CN1318825C - Electric connection point water level meter of three end type water level meter - Google Patents
Electric connection point water level meter of three end type water level meter Download PDFInfo
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- CN1318825C CN1318825C CNB2004100109829A CN200410010982A CN1318825C CN 1318825 C CN1318825 C CN 1318825C CN B2004100109829 A CNB2004100109829 A CN B2004100109829A CN 200410010982 A CN200410010982 A CN 200410010982A CN 1318825 C CN1318825 C CN 1318825C
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- water level
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Abstract
The present invention belongs to the measuring technical field, and relates to a three-end electric contact level gauge with a water level electrode, which is composed of a measuring cylinder, an electrode, a secondary meter and a temperature sensor, wherein the electrode comprises a measuring end, a compensation end and a common end. The secondary meter comprises an optical isolation module, a microprocessor, a bicolor light beam display, a bicolor digital display, an alarm, an output interface with 4 to 20 mA, an arithmetic device, a compensation source, an alternating current source and a direct current source. The electrode is fixed on the measuring cylinder and is connected with the secondary meter. The microprocessor of the secondary meter outputs the processed data to the bicolor light beam display, the bicolor digital display, the alarm and the output interface with 4 to 20 mA. The arithmetic device is connected with the temperature sensor which is respectively fixed on the measuring cylinder and a steam drum. The present invention solves and overcomes the problems and the defects that the existing two-end type electric contact level gage easily generates false display and measuring errors, the electrode is easy to pollute and scale, etc.
Description
Technical field
The invention belongs to field of measuring technique, relate to the electric contact point fluviograph that is used to measure water level, specifically a kind of trifocal level electrode electric contact point fluviograph.
Technical background
Utilizing electric contact point fluviograph to measure water level, is present most widely used a kind of level measuring means, especially on the station boiler drum, use and just seem even more important, yet the present electric contact point fluviograph of using, used electrode all is the two ends formula, has only measuring junction and common port.Above-mentioned secondary instrument includes light every module, and microprocessor shows and alarm direct supply etc.The electric contact point fluviograph of using is to utilize electrode different with vapour locking at the water resistance that the vapour side is presented with electrode in the water side at present, realizes the differentiation to water and this two states of vapour.When the contaminated and fouling of electrode, all can have a strong impact on and change the insulation resistance of electrode self, and insulation resistance and water resistance and vapour locking belong to a kind of electric weight.In case, occur false the demonstration and problems such as measurement error easily so the electrode fouling of the electric contact point fluviograph of using at present and being polluted will inevitably cause measuring error.
Summary of the invention
Be afraid of to pollute the fearness fouling in order to overcome existing two ends formula electric contact point fluviograph electrode, and be prone to and false show and measure defectives such as error, the present invention adopts the trifocal level electrode that disposes the compensation end, and purpose provides a kind of trifocal level electrode electric contact point fluviograph.
The present invention utilizes the electric contact point fluviograph electrode different with the level that presents separately in the vapour side in the water side, realizes the differentiation to vapour, this two states of water.The water side is a low level, and the vapour side is a high level, and the height of level and electrode self insulation resistance is irrelevant.
The present invention is made up of measurement tube, electrode, temperature sensor, secondary instrument four parts.Described secondary instrument comprises light every module, and microprocessor shows and alarm arithmetical unit, power supply.Described electrode includes measuring junction, common port, compensation end.
The tube of measuring of the present invention is the linker structure with container such as the drum of adorning water.
Electrode is fixed on to be measured on the tube, and the compensation end of electrode is between measuring junction and common port.Electrode is a kind of senser element, the water level of measuring in the tube can be converted to level signal.The water side is a low level, and the vapour side is a high level.
During actual the use, tested water is inequality sometimes with the temperature of measuring the water in the tube.This is because temperature difference causes the vapour density difference of water, thereby makes the water level of measuring in the tube can not definitely represent tested water level.In order to revise tested water level and the difference of measuring water level in the tube, the present invention extracts tested water temperature respectively and measures the tube water temperature by temperature sensor, behind the internalarithmetic in secondary instrument, provides the optimum value of water level correction.And then utilizing this modified value, the water level value addition in the measurement tube that provides with microprocessor just obtains the water level in the drum.Temperature sensor is installed in respectively to be measured on tube and the drum.
Light is arranged every module, microprocessor, demonstration and alarm, arithmetical unit, power supply in the secondary instrument of the present invention, power supply comprises compensation source, alternating current source and DC source.Be installed in the temperature sensor of measuring on tube and the drum and be connected with arithmetical unit, the temperature signal of temperature sensor output is exported to demonstration and alarm after handling by arithmetical unit.The DC source of described power supply is the power supply of microprocessor, demonstration and alarm, arithmetical unit, and alternating current source is the power supply of secondary instrument light every module, and the compensation source is the power supply of electrode compensation end.
Demonstration and alarm comprise display and alarm, and display can be double-colored bar graphic display and dual-colour digital code display, and alarm can be common audible-visual annunciator.
The measuring junction of electrode is connected every module with light in the secondary instrument, and common port is connected on the alternating current source.
The present invention be utilize electrode water survey and vapour to survey the level that presents different, realization is to the differentiation of water and this two states of vapour, thereby provides water level value.Because the degree of the height of level and electrode self-pollution and fouling is without any relation, the influence of therefore not contaminated and fouling factor also just need not blowdown, more can not cause falsely to show and measure error.Display of the present invention adopts double-colored demonstration, not only shows and measures water level in the tube, can also show the water level of drum; Temperature sensor and interlock circuit can be revised the water level deviation, improve its accuracy; Audible-visual annunciator can output alarm signal.Any medium of this instrument measurement need not to carry out water resistance and sets, and also just need not to carry out blowdown operation.
Description of drawings
Fig. 1 is a structured flowchart of the present invention, also is the specification digest accompanying drawing.1 for measuring tube, and 2 electrodes, 3 light are every module, 4 microprocessors, 5 double-colored bar graphic display, 6 dual-colour digital code displays, 7 alarms, 8 is the 4-20mA output interface, 9 arithmetical unit, 10 DC source, 11 alternating current sources, 12 compensation sources, 13 temperature sensors, 14 flanges, 15 measuring junctions, 16 compensation ends, 17 common ports, 18 drums, 19 connecting pipes.
Embodiment
Connecting pipe up and down 19 on the drum 18 is connected with measurement tube 1 by flange 14.The measuring junction 15 of electrode 2 is installed in to be measured in the tube 1, and common port 17 is fixed on the housing of measuring tube 1.Measuring junction 15 is shared the same light and is connected every module 3, and compensation end 16 is connected on the compensation source 12, and common port 17 is connected on the alternating current source 11.Alternating current source 11 is connected every module 3 with light.Light is connected on the input end of microprocessor 4 every module 3, and the output terminal of microprocessor 4 is connected with double-colored bar graphic display 5, dual-colour digital code display 6, alarm 7 respectively.Alarm 7 can be distinguished sound and light alarm when water level surpasses early warning value in measuring tube 1 and drum 18, can export to other device to warning message again.Temperature sensor 13 is separately fixed on measurement tube 1 and the drum 18, and connects with arithmetical unit 9, records the temperature of measuring water in a temperature of 1 interior water and the drum 18 respectively.The output terminal of arithmetical unit 9 connects with double-colored bar graphic display 5, dual-colour digital code display 6, alarm 7.Double-colored bar graphic display 5 and dual-colour digital code display 6 are double-colored, and red for measuring the water level in the tube 1, blueness is the water level in the drum 18.Double-colored bar graphic display 5, dual-colour digital code display 6 had both shown the water level value of measuring in the tube 1, showed the water level value in the drum 18 again.
For water level signal that the present invention is recorded further with processing such as computing machines, secondary instrument also comprises the 4-20mA output interface.At the output terminal of secondary instrument microprocessor 4 a 4-20mA output interface is installed, the analog quantity of output and computer system etc. are docked.
Claims (5)
1, a kind of trifocal level electrode electric contact point fluviograph includes and measures tube (1), electrode (2), secondary instrument, it is characterized in that also comprising temperature sensor (13), and temperature sensor (13) is installed in respectively to be measured on tube (1) and the drum (18); Electrode (2) includes measuring junction (15), compensation end (16), common port (17), is separately fixed at and measures on the tube (1), and compensation end (16) is between measuring junction (15) and common port (17); Secondary instrument also comprises arithmetical unit (9), and temperature sensor (13) is connected on the input end of arithmetical unit (9), and the output terminal of arithmetical unit (9) is connected with alarm with showing; Used power supply comprises DC source (10), alternating current source (11), compensation source (12), DC source (10) is the power supply of demonstration and alarm, arithmetical unit (9), microprocessor (4), compensation source (12) is the power supply of compensation end (16), and AC power (11) is the power supply of light every module (3).
2, trifocal level electrode electric contact point fluviograph according to claim 1 is characterized in that the connecting pipe of measuring on the tube (1) (19) is connected on the upper and lower connecting pipe (19) of drum (18) by flange (14).
3, trifocal level electrode electric contact point fluviograph according to claim 2, it is characterized in that demonstration and alarm comprise the double-colored bar graphic display (5) that can show measurement tube (1) interior water level and the interior water level of drum (18), can show the dual-colour digital code display (6) of measuring tube (1) interior water level and the interior water level of drum (18), have sound and light alarm that the alarm (7) of the output of reporting to the police is arranged simultaneously.
4, trifocal level electrode electric contact point fluviograph according to claim 3 is characterized in that the red display in double-colored bar graphic display (5) and the dual-colour digital code display (6) is the water level in the measurement tube (1), and blueness is shown as the water level in the drum (18).
5, according to any described trifocal level electrode electric contact point fluviograph in the claim 1,2,3, the output terminal that it is characterized in that microprocessor (4) connect one can dock with computer system can export analog quantity 4-20mA output interface (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100109829A CN1318825C (en) | 2004-07-09 | 2004-07-09 | Electric connection point water level meter of three end type water level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100109829A CN1318825C (en) | 2004-07-09 | 2004-07-09 | Electric connection point water level meter of three end type water level meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1648617A CN1648617A (en) | 2005-08-03 |
| CN1318825C true CN1318825C (en) | 2007-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100109829A Expired - Fee Related CN1318825C (en) | 2004-07-09 | 2004-07-09 | Electric connection point water level meter of three end type water level meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1318825C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460833C (en) * | 2006-11-15 | 2009-02-11 | 高维信 | Single solid bowl type electrode measurement tube in high precision for water level of steam tank, and method for determining geometrical size |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86201253U (en) * | 1986-03-06 | 1986-11-12 | 东北电力试验研究院 | Water level-checking and measuring device for hot sleeve pressure container-type boiler |
| US4795967A (en) * | 1986-09-17 | 1989-01-03 | A V L Gesellschaft Fur Verbrennungskraftmaschinen Und Messtechnik M.B.H. Prof. Dr.Dr.H.C. Hans List | Level measuring device for electrically non-conductive liquids |
| CN2135771Y (en) * | 1992-09-08 | 1993-06-09 | 黄晓峰 | Boiler water level monitoring controller |
| CN2708267Y (en) * | 2004-07-09 | 2005-07-06 | 刘立峰 | Three-end water level electrode electric contact level gauge |
-
2004
- 2004-07-09 CN CNB2004100109829A patent/CN1318825C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86201253U (en) * | 1986-03-06 | 1986-11-12 | 东北电力试验研究院 | Water level-checking and measuring device for hot sleeve pressure container-type boiler |
| US4795967A (en) * | 1986-09-17 | 1989-01-03 | A V L Gesellschaft Fur Verbrennungskraftmaschinen Und Messtechnik M.B.H. Prof. Dr.Dr.H.C. Hans List | Level measuring device for electrically non-conductive liquids |
| CN2135771Y (en) * | 1992-09-08 | 1993-06-09 | 黄晓峰 | Boiler water level monitoring controller |
| CN2708267Y (en) * | 2004-07-09 | 2005-07-06 | 刘立峰 | Three-end water level electrode electric contact level gauge |
Non-Patent Citations (3)
| Title |
|---|
| 汽包水位一次测量补偿技术 胡珊，黑龙江工程学院学报(自然科学版)，第18卷第1期 2004 * |
| 补偿式电接点汽包水位测量装置的研制 毛武英等，华北电力技术，第5期 1997 * |
| 补偿式电接点汽包水位测量装置的研制 毛武英等，华北电力技术，第5期 1997;汽包水位一次测量补偿技术 胡珊，黑龙江工程学院学报(自然科学版)，第18卷第1期 2004 * |
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| Publication number | Publication date |
|---|---|
| CN1648617A (en) | 2005-08-03 |
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