CN102537421B - High precision three-way valve - Google Patents
High precision three-way valve Download PDFInfo
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- CN102537421B CN102537421B CN 201110441135 CN201110441135A CN102537421B CN 102537421 B CN102537421 B CN 102537421B CN 201110441135 CN201110441135 CN 201110441135 CN 201110441135 A CN201110441135 A CN 201110441135A CN 102537421 B CN102537421 B CN 102537421B
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- spool
- burette
- cover plate
- end cover
- connecting end
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Abstract
The invention relates to a high precision three-way valve which comprises a valve unit and a titrating unit and is characterized in that the valve unit is connected with the titrating unit through a cover board at the connecting end; when in use, the high precision three-way valve can be used for interchanging and updating various liquid only by being taken down from analysis equipment and does not need to be cleaned by liquid medicine, so that the production cost is saved and the high precision three-way valve has simple structure.
Description
Technical field
The invention belongs to technical field of analytical instruments, is exactly specifically a kind of for analytical instrument liquid highi degree of accuracy volume metering high precision three-way valve.
Background technique
Commonly use in analytical equipment and get liquid to liquid medium class measuring apparatus, the liquid medium class measuring apparatus at present domestic and international analytical instrument is mostly that pump separates mutually with valve body, and whole device overall volume is large; When instrument is analyzed, often to change heterogeneity reagent according to the article that will analyze, the structure of disperseing due to plunger pump and valve must have a certain amount of residual solution to stay in measuring apparatus when causing changing reagent at every turn, common way is first washing unit after changing solution, constantly dilute the front with the solution newly changed exactly and stay residual solution in device, to repeatedly clean in general can drop into for 4 to 5 times to analyze next time and use, the analysis precision when measuring to avoid affecting.
But in the analysis of pharmaceutical industry and some chemical industry product, the price of some solution to be analyzed is very expensive, if a large amount of washing as cleaning solution can cause huge waste, has increased cost of production.
Summary of the invention
The purpose of this invention is to provide a kind of high precision three-way valve, when reagent is analyzed, do not need valve body is just cleaned and to change solution, both saved cost, avoid again cleaning and lose time.
Technological scheme
in order to realize above-mentioned technical purpose, the present invention has designed a kind of high precision three-way valve, it comprises valve unit and titration unit, it is characterized in that: described valve unit and titration unit link together by the connecting end cover plate, valve unit comprises spool, the spool lower end has the spill draw-in groove, coupling links together by draw-in groove and spool, after being fixed together, coupling and spool be contained in the valve seat shell, spool platform cone section is stretched out the valve seat shell and is fixed in the connecting end cover plate, the other end that coupling is connected with spool stretches out valve seat shell bottom outlet, valve seat shell bottom orifice is equipped with lock screw, coupling lever path portion cover has spring, spring is contained on lock screw, have one section flow channel on described spool platform cone section outer surface, on described connecting end cover plate with spool platform cone section outer surface on the flow channel corresponding position have metering orifice, in the titration unit of metering orifice and the connecting end cover plate the other end, the burette inner chamber communicates, burette is equipped with the burette overcoat outward, the burette bottom is contained on the burette end liner, piston is housed in burette, piston is connected with piston rod, and burette substrate and burette are sleeved on outward in the tightening nut inner chamber, and piston rod passes the tightening nut lumen orifice,
Spool can be in the connecting end cover plate rotates 90 ° around self axis, in 90 ° of processes of valve core rotation, when initial on spool flow channel communicate with liquid intake line on the connecting end cover plate, do not communicate with the liquid discharge tube road, communicate with the liquid exhausting pipes road after turning over 90 °, do not communicate with the liquid intake line on the connecting end cover plate, in 90 ° of processes of valve core rotation, flow channel is connected all the time with metering orifice on the connecting end cover plate.
Further, between described spring and lock screw, spring pad is housed.
Further, between described spool platform cone paragraph header section and connecting end cover plate, an O type circle is housed, between spool platform cone section bottom and connecting end cover plate, the 2nd O type circle is housed.
Further, the 3rd O type circle is housed between described burette and connecting end cover plate.
Further, described burette overcoat is screwed on the connecting end cover plate, between screw and connecting end cover plate, pad is housed, and valve screw countersunk head is housed on screw countersunk head groove.
Further, described burette puts outward shade is housed.
Further, described piston rod overcoat has silicone rubber O type circle.
Further, the 4th O type circle is housed between described burette and burette end liner.
Beneficial effect
As long as take off from analytical instrument the exchange renewal that high precision three-way valve provided by the invention just can be used for various liquid, do not need to clean with liquid again when the present invention uses, saved cost of production, simple in structure.
Description of drawings
Accompanying drawing 1 is stereogram of the present invention.
Accompanying drawing 2 is master's apparent direction structural representation of the present invention
Accompanying drawing 3 is looked up the direction structure schematic diagram for the present invention
Accompanying drawing 4 is imbibition status architecture schematic diagram of the present invention.
Accompanying drawing 6 is spool plan view of the present invention.
Accompanying drawing 7 is spool plan view of the present invention.
Accompanying drawing 8 is connecting end cover plate plate plan view of the present invention.
Accompanying drawing 9 for A in connecting end cover plate plate plan view of the present invention to sectional view.
Mounting structure schematic diagram when accompanying drawing 10 uses for the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
as accompanying drawing 1, 2, 3, 6, 7, shown in 8 and 9, a kind of high precision three-way valve, it comprises valve unit and titration unit, wherein, described valve unit and titration unit link together by connecting end cover plate 1, described valve unit comprises spool 2, spool 2 lower ends have the spill draw-in groove, coupling 3 links together by draw-in groove and spool 2, after being fixed together, coupling 3 and spool 2 be contained in valve seat shell 4, 2 cone sections of spool are stretched out valve seat shell 4 and are fixed in connecting end cover plate 1, between 2 cone paragraph header sections of spool and connecting end cover plate 1, an O type circle 2a is housed, between 2 cone section bottoms of spool and connecting end cover plate 1, the 2nd O type circle 2b is housed.
The other end that coupling 3 is connected with spool 2 stretches out valve seat shell 4 bottom outlets, and valve seat shell 4 bottom orifices are equipped with lock screw 6, and coupling 3 bar path portion covers have spring 7, and spring 7 is contained on lock screw 6, and 6 of spring 7 and lock screws are equipped with spring pad 7a,
Have one section flow channel 201 on 2 cone section outer surfaces of described spool; On described connecting end cover plate 1 with 2 of spools cone section outer surfaces on flow channel 201 corresponding positions have metering orifice 101, in the titration unit of metering orifice 101 and connecting end cover plate 1 the other end, burette 8 inner chambers communicate, the 3rd O type circle 8a is housed between burette 8 and connecting end cover plate 1, the outer burette overcoat 9 that is equipped with of burette 8, shade 9a is housed on burette overcoat 9, burette overcoat 9 is fixed on connecting end cover plate 1 by screw 16, between screw 16 and connecting end cover plate 1, pad 17 is housed, on screw 16 countersunk head grooves, valve screw countersunk head 18 is housed.
Spool 2 can be in connecting end cover plate 1 rotates 90 ° around self axis, spool 2 rotates in 90 ° of processes, when initial on spool 2 flow channel 201 communicate with liquid intake line 14 on connecting end cover plate 1, do not communicate with liquid discharge tube road 15, communicate with liquid exhausting pipes road 15 after turning over 90 °, do not communicate with the liquid intake line 14 on connecting end cover plate 1, rotate in 90 ° of processes at spool 2, flow channel 201 is connected all the time with metering orifice 101 on connecting end cover plate 1.
working procedure of the present invention is when the imbibition state as shown in attached Figure 4 and 5, flow channel 201 communicates with liquid intake line 14 on connecting end cover plate 1, do not communicate with liquid discharge tube road 15 and twitch piston rod 12 and move downward, liquid is entered in burette 8 from intake line 14, after sucking appropriate amount of fluid, after rotating joint 3 nine ten degree, flow channel 201 communicates with liquid exhausting pipes road 15, do not communicate with the liquid intake line 14 on connecting end cover plate 1, piston rod 12 moves upward and promotes liquid from metering orifice 101 process discharge pipes 15 eliminatings, after drained, rotating joint 3 nine ten degree repeat the imbibition process again, complete periodic duty.
As shown in Figure 10, as long as take off from analytical instrument the exchange renewal that high precision three-way valve provided by the invention just can be used for various liquid, do not need to clean with liquid again when the present invention uses, saved cost of production, simple in structure.
The scope of protection of the invention is not limited only to the technological scheme that the present embodiment relates to, and all are subjected to the technical characteristics that the present invention enlightens all to fall within protection scope of the present invention.
Claims (8)
1. high precision three-way valve, it comprises valve unit and titration unit, it is characterized in that: described valve unit and titration unit link together by connecting end cover plate (1);
described valve unit comprises spool (2), spool (2) lower end has the spill draw-in groove, coupling (3) links together by draw-in groove and spool (2), after being fixed together, coupling (3) and spool (2) be contained in valve seat shell (4), spool (2) platform cone section is stretched out valve seat shell (4) and is fixed in connecting end cover plate (1), the other end that coupling (3) is connected with spool (2) stretches out valve seat shell (4) bottom outlet (5), valve seat shell (4) bottom outlet (5) locates to be equipped with lock screw (6), coupling (3) bar path portion cover has spring (7), spring (7) is contained on lock screw (6), have one section flow channel (201) on described spool (2) platform cone section outer surface, described connecting end cover plate (1) upper with spool (2) platform cone section outer surface on flow channel (201) corresponding position have metering orifice (101), in the titration unit of metering orifice (101) and connecting end cover plate (1) the other end, burette (8) inner chamber communicates, the outer burette overcoat (9) that is equipped with of burette (8), burette (8) bottom is contained on burette end liner (10), piston (11) is housed in burette (8), piston (11) is connected with piston rod (12), burette substrate (10) and burette overcoat (9) are contained in tightening nut (13) inner chamber, piston rod (12) passes tightening nut (13) lumen orifice,
spool (2) can be in connecting end cover plate (1) rotates 90 ° around self axis, spool (2) rotates in 90 ° of processes, the upper flow channel (201) of spool when initial (2) communicates with liquid intake line (14) on connecting end cover plate (1), do not communicate with liquid discharge tube road (15), communicate with liquid discharge tube road (15) after turning over 90 °, do not communicate with the liquid intake line (14) on connecting end cover plate (1), rotate in 90 ° of processes at spool (2), flow channel (201) is connected all the time with metering orifice (101) on connecting end cover plate (1).
2. a kind of high precision three-way valve as claimed in claim 1, is characterized in that: between described spring (7) and lock screw (6), spring pad (7a) is housed.
3. a kind of high precision three-way valve as claimed in claim 1, it is characterized in that: between described spool (2) platform cone paragraph header section and connecting end cover plate (1), an O type circle (2a) is housed, between spool (2) platform cone section bottom and connecting end cover plate (1), the 2nd O type circle (2b) is housed.
4. a kind of high precision three-way valve as claimed in claim 1, is characterized in that: the 3rd O type circle (8a) is housed between described burette (8) and connecting end cover plate (1).
5. a kind of high precision three-way valve as claimed in claim 1, it is characterized in that: described burette overcoat (9) is fixed on connecting end cover plate (1) by screw (16), between screw (16) and connecting end cover plate (1), pad (17) is housed, on screw (16) countersunk head groove, valve screw countersunk head (18) is housed.
6. a kind of high precision three-way valve as claimed in claim 1, is characterized in that: shade (9a) is housed on described burette overcoat (9).
7. a kind of high precision three-way valve as claimed in claim 1, it is characterized in that: described piston rod (12) overcoat has silicone rubber O type circle (12a).
8. a kind of high precision three-way valve as claimed in claim 1, is characterized in that: the 4th O type circle (10a) is housed between described burette (8) and burette end liner (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110441135 CN102537421B (en) | 2011-12-23 | 2011-12-23 | High precision three-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110441135 CN102537421B (en) | 2011-12-23 | 2011-12-23 | High precision three-way valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102537421A CN102537421A (en) | 2012-07-04 |
| CN102537421B true CN102537421B (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110441135 Active CN102537421B (en) | 2011-12-23 | 2011-12-23 | High precision three-way valve |
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| CN (1) | CN102537421B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093166A (en) * | 1993-03-26 | 1994-10-05 | 马德举 | Titration apparatus |
| CN201028058Y (en) * | 2007-02-09 | 2008-02-27 | 沈民强 | Multi-pass valve |
| CN201307073Y (en) * | 2008-11-27 | 2009-09-09 | 上海精密科学仪器有限公司 | High-accuracy quantitative sampling device |
| CN201316625Y (en) * | 2008-11-28 | 2009-09-30 | 上海精密科学仪器有限公司 | Titration device |
| CN201364336Y (en) * | 2009-01-20 | 2009-12-16 | 郭永亮 | Dedicated metering device for automatic water quality analyzer |
| CN202432022U (en) * | 2011-12-23 | 2012-09-12 | 上海仪电科学仪器股份有限公司 | High-precision three-way valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01282450A (en) * | 1988-05-10 | 1989-11-14 | G R:Kk | Analysis container |
-
2011
- 2011-12-23 CN CN 201110441135 patent/CN102537421B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093166A (en) * | 1993-03-26 | 1994-10-05 | 马德举 | Titration apparatus |
| CN201028058Y (en) * | 2007-02-09 | 2008-02-27 | 沈民强 | Multi-pass valve |
| CN201307073Y (en) * | 2008-11-27 | 2009-09-09 | 上海精密科学仪器有限公司 | High-accuracy quantitative sampling device |
| CN201316625Y (en) * | 2008-11-28 | 2009-09-30 | 上海精密科学仪器有限公司 | Titration device |
| CN201364336Y (en) * | 2009-01-20 | 2009-12-16 | 郭永亮 | Dedicated metering device for automatic water quality analyzer |
| CN202432022U (en) * | 2011-12-23 | 2012-09-12 | 上海仪电科学仪器股份有限公司 | High-precision three-way valve |
Non-Patent Citations (1)
| Title |
|---|
| JP平1-282450A 1989.11.14 |
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| Publication number | Publication date |
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| CN102537421A (en) | 2012-07-04 |
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