CN105004874A - Autoinjection and dosage measuring method - Google Patents
Autoinjection and dosage measuring method Download PDFInfo
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- CN105004874A CN105004874A CN201510386707.5A CN201510386707A CN105004874A CN 105004874 A CN105004874 A CN 105004874A CN 201510386707 A CN201510386707 A CN 201510386707A CN 105004874 A CN105004874 A CN 105004874A
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- peristaltic pump
- gauge line
- liquid
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 80
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 61
- 238000005070 sampling Methods 0.000 claims abstract description 27
- 238000004544 sputter deposition Methods 0.000 claims abstract description 8
- 238000010079 rubber tapping Methods 0.000 claims description 27
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 230000000694 effects Effects 0.000 claims description 13
- 239000010808 liquid waste Substances 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 4
- 230000000994 depressogenic effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract 1
- 230000009467 reduction Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides an autoinjection and dosage measuring method. According to the autoinjection and dosage measuring method, cooperation of a peristaltic pump, a liquid level sensor, a multiported valve subassembly is realized, so that upward and downward repeated moving of samples in a pipeline composed of a measuring pipe, the multiported valve subassembly, a drain valve, and a waste liquid collector around the indicating liquid level of a liquid level sensor is realized, dosage measuring error caused by liquid inertia and liquid level sensing lag is reduced effectively; and in addition, sputtering caused by pressure difference the moment when a valve is opened is avoided via balancing the differential pressure of the two ends of the drain valve or the two ends of a sampling valve, autoinjection stability and dosage measuring accuracy are increased further, and especially autoinjection stability and dosage measuring accuracy of viscous liquid are improved greatly. It is shown by test results that single sampling error can be controlled in +-0.03ml, and sampling error of viscous liquid can be controlled in +-0.05ml via combination of the peristaltic pump, the liquid level sensor, and the multiported valve subassembly.
Description
Technical field
The present invention relates to a kind of auto injection and dosage measuring method, be specially adapted to auto injection and the dosage measuring of liquid of vicidity, water quality monitoring (or detection) technical field can be widely used in.
Background technology
" auto injection and dose metering devices " forms the requisite critical component of water quality on-line monitoring instrument, and its " stability of auto injection and accuracy of dosage measuring " is one of principal element affecting apparatus measures error.Mostly adopt the make of " peristaltic pump+liquid level sensor+multiport valve group " to realize auto injection and dosage measuring at present, common way is:
1, sample is directly evacuated to the instruction liquid level of liquid level sensor.
2, sample is directly entered sample chamber.
Traditional auto injection and dosage measuring method can not solve the dosage measuring error that the problem such as " fluid inertia ", " level sensing is delayed " and " pressure reduction at valve opening moment valve two ends " causes.When especially relating to auto injection and the dosage measuring of liquid of vicidity, long suction action can aggravate valve two ends pressure reduction, causes valve opening moment that serious expulsion events occurs in gauge line, thus causes larger dosage measuring error.
The present invention is by peristaltic pump, cooperation between multiport valve group and liquid level sensor, allow sample in " gauge line-multiport valve group-tapping valve-liquid waste collector " pipeline, repeatedly move up and down around liquid level sensor instruction liquid level, effectively reduce the dosage measuring error that " fluid inertia " and " level sensing is delayed " causes; By peristaltic pump, multiport valve group, cooperation between tapping valve and sampling valve, the pressure reduction at balancing liquid-discharge valve or sampling valve valve two ends, well solve the sputtering problem that valve opening moment pressure reduction causes, thus improve the stability of auto injection and the accuracy of dosage measuring, especially greatly improve the sample introduction stability of liquid of vicidity.
Test result shows, the present invention can by the single sample introduction control errors of " peristaltic pump+liquid level sensor+multiport valve group " mode at ± 0.03mL, and liquid of vicidity controls at ± 0.05mL.
Summary of the invention
The analytical and testing instrument that the object of the invention is for relating to " auto injection and dosage measuring " provides a kind of technical thought and scheme of novelty, for the accuracy of the stability and dosage measuring that improve auto injection.
Technical scheme of the present invention:
A kind of auto injection and dosage measuring method, include but not limited to following steps:
S100. multiport valve group 1 opens corresponding sample intake passage valve, and now other all channel valves are all closed;
S201. start peristaltic pump 2 reversion and will treat that the suction of sample introduction object is to gauge line 3;
S202. after the liquid level being pumped into gauge line 3 arrives appointment liquid level indicated by liquid level sensor 4, peristaltic pump 2 stops after continuing reversion one fixed time, to ensure that liquid level is now higher than the appointment liquid level indicated by liquid level sensor;
S203., after peristaltic pump 2 stops, multiport valve group 1 closes corresponding sample intake passage valve;
S301. start peristaltic pump 2 and rotate forward a fixed time, toward the upper end press-in air of gauge line 3, to be equilibrated at the negative pressure extracting and formed in sample introduction Object Process, after ensureing to open tapping valve 5, the sample introduction object in gauge line 3 can not toward the sputtering of tube wall surrounding;
S302., after peristaltic pump 2 stops, opening tapping valve 5, now other all channel valves are all closed;
S303. start peristaltic pump 2 to rotate forward, the liquid level in pipe 3 to be batched is depressed into and stops peristaltic pump 2 a little less than after the appointment liquid level indicated by liquid level sensor 4;
S304. start peristaltic pump 2 to reverse, the liquid level in pipe 3 to be batched stops peristaltic pump 2 after being promoted to the appointment liquid level indicated by liquid level sensor 4, closes tapping valve 5;
S401. start peristaltic pump 2 and rotate forward a fixed time, toward the upper end press-in air of gauge line 3, with the draught head between the upper end of equilbristat buret 2 and sample chamber, after ensureing to open sampling valve 6, the sample introduction object in gauge line 3 can not toward the sputtering of tube wall surrounding;
S402., after peristaltic pump 2 stops, opening sampling valve 6, now other all channel valves are all closed;
S403. start peristaltic pump 2 to rotate forward, the sample introduction object in gauge line 3 is entered to sample chamber;
S404. stop peristaltic pump 2 after entering, close sampling valve 6;
S500. open tapping valve 5, start peristaltic pump 2 and rotate forward, the Liquid Residue in multiport valve group 1 is drained into liquid waste collector, for sample introduction is prepared next time.
The device that said method relates to is formed primarily of multiport valve group 1, peristaltic pump 2, gauge line 3, liquid level sensor 4, tapping valve 5, sampling valve 6: sample introduction object is selected in the effect of multiport valve group 1; The effect of peristaltic pump 2 is for pipe passage provides malleation or negative pressure, ensures that peristaltic pump 2 flexible pipe completes suction and arranges action with counter under the condition not contacting sample introduction liquid; The effect of gauge line 3 is for dosage measuring provides level sensing and sample introduction liquid buffer memory place; The effect of liquid level sensor 4 is for level sensing provides indicator signal; Tapping valve 5 is valve switchs that pilot piping leads to liquid waste collector; Sampling valve 6 is valve switchs of pilot piping turnover sample chamber.
Multiport valve group 1 is connected with the lower end of gauge line 3, tapping valve 5, sampling valve 6 respectively by adaptor; Connected by the upper end of adaptor and gauge line 3 for one of peristaltic pump 2 flexible pipe, other end access air; Liquid level sensor 4 is arranged on the tube wall of gauge line 3; Tapping valve 5 is switched to liquid waste collector by adaptor; Sampling valve 6 is switched to sample chamber by adaptor.
Further, logical valve group 1 can adopt cascade valve or many way rotary valves.
Further, gauge line 3 can be arranged multiple liquid level sensor 4 to realize the metering of various dose.
Effect of the present invention:
Greatly improve the stability of auto injection and the accuracy of dosage measuring, can by the single sample introduction control errors of " peristaltic pump+liquid level sensor " mode at ± 0.03mL, liquid of vicidity controls at ± 0.05mL.
Accompanying drawing explanation
Fig. 1 is auto injection and dose metering devices basic comprising schematic diagram;
Fig. 2 arranges schematic diagram for adopting two position sensing.
Drawing reference numeral illustrates:
1-multiport valve group; 2-peristaltic pump; 3-gauge line; 4-liquid level sensor; 5-tapping valve; 6-sampling valve.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Below in conjunction with concrete diagram, set forth the present invention further.
embodiment one
A kind of auto injection and dosage measuring method, include but not limited to following steps:
S100. multiport valve group 1 opens corresponding sample intake passage valve, and now other all channel valves are all closed;
S201. start peristaltic pump 2 reversion and will treat that the suction of sample introduction object is to gauge line 3;
S202. after the liquid level being pumped into gauge line 3 arrives appointment liquid level indicated by liquid level sensor 4, peristaltic pump 2 stops after continuing reversion one fixed time, to ensure that liquid level is now higher than the appointment liquid level indicated by liquid level sensor;
S203., after peristaltic pump 2 stops, multiport valve group 1 closes corresponding sample intake passage valve;
S301. start peristaltic pump 2 and rotate forward a fixed time, toward the upper end press-in air of gauge line 3, to be equilibrated at the negative pressure extracting and formed in sample introduction Object Process, after ensureing to open tapping valve 5, the sample introduction object in gauge line 3 can not toward the sputtering of tube wall surrounding;
S302., after peristaltic pump 2 stops, opening tapping valve 5, now other all channel valves are all closed;
S303. start peristaltic pump 2 to rotate forward, the liquid level in pipe 3 to be batched is depressed into and stops peristaltic pump 2 a little less than after the appointment liquid level indicated by liquid level sensor 4;
S304. start peristaltic pump 2 to reverse, the liquid level in pipe 3 to be batched stops peristaltic pump 2 after being promoted to the appointment liquid level indicated by liquid level sensor 4, closes tapping valve 5;
S401. start peristaltic pump 2 and rotate forward a fixed time, toward the upper end press-in air of gauge line 3, with the draught head between the upper end of equilbristat buret 2 and sample chamber, after ensureing to open sampling valve 6, the sample introduction object in gauge line 3 can not toward the sputtering of tube wall surrounding;
S402., after peristaltic pump 2 stops, opening sampling valve 6, now other all channel valves are all closed;
S403. start peristaltic pump 2 to rotate forward, the sample introduction object in gauge line 3 is entered to sample chamber;
S404. stop peristaltic pump 2 after entering, close sampling valve 6;
S500. open tapping valve 5, start peristaltic pump 2 and rotate forward, the Liquid Residue in multiport valve group 1 is drained into liquid waste collector, for sample introduction is prepared next time.
The device that said method relates to is formed primarily of multiport valve group 1, peristaltic pump 2, gauge line 3, liquid level sensor 4, tapping valve 5, sampling valve 6, as shown in Figure 1:
Sample introduction object is selected in the effect of multiport valve group 1; The effect of peristaltic pump 2 is for pipe passage provides malleation or negative pressure, ensures that peristaltic pump 2 flexible pipe completes suction and arranges action with counter under the condition not contacting sample introduction liquid; The effect of gauge line 3 is for dosage measuring provides level sensing and sample introduction liquid buffer memory place; The effect of liquid level sensor 4 is for level sensing provides indicator signal; Tapping valve 5 is valve switchs that pilot piping leads to liquid waste collector; Sampling valve 6 is valve switchs of pilot piping turnover sample chamber.
Multiport valve group 1 is connected with the lower end of gauge line 3, tapping valve 5, sampling valve 6 respectively by adaptor; Connected by the upper end of adaptor and gauge line 3 for one of peristaltic pump 2 flexible pipe, other end access air; Liquid level sensor 4 is arranged on the tube wall of gauge line 3; Tapping valve 5 is switched to liquid waste collector by adaptor; Sampling valve 6 is switched to sample chamber by adaptor.
embodiment two
The present embodiment is substantially identical with embodiment one, and difference is: can arrange multiple liquid level sensor 4 on gauge line 3, to realize multiple dosage measuring, as shown in Figure 2.
More than show and describe ultimate principle of the present invention, the technician of the industry should understand, and the present invention is not restricted to the described embodiments.The just ultimate principle of the present invention described in above-described embodiment and instructions, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these changes and improvements all fall in the scope of protection of present invention.
Claims (4)
1. auto injection and a dosage measuring method, is characterized in that: described method includes but not limited to following steps,
S100. multiport valve group (1) opens corresponding sample intake passage valve, and now other all channel valves are all closed;
S201. start peristaltic pump (2) reversion and will treat that the suction of sample introduction object is to gauge line (3);
S202. after the liquid level being pumped into gauge line (3) arrives the appointment liquid level indicated by liquid level sensor (4), peristaltic pump (2) continues to stop after reversion one fixed time, to ensure that liquid level is now higher than the appointment liquid level indicated by liquid level sensor;
S203., after peristaltic pump (2) stops, multiport valve group (1) closes corresponding sample intake passage valve;
S301. start peristaltic pump (2) and rotate forward a fixed time, toward the upper end press-in air of gauge line (3), to be equilibrated at the negative pressure extracting and formed in sample introduction Object Process, after tapping valve (5) is opened in guarantee, the sample introduction object in gauge line (3) can not toward the sputtering of tube wall surrounding;
S302., after peristaltic pump (2) stops, opening tapping valve (5), now other all channel valves are all closed;
S303. start peristaltic pump (2) to rotate forward, the liquid level in pipe to be batched (3) is depressed into and stops peristaltic pump (2) a little less than after the appointment liquid level indicated by liquid level sensor (4);
S304. start peristaltic pump (2) reversion, the liquid level in pipe to be batched (3) stops peristaltic pump (2) after being promoted to the appointment liquid level indicated by liquid level sensor (4), closes tapping valve (5);
S401. start peristaltic pump (2) and rotate forward a fixed time, toward the upper end press-in air of gauge line (3), with the draught head between the upper end of equilbristat buret (2) and sample chamber, after sampling valve (6) is opened in guarantee, the sample introduction object in gauge line (3) can not toward the sputtering of tube wall surrounding;
S402., after peristaltic pump (2) stops, opening sampling valve (6), now other all channel valves are all closed;
S403. start peristaltic pump (2) to rotate forward, the sample introduction object in gauge line (3) is entered to sample chamber;
S404. stop peristaltic pump (2) after entering, close sampling valve (6);
S500. open tapping valve (5), start peristaltic pump (2) and rotate forward, the Liquid Residue in multiport valve group (1) is drained into liquid waste collector, for sample introduction is prepared next time.
2. method according to claim 1, it is characterized in that: the device that described method relates to is formed primarily of multiport valve group (1), peristaltic pump (2), gauge line (3), liquid level sensor (4), tapping valve (5), sampling valve (6)
Sample introduction object is selected in the effect of multiport valve group (1);
The effect of peristaltic pump (2) is for pipe passage provides malleation or negative pressure, ensures that peristaltic pump (2) flexible pipe completes suction and arranges action with counter under the condition not contacting sample introduction liquid;
The effect of gauge line (3) is for dosage measuring provides level sensing and sample introduction liquid buffer memory place; The effect of liquid level sensor (4) is for level sensing provides indicator signal;
Tapping valve (5) is the valve switch that pilot piping leads to liquid waste collector;
Sampling valve (6) is the valve switch of pilot piping turnover sample chamber;
Multiport valve group (1) is connected with the lower end of gauge line (3), tapping valve (5), sampling valve (6) respectively by adaptor; Connected by the upper end of adaptor and gauge line (3) for one of peristaltic pump (2) flexible pipe, other end access air; Liquid level sensor (4) is arranged on the tube wall of gauge line (3); Tapping valve (5) is switched to liquid waste collector by adaptor; Sampling valve (6) is switched to sample chamber by adaptor.
3. device according to claim 2, is characterized in that: described multiport valve group (1) can adopt cascade valve or many way rotary valves.
4. device according to claim 2, is characterized in that: described gauge line (3) can be arranged multiple liquid level sensor (4) to realize the metering of various dose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510386707.5A CN105004874B (en) | 2015-07-03 | 2015-07-03 | A kind of auto injection and dosage measuring method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510386707.5A CN105004874B (en) | 2015-07-03 | 2015-07-03 | A kind of auto injection and dosage measuring method |
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| CN105004874A true CN105004874A (en) | 2015-10-28 |
| CN105004874B CN105004874B (en) | 2017-03-08 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105698893A (en) * | 2016-04-29 | 2016-06-22 | 力合科技（湖南）股份有限公司 | Liquid volume metering device |
| CN108020447A (en) * | 2018-02-01 | 2018-05-11 | 安徽理工大学 | A kind of gas-chromatography flow is constant to adopt sampling system device |
| CN108169505A (en) * | 2016-12-01 | 2018-06-15 | 恩德莱斯和豪瑟尔分析仪表两合公司 | For determining the method for the concentration of the measurand of fluid sample and analyzer |
| CN112083119A (en) * | 2020-06-03 | 2020-12-15 | 杭州绿洁环境科技股份有限公司 | Permanganate index analyzer |
| WO2022127928A1 (en) * | 2020-12-19 | 2022-06-23 | 北京大学 | Automatic sample feeding system |
| CN114870737A (en) * | 2022-05-18 | 2022-08-09 | 深圳市中成环境科技有限公司 | Method for extracting medicament by metering any volume |
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| CN203965454U (en) * | 2014-07-02 | 2014-11-26 | 中国矿业大学(北京) | A kind of high viscosity liquid sample introduction experimental provision |
| US20150168373A1 (en) * | 2013-12-16 | 2015-06-18 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Analytical device for determining a digestion parameter of a liquid sample |
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| CN201628636U (en) * | 2009-09-02 | 2010-11-10 | 广州市怡文环境科技股份有限公司 | Accurate liquid extracting and metering device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698893A (en) * | 2016-04-29 | 2016-06-22 | 力合科技（湖南）股份有限公司 | Liquid volume metering device |
| CN108169505A (en) * | 2016-12-01 | 2018-06-15 | 恩德莱斯和豪瑟尔分析仪表两合公司 | For determining the method for the concentration of the measurand of fluid sample and analyzer |
| CN108169505B (en) * | 2016-12-01 | 2021-06-25 | 恩德莱斯和豪瑟尔分析仪表两合公司 | Method and analyzer for determining the concentration of a measured object of a liquid sample |
| CN108020447A (en) * | 2018-02-01 | 2018-05-11 | 安徽理工大学 | A kind of gas-chromatography flow is constant to adopt sampling system device |
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| CN112083119A (en) * | 2020-06-03 | 2020-12-15 | 杭州绿洁环境科技股份有限公司 | Permanganate index analyzer |
| WO2022127928A1 (en) * | 2020-12-19 | 2022-06-23 | 北京大学 | Automatic sample feeding system |
| CN114870737A (en) * | 2022-05-18 | 2022-08-09 | 深圳市中成环境科技有限公司 | Method for extracting medicament by metering any volume |
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| CN105004874B (en) | 2017-03-08 |
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Address after: 518083, 7th Floor, Building 8, Jinhuanyu Industrial Park, Changfeng Road, Fenghuang Community, Fenghuang Street, Guangming District, Shenzhen City, Guangdong Province Patentee after: Guangdong Shiyilin Technology Co.,Ltd. Country or region after: China Address before: 8 / F, zhongkonuo Digital Technology Industrial Park, No.7 Road, east of Guangming hi tech park, Gongming office, Guangming New District, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN SVOLN TECHNOLOGY Co.,Ltd. Country or region before: China |