CN106645609A - Metering device for online hexavalent-chromium water quality monitor and using method of metering device - Google Patents
Metering device for online hexavalent-chromium water quality monitor and using method of metering device Download PDFInfo
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- CN106645609A CN106645609A CN201610845845.XA CN201610845845A CN106645609A CN 106645609 A CN106645609 A CN 106645609A CN 201610845845 A CN201610845845 A CN 201610845845A CN 106645609 A CN106645609 A CN 106645609A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 30
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 48
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 238000005070 sampling Methods 0.000 claims abstract description 28
- 239000003153 chemical reaction reagent Substances 0.000 claims description 64
- 239000012530 fluid Substances 0.000 claims description 48
- 238000006243 chemical reaction Methods 0.000 claims description 24
- 239000002699 waste material Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 6
- 230000032683 aging Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 241001584775 Tunga penetrans Species 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
- G01F23/292—Light, e.g. infrared or ultraviolet
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- Engineering & Computer Science (AREA)
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- Sampling And Sample Adjustment (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The invention provides a metering device for an online hexavalent-chromium water quality monitor. The metering device comprises a metering feedback structure, a quantifying structure, a power structure and a mounting faceplate. The power structure comprises a peristaltic pump and a nine-way valve, and the peristaltic pump and the nine-way valve are respectively driven by a first driving motor and a second driving motor which are mounted on the mounting faceplate. The quantifying structure comprises a first quantifying ring, a second quantifying ring and third quantifying ring, and the first quantifying ring and the second quantifying ring are smaller than the third quantifying ring in size. The metering feedback structure comprises a first liquid flow sensor and a second liquid flow sensor. The metering device for the online hexavalent-chromium water quality monitor has the advantages of high water sampling precision, high water sampling efficiency, high stability, simple structure and low cost. The invention further provides a using method of the metering device.
Description
Technical field
The present invention relates to a kind of metering device and its using method, in particular it relates to a kind of hexavalent chromium water quality on-line monitoring
Instrument metering device and its using method.
Background technology
Traditional Water Quality on-line Automatic Monitor metering system, measuring accuracy is low, metered volume poor repeatability, by electronics unit
Device aging and the impact in life-span, measure unstable.The measuring accuracy and stability for improving metering device is to improve instrument entirety
The key of performance.Meanwhile, Water Quality on-line Automatic Monitor device internal part is more, occurs that random faule situation is more, and failure is not
Easy investigation, thus design the device of real-time feedback system working condition be improve operating efficiency, save human cost have efficacious prescriptions
Method.
The metering device of hexavalent chromium water quality on-line computing model is primarily present following shortcoming in existing market：
1. measuring accuracy is low, poor repeatability
At present, affected by photoelectric device sensitivity using forms such as photoelectric metering method, jiggers more than conventional metering device,
Metered volume is unstable, poor repeatability, and fault rate is high.Meanwhile, using the metering device of photoelectric metering principle, using photoelectric device
Installation site positioning liquid level position, so as to metering sample feeding volume, this kind of method is high to installation requirement, and resetting difficulty is big.Light
Electrical part service life and aging impact, the stability in use of device is poor.
2. cannot accurately judge measuring state, be difficult to investigate metering unit failure
In the metering device of existing Cr VI on-line computing model, it is impossible to realize that closed signal is fed back, break down in measuring system
When, it is impossible to the investigation of sample introduction and cleaning link failure is carried out, and then the running status of all parts cannot be judged.Attendant needs
Long-time debugging and malfunction elimination are carried out to instrument, workload is big, time-consuming, inefficiency.
The content of the invention
The present invention is in order to solve drawbacks described above present in prior art and deficiency, there is provided a kind of hexavalent chromium water quality is online
Monitor metering device and its using method, the device takes liquid high precision and efficiency high, good stability, and simple structure,
Low cost.
To solve above-mentioned technical problem, the present invention provides a kind of hexavalent chromium water quality on-line computing model metering device, including
Metrology feedback structure, D-M (Determiner-Measure) construction, dynamic structure and installation panel, the dynamic structure includes peristaltic pump and nine port valves, described
Peristaltic pump and nine port valve are driven respectively by the motor one and motor two on the installation panel；It is described
D-M (Determiner-Measure) construction includes that the volume of quantitative loop one, quantitative loop two and quantitative loop three, the quantitative loop one and the quantitative loop two is little
In the volume of the quantitative loop three；The metrology feedback structure includes fluid sensor one and fluid sensor two；
Nine valve ports of nine port valve are respectively 1 common port and 8 samples access valve port；Wherein, common port and quantitative loop
Three entrance is connected, and the outlet of the quantitative loop three is connected by peristaltic pump tube with the peristaltic pump, and in the quantitative loop three
Porch and exit be provided with fluid sensor one and fluid sensor two, between the quantitative loop three and the peristaltic pump tube
It is provided with magnetic valve three；8 sample access valve ports are respectively cleaning device access port, water sample access port to be measured, reaction tube and connect
Entrance, waste liquid pool access port, the access port of reagent two, the access port of reagent one, the access port of titer two and the access port of titer one；Institute
The one end for stating quantitative loop one and the quantitative loop two is connected respectively with the access port of the reagent one and the access port of reagent two, the other end
It is connected with the holding bottle of reagent one by pipeline one respectively, pipeline two is connected with the holding bottle of reagent two, and in the He of the quantitative loop one
It is provided between the pipeline one between magnetic valve one, the quantitative loop two and the pipeline two and is provided with magnetic valve two.
Further, the quantitative loop one, quantitative loop two and quantitative loop three are polyfluortetraethylene pipe.
Further, the fluid sensor one and fluid sensor two are photoelectric liquid level sensor.
Further, the magnetic valve one, magnetic valve two and magnetic valve three are two-bit triplet magnetic valve, including common port
COM, air connection end NC and normally opened end NO.
The present invention also provides a kind of using method of hexavalent chromium water quality on-line computing model metering device, including water sample to be measured
Sampling, reagent sampling, titer sampling and device cleaning；
Wherein, water sample sampling process to be measured is：Motor two drives nine port valve valve core rotations to water sample access port to be measured, by nine
Port valve common port is connected with water sample access port to be measured, and motor one drives peristaltic pump to rotate forward extraction water sample to be measured, treats liquid
Flow sensor two is detected after liquid level, and its indicator lamp goes out, while signal is fed back to into programmable logic controller (PLC)；FPGA
Controller is connected to after feedback signal, and order motor one quits work, and is quit work so as to control peristaltic pump；Then, control
The common port COM of magnetic valve three is connected with air end NC, and it is compacted that programmable logic controller (PLC) sends instruction control to motor one
Dynamic pump is rotated forward, and the water sample to be measured between magnetic valve three and fluid sensor two is entered, the indicator lamp of fluid sensor two
Bright expression is drained；Motor two drives nine port valve valve core rotations to reaction tube access port, by nine port valve common ports and reaction tube
Access port is connected, and the common port COM for controlling magnetic valve three is connected with normally opened end NO, and motor one drives peristaltic pump reversely to turn
It is dynamic, the water sample to be measured in quantitative loop three is pushed in reaction tube, after fluid sensor one can't detect liquid level, its indicator lamp
Bright, while signal is fed back to programmable logic controller by fluid sensor one, programmable logic controller (PLC) receives feedback letter
After number 10s, send to motor one and instruct, control peristaltic pump quits work；
Reagent sampling includes that the sampling of reagent one and reagent two are sampled；
The sampling process of reagent one is：Motor two drives nine port valve valve core rotations to the access port of reagent one, and nine port valves are public
Mouth is connected with the access port of reagent one, and motor one drives peristaltic pump to rotate forward extraction reagent one, and fluid sensor one is detected
To after liquid level, its indicator lamp goes out, while signal is fed back to into programmable logic controller (PLC), programmable logic controller (PLC) is received instead
After feedback signal, send to motor one and instruct, control peristaltic pump quits work, at the same by the common port COM of magnetic valve one and
Air end NC is connected；Motor two drives nine port valve valve core rotations to waste liquid pool access port, by nine port valve common ports and waste liquid
Pond access port is connected, and motor one drives peristaltic pump to rotate backward the examination between the port valve common port of fluid sensor one and nine
Agent one is discharged；Control peristaltic pump quits work, while by nine port valve valve core rotations to the access port of reagent one, by nine port valve common ports
Connect with the access port of reagent one, control peristaltic pump is rotated forward, and a kind of reagent one of quantitative loop is sucked into quantitative loop three, candidate agent
One fully enters after quantitative loop three, and fluid sensor one can't detect liquid level, and its indicator lamp is bright, while signal is fed back to can compile
Journey logic controller, programmable logic controller (PLC) sends to motor one and instructs, and control peristaltic pump quits work；Motor
Two drive nine port valve valve core rotations to reaction tube access port, and nine port valve common ports are connected with reaction tube access port, and control is wriggled
Pump is rotated backward, and the reagent one that will be stored in quantitative loop is pushed in reaction tube；
The sampling process of reagent two is identical with the employing process of reagent one, and difference is magnetic valve two, quantitative loop two and examination
The access port participation work of agent two.
Further, the quantitative loop one, quantitative loop two and quantitative loop three are polyfluortetraethylene pipe.
Further, the fluid sensor one and fluid sensor two are photoelectric liquid level sensor.
Further, the magnetic valve one, magnetic valve two and magnetic valve three are two-bit triplet magnetic valve, including common port
COM, air connection end NC and normally opened end NO.
The Advantageous Effects that the present invention is reached：The hexavalent chromium water quality on-line computing model that the present invention is provided metering dress
Put, the device is provided with metrology feedback structure, and liquid level signal is detected by fluid sensor, Real-time Feedback measuring state,
And the working condition of detecting system can quickly be judged by the indicator lamp on fluid sensor；Can be right by D-M (Determiner-Measure) construction
Sample carries out accurate quantification, high precision；In addition, the sampling efficiency of the present invention is high, metering repeatability is high, and simple structure can be manufactured
Property it is strong, overcome the precision for carrying out liquid meter by electronic devices and components it is low, it is affected by environment larger the shortcomings of.
Description of the drawings
The hexavalent chromium water quality on-line computing model of Fig. 1 present invention metering apparatus structure schematic diagram；
The hexavalent chromium water quality on-line computing model of Fig. 2 present invention metering apparatus structure schematic diagram.
Wherein：1 peristaltic pump；2 peristaltic pump tubes；3 fluid sensors two；4 magnetic valves three；5 quantitative loops three；6 fluid sensors
One；7 nine port valves；8 quantitative loops one；9 quantitative loops two；10 magnetic valves one；11 magnetic valves two；12 reaction tubes；13 install panel；14 is public
Common mouth；15 cleaning device access ports；16 water sample access ports to be measured；17 reaction tube access ports；18 waste liquid pool access ports；19 reagents two
Access port；The access port of 20 reagent one；The access port of 21 titer two；The access port of 22 titer one.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
As shown in Figure 1-2, the present invention provides a kind of hexavalent chromium water quality on-line computing model metering device, including metrology feedback
Structure, D-M (Determiner-Measure) construction, dynamic structure and installation panel 13, the dynamic structure includes the port valve 7 of peristaltic pump 1 and nine, the wriggling
Pump 1 and nine port valve 7 are driven respectively by the motor one and motor two on the installation panel 13；It is described
D-M (Determiner-Measure) construction includes the volume of quantitative loop 1, quantitative loop 29 and quantitative loop 35, the quantitative loop 1 and the quantitative loop 29
5 volumes of respectively less than described quantitative loop three；The metrology feedback structure includes fluid sensor 1 and fluid sensor 26；
Nine valve ports of nine port valve 7 are respectively 1 common port 14 and 8 samples access valve port；Wherein, common port 14 with it is fixed
The entrance of amount ring 35 is connected, and the outlet of the quantitative loop 35 is connected by peristaltic pump tube 2 with the peristaltic pump 1, and described
The porch and exit of quantitative loop 35 is provided with fluid sensor 1 and fluid sensor 26, the quantitative loop 35 and described
Magnetic valve 34 is provided between peristaltic pump tube 2；8 samples access valve port and are respectively cleaning device access port 15, water sample to be measured
Access port 16, reaction tube access port 17, waste liquid pool access port 18, the access port 19 of reagent two, the access port 20 of reagent one, titer two
Access port 21 and the access port 22 of titer one；One end of the quantitative loop 1 and the quantitative loop 29 respectively with the reagent one
Access port 20 is connected with the access port 19 of reagent two, the other end is connected respectively by pipeline one with the holding bottle of reagent one, pipeline two with
The holding bottle of reagent two is connected, and the magnetic valve one 10, quantitative loop two is provided between the quantitative loop 1 and the pipeline one
Magnetic valve 2 11 is provided between 9 and the pipeline two.
The quantitative loop 1, quantitative loop 29 and quantitative loop 35 are polyfluortetraethylene pipe.
The fluid sensor 1 and fluid sensor 26 are photoelectric liquid level sensor.
The magnetic valve 1, magnetic valve 2 11 and magnetic valve 34 are two-bit triplet magnetic valve, including common port COM,
Air connection end NC and normally opened end NO.
Embodiment
Used as one embodiment of the present of invention, 9 valves of nine port valves 7, i.e., valve port one is to valve port nine, respectively common port
14th, cleaning device access port 15, water sample access port 16 to be measured, reaction tube access port 17, waste liquid pool access port 18, reagent two are accessed
The mouth 19, access port 20 of reagent one, the access port 21 of titer two and the access port 22 of titer one.
Below the using method kind of hexavalent chromium water quality on-line computing model metering device is illustrated as object with embodiment
The using method of hexavalent chromium water quality on-line computing model metering device, including the sampling of water sample sampling to be measured, reagent, titer sampling
With device cleaning；
Wherein, water sample sampling process to be measured is：Motor two drives nine port valve valve core rotations to water sample access port to be measured, by nine
Port valve common port is connected with water sample access port to be measured, and motor one drives peristaltic pump to rotate forward extraction water sample to be measured, treats liquid
Flow sensor two is detected after liquid level, and its indicator lamp goes out, while signal is fed back to into programmable logic controller (PLC)；FPGA
Controller is connected to after feedback signal, and order motor one quits work, and is quit work so as to control peristaltic pump；Then, control
The common port COM of magnetic valve three is connected with air end NC, and it is compacted that programmable logic controller (PLC) sends instruction control to motor one
Dynamic pump is rotated forward, and the water sample to be measured between magnetic valve three and fluid sensor two is entered, the indicator lamp of fluid sensor two
Bright expression is drained；Motor two drives nine port valve valve core rotations to reaction tube access port, by nine port valve common ports and reaction tube
Access port is connected, and the common port COM for controlling magnetic valve three is connected with normally opened end NO, and motor one drives peristaltic pump reversely to turn
It is dynamic, the water sample to be measured in quantitative loop three is pushed in reaction tube, after fluid sensor one can't detect liquid level, its indicator lamp
Bright, while signal is fed back to programmable logic controller by fluid sensor one, programmable logic controller (PLC) receives feedback letter
After number 10s, send to motor one and instruct, control peristaltic pump quits work；
Reagent sampling includes that the sampling of reagent one and reagent two are sampled；
The sampling process of reagent one is：Motor two drives nine port valve valve core rotations to the access port of reagent one, and nine port valves are public
Mouth is connected with the access port of reagent one, and motor one drives peristaltic pump to rotate forward extraction reagent one, and fluid sensor one is detected
To after liquid level, its indicator lamp goes out, while signal is fed back to into programmable logic controller (PLC), programmable logic controller (PLC) is received instead
After feedback signal, send to motor one and instruct, control peristaltic pump quits work, at the same by the common port COM of magnetic valve one and
Air end NC is connected；Motor two drives nine port valve valve core rotations to waste liquid pool access port, by nine port valve common ports and waste liquid
Pond access port is connected, and motor one drives peristaltic pump to rotate backward the examination between the port valve common port of fluid sensor one and nine
Agent one is discharged；Control peristaltic pump quits work, while by nine port valve valve core rotations to the access port of reagent one, by nine port valve common ports
Connect with the access port of reagent one, control peristaltic pump is rotated forward, and a kind of reagent one of quantitative loop is sucked into quantitative loop three, candidate agent
One fully enters after quantitative loop three, and fluid sensor one can't detect liquid level, and its indicator lamp is bright, while signal is fed back to can compile
Journey logic controller, programmable logic controller (PLC) sends to motor one and instructs, and control peristaltic pump quits work；Motor
Two drive nine port valve valve core rotations to reaction tube access port, and nine port valve common ports are connected with reaction tube access port, and control is wriggled
Pump is rotated backward, and the reagent one that will be stored in quantitative loop is pushed in reaction tube；
The sampling process of reagent two is identical with the employing process of reagent one, and difference is magnetic valve two, quantitative loop two and examination
The access port participation work of agent two.
The sampling process of titer one and titer two is identical with water sample sampling process to be measured, and difference is titer
One access port and the access port participation work of titer two.
Wherein, the quantitative loop one, quantitative loop two and quantitative loop three are polyfluortetraethylene pipe.
The fluid sensor one and fluid sensor two are photoelectric liquid level sensor.
The magnetic valve one, magnetic valve two and magnetic valve three are two-bit triplet magnetic valve, including common port COM, air
Connection end NC and normally opened end NO.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, on the premise of without departing from the technology of the present invention principle, some improvement and deformation can also be made, these improve and deform
Also should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of hexavalent chromium water quality on-line computing model metering device, it is characterised in that：Including metrology feedback structure, quantitative knot
Structure, dynamic structure and installation panel, the dynamic structure includes peristaltic pump and nine port valves, the peristaltic pump and nine port valve point
Do not driven by the motor one and motor two on the installation panel；The D-M (Determiner-Measure) construction includes quantitative loop
The volume of the first, quantitative loop two and quantitative loop three, the quantitative loop one and the quantitative loop two is respectively less than the body of the quantitative loop three
Product；The metrology feedback structure includes fluid sensor one and fluid sensor two；
Nine valve ports of nine port valve are respectively 1 common port and 8 samples access valve port；Wherein, common port and quantitative loop
Three entrance is connected, and the outlet of the quantitative loop three is connected by peristaltic pump tube with the peristaltic pump, and in the quantitative loop three
Porch and exit be provided with fluid sensor one and fluid sensor two, between the quantitative loop three and the peristaltic pump tube
It is provided with magnetic valve three；8 sample access valve ports are respectively cleaning device access port, water sample access port to be measured, reaction tube and connect
Entrance, waste liquid pool access port, the access port of reagent two, the access port of reagent one, the access port of titer two and the access port of titer one；Institute
The one end for stating quantitative loop one and the quantitative loop two is connected respectively with the access port of the reagent one and the access port of reagent two, the other end
It is connected with the holding bottle of reagent one by pipeline one respectively, pipeline two is connected with the holding bottle of reagent two, and in the He of the quantitative loop one
It is provided between the pipeline one between magnetic valve one, the quantitative loop two and the pipeline two and is provided with magnetic valve two.
2. hexavalent chromium water quality on-line computing model metering device according to claim 1, it is characterised in that：The quantitative loop
First, quantitative loop two and quantitative loop three are polyfluortetraethylene pipe.
3. hexavalent chromium water quality on-line computing model metering device according to claim 1, it is characterised in that：The liquid spreads
Sensor one and fluid sensor two are photoelectric liquid level sensor.
4. hexavalent chromium water quality on-line computing model metering device according to claim 1, it is characterised in that：The magnetic valve
First, magnetic valve two and magnetic valve three are two-bit triplet magnetic valve, including common port COM, air connection end NC and normally opened end NO.
5. a kind of using method of hexavalent chromium water quality on-line computing model metering device, it is characterised in that：Adopt including water sample to be measured
Sample, reagent sampling, titer sampling and device cleaning；
Wherein, water sample sampling process to be measured is：Motor two drives nine port valve valve core rotations to water sample access port to be measured, by nine
Port valve common port is connected with water sample access port to be measured, and motor one drives peristaltic pump to rotate forward extraction water sample to be measured, treats liquid
Flow sensor two is detected after liquid level, and its indicator lamp goes out, while signal is fed back to into programmable logic controller (PLC)；FPGA
Controller is connected to after feedback signal, and order motor one quits work, and is quit work so as to control peristaltic pump；Then, control
The common port COM of magnetic valve three is connected with air end NC, and it is compacted that programmable logic controller (PLC) sends instruction control to motor one
Dynamic pump is rotated forward, and the water sample to be measured between magnetic valve three and fluid sensor two is entered, the indicator lamp of fluid sensor two
Bright expression is drained；Motor two drives nine port valve valve core rotations to reaction tube access port, by nine port valve common ports and reaction tube
Access port is connected, and the common port COM for controlling magnetic valve three is connected with normally opened end NO, and motor one drives peristaltic pump reversely to turn
It is dynamic, the water sample to be measured in quantitative loop three is pushed in reaction tube, after fluid sensor one can't detect liquid level, its indicator lamp
Bright, while signal is fed back to programmable logic controller by fluid sensor one, programmable logic controller (PLC) receives feedback letter
After number 10s, send to motor one and instruct, control peristaltic pump quits work；
Reagent sampling includes that the sampling of reagent one and reagent two are sampled；
The sampling process of reagent one is：Motor two drives nine port valve valve core rotations to the access port of reagent one, and nine port valves are public
Mouth is connected with the access port of reagent one, and motor one drives peristaltic pump to rotate forward extraction reagent one, and fluid sensor one is detected
To after liquid level, its indicator lamp goes out, while signal is fed back to into programmable logic controller (PLC), programmable logic controller (PLC) is received instead
After feedback signal, send to motor one and instruct, control peristaltic pump quits work, at the same by the common port COM of magnetic valve one and
Air end NC is connected；Motor two drives nine port valve valve core rotations to waste liquid pool access port, by nine port valve common ports and waste liquid
Pond access port is connected, and motor one drives peristaltic pump to rotate backward the examination between the port valve common port of fluid sensor one and nine
Agent one is discharged；Control peristaltic pump quits work, while by nine port valve valve core rotations to the access port of reagent one, by nine port valve common ports
Connect with the access port of reagent one, control peristaltic pump is rotated forward, and a kind of reagent one of quantitative loop is sucked into quantitative loop three, candidate agent
One fully enters after quantitative loop three, and fluid sensor one can't detect liquid level, and its indicator lamp is bright, while signal is fed back to can compile
Journey logic controller, programmable logic controller (PLC) sends to motor one and instructs, and control peristaltic pump quits work；Motor
Two drive nine port valve valve core rotations to reaction tube access port, and nine port valve common ports are connected with reaction tube access port, and control is wriggled
Pump is rotated backward, and the reagent one that will be stored in quantitative loop is pushed in reaction tube；
The sampling process of reagent two is identical with the employing process of reagent one, and difference is magnetic valve two, quantitative loop two and examination
The access port participation work of agent two.
6. the using method of hexavalent chromium water quality on-line computing model metering device according to claim 5, it is characterised in that：
The quantitative loop one, quantitative loop two and quantitative loop three are polyfluortetraethylene pipe.
7. the using method of hexavalent chromium water quality on-line computing model metering device according to claim 5, it is characterised in that：
The fluid sensor one and fluid sensor two are photoelectric liquid level sensor.
8. the using method of hexavalent chromium water quality on-line computing model metering device according to claim 5, it is characterised in that：
The magnetic valve one, magnetic valve two and magnetic valve three are two-bit triplet magnetic valve, including common port COM, air connection end NC
With normally opened end NO.
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| CN201610845845.XA CN106645609B (en) | 2016-09-23 | 2016-09-23 | A kind of hexavalent chromium water quality on-line computing model metering device and its application method |
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| CN201610845845.XA CN106645609B (en) | 2016-09-23 | 2016-09-23 | A kind of hexavalent chromium water quality on-line computing model metering device and its application method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107831121A (en) * | 2017-11-22 | 2018-03-23 | 江苏蓝创智能科技股份有限公司 | Multi-parameter water quality detector and its application method |
| CN107843703A (en) * | 2017-11-22 | 2018-03-27 | 江苏蓝创智能科技股份有限公司 | The check system and method for calibration of water quality testing meter |
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