CN103047410B - Metering tube piston head structure for high-accuracy analysis meter - Google Patents
Metering tube piston head structure for high-accuracy analysis meter Download PDFInfo
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- CN103047410B CN103047410B CN201110307036.0A CN201110307036A CN103047410B CN 103047410 B CN103047410 B CN 103047410B CN 201110307036 A CN201110307036 A CN 201110307036A CN 103047410 B CN103047410 B CN 103047410B
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- top cover
- piston top
- head structure
- metering tube
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Abstract
The invention relates to a metering tube piston head structure for a high-accuracy analysis meter. The metering tube piston head structure comprises a piston top cover, a hard lining, a sealing ring and a body. The hard lining is fastened in an annular groove of the piston top cover through the inner lateral wall of the annular body, the sealing ring is installed on the outer lateral wall of the lining and in a space formed by the annular groove of the piston top cover, a short shaft of the piston top cover is screwed in a screw hole at the position of the axis of the body, and the upper end face of the body is contacted with the surface of the sealing ring. The metering tube piston head structure has the advantages of adopting teflon to manufacture a piston, simultaneously utilizing the hard lining and the elastic sealing ring, enabling a piston to have proper plasticity and further improving contact sealing performance of the piston and the metering tube wall due to the fact that fine edges are arranged on the outer lateral cylindrical face of the piston top cover. The piston adopts a split structure, and users can simply replace the piston top cover after the piston is damaged. The head structure is reasonable in structure, corrosion-resistant, abrasion-resistant, small in leakage rate and capable of being popularized and used in devices of various analysis instrument metering tubes.
Description
Technical field:
The present invention relates to a kind of physics of material or the investigative technique of chemical property, especially relate to a kind of ANALYZER gauge line piston crown structure.
Background technique:
Electrometric titration instrument is made up of sample injection unit, titration unit, measuring unit, control unit usually, wherein the titer reagent joined in measuring system is normally carried out accurate Calculation by the high-precision measuring pipe with piston by sample injection unit and measuring unit, the measuring accuracy of volume of titrant represents whole system measuring accuracy, and in gauge line, working life of piston head and precise motion have metering accuracy and have very important impact.In prior art, common piston head, by closely cooperating between O RunddichtringO and quantity tube, utilizes the frictional force between seal ring and quantity tube and pressure to guarantee sealing.The deficiency of this structure is: sealing ring material is difficult to select, the soft or hard of seal ring is directly connected to the friction between piston and quantity tube, and the reagent of some severe corrosive can produce destruction to different seal rings, piston is caused to occur creeping phenomenon, or because resistance brings stifled step or step-out phenomenon to too greatly control motor, have a strong impact on measuring accuracy, thus cause the inaccurate of whole measurement result.
Summary of the invention:
The object of the invention is to provide for prior art deficiency a kind of good airproof performance, long service life, ANALYZER gauge line piston crown structure that accuracy is high.
The object of the invention is to be realized by following measures: a kind of ANALYZER gauge line piston crown structure, it is characterized in that, it comprises piston top cover, hard liner, elastic seal ring, body; Described piston top cover lower end surface is provided with an annular groove, and piston top cover axle center place is provided with the minor axis of band external screw thread, hard liner body ringwise, and body is cylindrical body, and cylindrical body upper-end surface is provided with indent, and cylindrical body axle center place is provided with the screw of fixed piston top cover minor axis; Piston top cover adopts polytetrafluoroethylmaterial material to make; The madial wall of described hard liner is fastened on the annular groove madial wall of piston top cover, elastic seal ring is arranged in the space of liner outer wall and the formation of piston top bezel ring, connected in star, the minor axis of piston top cover screws in the screw at body axle center place, and body upper-end surface and elastic seal ring surface touch.
Described piston top cover mixed lateral column face is provided with one or some thin swords.
Described body lower end outside cylinder is provided with the thin sword with piston top cover equal number.
Compared with prior art, the ANALYZER gauge line piston crown structure that the present invention proposes, tool has the following advantages: the teflon 1) adopting mechanical property softer makes piston, employ hard liner and elastic seal ring simultaneously, piston is made to be provided with appropriate plasticity, the particularly thin sword that is provided with of piston top cover mixed lateral column face, improves piston and the sealing of measuring tube wall and contacting further; 2) this piston have employed Split type structure, generally only needs to replace piston top cover, the user cost of the high-quality piston greatly reduced after Remedy for Piston Damage; 3) piston that teflon makes has corrosion resistance, can protect other non-anti-corrosion material parts inner, avoid conventional piston head regularly to carry out the operation requirements cleaned.The present invention is rational in infrastructure, corrosion-resistant, wear-resisting, return leak rate little, can extended use in the equipment of all kinds of analytical instrument gauge line.
Accompanying drawing illustrates:
Fig. 1 is the example structure schematic diagram that the present invention proposes.
Fig. 2 is Figure 1A portion enlarged view.
Embodiment:
Below in conjunction with accompanying drawing, embodiment is elaborated:
In embodiments of the invention shown in Fig. 1 ~ Fig. 2, a kind of ANALYZER gauge line piston crown structure, it comprises: piston top cover 1, hard liner 2, elastic seal ring 3, body 4; Described piston top cover 1 lower end surface is provided with an annular groove 12, piston top cover axle center place is provided with the minor axis of band external screw thread, hard liner 2 body ringwise, and body 4 is cylindrical body, cylindrical body upper-end surface is provided with indent 41, and cylindrical body axle center place is provided with the screw of fixed piston top cover 1 minor axis; The madial wall of described hard liner 2 is fastened on the annular groove madial wall 12 of piston top cover 1, elastic seal ring 3 is arranged in the space of hard liner 2 outer wall and the formation of piston top bezel ring, connected in star 12, the minor axis of piston top cover 1 screws in the screw at body 4 axle center place, and body 4 upper-end surface and elastic seal ring surface touch.Hard liner in the present invention is mainly by force support, adopts hard metal or high duroplasts to make.Main Function makes O type circle carry out power bounce-back by liner and then prop up the main body of piston head cover; piston outer wall is after the deformation that causes because gauge line fabrication error or material expand with heat and contract with cold; external force acts on this hard lining components by elastic force inner potential and carries out reaction, utilizes the distortion of padding in outer wall and elastic force to guarantee not leak between piston and metering tube wall.Another effect of this structure is that O RunddichtringO does not contact with the direct of severe corrosive reagent, effectively extends the working life of seal ring.
The present invention takes following measure further: described piston top cover mixed lateral column face is provided with one or some thin swords 11.Described body lower end outside cylinder is provided with the thin sword 42 with piston top cover equal number, as shown in Figure 2.The thin sword of piston top cover and this outside is in the elastic range of piston; increase the contact strength with gauge line work circle matter; even if wear and tear after making piston use certain hour, also can form a circle protective seal ring because of small thin sword and tube wall surface of contact, increase the service life.
Described piston top cover adopts polytetrafluoroethylmaterial material to make.Teflon is anticorrosion soft material, and itself and metering tube wall working interface contact segment in this structure, namely limit wall is thinner, and the liner power of the O RunddichtringO of liner can fully be acted on, and is directly closely connected with metering tube wall under the effect of elastic force.Because character is softer, make piston have very strong plasticity, inner elastic ring can be coordinated, can greatly reduce the making tolerance of gauge line; Simultaneously due to its anti-corrosive properties, protect other not corrosion resistant parts not by the leaching evil of corrosive liquids.
Describe embodiments of the present invention by reference to the accompanying drawings above, the structure that embodiment provides is not construed as limiting the invention, and in related domain, those skilled in the art make various distortion within the scope of the appended claims or revise all in protection domain.
Claims (3)
1. an ANALYZER gauge line piston crown structure, is characterized in that, it comprises piston top cover, hard liner, elastic seal ring, body; Described piston top cover lower end surface is provided with an annular groove, piston top cover axle center place is provided with the minor axis of band external screw thread, hard liner body ringwise, body is cylindrical body, cylindrical body upper-end surface is provided with indent, cylindrical body axle center place is provided with the screw of fixed piston top cover minor axis, and piston top cover adopts polytetrafluoroethylmaterial material to make; The madial wall of described hard liner is fastened on the annular groove madial wall of piston top cover, elastic seal ring is arranged in the space of hard liner outer wall and the formation of piston top bezel ring, connected in star, the minor axis of piston top cover screws in the screw at body axle center place, and body upper-end surface and elastic seal ring surface touch.
2. ANALYZER gauge line piston crown structure according to claim 1, is characterized in that, described piston top cover mixed lateral column face is provided with one or some thin swords.
3. ANALYZER gauge line piston crown structure according to claim 1 and 2, it is characterized in that, described body lower end outside cylinder is provided with the thin sword of number identical with piston top cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110307036.0A CN103047410B (en) | 2011-10-11 | 2011-10-11 | Metering tube piston head structure for high-accuracy analysis meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110307036.0A CN103047410B (en) | 2011-10-11 | 2011-10-11 | Metering tube piston head structure for high-accuracy analysis meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103047410A CN103047410A (en) | 2013-04-17 |
| CN103047410B true CN103047410B (en) | 2015-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110307036.0A Active CN103047410B (en) | 2011-10-11 | 2011-10-11 | Metering tube piston head structure for high-accuracy analysis meter |
Country Status (1)
| Country | Link |
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| CN (1) | CN103047410B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742643B (en) * | 2014-01-14 | 2016-05-04 | 温州卓展机电科技有限公司 | A kind of tear drop bottle special piston |
| JP2020180600A (en) * | 2019-04-26 | 2020-11-05 | 株式会社神戸製鋼所 | Piston ring, reciprocating compressor, method for selecting piston ring, and method for evaluating life of piston ring |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2052449U (en) * | 1989-04-08 | 1990-02-07 | 西南石油学院 | Unitary piston with soft lip |
| US6926867B1 (en) * | 2001-10-30 | 2005-08-09 | World Precision Instruments, Inc. | Pipette piston seal assembly |
| WO2008076817A1 (en) * | 2006-12-18 | 2008-06-26 | Parker-Hannifin Corporation | Pipette seal |
| CN201090734Y (en) * | 2007-09-12 | 2008-07-23 | 宝钢集团上海第一钢铁有限公司 | Adjustable seal piston head |
| CN201707239U (en) * | 2010-03-12 | 2011-01-12 | 上海禾工科学仪器有限公司 | Dip stool piston head structure used for analytical instrument |
| CN202520934U (en) * | 2011-10-11 | 2012-11-07 | 上海禾工科学仪器有限公司 | Metering tube piston head structure for high-precision analyzer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITPC20040022A1 (en) * | 2004-05-26 | 2004-08-26 | Carlo Crespi | PISTON FOR DOSING EQUIPMENT IN PARTICULAR FOR THE FOOD AND / OR PHARMACEUTICAL SECTOR, WITH IMPROVED SEALING SYSTEMS |
| US7757710B2 (en) * | 2006-06-19 | 2010-07-20 | Tescom Corporation | High-pressure regulator |
-
2011
- 2011-10-11 CN CN201110307036.0A patent/CN103047410B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2052449U (en) * | 1989-04-08 | 1990-02-07 | 西南石油学院 | Unitary piston with soft lip |
| US6926867B1 (en) * | 2001-10-30 | 2005-08-09 | World Precision Instruments, Inc. | Pipette piston seal assembly |
| WO2008076817A1 (en) * | 2006-12-18 | 2008-06-26 | Parker-Hannifin Corporation | Pipette seal |
| CN201090734Y (en) * | 2007-09-12 | 2008-07-23 | 宝钢集团上海第一钢铁有限公司 | Adjustable seal piston head |
| CN201707239U (en) * | 2010-03-12 | 2011-01-12 | 上海禾工科学仪器有限公司 | Dip stool piston head structure used for analytical instrument |
| CN202520934U (en) * | 2011-10-11 | 2012-11-07 | 上海禾工科学仪器有限公司 | Metering tube piston head structure for high-precision analyzer |
Non-Patent Citations (2)
| Title |
|---|
| 《ZD-3自动电位滴定仪使用维护及常见故障维修》;单德杰;《宿州学院学报》;20090831;全文 * |
| 《ZWF──4型注射液微粒分析仪的常见故障及维修方法》;谭晨立等;《医疗设备信息》;19960228;全文 * |
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| Publication number | Publication date |
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| CN103047410A (en) | 2013-04-17 |
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