34results about How to "Reduce cross contamination" patented technology

This application discloses an integrated cleaning device, relating to the field of cleaning equipment, comprising a frame; a loading rack installed at one end of the frame; a unloading rack installed at the other end of the frame; a transfer mechanism installed on the frame and used for transferring optical components; a hydrocarbon cleaning unit installed on the frame and adjacent to the loading rack, the hydrocarbon cleaning unit being used to clean optical components using hydrocarbon solvents; and an HFE cleaning unit installed on the frame and adjacent to the unloading rack. This application reduces the footprint by integrating the hydrocarbon cleaning unit and the HFE cleaning unit onto the frame; it reduces mutual interference and improves safety by physically isolating the hydrocarbon cleaning unit and the HFE cleaning unit with partitions; and it prevents large amounts of hydrocarbon solvent from entering the next process by using air knife purging, greatly reducing the contamination load of subsequent HFE solvents and minimizing cross-contamination.

The utility model provides a high-melting-point graphite pipe for elemental analysis, which belongs to the technical field of spectral analysis and comprises a circular hollow graphite pipe main body and transverse support parts symmetrically arranged on two sides of the graphite pipe main body, an inner pyrolytic carbon layer is deposited on the inner wall of the graphite pipe, a porous structure is arranged in the inner pyrolytic carbon layer, and an outer compact pyrolytic carbon layer is further deposited on the surface of the inner pyrolytic carbon layer. Through the inner pyrolytic carbon layer and the outer compact pyrolytic carbon layer, in the high-temperature working process, the inner wall pyrolytic carbon layer can be selectively consumed to form a compact glassy carbon film, a self-adaptive protection mechanism enables the graphite tube to still keep stable analysis performance under extreme conditions, reaction or permeation of a detected element and graphite at high temperature is reduced, and the analysis accuracy of the graphite tube is improved. The phenomenon of cross contamination is reduced, the memory effect of the graphite pipe is reduced by 70%, but the memory effect of a traditional pyrolytic graphite pipe can only be reduced by 30-40%, and the graphite pipe is particularly suitable for analysis of high-melting-point elements.

The present disclosure relates to the technical field of insulation board production, and one embodiment of the present disclosure provides a multi-channel batching machine for insulation board production, which comprises a bottom plate, a main frame, a fixed sleeve and a rolling tank. The main frame is fixed on the bottom plate, the fixed sleeve is fixed on the main frame, the rolling tank is horizontally rotatably connected at one end of the fixed sleeve, a feeding assembly is arranged on the fixed sleeve, a stirring assembly is arranged in the fixed sleeve and the rolling tank, and a discharging assembly is arranged on the rolling tank and the bottom plate. The feeding assembly comprises a plurality of feeding pipes, the feeding pipes are fixed at the bottom of the fixed sleeve, conveying augers are arranged in the feeding pipes, and feeding hoppers are arranged at the top of the feeding pipes. Through the above technical solution, the technical problem of low feeding efficiency, different raw materials needing to be put in at different times, and prolonged batching period in the prior art is solved, which particularly affects the overall processing efficiency in large-scale production.

This utility model relates to a modular spray granulation drying chamber that is easy to clean, belonging to the field of spray granulation drying technology. It includes a mounting frame, a support frame fixedly connected to the top of the mounting frame, a feeding chamber on the top of the support frame, an outer shell on the top plate of the mounting frame, an inner barrel inside the outer shell, and a connecting barrel fixedly connected to the mounting frame, with the top of the connecting barrel fitting snugly against the bottom of the inner barrel. By using the mounting frame, support frame, feeding chamber, outer shell, inner barrel, motor, bidirectional threaded rod, and threaded block in coordination, the drying chamber of the spray granulation dryer can be quickly cleaned, significantly improving cleaning efficiency, shortening downtime, and allowing for thorough cleaning of the drying chamber without dead corners, reducing cross-contamination, thereby reducing the risk of material residue, ensuring product quality, extending equipment life, and reducing maintenance costs.

The utility model relates to food detection technical field discloses a food detection sample rack, including storage box, multiple storage compartments are equipped with in storage box equidistance, the pullable frame body is equipped in storage compartment, and the frame body is U type structure, is equipped with the transverse plate on the frame body, multiple placing holes are equipped with equidistance on the transverse plate, and the fixed assembly is connected at the placing hole, the fixed assembly includes two symmetrical settings adjusting plate, and the vertical board is symmetrically equipped with on the transverse plate one side at the placing hole, and the two vertical boards are rotatably connected with bidirectional screw rod, and the one end of bidirectional screw rod extends to one of vertical board one side and is connected with knob, and the connecting plate is connected on the adjusting plate, and the connecting plate one end is with bidirectional screw rod screw connection, and the clamping plate is equipped with on the adjusting plate through a plurality of springs. The setting of fixed assembly, drive the interval of two clamping plates through bidirectional screw rod, realize the fixed clamping test tube of different size, ensure its security of storage.

This invention relates to the field of laboratory analytical instrument technology, specifically to a water bath nitrogen blowing device, comprising a water bath nitrogen blowing instrument, a drain pipe fixedly connected to one end of the drain pipe, and a wastewater tank fixedly connected to one end of the drain pipe. A protrusion is fixedly installed inside the wastewater tank, and the protrusion has multiple sets of first straight grooves, inclined grooves, and second straight grooves. A hydraulic rod is installed at the upper end of the wastewater tank, and a fixed box is installed at the power output end of the hydraulic rod. Multiple sample collection tubes are installed inside the fixed box for sampling wastewater. Each sample collection tube has a sliding sealing rod slidably connected inside, and a sliding ball is fixedly connected to one end of the sliding sealing rod. The sliding ball is slidably connected to each of the first straight groove, inclined groove, and second straight groove. This device can automatically sample wastewater at different depths when sampling and testing is required.

This utility model discloses a fully automatic tea rolling machine for automatically turning and evenly distributing tea leaves, relating to the technical field of tea rolling machines. It includes a support platform with three rotating cranks, a stainless steel rolling drum connected to the three rotating cranks, a lid lifting assembly on the drum, and a stainless steel rolling disc on the support platform. Friction rings are installed through each of the three rotating cranks. In this invention, the limiting rollers limit the heightening rings, causing them to drive a cleaning mechanism to rotate stably. A shovel lifts edge tea leaves, a cleaning brush disperses the leaves, and an electronic fan blows the leaves towards the center area, achieving automatic leaf turning and even distribution during the rolling process. This effectively solves the problem of uneven rolling caused by tea leaf accumulation at the edges in traditional rolling machines, reduces cross-contamination caused by untimely or incomplete manual cleaning, and improves production efficiency.

The utility model relates to industrial automation technical field discloses an industrial standard gas automatic proportioning device, including the cabinet body, the cabinet body inside is physically divided into the gas confluence area of upper part and the electrical control area of lower part, be provided with a plurality of parallel gas treatment branch in the gas confluence area, operation and display panel, set up in the front side of electrical control area, mixer, including outer mixing cylinder and inner mixing cylinder, the lateral wall of outer mixing cylinder is set up with a plurality of communicating holes, a plurality of communicating holes with the export of a plurality of gas treatment branch are linked, back pressure regulating valve, its installation in the export of outer mixing cylinder, in the utility model, through setting back pressure regulating valve, the working environment of core flowmeter is stabilized, and the proportioning precision is promoted, simultaneously, the safety interlock design of its normally closed valve, cooperate electrolytic polishing pipeline and metal face seal joint, on the basis that realizes active safety protection, guarantees the high purity of mixed gas again.

The utility model discloses a screening device for high purity alumina research, which comprises a mounting rack, the top end of the mounting rack is fixedly connected with a filter box, the top end of the filter box is sleeved with a primary filter frame, the tops of the two sides of the filter box are provided with switch seats, one end of the mounting rack is fixedly provided with a connecting plate, and the other end of the mounting rack is provided with a secondary filter frame. And a screening mechanism is installed on the connecting plate, a flow guide plate is connected to the bottom end of the mounting frame, and a collecting frame is arranged below the mounting frame. According to the screening device for high-purity aluminum oxide research, due to the multi-stage screening structure of the device, an operator only needs to add high-purity aluminum oxide materials into the primary filtering frame at a time, after the device is started, all screening parts work cooperatively, and the multi-stage screening process is automatically completed. Materials sequentially pass through different filter screens in the device, products with different granularities can be obtained without manual intervention, an operator does not need to repeatedly replace equipment or the screens, the operation steps and time are reduced, and the research process is accelerated.

The utility model relates to the field of sewage treatment, in particular to a convenient-to-clean combined type sewage treatment biochemical pool which comprises a pool body with an opening in the top, the pool body is communicated with a blow-off pipe, a blow-off valve is arranged on the blow-off pipe, and a partition plate dividing an inner cavity of the pool body into an anaerobic cavity and an aerobic cavity is placed in the pool body. A primer pump used for communicating the anaerobic cavity with the aerobic cavity is arranged outside the tank body, a telescopic groove is vertically formed in the inner side wall of the tank body, the partition plate extends into the telescopic groove and is tightly attached to the telescopic groove, a plurality of supporting rods are hinged to the side, located in the telescopic groove, of the partition plate, and the supporting rods slidably penetrate out of the tank body; a compensation groove is vertically formed in the other side, opposite to the telescopic groove, of the inner wall of the pool body, and a compensation insertion plate is vertically inserted into the compensation groove in a matched mode and is inserted into the partition plate in a matched mode. The cleaning device has the advantage of improving the cleaning efficiency.

The utility model discloses a kind of denture is used to oral impression protection device, including the protective box with top being open, the protective cover of open shielding sealing is arranged in protective box top, and protective cover is detachably arranged, the protective box and protective cover are prepared using heat preservation, light shielding material, the storage cylinder is installed in the inboard of protective box, the storage cylinder side is equipped with several air vents. The denture is used to oral impression protection device, by storing oral impression in the sealed environment of heat preservation and protecting it, reduce the influence of external environment temperature to oral impression, while dry agent is arranged in protection device, for dehumidification, avoid oral impression to be influenced by temperature and humidity and appear discoloration, softening etc., the influence of external force to oral impression can be also reduced by the protection device, avoid oral impression to be stressed deformation even breakage in storage or transportation process, oral impression is better protected.

This utility model discloses a detachable aseptic spray drying collection device, relating to the field of spray drying material collection technology. It includes a bottle body with a sealing valve at the top. By fitting the outer wall of a sealing sleeve onto the inner wall of a feed column, the ring plate fixed to the outer wall of the sealing sleeve engages with the inner wall of the ring groove. This allows workers to quickly seal the bottle body using the sealing valve, separating the device from the feed pipe, effectively isolating airflow, significantly reducing material volatilization, dispersion, and moisture absorption during collection and transfer, improving yield, and reducing environmental and cross-contamination. By matching the inner wall of the sealing valve with the outer wall of the sealing ring, the inner wall of the sealing valve abuts against the top of the bottle body. A support plate slides on the outer wall of the bottle body until its top abuts against the bottom of the sealing ring, facilitating control of the sealing valve's sealing of the channel between the bottle body and the feed column to prevent material overflow from the bottle body.

The utility model discloses a double -end rod cover sampling detection integration device, including collection detection rod and double -end rod cover, and collection detection rod includes the rod body, middle cover, sampling rod who is detachably assembled as an organic whole in proper order, and double -end rod cover includes the first cavity and the second cavity who do not communicate with each other, and the sampling column of sampling rod is detachably inserted into the first cavity, and the second cavity is by sealed liquid storage cavity and one end opening's sampling cavity is composed, and is sealed through the sealing film between, and the sealing film can be sampled column puncture, and sampling rod is equipped with liquid channel, and the middle cover is equipped with the liquid guide channel and the rod body assembly cavity who communicate, and the liquid channel and liquid guide channel communicate, and the rod body is inserted into the rod body assembly cavity, and is equipped with detection channel and test strip in the rod body, and the entrance of detection channel communicates with the rod body assembly cavity of middle cover. The utility model realizes sampling detection two in one, and the step of additional liquid transfer, mixing, sampling detection again after specimen collection is not needed, reduces the cross -contamination in the operation process, and the operation is simple and convenient.

The application discloses a kind of extraction detection methods of multiple organic pollutants in soil, which comprises the following steps: weighing soil sample is filled in extraction pool, and carries out fast solvent extraction process, and extraction liquid is collected in collection bottle;Extraction liquid is concentrated on rotary evaporator under reduced pressure, and is washed and purified in chromatographic column, and after all the eluate is collected in flat-bottomed flask, it is concentrated under reduced pressure on rotary evaporator;Part of the concentrated liquid is centrifuged, then nitrogen is blown, and after blowing dry, constant volume is added to methanol phase, and internal standard indicator is added, and UPLC-MS is used for detection;Part of the concentrated liquid is nitrogen blown, and after blowing dry, constant volume is added to ethyl acetate phase, and internal standard indicator is added, and GC-MS / MS is used for detection;The standard curve of target compound is quantitatively analyzed by internal standard method.The application has good matrix applicability, method universality and analysis flux, and can provide reliable technical support for comprehensive and accurate evaluation of soil complex pollution and ecological environment risk.

A fluid system, a biochemical analysis detection platform, and a fluid handling method are disclosed. The fluid system includes one or more first main flow paths (L6) configured to connect to a reagent storage chamber; a second main flow path (L1); a reaction flow path including a flow cell (C1); a bypass flow path (L5) connected in parallel with the reaction flow path; a third main flow path (L4); one or more branch flow paths; a first switching component (T1) connecting one or more first main flow paths (L6), the second main flow path (L1), and at least one branch flow path, such that any two different types of flow paths are connected while the remaining flow paths are disconnected; a second switching component (T2) connecting the second main flow path (L1), the reaction flow path, and the bypass flow path (L5), such that any two flow paths are connected while the remaining flow paths are disconnected; and a third switching component (T3) connecting the third main flow path (L4), the reaction flow path, and the bypass flow path (L5), such that any two flow paths are connected while the remaining flow paths are disconnected.

This invention discloses a solution processing device based on negative pressure filtration and solid-phase extraction (SPE). It solves the technical problems of separate processing of the test solution using SPE and filtration, which leads to increased purification costs and lower purification efficiency. It also addresses the issue that existing SPE instruments use a negative pressure space throughout the container, resulting in uneven negative pressure on each liquid guide tube, causing inconsistent separation speeds and even incomplete separation of some liquids. The device includes a filter cup support platform, a sample tray, a vacuum pump, a filtration assembly, and a sealing assembly. By placing the solid-phase extraction resin and the filtration assembly at the bottom of the solution container in the filter cup, negative pressure filtration of the sample solution and solid-phase extraction separation of interfering substances can be achieved simultaneously, minimizing separation steps, shortening purification time, and improving purification efficiency.

This utility model belongs to the field of titration technology, specifically a titration device for producing aluminum hydroxide adjuvant, including a base; a rotating seat is rotatably connected to the top of the base; a placement groove is opened in the middle of the rotating seat; a titration cup is installed in the middle of the placement groove; a support rod is rotatably connected to the middle of the base; the support rod passes through the middle of the rotating seat; a fixing ring is fixedly connected to the middle of the support rod; the fixing ring is fixedly connected to the top of the support rod; an elastic clamping plate is fixedly connected to the middle of the fixing ring; a burette is installed in the middle of the elastic clamping plate; a quantitative component is provided in the middle of the burette; and a stirring component is installed in the middle of the support rod. Through the above structure, the titration cup can be quickly clamped and positioned, the clamping force or range can be adjusted, it is compatible with titration cups of various sizes, and the clamping force can be automatically adjusted according to the outer diameter of the beaker, ensuring a tight fixation even for beakers of different sizes.

The utility model discloses a vacuum filtration blowback device and a vacuum dryer, which belong to the technical field of chemical equipment and comprise a gas pipeline module and a filtration module, the gas pipeline module comprises a main gas pipeline and two auxiliary gas pipelines; the bottom of the gas main pipeline is inserted into the filtering module; one ends of the two auxiliary gas pipelines are communicated with the main gas pipeline, and the other ends are respectively communicated with the vacuum pump and the gas source; and a valve is arranged at the other end of each gas auxiliary pipeline. According to the utility model, the valve is arranged on the vacuumizing pipe, so that the pressure drop loss is reduced, the back flushing effect is improved, the gas pipeline module and the filtering module of the vacuum filtering and back flushing device are convenient to disassemble and assemble through the modular design, and the cleaning difficulty of the filtering module and the operation difficulty in the equipment maintenance process are reduced.

The application relates to the field of semiconductor wafer polishing, in particular to an interactive device for polishing silicon wafers, which comprises a fixing base, a carrier mechanism and a polishing head mechanism; a partition mechanism, which comprises a baffle plate, the baffle plate is located in a containing space, and the baffle plate is slidably connected to the fixing base along a first direction; when the polishing head is in a first state, the baffle plate is arranged on the side of the polishing head; when the polishing head is in a second state, the baffle plate is arranged directly below or on the side of the polishing head; and a cleaning mechanism, which is located on the side of the containing space, and the cleaning mechanism has at least a first mode and a second mode; in the first mode, the baffle plate is arranged between the polishing head and the carrier, the cleaning mechanism enters between the polishing head and the baffle plate and cleans the polishing head; and in the second mode, the cleaning mechanism is not in action. The technical problem that the silicon wafers are easily contaminated during the interaction process is solved, and the technical effect of reducing the contamination of the silicon wafers during the interaction is achieved.

The invention discloses an integrated micro-fluidic metasurface chip for real-time detection of exosome (POCT). The chip is formed by bonding a micro-fluidic structure layer and an optical sensing substrate layer, and sequentially comprises a sample / buffer solution converging region, a gradient film pretreatment region, a snake-shaped mixing region, a micro-column enrichment region and a multi-channel super-surface detection region in the flow direction. The coarse filtration membrane and the fine filtration membrane realize graded removal of cell debris and platelets, and are matched with a back-flushing structure to reduce blockage of the filter membranes; the microcolumn array is modified by a general exosome antibody and is used for efficient immune enrichment and mild washing or elution of exosome; the multi-channel metasurface array is used for respectively fixing different disease-related probes and carrying out high-sensitivity parallel optical detection on multiple markers of exosomes. According to the present invention, the single-chip integration of exosome pretreatment, enrichment and detection is achieved, the sample loss is reduced, the detection sensitivity and the flux are improved, and the method is suitable for the POCT application scenarios such as tumor early screening. Figure 1 is a structural diagram of the integrated micro-fluidic metasurface sensing chip provided by the invention.

This utility model discloses a fully automated biochemical analyzer, including a biochemical analyzer body. A top cover is rotatably connected to the top of the analyzer body. Mounting plates are symmetrically fixed to one side of the top cover. A collection tube is fixedly installed between the two mounting plates. A water inlet pipe is fixedly installed to one side of the collection tube. Multiple diverter heads are installed on one side of each collection tube, and a spray head is fixedly installed at the bottom of each collection tube. This design, by setting up a collection tube, water inlet pipe, diverter heads, spray heads, and ultraviolet disinfection lamp, uses the water inlet pipe to transmit water through the collection tube to the interior of the diverter heads. The spray heads spray disinfectant water onto the top of the partition, disinfecting the interior of the biochemical analyzer body. The ultraviolet disinfection lamp then dries and disinfects the disinfectant water, effectively reducing cross-contamination between samples, ensuring the independence of each sample, and avoiding misdiagnosis or missed diagnosis due to contamination.

The utility model relates to the production technical field of enzymolysis extraction product, and disclose material cooking transportation production line, feeding frame, the top of feeding frame is provided with electric hoist through the installation of running frame, and electric hoist is connected with hopper trolley through sling, one side of feeding frame is provided with cooking pot, and the feeding mechanism for cooperating with the top of cooking pot is set up on the feeding frame, and the discharge outlet of cooking pot is connected with sanitary pump through pipeline, the discharge outlet of sanitary pump is connected with storage tank through pipeline, the discharge outlet of storage tank is connected with screw pump through pipeline, and the discharge outlet of screw pump is connected to the next production workshop through pipeline. Compared with traditional completely manual handling feeding, the electric hoist bears the main material lifting work, and the operator only needs to carry out a small amount of auxiliary operation, thereby reducing the physical and mental load of workers, and improving the safety during production.

This utility model relates to the field of modern agricultural equipment technology and discloses an easy-to-clean agricultural medicine container, including an outer container, an inner container body, a positioning ring fixedly connected to the outside of the outer container, and a fixing ring fixedly connected to the outside of the medicine container body. Pull rings are fixedly connected to the upper circumference of the fixing ring, and mounting posts are fixedly connected to the lower circumference of the fixing ring. Multiple mounting posts are slidably connected inside the positioning ring, and movable blocks are slidably connected to the inner circumference of the positioning ring. Insert rods are fixedly connected to one side of each movable block. This utility model facilitates easy disassembly of the medicine container body, allowing for thorough cleaning of both its inner and outer surfaces, removing stubborn residues and pesticide residues. It also facilitates cleaning of the interior of the medicine container body, reducing the risk of cross-contamination and reducing manual labor intensity.

The utility model discloses a high pressure gas separation device relates to gas separation technical field, including processing jar, the top of processing jar is provided with the jar cover, the inner wall both sides of processing box all are provided with the limit sliding block, and the limit sliding block both sides of two all are provided with the clamping groove in and are provided with the breathable net in. The utility model discloses through starting high pressure pump and compressing gas to the inside bottom side of processing jar, and gas will pass through two groups of adsorption membrane, and the first group membrane preliminary intercepts macromolecular impurity, and reduces the follow -up membrane layer load, and the second group membrane further selectively adsorbs target gas, and improves separation purity, and two groups of membrane series connection or parallel connection design, and share high pressure impact to prolong life, and reduce cross -contamination, and finally output high -purity gas and reduce maintenance cost, and through the limit sliding block and the sliding slot that are equipped with can take out adsorption membrane from processing jar, in addition, the adsorbent is placed in the inner wall of sliding block, and through the breathable net can adsorb the gas peculiar smell in processing jar.

The utility model relates to 3, 5 -dimethylbenzoic acid processing technical field, especially a kind of centrifugal separator for 3, 5 -dimethylbenzoic acid, including base, shell is installed on base, the inside of shell is provided with inner shell, the inside of inner shell is provided with centrifugal barrel, driving motor is installed on the outer wall of shell, drive shell is provided with feed pipe, spiral thread is provided on the outer wall of centrifugal barrel, a plurality of through holes one are seted up on inner shell, a plurality of through holes two and through hole three are seted up on centrifugal barrel, liquid discharge pipe is communicated in the bottom of shell, solid discharge port is seted up in the side of liquid discharge pipe, the inside of centrifugal barrel is provided with baffle. The utility model can realize the insoluble impurity in solution high efficiency removal, promote the purity of product, through centrifugal separation, solid particle can be precipitated and separated quickly, to reduce the cross contamination of solubility material and impurity, help to improve separation efficiency, save time and resources, effectively improve the economy of production.

The utility model discloses a kind of salted egg surface film covering fresh-keeping devices, including film covering structure, the film covering structure includes arc-shaped soaking pool, and the inside of soaking pool is divided into six soaking grooves by partition, and the top of the left and right side walls of each soaking groove is equipped with bracket, and the bottom of bracket is equipped with ultraviolet lamp, and soaking pool is installed in the inside of shell, and rotating shaft is rotatably installed between the left and right inner side walls of shell, and six groups of salted egg pushing structure are respectively installed in the position of rotating shaft corresponding six soaking grooves, and speed reducer motor is also installed on shell, and the output shaft of speed reducer motor is connected with rotating shaft;The device can realize the batch processing of film covering fresh-keeping of multiple salted eggs in different soaking grooves simultaneously by setting multiple small soaking grooves in soaking pool, while the cross contamination between salted eggs can be reduced, and ultraviolet lamp is arranged above each soaking groove, so that the soaking liquid and salted egg can be sterilized and disinfected during the salted egg film covering process, to effectively prevent the soaking liquid from being contaminated.

This utility model relates to the field of edible blended oil blending technology and discloses an edible blended oil blending device, including: a blending tank, the top of which is equipped with a sealing cap, and two stirring components rotatably installed inside the blending tank; a cleaning component, which includes a stirring rod rotatably installed inside the blending tank and a toothed disc rotatably installed inside the cavity, the top of which passes through the sealing cap and is connected to the toothed disc, and cleaning scrapers are installed on both sides of the two connecting plates, which can effectively remove accumulated grease, ensure the safety of edible oil, thereby improving the thoroughness of blending of edible blended oil, so as to improve the blending efficiency of edible blended oil, while ensuring efficient operation of the equipment, improving production efficiency, extending equipment life, helping to prevent corrosion and wear of the blending tank, extending the service life of the blending device, and reducing the cost of maintenance and replacement of the device.

This invention relates to a europium-cerium flow battery electrolyte and its preparation method, belonging to the field of flow battery technology. The negative electrode electrolyte comprises europium salt and additives, while the positive electrode electrolyte comprises cerium salt and additives. The additives include phosphate-containing chelating agents and supporting and auxiliary electrolytes. The chelating agents provided in this invention have large molecular weights, avoiding cross-contamination caused by active ions crossing the membrane. Furthermore, the additives at both ends are identical, resulting in essentially consistent viscosity of the electrolytes at both electrodes, which helps maintain the consistency and stability of conductivity, allowing for more uniform electrochemical reactions within the battery. As a novel type of flow battery, the europium-cerium flow battery has a higher voltage window, thereby improving the battery's energy density and power density. Moreover, the combination of europium and cerium ions with chelating agents further enhances the redox kinetics, showing broad application prospects in new energy vehicles.

This utility model discloses a rice bran screening device for rice production and processing, including a screening box. A feeding pipe is provided on the top of the screening box, and a feeding control structure is provided inside the feeding pipe. A multi-layer air blowing pipe group is provided inside the screening box and on one side of the feeding pipe. A rice bran collection chamber and a rice grain collection chamber are formed inside the screening box. Two sets of mounting edges are symmetrically arranged inside the rice grain collection chamber. A vibrating screen is provided on the mounting edges, and a vibrating motor is provided on one side of the bottom of the vibrating screen. An elastic support structure is provided between the vibrating screen and the mounting edges. A discharge port is opened on the side wall of the screening box, and the vibrating screen extends to the outside of the discharge port. A slag collection chamber is formed below the vibrating screen. A slag discharge pipe is provided at the bottom of both the rice bran collection chamber and the slag collection chamber. This utility model can improve the screening effect of rice bran and broken rice in rice and achieve stable separation.

The utility model provides a gas chromatography liquid sample injection needle anti-bending device and gas chromatography liquid sample injection needle wherein the gas chromatography liquid sample injection needle anti-bending device comprises a connecting assembly and a telescopic sleeve, one end of the connecting assembly is connected with the telescopic sleeve, the other end of the connecting assembly is connected with the sample injection needle, and the telescopic sleeve is connected with the sample injection needle. The telescopic sleeve is arranged on the periphery of the sample injection needle in a sleeving manner, the telescopic sleeve and the sample injection needle are arranged at an interval, and the telescopic sleeve can stretch out and draw back in the direction parallel to the long axis of the sample injection needle. According to the anti-bending device for the gas chromatography liquid sample injection needle, the telescopic sleeve arranged on the periphery of the sample injection needle in the sleeving manner can freely stretch out and draw back in the long axis direction in the sample injection process, and the bending risk of the needle head caused by lateral stress can be reduced. When a needle head punctures the isolation pad, the sleeve shrinks to provide axial supporting force, and external impact is dispersed; after puncture is completed, the sleeve resets to wrap the needle head, accidental collision is avoided, the probability of breakage of the sample injection needle is reduced, the service life is prolonged, and the use cost is reduced.