179 results about "Burette" patented technology

The invention relates to the field of automatic shaking devices, and discloses a novel conical flask automatic shaking device, including a burette, wherein the outer surface of the side end of the conical flask is provided with a fixed clip and a movable clip. The conical flask automatic shaking device is provided with a vertical guide rod on the outer shell, and a straightening ring is movably connected with the vertical guide rod through a transverse guide rod, which is conducive to straightening the bottleneck of the conical flask to ensure that the mouth of the burette is always aligned with the center of the bottle mouth, and then ensures that the titration liquid drips into the bottle smoothly. By providing a support base on the rotating base, the support base and the rotating base are movably connected through magnetic steel, and the eccentricity can be arbitrarily adjusted according to actual needs, and then the conical flask can form different shaking amplitudes to meet the requirements. By providing an adjusting bolt on one side of the movable clip, the movable clip is movably connected with the support base through a rubber connecting belt, which is conducive to installing the conical flask in the fixed clip and the movable clip, and can fix the conical flask.

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 discloses a Karl Fischer moisture meter for optimizing titration effect, which comprises a reaction tank, the upper end of the reaction tank is fixedly connected with a motor, the output shaft of the motor is fixedly connected with a rotating rod, the outer side wall of the rotating rod is fixedly connected with a plurality of pairs of stirring rods, the inner wall of the reaction tank is fixedly connected with a partition plate, and the partition plate is fixedly connected with a baffle plate. One side of the reaction tank is provided with a sealing plate, one side of the sealing plate is fixedly connected with a filter screen, one side of the reaction tank is provided with an induction electrode tube, one end of the induction electrode tube is provided with an induction electrode, and the other side of the reaction tank is provided with a burette. The filter screen is transversely arranged on the inner wall of the reaction tank, so that generated floccules are filtered, the floccules are prevented from being wound on the induction electrode and the burette, the titration speed of the burette is ensured, the induction electrode can be in full contact with reaction liquid, and the test accuracy of the Karl Fischer moisture meter 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 utility model relates to the technical field of titration, in particular to a medicine titration device for inspection, which comprises a support plate, a plurality of groups of clamping components and a fixing component, the support plate comprises a bottom plate, a vertical plate, a plurality of groups of clamping components for clamping a test tube, the plurality of groups of clamping components are mounted on the inner side of the vertical plate, and the fixing component is used for fixing a beaker. According to the medicine titration device for inspection, the multiple clamping assemblies can fix the multiple burettes, so that titration bottles are placed on the fixing assemblies to be fixed during titration, the fixing assemblies drive the titration bottles to move to the positions below the different burettes according to the titration sequence, and workers are assisted in titration; the burette fixing device is simple in structure and convenient to use, the situation that a plurality of titration frames are needed to fix different burettes during a titration experiment is avoided, use is convenient, the arranged vertical plate can drive the fixing assembly to rotate by a certain angle, the burettes are driven to incline, and a worker can conveniently and directly guide a titration solution into the burettes.

The invention belongs to the field of geological monitoring, and discloses a loess macropore constant water head preferential seepage tail end channel observation device and method, and the device comprises a camera, a funnel, polystyrene foam, a first burette, a second burette, a constant water head three-way pipe, a drainage bottle, a first iron stand and a second iron stand; one end of the camera is fixed on the first iron stand; a permeable stone is arranged in the middle of a large opening of the funnel, the surface of the permeable stone is used for fixing an undisturbed loess sample and a supporting tube, and polystyrene foam is filled between the supporting tube and the loess sample; the first end and the third end of the constant water head three-way pipe are respectively connected with the water discharging bottle and the first burette; and the first burette and the second burette are connected through the second three-way pipe and the third three-way pipe. A soil sample is not disturbed, the height of a water head is fixed, a macropore preferential seepage tail end channel can be quickly observed, the specific yield can be quickly measured, the working efficiency is high, and the device is flexible and detachable. The problems that at present, preferential seepage macropore channels in loess are difficult to capture, and the specific yield of undisturbed loess is difficult to measure are effectively solved.

The utility model discloses a chemical analysis titration rack and a titration table device, and relates to the technical field of chemical titration analysis equipment. The chemical analysis titration stand and titration stand device comprises a titration stand box body and a box door arranged at the opening end of the titration stand box body, a stepped hole is formed in the middle of the surface of the top of the titration stand box body, and a titration stand surface is arranged in an inner cavity of the stepped hole; a hollow pipe is arranged in the center of the top surface of the titration table top, a burette is arranged on one side of the hollow pipe and connected with the hollow pipe through a stabilizing assembly, and an LED lamp strip is arranged in an inner cavity of the hollow pipe; by means of the technical improvement, interference of external light changes on color changes of a titration end point is avoided, meanwhile, judgment of personnel on the end point is improved, and data of a burette can be observed and read conveniently.

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 belongs to the field of laboratory devices, and relates to a burette support which comprises a base, a stand column, a moving part, a rotating shaft, a rotating rod and a butterfly clamp, the moving part is sleeved on the stand column and can slide up and down, the moving part can be fixed on the stand column through a moving part fixing nut, and the moving part, the rotating rod and the butterfly clamp can be connected through the rotating shaft. A plurality of burettes can be installed at the same time by installing a plurality of moving pieces, 360-degree space with the stand column as the center can be fully utilized by adjusting the directions of the moving pieces, the height of the burettes can be freely adjusted by adjusting the angle of the rotating shaft, use is flexible, convenient and fast, and the working efficiency can be greatly improved.

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 relates to the field of burettes, and discloses a novel burette which comprises a burette body, a dustproof cover is detachably arranged at the top end of the burette body, a fixing plate is arranged on the surface of the burette body, a limiting strip is fixed on the surface of the dustproof cover, a release groove is formed in one side of the limiting strip, and the release groove is communicated with the dustproof cover. And storage grooves are formed in the two sides of the fixing plate correspondingly, sliding plates are slidably inserted into the storage grooves, sliding rods are fixed to one sides of the interiors of the storage grooves, and the sliding rods and the sliding plates are slidably inserted. According to the utility model, the limiting column slides oppositely on the top surface of the limiting strip and finally penetrates through the releasing groove to release the limiting of the dustproof cover, so that the dustproof cover can be opened and titrant can be received, the dustproof cover can be covered by the same hand after the titrant is received, a worker can perform the whole operation by one hand, the action is natural and coherent, and the working efficiency is improved. And the convenience in operation is improved.

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 relates to a trace burette fixing device, which comprises a base, a support rod, a titration clamp, a magnifying glass and a trace burette, the trace burette comprises a liquid injection tube, a graduated measuring tube and a solid glass column, the upper part of the liquid injection tube is clamped and fixed through the titration clamp, the titration clamp is arranged on the support rod, and the magnifying glass is arranged on the base. The bottom of the supporting rod is fixed on the base, the base is provided with a supporting sleeve corresponding to the solid glass column, the supporting sleeve is inserted into the base, the solid glass column of the micro burette is inserted into the supporting sleeve, and the magnifying glass is arranged corresponding to the scale marks of the scale measuring tube. The micro burette is doubly fixed by adopting the support sleeve and the titration clamp up and down, so that the micro burette is not easy to shake in the test process, the operation error is reduced, and the test efficiency is improved; the magnifying lens can be better used for test reading, and the accuracy of test results is improved; the device is simple to operate, convenient to disassemble and assemble and accurate in test data, and has positive popularization significance.

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 relates to the technical field of sauce detection, and discloses a titration device for detecting the peroxide value of sauce, which comprises a working table, a groove is arranged in the middle of the top end of the working table, a titration cup is arranged in the groove, and fixing mechanisms for limiting the titration cup are arranged at the top end of the working table and on two sides of the titration cup. A supporting frame is arranged on one side of the top end of the workbench, a cross beam is arranged in the supporting frame in a sliding mode, a clamping frame is arranged below the cross beam in a sliding mode, and a burette is fixed in the clamping frame through a clamping mechanism, so that the burette is arranged in the through hole. The titration containers with different sizes can be fixed through the arranged fixing mechanism, and the position of the burette can be adjusted according to the position of the through hole through the arrangement of the cross beam capable of moving up and down, the clamping frame capable of moving back and forth and the clamping mechanism capable of movably clamping the burette, so that the burette is arranged in the through hole.

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 invention discloses an auxiliary observation device for a chemical titration test, which comprises a display arranged on one side of a box body, a conical flask arranged in the middle of the interior of the box body, a burette arranged at the top of the conical flask, operation holes formed in two sides of the box body, a notch formed in the side surface of the conical flask, and a groove formed in the box body on the outer side of the conical flask, an observation mechanism for shooting the conical flask is arranged on the outer side of the conical flask; a stirring mechanism for stirring the conical flask at a variable speed is arranged on the outer side of the conical flask, the conical flask is shot at different distances through a global camera and a local camera which are different from the conical flask in distance and is stored and displayed on a display, and a solution in a burette is weighed by matching with a balance; the change process of the titration solution is visually seen on the display, the titration amount does not need to just reach the color change degree, the titration end point can be judged according to playback, errors caused by misjudgment of the color change are avoided, and the accuracy of the titration test is improved.