CN101482539A - Sampling injector of titration apparatus - Google Patents
Sampling injector of titration apparatus Download PDFInfo
- Publication number
- CN101482539A CN101482539A CNA2008100194622A CN200810019462A CN101482539A CN 101482539 A CN101482539 A CN 101482539A CN A2008100194622 A CNA2008100194622 A CN A2008100194622A CN 200810019462 A CN200810019462 A CN 200810019462A CN 101482539 A CN101482539 A CN 101482539A
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- CN
- China
- Prior art keywords
- piston rod
- piston
- piston cap
- injector
- titration apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention discloses a sample-injection injector of titration device, comprising a glass tube, a piston rod, characterized in that: a hollow thin-wall piston cap is set on the head of the piston rod by a seal ring and the piston cap is engineering plastics, preferred polytetrafluoroethylene, and the sidewall thickness is 0.5-1.0mm, and the top is of great circle arc convex structure and a cone step on the end of inner cavity obstructed by the piston rod head step surface and the outside cylindrical surface have a convex edge and a blind hole is set in the center of the head of the piston rod. The injector is used for the titration device for electrochemical analysis and realizes the sample injection of the titrant with features of agile use, good corrosion-protection and wear resistance, no leakage, no bubble, good utilization property, easy production and long life and the injector can fully accords with the requirement of the high-precision titrator.
Description
Technical field
The present invention relates to be used for the sampling injector of the titration apparatus of electrochemical analysis, particularly titration apparatus.
Background technology
In electrochemical analysis, titrimetry is to use the standard solution titration detected solution, makes that two kinds of solution neutralize, precipitation, redox or complex reaction.When being titrated to terminal point, have special reacting phenomenon, lead the sudden change of temperature with solution or the like as electrode potential, electricity.The consumption of titrant during according to the concentration of titrant and terminal point can be obtained the concentration of detected solution.Therefore, no matter be the titration apparatus of which kind of form, all need a sampling injector simple and reliable, easy to maintenance.And the piston of sampling injector and glass tube are again one of critical components of decision sampling injector.
Usually the sampling injector piston in the titration apparatus of seeing is to adopt cylindrical structural, adds the step of twice projection at columniform outside surface.But still be that unavoidable generation leakage, interface come off, shortcomings such as bubble appear in the piston head end in use.Secondly, the piston of this form has proposed higher requirement to the circularity and the cylindricity of sampling injector glass tube, has brought thus to be unfavorable for the popularizing and using in the titrimetry field of high-precision titrator.
Summary of the invention
It is easy to the purpose of this invention is to provide a kind of making, the sampling injector of the titration apparatus that usability is good, the life-span is long, reliability is high.
Technical scheme of the present invention is: the sampling injector of titration apparatus comprises glass tube, piston rod, improvements are that the head of piston rod is provided with the hollow thin-wall piston cap, rubber seal is arranged between the two, the piston cap material is engineering plastics, 2～3 road circular fins are arranged on the external cylindrical surface of piston cap, and this fin becomes no gap to be slidingly matched with the glass tube inwall.
Further scheme is: there is the circular step of band tapering at described piston cap lumen port place, and the step surface of this step and piston rod head is stuck; The piston cap top is the orthodrome bulge-structure; Piston cap side thickness 0.5～1.0mm; The piston cap material is a teflon; There is blind hole the piston rod head center.
Adopt above technical scheme, piston cap is enclosed within piston rod head, because step surface chucking is arranged, and rubber seal is housed between the two, and certain elasticity is arranged, like this piston rod combine with piston cap firm, can loose or dislocation after the long-term motion yet.Piston cap adopts polytetrafluoroethylmaterial material, the anticorrosion of acid-proof alkali prevention, and wearing quality is good, long service life; The piston cap sidewall is thinner, and pliability is arranged, and owing to piston rod part blind hole is arranged during assembling, air is compressed, and makes the piston cap internal pressure higher, guarantees that further piston cap and glass tube inwall are adjacent to, and the circularity of glass tube is required relative reduction with cylindricity, make easily; The ring-type rib in the piston cap outside can guarantee sealing, and is non-leakage, reduces resistance again, uses flexibly; The circular arc projection on piston cap top can make the solution trend mild, avoids disturbance, can not produce bubble.In a word, this syringe usability is good, and the reliability height meets the needs of high precision titrator fully.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
Embodiment
Referring to accompanying drawing, the inner chamber of glass tube 1 is equipped with piston rod 2, piston rod head is provided with hollow thin-wall piston cap 4, rubber seal 3 is arranged between the two, and piston cap is made by teflon, side thickness 0.8mm, there are three road circular fins in the outside, the top is the orthodrome bulge-structure, and the lumen port place has the step surface of band circular step of tapering and piston rod head stuck, and there is blind hole 5 the piston rod head center.
Claims (6)
1, a kind of sampling injector of titration apparatus, comprise glass tube, piston rod, the head that it is characterized in that piston rod is provided with the hollow thin-wall piston cap, rubber seal is arranged between the two, the piston cap material is engineering plastics, 2～3 road circular fins are arranged on the external cylindrical surface of piston cap, and this fin becomes no gap to be slidingly matched with the glass tube inwall.
2, by the sampling injector of the described titration apparatus of claim 1, it is characterized in that there is the circular step of band tapering at described piston cap lumen port place, the step surface of this step and piston rod head is stuck.
3, by the sampling injector of the described titration apparatus of claim 1, it is characterized in that the piston cap top is the orthodrome bulge-structure.
4, by the sampling injector of the described titration apparatus of claim 1, it is characterized in that piston cap side thickness 0.5～1.0mm.
5, by the sampling injector of the described titration apparatus of claim 1, it is characterized in that the piston cap material is a teflon.
6, by the sampling injector of the described titration apparatus of claim 1, it is characterized in that there is blind hole the piston rod head center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100194622A CN101482539A (en) | 2008-01-10 | 2008-01-10 | Sampling injector of titration apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100194622A CN101482539A (en) | 2008-01-10 | 2008-01-10 | Sampling injector of titration apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101482539A true CN101482539A (en) | 2009-07-15 |
Family
ID=40879745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100194622A Pending CN101482539A (en) | 2008-01-10 | 2008-01-10 | Sampling injector of titration apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101482539A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048068A (en) * | 2014-06-06 | 2014-09-17 | 徐州顺风阀门有限公司 | Monomer four-way reversing valve |
| CN112027298A (en) * | 2020-08-18 | 2020-12-04 | 浙江欣昱科技有限公司 | Glass vacuum bottle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2854598Y (en) * | 2005-11-24 | 2007-01-03 | 江苏江分电分析仪器有限公司 | Sample injector of titration device |
| EP1825915A2 (en) * | 2006-02-28 | 2007-08-29 | Eppendorf Ag | System and method for titrating fluids |
| CN201150861Y (en) * | 2008-01-10 | 2008-11-19 | 江苏江分电分析仪器有限公司 | Sample injector of titration apparatus |
-
2008
- 2008-01-10 CN CNA2008100194622A patent/CN101482539A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2854598Y (en) * | 2005-11-24 | 2007-01-03 | 江苏江分电分析仪器有限公司 | Sample injector of titration device |
| EP1825915A2 (en) * | 2006-02-28 | 2007-08-29 | Eppendorf Ag | System and method for titrating fluids |
| CN201150861Y (en) * | 2008-01-10 | 2008-11-19 | 江苏江分电分析仪器有限公司 | Sample injector of titration apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048068A (en) * | 2014-06-06 | 2014-09-17 | 徐州顺风阀门有限公司 | Monomer four-way reversing valve |
| CN112027298A (en) * | 2020-08-18 | 2020-12-04 | 浙江欣昱科技有限公司 | Glass vacuum bottle |
| CN112027298B (en) * | 2020-08-18 | 2022-07-29 | 浙江欣昱科技有限公司 | Glass vacuum bottle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20090715 |