NO814186L

NO814186L - suction nozzle

Info

Publication number: NO814186L
Application number: NO814186A
Authority: NO
Inventors: Paul Luebbehusen
Original assignee: Waeschle Maschf Gmbh
Priority date: 1980-12-09
Filing date: 1981-12-08
Publication date: 1982-06-10
Also published as: ATA503081A; FR2495587A3; AT386816B; LU83816A1; IT8123484V0; NL8105287A; BE891392A; GB2089310A; FR2495587B3; JPS57111727U; GB2089310B; SE8107244L; CH653647A5; DE8032676U1; DK543081A; IT8123484U1; JPS6040508Y2

Description

Oppfinnelsen angår en sugedyse.for pneumatisk transport av massgods, bestående av en i massegodset innført rør-stuss hvis munning via et rørstykke er forbundet med en over massegodsets overflate liggende oppsugningsluftåpning for transportluften og som over sin maksimale nedføringsdybde har en sekundærluftåpning hvis tverrsnitt kan innstilles ved hjelp av en skyver. The invention relates to a suction nozzle for the pneumatic transport of bulk goods, consisting of a pipe socket introduced into the bulk goods, the mouth of which is connected via a piece of pipe to a suction air opening for the transport air lying above the surface of the bulk goods and which above its maximum descent depth has a secondary air opening whose cross-section can be adjusted by using a pusher.

En slik sugedyse er kjent fra DE 2 523 155. Det rør-stykke som forbinder sugedysens munning med den over massegodsets overflate liggende innsugningsluftåpning, består der av et til rørstussen koaksialt mantelrør som sammen med rør-stussen begrenser to ringformede spalter av hvilke den øvre danner innsugningsåpningen for transportluften og den nedre danner en overstrømsåpning gjennom hvilken transportluften ved medbringing av massgodset strømmer inn i rørstussens munning. En ulempe for denne konstruksjon er det forholds-vis stor plassbehov og materialforbruk for den koaksiale anordning av rørstussen og det denne omgivende mantelrør. Such a suction nozzle is known from DE 2 523 155. The pipe piece that connects the mouth of the suction nozzle with the intake air opening above the surface of the bulk material consists of a jacket tube coaxial with the pipe nozzle which, together with the pipe nozzle, limits two annular slits of which the upper one forms the intake opening for the transport air and the lower one forms an overflow opening through which the transport air flows into the mouth of the pipe when the bulk material is brought along. A disadvantage of this construction is the relatively large space requirement and material consumption for the coaxial arrangement of the pipe spigot and the casing pipe surrounding it.

Oppfinnelsen tar sikte på å frembringe en sugedyse av prinsipielt samme type, men som er plass- og materialbe-sparende utformet. The invention aims to produce a suction nozzle of basically the same type, but which is designed to save space and material.

Denne oppgave løses ved de i kravets karakteriserende del angitte trekk. This task is solved by the features specified in the characterizing part of the requirement.

Kravene 2-5 angår fordelaktige utførelser og videre-utforminger. Claims 2-5 concern advantageous designs and further designs.

På tegningen er sugedysen' ifølge oppfinnelsen vist i en utførelse skjematisk forenklet, idet figur 1 viser et lengdesnitt gjennom sugedysen under bruk og figur 2 viser et enderiss og et sideriss av sugedysen på figur 1. In the drawing, the suction nozzle' according to the invention is shown in a schematically simplified version, as Figure 1 shows a longitudinal section through the suction nozzle in use and Figure 2 shows an end view and a side view of the suction nozzle in Figure 1.

Ifølge figur 1 består sugedysen av en rørstuss 1 som fortrinnsvis er ført på skrå gjennom en på egnet, her ikke nærmere vist, måte utformet åpning i veggen av en massegods-beholder 10 og hvis munning 2 er ført ned i massegodset s. Rørstussens 1 andre ende er forbundet med en transportledning i et sugetransportanlegg av en hvilken som helst type. Rørstussen 1 er over den største del av sin lengde avdelt med en skillevegg 4 til en strømningsvei I og en strømnings-vei II. Fra en innsugningsluftåpning 5 innsuges transport-luft F som strømmer via strømningsveien I til rørstussens munning 2 og derfra under medbringelse av massegods gjennom strømningsveien II til den transportledning som er tilkoblet sugedysen. Sammen med transportluften F suges sekundærluft N via en sekundærluftåpning 3 anordnet nær innsugningsluftåpningen 5, men adskilt fra denne ved et tverrsteg 6 mellom rørmantelen og skilleveggen 4. For innstilling av optimale transportbetingelser, hhv. en ønsket belastning er en felles, parallell med røraksen forskyvbar skyver 7 tilordnet de to åpninger 3 og 5. According to Figure 1, the suction nozzle consists of a pipe nozzle 1 which is preferably led at an angle through a suitable, not shown in detail here, designed opening in the wall of a bulk material container 10 and whose mouth 2 is led down into the bulk material p. The pipe nozzle 1 other end is connected to a transport line in a suction transport system of any type. The pipe spigot 1 is divided over the greater part of its length by a partition wall 4 into a flow path I and a flow path II. Transport air F is sucked in from an intake air opening 5, which flows via the flow path I to the mouth of the pipe nozzle 2 and from there, carrying bulk material, through the flow path II to the transport line which is connected to the suction nozzle. Together with the transport air F, secondary air N is sucked in via a secondary air opening 3 arranged close to the intake air opening 5, but separated from this by a transverse step 6 between the tube jacket and the partition wall 4. For setting optimal transport conditions, respectively. a desired load is a common, displaceable pusher 7 parallel to the pipe axis assigned to the two openings 3 and 5.

Slik det især fremgår av figur 2 arbeider denne skyver ifølge differansprisippet og frigir altså i den ene åpning ét tilsvarende større tverrsnitt jo mer skyveren for-skyves for forminskning av tverrsnittet i den annen åpning. As can be seen in particular from figure 2, this pusher works according to the difference principle and thus releases a correspondingly larger cross-section in one opening the more the pusher is moved to reduce the cross-section in the other opening.

En selvstendig arbeidende tilbakeslagsklaff 8, hhv.An independently working check valve 8, respectively.

9 er tilordnet hver åpning 3 hhv. 5 eksempelvis fremstilt av et egnet elastisk materiale. Tilbakeslagsklaffene hindrer at massegods, især støvformet massegods, trenger ut gjennom åpningene 3, hhv. 5, når eksempelvis den til sugedysen til-koblede transportledning utluftes plutselig, altså nedbygges under undertrykk og det eventuelt kortvarig oppbygges et overtrykk. 9 is assigned to each opening 3 or 5, for example, made of a suitable elastic material. The non-return flaps prevent bulk material, especially dusty bulk material, from penetrating through the openings 3, respectively. 5, when, for example, the transport line connected to the suction nozzle is suddenly vented, i.e. it builds up under negative pressure and possibly briefly builds up overpressure.

Claims

1. Suction nozzle for pneumatic transport of bulk goods, consisting of a pipe nozzle introduced into the bulk goods, the mouth of which is connected via a piece of pipe to an intake air opening for the transport air, which lies outside the surface of the bulk goods and which above its maximum insertion depth has a secondary air opening whose cross-section can be adjusted using of a pusher, characterized in that the pipe end (1) is divided by a dividing wall (4) which extends from the mouth (2) past the intake air opening (5) and a transverse step (6), into two flow paths (I, II) of which one (I) connects the intake air opening (5) with the mouth (2) and the other (II) carries the sucked bulk material S and is connected to the secondary air opening (3).

2. Nozzle according to claim 1, characterized in that the cross-section of the intake opening (5) and the cross-section of the secondary air opening (3) are mutually counteractingly changeable by means of a common pusher (7) which works according to the difference principle.

3. Nozzle according to claim 1-2, characterized in that the secondary air opening (3) is arranged in the direction of transport of the bulk material downstream. the intake air opening (5) and is separated from this by a transverse step (6) which connects the pipe casing to the partition wall. (4).

4. Nozzle according to claims 1-3, characterized in that the intake air opening (5) and the secondary air opening (3) are each assigned an independently working blowback block (8, 9).

5. Nozzle according to claim 4, characterized in that the return flaps (8, 9) are arranged inside the pipe connection (1).