CN1185940C - Flour milling system - Google Patents

Abstract

The present invention relates to a new method and a device for manufacturing grain milling products such as flour, coarse flour, middle flour, etc. A material is milled and sieved for many times by a high-grade flour milling system. The material is suggested that the material at least passes through a double-milling period twice. No sieving device is arranged between double mills. After the material is milled by the double mills, the material is respectively sieved. The present invention has the particular advantages that a correspondence new flour milling system is provided with at least two double-milling channels, and an eight-roller flour mill is preferably made. The new flour milling system is particularly and beneficially the combination of the eight-roller flour mill and a four-roller flour mill. The sieving surfaces of double milling device are respectively larger than 20 to 50%.

Description

Scratch system

Technical field

The present patent application is to be on March 17th, 1989 applying date, and denomination of invention is " Flour milling method and an abrasive dust device ", and application for a patent for invention number is 89101557.4 divides an application.

The present invention relates to make method, by senior scratch system material is carried out repeatedly grinding roller and mill and sieve as flour, meal, middle powder etc.

Background technology

In the cereal processing of industry and commerce, as if there is respectant at least in part strong tendency at present.People require the complete staple food of nutrition, with regard to cereal, and this flour and whole wheat (meal) bread in order to make with regard to almost symbolically referring to grind with stone mill.People scold more or less, as on the one hand being the peasant, being that the road for development of abrasive dust industry of baker and consumer's interface point is wrong on the other hand, because the important composition that contains in (through it) finished product has not existed, incur loss exactly and remaining.Observation problem is the labor division's of excessive development result in this wise, and it also is that situation with " the thought division of labor " of the modern science of bringing therefrom adapts, but observation problem has been ignored several brass tacks in this wise:

-providing good food by majority's eating habit, the consumer should oneself determine him to be ready to select which kind of food as staple food.

-in food processing process, should reduce refining losses as far as possible.

-consider from the energy, should conform with economic condition in the food processing process as far as possible.

-carry out good processing from the nutritional physiology angle, make the food can be as far as possible intactly, promptly less loss ground is absorbed by people and animal.

-food is carried out good cleaning and the processing of salubrity standard fully, for example should remove insanitary microorganism, fungi etc.

-can produce various various different types of food with same raw material.

By ancient stone mill principle, wholewheat flour and whole system/graham flour are by the one or many complete grain of milling, and screen out part shell and grain extexine in case of necessity and make.Until decades ago, this principle also widely passes beyond suspicion and uses.Be that nearly all composition is all stayed in flour or the coarse grained abrasive fully in the grain, and provides high nutrition by bread and cereal product thereof for people as common its advantage of plain grinding pulverized coal preparation system.Yet this ancient method also has its shortcoming.Mill the goods obtained owing to two kinds of reasons with this integral body, and particularly when stores keeping was not good at, its durability was very limited." improvement food " is used for instant consumption and edible mostly accordingly.On the other hand, dust and dirt, bacterium and various fungal spores etc. all stick to the outside of grain usually.These have influenced the quality and the storage performance of product just, and make abrasive article under harsh conditions, promptly can go bad after short term stored.

Be that grain is to be made of the very big component of several difference in addition through commonly overlooked.If the different component of grain is to obtain respectively, they have just determined different qualities such as different mill goods such as flour, meal, middle powder, feed meal, wheat bran, for example special cooking performance.The sort ofly be the essential goods of certain application target (as wheaten food meal, light flour etc.), mill during technology and integral body mills, can only partly separate at common plain grinding.Have only so-called senior flour mill just may produce the very common desired diversified goods of milling of eating habit at present, can keep condition listed earlier and brass tacks again simultaneously.

Select the component not of the same race in the cereal-granules to make or composite flour, can make finished product have the fragrance (whole-wheat bread, half white bread, pigtail shape bread, cake manufactured goods etc.) of complete uniqueness.Particularly senior abrasive dust function is mixed into the various goods of milling that draw respectively a kind of whole wheat or high protein content again or has multiple plumule flour partly.Thereby this senior scratch system can allow cereal is processed more targetedly.Similarly, when carrying out meat packing, it is broken whole livestock " integrally " can not to be cut into meat.

In industrial society, this senior milling process has many advantages that seldom use so far.Medium-sized gristmill output every day that has less staff for example is 100 to 200 tons of finished products.The output of stone mill mill every day of old-fashioned one man operation is 100 to 200 kilograms.

At present the feature of known senior scratch system is, (material) every process is milled and all will be sieved behind the passage.This both had been applicable to that the soft wheat abrasive dust also was applicable to hard wheat abrasive dust and corn abrasive dust.20 years before 30 years, this process often will repeat 15 to 20 times.Development along with recently proved already, and under good operating state, average 12 to 15 times milling just can obtain same effect.Since the seventies began, the senior technology of milling in the senior abrasive dust timesaving of comparing with the former technology of milling for a long time that already adopt had almost worldwide become prior art.

A good gristmill should be able to be to diverse raw material, by the cereal of different quality is mixed and have at mill, particularly by to the extreme care of the different piece of various grain by level separately, and reach the follow-up desired quality standard of processing industry (bread industry, wheaten food factory etc.).

For in competition, basing oneself upon, well-known, when gristmill must produce the high-quality finished product of some at the raw material by some, win victory with higher quality and profit.In other words, a tame cereal milling factory will be devoted to reach the high yield of flour, meal etc. constantly.And gristmill when only keeping quality standard flour mill could move well.For total economic benefit, one be not unessential aspect be in gristmill, to adopt, for example be directly to depend on the scale of milling and sieving the necessary production equipment of port number.Effort in recent years proves, in senior abrasive dust industry, does not directly reduce the output or the quality of item of milling, and just can't continue to shorten mill processes, like this, at present in the development of technology this respect of milling, has in fact accused and has stagnated.

Summary of the invention

Task of the present invention is, develop a kind of new senior milling process, adopt this technology, both can keep the flexibility of flour mill comprehensively and various special milling had been required and the adaptive capacity of end product quality specifications, the controllability of operation that can keep again milling can also improve the economic benefit of gristmill simultaneously.

Be characterised in that according to technical scheme of the present invention material at least twice is by two rollers level of milling, do not have screening process between (device), after twice is milled, just be sized processing and mill at two rollers.

By first test of new method of the present invention, make all professional and technical personnel that participate in the experiment surprised and confirm that the target of proposition can realize fully.Yet the sort ofly not milling with three times of intermediate screening road of attempting of incipient stage, the result who shows is obviously not good as modernized gristmill ironically.Partly cause may be under the grinding efficiency that nowadays requires, the cause that material is overheated, main is because in not milling with three times of intermediate screening road, the material of milling is greatly pulverized inadequately, exactly, produce too much fines in the too early stage.Here approximately disclosed an important secret in the powder process of milling, promptly each job step all will be carried out under the situation that can control and monitor.Total abrasive dust technician should know him with its experience and how act in the everywhere.Therefore in practice, on milling the stage, each all to create special condition, and for example poor, by the output of the passage of milling and the flow process of gristmill etc. by the speed of regulating crushing gap, special groove, grinding roller being set.

The fact shows, each passage of milling comprises that also two sections of two passages of milling are milled, and it is crucial all will keeping controlled and adjustable.Like this, in new technical scheme at least relate to mill aspect, still kept requisite in the production practices (people's) intervention.Concerning an outstanding mill teacher, abrasive dust still is a kind of handicraft as before, and he also can use the sense organ of oneself to go to guide the process of milling responsibly.

Particularly advantageously be, material is synthetically carried out twoly mills and singly mills, and the material of wherein milling all will be through screening behind two mill passage and each passage of singly milling through each.

Particularly preferably being at least the first and second shellings (B1 and B2) and first and second reduction (C1 and C2) respectively is conducted through one and does not mill with the two of intermediate screening subchannel.

Wherein material can be led two levels four to six times of milling, and not sieve between milling for twice, after two milling, sieve respectively again.

This just allows the special combining form that adopts a plurality of two mill passage and two to six passages of singly milling in reduction, sieves behind each passage.

Yet can show with this, adopt new senior milling process to utilize advantage of the present invention more or less, so compared with prior art, can reduce by 10 to percent 30 cost of equipment for every kind of special circumstances.

In addition, the present invention relates to produce the cereal milling equipment of grain milling goods such as flour, meal, middle powder etc., this gristmill has the right passage and with the senior scratch system of the screening passage in thereafter band plansifter and sieve chamber of milling of a plurality of band grinding rollers.

This new cereal milling system is characterised in that, it has at least two respectively with two two passages of milling that the grinding roller of settling successively is right, two grinding rollers between there is no screening plant.

Because new scratch system can make operation concentrated greatly, so it is structurally superior than the similar scratch system in past far away.

The superior especially part of new cereal milling system is that its per two two passages of milling constitute a roller flour mill unit, so it is designed to eight-roller mill, it is right respectively to have two mutual stacked grinding rollers.

This structure of eight-roller mill also provides new monitoring possibility for the abrasive dust worker, and he can be at one time, monitor these two simultaneously in same place mills the stage.In other words, no matter be for example right variation of first and second grinding roller, still the right variation of first grinding roller can judge immediately to the right result's that mills of second grinding roller that may not change influence.Understand according to the applicant, this point still belongs to unprecedented so far in senior flour mill field.Owing to all will sieve between milling in the prior art at every turn, so not only need wait material through screening plant and second mill the level the corresponding time, and because various compositions are led to other passages, the composition of the material of milling has had change by the screening of inserting in the middle of each.The fact shows that the sort of small shortcoming that has very little a part of material to be pulverized owing to being compensated completely the advantage of two grinding rollers to direct control and intervention unnecessaryly in milling in second road.

Best solution is to adopt the form of two the mill passage and the passage combinations of singly milling at present, respectively has a screening passage simultaneously behind two the mill passage and the passages of singly milling.

Particularly advantageous is in this combination, to adopt the combination of eight-roller mill and four roll mill powder machine.

Suggestion again is provided with two eight-roller mills at least in addition, and each grinding roller is to being provided with crushing gap adjusting device alone simultaneously.

Each grinding roller on eight-roller mill top on should respectively establish an adjustable feeding adjusting device and one and be used for powder from the grinding roller on top the grinding roller that directly is sent to the bottom funnelform product orientation device, each grinding roller is to all disposing grinding gap adjusting device.Take a sample after milling passage at each, grinding roller is to the last inspection valve that also respectively disposes.

In addition, the top grinding roller is to preferably all being connected on the air intake device by passage with the right feeding bin of bottom grinding roller.

Needs according to abrasive dust, suggestion again in addition, the every pair of grinding roller is to all intactly setting up adjusting device and impurity protector alone, the rotary speed that the right grinding roller of each grinding roller is had nothing in common with each other mostly (speed is poor), and stacked grinding roller is to preferably having the separator of common control.

If every pair of right roller of grinding roller all is arranged in the horizontal plane, control is then more convenient with maintenance work.

Further develop design of the present invention,, and have a compact cleaning plant, at least two eight-roller mills and a big plansifter, can make entire equipment obtain another big advantage if grain mill is designed to compact flour mill.

Operation is concentrated often some disadvantage.Yet new grain mill but shows, reasonably concentrates more favourable comprehensive grasp situation, and allows to make rapider reaction.Like this, just made things convenient for the operation of flour mill, when adapting to much more operating position, can reach with prior art in identical quality standard.The complexity of abrasive dust flow process reduces significantly.By configuration remote control on every grinding gap adjusting device and be used to store and call and be the special crushing gap adjusted value of the every kind of task setting of milling and the every other processing and the computer installation of conveyer adjusted value, the present invention's design also provides better starting point for reasonably further improving automaticity.If the situation of raw material and other parameters such as environment temperature, air humidity, all parts (compass screen surface rate of tension of the rill of grinding roller, plansifter or the like) is known, flour mill just can need not the professional directly at the scene in a long time through once good adjustment, and running fully automatically.Like this, the present invention can turn into the perfection of senior flour mill and huge contribution, does not only need equipment and operation further complicatedly, and has simplified on the contrary, and the work efficiency of flour mill is almost had no effect.

Description of drawings

Below other details of the present invention are described further.Wherein:

Fig. 1 is an eight-roller mill;

Fig. 2 is the driving of flour mill of Fig. 1 and the front view of adjusting device;

Fig. 3 is the new cereal milling factory of a cover;

Fig. 4 is the flow chart of milling and sieving by prior art;

Fig. 5 is the new example of milling and sieving flow chart;

Fig. 6 is the schematic diagram with screening process of milling of another embodiment.

The specific embodiment

Now Fig. 1 is illustrated.Eight-roller mill 1 includes two and half ones, and the left side is a shelling passage 2, and right-hand part is a reduction passage 3.Shelling passage 2 has the grinding roller 4 and 5 of with groove mostly, can see in the drawings, and the speed two arrows of grinding roller 5 usefulness is faster represented.Below grinding roller 4 and 5, respectively be provided with a scraper brush 6.In the reduction passage, in most cases adopt level and smooth grinding roller 7 and 8, and for keeping the bright and clean scraper 9 of roller surface.Respectively by each special milling processing, the grinding roller of each bottom to 4 ', 5 ' and 7 ', 8 ' with top grinding roller accordingly to the same, have same kind coarse groove, microgroove grinding roller or make smooth grinding roller.

Cereal by feeder 10 from left or the right-hand roller flour mill 1 that is imported into.Only under the state of a large amount of materials of processing, the left side of roller flour mill and right-hand part be feed simultaneously, and each half one must process half of charging.One sensor 11 is arranged in feeder 10, and it makes so-called " Christmas tree " shape in the drawings, feeding mechanism 12 of this sensor control, and the feeder 10 and come herein material of flowing through above making is sent with identical amount by product feeding mechanism 12.Material directly imports crushing gap by a defeated material passage 13.In feed alley 13, form one powerful air stream.This air stream can advantageously be guaranteed by two air ducts 14 around grinding roller 4,5 and 7,8.Through the top grinding roller to the powder of 4, the 5 shellings crushing gap between grinding roller that product output hopper 20 directly enters the bottom is to 4 ', 5 '.Also be sucked at the air of bottom grinding roller in by air duct 14 to 4 ', 5 '.Lifting device in the middle of powder sends to by a product output hopper 21 and a transfer element 22.All the four pairs rollers 4,5 of milling, 4 ', 5 ', 7,8,7 ', 8 ' can adjust its crushing gap by an adjusting device 15 respectively.Remaining device all uses in common four (mill) roller flour mill as impurity protector, engaging and disengaging device etc.Full content is all seen DE-PS27 30166 herein.The fact shows, at the right construction unit of grinding roller shown in described applicant's the open file, also can very advantageously use in eight-roller mill.Like this, when eight-roller mill was combined with four roll mill powder machine, under any circumstance, all grinding rollers all had identical basic structure.Still all be another advantage to the user to manufacturer like this.

Under individual other situation, the bottom grinding roller right on a feeding grinding roller or product dispensation grinding roller can be set.But preferably carry out the right joint of two grinding rollers and separate by common sensor 11.

Right half side at figure set up outlet passageway 18 in the product output hopper.This device is favourable for middle powder, the flours material of milling especially, because air flue is what to separate with product product path, thereby the powder stream that falls can be to guide compactly.

Each grinding roller respectively is provided with grinding gap adjusting device alone to (4,5-7,8), and this adjusting device is made up of handwheel 15 and corresponding adjustment means part thereof.One motorized adjustment device 16 can be set in addition, and the two can monitor the instantaneous distance value of two grinding rollers by display unit 17.In addition, motorized adjustment can be undertaken by computer (R) and memory SP.

Each grinding roller is checked valve 19 to being equipped with one, and its right half side top in the drawings is in the closed position, and in enable possition, place, bottom.No matter whether roller flour mill operates, and this inspection valve all can be opened.Can make atmospheric pressure state keep invariable by the above-described air duct of setting up 14,18, thereby make the state of milling also keep invariable.

The following describes Fig. 2, wherein guiding mechanism occurs with the form of standard package 100 and controllable adjusting drive unit 100 '.Two grinding rollers 104 and 105 are supported on the same support 101, and grinding roller 105 is fixed on the cam pin 102 of a fixed-site swingably, and (grinding roller) joint is controlled with separating by a corresponding lever 103 and a separation cylinder 106.By the oscillating motion of lever 103, cam pin 102 corresponding rotations, thus cause the lower horizontal of the support housing 107 that can swing to move, so just can set up the distance between two grinding rollers in advance.This device is not suitable for grinding roller is adjusted accurately.It only is applicable to and makes grinding roller enter the position that engages or separate, or enters two fixing positions.Accurate adjustment to grinding roller 104 and 105 is carried out with adjusting screw(rod) 108.This screw rod directly makes by its rotation and adjusts swivel bearing 110 swings of arm 109 around a fixed-site.The short end of adjusting above the arm 109 is connected with the support housing 107 that can swing by the contact ground of pull bar 111 by power.The transmission of power is by being that the cutting edge portion of the part of overload spring safeties 112 finishes on a side.One adjustable reverse stop head 113 is arranged on the pull bar 111 of a relative side, and the device for pressure measurement 114 of band pressure-indication means 115.For can be simultaneously in when maintenance to grinding roller to adjusting, can calibrate by adjusting screw element 143,144 in a corresponding side.Adjust screw rod 108 and fix by bearing 110 ' holding position, and handwheel 116 that can be by having the demonstration clock of directly packing into or operate by electric tool, driving-chain 118 and drive motor 119.Drive motor 119 is fixed on the roller flour mill 126, and it directly is connected with adjustment axle 108 with a sprocket wheel 123 by a slip-clutch.

In addition, also have a position indicator 120 directly to be connected with adjustment axle 108, like this, sprocket wheel 123 is all write down and is transferred into desired location by position indicator 120 with each action of handwheel 116.In addition, only schematically show one among Fig. 2 and drive belt 128, it is used to drive grinding roller 104 and 105 and 104 ' and 105 '.Also an electrical power requirements quantitative determination and indicating device 129 can be set in drive system.For example electric power consumption can be confined to when exceeding preselected range, for example can make the grinding roller relative separation in low value and the high value scope with this.

All signals of roller flour mill preferably can be coordinated and controlled by being located at computer R in the flour mill, and this computer can call required rated value in the central computer of tape storage SP.Position indicator preferably is provided with the position limit switch that transfers to the preliminary election limiting value, so just can prevent wrong the adjusting automatically.The advantage of position authority switch is also can prevent wrong manual adjustments, because all can cause the corresponding displacement of chain 118 by handwheel adjusting and automatic adjusting.Position indicator 120 also can be connected with an input/output unit as regulating motor 119 fully, and this input unit obtains corresponding signal from the computer in the flour mill, and provides these signals corresponding to numeral demonstration and manual load key.Same, pressure measxurement and indicating device 114,115 can couple together with the computer in the flour mill.Press the augmentation scenarios of flour mill, can in a flour mill, one or more safeties be set.If what for example pack into is the grinding roller that is carved with rill, then the monitoring pressure of milling is just not too important, and the monitoring mill is milled distance between the grinding roller-no matter by position indicator or by rangefinder-be favourable on the contrary.But it is then just the opposite for level and smooth grinding roller.For level and smooth grinding roller, pressure monitoring is more favourable.Should represent that by computer and the signal line that illustrates computer and memory can control-gristmill (system) many, sometimes or even all flour mills, when needing, also its regulatory function of tunable.

In addition, particularly advantageous is that numeral shows that device provides a numerical value (clock 05:50) that is equivalent to the time register indication, preferably shows a same value corresponding to the position indicator clock indication of handwheel.

An outstanding advantage is, the empirical value of the roller flour mill of nonautomatic and non-remote control can be compared, and in order to constitute or to improve corresponding control programs.

Fig. 3 illustrates a complete cereal milling factory greatly simplifiedly.See that roughly this gristmill includes one and is used to store feed bin 30, the mixing of cereal and puts storehouse 31, system of processing 32 and finished bin 33 compositions temporarily.In warehouse for finished product 33 back, finished product is directly delivered goods through weighing device 34.

Detailed workflow is as follows:

From hopper 35,35 ₁, 35 ₂, 35 ₃Deng the required cereal materials compound of supply through weighed 36, horizontal feed device 37, elevator 38 and another horizontal feed device 39 send into mixing tank for coating colors 40.Still discharge from mixing tank for coating colors 40 without the cereal of cleaning, be sent to grain cleaning machine 44 through scale 41, horizontal feed device 42 and elevator 43.In compact cleaning plant 45, sift out big impurity (clod), pick stone, inhale peeling shell part.(full content is included in the applicant in the patent application CH-PA of Switzerland Nr.04 626/87-6).Subsequently, material is sent into cylinder separator 46, removes microscler and circular foreign peoples's vegetable seeds at this, removes the dirt that is attached to the cereal surface by brusher 47, the water of requirement deal is added pressure moistening device 48, and allow the time of in putting groove 49 temporarily, preserving one section necessity through moistening material.Will through moistening and 12 to 48 hours the cereal of approximately having stored take out from putting temporarily in groove 49 or 50, promote with elevator 43 ', after adding 0.1 to 0.3% water (in the moistening device 51 in the B1 front), directly be sent to first channel B 1 that is first pair passage 53 of milling of milling with back at homogenization groove 52.

Material is led for milling through two passages 53 of milling, 53 ', 54,54 ' etc., and after carrying out two milling, material is sent in the screening chamber of big plansifter 56 by a pneumatic conveyor 55 at every turn.The milling device at so-called rear portion is designed to single milling device 57 as before.Material is risen by these single milling device 57 places, through a grinding roller of corresponding four roll mill powder machine to after, be sent in the plansifter 58 by the general size of prior art.From milling device, through big plansifter 56, the screening unit that plansifter 58 or other adopt in gristmill, the finished product that produces as wheat flour purifier etc. stores in warehouse 59,60,61,62,63, and supplies on demand through scale 34.This moment, finished product can be prepared for delivery by pack station 64 or tank car device for discharging 65.Entire equipment is controlled by the CCU with all necessary computer meanses by the total technician of gristmill.

Another interesting advantage is, after two passages of milling, can adopt have special bigger screening face for example than big 60 30 percent to percent the large-scale separator of compass screen surface of four roll mill powder machine, like this, just can again increase work efficiency.

By estimation at present, the present invention can save 10 to percent 40 space and machinery altogether with regard to plansifter and roller flour mill, and can not cause the defective of the new not known principle of milling when keeping abrasive dust output and end product quality.Energy resource consumption also can obviously reduce.

Flow chart by the cereal milling factory of a coordinate standard of prior art has been shown among Fig. 4.Simple shelling passage (B1, B2, B3, B4) with the symbolistic grinding roller of drawing shade to illustrating.This expression, these grinding rollers are to being carved with rill.

All be sent to the screening passage through the meal material that obtains behind the passage of singly milling (B1 and B2 etc.), so that distinguish different granularities at every turn.The partial material of milling by B3 and B4 is also led through wheat-bran brushing machine DBr ₁And DBr ₂To remove wheat bran.Wheat-bran brushing machine Br ₁And Br ₂Sieving by DBr ₁And DBr ₂Receive, and further be divided into flour and wheat bran.DBr ₃Sieving at special plansifter separate space DBr ₁In clean.Correspondingly, the flour from all next filtrations of pneumatic conveyor sieves in plansifter separate space DF.The material that B1 and B2 discharge is directly at (meal) wheat flour purifier P ₁And P ₂In clean.

Reduction channel C 1-C11 accepts Div ₁, P ₁And P ₂The powder that sieves.With the same, after the material of milling is milled in the reduction passage at every turn, also be imported in the screening chamber that connects after corresponding at the shelling passage.The order that material flow increases progressively according to numeral 1,2,3 etc. is from the first passage guiding first screening passage of milling, from the second passage guiding second screening passage or the like of milling.Each sieving that screens in the passage can be used as the final flour discharge.

In the reduction passage, the loose powder device (in order to loose agglomerate) that between grinding roller milling device and separator, adopts a circle to represent respectively, or adopt one to be used for the loose special aeration apparatus of tension force (circle of band taper).

Fig. 5 illustrates the flow chart of the task gristmill identical with the gristmill of Fig. 4 with the production capacity scale, and Fig. 5 is new technical scheme, and Fig. 4 is the prior art as its contrast.

The grinding roller of stack setting is to being two milling devices in Fig. 5 each other.Initial two shelling channel B 1 and B2 are combined into first pair passage 53 of milling.B3 and B4 then are second pair of passage of milling, first and second pairs of synthetic first eight-roller mills 67 as shown in Figure 3 of the channel group of milling.In view of the above, reduction channel C 1, C2, C4 and C5 form eight-roller mill 68, reduction channel C 7, and C8, C9 and C10 form eight grinding roller grinding machines 69.Have only reduction channel C 3 and C6 to make the passage of singly milling, the prior art of this and Fig. 4 is the same, and they are at this common four roll mill powder machine 57 of pressing Fig. 3 of forming.

The flow chart of Fig. 5 is a preferred embodiment naturally, and as previously mentioned, this embodiment can have great transition probabilities within the scope of the present invention.As long as looking at that Fig. 4 and Fig. 5 just can know finds that its structure obviously simplifies, just be enough to realize the simplification of this structure by (the present invention) new design.

Below Fig. 6 is illustrated.Fig. 6 illustrates the situation that two passages of milling combine with the passage of singly milling.Two channel B 1/B2 and C1/C2 of milling are combined in the unique eight-roller mill 70.Conveyance conduit 141 is delivered to the material of milling of first couple of milling device B1/B2 on the first screening chamber 73.The B3 of the third and fourth shelling passage is corresponding with the coarse fodder of B4 to mill on the passage of singly milling of a four roll mill powder machine 142.Elevator 143 and 144 is sent into the coarse fodder of the 3rd and the 4th shelling passage in corresponding screening chamber 145 and 146.Two reduction channel C 1 are again to be made as two milling devices with C2, and the material that is produced by C2 is imported into the second sieve chamber 74 by a pneumatic conveyance conduit 140.Reduction channel C 3 and C4 are designed to singly mill passage (four roll mill powder machine 151), and corresponding articles is transported in the corresponding the 3rd and the 4th sieve chamber 149 and 150 with elevator 147 and 148.Reduction passage subsequently, the same with the shelling passage of unshowned back, can make by the special requirement of gristmill and two mill or singly mill passage.Big horizontal screen 73,74 etc. can be combined in the king-sized big plansifter 152, and is corresponding, and screening chamber 145,146,149,150 can be combined in the plansifter 153 equally, and is the same with prior art.

Claims (15)

1, a kind ofly utilize senior abrasive dust principle to become the scratch system of powder, described system to comprise 12-20 the passage of milling grain milling, be positioned at the described passage downstream of milling and be provided with the screening passage, it is characterized in that,

In described system, also be provided with:

One or more passages of singly milling, material are milled once in the passage of singly milling, and are sized then;

One or more two passages of milling, material is milled twice continuously in described two passages of milling, be sized then, each two passage of milling comprises two pairs of grinding rollers of continuous setting, between two pairs of grinding rollers, described two pairs of grinding roller upper and lower settings, and also each all is positioned on the horizontal plane grinding roller;

At least the first shelling passage (B1) and the second shelling passage (B2) are made of described two passages of milling integratedly; And the described first reduction passage (C1) and the second reduction passage (C2) also are made of described two passages of milling integratedly.

By the described system of claim 1, it is characterized in that 2, described system comprises 4 to 6 two passages of milling.

3, by claim 1 or 2 described systems, it is characterized in that described system comprises 2 to 6 passages of singly milling in the reduction passage.

By the system of claim 1, it is characterized in that 4, the structure of described two channels designs all-in-one-piece eight-roller mills of milling, two parts about described flour mill is divided into, each part comprise two passage of milling.

5, by the system of claim 4, it is characterized in that, each the top grinding roller on the described eight-roller mill on, each disposes an adjustable feeding adjusting device.

6, by the system of claim 4, it is characterized in that, two grinding rollers of described half one between, be provided with an output hopper (20), be used for directly being directed to the right crushing gap of bottom grinding roller, and screening in the middle of not needing from the right material of top grinding roller.

7, by the system of claim 4, it is characterized in that described half one of described two and half ones comprises the grinding roller that has rill, another one half one comprises smooth grinding roller.

8, by the system of claim 4, it is characterized in that in every pair of grinding roller, the rotating speed of two grinding rollers is inequality.

9, by the system of claim 4, it is characterized in that the top grinding roller is to all matching with getter device with the right feed passageway of bottom grinding roller.

10, by the system of claim 4, it is characterized in that, be provided with outlet passageway (18) in the right product output hopper (21) of described bottom grinding roller.

11, by the system of claim 4, it is characterized in that each grinding roller is to being provided with grinding gap adjusting device.

12, by the system of claim 11, it is characterized in that, for described grinding gap adjusting device, the computer installation that disposes remote control and be used to store and call the crushing gap value that sets for every kind of task of milling.

13, press the system of claim 12, it is characterized in that, in described each grinding roller lash adjusting device, support (101) is used to support grinding roller (104,105), one of them grinding roller (105) is fixed on the cam pin (102) of a fixed-site swingably, grinding roller (104,105) joint is controlled with separating by a corresponding lever (103) and a separation cylinder (106), oscillating motion by lever (103), the corresponding rotation of cam pin (102), thus cause the lower horizontal of the support housing (107) that can swing to move; To grinding roller (104,105) accurate adjustment is finished with adjusting screw(rod) (108), this screw rod (108) directly makes by its rotation and adjusts swivel bearing (110) swing of arm (109) around a fixed-site, the short end of adjusting above the arm (109) is connected with the support housing that can swing (107) by pull bar (111), the transmission of power is by being that the cutting edge portion of the part of overload spring safeties (112) finishes on a side, the device for pressure measurement (114) that one adjustable reverse stop head (113) and band pressure-indication means (115) are arranged on the pull bar (111) of a relative side, adjusting screw rod (108) fixes by bearing (110) holding position, and can or pass through electric tool by the handwheel (116) that has, driving-chain (118) and drive motor (119) are operated, and drive motor (119) directly is connected with adjustment axle (108) with a sprocket wheel (123) by a slip-clutch.

By the arbitrary system of aforesaid right requirement 5-13, it is characterized in that 14, it also has the device of the compactness that is made of cleaning plant, at least two eight-roller mills and big plansifter.

By the system of claim 1, it is characterized in that 15, the downstream of described two passages of milling disposes the mill screening passage that compass screen surface constituted of compass screen surface big 20% to 50% of passage of average specific list respectively.

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