CN202119605U - Leakage liquid sensor - Google Patents
Leakage liquid sensor Download PDFInfo
- Publication number
- CN202119605U CN202119605U CN2011201709905U CN201120170990U CN202119605U CN 202119605 U CN202119605 U CN 202119605U CN 2011201709905 U CN2011201709905 U CN 2011201709905U CN 201120170990 U CN201120170990 U CN 201120170990U CN 202119605 U CN202119605 U CN 202119605U
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- Prior art keywords
- temperature sensor
- sensor
- heating element
- leakage
- temperature
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Abstract
The utility model relates to a leakage liquid sensor, comprising a housing, a first temperature sensor, a heating element, a second temperature sensor and a wiring port, wherein the housing covers the first temperature sensor, the heating element and the second temperature sensor, the first temperature sensor, the heating element and the second temperature sensor are arranged at the lower portion in the housing, the first temperature sensor, the heating element and the second temperature sensor are respectively connected with the wiring port via connecting wires, and the wiring port is arranged above the housing. Compared with the prior art, the leakage liquid sensor is wide in application scope, safe, reliable, stable, etc.
Description
Technical field
The utility model relates to a kind of sensor, especially relates to a kind of leakage sensor.
Background technology
At present, all there is the problem of leak of liquid in a lot of occasions,, not only can causes waste in case leak, and under certain situation, like computer room, precision optical machinery, chemical industry instrument etc., leakage will cause accident.
The most liquid leak sensor all is to utilize the electric conductivity of liquid to detect leakage at present.The sensor that detects is formed by electrode and with the insulator of its separation.In case liquid leaks, with the short circuit of the electrode that causes sensor, interelectrode resistance value will descend, and when sensor controller detects out this variation, promptly give the alarm.
The most fatal shortcoming of electrode detection is, if when detecting the lower liquid of potential of hydrogen such as pure water, 2 interelectrode change in impedance value of electrode of sensor are little; System sensitivity is low; Be not easy to report to the police, if improve the sensitivity of instrument, easily by some interference and false alarm.Simultaneously detection faces is corroded with after soda acid liquid contact easily, is not easy to cleaning.
Also have at present optical principle to come tracer liquid to leak, shortcoming is that the characteristic of the leakage liquid as a result of detection is correlated with, and the leakage liquid color is different, and the reflectivity of light is different, and the result of detection is also different.In addition, the liquid of leakage also has very big influence if any the characteristic of evaporation to testing result.
External also have utilize 1 temperature sensor to detect leakage, principle is to let temperature sensor be operated in the spontaneous heating state always, if liquid leaks; When the temperature sensor, the sensor back temperature that is cooled reduces, and detects according to the temperature of detected temperatures sensor whether leakage has taken place; The shortcoming of this method is that stability is bad; Sensor is bigger to the influence of ambient temperature, if ambient temperature raises or reduces, to the very big again influence of last result.
The utility model content
The purpose of the utility model is exactly the leakage sensor that a kind of applied widely, safe and reliable, good stability is provided in order to overcome the defective that above-mentioned prior art exists.
The purpose of the utility model can realize through following technical scheme: a kind of leakage sensor; It is characterized in that; This leakage sensor comprises shell, first temperature sensor, heating element, second temperature sensor, connection jaws; Described shell wraps up first temperature sensor, heating element, second temperature sensor; Described first temperature sensor, heating element, second temperature sensor all are located at the enclosure below of leakage sensor, are connected with connection jaws through connecting line separately, and described connection jaws is located at the shell top.
The shell of described leakage sensor is provided with fixed orifice.
Described first temperature sensor is located at the heating element top, and described second temperature sensor is located at the heating element below.
The surface of described first temperature sensor, heating element and second temperature sensor is provided with corrosion-inhibiting coating.
Described corrosion-inhibiting coating is epoxy coating or fluorine-containing coat.
Described first temperature sensor, second temperature sensor are RTD PT1000.
Described heating element is a resistance.
Compared with prior art, the utlity model has following advantage:
1, usable range is wide: characteristics such as the potential of hydrogen of liquid are little to the sensitivity influence of leakage detector, therefore, are applicable to various liquid;
2, safe and reliable: the leakage sensor coating is epoxy coating or fluorine-containing coat, and is corrosion-resistant, and the life-span is long, is convenient to simultaneously clean;
3, good stability: leakage sensor has 2 temperature sensors and heating element, and the temperature during duty is higher than environment temperature far away, and therefore the result of inspection receives the influence of environment temperature little, good stability.
Description of drawings
Fig. 1 is a leakage sensor plan structure synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
Embodiment
As shown in Figure 1, a kind of leakage sensor, this leakage sensor comprise shell 6, first temperature sensor 3, heating element 4, second temperature sensor 5, connection jaws 2, fixed orifice 1.Wherein fixed orifice 1 can be fixed on place to be detected with leakage sensor; Connection jaws 2 mainly is made up of 12V power supply wiring mouth, the first and second temperature sensor signal line connection jaws; The 12V power supply provides power supply for heating element 4 through connection jaws 2, and two groups of signal wire connection jaws are passed to main frame with the signal of first temperature sensor 3, second temperature sensor 5; The surface of first temperature sensor 3, heating element 4 and second temperature sensor 5 scribbles epoxy coating, waterproof and dustproof, corrosion-resistant, be convenient to clean.Epoxy coating is also replaceable to be fluorine-containing coat.First temperature sensor 3 is positioned at the top of heater element 4, and second temperature sensor 5 is positioned at the below of heater element 4.Heating element 4 is selected a common resistance for use; Through at ordinary times temperature after the power supply power supply heating always about 70 ℃; First temperature sensor 3, second temperature sensor 5 adopt RTD PT1000; The resistance value of its temperature and sensor is relevant, and system just can detect whether leak of liquid has taken place as long as detect the resistance value of two temperature sensors.When not leaking, because heater element 4 is in from heated condition always, when environment temperature was high, the temperature of two temperature sensors was simultaneously higher; When environment temperature was low, the temperature of two temperature sensors was simultaneously on the low side, and therefore the temperature difference of two temperature sensors keeps comparing less.When leak of liquid takes place when; The temperature of second temperature sensor 5 descends; And first temperature sensor, 3 temperature remain unchanged, and it is big that the temperature difference of two temperature sensors becomes, and system is through detecting the resistance value of first temperature sensor 3 and second temperature sensor 5; Judge whether the temperature difference becomes greatly, thus the tracer liquid leak condition.Simultaneously; First temperature sensor 3, heating element 4, second temperature sensor 5 are separated with the All other routes plate; Can play heat insulation effect like this, because the temperature of leakage sensor duty of the present invention is to be higher than environment temperature always, so testing result receives factor affecting such as environment temperature and humidity little; And if liquid has slight leakage, this sensor can also play the effect of heating, drying.
Claims (7)
1. leakage sensor; It is characterized in that; This leakage sensor comprises shell, first temperature sensor, heating element, second temperature sensor, connection jaws, and described shell wraps up first temperature sensor, heating element, second temperature sensor, and described first temperature sensor, heating element, second temperature sensor all are located at the enclosure below of leakage sensor; Be connected with connection jaws through connecting line separately, described connection jaws is located at the shell top.
2. a kind of leakage sensor according to claim 1 is characterized in that the shell of described leakage sensor is provided with fixed orifice.
3. a kind of leakage sensor according to claim 1 is characterized in that, described first temperature sensor is located at the heating element top, and described second temperature sensor is located at the heating element below.
4. a kind of leakage sensor according to claim 1 is characterized in that, the surface of described first temperature sensor, heating element and second temperature sensor is provided with corrosion-inhibiting coating.
5. a kind of leakage sensor according to claim 4 is characterized in that, described corrosion-inhibiting coating is epoxy coating or fluorine-containing coat.
6. a kind of leakage sensor according to claim 1 is characterized in that, described first temperature sensor, second temperature sensor are RTD PT1000.
7. a kind of leakage sensor according to claim 1 is characterized in that, described heating element is a resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201709905U CN202119605U (en) | 2011-05-25 | 2011-05-25 | Leakage liquid sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201709905U CN202119605U (en) | 2011-05-25 | 2011-05-25 | Leakage liquid sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202119605U true CN202119605U (en) | 2012-01-18 |
Family
ID=45460661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201709905U Expired - Fee Related CN202119605U (en) | 2011-05-25 | 2011-05-25 | Leakage liquid sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202119605U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277320A (en) * | 2014-06-17 | 2016-01-27 | 艾默生网络能源有限公司 | Liquid leakage detection sensor and system |
| CN106032933A (en) * | 2015-03-09 | 2016-10-19 | 马发财 | A temperature control heating bag for liquid bags |
| CN113551846A (en) * | 2021-08-27 | 2021-10-26 | 中国商用飞机有限责任公司 | Device for detecting leakage of water tank and aircraft comprising same |
-
2011
- 2011-05-25 CN CN2011201709905U patent/CN202119605U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277320A (en) * | 2014-06-17 | 2016-01-27 | 艾默生网络能源有限公司 | Liquid leakage detection sensor and system |
| CN105277320B (en) * | 2014-06-17 | 2017-11-21 | 艾默生网络能源有限公司 | A kind of leakage detection sensor and system |
| CN106032933A (en) * | 2015-03-09 | 2016-10-19 | 马发财 | A temperature control heating bag for liquid bags |
| CN113551846A (en) * | 2021-08-27 | 2021-10-26 | 中国商用飞机有限责任公司 | Device for detecting leakage of water tank and aircraft comprising same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20150525 |
|
| EXPY | Termination of patent right or utility model |