135 results about "Burette" patented technology

The invention relates to a burette reading calibration method and device, experimental instrument equipment and a computer equipment storage medium. The method comprises the following steps: shooting a liquid level change image of the burette in real time by using a camera; the liquid level position is recognized from the liquid level change image according to the optical coding mark, and the lowest point of the liquid level concave surface and the corresponding observation reading are determined according to the liquid level position; calculating a relative position and a shooting angle between the camera and the burette according to the liquid level change image, camera parameters of the camera and instrument parameters of the burette; correcting the observation reading according to the refractive index parameter of the burette wall, the relative position and the shooting angle to obtain a calibration reading; burette reading information is generated according to the calibration reading, and the burette reading information is displayed at the liquid level position; according to the technical scheme, the teaching efficiency and effect of the titration experiment are improved.

The invention relates to a titration speed regulation device for drug inspection and analysis and a use method thereof.The titration speed regulation device comprises a speed regulation assembly, the speed regulation assembly comprises a transmission rod and a floating plate, the floating plate is arranged in a burette and slidably connected with the inner wall of the burette, a cover plate is arranged at the top end of the burette, and an operation cylinder is fixed to the top end of the cover plate; a connecting cylinder is fixed at the bottom end of the cover plate and detachably mounted at the top end of the burette in a threaded manner, a through hole is formed in the middle of the operating cylinder, the cover plate and the connecting cylinder in a matched manner, the central axis of the transmission rod and the central axis of the burette are positioned on the same straight line and are perpendicular to the floating plate, and the bottom end of the transmission rod penetrates through the through hole, enters the burette and is connected with the top end of the floating plate; a pressure supply assembly for supplying pressure to the transmission rod and the floating plate is arranged at the top end of the transmission rod, and a friction assembly for generating friction to the transmission rod in the titration process is arranged in the operation cylinder; the titration speed regulation control is realized, the use is convenient, and the analysis efficiency is improved.

The utility model relates to the technical field of potentiometric titration instruments, in particular to a potentiometric titration instrument with a burette monitoring device, which comprises a titration instrument body, a titration table is arranged at the upper end of one side of the titration instrument body, a placement groove is arranged in the middle of the right side of the titration table, and a clamping mechanism is arranged between the placement groove and the titration table; the sleeve is movably mounted in the middle of the left side of the titration table. During use, as the two sides of the first rack are meshed with the driving gear and the driven gear respectively, the driven gear is driven to rotate and controls the second rack on the other side to move in the opposite direction, the push rod is pushed through the connecting pieces on the two sides, and the push rod controls the first clamping plate to tighten the spiral spring; after being compressed, the spiral spring drives the second clamping plate to adaptively clamp the titration container, so that the titration container can be quickly clamped, and after an experiment is completed, the sleeve is reversed to reset the spiral spring, so that the second clamping plate can be loosened, and the operation is convenient during use.

The present invention belongs to the field of geological monitoring and discloses a device and method for observing the terminal channel of preferential seepage in large pores and constant water head in loess. The device comprises a camera, a funnel, foam glue, a first burette, a second burette, a three-way pipe for constant water head, a water bottle, a first iron stand, and a second iron stand. One end of the camera is fixed to the first iron stand. A permeable stone is set in the middle of the large opening of the funnel. The surface of the permeable stone is used to fix the original loess sample and the support tube. The space between the support tube and the loess sample is filled with foam glue. The first and third ends of the three-way pipe for constant water head are respectively connected to the water bottle and the first burette. The first burette and the second burette are connected by the second and third three-way pipes. Without disturbing the soil sample and with a fixed water head height, the terminal channel of preferential seepage in large pores and the water supply degree can be quickly observed. The work efficiency is high and the device is flexible and detachable. The device effectively solves the current problems of difficulty in capturing the preferential seepage large pore channels in loess and difficulty in measuring the water supply degree of original loess.

The utility model relates to the technical field of water-based acrylic resin detection, and discloses an automatic titration detection device for water-based acrylic resin, which comprises a detection base, a detection platform is mounted on the detection base, a titration bottle for mixing liquid is arranged on the detection platform, a burette is arranged on one side of the titration bottle, and the burette is connected with the detection platform. A plurality of clamp assemblies for fixing burettes are arranged on the detection platform; by arranging the shaking assembly and the driving assembly, after a titrant and a solution to be detected are put into a titration bottle, the titration bottle is put on the shaking assembly, and the shaking assembly can be rotated by starting the driving assembly, so that the fixed titration bottle also rotates, and two liquids in the titration bottle are shaken and mixed through rotation; by means of the arrangement, titration detection of the water-based acrylic resin can be completed, manual shaking mixing of detection personnel can be avoided, and damage caused by long-time wrist shaking is avoided.

The utility model particularly relates to a high-efficiency steam quality detection device which comprises a dryness and superheat degree detection device assembly, an air-cooled condensing device assembly and a non-condensable gas detection device assembly, the dryness and superheat degree detection device assembly comprises a steam guide four-way pipeline, a first pressure transmitter, a drain valve, a measurement four-way pipeline, a second pressure transmitter and a temperature sensor, and the air cooling condensation device assembly comprises an efficient condenser and an efficient cooling fan. The non-condensable gas detection device assembly comprises an air burette, a first electromagnetic valve, a first pressure differential sensor, a second pressure differential sensor, a condensate water burette and a second electromagnetic valve. The steam quality detection device has the advantages of high precision, high efficiency, high automation degree, capability of completely meeting the requirements of EN285 regulations on steam quality detection and the like.

This invention discloses an automated system and method for determining the trace total acid value of jet fuel. The system includes a sample moving unit, a titration unit, a nitrogen control unit, and a jet fuel total acid value determination unit. The sample moving unit moves the titration cup containing the sample below the titration unit. The nitrogen control unit maintains a nitrogen atmosphere inside the titration cup. The titration unit includes a porous burette, a burette tube, a photometric electrode, and a temperature electrode. The porous burette seals the titration cup. The titration unit injects titrant, mixed solvent, and mixed titration solvent into the titration cup, and determines the titration endpoint using the photometric and temperature electrodes. The jet fuel total acid value determination unit integrates the data from the titration unit to calculate the jet fuel total acid value. This invention eliminates endpoint errors that may result from subjective human judgment using manual indicators, and overcomes the need for machine vision technology, which requires the construction and intelligent training of a dataset of titration endpoint color images, in specialized instrument methods.

The utility model discloses a titration device for environmental protection detection, and relates to the technical field of titration devices, the titration device comprises a mounting base, one side of the surface of the mounting base is provided with a mounting groove, the interior of the mounting groove is fixedly provided with a control button, and the other side of the mounting base is welded with a support frame; a lifting mechanism is fixedly mounted in the middle of the surface of the mounting base, and a titration mechanism is arranged on the surface of the support frame. The control button is matched with the motor and the threaded rod, so that the lifting cylinder can drive the circular rail and the test tube placement rack to move up and down, test tubes on the surface of the test tube placement rack are convenient to approach burettes, dripped liquid is prevented from shifting, and meanwhile, the circular rail is matched with the rotating groove, so that the burettes can accurately drop into the test tubes; a connecting plate is arranged to be matched with a burette and a liquid storage tank, and meanwhile, a placement groove is matched with a standby liquid storage tank, so that the standby liquid storage tank can conveniently replace the liquid storage tank, and the convenience of the equipment is improved.

The utility model relates to the technical field of physical and chemical inspection, and discloses a titration assembly for physical and chemical inspection, which comprises a base, mounting plates are fixedly connected to the left side and the right side of the upper part of the base, a mounting groove is formed in the middle of the base, chutes are formed in the lower parts of the opposite sides of the mounting plates, and stirring assemblies are arranged in the chutes. And the upper parts of the opposite sides of the mounting plates are fixedly connected with electric telescopic rods, and the opposite sides of the electric telescopic rods are provided with mounting assemblies for mounting the titration assemblies. According to the titration assembly, through the cooperation of the valve, the burette, the conical flask, the magnetic stirring device, the magnetic stirring rotor, the air cylinder, the supporting plate and other structures, liquid medicine and titration liquid can be fully stirred when the titration assembly is used for detecting the phlegm reducing liquid medicine, and the accuracy of detecting the phlegm reducing liquid medicine is improved.

The utility model relates to the technical field of chemical experiment appliances, and discloses an adjustable titration volumetric burette stand, a fixing device is composed of a fixing cylinder, a sliding disc, a limiting column, a moving rod and a spring, the fixing cylinder is fixedly installed at the top of a connecting block, the sliding disc is slidably installed inside the fixing cylinder, and the limiting column is installed on the sliding disc. The limiting column is fixedly installed at the bottom of the sliding disc, the moving rod is fixedly installed at the top of the sliding disc, and the spring is connected to the surface of the moving rod in a sleeving mode. According to the adjustable titration volumetric burette rack, a hand wheel is rotated, under the action of a first bevel gear and a second bevel gear, a threaded rod can be rotated, under the action of a threaded sleeve, a connecting block can be driven to ascend and descend, a moving rod is pulled, a limiting column is separated from a limiting groove, a strip-shaped block slides to a proper position, then the moving rod is loosened, and under the action of a spring, the titration volumetric burette rack is fixed. And the limiting columns can enter the limiting grooves again, the strip-shaped blocks at different positions can be fixed, and adjustment is convenient and fast.

The utility model discloses an analytic titration device for medicine inspection, which relates to the technical field of medicine detection and comprises an operating frame and a rotating disc, the rotating disc is positioned inside the operating frame and is rotatably connected with the operating frame, a mounting frame is fixedly mounted at the bottom of the operating frame, and a motor is fixedly mounted at the bottom of the mounting frame. The transmission device has the advantages that the transmission shaft rotates with the disc as the center point, and rotates along the sliding groove formed in the rotating disc while rotating, so that the rotating disc is driven to rotate through operation of the transmission shaft and matching of the transmission shaft and the sliding groove; the burette above the beaker can be changed while the rotating disc rotates, so that the burette does not need to be disassembled and remounted, the problem of frequently replacing the burette is effectively solved, the operation sequence is simplified, the experiment failure caused by untimely titration is avoided, and the detection progress is improved.

The invention discloses a burette liquid level scale calibration machine and a quantitative scale calibration method thereof.The burette liquid level scale calibration machine comprises a rack fixed to the rear side of a workbench, a ball screw extending in the vertical direction is arranged in the middle of the front end face of the rack, and the upper end of the ball screw is driven by a servo motor; vertical guide rails are symmetrically arranged on the two sides of the ball screw, and the two ends of the rear side of the floating platform are supported on the vertical guide rails through guide sliding blocks and connected with the ball screw through screw nuts; the glass tube support is fixed to the workbench and used for supporting a glass tube. The code spraying device is mounted on the floating platform; and the injector is used for injecting purified water into the glass tube. The method comprises the steps that a first water inlet valve is opened, and purified water enters an injector; the second water inlet valve is opened, and water in the injector is injected into the glass tube to reach the initial water level; filling the injector; the servo motor drives the floating platform to ascend and descend, and the photoelectric switch stops when detecting the liquid level; spraying scale marks on the glass tube; and repeating the steps. The device is good in product quality and low in labor intensity.

The utility model discloses a water quality chemical oxygen demand tester, and belongs to the field of water quality sample detection, the water quality chemical oxygen demand tester comprises a detection rack, a sample rack and a sample test tube, the sample rack slides in the detection rack, and the detection rack is provided with a moving assembly used for driving the sample rack to move; a sample to be detected is contained in the sample tube, the sample test tube is placed in the sample rack, and a burette for titrating a reagent and a stirring device for stirring the mixed reagent in the sample test tube are arranged on the detection rack in a sliding manner. The method has the effects of improving the detection accuracy and improving the safety of workers.

This invention proposes an auxiliary device for accurate burette reading, comprising a clamping assembly with a clamping cavity formed within it for holding the burette. The clamping assembly has a first mounting position and a second mounting position, which are opposite to each other and respectively connected to the clamping cavity. An optical component is located at the first mounting position, comprising a magnifying element and a transparent lens. The transparent lens has graduations, and the magnifying element is located between the transparent lens and the clamping cavity. A color contrast element is located at the second mounting position. By clamping the burette in the clamping cavity at its liquid level, the reading at the burette can be magnified through the transparent lens and magnifying lens at the first mounting position. The second mounting position is opposite to the first mounting position, and the color contrast element at the second mounting position acts as a background to enhance color contrast, facilitating accurate burette reading.

The utility model discloses a novel acid-base titration device, which comprises a working table and a titration table placed on the working table, the working table is provided with a storage box and a liquid supplementing unit, the liquid supplementing unit comprises a base, a support rod, a suspension frame and a sliding rod, the base is fixedly connected with the working table, the support rod is vertically and fixedly connected with the base, and the suspension frame is fixedly connected with the sliding rod. The suspension is located at the top of the supporting rod and is adjustably and fixedly connected with the supporting rod in the vertical direction and the circumferential direction, the sliding rod is in axial limiting sliding connection with the sliding rod, a titrating solution storage bottle is hung at the end, facing outwards, of the sliding rod, and a bottle opening of the titrating solution storage bottle faces downwards and is fixedly provided with a liquid outlet valve. The burette disclosed by the utility model has the advantages that the situation that the burette is easy to break and damage due to manual liquid supplementation when the burette is taken in the prior art is avoided, meanwhile, the phenomenon that the titration liquid flows out due to manual instability is also avoided, and the detection efficiency is improved due to the fact that frequent taking of the burette is reduced and manual liquid supplementation is not needed.

The utility model discloses a chemical analysis and detection device for cement. The chemical analysis and detection device comprises an injection head, according to the cement chemical analysis and detection device, a concentric-square-shaped frame is fixedly installed on the upper portion of an L-shaped installation frame, an injector is placed on the inner side of the concentric-square-shaped frame, the injector is an existing injector, the concentric-square-shaped frame is provided with an injection mechanism corresponding to the injector, the liquid outlet end of the injector is fixedly connected with a liquid conveying hose, and the bottom end of the liquid conveying hose is fixedly connected with an injection pipe. The injection tube movably penetrates through the bottom edge of the L-shaped mounting frame and is fixedly connected with an injection head, a reaction flask is arranged below the L-shaped mounting seat corresponding to the injection head, the L-shaped mounting frame is matched with the concentric-square-shaped frame to mount the injector and the injection tube, and electric driving injection is performed through the injection mechanism, so that titration operation is performed. The burette does not need to be held by hand and a burette valve does not need to be operated for a long time, hand fatigue is reduced, meanwhile, continuous slow titration filling is formed, valve control is not needed, and titration operation is more convenient.

The utility model belongs to the field of laboratory burette racks, and provides a laboratory burette rack which comprises a base, two symmetrically arranged limiting rods fixedly connected to the upper surface of the base and two rectangular columns slidably connected to the surfaces of the two limiting rods, and the rectangular columns are provided with mounting assemblies used for mounting the rectangular columns on the limiting rods. A limiting assembly for limiting the burette is arranged on one side of the rectangular column; a burette is placed between the two arc-shaped rubber pads on the inner sides of the two rectangular rods, then the output end of the air cylinder is controlled to move outwards, the first rotating rod and the second rotating rod can be driven to rotate, the two rectangular rods are close to each other at the moment, and therefore the burette can be clamped by the two arc-shaped rubber pads; the burette can be further clamped by the other two arc-shaped rubber pads by repeating the operation, and compared with an existing burette bracket, the burette bracket disclosed by the utility model can be used for conveniently clamping burettes with different outer diameters, and is more convenient to use.

The utility model relates to the technical field of experimental appliances, in particular to a burette convenient to arrange, which comprises a burette main body and an adjustable structure, the adjustable structure is arranged at the position close to the lower end of the burette main body, and the adjustable structure can also comprise a connecting frame, a positioning component, a guide component and a rotating component. By pulling a positioning rod to move upwards, the positioning rod drives a rectangular frame to move along a sliding groove of a connecting seat, and the positioning rod drives a spring to stretch, so that the sliding groove corresponding to the corresponding rectangular frame moves along a connecting hole through a sealing block corresponding to a first guide groove, and a solution above a burette main body is sucked into the connecting hole; at the moment, the positioning groove is separated from the connecting frame, then the positioning rod is rotated by 180 degrees and then loosened, the elastic force of the spring drives the positioning rod to reset, the sealing block pushes out the solution in the connecting hole, the solution is dropped into the flask through the lower pipe, then the positioning rod is pulled to reset the positioning rod, and accurate dropping of the solution with the volume required by an experiment is achieved.

The present invention provides a 3A molecular sieve gas desorption amount determination apparatus, and relates to the field of gas measurement, the 3A molecular sieve gas desorption amount determination apparatus comprises a constant temperature water bath box and a room temperature water bath box, a thermal insulation plate is arranged between the constant temperature water bath box and the room temperature water bath box, the constant temperature water bath box is internally provided with a volumetric flask, the room temperature water bath box is internally provided with a burette, and the burette is connected with the thermal insulation plate. A first connecting pipe is arranged between the burette and the volumetric flask; a fan-shaped cover is arranged on a cover of the constant-temperature water bath box and is in contact with the volumetric flask; a first fixing structure is arranged on one side of the burette, a second fixing structure is arranged at the bottom of the volumetric flask, a comprehensive controller is arranged at one end of the burette, a liquid level meter and a vacuum pump are arranged in the comprehensive controller, and the liquid level meter and the vacuum pump are sequentially connected with the burette. According to the 3A molecular sieve gas desorption amount measuring device, an independent module experiment can be started, all modules can also be started at the same time for batch experiments, and operation is flexible.

The utility model belongs to the technical field of experimental instruments, and discloses a device for constant-temperature automatic titration, which comprises a constant-temperature box, an electronic thermometer, a magnetic suspension stirrer, a burette and a controller, and a constant-temperature temperature control element is arranged in the constant-temperature box; the constant-temperature control element, the controller and the electronic thermometer jointly form a constant-temperature system to ensure that the temperature of the solution is constant in the titration process. The burette controls the piston to move through the micro motor and the electric telescopic rod which can accurately control the speed, so that automatic titration is realized. A penetrating hole is formed in the top of the constant-temperature box and used for installing an electronic thermometer to monitor solution temperature in real time. The suspended magnetic stirrer is used for accelerating the reaction speed; the observation window is convenient for observing the reaction process. The automatic titration device solves the problem of inaccurate experimental results caused by temperature change of the conventional titration device, has the advantages of automatic titration, constant-temperature control, simplicity and convenience in operation and the like, and is suitable for titration experiments.

The utility model provides a titration device capable of being accurately controlled, which relates to the technical field of analysis and inspection and comprises a base, a bottom column, an upper column, a titration component and a micro peristaltic pump. According to the titration device capable of being accurately controlled, a titrated container is placed on the tray of the weighing instrument, and the weight change of the container and a solution in the container can be monitored in real time through the weighing instrument. Then, the flow of the titrating solution is set by adjusting the operation parameters of the micro peristaltic pump; at the moment, the micro peristaltic pump is started, the pump wheel rotates to drive the hose wound on the pump wheel to work, and the titrating solution in the burette is dripped into the reaction container at the set flow through the hose and the dripper. In the titration process, the weighing instrument monitors the weight change in real time, and an experimenter can adjust the flow and other parameters of the micro peristaltic pump at any time according to experimental data and titration conditions until the titration operation is completed. In the whole process, the flow of the titrating solution is directly controlled without depending on manual work, so that the error is greatly reduced, and the experiment accuracy is improved.

The utility model discloses a device for rapidly detecting the sulfur content of concentrate, which comprises a closed sulfur determination absorber, a knob at the lower end of the closed sulfur determination absorber is connected with an absorption liquid storage bottle, the upper end of the closed sulfur determination absorber is connected with a basic burette, and the basic burette is externally connected with a sodium hydroxide standard liquid storage bottle; a distilled water storage bottle for washing is externally connected to the joint of the closed sulfur determination absorber and the carbon determination furnace; one side of the carbon determination furnace is connected with a second drying tower, the bottom of the second drying tower is connected with a second gas washing bottle, the second gas washing bottle is externally connected with a first drying tower, the bottom of the first drying tower is connected with a first gas washing bottle, the first gas washing bottle is connected with a buffer bottle, and the buffer bottle is externally connected with an air pump. According to the utility model, the open sulfur determination absorber is replaced by the closed sulfur determination absorber, and the washing branch pipe is additionally arranged, so that the application range of a combustion neutralization method is expanded to the determination of sulfur with the content of 0.01-50%, and one set of equipment and one method can meet the requirements of multiple sulfur determination, thereby not only improving the accuracy of an analysis result, but also saving the cost.

The application discloses a kind of simultaneously determining the measurement system and method of soil water characteristic curve and unsaturated permeability coefficient, comprising: sample chamber, pressure chamber, water supply side, drainage side, manual valve, differential pressure gauge, solenoid valve, PC end and electronic scale.PC end is connected with electronic scale, for recording experimental data;Sample chamber is used to place sample, pressure chamber is used to place sample chamber and pressurization, drainage side and water supply side are each provided with three burettes, and are divided into standard burette and measuring burette, wherein standard burette applies variable head method to measure permeability coefficient in permeation experiment, measuring burette is used to measure the change amount of soil water volume, differential pressure gauge is used to measure the head pressure difference of standard burette and measuring burette and connect solenoid valve to realize the automatic control of soil water inlet and drainage.The application has the advantages that: water level is adjusted using solenoid valve, to realize the automation of measurement process;SWCC curve and permeability coefficient can be simultaneously measured;Instrument cost is low, and measurement result accuracy is higher.

The utility model discloses a resin solid content automatic titration analysis equipment, include: base, rotate and install the rotating lever on the top outer wall of base, install motor and install the container on the rotating lever top on the bottom inner wall of base, still include: install the controller on the one end of the top outer wall of base, the other end of top outer wall of base is equipped with the support, and the support one end is equipped with the burette, the burette outer wall is equipped with the electromagnetic valve. The utility model discloses a resin solid content automatic titration analysis equipment, through the synergistic effect of container rotation and stirring subassembly, eliminate titrant local concentration difference, ensure that the reaction is even, potentiometric electrode moves with reciprocating assembly dynamic, avoid local measurement deviation, improve the accuracy of potential monitoring, and each component and controller form closed loop control, and the titration and stirring parameters are automatically regulated, and the end point is accurately judged, reduces artificial error, realizes resin solid content efficient, accurate automatic analysis.

The embodiment of the utility model provides a titration device. The titration device comprises a reaction container, and a burette, a liquid blowing assembly and an electrode which are arranged above the reaction container, the reaction container is used for containing a solution to be detected, and the burette is used for adding a titrant into the reaction container; the liquid blowing assembly comprises a gas outlet part and is used for blowing gas to the liquid level of the to-be-detected solution through the gas outlet part, so that the titrant and the to-be-detected solution are uniformly mixed; the electrode is immersed in the solution to be measured and is used for measuring the potential change of the solution to be measured so as to determine a titration end point.

The utility model discloses a medicine detection titration device which comprises a burette, an adjusting mechanism is arranged on the outer surface of the rear end of the burette, an inspection cup is arranged at the lower end of the burette, and a clamping mechanism is arranged on the outer surface of the lower end of the inspection cup. The clamping mechanism comprises a base, a protection plate, a sliding groove, a first containing frame, a connecting rod, a sliding block, a first air cylinder, a groove, a clamping plate, an anti-skid plate, a second air cylinder, a guide plate and a guide groove. The adjusting mechanism comprises a fixing plate, a second containing frame, a U-shaped frame, a baffle, a motor, a limiting block, a limiting groove and a threaded rod. According to the medicine detection titration device disclosed by the utility model, the two groups of first placing racks can be conveniently moved and staggered for use, the inspection cups can be conveniently fed and discharged, the operation is simple, the second placing rack can be conveniently driven to stably lift, the height of the second placing rack can be conveniently adjusted as required, the U-shaped rack can be limited by the baffle, and the practicability is high. And a better use prospect is brought.

The utility model relates to an automatic liquid adding and zero setting device for an analytical test burette. The vacuum pump is communicated with a first valve port of the three-way valve through a negative pressure pipeline, a second valve port of the three-way valve is communicated with the atmosphere, a third valve port of the three-way valve is communicated with a first valve port of the three-way shunting device through a communicating pipe, one end of the liquid supply pipeline is communicated with the liquid inlet pipeline, and the other end of the liquid supply pipeline is communicated with the titrant storage bottle; the outer wall of the upper end of the liquid inlet pipeline is hermetically connected with the second valve port of the three-way shunting device, the lower end of the liquid inlet pipeline penetrates through and is connected to the outer end of the third valve port of the three-way shunting device and extends into the burette, and a gap is reserved between the lower end of the liquid inlet pipeline and the inner wall of the three-way shunting device. Compared with the prior art, the automatic zero setting of the burette is realized, manual adding once every titration is not needed, the time is reduced from about 20 seconds of manual standard solution adding for zero setting to about 2 seconds of automatic zero setting at present, the titration efficiency is improved, the error probability in the production process is reduced, meanwhile, the reagent waste is avoided, and the cost is saved.

The utility model relates to an EDTA titration detection device, and relates to the technical field of cement content detection.The EDTA titration detection device comprises a base, a titration assembly and a control assembly, the titration assembly comprises a conical flask and a burette, and the conical flask is arranged on the base; the burette is detachably connected to the base and is positioned above the opening end of the conical flask; a piston is arranged on the burette; the control assembly is arranged on the piston and is used for controlling the titration amount of the burette. The method has the effect of improving the accuracy of the detection result.

The utility model provides a kind of titration device for drug research and development, it is related to the field of pharmaceutical processing equipment, it includes: bottom plate, bottom plate top is used to place conical flask;Stand, bottom plate top is equipped with stand, stand one side is equipped with mounting ring, for the clamping fixation of burette;Clamping assembly, clamping assembly is equipped on the inner wall of mounting ring, for the clamping fixation of burette;And mixing assembly, mixing assembly is equipped on the top of bottom plate, for the mixing of conical flask.This kind of device cooperates through the synergistic effect of clamping assembly, realizes the real-time posture fine adjustment and self-adaptive clamping of burette, adjusts motor based on gyroscope feedback data dynamic control mounting ring angle, offset caused by compensating external force disturbance, ensure that burette is always in vertical equilibrium state;The integrated design of mixing assembly in combination with antiskid component improves the mixing efficiency and fixed safety of reaction vessel.

The utility model provides a valve control system for pipette device belongs to digital titrator technical field, including burette and the integrated seat of burette below, be equipped with piston in burette, the integrated seat is equipped with the flow channel of reagent bottle inside intercommunication, and the integrated seat includes the horizontal check valve of the communication with the outlet pipe, the vertical check valve of the communication with the inlet pipe and is used for switching burette intercommunication flow channel, horizontal check valve or the reversing valve of vertical check valve, horizontal check valve includes first valve seat, first valve ball and elastic member of abutment in proper order, first valve seat is equipped with first through -hole of the intercommunication reversing valve and outlet pipe, first through -hole passes through first valve ball seal, the other end of elastic member is fixed with the shell of outlet pipe, the utility model discloses through the setting of elastic member in horizontal check valve, makes the piston to move up and suck reagent, the liquid and air in guide pipe will not be sucked into burette.