CN102706395B - Equivalent-drop height powder impulse flowmeter - Google Patents
Equivalent-drop height powder impulse flowmeter Download PDFInfo
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- CN102706395B CN102706395B CN2012102178423A CN201210217842A CN102706395B CN 102706395 B CN102706395 B CN 102706395B CN 2012102178423 A CN2012102178423 A CN 2012102178423A CN 201210217842 A CN201210217842 A CN 201210217842A CN 102706395 B CN102706395 B CN 102706395B
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Abstract
The invention relates to an equivalent-drop height powder impulse flowmeter. The equivalent-drop height powder impulse flowmeter is characterized in that the upper part of a shell of the equivalent-drop height powder impulse flowmeter is provided with a herringbone material guide pipe; the shell is internally provided with a feeder, an equivalent-drop height discharger and a material supporting plate from top to bottom, the feeder is a multi-blade rotating feeder, and multiple blades of the multi-blade rotating feeder are fixed on a rotating shaft by being arrayed at intervals in a conical shape; the equivalent-drop height discharger is composed of a discharging chute and a truncated conical drum positioned in the middle of the discharging chute, the conicity of the truncated conical drum is the same as the array conicity of the blades of the multi-blade rotating feeder, and a group of small discharge holes are respectively arranged in two sector areas which are perpendicular to the central connection line direction of two discharge ports of the herringbone material guide pipe; the material supporting plate is formed into a conical material supporting plate and arranged just below the truncated conical drum through a pressure sensor assembly, the conicity of the conical material supporting plate is the same as that of the truncated conical drum, and central lines of the two conical structures are coincided; and perpendicular discharging heights from the centers of all small discharge holes positioned on the truncated conical drum to the conical material supporting plate are equivalent. The invention solves the problem of low metering accuracy of an impact plate flowmeter.
Description
Technical field
The present invention relates to powder material dynamic measurement utensil, specifically a kind of drop powder impulse flowmeter that waits.
Background technology
At present, in the continuous dynamic measurement of powder, use the equipment of impulse flowmeter to be impact flow meter both at home and abroad.It with respect to adhesive tape claim, screw feed scale, ring-type scraper plate weighing-appliance have characteristics simple in structure, that closure good, easy for installation, cost is low.But impact flow meter changes along with different material flows due to blanking height and check-out console center of effort and is restive, simultaneously material enter the initial velocity of impact flow meter can not be constant, this flowmeter is actually by the mode of specific material experimental calibration and measures.Therefore impact flow meter existence output metering signal is unstable, measuring accuracy is not high, the problem that environmental suitability is poor.The impact flow meter full accuracy that present Siemens, Switzerland start production is 1%.Therefore can't use at the demanding industry spot impact flow meter of measuring accuracy.
Summary of the invention:
The present invention is intended to solve the problems referred to above that existing powder material dynamic measurement utensil exists, and provide that a kind of structure is relatively simple, easy for installation, metering accurately, adapt to the material properties scope large etc. drop powder impulse flowmeter.
The technical scheme that the present invention solves its technical matters employing is:
A kind of drop powder impulse flowmeter that waits, comprise housing, passage, stock supporting plate, pressure sensor assembly, described housing top is equipped with one and is advanced scene 2 and be the passage of herringbone structure, enclosure interior be provided with from top to bottom feed appliance, etc. drop feeder, stock supporting plate, the housing tip exterior is equipped with reducing motor, the output shaft of this reducing motor extend into enclosure interior by the case top center, the multiple-blade rotary disc feeder is housed on this output shaft, and a plurality of blades of described multiple-blade rotary disc feeder are spaced and are fixed on output shaft by taper shape; The described drop feeder that waits consists of the charging conduit truncated cones cylinder middle with being positioned at charging conduit, the tapering of this truncated cones cylinder is identical with the blades arrangement tapering of described feed appliance, and at two sector regions perpendicular to passage two blanking port center line connecting directions, has one group of discharging aperture; Described stock supporting plate is the taper stock supporting plate, its by pressure sensor assembly install described truncated cones cylinder under, the tapering of this taper stock supporting plate is identical with this truncated cones cylinder tapering, the center line of two pyramidal structures overlaps, and makes all the discharging aperture centers in truncated cones cylinder sector region equal to the vertical blanking height of taper stock supporting plate.
Further: the blade of described feed appliance is symmetrical arranged four, and the relative truncated cones cylinder of each front side of vane cylindrical tangent line is the 40o angle, and the low coverage gap of each blade and the truncated cones cylinder conical surface is 6-8mm.
The described charging conduit of drop feeder that waits is turbination, and upper limb and the housing of groove are connected as a single entity, and the lower edge of groove and truncated cones cylinder bottom outer rim are connected as a single entity, and the longitudinal profile of charging conduit and truncated cones cylinder assembly is the W type.
Described pressure sensor assembly is positioned at the below of taper stock supporting plate, formed by stressed support bar, pressure transducer, bearing and the sealing that is flexible coupling, the vertex of a cone bottom centre of this its upper end of stressed support bar and taper stock supporting plate is affixed, its lower end is connected with pressure transducer, this pressure transducer is arranged on universal adjustable supporter by its bearing, this universal adjustable supporter is arranged on housing, is tightly connected by being flexible coupling between described bearing and taper stock supporting plate.
Compared with prior art, the present invention has following advantage:
1. can carry out the continuous precise metering to powder material.Because the present invention can make powder material by before the discharging aperture of truncated cones cylinder, the initial velocity that material is flowed downward is controlled to be zero, makes simultaneously all the discharging aperture centers in truncated cones cylinder sector region highly equal to the vertical blanking of taper stock supporting plate.Therefore fundamentally solved the not high problem of impact flow meter measuring accuracy, its measuring accuracy can reach 0.2% grade.
2. gageable material scope is large, comprises that granularity is divided in all kinds of ore deposits of 0-2 millimeters, the various powder materials of cement slurry, cement clinker powder, coal dust, flyash, flour etc.
3. good stability., because metering of the present invention is to drive the rotation of leafy feed appliance by reducing motor, force raw material was pressed discharging aperture on the truncated cones cylinder.Therefore stable, the putty not of material stream, stable output signal.
Description of drawings:
Fig. 1 is embodiment of the present invention structural representation.
Fig. 2 is principle of the invention schematic diagram.
Fig. 3 is the blade arrangement schematic diagram of feed appliance.
In figure: the 1-passage; The 2-reducing motor; The 3-output shaft; The 4-blade; The 5-seal flange; The 6-charging conduit; 7-truncated cones cylinder; 8-discharging aperture; The 9-housing; 10-taper stock supporting plate; The stressed support bar of 11-; The 12-pressure transducer; 13-pressure transducer bearing; The 14-sealing that is flexible coupling; The universal adjustable supporter of 15-.
Embodiment:
Below in conjunction with embodiment in detail the present invention is described in detail, purpose only is to understand better content of the present invention.Therefore, the cited case does not limit the scope of the invention.
Referring to Fig. 1, top a cylindrical housings 9, by seal flange 5, a passage that is herringbone structure 1 with a charging aperture, two blanking ports is housed, these housing 9 tip exterior are equipped with reducing motor 2, the output shaft 3 of this reducing motor 2 extend into housing 9 inside by housing 9 top center, be equipped with and be arranged in conical blade 4 on this output shaft 3, thereby form multiple-blade rotary disc feeder of the present invention.
In cylindrical housings 9 inside, the below of described feed appliance such as is equipped with at the drop feeder, this drop feeder consists of charging conduit 6 and the truncated cones cylinders 7 that are positioned at charging conduit 6 centres, the tapering of this truncated cones cylinder 7 is identical with the blade of described feed appliance 4 arrangement taperings, and at two sector regions perpendicular to 1 liang of blanking port center line connecting direction of passage, has one group of discharging aperture 8.
In cylindrical housings 9 inside, taper stock supporting plate 10 is equipped with in the described drop feeder below of waiting, this taper stock supporting plate 10 be positioned at truncated cones cylinder 7 under, its tapering is identical with the tapering of this truncated cones cylinder 7, the center line of two pyramidal structures overlaps, and makes all discharging aperture 8 centers in truncated cones cylinder 7 sector regions equal to the vertical blanking height of taper stock supporting plate 10.
As preferred version, the blade 4 of described feed appliance is symmetrical arranged four, and each blade 4 relative truncated cones cylinder 7 cylindrical tangent line of workplace is the 40o angle, and each blade 4 is that 6-8mm(is referring to Fig. 3 with the low coverage gap of truncated cones cylinder 7 conical surfaces).
As preferred version, the described charging conduit 6 of drop feeder that waits is turbination, and the upper limb of groove and housing 9 are connected as a single entity, and the lower edge of groove and truncated cones cylinder 7 bottom outer rims are connected as a single entity, and charging conduit 6 is the W type with the longitudinal profile of truncated cones cylinder 7 assemblys.
As preferred version, described pressure sensor assembly is positioned at the below of taper stock supporting plate 10, formed by stressed support bar 11, pressure transducer 12, bearing 13 and the sealing 14 that is flexible coupling, the vertex of a cone bottom centre of these stressed support bar 11 its upper ends and taper stock supporting plate 10 is affixed, its lower end is connected with pressure transducer 12, this pressure transducer 12 is arranged on universal adjustable supporter 15 by its bearing 13, this universal adjustable supporter 15 is arranged on housing 9, is connected by the sealing 14 that is flexible coupling between described bearing 13 and taper stock supporting plate 10.When material dropped on taper stock supporting plate 10, the suffered pressure of taper stock supporting plate 10 directly acted on pressure transducer 12 by stressed support bar 11.The sealing 14 that is flexible coupling can form sealing to pressure transducer 12, prevents that material from entering pressure transducer 12 zones.
Referring to Fig. 2, the material that is measured flows into the charging conduit 6 of housing 9 inside by herringbone passage 1, when reducing motor 2 rotates by its output shaft 3 band moving vanes 4, soon material is pushed the discharging aperture 8 on truncated cones cylinder 7 to, the material speed that flows into charging conduit 6 this moment is controlled, and its initial velocity vertically downward of material that is flowed out by discharging aperture 8 is zero (V
0=0).The tapering of taper stock supporting plate 10 is identical with truncated cones cylinder 7 taperings, makes all interior discharging aperture 8 centers of truncated cones cylinder 7 sector regions highly equate (H to the vertical blanking of taper stock supporting plate
1=H
2).Speed while making like this set of each particle of material that is measured fall taper stock supporting plate 10 equates (in short distance, air resistance can be ignored the impact of material falling speed).System of particles momentum while therefore falling taper stock supporting plate 10: (in formula: m is the material point mass to ρ=∑ mv=∑ mgh, and g is acceleration of gravity, and h is the vertical blanking height of discharging aperture 8 centers to taper stock supporting plate 10.), according to theorem of momentum:
(in formula: t is the action time of material on taper stock supporting plate 10, and F is the acting force of material at taper stock supporting plate 10).Act on the momentum of taper stock supporting plate 10:
Therefore can find out, be all the quality of material of whereabouts and the linear function of fall time by material instantaneous delivery and the integrated flux that waits drop powder impulse flowmeter.Detect making a concerted effort and converting corresponding electric signal to of this vertical stress component, can realize demonstration and the integrating of flow.
Above-mentioned feeder such as drop such as grade is vitals of the present invention, and its function is the resident material that is measured and the velocity reversal that changes streams, and making streams initial velocity vertically downward is zero.All discharging aperture 8 centers that are distributed in simultaneously in truncated cones cylinder 7 sector regions are highly equal to the vertical blanking of taper stock supporting plate 10, realized the drop that waits when material falls.Truncated cones cylinder 7 adopts abrasion-resistant stee to make, and the variation that the material abrasion causes its physical dimension can not affect measuring accuracy for a long time.Therefore the output signal drift is minimum.
Above-mentioned multiple-blade rotary disc feeder is another vitals of the present invention, its function is discharging aperture 8 blankings that the drop feeder such as material pushed during with moving vane 4 rotation when reducing motor 2, when multiple-blade rotary disc feeder rotational speed changes, load changes thereupon within the specific limits, the rotating speed of reducing motor 2 is subjected in electric-control system the flow signal that PLC records and sets the flow fiducial value by Frequency Converter Control simultaneously, and then the control discharge quantity is close with the setting flow.Blade 4 adopts abrasion-resistant stee to make, and while guaranteeing long-term the use, wear extent is little.The relative truncated cones cylinder 7 cylindrical tangent lines of blade 4 are the 40o angle and are conducive to feeding and pusher.Blade 4 sections have enough bending strengths and guarantee and suitably still can work after wearing and tearing.
Above-mentioned taper stock supporting plate 10 is also vitals of the present invention, the tapering of taper stock supporting plate 10 is identical with truncated cones cylinder 7 taperings that wait the drop feeder, its objective is that all discharging aperture 8 centers that make in truncated cones cylinder 7 sector regions are equal to the vertical blanking height h of taper stock supporting plate 10.Speed while making like this set of each particle of material that is measured fall taper stock supporting plate 10 equates.Taper stock supporting plate 10 adopts abrasion-resistant stees to make, and can bear long-term material abrasion, but when tested material has the property of attaching taper stock supporting plate 10 surface coating wear-resistant unsticky coatings.
Above-mentioned pressure sensor assembly and taper stock supporting plate 10 and with universal adjustable supporter 15 syndetons, further perfect technical solution of the present invention.Pressure sensor assembly can accurately be measured material and fall to the impulse force of taper stock supporting plate 10; Universal adjustable supporter 15 can fine adjustment and fixing taper stock supporting plate 10, and taper stock supporting plate 10 center lines are overlapped with truncated cones cylinder 7 center lines, makes up the error that causes due to manufacturing, installation.
The invention process said structure, fundamentally changed original technology discharging, bearing material test format, really realized utilizing impulse principle the metering material to be carried out the detection metering of instantaneous flow, semi-invariant.
Claims (4)
1. one kind is waited drop powder impulse flowmeter, comprise housing, passage, stock supporting plate, pressure sensor assembly, it is characterized in that, described housing top is equipped with one and is advanced scene 2 and be the passage of herringbone structure, enclosure interior is provided with feed appliance from top to bottom, Deng the drop feeder, stock supporting plate, the housing tip exterior is equipped with reducing motor, the output shaft of this reducing motor extend into enclosure interior by the case top center, the multiple-blade rotary disc feeder is housed on this output shaft, a plurality of blades of described multiple-blade rotary disc feeder are spaced and are fixed on output shaft by taper shape, the described drop feeder that waits consists of the charging conduit truncated cones cylinder middle with being positioned at charging conduit, the tapering of this truncated cones cylinder is identical with the blades arrangement tapering of described feed appliance, and at two sector regions perpendicular to passage two blanking port center line connecting directions, has one group of discharging aperture, described stock supporting plate is the taper stock supporting plate, its by pressure sensor assembly be arranged on described truncated cones cylinder under, the tapering of this taper stock supporting plate is identical with this truncated cones cylinder tapering, the center line of two pyramidal structures overlaps, and makes all the discharging aperture centers in truncated cones cylinder sector region equal to the vertical blanking height of taper stock supporting plate.
2. wait as claimed in claim 1 drop powder impulse flowmeter, it is characterized in that, the blade of described feed appliance is symmetrical arranged four, and the relative truncated cones cylinder of each front side of vane cylindrical tangent line is the 40o angle, and the low coverage gap of each blade and the truncated cones cylinder conical surface is 6-8mm.
3. wait as claimed in claim 1 drop powder impulse flowmeter, it is characterized in that, the described charging conduit of drop feeder that waits is turbination, upper limb and the housing of groove are connected as a single entity, the lower edge of groove and truncated cones cylinder bottom outer rim are connected as a single entity, and the longitudinal profile of charging conduit and truncated cones cylinder assembly is the W type.
4. wait as claimed in claim 1 drop powder impulse flowmeter, it is characterized in that, described pressure sensor assembly is positioned at the below of taper stock supporting plate, formed by stressed support bar, pressure transducer, bearing and the sealing that is flexible coupling, the vertex of a cone bottom centre of this its upper end of stressed support bar and taper stock supporting plate is affixed, its lower end is connected with pressure transducer, this pressure transducer is arranged on universal adjustable supporter by its bearing, this universal adjustable supporter is arranged on housing, is tightly connected by being flexible coupling between described bearing and taper stock supporting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102178423A CN102706395B (en) | 2012-06-28 | 2012-06-28 | Equivalent-drop height powder impulse flowmeter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102178423A CN102706395B (en) | 2012-06-28 | 2012-06-28 | Equivalent-drop height powder impulse flowmeter |
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| CN102706395A CN102706395A (en) | 2012-10-03 |
| CN102706395B true CN102706395B (en) | 2013-11-13 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3939709A (en) * | 1974-02-04 | 1976-02-24 | Consolidation Coal Company | Apparatus for measuring the flowrate of particulate solid material |
| US5895865A (en) * | 1997-09-18 | 1999-04-20 | Ozawa; Kenneth Y. | Particulate material flow measuring device |
| CN101387535A (en) * | 2008-10-31 | 2009-03-18 | 镇江华晨华通路面机械有限公司（中外合资） | Powder volumetric measuring device |
| CN102183287A (en) * | 2011-03-29 | 2011-09-14 | 河南丰博自动化有限公司 | Weightlessness-principle-based powdery material continuous metering control method and device thereof |
-
2012
- 2012-06-28 CN CN2012102178423A patent/CN102706395B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3939709A (en) * | 1974-02-04 | 1976-02-24 | Consolidation Coal Company | Apparatus for measuring the flowrate of particulate solid material |
| US5895865A (en) * | 1997-09-18 | 1999-04-20 | Ozawa; Kenneth Y. | Particulate material flow measuring device |
| CN101387535A (en) * | 2008-10-31 | 2009-03-18 | 镇江华晨华通路面机械有限公司（中外合资） | Powder volumetric measuring device |
| CN102183287A (en) * | 2011-03-29 | 2011-09-14 | 河南丰博自动化有限公司 | Weightlessness-principle-based powdery material continuous metering control method and device thereof |
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| CN102706395A (en) | 2012-10-03 |
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