CN201307107Y - On-line automatic titrator - Google Patents
On-line automatic titrator Download PDFInfo
- Publication number
- CN201307107Y CN201307107Y CNU2008201547129U CN200820154712U CN201307107Y CN 201307107 Y CN201307107 Y CN 201307107Y CN U2008201547129 U CNU2008201547129 U CN U2008201547129U CN 200820154712 U CN200820154712 U CN 200820154712U CN 201307107 Y CN201307107 Y CN 201307107Y
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- unit
- measuring
- titration
- line automatic
- sample injection
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- Expired - Fee Related
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Abstract
The utility model discloses an on-line automatic titrator which comprises a sample injection unit, a titration unit, a measuring unit and a control unit. The sample injection unit, the titration unit and the measuring unit are connected with the control unit; the sample injection unit sequentially comprises a sample injection electromagnetic valve, a peristaltic pump and a ration cup; the sample injection unit is connected with a measuring cup through an overflow port formed at the bottom of the ration cup; the titration unit comprises a linear step motor and a piston pump titration device; a piston rod of the piston pump titration device is connected with an output shaft of the linear step motor; and the piston pump titration device is connected with the measuring cup through a buret. The on-line automatic titrator can ensure very high sample injection accuracy, and can ensure that the ration reproducibility is within 0.2 percent without being influenced by application duration; and the on-line automatic titrator has the beneficial effects of simple structure, easy maintenance, long service life, and greatly lowered use cos.
Description
Technical field
The utility model relates to a kind of titrator, specifically, relates to a kind of on-line automatic titrator.
Background technology
Existing on-line automatic titrator comprises sample injection unit, titration unit, measuring unit and control module, sample injection unit is by peristaltic pump sample directly to be added in the measuring cup, and the titration unit is by another peristaltic pump titration reagent directly to be added drop-wise in the measuring cup.Because there is the poor repeatability of timing sampling in peristaltic pump, and service time is long more, poorer and working time of its accuracy and repeatability is long also can to make defective such as pump line distortion, so the accuracy of the sampling of above-mentioned on-line automatic titrator and titration is difficult to be guaranteed.At present, be the accuracy that guarantees that on-line automatic titrator is analyzed, the general method of constantly changing pump line that adopts, this has not only increased the maintenance workload of on-line automatic titrator, has also increased use cost, has reduced the serviceable life of on-line automatic titrator.Therefore, a kind of precision of analysis height is developed in market in urgent need, use cost is low and the on-line automatic titrator of long service life.
The utility model content
The technical problems to be solved in the utility model provides a kind of precision of analysis height, use cost is low and the on-line automatic titrator of long service life, to overcome above-mentioned existing in prior technology defective and to satisfy the demand in market.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is as follows:
The on-line automatic titrator that the utility model provides, comprise sample injection unit, titration unit, measuring unit and control module, and sample injection unit, titration unit and measuring unit all are connected with control module, it is characterized in that: described sample injection unit is made up of solenoid valve for sampling, peristaltic pump, Measuring glass successively, and sample injection unit is connected with measuring cup by the overflow vent that is located at the Measuring glass bottom; Described titration unit is made up of linear stepping motor and piston pump titration apparatus, and the piston rod of piston pump titration apparatus is connected with the output shaft of linear stepping motor, and the piston pump titration apparatus is connected with measuring cup by buret.
Described Measuring glass is made up of two cups up and down, and is provided with the underflow head piece in the bottom that the sidepiece of last cup is provided with overflow vent and lower cup body.
The sample introduction pipe that is connected between the overflow vent of described Measuring glass bottom and measuring cup is provided with the application of sample solenoid valve.
Described linear stepping motor adopts screw drive, and roller-compaction of screw rod.
Preferably be provided with the crack nut that oppositely disappears on the described screw rod.
The piston tube of described piston pump titration apparatus is the right cylinder hollow glass tube, and the internal diameter of glass tube immobilizes.
Compared with prior art, the beneficial effects of the utility model are as follows:
1) because sample injection unit of the present utility model is at first sample to be joined in the Measuring glass by peristaltic pump, with the overflow method measuring cup is carried out quantitative sample injection then, because of the overflow vent bore of Measuring glass very little, therefore sample injection unit of the present utility model can guarantee very high sample introduction accuracy, quantitative repeatability is guaranteed in 0.2%, be not subjected to the influence of length service time, it is long more to have solved existing quantitative poor repeatability of peristaltic pump and service time, its accuracy and repeated worse defective.
2) owing to directly promoting the piston pump titration apparatus by linear stepping motor, titration of the present utility model unit carries out titration, because of the transmission accuracy of linear stepping motor can reach 0.0005mm/mm, highest resolution can reach 0.0015mm, the resolution that drips volume can reach 0.0003ml, so the utility model has improved the accuracy of titration greatly.
3) the utility model is simple in structure, safeguards that long service life greatly reduces use cost easily.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1. solenoid valve for sampling; 2. peristaltic pump; 3. Measuring glass; 4. measuring cup; 5. linear stepping motor; 6. piston pump titration apparatus; 7. buret; 8-1. last overflow vent; 8-2. underflow head piece; 9. application of sample solenoid valve; 10. control module.
Embodiment
Below in conjunction with drawings and Examples the utility model is done further detailed, complete explanation:
Embodiment
As shown in Figure 1: on-line automatic titrator of the present utility model, comprise sample injection unit, the titration unit, measuring unit and control module, described sample injection unit is successively by solenoid valve for sampling 1, peristaltic pump 2, Measuring glass 3 is formed, described Measuring glass 3 is made up of two cups up and down, and the bottom that is provided with overflow vent 8-1 and lower cup body at the sidepiece of last cup is provided with underflow head piece 8-2, sample injection unit is connected with measuring cup 4 by the underflow head piece 8-2 that is located at Measuring glass lower cup body bottom, is provided with application of sample solenoid valve 9 on the underflow head piece 8-2 bottom the described Measuring glass lower cup body and sample introduction pipe that 4 of measuring cups are connected; Described titration unit is made up of linear stepping motor 5 and piston pump titration apparatus 6, and the piston rod of piston pump titration apparatus 6 is connected with the output shaft of linear stepping motor 5, and piston pump titration apparatus 6 is connected with measuring cup 4 by buret 7; Sample injection unit, titration unit and measuring unit all are connected with control module 10.
Described linear stepping motor 5 adopts screw drive, and roller-compaction of screw rod, and screw rod is provided with the crack nut that oppositely disappears.
The piston tube of described piston pump titration apparatus 6 is the right cylinder hollow glass tube, and the glass tube internal diameter immobilizes.
The sample introduction step of on-line automatic titrator of the present utility model is as follows: closed application of sample solenoid valve 9, opened solenoid valve for sampling 1 and peristaltic pump 2 by control module, sample at first is added in the last cup of Measuring glass 3, after sample is filled it up with Measuring glass, stop sample introduction, wait for certain hour, the last overflow vent 8-1 that makes excess sample pass through Measuring glass discharges, and then the underflow head piece 8-2 of the sample in the Measuring glass bottom its lower cup body is put into measuring cup 4.
The titration step of on-line automatic titrator of the present utility model is as follows: because the piston motion of piston pump titration apparatus 6 is by linear stepping motor 5 controls, by the single-chip microcomputer step-by-step counting, can measure the distance of piston operation exactly, the distance of in piston tube, moving by recording and analyses, thus can accurately calculate the volume of dropping.
Claims (6)
1. on-line automatic titrator, comprise sample injection unit, titration unit, measuring unit and control module, and sample injection unit, titration unit and measuring unit all are connected with control module, it is characterized in that: described sample injection unit is made up of solenoid valve for sampling, peristaltic pump, Measuring glass successively, and sample injection unit is connected with measuring cup by the overflow vent that is located at the Measuring glass bottom; Described titration unit is made up of linear stepping motor and piston pump titration apparatus, and the piston rod of piston pump titration apparatus is connected with the output shaft of linear stepping motor, and the piston pump titration apparatus is connected with measuring cup by buret.
2. on-line automatic titrator according to claim 1 is characterized in that: described Measuring glass is made up of two cups up and down, and is provided with the underflow head piece in the bottom that the sidepiece of last cup is provided with overflow vent and lower cup body.
3. on-line automatic titrator according to claim 1 is characterized in that: the sample introduction pipe that is connected between the overflow vent of described Measuring glass bottom and measuring cup is provided with the application of sample solenoid valve.
4. on-line automatic titrator according to claim 1 is characterized in that: described linear stepping motor adopts screw drive, and roller-compaction of screw rod.
5. on-line automatic titrator according to claim 4 is characterized in that: described screw rod is provided with the crack nut that oppositely disappears.
6. on-line automatic titrator according to claim 1 is characterized in that: the piston tube of described piston pump titration apparatus is the right cylinder hollow glass tube, and the internal diameter of glass tube immobilizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201547129U CN201307107Y (en) | 2008-10-31 | 2008-10-31 | On-line automatic titrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201547129U CN201307107Y (en) | 2008-10-31 | 2008-10-31 | On-line automatic titrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201307107Y true CN201307107Y (en) | 2009-09-09 |
Family
ID=41099574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201547129U Expired - Fee Related CN201307107Y (en) | 2008-10-31 | 2008-10-31 | On-line automatic titrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201307107Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507856A (en) * | 2011-10-28 | 2012-06-20 | 方原民 | Peristaltic pump type weighing titrator and titration method thereof |
| CN102565277A (en) * | 2011-12-23 | 2012-07-11 | 上海仪电科学仪器股份有限公司 | Device special for measuring solution chemical oxygen demand (COD) value and use method thereof |
| CN105116098A (en) * | 2015-09-10 | 2015-12-02 | 中国家用电器研究院 | Automatic titration method and application |
| CN105403660A (en) * | 2015-12-16 | 2016-03-16 | 济南海能仪器股份有限公司 | Titration reaction apparatus |
| CN106706945A (en) * | 2016-12-30 | 2017-05-24 | 无锡博慧斯生物医药科技有限公司 | Automatic reagent dropping device and portable tester applying same |
| CN109167019A (en) * | 2018-09-03 | 2019-01-08 | 大同新成新材料股份有限公司 | A kind of cell negative electrode material and preparation method thereof and preparation facilities |
-
2008
- 2008-10-31 CN CNU2008201547129U patent/CN201307107Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507856A (en) * | 2011-10-28 | 2012-06-20 | 方原民 | Peristaltic pump type weighing titrator and titration method thereof |
| CN102565277A (en) * | 2011-12-23 | 2012-07-11 | 上海仪电科学仪器股份有限公司 | Device special for measuring solution chemical oxygen demand (COD) value and use method thereof |
| CN105116098A (en) * | 2015-09-10 | 2015-12-02 | 中国家用电器研究院 | Automatic titration method and application |
| CN105403660A (en) * | 2015-12-16 | 2016-03-16 | 济南海能仪器股份有限公司 | Titration reaction apparatus |
| CN106706945A (en) * | 2016-12-30 | 2017-05-24 | 无锡博慧斯生物医药科技有限公司 | Automatic reagent dropping device and portable tester applying same |
| CN109167019A (en) * | 2018-09-03 | 2019-01-08 | 大同新成新材料股份有限公司 | A kind of cell negative electrode material and preparation method thereof and preparation facilities |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI INESA SCIENTIFIC INSTRUMENT CO., LTD. Free format text: FORMER OWNER: SHANGHAI CO., LTD OF FINE SCIENTIFIC INSTRUMENTS Effective date: 20120503 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 200233 XUHUI, SHANGHAI TO: 201805 JIADING, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120503 Address after: 201805 Shanghai City, Anting, Miquan Road, No. 111, room 2, building 101, room Patentee after: INESA Scientific Instrument Co., Ltd. Address before: 200233 No. 7, Cangwu Road, Shanghai, Xuhui District Patentee before: Shanghai Co., Ltd of Fine Scientific Instruments |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20171031 |