2597 results about "Peristaltic pump" patented technology

The invention discloses a method for in vitro slow release performance evaluation of a slow and controlled release preparation based on the overflow principle. A container with an upper outlet and a lower outlet is adopted to serve as a release tank, a to-be-detected medicine and a dissolution medium are placed in the release tank, a stirring device is adopted in the release tank to perform stirring, and the dissolution medium is added from the lower outlet of the release tank through a peristaltic pump; the dissolution medium dissolved with the medicine is taken away through the overflow from the upper outlet so as to offset medicine absorption or metabolism, and the slow and controlled release speed of the medicine, the total medicine overflow quantity and the total release amount are calculated by measuring the concentration of the medicine contained in the dissolution medium flowing out, the volume of the release tank and the overflow quantity. According to the method, the releasing degree of the slow and controlled release medicine can be evaluated accurately, the effective medicine release time of the slow and controlled release preparation is evaluated, and slow release performances of the slow and controlled release preparation are evaluated comprehensively.

A peristaltic pump can include a chassis and a chassis retaining portion forming a cavity. The pump can also include a rotor, a cover, and a linkage. The rotor can be disposed within the cavity such that tubing can be held between the rotor and the chassis and / or the chassis retaining portion. The linkage can couple the cover to the chassis. The linkage can include an arm. When opening the cover, the arm can pivot such that the chassis moves away from the chassis retaining portion to widen the cavity. When closing the cover, the arm can pivot such that the chassis moves toward the chassis retaining portion. When closed, a stop can restrict further movement of a corresponding member toward the chassis retaining portion.

The invention provides a multi-motor pulse speed regulation control method and system, and relates to the technical field of motor control, the method comprises the steps that a target set quantity and a target motor identifier are obtained, a target driving parameter is obtained through conversion according to a parameter set associated with the target motor identifier, and the parameter set comprises an elastic modulus value and a stress relaxation coefficient of a peristaltic pump hose; real-time driving parameters are maintained for the multiple pulse output channels respectively, and refreshing is carried out at the synchronization moment; operating state feedback values of a peristaltic pump channel and a stirring motor channel are collected, a water hammer effect frequency component and an impeller passing frequency component are extracted, and correction is carried out based on the elastic parameters; and judging whether a cross-channel resonance judgment condition is met or not, and when the condition is met, determining a frequency correction amount and a phase correction amount and applying the correction amounts to at least one pulse output channel, thereby reducing the resonance risk and stabilizing the system operation.

An exemplary active recirculation system and method for aerosol collection are disclosed that employ recirculation via one or more active pumps (e.g., peristaltic pumps) to continuously circulate a collection buffer within an aerosol collection frontend to improve the collection efficiency. In using less fluid volume, the exemplary active recirculation system and method increase the concentration of the target particle. A high concentration of particles may be advantageous when detecting pathogens downstream of collection. The aerosol collection frontend connects to a collection reservoir. During a collection cycle, a pump draws the fluid from the collection reservoir and pumps the collected fluid back into the collection front end at a set flow rate.

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.

The invention discloses a test device and a test method for filling fracture seepage-erosion visualization. The test device comprises a fracture overflowing model, a fluid flow control system and an image and pressure data acquisition and analysis system. The fracture overflowing model has the appearance of a real rock fracture surface, and the opening degree can be quantitatively adjusted through a filler gauge gasket; the fluid flow control system uses a peristaltic pump and a stirrer to provide constant-flow fluid and particle input for the fracture overflowing model; according to the test device, the light transmission principle is utilized, quantitative and visual observation and research of the seepage-erosion process of the filled fracture are achieved, and form and permeability evolution data of a particle erosion area in the filled fracture are accurately obtained.

The invention discloses a smelting wastewater trace arsenic real-time monitoring method based on an electrochemical sensing array, and relates to the technical field of electrochemical detection.The method comprises the steps that bypass sample flow is established through a peristaltic pump and pre-filtered, and stable sample flow is obtained; the sample flow is divided into a first passage and a second passage, and a form distinguishing sample flow is obtained after oxidation setting and medium equalization; performing short-time adsorption equilibrium to obtain an interface state parameter set, executing multi-segment coded deposition control based on the parameter set, and collecting a dissolution current curve; a dissolution signal set is obtained by applying single-frequency perturbation signals, characteristic peak parameters are extracted and subjected to correlation calculation with a multi-section response matrix, the total arsenic concentration and the pentavalent arsenic concentration are calculated through a weighted inversion algorithm, and a confidence interval is obtained; and calculating the concentration of the trivalent arsenic and determining an uncertainty range according to the two. According to the method, the quality judgment result is linked with the dynamic adjustment of the sampling flow, the potential amplitude and the deposition duration, so that the self-adaptive optimization control of the detection process is realized.

The invention discloses a micro-reagent ammonia nitrogen on-line continuous analyzer and an analysis method, and belongs to the technical field of water quality ammonia nitrogen monitoring, the micro-reagent ammonia nitrogen on-line continuous analyzer comprises a first injection pump, a second injection pump, a multi-channel valve, a liquid storage ring and a reaction tank; liquid outlets of the first injection pump and the second injection pump are respectively connected with one end of the liquid storage ring and a circulating port of the reaction tank through different channels of the multi-channel valve; a circulating port of the reaction tank is connected with a first peristaltic pump; the other end of the liquid storage ring is connected with a second peristaltic pump; liquid outlets of the first injection pump and the second injection pump are connected with a third peristaltic pump; a first reagent and a second reagent for ammonia nitrogen analysis are respectively stored in the first injection pump and the second injection pump; different channels of the multi-channel valve are respectively connected with a standard sample and a water sample which are used for ammonia nitrogen analysis, and cleaning water. The micro-reagent ammonia nitrogen on-line continuous analyzer provided by the invention can reduce cross contamination of reagents, reduce reagent consumption and realize short-interval continuous analysis.

The invention discloses a method for controlling the compaction degree of a left heart and a right heart in an extracorporeal circulation operation, which comprises the following steps of: in an in-vitro environment, mounting a peristaltic pump at a left heart inlet and a right heart inlet of an extracorporeal circulation device; a liquid inlet of the peristaltic pump is connected with a liquid inlet pump, and a liquid outlet of the peristaltic pump is connected with a liquid outlet pump; and finally, a first pressure measuring structure and a second pressure measuring structure are arranged on the sides, away from the peristaltic pump, of the liquid inlet pump and the liquid outlet pump correspondingly, and the pressure of the liquid inlet pump and the pressure of the liquid outlet pump are adjusted to be-20 mmHg. The negative pressure of the liquid inlet pump is adjusted through the first pressure measuring structure, and the negative pressure of the liquid outlet pump is adjusted through the second pressure measuring structure, so that the purpose of quantifying the adjusting mode is achieved, and the adjusting mode is accurate, rapid and high in reliability; the peristaltic pump can effectively avoid the occurrence of risks such as blood component damage, hemolysis, gas embolism and the like caused by reduction of the amount of blood conveyed by the pump, insufficient blood supply or direct interruption of blood circulation due to the condition that a pipe body connected with the peristaltic pump is shrunken or cannot be sucked during an operation.

The invention discloses a post-treatment system and process for PBF printing plastic parts, and the post-treatment system comprises a solvent storage bottle, a part treatment assembly and a solvent recovery assembly; a solvent is stored in the solvent storage bottle; the part processing assembly is used for carrying out fairing treatment on the PBF printing plastic part; the solvent recovery assembly is used for recovering the vaporized solvent in the part treatment assembly and re-liquefying and storing the vaporized solvent; the output end of the solvent storage bottle is connected with the input end of a solvent cabin of the part treatment assembly through a peristaltic pump, and the part treatment assembly is connected with the solvent recovery assembly through a recovery valve. According to the principle that the solvent is rapidly vaporized under the pressure difference, then uniformly reaches any surface position of the workpiece and is condensed and liquefied again, the surface defects of the workpiece are gradually dissolved and leveled under the action of the solvent, then the solvent steam is liquefied and recovered again, and the residual solvent on the surface of the workpiece is removed. The common surface roughness problem of the 3D printing plastic part can be effectively improved, and the appearance quality of the part is improved.

The invention discloses a double-layer aeration system for preventing wire breakage and sludge deposition of an MBR double-layer component membrane pool, which comprises a raw water pool, a raw water inlet peristaltic pump, an MBR double-layer component membrane pool, a perforated aeration pipe, a pulse aeration box, an aeration pump, a gas meter, a water outlet gear pump, an ultrafiltration membrane component, a pressure sensor, a transmembrane pressure difference display, a sludge discharge peristaltic pump and a water outlet pool, the MBR double-layer assembly membrane pool comprises a first MBR membrane assembly and a second MBR membrane assembly, the first MBR membrane assembly and the second MBR membrane assembly are arranged in parallel, and the perforated aeration pipe and the pulse aeration box are configured to be used as aeration assemblies of the first MBR membrane assembly and the second MBR membrane assembly. According to the invention, the membrane is physically scrubbed by utilizing different aeration modes and a double-layer aeration mode, so that the phenomena of membrane pollution, sludge accumulation and wire breakage are effectively relieved, a reliable theoretical basis is provided for transforming an MBR membrane tank into a double-layer aeration mode in a water purification plant using the MBR hollow fiber membrane, and meanwhile, the method has important significance on reducing pollution and carbon.

The utility model discloses a flushing and pressure measuring pipeline of an endoscope flushing and suction system, which comprises a machine base, a peristaltic pump is arranged on the machine base, a flushing container is connected with the peristaltic pump and the flushing container through pipelines, and a filling and pressure measuring connector is communicated with an endoscope through a three-way connector. The perfusion pressure measuring bottle comprises a balloon bottle, a pressed connector is arranged at one end of the balloon bottle, the end, away from the pressed connector, of the balloon bottle is a threaded end, and the threaded end is an open connector end. A pressure transmission connector is arranged on the threaded end, a pressing disc is arranged at the end, close to the threaded end, of the pressure transmission connector, a protruding sealing ring base is arranged on the side, away from the pressure transmission connector, of the pressing disc, the pressing disc is sleeved with an air bag in an expansion state, and the air bag wraps the sealing ring base and then is arranged on the pressing disc in a sleeving mode. And the air bag is arranged in the cavity of the balloon bottle. The air bag is arranged in the saccule bottle of the flushing and perfusion pressure measuring bottle used in the endoscopic surgery, so that an isolation effect is achieved, a bacterium-blocking pressure measuring flushing pipeline is achieved, and the surgical risk is reduced.

The utility model discloses a double-roller radial continuous rotating peristaltic pump. A driving mechanism, a rotating mechanism, a hose mechanism and a pipe pressing mechanism are arranged on a mounting bedplate; the hose mechanism comprises an elastic hose, a cam and a supporting plate, the supporting plate is connected with the bearing seat and the cam, the bearing seat is connected with the mounting table plate, and the elastic hose surrounds the periphery of the cam in the radial direction; the pipe pressing mechanism comprises rollers and a guide assembly, the guide assembly is connected with the rollers and the rotating mechanism, and the rollers are symmetrically arranged on the two sides of the elastic hose. The rotating mechanism is connected with the driving mechanism, the driving mechanism drives the rotating mechanism to rotate, the rotating mechanism drives the guide assembly to rotate, the idler wheel installed on the guide assembly circumferentially rotates in the radial direction and extrudes the elastic hose, and continuous metering and conveying of fluid are achieved. The peristaltic pump has the advantages of being compact in structure, high in reliability, low in abrasion loss of the inner wall of the hose and the like, and solves the problem that fluid is polluted due to the fact that the inner wall of the hose is seriously abraded and a large number of particles are generated in an existing peristaltic pump.

The invention belongs to the technical field of sewage treatment, and discloses a two-stage MABR-based efficient denitrification system, method and application, the system comprises an MABR-PN / DN reactor, an MABR-PN / A reactor, a peristaltic pump, an aeration hollow fiber membrane module, a carrier, an aeration pump, a gas flowmeter, a pressure gauge and a liquid flowmeter, and the MABR-PN / DN reactor and the MABR-PN / A reactor are arranged along the vertical direction. According to the system, the series design of the MABR-PN / DN and the MABR-PN / A is utilized, the adverse effect of organic matter in sewage on anaerobic ammonia oxidation treatment of high-concentration ammonia nitrogen wastewater is reduced, nitrate nitrogen generated by the MABR-PN / A flows back to the first-stage MABR-PN / DN to achieve denitrification, the denitrification limitation of a single reactor and a single denitrification path is broken through, and the overall total nitrogen removal rate of the system is higher than 90%.

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 utility model discloses a power transmission low-pulsation peristaltic pump, which is characterized in that converging or shunting of an elastic hose is realized by utilizing a three-way pipe joint, a rotating mechanism is horizontally arranged on two sides of the elastic hose and is connected with a driving mechanism, and a plurality of groups of roller pressure pipe components are alternately and uniformly distributed on the rotating mechanism; the driving mechanism drives the rotating mechanism to drive the roller pipe pressing assembly to rotate; when the distance that the rollers on the two sides of the first elastic hose extrude the hose reaches L, the rollers on the two sides of the second elastic hose begin to extrude the hose; when the extrusion distance of the second elastic hose reaches L, the rollers on the two sides of the first elastic hose loosen the hose, then a new round of extrusion begins, and when the extrusion distance reaches L, the second elastic hose begins to conduct a new round of extrusion; and the two groups of elastic hoses are alternately extruded by circulating dislocation. The peristaltic pump solves the problem that fluid is polluted due to the fact that the inner wall of a hose in an existing peristaltic pump is seriously abraded and a large number of particles are generated, and pulsation during liquid transmission is effectively reduced.

A linear peristaltic pump (200) for a bioprocessing system comprises: at least one pair of jaws formed by a first jaw (201) and a second jaw (202), the first jaw (201) being moveable relative to the second jaw (202) such that the pair of jaws can be moved between an open configuration in which the jaws are spaced apart for receiving a flexible tube (155) therebetween and a closed configuration in which the jaws are brought together so as to retain the tube therebetween; an actuator mechanism configured to control movement of the first jaw relative to the second jaw; and means (220a-220m) for effecting a peristaltic pumping action on a fluid contained within the tube (155) when the tube is retained between the pair of jaws in the closed configuration.

A tube bracket for operatively engaging a tube with a peristaltic pump, the tube bracket comprising: a housing defining: a pump cavity for receiving a roller assembly of the peristaltic pump; and a tube path for receiving the tube, the tube path extending at least partially circumferentially around the pump cavity; and a part configured to receive a force such that, in use, a portion of the tube received in the tube path is biased against the roller assembly of the peristaltic pump in the pump cavity. A replaceable tube assembly comprising the tube bracket and a liquid distribution system comprising the tube assembly is also provided.

The invention discloses a parallel multi-fluid synchronous pumping micro peristaltic pump which is characterized in that a flow channel layer is provided with a plurality of fluid driving and conveying structures and flow stabilizing structures, and conveying straight flow channels are connected between an inlet liquid storage cavity and an annular driving flow channel and between an outlet liquid storage cavity and the annular driving flow channel in the fluid driving and conveying structures; the flow stabilizing structure comprises a plurality of communicated flow stabilizing cavities connected to the conveying straight flow channel between the outlet liquid storage cavity and the annular driving flow channel, the lower bottoms of the flow stabilizing cavities are in sealed connection with the base material layer, and the upper tops of the flow stabilizing cavities are in sealed connection with the thin film layer; the driving structure circularly extrudes the annular driving flow channel to generate negative pressure in the annular driving flow channel, working fluid enters from the inlet liquid storage cavity, passes through the conveying straight flow channel, the annular driving flow channel and the flow stabilizing structure, and stably outputs non-pulse working fluid from the outlet liquid storage cavity; the control module provides kinetic energy to the drive structure. According to the invention, multi-flow accurate pumping of the micro peristaltic pump is realized.

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 provides a balloon pressure control system and method and a computer readable storage medium. The balloon pressure control system comprises a pressing machine, a balloon, a balloon catheter and a pressure expansion pump. The balloon catheter comprises a medium cavity, an outlet of the medium cavity is located in the balloon, and the pressure expansion pump comprises a microprocessor and a pumping mechanism; the pumping mechanism comprises a liquid storage bag, a peristaltic pump and a first conveying pipe which are sequentially connected, the first conveying pipe is connected with the medium cavity, and a filling medium is stored in the liquid storage bag; the method is executed by a microprocessor and comprises the steps that when the microprocessor receives a pressing signal, a pumping mechanism is controlled to pump a filling medium into a balloon through a first conveying pipe by means of a peristaltic pump according to the initial filling speed and the preset filling time, so that balloon filling is completed; and when the release signal is received, the pumping mechanism is controlled to extract the filling medium in the balloon through the first conveying pipe by the peristaltic pump according to the initial release speed and the preset release time, so that the release of the balloon is completed.

The invention relates to a waste liquid treatment device for automatically separating radionuclides. The waste liquid treatment device comprises a first waste liquid collection passage and a second waste liquid collection passage, an upstream liquid supply channel shared by the two channels comprises an injection pump and a multi-way valve, and the injection pump inputs liquid into the multi-way valve. The first waste liquid collecting channel directly guides cleaning liquid, replacement liquid and the like which do not need to be reserved into a waste liquid barrel through a first output port of the multi-way valve. The second waste liquid collecting channel is sequentially connected with a plurality of resin columns, a waste liquid tank, a peristaltic pump and a waste liquid barrel through a second output port of the multi-way valve, waste liquid generated by the resin columns firstly enters the waste liquid tank for temporary storage, and when the liquid level of the waste liquid tank reaches a preset threshold value, the peristaltic pump automatically pumps and discharges the waste liquid into the waste liquid barrel for centralized collection. The device can distinguish reserved liquid from waste liquid according to steps, realizes automatic flow division, temporary storage and discharge of the waste liquid, avoids manual pouring of the waste liquid halfway, ensures continuous operation of a long-time and multi-channel separation process, and reduces the risk of personnel exposure in a radioactive waste liquid treatment process.

The invention discloses a quantitative test device and method for the infiltration degree of prepreg resin. The test device comprises a sample test system, and the sample test system is provided with a test cavity, a vacuum interface and a solvent injection port, wherein the vacuum interface and the solvent injection port are communicated with the test cavity; the vacuumizing system is used for vacuumizing the sample testing system and comprises a vacuum meter, a vacuum valve and a vacuum pump which are sequentially connected through a pipeline, and an air inlet of the vacuum meter is in butt joint with the vacuum interface; the infiltration system is used for pumping a solvent into the sample testing system and comprises a peristaltic pump and a solvent box which are sequentially connected through a pipeline, and a liquid outlet of the peristaltic pump is in butt joint with the solvent injection port; and the data acquisition and analysis system analyzes and processes the acquired information through a sensor assembly to obtain evaluation results of the infiltration rate and the infiltration uniformity of the solvent. The testing device is high in testing precision, good in repeatability and high in stability, and the testing method applying the testing device can achieve automatic operation and display testing results in real time.

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.

The invention discloses an energy-saving peristaltic pump, and relates to the technical field of peristaltic pumps, the energy-saving peristaltic pump comprises a shell, an extrusion mechanism, a limiting mechanism and a driving mechanism, and a hose and a limiting seat are accommodated in the shell; the extrusion mechanism is detachably arranged on the limiting seat and abuts against the hose; the limiting mechanism is arranged corresponding to the position of the extrusion mechanism, and the limiting mechanism can move between an abutting position or a releasing position close to or far away from the limiting seat and correspondingly abuts against or releases the extrusion mechanism to the limiting seat; the driving mechanism is connected with the limiting mechanism and used for driving the limiting mechanism to drive the extrusion mechanism to move in the circumferential direction of the limiting base when the limiting mechanism abuts against the extrusion mechanism. Through the detachable extrusion mechanism, the limiting mechanism and the driving mechanism matched with the limiting mechanism, a user can rapidly replace extrusion mechanisms of different sizes or shapes, and therefore the requirements for different liquid flows or flow speeds are met. The service life of the peristaltic pump is prolonged while the energy consumption is reduced, and the operation flexibility of the peristaltic pump is improved.

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 method for controlling left and right heart compaction degree before extracorporeal circulation operation, which comprises the following steps of: installing a peristaltic pump at a left and right heart inlet of an extracorporeal circulation device in an in-vitro environment; a liquid inlet of the peristaltic pump is connected with a liquid inlet pump, and a liquid outlet of the peristaltic pump is connected with a liquid outlet pump; and finally, a first pressure measuring structure and a second pressure measuring structure are arranged on the sides, away from the peristaltic pump, of the liquid inlet pump and the liquid outlet pump correspondingly, and the pressure of the liquid inlet pump and the pressure of the liquid outlet pump are adjusted to be-180 mmHg. The negative pressure of the liquid inlet pump is adjusted through the first pressure measuring structure, and the negative pressure of the liquid outlet pump is adjusted through the second pressure measuring structure, so that the purpose of quantifying the adjusting mode is achieved, the adjusting process for controlling the left and right heart compression degree before the extracorporeal circulation operation is visualized, the adjusting result is converted into the specific negative pressure values of the liquid inlet pump and the liquid outlet pump, and the accuracy of the operation is improved. The pressing degree reference for adjusting the left center and the right center is numeralized and standardized, the adjusting difference is avoided, experience and feeling are not needed, and the adjusting mode is fast and high in accuracy.

The present disclosure relates to systems, devices, and methods for automated fluid transfer. In an embodiment, the present disclosure relates to a system for fluid transfer between a fluid device and a cartridge for cell processing. The system comprises a first portion comprising an instrument head coupled to a gantry, the instrument head comprising a pneumatic actuator, a peristaltic pump, and a gripping feature for receiving the fluid device. The peristaltic pump may be configured to engage compressible fluidic tubing of a fluid pump module of the fluid device to transfer the fluid between the fluid device and the cartridge. The system further comprises a second portion comprising a docking station for receiving the cartridge. In some variations, movement of the pneumatic actuator relative to the fluid pump module causes occlusion of the compressible fluidic tubing of the fluid pump module by the peristaltic pump.

The invention discloses a device and a method for identifying a relationship between sediment bubble state methane and water body soluble methane. The device comprises a culture box, an acrylic column fixed in the culture box, a flux box hoisted at the top in the acrylic column, a gas analyzer communicated with the flux box through a circulating pipeline and a bubble blocking structure fixedly arranged in the middle of the acrylic column, and the side wall of the acrylic column is provided with an overflow port and is connected with a peristaltic pump through the overflow port and a pipeline; the input end of the water-gas balancing device is further connected with an inert gas supply tank, and the output end of the water-gas balancing device is connected with a gas analyzer. The method realizes simple and efficient control of a methane release path in the sediment, is helpful to identify the influence of the sediment on the methane release flux of a water-gas interface, and is expected to demonstrate that the water soluble methane mainly comes from sediment bubble release and to demonstrate that the water soluble methane is mainly from the bubble release of the sediment under the condition of considering the bubble state methane release. The methane release flux of the shallow water body is far greater than the diffusion release flux.