CN103543758A - Device for indirectly measuring and controlling liquid flow - Google Patents
Device for indirectly measuring and controlling liquid flow Download PDFInfo
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- CN103543758A CN103543758A CN201310495512.5A CN201310495512A CN103543758A CN 103543758 A CN103543758 A CN 103543758A CN 201310495512 A CN201310495512 A CN 201310495512A CN 103543758 A CN103543758 A CN 103543758A
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Abstract
The invention relates to a device for indirectly measuring a gas pressure membrane and controlling flow. The device comprises a tank and the isolating membrane. The isolating membrane is mounted in the tank and divides the tank into a gas tank and a liquid tank, a gas control port is formed in the gas tank and is connected with a gas pipeline, a liquid access opening is formed in the liquid tank and is connected with a liquid pipeline by a liquid channel switching mechanism, liquid in the liquid tank can be drained and sucked under positive and negative pressure switching control of the gas tank, both the gas pipeline and the liquid channel switching mechanism of the liquid pipeline are controlled by a control unit, the liquid channel switching mechanism is fixedly arranged at the bottom of the liquid tank, and a weight sensor is fixedly arranged at the bottom of the liquid channel switching mechanism and is connected to the control unit. The device for controlling a liquid level has the advantages that the device is scientific and reasonable in structural design, and the weight of the liquid is measured by the weight sensor, so that an effect of indirectly controlling the flow of the liquid can be realized, the device is good in repeatability and is rarely affected by the external.
Description
Technical field
The present invention relates to liquid measure control device, particularly a kind of indirect measurement control the device of fluid flow.
Background technology
In the fields such as medical treatment and chemical industry, often need to control liquid measure.Existing liquid measure control device comprises contact and contactless.Contact liquid measure control device, as flow sensor, it requires must, without solid impurity, could realize comparatively accurately and controlling through the liquid in sensor in use.But, when specific works, particularly, when medical field is applied, in the body fluid of the liquid measure of flowing through control device, often can comprise some solid dirts, the accuracy that impact is measured and controlled.Contactless volume control device, as sonac or infrared sensor, it is when work, cannot realize the separated of detected space internal liquid and gas, easily on even popping one's head in detected space, there is water vapor, or have air pocket in liquid, and cause the out of true of measuring and controlling.
For example, for gastric lavage device, it comprises clear water fluid reservoir and dirt fluid reservoir, dirt fluid reservoir, then pumps into the clear water in clear water fluid reservoir in stomach the dirt sucking-off in patient's stomach by stomach tube, and the total amount of liquid that single is drawn and pumped in stomach is to rely on pressure transducer to control, after liquid canful, detected pressure value exceeds setting value, now by control gear, controls reversal valve, completes suction action and dirt is expelled to tank body outside.This kind of pressure transducer control mode, has pressure protecting function, when pressure reaches certain value, no longer aspirates or pumps into, thereby avoiding occurring the excessive damage causing stomach of amount of liquid because aspirating or pumping into.But also there is certain deficiency in it, because stomach tube is thinner, very easily result in blockage, therefore, by pressure, determine suction or the amount of pumping into, out of true very, result of use is not good enough.
In addition, applicant researches and develops a kind of liquid measure control device in earlier stage, and it can be realized according to the individual different functions that set in advance maximum volume, but its control is open loop form, cannot adjust in real time according to actual conditions, and accuracy is controlled in impact.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of indirect measurement is provided and controls the device of fluid flow, it carries out liquid weighing measurement by weight sensor, and then realizes the effect of indirectly controlling fluid flow, there is repeatable accuracy good, be subject to the advantage that ectocine is little.
The present invention solves its technical matters and is achieved through the following technical solutions:
A kind of indirect measurement air pressure barrier film is controlled the device of flow, comprise tank body and barrier film, barrier film is arranged in tank body, tank body isolation is become to gas tank and flow container two parts, on gas tank, be shaped with gas control interface, this gas control interface connects gas piping, on flow container, be shaped with liquid entrance, this liquid entrance connects liquid line by liquid road switching mechanism, by the positive/negative-pressure conversion of gas tank, control discharge opeing and the imbibition of flow container, gas piping and liquid line Ye road switching mechanism are controlled by control module, it is characterized in that: described liquid road switching mechanism is packed in the bottom of flow container, the bottom of Ye road switching mechanism is fixedly mounted with a weight sensor, this weight sensor is connected to described control module.
And, also comprise a volume control gear, this volume control gear consists of adjustment plate, lift drive mechanism and sealing unit, adjustment plate level is arranged in gas tank, the made dish seat of adjustment plate end face is movably arranged on gas tank end face, between the dish seat of adjustment plate end face and gas tank end face, sealing unit is installed; Gas tank top is shaped with support box, on support box top, is fixedly mounted with lift drive mechanism, and the lifting driving stem lower end of this lift drive mechanism is stretched into support box inside and is fixedly mounted with the dish seat of adjustment plate end face, and lift drive mechanism is electrically connected to described control module.
And described sealing unit is grommet type seals.
And, between the end face inside surface of support box and the dish seat upper surface of adjustment plate, the ripple sealing shroud that is set in lifting driving stem outside is installed.
And described lift drive mechanism is linear electric motors.
And, on the top, lifting driving stem top of linear electric motors, one photoelectric sensor being installed, this photoelectric sensor is connected to control module.
And, in the lifting driving stem parallel sided of linear electric motors, grating sensor being installed, this grating sensor is connected to control module.
And described lift drive mechanism is that multiple spot is controlled straight line driving mechanism.
Advantage of the present invention and beneficial effect are:
1. indirectly measure and control the device of fluid flow, by weight sensor, realize weighing to tank body, thus when the liquid entrance of flow container commutates, read measured value, this is measured as discontinuous and measures, when measured value hour, be liquid weight hour, the unactual setting value that reaches of liquid measure is described, thus, can adjust imbibition action, increase in proportion imbibition number of times, to meet the requirement to total amount of liquid, this structure goes for dirt fluid reservoir and the clear water fluid reservoir of paunch flusher.
2. the device of indirectly measuring and control fluid flow, can combine with volume control gear, to be applicable to the request for utilization of Different Individual.
3. indirectly measure and control the device of fluid flow, between gas tank and flow container, adopt barrier film to isolate, liquid enters or discharges from liquid entrance, mutually isolate with upper space, thereby avoid liquid to impact volume control module and air pressure control module, realize the cleaning liquid degree no requirement (NR) in the device of flowing through.
4. the device of indirectly measuring and control fluid flow arranges grommet type seals between adjustment plate upper disc seat and gas tank end face, guarantees that the gaseous tension in upper tank body does not leak, and guarantees running stability and the reliability of pneumoelectric control module; And, ripple sealing shroud is also installed in support box, further improve gas tightness in tank body, also can adapt to the lifting action of lifting driving stem simultaneously, design ingeniously, sealing effectiveness is good.
5. the device of indirectly measuring and control fluid flow, lift drive mechanism can adopt linear electric motors, and it realizes accurate rising and down maneuver by control module; Lift drive mechanism also can adopt multiple spot to control straight line cylinder, also can realize rising or the down maneuver of multi-point under the control of control module, meets request for utilization.
6. indirectly measure and control the device of fluid flow, when adopting linear electric motors as lift drive mechanism, on its top, lifting driving stem top, one photoelectric sensor is installed, it can realize the setting of lifting driving stem reference position, so that determine reference value, thereby carry out according to actual needs volume adjustment.
7. indirectly measure and control the device of fluid flow, when adopting linear electric motors as lift drive mechanism, by the parallel sided at its lifting driving stem, grating sensor is installed, can realize the real-time detection to lifting driving stem shift position, realizing closed loop accurately controls, can whether the action of lifting driving stem be put in place and be detected simultaneously, avoid because the adjustment plate height that in tank body, solid matter card is stumbled or equipment failure causes is inaccurate, improve the security that device is used.
8. liquid measure control device of the present invention, scientific structure design is reasonable, by weight sensor, carry out liquid weighing measurement, and then the effect of fluid flow is controlled in realization indirectly, there is repeatable accuracy good, be subject to the advantage that ectocine is little, have advantages of that control is accurate, easy and simple to handle, applied widely simultaneously.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of the another kind of embodiment of the present invention.
Description of reference numerals:
1-gas control interface, 2-gas tank, 3-barrier film, 4-flow container, 5-weight sensor, 6-liquid entrance, 7-lifting driving stem, 8-linear electric motors, 9-support box end face, 10-support box, 11-ripple sealing shroud, 12-dish seat, 13-grommet type seals, 14-adjustment plate, 15-control module, 16-photoelectric sensor ,17-Ye road switching mechanism, 18-grating sensor.
Embodiment
Below by specific embodiment, the invention will be further described, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
A kind of indirect measurement is also controlled the device of fluid flow, comprise tank body and barrier film 3, barrier film is arranged in tank body, tank body isolation is become to gas tank 2 and flow container 4 two parts, be shaped with gas control interface 1 on gas tank, this gas control interface connects gas piping, on flow container, be shaped with liquid entrance 6, this liquid entrance connects liquid line ，Ye road switching mechanism applicant by liquid road switching mechanism 17 and in first to file, crosses patent, does not repeat them here.Gas piping and liquid line are controlled by control module, by the positive/negative-pressure conversion of gas tank, control discharge opeing and the imbibition of flow container, its innovation is: liquid road switching mechanism is packed in the bottom of flow container, the bottom of Ye road switching mechanism is horizontally installed with a weight sensor 5 by bolt, and this weight sensor is connected to described control module.Gas control interface is arranged on the upper portion side wall of flow container, and liquid entrance is arranged on the centre position, bottom of flow container, thereby makes structure compacter, saves space.Liquid road switching mechanism and the flow container being fixedly mounted with are positioned at one end upper position of weight sensor.Realize high precision, the sensitivity measure of weight sensor.
As shown in Figure 2, can also comprise a volume control gear, this volume control gear consists of adjustment plate 14, lift drive mechanism and sealing unit, adjustment plate level is arranged in gas tank, the made dish seat 12 of adjustment plate end face is movably arranged on gas tank end face, between the dish seat of adjustment plate end face and gas tank end face, sealing unit is installed, sealing unit is grommet type seals 13.Gas tank top is shaped with support box 10, on support box top, is fixedly mounted with lift drive mechanism, and lifting driving stem 7 lower ends of this lift drive mechanism are stretched into support box inside and are fixedly mounted with the dish seat of adjustment plate end face 9, and lift drive mechanism is electrically connected to described control module 15.Between the end face inside surface of support box and the dish seat upper surface of adjustment plate, the ripple sealing shroud 11 that is set in lifting driving stem outside is installed.Lift drive mechanism is linear electric motors 8.Top, lifting driving stem top at linear electric motors is provided with a photoelectric sensor 16, and this photoelectric sensor is connected to control module.Can also grating sensor 18 be installed in the lifting driving stem parallel sided of linear electric motors, this grating sensor is connected to control module.Lift drive mechanism can also be controlled straight line cylinder for multiple spot.
This principle of work of indirectly measuring and controlling the device of fluid flow is:
By weight sensor, realize the weighing of tank body, when the liquid entrance of flow container commutates, read measured value thus, this is measured as discontinuous and measures, when measured value hour, liquid weight hour, illustrates the unactual setting value that reaches of liquid measure, thus, can adjust imbibition action, increase in proportion imbibition number of times, to meet the requirement to total amount of liquid, combine with volume control gear, to be applicable to the request for utilization of Different Individual.This structure goes for dirt fluid reservoir and the clear water fluid reservoir of paunch flusher, also applicable to liquid, loads in mixture the control of flow.
Although disclose for the purpose of illustration embodiments of the invention and accompanying drawing, but it will be appreciated by those skilled in the art that: within not departing from the spirit and scope of the present invention and claims, various replacements, variation and modification are all possible, therefore, scope of the present invention is not limited to embodiment and the disclosed content of accompanying drawing.
Claims (8)
1. indirectly measure the device that air pressure barrier film is controlled flow for one kind, comprise tank body and barrier film, barrier film is arranged in tank body, tank body isolation is become to gas tank and flow container two parts, on gas tank, be shaped with gas control interface, this gas control interface connects gas piping, on flow container, be shaped with liquid entrance, this liquid entrance connects liquid line by liquid road switching mechanism, by the positive/negative-pressure conversion of gas tank, control discharge opeing and the imbibition of flow container, gas piping and liquid line Ye road switching mechanism are controlled by control module, it is characterized in that: described liquid road switching mechanism is packed in the bottom of flow container, the bottom of Ye road switching mechanism is fixedly mounted with a weight sensor, this weight sensor is connected to described control module.
2. indirect measurement according to claim 1 control the device of fluid flow, it is characterized in that: also comprise a volume control gear, this volume control gear consists of adjustment plate, lift drive mechanism and sealing unit, adjustment plate level is arranged in gas tank, the made dish seat of adjustment plate end face is movably arranged on gas tank end face, between the dish seat of adjustment plate end face and gas tank end face, sealing unit is installed; Gas tank top is shaped with support box, on support box top, is fixedly mounted with lift drive mechanism, and the lifting driving stem lower end of this lift drive mechanism is stretched into support box inside and is fixedly mounted with the dish seat of adjustment plate end face, and lift drive mechanism is electrically connected to described control module.
3. indirect measurement according to claim 2 control the device of fluid flow, is characterized in that: described sealing unit is grommet type seals.
4. indirect measurement according to claim 2 control the device of fluid flow, is characterized in that: between the end face inside surface of support box and the dish seat upper surface of adjustment plate, the ripple sealing shroud that is set in lifting driving stem outside is installed.
5. indirect measurement according to claim 2 control the device of fluid flow, is characterized in that: described lift drive mechanism is linear electric motors.
6. indirect measurement according to claim 5 control the device of fluid flow, is characterized in that: the top, lifting driving stem top at linear electric motors is provided with a photoelectric sensor, and this photoelectric sensor is connected to control module.
7. indirect measurement according to claim 5 control the device of fluid flow, is characterized in that: the lifting driving stem parallel sided at linear electric motors is provided with grating sensor, and this grating sensor is connected to control module.
8. indirect measurement according to claim 2 control the device of fluid flow, is characterized in that: described lift drive mechanism is that multiple spot is controlled straight line driving mechanism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310495512.5A CN103543758A (en) | 2013-10-21 | 2013-10-21 | Device for indirectly measuring and controlling liquid flow |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310495512.5A CN103543758A (en) | 2013-10-21 | 2013-10-21 | Device for indirectly measuring and controlling liquid flow |
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| CN103543758A true CN103543758A (en) | 2014-01-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105798044A (en) * | 2016-03-10 | 2016-07-27 | 济南海能仪器股份有限公司 | Waste drainage device for fiber analyzer |
| CN108227762A (en) * | 2016-12-13 | 2018-06-29 | 株式会社堀场Stec | Flow rate calculation system and method for calculating flux |
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| CN201235140Y (en) * | 2008-07-11 | 2009-05-13 | 广州白云蓝天电子科技有限公司 | Automatic pollution discharge aspirator |
| US20090235993A1 (en) * | 2008-03-19 | 2009-09-24 | Ckd Corporation | Flow rate control device |
| CN102645934A (en) * | 2012-04-12 | 2012-08-22 | 天津市同业科技发展有限公司 | Pneumatic-electric-control volume-variable type amount of liquid control device |
| CN102692254A (en) * | 2012-06-15 | 2012-09-26 | 漳州捷龙自动化技术有限公司 | Dual-weight reducing flow measuring system |
| CN203490541U (en) * | 2013-10-21 | 2014-03-19 | 天津市同业科技发展有限公司 | Indirect measurement type liquid flow control device |
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2013
- 2013-10-21 CN CN201310495512.5A patent/CN103543758A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090235993A1 (en) * | 2008-03-19 | 2009-09-24 | Ckd Corporation | Flow rate control device |
| CN201235140Y (en) * | 2008-07-11 | 2009-05-13 | 广州白云蓝天电子科技有限公司 | Automatic pollution discharge aspirator |
| CN102645934A (en) * | 2012-04-12 | 2012-08-22 | 天津市同业科技发展有限公司 | Pneumatic-electric-control volume-variable type amount of liquid control device |
| CN102692254A (en) * | 2012-06-15 | 2012-09-26 | 漳州捷龙自动化技术有限公司 | Dual-weight reducing flow measuring system |
| CN203490541U (en) * | 2013-10-21 | 2014-03-19 | 天津市同业科技发展有限公司 | Indirect measurement type liquid flow control device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105798044A (en) * | 2016-03-10 | 2016-07-27 | 济南海能仪器股份有限公司 | Waste drainage device for fiber analyzer |
| CN108227762A (en) * | 2016-12-13 | 2018-06-29 | 株式会社堀场Stec | Flow rate calculation system and method for calculating flux |
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Application publication date: 20140129 |