CN2386423Y - Capacitive boiler water level sensor - Google Patents
Capacitive boiler water level sensor Download PDFInfo
- Publication number
- CN2386423Y CN2386423Y CN 99219073 CN99219073U CN2386423Y CN 2386423 Y CN2386423 Y CN 2386423Y CN 99219073 CN99219073 CN 99219073 CN 99219073 U CN99219073 U CN 99219073U CN 2386423 Y CN2386423 Y CN 2386423Y
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- CN
- China
- Prior art keywords
- variodenser
- metal sleeve
- utility
- model
- level sensor
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- Expired - Fee Related
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model relates to a capacitive boiler water level sensor which comprises a variodenser, a transducer module and leading wire, wherein, the variodenser changes following the change of the height of liquid levels. The utility model is characterized in that the variodenser is provided with an alloy rod electrode which is inserted into a ceramic blind pipe, the outer end of the alloy rod electrode is connected with the transducer module, and the other electrode of the variodenser is an eccentric metal sleeve pipe which is fixed on the periphery of the ceramic blind pipe by a sealing cover; the upper end of the sealing cover is connected with a casing of the transducer; the upper part of the metal sleeve pipe is provided with a gas phase pipe interface, the lower part of the metal sleeve is provided with a liquid phase pipe interface, and the bottom of the metal sleeve pipe is provided with a dirt discharging opening. The utility model has the advantages of high temperature resistance, no scales, simple structure, high measuring precision and long service life, and is suitable for measuring water levels on boilers.
Description
The utility model relates to a kind of condenser type water level sensor for boiler.
China Patent No. is 97221569.7 " condenser type level sensor ", it is with capacitance probe, sensor body and goes between three ones and be enclosed in the integral body that a schmidt door circuit, a feedback resistance R and the high frequency oscillator that capacitor C X forms are adopted in the core of probe capacitance measurement circuit.This condenser type level sensor can be immersed in the fluid to be measured easily, has easy for installationly, safe in utilization, is not subjected to the influence of viscous mass and incrustation, the service precision height, and the life-span is long.But its not enough place is to be not suitable for using on the boiler of high temperature.
The purpose of this utility model is that design is a kind of simple in structure, the high long service life of precision, the condenser type water level sensor for boiler that is suitable for using on the boiler.
Task of the present utility model is finished as follows, it includes variodenser and a transmitter module and lead-in wire that capacitance change is converted to the output of normalized current signal that just changes with liquid level, it is characterized in that: variodenser has an alloy bar electrode that is inserted in the ceramic blind pipe, alloy bar electrode outer end and transmitter module connect, another of variodenser be a metal sleeve that is fixed on ceramic blind pipe periphery with one heart with gland bonnet very, the gland bonnet upper end is connected with the transmitter shell, on the top of metal sleeve the gas phase interface tube is arranged, the liquid-phase tube interface is arranged at the bottom, and sewage draining exit is arranged at the bottom.
This condenser type water level sensor for boiler, because an electrode of variodenser is airtight with ceramic blind pipe, thus not only high temperature resistant, and can scaling, be particularly suitable for being used in and measure water level on the boiler.It is simple in structure, measuring accuracy height, long service life.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the electrical schematic diagram of transmitter module of the present utility model.
The utility model selects for use ceramic blind pipe 3 that alloy bar 4 usefulness gland bonnets 6 are contained in an electrode of making variodenser in the metal sleeve 2 with one heart, its metal sleeve 2 another utmost points own as variodenser, gland bonnet 6 upper ends are connected with transmitter shell 7, on the top of metal sleeve 2 gas phase interface tube 5 is arranged, liquid-phase tube interface 1 is arranged at the bottom, and sewage draining exit 10 is arranged at the bottom.It is simple in structure and high temperature resistant, can also reduce the distributed capacitance between utmost point pipe.Gland bonnet 6 is connected between metal sleeve 2 and the transmitter shell 7, connects transmitter module 8 and instrument power by lead-in wire 9.
Transmitter module circuit theory of the present utility model as shown in Figure 2.Sensor capacitance, be two electrode metal sleeve pipes 2 of transmitter and alloy bar 4, lead-in wire 9 connects secondary instrument, and logical 24V direct supply, transmitter module 8 is divided into four parts, i.e. constant voltage source part, time base circuit, ring diode bridge and amplifier, power amplifier part.The constant voltage source part is by voltage-reg-ulator tube T1, temperature compensation pipe T2 and stabilivolt T3 and resistance R 1, R2, R3, R4 constitutes, time base circuit is by time-base integrated circuit U1 and resistance R 5, R6, R7, capacitor C 1, C2 constitutes, the ring diode bridge is by bridge rectifier diode Q, capacitor C 3, other puts capacitor C a balance, inductance L 1 and L2 constitute, the ring diode bridge provides stable voltage square wave signal, capacitor C X by variodenser changes the output voltage variation that makes the ring diode bridge, and be directly proportional with it, output voltage changes through the discharge circuit processing and amplifying, promotes power tube T4 and produces the normalized current that is directly proportional and changes with capacitor C X.Discharge circuit is made of amplifier integrated circuit U2 and resistance R 9 one R13, power tube T4.Thisly convert the changes in capacitance amount to normalized current signal output, the height of changes in capacitance amount and liquid level is varied to direct ratio, so can reflect boiler liquid level exactly.
Claims (1)
1, condenser type water level sensor for boiler, it includes variodenser and a transmitter module and lead-in wire that capacitance change is converted to the output of normalized current signal that just changes with liquid level, it is characterized in that variodenser has an alloy bar electrode that is inserted in the ceramic blind pipe, alloy bar electrode outer end and transmitter module connect, another of variodenser be a metal sleeve that is fixed on ceramic blind pipe periphery with one heart with gland bonnet very, the gland bonnet upper end is connected with the transmitter shell, on the top of metal sleeve the gas phase interface tube is arranged, the liquid-phase tube interface is arranged at the bottom, and sewage draining exit is arranged at the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99219073 CN2386423Y (en) | 1999-08-13 | 1999-08-13 | Capacitive boiler water level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99219073 CN2386423Y (en) | 1999-08-13 | 1999-08-13 | Capacitive boiler water level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2386423Y true CN2386423Y (en) | 2000-07-05 |
Family
ID=34010095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99219073 Expired - Fee Related CN2386423Y (en) | 1999-08-13 | 1999-08-13 | Capacitive boiler water level sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2386423Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100420924C (en) * | 2004-05-18 | 2008-09-24 | 日本特殊陶业株式会社 | Capacitance type liquid status sensor |
| CN100427898C (en) * | 2004-10-29 | 2008-10-22 | 日本特殊陶业株式会社 | Liquid state detecting sensor |
| CN102589646A (en) * | 2012-02-10 | 2012-07-18 | 梁支信 | U-shaped capacitive liquid level meter |
| CN102818605A (en) * | 2012-02-25 | 2012-12-12 | 威海海和科技有限责任公司 | High-temperature and high-voltage resistance subsection capacitive level transmitter |
| CN105136243A (en) * | 2015-05-08 | 2015-12-09 | 上海天行控制科技有限公司 | Great-capacitance capacitive liquid level sensor suitable for dynamic environment |
| CN105222866A (en) * | 2015-09-14 | 2016-01-06 | 新乡市恒冠仪表有限公司 | A kind of condenser type intelligent boiler liquid level of steam drum meter |
-
1999
- 1999-08-13 CN CN 99219073 patent/CN2386423Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100420924C (en) * | 2004-05-18 | 2008-09-24 | 日本特殊陶业株式会社 | Capacitance type liquid status sensor |
| CN100427898C (en) * | 2004-10-29 | 2008-10-22 | 日本特殊陶业株式会社 | Liquid state detecting sensor |
| CN102589646A (en) * | 2012-02-10 | 2012-07-18 | 梁支信 | U-shaped capacitive liquid level meter |
| CN102589646B (en) * | 2012-02-10 | 2013-06-19 | 南宁测控自动化科技有限公司 | U-shaped capacitive liquid level meter |
| CN102818605A (en) * | 2012-02-25 | 2012-12-12 | 威海海和科技有限责任公司 | High-temperature and high-voltage resistance subsection capacitive level transmitter |
| CN105136243A (en) * | 2015-05-08 | 2015-12-09 | 上海天行控制科技有限公司 | Great-capacitance capacitive liquid level sensor suitable for dynamic environment |
| CN105136243B (en) * | 2015-05-08 | 2018-08-24 | 上海天行控制科技有限公司 | Bulky capacitor capacitance level transducer suitable for dynamic environment |
| CN105222866A (en) * | 2015-09-14 | 2016-01-06 | 新乡市恒冠仪表有限公司 | A kind of condenser type intelligent boiler liquid level of steam drum meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |