A kind of air preheater device for detecting temperatureTechnical field
The present invention relates to thermometry, and in particular to a kind of air preheater device for detecting temperature.
Background technology
The important component of station boiler, such as：Air preheater, high temperature superheater, high temperature reheater, steam header etc., it is longPhase is under the severe bad border that high temperature, high pressure, gas attack, particle wash away, and pipe explosion accident easily occurs, and overtemperature creep is shadowOne of the reason for ringing maximum, therefore in order to the safe and stable operation of protection power station boiler air preheater is, it is necessary to important to theseThe wall surface temperature of part carries out on-line measurement and carries out life appraisal.Thermocouple common at present cannot for a long time tolerate high temperature ringBorder, the temperature parameter of the air preheater high temp objects in the infrared temperature measurement apparatus real time on-line monitoring flue with cooling device byGradually turn into a kind of trend.
Due to infrared detection device utilize be heat radiation transmission theory, the weight of HTHP is born in station boilerAir preheater of the part in flue is wanted, is covered by the gas and flying dust of heat radiation property of participation, due to the presence of flying dust, peaceDress is inconvenient, mechanism is complicated, later stage operation maintenance failure is high.
The content of the invention
It is an object of the present invention to overcome above-mentioned the deficiencies in the prior art, and then provide a kind of air preheater temperatureDegree monitoring device, simple structure of the present invention can effectively improve temperature transducer and be installed in high temperature, the air preheater of many dustsThe problems such as inconvenient, mechanism is complicated, later stage operation maintenance failure is high.
Technical scheme：
A kind of air preheater device for detecting temperature, it is characterised in that including sensor assembly, air channel, mounting box, heat transferElement, the sensor assembly is fixedly mounted on the mounting box, and the mounting box bottom is provided with the air channel.
Further, the sensor assembly includes fixing device, cooling cavity, sensor, and the fixing device will be manyThe individual sensor is fixed on the mounting box inwall, and the cooling cavity is arranged between multiple sensors.
Further, including sensor assembly described at least four.
Further, air inlet and gas outlet are provided with sensor assembly.
Further, the mounting box is arranged in air preheater.
The present invention has the advantages that relative to prior art：Air preheater temperature monitoring dress disclosed by the inventionPut, including sensor assembly, air channel, mounting box, heat transfer element, sensor assembly is arranged in mounting box, in mounting box bottomAir channel is set, while being provided with fixing device, multiple sensors in sensor assembly, it is empty that cooling is set between multiple sensorsChamber, outside increases cooling source of the gas, and cooling air-flow enters back into sensor assembly by air channel into air inlet, to installation elements boxIn sensor assembly reduction temperature, while purge sensor probe, receive heat transfer element after sensor assembly switches on powerNearly far infrared radiation, the thermal signal received in sensor assembly is converted to electric signal, then receives judgement infrared heat point by DCSFormed, be arranged such, effectively using infrared temperature-test sensor receive infra-red radiation flexibility the characteristics of, mounting structure drawer type letterSingle compact, installation site changes easy to maintenance, be prevented effectively from air it is a large amount of wash away the component damage that causes and install it is inconvenient,The problems such as mechanism is complicated, later stage operation maintenance failure is high.
Additional aspect of the invention and advantage will be set forth in part in the description, and will partly become from the following descriptionObtain substantially, or recognized by the practice invented.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the partial schematic diagram of the casing of the embodiment of the present invention；
1- sensor assemblies in figure；2- air channels；3- mounting boxs；4- fixing devices；5- cools down cavity；6- sensors；7- entersGas port；8- gas outlets.
Specific embodiment
Below with reference to accompanying drawing, the present invention is described in detail.
With reference to shown in Fig. 1 to Fig. 2, air preheater device for detecting temperature disclosed in the present embodiment, including sensor assembly1st, air channel 2, mounting box 3, heat transfer element, it is preferable that the sensor assembly 1 is fixedly mounted on the mounting box 3, describedThe bottom of mounting box 3 is provided with the air channel 2, and mounting structure drawer type is simply compact, and installation site is changed, easy to maintenance, manufactureIt is with low cost, it is more suitable for popularization and application.
Stating sensor assembly 1 includes fixing device 4, cooling cavity 5, sensor 6, it is preferable that it is solid disclosed in the present embodimentDetermine device 4 multiple sensors 6 are fixed on the inwall of the mounting box 3, cooling cavity 5 is arranged between multiple sensors 6, gasSource can enter cooling cavity 5 by air channel 2, be that the detecting head of sensor 6 in sensor assembly 1 is cleared up, and to sensingThe module of device 6 is lowered the temperature.
It is more accurate to improve the temperature sensing in air preheater, four sensors are at least installed in sensor assembly 16, four sensors 6 can cover the infrared ray for receiving whole heat transfer element planar radiation, and four sensors 6 gather infrared number simultaneouslyAccording to.
For the detecting head for further improving the sensor 6 in sensor assembly 1 is cleared up, and sensor 6 is droppedTemperature, it is preferable that air inlet 7 and gas outlet 8 are provided with sensor assembly 1, source of the gas is entered in mounting box 3 by air channel 2, thenSensor assembly is entered by the water conservancy diversion of air inlet 7, air-flow is discharged through cooling down cavity 5 from gas outlet 8.
To avoid installing the problems such as inconvenient, mechanism is complicated, later stage operation maintenance failure is high, mounting box 3 is set to take outDrawer formula structure is arranged in air preheater, and simple structure is compact, facilitates the replacing of later stage installation site, and first device in deviceThe renewal and maintenance of part.
Above example is the exemplary illustration to this patent, does not limit its protection domain, people in the artMember can also be changed to its part, as long as no the Spirit Essence beyond this patent, all in the protection domain of this patent.