CN205015745U - Add medicine flow closed loop control system based on measuring pump - Google Patents
Add medicine flow closed loop control system based on measuring pump Download PDFInfo
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- CN205015745U CN205015745U CN201520784400.6U CN201520784400U CN205015745U CN 205015745 U CN205015745 U CN 205015745U CN 201520784400 U CN201520784400 U CN 201520784400U CN 205015745 U CN205015745 U CN 205015745U
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- flow controller
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- 239000003814 drug Substances 0.000 title abstract description 7
- 238000001514 detection method Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical compound [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010000372 Accident at work Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model discloses an add medicine flow closed loop control system based on measuring pump. It including be used for detecting the transport flow of measuring pump and feed back the detected signal to flow controller's flow sensor, be used for according to the flow controller of the transport flow of the measuring signal control measuring pump of flow sensor feedback and be used for the measuring pump according to flow controller's the controllable flow of control signal output, flow sensor installs on the output pipeline of measuring pump, flow controller's input is connected to flow sensor's output, the control end of measuring pump is connected to flow controller's control end. The utility model discloses a flow sensor and flow controller detect the actual transport flow of measuring pump to carrying out closed loop flow control, both can having prevented excessively to add the medicine, cause the water aluminium ion that dispatches from the factory to exceed standard, energy saving and consumption reduction can discover in time again that the disconnected medicine phenomenon that equipment trouble arouses takes place, guarantees the production safety.
Description
Technical field
The utility model belongs to tap water technical field of producing, is specifically related to a kind of dosing flow closed-loop control system based on volume pump.
Background technology
Volume pump is the widely used dosing conveying equipment of tap water water and wastewater industry dosing process for purifying, and water factory's dosing of national big and medium-sized cities more than 90% all adopts volume pump as conveying mechanism.Volume pump is a kind of volumetric pump of reciprocating running, quantitatively can carry the equipment of liquid, and it is mainly through changing the amount of conveying liquid to the adjustment of its stroke (change volume size) and frequency (changing reciprocating operation speed).The range of adjustment of its frequency is generally 20Hz-50Hz, and the setting range of stroke is 10%-100%.The mode of operation of volume pump is the frequency manually being changed volume pump by variable-frequence governor, manually changes metering throw of pump by rotary metering throw of pump knob at the scene.General control method is, metering throw of pump is adjusted to coarse adjustment, and frequency adjustment is fine tuning.
The flow rate calculation formula of volume pump is in theory:
in formula, Q
ifor actual flow, Q
sfor the maximum range of volume pump, F is volume pump actual motion frequency, and X is volume pump actual motion stroke.
Because volume pump is as a kind of volumetric pump, the adjustment of stroke and frequency can regulate the operational throughput of volume pump linearly theoretically, as long as therefore operating personnel are accustomed to thinking linear change stroke and frequency, the flow of volume pump conveying also can linearly change, and detects without the need to the feed flow of flow sensor to volume pump.
But according to actual measurement, the especially domestic volume pump of volume pump exists more serious non-linear; From a large amount of volume pump operative practice, along with the working time of volume pump constantly increases, its barrier film degradation increases (within general 2 years, will change a barrier film), and the flow of volume pump also can substantial deviation calculated value.The problem of most critical is, operating personnel are it is of concern that need the change according to source water parameter, the size of actual chemical feeding quantity is controlled, and volume pump is the equipment of a kind of open loop and fuzzy operation, non-linear due to volume pump, the flow of volume pump delivered inside is how many operating personnel and does not know actually; Thisly do not know feed flow and operate the pattern of volume pump blindly, be easy to cause operating personnel in order to prevent output water not up to standard the situation of excessive dosing, thus cause output water very clear but the safe drinking water hidden danger that exceeds standard of aluminium ion; And when barrier film deterioration causes feed flow less than normal, muddy water accident can be caused again to jeopardize the production safety of dosing purification; When there being foreign matter to get stuck in volume pump, feed flow also can being caused to be zero, to cause serious industrial accident; In addition, the coarse adjustment of volume pump and fine tuning operation all need manually to operate at the scene, cannot realize Long-distance Control and robotization.
Summary of the invention
The purpose of this utility model is exactly the deficiency existed to solve above-mentioned background technology, provides a kind of low, safe and reliable dosing flow closed-loop control system based on volume pump that consumes energy.
The technical solution adopted in the utility model is: a kind of dosing flow closed-loop control system based on volume pump, comprise the feed flow for detecting volume pump and feed back the flow sensor of detection signal to flow controller, detection signal for feeding back according to flow sensor controls the flow controller of the feed flow of volume pump and the volume pump for exporting flow-controllable according to the control signal of flow controller, described flow sensor is arranged on the output channel of volume pump, the input end of the output terminal connection traffic controller of described flow sensor, the control end of described flow controller connects the control end of volume pump.
Further, also comprise the variable-frequence governor for controlling volume pump frequency, the output terminal of described flow controller connects the input end of variable-frequence governor, the output terminal of described variable-frequence governor connects the frequency control terminal of volume pump, and the control end of described flow controller connects metering throw of pump control end.
Further, described flow controller is the variable-frequence governor that can control volume pump frequency, and the output terminal of described variable-frequence governor connects the frequency control terminal of volume pump.
Further, described volume pump is provided with two, and the output channel of two volume pumps overlaps, and described flow sensor is arranged on coincidence pipeline, and the control end of described flow controller connects the control end of a wherein volume pump.
The utility model increases dosing flow sensor to detect the feed flow of volume pump truly on the conveying loop of volume pump, increase the electronic Fill argon clamping fixture of volume pump so that Long-distance Control, increase closed-loop control software and the hardware support kit system of the two regulating parameter co-ordination of flow of volume pump, by flow sensor and flow controller, the actual fed flow to this positive displacement quantitative flow of volume pump conveying device detects, and carry out closed loop flow control, tap water purifying process dosing flow is carried from manual site, open loop (without feedback) and indirectly fuzzy (operating personnel only know frequency and the stroke of volume pump, do not know feed flow is how many actually) mode of operation be promoted to advanced remote auto, closed loop, the flow mode of movement that flow is directly accurate, both excessive dosing can be prevented, output water aluminium ion is caused to exceed standard, energy-saving and cost-reducing, can the disconnected medicine phenomenon that causes of Timeliness coverage equipment failure occur again, ensure production safety, there is significant Social and economic benef@.
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram of control system of the present utility model.
Fig. 2 is the another kind of schematic diagram of control system of the present utility model.
Fig. 3 is another schematic diagram of control system of the present utility model.
In figure: 1-flow sensor; 2-flow controller; 3-variable-frequence governor; 4-volume pump.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, is convenient to be well understood to the utility model, but they do not form restriction to the utility model.
The parameter that the present invention regulates is metering throw of pump and frequency two amount, and wherein stroke is coarse adjustment, and frequency is fine tuning, and the signal coordinating coarse adjustment that flow controller is fed back by flow sensor and fine tuning action, reach the effect of precise hard_drawn tuhes flow.Every platform volume pump has a specified range, stroke value can be set as the gear that several and flow range are roughly corresponding, when given flow changes, corresponding stroke gear can be obtained according to this flow range, controller controls volume pump and works according to new stroke gear, carry out flow coarse adjustment, then adopt various control algorithm to carry out fine tuning by the frequency changing volume pump according to error that is given and detected value; When frequency adjusts to the upper limit or lower limit, when the error of measured discharge and set-point is still large, controller can be coordinated by the gear increasing or reduce range of metering pump, and flow control can high-precisionly be carried out all the time.
System composition as shown in Figure 1, comprise the feed flow for detecting volume pump and feed back detection signal to flow controller flow sensor 1, control the flow controller 2 of the feed flow of volume pump and the volume pump 4 for exporting flow-controllable according to the control signal of flow controller 2 for the detection signal that feeds back according to flow sensor 1, described flow sensor 1 is arranged on the output channel 5 of volume pump 4, the input end of the output terminal connection traffic controller 2 of described flow sensor 1, the control end of described flow controller 2 connects the control end of volume pump 4.Wherein, volume pump 4 is the volume pump of charged dynamic stroke controller, flow controller 2 can be PLC, or other control device, flow sensor 1 gathers feed flow and detection signal is issued flow controller, the Setting signal of flow controller 2 can be the flow control commands that remote control computer passes down, also can directly set at the scene, according to given flow signal and the actual difference detecting flow, the frequency of dynamic change volume pump 4 and stroke, the flocculating agent flow that volume pump is carried changes, coarse adjustment and fine tuning order are provided to volume pump, reach the requirement of flow actual value close to setting value, thus realize the target of flow closed-loop control.
Flow controller 2 only controls one (frequency or stroke) in the middle of two controlled variables of volume pump 4, is fed back the flow closed-loop control realized based on volume pump 4 by flow sensor 1.Wherein be divided into 4 kinds of situations:
(A), as shown in Figure 1, the frequency of volume pump 4 is fixed or is manually adjusted, and is controlled the stroke of volume pump 4 by flow controller 2, feeds back flow signal by flow sensor 1, forms the flow closed-loop control based on volume pump.
(B), as shown in Figure 1, in some cases, also can only using volume pump parameters frequency or stroke as regulating parameter, another parameter is fixed or interval adjustment, now volume pump 4 is the volume pump of interior band volume pump frequency control, does not need variable-frequence governor, directly adopts 4-20mA or digital communication mode to control volume pump running frequency by flow controller 2, change flow, realize the flow closed-loop control based on volume pump.
(C), as shown in Figure 2, also comprise the variable-frequence governor 3 (or claiming digital frequency-variable controller) for controlling volume pump frequency, the output terminal of flow controller 2 connects the input end of variable-frequence governor 3, the output terminal of variable-frequence governor 3 connects the frequency control terminal of volume pump 4, and the control end of flow controller 2 connects the stroke control end of volume pump 4.Flow sensor 1 feeds back flow signal to flow controller 2, and flow controller 2 is controlled the frequency of volume pump by variable-frequence governor or volume pump digitial controller (or claiming digital frequency-variable controller), realizes the closed-loop control of flow; After flow control scope exceeds the scope of Single Parameter Control, another controlled variable then adopt manually or remotely changing set amount to expand the closed-loop control scope of flow.The setting of flow both can remote setting, also can on-the-spot set.
(D), when flow controller is the variable-frequence governor that can control volume pump frequency, as shown in Figure 3, now the output terminal of variable-frequence governor connects the frequency control terminal of volume pump, the signal of flow sensor directly feeds back to variable-frequence governor or digital metering pump controller, completed the closed-loop control of the flow based on volume pump by it, another parameter (stroke) of volume pump manually operates realization.The setting of flow both can remote setting, also can on-the-spot set.
The volume pump closed-loop control system of the utility model dosing flow also has a very important function, namely automatically can build a production safety security system.Reaction effect after the water dosing of general source all will arrive very long retardation time and can detect that (detection precipitates the turbidity of water after reaction precipitation, 1-2 hour general retardation time), as occurred, disconnected medicine detects after 1 hour that precipitation water turbidity exceeds standard, whole production run is irreversible, can cause that the finished product water of water factory's reservoir is all contaminated to exceed standard, whole water factory only has step-down to stop production, the water of finished product reservoir is all drained and again produces, cause extremely bad social influence and very large economic loss.And this patent closed loop flow controls have a very important feature can build the automatic security system of dosing production safety exactly.As shown in Figure 4, volume pump 4 is provided with two, and the output channel of two volume pumps 4 overlaps, and flow sensor 1 is arranged on coincidence pipeline 6, and the control end of flow controller 2 connects the control end of a wherein volume pump 4.As wherein the frequency of a volume pump and valve opening ought all reached maximum, actual flow is substantial deviation set-point still, will start another volume pump, thus stops disconnected medicine phenomenon and occur, and ensures production safety.Two casing valve systems at ordinary times exchange-column shift use, and ensure the integrity of system.
This control system is except can except precise hard_drawn tuhes dosing flow, and volume pump gets stuck and barrier film deterioration etc. does not allow detectable hidden trouble of equipment to be included in the monitoring of system yet.Operating personnel only need, according to the change of source water parameter, to set chemical feeding quantity, and flow controller automatically adjusts to metering throw of pump and frequency according to given flow.When stroke and frequency are all transferred to the upper limit, actual flow when still substantial deviation setting requires (given flow be less than the maximum rated flow condition of volume pump under) system can report to the police, the fault of prompting volume pump, and automatic emergency starts back-up system.Meaning of the present invention is also for majority in the water factory using volume pump as flocculating agent conveying equipment, only need to increase the electronic Fill argon clamping fixture of volume pump and relevant flow monitoring and controller, original artificial workshop-based production model one just can be made to jump as the automation mechanized operation pattern of advanced person, the input improvement expenses of equipment and the workload of transformation are all little, and user is acceptant.
The content be not described in detail in this instructions belongs to the known prior art of professional and technical personnel in the field.
Claims (4)
1. the dosing flow closed-loop control system based on volume pump, it is characterized in that: comprise the feed flow for detecting volume pump and feed back the flow sensor (1) of detection signal to flow controller, detection signal for feeding back according to flow sensor controls the flow controller (2) of volume pump feed flow and the volume pump (4) for exporting flow-controllable according to the control signal of flow controller, described flow sensor (1) is arranged on the output channel of volume pump (4), the input end of the output terminal connection traffic controller (2) of described flow sensor (1), the control end of described flow controller (2) connects the control end of volume pump (4).
2. the dosing flow closed-loop control system based on volume pump according to claim 1, it is characterized in that: also comprise the variable-frequence governor (3) for controlling volume pump frequency, the output terminal of described flow controller (2) connects the input end of variable-frequence governor (3), the output terminal of described variable-frequence governor (3) connects the frequency control terminal of volume pump (4), and the control end of described flow controller (2) connects the stroke control end of volume pump (4).
3. the dosing flow closed-loop control system based on volume pump according to claim 1, it is characterized in that: described flow controller (2) is the variable-frequence governor that can control volume pump frequency, the output terminal of described variable-frequence governor connects the frequency control terminal of volume pump.
4. the dosing flow closed-loop control system based on volume pump according to claim 1, it is characterized in that: described volume pump (4) is provided with two, the output channel of two volume pumps (4) overlaps, described flow sensor (1) is arranged on coincidence pipeline, and the control end of described flow controller (2) connects the control end of a wherein volume pump (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520784400.6U CN205015745U (en) | 2015-10-10 | 2015-10-10 | Add medicine flow closed loop control system based on measuring pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520784400.6U CN205015745U (en) | 2015-10-10 | 2015-10-10 | Add medicine flow closed loop control system based on measuring pump |
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| CN205015745U true CN205015745U (en) | 2016-02-03 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106774462A (en) * | 2016-11-17 | 2017-05-31 | 浙江工业大学 | Using the detection of digital frequency conversion controller and the method for regulation flow under DCS environment |
| CN108843547A (en) * | 2018-06-14 | 2018-11-20 | 广州飞升精密设备有限公司 | A kind of automatic adjustment metering pump-regulating mechanism and automatic adjustment metering pump |
| CN109980997A (en) * | 2019-04-12 | 2019-07-05 | 艺达思科技（苏州）有限公司 | Metering pump, frequency-variable controller and its control method |
| CN111472967A (en) * | 2020-04-08 | 2020-07-31 | 中国石油天然气股份有限公司 | Automatic discharge capacity adjusting system and method for dosing pump |
| CN112426972A (en) * | 2020-12-03 | 2021-03-02 | 丰耒（上海）智能科技有限公司 | Agricultural medicine dispensing system with separated liquid medicine and medicine dispensing method thereof |
| CN112814882A (en) * | 2020-12-31 | 2021-05-18 | 深圳市弗赛特科技股份有限公司 | Electric chemical agent injection system capable of automatically adjusting flow |
-
2015
- 2015-10-10 CN CN201520784400.6U patent/CN205015745U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106774462A (en) * | 2016-11-17 | 2017-05-31 | 浙江工业大学 | Using the detection of digital frequency conversion controller and the method for regulation flow under DCS environment |
| CN108843547A (en) * | 2018-06-14 | 2018-11-20 | 广州飞升精密设备有限公司 | A kind of automatic adjustment metering pump-regulating mechanism and automatic adjustment metering pump |
| CN108843547B (en) * | 2018-06-14 | 2020-02-21 | 广州飞升精密设备有限公司 | Automatic adjusting metering pump adjusting mechanism and automatic adjusting metering pump |
| CN109980997A (en) * | 2019-04-12 | 2019-07-05 | 艺达思科技（苏州）有限公司 | Metering pump, frequency-variable controller and its control method |
| CN111472967A (en) * | 2020-04-08 | 2020-07-31 | 中国石油天然气股份有限公司 | Automatic discharge capacity adjusting system and method for dosing pump |
| CN112426972A (en) * | 2020-12-03 | 2021-03-02 | 丰耒（上海）智能科技有限公司 | Agricultural medicine dispensing system with separated liquid medicine and medicine dispensing method thereof |
| CN112814882A (en) * | 2020-12-31 | 2021-05-18 | 深圳市弗赛特科技股份有限公司 | Electric chemical agent injection system capable of automatically adjusting flow |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191224 Address after: No. 1002, building 8, SBI Chuangye street, Dongxin Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: Wuhan Tianzhiqiao Technology Co., Ltd. Address before: 430077 Hubei city of Wuhan Province East Pavilion Garden District Wuchang District Bi Zhu Yuan room 3-802 Patentee before: Yang Xiaolin |
|
| TR01 | Transfer of patent right |