism are sequentially arranged on the machine base in the movement direction of the rotary material conveying mechanism. The inner plug feeding mechanism is used for placing an inner plug on the product jig, the filter membrane feeding mechanism is used for cutting a filter membrane and can place the filter membrane on the product jig, the shell feeding mechanism is used for placing a shell on the product jig, and the pressing mechanism is used for pressing the shell to be connected to the periphery of the inner plug in a sleeving mode. The product detection mechanism is used for detecting whether products on the product jig are qualified or not, and the discharging mechanism is used for moving out the products on the product jig. According to the bacteria blocking module assembling machine, the bacteria blocking module assembly can be automatically assembled, manual participation is not needed, the labor cost is reduced, and the assembling efficiency and the yield can be improved.

The utility model discloses a biphase stable type peristaltic pump unit which comprises a machine shell, a driver, a pump head and an elastic hose, the driver is arranged on the machine shell, the driver is connected with the pump head, the machine shell and the pump head are matched to extrude the elastic hose, the pump head is provided with a rotating shaft connected with the driver, and the rotating shaft is provided with a first rotating assembly and a second rotating assembly. The first rotating assembly is provided with a first extrusion roller, the second rotating assembly is provided with a second extrusion roller, and the first extrusion roller and the second extrusion roller alternately extrude the elastic hose to form phase difference; the pulse phenomenon that the first rotating assembly and the second rotating assembly extrude the elastic hose to output fluid is weakened to a certain degree through the phase difference, and the provided double-phase stable peristaltic pump unit can better achieve stable conveying of the fluid.

A liquid cooling method and system for estimating power consumption of cooling rack-mounted processing assemblies and controlling corresponding fan and pump speeds, is presented. The presented method and system provide for the estimation of the power consumption of the rack-mounted data processing assemblies by calculating a thermal load based on measured cooling liquid temperatures, heated liquid temperatures, ambient dry cooler temperatures, and cooling liquid volume and controlling the fan speed based on the estimated power consumption. The presented method and system also provide for controlling the pump speed based on measured flow rates and corresponding empirically derived pump head pressure values H.

The invention provides a modularized flow guide type multi-stage pump, and belongs to the technical field of water pumps. The modularized flow guide type multi-stage pump comprises a pump body assembly and a driving motor, the pump body assembly is formed by sequentially connecting a pump head pattern plate, a multi-stage pump shell, a multi-stage flow guide module set and a water retaining sealing cover, the pump head pattern plate is adjustably connected with a connecting end cover of the driving motor through a long screw rod, and the stage number of the pump can be adjusted by increasing or decreasing the number of the flow guide shells. Different lift requirements are met; the multi-stage flow guide module group is mainly composed of a water inlet flow guide shell, a transmission flow guide shell and a water outlet flow guide shell, a closed impeller is arranged in each flow guide shell to form an independent flow guide module, fluid is guided by spiral flow guide blades between the flow guide shells to orderly flow and smoothly transmit, and turbulent flow eddy current loss is reduced; and the water retaining sealing cover realizes double leakage prevention through a stepped sealing flange and mechanical sealing. The high-lift and high-flow pump has the advantages of being easy to disassemble, assemble and maintain, modularized and flexible to adjust, low in energy loss, high in lift, high in flow and high in sealing performance.

The invention provides a shield pump. The shield pump comprises a pump head; the shielding sleeve is matched with the pump head, and a main cavity is defined by the shielding sleeve and the pump head; the stator structure comprises a stator body and an injection molding layer, the injection molding layer wraps at least part of the stator body, and a rotor mounting hole penetrating through the stator structure in the preset direction is formed in the stator structure; the rotor structure is mounted in the rotor mounting hole, and the stator structure and the rotor structure are isolated by the shielding sleeve; the impeller is arranged in the main cavity, and the impeller is connected with the rotor structure; the control box is fixedly connected with the stator structure in the preset direction, and an electrical element in the control box is electrically connected with the stator body through a connecting terminal; and the first sealing element is arranged between the stator structure and the control box, and the first sealing element is used for sealing and isolating the connecting terminal. According to the embodiment of the shield pump, the technical problem that the fault rate of a shield pump in the related technology is high is solved.

Systems and methods for testing a pump assembly for a cooled radiofrequency treatment procedure. In some embodiments, the pump assembly and at least one pump head are driven by at least one respective motor, where the at least one pump head is coupled to tubing for delivering a cooling fluid to a medical probe assembly. The at least one pump head is configured to pump the cooling fluid through the tubing for the cooled radiofrequency treatment procedure. The system can also include a programmable controller operatively connective to the pump assembly and configured to control the pump assembly, and one or more pump function sensors for sensing operation parameters associated with the pump assembly and communicating the pump operation parameters to the controller. The controller can determine that the pump assembly is operating properly based on the operation parameters and can adjust the operation of the motor or output an alert.

The invention discloses a water purifier system using a novel diaphragm pump. The water purifier system comprises a water inlet electromagnetic valve, a front filter element, a booster pump head, a filter element, a water suction pump head, a first one-way valve, a rear filter element, a pressure switch and a water outlet valve which are connected in sequence, the booster pump further comprises a motor and a water storage device, the motor is a double-output-shaft motor, one output shaft is in transmission connection with the booster pump head, the other output shaft is in transmission connection with the water suction pump head, and the water suction pump head is connected with the water storage device. The dual functions of pressurizing the filter element assembly and rapidly pumping water from the water storage device can be achieved, and meanwhile the water purifier has great advantages in the aspects of cost, waterway complexity and size.

The hydraulic diaphragm metering pump comprises a pump head, a pump body and a motor, a transmission assembly is arranged in the pump body, the motor is used for driving the transmission assembly, and the transmission assembly comprises a driving shaft, a constant-speed cam, a first plunger assembly and a second plunger assembly. The first plunger assembly and the second plunger assembly are located on the two sides of the constant-speed cam respectively, the first plunger assembly is used for controlling the first diaphragm assembly, and the second plunger assembly is used for controlling the second diaphragm assembly. The constant-speed cam structure is optimally designed, reciprocating synchronous control over the first plunger assembly and the second plunger assembly is achieved, and in the reciprocating motion of the first plunger assembly and the second plunger assembly, a first diaphragm cavity and a second diaphragm cavity are in the discharging and sucking complementation state; medium flow in the first pump cavity and the second pump cavity is always in a complementary process, and medium flow transmission is always in a constant state.

The invention discloses a constant flow metering pump which comprises a cam box, a pump head and a confluence block, a driving mechanism, a cam mechanism and at least two connecting rod mechanisms are arranged in the cam box, and the output end of the driving mechanism drives the cam mechanism to rotate, so that the cam mechanism drives all the connecting rod mechanisms to reciprocate at phase differences; the pump head is provided with cavities in one-to-one correspondence with the connecting rod mechanisms, the cavities are connected with pistons in a sliding mode, the pistons are connected with the connecting rod mechanisms, and when the driving mechanism drives the cam mechanism to rotate by one circle, the pistons alternately suck liquid and discharge liquid; the confluence block is provided with a liquid inlet channel and a liquid outlet channel, all the cavities are communicated with the liquid inlet channel and provided with liquid inlet one-way valves respectively, and all the cavities are communicated with the liquid outlet channel and provided with liquid outlet one-way valves respectively. The technical problems that in the prior art, the pulsation phenomenon occurs in filling, and the filling efficiency is too low can be solved.

The utility model relates to the field of excess pressure recoverers, in particular to an excess pressure recoverer for a heat supply system, and solves the technical problems that fluid pressure energy loss exists in a high-low area water supply recovery system of a building, and the heat supply and refrigeration operation cost of a high area is high. According to the technical scheme, the excess pressure recoverer for the heat supply system comprises a water feeding pump head, a water returning pump head, a coupler, an end disc, a rotary disc, a pump shaft, an impeller and a clamping and fixing assembly. The two pump heads are combined with the coupling and the pump shaft to be oppositely connected to form the residual pressure recoverer, the overhigh water return pressure in a high area can be converted into mechanical energy through the rotating impeller in a water supply and water return system, the pump heads of the water pump installed on a water supply pipeline are driven to do work, the electric energy consumption of an original water supply pressure pump is reduced, and the cost is reduced. And the problems of fluid pressure energy loss and high heat supply and refrigeration operation cost of a high area in a high-low area water supply recovery system of a building are solved.

The utility model discloses a peristaltic pump which comprises a pump head, an installation inner cavity is formed in the pump head, two installation holes communicated with the installation inner cavity are further formed in the pump head, and a positioning part is arranged in the installation inner cavity. The pump core assembly comprises a rotating core body and a plurality of extrusion rotors, and the extrusion rotors are rotatably arranged on the rotating core body; a positioning matching part is arranged on the outer pipe wall of the pump pipe; wherein the rotating core body is rotatably arranged in the mounting inner cavity, the positioning part is distributed around the outer side of the rotating core body, the pump pipe extends into the mounting inner cavity and is wound outside the rotating core body, the extrusion rotor abuts against the pump pipe, the two ends of the pump pipe extend out of the mounting inner cavity through the corresponding mounting holes, and the positioning matching part is connected with the positioning part. The installation reliability of the pump pipe is improved, so that the flow control accuracy of the peristaltic pump is improved.

The invention discloses a liquid pumping assembly of a hydraulic slurry pump and the hydraulic slurry pump adopting the liquid pumping assembly. The liquid pumping assembly of the hydraulic slurry pump comprises a left oil cylinder, a square box with a box cover, a cylinder sleeve, a pump head, a liquid outlet assembly and a right oil cylinder which are sequentially connected from left to right. The right end of the first power output shaft is connected with a piston capable of transversely moving in the cylinder sleeve through a movable connecting piece located in the square box. A top oil cylinder is vertically arranged at the top end of the pump head, a second power output shaft partially located in an inner cavity of the pump head is vertically arranged at the top of the top oil cylinder, and a first sealing valve is arranged at the bottom end of the second power output shaft. A pump head liquid outlet is formed in the right end of the pump head, a right oil cylinder is transversely arranged at the right end of the liquid outlet assembly, a third power output shaft partially located in an inner cavity of the liquid outlet assembly is transversely arranged in the right oil cylinder, and a second sealing valve is arranged at the left end of the third power output shaft; the liquid outlet assembly is provided with a liquid drainage hole communicated with an inner cavity of the liquid outlet assembly. The invention has the characteristics of stable and accurate flow and pressure and high stability.

The application discloses a kind of micro flow high pressure hydraulic diaphragm metering pump, including pump head and pump body, diaphragm piece is equipped between the pump head and pump body, pump head, including pump head body, feed valve and discharge valve;Pump body, including pump body and plunger assembly, plunger assembly is driven to diaphragm piece by reciprocating motion, plunger assembly includes cylinder sleeve, cylinder sleeve inside is equipped with plunger cavity, plunger cavity is equipped with plunger in cooperation, at least one oil supplement cavity is equipped in plunger cavity, plunger and cylinder sleeve are also equipped with combined sealing mechanism between it.The application is optimized plunger assembly, utilizes long axis plunger, forms small capacity hydraulic oil cavity, with the rapid reciprocating motion of plunger, can realize the high frequency small scale reciprocating operation of diaphragm piece, is suitable for the transmission of small size gauge medium flow passage in pump head, realizes micro high pressure output.

A pump can include a pump head, a body housing, a motor disposed within the body housing, and a motor shaft extending from the motor. The pump head can include a sensor, at least a first interface portion, and at least a first elongate conductor electrically connecting the sensor to the at least a first interface portion. The body housing can include at least a second interface portion and at least a second elongate conductor electrically connecting the at least a second interface portion to pump electronics. The sensor can be configured to sense when the at least a first interface portion does not contact the at least a second interface portion. When the at least a first interface portion does not contact the at least a second interface portion and the pump head is removed from the body housing, the pump head can be pivotable relative the motor shaft such that an orientation of the pump head can be changed with respect to the body housing.

The invention relates to a liquid-cooled electronic water pump which is characterized in that a waterproof sleeve and a waterproof sleeve sealing ring are respectively arranged on a stator assembly and a pump body, the waterproof sleeve and the pump body are welded into a whole through plastic welding to form a pump body assembly, a rotor assembly and a wear-resistant gasket are sequentially arranged on a fixed shaft of the pump body assembly, and a pump head sealing ring is sleeved on the outer edge of a spigot of the waterproof sleeve; then the pump head and the pump body are welded into a whole through plastic welding to form a water pump assembly, a heat dissipation metal plate sealing ring and a heat dissipation metal plate are installed on the water pump assembly and sealed through the sealing ring to form a water pump assembly assembly, heat conduction glue is coated on the surface of the heat dissipation metal plate, and a driver assembly is placed on the heat conduction glue; the driver assembly is fixed to the water pump assembly combined part through screws, and meanwhile the pump body, the rear cover, the motor leading-out PIN and the plug PIN are welded into a whole to form the liquid-cooled electronic water pump. The effects of miniaturization, high performance, low cost and long service life of the electronic water pump are achieved, and the cooling requirements of various electronic devices in the high-temperature environment are met.

The invention discloses a peristaltic pump and a material mixing method of the peristaltic pump. The peristaltic pump comprises a driving assembly, a pump head and an elastic hose, the elastic hose is installed in an annular groove in the pump head, and the rolling wheel in the pump head is driven by the driving assembly to rotate so as to extrude the elastic hose. The pump head comprises a pump shell and a planetary gear, the annular groove is located in the inner side of the pump shell, a gear ring of the planetary gear is fixed in the pump shell, a sun gear and at least three planetary gears are arranged on the inner side of the gear ring, a planetary shaft of each planetary gear extends upwards, each planetary shaft is sleeved with a rotatable idler wheel, and the idler wheels are arranged on the outer side of the pump shell. The sun wheel is driven to rotate through the driving assembly, and then all the planet wheels drive the corresponding rolling wheels to extrude the elastic hose. According to the peristaltic pump, the function of mixing solutions and the function of mixing the solutions with powder materials and solid materials are added, and the technical defects of an existing peristaltic pump are overcome.

A pump for dispensing a fluid, has a pump head, a piston body with a piston, a pump chamber limited by a pump chamber body, an inlet valve and an outlet valve, the piston being moveable by respective movement of the pump head between an upper starting position and a lower end position. A return stroke force for a return stroke from the lower end position into the upper starting position is provided by a bellows, formed by two bellows arranged one above the other, Each of the bellows is folded up, when moving the pump head into the lower end position, by exerting a compression force on the pump head, the first bellows receiving the compression force by direct engagement with the pump head, the second bellows receiving the compression force only by engagement with the first bellows.

The invention discloses a combined high-precision peristaltic pump which comprises a driver, a pump head, a combined fixing mechanism and a grip, the pump head is arranged at one end of the driver, the combined fixing mechanism is installed at the bottom of the driver, and the grip is fixedly connected to the top of the driver. The pump head comprises a wheel seat, a wheel block group, a hose, a connecting wire pipe, a transmission rod, a connecting rod, a fixing pipe, a fixing bolt, a rubber pad, a rotary clamping rod and a clamping hole, the rotary clamping rod is fixedly connected to one end of the driver, the wheel block group is arranged at one end of the wheel seat, the hose is arranged in the wheel block group, and the connecting wire pipe is arranged in the clamping hole. The connecting wire pipe is fixedly connected to the top of the wheel block set, and the transmission rod is arranged on the front face of the wheel block set. According to the peristaltic pump, the connecting rod is adopted to be matched with the fixing pipe, the peristaltic pump can be installed on a combined fixing mechanism, the multiple pump heads can enable the driver to drive the multiple hoses to conduct metering work of infusion, and high-precision infusion measurement of the peristaltic pump is guaranteed.

The utility model provides a portable large-flow peristaltic pump, which belongs to the technical field of peristaltic pumps and comprises: a peristaltic pump body, a pump head assembly is installed on one side of the peristaltic pump body, the pump head assembly comprises a first shell, a connecting block, a second shell, a roller frame and a pressing block, a plurality of roller shafts are installed inside the roller frame, the pressing block is slidably connected to the top of the first shell and matches the roller frame, two groups of fixing assemblies are installed on both sides of the peristaltic pump body, and one side of the two groups of fixing assemblies is installed with an adjusting assembly, a hose is installed and fixed by the pump head assembly to prevent the hose from falling off, and hoses of different sizes can be passed through to improve the application range of the equipment, the fixing assembly can fix the hose, and the tension of the hose can be adjusted by the adjusting assembly to avoid shaking of the hose and improve the protection effect of the hose.

The invention discloses a damping type chemical pump body, relates to the technical field of chemical pump bodies, and solves the technical problem that in the water suction work of a chemical pump, inlet water possibly carries surface vortexes and wall-attached vortex strips, enters an impeller working chamber and then is cut by blades to cause vibration. Comprising a pump body part, and a pump head is arranged on the left side of the pump body part; the pump shaft is arranged in the pump body piece; the guide vibration reduction mechanism is mounted on the left side of the pump head and is used for guiding inflow flow; the guide vibration reduction mechanism comprises a water inlet pipe mounted on the left side of the pump head and a flow guide component mounted at the left end of the pump shaft; according to the invention, a flow guiding and carding effect on sucked water flow can be realized, so that the water flow does not have vortex or wall-attached vortex strips, the water flow cannot be cut by a pump impeller to generate vibration, a damping effect on the whole chemical pump is realized, meanwhile, instant impact and pressure of the sucked water flow on the pump impeller can be reduced, loss and vibration caused by instant impact are reduced, and the service life of the chemical pump is prolonged. The use stability of the whole chemical pump is improved.

The utility model discloses an air bag pump which comprises a pump head, an air bag, an air bag and an air bag, the air bag is provided with a closed end and an open end; the pump shell is installed on the pump head in a sealed mode, and the pump shell is provided with an outer wall body; one end of the pump shaft is rigidly connected with a mounting plate; a first elastic adjusting piece is arranged between the mounting plate and the closed end of the air bag; the installation plate is detachably fixed to the closed end of the air bag, and the installation plate and the closed end of the air bag oppositely extrude the first elastic adjusting piece so that the air bag and the pump shaft can be kept horizontal. The first elastic adjusting piece is used for making contact with the mounting plate and the closed end of the air bag in an extrusion mode, direct contact between the mounting plate and the closed end of the air bag is replaced, and the elastic deformation quantity of the first elastic adjusting piece can be different when the first elastic adjusting piece is extruded at different positions; therefore, the problem that surface defects such as inclined areas or uneven areas exist on the opposite end faces between the mounting plate and the closed end of the air bag is solved.

The utility model belongs to the technical field of transmission, and particularly relates to a transmission pump which is characterized by comprising a driving device, a first pump head, a second pump head and a pump head switching mechanism linked with the driving device, the first pump head and the second pump head. The pump head switching mechanism is used for controlling the first pump head to work when the driving device rotates in the first direction and used for controlling the second pump head to work when the driving device rotates in the second direction. Wherein the first direction is opposite to the second direction. On one hand, the two pump heads are arranged to meet the conveying requirements of various consumables, pollution between the different consumables can be avoided, on the other hand, control switching of the first pump head and the second pump head can be achieved through forward rotation and reverse rotation of the driving shaft, and conveying control over the different consumables can be achieved through simple control instructions.

The invention provides a preparation method of a micro pump head, and relates to the technical field of pump head preparation, the preparation method of the micro pump head comprises the step of preparing a pump head impeller, and the step of preparing the pump head impeller comprises the following steps: arranging an impeller framework wire between a near-end fixing ring and a far-end fixing ring in a spiral shape; preparing an impeller blade surface by using the impeller blade surface mold and an elastic raw material; the far-end fixing ring is fixed, the near-end fixing ring is rotated in the spiral direction of the impeller framework wire, the impeller framework wire is pre-tightened to be in a multi-period spiral shape, then the impeller blade face is arranged on the surface of the pre-tightened impeller framework in a sleeving mode, the pre-tightening force is released, the impeller framework wire recovers to be in the at least period spiral shape under the self-elasticity effect, and the impeller blade face is jacked outwards. Therefore, the spiral impeller is formed. According to the preparation method provided by the invention, the elastic micro pump head can be obtained, so that the use safety and the working efficiency of the left ventricle auxiliary device are improved.

The invention provides an extracorporeal membrane oxygenation kit and a using method thereof.The extracorporeal membrane oxygenation kit comprises a pump head, an oxygenator and an extracorporeal circulation pipeline, the pump head is communicated with the oxygenator through the extracorporeal circulation pipeline, the extracorporeal circulation pipeline comprises a pipeline body and quick connectors, the two ends of the pipeline body are connected with the quick connectors, and the quick connectors are connected with the pump head. The pump head is communicated with one end of the pipeline through one quick connector, the oxygenator is communicated with the other end of the pipeline through the other quick connector, each quick connector comprises a female head and a male head, and the female head and the male head are connected in a clamped mode. According to the extracorporeal membrane oxygenation sleeve bag, the pump head, the oxygenator and the extracorporeal circulation pipeline are connected with one another through the quick connector, the quick connector is connected with the male connector in a clamped mode through the female connector for quick connection and disconnection, and therefore quick replacement can be conducted when thrombus appears in the extracorporeal membrane oxygenation sleeve bag.

The invention belongs to the technical field of liquid pumps, and particularly relates to a plunger pump. Four plunger holes are distributed in the pump head in a matrix mode, water inlet one-way valves are arranged in the four plunger holes, a water outlet pipeline communicated with the corresponding plunger hole is arranged on the pump head beside each plunger hole, a first water outlet one-way valve is arranged in each water outlet pipeline, a water catchment channel is further arranged in the pump head, and the water catchment channel is communicated with the water outlet pipelines through communicating holes. The water outlet hole is communicated with the water catchment channel, and a second water outlet one-way valve is arranged on the water outlet hole; the pump head is further provided with a water return channel and a pressure regulating valve hole, the water return channel, the pressure regulating valve hole and the water catchment channel are communicated, and a pressure regulating valve is arranged in the pressure regulating valve hole. The water outlet hole and the pressure regulating valve hole are obliquely formed in the pump head, and the outer ends of the second water outlet one-way valve and the pressure regulating valve extend out of the pump head and are located on the two sides of the water inlet hole; the four plunger holes are distributed in a matrix mode to replace a traditional linear side-by-side layout to share the same water catchment channel and the same water return channel, and space and materials are saved.