CN207923369U - The differential humidity leak-detecting device of double water innercooling electric generator - Google Patents
The differential humidity leak-detecting device of double water innercooling electric generator Download PDFInfo
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- CN207923369U CN207923369U CN201820069161.XU CN201820069161U CN207923369U CN 207923369 U CN207923369 U CN 207923369U CN 201820069161 U CN201820069161 U CN 201820069161U CN 207923369 U CN207923369 U CN 207923369U
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Abstract
The utility model provides the differential humidity leak-detecting device of double water innercooling electric generator, including：Input module, aerial temperature and humidity measured value and the outer aerial temperature and humidity measured value of machine in the machine for obtaining double water innercooling electric generator；Processing module connects input module, for according to preset algorithm by humidity measurements outside humidity measurements in the machine under different temperatures measured value and machine be scaled it is synthermal under machine in absolute humidity values outside absolute humidity values and machine；Further, judge whether the difference in machine between absolute humidity values and the outer absolute humidity values of machine exceeds default value range；If so, output alarm signal；Alarm module, connection processing module, the water leakage alarm for carrying out double water innercooling electric generator according to alarm signal prompt.The utility model is of simple structure and low cost, can improve differentiate generator whether the accuracy of leak, to reduce the false alarm probability of the differential leakage detection apparatus of conventional moisture.
Description
Technical Field
The utility model relates to an air thermodynamics field especially relates to the differential leak hunting device of humidity of cold-generator in two water.
Background
If the double-water internal cooling generator can be found in time and shut down in time when a trace of water leakage occurs, the double-water internal cooling generator can be repaired within several days, otherwise, serious accidents of generator burning loss can be caused once the water leakage is enlarged, the maintenance time usually exceeds one month, the whole set of machine furnace is accompanied and stopped, and the loss often exceeds millions of yuan. Although the water leakage probability is greatly reduced by continuously improved manufacturing process, the existing double-water-cooled generator still needs to be provided with a sensitive and reliable water leakage alarm device. If the old unit of the put-into-operation power plant is not perfected and has higher water leakage probability, the old unit is required to be selected and installed quickly.
The 11.3.3.2 article of twenty-five key measures published by the national electric power company in 2000 and 9 months provides a sensitive and reliable water leakage alarm device.
A SCJ-1 type humidity differential leak detector is created by a high-level engineer in the retirement professor of the electrical industry in 1989, and the main working principle is as follows: meanwhile, the absolute humidity of the air inside and outside the generator is measured and compared, and the double-water internal cooling generator is not strictly sealed and has air leakage. When water does not leak, the absolute humidity inside and outside the machine is equal. When water leaks from the machine, the absolute humidity in the machine is higher than the absolute humidity outside the machine, and the larger the water leakage is, the larger the absolute humidity difference between the inside and the outside of the machine is, so that the influence of the change of the humidity outside the machine can be eliminated, and the machine is very sensitive. Meanwhile, the trend of water leakage change can be seen from the change of the absolute humidity difference value. The original principle of differential leak detection of humidity inside and outside the machine is very concise and easy to understand. The SCJ-1 type humidity differential leak detector obtains the patent right granted by the national patent office to the utility model in 1989, and the publication number is as follows: CN 2073586.
Patent CN2073586 adopts a gas sample heat exchanger to make the humidity of the internal and external gas samples compare at the same temperature, that is, the internal gas sample is blown into the 11/4 "galvanized steel pipe placed in the cold air (air inlet) channel to pass through, so that the gas sample is cooled to the temperature close to the cold air temperature, then sent to the internal relative humidity sensor, and then blown into the steel pipe placed in the hot air (air outlet) channel of the generator by the micro blower to make the gas sample rise to the temperature close to the hot air temperature, and then blown into another steel pipe at the same position as the internal gas sample to make the external gas sample drop to the temperature close to the internal gas sample, and then sent to the external relative humidity sensor, and then the exhaust valves of the two gas samples are adjusted to make the flow rate of the gas samples change, so that the temperatures of the two gas samples are close to the same temperature. In this case, the absolute humidity difference can be replaced by the relative humidity difference of the two gas samples, and the two gas samples are basically not affected by load change after one temperature adjustment, and are said to be stable and unchanged for long-term use.
However, CN2073586 cannot convert absolute humidity and relative humidity, and cannot intelligently compensate humidity temperature, pressure and wind speed. In addition, in order to realize comparability of the internal humidity and the external humidity, the CN2073586 patent must be equipped with a complex gas pretreatment mechanism, i.e. a heat exchanger, such as an air blower, a regulating valve pipeline, and the like, so that two gases with different temperatures are subjected to heat exchange, and the regulation is waited until the internal temperature and the external temperature are the same, and the two gases can not normally work and be compared. Once the two temperature adjustments are deviated, the humidity is inevitably deviated, and a false alarm is given.
SUMMERY OF THE UTILITY MODEL
In view of the above shortcomings of the prior art, an object of the present invention is to provide a humidity differential leak detection device for a dual water-cooled generator, which is used to solve the problems of complicated structure, limited function, etc. of the humidity differential leak detection device in the prior art.
In order to achieve the above objects and other related objects, the present invention provides a humidity differential leakage detecting device for a dual water internal cooling generator, comprising: the input module is used for acquiring the measured value of the temperature and humidity of the air inside the double-water internal cooling generator and the measured value of the temperature and humidity of the air outside the generator; the processing module is connected with the input module and is used for converting the measured values of the internal humidity and the external humidity under different temperature measured values into an internal absolute humidity value and an external absolute humidity value under the same temperature; further, judging whether the difference value between the internal absolute humidity value and the external absolute humidity value exceeds a preset numerical range or not; if yes, outputting an alarm signal; and the alarm module is connected with the processing module and used for carrying out water leakage alarm prompt of the double-water-cooled generator according to the alarm signal.
In an embodiment of the present invention, the input module is further configured to: acquiring an internal air pressure measurement value and an external air pressure measurement value of the double-water internal cooling generator and/or an internal air wind speed measurement value and an external air wind speed measurement value; the processing module is further configured to: and converting the measured values of the internal humidity and the external humidity at different temperatures, pressures and/or wind speeds into the internal absolute humidity value and the external absolute humidity value at the same temperature, the same pressure and/or the same wind speed.
In an embodiment of the present invention, the apparatus further includes: and the transmission module is connected with the processing module and used for sending the digital quantity output by the processing module to the outside.
In an embodiment of the present invention, the transmission module includes: and the D/A conversion module is used for converting the digital quantity output by the processing module into an analog quantity and outputting the analog quantity.
In an embodiment of the present invention, the transmission module and the processing module are electrically isolated from each other.
In an embodiment of the present invention, the apparatus further includes: the storage module, the watchdog module, the serial port communication module and/or the human-computer interaction module are/is connected with the processing module; the serial port communication module is used for acquiring a control instruction of terminal equipment in communication connection with the device and sending response information to the terminal equipment; and the human-computer interaction module is used for displaying corresponding parameter information according to the input of the user.
In an embodiment of the present invention, the input module includes: an analog signal input module and/or a digital signal input module.
In an embodiment of the present invention, the analog signal input module includes: an A/D conversion module; the digital signal input module includes: a fieldbus transceiver, or a communications bus.
In an embodiment of the present invention, the processing module includes: embedded microcomputers, or FPGA systems.
In an embodiment of the present invention, the alarm module includes: an optical alarm module and/or an acoustic alarm module.
As above, the utility model discloses a differential leak hunting device of humidity of cold-generator in two water has following beneficial effect:
1) the conversion between the relative humidity and the absolute humidity can be carried out, the high-precision temperature, pressure and wind speed intelligent compensation can be carried out on the humidity, and the micro-leakage of the generator can be judged more truly and accurately, so that the false alarm probability of the traditional humidity differential leakage detection device is greatly reduced, and the reliability of equipment is improved;
2) the mechanical adjusting mechanism with the same temperature, pressure and wind speed, and the complex mechanisms such as the air blower, the adjusting valve, various pipelines and the like which are matched for adjusting to the same temperature, pressure and wind speed are saved, and social resources and energy consumption are saved;
3) the humidity sensors do not need to be accurately matched, a complex matching process in product production and processing is omitted, a user can conveniently replace a damaged single sensor at any time, and two sensors do not need to be replaced in a matched mode due to the fact that one sensor is damaged. (in conventional measurement methods, both must be replaced at the same time if one is damaged, since they must be matched to each other)
Drawings
Fig. 1 is a schematic structural diagram of a humidity differential leak detection device of a dual internal water-cooled generator in an embodiment of the present invention.
Fig. 2A is a schematic structural diagram of a humidity differential leak detection device of a dual internal water-cooled generator according to another embodiment of the present invention.
Fig. 2B is a schematic structural diagram of a humidity differential leak detection device of a dual internal water-cooled generator according to another embodiment of the present invention.
Fig. 3 is a schematic external view of a humidity differential leak detector according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.
Referring to fig. 1, in order to solve the problem that the structure of the differential humidity leak detection device in the prior art is complex and the conversion between the relative humidity and the absolute humidity cannot be performed, the present embodiment provides a differential humidity leak detection device 100 for a dual-water internal cooling generator, so as to more accurately determine whether the generator leaks water and reduce the false alarm probability of the conventional differential humidity leak detection device.
The differential leak hunting device 100 of humidity of two internal water cooled generators of this embodiment is a hardware equipment, and its major structure includes: the input module 101, the processing module 102, and the alarm module 103 further include: the device comprises a transmission module, a storage module, a watchdog module, a serial port communication module and/or a human-computer interaction module.
Referring to fig. 2A and 2B, the input module may be an analog signal input module (the humidity sensor is analog) such as an a/D conversion module or a digital signal input module (the humidity sensor is digital), such as: a fieldbus transceiver, IIC bus, SPI bus, or other communication bus. The processing module can adopt an embedded microcomputer or an FPGA system. The alarm module can adopt sound and light alarm modes. The transmission module needs to be electrically isolated from the processing module, and a D/a conversion module, such as a 4-20 mA circuit, may be used to convert the digital quantity output by the processing module into at least one 4-20 mA analog signal for output, so as to facilitate use of other systems such as DCS (Distributed control system). The memory module may be an EEPROM (electrically erasable and Programmable read only memory) or the like. The serial port communication module can adopt an RS485 communication system, thereby providing Modbus and Profibus communication protocols for other systems such as DCS and the like. The display part of the man-machine interaction module can adopt a light column and a nixie tube, the input part can adopt a physical keyboard, and the man-machine interaction module can also directly adopt a touch screen integrating display and input into a whole, and the like.
Referring to the schematic diagrams shown in fig. 2A and 2B, first, information such as temperature, humidity (measured value is relative humidity), wind speed, pressure, etc. of two internal and external sample gases measured simultaneously is received in an a/D conversion or data communication manner; then, the CPU carries out accurate absolute humidity conversion by substituting related parameters into a Claebranon-Clariss formula and combining with a saturated water air pressure and related parameter table in an appendix of a national standard-humidity measurement method (GB/T11605-2005) of the people's republic of China, and converts sample air under two different temperatures, different pressures and different wind speeds into absolute humidity under the same temperature, pressure and wind speed; then, an intelligent measurement alarm is made based on the difference between the two absolute humidities, for example: if the difference value between the internal absolute humidity value and the external absolute humidity value is smaller than the lower limit of the preset numerical range, alarming that the humidity is too low is carried out; and if the difference value is larger than the upper line of the preset numerical range, alarming the overhigh humidity. The skilled person can distinguish between an alarm with too low humidity and an alarm with too high humidity by setting different alarm presentation modes, and the detailed description is omitted here.
It should be noted that the wind speed and pressure input parameters in the above embodiments are optional parameters, and if there is no wind speed and pressure input parameter on site, the wind speed and pressure compensation will not be performed by the device. For the embodiment with wind speed and pressure compensation, the conversion precision is better than that of the scheme without wind speed and pressure compensation, and the calculation precision is higher.
It should be particularly noted that the function of converting the relative humidity to the absolute humidity realized by the processing module in the present embodiment and the function of outputting the alarm prompt according to the comparison result between the difference value of the absolute humidity and the preset value range are both existing, in other words, the hardware device provided in the present embodiment may be used in cooperation with the software program in the prior art, but the present embodiment does not relate to the improvement in the software technology at all.
Fig. 3 shows an external view of a humidity differential leak detector, which can realize the humidity differential leak detection of a double internal water-cooled generator based on the hardware device.
An input keyboard (an up-down debugging button, a confirmation button, a zero clearing button and the like), an output screen (a light column and a nixie tube) and indicator lamps for indicating the type of output information (internal temperature, external temperature, internal humidity, external humidity, internal pressure, external pressure, humidity difference and the like, wherein AL1 and AL2 respectively indicate that the measured value input by the device is in an analog type or a digital type). The user can select the information type to be acquired by inputting the upper and lower debugging buttons of the keyboard, then sends an instruction to the humidity differential leak detector by inputting the confirmation button on the keyboard, and the corresponding data is called and displayed on the light column nixie tube.
To sum up, the utility model discloses can carry out the intelligent computation compensation to two gas sample measured values outside and the built-in according to current algorithm, convert the sample gas under two different temperatures, different pressure, different wind speeds into the absolute humidity under same temperature, pressure and the wind speed to carry out the suggestion of intelligently reporting to the police according to the difference of absolute humidity. The utility model discloses do not restrict the form of two gas appearance measured values in the built-in and outside the machine, it can be analog quantity also can be the digital quantity. The utility model discloses simple structure, low cost can carry out the conversion between relative humidity and the absolute humidity, can carry out temperature, pressure, the wind speed intelligent compensation of high accuracy to humidity, can judge the generator and leak a little truthfully and accurately more to greatly reduced tradition humidity differential leak hunting device's wrong report probability of police has improved equipment reliability, has effectively overcome all sorts of shortcomings among the prior art and has had high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a differential leak hunting device of humidity of two internal water cooled generator which characterized in that includes:
the input module is used for acquiring the measured value of the temperature and humidity of the air inside the double-water internal cooling generator and the measured value of the temperature and humidity of the air outside the generator;
the processing module is connected with the input module and is used for converting the measured values of the internal humidity and the external humidity under different temperature measured values into an internal absolute humidity value and an external absolute humidity value under the same temperature; further, judging whether the difference value between the internal absolute humidity value and the external absolute humidity value exceeds a preset numerical range or not; if yes, outputting an alarm signal;
and the alarm module is connected with the processing module and used for carrying out water leakage alarm prompt of the double-water-cooled generator according to the alarm signal.
2. The apparatus of claim 1,
the input module is further configured to: acquiring an internal air pressure measurement value and an external air pressure measurement value of the double-water internal cooling generator and/or an internal air wind speed measurement value and an external air wind speed measurement value;
the processing module is further configured to: and converting the measured values of the internal humidity and the external humidity at different temperatures, pressures and/or wind speeds into the internal absolute humidity value and the external absolute humidity value at the same temperature, the same pressure and/or the same wind speed.
3. The apparatus of claim 1, further comprising: and the transmission module is connected with the processing module and used for sending the digital quantity output by the processing module to the outside.
4. The apparatus of claim 3, wherein the transmission module comprises: and the D/A conversion module is used for converting the digital quantity output by the processing module into an analog quantity and outputting the analog quantity.
5. The apparatus of claim 3, wherein the transmission module and the processing module are electrically isolated from each other.
6. The apparatus of claim 1, further comprising: the storage module, the watchdog module, the serial port communication module and/or the human-computer interaction module are/is connected with the processing module; wherein,
the serial port communication module is used for acquiring a control instruction of terminal equipment in communication connection with the device and sending response information to the terminal equipment;
and the human-computer interaction module is used for displaying corresponding parameter information according to the input of the user.
7. The apparatus of claim 1, wherein the input module comprises: an analog signal input module and/or a digital signal input module.
8. The apparatus of claim 7, wherein the analog signal input module comprises: an A/D conversion module; the digital signal input module includes: a fieldbus transceiver, or a communications bus.
9. The apparatus of claim 1, wherein the processing module comprises: embedded microcomputers, or FPGA systems.
10. The apparatus of claim 1, wherein the alarm module comprises: an optical alarm module and/or an acoustic alarm module.
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| CN201820069161.XU CN207923369U (en) | 2018-01-16 | 2018-01-16 | The differential humidity leak-detecting device of double water innercooling electric generator |
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| CN201820069161.XU CN207923369U (en) | 2018-01-16 | 2018-01-16 | The differential humidity leak-detecting device of double water innercooling electric generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108120563A (en) * | 2018-01-16 | 2018-06-05 | 上海禹舜电气有限公司 | Differential humidity leak-detecting device, leak hunting method and the system of double water innercooling electric generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108120563A (en) * | 2018-01-16 | 2018-06-05 | 上海禹舜电气有限公司 | Differential humidity leak-detecting device, leak hunting method and the system of double water innercooling electric generator |
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Inventor after: Wang Jianlin Inventor after: Chen Yuan Inventor before: Wang Jianlin |
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