CN201628579U - Air pre-heater hot spot detection device based on infrared array sensors - Google Patents
Air pre-heater hot spot detection device based on infrared array sensors Download PDFInfo
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- CN201628579U CN201628579U CN2009203185396U CN200920318539U CN201628579U CN 201628579 U CN201628579 U CN 201628579U CN 2009203185396 U CN2009203185396 U CN 2009203185396U CN 200920318539 U CN200920318539 U CN 200920318539U CN 201628579 U CN201628579 U CN 201628579U
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Abstract
The utility model discloses an air pre-heater hot spot detection device based on infrared array sensors, which comprises a mechanical portion and an electrical portion. The mechanical portion comprises a transverse beam in crossing connection between a rotor rotary shaft and a furnace wall; a driving motor is fixed on a main box at one end of the transverse beam; a plurality of supporting frame groups are arranged on the transverse beam; a group of infrared array sensors and a protective cover plate are installed on each supporting frame; the protective cover plate is rotatably connected with the driving motor through a rotary shaft of the protective cover plate; outer sleeves of the infrared array sensors are connected with a water inlet pipe and a water outlet pipe of a cooling water pipe; and air blowing pipelines of the infrared array sensors are connected with an air blowing pipe. The electrical portion comprises a controller respectively connected with the infrared array sensors, a touch screen, a DCS, a data switch module and an analog module, the data switch module is connected with a detection control switch; and the analog module is connected with a heat coupler. The air pre-heater hot spot detection device has simple structure, low failure rate and short fire behavior judgment time.
Description
Technical field
The utility model belongs to the Detection Technology and Automatic Equipment field, and the focus that is used for the station boiler air preheater detects, and relates to a kind of air pre-heater hot spot pick-up unit based on infrared sensor array.
Background technology
Rotary regenerative air heater is a heat transmission equipment important in the thermal power generation unit, and its effect is the air themperature that improves boiler combustion system, reduces exhaust gas temperature, reduces heat loss due to exhaust gas, plays effect energy-conservation, that lower consumption, improve unit output.In actual moving process, because self structure, air preheater has the hidden danger that spontaneous combustion takes place.On the heat accumulating element of not clean-burning fuel deposition at air preheater, along with the rising of temperature, focus is promptly dried and formed to sediment.When heat accumulating element temperature in the air preheater continued to rise to more than 700 ℃, focus enlarged and the corrode heat accumulating element thereupon, causes air preheater on fire.When air preheater takes place to burn again, gently then half side unit outage, heavy then can cause air preheater seriously to damage and cause unit to be stopped transport for a long time, consequent loss is huge.Therefore China in 1994 has just stipulated that in power industry standard " at single-machine capacity is the automatic fire alarm device that 200MW and above generating plant should be provided with air preheater.The air pre-heater hot spot pick-up unit is set finds the condition of a fire as early as possible, take effective control measure, make the harm of fire reduce to minimum degree, create great economic benefit to enterprise.
The air preheater hot spot pick-up unit that comes into operation at present all adopts portable structure, and promptly temperature probe carries out reciprocating type detection in the mode that moves to the temperature field of air preheater.In the air preheater operational process, because the extremely abominable high-temperature of its internal environment, high dust and high corrosion, the easy generating mechanism of mobile hot point detection device " stuck " fault is in case mechanism's " stuck " will influence the operational percentage of system.In addition when there is focus in air preheater, because that the characteristics of portable structure itself cause detecting the focus time is longer, therefore there is certain detection hysteresis problem in this detection mode, if hysteresis seriously can lose the best opportunity of finding focus as early as possible.Therefore improve system's operational percentage and the shortening heat point detection time is the major issue that the air pre-heater hot spot pick-up unit will solve.
Summary of the invention
The purpose of this utility model is to provide a kind of air pre-heater hot spot pick-up unit based on infrared sensor array, has solved the problem that existing mobile hot point detection device mechanical fault is many, detect the serious hysteresis of data.
The technical solution adopted in the utility model is, a kind of air pre-heater hot spot pick-up unit based on infrared sensor array comprises mechanical part and electric part,
Described mechanical part comprises crossbeam, crossbeam is connected across between rotor shaft and the furnace wall, be provided with main box at crossbeam one end, be fixed with drive motor on the main box, crossbeam is provided with many group bracing frames, one group of infrared sensor array is installed on each bracing frame, correspondence is provided with a cover sheet on every group of infrared sensor array, each cover sheet is in transmission connection by cover sheet rotating shaft and drive motor, the infrared sensor array overcoat links to each other with rising pipe with the water inlet pipe of cooling water pipe, and the gassing pipe of infrared sensor array links to each other with gas blow pipe;
Described electric part comprises controller, electric part comprises controller, controller is connected respectively with infrared sensor array, touch-screen, DCS, digital switch quantity module, analog module, and the digital switch quantity module is connected with the detection gauge tap, and analog module is connected with thermopair.
Hot point testing apparatus of the present utility model, its feature also is:
Described touch-screen is connected with controller by TCP/IP Modbus agreement.
Hot point testing apparatus of the present utility model, failure rate simple in structure is low, can detect focus in real time, has to declare alert accuracy height, and the condition of a fire differentiation time is short, installation, easy and simple to handle.
Description of drawings
Fig. 1 is a hot point testing apparatus structural representation of the present utility model;
Fig. 2 is a hot point testing apparatus structural representation of the present utility model;
Fig. 3 is a hot point testing apparatus structural representation of the present utility model;
Fig. 4 is the electric part structured flowchart of the utility model pick-up unit.
Among the figure, 1. crossbeam, 2. infrared sensor array; 3. cover sheet, 4. cover sheet rotating shaft, 5. bracing frame; 6. drive motor, 7. main box, 8. cooling water pipe; 9. gas blow pipe, 10. cable tube, 11 controllers; 12. touch-screen, 13.DCS, 14. thermopairs, 15. digital switch quantity modules; 16. analog module, 17. detect gauge tap.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
The utility model device comprises mechanical part and electric part.
With reference to Fig. 1, Fig. 2 and Fig. 3; the mechanical part of the utility model device is installed in the cool air inlet place of air preheater; the structure of this mechanical part is to be made up of crossbeam 1, infrared sensor array 2, cover sheet 3, cover sheet rotating shaft 4, bracing frame 5, drive motor 6, main box 7, cooling water pipe 8, gas blow pipe 9 and cable tube 10.Its middle cross beam 1 is connected across between rotor shaft and the furnace wall, be provided with main box 7 at crossbeam 1 one ends, be fixed with drive motor 6 on the main box 7, crossbeam 1 is provided with many group bracing frames 5, one group of infrared sensor array 2 is installed on each bracing frame 5, crossbeam 1 and bracing frame 5 are used for carrying infrared sensor array 2, also be provided with a cover sheet 3 on each bracing frame 5, go back correspondence on every group of infrared sensor array 2 and be provided with a cover sheet 3, cover sheet 3 does not shield to infrared sensor array 2 when the utility model device is not devoted oneself to work, each cover sheet 3 is in transmission connection by cover sheet rotating shaft 4 and drive motor 6, is used for controlling cover sheet 3 and opens and closes; Infrared sensor array 2 overcoats link to each other with rising pipe with the water inlet pipe of cooling water pipe 8, and cooling water pipe 8 is used for connecting chilled water to infrared sensor array 2 lowers the temperature, and guarantees infrared sensor array 2 internal circuit operate as normal; The gassing pipe of infrared sensor array 2 links to each other with gas blow pipe 9, and gas blow pipe 9 is used for cleaning the dust on infrared sensor array 2 camera lenses, guarantees accuracy of detection; Infrared sensor array 2 needed cables are laid parcel by cable tube 10, comprise service cable and umbilical cable, and all cables are played a protective role.Cover sheet 3 is rotated by drive motor 6 controls by cover sheet rotating shaft 4; when the utility model device is not devoted oneself to work; cover sheet 3 is in closed condition; infrared sensor array 2 is shielded; when the utility model device is devoted oneself to work; cover sheet 3 is in open mode, and infrared sensor array 2 is normally measured.
As shown in Figure 4, electric part structure of the present utility model is, electric part comprises controller 11, controller 11 is connected respectively with infrared sensor array 2, touch-screen 12, DCS 13, digital switch quantity module 15, analog module 16, digital switch quantity module 15 is connected in series with detecting gauge tap 17, and analog module 16 is connected with thermopair 14.
Signal transmission realizes that with the Modbus bus mode touch-screen 12 is connected with controller 11 by TCP/IP Modbus agreement, is used for display system state and fault, and can be used to be provided with systematic parameter.Controller 11 is core components of electric device, and it is mainly finished focus and judges signal Processing, data recording, fault judgement and control command generation.Utilize its Ethernet interface and serial ports to realize respectively being connected with the communication of touch-screen 12, digital switch quantity module 15, analog module 16 and infrared sensor array 2.Digital switch quantity module 15 has realized the switching value signal arrives the switching value signal to Modbus communication data or Modbus communication data conversion; cooperate detection gauge tap 17 (Boolean value output sensor) to finish system cools water state, cover sheet 3 status detection, and can realize the control of cover sheet 3 states and purge solenoid valve start and stop.Analog module 16 is mainly finished the change of thermopair 14 measuring-signals and is sent.
Electric device mainly finishes fire alarm, temperature signal sampling, processes temperature signal, data storage, cover sheet control, purge control, communicate by letter with DCS, system state detects and function such as system failure warning, wherein fire judgement, processes temperature signal, data storage, fault judgement and steering order generation are by controller 11 realizations; System state, fault show and the parameter setting is realized by the built-in touch screen; The temperature signal sampling is realized by infrared sensor array and thermopair; System state detects and the blow device start and stop realize by detecting gauge tap; Data transmission is realized by the Modbus bus.
The workflow of air pre-heater hot spot pick-up unit of the present invention is:
The first, give infrared sensor array 2 and thermopair 14 power supplies, make it be in normal condition, open cold radiator cooler, blow device, and make electric device start operation;
The second, when the air preheater running temperature surpassed certain temperature value, the cover sheet 3 of hot point testing apparatus was opened, and infrared sensor array 2 begins to measure the air preheater temperature of rotor;
The 3rd, infrared sensor array 2 sends temperature signal to controller 11 by the Modbus bus; The temperature signal of thermopair 14 sends controller 11 to by the Modbus bus after the change of analog module 16 signal conditions is sent;
The 4th, after controller 11 receives temperature signal, judge whether to exist focus according to declaring alert algorithm, and data are stored.
The 5th, controller 11 sends judged result to touch-screen 12 on the one hand, on the other hand, sends external interface to by DCS 13, makes things convenient for miscellaneous equipment to read related data.
Hot point testing apparatus of the present utility model, failure rate simple in structure is low, can detect focus in real time, has to declare alert accuracy height, and the condition of a fire differentiation time is short, installation, easy and simple to handle.The air pre-heater hot spot that is applicable to 300MW, 600MW and 1000MW unit detects.
Claims (2)
1. the air pre-heater hot spot pick-up unit based on infrared sensor array comprises mechanical part and electric part, it is characterized in that,
Described mechanical part comprises crossbeam (1), crossbeam (1) is connected across between rotor shaft and the furnace wall, be provided with main box (7) at crossbeam (1) one end, be fixed with drive motor (6) on the main box (7), crossbeam (1) is provided with many group bracing frames (5), one group of infrared sensor array (2) is installed on each bracing frame (5), every group of infrared sensor array (2) gone up correspondence and is provided with a cover sheet (3), each cover sheet (3) is in transmission connection by cover sheet rotating shaft (4) and drive motor (6), infrared sensor array (2) overcoat links to each other with rising pipe with the water inlet pipe of cooling water pipe (8), and the gassing pipe of infrared sensor array (2) links to each other with gas blow pipe (9);
Described electric part comprises controller (11), controller (11) and infrared sensor array (2), touch-screen (12), DCS(13), digital switch quantity module (15), analog module (16) be connected respectively, digital switch quantity module (15) is connected with detection gauge tap (17), and analog module (16) is connected with thermopair (14).
2. hot point testing apparatus according to claim 1 is characterized in that: described touch-screen (12) is connected with controller (11) by the TCP/IPModbus agreement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203185396U CN201628579U (en) | 2009-12-25 | 2009-12-25 | Air pre-heater hot spot detection device based on infrared array sensors |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203185396U CN201628579U (en) | 2009-12-25 | 2009-12-25 | Air pre-heater hot spot detection device based on infrared array sensors |
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| Publication Number | Publication Date |
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| CN201628579U true CN201628579U (en) | 2010-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009203185396U Expired - Fee Related CN201628579U (en) | 2009-12-25 | 2009-12-25 | Air pre-heater hot spot detection device based on infrared array sensors |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854794A (en) * | 2012-08-14 | 2013-01-02 | 王兆进 | Intelligent medium-short wave infrared drying equipment controller |
| CN104880163A (en) * | 2015-06-03 | 2015-09-02 | 衡阳镭目科技有限责任公司 | Electromagnetic ultrasonic sensor and pipeline wall thickness detection system |
| CN107917761A (en) * | 2017-11-17 | 2018-04-17 | 航天科工哈尔滨风华有限公司电站设备分公司 | A kind of infrared heat point detection device |
| US10429650B2 (en) | 2016-01-28 | 2019-10-01 | Coretronic Corporation | Head-mounted display |
-
2009
- 2009-12-25 CN CN2009203185396U patent/CN201628579U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854794A (en) * | 2012-08-14 | 2013-01-02 | 王兆进 | Intelligent medium-short wave infrared drying equipment controller |
| CN104880163A (en) * | 2015-06-03 | 2015-09-02 | 衡阳镭目科技有限责任公司 | Electromagnetic ultrasonic sensor and pipeline wall thickness detection system |
| US10429650B2 (en) | 2016-01-28 | 2019-10-01 | Coretronic Corporation | Head-mounted display |
| CN107917761A (en) * | 2017-11-17 | 2018-04-17 | 航天科工哈尔滨风华有限公司电站设备分公司 | A kind of infrared heat point detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101110 Termination date: 20121225 |