DE2011783C3 - Feeding device for a multi-egg roller mill - Google Patents

Description

The invention relates to a feed device, but extremely complicated speed

tion for a milling roller chair, with a Ε ^^^^^ μ ahlgut from a

opening out to the grinding gap of the pair of rollers, one has also already seen '<£ * J iLsen (French for the pneumatic supply of the ground material - large height w. the grinding gap tgi « K

the sheet separator, whereby the separated research s.sche Patentschnf 1 331 .76) Ua g

The air along the surface of the on the inside 60, however, has the disadvantage that the eriorae the curvature of the arch separator ζ "| ™ β" |. known malt grist

first grinding roller as well as opposite _Z u whose SJ ^ äSjX Til d WaI

the curvature uc »uufu.ü ^. ^^ v ..," .. _o

first grinding roller as well as opposite to which finally are derived in a known Maizscnroi direction of rotation. Mill aspiration openings in the upper part of the WaI - a feed device of this type, in which the Zen chair housing is provided (German use pneumatically conveyed grist with the desired 6 ₅ sample font 1 696 445).

/--__u...:_j: "i. ";,;" _Aon vfnhUnalt is opliilirt. The object on which the invention is based is

sr rra ^ niSÄ ^ iit: ^ f ä ä

knows. However, this device has the disadvantage. to create the genus mentioned,

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According to the conveying air requirement, an even regrind feed of the grinding rollers of the usual roller length allowed.

This object is achieved with the feed device of the type described in that the Sheet separator designed as a conveyor channel with a flat cross-section and a width corresponding to the roll length is, at whose inlet a regrind feed distributor of the same width is arranged and through its inlet the conveying air via one or more aspiration openings in the roller frame housing is sucked in.

This makes it possible to build a roller mill with the usual Walien length. Through training of the sheet separator as a conveying channel, the flow resistance can be selected high enough, so that the air is uniform over the entire width of this channel (i.e. parallel to the longitudinal axis of the roller) is distributed. This means that the grinding rollers are fed evenly over their entire length. Even though the conveying air is sucked out of the roller mill through a riser with a relatively small cross-section becomes, the even distribution he can range because the conveyor channel has a small width, so that its cross section is larger than that of the Riser is, but still has enough resistance to force air into the to use the entire length of the roller. The riser serves as a pneumatic conveying line for the supply of the ground material to the next processing machine, usually a plansifter.

The inventive design of the feed device makes it possible to use it with the relatively small The amount of air available to operate that was previously used for the pneumatic conveyance of the ground Guts from the roller mill was necessary. In the known pneumatic feed devices much more air is needed, so that the pneumatic conveyor system of the mill with a large number of Roller mills would no longer have remained economical; not necessarily for pneumatic conveying necessary air must namely there also the resistances at the inlet, in the delivery line, in the Subsequent separators, possibly in a filter and in the fan overcome what a considerable. means additional energy expenditure.

The ground material is accelerated in the channel, which becomes thinner and thinner in the direction of the grinding gap there is a veil of grinding material so that the grains do not mutually support each other when they are fed into the grinding gap disturb.

In a particular embodiment of the feed device according to the invention it is provided that some conveying air also along the surface of the second grinding roller through a gap between the Outer wall of the sheet separator and this grinding roller is pulled off. By the end of the outer wall of the sheet separator is arranged at a distance from the second grinding roller, can be a little Air can also be withdrawn from this side so that the air entrained by this grinding roller does not up can get through the grinding gap. The slow grinding roller is advantageously arranged on this side, because the effect of the separated conveying air is greater on the other hand and thus that of the fast grinding roller can better push back air entrained. For this purpose the derivation takes place the separated conveying air along the grinding roller expediently through

softer from the inner wall of the

is limited. At least ^ lets ^ J

Zulskanal initially from the channel-shaped

train separators. Hand one

The invention is hereinafter referred to as «^ J ° J £ _ schematic drawing of a Ausiuhrungsbei game explained in more detail. ,.

In the housing 1 of a miller ^ zensmhk «nd d, e

EAT? ÄS- "«

net is. In the well-known, unquestioned A Distance of the gate valve 6 with respect to the Spe, se roller 5 automatically regulated, dam. join MaMgU along the whole length of this food

wall 13 determined, with the outer ^ a distance 14 from the grinding roller »ends. D inner wall 13 can be adjusted so that the listening width of the channel. Thus, the distance of "nenwand 13 to outer wall 12, a ge desired ordcrgt F can be adjusted speed ^{D 'e"} ^ grinding roll! is on the inside ^ crude

ÄKSK

SSSSSSSESs SSSSSS

HSaSsSSS

conveying pneumatic suction porting 18Us arranged in the hopper 16. A flap 19 erlauDi Ϊ J η P? Oduktenf catching ⁸ Luss under the Mahlspa.t and un hopper 16 ^ hrenddem eme flap 20 the feed device of the conveying channel 9 macnt accessible 5 to 8 and the EinFauf. 11 Below the flap 20 there is a narrow aspiration opening 21 which extends over the entire length of the grinding rollers. This aspiration opening 21 could be replaced by several aspiration openings distributed over the entire length of the grinding rollers

The regrind fed to the roller mill falls into the chute door4 and, depending on its height, is in a known way, the slide 6 more or less open so that the grist is on the whole Distributed length of the roller frame without causing a backlog upwards. The Spe «wata 5 promotes the grist along the steering arc, 8, the it feeds it into the inlet 11 of the conveying channel 9 or sheet separator 10. Due to the negative pressure in the Suction conveying line 18 is air through the aspiration opening 21 from the surrounding space in, the upper part of the housing 1 sucked. At the inlet 11, the ground material fed in mixes with the in air sucked into the conveying duct. Due to the centrifugal effect the grinding stock is concentrated on the outer wall 12 of the conveyor channel 9 or sheet

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Scheiders 10. The air that is forced to the side of the inner wall 13 of the sheet separator 10 and separated is, flows into the steligen exhaust duct 15, while the ground material through the outer wall 12 of the sheet separator 10 exactly in the middle of the grinding gap formed by the grinding rollers 2,3 is fed. Thanks to the formation of the exhaust duct 15, the speed of the separated remains Conveying air is still large enough to remove that which is swept along by the fast grinding roller 2 in its direction of rotation To push back air. This happens with the formation of small eddies all along the top Surface of the grinding roller 2, which in addition to the undisturbed flow of the feed also has the further advantage offers that the grinding roller 2 is particularly well cooled by the air flow in the exhaust duct 15 will.

The air passes from the exhaust duct 15 into the funnel 16 and takes what has passed through the grinding gap ground material in the nozzle-shaped inlet 17 of the suction conveyor line 18 with to this To deliver the product to the closest processing point. From the sheet separator 10, the separated The delivery air takes very fine parts with it through the exhaust duct 15. This will make these parts not unnecessarily passed through the grinding gap, which increases the performance and the efficiency. It It is also important that the lightest parts that are carried away with the exhaust air are the. Regrind for Further processing (especially sifting) can be added again.

ίο Since the outer wall 12 of the sheet separator 10 in ends at a distance 14 from the slow grinding roller 3, some air can also come out of the sheet separator 10 are drawn off along the grinding roller 3 in the direction of the inlet 17 of the suction conveyor line 18, which prevents the air entrained by the grinding roller 3 from reaching the grinding gap, and the grinding roller also cools a little.

The regular longitudinal distribution and a corresponding one thin feeding veil is used for calibration adjustment of the roller grinding gap and for evenness of the products and decisive for the performance.

1 sheet of drawings

Claims (1)

1 feed device for a milling roller for the in FJ ^ J ^ SS reS ^ chmal. chair, with a conveyor line in front of the grinding gap of the roller 5 »" ^ iiSS * « pair flowing out to the pneumatic supply Because the Mahlg ^u * ^SC J ° * must have, one has evaporation of the ground material serving Bogenabscheider, very high hwind ^ ^ e ^ ^ ^ _L ^ _ge with the separated conveying air along the almost none, ZW to W ^ _{is only} one Surface of the inside of the curvature of the M-M rollers »MJ of the _{MaM roller} of the sheet separator arranged first grinding io small part of ™> ™ ^c . _dJ grinding roller included Set fowie opposite to their direction of rotation so that d * "J ^ fJ _{n grinding gap} comes tune is derived, thereby known Luftdocn dis η ζeichηet that the Bogenabscheider (10) ^^, f as ^"ndd * ,, * _Ei nzuges the millbase by Conveying channel (9) flat cross-section and the order to disturb the b.nz ^^ _{/ to Mahl} . _{Roll length} corresponding width formed x ₅ Aufwirbehmg to of ^{α would} mean “, one has is. at its inlet (11) a lun w _{cifem before the grist which splits out the grist} feeding grist divider (5,6) of the same width right side veataeto ^ teg special aspira- is arranged and through its inlet (11) the grinding gap ^νο Π ^ ^ε ™ "· ™ ° _are (German patent Forcing air over one or more aspiratons- ^^^^^^^ öaiM ^ Miita with- openings (21) in reasonable roll mill housing (1) * os ^ hnft 1 OS ^ M ^ ^^ Umdi _{switch has} i _{countersinking} ^ '^ device according to claim 1, *, ^^^^^^ X ^^ characterized in that some feed air also roller in the vicinity aes y along the surface of the second Mahlwate ( ^de »« ^h «^" S ^ .; ^ d relatively complex and (3) through a gap (14) between the outer ₂₅ ^, SÄn ^ t eiXhen means no longer wall (12) of the sheet separator (10) and d.eser fj ^^^ ZZalü adequate protection Grinding roller is withdrawn. ? °, ⁸ For example, pulling your hands 3 feeding device according to claim 1 or 2, for pulling in oe.sp characterized in that the distributor ■ DAT (5,6) wahrle.stet f. millbase in the Mahlaus a feed roller (5) with storage spool (6) Loading ₃ o For the ^{one EISU} P ^"g _{2" ke} Y _td f _e that of the circumference * stands on which a steering curve (8j to the Uinton gap m « a ^ warfykert. ^ ^^ ^{kung of the grist flow} into the inlet (11) of the grinder f _o ^z ;" J " ₃ ^Ρ " Γ ^ ₆ Τ such a loading conveyor channel (9) connects. ^ T ⁸ ™ ^ ΚΪrichtung is an arcuate one 4. Speisev.urichtung according to e.nem of the known SpeisevorrP ¹ ^ ¹ J _tuhIgehäuse angeordsprüche 1 bi, 3, characterized in that the 35 ^Fo ; ^the \ ^ X'verteler for the even discharge of the separated conveying air along neten Jeweg .chen Verte. the first grinding roller (2) is switched by a take-off cable ^B " ^c ^ ^un S ^ _u ^Ma _n ^h S (French Pa- nal (15) takes place, which from the inner wall (13) with ^d ^ _ff ^^ "" ^ one _could of the sheet separator (10) is limited. ^ Lrhöhune of processing capacity for 5. Feed device according to claim 4, 40 ^trachtllch ^ ^E _p ^r ™ _e ^g _n £ _{e crre} ichen. It has been characterized by that the first grinding roller a given Wahenla ^^ err ^ ^ (2) the fast rotating grinding roller, st the grist on you scm ^^ Siiht nach e.nem der And ^dem J ^^ ffi / "'fS hi (2) the rapidly rotating grinding roller, st the Mag ^^ _Mah , _walzc 6. Supply device according e.nem the presence ^{of the} J ^^ ffi / "'fS rotational speed besprüche 1 to 5, characterized in that the ground material was the b", "J" ^h ^ ™ _Mah \ _uts a Ge-width of the conveyor channel ( 9) near the 45 ^^^ SScm indentation. This drch displacement of the inner wall ^^ J ^^^ iiU dß dh di nnl Width of the conveyor channel (9) in the vicinity of the 45 ^^^ SScm indentation provided. This Grinding gap by displacement of the inner wall ^^ J ^^^ ihttiU that through the nnl- (13) is changeable. CeSe friction "wipe grinding roller, grist and When a certain amount of heat is generated near Jc, this impairs the cooling of the grinding roller. ⁵ Furthermore, the ground material has already been placed in the gap through two upstream auxiliary rollers m t Rubber covering thrown (Swiss Zensche patent specification 348 598). The mechanics of this arrangement .st