CN208283348U - A kind of number display titration instrument - Google Patents

Abstract

The utility model discloses a kind of number display titration instruments, including titration control system and measurement display system, titrating control system includes titration cylinder, sealing device, liquid discharge device, screwdown valve, titrate arm and titrating head, titration cylinder is installed on sealing device, sealing device is connected with liquid discharge device, liquid discharge device is connected by screwdown valve and titration arm with titrating head, measuring display system includes test desk, mass sensor, single-chip microcontroller, circuit board, display screen and auxiliary input device, titration control system is placed in above test desk, mass sensor is located at below test desk；Analyzer reduces same quasi-instrument bring great number cost with screwdown valve control rate of titration as the driving force titrated by titrant solution self gravity potential energy, avoids the trouble of frequent liquid feeding zeroing, and control more convenient, flexible, efficient；By display screen monitor in real time titrant solution data, convenient for analysis titration data, have the characteristics that simplicity, fast and accurately.

Description

A kind of number display titration instrument

Technical field

The utility model relates to titrimetry instrument technical field, a kind of number display titration instrument and its operation side Method.

Background technique

Titrimetry is a kind of widely used analysis test method.Traditional titration analysis device is by buret, butterfly Folder and iron stand composition, continued to use for more than 160 years so far, its shortcoming is that, occupied space is larger, the preparation of buret, clear Wash, liquid feeding, zeroing, the operations such as reading it is not only cumbersome but also more demanding, titration end-point control is more difficult, error in reading compared with Greatly, titration efficiency is lower, and easily leakage or blocking, the operation of alkali formula pipe are laborious due to smearing vaseline is improper for acid tube capacity, glass drop It is easy to damage etc. to determine tube capacity.But since its structure is simple, cheap, by highly trained staff in use, can also obtain Satisfactory titration data, and there is no the titration analysis device all appropriate in terms of performance and price two can be complete so far Replace it entirely, so all very general in the chemical laboratory of universities and middle schools, in the laboratory of production and R&D institution at present This traditional titration analysis device is used everywhere.

Presently commercially available various digital titrimetry instruments, most structure is more complex, with computer chip, control electricity Road, digital display screen etc., and using accurate peristaltic pump driving titrant solution and control rate of titration, automatic potentiometric titration therein Instrument must also be equipped with electrode special, although these automation equipment degree are higher, overcome the major defect of conventional titration device, Overall performance is better than conventional titration device, but since its rate of titration depends on the revolving speed of accurate peristaltic pump roller, works as revolving speed One timing, titrant solution volume used then depends on the working time of peristaltic pump, therefore wants to the precision of instrument observing and controlling system It asks very high, causes instrument price expensive；Due to the pulsating nature of peristaltic pump infusion, and carry out solution used in volume correction and each The difference of viscosity, all may cause the variation of peristaltic pump output, brings titrant solution cubing between kind titrant solution Error, meanwhile, titration control owe flexibly, increase the difficulty for accurately controlling titration end-point.Therefore their market accounts at present There is rate very low, it is difficult to promote and apply.

Utility model content

In order to solve or improve disadvantages mentioned above present in conventional titration analytical equipment and commercially available digitlization titrator, this reality A kind of number display titration instrument is designed to provide with novel.

In order to realize the purpose of this utility model, the utility model proposes the following technical solutions:

A kind of number display titration instrument, including titration control system and measurement display system, titrate control system packet Include titration cylinder, sealing device, liquid discharge device, screwdown valve, titration arm and titrating head；Titration cylinder be installed on above sealing device and with Sealed connection, which can be to be fixedly connected, or be detachably connected；Sealing device and liquid discharge device are fixed or can Disassembly is connected, and liquid discharge device is connected by screwdown valve and titration arm with titrating head.Wherein, bore and the volume for titrating cylinder are larger, The titrant solution that up to 2-10 times of conventional titration pipe maximum volume is even more can easily be installed additional, therefore will not be dripped as tradition Determine device continually liquid feeding, zeroing like that, while being also easier to remove cleaning than conventional titration pipe.

Titration control system is placed in the top of test desk, and the titrant solution in high-order titration cylinder is in itself weight Under the driving of power potential energy, it is flowed into screwdown valve, titration arm from liquid discharge device, is finally flowed out from the titrating head, rotates spinning The knob of valve can continuously change the flow velocity of titrant solution, to control the size of rate of titration.

Preferably, liquid discharge device includes outlet tube and elastic hose interconnected, and outlet tube is connected with sealing device.Bullet Property hose the other end successively pass through sealing drum, screwdown valve, titration arm, be connected on titrating head, titrant can be made molten in this way The flowing of liquid more easily controls.

Preferably, sealing device includes sealing drum and the sealing cover in cylinder, and the lower nozzle for titrating cylinder is covered tightly with sealing Close connection, sealing cover are connected with outlet tube.Specifically, outlet tube is connected to the centre of sealing cover, the titration in cylinder is titrated Agent solution passes through sealing cover and flows out from outlet tube.Optionally, the lower nozzle for titrating cylinder is closely revolved by screw thread and sealing cover It closes, to prevent the leakage of titrant solution.

Preferably, sealing device is located on the test desk, and mass sensor is located at the test desk lower part, for that will examine The quality signal transmission of survey is connect by circuit board with display screen to single-chip microcontroller, single-chip microcontroller, can be by the titrant solution matter of receiving Amount signal is converted to volume signals, and is shown by display screen.Sealing drum has certain height, and lower end is vertically fixed on On test desk, the position of the titration cylinder can be increased and be fixed, the gravitional force of titrant solution in titration cylinder is improved, to drive Dynamic titrant solution preferably flows.

Preferably, titration cylinder upper end is provided with the cover being used cooperatively, and cover can be covered tightly and be unscrewed, to improve titration cylinder The stability of interior titrant solution short-term storage, and ensure that it is not stained by introduced contaminants, keep experimental result relatively reliable.

The measurement display system of this analyzer includes test desk, mass sensor, single-chip microcontroller, circuit board, display screen and auxiliary Help input equipment.Titration control system is placed in the top of test desk, and mass sensor is set to the lower section of test desk, can will survey The quality signal of titration cylinder, titrant solution, sealing device, liquid discharge device on amount platform etc. is transformed into electric signal, is transmitted to machine Single-chip microcontroller processing in shell, obtains the quality of the titrant solution flowed out from titrating head；The titrant solution passes through normal volume After quality-volume correction of bottle and measurement being further processed of display system, the titrant solution can be measured, shows and stored Quality-volume correction factor；In subsequent " titration " mode, measurement display system can utilize quality-volume correction factor, It is directly volume by the mass shift of the titrant solution consumed in titration process, and is come out by display screen real-time display, When carrying out titrimetry using identical titrant solution, the stored solution quality-volume correction can be called directly Coefficient.

Preferably, analyzer further includes normal volume bottle, and normal volume bottle is used to measure quality-volume of titrant solution Correction coefficient, normal volume bottle refer to that its containing mark is accurate to the volumetric flask for the horizontal high quality that error allows, it can be with It is internal or external in measurement display system.

Measuring display system further includes interface, power supply, casing and aided input systems etc.；Casing is for installing, protecting, directly Connect or fix indirectly all parts and system of titration instrument；Pass through operation aided input systems (such as various keys, but not It is limited to), the corresponding program of single-chip microcontroller can be run, realizes clearing, titrant solution quality-volume correction, titrant solution quality- The functions such as the storage of volume correction factor and calling, the display of titrant solution volume, the processing of titration data, not only make to test Personnel remove repeatedly liquid feeding from, return to zero, estimate the trouble for reading scale, and easy to operate quick, accuracy of reading, measurement error are small.

Preferably, analyzer further includes that external mixed reactor for receiving titrant solution provides drop reaction Place；Hybrid reaction system is placed outside beside casing, including titration bottle, blender and the stirrer in titration bottle；Titration Bottle is provided with solution to be measured, instills together with the titrant solution in bottle with from titrating head, in magnetic stirring apparatus and stirrer Stirring is lower to be uniformly mixed, and drop reaction occurs.

Corresponding, which shows that the operating method of titration instrument includes the following steps:

S1. titration cylinder is installed on sealing device, is packed into titrant solution；

S2. the processing of pipeline drip wash is done；

S3. start titration experiments: selecting " titration " mode, display screen is reset, opening screwdown valve, titrant solution is from drop Determine head and instill mixed reactor, with component reaction to be measured, by rotating spinning valve regulation rate of titration, display screen is real-time at this time Show consumed titrant solution volume in titration process；

When S4. titrating to terminal, screwdown valve is closed immediately, terminates titration experiments, and display screen shows this titrimetry institute The total volume of the titrant solution of consumption；

S5. display screen is adjusted, can show the experiment parameter of titrant solution.

It preferably, further include the quality-volume correction factor step for measuring titrant solution, step before step S3 Are as follows: power on, display screen is reset, titrant solution is instilled in normal volume bottle until scale, passes through measurement display system The processing of system obtains quality-volume correction factor of titrant solution, and is stored spare, specifically includes:

S301 is clear by the gross mass of titration cylinder and built-in titrant solution, sealing device, liquid discharge device etc. on test desk Zero；

S302 adjusts screwdown valve, makes titrant solution from being flowed out in normal volume bottle in titrating head, when just full of it When scale, screwdown valve is closed immediately, and screen display at this time flows into the titrant solution quality in normal volume bottle, by single-chip microcontroller After processing, obtain quality-volume correction factor of the titrant solution, and shown by display screen, single-chip microcontroller storage it is spare.

In step s3, under " titration " mode, measurement display system can utilize quality-volume correction of titrant solution The mass shift of titrant solution consumed in titration is directly volume by coefficient, and real-time display comes out.

When carrying out titrimetry using identical titrant solution, the quality-of the stored solution can be called directly Volume correction factor, this method for directly carrying out quality-volume correction and measurement to titrant solution used, not only avoids It is surveyed brought by difference of pulsating nature and calibration solution that existing digital display titration apparatus is exported by peristaltic pump and titrant viscosity etc. Error is measured, and is operated easier, reliable and accurate.

Preferably, pipeline drip wash processing step includes: opening screwdown valve, titrates the titrant solution in cylinder by itself weight The driving of power potential energy is successively flowed through from outlet tube, elastic hose, screwdown valve, titration arm, is finally flowed out from titrating head.

Compared with prior art, the advantageous effects of the utility model are as follows:

Bore and the capacity for titrating cylinder are larger, install more titrant solution additional with can be convenient, avoid frequent liquid feeding, tune Zero reads the trouble of scale with estimating, and makes the more efficient of titrimetry；

Compared with current commercial all kinds of titrimetry instruments, the utility model utilizes titrant solution itself in titration cylinder Driving force of the gravitional force as titration, the size of rate of titration is controlled by rotation screwdown valve, eliminates same quasi-instrument It drives titrant and controls the accurate peristaltic pump and its driving circuit of rate of titration, not only greatly reduce instrument cost, but also It adjusts more easily, easily and fast, is more advantageous to and accurately controls titration end-point, complete titration process.

The utility model directly carries out quality-volume correction to titrant solution using normal volume bottle, shows through measurement After system processing, quality-volume correction factor of titrant solution is acquired, and then real-time display is corrected in titrimetry The titrant solution volume of consumption.This method that quality-volume correction and measurement directly are carried out to titrant solution used, no Existing digital display titration apparatus is only avoided because of the difference of the peristaltic pump pulsating nature exported and calibration solution and titrant solution viscosity The measurement error Deng brought by, and operate easier, reliable and accurate.Titration point is being carried out using identical titrant solution When analysis, quality-volume correction factor of the stored solution can be called directly, titration operation is further simplified, improved Titration efficiency.

Detailed description of the invention

It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings Obtain other attached drawings.

Fig. 1 is the titrator with digital indication schematic device of the utility model；

Fig. 2 is the titration cylinder, sealing drum and elastic hose connection schematic diagram of the utility model.

Wherein, the reference numerals are as follows by Fig. 1 to Fig. 2:

1- casing, 2- test desk, 3- sealing drum, 4- titrate cylinder, 5- cover, 6- elastic hose, 7- screwdown valve, 8- titration Arm, 9- titrating head, 10- titration bottle, 11- stirrer, 12- magnetic stirring apparatus, 13- display screen, 14- control button, 15- titrate cylinder Lower nozzle, 16- sealing cover, 17- outlet tube

Specific embodiment

To keep the purpose of this utility model, technical solution and advantage clearer, implement below in conjunction with the utility model Attached drawing in example, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described reality Applying example is only the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this reality With novel protected range.

Below with reference to attached drawing, the utility model is further described in detail.

A kind of number display titration instrument as shown in Figure 1 to Figure 2, including titration control system and measurement display system, Titration control system includes sealing drum 3, titration cylinder 4, cover 5, sealing cover 16, outlet tube 17, elastic hose 6, screwdown valve 7, drop Fixed arm 8, titrating head 9.Wherein, it titrates 4 bore of cylinder and volume is larger, cooperating therewith use has cover 5, and cover 5 is set to drop 4 upper end of safety barrel, openable closure.Titration cylinder 4 is located at the top of sealing drum 3 and is placed in inside sealing drum 3, and sealing cover 16 is fixed It is placed in 3 interior location of sealing drum, the sealing cover 16 under cylinder on nozzle 15 and sealing drum 3 is titrated and passes through the screw thread closely company of screwing It connects, to prevent titrant from leaking.The center of sealing cover 16 connects one end of an outlet tube 17, and 17 other end of outlet tube and elasticity are soft One end of pipe 6 is connected directly, and the other end of elastic hose 6 passes sequentially through the barrel of sealing drum 3, screwdown valve 7, titration arm 8, finally It is connected on titrating head 9；Sealing drum 3 can fix and increase simultaneously the position of titration cylinder 4, make in high-order titration cylinder 4 Titrant solution can the gravitional force of itself driving under flow downward.

It can be concluded that sealing cover 16 is not limited only to be fixedly connected with sealing drum 3, according to the dissimilarity of titrant solution Matter and experimentation need, and sealing cover 16 can be adjusted up and down in height, to change the height of titration cylinder position；In addition, sealing Lid 16 can replace, and for disposing the titration cylinder of different dimensions, increase the applicability of instrument.

Casing 1 disposes instrument base, for fixing all parts and system of titration instrument.Screwdown valve 7 is fixedly installed On casing 1, titration arm 8 is fixed on 7 side of screwdown valve, when rotation screwdown valve 7, can control the speed of rate of titration, needed for allowing The titrant solution of volume is flowed out from titrating head 9, and is instilled in the titration bottle 10 beside casing, and magnetic stirring apparatus 12 drives titration 11 quick rotation of stirrer in bottle 10 is uniformly mixed solution to be measured in bottle with titrant solution, and drop reaction occurs, when When reaching titration end-point, screwdown valve 7 is closed immediately, completes titration process.

A test desk 2, display screen 13 and the control button 14 on keyboard is fixedly installed in 1 top of casing.In casing 1 Portion is provided with the (not shown)s such as single-chip microcontroller, mass sensor, circuit board, power supply, and mass sensor is located inside casing 1 Lower position, and it is fixed on test desk 2, sealing drum 3 is vertically fixed on the upper surface of test desk 2, from titration cylinder 4, titration Quality signal caused by the titrant solution of first 9 outflow is converted into electric signal by mass sensor detection, by standard body It is transformed into volume signals, and the display screen by being fixed on casing surface after the processing of the quality-volume correction and single-chip microcontroller of product bottle 13 displays；By operating each function key in the control button 14 that is connected with single-chip microcontroller, may be implemented this instrument as power supply is opened Or pass, zeroing, titrant solution quality-volume correction, the storage of quality-volume correction factor and calling, titrant used are molten The display of liquid product, the functions such as processing of titration data.

The present embodiment also discloses a kind of operating method of number display titration instrument, comprising the following steps:

Step 1: titration cylinder is installed on sealing device, it is packed into titrant solution, specifically, screwing off titration cylinder 4, clearly Then its lower nozzle 15 is tightened on the sealing cover 16 on sealing drum 3, titrant solution is poured into titration cylinder 4 by wash clean.

Step 2: the processing of instrument pipeline drip wash is done, specifically, screwdown valve 7 is opened, by high-order titrant solution Gravitional force driving, titrant solution will from outlet tube 17 flow into elastic hose 6, then successively by sealing drum 3, screwdown valve 7, Arm 8 is titrated, is then flowed out from titrating head 9, after pipeline drip wash is clean, closes screwdown valve 7.

If Step 3: being titrated for the first time using new titrant solution, it is necessary to measure the correction of the titrant solution first Coefficient, specifically, " power supply " key in pressing keyboard 14, powers on, the measurement of instrument and display system work；Pressing is " clear Zero " key makes the quality of all weights on test desk 2 return to zero, takes out the normal volume bottle of a certain volume, and titrating head 9 is allowed to be aligned Bottleneck, rotate screwdown valve 7, control titrant solution gradually flow into bottle, until titrant meniscus just with normal volume When the graduation mark of bottle is tangent, screwdown valve 7 is closed immediately, then presses " correction " key, and display screen 13 shows quality-volume correction system Numerical value presses " storage " key, this correction coefficient is stored spare.

If being stored with quality-volume correction factor of certain titrant solution in single-chip microcontroller, the titrant is being used When solution carries out titrimetry, so that it may call directly the correction coefficient, then carry out subsequent titrimetry.

Step 4: carrying out titrimetry." titration " key in keyboard 14 is pressed, instrument enters titrimetry mode, then presses " clearing " key is pressed, then gently opens screwdown valve 7, titrant solution is flowed out from titrating head 9, and is instilled in titration bottle 10, with it In component to be measured carry out drop reaction, titrant solution volume consumed by 13 real-time display titration process of display screen；It adjusts Screwdown valve makes rate of titration first quick and back slow, when the indicator in titration bottle 10 changes colour suddenly, closes screwdown valve 7 immediately, terminates Titration operation.Consumed titrant total volume when titrating to terminal of the display of display screen 13 at this time.

Step 5: adjusting control button 14 after titration, display screen shows the experiment parameter of titrant solution；Pressing " calculating " key therein can be substituted into measured above-mentioned titrant solution volume at selected calculation formula by single-chip microcontroller Reason, and the calculated results such as concentration or content for showing on display screen 13 component to be measured.

About the use of mixed reactor, the titration bottle 10 for filling solution and stirrer 11 to be measured is placed in magnetic agitation On device 12, and by the bottleneck of the alignment titration bottle 10 of titrating head 9, the power supply of magnetic stirring apparatus 12 is connected, adjustment stirrer 11 rotates Speed can be such that solution to be measured stirs evenly；Screwdown valve 7 is opened, titrant solution instills titration bottle 10, and it is anti-to start titration immediately It answers.

The utility model is successively flowed under the driving of itself potential energy by the titrant solution in relatively high-order titration cylinder Through nozzle 15, sealing cover 16, outlet tube 17, elastic hose 6, screwdown valve 7, titration arm 8 under the titration cylinder, then from titrating head It flows out, is instilled in the titration bottle 10 in 9, and easily adjust the flow velocity of titrant solution by screwdown valve 7, operate simpler Just, it controls flexible, quick and accurate；And titrant solution is received by mixed reactor, automatic stirring solution provides drop Determine reacting environment, increase the automaticity of instrument, keeps titration operation more convenient.

The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model Within the scope of shield.

Claims (7)

1. a kind of number display titration instrument, which is characterized in that the analyzer includes titration control system and measurement display System, the titration control system include titration cylinder (4), sealing device, liquid discharge device, screwdown valve (7), titration arm (8) and drip Determine head (9), the titration cylinder (4) is installed on the sealing device, and the sealing device is connected with the liquid discharge device, described Liquid discharge device is connected by the screwdown valve (7) and the titration arm (8) with the titrating head (9), the measurement display system Including test desk (2), mass sensor, single-chip microcontroller, circuit board, display screen (13) and auxiliary input device, the titration control Above the test desk (2), the mass sensor is located at below the test desk (2) system footprint.

2. number display titration instrument according to claim 1, which is characterized in that the analyzer further includes standard body Product bottle, the normal volume bottle are used to measure quality-volume correction factor of titrant solution.

3. number display titration instrument according to claim 1, which is characterized in that the liquid discharge device includes mutually interconnecting The outlet tube (17) and elastic hose (6) connect, the outlet tube (17) connect with the sealing device.

4. number display titration instrument according to claim 3, which is characterized in that the sealing device includes sealing drum (3) the lower nozzle of the sealing cover (16) and in cylinder, titration cylinder (4) is closely connect with the sealing cover (16), described Sealing cover (16) is connected with the outlet tube (17).

5. number display titration instrument according to claim 1, which is characterized in that the sealing device is located at the survey It measures on platform (2), the mass sensor is located at the test desk (2) lower part, and the quality signal transmission for will test is to described Single-chip microcontroller, the single-chip microcontroller are connect by the circuit board with the display screen (13), can be by the titrant solution quality of receiving Signal is converted to volume signals, and is shown by display screen (13).

6. number display titration instrument according to claim 1, which is characterized in that the setting of the titration cylinder (4) upper end There are cover (5).

7. number display titration instrument according to claim 1-6, which is characterized in that the analyzer also wraps External mixed reactor is included, for receiving titrant solution, provides the experimental place of drop reaction.