DE2011783B2 - FEEDING DEVICE FOR A MILLING ROLLER - Google Patents

Description

The invention relates to a feed device for a milling roller mill, with an opening in front of the grinding gap of the roller pair, sheet separator serving for the pneumatic supply of the ground material, whereby the separated conveyor line along the surface of the arranged on the inside of the curve of the sheet separator first grinding roller as well as opposite to whose direction of rotation is derived.

Such a feed device, in which the pneumatically conveyed grist with the desired Speed is fed into the grinding gap is known from the Soviet patent specification 147 442. However, this device has the disadvantage.

that their performance is limited U. because the grist can not be well distributed by the conveyor line on a sufficient roll length. The conveying line for the relevant throughput M. viewed in the direction of the roller length, is relatively narrow. Because the grist already has a very high speed in this conveying line. hai only .. almost no line · available to distribute it over the length of the grinding rollers. Furthermore, only one

ίο small part of the conveying air along a grinding roller withdrawn so that the air entrained by this grinding roller reached close to the Mahlspali; and disturbs the supply.

To avoid the disturbance of the intake of the grist

Whirling up of the air carried along by the grinding rollers to the grinding gap is excluded., You already know different systems of scrapers in front of tleiv. Milling gap is provided, which is often adapted to special aspiration lines affiliated: -ind (German patent

Scripture 1 054S (Wr Um that carried away by grinding rollers Redirecting air in front of the grinding gap, ha; one has already proposed an additional small · .. To arrange the roller near the grinding gap: (German patent specification 1 134 56V).

These constructions are relatively complex and the grinding gap cannot never be achieved with simple means! be secured in such a way that adequate schooling is available. for pulling in, for example, the hands is guaranteed.

For feeding the ground material into the grinding gap at a speed that of the circumference - the Mahl.valzen corresponds, several solutions have already been proposed. In such a known Feeding device is an arch-shaped!

Conveyor channel arranged in the roller frame housing, Movable distributor for evenly feeding the grinding rollers along their entire length downstream with the grist (French patent I 138 694). That could be a serious one Achieve an increase in the processing capacity for a sesiebcne roller length. One has the grist is placed on the fast grinding roller well in front of the grinding gap, so that this grinding roller the grist is thrown down to its speed of rotation. A counter surface with a wedge-shaped indentation was provided to guide the ground material. This However, the structure has the disadvantage that dk: makes necessary Friction between grinding roller. Regrind and counter surface a certain amount of heat is generated.

which affects the cooling of the grinding roller.

Furthermore, you already have the material to be ground in the grinding gap by means of two upstream auxiliary rollers Rubber covering spun (Swiss patent 348 598). The mechanics of this arrangement is but extremely complicated.

In order to achieve the desired visual speed wedge, you also have the grist from one drop into the Mahlspali at a great height (French patent specification 1331276). This results in however, the disadvantage that the required overall height is too great.

Finally, in a known malt grist mill, there are aspiration openings in the upper part of the roller mill housing provided (German sample specification 1 696 445).

The object underlying the invention exists now in shanking a feed device of the type mentioned at the beginning, which at relatively low

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Cut from the grinding rollers from conventional rollers - which from the inner wall of the sheet cutter

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'I) ,,., - Task is initially carried out with the feed device of the feed channel from the channel-shaped arched

_t , j _n , _j ::: ■ ■, described type thereby nelöst. that the i separator train. in

13 ,,; .- -, heider as a conveyor channel with a flat cross-section. The invention is described below in relation to Manu emu

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_t l _L >ti.; -. n whose inlet a the Mahlüut feed game explained in more detail.

_t l _{L. r} '.i: .. hliiutverieiler »leicher width is arranged. In the housing 1 of a milling roller mill are the and -.vivli whose inlet the conveying air over an ic upper fast grinding roller 2 and the lower ^m ^ ^W1 ^

odev -..-- Lucre Aspirati;, iisöilnun »en stored in the roller frame - slower grinding roller 3. Lm Se.iut-

"Eh;->, is sucked. " Funnel 4 extends over the entire length of the

\) u \\ it is possible. a roller frame with the grinding roller and is in per se known An diiieii

usual .-, -. ι to build roller length. Through the training a feed roller 5 with a stowage gate "ai ^ e-

_{duP ies} boiien separators as a conveying channel can 15 closed, the eye pivotable about an axis 7,

"Vi ,. _; ... Select high flow resistance. net is. In well-known, not shown Au whu uei

(JI _1. 'Ic air on the small width of the fleece canal distance of the gate valve 6 -egeiiüber dei ^ P ^L! - | _

(d i. -.arallel to the longitudinal axis of the roller) »lei.-hniä- roller 5 automatically regulated, the_ Mai i _r

ßjö -viii will. This means that the grinding rollers are also over the entire length of this SpciM.-walz.ei \ eitei.

aul: -η winemaker I-änt: c uleichsamein fed. Ob 20 _about a "facilitated even supply the whole aul uan ^ e

_NV0 i ■■■■ Conveying air can be reached through a Slei »leitim» with rela- ting grinding rollers 2,3. At the reservoir e.

, iv'- no cross section from the YYalzeiisuihl abue- is connected in steering bow 8, which is the Mayiig.

_vlll . i, -d can the »easily maneuverable yerieikm» er in the Bogeiian- designed as a conveying channel 9

rev- because the conveyor channel has a small width. separator 10 at inlet 11 leads. The oruetka-

s, ₀ , its cross-section, although larger than that of the 25 nal 9, is caused by the outer wall 12 and the im.cn-

You ^; inn »is. but still a small enough wall 13 is determined, the outer wall I-11

\ VicT; '-mti has to force the air that ends a Absland 14 from the grinding roller 3, uie

η, η roller surfaces to be used. The interior wall 13 can be adjusted in such a way that the oi_

., is ' ■■ ...- umatic delivery line for the supply of the channel width. i.e. the distance from the inner wall Li

Che conveyor line for the supply of the derkanalbreüe. al

-IK-Ii Ciuts to the next Hworkur.ns- 30 to outer wall 12, a desired one κ mostly a flat ibis. "speed can be adjusted. The

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ii the inventive design of the feed pre-grinding roller 2 is on the inside of the curve;, _; it is possible to arrange them with the relatively small of the conveying channel 9, and they form to operate with dei utügung standing Luftmeiige. Inner wall 13 of the conveying channel 9 is the beginning of a for the pneumatic conveying of the continuous discharge channel 15 for which goods from the roller frame were necessary before the grinding gap. conveyor pipe separated from the ground material. The Abzugska _t -n known pneumatic feeding device 15 whose outer wall through the housing 1 lid vi'i needs more air so that the pneumatic is continued, opens into a funnel 16 unsuitable conveyor system of the mill with a large number of the through the Grinding rollers 2.3 formed MaIiI Walzciisiülile no longer remained economically 40 gap. The nozzle-like inlet 17 would be an upwards: the pneumatic suction conveyor line 18, which does not convey the pneumatic conveying, conditionally necessary air must namely also be arranged there in the "funnel 16. A flap i9 allows the resistances at the inlet, in the conveying line, in it To control the product flow under the grinding gap and in the downstream separator, if necessary in a funnel 16, while a filter and in the fan overcome what a damper 20 means, the feed device 5 to 8 and the considerable additional energy expenditure. Inlet 11 of the conveying channel 9 makes accessible. Ln-

The ground material is accelerated in the channel, which is located in the flap 20 in a narrow direction. · Aspira of the grinding gap towards an ever thinner uonsöse 21, which extends over the entire length of the there is a veil of material to be ground, so that the grinding rollers extend. This aspiration opening »21 Grains when entering the grinding gap are not mutually exclusive upset. Milling rollers replaced aspiration openings

In a special embodiment of the invention.

The normal feed device i., t provided that the grist fed to the roller mill falls into

some conveyance also air along the surface of the debris funnel 4. and depending on its fleas, the second grinding roller is opened through a gap between the more or less outer wall of the sheet separator and this grinder, in a known manner, so that the ground material is drawn off over the whole roller. By distributing the end of the outer length of the roller frame without causing the sheet separator to wall upwards at a distance from the one back pressure. The feed roller 5 is arranged as the second grinding roller, can convey the material to be ground a little along the guide archS. the air are also withdrawn from this side so that ⁶ ° it does not feed air entrained into the inlet 11 of the conveying channel 9 or arches of this grinding roller until 10 separates. Due to the negative pressure in which it can pass through the grinding gap. Advantageously, air is sucked through the aspirator (.lieser ropes, the slow grinding roller, opening 21 from the surrounding space into the, because the effect of the separated conveying air on the upper part of the housing 1. The inlet is greater on the other side and thus the ground material fed in by the 65 11 mixes with the air drawn in by the fast grinding roller, which is better sucked into the conveying channel 9. For this purpose the ground material is concentrated at the leitim.ii the separated conveying air along the outer wall 12 of the conveying channel 9 or sheet

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Scheiders 10. The air coming to the side of the inner wall 13 of the sheet separator 10 is pushed and separated, flows into the continuous discharge channel 15, while the grist through the outer wall 12 of the Bogcnabscheidcrs 10 exactly in the middle of the is supplied to the grinding gap formed by the grinding rollers 2.3. Thanks to the formation of the flue 15, the speed of the separated conveying air remains high enough to pass through the fast grinding roller 2 to push back air entrained in its direction of rotation. This is done under education of small eddies along the whole upper surface of the grinding roller 2, which is next to the undisturbed The course of the feed offers the further advantage that the grinding roller 2 is driven by the air flow is particularly well cooled in the exhaust duct 15.

From the exhaust duct 15, the air passes 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 next processing point. From the sheet separator 10, the separated Conveying air take 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, which are carried away with the exhaust air, go to the grist 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 (6)

2 Ol 1 783 claims: 1. Feeding device for a Müilereiwa'.zensiuhl. with one in front of the grinding pan of the pair of rollers discharging, / ur pneumatic feed the bow separator used for the ground material. wherein the separated conveying air along the surface of the on the inside of the curve of the ßogenabscheiders arranged first grinding roller as well as opposite to its rotational direction is derived, characterized in that that the sheet separator (10) as a conveyor channel (9) flat cross-section and the Roll length corresponding width is formed. at its inlet (11) a feeding in the ground material ' i Mahlguiverieiler (5,6) of the same width is arranged and through its inlet (11) the conveying air is sucked in via one or more aspiration openings (21) in the roller housing (1) will. 2. Feed device according to claim 1, characterized in that some conveying air also along the surface of the second grinding roller (3) through a gap (14) between the outer wall (12) of the sheet separator (10) and this grinding roller is withdrawn. 3. Feed device according to claim 1 or 2. characterized marked; hnet, '.ass the distributor (5. 6) from a food roller .; (5) with gate valve (6), on which a Lenl> '' ogen (8) for deflection of the grist flow into the inlet (11) of the conveying channel (')). 4. Feed device according to one of claims 1 to 3, characterized in that the The separated conveying air is diverted along the first grinding roller (2) through a discharge duct (15) takes place, which is limited by the inner wall (13) of the sheet separator (10). 5. Feed device according to claim 4, characterized in that the first grinding roller (2) is the high speed grinding roller. 6. Feed device according to one of the claims 1 to 5, characterized in that the width of the conveyor channel (9) in the vicinity of the Milling gap can be changed by moving the inner wall (13).