CN108645962B - Pressure-stabilizing type acid burette based on pressure transmission U-shaped pipe - Google Patents
Pressure-stabilizing type acid burette based on pressure transmission U-shaped pipe Download PDFInfo
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- CN108645962B CN108645962B CN201810743388.2A CN201810743388A CN108645962B CN 108645962 B CN108645962 B CN 108645962B CN 201810743388 A CN201810743388 A CN 201810743388A CN 108645962 B CN108645962 B CN 108645962B
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- 239000002253 acid Substances 0.000 title claims description 19
- 230000005540 biological transmission Effects 0.000 title description 2
- 238000004448 titration Methods 0.000 claims abstract description 75
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 230000006641 stabilisation Effects 0.000 claims abstract 6
- 238000011105 stabilization Methods 0.000 claims abstract 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 32
- 229910052742 iron Inorganic materials 0.000 claims description 17
- 239000011521 glass Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 238000004898 kneading Methods 0.000 claims 1
- 239000000243 solution Substances 0.000 description 9
- 230000000087 stabilizing effect Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000973497 Siphonognathus argyrophanes Species 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
- G01N31/18—Burettes specially adapted for titration
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
本发明公开了一种基于传压U型管的稳压式酸式滴定管，包括稳压机构、滴定机构和支撑机构，所述稳压机构和滴定机构固定连接所述支撑机构，所述稳压机构连通所述滴定机构，所述稳压机构包括U形管（2）和加压机构，所述滴定机构包括连管（12）和滴定管（7），所述U形管（2）通过所述连管（12）连通所述滴定管（7），所述U形管（2）中注入施压液体使所述U形管（2）左端隔离所述U形管（2）的右端，所述加压机构安装在所述U形管（2）的右端或所述连管（12）上。本发明提供将滴定部分与稳压部分结合在一起，保证施压液体产生的压强是趋于恒定的，使得滴定的速度也是趋于稳定的，提高了滴定管的滴定精度，增强了实验精度。
The invention discloses a pressure-stabilizing acid-type burette based on a pressure-transmitting U-shaped tube. The mechanism communicates with the titration mechanism, the pressure stabilization mechanism includes a U-shaped tube (2) and a pressurizing mechanism, the titration mechanism includes a connecting pipe (12) and a burette (7), and the U-shaped tube (2) passes through the The connecting pipe (12) communicates with the burette (7), and the pressure liquid is injected into the U-shaped pipe (2) so that the left end of the U-shaped pipe (2) is isolated from the right end of the U-shaped pipe (2). The pressurizing mechanism is installed on the right end of the U-shaped pipe (2) or on the connecting pipe (12). The invention provides the combination of the titration part and the voltage stabilization part to ensure that the pressure generated by the pressurized liquid tends to be constant, so that the titration speed tends to be stable, the titration accuracy of the burette is improved, and the experimental accuracy is enhanced.
Description
Technical Field
The invention relates to a pressure-stabilizing acid burette based on a pressure-transmitting U-shaped pipe, belonging to the technical field of pressure-stabilizing acid burettes.
Background
In chemical experiments, acid burettes are often used to drop acidic or strongly oxidizing solutions at a specified rate, such as for acid-base neutralization titration experiments. With a common acid burette, as the test progresses, the solution in the burette decreases, the downward pressure of the solution in the burette at the burette nozzle becomes less, and the titration rate slows down. Particularly, in the end period of titration, the amount of solution in the burette is very small, and the downward pressure generated at the burette nozzle is nearly equal to the atmospheric pressure, so that liquid drops cannot drop, and the titration rate is not uniform in the whole test process. For some tests with higher requirements on reaction time, the accuracy influence is larger.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a pressure-stabilizing type acid burette based on a pressure-transmitting U-shaped pipe, which can stabilize the hydraulic pressure at a burette nozzle in the experimental process, has stable titration speed and greatly improves the titration precision.
In order to achieve the purpose, the invention provides a pressure-stabilizing acid burette based on a pressure-transmitting U-shaped pipe, which comprises a pressure-stabilizing mechanism, a titration mechanism and a supporting mechanism, wherein the pressure-stabilizing mechanism and the titration mechanism are fixedly connected with the supporting mechanism, the pressure-stabilizing mechanism is communicated with the titration mechanism, the pressure-stabilizing mechanism comprises a U-shaped pipe and a pressurizing mechanism, the titration mechanism comprises a connecting pipe and a burette, the U-shaped pipe is communicated with the titration pipe through the connecting pipe, pressurizing liquid is injected into the U-shaped pipe to enable the left end of the U-shaped pipe to be isolated from the right end of the U-shaped pipe, and the pressurizing mechanism is arranged at the right end of the U-shaped pipe or on the connecting pipe.
Preferably, the pressurising mechanism is a pressurised ball or a pump.
Preferably, the pressure stabilizing mechanism comprises a spherical bottle, the lower end of the spherical bottle is fixedly connected with the left end of the U-shaped pipe, the upper end of the spherical bottle is open, and the right end of the U-shaped pipe is fixedly connected with the left end of the connecting pipe in a sealing manner.
Preferably, the pressure stabilizing mechanism comprises a pneumatic valve, and the pneumatic valve is mounted on the right end of the connecting pipe.
Preferentially, titration mechanism is including titrating the valve, buret upper end intercommunication the connecting pipe middle-end, the buret titrate the installation of mouthpiece top the titration valve, pressurization mechanism installs the connecting pipe middle-end is last.
Preferably, the supporting mechanism comprises two iron stand tables and two iron clamps, two the iron clamps clamp the U-shaped pipe with the buret, two the iron clamps are one of fixed connection respectively the iron stand tables.
Preferably, the pressurizing liquid is a solvent corresponding to the titration solution in the burette.
Preferably, the pressure ball is a PVC hand-pinch pressure ball.
Preferably, the pneumatic valve is a disc handle valve VA type, and the titration valve is an A-grade white acid glass piston.
The invention achieves the following beneficial effects:
the invention provides a pressure-stabilizing acid burette based on a pressure-transmitting U-shaped pipe. Compared with the traditional common acid burette, the burette of the invention combines the titration part and the pressure stabilizing part together, the hydraulic pressure at the burette nozzle is equal to the sum of the pressure generated by the dead weight of the pressurized liquid and the pressure generated by the dead weight of the titration liquid, and the pressure generated by the pressurized liquid is kept to be constant and invariable, so that the hydraulic pressure at the burette nozzle is still larger than the external atmospheric pressure at the end of titration, the titration liquid is ensured to drip smoothly, and the larger the pressure generated by the dead weight of the pressurized liquid is, the smaller the influence of the titration liquid on the hydraulic pressure at the burette nozzle is; the less the remaining titration liquid, the less the influence on the hydraulic pressure at the titration nozzle. Therefore, the hydraulic pressure at the titration nozzle tends to be stable in the test process, the titration speed also tends to be stable, the titration precision of the burette is improved, and the test precision is enhanced.
Drawings
FIG. 1 is a block diagram of the present invention in operation;
FIG. 2 is a schematic view of a U-shaped tube in an initial state of the invention.
Reference is made to the attached drawings, 1-balloon; 2-a U-shaped tube; 3-applying the upper liquid level of the liquid; 4-liquid level under the pressure liquid; 5-a pressurized ball; 6-pneumatic valve; 7-burette; 8-titration valve; 9-titration nozzle; 10-iron stand table; 11-iron clamp; 12-connecting the tube.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The utility model provides a steady voltage formula acid buret based on biography pressure U type pipe, includes steady voltage mechanism, titration outfit for a journey and supporting mechanism, steady voltage mechanism and titration outfit for a journey fixed connection supporting mechanism, steady voltage mechanism intercommunication titration outfit for a journey, steady voltage mechanism includes U-shaped pipe 2 and loading system, titration outfit for a journey 12 and buret 7, U-shaped pipe 2 passes through even pipe 12 intercommunication buret 7, it makes to inject pressure liquid into U-shaped pipe 2 the 2 left ends of U-shaped pipe keep apart the right-hand member of U-shaped pipe 2, loading system installs the right-hand member of U-shaped pipe 2 or on the even pipe 12.
Further, the pressurizing mechanism is a pressurizing ball 5 or an inflator.
Further, steady voltage mechanism includes spherical bottle 1, 1 lower extreme fixed connection of spherical bottle 2 left ends of U-shaped pipe, 1 upper end opening of spherical bottle, 2 right-hand members of U-shaped pipe sealed fixed connection the 12 left ends of connecting pipe.
Further, the pressure stabilizing mechanism comprises a pneumatic valve 6, and the pneumatic valve 6 is installed at the right end of the connecting pipe 12.
Further, titration mechanism includes titration valve 8, buret 7 upper end intercommunication 12 middle-ends in the connecting pipe, titration mouthpiece 9 top installation of buret 7 titration valve 8, pressurization mechanism installs on 12 middle-ends in the connecting pipe.
Further, supporting mechanism includes two iron stand platforms 10 and two iron clamps 11, two iron clamp 11 is cliied respectively the U-shaped pipe 2 with buret 7, two iron clamp 11 is one of fixed connection respectively iron stand platform 10.
Further, the pressurizing liquid is a solvent corresponding to the titration solution in the burette (7), for example, if the burette (7) is water, the pressurizing liquid is also water.
Further, the pressurizing ball 5 is a PVC hand-pinch pressurizing ball. The inflator is J02008 in model number.
Further, the pneumatic valve 6 is a disc handle valve (such as a disc handle valve VA type), and the titration valve 8 is an A-grade white acid glass piston.
The working principle of the invention is as follows:
after a series of chemical experiment pretreatment such as washing, checking air tightness, detecting leakage and the like, the following operations are carried out:
first, the pneumatic valve 6 is opened and the titration valve 8 is closed. Adding solution required by the test into the titration tube body 7 at the liquid injection port of the air pressure valve 6, slowly opening the titration valve 8 to enable the titration tube mouth 9 to be filled with the solution, closing the titration valve 8, and starting the titration tube body again when waiting for the test to start.
Then, the pressurizing liquid is injected into the U-shaped tube 2 through the upper end opening of the spherical bottle 1. The kind of the pressurizing liquid is determined according to the test requirements such as liquid density, volatility, and avoidance of mutual reaction of the pressurizing liquid vapor and the titration liquid vapor. The volume of pressurizing liquid is determined by the test operator based on the titration volume. Before pressurization, according to the principle of a communicating vessel, the left and right liquid levels of the pressurized liquid column are on the same horizontal line, as shown in fig. 2.
Next, the pneumatic valve 6 is closed, and a closed space is formed inside the apparatus.
The inside of the apparatus is pressurized by the pressurizing ball 5. The pressurizing ball 5 is characterized in that air is injected into the device when being pressed and air is sucked from the outside of the device when being released without lowering the air pressure in the device. The air in the device does not actively escape through the pressurized ball 5.
As the air pressure in the U-tube 2 increases, the two levels of the pressurized liquid begin to have a height difference, eventually reaching the effect of the upper level 3 and the lower level 4 in fig. 1. And according to the practical situation of the test, the scales of the U-shaped pipe are referred, so that the lower liquid level 4 of the pressurizing liquid is still not lower than the straight pipe part on the left side of the U-shaped pipe at the later stage of the titration, namely, the pressurizing liquid does not enter the circular arc section, and the air pressure in the U-shaped pipe 2 is ensured to be constantly equal to the pressure generated by the gravity of the pressurizing liquid.
After the height of the pressurizing liquid is adjusted, the titration valve 8 is slowly opened, and the titration speed is adjusted as required.
During the test, according to the Pascal law, the hydraulic pressure at the titration nozzle 9 is equal to the sum of the pressure generated by the self weight of the pressurizing liquid and the pressure generated by the self weight of the titration liquid. Although the hydraulic pressure at the titration nozzle 9 was slightly reduced by the reduction of the titration liquid throughout the test, the pressure generated by the pressurizing liquid was constant. Therefore, even at the end of titration, the hydraulic pressure at the titration nozzle 9 is still greater than the external atmospheric pressure, and the titration liquid is ensured to drop smoothly. And the larger the pressure intensity generated by the self weight of the pressurizing liquid is, the smaller the influence of the titration liquid on the hydraulic pressure at the titration nozzle 9 is; the less the remaining titration liquid, the less the influence on the hydraulic pressure at the titration nozzle 9. It can be approximated that the hydraulic pressure at the titration nozzle 9 tends to be stable during the test, and the titration speed also tends to be stable.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810743388.2A CN108645962B (en) | 2018-07-09 | 2018-07-09 | Pressure-stabilizing type acid burette based on pressure transmission U-shaped pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810743388.2A CN108645962B (en) | 2018-07-09 | 2018-07-09 | Pressure-stabilizing type acid burette based on pressure transmission U-shaped pipe |
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| CN108645962A CN108645962A (en) | 2018-10-12 |
| CN108645962B true CN108645962B (en) | 2021-02-12 |
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| CN201810743388.2A Active CN108645962B (en) | 2018-07-09 | 2018-07-09 | Pressure-stabilizing type acid burette based on pressure transmission U-shaped pipe |
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| CN113607881A (en) * | 2021-08-19 | 2021-11-05 | 中国一冶集团有限公司 | Anti-drip burette, system and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60235646A (en) * | 1984-05-09 | 1985-11-22 | Mitsubishi Electric Corp | Fluid dripping device |
| CN101718726A (en) * | 2009-11-30 | 2010-06-02 | 河海大学 | Device and method for measuring gas specific heat ratio |
| CN201974419U (en) * | 2011-03-11 | 2011-09-14 | 吴晟 | Liquid-adding titration apparatus |
| CN203083978U (en) * | 2013-03-14 | 2013-07-24 | 潘祥坡 | Titrating device for inspection |
| CN203587566U (en) * | 2013-12-12 | 2014-05-07 | 哈尔滨医科大学 | Titration apparatus |
| CN204789507U (en) * | 2015-06-25 | 2015-11-18 | 宁波大学 | Multipurpose combined type buret |
| CN204945109U (en) * | 2015-08-11 | 2016-01-06 | 王张鑫 | A kind of microburette device |
| CN206152825U (en) * | 2016-11-03 | 2017-05-10 | 山东科技大学 | Novel acid type burette |
| CN207232115U (en) * | 2017-08-25 | 2018-04-13 | 河北德润厚天仪器制造有限公司 | A kind of automatic Titration structure |
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