CN2804522Y - Mini plane reversal valve - Google Patents
Mini plane reversal valve Download PDFInfo
- Publication number
- CN2804522Y CN2804522Y CN 200420054305 CN200420054305U CN2804522Y CN 2804522 Y CN2804522 Y CN 2804522Y CN 200420054305 CN200420054305 CN 200420054305 CN 200420054305 U CN200420054305 U CN 200420054305U CN 2804522 Y CN2804522 Y CN 2804522Y
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- CN
- China
- Prior art keywords
- valve
- valve core
- moving
- valve plug
- movable valve
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a miniature plane reversal valve, which is mainly composed of a moving and a still valve cores and a moving and a still valve core seats, wherein the moving valve core is in contact with the still valve core in a plane type contact mode; the moving valve core is provided with arc-shaped slots which are communicated with two of the three valve interfaces arranged on the still valve core; a compression spring is arranged between the moving valve core and the moving valve core seat. The utility model is used for a potentiometric titrator in the electrochemical analysis. Because the planes of the moving and the still valve cores are in contact with each other, the temperature change can not affect planeness. When the utility model is used in the environment of large temperature difference for a long time, the sealing is reliable, the phenomena of liquid leakage and liquid escape can be avoided, the titration requirement of high precision can be satisfied and the utility model overcomes the defect that the sealing performance of the existing tapered reversing valve is greatly affected by temperature.
Description
Technical field
The utility model relates to the plane selector valve in a kind of automatical potentiometric titrimeter that is used for electrochemical analysis, the especially titrator.
Background technique
In the design of electrochemical analysis automatic titrator, passing through or blocking of control solution all is to rely on the switching of self-acting valve to realize.Employed self-acting valve in automatic titrator requires its opening and closing to get well, and execution quickly, no leakage, does not scurry liquid.Self-acting valve is common two kinds of forms, i.e. solenoid valve and selector valve, and concerning high-precision automatic titrator, solenoid valve generally is not suitable for using.
With regard to selector valve, be divided into two kinds of forms of plane selector valve and taper selector valve usually.Common use taper selector valve in homemade automatic titrator because this selector valve is simple in structure, is easy to make, and is easy to maintenance, and high-precision micro plane selector valve is not seen the use report.Yet there is a shortcoming that is difficult to overcome in the taper selector valve.Because each breadboard condition is not quite similar, differing greatly of ambient temperature winter and summer can not be in instrument in the air-conditioned environment always and use, and just because of the influence of this temperature difference, the taper selector valve can produce leakage, scurry the phenomenon of liquid.Trace it to its cause, because the spool of taper selector valve is a cone, spool is under the effect of temperature difference T, can produce big end and shrink (or expansion) inconsistent phenomenon of rate with the temperature of small end, and valve body often material is different, even material is the same, also can not produce the temperature contraction (or expand) synchronous with the large and small end of spool, will inevitably produce the gap like this, though there is the holddown spring can the compensated part gap, but can not eliminate fully, thereby under the bigger situation of the temperature difference, the taper selector valve can occur leakage inevitably or scurry the phenomenon of liquid.
The model utility content
The technical problems to be solved in the utility model is the deficiency that overcomes existing taper selector valve, provide a kind of and avoid because of temperature variation produces leakage, scurries the miniature planar selector valve of liquid phenomenon, this selector valve can satisfy the usage requirement of High Precision Automatic titrator fully.
The technical solution of the utility model is: the miniature planar selector valve, comprise spool, valve core case, improvements are that spool is divided into quiet spool and movable valve plug, quiet spool lower end surface contacts with movable valve plug upper-end surface plane type, three valve interfaces that tilt with axis are arranged on the quiet spool, and the movable valve plug upper-end surface is provided with curve bath, and this curve bath is communicated with two valve interfaces on the quiet spool, the movable valve plug outside is provided with the movable valve plug seat, between movable valve plug and the movable valve plug seat pressure spring is arranged.
Further scheme is: quiet spool outside is provided with quiet valve core case, and locating stud is arranged between the two, and quiet valve core case underpart becomes rotary type to cooperate with movable valve plug seat upper end portion; Movable valve plug and movable valve plug seat upper end portion are provided with connecting pin; Quiet valve core case upper end portion is provided with friction top.
Adopt technique scheme, because plane type contact between the dynamic and static spool, fit tightly after the two plane fine finishing, even temperature variation, may cause the gap on two planes, but can not influence its planeness, and the gap on two planes can be compensated by the pressure of spring, so just, can remain good sealing property, avoid leakage, scurry the generation of liquid phenomenon.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is an A-A place sectional drawing among Fig. 1;
Fig. 3 is a B-B place sectional drawing among Fig. 1.
Embodiment
As figure, quiet spool 1 and movable valve plug 9 plane contact, quiet spool is located in the quiet valve core case 3, and locating stud 2 is arranged between the two, and is compressed by friction top 5, and movable valve plug is located in the movable valve plug seat 10, and connecting pin 8 and pressure spring 4 are arranged between the two; Movable valve plug seat upper end portion becomes to be rotatably assorted with quiet valve core case underpart, and the rotary spacing piece is arranged.Quiet spool is provided with three valve interfaces 6 that tilt with axis, be mutually 120 °, wherein valve interface 6-1,6-2,6-3 are connected with titration cell, propulsion device, solution bottle respectively when using, the movable valve plug upper-end surface is provided with curve bath 7, this curve bath connecting valve interface 6-1 and 6-2, perhaps connecting valve interface 6-2 and 6-3; When titrator is carried out the titration program, curve bath connecting valve interface 6-1 and 6-2, and valve interface 6-3 closes, at this moment, locomotive piston advances, and titrating solution is added drop-wise in the titration cell; When titrator was carried out non-titration program, movable valve plug servo valve core print seat was by 120 ° of driven by motor rotations, curve bath connecting valve interface 6-2 and 6-3, and valve interface 6-1 closes, at this moment, locomotive piston retreats, and titrating solution is evacuated to the propulsion device from the solution bottle.Because of the sound valve core chamber seals reliably, no gap, temperature influence can not produce leakage, scurry the liquid phenomenon.
Claims (4)
1, a kind of miniature planar selector valve, comprise spool, valve core case, it is characterized in that: spool is divided into quiet spool and movable valve plug, quiet spool lower end surface contacts with movable valve plug upper-end surface plane type, three valve interfaces that tilt with axis are arranged on the quiet spool, and the movable valve plug upper-end surface is provided with curve bath, and this curve bath is communicated with two valve interfaces on the quiet spool, the movable valve plug outside is provided with the movable valve plug seat, between movable valve plug and the movable valve plug seat pressure spring is arranged.
2, miniature planar selector valve according to claim 1 is characterized in that described quiet spool outside is provided with quiet valve core case, and locating stud is arranged between the two, and quiet valve core case underpart becomes rotary type to cooperate with movable valve plug seat upper end portion.
3, miniature planar selector valve according to claim 1 is characterized in that described movable valve plug and movable valve plug seat upper end portion are provided with connecting pin.
4, miniature planar selector valve according to claim 1 is characterized in that described quiet valve core case upper end portion is provided with friction top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420054305 CN2804522Y (en) | 2004-12-13 | 2004-12-13 | Mini plane reversal valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420054305 CN2804522Y (en) | 2004-12-13 | 2004-12-13 | Mini plane reversal valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2804522Y true CN2804522Y (en) | 2006-08-09 |
Family
ID=36909814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420054305 Expired - Fee Related CN2804522Y (en) | 2004-12-13 | 2004-12-13 | Mini plane reversal valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2804522Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086943A (en) * | 2009-12-03 | 2011-06-08 | 株式会社鹭宫制作所 | Conversion valve |
| CN103603970A (en) * | 2013-11-13 | 2014-02-26 | 江苏东华分析仪器有限公司 | Miniature three-way valve |
| CN106382391A (en) * | 2016-11-04 | 2017-02-08 | 上海化工研究院 | Three-way planar reversing valve |
| CN111505201A (en) * | 2020-04-24 | 2020-08-07 | 李莉 | Potentiometric titrator structure capable of automatically cleaning and discharging waste |
-
2004
- 2004-12-13 CN CN 200420054305 patent/CN2804522Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086943A (en) * | 2009-12-03 | 2011-06-08 | 株式会社鹭宫制作所 | Conversion valve |
| CN103603970A (en) * | 2013-11-13 | 2014-02-26 | 江苏东华分析仪器有限公司 | Miniature three-way valve |
| CN106382391A (en) * | 2016-11-04 | 2017-02-08 | 上海化工研究院 | Three-way planar reversing valve |
| CN111505201A (en) * | 2020-04-24 | 2020-08-07 | 李莉 | Potentiometric titrator structure capable of automatically cleaning and discharging waste |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |