3734 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.

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 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 an intelligent thrombus suction and cutting system, and belongs to the field of medical instruments. According to the system, the design of double pressure sensors and the intelligent pressure feedback control technology are adopted, and the suction state (blood suction, thrombus suction or complete blockage) is accurately recognized by monitoring pressure changes in a negative pressure pump pipeline and a suction catheter in real time and combining historical data analysis. The system automatically adjusts parameters of a pipeline control valve, a negative pressure pump, a peristaltic pump and the like according to the parameters, and intelligent optimization control over the suction process is achieved. The innovative integrated design of the double-cavity catheter integrates the functions of suction and thrombus breaking, when the complete blockage state is judged, the thrombus breaking program can be automatically or manually started, thrombus is quickly broken through high-speed liquid impact or thrombolysis medicine injection, and long-time suction catheter blockage is effectively prevented. The system obviously improves the thrombus aspiration efficiency, reduces the blood loss amount of a patient, optimizes the operation process, and has a good clinical application prospect.

The invention discloses a method for preparing nano cerium oxide through supergravity reinforcement, which comprises the following steps: 1) completely dissolving cerium chloride hexahydrate serving as a cerium source with deionized water to prepare a cerium chloride solution; (2) inputting the cerium chloride solution into a supergravity reactor through a peristaltic pump at normal temperature, then inputting ammonia water into the supergravity reactor through a constant-flux pump, and carrying out premixing reaction in the supergravity reactor to form mixed slurry; and 3) after the premixing reaction is finished, taking out the mixed slurry, and carrying out suction filtration, washing, drying and high-temperature oxidation calcination to obtain the nano cerium oxide. According to the method, the production efficiency can be improved, the particle size of the prepared nano cerium oxide is small, the particle size distribution is narrowed, and the crystallinity of crystals is improved.

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.

A peristaltic pump, and related method, are disclosed that includes a cam shaft, a plunger-cam follower, a tube receiver, a spring, a plunger, a door, and a plunger lift lever. The cam shaft includes a plunger cam. The plunger-cam follower engages with the plunger cam of the cam shaft. The spring provides a bias and the plunger is biased toward the tube receiver by the spring. The plunger is coupled to the plunger-cam follower where expansion of the plunger cam along a radial angle intersecting the plunger-cam follower as the cam shaft rotates actuates the plunger away from the tube receiver. The door lever can be actuated between a first position and a second position. The plunger lift lever is coupled to the door lever to actuate the plunger away from the tube receiver when the door lever is actuated to the second position.

A user drives a plugging piece to open a water outlet through a driving piece, a water inlet buoy descends to a first preset height along with the height of the liquid level, water starts to flow out of a first water outlet and a second water outlet, water in the second water outlet flows through a foaming channel, and therefore foaming liquid and air are sequentially sucked into the water flow to form foam; and meanwhile, the plugging piece descends along with the liquid level to close the water outlet, the first water outlet supplements water in the water storage box until the water inlet buoy ascends to the second preset height along with the liquid level, the foaming water inlet valve is closed, and water discharging and foaming of the first water outlet and the second water outlet are stopped. Therefore, the device adopts a purely mechanical control foaming mode, a peristaltic pump and a power supply module thereof are not used, the production cost and the use noise are reduced, and the user experience is improved. Meanwhile, the foaming time can be changed by adjusting one or more of the flow of the first water outlet, the drainage flow of the drainage port and the capacity of the water storage box, and the diversified use requirements of users are met.

The embodiment of the utility model relates to the technical field of peristaltic pumps, in particular to a peristaltic pump which comprises a base. The extrusion assembly is arranged on the base; the elastic hose is arranged around the extrusion assembly, and the extrusion assembly is used for extruding the elastic hose in a clearance mode and pushing fluid of the elastic hose; the mounting assembly comprises a fixed seat, an adjusting part and a sliding seat, the fixed seat is fixed to the base, the sliding seat is slidably connected to the fixed seat, one end of the adjusting part is connected to the fixed seat, the other end of the adjusting part is connected to the sliding seat, the sliding seat corresponds to the extrusion assembly, and the adjusting part is used for pushing the sliding seat to slide relative to the fixed seat; when the sliding base is located at the first preset position, the extrusion assembly and the sliding base jointly clamp the elastic hose, and when the sliding base is located at the second preset position, a disassembly space is formed between the extrusion assembly and the sliding base. In this way, the peristaltic pump can improve the efficiency of replacing the spring hose.

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 belongs to the technical field of coating testing, and discloses a super-hydrophobic coating water impact resistance testing device which comprises a sample table, a water storage pond, a peristaltic pump, a buffer cup and a support, a sample is placed on a supporting seat of the sample table, the supporting seat is obliquely arranged and adjustable in angle, the sample table is placed in the water storage pond, the sample is located above the water storage pond, and the peristaltic pump is arranged on the supporting seat. The peristaltic pump is respectively connected with a water inlet pipe and a water outlet pipe, the peristaltic pump can pump water in the water storage tank into the water outlet pipe through the water inlet pipe, the buffer cup is arranged perpendicular to the sample table, the water outlet pipe is connected to the top of the buffer cup, the buffer cup can flow water to the top of a sample, and the buffer cup is arranged on the support in a position adjustable mode. The angle between the sample and the test water flow can be changed through the supporting seat, the water is recycled through the water storage tank, and the problem of water flow pulse generated by directly using the peristaltic pump is solved through the buffer cup.

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 utility model discloses a potassium iodide aerosol generating device which comprises a box body, a generating structure is installed in the box body, a feeding structure is installed on one side of the box body, and the generating structure comprises a driving part, two screw rods, two synchronous wheels, a synchronous belt, a lifting seat, a nozzle, a rotating motor, a vortex disc, a water tank, an exhaust fan and a material taking opening. The utility model relates to the technical field of potassium iodide aerosol, and has the beneficial effects that by adopting the generating structure and the feeding structure, during operation, a potassium iodide solution in the liquid storage tank can be fed into the nozzle through the peristaltic pump and is sprayed out through the nozzle; then, the rotatable vortex disc is matched to realize the potassium iodide aerosol generation operation, the generated potassium iodide aerosol can be fed into the collecting cavity to be collected and stored, meanwhile, the position of the nozzle can be adjusted through the matching of the driving part, the screw rod and the lifting seat, and the overall operation has the characteristics of simple structure, convenience in operation and adjustment and the like.

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 invention discloses a full-automatic pelletization coating system and method for small forage grass seeds, and particularly relates to the technical field of agricultural equipment.The full-automatic pelletization coating system comprises a rack, a controller, a pelletization coating device, a seed supply device, a powder supply device and a liquid supply device, and the pelletization coating device, the seed supply device, the powder supply device and the liquid supply device are in signal connection with the controller; both the seed supply device and the powder supply device are provided with vibration exciters capable of providing two vibration amplitudes, so that two blanking speeds, namely a fast blanking speed and a slow blanking speed, are realized, errors caused by materials in the air when a weighing hopper detects preset supply mass are reduced, and accurate supply of seeds and powder is achieved; the liquid supply device comprises a liquid medicine box, a clear water box, a proportional control three-way valve and a peristaltic pump, the liquid medicine box and the clear water box are connected with the peristaltic pump through the proportional control three-way valve, and the liquid medicine proportion can be accurately controlled by adjusting the opening degree of the proportional control three-way valve. According to the invention, the coating uniformity of small pasture seeds can be improved, the pelleting quality is enhanced, and the production efficiency is improved.

The invention relates to the technical field of peristaltic pump detection, in particular to a theoretical flow calculation method for a peristaltic pump. The method comprises the following steps: step 1, measuring the following parameters of the peristaltic pump: the inner diameter D of a pump shell, the inner diameter d of a hose, the wall thickness delta of the hose, the diameter R of a roller, the radius L of the circumference where the center of the roller is located and the rotating speed n of a motor; 2, the circular section of the hose is equivalent to a rectangle with the same area, the height of the rectangle is d, and the width h is equal to pi d / 4; 3, drawing the theoretical shape of the hose; 4, measuring the area of the internal area of the annular hose in the theoretical shape as an equivalent flow area S; and 5, calculating the theoretical flow of the peristaltic pump: V = n * S * h. The circular section of the hose is equivalent to a rectangle with the same area, so that the calculation precision of theoretical flow can be effectively improved, and the calculation precision is kept at about 90% or more than 90%.

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 an automatic tin soldering machine for a relay, which comprises a rack, and the rack is provided with a feeding mechanism, a tin soldering mechanism, a tin soldering mechanism, a tin soldering mechanism, a tin soldering mechanism and a tin soldering mechanism, the liquid pumping mechanism comprises a supply container and a peristaltic pump, the supply container is used for containing scaling powder, and the peristaltic pump is connected with the supply container to pump the scaling powder into the supply container; the tin furnace mechanism comprises a tin cup and a tin bath, the tin cup is located in the tin bath and connected with a first lifting air cylinder, and a liquid level detection probe is arranged above the tin bath; the washing mechanism comprises a cleaning water tank; the cooling and blow-drying device comprises an air knife which is connected with an air blower; the transfer mechanical arm comprises a portal frame, the portal frame is located above the machine frame, a three-axis moving module and a clamping jaw are arranged on the portal frame, the clamping jaw is installed on the three-axis moving module, and automatic high-precision soldering tin feeding can be achieved.

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.