CN201186217Y - General accurate microburet for acid and alkali - Google Patents
General accurate microburet for acid and alkali Download PDFInfo
- Publication number
- CN201186217Y CN201186217Y CNU2008200083235U CN200820008323U CN201186217Y CN 201186217 Y CN201186217 Y CN 201186217Y CN U2008200083235 U CNU2008200083235 U CN U2008200083235U CN 200820008323 U CN200820008323 U CN 200820008323U CN 201186217 Y CN201186217 Y CN 201186217Y
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- tube
- microburet
- eyelet
- capillary
- capillary glass
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Abstract
The utility model belongs to an acid-alkali general-purpose precision microburete, which mainly comprises a capillary glass graded tube (1), an injector (2), a three-way piston sleeve (3), a flow liquid tube (11) and a PVC capillary tip mouth (12). The utility model is characterized in that the capillary glass graded tube (1) and the injector (2) are welded on the upper end of the three-way piston sleeve (3) in parallel, the lower end of the three-way piston sleeve (3) is welded with the flow liquid tube (11), the lower end of the flow liquid tube (11) is sheathed with the PVC capillary tip mouth (12). The acid-alkali general-purpose precision microburete utilizes the injector to absorb and add volumetric solution, which effectively guarantees that the volumetric solution can not be volatilized in air or dust falls in the volumetric solution, and prevents the problem that the volumetric solution is leaked in the graded tube under atmospheric pressure, and the designs of the capillary glass graded tube (1) and the injector (2) assure the precision and the accuracy of the microburete.
Description
Technical field
The utility model belong to a kind of accurately, the general accurate microburet of soda acid of continuous measurement volumetric soiutions volume, it is mainly used in the laboratory of universities and colleges, medicine, scientific research and industrial and mining enterprise unit and laboratory and makes small amount of liquid and repeatedly measure, and does repeatedly accurately measuring of micro substance especially and uses.
Background technology
At present, classical big capacity acid or the base buret made by a glass tube for keeping measuring the precision and the degree of accuracy, are still being used in the laboratory of universities and colleges, medicine, scientific research and industrial and mining enterprises and laboratory in capacity analysis is measured.The big volume burette of this classics consumes not only that the chemical reagent amount is big, and the chemical waste fluid of generation is many, and the waste liquid cost recovery that causes thereafter is also high.For solving the waste problem of reagent, many scholars have carried out micro-ization and microminiaturized research to the big volume burette of classics one after another.For example, Chinese patent 200720010338.0 discloses the emitter structure of a kind of buret or pipette, from the specification of patent document and claims as can be seen, this design is attempted by water dropper is made into wedge structure, solve microburet and flow out the excessive problem of droplet size, to guarantee the precision of microburet.Chinese patent 00230756.1 discloses a kind of micro type buret, this kind micro type buret wishes to have reduced by capillary trace water dropper the volume of outflow drop, with the precision that guarantees to measure, but this buret is the upper end liquid feeding from graded tube, and this has just increased the difficulty of experimental implementation.The automatic liquid feeding buret of the disclosed trace of Chinese patent 200520083270.X has solved the problem of microburet liquid feeding difficulty preferably, but owing to do not consider the diameter issue of fluid port, and this just makes measures precision and the degree of accuracy is affected.Above patent has been made work highly significant for the reagent waste and the discharging of waste liquid problem that solve classical buret, still, still has following four substantial shortcomings:
(1) because the flow liquid tip mouth of most burets is to be blown by glass tube, for guaranteeing the intensity of flow liquid point mouth, generally its diameter is blown relatively slightlyer, so just cause the droplet size that oozes bigger than normal, though Chinese patent 200720010338.0 has proposed Jiang Jianzui and has been made into wedge shape, but, still can behind the bigger drop of water dropper place aggegation one-tenth, just can drip, so still can bring bigger error to mensuration owing to flow out the surface tension of drop.
(2) for making microburet can add solution easily, and can accomplish Continuous Titration, Chinese patent 200520083270.X has designed side pipe on buret, and connected a reservoir, this design has realized repeatedly the purpose of liquid feeding and METHOD FOR CONTINUOUS DETERMINATION automatically effectively, but first in microburet during liquid feeding, but unusual trouble.
(3) in order effectively to control liquid injection pipe is carried volumetric soiutions in graded tube problem, generally adopt the method that on the path of liquid injection pipe, increases piston or tongs, this has increased the chance of microburet seepage liquid virtually, thereby has influenced the accuracy and the accuracy of measurement result to a certain extent.
(4) graded tube of existing microburet adopts parallel Welding Structure usually with liquid injection pipe, consider that graded tube sign place can not weld, so can only be with glass Movable loop fixed form, this not only makes microburet, and the titration folder is upward fixing fortunately, and the as easy as rolling off a log buret that makes ruptures.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art part, and provide a kind of and can save chemical reagent in a large number, the discharging of waste liquid amount is little, can Continuous Titration, soda acid is general, and with the classical buret accuracy of measurement of the big capacity soda acid general accurate microburet suitable with precision.
The purpose of this utility model can reach by the following technical programs: the general accurate microburet of a kind of soda acid, mainly form by capillary glass graded tube (1), syringe (2), stop,threeway cover (3), fixed leg (4), perforated piston core (5), vertical eyelet (6), T type eyelet (7), plastic washer (8), adjusting nut (9), rubber washer (10), fluid tube (11), PVC capillary point mouth (12), short eyelet (13) and slotted hole eye (14); It is characterized in that: capillary glass graded tube (1) and syringe (2) are welded on the upper end of stop,threeway cover (3) in parallel, and the lower end of capillary glass graded tube (1) is fixing with syringe (2) welding by fixed leg (4); Be inserted with perforated piston core (5) in the stop,threeway cover (3), there are a vertical eyelet (6) and T type eyelet (7) in the middle part of perforated piston core (5); Be with plastic washer (8) on perforated piston core (5) the left end screw thread, clamping has rubber washer (10) between plastic washer (8) and adjusting nut (9); The lower end of stop,threeway cover (3) is welded with fluid tube (11), and fluid tube (11) lower end is with PVC capillary point mouth (12).
In conjunction with above utility model content as can be seen, the utility model has following advantage compared to existing technology:
(1) owing to adopted the perforated piston core (5) that has vertical eyelet (6) and T type eyelet (7), so just existing microburet is utilized the traditional approach of two piston control titration, changing one into is controlled by perforated piston core (5), this has significantly reduced the probability of piston leakage in the mensuration process, and simplified apparatus structure, simplified operating procedure.
(2) owing to utilize syringe to draw and the interpolation volumetric soiutions, guaranteed that not only volumetric soiutions can not volatilize and fallen to going up dust in air, and make the liquid level of liquid feeding end in the titration operation process, all the time directly do not act on ambient atmosphere, thus prevented effectively volumetric soiutions under atmospheric pressure in graded tube leakage problems.
(3) fluid tube (11) is that a kind of internal diameter suitable for reading and capillary glass graded tube (1) internal diameter are in full accord, the gradually thin glass tube of following bore, this design have solved prior art well and easily produced bubble and problem difficult and PVC capillary point mouth (12) interface kit in fluid tubes (11).
(4) design of PVC capillary point mouth (12), make liquid flow out to limit the quantity of and be controlled at every drop volume 0.0032～0.0036mL, this compares with the every drop volume 0.015～0.010mL of prior art, has greatly improved the precision and the degree of accuracy that the general accurate microburet of soda acid is measured.
Description of drawings
Fig. 1 is the front elevation of the general accurate microburet of soda acid.
Fig. 2 is the profile of the general accurate microburet stop,threeway cover of soda acid (3).
Fig. 3 is the profile behind the general accurate microburet perforated piston core of soda acid (5) half-twist.
Fig. 1, each label declaration is as follows in 2,3:
1. capillary glass graded tube, 2. syringe, 3. stop,threeway cover, 4. fixed leg, 5. perforated piston core, 6. vertical eyelet, 7.T type eyelet, 8. plastic washer, 9. adjusting nut, 10. rubber washer, 11. fluid tubes, 12.PVC capillary point mouth, 13. short eyelets, 14. slotted hole eyes.
The specific embodiment
Among Fig. 1, both are capillary glass graded tube (1) and syringe (2) parastate and are connected, the end of capillary glass graded tube (1) is welded on the left end that stop,threeway cover (3) is gone up the middle part, and the thin mouth of syringe (2) is welded on the right-hand member that stop,threeway cover (3) is gone up the middle part; Fixed leg (4) left end is vertically welded in capillary glass graded tube (1) lower end does not have the graduation mark place, and fixed leg (4) right-hand member is vertically welded in the outer of syringe (2) sleeve; The lower end of stop,threeway cover (3) is welded with fluid tube (11), fluid tube (11) welding position and capillary glass graded tube (1) are on same axial line, fluid tube (11) is that a kind of internal diameter suitable for reading and capillary glass graded tube (1) internal diameter are in full accord, the gradually thin glass tube of following bore, fluid tube (11) lower end are with PVC capillary point mouth (12).
Fig. 2, in 3, be inserted with perforated piston core (5) in the stop,threeway cover (3), perforated piston core (5) is made by polytetrafluoroethylene (PTFE) or other corrosion-resistant macromolecular materials, the middle part of perforated piston core (5) the vertical eyelet (6) of having taken back, the middle part T type eyelet (7) that taken over, T type eyelet (7) be one and axially be 45 with perforated piston core (5), the T type through hole that is formed at slotted hole eye (14) middle part with vertical mode UNICOM by short eyelet (13); Perforated piston core (5) left end car has screw thread, is with plastic washer (8) on the screw thread, and adjusting nut (9) and rubber washer (10) also all are enclosed within on perforated piston core (5) screw thread, in the middle of plastic washer (8) and adjusting nut (9) are clamped in rubber washer (10); Adjusting nut (9) is regulated the degree of tightness of perforated piston core (5) by the rotation on screw thread.
Claims (4)
1. the general accurate microburet of soda acid mainly is made up of capillary glass graded tube (1), syringe (2), stop,threeway cover (3), fixed leg (4), perforated piston core (5), vertical eyelet (6), T type eyelet (7), plastic washer (8), adjusting nut (9), rubber washer (10), fluid tube (11), PVC capillary point mouth (12), short eyelet (13) and slotted hole eye (14); It is characterized in that: capillary glass graded tube (1) and syringe (2) are welded on the upper end of stop,threeway cover (3) in parallel, and the lower end of capillary glass graded tube (1) is fixing with syringe (2) welding by fixed leg (4); Be inserted with perforated piston core (5) in the stop,threeway cover (3), there are a vertical eyelet (6) and T type eyelet (7) in the middle part of perforated piston core (5); Be with plastic washer (8) on perforated piston core (5) the left end screw thread, clamping has rubber washer (10) between plastic washer (8) and adjusting nut (9); The lower end of stop,threeway cover (3) is welded with fluid tube (11), and fluid tube (11) lower end is with PVC capillary point mouth (12).
2. the general accurate microburet of soda acid according to claim 1 is characterized in that: fixed leg (4) left end is vertically welded in capillary glass graded tube (1) lower end does not have the graduation mark place, and fixed leg (4) right-hand member is vertically welded in the outer of syringe (2) sleeve.
3. the general accurate microburet of soda acid according to claim 1, it is characterized in that: fluid tube (11) welding position and capillary glass graded tube (1) are on same axial line, fluid tube (11) is that a kind of internal diameter suitable for reading and capillary glass graded tube (1) internal diameter are in full accord, the gradually thin glass tube of following bore.
4. the general accurate microburet of soda acid according to claim 1, it is characterized in that: T type eyelet (7) is one and axially is 45 with perforated piston core (5), the T type through hole that is formed at slotted hole eye (14) middle part with vertical mode UNICOM by short eyelet (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200083235U CN201186217Y (en) | 2008-03-12 | 2008-03-12 | General accurate microburet for acid and alkali |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200083235U CN201186217Y (en) | 2008-03-12 | 2008-03-12 | General accurate microburet for acid and alkali |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201186217Y true CN201186217Y (en) | 2009-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200083235U Expired - Fee Related CN201186217Y (en) | 2008-03-12 | 2008-03-12 | General accurate microburet for acid and alkali |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201186217Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106047658A (en) * | 2016-06-13 | 2016-10-26 | 中国农业科学院油料作物研究所 | Production method and application of glass microscale aspirator |
| CN106732847A (en) * | 2016-12-22 | 2017-05-31 | 江南大学 | A kind of two-chamber injecting type pipette |
| CN109939759A (en) * | 2019-04-18 | 2019-06-28 | 马占龙 | A kind of two-tube acid-base universal burette of high-precision |
-
2008
- 2008-03-12 CN CNU2008200083235U patent/CN201186217Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106047658A (en) * | 2016-06-13 | 2016-10-26 | 中国农业科学院油料作物研究所 | Production method and application of glass microscale aspirator |
| CN106732847A (en) * | 2016-12-22 | 2017-05-31 | 江南大学 | A kind of two-chamber injecting type pipette |
| CN109939759A (en) * | 2019-04-18 | 2019-06-28 | 马占龙 | A kind of two-tube acid-base universal burette of high-precision |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090128 Termination date: 20100312 |