SE455415B

SE455415B - DEVELOPMENT AND DISTRIBUTION OF SOLID PARTICLES IN A GAS FLOW

Info

Publication number: SE455415B
Application number: SE8003751A
Authority: SE
Inventors: J Ruud
Original assignee: Nordson Icab Ab
Priority date: 1980-01-04
Filing date: 1980-05-20
Publication date: 1988-07-11
Also published as: SE8000066L; SE8003751L; JPS6246221B2; JPS56108556A; SE435583B

Description

455 415 z strax framför pulversprutmunstycket, men naturligtvis kan den inkopplas även på andra ställen utmed transportkanalen, exempel- vis vid rörkrökar. 455 415 z just in front of the powder spray nozzle, but of course it can also be connected in other places along the transport channel, for example at pipe bends.

Anordningen är uppbyggd av ett antal med varandra lätt sammanmonterbara delar och bildar i monterat skick en rör- formig del, såsom framgår av fig. 1. Ett hylsformigt hölje, som betecknas med siffran 1, bildar anordningens huvudbeståndsdel, i vilken anordningen inneslutes och medelst vilken de ingående delarna uppbäres. I höljets 1 ena ände finns en gavelvägg 2, som är försedd med en mynningsöppning 3 och som är vänd mot transport- riktningen, som på ritningen markeras med en pil. En införings- muff 5, som i ena änden är försedd med slangkopplingsanslutning 4, är införd i höljets andra ände och anligger med en ringformig fläns 6 mot insidan av gavelväggen 2. Införingsmuffen S uppvisar i transportriktningen vidgande tvärsnitt, som i föreliggande exempel är koniskt.The device is made up of a number of parts which can be easily assembled with one another and in assembled condition forms a tubular part, as shown in Fig. 1. A sleeve-shaped housing, denoted by the number 1, forms the main component of the device, in which the device is enclosed and by which the constituent parts are supported. At one end of the housing 1 there is an end wall 2, which is provided with an orifice opening 3 and which faces the transport direction, which in the drawing is marked with an arrow. An insertion sleeve 5, which at one end is provided with a hose coupling connection 4, is inserted in the other end of the housing and abuts with an annular flange 6 against the inside of the end wall 2. The insertion sleeve S has a widening cross section in the transport direction, which in the present example is conical.

Motstående ände av höljet 1 uppvisar på insidan ett gängparti 7, vars funktion senare skall förklaras.The opposite end of the housing 1 has on the inside a threaded portion 7, the function of which will be explained later.

En diffusor 8, som har formen av ett rör och som består av luftgenömsläppligt poröst material, framställt exempel- vis genom sintring, är införd i höljet 1 från dess andra ände.A diffuser 8, which has the shape of a tube and which consists of air-permeable porous material, produced for example by sintering, is inserted into the housing 1 from its other end.

Ena änden 8A på denna diffusor 8 anligger i en ringformig ansats 9, med en mellanliggande O-ringstätning 10, som är belägen på införingsmuffens 5 fläns 6. Diffusorns 8 andra ände 8B anligger likaså i en ringformig ansats ll,_som är anordnad i ena änden av ett ringformigt fästelement 12. En ytterligare ringformig ansats 13 är belägen intill sagda ansats 11 på fästelementet 12 och är, såsom framgår av fig. 1, avsedd att medelst en ytterligare 0- ring 10A tätande mottaga en cirkelformig skiva 14, som bildar en strypfästdel 14. Denna del 14 är försedd med ett flertal utmed omkretsen i ringform fördelade genomgångsöppningar 15 och uppvisar ett centrumhål 16 avsett att mottaga en gängad tapp 17, som i ena änden är fästad vid en kärna 18 med utsträckt cylind- risk form och konisk spets 18A. Gängtappens 17 andra ände är avsedd att inskruvas i en cylindrisk de1 19, som bildar en sekundärkärna 19 belägen på motsatta sidan av hàlskivan 14.One end 8A of this diffuser 8 abuts in an annular shoulder 9, with an intermediate O-ring seal 10, which is located on the flange 6 of the insertion sleeve 5. The other end 8B of the diffuser 8 also abuts in an annular shoulder 11, which is arranged at one end of an annular fastening element 12. A further annular shoulder 13 is located next to said shoulder 11 on the fastening element 12 and is, as shown in Fig. 1, intended to receive by means of a further O-ring 10A sealingly a circular disc 14, which forms a choke fastening part 14. This part 14 is provided with a plurality of passage openings 15 distributed along the circumference in an annular manner and has a center hole 16 intended to receive a threaded pin 17, which is attached at one end to a core 18 with an extended cylindrical shape and conical tip 18A. . The other end of the threaded pin 17 is intended to be screwed into a cylindrical part 19, which forms a secondary core 19 located on the opposite side of the hollow disc 14.

Efter hopmonteringen av hålskivan 14 och dess kärnor 18 resp. 19 inskjutes denna enhet i hölget 1, varefter fästelementet 12, som i sin ena ände uppvisar ett parti med. 455 415 utvändiga gängor 20, fastskruvas med de invändiga gängorna 7 i höljet 1, så att hàlskivan 14 fastklämmes mellan detta fäst- element 12 och diffusorröret 8, som i sin tur fastklämmes mot höljesflänsen 2. Fästelementet uppvisar i sin ena ände anslut- ningar 21 avsedda för sammankoppling med en lös rördel.22, som är försedd med en slangkopplingsanslutning 23. Denna slangkopp- lingsanslutning 23 kan naturligtvis anordnas på fästelementet 12 i dess fria ände om så önskas. Höljet 1 är försett med en gäng- försedd kanal 24, i vilken en lös slangförbindningsdel 25 är fastskruvad. Denna del 25 uppvisar en slangsnabbkopplingsför- bindning 26, med vilken en gastillförselledning är anslutbar.After assembling the perforated plate 14 and its cores 18 resp. 19, this unit is inserted into the housing 1, after which the fastening element 12, which at its one end has a portion with. 455 415 external threads 20, are screwed with the internal threads 7 in the housing 1, so that the hollow plate 14 is clamped between this fastening element 12 and the diffuser tube 8, which in turn is clamped against the housing flange 2. The fastening element has at its one end connections 21 intended for connection with a loose pipe part.22, which is provided with a hose connection connection 23. This hose connection connection 23 can of course be arranged on the fastening element 12 at its free end if desired. The housing 1 is provided with a threaded channel 24, in which a loose hose connection part 25 is screwed. This part 25 has a hose quick-connect connection 26, with which a gas supply line is connectable.

Funktionen av den ovan beskrivna anordningen skall nu närmare förklaras. Pulver, som medelst exempelvis tryckluft transporteras i rörledningar, införes i anordningens ena ände. Pulverströmmen sprides vid kärnans 18 koniska parti l8A från anordningens mitt ut mot dess periferi. Gas, som exempelvis utgöres av tryckluft, införes genom anslutningen 25 till höljets 1 inre och sprides genom de små öppningar, som finns i det porösa material, som diffusorn 8 består av. Vid införandet av denna gasström i den genom anordningens inre gående pulverströmmen, blandas pulvret under samtidig kompression med den genomströmmande gasen och fördelas. Klumpar och andra större materialanhopningar uppluckras således effektivt medelst föreliggande anordning.The function of the device described above will now be explained in more detail. Powder, which is transported in pipelines by means of, for example, compressed air, is introduced into one end of the device. The powder stream is distributed at the conical portion 18A of the core 18 from the center of the device towards its periphery. Gas, which for example consists of compressed air, is introduced through the connection 25 to the interior of the housing 1 and is spread through the small openings present in the porous material of which the diffuser 8 consists. Upon introduction of this gas stream into the powder stream passing through the interior of the device, the powder is mixed under simultaneous compression with the flowing gas and distributed. Lumps and other larger accumulations of material are thus effectively loosened by the present device.

Uppfinningen är ej begränsad till det ovan endast såsom exempel beskrivna och på ritningarna visade utförandet, utan kan varieras till sina detaljer inom ramen för efterföljande patentkrav.The invention is not limited to the embodiment described above only as examples and shown in the drawings, but can be varied in its details within the scope of the appended claims.

Claims

455 415 P a t e n t k r a v

Device for loosening and distributing solid particles, which are transported in powder form in a gas stream from a container to a spray nozzle and that said device is arranged on the upstream side of the spray nozzle and consists of a tubular part (8), which is made of porous, air-permeable material and which allows the powder transported in a gas stream to pass and that means (18, 25, 26) are provided for introducing a gas stream with overpressure into the particle stream passing through the tubular part (8), k ä It is noted that a disc (14), which has a plurality of passage openings (15), is received in the device and acts as a throttling part so that the powder is mixed with said gas stream under pressure so that lumps and other larger accumulations dissolve before the powder is transported. through the passage openings (15) to the spray nozzle. 1

Device according to claim 1, characterized in that the tubular part (8), which is preferably completely enclosed by a housing (1), is produced by sintering.

Device according to one of the preceding claims 1 or 2, characterized in that the housing (1) consists of a sleeve (1) which has a gable wall (2) provided at its one end with a mouth opening (3). , the tubular part (8) preferably being supported at one end (8A) of said end wall (2) and at its other end (8B) of an annular fastening element (12). z

Device according to one of the preceding claims, characterized in that a core (18), which preferably has a comically tapered cross-section (18A) in the direction of the transport direction, is supported in the device.

Device according to claim 5, characterized in that the core (18) is supported in the center of said throttling part (14).

Device according to one of the preceding claims, characterized in that the passage openings (15) are distributed in an annular shape along the circumference of the throttle part (14). ß 5 455 415

Device according to claim 6, characterized in that said throttle fastening part (14) consists of a circular disc (14), which is supported clamped between the tubular part (8) and the annular fastening element (12).

Device according to claim 7, characterized in that the fastening element (12) along the periphery has threads (20) which fit into the threads (7) located on the inside of the casing sleeve (1), and that a shoulder (13 ), which extends along the circumference of the fastening element (12), is arranged to receive and support said neck disc (14).

Device according to one of Claims 5 to 8, characterized in that the core (18) is supported by means of a threaded part (17) which can be screwed to the center of the choke part (14), which preferably also supports a conveyor part (14) in the transport part. direction of projecting secondary core (19).

Device according to one of Claims 3 to 9, characterized in that an insertion sleeve (5) is held at the powder insertion end of the device by means of a flange part (6) which is clamped between the housing end wall (2) and the tubular part (8). , said sleeve (5) having a widened cross section in the direction of transport.