CN203532862U - Miniature tee valve - Google Patents
Miniature tee valve Download PDFInfo
- Publication number
- CN203532862U CN203532862U CN201320713045.4U CN201320713045U CN203532862U CN 203532862 U CN203532862 U CN 203532862U CN 201320713045 U CN201320713045 U CN 201320713045U CN 203532862 U CN203532862 U CN 203532862U
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- CN
- China
- Prior art keywords
- spool
- valve
- miniature
- valve body
- interface
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Abstract
The utility model provides a miniature tee valve which is used for titrators in electrochemical analysis. The miniature tee valve mainly comprises a cylindrical valve body, a valve spool, a compression spring and a compression cover, the top of the valve body is sealed, the upper end of the valve spool is conical, the lower end of the valve spool is cylindrical, three joints are formed in the valve body, an arc-shaped groove for switching the joints are formed in the conical portion of the valve spool, and the valve body and the valve spool are precisely made of corrosion-resistant materials such as PCTFE (polychlorotrifluoroethylene) and PTFE (polytetrafluoroethylene). The miniature tee valve is corrosion-resistant, fine in sealing performance, high in reliability, compact in structure and light in weight, does not need to be cleaned after being used for a long time and cannot leak when the environmental temperature changes, and high-precision requirements of the titrators are completely met.
Description
Technical field
The utility model relates to the miniature three-way valve that a kind of titrator is used, and belongs to electrochemical analytical instrument field.
Background technique
In the titrator of electrochemical analytical instrument, imbibition and the dropping liquid of titrant are switched by three-way valve.High-precision titrator is high, corrosion-resistant to three-way valve precision prescribed, good airproof performance, reliability is high, volume is little.The three-way valve used of tradition titrator is solenoid valve or by motor-driven plain triple valve.Solenoid valve is applied in and on titrator, has some shortcomings: reliability is low, and when solenoid valve open and close are moved, dropping liquid pipeline has a droplet solution a bit of solution that oozes or bounce back, and does not so just reach the high-precision requirement of titrator.Motor-driven plain triple valve is applied in and on titrator, also has some shortcomings: volume is large, not wear-resisting, there will be leakage when variation of ambient temperature is large, and through hole is arranged at valve body top, and seal spool is bad, easily pollutes.
Model utility content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides that a kind of volume is little, lightweight, wear-resisting, corrosion-resistant, good airproof performance, reliable operation, can meet the miniature three-way valve of the high-precision requirement of titrator.
The technical solution of the utility model is: miniature three-way valve, comprise valve body, spool, holddown spring, friction top, on described valve body, there are three interfaces, the curve bath that has switching interface on spool, its improvements are that described valve body is cylindrical body, body cavity top seal, described spool top is cone, bottom is cylindrical body, the cannelure that there is horizontal curve bath on cone surface and separates with curve bath, and the material of valve body and spool is wear-resisting, corrosion-resistant plastic.
On described valve body, three interfaces are positioned at same cross section, and first interface and the second interface angle are 90
0, the second interface and the 3rd interface angle are 90
0, the curve bath on spool cone is connected first, second interface, or connects second, third interface; The cone part of described spool becomes to be rotatably assorted with body cavity, and the barrel portion of spool becomes Spielpassung with body cavity; Longitudinal groove width 1～1.5mm on the cone of described spool, dark 0.5～1mm; Described wear-resisting, corrosion-resistant plastic is PCTFE or PTFE; The coupling shaft stretching out outside valve body is arranged at the bottom of described spool.
The beneficial effects of the utility model are: valve body profile is cylindrical, accomplish that compact structure, volume are little.Spool upper end is cone, and lower end is cylindrical body, reduces rubbing surface, regulates friction top, under spring compression, can keep the sealing of cone match, and rotates flexibly, guarantees reliable operation.Valve body lower end perforate packs spool into, and valve body not perforate of upper end makes valve core cone mating part effective sealing, airborne dust can not enter, valve can use for a long time not to be needed to clean, and the cannelure on valve core cone can avoid top to produce vapour lock, guarantees reliable operation.That valve body, spool adopt is wear-resisting, resistant material PCTFE, PTFE precision machining form, temperature influence not, and during temperature variation, valve there will not be leakage.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is A-A place sectional drawing in Fig. 1.
Embodiment
Referring to accompanying drawing, it is that cone, bottom are cylindrical spool 2 that the inner chamber of valve body 1 is equipped with top, regulates threaded friction top 3, and under spring 4 effects, valve core cone part becomes to be rotatably assorted with valve pocket, and column part becomes Spielpassung with valve pocket.Curve bath on valve core cone 6 is positioned at same cross section with first interface 8, the second interface 9, the 3rd interface 10 in cone, spool by bottom coupling shaft 5 under driven by motor rotatable 90
0, make curve bath 6 be communicated with respectively interface 8,9 and interface 9,10, thereby realize imbibition and the titration of titrator.On valve core cone, have and on cannelure 7, valve body, have mounting hole 11.Valve body material is PCTFE(polychlorotrifluoroethylene), valve core material is that PTFE(gets tetrafluoroethylene).
Claims (6)
1. a miniature three-way valve, comprise valve body, spool, holddown spring, friction top, on described valve body, there are three interfaces, the curve bath that has switching interface on spool, is characterized in that described valve body is cylindrical body, body cavity top seal, described spool top is cone, bottom is cylindrical body, the cannelure that there is horizontal curve bath on cone surface and separates with curve bath, and the material of valve body and spool is wear-resisting, corrosion-resistant plastic.
2. by miniature three-way valve described in claim 1, it is characterized in that on described valve body, three interfaces are positioned at same cross section, first interface and the second interface angle are 90
0, the second interface and the 3rd interface angle are 90
0, the curve bath on spool cone is connected first, second interface, or connects second, third interface.
3. by miniature three-way valve described in claim 1, it is characterized in that the cone part of described spool becomes to be rotatably assorted with body cavity, the barrel portion of spool becomes Spielpassung with body cavity.
4. by miniature three-way valve described in claim 1, it is characterized in that the longitudinal groove width 1～1.5mm on the cone of described spool, dark 0.5～1mm.
5. by miniature three-way valve described in claim 1, it is characterized in that described wear-resisting, corrosion-resistant plastic is PCTFE or PTFE.
6. by miniature three-way valve described in claim 1, it is characterized in that the coupling shaft stretching out outside valve body is arranged at the bottom of described spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320713045.4U CN203532862U (en) | 2013-11-13 | 2013-11-13 | Miniature tee valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320713045.4U CN203532862U (en) | 2013-11-13 | 2013-11-13 | Miniature tee valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203532862U true CN203532862U (en) | 2014-04-09 |
Family
ID=50419071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320713045.4U Expired - Fee Related CN203532862U (en) | 2013-11-13 | 2013-11-13 | Miniature tee valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203532862U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603970A (en) * | 2013-11-13 | 2014-02-26 | 江苏东华分析仪器有限公司 | Miniature three-way valve |
-
2013
- 2013-11-13 CN CN201320713045.4U patent/CN203532862U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603970A (en) * | 2013-11-13 | 2014-02-26 | 江苏东华分析仪器有限公司 | Miniature three-way valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20141113 |
|
| EXPY | Termination of patent right or utility model |