DK171128B1 - Device for spreading powdered material in an air stream - Google Patents
Device for spreading powdered material in an air stream Download PDFInfo
- Publication number
- DK171128B1 DK171128B1 DK040592A DK40592A DK171128B1 DK 171128 B1 DK171128 B1 DK 171128B1 DK 040592 A DK040592 A DK 040592A DK 40592 A DK40592 A DK 40592A DK 171128 B1 DK171128 B1 DK 171128B1
- Authority
- DK
- Denmark
- Prior art keywords
- spreading
- plates
- plate
- feeder tube
- tube
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
- B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
- B07B4/025—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall the material being slingered or fled out horizontally before falling, e.g. by dispersing elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/06—Feeding or discharging arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/16—Gas pressure systems operating with fluidisation of the materials
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Nozzles (AREA)
Description
i DK 171128 B1in DK 171128 B1
Den foreliggende opfindelse angår en indretning til udspredning af pulverformet materiale i en luftstrøm, hvilken indretning omfatter et føderør og et spredeorgan.The present invention relates to a device for spreading powdered material in an air stream comprising a feeder tube and a spreading means.
5 Indretninger af denne art kendes fra GB patentskrifterne nr. 767.895 og nr. 953.690 og US patentskrifterne nr. 177.242 og nr. 2.766.880.Devices of this kind are known from GB patents 767,895 and 953,690 and US patents 177,242 and 2,766,880.
I fig. 1 er der vist et eksempel på en yderligere kendt 10 indretning, der eksempelvis anvendes til udspredning af cement i en luftstrøm, som transporterer materialet til en separator. Denne kendte indretning omfatter et lodret føderør 1 for tilførsel af det pulverformede materiale til en spredeplade 3, der er anbragt for enden af føderøret og 15 vinkelret på dettes akse, og som rotationssymmetrisk spreder materialet inden i et omgivende rør 5, i hvilket en opadgående luftstrøm gennemblæser og dispergerer det fra pladen 3 udspredte materiale og transporterer materialet videre til separatoren.In FIG. 1, there is shown an example of a further known device used, for example, for spreading cement in an air stream which transports the material to a separator. This known device comprises a vertical feeder tube 1 for supplying the powdered material to a spreading plate 3 disposed at the end of the feeder tube and perpendicular to its axis, and which rotates symmetrically within the surrounding tube 5, in which an upward flow of air blows and disperses the material dispersed from the plate 3 and transports the material to the separator.
2020
Materialet strømmer sidevært ud fra spredepladen med en mere eller mindre given hastighed, hvilket medfører, at lagtykkelsen ved spredepladens kant vokser med voksende mængde tilført materiale. Når tykkelsen af det udkastede 25 materialelag bliver for stor, kan der opstå problemer med, at luften ikke kan gennemblæse og dispergere materialelaget, så at materialekoncentrationer rammer væggen af det omgivende rør eller eventuelt falder ned gennem røret uden at blive suspenderet og videretransporteret af luften.The material laterally flows out from the spreading plate at a more or less given rate, which causes the layer thickness at the edge of the spreading plate to increase with increasing amount of feed material. When the thickness of the ejected material layer becomes too large, problems can occur that the air cannot blow through and disperse the material layer so that material concentrations hit the wall of the surrounding tube or possibly fall through the tube without being suspended and transported by the air.
30 Herved opstår et vist unødigt tryktab.30 This results in some unnecessary loss of pressure.
Formålet med den foreliggende opfindelse er at tilvejebringe en indretning, hvormed ovennævnte ulemper undgås. 1The object of the present invention is to provide a device for avoiding the above-mentioned drawbacks. 1
Dette opnås ifølge den foreliggende opfindelse ved en indretning af den i indledningen angivne art, og som er DK 171128 B1 2 kendetegnet ved, at spredeorganet omfatter mindst to indbyrdes og med føderøret koaksiale spredeplader, der er anbragt for enden af føderøret, vinkelret på dettes akse og aksialt forskudt for hinanden og at hver af spredepladerne, 5 bortset fra den nederste, er forsynet med en central åbning for passage af en del af det tilførte materiale til den eller de underliggende spredeplader.This is achieved according to the present invention by a device of the kind specified in the preamble, which is characterized in that the spreading means comprises at least two mutually coaxial spreading plates arranged at the end of the feeding tube perpendicular to its axis. and axially displaced to each other and each of the spreading plates, except the lower one, is provided with a central opening for passage of a portion of the applied material to the underlying spreading plate (s).
Herved opnås, at det tilførte materiale fordeles på flere 10 niveauer, således at lagtykkelsen ved kanten af hver spredeplade er mindsket proportionalt med antallet af spredeplader. På denne måde vil en hensigtsmæssig lagtykkelse selv ved forøgede fødningsmængder kunne fastholdes, eller endog reduceres i forhold til lagtykkelsen ved en 15 kendt udførelsesform med kun en spredeplade og derved kan også dispergeringseffekten fastholdes eller forbedres. Da materialet således med en indretning ifølge opfindelsen udstrømmer fra spredepladerne i forholdsvis tynde lag, vil al materialet blive dispergeret indenfor det omgivende 20 lufttilførselsrørs væg, således at nedfaldende eller recirkulerende materiale undgås. Da materialet endvidere fordeles mere jævnt, vil også luftfordelingen og disper-geringen langs omkredsen af spredeorganet blive mere optimal, fordi luftens tendens til at løbe uden om lokale 25 materialeophobninger mindskes ved den jævnere materialefordeling.Hereby, the material supplied is distributed over several 10 levels, so that the layer thickness at the edge of each spreading plate is reduced proportionally to the number of spreading plates. In this way, even at increased feed rates, a suitable layer thickness can be maintained, or even reduced relative to the layer thickness in a known embodiment with only a spreading plate, and thus the dispersion effect can also be maintained or improved. Thus, since the material with a device according to the invention flows from the spreading sheets in relatively thin layers, all the material will be dispersed within the wall of the surrounding air supply pipe, so that falling or recirculating material is avoided. Furthermore, as the material is more evenly distributed, the air distribution and dispersion along the circumference of the spreading means will also be more optimal because the tendency of the air to circulate around local material accumulations is diminished by the more even distribution of material.
For at opnå en vis tidsforsinkelse mellem luftens passage af de forskellige spredeplader og dermed en udjævning af 30 belastningen på luften især i de tilfælde, hvor der forekommer væsentlige og hurtige ændringer i fødningsmæng-den, foretrækkes det, at spredepladerne i lodret retning er anbragt forskudt for hinanden med en indbyrdes afstand på mellem 1 og 3, fortrinsvis 2 gange diameteren af føderørets 35 udløbsmunding.In order to achieve a certain time delay between the air passage of the different spreading plates and thus smoothing the load on the air, especially in cases where significant and rapid changes in the feed rate occur, it is preferred that the spreading plates are arranged in a vertical direction. for each other with a spacing of between 1 and 3, preferably 2 times the diameter of the outlet mouth of the feeder tube 35.
DK 171128 B1 3DK 171128 B1 3
For at opnå en ensartet fordeling af det tilførte materiale til de enkelte spredeplader, foretrækkes det, at tværsnitsarealet af åbningen i en spredeplade er lig med n/(n+l) gange tværsnitsarealet af føderørets udløbsmunding, hvor n 5 er antallet af underliggende spredeplader.In order to obtain a uniform distribution of the feed material to the individual spreading plates, it is preferred that the cross-sectional area of the opening in a spreading plate is equal to n / (n + 1) times the cross-sectional area of the feed pipe outlet mouth, where n 5 is the number of underlying spreading plates.
Ifølge opfindelsen foretrækkes det endvidere, at sprede-pladerne er stort set cirkulære.Furthermore, according to the invention, it is preferred that the spreading plates are substantially circular.
10 For at forøge spredningseffekten af spredepladerne kan indretningen være forbundet med et drev til rotation af spredepladerne om deres fælles akse.To increase the spreading effect of the spreading plates, the device may be connected to a drive for rotating the spreading plates about their common axis.
Opfindelsen skal i det følgende forklares nærmere under 15 henvisning til tegningen, der er skematisk, og hvorThe invention will now be explained in more detail below with reference to the drawings, which are schematic and where
Fig. 1 viser en kendt indretning til udspredning af pulverformet materiale og 20 Fig. 2 viser en ud før el ses form for indretningen ifølge den foreliggende opfindelse.FIG. 1 shows a known device for spreading powdered material; and FIG. 2 shows a form of device for the device according to the present invention.
I den i fig. 2 viste udførelsesform for indretningen ifølge den foreliggende opfindelse omfatter denne et føderør 11 25 med en udløbsmunding 13 for fødning af materiale, et spredeorgan 14 med tre spredeplader 15, 17 og 19 for udspredning af materialet samt et omgivende rør 25, hvori en luft strømmer nedefra og op. Spredepladerne 15 og 17 har hver en central åbning 16 og 18, mens den neder s te 30 plade 19 er massiv.In the embodiment shown in FIG. 2, the embodiment of the device according to the present invention comprises a feeding tube 11 25 with an outlet orifice 13 for feeding material, a spreading means 14 with three spreading plates 15, 17 and 19 for spreading the material and a surrounding tube 25 in which an air flows from below and up. The spreading plates 15 and 17 each have a central opening 16 and 18, while the lower 30 plate 19 is solid.
Materialet, der fødes gennem føderøret 11, falder fra udløbsmundingen 13 ned på den øverste spredeplade 15, hvorpå en del af materialet strømmer mod og udover pladen 35 15's kant og ud i den opadstrømmende luft i luftrøret 25, hvor materialet gennemblæses og videretransporteres 4 DK 171128 B1 suspenderet i luften, mens den resterende del af materialet falder videre ned gennem åbningen 16 til den underliggende spredeplade 17, hvorpå der sker det samme som for pladen 15. En sidste del af materialet falder gennem åbningen 18 5 i spredepladen 17 ned til den nederste spredeplade 19, hvorfra materialet spredes på samme måde som med en spredeplade i den kendte udførelsesform.The material fed through the feeder tube 11 falls from the outlet orifice 13 onto the upper spreading plate 15, whereupon a portion of the material flows towards and beyond the edge of the plate 35 15 and into the upwardly flowing air in the trachea 25, where the material is blown and transported 4 DK 171128 B1 suspended in the air while the remaining portion of the material descends further through the aperture 16 to the underlying spreading plate 17, the same as for the plate 15. A final portion of the material falls through the aperture 18 5 of the spreading plate 17 down to the lower spreading plate 19, from which the material is spread in the same way as with a spreading plate in the known embodiment.
10 15 20 25 30 3510 15 20 25 30 35
Claims (4)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK040592A DK171128B1 (en) | 1992-03-26 | 1992-03-26 | Device for spreading powdered material in an air stream |
| DE4304508A DE4304508A1 (en) | 1992-03-26 | 1993-02-15 | Distributor for dispersing powdered material in a gas stream - has coaxial distributor plates with central opening for passing through part of supplied material to plate below |
| JP5068553A JPH0639258A (en) | 1992-03-26 | 1993-03-26 | Device for diffusing powdery material into gaseous stream |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK040592A DK171128B1 (en) | 1992-03-26 | 1992-03-26 | Device for spreading powdered material in an air stream |
| DK40592 | 1992-03-26 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK40592D0 DK40592D0 (en) | 1992-03-26 |
| DK40592A DK40592A (en) | 1993-09-27 |
| DK171128B1 true DK171128B1 (en) | 1996-06-24 |
Family
ID=8093146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK040592A DK171128B1 (en) | 1992-03-26 | 1992-03-26 | Device for spreading powdered material in an air stream |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0639258A (en) |
| DE (1) | DE4304508A1 (en) |
| DK (1) | DK171128B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107999391A (en) * | 2017-11-30 | 2018-05-08 | 宁波鑫神泽汽车零部件有限公司 | Powder sieving mechanism |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6938669B2 (en) | 2001-08-30 | 2005-09-06 | Denso Corporation | Metal molding method and apparatus |
| CN107999392B (en) * | 2017-11-30 | 2020-04-14 | 宁波鑫神泽汽车零部件有限公司 | Plastic powder screening device |
-
1992
- 1992-03-26 DK DK040592A patent/DK171128B1/en not_active IP Right Cessation
-
1993
- 1993-02-15 DE DE4304508A patent/DE4304508A1/en not_active Withdrawn
- 1993-03-26 JP JP5068553A patent/JPH0639258A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107999391A (en) * | 2017-11-30 | 2018-05-08 | 宁波鑫神泽汽车零部件有限公司 | Powder sieving mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| DK40592D0 (en) | 1992-03-26 |
| JPH0639258A (en) | 1994-02-15 |
| DK40592A (en) | 1993-09-27 |
| DE4304508A1 (en) | 1993-09-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B1 | Patent granted (law 1993) | ||
| PBP | Patent lapsed |