CN105675060A - Flow measurement apparatus of pipe airflow - Google Patents
Flow measurement apparatus of pipe airflow Download PDFInfo
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- CN105675060A CN105675060A CN201610124174.8A CN201610124174A CN105675060A CN 105675060 A CN105675060 A CN 105675060A CN 201610124174 A CN201610124174 A CN 201610124174A CN 105675060 A CN105675060 A CN 105675060A
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- 238000005259 measurement Methods 0.000 title claims abstract description 31
- 230000005291 magnetic effect Effects 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 24
- 239000000428 dust Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 6
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 210000004907 gland Anatomy 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 230000005415 magnetization Effects 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 8
- 239000000843 powder Substances 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract description 7
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 239000000725 suspension Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000005514 two-phase flow Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 13
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 9
- 230000003245 working effect Effects 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005339 levitation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002889 diamagnetic material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000003442 weekly effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
A flow measurement apparatus of pipe airflow is an apparatus for measuring a flow velocity or flow of a pipe gas-solid two-phase flow body or a single-phase high temperature flow body. A fan blade rotor arranged in the middle of a pipe is connected to a wind measurement connection pipe through a rotating shaft. The wind measurement connection pipe is connected to a pipe base flange welded on a pipe wall. The rotating shaft is connected to an upper pipe sleeve and a lower pipe sleeve installed on the wind measurement pipe base. Both ends of the rotating shaft are provided with magnets which fix positions of the rotating shaft and the wind measurement connection pipe through magnetic suspension force. The rotating shaft transmits output signals to a data processor through a rotating speed sensor for processing. The flow measurement apparatus of the pipe airflow uses the flow of a primary airpipe powder mixture to drive the fan blade rotor to rotate, and converts the rotating speed of the fan blade rotor into the wind speed of the pipe. The air output is calculated through a module processor. The piezometric pipe blocking problem in the measurement of the primary pneumatic pressure is avoided, and on-line monitoring of the wind speed or the wind quantity is realized. The apparatus service life is greatly prolonged by using a magnetic suspension technology, a sealing technology which uses high pressure cleaning air, and wear resistant materials.
Description
Technical field
The present invention relates to coal dust gas-particle two-phase fluid flow velocity, flow measurement or single-phase high temperature fluid flow velocity, flow measurement technology.
Background technology
In power boiler burning system, primary air piping wind speed size is the important parameter of power boiler burning adjustment, and primary air velocity is excessive, it is easy to causes boiler combustion unstable, even puts out a fire; Primary air velocity is excessively little, then can cause primary air piping accumulated powder or blocking, even primary air piping scaling loss. For a long time, technician, in order to measure primary air piping wind powder mixture speed, has paid too many effort, therefore, has multiple primary air piping wind powder mixture on-line monitoring technique to be applied in station boiler actual production, and achieves certain effect. But, also there is the defect that some cannot overcome.
In general, gas-solid gas velocity in station boiler First air pipeline mainly makes to measure in two ways, one adopts Pitot tube or backing tube to measure single phase gas dynamic pressure and the parameter such as static pressure, temperature, utilizes Bernoulli equation to calculate wind speed, air quantity and backing tube coefficient; Then, adopting backing tube to measure the flow velocity of gas-particle two-phase fluid or flow, owing to the main conveying thing in boiler First air pipeline is pulverized coal particle, backing tube easily blocks, and causes that primary air piping measuring wind speed error is excessive maybe cannot be measured.
Another kind adopts static charge method to measure, primary air piping is installed two sensors, the distance of two sensors is certain, owing to air-flow exists certain time difference by the ripple that the static charge of two sensor sensings produces, therefore, distance between the cycle of the ripple produced according to two sensors and two sensors, it is possible to calculate air-flow velocity. But, due to gas flow temperature change, cause the coefficient difference for calculated gas flow flow velocity very big, make to measure the flow velocity being difficult to accurately look after differing temps scope, therefore, when temperature variation is little, the gas velocity adopting static charge method to measure can only reflect the variation tendency of fluid velocity, can not really reflect actual flow velocity and the flow of fluid.
Summary of the invention
Technical problem to be solved by this invention is the problem in order to solve above-mentioned proposition, there is provided a kind of in pipeline for the flow velocity of the higher gas-particle two-phase fluid of high-temperature gas or dust concentration or flow measurement device, with adapt to station boiler load and burning coal change, and easy to maintenance, measure chimneying flow measurement device accurately.
Described chimneying flow measurement device, it is characterized in that, comprise wind leaf rotor, rotating shaft, survey wind is taken over, tachogenerator, survey airduct seat and data handler, it is arranged at the wind leaf rotor in the middle part of pipeline to be connected with the tail end of described rotating shaft, rotating shaft outer spacer is provided with surveys wind adapter, the both ends of rotating shaft are connected by bearing or magnetic field with surveying between wind is taken over, survey wind adapter to be fixedly connected with the survey airduct seat of pipe side wall, it is fixed with gland outside the first end of described survey wind adapter, described tachogenerator is connected with rotating shaft, the output terminal of tachogenerator is electrically connected with data handler, for rotating speed being converted to chimneying flow velocity or flow by data handler,
Outer sheath in the survey wind adapter surveyed in airduct seat is equipped with wear-resistant sleeve; Being arranged with pipe box and lower pipe box respectively outside the two ends surveying wind adapter, the inside of described lower pipe box is threaded with survey wind adapter, and the outside of lower pipe box is threaded with wear-resistant sleeve; It is 0.2mm～1mm that the internal diameter of lower pipe box outside narrows down to the gap with rotating shaft gradually, and described end cap is fixedly connected with the outer end of upper pipe box, makes the adapter of described survey wind, lower pipe box, upper pipe box and end cap be encircled into a cavity; The part of described survey wind adapter is located at the outside surveying airduct seat, is provided with high pressure cleaning pneumatic fitting in the survey wind adapter surveying airduct seat outside, for being blown into clean air in described cavity, prevents from surveying in wind adapter by dust or contaminating impurity.
Further, the afterbody permanent sleeve in described rotating shaft is connected to lower interior magnet, and the periphery of lower interior magnet is provided with lower outside magnet by gap, and described lower interior magnet is identical with same one end polarity of described lower outside magnet.
Further, the stem permanent sleeve of described rotating shaft is connected to interior magnet, and the periphery of upper interior magnet is provided with upper outside magnet by gap, and described interior magnet is identical with same one end polarity of described upper outside magnet.
Closer, axis two side clearances of described interior magnet are arranged with lower magnet and upper magnet, be provided with gap between described lower magnet and described upper magnet and rotating shaft, described lower magnet and described upper magnet face to one end of upper interior magnet with faced by upper interior magnet end face polarity identical.
Preferably, gap between gap between gap between described lower interior magnet and described lower outside magnet, described interior magnet and described upper outside magnet, described interior magnet and described upper magnet, and the gap between upper interior magnet and described lower magnet is 2mm～12mm; In lower, magnet, lower outside magnet, upper interior magnet, upper outside magnet, upper magnet and lower magnet are permanent magnet, and residual magnetization is at least 10KGs.
As embodiment, described lower pipe box, wear-resistant sleeve and wind leaf rotor are wear-proof metal ceramic material; Described lower interior magnet, lower outside magnet, upper interior magnet, upper outside magnet, upper magnet and lower magnet are located in magnet cover, and described magnet cover is fixedly connected with survey airduct seat, upper pipe box or lower pipe box.
Preferably, described upper pipe box is connected with the outer surface thread surveying wind adapter, described upper outside magnet is embedded to be surveyed between wind adapter and upper pipe box and is fixed by upper pipe box, upper magnet and lower magnet respectively by upper pipe box with survey the boss of wind adapter protrusion and upper interior magnet outside the magnetic force scolded fix; Lower outside magnet is embedded at lower pipe box and surveys being screwed between taking between wind adapter and by lower pipe box and survey wind.
Further, it is provided with temperature and pressure transmitter between survey wind adapter and wear-resistant sleeve, temperature and pressure transmitter are connected with described data handler by wire, and for Fluid Computation flow, the leeward side opening place of wear-resistant sleeve in airduct inside be located at by described temperature and pressure transmitter; Described tachogenerator is encoder.
A kind of embodiment is that the length of described rotating shaft is 500mm～4000mm; Magnet in the middle part permanent sleeve of described rotating shaft is connected in one or more groups, in magnet periphery by gap be provided with China and foreign countries magnet, in described in magnet identical with same one end polarity of described China and foreign countries magnet.
Present invention achieves the flow of the severe measurement environment that can adapt to high temperature or gas-particle two-phase fluid accurately to measure, and almost do not affect fluid state, maintenance greatly reduces, improve the measuring accuracy surveying wind apparatus simultaneously, greatly extend work-ing life, be conducive to improving boiler combustion security and economy, decreasing pollution thing quantity discharged.
Pipeline Dual-Phrase Distribution of Gas olid body flow velocity of the present invention or flow measurement device are compared with existing air quantity wind speed or apparatus for measuring air quantity, and its outstanding feature is:
1. this survey wind apparatus utilizes primary wind and powder mixture velocity in coal burning system pipeline to drive wind leaf rotor turns, wind leaf rotor speed is changed into wind speed, air quantity and fluid flow rate is calculated by data handler, avoid piezometric tube blockage problem when measuring First air dynamic pressure, achieve primary air piping wind powder mixture gas-particle two-phase fluid flow velocity on-line monitoring first.
2. utilizing magnetic levitation technology, eliminate the axis suffered by rotating shaft and radial force, wind leaf rotor is subject to flow of fluid motivating force and rotates, and drives axis of rotation. First magnetic levitation technology is used for gas-particle two-phase fluid flow rate measuring device, makes rotating shaft except by except air friction power, almost there is no other friction resistance, therefore, significantly decrease the friction resistance of rotating shaft, it is to increase measurement device precision, significantly extend the work-ing life of measuring apparatus.
3. through filtration after high pressure cleaning air enter survey wind apparatus, flow out from the gap between lower pipe box and rotating shaft, device is carried out noncontact sealing, stop the dust of air channel or primary air piping to enter to survey wind apparatus and affect measurement device precision and normal operation so that device can long-term, steady running in serious dust atmosphere.
4. for the larger-size pipeline in cross section, when measuring air-flow velocity, it is not necessary to change pipeline section scantlings of the structure, increase windage, air-flow body flow is little.
5. use permanent magnet instead of electro-magnet as the support of rotating shaft, not only simplify structure, and improve survey wind apparatus to the subject range of temperature, avoid the disadvantageous effect using electro-magnet to cause coil excessive heating to be brought by equipment.
6. measure different from conventional pipeline fluid, make use of encoder and carry out measuring wind speed, it is to increase the measuring accuracy of device, meet service precision requirement.
7. wind leaf rotor, lower pipe box, wear-resistant sleeve all adopt sintering metal to carry out processing or processing, greatly prolongation device work-ing life.
The present invention utilizes the wind powder mixture in primary air piping to flow, drive wind leaf rotor turns, drive the axis of rotation being connected with wind leaf rotor, measure primary air piping gas-particle two-phase fluid flow velocity, and then calculate flow, solve the long-term Measurement accuracy problem of flow of high temperature and high density dust atmosphere; Adopt sintering metal processing wind leaf rotor and wear-resistant sleeve, extend device work-ing life; Introduce high pressure cleaning air to be sealed by device, it is ensured that device normal operation; Utilize the magnetic levitation technology principle of magnet homopolar-repulsion, cancellation element axial force and radial force, less frictional force, it is to increase measuring accuracy. Except station boiler primary air piping wind powder mixture gas-particle two-phase fluid wind speed on-line monitoring, it is can also be applied to secondary air duct air quantity on-line monitoring, medium-speed pulverizer entrance primary air flow on-line monitoring, the monophasic fluid flow velocity of the industries such as cement, metallurgy, petrochemical industry or gas-particle two-phase fluid flow velocity or online discharge monitoring are measured.
Accompanying drawing explanation
Accompanying drawing is present configuration schematic diagram.
In figure: 1 gland, 2 data handlers, 3 tachogenerators, magnet on 4, magnet on 5,6 upper outside magnet, 7 lower magnets, pipe box on 8,9 survey wind pipe connecting flanges, 10 base flanges, 11 rotating shafts, 12 survey airduct seats, 13 wear-resistant sleeves, 14 pipelines, 15 temperature and pressure transmitter, 16 lower outside magnet, 17 times pipe boxes, magnet in 18 times, 19 wind leaf rotors, 20 survey wind adapters, 21 high pressure cleaning pneumatic fittings, magnet in 22,23 China and foreign countries' magnet.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described: chimneying flow measurement device as shown in the figure, comprises wind leaf rotor 19, rotating shaft 11, survey wind adapter 20, tachogenerator 3, surveys airduct seat 12 and data handler 2.
Wherein encoder selected by tachogenerator 3, rotation angle can be changed into pulse and export by encoder, encoder accuracy according to different model, exportable 360～2400 pulses weekly, data handler 2 can use PLC, micro-chip or DSP, and the output signal of encoder can directly access data handler or DCS Controlling System.
Wind leaf rotor 19 is provided with three semicircle bowls swayed or three wind leaves, the center of circle of semicircle bowl or the medullary ray of wind leaf are arranged at pipeline axis, wind leaf rotor 19 adopts sintering metal, its central shaft is fixedly connected with the tail end of described rotating shaft 11, rotating shaft 11 outer spacer is provided with surveys wind adapter 20, the both ends of rotating shaft 11 are connected by bearing or magnet with surveying between wind is taken over, if using bearing, need to select expensive wear-resisting stone bearing.
As shown in the figure, the side of pipeline 14 is provided with the survey airduct seat 12 of the cylindricality with pipeline communication, the outer end surveying airduct seat is provided with base flange 10, by surveying, wind pipe connecting flange 9 is tightly connected base flange 10, wind adapter 20 is welded as a whole with surveying to survey wind pipe connecting flange 9, and survey wind pipe connecting flange is positioned on the axis surveying wind adapter. Use survey airduct seat that survey wind apparatus is installed not need to change pipeline form, chimneying is not had a significant effect. Theoretical proving with testing data, the rotating speed of axle is directly proportional with the wind speed of driving wind leaf rotor turns, therefore, by wind1 tunnel trial or demarcate the rotating speed of shaft and the relation coefficient of wind speed on the spot, so that it may with Measurement accuracy measured medium flow velocity.
The wind leaf rotor-type of technical solution of the present invention tests the speed and proposes first in high temperature or gas-particle two-phase fluid pipeline and apply, although in the clean air ambient of the low wind speed of normal temperature, wind leaf rotor connection rotating shaft can be used for measuring wind, but cannot make to measure fluid velocity in this way in the gas-particle two-phase fluid environment that dust concentration is higher at all, especially in the pipeline of coal dust air-transport system, pipe flow speed can up to 40m/s, or amass very big secondary air duct (the long 3-5m in air channel at pipeline section, wide 8-10m), according to uniform cross section method, need that multiple survey wind apparatus is installed and can accurately measure flow field velocity, make shaft length more than 500mm, even reach 4m, therefore for the gas-particle two-phase fluid pipeline that dust concentration is high, especially surveying wind speed in coal dust Pneumatic conveying pipeline needs the problems faced to be:
1. the bearing of supporting revolving shaft cannot use in the environment of heavy dust, and bearing is very easily worn;
2., owing to shaft length is excessively long so that rotating shaft weight is relatively big, axially big with radial shaft strength, bearing easily damages;
3., due to wind speed height, the abrasion of bearing long time continuous working is big, consumes excessive;
4. rotating shaft is excessively long so that rotating shaft easily bends, and especially at high speed, the diameter run-out of rotating shaft is very big, and the impact of bearing is excessive;
Even if 5. being sealed by device, long-time dust piles up the abrasion that can cause too and rotate obstacle and rotating shaft near rotating shaft;
6. in pipeline, air-flow velocity is big, and temperature height, dust concentration height, to the serious wear of device.
For solving the problem, the present invention program have employed following scheme:
Outer sheath in the survey wind adapter 20 surveyed in airduct seat 12 is equipped with wear-resistant sleeve 13, the gap between rotating shaft and wear-resistant sleeve 13 is covered with running casing 17 at the tail end surveying wind adapter 20, running casing 17 and wear-resistant sleeve 13 are by being screwed, rotating shaft 11 is owing to working in rotary state, and running casing 17 needs to leave gap between rotating shaft 11.Such as figure, wear-resistant sleeve 13 is fixedly connected with survey wind pipe connecting flange 9, and it is wind leaf rotor 19 that rotating shaft tail end stretches out cased part. Rotating shaft 11 and survey wind adapter 20 are substantially isolated by wind leaf rotor 19, running casing 17 and wear-resistant sleeve 13 with air-flow in pipeline, and as shown in the figure, the inside of described lower pipe box 17 is threaded with survey wind adapter 20, and the outside of lower pipe box 17 is threaded with wear-resistant sleeve 13; It is 0.5mm that the internal diameter of lower pipe box 17 outside narrows down to the gap with rotating shaft 11 gradually. And wind leaf rotor 19, running casing 17 and wear-resistant sleeve 13 use wear-proof metal ceramic material, survey wind apparatus is made to have possessed wear Protection performance.
Upper sleeve pipe 8 is connected with the upper end outside screw surveying wind adapter 20, and described end cap 1 is fixedly connected with the outer end of upper pipe box 18, makes described survey wind adapter 20, lower pipe box 17, upper pipe box 8 and end cap 1 be encircled into a cavity; The part of described survey wind adapter 20 is located at the outside surveying airduct seat 12, is provided with high pressure cleaning pneumatic fitting 21 in the survey wind adapter 20 surveying airduct seat 12 outside, for inputting clean air in described cavity, prevents from surveying in wind adapter 20 by dust or contaminating impurity. Therefore the effect that gap between running casing 17 and rotating shaft 11 is subject in cavity malleation, makes pipeline gas invade in cavity, thus maintains the Working environment of the cleaning in cavity and device.
In order to reduce the abrasion of rotating shaft as far as possible, extend work-ing life, embodiment eliminates the use of bearing, afterbody permanent sleeve in described rotating shaft 11 is connected to lower interior magnet 18, in lower, the periphery of magnet 18 is provided with lower outside magnet 16 by gap, described lower interior magnet 18 is identical with same one end polarity of described lower outside magnet 16, and coaxial with rotating shaft 11. The stem permanent sleeve of described rotating shaft 11 is connected to interior magnet 5, and the periphery of upper interior magnet 5 is provided with upper outside magnet 6 by gap, and described interior magnet 5 is identical with same one end polarity of described upper outside magnet 6, and coaxial with rotating shaft 11. Axis two side clearances of described interior magnet 5 are arranged with lower magnet 7 and upper magnet 4, it is provided with gap between described lower magnet 7 and described upper magnet 4 and rotating shaft, described lower magnet 7 and described upper magnet 4 in the face of one end of upper interior magnet 5 with faced by upper interior magnet end face polarity identical, and coaxial with rotating shaft 11.
Gap between gap between gap between described lower interior magnet and described lower outside magnet, described interior magnet and described upper outside magnet, described interior magnet and described upper magnet, and the gap between upper interior magnet and described lower magnet is 2-10mm. The length of interior magnet is short can make it easy to installation operation, is in suspended state completely within the scope of the magnetic force of interior magnet surrounding magnet outside.
In lower, magnet, lower outside magnet, upper interior magnet, upper outside magnet, upper magnet and lower magnet all use permanent magnet, and the residual magnetization of magnet is at least 10KGs. Permanent magnet avoids the heating increasing the weight of equipment, and simplifies the structure. Owing to shaft length is big, weight is big, and the surging force when high-speed rotation is big, it is necessary to magnet has enough strong magnetic force and supports.
Use magnetic levitation technology, rotating shaft is suspended, thoroughly avoid contact abrasion, it also avoid the diameter run-out impact that rotating shaft high speed rotating brings, thus greatly extend the work-ing life making device.
In order to avoid, rotating shaft is excessively long causes the stage casing radial direction of rotating shaft to be rocked, one or more axial magnetic point of suppon can be set in the stage casing of rotating shaft, magnet 22 in the middle part permanent sleeve of described rotating shaft is connected to, in in magnet periphery by gap be provided with China and foreign countries magnet 23, in described in magnet identical with same one end polarity of described China and foreign countries magnet.
A vital role of running casing and upper sleeve pipe is the installation facilitating magnet, owing to permanent magnet is difficult to processing, in such as graph structure, described upper pipe box 8 is connected with the outer surface thread surveying wind adapter 20, described upper outside magnet 6 is embedded between survey wind adapter and upper pipe box and is fixed by upper pipe box, and upper magnet 4 and lower magnet 7 are taken over outside the boss and upper interior magnet that protrude, with survey wind, the magnetic force scolded by upper pipe box respectively and fixed; Lower outside magnet 16 is embedded at lower pipe box 17 and surveys being screwed between taking between wind adapter 20 and by lower pipe box and survey wind.
The embodiment of another kind of magnet installation is, described lower interior magnet, lower outside magnet, upper interior magnet, upper outside magnet, upper magnet and lower magnet are located in the magnet cover of diamagnetic material, magnet cover is easy to processing, and described magnet cover is fixedly connected with survey airduct seat, upper pipe box or lower pipe box. Magnet is placed in maintenance easy to clean and replacing in magnet cover.
For the ease of measuring mass rate and the volumetric flow rate of fluid, need the air pressure in measurement pipeline and temperature, it is provided with temperature and pressure transmitter 15 between survey wind adapter and wear-resistant sleeve, the leeward side opening place of wear-resistant sleeve in airduct inside be located at by described temperature and pressure transmitter 15, and by being connected to data handler at the wire surveyed between wind adapter and wear-resistant sleeve. Make sensor can measure the direct data of temperature and pressure first in pipeline when being subject to protecting.
Claims (9)
1. a chimneying flow measurement device, it is characterized in that, comprise wind leaf rotor (19), rotating shaft (11), survey wind adapter (20), tachogenerator (3), survey airduct seat (12) and data handler (2), it is arranged at wind leaf rotor (19) in the middle part of pipeline to be connected with the tail end of described rotating shaft (11), rotating shaft outer spacer is provided with surveys wind adapter (20), the both ends of rotating shaft are connected by bearing or magnetic field with surveying between wind is taken over, survey wind adapter to be fixedly connected with survey airduct seat (12) of pipe side wall, it is fixed with gland (1) outside the first end of described survey wind adapter, described tachogenerator (3) is connected with rotating shaft, the output terminal of tachogenerator is electrically connected with data handler (2), for rotating speed being converted to chimneying flow velocity or flow by data handler,
Outer sheath in the survey wind adapter surveyed in airduct seat is equipped with wear-resistant sleeve (13); Being arranged with pipe box (8) and lower pipe box (17) respectively outside the two ends surveying wind adapter, the inside of described lower pipe box is threaded with survey wind adapter, and the outside of lower pipe box is threaded with wear-resistant sleeve; It is 0.2mm～1mm that the internal diameter of lower pipe box outside narrows down to the gap with rotating shaft gradually, and described end cap (1) is fixedly connected with the outer end of upper pipe box, makes the adapter of described survey wind, lower pipe box, upper pipe box and end cap be encircled into a cavity; The part of described survey wind adapter is located at the outside surveying airduct seat (12), it is provided with high pressure cleaning pneumatic fitting (21) in the survey wind adapter surveying airduct seat outside, for being blown into clean air in described cavity, prevent from surveying in wind adapter by dust or contaminating impurity.
2. chimneying flow measurement device according to claim 1, it is characterized in that: the afterbody permanent sleeve in described rotating shaft is connected to lower interior magnet (18), in lower, the periphery of magnet is provided with lower outside magnet (16) by gap, and described lower interior magnet (18) is identical with same one end polarity of described lower outside magnet (16).
3. chimneying flow measurement device according to claim 1 and 2, it is characterized in that: the stem permanent sleeve of described rotating shaft is connected to interior magnet (5), in upper, the periphery of magnet is provided with upper outside magnet (6) by gap, and described interior magnet (5) is identical with same one end polarity of described upper outside magnet (6).
4. chimneying flow measurement device according to claim 3, it is characterized in that: axis two side clearances of described interior magnet (5) are arranged with lower magnet (7) and upper magnet (4), be provided with gap between described lower magnet (7) and described upper magnet (4) and rotating shaft, described lower magnet (7) and described upper magnet (4) in the face of one end of upper interior magnet (5) with faced by upper interior magnet end face polarity identical.
5. chimneying flow measurement device according to claim 4, it is characterized in that: the gap between the gap between the gap between described lower interior magnet and described lower outside magnet, described interior magnet and described upper outside magnet, described interior magnet and described upper magnet, and the gap between upper interior magnet and described lower magnet is 2mm～12mm; In lower, magnet, lower outside magnet, upper interior magnet, upper outside magnet, upper magnet and lower magnet are permanent magnet, and residual magnetization is at least 10KGs.
6. chimneying flow measurement device according to claim 4 or 5, it is characterised in that: described lower pipe box, wear-resistant sleeve and wind leaf rotor (19) they are wear-proof metal ceramic material; Described lower interior magnet, lower outside magnet, upper interior magnet, upper outside magnet, upper magnet and lower magnet are located in magnet cover, and described magnet cover is fixedly connected with survey airduct seat, upper pipe box or lower pipe box.
7. chimneying flow measurement device according to claim 4 or 5, it is characterized in that: described upper pipe box (8) is connected with the outer surface thread surveying wind adapter (20), described upper outside magnet (6) is embedded between survey wind adapter and upper pipe box and is fixed by upper pipe box, and upper magnet (4) and lower magnet (7) are taken over outside the boss and upper interior magnet that protrude, with survey wind, the magnetic force scolded by upper pipe box respectively and fixed; Lower outside magnet (16) is embedded at lower pipe box (17) and surveys being screwed between taking between wind adapter (20) and by lower pipe box and survey wind.
8. chimneying flow measurement device according to claim 1, it is characterized in that: between survey wind adapter and wear-resistant sleeve, be provided with temperature and pressure transmitter (15), temperature and pressure transmitter are connected with described data handler by wire, for Fluid Computation flow, the leeward side opening place of wear-resistant sleeve in airduct inside be located at by described temperature and pressure transmitter (15); Described tachogenerator is encoder.
9. chimneying flow measurement device according to claim 1, it is characterised in that: the length of described rotating shaft is 500mm～4000mm; Magnet (22) in the middle part permanent sleeve of described rotating shaft is connected in one or more groups, in magnet periphery by gap be provided with China and foreign countries magnet (23), in described in magnet identical with same one end polarity of described China and foreign countries magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610124174.8A CN105675060B (en) | 2016-03-04 | 2016-03-04 | A kind of chimneying flow measurement device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610124174.8A CN105675060B (en) | 2016-03-04 | 2016-03-04 | A kind of chimneying flow measurement device |
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| Publication Number | Publication Date |
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| CN105675060A true CN105675060A (en) | 2016-06-15 |
| CN105675060B CN105675060B (en) | 2018-01-19 |
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| CN201610124174.8A Expired - Fee Related CN105675060B (en) | 2016-03-04 | 2016-03-04 | A kind of chimneying flow measurement device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680765A (en) * | 2018-05-16 | 2018-10-19 | 英华达（上海）科技有限公司 | Flow velocity sensing device further and flow velocity sensing system |
| CN114563132A (en) * | 2022-02-09 | 2022-05-31 | 熊钦龙 | Device for detecting leakproofness of building material waterproof pipe |
| CN115523971A (en) * | 2022-11-04 | 2022-12-27 | 四川瑞吉绿能科技有限公司 | Pivot device for measuring flow of carbon-containing gas and flow measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108680765A (en) * | 2018-05-16 | 2018-10-19 | 英华达（上海）科技有限公司 | Flow velocity sensing device further and flow velocity sensing system |
| CN108680765B (en) * | 2018-05-16 | 2020-07-28 | 英华达（上海）科技有限公司 | Flow velocity sensing device and flow velocity sensing system |
| CN114563132A (en) * | 2022-02-09 | 2022-05-31 | 熊钦龙 | Device for detecting leakproofness of building material waterproof pipe |
| CN115523971A (en) * | 2022-11-04 | 2022-12-27 | 四川瑞吉绿能科技有限公司 | Pivot device for measuring flow of carbon-containing gas and flow measuring device |
| CN115523971B (en) * | 2022-11-04 | 2023-02-28 | 四川瑞吉绿能科技有限公司 | Pivot device for measuring flow of carbon-containing gas and flow measuring device |
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|---|---|
| CN105675060B (en) | 2018-01-19 |
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