CN103759788A - Integral liquid level meter of steam drum of boiler and liquid level measuring method - Google Patents
Integral liquid level meter of steam drum of boiler and liquid level measuring method Download PDFInfo
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- CN103759788A CN103759788A CN201410003919.6A CN201410003919A CN103759788A CN 103759788 A CN103759788 A CN 103759788A CN 201410003919 A CN201410003919 A CN 201410003919A CN 103759788 A CN103759788 A CN 103759788A
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- steam drum
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Abstract
The invention relates to an integral liquid level meter of a steam drum of a boiler. The integral liquid level meter comprises a measuring barrel, an upper connecting pipe, a lower connecting pipe, a blowdown valve, a guide wave radar measuring device, a mounting boss and a probe. The measuring barrel is a hollow shell, the upper connecting pipe is mounted on the upper portion of a side surface of the measuring barrel, and the lower connecting pipe is mounted on the lower portion of the side surface of the measuring barrel; the probe deeply extends into the measuring barrel via a through hole in the top of the measuring barrel, and the mounting boss for mounting the guide wave radar measuring device is further arranged on the upper side of the top of the measuring barrel; the blowdown valve is mounted at the bottom of the measuring barrel.
Description
Technical field
The present invention relates to field of metallurgy, particularly a kind of integrated boiler liquid level of steam drum is taken into account level measuring method.
Background technology
The importance of boiler drum water level measurement is on record, boiler drum level is one of important parameter affecting boiler operatiopn safety, for safe operation of the boiler, steam water-level must maintain in normal scope, steam water-level is too high will destroy steam-water separation effect, when serious, can cause water entrained by steam to cause the water entering of steam turbine, when water level is too low, boiler water cycle will be had a strong impact on, and the danger of booster may occur water-cooling wall.
Most of equalizing reservoir pressure difference water gauge or the electric contact point fluviograph of adopting of traditional boiler drum water level measurement device carries out steam drum liquid level measurement, yet equalizing reservoir formula (differential pressure type) measuring method that the technical elements of boiler drum level continuous coverage for a long time adopts exist many cannot improved defect, be mainly reflected in the following aspects: 1, can not implement full working condition measuring, exist " artifical water height " to measure, at boiler, open, stop, emptying, platoon, it is longer that under the unsteady operating conditions such as accident, the differential pressure condition time is stablized in foundation, release time is long or simply can not set up normal differential pressure, need the problems such as manual intervention.2,, under steady working condition condition, owing to being subject to structural limitations, can not thoroughly solve the compensation problem of the systematic measurement error causing because of the exhausted temperature of water side.At boiler, lack, under the accident conditions condition such as full water, systematic measurement error is excessive may have serious consequences.3, complex structure, static seal point is many, and scope of construction item is large and have a Winter protection problem.4, measurement time lag is longer, can not change by immediate reaction boiler water level, and measuring-signal quality of regulation is poor.5, owing to there is condensation tube heat release, use cost is high.These defects are all to cause due to differential pressure type measuring principle and to the unreasonable of systematic sampling structure, cannot improve.Under damage, to safe operation of the boiler, caused very big hidden danger.The interelectrode gap of electric contact point fluviograph can not show that more greatly the variation of steam water-level and electrode hang the reasons such as water and cause water level to show mistake completely.
Summary of the invention
The object of the invention is to boiler drum water level measurement device and can not implement full working condition measuring, have measuring error, need manual intervention, the defects such as use cost height, thus a kind of applied range, boiler-steam dome liquid level emasuring device that measuring accuracy is high are provided.
To achieve these goals, the invention provides a kind of integrated boiler liquid level of steam drum meter, comprising: measure bucket 1, top connecting pipe 2, bottom connecting pipe 3, blowoff valve 4, guided wave radar measurement mechanism 5, installation base 6 and probe 10; Wherein,
The housing that described measurement bucket 1 is inner hollow, the top of its side is provided with described top connecting pipe 2, and described bottom connecting pipe 3 is installed in the bottom of its side; Described probe 10 gos deep in described measurement bucket 1 by measuring the through hole at bucket 1 top, and the described over top of measuring bucket 1 is also provided with for the installation base 6 of guided wave radar measurement mechanism 5 is installed; The described bottom of measuring bucket 1 is provided with blowoff valve 4.
In technique scheme, described top connecting pipe 2 is arranged on the lower edge of blind area, top 8, and blind area, described top 8 is near described one section of region measuring on barrel 1 side, top, and this region is that guided wave radar is installed blind area.
In technique scheme, the width of blind area, described top 8 is 35～45cm.
In technique scheme, described bottom connecting pipe 3 is arranged on the upper edge of blind area 9, bottom, and blind area, described bottom 9 is near described one section of region measuring on barrel 1 side, bottom, near its segment distance for cannot accurately measuring probe 10 bottommosts.
In technique scheme, the width of blind area, described bottom 9 is between 20～30cm.
In technique scheme, the described height of measuring bucket 1 is 120～130cm.
In technique scheme, described top connecting pipe 2 with bottom connecting pipe 3 all with valve, the unlatching by valve or close the conducting between the boiler-steam dome 7 of realizing integrated boiler liquid level of steam drum meter and will measuring or close.
In technique scheme, the medium position of described installation base 6 has a through hole, and the through hole that described guided wave radar measurement mechanism 5 utilizes through hole on installation base 6 and measures bucket 1 top prolongs probe 10 by measuring electromagnetic pulse and is transmitted into and measures in bucket 1.
The boiler-steam dome level measuring method that the present invention also provides the integrated boiler liquid level of steam drum meter based on described to realize, comprising:
The top connecting pipe 2 of integrated boiler liquid level of steam drum meter, bottom connecting pipe 3 difference levels are inserted in described boiler-steam dome 7 to be measured, then opened successively the valve on top connecting pipe 2, bottom connecting pipe 3;
Then start guided wave radar measurement mechanism 5, the electromagnetic pulse of this radar is propagated along probe 10, when running into measured medium surface, part electromagnetic pulse is reflected and forms echo and turn back to guided wave radar measurement mechanism 5 along same paths, calculates the liquid level of boiler-steam dome 7 according to the mistiming between electromagnetic pulse launch time and time of reception.
The invention has the advantages that:
The present invention can be used for severe measuring condition, high temperature high voltage resistant environment, and measuring accuracy is high, adapts to the high ambient temperature requirement of boiler-steam dome position, can overcome false water level impact, guarantees that drum level measurement is accurate, guarantees boiler operatiopn safety.
Accompanying drawing explanation
Fig. 1 is the structural representation of integrated boiler liquid level of steam drum meter of the present invention;
Fig. 2 is the schematic diagram of the installation base in integrated boiler liquid level of steam drum meter of the present invention.
Drawing explanation
1 measures bucket 2 top connecting pipe 3 bottom connecting pipes
4 blowoff valve 5 guided wave radar measurement mechanism 6 installation bases
79 blind areas, bottom, boiler-steam dome 8 blind areas, top
10 probes
Embodiment
Now the invention will be further described by reference to the accompanying drawings.
With reference to figure 1, integrated boiler liquid level of steam drum meter of the present invention comprises: measure bucket 1, top connecting pipe 2, bottom connecting pipe 3, blowoff valve 4, guided wave radar measurement mechanism 5, installation base 6 and probe 10; Wherein, the housing that described measurement bucket 1 is inner hollow, the top of its side has a through hole, and so that described top connecting pipe 2 to be installed, the bottom of its side is also provided with a through hole, so that described bottom connecting pipe 3 to be installed; The described top of measuring bucket 1 has a through hole, and described probe 10 gos deep in described measurement bucket 1 by this through hole, and the over top of measuring bucket 1 is also provided with installation base 6, and described installation base 6 is for installing guided wave radar measurement mechanism 5; The described bottom of measuring bucket 1 is provided with blowoff valve 4.
In the present embodiment, described measurement bucket 1 is that cross section is the hollow housing of rectangle, and in other embodiments, it can be also that cross section is circular barrel-shaped hollow housing, or the cross section hollow housing that is other shapes.In the present embodiment, the described height of measuring bucket 1 is 120～130cm, and in other embodiments, it highly also can do suitable adjustment according to the situation of boiler-steam dome to be measured.
Described top connecting pipe 2 with bottom connecting pipe 3 all with valve, the unlatching by valve or close the conducting between the boiler-steam dome 7 that can realize integrated boiler liquid level of steam drum meter and will measure or close.
Near described one section of region measuring on barrel 1 side, top is blind area, top 8, blind area, described top is that guided wave radar is installed blind area, is the minor increment between the high liquid level (HLL) of liquid level and witness mark (in the application, witness mark instructs the position at ripple radargrammetry device 5 places).In the present embodiment, the width of blind area, described top 8 is 35～45cm, and described top connecting pipe 2 is arranged on the lower edge that is positioned at blind area, described top 8 while measuring on bucket 1 side.
Near described one section of region measuring on barrel 1 side, bottom is blind area, bottom 9, and blind area, described bottom 9 is near cannot accurately measure probe 10 bottommosts segment distances, and in the present embodiment, the width of blind area, described bottom 9 is between 20～30cm.Described bottom connecting pipe 3 is arranged on the upper edge that is positioned at blind area, described bottom 9 while measuring on bucket 1 side.
With reference to figure 2, the medium position of described installation base 6 has a through hole, and the through hole that described guided wave radar measurement mechanism 5 utilizes through hole on installation base 6 and measures bucket 1 top prolongs probe 10 by measuring electromagnetic pulse and is transmitted into and measures in bucket 1.
With reference to figure 1, integrated boiler liquid level of steam drum meter of the present invention, when work, inserts top connecting pipe 2, bottom connecting pipe 3 difference levels in described boiler-steam dome 7 to be measured, then opens successively the valve on top connecting pipe 2, bottom connecting pipe 3; Then start guided wave radar measurement mechanism 5, the electromagnetic pulse of this radar is propagated along probe 10 with the light velocity, when running into measured medium surface, part electromagnetic pulse is reflected and forms echo and turn back to guided wave radar measurement mechanism 5 along same paths, because guided wave radar measurement mechanism 5 is directly proportional with the pulse travel-time betwixt to the distance on measured medium surface, therefore according to the mistiming between electromagnetic pulse launch time and time of reception, can calculate the liquid level of boiler-steam dome 7.
Integrated boiler liquid level of steam drum meter of the present invention has the accurately continuous observing and controlling function of liquid level under full working condition, and measurement is not subject to the impact of media variations, temperature variation, inert gas and steam, dust, foam etc., overcome false water level impact, more than its measuring accuracy reaches per mille, long-time stability are very good,, without any drift, be almost the boiler liquid level meter of a full operating mode, high precision, high reliability.The present invention has that cost is low, high temperature resistant, high pressure resistant, measuring accuracy is high, adjusts the advantages such as easy for installation, is applicable to explosion hazard area.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although the present invention is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is modified or is equal to replacement, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (9)
1. an integrated boiler liquid level of steam drum meter, is characterized in that, comprising: measure bucket (1), top connecting pipe (2), bottom connecting pipe (3), blowoff valve (4), guided wave radar measurement mechanism (5), installation base (6) and probe (10); Wherein,
The housing that described measurement bucket (1) is inner hollow, the top of its side is provided with described top connecting pipe (2), and described bottom connecting pipe (3) is installed in the bottom of its side; Described probe (10) gos deep in described measurement bucket (1) by measuring the through hole at bucket (1) top, and the described over top of measuring bucket (1) is also provided with the installation base (6) for guided wave radar measurement mechanism (5) are installed; The described bottom of measuring bucket (1) is provided with blowoff valve (4).
2. integrated boiler liquid level of steam drum meter according to claim 1, it is characterized in that, described top connecting pipe (2) is arranged on the lower edge of blind area, top (8), blind area, described top (8) is near described one section of region measuring on barrel (1) side, top, and this region is that guided wave radar is installed blind area.
3. integrated boiler liquid level of steam drum meter according to claim 2, is characterized in that, the width of blind area, described top (8) is 35～45cm.
4. integrated boiler liquid level of steam drum meter according to claim 1, it is characterized in that, described bottom connecting pipe (3) is arranged on the upper edge of blind area, bottom (9), blind area, described bottom (9) is near described one section of region measuring on barrel (1) side, bottom, and it is near cannot accurately measure probe (10) bottommost a segment distance.
5. integrated boiler liquid level of steam drum meter according to claim 4, is characterized in that, the width of blind area, described bottom (9) is between 20～30cm.
6. integrated boiler liquid level of steam drum meter according to claim 1, is characterized in that, the described height of measuring bucket (1) is 120～130cm.
7. integrated boiler liquid level of steam drum meter according to claim 1, it is characterized in that, described top connecting pipe (2) and bottom connecting pipe (3) be all with valve, the unlatching by valve or close the conducting between the boiler-steam dome (7) of realizing integrated boiler liquid level of steam drum meter and will measuring or close.
8. integrated boiler liquid level of steam drum meter according to claim 1, it is characterized in that, the medium position of described installation base (6) has a through hole, and the through hole that described guided wave radar measurement mechanism (5) utilizes through hole on installation base (6) and measures bucket (1) top prolongs probe (10) by measuring electromagnetic pulse and is transmitted into and measures in bucket (1).
9. the boiler-steam dome level measuring method that the integrated boiler liquid level of steam drum meter based on one of claim 1-8 Suo Shu is realized, comprising:
The top connecting pipe (2) of integrated boiler liquid level of steam drum meter, bottom connecting pipe (3) difference level are inserted in described boiler-steam dome to be measured (7), then opened successively the valve on top connecting pipe (2), bottom connecting pipe (3);
Then start guided wave radar measurement mechanism (5), the electromagnetic pulse of this radar is propagated along probe (10), when running into measured medium surface, part electromagnetic pulse is reflected and forms echo and turn back to guided wave radar measurement mechanism (5) along same paths, calculates the liquid level of boiler-steam dome (7) according to the mistiming between electromagnetic pulse launch time and time of reception.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410003919.6A CN103759788A (en) | 2014-01-03 | 2014-01-03 | Integral liquid level meter of steam drum of boiler and liquid level measuring method |
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| CN201410003919.6A CN103759788A (en) | 2014-01-03 | 2014-01-03 | Integral liquid level meter of steam drum of boiler and liquid level measuring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104848916A (en) * | 2015-03-23 | 2015-08-19 | 浙江海洋学院 | Drum water level detection device based on optical principle |
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| CN101408450A (en) * | 2007-10-10 | 2009-04-15 | 罗明 | Full operating condition continuous measuring boiler drum liquid-level meter and liquid level computation method thereof |
| CN102564534A (en) * | 2012-01-08 | 2012-07-11 | 秦皇岛华电测控设备有限公司 | Magnetic liquidometer for water level of steam drum |
| CN203705014U (en) * | 2014-01-03 | 2014-07-09 | 莱芜钢铁集团有限公司 | All-in-one boiler drum liquidometer |
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2014
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Patent Citations (4)
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| CN2610225Y (en) * | 2003-07-28 | 2004-04-07 | 刘吉川 | Steam pocket water-level double-compartment container |
| CN101408450A (en) * | 2007-10-10 | 2009-04-15 | 罗明 | Full operating condition continuous measuring boiler drum liquid-level meter and liquid level computation method thereof |
| CN102564534A (en) * | 2012-01-08 | 2012-07-11 | 秦皇岛华电测控设备有限公司 | Magnetic liquidometer for water level of steam drum |
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| CN104848916A (en) * | 2015-03-23 | 2015-08-19 | 浙江海洋学院 | Drum water level detection device based on optical principle |
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Application publication date: 20140430 |