CN101988844A - Double-tube intermittent frothing type liquid indicator - Google Patents
Double-tube intermittent frothing type liquid indicator Download PDFInfo
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- CN101988844A CN101988844A CN 201010545241 CN201010545241A CN101988844A CN 101988844 A CN101988844 A CN 101988844A CN 201010545241 CN201010545241 CN 201010545241 CN 201010545241 A CN201010545241 A CN 201010545241A CN 101988844 A CN101988844 A CN 101988844A
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Abstract
The invention discloses a double-tube intermittent frothing type liquid indicator, comprising a compressed air inlet, a filter, a high-position pipe solenoid valve, a low-position pipe solenoid valve, a high-position pipe pressure test unit, a low-position pipe pressure test unit, a high-position air conduit, a low-position air conduit, conduit blowing heads, a display unit, a calculation control unit and an open container. In the invention, an air passage is in such as structure that one end of an air conduit is horizontally and sequentially connected with the compressed air inlet and the filter and then is divided into the high-position air conduit and the low-position air conduit which are respectively connected with the solenoid valve and the pressure testing unit, and the other end of each air conduit is provided with the conduit blowing head and vertically arranged in the open container, and the altitude difference h of the high-position conduit blowing head and the low-position conduit blowing head is 1/10-1/20 of the range of the liquid indicator; and the high-position pipe pressure test unit, the low-position pipe pressure test unit, the solenoid valves and the display unit are connected with the calculation control unit through wires. By adopting the double-tube structure with the fixed altitude difference between the blowing heads in the invention, the liquid level value is only related to the pressure intensity ratio of the two tubes and the altitude difference between the blowing heads and has nothing to do with the liquid density, and thus, the measuring precision of the frothing type liquid indicator is greatly improved.
Description
Technical field
The present invention relates to a kind of level gauging instrument, specifically relate to the formula liquid level gauge that froths a kind of two-tube intermittence.
Background technology
Liquid level gauge is the device that is widely used in measuring liquid level height in the national economy every profession and trade.Liquid level commonly used is in respect of float-type, connected vessels type, differential pressure type, condenser type, the formula etc. that froths, to adapt to different use occasions.The formula liquid level gauge of frothing is to use the static pressure principle to measure the open-top receptacle liquid level, imports the conduit that is installed in the container after pressurized air reduces pressure after filtration, and gas stream outlet from container bottom behind conduit blows out.By fluid mechanics as can be known, under the constant condition of acceleration of gravity, the conduit back pressure that froths is relevant with liquid level and fluid density, also relevant with the resistance to flow of conduit, and resistance to flow is relevant with the hydrodynamic head, therefore, and during known fluid density, under the condition of gas flow and temperature constant, measure back pressure and just can be converted to liquid level.The formula that froths liquid level gauge is simple in structure, the reliability height, level gauging big for liquid viscosity, that have corrosivity or contain suspended particle has unique advantage, but because the valuator in the measurement mechanism can not make compressed air require definitely constant, the variation of the flow velocity variation of temperature variation and back pressure itself in addition causes dynamic head to change, so that the conduit resistance to flow changes, so measuring accuracy is lower.
Summary of the invention
The objective of the invention is to solve above-mentioned technical matters, the formula liquid level gauge that froths a kind of high-precision two-tube intermittence is provided in order to overcome the existing in prior technology defective.
To achieve these goals, technical scheme of the present invention is:
The formula liquid level gauge froths a kind of two-tube intermittence, comprise compressed air inlet 1, filtrator 2, high-order pipe solenoid valve 3, high-order pipe pressure test cell 4, high-order air conduit 5, conduit blow head 6, display unit 8, calculation control unit 9 and open-top receptacle 12, it is characterized in that: also include low level pipe solenoid valve 7, low level pipe pressure test cell 10 and low level air conduit 11; One end of described high-order air conduit 5 is connected to compressed air inlet 1, and level is connected with filtrator 2, high-order pipe solenoid valve 3 and high-order pipe pressure test cell 4 successively; High-order air conduit 5 is connected with the other end positioned vertical of conduit blow head 6-1 in open-top receptacle 12; One end of described low level air conduit 11 and high-order pipe common compression air in 1 and filtrator 2, and level is connected with low level pipe solenoid valve 7 and low level pipe pressure test cell 10 successively; Low level air conduit 11 is connected with the other end positioned vertical of conduit blow head 6-2 in open-top receptacle 12; Described high-order air conduit 5 and 11 parallel connections of low level air conduit are that assembly is installed, and high-order conduit blow head 6-1 and the difference in height of low level conduit blow head 6-2 in open-top receptacle 12 are certain value h; Described high-order pipe solenoid valve 3 is connected with calculation control unit 9 respectively by lead with low level pipe pressure test cell 10 with low level pipe solenoid valve 7 and high-order pipe pressure test cell 4; Described calculation control unit 9 is wired to display unit 8.
The diameter of the diameter of the above high-order conduit blow head 6-1 and the diameter ratio of high-order air conduit 5 and low level conduit blow head 6-2 and the diameter ratio of low level air conduit 11 are 5 ~ 15.
High-order conduit blow head (6-1) of the above and the difference in height h of low level conduit blow head (6-2) in open-top receptacle (12) are 1/10～1/20 of liquid level gauge range.
The above high-order pipe pressure test cell 4 and low level pipe pressure test cell 10 are formed by pressure transducer and transmitter, and wherein pressure transducer is made by pressure-active element.
The above calculation control unit 9 is made up of acquisition module 13, data-carrier store 14, central processing unit 15, output module 16 and program storage 17; Wherein, central processing unit 15 is connected with acquisition module 13, data-carrier store 14, output module 16 and program storage 17 respectively.
A set cover calculation control unit 9 and the display unit 8 of the formula liquid level gauge that froths two-tube intermittence of the present invention can insert one or more measuring system that froths, to realize the concentrated measurement of multi-way level.
The formula liquid level gauge froths a kind of two-tube intermittence of the present invention, measure static pressure owing to being under the static state at gas after the solenoid valve shuts gas circuit, thoroughly eliminated the influence of dynamic pressure to measuring accuracy, the size that is level value and conduit resistance to flow is irrelevant, again owing to adopt the fixedly double pipe structure of blow head difference in height, level value is only relevant with the blow head difference in height with the pressure ratio of two pipes, and irrelevant with fluid density, this will improve the measuring accuracy of the formula liquid level gauge that froths greatly.The present invention has reached basic improvement to existing in prior technology problem and defective, has guaranteed the precision and the quality of level gauging instrument.
The formula liquid level gauge that froths a kind of two-tube intermittence of the present invention is compared with the existing formula liquid level gauge that froths and is had the following advantages:
1, thoroughly eliminated the influence of dynamic pressure to measuring accuracy.
2, measuring system need not to be provided with valuator flow is controlled.
3, measuring system need not to understand the density of liquid of surveying.
4, each road measuring system that froths can be programmed the marked gas break-make respectively at interval, can realize difference
The multi-way level of liquid and different conduit placement of route is concentrated and is measured.
Description of drawings
Formula level gauge system synoptic diagram froths at Fig. 1, two-tube intermittence
Fig. 2, calculation control unit composition frame chart
Among the figure: 1. compressed air inlet, 2. filtrator, 3. high-order pipe solenoid valve, 4. high-order pipe pressure test is single
Unit, 5. high-order air conduit, the high-order conduit blow head of 6-1., 6-2. low level conduit blow head, 7. low level pipe solenoid valve, 8. display unit, 9. calculation control unit, 10. low level pipe pressure test cell, 11. low level air conduits, 12. open-top receptacle, 13. acquisition module, 14. data-carrier stores, 15. central processing units, 16. output module, 17. program storages.
Embodiment
Below in conjunction with accompanying drawing the formula liquid level gauge that froths a kind of two-tube intermittence of the present invention is described further.
As shown in Figure 1, the formula liquid level gauge that froths a kind of two-tube intermittence, an end of described high-order air conduit 5 is connected to compressed air inlet 1, and level is connected with filtrator 2, high-order pipe solenoid valve 3 and high-order pipe pressure test cell 4 successively; High-order pipe air conduit 5 is connected with the other end positioned vertical of conduit blow head 6-1 in open-top receptacle 12; One end of described low level air conduit 11 and high-order pipe common compression air in 1 and filtrator 2, and level is connected with low level pipe solenoid valve 7 and low level pipe pressure test cell 10 successively; Low level pipe air conduit 11 is connected with the other end positioned vertical of low level conduit blow head 6-2 in open-top receptacle 12; Described high-order air conduit 5 and 11 parallel connections of low level air conduit are that assembly is installed, and high-order conduit blow head 6-1 and the difference in height h of low level conduit blow head 6-2 in open-top receptacle 12 are 1/10～1/20 of liquid level gauge range; Described high-order pipe solenoid valve 3 is connected with calculation control unit 9 respectively by lead with low level pipe pressure test cell 10 with low level pipe solenoid valve 7 and high-order pipe pressure test cell 4; Described calculation control unit 9 is wired to display unit 8.
The pressure transducer that wherein said high-order pipe pressure test cell 4 and low level pipe pressure test cell 10 all adopt pressure-active element to make is converted to electric signal with pressure signal, is standard signal by pressure unit with the electrical signal conversion of pressure transducer.
Calculation control unit 9 as shown in Figure 2, form by acquisition module 13, data-carrier store 14, central processing unit 15, output module 16 and program storage 17, wherein, central processing unit 15 is connected with acquisition module 13, data-carrier store 14, output module 16 and program storage 17 respectively.
Gas passage of the present invention, insert pressurized air from compressed air inlet 1, remove impurity through filter 2, high-order pipe solenoid valve 3 and low level pipe solenoid valve 7 are controlled high-order air conduit 5 and low level air conduit 11 conducting at intermittence air-flows respectively, high-order pipe pressure test cell 4 and low level pipe pressure test cell 10 detect the gas-static that enters high-order air conduit 5 and low level air conduit 11 respectively, and gas finally is blown into the open-top receptacle 12 diffusing excessive in environment through liquid level from the outlet of two conduit blow heads 6.
Physical parameter conveying flow of the present invention, set the conducting of gas and closing time at interval by the central processing unit 15 of calculation control unit 9 according to the watchdog routine in the program storage 17, this carries out the keying of signal by output module 16 control high-order pipe solenoid valves 3 and low level pipe solenoid valve 7, closing time at interval in, air-flow remains static, the sensor and the transmitter of high-order pipe pressure test cell 4 and low level pipe pressure test cell 10 are electric signal with institute's measuring pressure Parameters Transformation, send into the acquisition module 13 of calculation control unit 9 respectively through lead, this module is a digital signal with electrical signal conversion, central processing unit 15 is converted to the level value signal according to the monitoring calculation procedure in the program storage 17 with the digital signal in the acquisition module 13 and imports output module 16 into, intermediate variable in the computation process and buffer memory variable will be stored in the data-carrier store 14, and the level value signal in the output module 16 imports display unit 8 into by lead.In order to reduce the influence of air compressibility to measuring accuracy, conduit blow head diameter is 5 ~ 15 with the ratio of conduit diameter.
A set cover calculation control unit 9 and the display unit 8 of the formula liquid level gauge that froths two-tube intermittence of the present invention can insert one or more measuring system that froths, to realize the concentrated measurement of multi-way level.
Calculation control unit 9 in the above-mentioned two-tube formula liquid level gauge that froths is surveyed two according to institute and is managed that back pressures compare and blow head difference in height h calculates the liquid level of surveying by the hydrostatics principle.
Claims (5)
1. the formula liquid level gauge froths a two-tube intermittence, comprise compressed air inlet (1), filtrator (2), high-order pipe solenoid valve (3), high-order pipe pressure test cell (4), high-order air conduit (5), conduit blow head (6-1), display unit (8), calculation control unit (9) and open-top receptacle (12), it is characterized in that: also include low level pipe solenoid valve (7), low level pipe pressure test cell (10) and low level air conduit (11); One end of described high-order air conduit (5) is connected to compressed air inlet (1), and level is connected with filtrator (2), high-order pipe solenoid valve (3) and high-order pipe pressure test cell (4) successively; High-order pipe air conduit (5) is connected with the other end positioned vertical of conduit blow head (6-1) in open-top receptacle (12); Described low level air conduit (11) is settled for horizontal parallel with high-order air conduit (5), and an end of low level air conduit (11) connects filtrator (2), and is connected with low level pipe solenoid valve (7) and low level pipe pressure test cell (10) successively; Low level pipe air conduit (11) is connected with the other end positioned vertical of conduit blow head (6-2) in open-top receptacle (12); Described high-order conduit blow head (6-1) and the difference in height of low level conduit blow head (6-2) in open-top receptacle (12) are h; Described high-order pipe solenoid valve (3) is connected with calculation control unit (9) respectively by lead with low level pipe pressure test cell (10) with low level pipe solenoid valve (7) and high-order pipe pressure test cell (4); Described calculation control unit (9) is wired to display unit (8).
2. the formula liquid level gauge that froths two-tube intermittence according to claim 1, it is characterized in that: the diameter ratio of the diameter ratio of the diameter of described high-order air conduit blow head (6-1) and high-order air conduit (5) and the diameter of low level air conduit blow head (6-2) and low level air conduit (11) is 5 ~ 15.
3. the formula liquid level gauge froths two-tube intermittence according to claim 1, it is characterized in that: described high-order pipe pressure test cell (4) and low level pipe pressure test cell (10) are formed by pressure transducer and transmitter, and wherein pressure transducer is made by pressure-active element.
4. the formula liquid level gauge that froths two-tube intermittence according to claim 1, it is characterized in that: described calculation control unit (9) is made up of acquisition module (13), data-carrier store (14), central processing unit (15), output module (16) and program storage (17); Wherein, central processing unit (15) connects acquisition module (13), data-carrier store (14), output module (16) and program storage (17) respectively.
5. the formula liquid level gauge that froths two-tube intermittence according to claim 1, it is characterized in that: described high-order conduit blow head (6-1) and the difference in height h of low level conduit blow head (6-2) in open-top receptacle (12) are 1/10～1/20 of liquid level gauge range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010545241 CN101988844A (en) | 2010-11-16 | 2010-11-16 | Double-tube intermittent frothing type liquid indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010545241 CN101988844A (en) | 2010-11-16 | 2010-11-16 | Double-tube intermittent frothing type liquid indicator |
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| CN101988844A true CN101988844A (en) | 2011-03-23 |
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| CN 201010545241 Pending CN101988844A (en) | 2010-11-16 | 2010-11-16 | Double-tube intermittent frothing type liquid indicator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579937A (en) * | 2018-12-28 | 2019-04-05 | 中国工程物理研究院化工材料研究所 | A kind of warm isostatic pressing machine working cylinder liquid level detection system of realization and detection method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4393705A (en) * | 1981-07-27 | 1983-07-19 | Micro-Plate, Inc. | Specific gravity level gauge and method |
| US4669309A (en) * | 1980-09-19 | 1987-06-02 | Tankmaster Limited | Tank contents gauge |
| CN1028800C (en) * | 1990-01-06 | 1995-06-07 | 北京市西城新开通用试验厂 | Measuring unit for liquid specific gravity and level |
| US5791187A (en) * | 1995-07-10 | 1998-08-11 | Changmin Co., Ltd. | Level measurement method using measurements of water column pressure therefor |
-
2010
- 2010-11-16 CN CN 201010545241 patent/CN101988844A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4669309A (en) * | 1980-09-19 | 1987-06-02 | Tankmaster Limited | Tank contents gauge |
| US4393705A (en) * | 1981-07-27 | 1983-07-19 | Micro-Plate, Inc. | Specific gravity level gauge and method |
| CN1028800C (en) * | 1990-01-06 | 1995-06-07 | 北京市西城新开通用试验厂 | Measuring unit for liquid specific gravity and level |
| US5791187A (en) * | 1995-07-10 | 1998-08-11 | Changmin Co., Ltd. | Level measurement method using measurements of water column pressure therefor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579937A (en) * | 2018-12-28 | 2019-04-05 | 中国工程物理研究院化工材料研究所 | A kind of warm isostatic pressing machine working cylinder liquid level detection system of realization and detection method |
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Open date: 20110323 |