CN206362311U - The laser detector of rotary regenerative air preheater rotor deformation - Google Patents

The laser detector of rotary regenerative air preheater rotor deformation Download PDF

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Publication number
CN206362311U
CN206362311U CN201621349332.1U CN201621349332U CN206362311U CN 206362311 U CN206362311 U CN 206362311U CN 201621349332 U CN201621349332 U CN 201621349332U CN 206362311 U CN206362311 U CN 206362311U
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China
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laser
pipeline
ball valve
stove
air cooling
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CN201621349332.1U
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Inventor
杨延西
邓毅
郑岗
李听团
宋念龙
刘丁
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Xian University of Technology
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Xian University of Technology
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Abstract

The utility model discloses a kind of laser detector of rotary regenerative air preheater rotor deformation, the outer end for sweeping pipeline including air cooling is connected by furnace wall mounting flange with ball valve connecting line outside stove, ball valve is provided with the outer ball valve connecting line of the stove, the outer ball valve connecting line outer end of stove is connected with sensor mounting flange, and equipment cabinet is provided with the outside of sensor mounting flange;Generating laser and laser pick-off processing sensor are internally provided with equipment cabinet;Swept in air cooling outside pipeline and stove in ball valve connecting line, separate has input path passage and reflected light path passage up and down;The inner for sweeping pipeline in air cooling has been sequentially communicated spiral air curtain mechanism, dustless passage and dust-free locating pipe downwards, to rotor flange face below dust-free locating pipe;The inner for sweeping pipeline in air cooling is respectively arranged with incident right-angle prism and reflection right-angle prism.Of the present utility model simple in construction, reliable operation, accuracy is good.

Description

The laser detector of rotary regenerative air preheater rotor deformation
Technical field
The utility model belongs to technical field of the electromechanical equipment, is related to a kind of laser of rotary regenerative air preheater rotor deformation Detection means.
Background technology
" rotary regenerative air preheater " in fired power generating unit is one of major pant item of large scale industry boiler, also referred to as " is held Gram regenerative air heater ", referred to as " air preheater ".When air preheater works, the rotor equipped with heat accumulating element constantly rotates, and flue gas is from upper Portion enters air preheater, and newly enters air and enter air preheater from bottom, thus the high lower temperature of air preheater rotor upper end temperature it is low, from Fume side produce temperature when coming it is high, from air side enter fume side when temperature it is low, air preheater rotor be integrally heated it is uneven, therefore Rotor can produce the deformation of " mushroom " shape when air preheater works.The size of deformation is also with the change of boiler live load and working condition And change, produce load more aximal deformation value is bigger.Therefore the seal clearance between rotor and fixed sectors plate is a change Change amount.The different type of furnaces, its size is also different, and maximum changing range can reach more than 50mm.The presence of seal clearance causes greatly The combustion air of amount is leaked to flue, causes the increase of blower fan power consumption;Hot-air has taken away a large amount of heat energy simultaneously, directly results in boiler Combustion thermal efficiency declines.
For this problem, industrial widely used class measure at present is to use automatic control technology of leaking out, Seal clearance is measured by sensor, using the dynamic adjustment fanning strip hoisting mechanism position of automatic feedback control system, automatically with Track rotor hot shaping, reaches optimal hot end seal.Therefore, the detection of air preheater rotor hot deformation is whole Air leakage control The premise of system and basis.But, because the internal temperature in air preheater hot junction is up to 350 DEG C to 450 DEG C, and contain in flue gas Substantial amounts of dust and corrosive substance, therefore, in such rugged environment how the thermal deformation of stable detection air preheater rotor, It is to realize the above-mentioned key problem in technology for leaking out and automatically controlling.In addition, with the increase of unit capacity, the increasing of sealing sector plate width Greatly, causing sensor mounting location and space, (such as fanning strip is too small from manhole door spacing, air preheater outside cigarette by many factors Road or other pipelines are blocked, walkway platform is blocked) limitation, causing sensor to be unable to right angle setting when being provided with can only 90 degree of right angles tilt installation, and this all brings challenges to installing and using for sensor.
Different according to the sensor type of use, rotor deformation amount detection systems mainly have three types:One kind is feeler lever Formula rotor deformation detection technique, this method internally stretches into a mechanical feeler lever outside air preheater, when the touching of feeler lever front end To rotation air preheater rotor when detection switch act, air preheater rotor deformation is calculated according to the built-in length of now feeler lever Amount.Rotor is to rotate when being worked due to air preheater, can occur stronger friction with rotor interface when feeler lever front end, cause Feeler lever front end is worn and contraction in length, influences measurement accuracy.Therefore, the technology can not continuously measure the deformation of air preheater Amount, can only regularly sound out progress.A large amount of practical implementation results show that the fault rate of such system is higher, plant maintenance work Amount is also than larger.
Second of conventional detection method is high temperature modification current vortex rotor deformation measurement technique, and this method is based on current vortex Range measurement principle, fanning strip side is fixed on air preheater rotor measurement reference plane by high temperature resistance electric eddy-current sensor, can be with The distance between non-contact detecting current vortex sensor probe and air preheater rotor reference face, that is, gap of leaking out.The technology right and wrong Wear problem is not present in contact measurement, can continuously be measured.But, the finding range of the technical method is less than normal, generally Maximum range only has 0-20mm or so.Therefore, relative deformation can only be measured and realize control, current vortex sensor can only be in sector Install, moved with fanning strip, it is necessary to be equipped with the sealing machine part that can be stretched, installation is complicated on plate.Further, since sensor Installed inside air preheater, once damaging can not be repaired and be changed in hot running again, reduce and leak out automatic The automatic input rate of control system.
The third is the rotor deformation detection technique based on laser sensor, and this method mainly has two kinds of forms:It is a kind of It is that, based on general laser range sensor, another is the laser displacement sensor based on laser triangulation principle.Before Person uses single-point laser, and light beam is small, and path channels pipe diameter is smaller, easily installs, but due to general laser range sensor Generating laser and the too small outer about 1mm of receiver spacing, cause transmitting and receiving light path can only be in same pipeline.And it is actual In, to prevent furnace high-temperature back flow of gas, sensor is damaged, is typically isolated with pyroceram, but due to being complete in stove Darkness environment, causes transmitting laser to be very easy to be reflected by heat-protecting glass, forms light path interference, measurement failure;Further, since Pipeline is longer, easy temperature distortion so that the laser beam of transmitting be difficult to reliably to project in rotor measurement reference plane (by Light path tube wall is blocked, or deviate rotor measurement reference plane), also it is easily caused measurement failure.The latter is surveyed based on laser triangulation The spacing measured between the laser displacement sensor laser beam and laser inductor of principle is related to measurement range, and for air preheater Rotor deformation measure, in order to avoid pyrostat needs to be installed on outside air preheater, sensor to rotor measurement reference plane away from From typically in 1300mm or so, (about 400mm, heat-insulation layer about 300mm outside stove, the distance of furnace wall to rotor measurement reference plane is about 500mm), measurement effective travel 0-100mm or so, therefore measurement solstics needs 1300mm or so, cause sensor width compared with Greatly, typically in 200mm or so, integral sensors bulky dimensions, light path high temperature resistant heat insulation glass is larger, purging demand air quantity compared with Greatly.Further, since in-furnace temperature is higher, light path pipeline is easily deformed, and causes light path bias effect measurement accuracy and reliability, peace Dress required precision is higher, and enforcement difficulty is big.
As seen through the above analysis, the method for being currently based on high temperature modification current vortex sensor and laser sensor can Realize the real-time measurement of rotor deformation, but the former to measure useful range less than normal, it is impossible to online change is its main weakness;The latter Can change online, range it is big, compensate for the former deficiency, but light path is unstable, poor reliability is its crucial weakness.
Utility model content
The purpose of this utility model is to provide a kind of laser detector of rotary regenerative air preheater rotor deformation, solves Laser measuring device for measuring can not realize wide range, high reliability, real-time air preheater rotor deformation measurement in the prior art; The problem of online, convenient replacing can not be realized in the hot running of unit.
The utility model is the technical scheme adopted is that a kind of laser detection dress of rotary regenerative air preheater rotor deformation Put, including pipeline is swept in air cooling, the outer end that pipeline is swept in air cooling is connected by furnace wall mounting flange with ball valve connecting line outside stove, the stove Ball valve is provided with outer ball valve connecting line, the outer ball valve connecting line outer end of stove is fixedly connected with sensor mounting flange, sensed Equipment cabinet is installed on the outside of device mounting flange;Generating laser and laser pick-off processing sensor are internally provided with equipment cabinet; Swept in air cooling outside pipeline and stove in ball valve connecting line, separate has input path passage and reflected light path passage up and down;
The inner for sweeping pipeline in air cooling has been sequentially communicated spiral air curtain mechanism, dustless passage and dust-free locating pipe, nothing downwards To the rotor flange face of air preheater below dirt positioning pipe;The downward corner location in the inner for sweeping pipeline in air cooling is set respectively There are incident right-angle prism and reflection right-angle prism, fire resistant doorsets are provided with the outside of reflection right-angle prism.
The laser detector of rotary regenerative air preheater rotor deformation of the present utility model, is further characterized in that:
The transmitting pipeline of generating laser laser beam, successively including input path passage, incident right-angle prism, spiral air curtain Mechanism, dustless passage and dust-free locating pipe;By the reflection in rotor flange face, the reflection pipeline of laser beam is successively including dustless fixed Position pipe, dustless passage, spiral air curtain mechanism, reflection right-angle prism, reflected light path passage, sensor is handled into laser pick-off.
The outer end that pipeline is swept in air cooling is provided with dustless channel inlet mouthful.
Equipment cabinet outer wall is provided with equipment cabinet air inlet, equipment cabinet gas outlet and cable interface.
It is provided with fine setting jackscrew one, the mounting seat of laser pick-off processing sensor and sets in the mounting seat of generating laser There is fine setting jackscrew two.
The beneficial effects of the utility model are,
1) compared with probe rod type technology, the utility model is non-contact measurement, in the absence of mechanical wear problem, measurement effect Fruit can be with stable for extended periods of time.
2) compared with current vortex technology, the utility model measurement range is big, more than rotor deformation range 0-100mm, essence Degree ± 0.5mm, measurement apparatus, which is installed, safeguards easier, can online change, improve the effective operation of apparatus time;
3) compared with existing laser rotor deformation measurement apparatus, the small φ ≈ 45mm of the utility model pipeline caliber, length are short, It is adjustable, length range in 800-1200mm, can turn round, install and do not limited by space, it is easy for installation;Pipeline is short, thermal deformation It is small, it is hot thermal deformation measurement to be caused to fail;
4) spiral air curtain mechanism of the present utility model is heat-insulated, good dustproof effect;Generating laser, laser pick-off processing sensing Device is installed in outside air preheater, and has cooling air cooling, and in the absence of component parameters temperature drift problems, stability is more It is good.
Brief description of the drawings
Fig. 1 is the utility model apparatus structure schematic diagram;
Fig. 2 is that the utility model measurement apparatus installs and uses position view on preheater.
In figure, 1. generating lasers, 2. laser pick-ofves processing sensor, 3. input path passages, 4. reflected light path passages, 5. ball valve, pipeline is swept in 6. furnace wall mounting flanges, 7. sensor mounting flanges, 8. equipment cabinets, 9. air cooling, 10. incident right-angle prisms, 11. reflection right-angle prism, 12. spiral air curtain mechanisms, 13. fire resistant doorsets, 14. dustless passages, 15. dust-free locating pipes, 16. is dustless logical Road air inlet, 17. equipment cabinet air inlets, 18. cable interfaces, 19. fine setting jackscrews one, 20. equipment cabinet gas outlets, 21. fine setting tops Silk two, 22. air preheater furnace walls, 23. rotor flange faces, the outer ball valve connecting line of 24. stoves, 25. apparatus main bodies, 26. is fan-shaped Plate hoisting mechanism, 27. fanning strips.
Embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
Reference picture 1, Fig. 2, structure of the present utility model is, including pierces into the air cooling of air preheater furnace wall 22 and sweep pipeline 9, The outer end that pipeline 9 is swept in air cooling is connected by furnace wall mounting flange 6 with ball valve connecting line 24 outside stove, the outer ball valve connecting line of the stove Ball valve 5 is provided with 24, the outer outer end of ball valve connecting line 24 of stove is fixedly connected with sensor mounting flange 7, sensor fixation The outside of orchid 7 is provided with equipment cabinet 8, and the outer wall of equipment cabinet 8 is provided with equipment cabinet air inlet 17, equipment cabinet gas outlet 20 and cable interface 18;It is internally provided with equipment cabinet 8 in generating laser 1 and laser pick-off processing sensor 2, the mounting seat of generating laser 1 It is provided with fine setting jackscrew 1, the mounting seat of laser pick-off processing sensor 2 and is provided with fine setting jackscrew 2 21;Pipe is swept in air cooling In road 9 and the outer ball valve connecting line 24 of stove, separate has input path passage 3 and reflected light path passage 4 up and down;
The inner for sweeping pipeline 9 in air cooling has been sequentially communicated downwards spiral air curtain mechanism 12, dustless passage 14 and adjustable Dust-free locating pipe 15, the lower section of dust-free locating pipe 15 is to the rotor flange face 23 of air preheater;The inner of pipeline 9 is swept in air cooling Downward corner location is respectively arranged with incident right-angle prism 10 and reflection right-angle prism 11, is set in the outside of reflection right-angle prism 11 There are fire resistant doorsets 13;The radiating laser beams pipeline of generating laser 1, successively including input path passage 3, incident right-angle prism 10, Spiral air curtain mechanism 12, dustless passage 14 and dust-free locating pipe 15, pass through the reflection in rotor flange face 23, the reflection tube of laser beam Road includes dust-free locating pipe 15, dustless passage 14, spiral air curtain mechanism 12, reflection right-angle prism 11, reflected light path passage successively 4, handle sensor 2 into laser pick-off;The outer end for sweeping pipeline 9 in air cooling is provided with dustless channel inlet mouthful 16.
The laser beam that above-mentioned generating laser 1 is launched, passes sequentially through input path passage 3, incident right-angle prism 10, spiral shell Whirlwind screen mechanism 12, dustless passage 14 and dust-free locating pipe 15 reach rotor flange face 23, by the reflection in rotor flange face 23, The laser beam of reflection pass sequentially through again dust-free locating pipe 15, dustless passage 14, spiral air curtain mechanism 12, reflection right-angle prism 11, Reflected light path passage 4, sensor 2 is handled into laser pick-off, is received by laser pick-off processing sensor 2 and is completed corresponding number According to processing.
Generating laser 1, input path passage 3, incident right-angle prism 10, reflection right-angle prism 11, reflected light path passage 4th, laser pick-off processing sensor 2 is assembled into one, and is arranged on by fixing bolt on sensor mounting flange 7, can be overall Extract, clean or replace out of stove.
Ball valve 5, incident right-angle prism 10 and reflection right-angle prism 11 are high temperature resistant component, be can be resistant to 1200 degrees Celsius high Temperature.
Generating laser 1 handles sensor 2 with laser pick-off and employs special split design, and such light path passes through two Different passages is propagated, and two light paths are completely separated, and transmitting light beam and the reflected beams are independent of each other, and overcome existing laser rotor Deformation detection sensor causes the problem of measurement signal is unstable due to light path interference.Pipeline diameter is based on laser triangulation with existing The long range laser displacement sensor of method measuring principle is compared and greatly reduced, the outer pipeline diameter phi ≈ 45mm of whole device.Laser Transmitter 1 handles the range 50-5000mm of sensor 2 with laser pick-off, and precision reaches ± 1.0mm.
Incident right-angle prism 10 and reflection right-angle prism 11 each realize light path steering, overcome existing rotor deformation inspection Surveying sensor can only directly go out, the problem of actual installation limited space causes length long (more than 2000mm).The utility model is filled Put and employ L-type structure circuit design, entire length can be controlled in 800-1200mm, and length is short, and thermal deformation is small, to measurement Influence can be ignored.Incident right-angle prism 10 and reflection right-angle prism 11 are handled by nano-coating, and light transmittance is high, be difficult product Ash, it is ensured that the reliability that optical path is propagated.
According to actual needs, the fine setting jackscrew 1 of regulation generating laser 1 or laser pick-off processing are sensed in use The fine setting jackscrew 2 21 of device 2, realizes the fine setting of respective light path, enables in whole measurement range 0-100mm and launches light beam Connect and accurately receive by receiver, because pipeline total length is relatively short, the influence of temperature distortion can be ignored, therefore be prevented effectively from The laser beam that existing laser rotor deformation measurement apparatus is present is difficult to reliably project in rotor measurement reference plane by light path Tube wall, which blocks or deviateed rotor measurement flange face, causes the problem of measurement is failed.
Pipe is swept in spiral air curtain mechanism 12, dustless passage 14, adjustable dust-free locating pipe 15, furnace wall mounting flange 6, air cooling Road 9, equipment cabinet 8 are collectively referred to as heat-insulated and soot blowing component.Dustless channel inlet mouthful 16 of the compression cooling wind from furnace wall mounting flange 6 Into while sweeping pipeline 9 by air cooling path channels are cooled down, into spiral air curtain mechanism 12, spiral air curtain mechanism 12 is adopted With special eddy airstream structure design, cooling wind forms whirlpool air partition, can prevent high temperature gas containing dust overflow, play herein The effect of thermal insulation and dust-proof, compression cooling wind blows to rotor flange face by dustless passage 14 and adjustable dust-free locating pipe 15 23, dust stratification above is removed, the design had both overcome influence of the dust stratification to measurement, and in turn ensure that the cleaning of beam path, enter one Step improves Measurement reliability and validity.In addition, equipment cabinet 8 devises the corresponding coolant interface (He of equipment cabinet air inlet 17 Equipment cabinet gas outlet 20), compression cooling wind slave unit cabinet air inlet 17 enters, and is discharged by equipment cabinet gas outlet 20, laser is sent out Emitter 1 and laser pick-off processing sensor 2 are cooled down, and make its temperature within 50 DEG C, due to sensor bulk small diameter About 50mm, therefore only need to less throughput.
Fire resistant doorsets 13, ball valve 5 are referred to as protecting component, when needing to carry out light path cleaning or equipment replacement, open outside pass Sensor is fixedly connected with the fixed screw on flange 7, and equipment cabinet 8 is removed, and takes generating laser 1 and laser pick-off processing sensing apart Device 2 is fixedly connected with the fixed screw on flange 7 with sensor, by generating laser 1, input path passage 3, incident right-angle prism 10th, reflection right-angle prism 11, reflected light path passage 4, laser pick-off processing sensor 2 are extracted together, are prevented during extraction Vent 13 rotates down (movement) in the case where carrying spring force effect, and the stove inner port that the air cooling in stove is swept into pipeline 9 is closed, and is prevented Only high-temperature gas overflows, and when ball valve 5 is left in extraction part, manually closes ball valve 5, further prevents high-temperature gas from overflowing, from And ensure the safety of replacing.When light path clean or change finish need to install again when, first manual unlocking ball valve 5, by extraction Component promotes air cooling to sweep pipeline 9 together, shifts bottom onto always, and fire resistant doorsets 13 are pushed automatic opening, then fixes sensor and connects The fixed screw of acting flange 7 is locked, and reinstalls equipment cabinet 8 and lock screw is i.e. replaceable finishes.
The utility model is collectively referred to as apparatus main body 25, and mounting means of the apparatus main body 25 on air preheater be,
Reference picture 2, open a mounting hole in air preheater furnace wall 22 first, and the mounting hole is located proximate to fanning strip 27 With fanning strip hoisting mechanism 26, and higher than rotor flange face 23 height and position 300-500mm;Apparatus main body 25 is passed through into peace Dress hole is installed in place, and regulates the height and angle of dust-free locating pipe 15 so that dust-free locating pipe 15 can be directly to rotor flange The center in face 23, then fixes (welding) on furnace wall so that apparatus main body 25 is with furnace wall mounting flange by furnace wall mounting flange 6 6 install firm.
The course of work of the present utility model is,
Generating laser 1 launches laser beam, by input path passage 3, reaches incident right-angle prism 10, laser beam is by 90 Degree is turned to, and passes downwardly through spiral air curtain mechanism 12, rotor is projected along dustless passage 14 and adjustable dust-free locating pipe 15 On flange face 23;The laser beam in rotor flange face is projected, after being reflected by rotor flange face 23, upwards along dust-free locating pipe 15th, dustless passage 14 passes through spiral air curtain mechanism 12, and reflected right-angle prism 11, the reflected beams by 90 degree of steerings, are passed through again Reflected light path passage 4 is reflected back in laser pick-off processing sensor 2, so as to obtain the deformation value in rotor flange face 23, is powered Connection and the data output with external electrical equipment are realized by the cable interface 18 of equipment cabinet 8 with signal output.

Claims (5)

1. a kind of laser detector of rotary regenerative air preheater rotor deformation, it is characterised in that:Pipeline is swept including air cooling (9), air cooling is swept the outer end of pipeline (9) and connected by furnace wall mounting flange (6) and the outer ball valve connecting line (24) of stove, the stove ectosphere Ball valve (5) is provided with valve connecting line (24), outer ball valve connecting line (24) outer end of stove and sensor mounting flange (7) are fixed Equipment cabinet (8) is installed on the outside of connection, sensor mounting flange (7);Generating laser (1) is internally provided with equipment cabinet (8) With laser pick-off processing sensor (2);In the outer ball valve connecting line (24) of pipeline (9) and stove is swept in air cooling, separate up and down have into Penetrate path channels (3) and reflected light path passage (4);
The inner for sweeping pipeline (9) in air cooling has been sequentially communicated downwards spiral air curtain mechanism (12), dustless passage (14) and dustless fixed Position pipe (15), to the rotor flange face (23) of air preheater below dust-free locating pipe (15);The interior of pipeline (9) is swept in air cooling Downward corner location is held to be respectively arranged with incident right-angle prism (10) and reflection right-angle prism (11), in reflection right-angle prism (11) Outside is provided with fire resistant doorsets (13).
2. the laser detector of rotary regenerative air preheater rotor deformation according to claim 1, it is characterised in that:Institute The transmitting pipeline of generating laser (1) laser beam stated, successively including input path passage (3), incident right-angle prism (10), spiral shell Whirlwind screen mechanism (12), dustless passage (14) and dust-free locating pipe (15);By the reflection of rotor flange face (23), laser beam Reflect pipeline includes dust-free locating pipe (15), dustless passage (14), spiral air curtain mechanism (12), reflection right-angle prism successively (11), reflected light path passage (4), into laser pick-off processing sensor (2).
3. the laser detector of rotary regenerative air preheater rotor deformation according to claim 1, it is characterised in that:Institute The outer end that pipeline (9) is swept in the air cooling stated is provided with dustless channel inlet mouthful (16).
4. the laser detector of rotary regenerative air preheater rotor deformation according to claim 1, it is characterised in that:Institute Equipment cabinet (8) outer wall stated is provided with equipment cabinet air inlet (17), equipment cabinet gas outlet (20) and cable interface (18).
5. the laser detector of rotary regenerative air preheater rotor deformation according to claim 1, it is characterised in that:Institute Fine setting jackscrew one (19), the mounting seat of laser pick-off processing sensor (2) are provided with the mounting seat for the generating laser (1) stated On be provided with fine setting jackscrew two (21).
CN201621349332.1U 2016-12-09 2016-12-09 The laser detector of rotary regenerative air preheater rotor deformation Active CN206362311U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621349332.1U CN206362311U (en) 2016-12-09 2016-12-09 The laser detector of rotary regenerative air preheater rotor deformation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621349332.1U CN206362311U (en) 2016-12-09 2016-12-09 The laser detector of rotary regenerative air preheater rotor deformation

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110375652A (en) * 2019-08-28 2019-10-25 合肥工业大学 The long range multiple degrees of freedom laser measurement system of beam stability can be improved
CN112344977A (en) * 2021-01-08 2021-02-09 北京中科同志科技股份有限公司 Sensing and positioning system used in high-temperature furnace chamber

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110375652A (en) * 2019-08-28 2019-10-25 合肥工业大学 The long range multiple degrees of freedom laser measurement system of beam stability can be improved
CN112344977A (en) * 2021-01-08 2021-02-09 北京中科同志科技股份有限公司 Sensing and positioning system used in high-temperature furnace chamber

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